3,621 research outputs found
After Eden: facing the challenge of gender relations
Reviewed Book: Van Leeuwen, Mary Stewart. After Eden: facing the challenge of gender relations. Grand Rapids: Eerdmans; Carlisle, Eng: Paternoster Press, 1993
Multispectral analysis of ERTS imagery by color enhancement
The Earth Resources Technology Satellite (ERTS) program has supplied the scientist with high resolution multispectral imagery of a large portion or the earth. Photographic and electronic methods of image enhancement are not universally available to those who might profit from such endeavors.
Diazo products were found to be satisfactory for creation of false color enhancement of ERTS multispectral data. The purpose of the enhancement was to make the Diazochrome composite comparable to more sophisticated methods for the purpose of interpretation. The basis of the enhancement was the standard false color infrared composite, with negative and positive Diazochrome masks to enhance selected terrain features.
Major advantages of the enhancement were 1) color renditions were similar to those found on a false color infrared composite, 2) the enhancement process was repeatable, 3) the greater contrast between terrain objects improved interpretation. Interpretability of the enhancement was shown to be restricted by the small scale of the ERTS imagery.
Processing of Diazochrome is simple and requires no darkroom. The high contrast, inherent with the Diazochrome film are not suited for continuous tone reproduction without use ot· some enhancement technique --Abstract, page ii
Structure of 1-(3-butynyl)pyridinium p-toluenesulfonate
The 1-(3-butynyl)pyridinium p-toluenesulfonate salt,
C9H10N+.CTHTO3S -, contains a C--H...O hydrogen
bond between the acetylenic H atom of the cation and a
sulfonate O atom of the anion in the solid state [C...O
3.32 (1), H...O 2.49 A, C--H...O 159°]. The X-ray analysis
was complicated by disorder in both the cation and
anion. A major (85%) and a minor (15%) component of
the 1-(3-butynyl)pyridinium cation are present, both occuping
the same volume element in the lattice. The methyl
H atoms and sulfonate O atoms of the p-toluenesulfonate
anion are disordered over two orientations
Pennsylvania\u27s Family Caregiver Support Program: A Demonstration Project
The physical, emotional, and economic burdens of family caregiving can present a serious threat to the stability and continuity of a caregiving situation. Public policymakers, aware of the high costs of replacing such voluntary efforts with publicly funded institutional care, are becoming more and more concerned about the needs of caregivers and possible intervention strategies to meet those needs.
This article begins with a description of Pennsylvania\u27s new policy initiative for caregivers, the Family Caregiver Support Program (FCSP). Following is a discussion of the evaluation of the program\u27s demonstration phase by the Human Organization Science Institute of Villanova University. The evaluation concluded that the FCSP has a significant positive impact on the lives and abilities of caregivers, including the reduction of caregiver stress and burden. The concluding summary of program results seeks to sharpen the reader\u27s interest in the potential benefits of an intervention strategy such as this and suggests a need for additional research for the benefit of those concerned about health care cost containment
A Scoping Review of Injuries in Amateur and Professional Men\u27s Ice Hockey.
Background: Orthopaedic injuries are common in ice hockey at all levels and can result in physical and psychological adverse effects on these athletes.
Purpose: Primarily, to summarize published data on orthopaedic hockey injuries at the junior through professional level. Secondarily, to characterize the literature based on anatomic site injured, return-to-play rates, cause/mechanism of injury, time lost, and treatments used.
Study Design: Scoping review; Level of evidence, 4.
Methods: PubMed, EMBASE, Cochrane library, and SCOPUS were searched using the terms hockey and injuries using PRISMA (Preferred Reporting Items for Systematic Reviews and Meta-Analyses) guidelines, and 4163 studies involving orthopaedic injuries were identified. Our inclusion criteria consisted of accessible full-text articles that evaluated orthopaedic injuries in men\u27s ice hockey athletes of all levels. We excluded case reports and articles evaluating women\u27s ice hockey injuries, as well as those evaluating nonorthopaedic injuries, such as concussions; traumatic brain injuries; and facial, dental, and vascular injuries, among others. Studies were divided based on level of play and anatomic site of injury. Level of evidence, year published, country of corresponding author, method of data collection, incidence of injury per athlete-exposure, and time lost were extracted from each article.
