Dissertations / Theses: 'UHT processing'

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Scott, David L. "UHT processing and aseptic filling of dairy foods." Manhattan, Kan. : Kansas State University, 2008. http://hdl.handle.net/2097/970.

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Feldman, Ariella. "Quantification of Fouling during UHT Processing in an Indirect Tubular Heat Exchanger." The Ohio State University, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=osu1469172226.

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Prasad, S. K. "The sensory characteristics of heat-treated milks, with special reference to UHT processing." Thesis, University of Reading, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.234789.

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Moloto, Phuti Gladys. "Identification of the dominant bacteria associated with the spoilage of UHT full cream milk." Thesis, Vaal University of Technology, 2016. http://hdl.handle.net/10352/457.

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M. Tech. (Biotechnology, Department of Biosciences, Faculty of Applied and Computer Sciences), Vaal University of Technology.
The Organization for Economic Co-operation and Development (OECD) and the Food and Agriculture Organization (FAO) of the United Nations predict that milk production and the dairy sector will remain one of the fastest-growing agricultural subsectors over the coming decade. The global milk production is projected to expand over the 2011-2020 period at an annual rate of 2%. In South Africa alone, approximately 14 – 15 million litres of milk are wasted annually due to microbial spoilage. Therefore, the identification of the spoilage microorganisms in the milk products is necessary. This will contribute towards the design of appropriate measures to prevent wastage due to spoilage and in turn contribute towards sustainability of the sector. Accordingly, one hundred samples of spoiled full cream UHT milk were collected from two plants of each of the two largest milk processors. These samples were examined visually, and the pH was measured. A presumptive identification up to genus level was conducted by examining morphological features and conducting Gram-stain, catalase and oxidase tests. Species-specific identification was done by using the Analytical Profile Index and Biolog system. Molecular profiling was done by sequencing the rDNA genes. The main spoilage organisms identified in the samples were Pseudomonas, Micrococcus, Bacillus, Enterococcus and Lactobacillus. All organisms belonging to the five genera were psychrotrophs, which are commonly found in biofilms in UHT milk processing equipment. Therefore, according to the study, the spoilage bacteria apparently entered into the milk due to inadequate cleaning-in-place (CIP) processes. More importantly, further studies should be conducted in order to identify the spoilage microbes and how CIP processes can be improved.

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Srichantra, Arunee. "Studies of UHT-plant fouling by fresh, recombined and reconstituted whole milk : a thesis presented in partial fulfilment of the requirements for the degree of Doctor of Philosophy in Food Engineering." Massey University, 2008. http://hdl.handle.net/10179/961.

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The objective of this study was to investigate the effects of preheat treatments on fouling by fresh whole milk (FWM), recombined whole milk (RCB) and reconstituted whole milk (Recon) in the high-temperature heater of indirect UHT plants. Various preheat treatments prior to evaporation during milk powder manufacture were applied to skim milk powder (SMP, 75 °C 2 s, 85 °C, 155 s and 95 °C, 155 s) and whole milk powder (WMP, 95 °C, 33 s). These preheat treatments were so-called “evaporator preheat treatments”. Skim milk powder (SMP) and whole milk powder (WMP) were derived from the same original batch of pasteurised FWM to remove the effects of the variation in milk composition between different milk batches. These SMPs were recombined with anhydrous milk fat and water to prepare RCB, and WMPs were reconstituted with water to prepare Recon. Then, (homogenized) FWM, RCB and Recon were subjected to various preheat treatments (75 °C, 11 s, 85 °C, 147 s and 95 °C, 147 s) prior to UHT processing. These preheat treatments were so-called “UHT preheat treatments”. Temperature difference (hot water inlet temperature – milk outlet temperature) was taken as a measure of the extent of fouling in the high-temperature heater. The slope of the linear regression of temperature difference versus time (for two hours of UHT processing) was taken as fouling rate (°C/h). Increasing both evaporator and UHT preheat treatments resulted in increasing fouling rate and total deposit weight for all three whole milk types for several milk batches. In the case of FWM, there was no reduction in fouling rate with increasing UHT preheat treatment whether FWM was homogenized then preheated, preheated then homogenized or not homogenized at all. These findings, which are wholly consistent and well replicated, are in apparent conflict with the results of most previous comparable studies. Possible reasons for this are explained. Further investigations of the effects of homogenization relating to the role of whey protein on the surface of the fat globules showed that whey protein associated with the membrane covering the surface of fat globules for homogenized then preheated FWM, RCB and Recon and that association increased with increasing heating process stage. The increasing association of whey protein with the milk fat globules membrane with increasing severity of heating process stage became faster when preheat treatment was more severe: the association of whey protein plateaued on intermediate temperature heating when the milks were preheated at 75°C, 11 s and on preheating when the milks were preheated at 95°C, 147 s. In the case of FWM, the thickness of the membrane covering the surface of fat globules for homogenized then preheated FWM, which increased with the severity of heating process stage, was greater than the thickness of the membrane in preheated then homogenized FWM. Preheating then homogenization resulted in the greater interfacial spreading of small molecules on the surface of fat globules, i.e. whey protein or small molecules from the disintegration of casein micelles during preheating. Possible basic mechanisms for UHT fouling in the high-temperature heater include: the reduction in the solubility of calcium phosphate and the deposition of protein as fat-bound protein and non-fat-bound protein. When non-fat-bound protein in milk plasma deposited, it could be a carrier for the deposition of mineral, such as, the precipitate of calcium phosphate in the casein micelles or the deposition of complexes between whey protein and casein micelles.

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Walker, Luke Sky. "Processing of Ultra High Temperature Ceramics." Diss., The University of Arizona, 2012. http://hdl.handle.net/10150/228496.

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For hypersonic flight to enable rapid global transport and allow routine space access thermal protection systems must be developed that can survive the extreme aerothermal heating and oxidation for extended periods of time. Ultra high temperature ceramics (UHTCs) are the only potential materials capable of surviving the extreme hypersonic environment however extensive research in processing science and their oxidation properties are required before engineering systems can be developed for flight vehicles. Investigating the role of oxides during processing of ultra high temperature ceramics shows they play a critical role in both synthesis of ceramic powders and during densification. During spark plasma sintering of UHTCs the oxides can result in the formation of vapor filled pores that limit densification. A low temperature heat treatment can remove the oxides responsible for forming the vapor pores and also results in a significant improvement of the densification through a particle surface physical modification. The surface modification breaks up the native continuous surface oxide increasing the surface energy of the powder and removing the oxide as a barrier to diffusion that must be overcome before densification can begin. During synthesis of UHTCs from sol-gel the B₂O₃ phase acts as the main structure of the gel limiting the transition metal oxide network. While heat treating to form diborides the transition metal oxide undergoes preferential reduction forming carbides that reduce B₂O₃ while at high temperature encourage particle growth and localized extreme coarsening. To form phase pure borides B₂O₃ is required in excessive quantities to limit residual carbides, however carbide reduction and grain growth are connected. When the UHTC systems of ZrB₂-SiC are exposed to oxidation, either as dense ceramics or coatings on Carbon-Carbon composites, at high temperatures they undergo a complex oxidation mechanism with simultaneous material transport, precipitation and evaporation of oxide species that forms a glass ceramic protective oxygen barrier on the surface. The composite effect observed between the oxides of ZrB₂-SiC enables them to survive extreme oxidizing environments where traditional SiC oxidation barrier coatings fail.

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Alkhafaji, Nasr Nomas Hussein. "UHF and Microwave Phase-Modulated Scattering Array." PDXScholar, 2019. https://pdxscholar.library.pdx.edu/open_access_etds/4998.

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This dissertation investigates the use an array of active nonlinear elements, with particular emphasis on controlling distortion products generated by nonlinear elements in space rather than using conventional ways such as transmission lines, waveguides, and power dividers and combiners. The nonlinear elements are made of assemblies of antennas and electronic switches, called modulated scatterers (MSs). These so-called MSs elements are utilized in a wide variety of applications such as radio frequency identification (RFID) systems, microwave imaging, Internet-of-Things sensors, etc. However, no research work has been reported in the literature regarding exploiting and controlling several distortion products generated by MSs at the same time according to the best of authors' knowledge. To facilitate controlling distortion products which means suppressing or enhancing distortion products in space, we present a nonlinear array with elements that are MSs instead of conventional antennas. MSs are switched ON-OFF at different times by modulation signals having the same frequency. The time delay of the switching process between array elements represents a relative phase shift difference in the frequency domain. Thus, the presented structure is called the phase-modulated scattering array (PMSA). The PMSA has a similar layout of phased arrays, but it does not have a feeding network and is fed by an external source called the illuminating source. Because our system does not need a feeding network and phase shifters, it is potentially easier to implement with low cost. Two different signals which are the illuminating (incident) and modulation signals interact inside switches to generate a huge number of distortion products due to the nonlinearity of switches and the periodic nature of the presented system. Distortion products then leave the presented PMSA to space again (i.e., scattering distortion products). The PMSA is able to treat distortion products and achieve beamforming functions. The operation mechanism of the PMSA is explained by developing two different mathematical models. Communication signal processing perspectives are the basis of the first mathematical model developed to show the spatial characteristics of distortion products generated by our presented PMSA. Its root is originated from a mathematical model of the widely-used polyphase multipath technique in RF communication circuits. However, the adopted technique is suitable only for communication circuits with a single output and parameters prescribed in advance. Thus, the model is further developed to circumvent all the problems mentioned above and to be able to detect the spatial characteristics of distortion products at any point in space. Static impacts of the measurement environment, real radiation patterns of actual antennas utilized in prototypes, and phase and gain errors among paths have been taken into account as well. In the model, every single scatterer is represented by a single separate path. Furthermore, the modified model is extended to include single, two, and multi tones modulation signals. Simulation results have been obtained before and after the modification for a different number of paths and modulation signals with different tones. Results show that the modified model can quantify spatial characteristics of distortion products at any point in space where specific distortion products are enhanced, and others are canceled. Because distortion products are independent in their nature (i.e., each single distortion product has different frequency and phase), they have independent radiation patterns (scattered beams). Therefore, the second mathematical model based on phased antenna array perspectives is developed. The relationship between the two models states that a distortion product which is enhanced at a certain point in space has a maximum scattered beam at that point. Also, the second mathematical model being similar to mathematical models of phased arrays considers effects of all distortion products resulting from single, two, and multi tones modulation signals, and it states that each single distortion component has its particular scattered beam. Next, sub-models for some properties and applications of the presented PMSA such as a diffraction grating-like behavior, nonreciprocity, beamforming, a tool for distortion product analysis of phased arrays and multi-input multi-output (MIMO systems), a reconfigurable-spatial harmonic generator, and a direction finding technique are derived depending on the two main mathematical models. All parts are simulated and results validate all proposed functionalities. Single antennas, antenna arrays, electronic switches (modulators), and a 4-to-8 phase transformer kit using only resistors have been designed, simulated, fabricated, assembled, and tested. Eventually, different structures of the presented PMSAs working at 432MHz and 2.3GHz are tested inside the anechoic chamber. Both frequencies are downconverted to the band 2-22kHz. Modulation signals used in the experimental setups are single and two tones. Data are measured using the commercial software SigView running on a laptop and a spectrum analyzer. Both spatial characteristics and scattered beams of distortion products are measured. Comparisons have been made between measured received responses of scattered signals and theoretical results. They are in good agreement although limitations and challenges are encountered with each round of measurement. Measured results confirm practically that as a number of scatterers increases, more distortion products are controlled at the same time. The distortion product rejection ratio DPRR is more than 15dB for all measured distortion products supposed to be canceled. Directions of scattered beams are found at expected locations with errors less than 3%. Furthermore, directions of illuminating signals or distances separating between PMSA elements are varied to change directions of scattered beams when prescribed values of parameters governing the overall performance are being broken. In other words, the beamforming functionality has been validated practically. Different elements of 8*1-PMSA are turned-off at measurements in order to find fault tolerances of the presented system. Measured results show that when two elements are failed simultaneously, responses can be accepted to some extent.

