To see the other types of publications on this topic, follow the link: Clipped.
Dissertations / Theses on the topic 'Clipped'
Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles
Consult the top 50 dissertations / theses for your research on the topic 'Clipped.'
Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.
You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.
Browse dissertations / theses on a wide variety of disciplines and organise your bibliography correctly.
1
Mohamed, Salma Darwish Abd Elaziz. "Modified Asymmetrically Clipped Optical Orthogonal Frequency Division Multiplexing (MACO-OFDM) system." Thesis, University of Strathclyde, 2015. http://oleg.lib.strath.ac.uk:80/R/?func=dbin-jump-full&object_id=25820.
Full textAbstract:
A modification to the Asymmetrically Clipped Optical OFDM (ACO-OFDM) technique, a well reported non-coherent optical implementation is proposed. A Modified ACO-OFDM (MACO-OFDM) system is developed to improve system performance at the expense of spectral efficiency. A MACO-OFDM system model is defined underpinned by a detailed mathematical framework verified through Monte Carlo simulations. System performance is compared to that of conventional ACO-OFDM. A 1.5 dB saving is achieved in the Bit Error Rate (BER) performance of 4-QAM ACO-OFDM after applying the proposed modification; the theoretical and simulation results are in good agreement. As the constellation size increases, the improvement in BER performance decreases. The research then treats the impact of atmospheric turbulence on the performance of both conventional ACO-OFDM and the proposed MACO-OFDM system. A Single Input Multiple Output (SIMO) approach using multiple receivers is employed to mitigate the impact of atmospheric turbulence. The performance of MACO-OFDM outperforms that of ACO-OFDM by nearly 3 dB, 4 dB, and 5 dB as the number of receiving apertures (nRx) increases as 1, 2, and 4 respectively in weak atmospheric turbulence; in moderate turbulence the performance is improved by 2 dB, and 4.5 dB for nRx=2, and nRx=4; and in strong turbulence, the BER performance is enhanced by nearly 2 dB and 4 dB for nRx=2 and nRx=4. The channel capacity of MACO-OFDM has been shown to be half that of conventional ACO-OFDM. The capacity of SIMO MACO-OFDM architecture in atmospheric turbulent channel is evaluated.
2
Mahoney, James Scott, and n/a. "Clipped Wings: Management discourses during organisational change at Australia's Civil Aviation Authority." University of Canberra. Arts & Design, 2007. http://erl.canberra.edu.au./public/adt-AUC20081113.153047.
Full textAbstract:
Structural change in organisations is stressful for staff and the managers who must implement it. Most change programs use employee communication techniques to support change directions set by senior executive decision makers-dominant coalitions.
This research used a single case study to explain the context and management discourses of a major re-structure of an Australian Federal Government agency, the former Civil Aviation Authority (CAA), during the early 1990s. A content analysis examined the use of keywords in management discourses that argued the need for change. The keywords represented the two major change discourses: micro-economic reform and aviation safety regulation. A critical discourse analysis investigated the dominant coalition's discourse strategies to justify change. Content and process communication theories, and the role of framing in organisational change, were used to explain how employees may have reacted to change directions.
The research found that change directions were framed as an economic imperative that clashed with a traditional organisational culture that emphasised the primacy of aviation safety. It found that mixed messages by the two principal members of the dominant coalition who drove change exacerbated the clash.
The results suggest a need for further analysis of management discourses used to inform employees about structural change, especially in organisations that have legislative responsibilities. Further analysis of change messages framed by dominant coalitions could lead to a deeper understanding ofhow they affect employees and the change process.
3
Gidmark, Anders, and Helena Olofson. "Restoration of clipped sound signals -a weighted Fourier series and AR approach." Thesis, KTH, Optimeringslära och systemteori, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-133464.
Full textAbstract:
Sound signals can be distorted in many dierent ways, one of them is called clipping. A clipped sound signal diers from a non-clipped signal in the way that the amplitudes of the sound wave that are higher than a certain amplitude threshold has been partially lowered or completely lowered to the threshold, the latter is called hard clipping. Since data is lost when a signal is clipped, there is an interest in restoring the signal. For a hard clipped signal, it is often impossible to perfectly restore the signal. In this thesis two dierent methods for partially restoring a symmetrically hard clipped signal are suggested. The two methods considered are a weighted Fourier series (WFS) t and an autoregressive (AR) model approach. Both methods attempt to restore the signal by solving optimization problems designed to min- imize the errors of the respective model. Evaluation and comparison of the two methods showed that the AR method typically performed better than the WFS method. The AR method was eec- tive at restoring the signal, while the WFS method stuck close to the clipped signal, which might be due to dierences in their optimization problems.
4
Mahoney, James Scott. "Clipped wings : management discourses during organisational change at Australia's Civil Avilation Authority /." Canberra, 2007. http://erl.canberra.edu.au/public/adt-AUC20081113.153047/index.html.
Full text
5
Hsu, Annjia Tinna. "Fourier transform spectra of tailored and clipped time-domain signals : applications for magnetic resonance imaging and mass spectrometry /." The Ohio State University, 1987. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487584612165679.
Full text
6
Ramoeketsi, Khetsi Samuel 1951. "Comparison of the nutrient value of clipped and esophageal dietary samples of cattle grazing Lehmann lovegrass (Eragrostis Lehmanniana, nees)." Thesis, The University of Arizona, 1990. http://hdl.handle.net/10150/277260.
Full textAbstract:
Two trials were conducted to demonstrate diet selected by grazing cattle. Selection criteria were investigated on the basis of cattle selection for plant species, green leaf in preference to dry leaf or dry stem and the chemical contents of esophageal samples versus those in the standing crop. The influence of residual old vegetation on selection ability was studied by mowing all or part of the pasture. Cattle consumed Lehmann lovegrass in preference to shrubby species (Table 1). The esophageal samples contained higher levels of protein, phosphorus and IVDMD than that in the standing crop in both Trial 1 and Trial 2. Neutral detergent fiber was higher in the standing crop than in the esophageal samples, whereas in Trial 2, there appeared to be no difference in NDF. Removal of old vegetation by mowing had no effect on selection for plant parts. Cattle selected green leaf, in preference to dry leaf or dry stem regardless of the presence of old material. Free ranging cattle selected a diet that was higher in nutrient density and more digestible than the available forage.
7
Taylor, Anna B. "A Study of Variable Selection Methods in Supersaturated Models." Bowling Green State University / OhioLINK, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1586963467541177.
Full text
8
Орлик, В. М., та V. Orlyk. "Обрізаний шилінг магістра Тевтонського ордену Міхаеля Кюхмейстер фон Штернберга знайдений на Львівщині". Thesis, Переяслав-Хмельницький ДПУ ім. Г. Сковороди, 2016. http://dspace.kntu.kr.ua/jspui/handle/123456789/7271.
Full textAbstract:
Тези розкривають питання знахідок у Львівському регіоні обрізаного шилінга магістра Тевтонського ордену Міхаеля Кюхмейстер фон Штернберга. Подано метричні характеристики, відомості про склад металу монет та їх ілюстрації. The thesis reveals the findings of the excavations in the Lviv region of the crop schilling of the Master of the Teutonic Order of Michael Keukhmeister von Sternberg. Submitted metric characteristics, information about the composition of metal coins and their illustrations.
9
Denham, Robert. "Two-toed claw clipper." Cincinnati, Ohio : University of Cincinnati, 2005. http://www.ohiolink.edu/etd/view.cgi?acc%5Fnum=ucin1108741331.
Full text
10
DENHAM, ROBERT DAVID. "TWO-TOED CLAW-CLIPPER." University of Cincinnati / OhioLINK, 2005. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1108741331.
Full text
11
Spengane, Zandile Namhla Elizabeth. "Blood and virus detection on barber hair clippers." Master's thesis, Faculty of Health Sciences, 2019. http://hdl.handle.net/11427/30855.
Full textAbstract:
Background: Bleeding from the popular clean-shave ‘chiskop’ haircut was recently reported as prevalent in South Africa (SA), a country with 6.9 million HIV-infected people. Objectives. To investigate the prevalence of barber hair clipper contamination with blood and HIV and hepatitis B viruses. Methods: Fifty barbers from three townships in Cape Town, SA, were invited to participate. One clipper from each barber was collected immediately after it had been used for a cleanshave haircut. Each clipper was rinsed with phosphate-buffered saline and then submerged in viral medium. The polymerase chain reaction (PCR) was used to identify the bloodspecific RNA marker haemoglobin beta (HBB), hepatitis B virus (HBV) and HIV. Results: The clean-shave haircut was the most common haircut requested by clients (78%). Of the clippers collected, 42% were positive for HBB, confirming detection of blood, none were positive for HIV, and 4 (8%) were positive for HBV. Two clippers (clippers 16 and 20) were positive on qualitative HBV PCR. HBV DNA from clipper 16 clustered with genotype A sequences from SA, India, Brazil and Martinique, while clipper 20 clustered with SA genotype D sequences. The clipper 20 sequence was identical to a subtype D sequence (GenBank accession AY233291) from Gauteng, SA. Conclusion: This study confirms that there is significant contamination of barber hair clippers with blood and blood-borne viruses. Hepatitis B was detected with enough DNA copies to pose a risk of transmitting infection. Although HIV was not detected in this small study, the risk of transmission should be quantified. Further studies to investigate barber clipper sterilization practices and whether the clean-shave hairstyle is an independent risk factor for HIV, HBV and hepatitis C virus infections are warranted. Public education on individual clipper ownership (as is the case with a toothbrush) should be advocated for clean-shave and blade-fade haircuts.
12
Cierlik, Izabela Anna. "Regulation of callose synthases and beta-1,3-glucanases during aphid infestation on barley cv. Clipper." Thesis, Södertörn University College, School of Life Sciences, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:sh:diva-1568.
Full textAbstract:
<p>Plant resistance hypothesis says that under a period of time when a plant is exposed to powerful herbivore attack it will prioritise defence as a major metabolic function. In theory, induced plant defence (resistance) will provide opportunities for this organism to “invest” in other functions, in example growth when attackers are absent.</p><p>One of the compounds taking part in plant defence is callose. This β-1,3-glucan is synthesised by callose synthase and broken down by β-1,3-glucanase. Deposition of callose occurs as a reaction to aphid attack an varies, depending on cultivars, and aphid species. In this experiment barley (Hordeum vulgare) cultivar Clipper is being infested with two types of aphids: Russian wheat aphid (RWA, Diuraphis noxia) and bird cherry-oat aphid (BCA, Rhopalosiphium padi) over a time period. Infestation by those two insects results in different callose formation and deposition level.</p><p>Six sequences encoding for putative callose synthase genes and nine sequences encoding for β-1,3-glucanase were examined by RT-PCR and Real – Time PCR methods for different expression patterns.</p><p>The results did not show any significant regulation of gene expression during RWA and BCA attack for any of these genes. Thus the pathway regulating aphid – induced callose deposition in barley reminds unresolved.</p>
13
Brighi, Giancorrado. "Indagine sulle possibilità di occultazione operate dal toro di Io sulle missioni Juno ed Europa Clipper." Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2019. http://amslaurea.unibo.it/19077/.
Full textAbstract:
Questo elaborato si propone di valutare le opportunità di occultazione operate dal toro di plasma di Io sulle comunicazioni tra le sonde Juno ed Europa Clipper, in orbita attorno a Giove, con la Terra. Lo scopo ultimo della tesi è studiare la science phase di due missioni interplanetarie e ottenere dati quantitativi sulla presenza di un frequency shift nelle portanti dei segnali trasmessi dalle sonde, ottenerne un andamento nel tempo e localizzare le finestre temporali di missione in cui questo non sia nullo. Di tutte le reali possibili cause di un’alterazione frequenziale la sola di interesse è il plasma contenuto nel toro di Io, dunque il problema è stato affrontato trascurando fenomeni di multipath, interferenze prodotte dalla ionosfera di Giove o della Terra, o ancora il rumore di trasmettitore e ricevitore.
Con l’ausilio del software MATLAB e del suo toolkit MICE si è ricreato il modello matematico del toro di Io proposto da Phipps, assialsimmetrico e tempo invariante, ottenuta un’evoluzione temporale della posizione di sonde e Terra nel tempo e integrata la densità elettronica locale dovuta al plasma lungo le diverse congiungenti, immaginate per semplicità coincidenti con le traiettorie del segnale elettromagnetico. Dal contenuto totale di elettroni tra sonda e Terra in un dato istante si è ottenuto il path delay, e poi il frequency shift, per poi passare all’istante successivo e ripetere il calcolo per un intervallo di tempo ampio a piacere. Il movimento del segnale elettromagnetico si è considerato infinitamente veloce (non si sono usati parametri correttivi relativi al light time), e si è usata una configurazione One-Way del link sonda-Terra.
14
Gusmão, Daniel Martins. "Sítios arqueológicos de naufrágios da Baía de Todos os Santos, Salvador-BA : estudo de caso do Clipper Blackadder." Universidade Federal de Sergipe, 2015. https://ri.ufs.br/handle/riufs/3222.