Results: A total of 92 articles met the inclusion criteria and were performed between 1975 and 2020, with the majority published between 2015 and 2020. These were divided into 8 anatomic sites: nonanatomic-specific (37%), intra-articular hip (20.7%), shoulder (9.8%), knee (8.7%), trunk/pelvis (7.6%), spine (7.6%), foot/ankle (6.5%), and hand/wrist (2.2%). Of these studies, 71% were level 4 evidence. Data were obtained mostly via surveillance programs and searches of publicly available information (eg, injury reports, player profiles, and press releases).
Conclusion: This scoping review provides men\u27s hockey players and physicians taking care of elite ice hockey athletes of all levels with a single source of the most current literature regarding orthopaedic injuries. Most research focused on nonanatomic-specific injuries, intra-articular hip injuries, knee injuries, and shoulder injuries, with the majority having level 4 evidence
Smoking, Cognitive Function and Mortality in a U.S. National Cohort Study
Previous studies report that low levels cognitive function and history of smoking are associated with increased mortality risk. Elderly smokers may have increased risk of dementia, but risk in former smokers is unclear. We tested the hypotheses that the harmful effect of impaired cognitive function as related to mortality is greater in persons smoking at baseline than in others. Further, we used serum cotinine levels to assess recall bias of smoking history by cognitive function level. Data were analyzed from a longitudinal mortality follow-up study of 4,916 American men and women aged 60 years and over, examined in 1988–1994 with complete data followed an average 8.5 years. Measurements at baseline included smoking history, a short index of cognitive function (SICF), serum cotinine and socio-demographics. Death during follow-up occurred in 1,919 persons. In proportional hazards regression analysis, a significant interaction of current smoking with cognitive function was not found; but there was a significant age-smoking interaction. After adjusting for confounding by age or multiple variables, current smoking associated with over 2-fold increased mortality (hazards ratio and 95% confidence limits current versus never smoking 2.13, 1.75–2.59) and SICF with 32% reduction in mortality; top versus bottom SICF stratum 0.68, 0.53–0.88). Serum cotinine data revealed substantial recall bias of smoking history in persons with cognitive impairment. However analyses correcting for this bias did not alter the main conclusions: In a nationwide cohort of older Americans, analyses demonstrated a lower risk of death independent of confounders among those with high SICF scores and never smokers, without a significant interaction of the two
The Diabetes Remission Clinical Trial (DiRECT): protocol for a cluster randomised trial
Background:
Despite improving evidence-based practice following clinical guidelines to optimise drug therapy, Type 2 diabetes (T2DM) still exerts a devastating toll from vascular complications and premature death. Biochemical remission of T2DM has been demonstrated with weight loss around 15kg following bariatric surgery and in several small studies of non-surgical energy-restriction treatments. The non-surgical Counterweight-Plus programme, running in Primary Care where obesity and T2DM are routinely managed, produces >15 kg weight loss in 33 % of all enrolled patients. The Diabetes UK-funded Counterpoint study suggested that this should be sufficient to reverse T2DM by removing ectopic fat in liver and pancreas, restoring first-phase insulin secretion.
The Diabetes Remission Clinical Trial (DiRECT) was designed to determine whether a structured, intensive, weight management programme, delivered in a routine Primary Care setting, is a viable treatment for achieving durable normoglycaemia. Other aims are to understand the mechanistic basis of remission and to identify psychological predictors of response.
Methods/Design:
Cluster-randomised design with GP practice as the unit of randomisation: 280 participants from around 30 practices in Scotland and England will be allocated either to continue usual guideline-based care or to add the Counterweight-Plus weight management programme, which includes primary care nurse or dietitian delivery of 12-20weeks low calorie diet replacement, food reintroduction, and long-term weight loss maintenance. Main inclusion criteria: men and women aged 20-65years, all ethnicities, T2DM 0-6years duration, BMI 27-45 kg/m2. Tyneside participants will undergo Magnetic Resonance (MR) studies of pancreatic and hepatic fat, and metabolic studies to determine mechanisms underlying T2DM remission. Co-primary endpoints: weight reduction ≥ 15 kg and HbA1c <48 mmol/mol at one year. Further follow-up at 2 years.
