Thales Akira Matsumoto Ricarte

The Logistic Positive Exponent (LPE) model from Item Response Theory (IRT) and the Multistage Adaptive Testing (MST) using this model are the focus of this dissertation. For the LPE, item parameter estimations efficiency was studied, it was also analyzed the latent trait estimation for different response patterns to verify the effects it has on guessing and accidental mistakes. The LPE was put in contrast to Rasch, 2 and 3 parameter logistic models to compare the its efficiency. The item paramet...

Altemir da Silva Braga

In this study we propose three new distributions and a study with longitudinal data. The first was the Odd log-logistic normal distribution: theory and applications in analysis of experiments, the second was Odd log-logistic t Student: theory and applications, the third was the Odd log-logistic skew normal: the new distribution skew-bimodal with applications in analysis of experiments and the fourth regression model with random effect of the Odd log-logistic skew normal distribution: an applicat...

Sampay-Hawkins, Keicia Annette

<p>To what degree is family structure correlated with the educational attainment of African American males? African American males have consistently low educational attainment levels and are removed from the educational environment more than any other group of students enrolled in public schools. This study examines the impact of family structure on the educational attainment levels of African American males, controlling for parental levels of education, social class, and income. African America...

Zong-Yu Lai, 賴宗昱

碩士 / 國立勤益科技大學 / 資訊工程系 / 102 / As technology advanced rapidly in recent history, the upgrades from old equipment to new equipment might cause the information incompatibility among different systems, and create difficulties in the management and maintenance during supplies. Especially for the equipment systems during intra-department supplies, as the supplies are often not just across different departments but also different brands made in different eras. Since the equipment systems are limited ...

Karásek, Jan

Disertační práce je zaměřena na optimalizaci průběhu pracovních operací v logistických skladech a distribučních centrech. Hlavním cílem je optimalizovat procesy plánování, rozvrhování a odbavování. Jelikož jde o problém patřící do třídy složitosti NP-težký, je výpočetně velmi náročné nalézt optimální řešení. Motivací pro řešení této práce je vyplnění pomyslné mezery mezi metodami zkoumanými na vědecké a akademické půdě a metodami používanými v produkčních komerčních prostředích. Jádro optimaliza...

Hendi, Hayder

Le domaine de la logistique implique souvent la résolution de problèmes combinatoires complexes. Ces derniers font également implicitement référence à des processus, acteurs, activités et méthodes concernant divers aspects qu'il faut considérer. Ainsi, un même problème peut faire intervenir des processus de vente/achat, transport/livraison et gestion de stock. Ces processus sont tellement divers et interconnectés qu'il est difficile pour un logisticien de tous les maîtriser. Dans cette thèse, no...

Alic, Almedina, Emilsson, Caroline

I detta arbete undersöks hur bra prediktionsförmåga som uppnås då multinomial och ordinal logistisk regression tillämpas för att modellera respektive utfall 1X2 i fotbollsmatcher. De två modellerna har använts i jämförande syfte, där den multinomiala logistiska modellen behandlar utfallen som nominala och den ordinala behandlar dem som ordnade, 1 > X > 2. Matchens utfall påverkas av kvantitativa förklaringsvariabler, baserade på data från Premier League 2015/206, som beskriver lagens form och pr...

Lund, Anton

This thesis has investigated two-stage regularized logistic regressions applied on the credit scoring problem. Credit scoring refers to the practice of estimating the probability that a customer will default if given credit. The data was supplied by Klarna AB, and contains a larger number of observations than many other research papers on credit scoring. In this thesis, a two-stage regression refers to two staged regressions were the some kind of information from the first regression is used in ...

Hardin, Patrik, Tabari, Sam

This bachelor thesis within mathematical statistics studies the possibility of modelling the renewal probability for commercial non-life insurance policyholders. The project was carried out in collaboration with the non-life insurance company If P&amp;C Insurance Ltd. at their headquarters in Stockholm, Sweden. The paper includes an introduction to underlying concepts within insurance and mathematics and a detailed review of the analytical process followed by a discussion and conclusions. The fi...

