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Christensen, Justin. "Electron Yield Measurements of High-Yield, Low-Conductivity Dielectric Materials." DigitalCommons@USU, 2017. https://digitalcommons.usu.edu/etd/6694.
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Materials exposed to the space plasma environment acquire electric charge, which can have harmful effects if it leads to arcing or electrostatic breakdown of important spacecraft components. In fact, spacecraft charging is the leading environmentally induced cause of spacecraft anomalies. This study focuses on measuring electron yield, a property of materials that describes how many electrons are ejected from a material under energetic electron bombardment, which can vary depending on the energy of incident electrons. Intrinsic electron yield is defined as the average number of electrons emitted per incident electron from an electrically neutral material. The specific aim of this work is to improve yield measurements for insulator materials, which can be difficult to test using conventional methods due to charge accumulation in insulators.Most studies of electron yield use a steady current electron beam in a vacuum chamber to irradiate materials to be tested. By comparing the amount of current deposited in the material to the total incident current, the emitted current can be calculated. This works well for conductors; however, insulators charge up quickly, which either repel incident electrons or reattract emitted electrons producing erroneous yield measurements. This study improves on methods that use a pulsed electron beam to measure yield with small amounts of charge per pulse, as well as neutralization methods to dissipate stored charge between pulse measurements.The improvements to instrumentation and data analysis techniques are quantified to demonstrate their validity. These improvements will allow for continued studies on extreme insulator materials. Future studies will provide new understanding of interactions between electron radiation and materials, which will allow for better modeling of spacecraft charging and the development of materials that meet desired electron emission specifications.
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Hartzheim, Paul N. H. "Canada's nascent high-yield market." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape3/PQDD_0016/MQ49568.pdf.
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Marakbi, Zakaria, and VYDRIN CARLOS JUNIOR LOPEZ. "High Yield Corporate Bond Portfolio Optimization." Thesis, KTH, Optimeringslära och systemteori, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-146746.
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The fixed maturity, cash flow and risk characteristics of high-yield corporate bonds distinguish them from equities and complicate a direct application of well established optimization techniques such as Markowitz's mean-variance model and Sharpe ratio maximization. This can partly explain why qualitative methods constitute the dominant design in the portfolio selection process of high-yield corporate bonds. This thesis attempts to employ elements from Markowitz's theories and combine them with optimization- as well as financial theory in order to develop a quantitative optimization model. In addition, we examine the possibilities for a shift in the existing dominant design. A risk-neutral pricing model were used to estimate default probabilities of high yield corporate bonds. To approximate the covariance matrix, a new application of the single-index method were proposed. The derived optimization models produced results that coincide with financial theory regarding risk, return and diversification. Furthermore, an examination of a potential shift in the current dominant design suggests that a shift is not likely to occur in the near future. A reoccurring remark in this thesis is the importance to understand the underlying assumptions behind any quantitative model, suggesting that quantitative models can merely be used as a tool in combination with a human judgement.Högavkastande företagsobligationer innehar egenskaper som särskiljer de från aktier. Detta medför komplikationer vid en direkt tillämpning av väletablerade optimeringsmodeller som 'Markowitz's mean-variance model' och 'Sharpe ratio maximisation'. Detta förklarar delvis varför kvalitativa metoder dominerar portföljallokeringsprocessen för högavkastande företagsobligationer. Examensarbetet kombinerar Markowitzs modell med teorier från optimeringslära och finansiell matematik i syfte att utveckla en kvantitativ optimeringsmodell för portföljallokering. Arbetet ämnar även till att undersöka möjligheterna för ett skift i den nuvarande dominanta processen för allokering av högavkastande företagsobligationer. En riskneutral prissättningsmodell tillämpades för att estimera sannolikheter att företagen går i konkurs. För att approximera kovariansmatrisen introduceras en ny tillämpning av 'single-index method'. De härledda optimeringsmodellerna visade på resultat som sammanfaller med finansiell teori angående risk, avkastning och diversifiering. En analys av möjligheterna för ett potentiellt skift i den dominerande processen påvisade att detta förmodligen ej kommer att ske inom en snar framtid. En återkommande anmärkning i detta examensarbete ar vikten av modellmedvetenhet och att således ha kunskap om de underliggande antaganden som modellen bygger på, vilket framgår av slutsatsen att kvantitativa metoderna enbart kan användas som ett verktyg och därav agera som ett underlag för beslutsfattande.
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Yu, Lili Ph D. Massachusetts Institute of Technology. "MoS₂ electronics : technology, high yield circuits and applications." Thesis, Massachusetts Institute of Technology, 2017. http://hdl.handle.net/1721.1/108993.
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Thesis: Ph. D., Massachusetts Institute of Technology, Department of Electrical Engineering and Computer Science, 2017.Cataloged from PDF version of thesis.
Includes bibliographical references (pages 177-186).
In the last few decades, the device community has explored a large number of technologies beyond silicon, that not only allow for further shrinkage in electronic systems size and power but can also provide new features, such as mechanical flexibility, large-area coverage at low cost thanks to inkjet printing, and simplified 3D integration. Two-dimensional electronics based on single-layer MoS₂ synthesized by chemical vapor deposition (CVD) offers significant advantages for realizing large-scale flexible systems owing to the ultrathin nature, excellent transport properties and stable crystalline structure of MoS₂. Despite all the progress, the MoS₂ electronics demonstrated so far is limited to single or few-device- scale circuits built on exfoliated flakes due to the many challenges associated with the uniformity and yield control in both material growth and device technologies. This thesis addresses issues which are crucial for realizing reliable, and high-yield complex circuits using emerging 2D materials, such as MoS₂: (1) Develop large-area material synthesis and transfer methods, as well as some of the first technologies for reliable enhancement mode MoS₂ transistors. (2) Design an automatic flow for fast implementation of complex circuits using MoS₂.Compact models and a process development kit (PDK) are developed for MoS₂ and are used to successfully implement both digital and analog circuits. (3) Study the sources of variability in MoS₂ devices and circuits and improve circuits yield by material, process, and device and circuit design co-optimization. (4) Demonstrate two system-level applications of CVD MoS₂: active matrix backplane circuits for transparent displays and radio frequency energy harvester. (5) Demonstrate the first air-stable CMOS technology monolithically integrated on WSe₂ to offer low power electronic solution. The future opportunities and potential challenges for all these technologies are also discussed. This thesis, in summary, provided important guidelines on how to take a new proof-of-concept material/device and make it into a useful technology to enable practical applications.
by Lili Yu.
Ph. D.
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Yosef, Sonia, and Julia Sommer. "High Yield – A Late Bloomer’s Time To Shine?" Thesis, KTH, Fastigheter och byggande, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-191509.
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Real estate companies are capital intense and bank loans represent the most common source of funding. However, the years following the latest financial crisis resulted in difficult terms and expensive bank loans, which cleared a path for alternative sources of funding. Small and me-dium-sized real estate companies displayed a particular interest in corporate bonds and ever since then the real estate sector have been overrepresented on the Swedish corporate bond mar-ket. Despite the growth during the past years, the Swedish market still appears to be underde-veloped compared to other countries. However, several trends are now indicating that High Yield is on the rise. New regulations that are currently being implemented will increase the costs for banks further and consequently make bank loans even more expensive. Simultane-ously, the current low interest-rate environment and volatile stock markets are increasing de-mand for High Yield alternatives among retail and institutional investors. This study investi-gates the High Yield market for small and medium-sized real estate companies and is built upon eleven interviews with professionals. It concludes that the market is underdeveloped because there has been no previous demand for it. Swedish banks and companies have traditionally had a synergetic relationship while investors relied on saving accounts and equities. The situation today is different; investors are demanding High Yield investments and the segment will most probably increase in the future. Real estate companies are positive to bonds and wish to increase the current ratio of their debt portfolio. There are however several barriers for continued growth, such as lack of knowledge, transparency, liquidity as well as fair pricing in the market. In the current state, corporate bond investments are suitable only for professional investors. The ex-emption is High Net Worth Individuals, who buy and hold, which are particularly suited for smaller corporate bonds.Fastighetsföretag bedriver kapitalintensiv verksamhet och den vanligaste finansieringsformen för svenska fastighetsföretag är idag banklån. Efter den senaste finanskrisen har dock bankut-låningen blivit mer restriktiv vilket särskilt har drabbat mindre företag. Till följd av detta har alternativa finansieringsformer blivit allt vanligare där företagsobligationer blivit särskilt in-tressanta för små och medelstora fastighetsföretag. Sedan finanskrisen har specifikt fastighets-företagen varit överrepresenterade på den svenska företagsobligationsmarknaden. Faktum är ändock att företagsobligationsmarknaden i Sverige, trots tillväxt de senaste åren, framstår som underutvecklad i jämförelse med andra länder. Flertalet trender pekar emellertid på att den kom-mer att fortsätta blomma ut. För närvarande implementeras nya regelverk som ökar kostnaderna för bankerna och potentiellt kommer att leda till större restriktioner och dyrare banklån. Vidare bidrar dagens låga ränteläge i kombination med volatila aktiemarknader till att efterfrågan på företagsobligationer bland investerare, privata såväl som institutionella, ökar. Studien undersö-ker företagsobligationsmarknaden inom High Yield segmentet för små och medelstora fastig-hetsföretag och bygger på elva intervjuer med yrkesverksamma. Det konkluderas att marknaden är underutvecklad då den ej har efterfrågats tidigare. De svenska bankerna och fastighetsföre-tagen har sedan länge en symbiotisk relation samtidigt som investerare har förlitat sig på spar-konton och aktier. Idag är situationen annorlunda där fler investerare efterfrågar High Yield produkter. Fastighetsföretagen är positiva till obligationer och önskar öka nuvarande andel i sina skuldportföljer. Det finns dock barriärer för den fortsatta tillväxten på marknaden, där-ibland brist på kunskap, transparens och likviditet samt ifrågasatt prissättning. Direktinveste-ringar i företagsobligationer idag lämpar sig därför för professionella investerare. Undantaget är kapitalstarka privatpersoner som ämnar att hålla instrumentet till förfall vilka lämpar sig sär-skilt bra som investerare i mindre företagsobligationer.