Full textAbstract:
With a coast of approximately 8.500 km of extension, Brazil possesses a maritime scenario of
great archaeological potency, formed mainly by rests of shipwrecks, port structures, maritime
religiosity spaces, the sanctuary sites, and the depository sites. In the last twenty years of
scientifically archaeological research, we entered in an innovative reality proposal that intends
to encompass the many varied dimensions of human interaction with the aquatic environment,
through the analyses of the multiple social and material expressions arising from this
perception, be it from the nautical, maritime, or underwater segment corroborating in an
Archaeology of Aquatic Environment. In the intent to evaluate the development and the
perspective of this research field in Brazil, our dissertation has as one of its goals to do a
approach of archaeological sites formed by rests of shipwrecks at the All Saints Bay - Bahia,
relating historical, technical, nautical and social archaeological arising from this types of sites,
by means of a inventory liability until reaching the research in situ from the rests of the
clipper Blackadder. To this end we land in Public Archaeology, approaching segments of
society to better understand the importance and meaning of shipwrecks archaeological sites as
an integral part of the Underwater Brazilian Cultural Heritage.<br>Com um litoral de aproximadamente 8.500 km de extensão, o Brasil apresenta um cenário
marítimo de grande potencial arqueológico, formado principalmente por restos de
embarcações naufragadas, estruturas portuárias, espaços de religiosidade marítima, sítios
santuários, e sítios depositários. Nesses últimos 20 anos de pesquisas arqueológicas
científicas, ingressamos numa realidade de proposta inovadora que visa englobar as mais
variadas vertentes da interação do ser humano com o ambiente aquático, através da análise
das múltiplas expressões materiais e sociais advindas desta percepção, seja ela do segmento
marítimo, náutico ou subaquático corroborando numa Arqueologia de Ambientes Aquáticos.
No intuito de avaliar o desenvolvimento e as perspectivas deste campo de pesquisa no Brasil,
nossa dissertação tem como um dos objetivos desenvolver uma abordagem de sítios
arqueológicos formados por restos de embarcações naufragadas na Baía de Todos os Santos,
Salvador - BA, relacionando informações históricas, técnicas, náuticas e sociais advindas
desses tipos de sítios, por meio de um inventário passivo até alcançar a pesquisa in situ dos
restos do clipper Blackadder. Nessa perspectiva, nos aportamos na Arqueologia Pública,
aproximando segmentos da sociedade para melhor compreender a importância e significância
dos sítios arqueológicos de naufrágios como um elemento integrante do patrimônio cultural
subaquático brasileiro.
15
Markevičienė, Jurgita. "Ryšių su klientais valdymas, panaudojant IT turizmo agentūroje „Baltic – cliper“." Master's thesis, Lithuanian Academic Libraries Network (LABT), 2009. http://vddb.library.lt/obj/LT-eLABa-0001:E.02~2006~D_20090907_190135-79932.
Full textAbstract:
Nuolat augantis įmonių skaičius, didėjanti konkurencija verčia įmonių vadovus ieskoti būdų, kaip išlikti rinkoje tokiomis sąlygomis. Konkurenciją tarp įmonių aštrina ir nuolat gerėjanti teikiamų paslaugų kokybė bei klientų prioritetų pasikeitimas – vis didesnis dėmesys skiriamas ne tik paslaugos kainai, bet ir kitiems aspektams – klientai tampa vis išrankesni. Tai yra vienos iš pagrindinių priežasčių, skatinančių įmones kurti klientų valdymo ir ryšių su jais strategijas. Tai natūralus kompanijų rūpinimasis savo išlikimu ir konkurentabilumu. Paslaugų teikimo srityje, kaip ir fizinių produktų, vyrauja aštri konkurencija, kuri lemia klientų migracijas nuo vienų paslaugų teikėjų prie kitų.<br>Constantly growing the number of companies’, increasing compete force the head of enterprises to find ways how to stay in market in such conditions. Constantly improving the quality of given services and change of customers priority strain compete between companies’, more attention is given not only to service price but to other aspects – the costumers become more fastidious. This is one of the main reasons, which stimulate companies’ to create customers relationship management. This is natural companies concern of their survive and competition. In given services fields as in physical products dominate sharp competition that decides customers’ migration from one services provider to another.
16
Oda, Pamela Zacharias Sanches. "Vide o clipe = forças e sensações no caos." [s.n.], 2011. http://repositorio.unicamp.br/jspui/handle/REPOSIP/251228.
Full textAbstract:
Orientador: Antonio Carlos Rodrigues de Amorim<br>Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Educação<br>Made available in DSpace on 2018-08-18T09:59:06Z (GMT). No. of bitstreams: 1
Oda_PamelaZachariasSanches_M.pdf: 2739353 bytes, checksum: 0745236c9fb9041f805ae85982a8f120 (MD5)
Previous issue date: 2011<br>Resumo: Os videoclipes, que originalmente eram produções audiovisuais destinadas a fazer a propaganda de um artista, ainda mantêm sua finalidade original, mas, ao longo do tempo, modificaram-se de tal forma que desenvolveram uma linguagem característica e foram a gênese de várias inovações técnicas e narrativas, que fizeram com que perdessem seu caráter de propaganda e assumissem o status de arte. Esta dissertação tem o objetivo de analisar videoclipes como produções artísticas responsáveis por produzir forças geradoras de caos, de mudanças em sua própria estrutura e também no espectador. O indivíduo, ao assistir a um videoclipe, entra em contato com várias imagens e sons que atuam, naquele acontecimento, como forças ativas que podem produzir transformações no eterno devir. Para tais discussões foram utilizados os conceitos de Gilles Deleuze e toda a sua reflexão sobre sentido e acontecimento, bem como foi analisada a obra do francês Michel Gondry, diretor de videoclipes consagrados e responsável pela criação de uma linguagem inventiva e inovadora na produção de videoclipes.<br>Abstract: The music videos, that originally were audiovisuals productions made for artist publicity, still keep their original purpose, but, along of time, they have changed so that developed a characteristic language and were the genesis of many narrative and technical innovations that have made they lost their feature of publicity and took over the status of art. This text have the purpose to analyze the music videos like artistic productions responsible for generate chaos forces, changes in their own structure and also in the spectator. The person, when watch a music video, get in touch with many images and sounds that act, in that happening, like active forces that produces transformations in the eternal devir (emergence). For that discussions, the concepts of Gilles Deleuze were used, just as his considerations about the meaning and the happening, and was analyzed too the work of the renowned French director Michel Gondry, the creator of an inventive and innovative language for the production of music videos.<br>Mestrado<br>Educação, Conhecimento, Linguagem e Arte<br>Mestre em Educação
17
NOGUEIRA, NETO Antonio Vasconcelos. "Variabilidade da Corrente Norte do Brasil associada aos padrões termohalinos na borda da Plataforma Continental Norte do Brasil." Universidade Federal de Pernambuco, 2013. https://repositorio.ufpe.br/handle/123456789/10577.
Full textAbstract:
Submitted by Amanda Silva (amanda.osilva2@ufpe.br) on 2015-03-05T12:25:54Z
No. of bitstreams: 2
Dissertaçao Antonio Nogueira Neto.pdf: 8063802 bytes, checksum: 69353f69d12cfe083f907952ab61afc5 (MD5)
license_rdf: 1232 bytes, checksum: 66e71c371cc565284e70f40736c94386 (MD5)<br>Made available in DSpace on 2015-03-05T12:25:54Z (GMT). No. of bitstreams: 2
Dissertaçao Antonio Nogueira Neto.pdf: 8063802 bytes, checksum: 69353f69d12cfe083f907952ab61afc5 (MD5)
license_rdf: 1232 bytes, checksum: 66e71c371cc565284e70f40736c94386 (MD5)
Previous issue date: 2013<br>Nas últimas décadas, diversos estudos têm utilizado dados de fontes remotas, in situ e/ou modelos matemáticos para descrever processos importantes da circulação oceânica. Na borda Oeste do Oceano Atlântico Equatorial, a concatenação de informações obtidas por dados de fontes distintas permite um melhor esclarecimento da complexa circulação oceânica nesta área. O presente estudo utiliza dados hidrográficos coletados em três campanhas oceanográficas do Programa REVIZEE ao longo da Plataforma Continental Norte do Brasil (PCNB), realizadas em outubro a novembro de 1997; maio a junho de 1999 e julho a agosto de 2001, bem como uma série de 14 anos (janeiro de 1998 a dezembro de 2011) de coleta de dados mensais de Temperatura da Superfície do Mar – TSM, obtidas por meio do satélite Tropical Rainfall Measuring Mission-Microwave Image (TRMM-TMI), como também os resultados do modelo numérico ATL6. Os dados in situ de temperatura, salinidade e corrente foram coletados através de CTD Sea-Bird, modelo SBE9 e perfilador ADCP modelo RDI Broad Band 75kHz, respectivamente. As duas primeiras variáveis, também foram utilizadas para aplicação do método para cálculo da Mudança de Temperatura Acumulada (MTA), para inferir um possível desprendimento de água da camada de fundo da plataforma, associado ao fluxo da Corrente Norte do Brasil (CNB), próximo à quebra da plataforma. Os resultados in situ e numéricos evidenciam a forte presença da CNB junto à quebra da PCNB, com valores em torno de 1,2m.s-1 no núcleo da corrente (~100m de profundidade) para o período de intensificação da mesma (agosto de 2001). A assinatura do núcleo da corrente é notada até aproximadamente 200m de profundidade, tendendo ficar mais intenso e estável enquanto segue para noroeste da foz do rio Amazonas. Os resultados de modelo mostram que em maio a CNB mantém suas principais características do fluxo (direção noroeste e profundidade), porém é bem menos intensa junto à PCNB (~0,6m.s-1). A distribuição de TSM obtida por CTD, assim como as médias mensais obtidas pelo satélite mostram que, no período de julho a setembro, águas relativamente mais frias (<27.5°C) chegam à região através da CNB. Os resultados de TSM do modelo mostram essas mesmas características, mas os valores de temperatura são subestimados pelo mesmo com diferenças em torno 2°C das obtidas porsatélite. Os transectos de temperatura para o mesmo período mostram que toda a camada acima da termoclina apresenta queda nas temperaturas junto à PCNB. Já no período de menor intensidade da CNB e maior descarga do rio Amazonas (maio de 1999) foram observadas águas mais quentes (>28°C) na região, estando associadas ao posicionamento próximo ao Equador da Zona de Convergência Intertropical e presença da pluma de baixa salinidade do rio Amazonas. Os resultados obtidos na distribuição da MTA demonstraram um possível desprendimento de água da camada de fundo da PCNB próximo à isopicna de 23.7kg.m-3, no período compreendido entre julho a agosto de 2001 e outubro a novembro de 1997, sendo que no período de maio a junho de 1999, características de desprendimento são observadas próximo à isopicna de 23kg.m-3. Tais variações na distribuição de MTA apresentaram semelhanças a sudeste e a noroeste da foz do rio Amazonas, em função da presença ou ausência da pluma. Entretanto, os dados indicam que estas características estão relacionadas à CNB, porém independem das variações sazonais da mesma. Os resultados apresentados neste estudo mostram que a CNB contribui para as alterações de temperatura da coluna d’água sobre a termoclina ao longo da PCNB, mas estas alterações estão possivelmente ligadas à sazonalidade da pluma do rio Amazonas sobre a PCNB.
18
Tanahara, Sorayda. "Etude de la circulation dans le Golfe du Mexique et la mer des Caraïbes. Validation des simulations CLIPPER-ATL6 à l'aide des observations CANEK." Paris 6, 2004. http://www.theses.fr/2004PA066313.
Full text
19
Clippard, Maria Sylvia [Verfasser], Andreas [Akademischer Betreuer] Pfnür, and Rianne [Akademischer Betreuer] Appel-Meulenbroek. "Steigerung der Immobilienperformance durch Nutzerorientierung. Möglichkeiten und Grenzen der Performancebewertung von Büroarbeitsplätzen / Maria Sylvia Clippard ; Andreas Pfnür, Rianne Appel-Meulenbroek." Darmstadt : Universitäts- und Landesbibliothek Darmstadt, 2020. http://d-nb.info/1204201013/34.
Full text
20
Guedes, Rogério Luizari. "ELETROCIRURGIA E CLIPES DE TITÂNIO PARA HEMOSTASIA EM PEDÍCULOS OVARIANOS DURANTE OVARIOHISTERECTOMIA VIDEOASSISTIDA COM DOIS PORTAIS EM CADELAS." Universidade Federal de Santa Maria, 2012. http://repositorio.ufsm.br/handle/1/10115.
Full textAbstract:
Conselho Nacional de Desenvolvimento Científico e Tecnológico<br>This study evaluated the use of bipolar electrosurgery and laparoscopic clip
applier with respect to surgical time, blood loss and inflammatory response during
video-assisted ovariohysterectomy with two portals. Two groups (n=10) assessed
each of the hemostatic techniques during castration and a third group (GIII, n=6)
evaluated changes in serum promoted only by the clinical and anesthetic protocols
used in order to exclude the changes made by them. The surgical times, such as the
volume of blood loss were significantly lower in Bipolar Group. The inflammatory
response was significantly higher throughout the evaluation period after surgery, but
no clinical manifestations different than those presented by the Clipador Group.