Yang, Hongjun,

Thesis (Ph.D.)--Auburn University, 2007. / Abstract. Vita. Includes bibliographic references (ℓ. 280-297)

Atar, Burcu,

Thesis (Ph. D.)--Florida State University, 2007. / Advisor: Akihito Kamata, Florida State University, College of Education, Dept. of Educational Psychology and Learning Systems. Title and description from dissertation home page (viewed May 20, 2008). Document formatted into pages; contains xi, 246 pages. Includes bibliographical references.

Cummins, Lane. Wilborn, Tony.

"Submitted in partial fulfillment of the requirements for the degree of Master of Business Administration from the Naval Postgraduate School, December 2009." / Advisor(s): Franck, Raymond E. ; Hildebrandt, Gregory. "December 2009." "MBA Professional report"--Cover. Description based on title screen as viewed on January 27, 2010. Author(s) subject terms: Cost-benefit Analysis, C-9B Skytrain, C-40A Clipper, NUFEA, Fleet Logistic Support Wing, Acquisition. Includes bibliographical references (p. 8...

Eddy, Rachel.

Thesis (M.S.)--Kansas State University, 2009. / Title from electronic thesis title page. Includes bibliographical references.

Mokgalabone, M.S.

Thesis (M.Sc (Agricultural Economics)) --University of Limpopo, 2015 / Agriculture plays an important role in uplifting the economy of South Africa. Small-scale farmers in rural areas are linked with poverty and operate inefficiently due to over or under utilization of some of the factors of production. This study aimed at analysing the technical and allocative efficiency of small-scale maize farmers in Tzaneen municipality. The objectives of the study were: (i) To assess the level of technical...

Söderlind, Jonas, Johansson, Nina

In the late 90s coconut farms in Mozambique were affected by a disease that made the coconut trees drop their leaves and die, the disease is called the coconut lethal yellowing disease (CLYD). It is known that planthoppers are spreading the disease. This thesis investigates if cultivation and farm related factors could have an impact on the risk of being infected by CLYD. With a sample of 534 farms from the two provinces Zambeze and Nampula a logistic regression model is estimated. The result sh...

Håkansson, Cecilia, Ihrström, Nicitha

Sammanfattning Detta examensarbete är en studie av logistikrutiner på en byggarbetsplats hos byggföretaget Peab. Rutiner och dokument har en stor roll i vardagen på en byggarbetsplats. Ett stort problem är tidsbrist som oftast uppstår p.g.a. att rutiner och dokument inte använts. Tidsbristen i sig gör att de inte har tid att följa rutiner och dokument. Det är en ond cirkel där de följer varandra. Valda rutiner och dokument undersöks och dessa frågeställningar kommer att besvaras: Används rutiner...

Urbanovich, Ernest

The goal of the project was to use the data in the Workers' Compensation Board (WCB) of British Columbia's data warehouse to develop a statistical model that could predict on an ongoing basis those short-term disability (STD) claims that posed a potential high financial risk to the WCB. We were especially interested in identifying factors that could be used to model the transition process of claims from the STD stratum to the vocational rehabilitation (VR) and long term disability (LTD) str...

Gulyás, Gyula

The purpose of this research project was to develop a procedure for terrain stability assessment by applying case-control sampling and multiple logistic regression analysis, widely used statistical techniques in biomedical research and in epidemiology. The idea of applying statistical methods used in epidemiology to terrain stability assessment was based on the observation that landslides, like some diseases, are rare phenomena. The implementation of a terrain stability assessment based on...

Ullberg, Valentina

In recent years the competition in the manufacturing sector has continually grown stronger. Globalization and increasingly demanding customers have lead to new and bigger challenges for the manufacturing companies. Therefore efficient planning and control systems have become even more important. The so-called PPC system (production planning and controlling system) has become an essential part of the success of a production company. It needs to allow for transparency when planning and controlling...

