407 research outputs found
Predicting live weight using body measurements in Afar goates in north eastern Ethiopia
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An economic analysis of food stamp participation in West Virginia
Poverty and food insecurity are challenging socio-economic problems that policy makers are trying to address for a long time. Among other things, providing financial and in-kind assistance are some of the initiatives taken to improve food security for low income households. Food Stamp Program is an important assistance program that serves to meet this goal. The objective of this study is to examine the implication of economic and policy variables on food stamp participation in West Virginia. To understand the current and lagged impact of economic variables on current food stamp participation, static and dynamic econometric models are used. These models are estimated using panel data of West Virginia counties. Results indicate that county poverty, unemployment, and the cost of living directly affect the level of county food stamp participation; while employment growth and PRWORA welfare policy tend to reduce county level food stamp program participation
Examination of Factors Associated with Obesity, Physical Activity and Income in Metropolitan Areas of the United States
The prevalence of obesity has increased significantly in the past three decades. Obesity and inadequate physical activity are the major contributors to health problems. In addition to understanding the contribution of biological and psychological factors in the growth of obesity rates, there is a growing interest in understanding the impact of environmental factors on obesity. This study examines the relationship between obesity, socioeconomic factors, environmental factors and physical activity. The study is focused on metropolitan areas and relied on metropolitan county level built environment, natural amenities and outdoor recreational opportunities measures. Individual level socioeconomic and location information is from the National Longitudinal Youth Survey (NLYS79). Panel data of 1768 individual observations from 1998-2008 is used. The study employed 2SLS and ordered probit estimation methods.;Not all built environment measures have significant association with obesity. Density is negatively associated with obesity, whereas, mixed land use is positively associated with obesity. No evidence is found that links street connectivity and centeredness to obesity. The association between built environment and physical activity is mixed and inconsistent. Mixed land use is found to be positively associated with the likelihood participation in regular physical activity and negatively associated with physical inactivity and occasional physical activity, whereas, street connectivity is negatively associated with regular physical activity and positively linked with no physical activity and occasional physical activity. No evidence is found that links density and centeredness with the likelihood of participating in physical activity or inactivity.;The implications of natural amenities and recreational opportunities for obesity and physical activity are mixed. Climate and winter-based recreational opportunities are found to be positively associated with obesity whereas, no significant relationship is observed between BMI and landbased and water-based recreational opportunities. Land-based and winter-based recreational opportunities are found to increase the likelihood of participating in regular physical activity and decrease the likelihood of physical inactivity and occasional physical activity. Climate and water-based recreational opportunities are not significantly associated with the likelihood of participating in physical activity or physical inactivity
Seroprevalence of Salmonella Gallinarum Infection in Chicken Population of parts of Tigray and Addis Ababa by Plate Agglutination and Micro-agglutination Tests
Ethiopia owns a large poultry population whose growth is highly constrained by diseases. Fowl typhoid is a serious concern in growing and adult poultry and results from infection by Salmonella Gallinarum (Salmonella enterica subsp. enterica serovar Gallinarum biovar Gallinarum). Knowledge of the prevalence of the disease with confirmatory diagnosis is of paramount importance to embark on a control or prevention program. Seroprevalence of this infection in chicken population of Ethiopia has been reported from some parts of this country but in most of the reports it is based exclusively on a rapid slide agglutination test without further confirmation by another specific test. This study screened 279 sera samples of poultry for S. Gallinarum infection by employing plate agglutination test using colored antigen of S. Gallinarum that revealed 125(44.80%) of 279 sera samples positive. However, when plate positive samples were further tested for confirmation by microagglutination test by employing plain antigen of S. Gallinarum, only 55 (19.71%) were serologically positive lowering the prevalence rate from 44.8% to 19, 71%. The study reveals the serological prevalence of Salmonella gallinarum infection in poultry population of the study areas and recommends that the initial screening of this infection by a test like plate agglutination must always be followed by another specific test to get an accurate estimate of this infection.Keywords: Micro-agglutination test, Plate agglutination test, Poultry population, Salmonella gallinarum, Seroprevalence, Addis Ababa, Tigray, Ethiopia
Shock and patient preimplantation type D personality are associated with poor health status in patients with implantable cardioverter-defibrillator
Background: Implantable cardioverter-defibrillator (ICD) shock is a critical event to patients associated with well-being after implantation, although other factors may play an equally important role. We compared the association of shock and the patient's preimplantation personality with health status, using a prospective study design.
