4,213 research outputs found

    Assessment of the Impacts of Thunderstorm on Flight Operations at Murtala Mohammed International Airport, Ikeja, Lagos State, Nigeria

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    The inefficiency of the aviation industry and the persistent rise in aviation hazards have been linked to weather phenomena. As a result, researchers are looking for better solutions to the problem. The study examined the impact of thunderstorms on flight operations at Murtala Mohammed International Airport, Lagos. The data on thunderstorms and flight operations were sourced from Nigerian Meteorological Agency (NiMet) and Nigerian Airspace Management Agency (NAMA) respectively. In order to meet the research target, descriptive statistics (mean, standard deviation, and charts) and inferential statistics (Pearson’s Product Moment Correlation (PPMC) and Regression) were used. The significance level for all inferential analyses was set at 5% (0.05). The study revealed that 77.4% of thunderstorms occurred during the rainy season (April-October) while 22.6% occurred during the dry season (November-March). It also revealed some fluctuating movements of a thunderstorm in the study area. According to the findings, thunderstorms occur most frequently at the airport in June and less frequently in January and December. The study also discovered that thunderstorms at the airport are positively and significantly related to flight delays and cancellations, while the association between flight diversions and thunderstorm occurrence is positive but statistically insignificant. Furthermore, flight delays, flight diversions, and flight cancellations interact positively among themselves. The regression result of the study revealed that a 1% increase in thunderstorm occurrence leads to a 19.4% increase in flight delay, a 7.1% increase in flight cancellation, and a 4.3% increase in flight diversion. As a result, the study presented various regression models that may be utilized to make predictions. The study proposes consistent thunderstorm observation at the airport and steady forecasts using the regression models, based on the findings. However, it further recommends that pilots, air traffic controllers, and meteorologists be trained and retrained so that they can provide better and more efficient services

    Complementarity of Semileptonic BB to K2∗(1430)K_2^*(1430) and K∗(892)K^*(892) Decays in the Standard Model with Fourth Generation

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    The B→K2∗(1430)l+l−B\rightarrow K_{2}^{\ast}(1430)l^{+}l^{-} (l=ÎŒ,τ)(l=\mu,\tau) decays are analyzed in the Standard Model extended to fourth generation of quarks (SM4). The decay rate, forward-backward asymmetry, lepton polarization asymmetries and the helicity fractions of the final state K2∗(1430)K^{*}_{2}(1430) meson are obtained using the form factors calculated in the light cone sum rules (LCSR) approach. We have utilized the constraints on different fourth generation parameters obtained from the experimental information on KK, BB and DD decays and from the electroweak precision data to explore their impact on the B→K2∗(1430)l+l−B\rightarrow K_{2}^{\ast}(1430)l^{+}l^{-} decay. We find that the values of above mentioned physical observables deviate deviate significantly from their minimal SM predications. We also identify a number of correlations between various observables in B→K2∗(1430)l+l−B\rightarrow K_{2}^{\ast}(1430)l^{+}l^{-} and B→K∗(892)l+l−B\rightarrow K^{\ast}(892)l^{+}l^{-} decays. Therefore a combined analysis of these two decays will compliment each other in the searches of SM4 effects in flavor physics.Comment: 28 pages, 12 figure

    Keeping Confidence: Practice and procedure

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    Keeping Confidence: HIV and the criminal law from service provider perspectives Duration: June 2012 - March 2013 The Monument Trust generously funded Sigma Research at London School of Hygiene and Tropical Medicine and Birkbeck College to undertake a qualitative study on perceptions of criminal prosecutions for HIV transmission among HIV service providers. Five short reports outlining the key findings of the study focus on the main themes arising from our analysis of the focus group discussions. The findings and associated policy and practice recommendations will be of interest to: those who provide HIV health and social care and their professional bodies (for instance NHIVNA, CHIVA, BHIVA, BASHH, SSHA, BPS), police and others who play a role in criminal investigations and trials, and people with diagnosed HIV

    Keeping Confidence: Identifying resources

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    Keeping Confidence: HIV and the criminal law from service provider perspectives Duration: June 2012 - March 2013 The Monument Trust generously funded Sigma Research at London School of Hygiene and Tropical Medicine and Birkbeck College to undertake a qualitative study on perceptions of criminal prosecutions for HIV transmission among HIV service providers. Five short reports outlining the key findings of the study focus on the main themes arising from our analysis of the focus group discussions. The findings and associated policy and practice recommendations will be of interest to: those who provide HIV health and social care and their professional bodies (for instance NHIVNA, CHIVA, BHIVA, BASHH, SSHA, BPS), police and others who play a role in criminal investigations and trials, and people with diagnosed HIV. Catherine Dodds, Matthew Weait, Adam Bourne, Siri Egede, Kathie Jessup and Peter Weatherburn