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Lopez, Vydrin Carlos Junior. "Forecasting High Yield Corporate Bond Industry Excess Return." Thesis, KTH, Matematisk statistik, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-223245.
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In this thesis, we apply unsupervised and supervised statistical learning methods on the high-yield corporate bond market with the goal of predicting its future excess return. We analyse the excess return of industry based indices of high-yield corporate bonds belonging to the Chemical, Metals, Paper, Building Materials, Packaging, Telecom, and Electric Utility industry. To predict the excess return of these high-yield corporate bond industry indices we utilised externally given market-observable financial time series from 96 different asset and indices that we believe to be of predictive value for the excess return. These input time series covers assets and indices of major equity indices, corporate credit spreads, FX-currencies, stock-, bond-, and FX volatility, swap rates, swap spreads, certain commodities, and macro economic surprise indices. After pre-processing the input data we arrive at 154 predictors that are used in a two-phase implementation procedure consisting of an unsupervised time series Agglomerative Hierarchical clustering and a supervised Random Forest regression model. We use the Hierarchical time series clustering and the Random Forest unbiased variable importance estimates as means to reduce our input predictor space to the ten most influential predictor variables for each industry. These ten most influential predictors are then used in a Random Forest regression model to predict [1, 3, 5, 10] day future cumulative excess return. To accommodate for the characteristics of sequential time series data we also apply a sliding window method to the input predictors and the response variable in our Random Forest model. The results show that excess returns in the various industries under study are predictable using Random Forest regression with our market-observable input data. The out-of-sample coefficient of determination R²out is in majority of the cases statistically significant at 0.01 level. The predictability varies across the industries and is in some cases dependent on whether we apply the sliding window method or not. Furthermore, applying the sliding window method on the predictors and the response variable showed in majority of the cases statistically significant improvements in the mean-squared prediction error. The variable importance estimates from such models show that the excess return time series exhibit some degree of autocorrelation.I denna uppsats applicerar vi oövervakade och övervakade statistiska inlärningsmetoder på marknaden för högavkastande företagsobligationer med målet om att predicera dess framtida överavkastning. Vi analyserar överavkastningen för industribaserade index av företagsobligationer tillhörande Kemi-, Metal-, Pappers-, Byggnadsmaterial-, Paketerings-, Telekom-, och Kraftförsörjningsindustrin. För att predicera överavkastningen i dessa högavkastande företagsobligations-industriindex använder vi externa marknadsobserverande finansiella tidserier från 96 olika tillgångsklasser och index som vi tror är av prediktiv värde för överavkastningen. Denna input tidsserier täcker tillgångar och index för välkända aktieindex, företagskredit-spreadar, valutor, aktie-, obligations, och valutavolatilitet, swap räntor, swap spreadar, vissa råvaror, och makroekonomiska överraskningsindex. Efter att ha processat inputsdata har vi 154 olika prediktorer som används i en två-fas implementeringsprocedur bestående av en oövervakad tidserie Agglomerativ Hierarkisk klustering och en övervakad Random Forest regressionsmodell. Vi använder den hierarkiska klusteringen och Random Forest fördomsfria variabel viktighetsuppskattningar som medel för att reducera inputsvariabelrummet till de tio mest inuerande prediktorvariablerna för varje industri. Dessa tio mest influerande prediktorer användes sedan i en Random Forest regressionsmodell för att predicera [1, 3, 5, 10] dagars kumulativ överavkastning. För att tillgodose för de egenskaper som sekventiell tidserie data uppvisar applicerar vi en Sliding Window metod på inputsprediktorerna och på själva responsvariabeln i vår Random Forest model. Resultaten visar att överavkastningen i de olika industrierna som vi studerar är förutspåbar när man använder Random Forest regression med vår marknadsobserverande inputsdata. Ur-samplings determinationskoefficienten R²out visar i de flesta fall på statistisk signifikans på en 0.01 nivå. Förutsägbarheten varierar över de olika industrierna och är i vissa fall beroende på om Sliding Window metoden är applicerad eller inte. Vidare visar resultaten att applicerandet av Sliding Window metoden på prediktorerna och responsvariabeln uppvisar i de flesta fallen på statistisk signifikant förbättring av dem medel-kvadrerade prediktionsfelet. Variabel viktighetsuppskattningarna från dessa modeller visar att överavkastning tidserierna uppvisar en viss grad autokorrelation.
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Kovilyanskaya, Helen. "On some aspects of investment into high-yield bonds." [S.l.] : [s.n.], 2005. http://deposit.ddb.de/cgi-bin/dokserv?idn=974191019.
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Jordan, Daniel L. "IMPACT OF HIGH-INPUT PRODUCTION PRACTICES ON SOYBEAN YIELD." UKnowledge, 2010. http://uknowledge.uky.edu/gradschool_theses/36.
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High-input management practices are often heavily marketed to producers to increase soybean [Glycine max (L) Merr.] yield in already high-yielding environments. Field research was conducted in three locations within 6 states (Arkansas, Iowa, Kentucky, Louisiana, Michigan, and Minnesota) in 2009 to determine the effect of seed treatment, inoculant, foliar fungicide, additional soil fertility beyond state recommendations, foliar fertilizer, increased population over state recommendations, and narrow row spacing on yield. The high-input system (combination of the management practices) yielded higher than standard-input system (University recommended management practices) in only 8 of the 18 locations. Narrow rows, in both the high and standard-input systems, only increased yield in 4 locations. Inoculant did not increase yield at any location. Foliar fertilizer application and seed treatment increased yield in one location each. The additional soil fertility and fungicide application increased yield in two locations each. The increased population increased yields in 3 of the 18 locations; while an additional fungicide application at R5 only increased yield in 1 location. Foliar fertilizers at rates above commercial use did not increase soybean yield in Kentucky in 2008 or 2009. High-input production practices were largely unsuccessful at increasing soybean yield in these studies.
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Quiddington, Christopher John. "Stabilisation of high-yield pulp against photo-induced discolouration." Thesis, University of Kent, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.342138.
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Khidhir, Khalid. "High-yield (fault-directed) approach to test suite evaluation." Thesis, University of Ottawa (Canada), 2002. http://hdl.handle.net/10393/6146.
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Given a test suite T designed to test a program P, there are at least three attributes of T, which can be used to assess T's effectiveness. The first attribute is its Completeness measured by Code Coverage when P is executed on all the tests in T. The second attribute is Adequacy or Fault Coverage of the test suite T, which is the ability of the test suite T to exercise P so that for every fault (according to some fault model) in P there is at least one test case in T that will detect it. The third attribute is Requirements Coverage, which checks for every requirement R whether there is at least one test case in T that will demonstrate the conformance of the program P to the function described by R. In this thesis we will evaluate the effectiveness of an industrial test suite by measuring the first attribute and estimating the second. In this case T is a Java conformance test suite, and P is a Java compiler. We show that basic coverage measurement techniques and a simple fault model can be used to obtain useful preliminary data early in the testing phase of the software development life cycle. This was the case in our case study. The technique is low-cost and allows the enhancement of conformance test suite for languages, protocols, or any standard specification.
