Relevant bibliographies by topics / 5250d

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  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
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Academic literature on the topic '5250d'

Author: Grafiati
Published: 4 June 2021
Last updated: 1 February 2022

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Journal articles on the topic "5250d"

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Feltes, Rolf, Ralf Peuker, and Florian Weber. "Gesamtfahrzeug- und Antriebsakustik des neuen BMW 525d." ATZ - Automobiltechnische Zeitschrift 114, no. 1 (January 2012): 8–15. http://dx.doi.org/10.1365/s35148-012-0241-2.

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Deshpande, Ravindra Pramod, Y. B. V. K. Chandra Sekhar, Manas Panigrahi, and Phanithi Prakash Babu. "SIRP Alpha Protein Downregulates in Human Astrocytoma: Presumptive Involvement of Hsa-miR-520d-5p and Hsa-miR-520d-3p." Molecular Neurobiology 54, no. 10 (November 29, 2016): 8162–69. http://dx.doi.org/10.1007/s12035-016-0302-8.

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Ishihara, Yoshitaka, Satoshi Tsuno, Satoshi Kuwamoto, Taro Yamashita, Yusuke Endo, Junichi Hasegawa, and Norimasa Miura. "Hsa-miR-520d Converts Fibroblasts into CD105+ Populations." Drugs in R&D 14, no. 4 (October 11, 2014): 253–64. http://dx.doi.org/10.1007/s40268-014-0064-6.

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Reyes, Fernando, Jaime Cid, Miguel Angel Limon, and Manuel Cervantes. "Square Root - Type Control for Robot Manipulators." International Journal of Advanced Robotic Systems 10, no. 1 (January 2013): 39. http://dx.doi.org/10.5772/52500.

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Li, Xinde, Xiulong Zhang, Bo Zhu, and Xianzhong Dai. "A Visual Navigation Method of Mobile Robot Using a Sketched Semantic Map." International Journal of Advanced Robotic Systems 9, no. 4 (October 2012): 138. http://dx.doi.org/10.5772/52501.

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Stavitsky, Vladimir Vyacheslavovich. "A statistical model for the radiocarbon chronology of the Neolithic forest-steppe Volga region monuments." Samara Journal of Science 7, no. 4 (November 30, 2018): 204–10. http://dx.doi.org/10.17816/snv201874208.

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The paper deals with the chronology of the early Neolithic forest-steppe Zavolzhye monuments, which is based on radiocarbon definitions obtained from fragments of ceramics. Radiocarbon dates on Elshanskaya and Srednevolzhskaya culture monuments are collected in two tables. They are graphically represented by a probability interval for each date. For the conditional statistical unit the chronological interval of 125 years is accepted. On the basis of statistical data, the author has constructed graphs that reflect the frequency of dates occurrence for periods of 250 years. As for the Elshanskaya culture monuments the highest concentration of radiocarbon dates occurs on a chronological segment 5875-5250 cal BC (39% of all dates). Half of the dates are recorded on the segment 4750-4500 cal BC (21%). Only 12% of radiocarbon dates are in 6750-6250 cal BC, which belongs to the period of the Elshanskaya antiquities development. In our opinion, Elshanskaya culture could not exist unchanged for such a long time. Such a significant variation in time is apparently due to the imperfection of the dating method and the presence of reservoir effects of various kinds. Elshanskaya culture probably existed in 5875-5250 cal BC. At the final stage of Elshanskaya antiquities existence (5500-5250 cal BC) the monuments of Srednevolzhskaya culture started to develop.
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Feltes, Rolf, Ralf Peuker, and Florian Weber. "Complete Vehicle and Powertrain Acoustics of the New BMW 525D." ATZ worldwide eMagazine 114, no. 1 (January 2012): 4–9. http://dx.doi.org/10.1365/s38311-012-0130-z.

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Ito, Yoshihiro, Norio Sugimura, Oh Hyeong Kwon, and Yukio Imanishi. "Enzyme modification by polymers with solublities that change in response to photoirradiation in organic media." Nature Biotechnology 17, no. 1 (January 1999): 73–75. http://dx.doi.org/10.1038/5250.

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Зенкевич, Адам, and Adam Zygmunt Zienkiewicz. "Amicable Dispute Resolution: a comparison of the Polish and Russian legal perspective." Comparative Research In Law and Politics 2, no. 1 (June 15, 2014): 61–67. http://dx.doi.org/10.12737/5250.

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The article is devoted to Amicable Dispute Resolution (ADR). The essence of amicable means of dispute resolution and the basic forms of ADR (negotiation, mediation, arbitration) are considered. Author treats these forms as the first class justice. In his point of view mediation and the other basic forms of ADR are "the Complementary Forms of Justice". Then there is the detailed analysis focuses on the most important law acts concerning mediation in civil matters in Poland and the Russian Federation. The comparison presents the essential differences between the Polish and the Russian regulations. In conclusion, the five mainly motives of using ADR are noticed. The broader functions of ADR connected not only the classical regulatory, protective or harmonizing issues are shown.The article is devoted to Amicable Dispute Resolution (ADR). The essence of amicable means of dispute resolution and the basic forms of ADR (negotiation, mediation, arbitration) are considered. Author treats these forms as the first class justice. In his point of view mediation and the other basic forms of ADR are "the Complementary Forms of Justice". Then there is the detailed analysis focuses on the most important law acts concerning mediation in civil matters in Poland and the Russian Federation. The comparison presents the essential differences between the Polish and the Russian regulations. In conclusion, the five mainly motives of using ADR are noticed. The broader functions of ADR connected not only the classical regulatory, protective or harmonizing issues are shown.
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Belavý, Daniel L., Ulf Gast, Martin Daumer, Elena Fomina, Rainer Rawer, Hans Schießl, Stefan Schneider, Harald Schubert, Cristina Soaz, and Dieter Felsenberg. "Progressive Adaptation in Physical Activity and Neuromuscular Performance during 520d Confinement." PLoS ONE 8, no. 3 (March 28, 2013): e60090. http://dx.doi.org/10.1371/journal.pone.0060090.

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Dissertations / Theses on the topic "5250d"

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Johansson, Linus. "Konstruktion av Lastarstativ Lundberg 5250." Thesis, Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-86559.

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Wade, Matthew. "Investigating the origins of macroscopic variation in differential ethnic hair types." Thesis, Cardiff University, 2013. http://orca.cf.ac.uk/52502/.