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Venugopal, Saranya. "Synthesis and processing of sub-micron hafnium diboride powders and carbon-fibre hafnium diboride composite." Thesis, Loughborough University, 2013. https://dspace.lboro.ac.uk/2134/12532.

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A vehicle flying at hypersonic speeds, i.e. at speeds greater than Mach 4, needs to be able to withstand the heat arising from friction and shock waves, which can reach temperatures of up to 3000oC. The current project focuses on producing thermal protection systems based on ultra high temperature ceramic (UHTC) impregnated carbon-carbon composites. The carbon fibres offer low mass and excellent resistance to thermal shock; their vulnerability is to oxidation above 500oC. The aim of introducing HfB2, a UHTC, as a coating on the fibre tows or as particulate reinforcement into the carbon fibre preform, was to improve this property. The objectives of this project were to: i) identify a low temperature synthesis route for group IV diborides, ii) produce a powder fine enough to reduce the difficulties associated with sintering the refractory diborides, iii) develop sol-gel coating of HfB2 onto carbon fibre tows iv) improve the solid loading of the particulate reinforcement into the carbon fibre preform, which should, in turn, increase the oxidation protection. In order to achieve the above set objectives, fine HfB2 powder was synthesized through a low temperature sol gel and boro/carbothermal reduction process, using a range of different carbon sources. Study of the formation mechanism of HfB2 revealed an intermediate boron sub-oxide and/or active boron formation that yielded HfB2 formation at 1300oC. At higher temperatures the formation of HfB2 could be via intermediate HfC formation and/or B4C formation. Growth mechanism analysis showed that the nucleated particles possessed screw dislocations which indicated that the formation of HfB2 was not only through a substitution reaction, but there could have been an element of a precipitation nucleation mechanism that lead to anisotropic growth under certain conditions. The effect of carbon sources during the boro/carbothermal reduction reaction on the size of the final HfB2 powders was analysed and it was found that a direct relation existed between the size and level of agglomeration of the carbon sources and the resulting HfB2 powders. A powder phenolic resin source led to the finest powder, with particle sizes in the range 30 to 150 nm. SPS sintering of the powder revealed that 99% theoretical density could be achieved without the need for sintering aids at 2200oC. Sol-gel coatings and slurry impregnation of HfB2 on carbon fibres tows was performed using dip coating and a 'squeeze-tube' method respectively. Crack free coatings and non-porous matrix infiltration were successfully achieved. The solid loading of the fine HfB2 into the carbon fibre preform was carried out through impregnation of a HfB2 / phenolic resin/acetone slurry using vacuum impregnation. Although the sub-micron Loughborough (LU) powders were expected to improve the solid loading, compared to the commercially available micron sized powders, due to the slurry made from them having a higher viscosity because of the fine particle size, the solids loading achieved was consequently decreased. Optimisation of the rheology of the slurry with LU HfB2 still requires more work. A comparison of the oxidation and ablation resistance of the Cf-HfB2 composites prepared with both commercial micron sized HfB2 powder and Loughborough sub-micron sized HfB2 powder, each with similar level of solid loading, was carried out using oxyacetylene torch testing. It was found that the composite containing the finer, Loughborough powders suffered a larger erosion volume than the composite with the coarser commercial powders indicating that the former offered worse ablation and oxidation resistance than the latter. A full investigation of the effect of solids loading and particle size, including the option of using mixtures of fine and coarse powders, is still required.

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Brunö, Viktor. "Etablera sig som låtskrivare : Hur ser processen ut?" Thesis, University of Skövde, School of Humanities and Informatics, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:his:diva-3113.

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I detta examensarbete undersöker jag hur man kan etablera sig som låtskrivare, vilkakontakter man behöver, vilken kunskap man bör ha. Rapporten beskriver delvis minaupplevelser av marknaden samt grundas på information från intervjuer med etableradesvenska kompositörer. Parallellt med examensarbetet deltar jag i projektet Soundmasters (Sedefinition sida 3) vilket ger mig ett kontaktnät samt tillgång till karriärrådgivare.

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Biatek, Thibaud. "Efficient rate control strategies for scalable video coding." Thesis, Rennes, INSA, 2016. http://www.theses.fr/2016ISAR0007/document.

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High Efficiency Video Coding (HEVC/H.265) est la dernière norme de compression vidéo, finalisée en Janvier 20 13. Son extension scalable, SHVC, a été publiée en Octobre 2014 et supporte la scalabilité spatiale, en gamut de couleur (CGS) et même en norme de compression (AVC vers HEVC). SHVC peut être utilisée pour l'introduction de nouveaux services, notamment grâce à la rétrocompatibilité qu'elle apporte par la couche de base (BL) et qui est complétée par une couche d'amélioration (BL+EL) qui apporte les nouveaux services. De plus, SHVC apporte des gains en débit significatifs par rapport à l'encodage dit simulcast (l'encodage HEVC séparés). SHVC est considérée par DVB pour accompagner l'introduction de services UHD et est déjà incluse dans la norme ATSC-3.0. Dans ce contexte, l'objectif de la thèse est la conception de stratégies de régulation de débit pour les codeurs HEVC/SHVC lors de l'introduction de nouveaux services UHD. Premièrement, nous avons étudié l'approche p-domaine qui modélise linéairement le nombre coefficient non-nuls dans les résidus transformés et quantifiés avec le débit, et qui permet de réaliser des régulations de débit peu complexes. Après validation du modèle, nous avons conçu un premier algorithme de contrôle de débit au niveau bloc en utilisant cette approche. Pour chaque bloc et son débit cible associé, notre méthode estime de façon précise le paramètre de quantification (QP) optimal à partir des blocs voisins, en limitant l'erreur de débit sous les 4%. Puis, nous avons proposé un modèle d'estimation déterministe du p-domaine qui évite l'utilisation de tables de correspondance et atteignant une précision d'estimation supérieure à90%. Deuxièmement, nous avons investigué l'impact du ratio de débit entre les couches d'un codeur SHVC sur ses performances de compression, pour la scalabilité spatiale, CGS et SOR vers HDR. En se basant sur les résultats de cette étude, nous avons élaborés un algorithme de régulation de débit adaptatif. La première approche proposée optimise les gains de codage en choisissant dynamiquement le ratio de débit optimal dans un intervalle prédéterminé et fixe lors de l'encodage. Cette première méthode a montré un gain de codage significatif de 4.25% par rapport à une approche à ratio fixe. Cette méthode a été ensuite améliorée en lui ajoutant des contraintes de qualité et de débit sur chaque couche, au lieu de considérer un in tervalle fixe. Ce second algorithme a été testé sur le cas de diffusion de programme HD/UHD ct de déploiement de se1vices UHDI-P1 vers UHD 1-P2 (cas d'usage DVB), où elle permet des gains de 7.51% ct 8.30% respectivement. Enfin, le multiplexage statistique de programmes scalable a été introduit et brièvement investigué. Nous avons proposé une première approche qui ajuste conjointement le débit global attribué à chaque programme ainsi que le ratio de débit, de façon à optimiser les performances de codage. De plus, la méthode proposée lisse les variations et l'homogénéité de la qualité parmi les programmes. Cette méthode a été appliquée à une base de données contenant des flux pré-encodés. La méthode permet dans ce cas une réduction du surcoût de la scalabilité de 11.01% à 7.65% comparé à l'encodage a débit et ratio fixe, tout en apportant une excellente précision et une variation de qualité limitée
High Efficiency Video Coding (HEVC/H.265) is the latest video coding standard, finalized in Janua1y 2013 as the successor of Advanced Video Coding (AVC/H.264). Its scalable extension, called SHVC was released in October 2014 and enables spatial, bitdepth, color-gamut (CGS) and even standard scalability. SHVC is a good candidate for introducing new services thanks to backward compatibility features with legacy HEVC receivers through the base-layer (BL) stream and next generation ones through the BL+EL (enhancement layer). In addition, SHVC saves substantial bitrate with respect to simulcast coding (independent coding of layers) and is also considered by DVB for UHD introduction and included in ATSC-3 .0. In this context, the work of this thesis aims at designing efficient rate-control strategies for HEVC and its scalable extension SHVC in the context of new UHD formats introduction. First, we have investigated the p-domain approach which consists in linking the number of non-zero transfonned and quantized residual coefficients with the bitrate, in a linear way, to achieve straightforward rate-control. After validating it in the context of HEVC and SHVC codings, we have developed an innovative Coding Tree Unit (CTU)-level rate-control algorithm using the p-domain. For each CTU and its associated targeted bit rate, our method accurately estimates the most appropriate quantization parameter (QP) based on neighborhood indicators, with a bit rate error below 4%. Then, we have proposed a deterministic way of estimating the p-domain model which avoids the implementation of look-up tables. The proposed method enables accurate model estimation over 90%. Second, we have explored the impact of the bitrate ratio between layers on the SHVC performance for the spatial, CGS and SDR-to-HDR scalability. Based on statistical observations, we have built an adaptive rate control algorithms (ARC). We have first proposed an ARC scheme which optimizes coding performance by selecting the optimal ratio into a fixed ratio inte1val, under a global bitrate instruction (BL+EL). This method is adaptive and considers the content and the type of scalability. This first approach enables a coding gain of 4.25% compared to fixed-ratio encoding. Then, this method has been enhanced with quality and bandwidth constraints in each layer instead of considering a fixed interval. This second method has been tested on hybrid delivery of HD/UHD services and backward compatible SHVC encoding of UHDI -PI /UHDI -P2 services (DVB use-case) where it enables significant coding gains of 7.51% and 8.30%, respectively. Finally, the statistical multiplexing of SHVC programs has been investigated. We have proposed a first approach which adjusts both the global bit rate to allocate in each program and the ratio between BL and EL to optimize the coding performance. In addition, the proposed method smooths the quality variations and enforces the quality homogeneity between programs. This method has been applied to a database containing pre-encoded bitstreams and enables an overhead reduction from 11.01% to 7.65% compared to constant bitrate encoding, while maintaining a good accuracy and an acceptable quality variations among programs

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Lipke, David William. "Novel reaction processing techniques for the fabrication of ultra-high temperature metal/ceramic composites with tailorable microstructures." Diss., Georgia Institute of Technology, 2010. http://hdl.handle.net/1853/43750.

