3,117 research outputs found
Rapid transformation in a dual identity Defense University
We discuss and examine strategies used to achieve rapid transformation when there are specialized identities within an organization. In this case study we use a grounded theory approach, conducting interviews with individuals representing the various subgroups in the organization two years after a reform initiative was undertaken. Transcripts were thematically analyzed. The findings contributed to the development of a model to depict the effects of a specialized management identity that employs a deletion strategy using coercion to effect rapid transformation. Recommendations are presented for specialized identity change management strategies.Approved for public release; distribution is unlimited
Adult Social Capital and Track Placement of Ethnic Groups in Germany
The dictum that âcontext mattersâ notwithstanding, few researchers have focused on how social capital affects educational outcomes for ethnic groups outside of the United States. Using German Socioeconomic Panel (GSOEP) data, analyses highlight the group-specific effects of parental social capital on track placement among 11â16-year-old German and non-German students. For both groups, parentsâ family ties fail to affect track placement. Parentsâ community ties have mixed effects. Among Germans, parental involvement in sports affects childrenâs tracking positively. Among non-Germans, parental socializing with peers affects track placement negatively, while parental involvement in religion-based community groups and interethnic ties with Germans improve track placement chances. We relate these findings to different strands of social capital theory
Applying psychological type theory to cathedral visitors : a case study of two cathedrals in England and Wales
This study employs Jungian psychological type theory to profile visitors to Chester Cathedral in England and St Davids Cathedral in Wales. Psychological type theory offers a fourfold psychographic segmentation of visitors, distinguishing between introversion and extraversion, sensing and intuition, thinking and feeling, and judging and perceiving. New data provided by 157 visitors to Chester Cathedral (considered alongside previously published data provided by 381 visitors to St Davids Cathedral) demonstrated that these two cathedrals attract more introverts than extraverts, more sensers than intuitives, and more judgers than perceivers, but equal proportions of thinkers and feelers. Comparison with the population norms demonstrated that extraverts and perceivers are significantly under-represented among visitors to these two cathedrals. The implications of these findings are discussed both for maximising the visitor experiences of those already attracted to these cathedrals and for discovering ways of attracting more extraverts and more perceivers to explore these cathedrals
Assignment of the Human and Mouse Prion Protein Genes to Homologous Chromosomes
Purified preparations of scrapie prions contain one major macromolecule, designated prion protein (PrP). Genes encoding PrP are found in normal animals and humans but not within the infectious particles. The PrP gene was assigned to human chromosome 20 and the corresponding mouse chromosome 2 using somatic cell hybrids. In situ hybridization studies mapped the human PrP gene to band 20p12âpter. Our results should lead to studies of genetic loci syntenic with the PrP gene, which may play a role in the pathogenesis of prion diseases or other degenerative neurologic disorders
Cyclooxygenase in biology and disease
Cyclooxygenase (COX), the key enzyme required for the conversion of arachidonic acid to prostaglandins was first identified over 20 years ago. Drugs, like aspirin, that inhibit cyclooxygenase activity have been available to the public for about 100 years. In the past decade, however, more progress has been made in understanding the role of cyclooxygenase enzymes in biology and disease than at any other time in history. Two cyclooxygenase isoforms have been identified and are referred to as COXâ1 and COXâ2. Under many circumstances the COXâ1 enzyme is produced constitutively (i.e., gastric mucosa) whereas COXâ2 is inducible (i.e., sites of inflammation). Here, we summarize the current understanding of the role of cyclooxygenaseâ1 and â2 in different physiological situations and disease processes ranging from inflammation to cancer. We have attempted to include all of the most relevant material in the field, but due to the rapid progress in this area of research we apologize that certain recent findings may have been left out.âDuBois, R. N., Abramson, S. B., Crofford, L., Gupta, R. A., Simon, L. S., van de Putte, L. B. A., Lipsky, P. E. Cyclooxygenase in biology and disease. FASEB J. 12, 1063â1073 (1998)Peer Reviewedhttps://deepblue.lib.umich.edu/bitstream/2027.42/154527/1/fsb2fasebj12121063.pd
Alternative medicines for AIDS in resource-poor settings: Insights from exploratory anthropological studies in Asia and Africa
The emergence of alternative medicines for AIDS in Asia and Africa was discussed at a satellite symposium and the parallel session on alternative and traditional treatments of the AIDSImpact meeting, held in Marseille, in July 2007. These medicines are heterogeneous, both in their presentation and in their geographic and cultural origin. The sessions focused on the role of these medications in selected resource poor settings in Africa and Asia now that access to anti-retroviral therapy is increasing. The aims of the sessions were to (1) identify the actors involved in the diffusion of these alternative medicines for HIV/AIDS, (2) explore uses and forms, and the way these medicines are given legitimacy, (3) reflect on underlying processes of globalisation and cultural differentiation, and (4) define priority questions for future research in this area. This article presents the insights generated at the meeting, illustrated with some findings from the case studies (Uganda, Senegal, Benin, Burkina Faso, China and Indonesia) that were presented. These case studies reveal the wide range of actors who are involved in the marketing and supply of alternative medicines. Regulatory mechanisms are weak. The efficacy claims of alternative medicines often reinforce a biomedical paradigm for HIV/AIDS, and fit with a healthy living ideology promoted by AIDS care programs and support groups. The AIDSImpact session concluded that more interdisciplinary research is needed on the experience of people living with HIV/AIDS with these alternative medicines, and on the ways in which these products interact (or not) with anti-retroviral therapy at pharmacological as well as psychosocial levels