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In the modern world hair plays a cultural and aesthetic role. The hair care industry accounts for a large portion of the cosmetic and dermatological industry generating large financial sums in sales, and consequently research and development into hair care products is important for companies seeking to increase their market share and profits. Currently there are very few products which specifically target certain ethnicities as the basis of knowledge underlying what nanoscopic and molecular factors cause the variation seen at the macroscale of human hair is circumscribed. Therefore a need exists within this industry to expand the information available on the origins of macroscopic variation in differential ethnic hair types. The work presented in this thesis is the embodiment of five different studies: a bulk X-ray scattering analysis of single hair fibres, a series of skin-core experiments utilising microfocus X-ray scattering, an attenuated total reflectance Fourier transform infrared spectroscopy study of the cuticle surface and a study of the lipids extracted from different spatial locations within hair fibres. The bulk X-ray scattering analysis on single hair fibres showed that the non-keratinous materials; namely the lipids and the amorphous/disordered material and interfaces present are responsible for the largest source of variation seen inter-ethnically at the nanoscopic and supramolecular levels. The lipids were found to be different amongst hair types with respect to their crystalline spacing, the total intensity and thus volume present and also in the preferential structural orientation of the lipid arrangement. The low angle diffuse scatter which is thought to be related to the keratin associated proteins varied with respect to the extent in q range, the angular behaviour and the behaviour of the diffuse scatter under hydration conditions. The azimuthal spread of the reflection arising from the inter-lateral packing of the keratin intermediate filaments was also found to differ between hair types. The skin-core experiments provide information on the textural variation of the hair fibre across the concentric subsections of hair enabling information to be sought on the structural components of the hair. The work presented shows that there are zonal differences in both the keratinous and non-keratinous structures present across the cross-section of the hair fibres both intra and inter-ethnically. The differences seen are in the size and location of specific hierarchical keratinous assembly structures and also in the ultra -structure of the hair fibre as whole. Attenuated total reflectance Fourier transform infrared spectroscopy is a bench top technique that is widely available to investigate the surface structure of materials. The study presented has shown differences related to the keratin conformational structure and the hydrophilic properties of the hair fibres. There are also variations seen in the products of the cysteine containing structures due to weathering which may be due to a difference in the geographical location of the source. Lipids that are present on either the surface of hair fibres or located within the hair fibre account for the largest non-proteinaceous component present in hair. An investigation characterising the lipids preferentially extracted from different spatial locations of the hair fibre has been performed. The work presented has revealed that there is significant variation both intra and inter-ethnically in the total lipid content present, the lipid classes and the fatty acid profiles. The variation in the fatty acid profiles may also possibly be related to the difference in signal seen in the X-ray diffraction study.
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Touchais, Emmanuelle. "Étude et développement d'une source de plasma micro-onde pour déposer des revetements par pulvérisation sur des grandes surfaces." Grenoble INPG, 1996. http://www.theses.fr/1996INPG0106.

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Les caracteristiques d'une nouvelle source de plasma pour le depot de revetements par pulverisation sur des grandes surfaces ont ete etudiees. Cette source utilise une onde electromagnetique de frequence 2. 45 ghz pour accelerer les electrons qui ionisent les atomes d'argon par impact electronique. Un champ magnetique permet de confiner les electrons pour d'une part optimiser le couplage avec l'onde en tout lieu ou il est egal a 875 gauss et d'autre part transporter le plasma vers une cible de pulverisation polarisee negativement. Une source produisant une nappe de plasma de section rectangulaire de 75 cm2 a ete realisee. La caracterisation du plasma a ete effectuee en termes de densite electronique par interforemetrie, de temperature electronique par mesure de sonde et de courant d'ions recueillis sur la cible en fonction des parametres puissance micro-onde, pression d'argon, champ magnetique. Les valeurs obtenues ont montre que ce plasma est dense, avec une independance entre les parametres de creation du plasma et ceux de la pulverisation. L'usure des cibles de pulverisation est uniforme et correspond a l'intersection entre les lignes de champ magnetique et la surface de la cible. L'etude des couches de chrome deposees par ce procede a montre que la diminution de la pression permet d'obtenir des couches de densite proche de celle du chrome massique, avec des vitesses de depot elevees, et des contraintes residuelles faibles. Sous pression reduite constante, l'incorporation de carbone dans les couches de chrome par pulverisation reactive a permis d'augmenter la durete de ces couches. La morphologie devient plus dense, avec des contraintes residuelles faibles et une resistivite electrique faible. D'autres revetements (fer, oxyde de chrome, oxyde d'aluminium) ont ete realises pour demontrer la potentialite de ce nouveau dispositif a deposer en tension de polarisation negative continue de la cible des materiaux magnetiques et des oxydes
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Alharbi, Mohammed Abdullah N. "Saudi Arabia and Communism during the Cold War : King Faisal's foreign policy towards the Soviet Union, 1962-1975." Thesis, Durham University, 2017. http://etheses.dur.ac.uk/5250/.

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This thesis examines "Saudi Arabian foreign policy towards Communism during the Cold War: King Faisal's foreign policy with the Soviet Union, 1962-1975." The goal of this project is to further our understanding of Saudi diplomacy towards Soviet communism during the Cold War. Drawing on a broad range of archival and published sources in Arabic and English, such as government papers, books and articles, this study investigates different attitudes and polices that shaped Saudi Arabian policy in containing Communism around its zenith in the Middle East in the 1960s and 1970s. Focusing on built strategies of fighting Communism; the policy process was also framed as a struggle against secular nationalism movements and hence Islamic diplomacy became a fundamental motivation for action. These were key features of Saudi policy during the Cold War and were utilised in an effort to mobilize domestic actors in Saudi Arabia. My thesis thus pays special attention to key characteristic of "encirclement syndrome" that enables a systematic assessment of this study. The thesis's main argument is that Saudi Arabia in the 1960s and 1970s fought Communism on all fronts as the results of wider political and religious factors, rather than the actions of an individual ruler or country.
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Serio, Ulises Daniel. "Energía solar." Bachelor's thesis, Universidad Nacional de Cuyo. Facultad de Ciencias Económicas, 2012. http://bdigital.uncu.edu.ar/5250.