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Ultra-high temperature (i.e., greater than 2500°C) engineering applications present continued materials challenges. Refractory metal/ceramic composites have great potential to satisfy the demands of extreme environments (e.g., the environments found in solid rocket motors upon ignition), though general scalable processing techniques to fabricate complex shaped parts are lacking. The work embodied in this dissertation advances scientific knowledge in the development of processing techniques to form complex, near net-shape, near net-dimension, near fully-dense refractory metal/ceramic composites with controlled phase contents and microstructure. Three research thrusts are detailed in this document. First, the utilization of rapid prototyping techniques, such as computer numerical controlled machining and three dimensional printing, for the fabrication of porous tungsten carbide preforms and their application with the Displacive Compensation of Porosity process is demonstrated. Second, carbon substrates and preforms have been reactively converted to porous tungsten/tungsten carbide replicas via a novel gas-solid displacement reaction. Lastly, non-oxide ceramic solid solutions have been internally reduced to create intragranular metal/ceramic micro/nanocomposites. All three techniques combined have the potential to produce nanostructured refractory metal/ceramic composite materials with tailorable microstructure for ultra-high temperature applications.

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Rizk, Isabella, and Tobias Hedberg. "Hur svenska SMEs utövar inifrån-ut processen av öppen innovation." Thesis, Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-166810.

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Bakgrund: Vikten av att öppna upp sin innovationsprocess, både internt inom organisationen och externt utanför organisationen, är av stor betydelse för företag i dagens samhälle. Studier på specifikt inifrån-ut processen av öppen innovation är ett underrepresenterat område inom forskningen på öppen innovation. Genom en litteraturgenomgång belyses tre områden inom inifrån-ut processen som är i behov av vidare forskning: för- och nackdelar, framgångsfaktorer samt ett beaktande av dessa aspekter från perspektivet av SMEs. Enligt Europeiska kommissionen (2018) utgör ca 99.8% av företagen inom EU av SMEs, således föreligger det av intresse att belysa inifrån-ut processen av ÖI, i form av för- och nackdelar samt framgångsfaktorer, utifrån ett SME-perspektiv. Syfte: Syftet med studien är att bidra till ökad förståelse om hur svenska SMEs utövar inifrån-ut processen av ÖI. Detta genom att belysa huvudsakliga för- och nackdelar med processen samt identifiera framgångsfaktorer och hur dessa förhåller sig till de funna huvudsakliga för- och nackdelarna. Metod: Detta är en kvalitativ flerfallsstudie, varav fem olika fallföretag har studerats. Studien antar ett realistiskt perspektiv med en abduktiv ansats, för att möjliggöra teori- prövning såväl som -generering. Studiens empiriska data utgörs av fem semistrukturerade intervjuer med respondenter från fem olika svenska SMEs inom life science-branschen. Slutsats: Studien belyser två respektive fyra stycken huvudsakliga fördelar med den säljande respektive avslöjande formen av inifrån-ut processen av ÖI. Gällande de huvudsakliga nackdelarna, presenteras två stycken för respektive form av inifrån-ut processen. Vidare identifierar studien sju framgångsfaktorer, varav fem stycken är kritiska och två stycken är möjliggörande, som anses viktiga för svenska SMEs som utövar inifrån-ut processen av ÖI. Dessa framgångsfaktorer bidrar, i stor mån, till att uppnå de huvudsakliga fördelarna, medan ett minimerande av de huvudsakliga nackdelarna har fastställs i mindre utsträckning. Slutligen dras slutsatsen att den avslöjande formen används i syfte att möjliggöra den säljande formen, vilket skiljer sig från tidigare forskning där de två formerna presenterats utövas separat. Således utgör detta ett av studiens teoretiska såväl som empiriska bidrag gällande inifrån-ut processen av ÖI.
Background: Opening up a firm's innovation process, both within the organization and outside its boundaries, is of high importance in today’s society. Within the open innovation literature (OI), studies on outbound OI marks a relatively unexplored area. By conducting a literature review we identified three areas within the outbound OI literature, that are in need of further research: advantages and disadvantages, success factors and viewing these aspects from an SME-perspective. According to the European Commission (2018) 99.8% of the companies within the EU are SMEs, hence making the perspective of SMEs an interesting base for researching advantages, disadvantages and success factors within outbound OI. Purpose: The purpose of this study is to contribute to an increased understanding of how Swedish SMEs practice outbound OI. This is achieved by looking at the main advantages and disadvantages with the process, as well as identifying success factors and how these relate to the main advantages and disadvantages. Method: This is a qualitative multiple case study, in which five cases have been studied. The study is based on the philosophical standpoint of realism, with an abductive approach, in order to enable testing as well as the creation of theory. The empirical data consists of five semi-structured interviews with representatives from five different Swedish SMEs within the life-science industry. Conclusions: The study identifies two, respectively four, main advantages of the selling and revealing form of outbound open innovation. Regarding the main disadvantages, two disadvantages is presented for each form of outbound OI. Furthermore, the study identifies seven success factors, of which five are critical and two are enablers, which are considered important for Swedish SMEs who practice outbound OI. These success factors contribute in achieving the main advantages, while their effect on minimizing the main disadvantages has been identified to a lesser extent. Lastly, it is concluded that the revealing form is used in order to enable the selling form of outbound OI. This differs from how previous research has presented the two forms, as being performed separately. Hence, this is one of the study’s theoretical, as well as empirical, contributions to the research field of outbound OI.

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Duarte, Rafael Moura. "Localização de fontes de descargas parciais baseada em técnicas radiométricas." Universidade Federal da Paraíba, 2016. http://tede.biblioteca.ufpb.br:8080/handle/tede/8797.

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Conselho Nacional de Pesquisa e Desenvolvimento Científico e Tecnológico - CNPq
One way to diagnose the level of electrical insulation degradation is to identify the occurrence of partial discharges (PD). Early detection of defects in insulation enables the programming of electric power equipment maintenance activities. Thus, the electrical system can operate more reliably and with fewer interruptions. In addition to detection, the information provided by pulses of partial discharges allow the location of its source. In this work, the main objective is to develop a hybrid technique of location, based on the time-of-arrival and the energies of PD signals. The performance of the hybrid technique was compared with three other location radiometric techniques. For this purpose, the methods used to estimate time-of-arrival of PD pulses and localization techniques are explained in details. In order to make simulations of this work was to develop a model of ray tracing, which is able to simulate the propagation of the pulse wave environments defined by maps. These results were obtained from four simulation scenarios: free space with noise, room with obstacles and without noise, high-voltage substation without noise and high-voltage substation with noise. The performance of the hybrid technique was inferior to that of the location techniques that depend only on the time-of-arrival, the accuracy is not as affected by multipath. However, the estimate provided by the hybrid technique proves useful as an initial condition for non linear time-of-arrival non linear technique.
Uma forma de diagnosticar o nível de degradação de isolamentos elétricos consiste em identificar a ocorrência de descargas parciais (DP). A detecção precoce de defeitos em isolamentos viabiliza a programação de atividades de manutenção de equipamentos elétricos de potência. Dessa forma, o sistema elétrico pode operar de forma mais confiável e com um número menor de interrupções. Além da detecção, as informações fornecidas pelos pulsos de descargas parciais permitem a localização da sua fonte. Neste trabalho, o principal objetivo é desenvolver uma técnica híbrida de localização, baseada nos instantes de chegada e nas energias dos sinais de DP. O desempenho da técnica híbrida foi comparado com o de outras três técnicas radiométricas de localização. Para este propósito, os métodos usados para estimar os instantes de chegada dos pulsos de DP e as técnicas de localização estão explicados em detalhes. A fim de realizar as simulações deste trabalho, foi desenvolvido um modelo de traçado de raios, que é capaz de simular a propagação dos pulsos de ondas em ambientes definidos por mapas. Os resultados deste trabalho foram obtidos a partir de quatro cenários de simulação: espaço livre com ruído, sala com obstáculos e sem ruído, subestação de alta tensão sem ruído e subestação de alta tensão com ruído. O desempenho da técnica híbrida foi inferior ao desempenho das técnicas de localização que dependem apenas dos instantes de chegada, cuja precisão não é tão afetada pelo multipercurso. No entanto, a estimativa fornecida pela técnica híbrida se mostrou útil como condição inicial para o sistema linear de uma das técnicas e localização pelos instantes de chegada.

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Tamburini, Caterina. "Reingegnerizzazione dei processi di Field Service. L'introduzione di Salesforce in Celli Group." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2021.

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Le aziende che si approcciano al mondo del business contemporaneo si trovano coinvolte in una costante sfida alla ricerca di nuovi possibili acquirenti per mantenere alto l’interesse della propria clientela corrente. Le prime compagnie innovatrici hanno iniziato a farsi strada nello sviluppo di software con la capacità di immagazzinare dati in grande dimensione e successivamente analizzarli tramite metodi statistici, al fine di mantenere un collegamento diretto con i clienti fino ad arrivare ad un vero e proprio approccio di Customer-Relationship Management. Ad oggi, l’adozione di politiche aziendali volte a porre il cliente al centro è una priorità. Tuttavia, nonostante viviamo nell’era dell’informazione, introdurre o sostituire un sistema informativo è uno dei progetti IT più complessi per un’azienda. Numerosi sono i fattori tecnici e umani che l’azienda deve prendere in considerazione e gestire con attenzione, ad esempio la giusta scelta del software, la valutazione della propria organizzazione in termini di flussi e attività e la disponibilità al cambiamento da parte degli utenti finali. L’elevato rischio di fallimento cui è soggetto un progetto di questo tipo comporta la necessità da parte dell’azienda di condurre una meticolosa supervisione tanto dei costi quanto dei tempi, ed è per tale motivo che le fasi di analisi che precedono la fase di implementazione sono sempre cruciali. Le peculiarità di un tale progetto sono molteplici ed in questa tesi verrà analizzata l’implementazione di un applicativo CRM basato su software open source presso l'azienda Celli Group, leader nel settore degli impianti e accessori per la spillatura di bevande, mostrando come soluzioni di questo tipo possano essere utilizzate in ambiti aziendali e personalizzati in base alle richieste, aumentando la produttività di tutti gli utenti coinvolti e la facilità con cui vengono volte le operazioni attraverso questo sistema.

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Hicks, David Cyprian. "Aligned Continuous Cylindrical Pores Derived from Electrospun Polymer Fibers in Titanium Diboride." Thesis, Virginia Tech, 2019. http://hdl.handle.net/10919/99423.