Release from sheep-grazing appears to put some heart back into upland vegetation:A comparison of nutritional properties of plant species in long-term grazing experiments
Rewilding or wilding is a popularised means for enhancing the conservation value of marginal land. In the British uplands, it will involve a reduction, or complete removal, of livestock grazing (sheep), based on the belief that grazing has reduced plant species diversity, the âWet Desertâ hypothesis. The hope is that if livestock is removed, diversity will recover. If true, we hypothesise that the species extirpated/reduced by grazing and then recover on its removal would more nutritious compared to those that persisted. We test this hypothesis at Moor House National Nature Reserve (NorthâPennines), where seven sets of paired plots were established between 1953 and 1967 to compare ungrazed/sheepâgrazed vegetation. Within these plotâpairs, we compared leaf properties of seven focal species that occurred only, or were present in much greater abundance, in the absence of grazing to those of 10 common species that were common in both grazed and ungrazed vegetation. Each sample was analysed for macroânutrients, microânutrients, digestibility, palatability and decomposability. We ranked the species with respect to 22 variables based on effect size derived from Generalised Linear Modelling (GLM) and compared species using a Principal Components Analysis. We also assessed changes in abundance of the focal species through time using GLMs. Our results support the âWet Desertâ hypothesis, that is, that longâterm sheep grazing has selectively removed/reduced species like our focal ones and on recovery, they were more nutritious (macroânutrients, some microânutrients) palatable, digestible and decomposable than common species. Measured changes in abundance of the focal species suggest that their recovery will take 10â20âyears in blanket bog and 60âyears in highâaltitude grasslands. Collectively, these results suggest that sheep grazing has brought about biotic homogenization, and its removal in (re)wilding schemes will reverse this process eventually! The âwhite woolly maggotsâ have eaten at least part of the heart out of the highlands/uplands, and it will take some time for recovery
Observational Study Design in Veterinary Pathology, Part 1: Study Design
Observational studies are the basis for much of our knowledge of veterinary pathology and are highly relevant to the daily practice of pathology. However, recommendations for conducting pathology-based observational studies are not readily available. In part 1 of this series, we offer advice on planning and conducting an observational study with examples from the veterinary pathology literature. Investigators should recognize the importance of creativity, insight, and innovation in devising studies that solve problems and fill important gaps in knowledge. Studies should focus on specific and testable hypotheses, questions, or objectives. The methodology is developed to support these goals. We consider the merits and limitations of different types of analytic and descriptive studies, as well as of prospective vs retrospective enrollment. Investigators should define clear inclusion and exclusion criteria and select adequate numbers of study subjects, including careful selection of the most appropriate controls. Studies of causality must consider the temporal relationships between variables and the advantages of measuring incident cases rather than prevalent cases. Investigators must consider unique aspects of studies based on archived laboratory case material and take particular care to consider and mitigate the potential for selection bias and information bias. We close by discussing approaches to adding value and impact to observational studies. Part 2 of the series focuses on methodology and validation of methods
Substrate and catalyst effects in the enantioselective copper catalysed CâH insertion reactions of α-diazo-ÎČ-oxo sulfones
Excellent enantioselectivities of up to 98% ee are achieved employing the copperâbis(oxazoline)âNaBARF catalyst system in the CâH insertion reactions of αâdiazoâÎČâoxo sulfones. The influence of variation of the bis(oxazoline) ligand, copper salt, additive and substrate on both the efficiency and the enantioselectivities of these intramolecular CâH insertion reactions has been explored. Optimum enantioselectivities are achieved with the phenyl and diphenyl ligands across the substrate series
BERNN: Enhancing classification of Liquid Chromatography Mass Spectrometry data with batch effect removal neural networks
Liquid Chromatography Mass Spectrometry (LC-MS) is a powerful method for profiling complex biological samples. However, batch effects typically arise from differences in sample processing protocols, experimental conditions, and data acquisition techniques, significantly impacting the interpretability of results. Correcting batch effects is crucial for the reproducibility of omics research, but current methods are not optimal for the removal of batch effects without compressing the genuine biological variation under study. We propose a suite of Batch Effect Removal Neural Networks (BERNN) to remove batch effects in large LC-MS experiments, with the goal of maximizing sample classification performance between conditions. More importantly, these models must efficiently generalize in batches not seen during training. A comparison of batch effect correction methods across five diverse datasets demonstrated that BERNN models consistently showed the strongest sample classification performance. However, the model producing the greatest classification improvements did not always perform best in terms of batch effect removal. Finally, we show that the overcorrection of batch effects resulted in the loss of some essential biological variability. These findings highlight the importance of balancing batch effect removal while preserving valuable biological diversity in large-scale LC-MS experiments
- âŠ