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Reis, Amy Lynne. "A study of the performance of high yield bond funds." Thesis, Massachusetts Institute of Technology, 1987. http://hdl.handle.net/1721.1/37698.
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Bluck, Grace M. "Soybean Yield Response in High and Low Input Production Systems." The Ohio State University, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=osu1428078516.
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Hardison, Ashley. "Achieving Literacy Excellence through Identifying and Utilizing High Yield Strategies." Thesis, Pepperdine University, 2017. http://pqdtopen.proquest.com/#viewpdf?dispub=10640616.
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The purpose of this study was to delve into the literacy instructional strategies of selected high-performing K-2 teachers in a Clark County, Nevada school district. The study assessed the efficacy of teachers using five core literacy components: phonemic awareness, phonics, vocabulary, fluency, and comprehension for student achievement. High performing teachers were defined as consistently demonstrating student performance gains of 25% in at least one of the five core literacy components over a 3-year period. The research question for this study was: What instructional strategies are used by selected high-performing K-2 teachers who work with diverse populations that have demonstrated a minimum gain of 25% in reading as measured by AIMSweb to develop (a) phonemic awareness, (b) phonics, (c) fluency, (d) vocabulary, and (e) comprehension?
The study used a qualitative method of data collection and analysis through in-depth teacher interviews, classroom observations, and district-wide data analysis. Interviews were open-ended and observations involved six teachers during their classroom literacy instructional time. Checklists were used to facilitate data collection during observations. Classroom pictures, teachers’ lesson plans, and AIMSweb data were used to support results.
The findings revealed that the most successful literacy strategies for teaching the five components of literacy were: phonemic awareness (word manipulation, word play, and word sort), phonics (word study, sound/spelling, and decoding/encoding), fluency (choral reading, repeated timed reading, partner/student-adult reading, and reading connected text with corrective feedback), vocabulary (explicit instruction on word meaning/independent word learning, direct instruction on new vocabulary, and context clues), and comprehension (predicting, inferring, making connections, using graphic organizers, and activating/building on prior knowledge). In addition, study conclusions revealed that the most successful strategies for teaching K-2 literacy included teacher collaboration and planning; strategic use of individual, small, and whole grouping; and integrating technology.
Several recommendations emerged from the study. Teachers need to be given ongoing professional development and resources for teaching the five component specific literacy strategies. Time needs to consistently be allotted for teachers to collaborate and plan for literacy instruction. Exploring diverse student populations, and their literacy acquisition needs, is vital to the education of youth. Placing emphasis on differentiated instruction, study replication, and analyzing literacy strategies and acquisition practices using varied methodologies will improve educational outcomes.
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Gällström, Arvid, and Tim Eriksson. "High Yield - En investeringsform för framtiden : En studie om företagsobligationer med hög risk." Thesis, Uppsala universitet, Företagsekonomiska institutionen, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-167520.
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Oey, Melanie. "Chloroplasts as bioreactors : high-yield production of active bacteriolytic protein antibiotics." Phd thesis, Universität Potsdam, 2008. http://opus.kobv.de/ubp/volltexte/2009/2895/.
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Plants, more precisely their chloroplasts with their bacterial-like expression machinery inherited from their cyanobacterial ancestors, can potentially offer a cheap expression system for proteinaceous pharmaceuticals. This system would be easily scalable and provides appropriate safety due to chloroplasts maternal inheritance. In this work, it was shown that three phage lytic enzymes (Pal, Cpl-1 and PlyGBS) could be successfully expressed at very high levels and with high stability in tobacco chloroplasts. PlyGBS expression reached an amount of foreign protein accumulation (> 70% TSP) that has never been obtained before. Although the high expression levels of PlyGBS caused a pale green phenotype with retarded growth, presumably due to exhaustion of plastid protein synthesis capacity, development and seed production were not impaired under greenhouse conditions.
Since Pal and Cpl-1 showed toxic effects when expressed in E. coli, a special plastid transformation vector (pTox) was constructed to allow DNA amplification in bacteria. The construction of the pTox transformation vector allowing a recombinase-mediated deletion of an E. coli transcription block in the chloroplast, leading to an increase of foreign protein accumulation to up to 40% of TSP for Pal and 20% of TSP for Cpl-1. High dose-dependent bactericidal efficiency was shown for all three plant-derived lytic enzymes using their pathogenic target bacteria S. pyogenes and S. pneumoniae. Confirmation of specificity was obtained for the endotoxic proteins Pal and Cpl-1 by application to E. coli cultures. These results establish tobacco chloroplasts as a new cost-efficient and convenient production platform for phage lytic enzymes and address the greatest obstacle for clinical application. The present study is the first report of lysin production in a non-bacterial system. The properties of chloroplast-produced lysins described in this work, their stability, high accumulation rate and biological activity make them highly attractive candidates for future antibiotics.Lytische Enzyme aus Bakteriophagen bieten Eigenschaften, die sie zu vielversprechenden Medikamenten im Einsatz gegen bakterielle Krankheiten machen. Obwohl sie speziell beim Einsatz gegen bakterielle Infektionen, welche durch Antibiotika resistente Erreger hervorgerufen werden, eine maßgebende Rolle spielen könnten, waren bisher die hohen Produktionskosten ein Hindernis für die medizinische Anwendung. Ein kostengünstiges und einfach zu handhabendes System, wie beispielsweise Chloroplasten in Pflanzen, würde diese lytischen Enzyme zu einer effizienten Alternative zu herkömmlichen Antibiotika machen. In dieser Arbeit wird erstmals die erfolgreiche Produktion von lytischen Enzymen in Tabak-Chloroplasten vorgestellt, welche mit einem Fremdproteingehalt von mehr als 70% des gesamtlöslichen Proteins der Pflanze eine Menge beschreibt, die bisher mit diesem Verfahren noch nicht erreicht wurde. Alle in Chloroplasten hergestellten lytischen Enzyme zeigten hohe spezifische bakteriolytische Aktivität gegen die gewählten Humanpathogene und waren innerhalb von Minuten in der Lage diese Bakterien abzutöten. Zur Herstellung von zwei lytischen Enzymen wurde in dieser Arbeit ein spezieller Shuttle-Vektor entworfen, der die Expression von toxischen Genen innerhalb von E. coli Zellen im Zuge der DNA Replikation vermeidet, jedoch die Herstellung einer ungehinderten Expression der toxischen Gene in den Chloroplasten nach Beseitigung des Selektionsmarkers erlaubte. Ein Vergleich zwischen einem herkömmlich verwendeten Transformationsvektor und dem Shuttle-Vektor mittels eines Reportergens zeigte, dass das neu entwickelte System bis zu 4 mal mehr Protein produzierte. Diese Ergebnisse zeigen das Potential von Chloroplasten als kostengünstige und leicht zu handhabende Produktionsplattform für lytische Enzyme, welche als neue Generation von Antibiotika attraktive Alternativen zu herkömmlichen Therapien bieten.
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Toubia, Gracia J. "A sequential Bayesian cumulative conformance control chart for high yield processes." Diss., Wichita State University, 2009. http://hdl.handle.net/10057/2377.
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For mass production, the traditional approach of drawing the confidence limits was
satisfactory when many bad units were being produced; however, the same approach becomes
ineffective for high yield processes, when the defective rates have small magnitudes, such as
parts per million. In particular, the traditional p-control charts used to control nonconformance
rates present many problems when p, the rate of nonconformance, is small. One problem is an
increase in the probability of false alarm, and another is the increase in sample size, sometimes
making the extremely large size of the sample prohibitive. The biggest problem with the pcontrol
chart is discussed by Brown, Cai and DasGupta (2001), where the theory of the normal
approximation to the binomial distribution is debunked and the need for rewriting the chapter on
binomial distribution in statistics textbooks is suggested. Many rejoinders to this work also
agree on this important discussion.Thesis (Ph.D.)--Wichita State University, College of Engineering, Dept. of Industrial and Manufacturing Engineering
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Kittock, David L., Wallace C. Hofmann, B. Brooks Taylor, Peter T. Else, Joel Malcuit, and Carl Michaud. "Emergence and Yield from High and Low Quality Upland Cotton Seed." College of Agriculture, University of Arizona (Tucson, AZ), 1985. http://hdl.handle.net/10150/204030.
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Kittock, D. L., W. C. Hofmann, J. Malcuit, P. Else, and C. Michaud. "Emergence and Yield from High and Low Quality Upland Cotton Seed." College of Agriculture, University of Arizona (Tucson, AZ), 1986. http://hdl.handle.net/10150/219704.