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The use of electrospun polystyrene (PS) fibers to create continuous long range ordered multi-scale porous structures in titanium diboride (TiB2) is investigated in this work. The introduction of electrospun PS fibers as a sacrificial filler into a colloidal suspension of TiB2 allows for easy control over the pore size, porosity, and long range ordering of the porous structures of the sintered ceramic. Green bodies were formed by vacuum infiltrating an electrospun-fiber-filled mold with the colloidal TiB2 suspension. The size, volume, distribution, and dispersion of the pores were optimized by carefully selecting the sacrificial polymer, the fiber diameter, the solvent, and the solid content of TiB2. The green bodies were partially sintered at 2000 C in argon to form a multiscale porous structure via the removal of the PS fibers. Aligned continuous cylindrical pores were derived from the PS fibers in a range of ~5 - 20 μm and random porosity was revealed between the ceramic particles with the size of ~0.3 - 1 μm. TiB2 near-net-shaped parts with the multi-scale porosities (~50 to 70%) were successfully cast and sintered. The multi-scale porous structure produced from electrospun fibers was characterized both thermally and mechanically, at room temperature. The conductivity ranged from 12-31 W m^(-1) K^(-1) at room temperature and the compressive strength ranged from 2-30 MPa at room temperature. Analytical thermal and mechanical models were employed to understand and verify he processing-structure-properties relationship. Finally, a method was devised for estimating the effective thermal conductivity of candidate materials for UHTC applications at relevant temperatures using a finite difference model and a controlled sample environment. This low-cost processing technique facilitates the production of thermally and mechanically anisotropic structures into near-net shape parts, for extreme environment applications, such as ultra high temperature insulation and active cooling components.
MS

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Andersson, Miranda. "Ung och gay : Informationsbehovet som ung och homo- eller bisexuell i komma-ut-processen." Thesis, Högskolan i Borås, Institutionen Biblioteks- och informationsvetenskap / Bibliotekshögskolan, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:hb:diva-18673.

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The aim of this Master’s thesis is to examine the information needs of gay, lesbian and bisexual adolescents’ when they are coming out. I also examine what kind of information they seek and where they might find this information. The purpose is also to examine what role the public or school library plays. The study is conducted through qualitative interviews with gay, lesbian and bisexual adolescents’. The theoretical framework includes studies about information needs and information use. The results indicate that there is evident information needs at the coming-out-stadium. The information sought is of many different kinds, including gay fiction and also webpage’s containing gay information. Gay fiction is, among other things, used for finding an identity, which can be hard to find in a society where the heterosexual identity is the norm. The questions I am working with are: How do homo- or bisexual adolescents’ information needs look like during the coming-out-process? What information sources have been used and how were they used? What purpose has the public library in seeking for information? and What problems has the informants come across in their seeking for information? The results that were found indicate that there is in evident need for information for the adolescents’, the sources that were used was mostly Internet but also books and the library. Among the problems that the informants came across were the lack of information and also the age of the information.
Uppsatsnivå: D

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Hjort, Caroline, and Wojcik Malin Lindblad. "Prostitution : En litteraturstudie om kvinnors egna berättelser gällande processen in och ut ur prostitution." Thesis, Högskolan Dalarna, Socialt arbete, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:du-29672.

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Studiens syfte var att ta reda på mer om kvinnor i prostitution, främst om processen in och ut ur prostitution. Detta gjordes genom att läsa fyra böcker innehållande biografiskt material, tre böcker var skrivna av författarna själva och den fjärde av två författare som intervjuat prostituerade kvinnor. Empirin analyserades med tematisk analys och genus och stigma användes som teoretiska perspektiv och tolkningsramar. Resultaten visade att faktorer som ekonomi, traumatiska händelser och självhat utgjorde de största anledningarna till att man började prostituera sig och att utträdet ur prostitution var avhängigt faktorer såsom tiden, relationer och samhällets bemötande. Slutsatserna är att det inte är någon särskild personlighetstyp som blir prostituerad utan att det beror på flera samverkande omständigheter, därför är förebyggande insatser viktiga. Det är också lättare att sluta med hjälp av någon, exempelvis professionella aktörer.
The aim of the study was to learn more about women in prostitution, mainly about the process in and out of prostitution. Four books containing biographical material were read, three were written by the authors themselves and the fourth by two authors who interviewed female prostitutes. The empirical study was analyzed with thematic analysis and gender and stigma was used as theoretical perspectives and interpretation frames. The results showed that factors such as economics, traumatic events and self-hatred were the main reasons for entering prostitution, and that exiting prostitution was dependent on factors such as time, relationships and the treatment of society. The conclusion is that it is not a particular personality type that enters prostitution but it being due to several collaborative circumstances, therefore preventive efforts are important. It is also easier to quit with the help of someone, such as professional helpers.

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Brousseau, Christian. "CARACTERISATION LARGE BANDE DE FREQUENCE : APPLICATION AU RADAR ET AU SONDAGE DE CANAL." Habilitation à diriger des recherches, Université Rennes 1, 2005. http://tel.archives-ouvertes.fr/tel-00085138.

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Dans ce mémoire sont résumés mes travaux de recherche dans le domaine de la caractérisation large bande de fréquence. Après une présentation des techniques large bande, deux applications sont décrites : le cas du radar pour l'étude de la SER de cibles aériennes en vue de leur identification, et le cas des systèmes de radiocommunications, l'étude et la modélisation du canal de propagation. Ce mémoire se décompose donc en deux parties principales.
La première est consacrée au développement de systèmes radars HF – VHF à large bande de fréquence et à diversité de polarisation pour la classification et l'identification de cibles aériennes. Deux approches sont étudiées, une multifréquence et l'autre à balayage de fréquence. Dans un premier temps, les systèmes utilisant ces techniques, ainsi que leurs performances, sont décrits. Des exemples de mesures de SER d'avions non coopératifs sont présentés.
Les méthodes d'identification de cibles reposent généralement sur la comparaison de mesures à une base de données. Dans un second temps, les méthodes numériques utilisées pour la simulation de SER sont décrites et analysées. Dans un troisième temps, les méthodes d'identification développées sont présentées, discutées et illustrées par des résultats d'identification sur des cibles réelles.
Dans la deuxième partie sont regroupés mes travaux sur la caractérisation large bande de fréquence et la modélisation du canal de propagation. Les différents chapitres de cette partie s'organisent en fonction de la fréquence. On trouve tout d'abord la bande HF dans laquelle un modèle de prévisions de propagation a été développé afin d'évaluer le comportement large bande du canal. Différentes applications, telles que la réactualisation et la localisation à station unique, illustrent cette partie. Dans la bande UHF, des travaux ont été menés sur la caractérisation du canal de propagation radio-mobile et le développement de nouveaux outils de sondage.
Des campagnes de mesures ont été menées à l'aide d'un sondeur à corrélation glissante SIMO (Single Input – Multiple Output) en milieu urbain. La technique de mesure par balayage de fréquence a aussi été étudiée par le développement d'un nouveau sondeur, l'objectif étant de réaliser un équipement MIMO (Multiple Input – Multiple Output) permettant la mesure simultanée de tous les canaux de propagation.
Dans la bande EHF, le canal étudié concerne les applications des radars dans le domaine de l'automobile. Des mesures ont été réalisées et un modèle de propagation en est déduit. La caractérisation du canal s'est appuyée sur un analyseur de réseau vectoriel. La méthodologie est explicitée et des comparaisons entre les simulations et les mesures sont présentées.
La dernière partie conclut en effectuant un bilan provisoire de mes activités et en présentant les perspectives de mon travail sur la caractérisation à large bande de fréquence dans le domaine du radar et du sondage de canal. Enfin, une liste des mes publications, des différents encadrements, des contrats de recherche sur lesquels j'ai travaillé, de mes activités pédagogiques et administratives et des fonctions électives et autres responsabilités, est donnée.

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Franzén, Jennie, and Linda Norling. "Från avvikelse till inkludering : Arbetsförmedlingens syn på processen med att få ut funktionshindrade i arbetslivet." Thesis, Högskolan i Borås, Institutionen för Pedagogik, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:hb:diva-20435.

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Vårt syfte med denna kandidatuppsats är att undersöka svårigheter eller möjligheter som de anställda på Arbetsförmedlingen upplever kring de hjälpmedel som finns tillgängliga för att få ut en funktionshindrad i arbetslivet. Vi har i vårt arbete tittat på en specifik Arbetsförmedling där de anställda har olika yrkesområden för att få en bredare bild av arbetet med funktionshindrade. Vi har valt att göra en kvalitativ studie med semistrukturerade intervjuer för att samla in vårt empiriska material.Begreppen arbetsförmåga och anställningsbarhet är komplexa begrepp men det är ändå dessa som sätter grunden för om en person ska få lönebidrag eller inte. Lönebidraget, i likhet medfunktionshinderkoden, är ett hjälpmedel som Arbetsförmedlingen använder sig av i arbetetmed att få ut funktionshindrade i arbetslivet. För att som funktionshindrad få ta del av de hjälpmedel som finns är det nödvändigt att den funktionshindrade erhåller och accepterar sinfunktionshinderkod. Arbetsgivaren bestämmer emellertid på arbetsmarknaden och avgör omden vill anställa eller inte. Vi har teoretiskt adresserat frågan utifrån Foucaults maktperspektiv för att belysa hur disciplin och övervakning verkar i samhället för att skapa en ordning och en hierarki som medför att Arbetsförmedlingens arbete till vissa delar begränsas. Arbetsförmedlingen fungerar som en mellanhand mellan statens maktutövning, arbetsgivarens vilja att anställa och den arbetssökande. Vårt resultat visar att funktionshinderkoden kanfungera dels stärkande men dels också göra individen mer funktionshindrad. Vi finner häräven stöd hos Goffmans stigmatiseringsteori som innefattar att människor i olika socialasituationer kategoriserar in andra i grupper som inte hör till normen.
Program: Organisations- och personalutvecklare i samhället

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Fernandes, William Douglas Costa. "Predição e medição de sinais de TV digital na faixa de UHF em ambientes internos." Universidade Tecnológica Federal do Paraná, 2012. http://repositorio.utfpr.edu.br/jspui/handle/1/516.

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Este trabalho apresenta uma análise da propagação de sinais de TV Digital na faixa de UHF em ambientes internos. A partir da comparação de alguns modelos de propagação interna e externa referenciados na literatura para outras faixas de frequência e aplicação, um algoritmo foi desenvolvido com a finalidade de gerar um mapa de cobertura de sinal que exibe a potência de recepção no ambiente interno. Estas simulações foram comparadas com medidas em campo a partir de dois estudos de caso. O primeiro avalia a cobertura de sinal em um andar inteiro de um prédio e o segundo no interior de uma sala e comprovou-se que os modelos de propagação que foram estendidos à faixa de UHF podem ser empregados com precisão para se determinar o nível de recepção do sinal de TV digital.
This work presents an analysis of signal propagation of Digital TV on the UHF range in indoor environments. Based on the comparison of some indoor and outdoor propagation models described on the literature, an algorithm was developed with the aim of generating a signal coverage map that exhibits the reception power on the indoor environment. These simulations were compared with field measurements divided in two case studies. The first one evaluates the signal coverage in an entire floor of one building and the second one inside a single room. It was proved that the propagation models that were extended to the UHF range can be used with high accuracy to determine the reception power level of the digital TV signal.

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Larsson, Emmaliz, and Lisa Lundblad. "Kommunikation mellan myndigheter och småskaliga vattenkraftägare : Hur ser kommunikationen ut gällande processen att ompröva vattenkraften enligt moderna miljövillkor?" Thesis, Södertörns högskola, Miljövetenskap, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:sh:diva-44651.