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La energía solar posee un enorme potencial, por ejemplo, si un 10% del desierto de Sahara fuera instalado con paneles solares (suponiendo una efectividad de captación de radiación del 10%), produciría una cantidad de energía eléctrica equivalente al doble del consumo eléctrico mundial. De este modo no existe un problema de recursos o fuentes de energía, sino un problema de costos (actualmente, la energía solar es 10 veces más cara de producir que la provista por una central térmica tradicional) y las demás formas limpias de generar electricidad (hidroeléctrica, geotérmica, mareomotriz, eólica, etc.) no poseen la capacidad técnica de alimentar al planeta dado los recursos limitados de las mismas (Lackner y Sachs 2005). En Argentina el uso de este tipo de tecnología es todavía muy limitado. No obstante ha aumentado recientemente la popularidad del uso de la energía solar (y calefones solares) en la región de Cuyo haciendo verdaderamente importante un estudio sobre si esta tendencia es correcta y conviene a la sociedad o si sus recursos serían mejor invertidos en otras tecnologías o gastos (incluso dentro del ámbito energético). Un aspecto que resulta importante evaluar es la conveniencia de la implementación de estas tecnologías desde el punto de vista económico-privado ya que de esta manera se pueden direccionar acciones de políticas tendientes a incentivar el uso de las mismas.
Fil: Serio, Ulises Daniel. Universidad Nacional de Cuyo. Facultad de Ciencias Económicas.
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Bam, June Catherine. "The current relevance of populist history in schools : the attitudes of Cape Town youth to history." Thesis, Stellenbosch : Stellenbosch University, 2001. http://hdl.handle.net/10019.1/52503.

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Thesis (DPhil)--Stellenbosch University, 2001.
ENGLISH ABSTRACT: This thesis exanunes whether the historical consciousness of grade 10 youth would increase should there be an intervention facilitated for this purpose, that is that they would show a heightened consciousness of the relation between school history and current affairs, politics and other societal issues. This intervention comprises the My New World text produced within the populist historiographical tradition in South Africa. The notion of historical consciousness is defined as the complex relation between an interpretation of the past, a perspective of the present and expectations of the future ROsen (1989; 1994). The investigation comprised a theoretical and empirical component. The theoretical component is informed by the theories of epistemology, knowledge, schooling and curriculum. The empirical component is based on the Youth and History Survey conducted on historical consciousness amongst youth in Europe in the early 1990s. Both this study and the European study were conducted during periods of political transition. The chosen research methodology was that of triangulation, combining quantitative with qualitative methods. The quantitative component was based on the measurement used in the European study, and comprised an experimental pre-test and post-test research design, measuring "inside school" and "outside school" historical consciousness. The study was conducted in 8 grade 10 classrooms at 8 schools in Cape Town, representative of class, race, language and gender. The teachers acted as facilitators of the intervention. The conclusion reached in the research is that although the intervention resulted in an increased enthusiasm amongst individuals for school history and interest in political issues and an understanding for the present as in evidence from the qualitative data, this was not reflected in the quantitative data which showed no significant increase in the "inside school" nor "outside school" historical consciousness amongst youth of average 15 years in grade 10 history classrooms in Cape Town. It can therefore not be empirically concluded that when youth are exposed to populist history over a limited period that they would show an increased "outside school" or "inside school" historical consciousness even though an intervention might aim to increase such a consciousness. A significant finding is that the case for an already existent historical consciousness related to the variables of class and gender holds. Instead of increasing the levels of historical consciousness, the intervention resulted in a surfacing of long-held attitudes, perceptions and beliefs of people, society, the past, the present and the future. The intervention succeeded in bringing these complex layers of variables and related factors that impact on perceptions and attitudes to the surface. Given this complexity, it was also concluded that an empirical study of historical consciousness amongst youth through an intervention over a limited period of time is risky, if not of little value.
AFRIKAANSE OPSOMMING: Hierdie tesis ondersoek die vraag of die historiese bewussyn van graad 10-leerders sal toeneem indien daar vir hierdie doe I 'n intervensie sou plaasvind, met ander woorde of hulle 'n verhoogde bewussyn van die verhouding tussen die yak Geskiedenis op skool en sake van die dag, die politiek en ander gemeenskapsake sal aantoon. Die tersaaklike intervensie behels die teks van My New World wat daargestel is binne die raamwerk van die populistiese historiografiese tradisie in Suid-Afrika. Die begrip 'historiese bewussyn' kan omskryf word as 'n komplekse verhouding tussen die interpretasie van die verlede, 'n perspektief oor die hede, en verwagtinge oor die toekoms (Rusen 1989; 1994). Die ondersoek bevat 'n teoretiese sowel as 'n empiriese komponent. Die teoretiese komponent is gebaseer op epistemologiese, onderwys- en kurrikulumteoriee. Die empiriese komponent vind sy grondslag in die Youth and History Survey ondersoek oor historiese bewussyn wat in die vroee 1990' s onder Europese jongmense geloods is. Beide hierdie studie en die Europese navorsing is in tye van politieke oorgang onderneem. Die navorsingsmetode wat gebruik is, is die van triangulasie wat uit 'n kombinasie van kwantitatiewe en kwalitatiewe metodes bestaan. Die kwantitatiewe komponent lS gebaseer op die meting wat in die Europese studie gebruik is, en bestaan uit 'n eksperimentele voor- en natoets navorsingsontwerp wat die historiese bewussyn "binne" en "buite" skoolverband meet. Die studie is geloods in agt graad 10-klaskamers by agt skole in Kaapstad wat klas, ras, taal en geslag verteenwoordig het. Die betrokke onderwysers het as fasiliteerders vir die intervensie opgetree. Die gevolgtrekking waartoe in die ondersoek geraak is, is dat, alhoewel die intervensie tot verhoogde entoesiasme vir Geskiedenis as skoolvak en tot belangstelling in politieke kwessies en 'n begrip van die hede onder individuele leerders gelei het (soos afgelei kon word uit kwalitatiewe data), hierdie tendens nie weerspieel is deur die kwantitatiewe data nie: eersgenoemde het nie 'n beduidende verhoging in die historiese bewussyn "binne" of "buite" skoolverband onder leerders met 'n gemiddelde ouderdom van 15 jaar getoon nie. Daar kan dus nie empiries tot die gevolgtrekking geraak word dat wanneer leerders vir 'n beperkte tyd aan populistiese geskiedenis blootgestel word, hulle 'n verhoogde historiese bewussyn "binne" of "buite" skoolverband sal aantoon nie, selfs al sou so 'n intervensie dit weI ten doel he om so 'n bewussyn te verhoog. 'n Beduidende bevinding is dat daar 'n saak uitgemaak kan word vir 'n reeds bestaande historiese bewussyn wat in verband staan met die veranderlikes van klas en geslag. In plaas daarvan om die vlakke van historiese bewussyn te verhoog het die intervensie die gevolg gehad dat lank bestaande houdings, persepsies en oortuigings oor mense, die gemeenskap, die verlede, die he de en die toekoms, na die oppervlak beweeg het. Die intervensie het dus daarin geslaag om hierdie komplekse lae veranderlikes en verwante faktore wat persepsies en houdings beinvloed, na die oppervlak te bring. In die lig van die kompleksiteit hiervan, is daar ook tot die gevolgtrekking geraak dat 'n empiriese studie van historiese bewussyn onder jongmense oor 'n beperkte tyd deur middel van intervensie riskant is, indien nie van min waarde nie.
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Coosner, Carroll Diane. "The design and evaluation of a cognitive skills assessment checklist for educators." Thesis, Stellenbosch : Stellenbosch University, 2001. http://hdl.handle.net/10019.1/52505.

