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Search Results: 1 - 10 of 149168 matches for " Timothy Peace B "
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Optimization and audit of radiation dose during percutaneous transluminal coronary angioplasty
Livingstone Roshan,Timothy Peace B,Chandy Sunil,George Paul
Journal of Medical Physics , 2007,
Abstract: The percutaneous transluminal coronary angioplasty (PTCA) is one of the interventional procedures which impart high radiation doses to patients compared to the other cardiologic procedures. This study intends to audit and optimize radiation dose imparted to patients undergoing PTCA. Forty-four patients who underwent PTCA involving single or multiple stent placement guided under cardiovascular X-ray machine were included in the study. Radiation doses were measured using dose area product (DAP) meter for patients undergoing single and multiple stent placements during PTCA. A dose reduction of 27-47% was achieved using copper filters and optimal exposure parameters. The mean DAP values before optimization were 66.16 and 122.68 Gy cm 2 for single and multiple stent placement respectively. These values were 48.67 and 65.44 Gy cm 2 respectively after optimization. In the present scenario, due to the increase in the number of PTCAs performed and the associated risk from radiation, periodical audit of radiation doses for interventional procedures are recommended.
Audit of radiation dose to patients during coronary angiography
Livingstone Roshan,Chandy Sunil,Peace Timothy,George Paul
Indian Journal of Medical Sciences , 2007,
Abstract: BACKGROUND: There is widespread concern about radiation doses imparted to patients during cardiology procedures in the medical community. The current study intends to audit and optimize radiation dose to patients undergoing coronary angiography (CA) performed using two dedicated cardiovascular machines. MATERIALS AND METHODS: One hundred and forty nine patients who underwent CA are reported in this study. Dose auditing was done by implementing dose reduction strategies using spectral filters and by evaluating work practices of operators involved in performing CA. SATISTICAL ANALYSIS: A Student′s ′t′ test was used to analyze the statistical significance. RESULTS AND CONCLUSION: The radiation dose imparted to patients was measured using dose area product (DAP) meter. The mean DAP values during CA before optimization was 55.86 Gy cm2 and after optimization was 27.71 Gy cm2. No ill-effects of radiation were reported for patients who underwent CA. Use of copper filtration may be recommended for procedures performed using cardiovascular machines.
The Contours of a Just and Lasting Peace
Coalition for Peace
Kasarinlan : Philippine Journal of Third World Studies , 1988,
Abstract:
The People's Christmas Ceasefire and the Challenge of Forging Genuine and Lasting Peace
Coalition for Peace
Kasarinlan : Philippine Journal of Third World Studies , 1988,
Abstract:
Between beauty and humiliation: casting a sharp eye on the panacea of psychology
Peace Kiguwa
Psychology in Society , 2009,
Abstract:
Efficacy and Cost-Benefit Analysis of Indigenous Technical Knowledge versus Recommended Integrated Pest and Disease Management Technologies on Common Beans in South Western Uganda  [PDF]
Peace Kankwatsa
Open Access Library Journal (OALib Journal) , 2018, DOI: 10.4236/oalib.1104589
Abstract:
The common bean is the second most important food and third economically important crop after banana and coffee in the South Western Agro-Ecological Zone of Uganda. Farmers’ returns to investment in bean production are consistently negative mainly due to losses resulting from collective effects of insect pests and diseases that cause damages at the various plant growth stages. This research study was carried out to 1) identify the major insect pests and diseases affecting the common beans in the zone; 2) test and compare the performance of the local/traditional practices versus integrated pest and disease management (IPDM) technology combinations; 3) determine the yield performance of improved varieties under the different pest control practices; 4) evaluate the profitability of the different pest and disease management practices. Results showed that cutworm, thrips, aphid and defoliating beetles were the major insect pests, while angular leaf spot, ascochyta blight, anthracnose and the bean common mosaic virus (BCMV) were the major diseases. Improved varieties managed with the recommended IPDM technology combination were more protected compared to the farmers’ indigenous practices. The climbing varieties had significantly higher yield (3.4 t/ha) than the local bush variety (1.2 t/ha). Consequently, the application of indigenous practices resulted in negative returns to investment while the combination of research recommended technologies including judicial inorganic pesticide application led to positive returns to investment in bean production. The marginal rate of return (MRR) of IPDM technologies including inorganic pesticides was two times greater, implying that integration of improved variety with recommended agronomic crop management technologies plus judicial chemical application is economically feasible for increased common bean production in South Western Uganda.