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The majority of water bodies in Sweden have a lower than desirable environmental status. Sweden has many hydropower plants that operate on old, or completely without, a permit. A government decision has been taken to re-trial all hydropower starting in 2022 so that after the process is completed, all power plants will have a permit containing modern environmental conditions. For this environmental modernisation to be carried out with the best possible outcome, communication between government employees and hydropowerplant owners is required. This paper has investigated the communication regarding the re-trialprocess between authorities and owners of small-scale hydropower plants. How is symmetrical or asymmetric communication experienced and are there any additional limiting or enabling factors influencing communication? The thesis is limited to investigating hydropower plants and authorities located in southern and central Sweden. The hydropower plants in the study were not allowed to exceed a capacity of 10 MW as this is the Energy Agency's definition of small-scale hydropower. The overall method approach is qualitative, and the method used to obtain empirical data is semi-structured interviews. The respondents are three persons with key functions employed by executive authorities, as well as seven persons who are owners of small-scale hydropower plants. The results show that there are factors that hinder effective communication and cooperation such as, for the owners, past bad experiences in contact with these authorities. The results also show that communication is an area under development in the authorities. Deficiencies in communication from both parties in the form of misunderstandings have also been identified. Both previous research and the results of the thesis show symmetrical communication in the form of personal meetings is the form of communication that is most effective and appreciated.

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Gustafsson, Fredrik. "Läsförmågan hos barn med mild och måttlig hörselnedsättning : Hur ser sambandet med underliggande kognitiva förmågor ut?" Thesis, Linköping University, Linköping University, Department of Clinical and Experimental Medicine, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-15861.

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While reading in deaf children has been the object of a number of studies, the reading abilitiesof children with mild and moderate hearing impairment and their relation to cognitiveprocessing have not received very much attention. Predictive factors of reading ability inhearing children are well known, with phonological and working memory abilities beingnecessary prerequisites for reading development. Existing studies suggest, however, thatcertain hearing-impaired children achieve a reading level comparable to that of hearingchildren in spite of impaired phonological abilities. In the present study, reading abilities anda range of cognitive processing abilities were measured in a group of hearing-impairedchildren and compared with hearing controls in equivalent school grades. Comparisons weremade at group and school-grade level, and the cognitive profile of hearing-impaired childrenat level with controls (those being within one standard deviation) was discussed. The resultssuggest that phonological abilities are important for the hearing-impaired children, but to alesser extent than for normally hearing children. The results also point towards workingmemoryabilities (particularly correct recall of phonemes in nonword repetition) as beingimportant for the possibility to compensate for impaired phonological abilities.

Emedan döva barns läsande har varit föremål för ett antal studier, har läsförmågan hos barnmed mild och måttlig hörselnedsättning och dennas relation till underliggande kognitiva förmågor inte fått mycket uppmärksamhet. Predicerande faktorer för läsförmågan hos hörande barn är väl kända och fonologisk förmåga och arbetsminneskapacitet utgör oumbärliga förutsättningar för läsutvecklingen. Befintliga studier antyder dock att vissa barn med mildoch måttlig hörselnedsättning uppnår en läsförmåga i nivå med hörande barns, trots nedsatt fonologisk förmåga. I föreliggande studie undersöktes läsförmågan och en rad kognitivaförmågor hos en grupp barn med mild och måttlig hörselnedsättning. Jämförelser gjordes medhörande kontroller på gruppnivå och per årskurs, och den kognitiva profilen hos de barn medhörselnedsättning som låg i nivå med kontrollerna (de som låg inom en standardavvikelse) diskuterades. Resultaten antyder att fonologiska förmågor var viktiga för läsning i sambandmed hörselnedsättning, men i mindre utsträckning än för normalhörande barn. Resultaten antyder också att arbetsminneskapacitet (framförallt korrekt fonemåtergivning vidnonordsrepetition) har betydelse för möjligheten att kompensera en nedsatt fonologiskförmåga.

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Fredriksson, Eva. "”Utan den feministiska kampen, då finns inte jag” : en socialpsykologisk studie av komma ut processen och ett feministiskt engagemang." Thesis, University of Skövde, School of Technology and Society, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:his:diva-3777.

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Den här uppsatsens syfte är att genom ett symboliskt interaktionistiskt och ett social konstruktionistiskt perspektiv öka förståelsen och beskriva komma ut processens samband med feministiskt engagerade lesbiska kvinnor. Den undersöker hur komma ut processen, dvs. den homosexuella identitetsutvecklingen, relaterar till et feministiskt engagemang hos respondenterna. Som teoretisk grund gällande identitetskonstruktion och socialisation har jag främst använt mig av Berger och Luckmann (1991) men även tolkningar av Mead (Berg, 1992; 2007) samt Giddens. För att få en djupare insikt kring kön/genus och sexualitet använder jag mig av Rubin (1984), Rich (1980) och Butler (2007). Jag undersöker i uppsatsen hur komma ut processen upplevs av kvinnorna både inför sig själva och inför deras omgivning. Hur kan det feministiska engagemanget och komma ut processen kopplas samman samt vilka uttryck tar sig detta samspel är också två relevanta frågeställningar i uppsatsen. Resultatet visar att det finn minst två olika sätt där ett politiskt engagemang kan generera en homosexuell identitetsutveckling medan det i det andra fallet förhåller sig tvärtom - komma ut processen blir vägen in i ett feministiskt engagemang för att stärka den homosexuella identiteten samt att hitta likasinnade som bekräftar det lesbiska Självet.

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Doudagiri, Vivek Reddy. "Extracting Temporally-Anchored Knowledge from Tweets." Thesis, University of North Texas, 2018. https://digital.library.unt.edu/ark:/67531/metadc1157588/.

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Twitter has quickly become one of the most popular social media sites. It has 313 million monthly active users, and 500 million tweets are published daily. With the massive number of tweets, Twitter users share information about a location along with the temporal awareness. In this work, I focus on tweets where author of the tweets exclusively mentions a location in the tweet. Natural language processing systems can leverage wide range of information from the tweets to build applications like recommender systems that predict the location of the author. This kind of system can be used to increase the visibility of the targeted audience and can also provide recommendations interesting places to visit, hotels to stay, restaurants to eat, targeted on-line advertising, and co-traveler matching based on the temporal information extracted from a tweet. In this work I determine if the author of the tweet is present in the mentioned location of the tweet. I also determine if the author is present in the location before tweeting, while tweeting, or after tweeting. I introduce 5 temporal tags (before the tweet but > 24 hours; before the tweet but < 24 hours; during the tweet is posted; after the tweet is posted but < 24 hours; and after the tweet is posted but > 24 hours). The major contributions of this paper are: (1) creation of a corpus of 1062 tweets containing 1200 location named entities, containing annotations whether author of a tweet is or is not located in the location he tweets about with respect to 5 temporal tags; (2) detailed corpus analysis including real annotation examples and label distributions per temporal tag; (3) detailed inter-annotator agreements, including Cohen's kappa, Krippendorff's alpha and confusion matrices per temporal tag; (4) label distributions and analysis; and (5) supervised learning experiments, along with the results.

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Olsson, Julia, and Mimmi Rosén. "Stigma, identitet, skam, sociala band och exitprocesser : - En kvalitativ studie om vägen in, tiden i och processen ut ur prostitution." Thesis, Örebro universitet, Institutionen för juridik, psykologi och socialt arbete, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:oru:diva-89280.

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Lif, Elinor, and Maria Nyberg. "Den dubbla utsattheten : En studie som lyfter kvinnors upplevelse av att vara utsatt för intimt partnervåld samt processen att lämna och bli fri - en lång väg in men en längre väg ut." Thesis, Mälardalens högskola, Akademin för hälsa, vård och välfärd, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:mdh:diva-55190.

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Våld i nära relationer är ett världsomfattande problem, där nästan varannan kvinna har utsatts för våld av en man, minst en gång efter sin 15-årsdag. I Sverige har kommunerna det största ansvaret att ge individer rätt stöd och skydd. Dock förekommer stora kunskapsklyftor kring våldet – både mellan kommuner samt inom instanser. Detta kan försvåra processen för kvinnan, då gränserna mellan myndigheterna är stora och hon kan behöva ta upp emot 50 olika myndighetskontakter i sitt hjälpsökande. Syftet med studien är att lyfta fram kvinnors egna upplevelser av att vara utsatta för intimt partnervåld samt belysa den dubbla utsatthet som kan förekomma under hjälpsökandet i kontakten med formella- och informella hjälpkällor. För att uppnå syftet har sex kvinnor intervjuats, där deras egen upplevelse har lyfts fram. Materialet har tillsammans med tidigare forskning samt teoretiska begrepp analyserats, där resultatet uppmärksammade komplexiteten i att leva som våldsutsatt. Resultatet belyser även olika hinder och utmaningar som kan förekomma i mötet med formella- och informella hjälpkällor. Vidare lyfts avgörande faktorer för att kvinnan ska kunna lämna – där våldets karaktär, nyckelpersoner samt kvinnans egna resurser anses avgörande. Slutligen diskuteras resultatet utifrån den dubbla utsattheten samt rättvisans lotteri.

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Avrahami, Dina. "Vi dansar inte på bordet : lesbiska invandrarkvinnor i Sverige : stigmatisering & stolthet /." Ramlösa : Pickabook, 2007. http://www.bibl.liu.se/liupubl/disp/disp2007/arts394s.pdf.

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Diss. Linköping : Linköpings universitet, 2007.
Bilaga innehållande engelsk sammanfattning med titeln: We don't dance on the table : lesbian immigrant women in Sweden : stigmatization & pride. S. 265-284: Bibliografi.

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Tzeng, Wen-Shin, and 曾文信. "The Processing of Tag FM0 Encoding Signals in An EPCglobal Gen2 UHF RFID System." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/98411360291173323967.

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碩士
國立臺灣科技大學
電機工程系
96
In a UHF passive RFID system, a reader transmits an unmodulated continuous wave (CW) to tags, which not only provides energy to tags but also serves as the carrier of tag backscatter signals. The CW usually overwhelms the weak tag backscatter signals, and leads to unrestorable demodulation errors. In this thesis, the FM0 encoded preamble signals in the EPCglobal Gen2 tag-to-reader link is used to acquire the synchronization of tag responses, and to estimate the unmodulated CW. The CW is then suppressed to enhance the tag backscatter signals. Experimental results with various signal-to-noise ratios taken in microwave anechoic chamber are used to verify the scheme. The empirical results are compared with theoretical results, and the differences are discussed.

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Park, Cheol Hee. "Frequency domain processing techniques for continuous phase modulation." Thesis, 2010. http://hdl.handle.net/2152/ETD-UT-2010-12-2297.