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Thesis (MEd)--University of Stellenbosch, 2001.
ENGLISH ABSTRACT: Post-apartheid South Africa has seen a shift to process-centred, outcomesbased (OBE) education. Within this paradigm much has been written and recommended as regards assessment, specifically authentic assessment, which needs to be continuous. Within this transformatory model of teaching and assessment, it is vital for the educator to understand how the learner learns in order to assess him/her authentically. Because cognition has to do with how learners acquire, store and utilize information, the best way to assess cognitive ability is to assess those thought processes that are involved in arriving at the products of cognition directly. Being process-based and judging the learners' responsiveness to instruction, it becomes important for the educator to examine how a learner learns, before educators can hope to categorise and analyse the learners' ability to learn. The paucity of the data base search revealed that the design of such a cognitive checklist was imperative. The checklist had to be easily understood, practical and easily impiementabie. The researcher based the checklist on Feuerstein's (1980) model, which is underpinned by the concepts of structural cognitive modifiability (SCM) and the mediated learning experience (MLE). SCM is based on the assumption that human beings have the capacity to modify their cognitive functions and adapt to life's changing demands. They are thus open systems which are amenable to cognitive changes. Structural changes are pervasive and determine cognitive function in a broad series of mental activities. Feuerstein has suggested a list of deficient cognitive functions at the input, elaboration and output phases of the mental act. These serve as guidelines for observational and mediational efforts. The identification of the deficient cognitive function, the level of modifiability and the mediation required to change them are considered to be of vital importance to predicting future learning. This basic assumption shifts the responsibility for a person's modifiability from that individual to the mediator or educator. The basic parameters of the cognitive process are subsumed into the cognitive map. These include: content; operation; modality; phase (input, elaboration, output); level of complexity; level of abstraction and level of efficiency. The present researcher reframed all the basic components of the learning phases into easily accessible English and provided examples of sub-skills (150) necessary for the successful acquisition of learning at that phase of the learning process. The literature study was followed by a pilot-study. This was carried out in order to refine the checklist and make sure that it was, indeed, user-friendly, easily understood, impiementabie without training and that it yielded information which the educators found to be professionally beneficial and enriching. The results of the pilot-study were incorporated into The Checklist To Assess Cognitive Skills' (Chapter 4). The result of the research was unanimous as regards the above-mentioned goals. The educators all realised the necessity of linking assessment to instruction and understood how crucial it is that educators understand and appreciate how a learner learns and hence, develops.
AFRIKAANSE OPSOMMING: Na apartheid het Suid-Afrika 'n verskuiwing na prosesgesentreerde, uitkomsgebaseerde onderwys (UGO) beleef. Binne hierdie paradigma is baie geskryf en aanbevelings gemaak oor assessering, veraloor outentieke assessering wat deurlopend toegepas moet word. Binne hierdie transformatiewe model van onderrig en assessering is dit van besondere belang dat opvoedkundiges moet verstaan hoe die leerder leer ten einde hom of haar op 'n outentieke wyse te kan assesseer. Omdat kognisie te doen het met die verwerwing, prosessering, storing en aanwending van inligting, is die geskikste wyse om kognitiewe verweë te assesseer, om daardie denkprosesse te assesseer wat direk betrek word ten einde by die produkte van kognisie uit te kom. Aangesien dit proses gebaseerd is, en gaan om die beoordeling van leerders se responsiwiteit op onderrig, word dit belangrik vir die opvoedkundige om te ondersoek hoe 'n leerder leer, voordat die opvoedkundige met enige mate van sukses leerders se leervermoëns sal kan kategoriseer en analiseer. Die beperkte omvang van die databasis-soektog beklemtoon dat die ontwerp van 'n kognitiewe kontrolelys vir opvoedkundiges imperatief is. Die kontrole lys moet verstaanbaar, prakties en maklik implementeerbaar wees. Die navorser het die kontrolelys gebaseer op Feuerstein (1980) se model wat onderlê word deur die konsepte van strukturele kognitiewe modifieerbaarheid (SCM) en die gemedieerde leerervaring (MLE). Struktuele kognitiewe modifieerbaarheid (SCM) is baseer op die aanname dat mense oor die vermoë besit om hulle eie kognitiewe funksies te modifieer en om aan te pas by die veranderende eise van die lewe. Hulle is dus oopsisteme wat vatbaar vir kognitiewe veranderinge is. Struktuele veranderinge is deurdringend van aard en bepaal kognitiewe funksionering in 'n breë reeks van denkaktiwiteite. Feuerstein het 'n lys van ontoereikende kognitiewe funksies by die invoer-, uitbreidings- en uitvoerfases van die denkhandeling voorsien. Hierdie lys dien as riglyne by beide waargenome en gemedieerde pogings. Die identifikasie van ontoereikende kognitiewe funksies, die vlak van modifieerbaarheid en die mediëring om dit te wysig, word as van kardinale belang beskou in toekomstige leer. Die basiese parameters van die kognitiewe proses word gesubsumeer in die kognitiewe kaart. Dit sluit in: inhoud; operasie; modaliteit; fase (invoer, uitbreiding, uitvoer); vlak van kompleksiteit; vlak van abstraksie en vlak van effektiwiteit. Die navorser het al die basiese komponente van die leerfases in toeganklike Engels herskrywe en het voorbeelde van 150 subvaardighede, nodig vir suksesvolle verwerwing van leer in daardie spesifieke fase van die leerproses, voorsien. Die literatuuroorsig is deur 'n loodsstudie opgevolg. Die loodsstudie is uitgevoer ten einde die kontrolelys te verfyn en om te vergewis dat dit werklik gebruikersvriendelik, maklik verstaanbaar, en toepasbaar is sonder opleiding, en dat dit inligting voorsien wat 'n voordelige en verrykende professionele bydrae sal maak. Die bevindings van die loodsstudie is in die Kognitiewe Kontrolelys geïnkorporeer (Hoofstuk 4). Die navorsingsbevindings het op eenstemmige wyse die realisering van bostaande doelwitte onderskryf. Die opvoedkundiges het almal die noodsaaklikheid van die verbinding tussen assessering en onderrig verstaan en ook van die belangrikheid dat die opvoedkundige begrip en waardering toon van hoe 'n leerder leer en dus ontwikkel.
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Magano, Abram Tshwaro. "The design of a communication protocol for a distributed ADCS for SUNSAT 2." Thesis, Stellenbosch : Stellenbosch University, 2001. http://hdl.handle.net/10019.1/52506.