Kolísko, Jiří

The main objective of our research was to develop a new bankruptcy prediction model for the Czech economy. For that purpose we used the logistic regression and 150,000 financial statements collected for the 2002-2016 period. We defined 41 explanatory variables (25 financial ratios and 16 dummy variables) and used Bayesian model averaging to select the best set of explanatory variables. The resulting model has been estimated for three prediction horizons: one, two, and three years before bankrupt...

Chih-Wei Kuan, 管志偉

碩士 / 國立中興大學 / 資訊科學與工程學系 / 103 / Image enhancement methods are proposed to effectively improve or enhance images to provide new images with better perception for human viewers or advanced computer processing tasks. Therefore, the enhanced images are more suitable than the original images for a specific application. There existing two common deficiencies in traditional image enhancement methods. One is the loss of local contrast and another is the loss of details. In addition, many methods generat...

Peng, Shu-Zhen, 彭淑珍

碩士 / 國立交通大學 / 統計研究所 / 83 /

Elchert, Daniel Matthew

Many high school students who want to attend college never actually enroll. Multiple factors like barriers (e.g., financial, discrimination) and poor academic achievement prevent some high school students from matriculating to college. Researchers must form a nuanced understanding of multidimensional factors that predict college enrollment. The purpose of this dissertation is to investigate the extent to which psychosocial academic behavioral skills (PABS) predict college enrollment in two and f...

Oates, Krystle S.

College decisions are often the result of a variety of influences related to student background characteristics, academic characteristics, college preferences and college aspirations. College counselors recommend that students choose a variety of schools, especially schools where the general student body matches the academic achievement of students. These types of schools are generally referred to as match schools. T...

Ondrová, Lucie

Diplomová práce pojednává o stabilizaci diskrétního logistického modelu pomocí několika řídících metod. Je zde provedena především stabilizace rovnováh, 2-periodických cyklů a 3-periodických cyklů. Ke stabilizaci systému je využito proporčního zpětně-vazebního řízení, zpětně-vazebního řízení s časovým zpožděním a řízení založeného na predikci. U každé metody je diskutovaná stabilizační množina pro řídící zesilovač spolu s oblastmi stability pro odpovídající kontrolovaná řešení. Všechny teoretick...

Liliana Patrícia Pinto Leite

No description available.

Berglund, Josefin, Nordqvist, Elin

Consumer shopping preferences has changed in today’s society. E-commerce is rapidlygrowing and the turnover for physical stores is effected negatively. A segment that hashad an upswing in recent years is the warehouse and logistic property market. Thechange in consumer behavior requires property owners to adapt to the development indemand from their tenants. Furthermore, e-retailers must adapt to how they managethe warehouse and logistic operations. The thesis investigates the development of the...

Zhang, Jiaqi

No description available.

Dingerson, Lynne M.

The lower Chesapeake Bay and adjacent coastal waters serve as the primary summer nursery areas for juvenile sandbar sharks (Carcharhinus plumbeus) in the Northwest Atlantic Ocean. The large population of juvenile sandbar sharks in this ecosystem benefits from increased food availability that fuels rapid growth and from limited exposure to large shark predators. Juvenile growth and survival is the most critical life history stage for sandbar sharks, and juvenile nursery grounds will continue to p...

Hierarchical models seek to explain relations between individual level and aggregate level data. A new method of analysis for hierarchical data in which the outcome variable is dichotomous has been developed (Pullum, 1991). This method partitions the variance into a within-cluster component and a between-cluster component, and then uses logistic regression models to explain the variance in the two components in a unified equation The question arises as to how the number of contexts and the numbe...

Measles is a serious infectious disease, with a global annual burden of approximately 30 million cases and about a million deaths. The vast majority of this burden falls on Africa. An effective vaccine has been available for over fifty years, but the coverage of measles immunization in Africa lags behind the rest of the world. Due to weaknesses in the World Health Organization's cluster sampling surveys of immunization coverage, determinants are best gleaned from national sample surveys, such as...