There were no significant changes in packed cell volume between the groups, but
among the times evaluated it reduced about 10% from initial value until four hours
after the procedure, in the surgical groups and Group III. Both techniques have good
execution by the video-assisted procedure, however, the use of bipolar forceps
allows minor surgical times, minimal blood loss and shorter learning curve for the
surgeon. The bleeding does not result in physiological changes and that one s on
packed cell volume are presented because of the clinical and anesthetic protocols.<br>Este estudo avaliou a utilização da eletrocirurgia bipolar e do clipador
laparoscópico em relação ao tempo cirúrgico, perda sanguínea e resposta
inflamatória durante a ovariohisterectomia videoassistida com dois portais. Dois
grupos (n=10) avaliaram cada uma das técnicas hemostáticas durante as castrações
e um grupo (GIII, n=6) avaliou as alterações séricas promovidas somente pelo
protocolo clínico e anestésico utilizado, a fim de excluir as alterações promovidas por
estes. O tempo cirúrgico, assim como o volume de sangue perdido foram
significativamente menores no Grupo Bipolar. A resposta inflamatória apresentou
valores significativamente maiores durante todo o período de avaliação pósoperatório,
sem manifestações clínicas diferentes das apresentadas pelo Grupo
Clipador. Em relação ao hematócrito não houve alterações significativas entre os
grupos, mas entre os tempos de avaliação reduziu cerca de 10% do valor inicial, até
quatro horas do final do procedimento, tanto nos grupos cirúrgicos como no Grupo
III. Ambas as técnicas são de boa execução através do procedimento videoassistido,
porém, o uso da pinça bipolar permite menores tempos cirúrgicos, sangramento
mínimo e menor curva de aprendizado do cirurgião. O sangramento não acarreta em
alterações fisiológicas e as mudanças apresentadas no hematócrito são
provenientes dos protocolos clínico e anestésico instituídos.
21
Lebee, Pierre. "Mise en œuvre d'une architecture spécialisée pour l'exécution d'un système d'exploitation réparti : Chorus." Compiègne, 1986. http://www.theses.fr/1986COMPI249.
Full textAbstract:
Une nouvelle génération de systèmes d'exploitation est née durant ces dix dernières années : les systèmes d'exploitation répartis. Trois concepts fondamentaux ont été étudiés : la standardisation, la répartition et le parallélisme. CHORUS fait parti de ces systèmes. Ce projet a été développé à l'INRIA, une architecture pour des systèmes répartis a été réalisée. CHORUS offre une compatibilité UNIX, et est indépendant de l'architecture matérielle des machines et des réseaux sur lesquels il est implanté. Cette thèse présente une architecture d'ordinateur complète à base de Transputers et de Clippers adaptée à CHORUS. Ce projet est développé à l'UTC dans la division IlS. La caractéristique principale de cette machine réside dans le fait que le système d'exploitation est exécuté sur un processeur qui lui est dédié : le Transputer. Les tâches des utilisateurs sont exécutées sur le Qipper. Ces deux processeurs sont appelés : processeur Hétérogène Parallèle et Réparti (HPR). La Machine HPR (MHPR) est modulaire et se compose de cinq processeurs HPR. Les Transputers sont connectés entre eux de façon optimale par leurs lignes séries, évitant ainsi les problèmes d'encombrements dus à un bus commun. Les Clippers disposent d'une mémoire locale partagée accessible par leur bus privé, ou par le bus commun. Un troisième bus est utilisé pour le DMAC réalisant les opérations d'E/S (disque, ETHERNET, X2S) et pouvant accéder à toutes les mémoires locales partagées de la machine et à toutes les mémoires privées des Qippers. Ce bus permet d'effectuer les opérations d'BIS sans détériorer la bande passante du bus commun. Les MHPR peuvent être connectées ensemble par des réseaux ETHERNET ou X25<br>A new generation of operating systems is born during the last ten years : distributed operating system oriented network. Three key-concepts are strongly developed : standardization, distribution and parallelism. One of these systems is CHORUS (TM). This project launched at INRIA, has elaborated an architecture far distributed systems. CHORUS offers a UNIX compatibility, is independent of the hardware architecture and of networks. This paper describes a complete computer architecture fitted to CHORUS, based on transputers and Clippers. The project is developed at UTC in the IlS department. The major feature of the machine lays on the fact that the operating system is executed by a dedicated processor : the Transputer. User's tasks are executed on a Clipper. These two processors are called a Heterogeneous Parallel Distributed processor (HPD). The HPD Machine (HPDM) is modular and may be composed of rive HPD processors. Transputers are fully connected by their serial links, avoiding bus bottlenecks. Clippers have a local shared memory accessible by their private bus, or by a global bus. A third bus is used by the DMAC supporting l/0 operations (disk, ETHERNET, X2S) and accessing the local shared memories and Clipper's private memories. This bus permits l/O operations without decreasing global bus bandwidth. HPDMs may be connected together by ETHERNET or X25 network
22
Guyon, Clotilde. "Contrôle post transcriptionnel des transcrits des auto-antigènes induits par AIRE dans le thymus." Thesis, Sorbonne Paris Cité, 2016. http://www.theses.fr/2016USPCB138/document.
Full textAbstract:
La tolérance immunologique assure le maintien de l’intégrité des organismes contre les pathogènes tout en respectant les constituants du soi. La dérégulation de ce mécanisme entraîne la survenue de maladies autoimmunes qui touchent de 5 à 10% de la population générale. Un mécanisme clé de la tolérance immunologique est la délétion clonale des lymphocytes T auto-réactifs après qu’ils ont reconnu leur antigène spécifique au cours de leur maturation dans le thymus. Il a été montré qu’un vaste répertoire d’autoantigènes est exprimé par les cellules épithéliales médullaires du thymus (mTECs) sous l’action de la protéine AIRE (AutoImmune Regulator). Les études présentées dans ce travail participent à améliorer la compréhension du fonctionnement de AIRE. Au-delà de la fonction de transactivation de AIRE, nous avons montré, avec le reséquençage à haut débit (RNAseq) des mTECs, que les transcrits des autoantigènes induits par AIRE ont des extrémités 3’UTRs courtes associées à l’utilisation des sites de polyadénylation (pA) alternatifs. Nous avons identifié par analyse de données de CLIPseq une fixation préférentielle du complexe de terminaison de la transcription au niveau des pAs alternatifs des gènes sensibles à AIRE. Nous avons également mis en évidence l’interaction de AIRE au complexe de terminaison de la transcription. Parmi plusieurs partenaires de AIRE associés à ce complexe, nous avons montré par interférence d’ARN et RNAseq le rôle de CLP1 dans le choix des pAs alternatifs. De plus nous montrons que CLP1 est le seul membre du complexe de terminaison à être préférentiellement exprimé dans les mTECs matures. Fonctionnellement, nous avons mis en évidence une stabilité plus importante pour les transcrits des autoantigènes induits par AIRE en bloquant la transcription des mTECs ex-vivo par traitement à l’Actinomycine D. Nous montrons également l’existence d’un raccourcissement 3’UTR général dans les mTECs matures par rapport aux mTECs immatures et autres tissus de la souris, auquel se combine le raccourcissement spécifique des gènes dépendant de AIRE. Après avoir identifié par des analyses de Gene Ontology une activité cellulaire exacerbée dans les mTECs matures vs immatures, nous confirmons l’activité transcriptionnelle exacerbée des mTECs matures in-vivo grâce à l’incorporation de 5Ethynyl Uridine (EU) dans les ARN néosynthétisés après injection intrathymique. Le raccourcissement des transcrits des auto-antigènes associé à leur stabilité accrue suggère qu’ils échappent à la répression transcriptionnelle médiée par les microARNs. Ce travail a permis d’identifier les bases moléculaires de la régulation post-transcriptionnelle des autoantigènes dans le thymus. Dans l’étude faite en collaboration avec l’équipe de Jakub Abramson du laboratoire Weizmann, démontre que Sirt1, une désactylase ADN dépendante, est exprimé de façon abondante dans les mTEC AIRE+ et ce grâce à l’utilisation de profil d’expression génétique, de cytométrie en flux et d’analyses d’immunoblot de différents types cellulaires thymiques. De plus lorsque Sirt1 est inactivé, dans les lignées germinales et des lignées TEC, l’expression des gènes AIRE dépendants diminuent et donc avec elle la tolérance immune induite par AIRE. La capacité désacétylase de Sirt1 est nécessaire pour l’expression des gènes induits par AIRE dans les mTECs. Sirt1 cible surement d’autres molécules nucléaires, impliquées dans la voie de AIRE. Elle pourrait avoir un rôle plus étendu dans la régulation du système immunitaire et être présent à la périphérie. Cette étude a mis en évidence un rôle important de Sirt1 dans la tolérance centrale dans le thymus à travers la régulation des gènes induits par AIRE. (...)<br>No abstract
23
Ceron, Carla Speroni. "Tratamento crônico com nebivolol atenua o remodelamento vascular hipertrófico da hipertensão renovascular 2-rins, 1-clipe." Universidade de São Paulo, 2012. http://www.teses.usp.br/teses/disponiveis/17/17133/tde-20052014-151253/.
Full textAbstract:
A hipertensão arterial é uma condição clínica grave acompanhada por alterações estruturais do aparelho cardiovascular. Os antagonistas dos receptores 1-adrenérgicos são drogas usadas na terapêutica anti-hipertensiva. O nebivolol é um antagonista seletivo dos receptores 1 de terceira geração, que estimula a liberação endotelial de NO e diminui a ativação da -nicotinamida adenosina dinucleotído fosfato (NAD(P)H) oxidase. O metoprolol é um antagonista seletivo dos receptores 1de segunda geração, que não apresenta efeitos vasodilatadores. As metaloproteinases da matriz (MMPs), principalmente a MMP-2, são enzimas que participam ativamente do processo de remodelamento vascular. Elas passam de seu estado latente para seu estado ativo pela ação de proteases e espécies reativas de oxigênio (EROs). Como na hipertensão há aumento de EROs, de MMPs e remodelamento vascular, é possível que o nebivolol impeça o aumento dos níveis de MMPs vasculares e o remodelamento vascular hipertrófico associados à hipertensão, além do seu efeito de antagonismo do receptor 1. Primeiro, realizamos uma avaliação das alterações aórticas da hipertensão 2-rins,1-clipe (2R-1C), pois há poucas informações sobre essas alterações durante o desenvolvimento da hipertensão. Para isso, ratos hipertensos e controles foram estudados com 2, 4, 6 e 10 semanas após a indução da hipertensão. A pressão arterial sistólica foi monitorada semanalmente. As alterações na parede aórtica foram estudadas em hematoxilina/eosina (H&E), picrosirius e orceína. Foram avaliados também a atividade da NAD(P)H oxidase, a produção de ânion superóxido, a atividade gelatinolítica por zimografia in situ; os níveis e localização de MMP-2, MMP-14 e TIMP-2 por imunofluorescência zimografia e imunohistoquímica. No segundo protocolo, após 6 semanas de hipertensão foi iniciado o tratamento com metoprolol (Meto -20/mg/kg/dia) ou nebivolol (Nebi -10mg/kg/dia), realizado durante 4 semanas. Foram avaliados a pressão arterial sistólica, as alterações na parede aórtica por H&E, a atividade da NAD(P)H oxidase, produção de ânion superóxido, a atividade gelatinolítica, os níveis e localização de MMP-2 por imunofluorescência e zimografia em gel, e os níveis de nitrotirosina por imunohistoquímica. Observamos no protocolo temporal que a pressão foi gradualmente aumentada nos animais hipertensos quando comparado aos controles. Houve hiperplasia e hipertrofia da aorta, com aumento da deposição de colágeno e elastina. Observamos aumento nos níveis de estresse oxidativo, MMPs e atividade gelatinolítica em todas as semanas de estudo. Ao final do tratamento com metoprolol e nebivolol, observamos que a pressão diminuiu nos animais hipertensos, e que essa redução da pressão ocorreu de modo semelhante com os diferentes tratamentos. Os animais hipertensos apresentaram hipertrofia da aorta, aumento nos níveis de EROs, de MMP-2 e da atividade gelatinolítica. Essas alterações foram revertidas apenas pelo tratamento com nebivolol, mas não pelo metoprolol. Assim, o remodelamento da hipertensão 2R-1C parece estar estabelecido com duas semanas de hipertensão arterial, com elevados níveis de espécies reativas de oxigênio e MMPs, e o tratamento com nebivolol, mas não o metoprolol, atenuou o estresse oxidativo e o remodelamento vascular associado à hipertensão.<br>Hypertension is a serious clinical condition with structural changes in the cardiovascular system. Beta-adrenoreceptor antagonists are used in hypertension therapy. Nebivolol is a third-generation selective 1-adrenoreceptor antagonist that stimulates endothelial cell NO production and prevents vascular NAD(P)H oxidase activation. Metoprolol is a second-generation selective 1-adrenoreceptor antagonist, without vasodilatory effect. The matrix metalloproteinases (MMPs), especially MMP-2, participate actively in the vascular remodeling process, and are activated by reactive oxygen species (ROS). There are increases in ROS, of MMPs, and vascular remodeling in hypertension. Because of these, it´s possible that nebivolol prevent MMP increases and vascular remodeling associated with hypertension beyond its 1-receptorblocking properties. First, structural aortic changes in the development of two-kidney, one-clip hypertension (2K-1C) were evaluated. Sham or 2K1C hypertensive rats were studied after 2, 4, 6, and 10 weeks of hypertension. Systolic blood pressure (SBP) was monitored weekly. Morphometry of structural changes in the aortic wall was studied in hematoxylin/eosin, orcein and picrosirius red sections. Aortic NAD(P)H activity and superoxide production was evaluated. Aortic gelatinolytic activity was determined by in situ zymography, and MMP-2, MMP-14, and tissue inhibitor of MMPs (TIMP)-2 levels were determined by gelatin zymography, immunofluorescence and immunohistochemistry. Six weeks after surgery, hypertensive and sham rats were treated with metoprolol (20 mg/kg/ day) or nebivolol (10 mg/kg/day), for four weeks, in the second-protocol. Systolic blood pressure (SBP) was monitored weekly Aortic structural were studied in hematoxylin/eosin sections. NAD(P)H oxidase activity and ROS and nitrotyrosine production were evaluated. MMPs levels and activity were determined by zymography and in situ zymography. In the temporal study, 2K-1C hypertension was associated with increased aortic collagen and elastin content in the early phase of hypertension, which was associated with vascular hypertrophy, increased vascular MMPs levels, and increased gelatinolytic activity, possibly as a result of increased vascular NAD(P)H oxidase activity and oxidative stress. In the second-protocol, similar reductions in SBP were found with both metoprolol and nebivolol treatments. However, only Nebi reversed aortic hypertrophy, the increases in aortic NAD(P)H oxidase activity, in aortic ROS levels, in nitrotyrosine staining, in aortic MMP-2 levels and in aortic MMP activity. These results indicate that vascular remodeling of renovascular hypertension is an early process associated with increases in MMPs activities, enhanced matrix deposition and oxidative stress, and that treatment with Nebi attenuate the oxidative stress and the vascular remodeling associated with 2K-1C hypertension.