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The 1985 and 1986 Cotton Reports have the same publication and P-Series numbers.Low quality Deltapine (DP) 41 seed had lower germination, lower cold test germination, reduced stand, and reduced lint yield in four tests in Arizona in 1985.
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Liang, Sheng-Chiech. "High yield and reliable sorting networks for VLSI and WSI implementations." Diss., The University of Arizona, 1991. http://hdl.handle.net/10150/185520.
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In this dissertation, a novel approach to on-line error detection and correction for high throughput VLSI sorting arrays is presented first. Two-level pipelining is employed in the design which makes the proposed VLSI sorting array very efficient and suitable for real-time applications. All the checkers are designed as totally self-checking circuits such that the resulting sorting array is extremely reliable. Next, in order to overcome the yield problem in WSI implementations a novel hierarchical modular sorting network is presented. More regularly structured equivalent sorting networks are introduced by replacing shuffle interconnections in the original sorting network with easily reconfigurable interconnections. Redundancy is provided at every level of the hierarchy. Hierarchical reconfiguration is implemented by replacing the defective cells with spare cells at the bottom level first, and goes to the next higher level. Yield analysis is performed to demonstrate the effectiveness of our approach. Efficient implementation of parallel sorting algorithms for mesh-connected processor arrays are also considered in this dissertation. The trapezoid sort which has the properties of very simple control hardware and ease of implementation for mesh-connected processor arrays is developed. Its advantage is that the number of iterations is improved significantly compared with the existing parallel sorting algorithms on mesh-connected processor arrays. Based on this algorithm, an efficient method is proposed to find the median value of the input elements. The elements outside the boundary are excluded from the remaining sorting process to reduce the time complexity. This method is then extended to finding the kth smallest element in the input array. Finally, if the number of elements to be sorted is larger than N, the trapezoid sort algorithm can not be applied directly. Therefore, a modified odd-even merge procedure is presented to merge m sorted input sets. The modified odd-even merge procedure can sort two sets of data inputs concurrently by utilizing the idle processors and then merge them together. A speedup of O(log₂m) over the previous merge-split method is achieved.
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Mehos, Stephen C. (Stephen Charles). "High yield bond new issues used to finance acquisitions during 1993." Thesis, Massachusetts Institute of Technology, 1994. http://hdl.handle.net/1721.1/12088.
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Wolfe, David. "An Empirical Investigation into the Performance of High-Yield Bond Issuers." ScholarWorks@UNO, 2006. http://scholarworks.uno.edu/td/465.
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A vast amount of academic research focuses on how bond issuance impacts the firm. Most recent research focuses on investment grade bonds and ignores non-investment grade bonds. Chapter 1 investigates firms issuing high-yield debt and the impact on their stock price by identifying determinants of the negative abnormal return that surrounds the announcement of an issue in the short-run. It is learned the length, coupon payment and amount of the issue are significant in explaining the CAR as is the age of the firm, first-time issuers and the marketplace where its stock trades. Firm performance ratios including the current and total-asset-turnover ratio also have explanatory power. These determinants of the CAR have an explanatory power approaching 55%. Chapter 2 uses an ordinary least squares technique similar to Chapter 1 to capture determinants of the pricing decision for high-yield bond offerings. I find the coupon amount, the years to maturity, bonds issued for refinancing purposes and callable bonds are significant determinants in the spread at issuance. The exchange in where the firms stock trades and bullish market conditions are also of significance. It is determined these variables have roughly 52% explanatory power over the spread. Chapter 3 looks at long-run stock underperformance of high-yield bond IBOs' in the 3-5 year post issuing period compared to firms that do not issue stock and\or bonds over the same 5-year post period. A second dataset featuring investment grade bond issuing firms is also compared to firms that do not issue stocks and\or bonds over the same 5-years post period. It is determined that stock underperformance does exist following bond IBOs' using both the Buy-and-Hold return and Fama-French Four-Factor models. The level of underperformance is found to be greatest for callable bonds issuers followed by straight bonds and convertible bond issuers. Additionally, it is learned that high-yield bond issuing firms experience a greater level of underperformance than their investment-grade counterparts. This line of research partially fills the gap in understanding how non-investment grade bonds impacts the firm in both stock performance and the pricing decision.
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Yang, Qi-Zhong. "Yield analysis of split-gate quantum wires in high mobility heterostructures." Thesis, University of Cambridge, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.612057.
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Du, Yinming. "High-Yield and High-Titer n-Butanol Production from Lignocellulosic Feedstocks by Metabolically Engineered Clostridium tyrobutyricum." The Ohio State University, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=osu1374193011.
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Wedin, Helena. "Aspects of extended impregnation kraft cooking for high-yield pulping of hardwood." Doctoral thesis, KTH, Träkemi och massateknologi, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-94010.
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The long-term trend regarding wood is an increase in price. Because wood contributes to a large part of production costs, the efficient utilisation of wood is greatly desired to reduce production costs for kraft pulp producers. During the 1990s, the development of improved modified kraft cooking began, which led to higher yields. There was also a trend of terminating kraft cooking at a higher kappa number to maximise the overall yield. For hardwood, the defibration point became a critical setback in allowing this termination at a high kappa number. This thesis discusses how this issue has been tackled in the laboratory by using improved modified kraft cooking combined with extended impregnation to enable a decrease in reject content and shift the defibration point towards a higher kappa number for hardwood. This lab concept is referred to as extended impregnation kraft cooking (EIC), and this thesis reveals that EIC cooking efficiently reduces the reject content for both birch and eucalypt. By using EIC cooking, the defibration point was shifted to a kappa number of ca. 30 from ca. 20 using conventional kraft cooking. This study demonstrates the great potential for achieving a higher overall yield for eucalypt by terminating the EIC cooking at a high kappa number, but with the conditions used in this thesis, no improvement in yield was observed for birch. An important issue is that the termination of kraft cooking at high kappa number increases the demand for extended oxygen delignification to reach a similar kappa number into bleaching, i.e., due to cost and environmental reasons. Extended oxygen delignification was shown to be possible for both birch and eucalypt EIC pulps (i.e., from kappa number 27 to 10) with an acceptable pulp viscosity number. The other part of this thesis addresses aspects regarding the limitations in oxygen delignification. It has previously been shown in the literature that a high xylan yield of kraft cooking could negatively affect the efficiency of subsequent oxygen delignification. In this work, the increased xylan content in eucalypt kraft pulp within the range of 8–18% had only a marginally negative impact on the oxygen delignification efficiency after correcting for the HexA contribution to the kappa number. It is also desired to extend the oxygen delignification towards lower kappa number, i.e., below kappa number 10 to decrease the bleaching chemical requirement. In this study, the hypothesis that the reduced efficiency of oxygen delignification at low kappa numbers could partly be due to the formation of oxidisable carbohydrate-related structures (i.e., HexA and/or other non-lignin structures) was also tested. No formation was established. On the other hand, a final oxygen delignification stage in the bleaching could be an attractive alternative for reducing yellowing and enhancing brightness; in fact, this has led to the development of a patent (SE 528066).Ved står för en stor del av produktionskostnaderna vid framställning av sulfatmassa. Då vedpriserna har ökat genom åren är ett effektivt utnyttjande av veden önskvärt för att kunna sänka produktionskostnaderna. Under 1990-talet förbättrades den modifierade sulfatkokningen vilket innebar möjlighet till högre massautbyte. För att maximera massautbytet styrdes kokningsprocessen mot ett högre kappatal. Detta har visat sig vara svårare för lövved än för barrved, eftersom defibrerbarhetspunkten utgör ett kritiskt hinder. I denna avhandling har laborationsstudier utförts där förbättrad modifierad sulfatkokning kombinerats med förlängd impregnering för att kunna sänka spethalten och därmed förskjuta defibrerbarhetspunkten mot ett högre kappatal. Detta koncept kallas för extended impregnation kraft cooking (EIC). EIC-kokning visade sig vara en effektiv metod för att minska spethalten hos björk och eukalyptus. Med EIC-kokning kunde defibrerbarhetspunkten höjas från cirka 20 till cirka 30. I denna avhandling klarläggs att det finns stora möjligheter att öka massautbytet för eukalyptus genom att avsluta sulfatkoket vid ett högre kappatal. För björk kunde ingen ökning av massutbytet uppnås genom ovanstående metod. Vid ett högre kappatal efter sulfatkoket ställs även krav på förlängd syrgasdelignifiering, för att kunna behålla samma kappatal in till blekeriet. Det visade sig vara fullt möjligt att förlänga syrgasdelignifieringen för de EIC-kokade björk- och eukalyptusmassorna (d.v.s. från kappatal 27 till 10) med accepterad massaviskositet. Den andra delen av avhandlingen tar upp aspekter på syrgasdelignifieringens begränsningar. Tidigare studier har visat att ett högre utbyte av xylan vid sulfatkokning kan vara negativt för syrgasdelignifieringens effektivitet. I denna studie har det påvisats att en ökad xylanhalt i intervallet 8–18 procent i eukalyptusmassa endast har en marginell negativ inverkan på syrgasdelignifieringens effektivitet efter att kappatalet korrigerats för HexA. Det är önskvärt att förlänga syrgasdelignifieringen till ett lägre kappatal än 10 för att minska förbrukningen av blekkemikalier. I den här studien prövades hypotesen att syrgasdelignifieringens begränsningar vid låga kappatal, under 10, delvis skulle kunna bero på bildning av oxiderbara kolhydratrelaterade strukturer (d.v.s. HexA och/eller andra okända ”non-lignin”-strukturer). Ingen bildning kunde dock observeras. Däremot indikerades att ett syrgassteg i slutet av bleksekvensen skulle kunna vara ett eftersträvansvärt alternativ för minskad eftergulning och ökad ljushet, vilket ledde till ett patent (SE 528066).