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Thesis (MScEng)--University of Stellenbosch, 2001.
ENGLISH ABSTRACT: One of the main subsystems of SUNSAT is the Attitude Determination and Control System (ADCS), responsible for the orientation and positioning of the satellite. Due to the integrated architecture of the system, several shortcomings were identified. A possible solution to the problems is the implementation of a distributed system. The design of a communication protocol for a distributed system is the focus of this thesis. An investigation on different network topologies and communication protocols as well as error control techniques is carried out to establish a combination that meets the requirements of the ADCS. Based on defined protocol specifications a detailed protocol design is proposed. Then the protocol is implemented using a layered software structure that emanates from the OSI layering model, to provide well defined software structures and interfaces. A series of measurements have shown that the protocol meets the functional requirements of the ADCS and further provides reliable data transfer on the network.
AFRIKAANSE OPSOMMING: Een van die vernaamste dele van SUNSAT is die "Attitude Determination and Control System" (ADCS) wat verantwoordelik is vir die orientasie en posisionering van die satelliet. Verskeie tekortkomminge as gevolg van die geYntegreerde argitektuurvan die stelsel, is geYdentifiseer. 'n Moontlike oplossing vir die probleme is die implementering van 'n verspreide stelsel. Die ontwerp van 'n kommunikasie protokol vir 'n verspreide stelsel is die fokus van die tesis. 'n Ondersoek na verskeie netwerk topoloqie en kommukasie protokolle, asook foutbeheer tegnieke is uitgevoer om vas te stel watter kombinasie die ADCS se vereistes sal bevredig. 'n Gedetaileerde protokol ontwerp is voorgestel gebaseer op gedefineerde protokol spesifikasies. Hierdie protokol is toe geYmplementeer deur gebruik te maak van vlak gestruktureerde sagteware wat afkomstig is van die OSI model, met die oog op goed gedefineerde sagteware strukture en koppelvlakke. 'n Reeks meetings het aangedui dat die protokol die funksionele vereistes van die ADCS bevredig en dat dit verder betroubare data verplasing oor die netwerk verskaf.
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Conradie, P. A. (Petrus Alwyn). "The development of a dynamic engine-testing facility." Thesis, Stellenbosch : Stellenbosch University, 2001. http://hdl.handle.net/10019.1/52509.

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Thesis (MScEng.)--University of Stellenbosch, 2001.
ENGLISH ABSTRACT: The last two decades have seen many changes within the automotive industry. Many advances have been made in the design, research and development of the internal combustion engine and technological progress made in the integrated-circuit and computer industry has resulted in the availability of reliable low-cost electronic components. These components have, over time, been incorporated into the very hearts of engines, thereby allowing for the accurate control of engine functions and processes to an extent that was previously impossible. Parallel to these developments is the growing concern for the environment and the realisation that resources are being consumed at ever-increasing rates. This has placed vehicle manufacturers under continual pressure to optimise their engines, not only for fuel efficiency, but also to reduce harmful emissions while continuing to deliver better performance and drivability characteristics. At the same time, engine testing equipment and facilities have had to keep abreast with these advances and this has required the development of more sophisticated testing facilities. One such facility is the dynamic engine test-bed. Among other features, this facility has the ability to subject test-bed mounted engines to loads similar to what would be experienced in a vehicle on the road. This approach allows for the optimisation of engine components and performance under more realistic conditions, yielding results far superior to those obtainable using more conventional steady-state testing and development procedures. This document discusses the development of such a dynamic engine test-bed at the Centre for Automotive Engineering at the University of Stellenbosch. The project was initiated by conducting a literature survey to establish the current state of technology in the field. The dynamic test-bed was developed around an existing direct-current electric motor and industrial speed controller configured in a regenerative manner. This setup enabled the unit to both absorb and deliver power, essential for the simulation of vehicle dynamics. Great care was taken to ensure that signals obtained from the test-bed were accurate and useful for further computer manipulation. Anti-aliasing filters were designed and manufactured to guarantee that signals could not be misinterpreted due to sampling effects. A computer-implemented vehicle model was developed to simulate, in real-time, vehicle response to torque developed by the engine on the test stand. The model included a manual transmission, clutch and a rigid drive-shaft. Driver input (accelerator, brake, clutch and gear selection) was by means of a set of pedals and hand-held gear selector switches. Various vehicle speed control strategies were investigated and recommendations made regarding their possible future implementation. System evaluation was accomplished by the simulated acceleration of a large truck. The simulations indicated that repeatable results could be obtained from the system. The system was also found to be adequately sensitive to reflect the effect of subtle changes made to engine parameters on vehicle acceleration. It was concluded that the dynamic engine test-bed did indeed offer the capability to conduct research and testing not previously available in South Africa. Finally, recommendations were made for the future improvement and expansion of the system's performance and capabilities.
AFRIKAANSE OPSOMMING: Die laaste twee dekades het baie veranderinge in die outomobiel industrie megebring. Groot vooruitgang is gemaak in die ontwerp, navorsing en ontwikkeling van die binnebrand enjin, terwyl tegnologiese vooruitgang in die geïntegreerde-stroombaan en rekenaar industrië betroubare elektroniese komponente teen lae koste beskikbaar gemaak het. Hierdie komponente is mettertyd in enjins geïnkorporeer en het die akkurate beheer van enjin funksies en prosesse moontlik gemaak. Saam met hierdie ontwikkeling, is daar toenemende kommer oor die omgewing en 'n bewuswording dat hulpbronne verbruik word teen 'n groeinde tempo. Hierdie feite plaas voertuig vervaardigers onder volgehoude druk om enjins te optimeer vir brandstof doeltreffendheid, maar ook om skadelike emissies te bekamp terwyl beter werksverrigting en bestuurbaarheid vereis word. Enjin toetstoerusting en fasiliteite moes terselfdetyd met hierdie vooruitgang byhou en het die ontwikkeling van meer gesofistikeerde toetsfasiliteite vereis. Een sodanige fasiliteit is die dinamiese enjin toetsbank. Een van die kenmerke van hierdie fasiliteit is dat dit toetsbank-gemonteerde enjins kan onderwerp aan 'n las soortgelyk as wat ondervind sou word in 'n voertuig op die pad. Hierdie benadering stel ingenieurs in staat om enjin komponente en werksverrigting te optimeer onder meer realistiese kondisies en lewer resultate van 'n baie hoër gehalte as wat verkry kan word deur gebruik te maak van meer konvensionele gestadigde-toestand toets- en ontwikkelings-prosedures. Hierdie dokument bespreek die ontwikkeling van so 'n dinamiese enjin toetsbank by die Sentrum vir Automobielingenieurswese aan die Universiteit van Stellenbosch. Die projek is geïnisieer deur 'n literatuurstudie te doen om die huidige stand van tegnologie in die gebied vas te stel. Die dinamiese enjintoetsbank is ontwikkel rondom 'n bestaande gelykstroom-motor en industriële spoed beheerder wat in 'n regeneratiewe konfigurasie opgestel is. Hierdie opstelling het die absorpsie en lewering van drywing moontlik gemaak, 'n vereiste vir die simulasie van voertuig dinamika. Baie tyd is gespandeer om te verseker dat seine afkomstig van die toetsbank akkuraat en bruikbaar was vir verdere rekenaar manipulasie. Anti-aliaseringsfilters is ontwerp en vervaardig om te verseker dat seine nie verkeerd geïnterpreteer kon word as gevolg van diskritiserings effekte nie. 'n Rekenaar ge-implementeerde voertuigmodel is ontwikkel om 'n voertuig se reaksie op draairnoment ontwikkel deur die enjin op die toetsbank intyds te simuleer. Die model het 'n handrat transmissie, koppelaar en starre dryf-as ingesluit. Bestuurder intree (vernellingspedaal, rem, koppelaar en rat seleksie) is bewerkstellig deur middel van 'n stel pedale en 'n hand geoperateurde rat skakelaar. Verskeie voertuig spoed-beheerders is ondersoek en aanbevelings is gemaak aangaande die toekomstige implementering daarvan. Die sisteem is geëvalueer deur die versnellingsimulasie van 'n groot vragmotor. Die simulasies het daarop gedui dat herhaalbare resultate van die sisteem verkry kon word. Daar is ook bevind dat die sisteem sensitief genoeg was om subtiele veranderinge aan enjinparameters in die resultate te weerspieël. Die gevolgtrekking is gemaak dat die dinamiese enjin toetsbank inderdaad die vermoëns gebied het om ontwikkeling en toetswerk te doen wat nie voorheen in Suid-Afrika moontlik was nie. Voorstelle is laastens gemaak aangaande die toekomstige verbetering en uitbreiding van die sisteem se vermoëns.
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Spies, Dorothea Janetta. "The coping mechanisms of low-income women : a grounded theory analysis of subjective descriptions of coping." Thesis, Stellenbosch : Stellenbosch University, 2001. http://hdl.handle.net/10019.1/52501.