Many cluster-randomized designs aim at comparing the proportions of individuals in different intervention groups who have a specified characteristic, such as developing a disease by a fixed point in time. This experimental design requires a methodology to compare two groups of proportions in the presence of clustering. Among the methodologies to analyze this experimental design, the Logistic-Normal Likelihood Ratio test (LNLR test) stands out in the literature for two reasons: (a) its potential ...

A multilevel logistic regression approach provides an attractive and practical alternative for the study of Differential Item Functioning (DIF). It is not only useful for identifying items with DIF but also for explaining the presence of DIF. Kamata and Binici (2003) first attempted to identify group unit characteristic variables explaining the variation of DIF by using hierarchical generalized linear models. Their models were implemented by the HLM-5 software, which uses the penalized or predic...

The current study examined the impact of unbalanced sample sizes between focal and reference groups on the Type I error rates and DIF detection rates (power) of five DIF procedures (MH, LR, general IRTLR, IRTLR-b, and SIBTEST). Five simulation factors were used in this study. Four factors were for generating simulation data and they were sample size, DIF magnitude, group mean ability difference (impact), and the studied item difficulty. The fifth factor was the DIF met...

The efforts addressed in this thesis refer to applying nonlinear risk predictive techniques based on logistic regression to medical diagnostic test data. This study is motivated and pursued to address the following: 1. To extend logistic regression model of biostatistics to medical informatics 2. Computational preemptive and predictive testing to determine the probability of occurrence (p) of an event by fitting a data set to a (logit function) logistic curve: Finding upper and lower bounds on p...

Khademi Kord, Hamed, Pazirandeh, Ali

The basic problem that this thesis addresses was to compare different packaging materials for Volvo Logistics Corporation (VLC) from a cost perspective. Since this thesis was conducted for VLC only, their main packaging solutions were defined and categorized by size. With this, various materials in each size category were studied, analyzed and compared from different aspects. These aspects ranged from volume efficiency to ergonomics and cleanliness. Some of these aspects were easy to quantify an...

Swart, Alexander Daniël

A research report submitted to the Faculty of Engineering and the Built Environment, University of the Witwatersrand, Johannesburg, in partial fulfilment of the requirements for the Degree of Master of Science in Engineering, October 2015 / A single case study of a major third party logistics provider (3PL) in South Africa was completed for this research. A total of four warehouses, including 43 workers partook in the study. The primary objective of this research was to determine how well empl...

Chidumwa, Glory

A research report submitted to the Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, in partial fulfillment of the requirements for the degree of Master of Science in Epidemiology in the field of Biostatistics. November 2017. / Background People living with HIV/AIDS (PLWHA) are at higher risk of depression compared to HIV uninfected individuals. In addition to pharmacological treatments for depression among PLWHA, psychosocial interventions may facilitate coping with d...

Paolino, Jon-Paul Noel

Item response theory (IRT) models are a conventional tool for analyzing both small scale and large scale educational data sets, and they are also used for the development of high-stakes tests such as the Scholastic Aptitude Test (SAT) and the Graduate Record Exam (GRE). When estimating these models it is imperative that the data set includes many more examinees than items, which is a similar requirement in regression modeling where many more observations than variables are needed. If this requir...

Welch, Catherine E.

<p> The State of Vermont has long had one of the highest high school graduation rates in New England, hovering around 87.8% with a lagging college enrollment rate of 52.3% at any 2- or 4-year postsecondary institution in the country (New England Secondary School Consortium, 2015). This research explored the factors that have the greatest effect on the college enrollment patterns of Vermont high school graduates. Specifically, this study explored the relationship between the following factors and...

