Sampson distance based joint estimation of multiple homographies with uncalibrated cameras

Abstract not availableZygmunt L. Szpak, Wojciech Chojnacki, Anders Eriksson, Anton van den Henge

Maple tools for modified quaternionic analysis

Since 1992 H. Leutwiler, S. L. Eriksson and others developed in a number of papers a modified Clifford analysis and, particularly, a modified quaternionic analysis. The modification mainly consists in considering generalized Cauchy-Riemann equations with respect to a hyperbolic metric in a half space. The aim of this paper is to show how through a change of the basic combinatorial relations used in the modified quaternionic analysis a special Maplesoftware that has been developed for the case of the Euclidean metric can directly be used for numerical calculations in the modified theory.Fundação para a Ciência e a Tecnologia (FCT

Water intake by shelter cats

Cats have trouble using essential resources when put in an unfamiliar and stressful environment. This can affect their water intake and make them suffer from dehydration. In the long run this can lead to a number of diseases such as bladder issues, heart disease, or kidney failure. In addition to this, many cats do find themselves in shelters due to their low status in society. In order to investigate this in shelters for cats, three different kinds of shelters were chosen to measure their cats water intake for seven days and nights. The three different shelters were one ordinary cat shelter, one cat café with homeless cats available for adoption, and one foster home. They all measured the water intake of their cats, the placement and kind of water bowl was considered. The results show that the cats in general drink less water than the stated recommendations. Some drink more water during the day compared to the night, some do not. It is also suggested that they prefer not to drink water in close proximity to their feeding bowl or litter box and further suggested that they prefer to drink water from a running source. The reason for cats to drink less water than the stated recommendations is mostly because of stress and bad welfare, and perhaps that the recommendations are somewhat overstated. In order for cats in cat shelters in Sweden to not suffer from dehydration and the risks that include, people in charge need to understand the cats’ behavior better and guide them into drinking more. Little to no research is available on dehydration in sheltered cats, therefore, no statement can be done on how dangerous this is for the individual cats in the study. However, more research will help better understand their needs and guide human personal how to better care for their cats

Municipal Torts: The Rule Is Liability—The Exception Is Immunity

Enghauser Manufacturing Co. v. Eriksson Engineering Ltd., 6 Ohio St. 3d 31, 451 N.E.2d 228 (1983)

Framgångsfaktorer för virkesköpare

Ett ökat behov för de svenska skogsindustriföretagen på skogsråvara har skapat en stor konkurrens bland skogsföretagen att få köpa virke från de privata skogsägarna. Denna stora konkurrens innebär att virkesköparna på skogsföretagen får en allt viktigare roll i att behålla och utöka sitt företags marknadsandelar på den privata skogsägarmarknaden. Syftet med denna studie var att undersöka vilka egenskaper som ledde till framgång för virkesköpare. Men även att undersöka om det fanns någon skillnad på vad som ledde till framgång beroende på erfarenheten hos virkesköparen samt beroende på i vilken region virkesköparen arbetade. En enkät utformades i syfte att samla in data från virkesköparna om deras egenskaper och arbetssätt. Enkäten skickades ut till alla 83 virkesköpare som arbetade på Holmen. 56 stycken svarade vilket gav en svarsfrekvens på 67%. Datan användes sedan för multivariata dataanalyser så som PCA, OPLS-DA och OPLS analyser. I analyserna jämfördes de framgångsrika virkesköparna mot de ej framgångsrika. Virkesköparna delades upp i grupper efter erfarenhet och var i Sverige de arbetade. Egenskaper som ledde till framgång kunde med hjälp av analyserna identifieras. Även skillnader på vad som ledde till framgång beroende på virkesköparens erfarenhet identifierades. Vissa regionala skillnader kunde dessutom identifieras. De egenskaper som visade sig ha störst betydelse för virkesköparnas framgång var virkesköparens förmåga att sätta upp egna höga mål, att känna att det är viktigt att klara sin budget samt att tycka att det finns en viss tävlan mot sina kollegor.An increased need of timber in the Swedish forest industry has created big competition among forest companies to buy timber from the private forest owners. This competition means that timber purchasers at the forest companies has an increasingly important role in maintaining and expanding their company's market shares timber from the private forest owners. The purpose of this study is to investigate the characteristics that led to success for timber purchasers. But also, to investigate whether there was any difference in what led to success depending on the experience of the timber buyer but also if there are a difference what led to success on depending on in which region the timber buyer is working. A survey was designed in order to collect data from timber purchasers about their characteristics and working methods. The survey was sent out to all 83 timber purchasers who worked at Holmen. 56 answered, which gave a response rate of 67%. The data was then used for multivariate data analyzes such as PCA, OPLS-DA and OPLS analyzes. In the analyzes, the successful timber purchasers were compared with the unsuccessful ones. The timber purchasers were divided into groups according to experience and where in Sweden they worked. Characteristics that led to success could be identified in the analyzes. Differences in what led to success depending on the timber buyer's experience were also identified. In addition, some regional differences could be identified. The qualities that proved to be most important for the timber purchaser’s success were, among other things, the timber buyer's ability to set his own high goals, to feel that it is important to manage the budget and to think that there is a certain competition against the colleagues