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The continuous phase modulation (CPM) has a constant envelope and compact output power spectrum that makes it a promising underlying technology for power and spectrum efficient broadband wireless communications. However, high implementation complexity (especially the complexity of the receiver) required to deal with the phase memory and inter-symbol interference has impeded its adoption for broadband wireless communications, and only a few simple CPM modulation schemes have mainly been used, e.g. binary MSK and GMSK. Thus, research on efficient CPM transceivers to reduce the computational and hardware complexity is important. The major contribution of this dissertation is the development of novel frequency domain processing techniques and transceiver strategies to improve power and spectral efficiency, and reduce the complexity of CPM modulation schemes. First, this dissertation presents simplified frequency domain receiver structures and decoding schemes in the frequency domain for binary and M-ary CPM block transmission. The frequency domain receivers utilize parallel and serial structures with frequency domain processing which considerably reduces hardware and computational complexity compared to conventional time-domain processing. In addition, the decoding schemes in the frequency domain eliminate the controlled phase memory through frequency domain phase equalization instead of maximum-likelihood sequential decoders, e.g. Viterbi decoders. Second, frequency domain channel estimation schemes for CPM block transmission are presented, which adopt superimposed training signals to achieve bandwidth and power efficiency while reducing the complexity. In these schemes, the proposed frequency domain channel estimation uses the superimposed training signals as a reference signal to reduce the throughput loss caused by conventionally multiplexed training signals. Superimposed training signal design is presented, and the trade-off between bandwidth efficiency and power efficiency is also analyzed. Third, block transmission schemes and frequency domain equalization methods for CPM are proposed, which consider linear processing instead of conventional decomposition-based processing. The schemes of frequency domain linear processing avoid the complexity overhead (both in computation and hardware) of conventional orthogonal- or Laurent decomposed-based equalizers. Finally, this dissertation extends CPM block transmission and frequency domain equalization to phase-coded (time-varying modulation index) CPM, which shows better error performance and bandwidth efficiency than fixed modulation index CPM's.
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Arndt, Karl Robert 1981. "Evaluation of a mobile computing platform for image processing." Thesis, 2010. http://hdl.handle.net/2152/ETD-UT-2010-12-2327.

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Many modern mobile applications, such as Unmanned Aerial Vehicles (UAVs), require sophisticated processing capability with low power consumption in a small form factor. UAVs, for example, may require a platform capable of controlling a camera, performing digital signal processing techniques on the pictures to detect faces or motion, and guiding the vehicle based on decisions made from the processed data. Additionally, since the vehicle is mobile and aerial, its effectiveness is heavily dependent on the size and power consumption of the platform. In this report, we explore this set of requirements and how well they are met with a Texas Instruments OMAP SoC on a BeagleBoard. Specifically, we report on the computational performance and power drawn by the OMAP General Purpose Processor (GPP) when performing a facial detection algorithm with OpenCV. We also analyze the performance enhancement possible by offloading the facial detection algorithm to the OMAP DSP coprocessor. In summary we find that the Beagleboard would be an appropriate platform for a simpler UAV capable of pre-processing still images taken every few seconds, but not for processing video data real-time. We conclude by describing other applications that are suitable for the Beagleboard.
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Cox, Blair Jeffrey. "Depolymerization of lignin for biomass processing in ionic liquids." Thesis, 2012. http://hdl.handle.net/2152/ETD-UT-2012-12-6523.

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There is growing need for technologies to displace traditional petroleum resources. Towards this goal, lignocellulosic biomass is seen as a potential renewable resource for the production of fuels and commodity chemicals. One of the most difficult components of lignocellulose to process is lignin, which is a complex, amorphous aromatic polymer that acts as one of the structural components in plants. Ionic liquids are a class of compounds that are composed completely of anions and cations that, in some cases, can completely dissolve lignocellulosic biomass. The research performed for this dissertation aims to advance the technologies of lignocellulose processing through effective depolymerization of lignin in ionic liquids. Lignin fragments from this depolymerization could be used as a feedstock for further processing into aromatic commodity chemicals or polymers. Additionally, by removing lignin, biomass becomes much more accessible to enzymatic or chemical saccharification as a step towards fermentation into ethanol or other fuels. Both base and acid catalyzed methods were explored, although the base promoted depolymerization of lignin in ionic liquids did not show much promise, as the reaction was never shown to be catalytic. Acidic routes towards lignin depolymerization were more successful. Using the acidic ionic liquid 1-H-3-methylimiazolium chloride, the ether linkages in lignin model compounds could be hydrolyzed with high yields. This technology was also applicable to the whole lignin macromolecule. The mechanisms of this reaction, as well as the effects on lignin were explored with various neutral and acidic ionic liquids, using HPLC, GPC, NMR, FT-IR, and mass spectrometry for analysis of samples. To demonstrate the applications of this technique, pine wood was treated with the acidic ionic liquids to open the structure of the wood to enzymatic saccharification through the removal of lignin and hemicellulose.
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Souza, André Luiz Elias de. "Modality-specific effects of processing fluency on cognitive judgments." Thesis, 2012. http://hdl.handle.net/2152/ETD-UT-2012-05-5235.

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Fluency of processing – the ease with which one extracts information from stimuli – affects a variety of cognitive processes over and above the influence of declarative content. Although this influence has been extensively demonstrated in a variety of different domains (Alter & Oppenheimer, 2009), there are virtually no studies exploring this effect with auditory material. Moreover, although research on modality differences suggests that people process auditory information differently than they process visual or written information (Conway & Gathercole, 1987; Markman, Taylor & Gentner, 2007), there are no studies that directly compare the effects of processing fluency on judgments across different modalities. The current dissertation reports two sets of studies, one investigating the effects of processing fluency on cognitive judgments in the auditory modality, and a second exploring cross-modal differences in processing fluency. The first set of studies showed that although foreign-accented speech is more difficult to process, this disfluency does not affect cognitive judgments. In the second set of studies, two experiments show that disfluency in processing affects judgments of truth (Experiment 1) and the intention to purchase a product (Experiment 2) only with written – non-verbal – material. Experiment 3 investigates one possible explanation for the limited influence of processing fluency in speech: because people tend to focus on conceptual information over low-level acoustic information when processing language (Lahiri & Marslen-Wilson, 1991; Gow & Gordon, 1995; Mattys, White & Melhorn, 2005; Norris, McQueen & Cutler, 1995), distortions to the superficial features of the speech signal is likely to have limited impact on how people process the conceptual content. In Experiment 3 participants are primed to attend to the superficial features of foreign-accented speech. The results showed that when people are primed to attend to features that make foreign-accented speech difficult, non-native speech has an impact on subsequent judgments of truth. Overall, the studies presented here show that listeners can extract content from speech, even when it is distorted. They also show that when attention is directed to low-level acoustic features of speech, processing fluency effects becomes apparent.
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Malladi, Srinivas. "Mechanistic insights into apoptosome dependent caspase-9 processing and activation." Thesis, 2010. http://hdl.handle.net/2152/ETD-UT-2010-05-791.

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During stress-induced apoptosis, the initiator caspase-9 is activated by the Apaf-1 apoptosome and must remain bound in order to retain significant catalytic activity. Nevertheless, in apoptotic cells, the vast majority of processed caspase-9 is paradoxically observed outside of the complex. We demonstrate herein that apoptosome-mediated cleavage of procaspase-9 occurs exclusively through a CARD-displacement mechanism, so that unlike the effector procaspase-3, procaspase-9 cannot be processed by the apoptosome as a typical substrate. Indeed, procaspase-9 possessed higher affinity for the apoptosome and could displace processed caspase-9 from the complex, thereby facilitating a continuous cycle of procaspase-9 recruitment/activation, processing, and release from the complex. Due to its rapid autocatalytic cleavage, however, procaspase-9 per se contributed little to the activation of procaspase-3. Thus, the Apaf-1 apoptosome functions as a proteolytic-based “molecular timer”, wherein the intracellular concentration of procaspase-9 sets the overall duration of the timer, procaspase-9 autoprocessing activates the timer, and the rate at which processed caspase-9 dissociates from the complex (and thus loses its capacity to activate procaspase-3) dictates how fast the timer “ticks” over. To understand the physiological relevance of molecular timer in vivo, we are currently generating caspase-9 knock-in mouse models. These mouse models will enhance our understanding of the importance of caspase-9 processing within the apoptosome.
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Yin, Xiaoli. "Flame retardant polyamide 6 nanocomposites and nanofibers : processing and characterization." Thesis, 2012. http://hdl.handle.net/2152/ETD-UT-2012-05-5683.

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Polyamide 6 (PA6) was melt-blended with an intumescent flame retardant (FR) and nanoparticles (multi-wall carbon nanotubes [MWNTs] and nanoclays) to produce multi-component FR-PA6 nanocomposites. Thermal, flammability properties, char residue morphology, and mechanical properties of FR-PA6 nanocomposites were characterized. The flame retardant properties were enhanced according to UL 94 and microscale combustion calorimeter (MCC) measurements, whereas the thermal stability was decreased. Mechanical properties of the bulk material, especially elongation at break, were severely reduced, with the exception of tensile modulus which increased significantly. FR-PA6 nanofibers were processed via electrospinning. Electrospinnability, morphology of the nanofibers, combustion, and thermal properties were also analyzed. As for the bulk-form nanocomposite, improved combustion properties of these nanofibers were successfully achieved though thermal stability was compromised. With proper FR additive, the synergism between MWNTs and nanoclays was observed in PA6 resin.
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Nahar, Manuj 1985. "Highly conductive, nanoparticulate thick films processed at low processing temperatures." Thesis, 2012. http://hdl.handle.net/2152/ETD-UT-2012-08-5967.

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Applications such as device interconnects require thick, patterned films that are currently produced by screen printing pastes consisting of metallic particles and subsequently sintering the films. For Ag films, achieving adequate electrical conductivity requires sintering temperatures in excess of 700˚C. New applications require highly conductive films that can be processed at lower processing temperatures. Although sintering temperatures have been reduced by utilizing finer nanoparticles (NPs) in place of conventional micron-size particles (MPs), realization of theoretically achievable sintering kinetics is yet to be achieved. The major factors that inhibit NP sintering are 1) the presence of organic molecules on the NP surfaces, 2) the dominance of the non-densifying surface diffusion over grain boundary or lattice diffusion 3) agglomeration of NPs, and 4) low initial density of the NPs. Here, we report a film fabrication technique that is capable of eliminating these deleterious factors and produces near fully dense Ag films that exhibit an order of magnitude higher conductivity when compared to other film fabrication techniques at processing temperatures of 150 – 250 °C. The observed results establish the benefits of NP diffusion kinetics to be far more profound when the deleterious factors to sintering are eliminated. The sintering behavior exhibits two distinct temperature regimes – one above 150 ᵒC where grain boundary diffusion-dominated densification is dominant and one below 100 ᵒC where surface diffusion-dominated coarsening is dominant. An analytical model is developed by fitting the experimental data to the existing models of simultaneous densification and grain growth, and combining this model with existing models of the dependence of conductivity on grain boundary scattering and pore scattering. The combined model successfully describes the evolution of density, grain size and conductivity of nanoparticulate films as a function of annealing treatment, with reasonable accuracy. The model was also used to evaluate the effect of initial NP size and initial relative density of films on the final sintered properties and conductivity of films.
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Vallabhajosyula, Phani Charana Devi. "Selective laser sintering and post-processing of fully ferrous components." Thesis, 2011. http://hdl.handle.net/2152/ETD-UT-2011-05-3301.