QC 20120507
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Santos, Daniel dos [Verfasser]. "Development of an alloyed high yield ductile iron -HYDI- / Daniel dos Santos." Aachen : Shaker, 2010. http://d-nb.info/1080766847/34.
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McGovern, Lawrence P. "Analysis of interconnect yield for a high throughput flip chip assembly process." Thesis, Georgia Institute of Technology, 1998. http://hdl.handle.net/1853/16605.
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Tang, Louis (Ruo Biao). "Plate yield slenderness criteria for structural members fabricated from high strength steels." Queensland University of Technology, 2008. http://eprints.qut.edu.au/20724/.
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Increasing demand from flourishing construction markets led to the successful development of high strength steels (HSS). The new structural steel has exceptional high strength, high fracture toughness, long fatigue life, high corrosion resistance, and better weldability making the material attractive for structural design applications in the modern steel buildings and bridges. With their high strength, typically in the range of 500~700 MPa, and reduced weight/dimensions, it frees imaginations of modern designers and opens up new possibilities. Although HSS cost more, this is more than offset by reduced fabrication and erection costs. The advantage of the intrinsic properties of the HSS makes it possible to achieve successful applications in a cost-effective manner. At present, the Australian steel design standard, AS 4100 (SA, 1998), is limited to conventional low strength steels (LSS) with yield stress less than 450 MPa, (i.e. fy . 450 MPa). As a result steel structural members fabricated from HSS in Australia are usually designed according to overseas specifications, such as AISC-LRFD (AISC, 2003) which allows the design for structures fabricated from HSS materials. However, the design provisions of AISC-LRFD were mainly based on experimental and analytical studies on standard LSS. HSS exhibits mechanical properties that are quite different from conventional LSS. On the other hand, the design procedure and approach of the American specifications (AISC, 2003) are unfamiliar with Australian design engineers, which explains why practising engineers in Australia are reluctant to use AISC-LRFD specification in the design of HSS members. Therefore research into the behaviour of HSS members is essential to address this shortcoming. However, since the use of HSS often leads to smaller sections, hence thinner plates, the elastic and inelastic instability of these thin-walled and HSS members become highly critical. Conservatively, the local instabilities of the constituent plate element interactions in the cross-section have been ignored in the current steel practices. Increasing the slenderness of either plate elements within a cross-section leads to a significant reduction in the section capacity of the structural member. Therefore, the interactive effects between flange and web plate elements have to be considered in the strength, stability and deformation studies of HSS members. Furthermore, the current definitions and values of the plate slenderness limits also vary among major steel design codes (AS4100, 1998; AISC, 2003; EN1993, 2003; BS5950, 2000). The main aim of this research project is to investigate the structural behaviour of Ishaped HSS members subjected to local buckling effects in the elastic and inelastic ranges. For this purpose, it will use advanced numerical analyses and laboratory experiments to study the structural behaviour of these HSS members in compression and bending, respectively. The critical review has found that various inconsistencies among the major steel design specifications (AS4100, 1998; AISC, 2003; EN1993, 2003, BS5950, 2000) in the current practice produce conflicting design predictions of section capacities. The experimental measurements of residual stress distributions have confirmed that the ECCS recommendation (1984) is inappropriate for crosssections fabricated from typical HSS materials (i.e. BISPLATE80). The experimental measurements and numerical studies carried out in this project have produced a better understanding of the structural behaviour of HSS members subjected to local instabilities. The study has enabled to provide a series of proposals for proper assessment of plate slenderness limits for structural members made of HSS materials. It may also enable the inclusion of future version of the AS4100 code for HSS materials to be used in the design of steel building and bridge constructions. It is believed that the use of HSS in building and bridge constructions will increase significantly in the very near future, and to fully-facilitate this, the future versions of national and international steel design specifications must include rational and reliable design rules for members made of all steel grades by including the effects of HSS special characteristics and true interactive local buckling behaviour of HSS members. This research project has contributed towards this.
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Spender, Jonathan. "Photostabilization of High-Yield Pulps Reaction of Thiols and Quinones with Pulp." Fogler Library, University of Maine, 2001. http://www.library.umaine.edu/theses/pdf/SpenderJ2001.pdf.
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Opole, Rachel Adoyo. "Effect of environmental stress and management on grain and biomass yield of finger millet (Eleusine coracana (L.) Gaertn.)." Diss., Kansas State University, 2012. http://hdl.handle.net/2097/13964.
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Doctor of PhilosophyDepartment of Agronomy
P.V. Vara Prasad
Productivity of grain crops is highly sensitive to changing climates and crop management practices. Response of finger millet [Eleusine coracana (L.) Gaertn.] to high temperature stress, and intensive management practices such as increased seeding rates and fertilizer application are not clearly understood. The objectives of this research were to determine the effects of (a) season-long, and short episodes of high temperature stress on growth and yield traits of finger millet, (b) seeding rates and nitrogen fertilizer application rates on grain and biomass yield, and (c) to evaluate the finger millet minicore collection for high grain and biomass yield. Controlled environment studies were conducted to determine the effects of high temperature stress on physiological, growth and yield traits. Field studies were conducted in Manhattan and Hays (Kansas) and Alupe (Kenya) to determine the effects of seeding and nitrogen fertilizer rates on growth and yield traits. Finger millet minicore collection was evaluated under field conditions in India, for phenology, growth and yield traits. Season long high temperature stress of 36/26 or 38/28°C compared to 32/22°C decreased panicle emergence, number of seeds per panicle, grain yield and harvest index. Finger millet was most sensitive to short episodes (10 d) of high temperature (40/30°C) during booting, panicle emergence and flowering stages, resulting in lower number of seeds, and grain yield. Finger millet responded to the interaction between environmental (locations) and temporal (years) factors. In general, locations with higher rainfall had greater grain and biomass yield than those with low rainfall. There was no influence of seeding rates (3.2 or 6.0 kg ha[superscript]-1) at Hays and Alupe. However, in one of the two years in Manhattan, higher seeding rate of 6.0 kg ha[superscript]-1 increased grain yield compared to 3.2 kg ha[superscript]-1. There was no influence of nitrogen rates (0, 30, 60 or 90 kg ha[superscript]-1) on grain or biomass yield at all three locations. However, higher fertilizer rates had greater percentage lodging. The finger millet minicore collection displayed large ranges for most quantitative traits including days to flowering, plant height, number of fingers panicle[superscript]-1, grain yield, biomass yield, and lodging; and had >60% heritability. Some of the genotypes from the minicore collection have the potential to increase grain and biomass yield and abiotic stress tolerance of finger millet.
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Monaghan, James Malcolm. "Physiological and genetical analysis of high grain protein concentration, high yield trait in winter wheat (Triticum aestivum L.)." Thesis, Open University, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.361593.
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Kanai, M., A. Koshio, H. Shinohara, T. Mieno, A. Kasuya, Y. Ando, and X. Zhao. "High-yield synthesis of single-walled carbon nanotubes by gravity-free arc discharge." American Institute of Physics, 2001. http://hdl.handle.net/2237/6984.
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Tsai, Wen-Kai Mike. "High yield flip chip processing and failure mode analysis for surface mount applications." Thesis, Georgia Institute of Technology, 2000. http://hdl.handle.net/1853/17063.
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史賢明 and Xianming Shi. "High yield production of lutein by Chlorella protothecoides under heterotrophic conditions of growth." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1998. http://hub.hku.hk/bib/B31237666.
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Ibrahim, Imad. "Fabrication of high yield horizontally aligned single wall carbon nanotubes for molecular electronics." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2014. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-117433.