24
Ribeiro, Rosane Aparecida. "Avaliação da função reprodutiva em ratas submetidas ao clampeamento da artéria renal esquerda modelo 2 rins/1 clipe." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2006. http://hdl.handle.net/10183/5868.
Full textAbstract:
No modelo de hipertensão renovascular, a redução do fluxo sangüíneo para o rim causada pela aplicação de um clipe na artéria renal, modelo 2 Rins/ 1 Clipe (2R/1C), leva à secreção de renina e um aumento secundário na concentração de angiotensina II (Ang II) periférica, que tem papel na elevação da pressão arterial. Além de seu efeito vasopressor a Ang II tem envolvimento na fisiologia reprodutiva. A Ang II está envolvida na regulação da secreção do hormônio liberador do hormônio luteinizante (LHRH), ovulação, e comportamento sexual em ratos machos e fêmeas. Nosso objetivo nesse trabalho foi analisar a regularidade do ciclo estral após a implantação do clipe, o comportamento sexual, peso ovariano, ovulação, como também, verificar as concentrações plasmáticas de estradiol, hormônio luteinizante (LH) e hormônio folículo estimulante (FSH) durante a tarde do proestro em ratas submetidas ao modelo 2R/1C. Dos animais clipados, em torno de 55% apresentaram pressão arterial sistólica (PAS) maior que 150 mmHg, dessa forma os animais neste estudo foram divididos em três grupos: grupo de ratas FICT (submetidas à cirurgia fictícia), grupo 2R/1C (fêmeas submetidas à laparotomia, com dissecação da artéria renal esquerda, para a implantação de um clipe de prata de 0,15mm de diâmetro, e que apresentavam PAS <125 mmHg), e 2R/1C-H (fêmeas submetidas ao modelo 2R/1C e que apresentavam PAS >150 mmHg). O sangue foi centrifugado, o plasma coletado foi destinado ao radioimunoensaio para estradiol, LH, e FSH. Ao final das coletas as ratas retornaram ao biotério, e na manhã seguinte (fase estro), tiveram os ovários coletados, pesados separadamente, e em seguida foi realizada a contagem do número de óvulos. Os resultados mostraram que ratas 2R/1C-H e 2R/1C apresentam um maior tempo, em dias, para o retorno às mudanças de fases do ciclo estral, após a cirurgia. Ratas 2R/1C-H apresentaram redução na freqüência de lordose e um menor quociente de lordose (Freqüência de lordose/Freqüência de monta). Foi verificada redução no número de óvulos nos animais 2R/1C-H e 2R/1C quando comparado ao grupo FICT. As concentrações plasmáticas de estradiol e FSH na tarde do proestro não foram diferentes entre os grupos, porém a concentração plasmática de LH no grupo hipertenso foi menor às 16:00h em relação ao demais grupos. A redução no número de óvulos em ratas 2R/1C-H e 2R/1C, na fase estro, foi confirmada no experimento II, porém esta não foi acompanhada por alteração no peso do ovário direito e esquerdo. Em conjunto nossos resultados demonstraram que ratas 2R/1C-H apresentam redução na capacidade reprodutiva, que não foi associada a alterações nas concentrações plasmáticas de estradiol e FSH, mas sim a uma modificação do perfil da curva de secreção de LH na tarde do proestro. Sugere-se que a redução na função reprodutiva verificada seja devido ao aumento de Ang II e/ou elevação da pressão arterial.
25
Silva, Tales Candido Garcia da 1987. "Análise tridimensional por elementos finitos do comportamento biomecânico de overdenture com sistema barra-clipe reembasada com material permanente macio ou rígido." [s.n.], 2013. http://repositorio.unicamp.br/jspui/handle/REPOSIP/288543.
Full textAbstract:
Orientador: Rafael Leonardo Xediek Consani<br>Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Odontologia de Piracicaba<br>Made available in DSpace on 2018-08-22T06:41:00Z (GMT). No. of bitstreams: 1
Silva_TalesCandidoGarciada_M.pdf: 2333954 bytes, checksum: ce4e52cbe9b7265639ebc9bf9cbdb40b (MD5)
Previous issue date: 2013<br>Resumo: O processo de reabsorção do osso mandibular e do peri-implantar promove desadaptação das bases protéticas, causando aumento das tensões geradas pelas próteses e componentes, exacerbando a reabsorção óssea. Com o intuito de readaptar bases protéticas ao rebordo subjacente, o uso de reembasadores tem sido indicado. O objetivo neste trabalho foi analisar pelo método de Elementos Finitos as tensões no osso peri-implantar, rebordo posterior e componente protéticos em overdenture com reabsorção óssea simulada (na instalação da prótese, 3, 5 e 10 anos de uso) e reembasamento com materiais permanentes macio ou rígido. Foi utilizado software específico para modelagem (SolidWorks 2010) para a geração tridimensional dos componentes protéticos e base da mandíbula. Foram gerados quatro modelos mandibulares, que simulavam as perdas ósseas do rebordo posterior e peri-implantar, de acordo com os tempos avaliados neste estudo e com ou sem o uso de reembasadores macios ou rígidos. Os modelos por Elementos Finitos foram obtidos com a exportação dos modelos sólidos para software específico de simulação mecânica (ANSYS Workbench 11), com carga de 100 N na região do primeiro molar direito. O modelo que simula o momento da instalação da prótese gerou os menores resultados de tensão para todos os componentes e situações analisadas. A distribuição de tensões nos modelos com 3, 5 e 10 anos de reabsorção foi semelhante quando se avaliou a localização das tensões; entretanto, maior acúmulo foi verificado nos componentes protéticos e tecido ósseo, sempre ao lado de aplicação da carga. Quanto mais tempo de reabsorção, maiores eram os valores de tensão gerados, com influência dos materiais reembasadores que diminuíram os valores tensionais. Materiais reembasadores rígidos promoveram melhor distribuição e menores valores de tensão que reembasadores macios, sendo mais eficientes que os modelos sem material reembasador. Conclui-se que: a) o aumento da reabsorção dos rebordos posterior ou peri-implantar promoveu aumento de tensões tanto nos componentes protéticos como no tecido ósseo; b) o uso de reembasadores macio ou rígido atenuou as tensões geradas, qualquer que fosse à resiliência do material; c) o reembasador rígido foi mais eficiente na diminuição das tensões quando comparado ao reembasador macio<br>Abstract: The process of ridge posterior and peri-implant bone resorption promotes misfit between overdenture base and mandibular ridge, which culminates in increased stresses generated by prostheses and their components, exacerbating bone resorption. Relines have being used in order to readapt the prosthetic bases. This three-dimensional finite elements method study aimed to evaluate the effect stress of a overdenture in models that simulated bone resorption (in installing prosthesis, 3, 5 and 10 years of use) and reline materials (soft or hard) on stress distribution in posterior ridge, surrounding bone and implant prosthetic components. Through the computer aided design software (SolidWorks 2010), three-dimensional prosthetic components were built and jaw models from images of the mandible computerized tomography. Four models were generated simulating mandibular bone loss according to times and use of hard or soft relines. These geometric models were obtained through export to the specific mechanical simulation software (ANSYS Workbench 11), and subjected to a load of 100 N in the first right molar region. The lowest observed values were in the period of installation prosthesis for all components and situations. The stress distributions in models with 3, 5 and 10 years of resorption were similar considering the location of tensions; however, the stress concentration increased values in the prosthetic components and bone, always on the side of load application. The longer resorption, the higher stress values were generated, with the Influence of reline materials. Hard reline materials promoted better distribution and lower stress values than soft reline, demonstrating models with more effectiveness than in with no reline. It can be concluded that: a) the power increase of posterior ridge or peri-implant bone resorption promotes increased tensions in the prosthetic components in the bone tissue, b) the use of soft or hard relines, minimized the generated tensions, regardless the stuff resilience, c) the hard reline was more efficient in reducing tensions when compared to soft reline<br>Mestrado<br>Materiais Dentarios<br>Mestre em Materiais Dentários
26
Caetano, Conrado Reinoldes 1988. "Influência da inclinação do implante na distribuição de tensões em sistema de retenção de overdentures tipo barra-clipe com desajuste vertical." [s.n.], 2014. http://repositorio.unicamp.br/jspui/handle/REPOSIP/290325.
Full textAbstract:
Orientadores: Rafael Leonardo Xediek Consani, Mateus Bertolini Fernandes dos Santos<br>Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Odontologia de Piracicaba<br>Made available in DSpace on 2018-08-24T08:13:00Z (GMT). No. of bitstreams: 1
Caetano_ConradoReinoldes_M.pdf: 1244825 bytes, checksum: e99a928da45883acc1a5cc2ace6699fd (MD5)
Previous issue date: 2014<br>Resumo: O objetivo neste estudo foi avaliar a distribuição de tensões em overdentures com sistema de retenção tipo barra-clipe apresentando diferentes inclinações dos implantes, desajuste vertical e material da barra. Para isso foram confeccionados modelos tridimensionais de mandíbula e overdenture fixada por dois implantes com sistema de retenção barra-clipe que foram modelados com software específico (SolidWorks 2010) ... Observação: O resumo, na íntegra, poderá ser visualizado no texto completo da tese digita<br>Abstract: The aim of this study was evaluate the stress distribution in overdentures with a bar-clip retention system presenting different implant inclinations, vertical misfit, and framework materials. Three-dimensional models of a jaw, an overdenture retained by two implants and a bar-clip attachment were modeled using specific software (SolidWorks 2010) ... Note: The complete abstract is available with the full electronic document<br>Mestrado<br>Protese Dental<br>Mestra em Clínica Odontológica
27
Mezzalira, Giovani Waltrick. "Bloqueio simpático do t3t4 com clipes de titânio versus simpatectomia do t3t4 por ablação para o tratamento da hiperidrose axilar / Giovani Waltrick Mezzalira ; orientador, Marlos de Souza Coelho." reponame:Biblioteca Digital de Teses e Dissertações da PUC_PR, 2011. http://www.biblioteca.pucpr.br/tede/tde_busca/arquivo.php?codArquivo=2223.
Full textAbstract:
Dissertação (mestrado) - Pontifícia Universidade Católica do Paraná, Curitiba, 2011<br>Bibliografia: f. 39-43<br>INTRODUÇÃO: o suor em excesso localizado nas regiões plantares, palmares, crâniofaciais e axilares é uma doença chamada hiperidrose primária (HP). Esta doença apresenta diferentes níveis de fobia social. O tratamento mais conhecido é a vídeocirurgia sobre<br>INTRODUCTION: excessive sweating of plantar, palmar, craniofacial and axillary regions is a disease known as Primary Hyperhidrosis (PH). This disease has different levels of social phobia. The best known treatment for this disease is the videoassisted sur
28
Molmeret, Yannick. "Mise en forme par extrusion de polymères fonctionnels conducteurs protoniques : polysulfones sulfones/liquides ioniques : application dans le domaine des piles à combustible." Grenoble INPG, 2010. http://www.theses.fr/2010INPG0040.