Deletion of L-Selectin Increases Atherosclerosis Development in ApoE−/− Mice

Atherosclerosis is an inflammatory disease characterized by accumulation of leukocytes in the arterial intima. Members of the selectin family of adhesion molecules are important mediators of leukocyte extravasation. However, it is unclear whether L-selectin (L-sel) is involved in the pathogenesis of atherosclerosis. In the present study, mice deficient in L-selectin (L-sel−/−) animals were crossed with mice lacking Apolipoprotein E (ApoE−/−). The development of atherosclerosis was analyzed in double-knockout ApoE/L-sel (ApoE−/− L-sel−/−) mice and the corresponding ApoE−/− controls fed either a normal or a high cholesterol diet (HCD). After 6 weeks of HCD, aortic lesions were increased two-fold in ApoE−/− L-sel−/− mice as compared to ApoE−/− controls (2.46%±0.54% vs 1.28%±0.24% of total aortic area; p<0.05). Formation of atherosclerotic lesions was also enhanced in 6-month-old ApoE−/− L-sel−/− animals fed a normal diet (10.45%±2.58% vs 1.87%±0.37%; p<0.05). In contrast, after 12 weeks of HCD, there was no difference in atheroma formation between ApoE−/− L-sel−/− and ApoE−/− mice. Serum cholesterol levels remained unchanged by L-sel deletion. Atherosclerotic plaques did not exhibit any differences in cellular composition assessed by immunohistochemistry for CD68, CD3, CD4, and CD8 in ApoE−/− L-sel−/− as compared to ApoE−/− mice. Leukocyte rolling on lesions in the aorta was similar in ApoE−/− L-sel−/− and ApoE−/− animals. ApoE−/− L-sel−/− mice exhibited reduced size and cellularity of peripheral lymph nodes, increased size of spleen, and increased number of peripheral lymphocytes as compared to ApoE−/− controls. These data indicate that L-sel does not promote atherosclerotic lesion formation and suggest that it rather protects from early atherosclerosis

The Evaluation of Mefloquine Drug Repurposing on Acute Myeloid Leukemia

The aim of this study is to observe cell proliferation, cell viability, apoptosis, and autophagy on acute myeloid leukemia (AML) cell lines, NB4 and U937, with the drug repurposing of mefloquine (MQ). Methods such as the 3-(4,5-Dimethylthiazol-2-Yl)-2,5-Diphenyltetrazolium Bromide (MTT) assay and trypan blue staining have shown a decrease in live cells with high concentrations of mefloquine. Using their average perspective IC50 values of MQ concentration, Western blotting was applied by means of apoptosis and autophagy markers to determine if the induction of apoptosis and inhibition of autophagy was present in MQ-treated AML cells. The experiment will be continued with more cell lines, drugs, and other means of protocol in order to contribute to cancer therapy.https://scholarscompass.vcu.edu/uresposters/1285/thumbnail.jp

Toric ideals of homogeneous phylogenetic models

We consider the phylogenetic tree model in which every node of the tree is observed and binary and the transitions are given by the same matrix on each edge of the tree. We are able to compute the Grobner basis and Markov basis of the toric ideal of invariants for trees with up to 11 nodes. These are perhaps the first non-trivial Grobner bases calculations in 2^11 indeterminates. We conjecture that there is a quadratic Grobner basis for binary trees. Finally, we give a explicit description of the polytope associated to this toric ideal for an infinite family of binary trees and conjecture that there is a universal bound on the number of vertices of this polytope for binary trees.Comment: 6 pages, 17 figure