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The extraordinary properties of the single wall carbon nanotubes (SWCNTs) have stimulated an enormous amount of research towards the realization of SWCNT-based products for different applications ranging form nanocomposites to nanoelectronics. Their high charge mobility, exceedingly good current-carrying capacities and ability to be either semiconducting or metallic render them ideal building blocks for nanoelectronics. For nanoelectronic applications, either individual or parallel aligned SWCNTs are advantageous. Moreover, closely packed arrays of parallel SWCNTs are required in order to sustain the relatively large currents found in high frequency devices. Two key areas still require further development before the realization of large-scale nanoelectronics. They are the reproducible control of the nanotubes spatial position/orientation and chiral management. In terms of nanotube orientation, different techniques have been demonstrated for the fabrication of horizontally aligned SWCNTs with either post synthesis routes (e.g. dielectrophoresis and Langmuir-Blodgett approach) or direct growth (e.g. chemical vapor deposition (CVD)). The low temperature of the production process, allowing the formation of aligned nanotubes on pretty much any substrate, is the main advantage of the post synthesis routes, while the poor levels of reproducibility and spatial control, and the limited quality of the aligned tubes due to the inherently required process steps are limitations. The simplicity, up-scalability, along with the reproducible growth of clean high quality SWCNTs with well-controlled spatial, orientation and length, make CVD the most promising for producing dense horizontally well-aligned SWCNTs. These CVD techniques suffer some drawbacks, namely, that because they are synthesized using catalyst particles (metals or non-metals) the catalyst material can contaminate the tubes and affect their intrinsic properties. Thus, the catalyst-free synthesis of aligned SWNT is very desirable. This thesis comprises detailed and systematic experimental investigations in to the fabrication of horizontally aligned SWCNTs using both post growth (Dielectrophoresis) and direct growth (CVD) methods. Both catalyst-assisted and catalyst-free SWCNTs are synthesized by CVD. While metallic nanoparticles nucleate and grow SWCNTs, opened and activated fullerene structures are used for all carbon catalyst-free growth of single wall and double wall carbon nanotubes. The systematic studies allow for a detailed understanding of the growth mechanisms of catalyst and catalyst-free grown SWCNTs to be elucidated. The data significantly advances our understanding of horizontally aligned carbon nanotubes by both post synthesis alignment as well as directly as-synthesized routes. Indeed, the knowledge enables such tubes to be grown in high yield and with a high degree of special control. It is shown, for the first time, how one can grow horizontally aligned carbon nanotubes in crossbar configurations in a single step and with bespoke crossing angles. In addition, the transport properties of the aligned tubes at room temperature are also investigated through the fabrication of devices based on these tubesDie außergewöhnlichen Eigenschaften von einwandigen Kohlenstoffnanoröhren (engl. single wall carbon nanotubes, SWCNTs) haben bemerkenswerte Forschungsaktivitäten zur Verwirklichung von auf SWCNTs basierenden Anwendungen für verschiedene Bereiche, die von Nanokompositen bis hin zur Nanoelektronik reichen, stimuliert. Ihre hohe Ladungsträgermobilität und die außerordentlichen hohen Ladungsdichten, die in SWCNTs erreicht werden können sowie ihre Eigenschaft, entweder halbleitend oder metallisch zu sein, machen sie zu idealen Konstituenten von nanoelektronischen Schaltkreisen. Für Anwendungen in der Nanoelektronik sind entweder einzelne oder parallel angeordnete SWCNTs vorteilhaft. Darüber hinaus sind dicht gepackte Anordnungen von SWCNTs erforderlich, um die relativ hohen Ströme in Hochfrequenzbauelementen zu transportieren. Für eine erfolgreiche Realisierung von großskaligen nanoelektronischen Bauteilen, die auf SWCNTs basieren, sind noch zwei enorm wichtige Kernprobleme zu lösen, die weitere Forschungsanstrengungen erfordern: die reproduzierbare und verlässliche Kontrolle der räumlichen Positionierung und Orientierung der Nanoröhren sowie die Kontrolle der Chiralität der einzelnen SWCNTs. Hinsichtlich der Orientierung der Nanoröhren kann die horizontal parallele Ausrichtung von SWCNTs mit verschiedenen Techniken erreicht werden. Diese setzen entweder nach dem eigentlichen Wachstum der Röhren ein (Post-Synthese-Methoden wie z.B. Dielektrophorese oder Langmuir-Blodgett-Techniken) oder erreichen direkt während des Wachstums (z.B. durch Chemical-Vapor-Deposition-Methoden (CVD)) die parallele Anordnung. Durch die niedrigen Prozesstemperaturen, die während des Herstellungsprozesses erforderlich sind, erlauben die nach der eigentlichen Synthese stattfindenden Ausrichtungsmethoden die parallele Anordnung von Nanoröhren auf nahezu jedem Substrat, jedoch stellen die geringe Reproduzierbarkeit dieser Prozesse, die schwierige Kontrollierbarkeit der räumlichen Anordnung und die limitierte Qualität der ausgerichteten Röhren aufgrund der erforderlichen Prozessschritte natürliche Beschränkungen dieser Techniken dar. Die einfache Durchführung und ihre Skalierbarkeit, zusammen mit dem reproduzierbaren Wachstum qualitativ sehr hochwertiger SWCNTs mit hoher Kontrolle von räumlicher Anordnung, Orientierung und Länge machen die CVD-Methode zur erfolgversprechendsten Technik für die Herstellung von dichtgepackten hochparallelen horizontalen Anordnungen von SWCNTs. Diese CVD-Ansätze weisen jedoch auch einige Nachteile auf, die in den bei der Synthese verwendeten Katalysatorpartikeln (metallisch oder nicht-metallisch) begründet liegen, da das Katalysatormaterial die Röhren kontaminieren und dadurch ihre intrinsischen Eigenschaften beeinflussen kann. Daher ist eine katalysatorfreie Synthesemethode für ausgerichtete SWCNTs ein höchst erstrebenswertes Ziel. Die vorliegende Arbeit beschreibt detaillierte und systematische experimentelle Untersuchungen zur Herstellung von horizontalen, parallel ausgerichteten Anordnungen von SWCNTs unter Verwendung von Methoden, die sowohl nach dem eigentlichen Wachstum der Nanoröhren (Dielektrophorese) als auch während des Wachstums ansetzen (CVD). Bei den CVD-Methoden werden sowohl solche, die auf der Verwendung von Katalysatoren basieren, als auch katalysatorfreie Techniken verwendet. Während metallische Nanopartikel den Ausgangspunkt für das Wachstum von SWCNTs darstellen, werden geöffnete und aktivierte Fullerenstrukturen verwendet, um das katalysatorfreie Wachstum von reinen ein- oder mehrwandigen Nanoröhren zu erreichen. Die systematischen Untersuchungen ermöglichen ein tiefgehendes Verständnis der Wachstumsmechanismen von SWCNTs, die unter Verwendung von Katalysatoren oder katalysatorfrei erzeugt synthetisiert wurden. Die erzielten Ergebnisse erhöhen in einem hohen Maß das Verständnis der Herstellung von horizontal parallel angeordneten Nanoröhren, die durch Post-Synthese-Methoden oder direkt während des Wachstumsprozesses ausgerichtet wurden. Die erzielten Einsichten erlauben die Herstellung solcher Strukturen mit hoher Ausbeute und mit einem hohen Maß an räumlicher Kontrolle der Anordnung. Zum ersten Male kann ein Verfahren präsentiert werden, mit dem horizontal parallel angeordnete Nanoröhren in gekreuzten Strukturen mit wohldefinierten Kreuzungswinkeln hergestellt werden können. Zusätzlich werden die Transporteigenschaften von parallel ausgerichteten Nanoröhren bei Raumtemperatur, durch die Herstellung von auf den dargestellten Strukturen basierenden Bauelementen, untersucht
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Nkyi, Kwaku Appiagyei. "An integrated growth and yield model for the tropical high forests of Ghana." Thesis, University of Aberdeen, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.311286.