Full textAbstract:
Les travaux réalisés dans le cadre de cette thèse s’inscrivent de manière plus générale dans le projet CLIPPAC financé par le « plan d’action national pour l’hydrogène » (PAN-H) en 2005. Ce projet ambitieux réunissait neuf laboratoires et un industriel pour tenter de passer outre un des principaux verrous qui s’opposent au développement des piles à combustible à membrane polymère (PEMFC) : la température de fonctionnement. Pour ce faire, le développement de nouveaux matériaux est une piste ambitieuse, mais qui permet à la fois de viser une augmentation de la résistance thermique des polymères, et également d’envisager de façon plus globale la réduction de leur prix de fabrication ainsi que leur mode de mise en forme. La piste que nous avons explorée dans ces travaux s’intéresse à l’utilisation conjointe d’un conducteur liquide ionique protique (CLIP) inséré dans une membrane polymère également conductrice, à base de polysulfone sulfoné (PSuS). Le CLIP a pour but de doper la conductivité du matériau, tandis que la membrane polymère assurera la tenue mécanique de l’ensemble. L’étude des CLIPs a permis d’identifier des paramètres influençant leurs propriétés électrochimiques, tels que la taille de l’anion ou la force de l’acide utilisé. Le mode de mise en forme des membranes est également innovant, puisque nous avons pu fabriquer des membranes par extrusion. Ce procédé est courant dans l’industrie pour les polymères de grande consommation, mais peut rarement être utilisé pour des polymères de haute technologie qui sont le plus souvent dégradés pendant la mise en forme. Le procédé que nous avons pu valider consiste à mettre en forme la membrane en une seule étape, en utilisant le CLIP comme plastifiant permanent du PSuS<br>The research presented here was conducted in the CLIPPAC project that was a part of the national French project National Plan for Hydrogen (PAN-H) in 2005. This ambitious study was conducted between nine labotaries and an industrial partner, with the objective of finding an innovative solution to one of the main obstacles found in the PEMFC development : the working temperature. New material development that could be used in high temperature PEMFC is ambitious, but it would allow to increase the thermal resistance of the polymers used and at the same time would allow us to try to decrease the price of such material by integrating the question of their elaboration and processing in the same study. The path we followed consists in the joint used of Protonic Conductive Ionic Liquids (PCILs) incorporated in a conductive polymer membrane made of sulfonated polysulfone (SPSu). The PCIL should boost the conductivity of the material, while the polymeric membrane will maintain good mechanical properties. The PCILs study showed that different parameters are linked to good conductivity performances, such as the anion strength and size. We then chose to use the extrusion process to produce the membrane. This process well used in the polymers industry is innovative in the field of high properties polymers, since it is hard to maintain the polymers properties throughout the extrusion. The modus operandi we chose was to use the PCIL as a permanent aid-process plasticizer that allows us to produce in a single operation a membrane filled with a conductive ionic liquid
29
Barreto, Rodrigo Ribeiro. "Parceiros no clipe: a atuação e os estilos autorais de diretores e artistas musicais no campo do videoclipe a partir das colaborações Mondino/Madonna e Gondry/Björk." reponame:Repositório Institucional da UFBA, 2012. http://www.repositorio.ufba.br/ri/handle/ri/5210.
Full textAbstract:
Submitted by Pós-Com Pós-Com (pos-com@ufba.br) on 2012-01-22T03:25:40Z
No. of bitstreams: 1
Rodrigo-Ribeiro-Barreto.pdf: 2572342 bytes, checksum: 2be96b9328a3440457fac46ebaefdcea (MD5)<br>Made available in DSpace on 2012-01-22T03:25:40Z (GMT). No. of bitstreams: 1
Rodrigo-Ribeiro-Barreto.pdf: 2572342 bytes, checksum: 2be96b9328a3440457fac46ebaefdcea (MD5)<br>Em cerca de três décadas de desenvolvimento dos videoclipes, a colaboração entre
artistas musicais e diretores vem ampliando as possibilidades artístico-expressivas do
formato, que foi originalmente concebido para função divulgatória. Parcerias entre
realizadores das instâncias performática e diretiva resultaram em clipes com êxito estético, visibilidade e repercussão duradouras, além de reconhecimento advindo de instâncias específicas de consagração. O presente trabalho procura investigar a incidência da atuação de cantores/bandas e diretores no campo de produção do formato sobre a definição de estilos autorais nos vídeos musicais. Com base na contribuição teórica de Pierre Bourdieu, a tese propõe a caracterização do campo do videoclipe, um espaço de disputas no qual determinados realizadores pleiteiam e alcançam o poder de gestão de sua própria criação, mesmo em um contexto de produção coletiva inserido na indústria do entretenimento. Essa habilidade de exercer o controle da elaboração dos clipes é fruto da trajetória social de artistas musicais e diretores, durante a qual
esses realizadores incorporam um sistema de estruturas cognitivas, disposições e gostos
(habitus) e acumulam recursos diversos (capitais) necessários e convenientes à atuação no campo específico. Através da retomada histórica do contexto produtivo do formato e de seus principais agentes, foi proposta ainda uma classificação das distintas gerações de diretores de clipes.
Buscou-se demonstrar que o domínio de alguns realizadores durante a produção e as
relações forjadas no campo do videoclipe entre determinados artistas musicais e diretores possibilitam a conformação de estilos passíveis de serem evidenciados no exercício analítico de conjuntos videográficos. Como a perspectiva autoral desenvolvida foi concebida como uma mediação entre contexto e texto, o trabalho articula a inspiração bourdieusiana com abordagens poéticas voltadas para os modos de construção e programação de efeitos em obras
expressivas. A identificação estilística dos videoclipes apresenta-se como uma tarefa abrangente. A começar pela observação da relevância do estilo de um clipe na demarcação de atratividade e singularidade, estímulos indispensáveis para o destaque da obra na concorrida exibição televisiva. São descritos e analisados no formato: 1) os modos de organização interna que
diferenciam um recurso, tema ou efeito de um clipe em traço de estilo, 2) a afirmação
estilística de realizadores com o passar do tempo e 3) os graus de coexistência, síntese ou concorrência entre artistas musicais e diretores nos clipes. Definiu-se ainda uma tipologia dos estilos de performances videoclípicas, que põe em relevo as contribuições dos artistas musicais no formato. A tese traz a análise da totalidade dos vídeos musicais criados pelas parcerias
estabelecidas entre a cantora Madonna e o diretor Jean-Baptiste Mondino – 6 (seis) clipes – e entre a cantora Björk e diretor Michel Gondry – 7 (sete) clipes. No enquadramento proposto, comparam-se tais videoclipes e seus autores com outras obras e realizadores para identificar quais os elementos da trajetória desses profissionais na história do campo do videoclipe
permitiriam ao analista reconhecer e interpretar seus estilos textuais.
30
Zen, Bruno Massucato 1990. "Efeito do desajuste marginal e do pilar protético nas tensões induzidas ao sistema barra-clipe e na força de destorque dos parafusos protéticos : Effect of misfit and prosthetic abutments on straind induced in overdenture-retaining system and in loosening torque of prosthetic screw." [s.n.], 2014. http://repositorio.unicamp.br/jspui/handle/REPOSIP/287798.
Full textAbstract:
Orientadores: Marcelo Ferraz Mesquita, Juliana Maria Costa Nuñez-Pantoja<br>Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Odontologia de Piracicaba<br>Made available in DSpace on 2018-08-24T18:20:55Z (GMT). No. of bitstreams: 1
Zen_BrunoMassucato_M.pdf: 1546130 bytes, checksum: fc57f5ffe80d1ffb71f0ca849815f9ad (MD5)
Previous issue date: 2014<br>Resumo: O assentamento passivo de infraestrututuras protéticas é considerado essencial para a longevidade do tratamento reabilitador sobre implantes dentários. O objetivo neste estudo foi analisar o desajuste vertical decorrente da fundição em Ti cp de barras de Overdentures; avaliar as tensões induzidas e torque de afrouxamento do parafuso protético, em infraestruturas protéticas passivas e não-passivas. Foram fundidas vinte barras em Ti cp, retidas por dois implantes, utilizando-se dois tipos de pilares (UCLA e MP), sobre as quais foram avaliadas, utilizando-se microscópio óptico, as desadaptações marginais inerentes à fundição. A quantificação do desajuste seguiu o protocolo do teste do parafuso único (32 Ncm e 10 Ncm). Foram confeccionados 20 index(10 para cada pilar).Os desajustes foram padronizados com a interposição de um anel metálico de 200 µm entre o análogodo pilar A e o cilindro protético. Nesses index, foram avaliados os níveis de desajuste marginal, seguindo o mesmo protocolo utilizado para análise dos desajustes pós-fundição. As aferições das tensões foram realizadas através de extensômetros elétricos fixados aos análogos, após o retorque dos parafusos protéticos. A força necessária para o torque de afrouxamento dos parafusos protéticos de titânio foi medida com torquímetro digital de precisão de 0,1 Ncm. Os resultados foram analisados estatisticamente (ANOVA, teste t (? = 0,05), Correlação de Pearson). Foi encontrada diferença estatística entre os grupos passivos e não-passivos para: porcentagem do torque de afrouxamento (UCLA, p = 0,0087; MP, p = <0,0001); tensão média (MP, p = 0,0192) independente da adaptação e entre as barras desadaptadas (p = 0,0001) qualquer que fosse o pilar utilizado. A correlação de Pearson indicou correlação positiva entre: desajuste x destorque (UCLA, r = 0,6503 e p = 0,0019; MP, r =0,7338 e p = 0,0002);torque de afrouxamento x tensão para UCLA ( r = 0,5373 e p = 0,0145); desajuste e tensão (r = 0,5678 e p = 0,0001). Pode-se concluir que os parafusos protéticos apresentam maior afrouxamento em próteses não passivas. Infraestruturas protéticas desadaptadas induzem maiores níveis de tensão e desajuste vertical quando comparadas com infraestruturas passivas. Pilares UCLAs mostraram os melhores resultados próteses não passivas.Tensão, desajuste vertical e torque de afrouxamento foram fatores correlacionados<br>Abstract: The passive fit of prosthetic frameworks is considered essential to the longevity of rehabilitation treatment on dental implants.The aim of this study was to analyze vertical misfit of overdentures bars casted in Ti cp; measure the strain, vertical misfit and loosening torque of prosthetic screws, in passive and non-passive frameworks. Twenty bars were casted with Ti cp, retained by two implants, using two types of abutments (UCLA and MA), on which they were evaluated using an optical microscope comparison, the marginal misfit inherent of casting. The misfit quantification followed the protocol of single-screw test (32 Ncm and 10 Ncm). Twenty index were manufactured (10 for each abutment). The misfit were standardized by interposing a metal ring of 200 µm between pilar A abutment and prosthetic cylinder. In the index were evaluated the misfit level, following the same protocol used for measure after casting, and the loosening torque. The measurements of strain were made by strain gauges fixed in the replicas, after retorque of prosthetic screws. The loosening torque of prosthetic screws was evaluated using a digital torque meter with 0.1 Ncm of precision. The results were statistically analyzed (ANOVA, test t, Pearson correlation). Statistical difference was found between passive and non-passive groups: for vertical misfit (p< 0.0001 for both abutments); percentage of loosening torque (UCLA, p = 0.0087; MA, p = <0.0001); mean strain (MA, p = 0.0192) independently of passivity and between the bars desadapted (p = 0.0001) regardless the abutment used. Pearson's correlation (? = 0.05) indicated a positive correlation between: misfit x loosening torque (UCLA, r = 0.6503 e p = 0.0019; MA, r =0.7338 e p = 0.0002); loosening torque x strain for UCLA ( r = 0.5373 e p = 0.0145); misfit x strain (r = 0.5678 e p = 0.0001). It can be concluded: the prosthetic screws have a higher tendency for loosening in ill-fitting prostheses; non-passive frameworks induce higher levels of strain and vertical misfit compared with passive frameworks; UCLA abutments showed the better results in non-passive prostheses; strain, vertical misfit and loosening torque were correlated factors<br>Mestrado<br>Protese Dental<br>Mestre em Clínica Odontológica
31
Nogueira, Moises da Costa Ferraz 1989. "Avaliação por elementos finitos de tensões ocorridas em diferentes seções transversais do sistema de retenção de overdenture tipo barra-clipe com desajuste vertical : Evaluation by finite element analysis of stress at different cross-sections design of overdenture's bar framework with vertical misfit." [s.n.], 2014. http://repositorio.unicamp.br/jspui/handle/REPOSIP/288565.