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Thesis (MA)--University of Stellenbosch, 2001.
ENGLISH ABSTRACT: The primary goal of this cross-cultural study was to determine how low-income female farm workers in the Western Cape of South Africa, describe their own coping mechanisms. Eight participants were asked to respond to an open-ended question on how they cope with life's difficulties. The current study formed part of a larger project entitled: "Forgotten women on farms". The psychological distress and resilience of female farm workers of colour in the Western Cape: exploring the possibilities for mental health support (Kruger, 1998). The coping interviews were analyzed by means of grounded theory. Analysis revealed that 28 coping mechanisms were identified by the participants themselves. A distinction was made between problem-focused coping mechanisms and emotion-focused coping mechanisms. Out of the 28 identified mechanisms, 8 were categorized as problem-focused coping mechanisms, while 20 were categorized as emotion-focused coping mechanisms, suggesting that the participants predominantly employ emotion-focused coping mechanisms. It was also found that the emotion-focused coping mechanisms employed by the participants often involved an avoidance of emotion. The findings were discussed by: (i) Critically discussing the way in which emotion-focused coping is traditionally defined within the coping literature. (ii) Comparing this to the conceptualization of the role of emotion by authors of trauma literature. Possible reasons for the prevalent use of emotion-focused coping mechanisms in this particular population were provided. The implications of these findings for assessment of coping strategies and for mental health care in this population were discussed.
AFRIKAANSE OPSOMMING: Ole hoofdoeisteiling van hierdie kruis-kulturele studie was om vas te stel hoe laeinkomste vroueplaaswerkers in die Wes-Kaap van Suid-Afrika hulle eie streshanteringsmeganismes beskryf. Agt deelnemers is gevra om op "n oop vraag oor hoe hulle lewensmoeilikhede hanteer, te reageer. Hierdie studie vorm deel van "n groter projek getiteld "Forgotten women on farms". The psychological distress and resilience of female farm workers of colour in the Western Cape: exploring the possibilities for mental health support (Kruger, 1998). Hierdie onderhoude oor streshantering is ontleed m.b.v. "grounded theory". Analise het getoon dat 28 hanteringsmeganismes deur die deelnemers self ge"ldentifiseer is. Onderskeid is gemaak tussen probleem-gerigte hanteringsmeganismes en emosioneel-gerigte hanteringsmeganismes. Uit die 28 gerdentifiseerde meganismes, is 8 gekategoriseer as probleem-gerigte hanteringsmeganismes, terwyl 20 gekategoriseer is as emosioneel-gerigte hanteringsmeganismes, duidend daarop dat deelnemers grootliks van emosioneel-gerigte hanteringsmeganismes gebruik maak. Daar is ook gevind dat die emosioneel-gerigte hanteringmeganismes dikwels "n vermyding van emosie behels het. Hierdie bevindinge is bespreek deur: (i) Die manier waarop emosioneel-gerigte hanteringsmeganismes tradisioneel in die literatuur gedefinieer word krities te bespreek. (ii) "n Vergelyking te tref met die wyse waarop die rol van emosie deur die outeurs van trauma literatuur gekonseptualiseer word. Moontlike redes vir die groter gebruik van emosioneel-gerigte hanteringsmeganismes in hierdie spesifieke populasie is voorsien. Die implikasies van hierdie bevindinge vir die meting van hanteringsmeganismes en vir geestesgesondheidsdienste binne hierdie populasie is bespreek.
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Books on the topic "5250d"

1

Krupchitsky, Pyotr A. Fundamental Research with Polarized Slow Neutrons. Berlin, Heidelberg: Springer Berlin Heidelberg, 1987. http://dx.doi.org/10.1007/978-3-642-52501-8.

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Ammann, Daniel. Ion-Selective Microelectrodes. Berlin, Heidelberg: Springer Berlin Heidelberg, 1986. http://dx.doi.org/10.1007/978-3-642-52507-0.

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Someya, Tsuneo, ed. Journal-Bearing Databook. Berlin, Heidelberg: Springer Berlin Heidelberg, 1989. http://dx.doi.org/10.1007/978-3-642-52509-4.