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A description of the development and subsequent use of an integrated and semi-stochastic computer simulation model, GHAFORGROM (Ghana Forest Growth and Yield Simulation Program), designed to investigate forest tree dynamics and also predict growth and yield of timber in the tropical forests of Ghana is presented. This simulator considers many aspects of natural forest growth including species-group-specific individual tree diameter growth based on competition, mortality and recruitment. The 687 tree species used in these studies have been aggregated into 13 species groups. The simulator is based on a new individual tree-based distance-dependent diameter increment model. Diameter increment of a tree is predicted by a multiplicative composite function of initial diameter, relative tree dominance index, and (or) categorical site index. The based function of diameter increment on diameter is an extension of a power-exponential growth function. The relative tree dominance index of a subject tree is defined in terms of a new competition index. This index is the sum of the ratios of volume of overtopping competing trees to the volume of the subject tree, where the competitor trees are within a radius of 20 m of the subject tree for large-sized trees and 1.5 m of the subject tree for medium- and small-sized trees. The probability of mortality of a tree is defined in the form of a logistic function based on the explanatory variables of functions of diameter and stand density, including basal area per hectare and volume per hectare for each species group. The total amount of recruitment at 10 cm diameter is predicted as a linear function of stand basal area, stand volume and categorical site variables. It is hoped that the model will provide practical steps to improved natural tropical forest management in Ghana, leading to higher sustainable timber yields.
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Salamé, Donoso Teresa Paola. "Effects of high tunnel production on Florida strawberry growth, yield and postharvest quality." [Gainesville, Fla.] : University of Florida, 2009. http://purl.fcla.edu/fcla/etd/UFE0025065.
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Shi, Xianming. "High yield production of lutein by Chlorella protothecoides under heterotrophic conditions of growth /." Hong Kong : University of Hong Kong, 1998. http://sunzi.lib.hku.hk/hkuto/record.jsp?B19859880.
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Chuan-Yi, Hsu, and 許筌貽. "High Dividend Yield Investment Strategy." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/81161418287285342827.
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碩士東吳大學
國際經營與貿易學系
102
In this study, we discuss whether a high dividend yield portfolio’s ROI is better than the broader market or Taiwan 50’s ROI or not. The study’s subjects are all listed companies and OTC companies. In this research, we have some findings: First, Taiwan 50 rate of return is better than the market index’s return. Second, the high dividend yield portfolio investment policy is only applicable to listed companies. When add in the OTC companies, the rate of return is significantly reduced. Third, all three high dividend yield portfolio return is significantly better than market index and Taiwan 50’s ROI. Finally, the three kinds of high dividend yield portfolio’s returns have no statistically significant differences.
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Yan-Lin, Ya. "Do High Yield stocks really outperform?" 2006. http://www.cetd.com.tw/ec/thesisdetail.aspx?etdun=U0009-0707200615240300.
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Liu, Pei-Yi, and 劉佩宜. "Asian High Yield Bond Investment Research." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/eb544h.
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碩士健行科技大學
國際企業經營系碩士在職專班
105
The fund evaluation site, MORNINGSTAR, recommended a portfolio of Asian high-yield bond funds composed of the following six funds chosen from those available in Taiwan: Mirae Asset Asia High Income Bond, Nomura Asia Pacific High Yield Bond Fund, HSBC Asian High Yield Bond, UBS (TW) Bond Fund-Asian High Yield, DWS Asia High Yield Bond, and JPMorgan (Taiwan) Asia High Yield Total Return Bond Fund. In January 2014, the US Federal Reserve announced that its QE (or, Quantitative Easing) policy would gradually withdraw, and QE formally withdrew from the market in October, 2014. In December 2015, the United States finally raised its interest rates. Under such environmental conditions, it is worthwhile to examine the investment performance of high-yield bond funds. The research results can be summarized as the following: (A) The average monthly return rate is approximately 0.45%, which is still higher than the interest rate of time deposit. Among the aforementioned six funds, UBS (TW) Bond Fund-Asian High Yield enjoys the highest interest rate for time deposit, and HSBC Asian High Yield Bond is the lowest. (B) The overall average value of risk is 0.5810%. HSBC Asian High Yield Bond is of the lowest rate, and Nomura Asia Pacific High Yield Bond Fund is relatively the highest; in terms of Sharpe Indicator, UBS (TW) Bond Fund-Asian High Yield is the highest, and HSBC Asian High Yield Bond is the lowest; the standard deviation is 1.29%, and HSBC Asian High Yield Bond shows the least standard deviation; Final suggestions are presented as below: For investors pursuing high ROI, they can choose UBS (TW) Bond Fund-Asian High Yield and Nomura Asia Pacific High Yield Bond Fund. Comparatively, investors of these two funds shall take higher risks. For investors pursuing low risks, they can choose Mirae Asset Asia High Income Bond, HSBC Asian High Yield Bond, and JPMorgan (Taiwan) Asia High Yield Total Return Bond Fund. In contrast, the ROI of the tree funds will be relatively lower.
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Lin, Yu-Fan, and 林羽凡. "High Yield Current Sense Amplifier for High Speed Flash Memory." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/23539683433249080719.
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碩士國立清華大學
電機工程學系
99
Non-volatile memory plays an important role to store the code and data in today’s SOC chip. In non-volatile memory, the NOR-type flash memory needs fast and reliable random read access due to the code jumps from one memory location to another in code execution. However, the transistor threshold voltage mismatch is more apparent which makes the poor yield and large speed penalty in the advance nanometer technology. To achieve high speed and high yield purposes, we propose a current sense amplifier with offset compensation schemes. The offset compensation schemes include Precharge PMOS Trimming and Bias Trimming, the Precharge PMOS Trimming reduces the mismatch of precharge current and current mirror; the Bias Trimming reduces the mismatch of current sense amplifier. In proposed trimming, we do the calibration after chip fabrication. And set the optimized trim code to flash memory. Furthermore, we use symmetric array and replica reference scheme in this work. The symmetric array reduce loading mismatch between cell side and reference side for high speed sensing; the replica reference scheme use average reference current technique to decrease the reference current variation due to PVT variation. We design a 90nm CMOS technology within 1Mb SuperFlash memory. The experiment result shows that the random read access time is 3ns at sense amplifier supply voltage is 1.2V. Besides, the proposed offset compensation schemes improve 67% random read speed than without offset compensation. The power consumption is 1.23mW in 30MHz.
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Wu, Chien-sheng, and 吳建昇. "High-Yield Synthesis of BEA Zeolite Nanocrystals." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/99349795719900302458.
Full textAbstract:
碩士國立中央大學
化學工程與材料工程研究所
96
Zeolite BEA, with large pore size of 12-membered ring pore openings, is an industrial important catalyst for the transalkylation of toluene and C9 aromatics to produce xylene. It is also expected that if beta zeolite is made into nanocrystals, the higher external surface area may reduce the diffusion length and make the catalyst more effective. Consequently, the synthesis of beta zeolite nanocrystals has been the objectives of many researches. To synthesize smaller zeolite nanoparticles, one can either increase the ratio of organic-template or reduce the hydrothermal temperature. However, the consequence is longer hydrothermal time and lower zeolite yield. Based on our experience in the synthesis of MFI zeolite, a pre-concentrating step before low temperature hydrothermal seemed to accelerate the formation of crystal nuclei and speed up the crystallization. The objective of this research is to applied the experience on MFI zeolite to beta zeolite system and verify if we can improve the zeolite yield without sacrifice the particle size. 1SiO2:0.04AIP:0.36 TEAOH:25H2O was found to be a better recipe. At first the EtOH was removed to force complete hydrolysis and the zeolite beta precursor would be concentrated to speed up the aggregation. Finally, the precursor was transferred to 90℃ for nucleation and crystallization. The formation of zeolite from precursor and its aggregation and growth was monitored to understand the kinetics, based on which the final zeolite particle size could be controlled. Finally, Beta zeolite nanoparticles with uniform particle size distribution (＜50 nm ) are successfully prepared from zeolite precursor. The yield of centrifugation could be 60 wt%.
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JUNG, YEH SU, and 葉素蓉. "The Momentum of High Yield Bond Funds." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/7txx42.
Full textAbstract:
碩士逢甲大學
金融碩士在職專班
103
After the financial crisis since 2007, owing to the disastrous losses of share investments, therefore the investors turn to favor the Bond Type Funds which are able to increase the return rate of investment target by additional allotment of interests. And, the High-Yield Bond Type Funds with higher interest allotment is especially the most favorite type. The investors even take the ranking of return rate as the buy-in criterion of investment target. Because the High-Yield Bonds were rarely taken as the study sample in plenty of domestic and overseas discussions that taken the kinetic theory of shares as the study basis, therefore this study undertook the investigation on the kinetic effect of the High-Yield Bond Type Funds. This study adopted the t-Test as the methodology for the test of kinetic effect. There are 23 cases of overseas High-Yield Bond Type Funds adopted. Firstly, it compared the returns of winners and losers that were ranked by the monthly or seasonally return rates in the formation periods to observe whether there has any significant difference; and to verify whether the High-Yield Bond Type Funds possess the kinetic effect of “The stronger is always the winner”. Secondly, it conducted the further investigation on the capability of allowing the investors to earn their excess returns by wave-band operation or long-term holding on what kinds of investment strategies. The empirical results has shown that the return rates of winners have not larger than those of losers by the 16 listed results in the 8 kinds of investment combinations which were assisted with the before/after -deducted expenses. On the investment strategies, it always can be through the effective ways of transaction operations to obtain the excess returns; and it is regardless of short-turn or middle-term in the periods. However, the long-term holders recommend to choose the global-type and long-time established High-Yield Bond Funds as the best selective investment targets.