Wilson, Ann Wells, 1962-

A computer simulation study was conducted to determine the feasibility of using logistic regression procedures to detect nonuniform differential item functioning (DIF) in polytomous items. A simulated test of 25 items was generated, of which the 25th item contained nonuniform DIF. The degree of nonuniform DIF in the 25th item was varied in four ways. Item scores were generated using Muraki's generalized partial credit model and the data were artificially dichotomized in three different ways for ...

Mota, Stephen Kopano

Thesis (MBA)--Stellenbosch University, 2001 / ENGLISH ABSTRACT: The subject of prediction of business failure from an academic point of view dates back to the turn of the century with the development of a single ratio, the current ratio, as an evaluation of credit-worthiness. Subsequently studies conducted have become complex using different statistical techniques and more than one variable to predict failure. The challenge in these studies has been to establish a reliable model to predict ...

Lourens, Tobie

Thesis (MScEng (Industrial Engineering))--University of Stellenbosch, 2005. / This thesis introduces an adaptation of the Population-Based Incremental Learning (PBIL) meta-heuristic implemented on a variant of the General Pickup and Delivery Problem. The mapping of the customers in the problem and the vehicle routes on a time grid enables the utilization of the powerful genetic search that the PBIL algorithm provides in liaison with competitive learning. The problem consists of a number of c...

Botha, Andre

In an ever-changing world where economic growth is inter-alia dependent on the export of bulk minerals, the risk and the severity of risk incidences in the bulk mineral supply chain should be minimised. In South Africa the export of coal is a large contributor to the GDP and any risk to this supply chain will directly affect its contribution to the GDP. Although all the stakeholders in the bulk coal export logistic chain manage the risk in their own domain, the bulk export logistic cha...

Muchabaiwa, Honest

This thesis investigates the factors that are associated with annual changes in the share price of Johannesburg Stock Exchange (JSE) listed companies. In this study, an increase in value of a share is when the share price of a company goes up by the end of the financial year as compared to the previous year. Secondary data that was sourced from McGregor BFA website was used. The data was from 2004 up to 2011. Deciding which share to buy is the biggest challenge faced by both investment companie...

Rivera Agudelo, Juan Carlos

Les problèmes de tournées de véhicules cumulatives avec capacité (CCVRP) sont étudiés dans cette thèse, où la minimisation de la somme des temps d'arrivée reflète mieux les objectifs stratégiques de la logistique humanitaire.Dans le problème de multiples tournées d’un véhicule cumulatif avec capacité (mt-CCSVRP), un seul véhicule est disponible et il peut effectuer plusieurs voyages. Un algorithme du plus court chemin avec contrainte de ressources est proposé pour résoudre ce problème, dans lequ...

Rippon, Marion Magdelyn

Senior management positions at a South African-based logistics company Logistic (Pty) Ltd (pseudonym) are predominantly occupied by males which led to the primary question: why are females not better represented at senior levels within the organisation and why do promotion into these senior managerial positions appears difficult? The objective of this study was to determine factors impacting female advancement and to develop strategies based on identified influencing factors. Based on an interpr...

SPLETTSTÖSSER, ANIKA

This thesis is part of a study to prove the feasibility of the logistics and production concept of a new production plant built by the business unit Building Infrastructure of the multicorporate enterprise Siemens in Zug, Switzerland. In order to perform this analysis the model of the factory built in the discrete-event simulation tool “Tecnomatix Plant Simulation” is used. Prior student works aimed at answering the question whether the internal logistics should be performed by a milkrun or a fl...

Rusch, Thomas, Hornik, Kurt, Janko, Wolfgang, Lee, Ilro, Zeileis, Achim

No description available.

Kinard, Mary E.

Two procedures for detection of differential item functioning (DIF) for polytomous items were generalized to detection of differential testlet functioning (DTLF). The methods compared were the logistic discriminant function analysis procedure for uniform and non-uniform DTLF (LDFA-U and LDFA-N), and the Mantel score test procedure. Further analysis included comparison of results of DTLF analysis using the Mantel procedure with DIF analysis of individual testlet items using the Mantel-Haenszel (M...