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Methods currently used for inventory control in industry are with few exceptions developed more than forty years ago. This is for instance the case with methods like reorder point sys-tems, cover-time planning and material requirements planning (MRP). Lead times at that time were typically several weeks and months and order quantities covered typically de-mand over several months. Since then both
Popular Abstract in Swedish Näthinnan (retina) spelar en central roll för vår förmåga att se. Den sitter längst bak i ögat och precis på samma sätt som objektivet i en kamera fokuserar en bild på filmen, fokuserar ögats "objektiv", dvs. hornhinnan och linsen, en bild på näthinnan. Denna bild, bestående av ljus av olika färg och intensitet, omvandlas av näthinnan till elektriska nervsignaler som skThe main objective of this thesis was to investigate the fate of photoreceptor cells when using different strategies for retinal cell transplantation. Comparing transplantation of fragments of embryonic retina with cell suspensions of the same tissue we found that transplantation of fragments of embryonic retina result in mature transplants with a higher degree of cellular organization than transp
The purpose of this study is to determine whether it is easier to predict the default probability in EU than in the USA or vice versa by analyzing the time period 2006-2009 which is characterized by the financial crisis. We will also establish whether there are any differences in the prediction of default probabilities between non-financial and financial firms. To be able to perform the study, we
Objective This study aimed to explore the potential of in vivo q-space imaging in the differentiation between different cerebral water components. Materials and Methods Diffusion-weighted imaging was performed in six directions with 32 equally spaced q values and a maximum b value of 6600 s/mm2. The shape of the signal-attenuation curve and the displacement propagator were examined and compared
As the amount of high dimensional data becomes increasingly accessible and common, the need for reliable methods to combat problems such as overfitting and multicollinearity increases. Models need to be able to manage large data sets where predictor variables often outnumber the amount of observations. In this study the frequentist and Bayesian framework is tested against each other based on three
1. State space models are starting to replace more simple time series models in analyses of temporal dynamics of populations that are not perfectly censused. By simultaneously modelling both the dynamics and the observations, consistent estimates of population dynamical parameters may be obtained. For many data sets, the distribution of observation errors is unknown and error models typically chos
Evacuation models can be reliably used if they are sufficiently validated for the application in question (e.g. Fire Safety Engineering). To be useful, an evacuation model should therefore be an accurate enough representation of the real-world behaviour of evacuees. The scope of this work was to determine how accurately the model crowd:it (making use of the Optimal Steps Model) provides a represen
This paper presents a structured methodology for the constrained multi-objective optimization (MO) of a continuous cross-flow atomic layer deposition (ALD) reactor model with temporal precursor pulsing. The process model has been elaborated and experimentally validated in the first two papers of this series (33 and 34). A general constrained MO problem (MOP) was formulated to simultaneously optimi
Strength in Numbers 2024 | LESSONS FROM WRITING A MASTER’S THESIS AS A TEAM Forming a Band • Early introduction seemed to suggest three authors possible. • Started planning together as a team. • We wanted to do something innovative and large-scale. • Later lectures made no mention of trios. Only singles or pairs. • “Explain why two people is not enough” Teacher Education Coordinator • One month la
https://www.uvet.lu.se/fileadmin/user_upload/uvet/lararutbildning/powerpoint/skal_2024_Simon__Robert__Anton.pdf - 2026-09-26
Det finns ett behov av frågeformulär som dimensionellt mäter psykiskt fungerande hos ungdomar. Den korta versionen av Extended Strengths and Weaknesses Assessment of Normal Behavior (E-SWAN-G) är designat för att mäta centrala förmågor längs kontinuum från stora svårigheter till stora styrkor. Syftet med denna studie var att genomföra en initial psykometrisk utvärdering av E-SWAN-G kortversion medThere is a need for questionnaires that dimensionally assess psychological functioning in adolescents. The short version of the Extended Strengths and Weaknesses Assessment of Normal Behavior (E-SWAN-G) is designed to assess core abilities along continua from severe weaknesses to great strengths. The aim of this study was to conduct an initial psychometric evaluation of the E-SWAN-G short version
The value of bone mineral density (BMD) measurements to stratify fracture probability can be enhanced in a case-finding strategy that combines BMD measurement with independent clinical risk indicators. Putative risk indicators include age and gender, BMI or weight, prior fracture, the use of corticosteroids, and possibly others. The aim of the present study was to develop a mathematical framework
Calculations of the significance of results from linkage analysis can be performed by simulation or by theoretical approximation, with or without the assumption of perfect marker information. Here we concentrate on theoretical approximation. Our starting point is the asymptotic approximation formula presented by Lander and Kruglyak (1995, Nature Genetics, 11, 241-247), incorporating the effect of
Late Svecofennian granite is frequent in the Bothnian Basin, especially in zones of rapidly changing metamorphic grade but also in areas, where the metamorphic grade is elevated. The granite is essentially undeformed, but weakly foliated or lineated rocks are common; more rarely are rocks strongly foliated. X-ray fluorescence was used for major-element and ICP-MS for trace-element analyses. The ch
A defect in proprioception has been found in selected patient groups that have an anterior cruciate ligament deficient knee at different times after the original injury. The time of development and the extent of such defects were studied longitudinally on 16 consecutive patients. During the first year after a primary knee injury, which included a complete rupture of the anterior cruciate ligament,
Plasma metabolomics holds potential for precision medicine, but limited information is available to compare the performance of such methods across multiple cohorts. We compared plasma metabolite profiles after an overnight fast in 11,309 participants of five population-based Swedish cohorts (50–80 years, 52% women). Metabolite profiles were uniformly generated at a core laboratory (Metabolon Inc.)