    Keeping Confidence: Understanding the Law

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    Keeping Confidence: HIV and the criminal law from service provider perspectives Duration: June 2012 - March 2013 The Monument Trust generously funded Sigma Research at London School of Hygiene and Tropical Medicine and Birkbeck College to undertake a qualitative study on perceptions of criminal prosecutions for HIV transmission among HIV service providers. Five short reports outlining the key findings of the study focus on the main themes arising from our analysis of the focus group discussions. The findings and associated policy and practice recommendations will be of interest to: those who provide HIV health and social care and their professional bodies (for instance NHIVNA, CHIVA, BHIVA, BASHH, SSHA, BPS), police and others who play a role in criminal investigations and trials, and people with diagnosed HIV

    Keeping Confidence: Responsibility and public health

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    Keeping Confidence: HIV and the criminal law from service provider perspectives Duration: June 2012 - March 2013 The Monument Trust generously funded Sigma Research at London School of Hygiene and Tropical Medicine and Birkbeck College to undertake a qualitative study on perceptions of criminal prosecutions for HIV transmission among HIV service providers. Five short reports outlining the key findings of the study focus on the main themes arising from our analysis of the focus group discussions. The findings and associated policy and practice recommendations will be of interest to: those who provide HIV health and social care and their professional bodies (for instance NHIVNA, CHIVA, BHIVA, BASHH, SSHA, BPS), police and others who play a role in criminal investigations and trials, and people with diagnosed HIV

    The Association between Food Insecurity, Glycemic Control, Self-Care, and Quality of Life in Adults with Type 2 Diabetes

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    Food insecurity is the inability to obtain adequate nutritious food. Therefore, the study assessed the relationship between food insecurity, glycemic control, self-care behaviors, and quality of life in adults with type 2 diabetes (T2DM). Cross sectional study of 356 adults with T2DM recruited from an academic medical center and a veterans affairs medical center. The independent predictor was food insecurity, and the outcomes were glycosylated hemoglobin A1c, self-care behaviors, and quality of life (QOL). Logistic regression was used to assess the independent factors associated with food insecurity. Multiple linear regression was used to assess the association between food insecurity and outcomes. Stata was used for the analyses. The majority (88%) was ≄50 years old, male (70%), and non-Hispanic black (55%). Thirty-five percent were food insecure. Compared to those who had 16 years of education were less likely to be food insecure (Odds ratio (OR) 0.25; 95% Confidence Interval (CI) 0.07, 0.92). Compared to those making \u3c10,000,thosewithincomelevelsof10,000, those with income levels of 20,000-34,999(OR0.31;9534,999 (OR 0.31; 95% CI 0.13, 0.74) and ≄35,000 (OR 0.15, 95% 0.06, 0.38) were less likely to be food insecure. In adjusted modeling, food insecurity was marginally associated with glycemic control (ÎČeta coefficient =-0.41; 95% CI -0.85, 0.02), and not significantly associated with self-care behaviors or QOL. In this sample of adults with T2DM, food insecurity was significantly associated with education and income and marginally associated with glycemic control. Further research is needed to assess the relationship between these factors

    Racial Disparities in the Treatment of Depression in Low-Income Persons With Diabetes

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    Individuals with diabetes are at higher risk for depression than the general population. Although depression can be treated with antidepressant medications, patients with diabetes and comorbid depression often go untreated. The goal of this study was to examine racial disparities in the treatment of depression with antidepressant medication in the southeastern U.S

    Keeping Confidence: HIV and the criminal law from service provider perspectives. Executive Summary

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    Keeping Confidence is a qualitative research study that explores the perceptions of criminal prosecutions for HIV transmission among those providing support, health and social care services for people with HIV. The main findings of the study are described in detail in four focussed reports, listed in the box above. This executive summary gives information about the background and methods of the project, and provides an overview of key themes and findings, concluding with recommendations relevant to those planning and delivering services for people with diagnosed HIV. Catherine Dodds, Matthew Weait, Adam Bourne, Siri Egede, Kathie Jessup and Peter Weatherburn. Five short reports outlining the key findings of the study focus on the main themes arising from our analysis of the focus group discussions. The findings and associated policy and practice recommendations will be of interest to: those who provide HIV health and social care and their professional bodies (for instance NHIVNA, CHIVA, BHIVA, BASHH, SSHA, BPS), police and others who play a role in criminal investigations and trials, and people with diagnosed HIV
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