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Giavarini, Carlo, and Filippo Maccioni. "A HIGH YIELD PROCESS FOR HYDRATE FORMATION." 2008. http://hdl.handle.net/2429/2019.
Full textAbstract:
A new procedure was studied to obtain concentrated methane hydrates in bulk, at medium-low pressure,
avoiding the use of the spray process. Methane hydrate was formed at about 5 MPa and 2 °C in a reaction
calorimeter with the volume of two liters. The clathrate concentration was about 30% and the final reactor
pressure was 2.7 MPa. Any further repressurization at 2 °C had no noticeable effect on the hydrate
formation. However, by repressurizing the vessel again to 4 MPa and increasing the temperature near the
decomposition value (about 6° C) more clathrate was formed. Repressurizing again the reactor at 4 MPa
and controlling the temperature at the same level, a concentration of 88% hydrate in the bulk was reached.
Respect to the hydrate produced by the spray process, this procedure takes more time, but it can be sped up
and made continuous by using teo reaction vessels, one for hydrate formation and the other for hydrate
concentration. The advantage is the production of concentrated hydrates, by a simple equipment, working at
relatively low pressures.
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Chen, Shy-Fen, and 陳淑芬. "The Performance of High-Yield Bond Fund." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/60468856514441091266.
Full textAbstract:
碩士國立中央大學
財務金融學系在職專班
104
Sharpe Ratio is the evaluation index of fund portfolio performance for general fund. Since Sharpe (1966) adopted the evaluations of remuneration and risk to estimate the performances of mutual fund, this approach has been broadly discussed and popularly applied to the evaluation of fund performance. Within the trajectory of raising interest rates in US., in the light of the statistics, high-yield bonds were low sensitive to interest rates, the performance would still be relevant stable albeit the interest rates were raising; moreover, as the most attractive bond of all, high-yield bonds were able to render better coupon to investors and make themselves bring into the core investment configuration for long term. The purpose of the research is to examine whether the high-yield bond funds are the optimal subjects for investors. The results ascertain the long-term performances of high-yield bond are worse than the performances of S&P 500 index. To analyze high-yield bond funds and S&P 500 index with Sharpe ratio, the Sharpe ratio of high-yield bond funds is better than the Sharpe ratio of S&P 500 index, and the average remuneration performances of high-yield bond funds are better than the average remuneration performances of the same type of funds and S&P 500 index.
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Wang, Yu-Hsin, and 王裕信. "Evaluating Performance of High Yield Bond Fund." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/91483531814872161010.
Full textAbstract:
碩士南華大學
財務金融學系財務管理碩士班
104
Using the TEJ database of monthly data on global mutual fund with the investment in high yield bond from 2011 to 2015, this thesis empirically evaluates performance of high yield bond funds by focusing on different investment periods and regions. The empirical findings indicate that average returns are 6.828% and shows significant in better performance. Based on the different investment horizons with month, quarter, semi-annual, one year, two year, and three year, the performance is getting better and better with increasing the investment periods. Regarding the investment regions, global finds show best performance with returns of 9.335%, Asian region of 6.900%, emerging region of 4.951%, and Chinese region of 3.351%.
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Huang, Chia-Hsing, and 黃家興. "Housing Loans and High-yield Bond Fund's Divident Rate Spread Investment Strategies – in AllianceBernstein Global High-yield Bond Fund Case." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/q7q225.
Full textAbstract:
碩士輔仁大學
金融與國際企業學系金融碩士在職專班
103
In the past, discussion in high-yield bond fund were focus in performance, the connection of high-yield bond fund price and the interest rate or correlation between bonds of different credit ratings as the main research direction. None for the gap between high yield bond fund yield and housing-loan rates can be an investment opportunities. In Taiwan, the spread between housing loan and high-yield bond funds, if you make a low-interest housing loans to invest in high-yield bond funds in the long term, whether to create a stable cash flow and profitability. In some case have to redemption for repayment mortgage, whether investor face the present value of the investment is insufficient to repay the loan. In this study, we take AllianceBernstein Global High Yield Bond Fund the most well-known high-yield bond fund as an example to us. By taking back testing in different loan conditions, different investment duration, statistic each back testing cash flow and investment value compare to the loans balance in order to study the feasibility of this investment strategy. The empirical results show that in 53 cases of the back-tested data, the cash flow for each period are net inflows. The longer investment period, the higher probability high-yield bond fund value is greater than housing loan-balance and invest in a lower high-yield bond funds NAV, will get higher cash inflow. In terms of empirical shows the investment strategy demands in cash inflows is feasible. The initial investment NAV is the most important factor and also the most sensitive factor. However, the initial investment NAV depends on the market and investment duration can be determined by the investors, so long-term investment is still one of the keys to the success of this investment strategy. This study was an example for a single fund, there are many uncertain factors affect the investment gains and losses. It is only for research reference, not for investment proposed.
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Shen, Chen Chih, and 陳志勝. "The Pricing of High Yield Equity-linked Note." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/67614624175505019949.
Full textAbstract:
碩士東吳大學
財務工程與精算數學系
101
This paper is based on High Yield Equity-Linked Notes(HYELN). This quanto HYELN is composite of multi-asset option, discrete barrier option and look-back option. Therefore,we use Monte Carlo simulation to evaluate bond prices and conduct sensitivity analysis. Our numerical research demonstrated that the value of HYELN is negatively related to the volatility of USD/NTD exchange rate, U.S. dollar risk-free interest rate ,the volatility of underlying stock and credit discount rate. The result is due to Barrier option and look-back option design. But this HYELN is positively related to the NTD risk-free rate. Except the barrier option price in higher or lower situations, as barrier price increases the value of HYELN decreases. Because the note investment period is long, rate factors is a key factor in this HYELN. However, every variable have influence on HYELN. Investors should carefully selecte the issuer and pay attention to rate change . They must understand the linked option types and judgment commodity trends.
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Liu, Yichien, and 劉毅乾. "The Performance Persistence of High Yield Bond Funds." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/24366215482359431430.
Full textAbstract:
碩士輔仁大學
金融與國際企業學系金融碩士班
99
There has been a great amount of research exploring the performance persistence of bond funds, yet very few has a focus on the high yield bond market. This paper employs the methods of Spearman rank-correlation and log-odds ratio to examine the performance persistence of high yield bond funds. The performance measure used in this study includes average returns and Sharpe ratios, and is calculated for both short and long terms. The empirical results indicate that short term bond funds of high yield(for per month or per season) show better persistence under non-distinguished investment region and the method of Spearman rank-correlation while long term(for per half year or per year) show worse persistence.And no matter short or long terms, the performance measure of average returns show worse persistence under the method of Spearman rank-correlation.Both performance measure of average returns and Sharpe ratios(for short qand long terms)show worse persistence under the circumstance of distinguishing investment region.Besides,high yield bond funds show worse persistence(no matter any terms and any performance measures) under log-odds ratio method except the measure of sharp ratios(for per month).
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Tang, Chau-chin, and 湯朝欽. "The Research of High Yield Stock Portfolio Performance." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/98270585223436216984.
Full textAbstract:
碩士南華大學
財務金融學系財務管理碩士班
101
The purpose of this research is to investigate and analize the return rate of high yield stocks based on the 898 over the counter and listed companies data resources from TEJ database during 1911 to 2011.In order to create investment portfolio and find out the return rate,we computed stock yield rate and rank stocks through market value according to stock price on the ex-dividend days.The weighting of investment portfolio can be used by equal way and weighted way.The main contributions of this research would be described as follows: 1.The shortterm investment portfolio return rates in one year are better than five or ten years. 2. According to high yield stocks picking tactics, we draw figure 4-1-20 and figure 4-1-21 ,finding the weighted investment portfolio curves can be effectively reduce the investment risks when the number of companies reaches 20 . 3. Finally, we select the top 50% companies by market value during 2001~2010. Creating investment portfolio by the top 10 high yield rate companies and invest them through compounding way every year continuously. In table 4-2, it shows return rate up to 153.36% by equal way,and 134.14% by weighted way. The Sharpe ratio also indicate the high yield stocks is 0.4268, which is better than the market return rate 0.1098.