Methods and Results: Consecutively implanted ICD patients (n=383; 79% men) completed the Type D Scale at baseline and the Short-Form Health Survey 36 (SF-36) at baseline and 3, 6, and 12 months. Of all patients, 23.5% had a Type D personality and 13.8% received a shock during follow-up. Shocked patients reported significantly poorer health status, as did Type D patients. Health status patterns were poorest in patients with combined Type D personality and shock during follow-up. Shock during follow-up was a significant independent associate of poorer health status for 4 of 8 subscales of the SF-36 and the Mental Component Summary (all P<.05), with shocked patients scoring between 2.60 to 13.30 points lower than nonshocked patients. Type D personality was an independent associate of poor postimplantation health status for 6 of 8 of the SF-36 subscales and the Mental Component Summary, with Type D patients scoring between 2.12 to 8.02 points lower, adjusting for demographic and clinical characteristics.
Conclusions: ICD shock and the patient's preimplantation personality disposition were equally important associates of health status 12 months after implantation. Identification of the patient's personality profile before ICD implantation may help identify subsets of patients who may need additional care, for example, with a psychosocial component
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CAD Model and Visual Assisted Control System for NIF Target Area Positioners
The National Ignition Facility (NIF) target chamber contains precision motion control systems that reach up to 6 meters into the target chamber for handling targets and diagnostics. Systems include the target positioner, an alignment sensor, and diagnostic manipulators (collectively called positioners). Target chamber shot experiments require a variety of positioner arrangements near the chamber center to be aligned to an accuracy of 10 micrometers. Positioners are some of the largest devices in NIF, and they require careful monitoring and control in 3 dimensions to prevent interferences. The Integrated Computer Control System provides efficient and flexible multi-positioner controls. This is accomplished through advanced video-control integration incorporating remote position sensing and realtime analysis of a CAD model of target chamber devices. The control system design, the method used to integrate existing mechanical CAD models, and the offline test laboratory used to verify proper operation of the control system are described
Endovascular Treatment of Acute Ischemic Stroke With the Penumbra System in Routine Practice: COMPLETE Registry Results
Background and Purpose:
The purpose of the COMPLETE (International Acute Ischemic Stroke Registry With the Penumbra System Aspiration Including the 3D Revascularization Device) registry was to evaluate the generalizability of the safety and efficacy of the Penumbra System (Penumbra, Inc, Alameda) in a real-world setting. Methods:
COMPLETE was a global, prospective, postmarket, multicenter registry. Patients with large vessel occlusionāacute ischemic stroke who underwent mechanical thrombectomy using the Penumbra System with or without the 3D Revascularization Device as frontline approach were enrolled at 42 centers (29 United States, 13 Europe) from July 2018 to October 2019. Primary efficacy end points were successful postprocedure angiographic revascularization (modified Thrombolysis in Cerebral Infarction ā„2b) and 90-day functional outcome (modified Rankin Scale score 0ā2). The primary safety end point was 90-day all-cause mortality. An imaging core lab determined modified Thrombolysis in Cerebral Infarction scores, Alberta Stroke Program Early CT Scores, clot location, and occurrence of intracranial hemorrhage at 24 hours. Independent medical reviewers adjudicated safety end points. Results:
Six hundred fifty patients were enrolled (median age 70 years, 54.0% female, 49.2% given intravenous recombinant tissue plasminogen activator before thrombectomy). Rate of modified Thrombolysis in Cerebral Infarction 2b to 3 postprocedure was 87.8% (95% CI, 85.3%ā90.4%). First pass and postprocedure rates of modified Thrombolysis in Cerebral Infarction 2c to 3 were 41.5% and 66.2%, respectively. At 90 days, 55.8% (95% CI, 51.9%ā59.7%) had modified Rankin Scale score 0 to 2, and all-cause mortality was 15.5% (95% CI, 12.8%ā18.3%). Conclusions:
Using Penumbra System for frontline mechanical thrombectomy treatment of patients with large vessel occlusionāacute ischemic stroke in a real-world setting was associated with angiographic, clinical, and safety outcomes that were comparable to prior randomized clinical trials with stringent site and operator selection criteria. REGISTRATION:
URL: https://www.clinicaltrials.gov; Unique identifier: NCT0346456