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Indirect additive processing of ferrous metals offers the potential to freeform fabricate parts with good surface finish and minimal dimensional variation from the computer solid model. The approach described here is to mix a ferrous powder with a transient binder followed by selective laser sintering (SLS) in a commercial polymer machine to create a “green” part. This part is post-processed to burn off the transient binder and to infiltrate the porous structure with a lower melting point metal/alloy. Commercially available SLSed ferrous components contain copper-based infiltrant in a ferrous preform. The choice of copper alloy infiltrant has led to inferior mechanical properties of these components limiting their use in many non-injection-molding structural applications, particularly at elevated temperature. In the present work, an attempt has been made to replace the copper-based infiltrant considering cast iron as a potential infiltrant because of its fluidity, hardness and stability at comparatively high temperature. A critical consideration is loss of part structural integrity by over-melting after infiltration as chemical diffusion of alloying elements, principally carbon, occurs resulting in a decrease in the melting temperature of tool steel preform. A predictive model was developed which defines the degree of success for infiltration based on final part geometry and depending on the relative density of the preform and infiltration temperature. The processing regime is defined as a function of controllable process parameters. An experimental program was undertaken using commercially available LaserForm[superscript tm] A6 tool steel that was infiltrated with ASTM A532 white cast iron. Guided by Ashby densification maps, pre-sintering of the A6 tool steel SLS part was performed to increase the part initial relative density prior to infiltration. The final infiltrated parts were analyzed for geometry, microstructure and hardness. The model may be extended to other ferrous powder and infiltrant compositions in an effort to optimize the properties and utility of the final infiltrated part.
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Moriarty, Kirsten Elizabeth. "Lexical influence on phonological processing in adults with and without stuttering." Thesis, 2011. http://hdl.handle.net/2152/ETD-UT-2011-05-3124.

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Purpose: The purpose of this study was to investigate how phonetic complexity influences the accuracy and rate of speech production in adults who do (AWS, N=15) and do not stutter (AWNS, N=15). Target words were characterized according to high phonetic complexity (HIPC) and low phonetic complexity (LIPC), and were controlled for lexical influences such as word frequency and neighborhood density. It was hypothesized that if phonetic complexity influenced speech production, there would be a difference in reaction time and accuracy for AWS during the HIPC condition. Method: Participants produced two rounds of 40 target words corresponding to specific line drawings, during a confrontational naming task. Speech reaction time (SRT) was recorded from initial presentation of picture, and fluency and accuracy of production were coded for each target. Results: There was no significant difference in SRT according to HIPC and LIPC for either AWS or AWNS. AWS participants had slower SRT recorded compared to AWNS for all conditions tested. There was no relationship found between HIPC and increased moments of disfluency. Accuracy of target word production decreased during LIPC words. Conclusion: Phonetic complexity does not affect rate or fluency of speech production for either AWS or AWNS. While there is no difference in phonetic complexity measures, AWS are consistently slower than AWNS across both groups of target productions. Increased errors for both groups on LIPC target words may indicate a motor component to accuracy of speech production.
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Doblar, Peter Anthony. "Laser line scanning processing system for wrinkling in nation during coating." Thesis, 2011. http://hdl.handle.net/2152/ETD-UT-2011-05-3096.

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One of the major limiting factors in fuel cell production is the time and effort that are required in the ink coating process of the Nafion film that is at the heart of what makes a fuel cell work. The principle reason that this issued has not been tackled by the industry at large is the inherent difficulties that arise. First and foremost is the rapid and extensive expansion of the material upon contact with the liquid ink causing the Nafion film to wrinkle while being processed. In the drive to help mitigate this issue it must be understood by what conditions and severity that wrinkling occurs. The method chosen to detect this was to develop a laser profile scanner to record and output the severity of any wrinkles present in the film. This thesis showcases and explains the laser scanning system designed specifically for this problem and material.
Mechanical Engineering
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Zhou, Li doctor of microbiology. "Mechanistic analysis of selective inhibition of RNA processing in Escherichia coli." Thesis, 2010. http://hdl.handle.net/2152/ETD-UT-2010-08-1691.

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In Escherichia coli, the RNA degradosome is a protein complex involved in the general degradation of mRNA and in post-transcriptional gene regulation. The principal components of the degradosome complex are the endoribonuclease RNase E, the phosphorolytic exoribonuclease PNPase, the ATP-dependent RNA helicase RhlB, and the glycolytic enzyme enolase. The RNase E protein is a 1061 amino acid protein which can be divided into three major functional portions: the N-terminal catalytic activity portion; the central membrane anchoring and RNA binding portion; and the C terminal protein-interaction portion which bind to other major degradosome components. RraA and RraB (Regulator of RNase E activity) are protein regulators of RNase E discovered in our lab, which regulate RNase E by binding to the RNase E C-terminal region. The work presented here describes the regulation of rraB gene expression and in vitro studies of degradosome assembly and the effects of RraA/RraB inhibition. rraB is transcribed from its own promoter PrraB. A transposon insertion into glmS encoding glucosamine-6P synthase resulted in a 4 fold increase in the PrraB activity from a PrraB-lacZ fusion the indicating that glmS is serves as a negative regulator of rraB transcription. Consistent with this discovery, real-time RT-PCR revealed that glmS::Tn5 results in a 5-fold increase on the steady-state level of rraB mRNA. As part of this work we have reconstituted the degradosome from individually purified proteins. The binding sites of RraA and RraB overlap with the RNA binding and the RhlB interaction sites within the C-terminus of RNase E. We have characterized the effects of RraA and RraB on the decay of various RNA substrates by reconstituted degradosomes: RraA and RraB proteins were shown to inhibit the hydrolysis reaction a short substrate by RNase E by up to 50% in a mixed inhibition pattern. Inhibition of the decay of the long RNA substrates RNA1 or dsbC was much more severe with the RNA processing activity becoming reduced by as much as 80%. These studies have delineated the kinetic consequences of inhibition by RraA and RraB and provide further insights into the mechanisms that control RNA decay in bacteria.
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He, Ku 1982. "Adaptive low-energy techniques in memory and digital signal processing design." Thesis, 2012. http://hdl.handle.net/2152/ETD-UT-2012-05-5424.

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As semiconductor technology continues to scale, energy-efficiency and power consumption have become the dominant design limitations, especially, for embedded and portable systems. Conventional worst-case design is highly inefficient from an energy perspective. In this dissertation, we propose techniques for adaptivity at the architecture and circuit levels in order to remove some of these inefficiencies. Specifically, this dissertation focuses on research contributions in two areas: 1) the development of SRAM models and circuitry to enable an intra-array voltage island approach for dealing with large random process variation; and 2) the development of low-energy digital signal processing (DSP) techniques based on controlled timing error acceptance. In the presence of increased process variation, which characterizes nanometer scale CMOS technology, traditional design strategies result in designs that are overly conservative in terms of area, power consumption, and design effort. Memory arrays, such as SRAM-based cache, are especially vulnerable to process variation, where the penalty is a power and bit-cell increase needed to satisfy a variety of noise margins. To improve yield and reduce power consumption in large SRAM arrays, we propose an intra-array voltage island technique and develop circuits that allow for a cost-effective deployment of this technique to reduce the impact of process variation. The voltage tuning architecture makes it possible to obtain, on average, power consumption reduction of 24% iso-area in the active mode, and the leakage power reduction up to 52%, and, on average, of 44% iso-area in the sleep mode. Alternatively, bitcell area can be reduced up to 50% iso-power compared to the existing design strategy. In many portable and embedded systems, signal processing (SP) applications are dominant energy consumers. In this dissertation we investigate the potential of error-permissive design strategies to reduce energy consumption in such SP applications. Conventional design strategies are aimed at guaranteeing timing correctness for the input data that triggers the worst-case delay, even if such data occurs infrequently. We notice that an intrinsic notion of quality floor characterizes SP applications. This provides the opportunity to significantly reduce energy consumption in exchange for a limited signal quality reduction by strategically accepting small and infrequent timing errors. We propose both design-time and run-time techniques to carefully control the quality-energy tradeoff under scaled VDD. The basic philosophy is to prevent signal quality from severe degradation, on average, by using data statistics. We introduce techniques for: 1) static and dynamic adjustment of datapath bitwidths, 2) design-time and run-time reordering of computations, 3) protection of important algorithm steps, and 4) exploiting the specific patterns of errors for low-cost post-processing to minimize signal quality degradation. We demonstrate the effectiveness of the proposed techniques on a 2D-IDCT/DCT design, as well as several digital filters for audio and image processing applications. The designs were synthesized using a 45nm standard cell library with energy and delay evaluated using NanoSim and VCS. Experiments show that the introduced techniques enable 40~70% energy savings while only adding less than 6% area overhead when applied to image processing and filtering applications.
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Dicke, Ian James. "Grand Central for chamber orchestra, live audio processing, and video projections." Thesis, 2012. http://hdl.handle.net/2152/ETD-UT-2012-05-5217.

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Grand Central is a twenty-minute multi-media work for chamber orchestra, live audio processing, and video projections. The piece was commissioned by the San Francisco Conservatory of Music's New Music Ensemble, and will be premiered in March 2013. Composing a multi-media work poses many challenges, including the methodology of how to work with diverse components, the interplay between these elements, and how to best utilize the performance space to its full potential. The work is inspired by my experiences at Grand Central Terminal during my childhood and the musical material is derived from the building’s infrastructure and rich cultural history. The first chapter of this treatise examines the genesis of the composition, Grand Central’s history, and technical considerations related to the integration of technology, orchestration, and staging. The second chapter is encompassed by a thorough movement- by-movement analysis, complete with explanations of pitch derivation, formal principals, and programmatic considerations.
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Shen, Mingjuan. "Characterization of the novel endonuclease Sae2 involved in DNA end processing." Thesis, 2011. http://hdl.handle.net/2152/ETD-UT-2011-08-4169.

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At the very center of sexual reproduction is meiosis. During meiosis, the formation of meiotic Double-Strand-Breaks (DBSs) and their repair by homologous recombination are widely conserved events occurring among most eukaryote species. Meiosis-specific DSB formation requires at least nine proteins (Spo11, Ski8, Rec102, Rec104, Mei4, Mer2, Rec114, Mre11/Rad50/Xrs2) in S. cerevisiae, and the resection of the DSB ends requires additional four proteins (Mre11/Rad50/Xrs2, and Sae2). Spo11 has been identified as the catalytic component of this DSB-initiating complex. However, the roles played by the majority of these proteins are not clear. I have purified the recombinant Spo11/Ski8/Rec102/Rec104 complex, characterized its DNA binding ability as well as its cleavage activity on supercoiled plasmid DNA. Sae2 functions in both meiotic and mitotic repair of DNA double-strand breaks (DSBs) in S. cerevisiae. In vivo experiments have shown that Sae2 collaborates with the Mre11/Rad50/Xrs2 (MRX) complex in DNA end processing. Our laboratory previously showed that recombinant Sae2 exhibits endonuclease activity on single-stranded DNA and single-strand/double-strand DNA junctions using purified proteins in vitro. The MRX complex stimulates Sae2 endonuclease activity on single-stranded DNA close to single-strand/double-strand junctions, through its endonucleolytic activity. However, Sae2 contains no conserved typical nuclease domain, and it only shares very limited homology with its human functional counterpart CtIP. To characterize Sae2 and the active sites responsible for its nuclease activity, I used partial proteolysis and site-directed mutagenesis to analyze the protein. Biochemical assays in vitro show that acidic residues in the central domain play an important role in Sae2 endonuclease activity. Sae2 has also been shown to be phosphorylated by CDK (Cyclin-Dependent Kinase) during the S and G2 phases of the cell cycle, as well as by Tel1/Mec1 upon DNA damage. These modifications are essential for the function of Sae2 in DNA repair, but the function of these modifications are not clear. I have demonstrated that, in the presence of MRX, Sae2 (5D/S267E) mimicking constitutive phosphorylation by CDK and Mec1/Tel1 can assist the 5’ to 3’ exonuclease Exo1 significantly in 5’ end resection by suppressing the inhibitory effect of Ku. These results suggest that Sae2 is a critical switching protein which determines the choice between HR and NHEJ in yeast cells upon DNA damage.
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Ponvert, Elias Franchot. "Unsupervised partial parsing." Thesis, 2011. http://hdl.handle.net/2152/ETD-UT-2011-08-3991.