Full textAbstract:
Orientadores: Rafael Leonardo Xediek Consani, Mateus Bertolini Fernandes dos Santos<br>Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Odontologia de Piracicaba<br>Made available in DSpace on 2018-08-24T21:15:14Z (GMT). No. of bitstreams: 1
Nogueira_MoisesdaCostaFerraz_M.pdf: 1749031 bytes, checksum: 8fa4481a045e127aabb629294129a5b0 (MD5)
Previous issue date: 2014<br>Resumo: O objetivo neste estudo foi avaliar por meio da análise por elemento finito 3-D, as tensões ocorridas em overdentures com sistemas de retenção barra-clipe, quando diferentes formas da seção transversal (circular, ovóide ou Hader) apresentam diferentes níveis de desajuste vertical (50, 100 e 200 µm) e são confeccionadas com diferentes ligas metálicas (Au tipo IV, Ag-Pd, Co-Cr e Ti cp). Modelos tridimensionais foram feitos utilizando software para modelagem 3-D (SolidWorks 2010) e importados para o software de simulação mecânica (ANSYS Workbench 11). Aperto simulado do parafuso foi realizado até obter assentamento adequado entre infraestrutura e plataforma protética. As análises foram realizadas com o objetivo de obter as tensões Máxima Principal e de von Mises (MPa). Os valores da tensão aumentaram com o aumento do desajuste vertical, assim como a barra Hader proporcionou os maiores valores. Barras circulares feitas com Au tipo IV causaram os menores valores na barra e no parafuso protético. Ligas resilientes mostraram melhores resultados que as rígidas, enquanto a maior complexidade da seção transversal da barra e o maior nível de desajuste vertical aumentaram a concentração das tensões na barra, parafuso protético e tecido ósseo cortical. Conclui-se que as tensões induzidas na barra, parafuso protético e tecido ósseo peri-implantar foram influenciadas pelo aumento do desajuste vertical, complexidade da seção transversal e liga da barra<br>Abstract: The objective of this study was to evaluate by 3-D finite element analysis tensions occurred in overdentures with bar-clip retention systems, when different cross-sectional geometries (circular, oval or Hader) have different levels of vertical misfit (50, 100 and 200 µm) and were maded from different metallic alloys (type IV Au , Ag-Pd , Co-Cr and Ti cp). Three-dimensional models were maded using 3-D modeling software (SolidWorks 2010) and imported into the software of mechanical simulation (ANSYS Workbench 11). A displacement simulating screw tightening was done until proper fitting of the prosthetic platform infrastructure. The analyzes were performed in order to obtain the Maximum Principal Stress and von Mises (MPa). The stress values increased proportionally with the level of vertical misfit and Hader bar showed the highest values. Circular bars made with Au type IV showed the lowest values on the bar and prosthetic screw. Resilient alloys performed better than hard, while the greater complexity of the cross section of the bar and the highest levels of vertical misfit increased stress concentration on the infrastructure of the bar, prosthetic screw and cortical bone tissue. The stress induced on the bar, prosthetic screw and peri-implant bone tissue were influenced by increased vertical misfit, complexity of cross section and different alloys of the bar<br>Mestrado<br>Protese Dental<br>Mestre em Clínica Odontológica
32
Lin, Yi-Chun, and 林怡君. "Performance Improvement of Speaker Recognition for Clipped Audio Signals." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/ysqxnq.
Full textAbstract:
碩士<br>國立臺北科技大學<br>電腦與通訊研究所<br>100<br>This thesis investigates the problem of speaker verification under the condition that the recorded speech signals are clipped due to the saturation of quantization. The clipping of audio signals is not only unpleasant for human listening but also detrimental for speaker verification systems. Although there are a number of restoration techniques for improving the auditory quality of the clipped speech signals, it is found that the speaker characteristics of the restored clipped speech signals can be significantly changed; hence, the restoration techniques are of little help for speaker verification . To solve this problem, this study proposes improving the speaker verification by pruning the clipped signals instead of restoring them. However, to avoid that the length of a testing speech signal may be shorten severely after the pruning, we develop methods for detecting and discarding the speech frames that contain harmful clipped signals while keeping the speech frames that contain acceptable clipped signals. Our experiments conducted using the NIST2001 SRE database show that the proposed methods can reduce around 10% of the equal error rate of the speaker verification .
33
Liu, Wen-Ren, and 劉文仁. "Clipping Noise Cancellation for OFDM Systems with Clipped Data Signals." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/37253423794784494882.
Full textAbstract:
碩士<br>國立中央大學<br>通訊工程研究所碩士在職專班<br>96<br>In the past decade, the orthogonal frequency division multiplexing technique has received a lot of attention, which will be the main technology used in the wireless metropolitan area network (MAN) application. But a high signal amplitude variation can increase the design requirement of the power amplifier at the transmitter. To solve this problem, we can clip the transmitted signal to reduce the peak to average power ratio (PAPR). However, this will also induce the clipping noise.
In this paper, we study the method that only data signals are clipped and pilot signals are reserved at the transmitter in order to remain better channel estimation and synchronization performances. At the receiver, we apply the published methods, Decision-aided reconstruction (DAR) and Clipping Noise Estimation and Cancellation (CNEC), to reduce the effect of the clipping noise. Simulation results show that the new clipping method along with clipping noise cancellation algorithms can significantly improve the system performance.
34
Al-Rabah, Abdullatif R. "Bayesian Recovery of Clipped OFDM Signals: A Receiver-based Approach." Thesis, 2013. http://hdl.handle.net/10754/291094.
Full textAbstract:
Recently, orthogonal frequency-division multiplexing (OFDM) has been adopted for high-speed wireless communications due to its robustness against multipath fading. However, one of the main fundamental drawbacks of OFDM systems is the high peak-to-average-power ratio (PAPR). Several techniques have been proposed for PAPR reduction. Most of these techniques require transmitter-based (pre-compensated) processing. On the other hand, receiver-based alternatives would save the power and reduce the transmitter complexity. By keeping this in mind, a possible approach is to limit the amplitude of the OFDM signal to a predetermined threshold and equivalently a sparse clipping signal is added. Then, estimating this clipping signal at the receiver to recover the original signal. In this work, we propose a Bayesian receiver-based low-complexity clipping signal recovery method for PAPR reduction. The method is able to i) effectively reduce the PAPR via simple clipping scheme at the transmitter side, ii) use Bayesian recovery algorithm to reconstruct the clipping signal at the receiver side by measuring part of subcarriers, iii) perform well in the absence of statistical information about the signal (e.g. clipping level) and the noise (e.g. noise variance), and at the same time iv is energy efficient due to its low complexity. Specifically, the proposed recovery technique is implemented in data-aided based. The data-aided method collects clipping information by measuring reliable
data subcarriers, thus makes full use of spectrum for data transmission without the
need for tone reservation. The study is extended further to discuss how to improve the recovery of the clipping signal utilizing some features of practical OFDM systems i.e., the oversampling and the presence of multiple receivers. Simulation results demonstrate the superiority of the proposed technique over other recovery algorithms. The overall objective is to show that the receiver-based Bayesian technique is highly recommended to be an effective and practical alternative to state-of-art PAPR reduction techniques.
35
Lu, Yi-Hong, and 盧奕宏. "A Multiresolution Approach to Recovering Colors and Details of Clipped Image Regions." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/12337390752333775057.
Full textAbstract:
碩士<br>龍華科技大學<br>電機工程系碩士班<br>103<br>With the emergence of advanced technology and the mature development of mobile devices (such as camera phone), nowadays photographing has gradually become one of habits for people to record activities and events in their daily life. However, in regard with extrinsic and intrinsic parameters of a camera system, either factory settings or man-made settings may degrade the quality of the output image. Specifically, inappropriate exposure control, either intentionally or unintentionally, often causes the resultant image contains over-exposure regions and/or color channel(s). Such an effect is mainly because the intensity of a pixel is so over-saturated that the intensity is clipped. As a result, this is the so-called clipped pixels or clipped image regions. In this thesis, to resolve the problem of clipped image regions, we propose a multiresolution approach to recovering colors and details of clipped image regions. In the proposed scheme, the first step is to decompose an input image into a smooth image and the detail images at different scales. As for the smooth image, we propose a new desaturation method, which attempts to restore and recover the intensities and colors of the clipped image regions. As for the detail images, we propose the use of the detail enhancement method, which makes the extracted image details preserved or enhanced as the case may be. Moreover, in this thesis, through the use of the qualitative as well as quantitative evaluation methods, different sets of experiments have shown that the proposed scheme is indeed effective in recovering the colors and details of the clipped image regions.
36
Karlsson, Christoffer. "The performance impact from processing clipped triangles in state-of-the-art games." Thesis, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-16853.
Full textAbstract:
Background. Modern game applications pressures hardware to its limits, and affects how graphics hardware and APIs are designed. In games, rendering geometry plays a vital role, and the implementation of optimization techniques, such as view frustum culling, is generally necessary to meet the quality expected by the customers. Failing to optimize a game application can potentially lead to higher system requirements or less quality in terms of visual effects and content. Many optimization techniques, and studies of the performance of such techniques exist. However, no research was found where the utilization of computational resources in the GPU, in state-of-the-art games, was analyzed. Objectives. The aim of this thesis was to investigate the potential problem of commercial game applications wasting computational resources. Specifically, the focus was set on the triangle data processed in the geometry stage of the graphics pipeline, and the amount of triangles discarded through clipping. Methods. The objectives were met by conducting a case study and an empirical data analysis of the amount triangles and entire draw calls that were discarded through clipping, as well as the vertex data size and the time spent on processing these triangles, in eight games. The data was collected using Triangelplockaren, a tool which collects the triangle data that reaches the rasterizer stage. This data was then analyzed and discussed through relational findings in the results. Results. The results produced consisted of 30 captures of benchmark and gameplay sessions. The average of each captured session was used to make observations and to draw conclusions. Conclusions. This study showed evidence of noteworthy amounts of data being processed in the GPU which is discarded through clipping later in the graphics pipeline. This was seen in all of the game applications included in this study. While it was impossible to draw conclusions regarding the direct impact on performance, it was safe to say that the performance relative to the geometry processed was significant in each of the analyzed cases, and in many cases extreme.
37
CHANG, YI-HSIEN, and 張逸賢. "The Research of Trend-predicting growing method with Multi Image Feature applied on clipped Gyrus Image Segmentation." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/81118717551482419927.
Full textAbstract:
碩士<br>國立成功大學<br>電腦與通信工程研究所<br>97<br>The segmentation of a medical image is an integrated task. We need to integrate the knowledge of image processing, computer vision and anatomy to complete the task. This thesis describes how to use the techniques of image
processing with a blackboard architecture to generate the contours of the regions of interest. We also integrate another system, 3D Builder, to provide the interface for the users so that we can communicate with our system interactively and view the results of the 3-dimensional reconstruction during the process of recognition.
As far as image processing is concerned, we will describe the segmentation methods for the gray matter of gyrus, for helping us find out the correct regions. We hope use the contours to reconstruct 3D objects and find the thickness of the gray matter area, the information that user operate the gyrus 3D object is meaningful when the gray matter’s contour is correct . On the processing of image recognition, we use the globe
and local threshold method, and use various characteristic value to help segmentation on the algorithm. eventually, for the Trend predicting on region grow, we collect the local characteristic value information of the confirmed gray matter area, and use the predicting result to help use determine the region grow control.
About the blackboard architecture, we add the communication interface between the main system and the knowledge resources in the blackboard system which’s main architecture is already completed. According to professional knowledge, doctors can enter the helpful information into the system in the processes of image recognition.
Then we can gain more correct recognition results with knowledge resources.
38
Flimmel, Samuel. "Odhady parametrů useknutých časových řad." Master's thesis, 2015. http://www.nusl.cz/ntk/nusl-331689.
Full textAbstract:
In some situations we cannot observe the original time series and instead, we record only binary data which express whether the values of the original series exceeded a certain threshold or not. The thesis deals with estimation of characteristics of the original series constructed from the binary (so called clipped or hard-limited) data, in particular in Gaussian ARMA models. We summarize some basic characteristics of the clipped series and describe their relation to the original ones. Some practical examples are provided as well. The estimation of parameters in AR(p) model is shown for the case of zero threshold. Using a similar approach, an estimator of the MA(1) model parameter is proposed and its properties are studied with emphasis on asymptotic variance. Subsequently, we propose an estimation procedure for AR(p) and MA(1) models with unknown (non-zero) threshold. The behaviour of our estimators is investigated in a simulation study, which provides a comparison with estimators constructed from the original data. Finally, a real data analysis is presented for an illustration. Powered by TCPDF (www.tcpdf.org)
39
Shimmins, JD. "The Clipper, 1893-1902 : an example of radical journalism." Thesis, 1996. https://eprints.utas.edu.au/21564/1/whole_ShimminsJohnD1997_thesis.pdf.
Full textAbstract:
James Paton founded the Clipper in April 1893 as a radical,
socialist weekly newspaper through which he aimed to express his
ideals and review life in Tasmania at the turn of the century. In his time
as editor (which ran until the end of 1902), the Clipper included political
commentary, and reported on social and sporting events. Study of the
Clipper provides an insight into the lives and activities of Tasmanians,
particularly those of the late nineteenth century working class: This
bright, breezy paper was the first direct and successful appeal to the
Tasmanian working class and was an important step towards creating a
democratic self consciousness in the people.
40
Tseng, Hsiao-Ling, and 曾曉玲. "Re-engineering a DOS-based Clipper system to PowerBuilder system." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/11990230000315575482.
Full textAbstract:
碩士<br>逢甲大學<br>資訊工程所<br>92<br>Most software systems of business that have been running for a long time were almost designed with traditional structural programming. All the components inside these old software systems are tightly-coupled. And the functions and the data are inseparable as well. Therefore, the cost of maintaining such a traditional software system is much higher than developing a new one. From the viewpoint of software reengineering, understanding the original requirements of the old system and figuring out its specification are very important in software maintenance and development. A well-designed software architecture makes software maintenance much more easier and provides more flexibility as well.