Discussion:
This study will establish whether a structured weight management programme, delivered in Primary Care by practice nurses or dietitians, is a viable treatment to achieve T2DM remission. Results, available from 2018 onwards, will inform future service strategy
Hantavirus Pulmonary Syndrome: CD8+and CD4+Cytotoxic T Lymphocytes to Epitopes on Sin Nombre Virus Nucleocapsid Protein Isolated during Acute Illness
AbstractIn 1993 a number of cases of unexplained adult respiratory syndrome occurred in the southwestern United States. The illness was characterized by a prodrome of fever, myalgia, and other symptoms followed by the rapid onset of a capillary leak syndrome with hemoconcentration, thrombocytopenia, and pulmonary edema. Viral RNA sequences in the lungs identified a new member of the hantavirus genus, Sin Nombre virus (SNV), unique to North America. Pulmonary endothelial cells were heavily infected but were not necrotic. We speculated that this capillary leak syndrome was initiated by immune responses to the SNV-infected pulmonary endothelial cells. We isolated a CD8+cytotoxic T lymphocyte (CTL) clone directly from the blood of a patient with the acute hantavirus pulmonary syndrome (HPS) which recognizes a SNV specific epitope on the virus nucleocapsid protein (aa 234–242) that is restricted by HLA C7 and produces IFNγ but not IL-4. We identified a second CD8+CTL epitope located within another site aa 131–139 on the nucleocapsid protein, which is HLA B35 restricted, and a CD4+CTL epitope located on a third site on nucleocapsid protein aa 372–380 using lymphocytes obtained during HPS from another patient that were stimulatedin vitro.Hantavirus specific CD8+and CD4+CTL may contribute to the immunopathology and capillary leak syndrome observed in the HPS
P2X receptors in GtoPdb v.2023.1
P2X receptors (nomenclature as agreed by the NC-IUPHAR Subcommittee on P2X Receptors [49, 146]) have a trimeric topology [118, 128, 144, 197] with two putative TM domains per P2X subunit, gating primarily Na+, K+ and Ca2+, exceptionally Cl-. The Nomenclature Subcommittee has recommended that for P2X receptors, structural criteria should be the initial basis for nomenclature where possible. X-ray crystallography indicates that functional P2X receptors are trimeric and three agonist molecules are required to bind to a single trimeric assembly in order to activate it [118, 144, 95, 103, 177]. Native receptors may occur as either homotrimers (e.g. P2X1 in smooth muscle) or heterotrimers (e.g. P2X2:P2X3 in the nodose ganglion [280], P2X1:P2X5 in mouse cortical astrocytes [162], and P2X2:P2X5 in mouse dorsal root ganglion, spinal cord and mid pons [53, 234]. P2X2, P2X4 and P2X7 receptor activation can lead to influx of large cationic molecules, such as NMDG+, Yo-Pro, ethidium or propidium iodide [211]. The permeability of the P2X7 receptor is modulated by the amount of cholesterol in the plasma membrane [193]. The hemi-channel pannexin-1 was initially implicated in the action of P2X7 [212], but not P2X2, receptors [41], but this interpretation is probably misleading [215]. Convincing evidence now supports the view that the activated P2X7 receptor is immediately permeable to large cationic molecules, but influx proceeds at a much slower pace than that of the small cations Na+, K+, and Ca2+ [66]
Component analysis of errors in satellite-based precipitation estimates
Satellite-based precipitation estimates have great potential for a wide range of critical applications, but their error characteristics need to be examined and understood. In this study, six (6) high-resolution, satellite-based precipitation data sets are evaluated over the contiguous United States against a gauge-based product. An error decomposition scheme is devised to separate the errors into three independent components, hit bias, missed precipitation, and false precipitation, to better track the error sources associated with the satellite retrieval processes. Our analysis reveals the following. (1) The three components for each product are all substantial, with large spatial and temporal variations. (2) The amplitude of individual components sometimes is larger than that of the total errors. In such cases, the smaller total errors are resulting from the three components canceling one another. (3) All the products detected strong precipitation (\u3e40 mm/d) well, but with various biases. They tend to overestimate in summer and underestimate in winter, by as much as 50% in either season, and they all miss a significant amount of light precipitation (\u3c10 mm/d), up to 40%. (4) Hit bias and missed precipitation are the two leading error sources. In summer, positive hit bias, up to 50%, dominates the total errors for most products. (5) In winter, missed precipitation over mountainous regions and the northeast, presumably snowfall, poses a common challenge to all the data sets. On the basis of the findings, we recommend that future efforts focus on reducing hit bias, adding snowfall retrievals, and improving methods for combining gauge and satellite data. Strategies for future studies to establish better links between the errors in the end products and the upstream data sources are also proposed
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