Spatial variation of carbon dioxide fluxes in corn and soybean fields  [PDF]
Jerry L. Hatfield, Timothy B. Parkin
Agricultural Sciences (AS) , 2012, DOI: 10.4236/as.2012.38120
Abstract: Spatial variation of soil carbon dioxide (CO2) flux during a growing season within corn and soybean canopies has not been quantified. These cropping systems are the most intense in the United States and the potential for carbon (C) sequestration in these systems through changes in soil management practices create an opportunity for reduction in greenhouse gas emissions; however, the need to understand the variation in fields is critical to evaluating changes in management systems. A study was designed to evaluate the spatial variation in soil CO2 fluxes along two transects in corn and soybean fields. Samples were collected every 5 m along a 100 m transect between the rows of the crop and also along a transect in which the plants had been removed to reduce the potential of root respiration. Soil CO2 fluxes were collected at each position with air temperature, soil temperature at 0.05 m, and soil water content (0 - 0.06 m). At the end of the season, soil samples for the upper 0.1 m were collected for soil organic C content, pH, sand, silt, and clay contents. On each day measurements were made, the observed CO2 emissions were scaled by dividing the CO2 flux at each position by the mean CO2 flux of the entire transect. Observed CO2 fluxes were signifycantly larger in the row than in the fallow position for both crops. There were no differences between the corn and soybean fallow transects; however, the corn row samples were larger than the soybean row samples. No consistent spatial patterns were observed in the CO2 fluxes or any of the soil properties over the course of the study. When the CO2 flux data were combined over the season, there was a significant spatial pattern in the fallow transects for both crops but not for the row transects. Sampling for CO2 flux values in cropping systems has to consider the presence of a crop canopy and the amount of root respiration.
Tuning the metamagnetism of an antiferromagnetic metal
J. B. Staunton,M. dos Santos Dias,J. Peace,Z. Gercsi,K. G. Sandeman
Physics , 2012, DOI: 10.1103/PhysRevB.87.060404
Abstract: We describe a `disordered local moment' (DLM) first-principles electronic structure theory which demonstrates that tricritical metamagnetism can arise in an antiferromagnetic metal due to the dependence of local moment interactions on the magnetisation state. Itinerant electrons can therefore play a defining role in metamagnetism in the absence of large magnetic anisotropy. Our model is used to accurately predict the temperature dependence of the metamagnetic critical fields in CoMnSi-based alloys, explaining the sensitivity of metamagnetism to Mn-Mn separations and compositional variations found previously. We thus provide a finite-temperature framework for modelling and predicting new metamagnets of interest in applications such as magnetic cooling.
Revealing the Ubiquitous Effects of Quantum Entanglement—Toward a Notion of God Logic  [PDF]
Wen-Ran Zhang, Karl E. Peace
Journal of Quantum Information Science (JQIS) , 2013, DOI: 10.4236/jqis.2013.34019
Abstract:

Following Spinoza-Einstein’s interpretation of God or nature, the notion “God Logic” is proposed. This notion is to serve as an elicitation for a consistent set of necessary criteria for: 1) developing the logical foundation of quantum gravity as envisaged by Einstein, 2) revealing the ubiquitous effects of quantum entanglement as suggested by Roger Penrose, and 3) programming the universe as proposed by Seth Lloyd. An evolving set of eleven criteria is proposed for the notion. The possibility of inventing such a logical system is analyzed. A supersymmetrical candidate logic of negative-positive energy dynamic equilibrium is introduced and assessed against the set of criteria. It is shown that the first 10 criteria are met or partially met by the candidate. But the question whether the 11th criterion has been or can be met is left open for discussion and further research effort. The assessment leads to a few predictions. Notably, it is predicted that, should Boson-Fermion symmetry or broken symmetry be observed, it would be caused by bipolar symmetry or broken symmetry of negative-positive energies.

Awareness of breast cancer risk factors and practice of breast self examination among female undergraduates in university of Nigeria Enugu campus  [PDF]
Peace Iheanacho, Afam Ndu, Amaka Doris Emenike
Open Journal of Nursing (OJN) , 2013, DOI: 10.4236/ojn.2013.31019
Abstract:
Breast cancer patients generally have low rates of survival due to being diagnosed at advanced stages raising critical issues about prevention and avoidance of risk factors. Breast self examination makes women more “breast aware”, which in turn may lead to an earlier diagnosis of breast cancer. In Nigeria, the statistics of breast cancer have overtaken cancer of the cervix to become the commonest malignancy in women. This study was carried out to determine the awareness of breast cancer risk factors and practice of breast self examination among female students of the University of Nigeria Enugu Campus. The descriptive survey design was used for the study. The population of the study was all the female students that reside in hostels in the campus (2400) in number. A sample of 240 students was selected using quota sampling technique. Structured questionnaires based on the research objectives were used for data collection. The results of the study showed that most of the students have little knowledge of breast cancer risk factors and majority of the students do not practice BSE monthly. It was recommended that there should be regular organization of seminars and workshops for students to address sensitive topics like breast cancer risk factors and breast self examination.
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