In this paper, we take “Taichung Harbor Bureau—New Harbor Management System“ as a case to achieve software reengineering. This system is an application that manages the ships’ coming in and going out in the harbor. The workload of Taichung Harbor Bureau is heavier and heavier these years in addition to many new services. The Harbor management system based on DOS can’t afford anymore services. Besides, with these distributed and independent systems, resources can’t be integrated to provide more services. In order to provide more internet services, they need a whole new system with expansibility, extendibility and maintainability.
During the reengineering, the major challenges we had are the constant changes of architecture, data model, programming language, component interface and operation requirement. Here we apply Design Patterns methodology in this case. By using Design Patterns, we can quickly design every module and function. It also shows the flexibility when we develop the system. In this paper we state the experiences of migrating from DOS-based clipper program to object-based PowerBuilder program. Today many people are still running old DOS-based Clipper program under Novell network. We hope our research can help the people who try to migrate or re-engineer this kind of legacy systems.
41
Hou, Cheng-heng, and 侯政亨. "Human Factors Apply in Elder-use Nail Clipper Design and Evaluation." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/70512255840813144550.
Full textAbstract:
碩士<br>朝陽科技大學<br>工業工程與管理系碩士班<br>98<br>The increase of elder population in Taiwan has gradually brought the problems about degeneration of physical functions. These problems mostly are failing to successfully use the tools or equipments that are suitable for general people. This research focused on evaluating the problems and requirements with respect to nail cutter usage by elder people.
This research try to find out the problem of elder people in cutting nails by survery and simulator software, JACK. Based on the ergonomic and universal design principals to reconstruct the nail clipper for sale, the handgrip precisely draws the angle of reconstruct by CAD, fabricates the handgrip by RP technology and incorporates with footrest. The experimental design respectively tests ready-made and new-style nail clippers for 24 elder people and survey collects the total number of cutting and usage time. They fill an postmortem questionnaire survey after experiment.
According to results, they indicate that the new-style nail clipper was better than ready-made one in forcing and there were non-significance between these two nail clippers in total number of cutting and usage time.The performance of new-style nail clipper is the equal of ready-made product, and it has better snap-hold force.
42
Kock, Johan Frederick Willem. "Hearing protection in mines : evaluating the Noise Clipper® custom made hearing protection device." Diss., 2013. http://hdl.handle.net/2263/25539.
Full textAbstract:
Noise induced hearing loss has been extensively researched and commented on, yet it remains prevalent among industrial workers. The real-world attenuation properties of the Noise Clipper® custom-made hearing protection device and the comfort levels it afford are unknown. Furthermore, research in hearing conservation is seldom focused on the critical/biological thresholds for temporary threshold shift. Field studies on hearing protection devices have demonstrated that laboratory derived measures bear little relation to attenuation achieved in workers. Research has consistently demonstrated that noise reduction ratings that are derived from the laboratory real-ear-at-threshold method do not accurately represent the attenuation of noise that these devices actually provide and the matter remains unclear. Too many important variables are neglected in current real-ear-atthreshold evaluation protocols. This study used an alternative method, the microphone-inreal- ear approach where a dual-element microphone probe was inserted into the Noise Clipper® to measure noise reduction by recording the difference in noise levels outside and behind the device. The sub aims of the study were to record ambient noise levels and frequency spectra; to determine the attenuation characteristics; and to compare the attenuation thresholds to biological thresholds for temporary threshold shift. Using this protocol, measurements were made on 20 subjects in real world situations in order to match the attenuation characteristics of the Noise Clipper® to the actual noise exposure. The microphone-in-real-ear derived attenuation thresholds were compared to the real-earat- threshold values provided by the manufacturer of the Noise Clipper®. Additional subaims were to determine the comfort levels of the Noise Clipper® and record the selfreported wearing time of the device. Wearing comfort was evaluated using a bipolar rating scale. The researcher interviewed 240 mine workers at a platinum mine. Several comfort related sub-scales were used to quantify reported comfort levels. Simultaneously, usage time of the device was self-reported by each worker. Results of the microphone-in-real-ear measurements indicated that ambient noise levels fluctuated from day to day. The attenuation results indicated that most of the measurements suggested protection against noise induced hearing loss through the use of the Noise Clipper®. It was found that the REAT results over estimated the attenuation ability of the Noise Clipper® when compared to the results of the F-MIRE measurements. Eighty seven percent of the measurements indicated protection from thresholds below the biological threshold for temporary threshold shift. Seventy five percent of the workers indicated that the Noise Clipper® was comfortable to wear and 79% indicated that they used it for a full eight hour shift. The results provide an opportunity to assess the use of a protection device and its effectiveness among mineworkers combined with information regarding noise exposure levels. The findings highlight the importance of evaluating variability in terms of individual-specific protection.<br>Dissertation (MCommunication Pathology)--University of Pretoria, 2013.<br>Speech-Language Pathology and Audiology<br>unrestricted
43
Liao, Muhan, and 廖睦涵. "Performance Analysis of Anti-multi-jamming of BPSK/FFHSS with Clipper receiver over Nakagami-m fading channel." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/61014203140457017089.
Full textAbstract:
碩士<br>中華技術學院<br>電子工程研究所碩士班<br>96<br>This thesis pertains to the numerical evaluation of bit error probability of the system which is an binary phase-shift keying (BPSK)/ fast frequency hopping spread spectrum communications. The system is assumed to be worked over frequency nonselective Nakagami-m fading channel. The transmitted signal is also assumed to be attacked by a one-band worst multi-tone jamming, which is assumed to experience frequency nonselective Nakagami-m fading. The Jamming channel is assumed to be statistically independent of that of the signal channel. At the receiver end, the noncoherent square-law demodulation is employed, which is then fed to a linear clipper. Finally, the decision maker will output an estimated data.
The signal energy-to-noise power spectrum density ( ) is fixed, and the clipping level C, the fading figure m, and the hopping number in one bit L are used as parameters. The numerical approach is adopted to evaluate bit error probability of such a system in a variety of signal-to-jamming ratio (SJR).
Bit error probability is significantly affected by the value of clipping level. For example, By fixing and fading figure , the bit error probability with is better than that with when , where and is the signal power, the bit error probability with is better than that with when , the bit error probability with is better than that with and the bit error probability with is better than that with when .
44
"Identification and Quantitative Classification of Europa’s Microfeatures: Implications for Microfeature Formation Models and the Europa Clipper Flagship Mission." Doctoral diss., 2019. http://hdl.handle.net/2286/R.I.54833.
Full textAbstract:
abstract: Jupiter’s moon Europa is an active target of research because of its unique geology and its potential for habitability. Europa’s icy chaos disrupts and transforms the previous terrain, suggesting melting is involved. Chaos occurs alongside several types of endogenic surface features. These microfeatures are under <100 km2 in area and include uplifts and domes, pits, spots, and hybrid features. The distribution of microfeatures is known in the ~10% of the Europa’s surface that are covered by the regional mosaics (“RegMaps”). The efforts to connect microfeature formation to any kind of heat transport in Europa are confounded because microfeatures are difficult to identify outside of RegMaps because of low image resolutions. Finding microfeatures outside of RegMaps would provide new observational constraints for microfeature formation models.
First, I mapped microfeatures across four of Europa’s RegMaps and validated them against other mapping datasets. Microchaos features are the most numerous, followed by pits, domes, then hybrids. Spots are the least common features, and the smallest. Next, I mapped features in low-resolution images that covered the E15RegMap01 area to determine error rates and sources of omission or misclassification for features mapped in low-resolution images. Of all features originally mapped in the RegMap, pits and domes were the least likely to be re-mapped or positively identified (24.2% and 5%, respectively). Chaos, spots, and hybrids were accurately classified over 70% of the time. Quantitatively classifying these features using discriminant function analysis yielded comparable values of accuracy when compared to a human mapper. Finally, nearest-neighbor clustering analyses were used to show that pits are clustered in all regions, while chaos, domes, and hybrids vary in terms of their spatial clustering.
This work suggests that the most likely processes for microfeature formations is either the evolution of liquid water sills within Europa’s ice shell or cryovolcanism. Future work extending to more areas outside of the RegMaps can further refine microfeature formation models. The detection of liquid water at or near the surface is a major goal of multiple upcoming Europa missions; this work provides predictions that can be directly tested by these missions to maximize their scientific return.<br>Dissertation/Thesis<br>Doctoral Dissertation Geological Sciences 2019
45
Thomas, Blaine Conrad. "The Alberta Clipper a synoptic climatology, composite life cycle analysis, and survey of its relationship to large-scale features /." 2004. http://catalog.hathitrust.org/api/volumes/oclc/56838000.html.
Full textAbstract:
Thesis (M.S.)--University of Wisconsin--Madison, 2004.<br>Typescript. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 140-147).
46
Clippard, Maria Sylvia. "Steigerung der Immobilienperformance durch Nutzerorientierung. Möglichkeiten und Grenzen der Performancebewertung von Büroarbeitsplätzen." Phd thesis, 2020. https://tuprints.ulb.tu-darmstadt.de/11406/1/Clippard-Dissertation-Vero%CC%88ffentlichung.pdf.
Full textAbstract:
Die Arbeit setzt sich zum Ziel zu zeigen wie mittels eines nutzerorientierten Immobilienmanagements die Performance der Immobilie gesteigert werden kann. Dabei stehen Büroimmobilien im Fokus in denen Mitarbeiter als Nutzer mit ihren Tätigkeiten Wertschöpfung im Sinne der Unternehmensziele vollbringen. Die Unternehmen werden als Corporates oder Non-Property Unternehmen bezeichnet. In dieser Arbeit wird speziell die Operating Performance als Teil der Immobilienperformance adressiert. Durch eine Fokussierung auf den Nutzer und dessen Arbeitsperformance soll die Nutzungsqualität der Immobilie erhöht werden. Die Arbeit definiert zunächst die Wirkungsparameter und -beziehungen zwischen Immobilien und deren Nutzern und betrachtet auch psychologische Grundlagenmodelle sowie die neuen Arbeitswelten. Zudem werden die Möglichkeiten der Bewertung der Performance im laufenden Betrieb diskutiert. Anhand eines systematischen Literaturüberblicks werden Partialmodelle zu den Wirkungszusammenhängen aufgestellt und ein allumfassendes Rahmenmodell konzipiert. In den anschließenden Fallstudien werden Open Space Bürokonzepte auf ihre Nutzertauglichkeit hin untersucht. Sowohl in der Literaturanalyse als auch in den beiden Fallstudien wird vor allem die Herausforderung der Konzentrationsmöglichkeit aufgrund von Lärm deutlich. Zum Schluss der Arbeit werden Handlungsempfehlungen für das Corporate Real Estate Management (CREM) abgeleitet, besonders auch zur Akustik in Büros.
47
Kao, Chin-chun, and 高智群. "Re-evaluating Use Requirements of Seniors' Lifestyle Products-A Case Study of Nail Clippers." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/08078140271976051503.
Full textAbstract:
碩士<br>國立臺灣科技大學<br>設計研究所<br>100<br>The seniors’ need for daily necessities is different from other ages. In Taiwan, where the society is becoming an aging one, the products especially designed for the seniors are beginning to thrive. The purpose of this study is to re-design the clippers for the seniors and verify after reviewing the ones in market.
Through observation and interviews, the early stages of the study’s first period evaluated 5 clippers in the market claimed to be especially designed for the seniors. During second period of the study, via experiments, magnifying nail clippers, slant nail clippers, and nail clippers with rotary bit – the ones for the seniors – are found to be not favorable to the users. From the point of view of human factor engineering as well as universal design, it is found that the seniors prefer the clippers with enough sharpness, require less effort, and good to be held. Furthermore, the study identified that the seniors are found to be not only unstable but even shaking while holding and pressing the clippers with non-dominant hand. With the experimental questionnaire of existing products and interviews, below key points for design are generalized: (1) effort -saving, (2) sharp (3) stable for holding (4) comfortable (5) interchangeable for both hands.
The third stage is to re-design the nail clippers. SNAIL has auxiliary finger ring which is able to rotate. During the changing motions of clipping nails, the auxiliary finger ring decreases the seniors’ effort by providing a support point for the hand to increase stability, reduces the shaking resulted from holding and pressing the clippers. The handle is surfaced with rubber to provide more slip-resistance. The result recognized the fact that comparing to the nail clippers in market, SNAIL is better on the feeling of effort, holding, comfort, satisfaction as well as usefulness for both hands. Therefore, the efficiency of the seniors’ clipping their finger nails with nail clippers are promoted. However, the promotion on efficiency was not found on clipping toe nails.
48
Martins, Gustavo Zimmermann. "Critérios de seleção dos sistemas Locator® e barra-clipe em sobredentaduras implantosuportadas: scoping review." Master's thesis, 2020. http://hdl.handle.net/10284/9460.
Full textAbstract:
Introdução: As sobredentaduras implanto-suportadas demonstraram ter alta taxa de
sucesso na reabilitação de pacientes desdentados e o clínico precisa ter um bom
conhecimento sobre os diversos sistemas de fixação, suas vantagens e desvantagens,
indicações e contra-indicações para alcançar resultados estáveis e duradouros, pois
diferentes situações clínicas exigem tipos diferentes de sistemas de fixação.