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Tilley, Nick, Graham Farrell, and Ronald V. Clarke. Target Suitability and the Crime Drop. London: Palgrave Macmillan UK, 2015. http://dx.doi.org/10.1007/978-1-137-52502-4.

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Mazierska, Ewa, ed. Heading North. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-52500-6.

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Basu, Anupam, Sukhendu Das, Patrick Horain, and Samit Bhattacharya, eds. Intelligent Human Computer Interaction. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-52503-7.

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Saville, Julia F. Victorian Soul-Talk. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-52506-8.

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Thompson, Helen. Oil and the Western Economic Crisis. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-52509-9.

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Gonzalez, Wenceslao J., ed. Methodological Prospects for Scientific Research. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-52500-2.

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Home, Robert, ed. Land Issues for Urban Governance in Sub-Saharan Africa. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-52504-0.

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Book chapters on the topic "5250d"

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Gonzalez, Wenceslao J. "Pragmatism and Pluralism as Methodological Alternatives to Monism, Reductionism and Universalism." In Synthese Library, 1–18. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-52500-2_1.

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Bhatasara, Sandra. "Women, Land and Urban Governance in Colonial and Post-colonial Zimbabwe." In Land Issues for Urban Governance in Sub-Saharan Africa, 207–24. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-52504-0_13.

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Krupchitsky, Pyotr A. "Brief Summary of Experimental Techniques Required for Working with Polarized Slow Neutrons." In Fundamental Research with Polarized Slow Neutrons, 1–22. Berlin, Heidelberg: Springer Berlin Heidelberg, 1987. http://dx.doi.org/10.1007/978-3-642-52501-8_1.

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Krupchitsky, Pyotr A. "Anisotropy of Alpha Particles and Other Light Nuclei Emitted After Polarized Neutron Capture." In Fundamental Research with Polarized Slow Neutrons, 98–105. Berlin, Heidelberg: Springer Berlin Heidelberg, 1987. http://dx.doi.org/10.1007/978-3-642-52501-8_10.

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Krupchitsky, Pyotr A. "Anisotropy of the Angular Distribution of Fragments After Fission of Heavy Nuclei by Polarized Neutrons." In Fundamental Research with Polarized Slow Neutrons, 106–16. Berlin, Heidelberg: Springer Berlin Heidelberg, 1987. http://dx.doi.org/10.1007/978-3-642-52501-8_11.

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Krupchitsky, Pyotr A. "Spatial Parity Violation Effects in Neutron Optics." In Fundamental Research with Polarized Slow Neutrons, 117–28. Berlin, Heidelberg: Springer Berlin Heidelberg, 1987. http://dx.doi.org/10.1007/978-3-642-52501-8_12.

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Krupchitsky, Pyotr A. "Precession of Magnetic Moments of Polarized Neutrons in a Magnetic Field." In Fundamental Research with Polarized Slow Neutrons, 23–36. Berlin, Heidelberg: Springer Berlin Heidelberg, 1987. http://dx.doi.org/10.1007/978-3-642-52501-8_2.

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Krupchitsky, Pyotr A. "Interaction of Polarized Neutrons with Polarized Nuclei." In Fundamental Research with Polarized Slow Neutrons, 37–43. Berlin, Heidelberg: Springer Berlin Heidelberg, 1987. http://dx.doi.org/10.1007/978-3-642-52501-8_3.

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Krupchitsky, Pyotr A. "Anisotropy of Gamma Rays Emitted by Polarized Nuclei After Polarized Neutron Capture." In Fundamental Research with Polarized Slow Neutrons, 44–49. Berlin, Heidelberg: Springer Berlin Heidelberg, 1987. http://dx.doi.org/10.1007/978-3-642-52501-8_4.

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Krupchitsky, Pyotr A. "Circular Polarization of Gamma Rays Emitted by Nuclei After Polarized Neutrons Capture." In Fundamental Research with Polarized Slow Neutrons, 50–54. Berlin, Heidelberg: Springer Berlin Heidelberg, 1987. http://dx.doi.org/10.1007/978-3-642-52501-8_5.

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Conference papers on the topic "5250d"

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Chung, Daniel. "Three-Dimensional Velocity Field Measurements in Rugged Terrain Using Magnetic Resonance Velocimetry." In ASME 2019 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/imece2019-11729.

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Abstract Magnetic resonance imaging techniques were used to collect three-dimensional velocity data measurements of scaled models of a canyon in New Mexico to compare to simulations where a gas was released inside the canyon. The first canyon model covers an area of 1850m × 1030m with a scale of 1:5250 while the second model covers an area of 290m × 160m with a scale of 1:825. A fully turbulent flow with a Reynolds number of 36,000 using the channel hydraulic diameter passes through the canyon geometry for both models. With Magnetic Resonance Velocimetry (MRV), more than 13 million data points were measured to represent flow velocity. The MRV experiment with the 1:5250 scale model helped to identify key terrain features to be included in the next set of measurements of a higher resolution model. MRV not only served as a method of analysis but also as a method for design. The analysis of the data resulted in a new design of a 1:825 scale, which had a higher resolution of the terrain surrounding the gas release point. The preliminary scans from the 1:825 scale model showed a much more dynamic flow around the release point than observed in the 1:5250 scale model. Counter-rotating vortices and circulation can be observed in the 1:825 scale model. This data set will be used to compare to Sandia National Laboratories’ simulations of turbulent flows in a complex terrain.
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Chuang, Shui-Nan. "Probabilistic Analysis for the Mechanical Properties of Cross-Ply Fiber-Reinforced Composite Laminate." In ASME 2006 International Mechanical Engineering Congress and Exposition. ASMEDC, 2006. http://dx.doi.org/10.1115/imece2006-13060.

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A probabilistic micromechanics model had been developed for the unidirectional fiber-reinforced composite material design screening. In which, we used the predicted mechanical properties of IM-7 carbon fiber from the existing IM-7/5250-4 composite material system together with the observed 977-3 matrix mechanical properties to predict the probability density functions for the mechanical properties of IM-7/977-3 unidirectional composite. To include the material design in the structural design process, we had extended the probabilistic analysis to predict the probability density functions for the off-axis mechanical properties. The angle-ply and cross-ply laminates have been used extensively in aerospace structural designs. It is logical to extend the probabilistic analysis to predict the probability density functions for the mechanical properties of the laminated composite. We had provided the probabilistic analysis for a symmetric regular angle-ply laminate of IM-7/5250-4 composite laminate. In this report, we will focus on the probabilistic analysis of symmetric and anti-symmetric regular cross-ply laminates of IM-7/5250-4 fiber-reinforced composite with odd-number plies parallel to and even-number plies perpendicular to the laminate principal axes. These probabilistic micromechanics models provide a design-screening tool to help material producers to eliminate the unnecessary time-consuming and costly material fabrications and to reduce the numbers of testing to a minimum but enough to verify the model prediction. They also provide a structural analysis tool to help the structural designer to manage the structural and material uncertainties during the structural design process. And consequently, it provides a means to accelerate the insertion of materials into AF productions.
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Liu, Rong, and Wenzhong Zhou. "Fully Coupled Multiphysics Simulation of Enhanced Thermal Conductivity UO2-BeO Fuel Behavior." In ASME 2015 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/imece2015-52504.