Mechanisms for the Intracellular Manipulation of Organelles byĀ Conventional Electroporation
Conventional electroporation (EP) changes both the conductance and molecular permeability of the plasma membrane (PM) of cells and is a standard method for delivering both biologically active and probe molecules of a wide range of sizes into cells. However, the underlying mechanisms at the molecular and cellular levels remain controversial. Here we introduce a mathematical cell model that contains representative organelles (nucleus, endoplasmic reticulum, mitochondria) and includes a dynamic EP model, which describes formation, expansion, contraction, and destruction for the plasma and all organelle membranes. We show that conventional EP provides transient electrical pathways into the cell, sufficient to create significant intracellular fields. This emerging intracellular electrical field is a secondary effect due to EP and can cause transmembrane voltages at the organelles, which are large enough and long enough to gate organelle channels, and even sufficient, at some field strengths, for the poration of organelle membranes. This suggests an alternative to nanosecond pulsed electric fields for intracellular manipulations.National Science Foundation (U.S.) (NSF Graduate Research Fellowship)National Institutes of Health (U.S.) (grant No. R01-GM63857)Aegis Industries, Inc
Characterizing nutrient patterns of food items in adolescent diet using data from a novel citizen science project and the US National Health and Nutrition Examination Survey (NHANES)
IntroductionA healthy diet is essential for promoting good health during adolescence and mitigating disease risks in adulthood. This underscores the need for improved nutrition education and increased access to healthier food choices. However, the accuracy of dietary data poses a significant challenge in nutritional research.MethodsWe utilized and analyzed a novel dietary record dataset collected through a high school citizen science project to address this issue. We focused on nutrients rather than food groups to characterize adolescent dietary patterns. The same analyses were performed on the 2019ā2021 National Health and Nutrition Examination Survey data for comparison.ResultsBased on the U.S. Food and Drug Administrationās recommended daily value (DV) for nutrients, the majority of food items in our citizen science dataset are low (i.e., <5% DV) in lipids, fiber, potassium, calcium, iron, sugar, and cholesterol. Only a minority of items are high (i.e., >20% DV) in macro and micronutrients. The clustering analysis identified nine food clusters with distinct nutrient profiles that vary significantly in size. The analyses on the NHANES data yielded similar findings, but with higher proportions of foods high in energy, lipids, carbohydrates, sugar, iron, and sodium compared with those of the citizen science dataset.DiscussionThis study demonstrates the potential of citizen science projects in gathering valuable dietary data and understanding adolescent nutrient intake. Identifying critical nutrient gaps can guide targeted nutrition education and the provision of accessible healthier food options, leading to positive health outcomes during adolescence and beyond
An apoptosis targeted stimulus with nanosecond pulsed electric fields (nsPEFs) in E4 squamous cell carcinoma
Stimuli directed towards activation of apoptosis mechanisms are an attractive approach to eliminate evasion of apoptosis, a ubiquitous cancer hallmark. In these in vitro studies, kinetics and electric field thresholds for several apoptosis characteristics are defined in E4 squamous carcinoma cells (SCC) exposed to ten 300Ā ns pulses with increasing electric fields. Cell death was >95% at the highest electric field and coincident with phosphatidylserine externalization, caspase and calpain activation in the presence and absence of cytochrome c release, decreases in Bid and mitochondria membrane potential (ĪĻm) without apparent changes reactive oxygen species levels or in Bcl2 and Bclxl levels. Bid cleavage was caspase-dependent (55ā60%) and calcium-dependent (40ā45%). Intracellular calcium as an intrinsic mechanism and extracellular calcium as an extrinsic mechanism were responsible for about 30 and 70% of calcium dependence for Bid cleavage, respectively. The results reveal electric field-mediated cell death induction and progression, activating pro-apoptotic-like mechanisms and affecting plasma membrane and intracellular functions, primarily through extrinsic-like pathways with smaller contributions from intrinsic-like pathways. Nanosecond second pulsed electric fields trigger heterogeneous cell death mechanisms in E4 SCC populations to delete them, with caspase-associated cell death as a predominant, but not an unaccompanied event
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