Objetivos: Analisar e mapear os critérios de seleção dos sistemas de retenção Locator®
e barra-clipe em sobredentaduras implanto-suportadas e analisar os resultados obtidos
na literatura com a aplicação destes sistemas. Durante esta Scoping Review, pretende-se
responder à questão de investigação: "Quais os critérios a ter em consideração pelo
médico dentista na seleção do sistema Locator® ou barra-clipe na reabilitação oral
implanto-suportada removível dos seus pacientes?"
Materiais e métodos: A pesquisa e análise de artigos científicos, nos últimos 5 anos
foram das bases de dados on-line, PubMed Central (PMC) e Bvsalud..
Resultados: Resultaram 13 artigos, que demonstraram a possibilidade de analisar e
interpretar os critérios de seleção como a disponibilidade e a qualidade óssea, o espaço
protético, os recursos econômicos, a destreza manual e o edentulismo. De acordo com
os principais resultados obteve-se uma taxa de sobrevida implantar alta assim como a
elevada satisfação dos pacientes, pouca perda óssea marginal e a necessidade de
manutenção protética em ambos os sistemas.
Conclusão: Verificamos que existem poucas diferenças entre os sistemas, contudo,
alguns estudos apontam que o sistema Locator® apresenta melhor distribuição de forças
e melhor comportamento biológico peri-implantar, enquanto que o sistema barra-clipe,
apresenta menor reabsorção óssea marginal e boa retenção do clipe. Porém, existe uma
falta de uniformização nos estudos na análise dos critérios para determinação do melhor
sistema para sobredentaduras.<br>Introduction: Implant-supported overdentures have been shown to have a high success
rate in the rehabilitation of toothless patients and the clinician needs to have a good
knowledge of the various fixation systems, their advantages and disadvantages,
indications and contraindications to achieve stable and lasting results, because different
clinical situations require different types of fixation systems.
Objectives: To analyze and map the selection criteria of the Locator® and bar-clip
retention systems in implant-supported overdentures and to analyze the results obtained
in the literature with the application of these systems. During this Scoping Review, we
intend to answer the research question: "What are the criteria to be taken into account
by the dentist when selecting the Locator® system or bar-clip in the removable implantsupported oral rehabilitation of his patients?"
Materials and methods: The research and analysis of scientific articles, in the last 5
years were from the online databases, PubMed Central (PMC) and Bvsalud.
Results: 13 articles resulted, which demonstrated the possibility of analyzing and
interpreting the selection criteria such as bone availability and quality, prosthetic space,
economic resources, manual dexterity and edentulism. According to the main results, a
high implant survival rate was obtained, as well as high patient satisfaction, little
marginal bone loss and the need for prosthetic maintenance in both systems.
Conclusion: We found that there are few differences between the systems, however,
some studies indicate that the Locator® system has better force distribution and better
peri-implant biological behavior, while the bar-clip system has less marginal bone
resorption and good retention. of the clip. However, there is a lack of uniformity in
studies in the analysis of the criteria for determining the best system for overdentures.
49
Saheed, Sefiu Adekilekun, Christiaan Edward Johannes Botha, Lin Liu, and Lisbeth Jonsson. "Comparison of structural damage caused by Russian wheat aphid (Diuraphis noxia Mordvilko) and Bird cherry-oat aphid (Rhopalosiphum padi L.) in a susceptible barley cultivar, Hordeum vulgare L. cv Clipper." 2007. http://hdl.handle.net/10962/d1005981.
Full textAbstract:
The Russian wheat aphid (RWA, (Diuraphis noxia Mordvilko) and the Bird cherry-oat aphid (BCA, (Rhopalosiphum padi L.) cause severe damage to grain crops, including barley. An investigation of the effects of these aphids on a susceptible cultivar revealed that BCA-infested barley plants remained healthy-looking for two weeks after feeding commenced. In contrast, signs of stress and damage, including chlorosis and leaf necrosis were evident in RWA infested plants. Our study suggests that damage to the vascular tissue due to sustained feeding by BCA, was not as extensive as that caused by RWA. In addition, there is a marked difference in the salivary secretion pattern within xylem elements punctured by aphids tapping the xylem for water. RWA deposit electron-dense, amorphous to smooth saliva, which completely encases the inner walls of affected elements, and saliva encases pit membranes between xylem elements, and between xylem vessels and xylem parenchyma. Xylem tapped by BCA, contained more granular saliva, which apparently does not occlude vessel wall apertures or the pit membranes to the same extent as was observed with RWA. Damage to phloem tissue, including phloem parenchyma elements, sieve tube-companion cell (CC-ST) complexes as well as thick-walled sieve tubes, was extensive. Plasmodesmata between phloem parenchyma elements as well as pore-plasmodesmata between the CC-ST were occluded by callose. We conclude that severe, perhaps permanent damage to conducting elements in RWA infested leaves may be responsible for the detrimental chlorosis and necrosis symptoms. These symptoms are absent in BCA-infested plants.
50
Nascimento, Ruben Figueiredo do. "Análise estrutural de diferentes mecanismos de retenção para próteses totais mandibulares implanto-suportadas." Master's thesis, 2021. http://hdl.handle.net/10316/96208.
Full textAbstract:
Dissertação de Mestrado Integrado em Engenharia Mecânica apresentada à Faculdade de Ciências e Tecnologia<br>Objetivo: Um dos tratamentos para a reabilitação protética de um paciente é a prótese total removível ou Overdentures, constituído por: implantes ligados através de uma barra rígida, fixando a prótese através de clipes. A principal desvantagem deste sistema é que os clipes geralmente são metálicos e exigem trabalho do laboratório sempre que fraturam, ou perdem a retenção, provocando elevadas implicações financeiras. Posto isto, o objetivo deste projeto é o planeamento de um sistema de retenção fiável e de boa manutibilidade, constituído por dois implantes, uma barra, um clipe e um Housing. A barra une os dois implantes com uma geometria experimental. Os clipes são alojados num Housing para serem facilmente substituíveis.Materiais e Métodos: O estudo tem uma parte numérica e uma parte experimental. Inicialmente, na parte numérica, projetou-se o conjunto (barra, clipe, Housing) no Autodesk Inventor Professional 2021, para posteriormente importar no ADINA AUI 9.7. Analisando as vantagens e desvantagens, de todas as geometrias modeladas e o seu comportamento à mastigação foi possível definir uma geometria, para posterior otimização. De seguida, foram realizadas várias simulações da inserção/remoção da prótese, com o intuito de atingir o valor de força pretendido e perceber as modificações necessárias. Como os materiais utilizados (TPU, Nylon) têm um módulo de elasticidade de uma ordem de grandeza diferente foi realizada uma otimização, para materiais com menor módulo e outra para materiais com maior módulo.Na parte experimental, fabricou-se um bloco de espuma rígida de poliuretano, para simular o osso cortical. De seguida, foram colocados dois implantes da Straumann, centrados na largura e comprimento do bloco, com distância entre centros de 16 mm. Colocou-se um pilar aparafusado em cada implante, para posteriormente ser possível fixar a barra, através de dois parafusos oclusais. A barra, de liga Cr-Co, foi fresada na máquina DENTAL Concept Systems-DC7. Posteriormente, produziram-se os 3 clipes numa impressora 3D laser, denominada por NextDent 5100. Por fim, obtiveram-se os dois modelos de Housing por fundição. De forma a perceber a influência da interferência e do comprimento dos lábios do clipe foram criados 3 grupos de estudo. Todos os grupos de estudo utilizam a barra fabricada com geometria experimental e o Housing de flexão, diferenciando-se pelo clipe utilizado. Por isso, são definidos e identificados pelo nome do clipe: Grupo1-Clipe Curto; Grupo2-Clipe longo; Grupo3-Clipe longo com interferência. Para analisar os diferentes grupos foram elaborados 3 protocolos: inserção/remoção, mastigação e combinado (inserção/remoção e mastigação). Resultados: Na parte numérica, com as geometrias do conjunto otimizadas, obteve-se com o clipe de TPU uma força de inserção de -4,57 N e de remoção de 3,43 N. Com o clipe em Nylon obteve-se -69,6 N na inserção e 44,6 N na remoção. Na parte experimental, no ensaio de inserção/remoção com saliva, a taxa de crescimento da força apresentada pelo grupo 1 foi de 22%, pelo grupo 2 4,82% e o grupo 3 não cresceu. No final do ensaio, o grupo1 apresentou uma força de retenção de 1,2 N/mm, o grupo 2 1,52 N/mm e o grupo 3 0,98 N/mm. No ensaio de mastigação verificou-se que os ciclos de mastigação tinham influência na fratura dos lábios do clipe. No ensaio combinado, o clipe do grupo1 fraturou ao ciclo 95 e no grupo2 fraturou ao ciclo 4. Conclusões: Apesar dos materiais utilizados na parte experimental não coincidirem com a parte numérica (por falta de precisão geométrica da impressão por filamento), o estudo numérico foi fundamental para a perceção de conceitos, definição e otimização da geometria. A parte experimental serviu como complemento do estudo numérico e prova do conceito idealizado. As forças de inserção/remoção dependem, essencialmente, dos seguintes fatores: material e interferência geométrica do clipe, atrito entre os componentes e comprimento do sistema de retenção. Conclui-se que quanto maior o módulo de elasticidade do material, a interferência e o atrito, maior é a retenção e que a forma do Housing afeta a retenção do clipe. Para materiais com maior módulo de elasticidade deve-se utilizar um Housing curto, para os lábios do clipe estarem à flexão. Para materiais com um módulo de elasticidade menor deve-se utilizar um Housing longo, para os lábios do clipe estarem à compressão. Para o clipe deve ser utilizado um material com elevado limite de elasticidade, resistência à fadiga e elevada tenacidade à fratura.<br>Objective: One of the treatments for the prosthetic rehabilitation of a patient is a total removable denture or Overdentures, consisting of implants connected through a rigid bar, fastening a prosthesis using clips. The main disadvantage of this system is that those are metallic and need laboratory work whenever they fracture, or lose retention, causing certain expensive financial costs. Therefore, the objective of this project is the elaboration of a retention system, consisting of two implants, a bar, a clip, and housing. The bar joins the two implants with an experimental geometry. The clips are placed in Housing for easy replacement.Materials and Methods: The study has a numerical part and an experimental part. Initially, in the numerical part, the set was designed (bar, clip, Housing) in Autodesk Inventor Professional 2021, to later import into ADINA AUI 9.7. Analyzing the advantages and disadvantages of all modelled geometries and their chewing behaviour, it was possible to define a geometry for further optimization. Then, several simulations of the insertion/removal of the prosthesis were carried out, in order to reach the desired force value and realize the necessary changes. As the materials used (TPU, Nylon) have an elastic modulus of a different order of magnitude, optimization was carried out for materials with lower modulus and another for materials with a higher modulus.In the experimental part, a block of rigid polyurethane foam was manufactured to simulate the cortical bone. Then, two Straumann implants were placed, centered on the width and length of the block, with a distance between centers of 16 mm. A screwed abutment was placed in each implant so that the bar could be fixed later using two occlusal screws. The bar, made of Cr-Co alloy, was milled on the DENTAL Concept Systems-DC7 machine. Subsequently, the 3 clips were produced in a 3D laser printer, called NextDent 5100. Finally, the two housing models were obtained by foundry. To understand the influence of interference and the length of the clip's lips, 3 study groups were created. All study groups use the bar manufactured with experimental geometry and the flexion housing, differing by the clip used. Therefore, they are defined and identified by the name of the clip: Group1- Short Clip; Group2-Long Clip; Group3-long clip with interference. To analyze the different groups, 3 protocols were created: insertion/removal, chewing and combined (insertion/removal and chewing).Results: In the numerical part, with the set geometries optimized, an insertion force of -4.57 N was obtained as well as a removal force of 3.43 N with the TPU clip. With the Nylon clip, an insertion force of -69.6 N was obtained as well as a removal force of 44.6N.In the experimental part, in the insertion/removal test with saliva, the rate of strength growth presented by group 1 was 22%, by group 2 was 4.82% and group 3 did not grow. At the end of the test, group 1 had a holding force of 1.2 N/mm, group 2 of 1.52 N/mm, and group 3 0.98 N/mm. In the chewing test, it was verified that the chewing cycles had an influence on the fracture of the clip's lips. In the combined trial, the clip in group1 fractured at cycle 95 and in group2 it fractured at cycle 4.Conclusions: Although the materials used in the experimental part don´t coincide with the numerical part (due to the lack of geometric precision of the filament printing), the numerical study was fundamental for the perception of concepts, definition, and optimization of the geometry. The experimental part served as a complement to the numerical study and proof of the idealized concept. Insertion/removal forces depend essentially on the following factors: material and geometric interference of the clip, friction between components, and length of the retention system; The greater the material's modulus of elasticity, interference, and friction, the greater the retention and that the Housing shape affects clip retention system. The conclusion is that for materials with a higher modulus of elasticity, a short housing should be used, so that the clip lips are flexing. For materials with a lower modulus of elasticity, a long Housing must be used, so that the clip lips are in compression; For the clip, a material with a high elasticity limit, fatigue resistance, and high fracture tenacity must be used.