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The subject matter of this thesis is the problem of learning to discover grammatical structure from raw text alone, without access to explicit instruction or annotation -- in particular, by a computer or computational process -- in other words, unsupervised parser induction, or simply, unsupervised parsing. This work presents a method for raw text unsupervised parsing that is simple, but nevertheless achieves state-of-the-art results on treebank-based direct evaluation. The approach to unsupervised parsing presented in this dissertation adopts a different way to constrain learned models than has been deployed in previous work. Specifically, I focus on a sub-task of full unsupervised partial parsing called unsupervised partial parsing. In essence, the strategy is to learn to segment a string of tokens into a set of non-overlapping constituents or chunks which may be one or more tokens in length. This strategy has a number of advantages: it is fast and scalable, based on well-understood and extensible natural language processing techniques, and it produces predictions about human language structure which are useful for human language technologies. The models developed for unsupervised partial parsing recover base noun phrases and local constituent structure with high accuracy compared to strong baselines. Finally, these models may be applied in a cascaded fashion for the prediction of full constituent trees: first segmenting a string of tokens into local phrases, then re-segmenting to predict higher-level constituent structure. This simple strategy leads to an unsupervised parsing model which produces state-of-the-art results for constituent parsing of English, German and Chinese. This thesis presents, evaluates and explores these models and strategies.
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Allen, Gregory Eugene. "Computational process networks : a model and framework for high-throughput signal processing." Thesis, 2011. http://hdl.handle.net/2152/ETD-UT-2011-05-2987.

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Many signal and image processing systems for high-throughput, high-performance applications require concurrent implementations in order to realize desired performance. Developing software for concurrent systems is widely acknowledged to be difficult, with common industry practice leaving the burden of preventing concurrency problems on the programmer. The Kahn Process Network model provides the mathematically provable property of determinism of a program result regardless of the execution order of its processes, including concurrent execution. This model is also natural for describing streams of data samples in a signal processing system, where processes transform streams from one data type to another. However, a Kahn Process Network may require infinite memory to execute. I present the dynamic distributed deadlock detection and resolution (D4R) algorithm, which permits execution of Process Networks in bounded memory if it is possible. It detects local deadlocks in a Process Network, determines whether the deadlock can be resolved and, if so, identifies the process that must take action to resolve the deadlock. I propose the Computational Process Network (CPN) model which is based on the formalisms of Kahn’s PN model, but with enhancements that are designed to make it efficiently implementable. These enhancements include multi-token transactions to reduce execution overhead, multi-channel queues for multi-dimensional synchronous data, zero-copy semantics, and consumer and producer firing thresholds for queues. Firing thresholds enable memoryless computation of sliding window algorithms, which are common in signal processing systems. I show that the Computational Process Network model preserves the formal properties of Process Networks, while reducing the operations required to implement sliding window algorithms on continuous streams of data. I also present a high-throughput software framework that implements the Computational Process Network model using C++, and which maps naturally onto distributed targets. This framework uses POSIX threads, and can exploit parallelism in both multi-core and distributed systems. Finally, I present case studies to exercise this framework and demonstrate its performance and utility. The final case study is a three-dimensional circular convolution sonar beamformer and replica correlator, which demonstrates the high throughput and scalability of a real-time signal processing algorithm using the CPN model and framework.
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Kim, Soohee 1980. "The role of emotion in selective exposure, information processing, and attitudinal polarization." Thesis, 2010. http://hdl.handle.net/2152/ETD-UT-2010-05-1077.

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This thesis reviews the role of emotions in one’s choice of information, information processing, and political attitudes. Theoretical and empirical endeavors to date have focused primarily on how emotions influence attitudes and information processing, leaving the actual processes guiding these outcomes in the margins. Specifically, it has been largely unexplored how emotions influence individuals’ information search behavior and then attitudes and information processing. Noting that the purposeful selection of likeminded information, often referred to as selective exposure, is commonly enacted when an individual first initiates information processing, and is also likely influenced by emotions, this study explores how emotions may affect people’s tendency to seek out congruent information. In addition, this study examines how the relationship between emotions and selective exposure in turn may affect aspects of information processing and attitudes. By designing an online experiment, I first tested how certain negative emotions (anger/fear) affected one’s pursuit of certain types of information (consistent/inconsistent) and second, I investigated how these emotions and information selections influenced subsequent information processing and attitudes. Results showed that while anger motivated more likeminded exposure for Republicans than fear, fear promoted more likeminded exposure for Democrats than anger. Further, anger prompted people to process messages more closely and to develop more polarized attitudes compared to fear. In addition, pro-attitudinal exposure produced more message-relevant thoughts for Republicans than counter-attitudinal message exposure, while it was counter-attitudinal exposure that yielded more message-relevant thoughts for Democrats. No such effect, however, was shown for attitudinal polarization.
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Mazzetti, Francesco. "Why dichotomize? : the combined effects of abstract and concrete processing on rumination." Thesis, 2010. http://hdl.handle.net/2152/ETD-UT-2010-12-2079.

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This report examines the affects of different types of thinking on rumination. Because of the relationship between rumination and psychopathology, many researchers have attempted to understand what types of processing end the ruminative cycle. Some researchers have proposed that thinking concretely (i.e. the specific details of events) will end rumination. These same researchers argue that thinking about events from an abstract perspective (general meaning of an event) is detrimental. However, several recent studies have shown that abstract processing under certain conditions can be beneficial. Though both sides of the debate discuss abstract and concrete as existing within a hierarchy, research to date has only treated these levels dichotomously. Adopting a Goal Progress Theory perspective, this report proposed a study that asks participants to traverse through multiple level of the construal hierarchy, and argues for the benefits of combining both abstract and concrete processing.
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Daruru, Srivatsava. "Dataflow parallelism for large scale data mining." Thesis, 2010. http://hdl.handle.net/2152/ETD-UT-2010-08-1838.

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The unprecedented and exponential growth of data along with the advent of multi-core processors has triggered a massive paradigm shift from traditional single threaded programming to parallel programming. A number of parallel programming paradigms have thus been proposed and have become pervasive and inseparable from any large production environment. Also with the massive amounts of data available and with the ever increasing business need to process and analyze this data quickly at the minimum cost, there is much more demand for implementing fast data mining algorithms on cheap hardware. This thesis explores a parallel programming model called dataflow, the essence of which is computation organized by the flow of data through a graph of operators. This paradigm exhibits pipeline, horizontal and vertical parallelism and requires only the data of the active operators in memory at any given time allowing it to scale easily to very large datasets. The thesis describes the dataflow implementation of two data mining applications on huge datasets. We first develop an efficient dataflow implementation of a Collaborative Filtering (CF) algorithm based on weighted co-clustering and test its effectiveness on a large and sparse Netflix data. This implementation of the recommender system was able to rapidly train and predict over 100 million ratings within 17 minutes on a commodity multi-core machine. We then describe a dataflow implementation of a non-parametric density based clustering algorithm called Auto-HDS to automatically detect small and dense clusters on a massive astronomy dataset. This implementation was able to discover dense clusters at varying density thresholds and generate a compact cluster hierarchy on 100k points in less than 1.3 hours. We also show its ability to scale to millions of points as we increase the number of available resources. Our experimental results illustrate the ability of this model to “scale” well to massive datasets and its ability to rapidly discover useful patterns in two different applications.
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Jackson, Ladaun Shereen. "False memories in adults who do and do not stutter." Thesis, 2012. http://hdl.handle.net/2152/ETD-UT-2012-05-5330.

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The purpose of this study was to further explore previously observed differences in phonological processing between adults who do and do not stutter through a list recall task. Three types of lists of words were generated according to their associations with a lure word: phonological, semantic, and hybrid. For the experimental task, participants were instructed to listen to recordings of lists of 12 words, 4 of each type, and immediately recall them in any order. We looked at recall accuracy and rate of production of each list's associated lure word. For recall accuracy, phonological lists were lowest, hybrid lists were in the middle, and semantic lists were highest. For production of the critical lure, phonological lists were the lowest, semantic lists were in the middle, and hybrid lists were highest. The pattern was the same for recall accuracy and critical lure production for both talker groups; however, the adults who stutter had lower means for each condition in both cases. The results provide further evidence that there are systematic and significant differences in the phonological working memory efficiency of AWS and AWNS, which may contribute to fluency differences.
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Salpeter, Garrett Morgan. "Optimization of material composition and processing parameters for hybrid organic-inorganic solar cells." Thesis, 2010. http://hdl.handle.net/2152/ETD-UT-2010-12-2030.

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The widespread adoption of hybrid organic-inorganic solar cells has been delayed by low performance. Improving performance requires a firm understanding of how to optimize both material composition and processing parameters. In this thesis, we examine processing parameters that include solution composition, annealing temperature, and the rates of spin casting and evaporative coating. We also find that the optimal weight ratio for the active layer of a ZnO:P3HT solar cell is 40 wt. % ZnO.
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Ridley, Kristen Paige. "Verbal learning ability after traumatic brain injury : roles of working memory and processing speed." Thesis, 2011. http://hdl.handle.net/2152/ETD-UT-2011-08-4244.

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Learning and memory impairments are among the most common and enduring cognitive consequences of traumatic brain injury (TBI). Researchers have yet to reach a consensus with regard to the basic cognitive mechanism underlying new learning and memory disturbances after TBI. The purpose of the present study was to investigate the current views regarding the cognitive processes thought to explain impairments in verbal learning and memory subsequent to brain injury. Specifically, this study sought to examine the roles of the central executive component of working memory and processing speed in verbal learning ability following TBI. Latent variable structural equation modeling (SEM) was used to analyze the data of 70 post-acute care TBI patients between the ages of 16 and 65, who completed a full neuropsychological evaluation. Results indicated that verbal learning and memory difficulties following TBI were explained primarily in terms of the central executive aspects of working memory, after accounting for the relative contributions of processing speed in the model. The direct effect of processing speed on verbal learning and memory was not significant when working memory was taken into account in the model. Rather, the effects of processing speed on verbal learning ability were largely indirect through the central executive component of working memory. Results highlight the importance of both working memory and processing speed in supporting verbal learning and memory processes after TBI. Practical implications for targeting remediation efforts and directing approaches to memory rehabilitation are discussed in light of the study’s findings.
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Dissertations / Theses on the topic 'UHT processing'

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