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Commercial light water reactor fuel UO2 has a low thermal conductivity that leads to the development of a large temperature gradient across the fuel pellet, limiting the reactor operational performance due to the effects that include thermal stresses causing pellet cladding interaction and the release of fission product gases. This study presents the development of a modeling and simulation for enhanced thermal conductivity UO2-BeO fuel behavior in a light water reactor, using self-defined multiple physics models fully coupled based on the framework of COMSOL Multiphysics. Almost all the related physical models are considered, including heat generation and conduction, species diffusion, thermomechanics (thermal expansion, elastic strain, densification, and fission product swelling strain), grain growth, fission gas production and release, gap heat transfer, mechanical contact, gap/plenum pressure with plenum volume, cladding thermal and irradiation creep and oxidation. All the phenomenal models and materials properties are implemented into COMSOL Multiphysics finite-element platform with a 2D axisymmetric geometry of a fuel pellet and cladding. UO2-BeO high thermal conductivity nuclear fuel would decrease fuel temperatures and facilitate a reduction in pellet cladding interaction from our simulation results through lessening thermal stresses that result in fuel cracking, relocation, and swelling, so that the safety of the reactor would be improved.
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Guo, Wei, Weimin Cui, Tianxiang Yu, and Bifeng Song. "The Reliability and Sensibility Analysis for an Aircraft Lock Mechanism Based on the Surrogate Models." In ASME 2015 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/imece2015-52505.

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In order to analyze the reliability of the new lock mechanism which is an important part of aircraft cabin door system, this paper studies the reliability and sensitivity for the lock mechanism based on surrogate models and variance methods respectively. Function hazard analysis (FHA) and failure mode effects analysis (FMEA) of lock mechanism is studied firstly. Then, based on dynamics simulation model, performance function and various random variables, the widely used surrogate models of lock mechanism is established and verified. Based on the most accurate metamodel which has been established, the unlocking reliability which is the most hazardous function is calculated. Finally, the variance-based sensitivity method is used for sensitivity analysis of influence factors, the result shows that the tension of lock-hook from lock-ring is the largest influence factor on the unlocking reliability, which could contribute to the analysis and further improvement of lock mechanism.
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Tang, Y. J., Z. Yang, X. J. Wang, and J. Wang. "Research on the Piezoelectric Ultrasonic Actuator Applied to SFSS." In ASME 2015 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/imece2015-52506.

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This paper presents an investigation of a novel linear-type piezoelectric ultrasonic actuator for application in a Smart Fuze Safety System (SFSS). Based on the requirements of SFSS, the structural parameters of the proposed piezoelectric ultrasonic actuator are determined by fuze arming mode. Moreover, sensitivity analysis of the structural parameters to the frequency consistency is conducted using FEM software, after which the optimal dimensions are obtained with two close natural vibration frequencies. To validate the results of FEM, the frequency sweep tests of the piezoelectric ultrasonic actuator are performed to determine the motor’s actual working mode frequencies with PSV-300-B Doppler laser vibrometer system. Furthermore, the results of frequency sweep test are compared with that of the finite element analysis, and further verified by impedance analyzer. To investigate the overall performance of the piezoelectric ultrasonic actuator, vibration modes of actuator’s stator, output speed and force of the piezoelectric ultrasonic actuator are tested. The experimental results show that the output speed and force of the actuator can reach 88.2 mm/s and 2.3N respectively, which means that piezoelectric ultrasonic actuator designed in this paper can meet the demands of the SFSS.
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Key, J. W., F. E. Schumaker, E. J. Theisinger, B. L. Thompson, and E. H. Turner. "Design And Analysis Of turret Mooring Systems For Tanker-Based Storage Or Production Facilities." In Offshore Technology Conference. Offshore Technology Conference, 1986. http://dx.doi.org/10.4043/5250-ms.

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Daniels, Christopher, Nicholas Garafolo, Marta Bastrzyk, and Ian Smith. "Evaluation of a Novel Seal for Space Applications." In 45th AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit. Reston, Virigina: American Institute of Aeronautics and Astronautics, 2009. http://dx.doi.org/10.2514/6.2009-5250.

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Liu, Wei, Haiyang Zhao, Yufei Xie, and Hanxin Zhang. "High-Order WNND Scheme and Its Application in Topological Structure Analysis of Hypersonic Flow Around Liftbody." In 17th AIAA Computational Fluid Dynamics Conference. Reston, Virigina: American Institute of Aeronautics and Astronautics, 2005. http://dx.doi.org/10.2514/6.2005-5250.

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Vetrisano, Massimo, João Branco, Joan Pau Sanchez Cuartielles, Daniel Garci Yarnoz, and Massimiliano L. Vasile. "Deflecting Small Asteroids using Laser Ablation: Deep Space Navigation and Asteroid Orbit Control for LightTouch2Mission." In AIAA Guidance, Navigation, and Control (GNC) Conference. Reston, Virginia: American Institute of Aeronautics and Astronautics, 2013. http://dx.doi.org/10.2514/6.2013-5250.

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Xia, Guoping, Randy Smith, William Anderson, and Charles Merkle. "Computational Simulations of the Effect of Chamber Diameter on Single-Element Rocket Combustor Instability." In 44th AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit. Reston, Virigina: American Institute of Aeronautics and Astronautics, 2008. http://dx.doi.org/10.2514/6.2008-5250.

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Reports on the topic "5250d"

1

Murphy, T., P. Rieth, and J. Stevens. 5250 Telnet Enhancements. RFC Editor, July 2000. http://dx.doi.org/10.17487/rfc2877.

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Chmielewski, P. 5250 Telnet interface. RFC Editor, February 1991. http://dx.doi.org/10.17487/rfc1205.

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Ternan, M. Progress report no. 3 - an investigation of catalysts having bimodal pore size distributions for hydrocracking +5250c Athabasca bitumen. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1990. http://dx.doi.org/10.4095/304462.

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