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Search Results: 1 - 10 of 2072 matches for " Edwin Afari "
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Assessing malaria control in the Kassena-Nankana district of northern Ghana through repeated surveys using the RBM tools
Seth Owusu-Agyei, Elizabeth Awini, Francis Anto, Thomas Mensah-Afful, Martin Adjuik, Abraham Hodgson, Edwin Afari, Fred Binka
Malaria Journal , 2007, DOI: 10.1186/1475-2875-6-103
Abstract: Data were collected from mothers/caretakers on signs/symptoms of the most recent malaria attack for their under five year old children; the management actions that they took and their perception of health services provided at the health facilities, bednet use, antenatal attendance and place of delivery for the most recent pregnancy, malaria prophylaxis during their last pregnancy. Community health workers and herbalist/traditional healers were also interviewed about the types of health services they provide to community members.The results revealed a significant improvement in knowledge among mothers/caretakers over the three-year period; this affected caretakers' initial management of illnesses of their young children. The management in terms of the type and dosage of drugs used also improved significantly (p < 0.0001) over the period. Reported insecticide-treated bed net use among children under-five years and pregnant women significantly increased between 2000 and 2003 (p < 0.0001). Health professionals had improved on adoption of their quality of care roles.The intensification of malaria control activities and awareness creation in this district over a three year period had started demonstrating positive results towards reducing malaria disease burden.Periodic performance assessments through surveys as described and prompt feedback of results to stakeholders in the locality serves as a catalyst to improving malaria control in malaria-endemic countries.Malaria is the world's most important tropical parasitic disease; killing more people than any other communicable disease, except tuberculosis. Prevention is the best protection from malaria. It includes individual protection, such as the use of insecticide-treated bed nets, mosquito repellants and drug prophylaxis for pregnant women; community measures, such as the control of mosquito breading sites, insecticide spraying and drainage.Morbidity and mortality are particularly high among pregnant women, young childre
Major Improvements of Quartz Crystal Pulling Sensitivity and Linearity Using Series Reactance
Vojko Matko,Riko ?afari
Sensors , 2009, DOI: 10.3390/s91008263
Abstract: This paper presents a new method of substantially improving frequency pullability and linearity using reactance in series with an AT fundamental crystal operated with a series load capacitance in the range of 3 to 50 pF and frequencies in the range of 3.5 to 21 MHz. The research describes high quartz pullability and linearity by varying the load capacitance. The paper also gives impedance circuits for crystal unit (3.5 MHz) together with load capacitance and compensation reactance. The experimental results show that the new approach using compensation method of quartz crystal connected in series reactance increases the frequency pulling range by ×25 to ×100 depending on the type of oscillator and compensation factor ?k? in the temperature range of 10 to 40 °C.
Guest Editorial
Riko ?afari,Ale? Hace
International Journal of Online Engineering (iJOE) , 2008, DOI: 10.3991/ijoe.v4i4.711
Risk Factors for Buruli Ulcer in Ghana—A Case Control Study in the Suhum-Kraboa-Coaltar and Akuapem South Districts of the Eastern Region
Ernest Kenu ,Kofi Mensah Nyarko,Linda Seefeld,Vincent Ganu,Michael K?ser,Margaret Lartey,Benedict Nii Laryea Calys-Tagoe,Kwodwo Koram,Richard Adanu,Oliver Razum,Edwin Afari,Fred N. Binka
PLOS Neglected Tropical Diseases , 2014, DOI: 10.1371/journal.pntd.0003279
Abstract: Background Buruli ulcer (BU) is a skin disease caused by Mycobacterium ulcerans. Its exact mode of transmission is not known. Previous studies have identified demographic, socio-economic, health and hygiene as well as environment related risk factors. We investigated whether the same factors pertain in Suhum-Kraboa-Coaltar (SKC) and Akuapem South (AS) Districts in Ghana which previously were not endemic for BU. Methods We conducted a case control study. A case of BU was defined as any person aged 2 years or more who resided in study area (SKC or AS District) diagnosed according to the WHO clinical case definition for BU and matched with age- (+/?5 years), gender-, and community controls. A structured questionnaire on host, demographic, environmental, and behavioural factors was administered to participants. Results A total of 113 cases and 113 community controls were interviewed. Multivariate conditional logistic regression analysis identified presence of wetland in the neighborhood (OR = 3.9, 95% CI = 1.9–8.2), insect bites in water/mud (OR = 5.7, 95% CI = 2.5–13.1), use of adhesive when injured (OR = 2.7, 95% CI = 1.1–6.8), and washing in the Densu river (OR = 2.3, 95% CI = 1.1–4.96) as risk factors associated with BU. Rubbing an injured area with alcohol (OR = 0.21, 95% CI = 0.008–0.57) and wearing long sleeves for farming (OR = 0.29, 95% CI = 0.14–0.62) showed protection against BU. Conclusion This study identified the presence of wetland, insect bites in water, use of adhesive when injured, and washing in the river as risk factors for BU; and covering limbs during farming as well as use of alcohol after insect bites as protective factors against BU in Ghana. Until paths of transmission are unraveled, control strategies in BU endemic areas should focus on these known risk factors.
Web based educational tool for neural network robot control
Jure ?as,Darko Hercog,Riko ?afari
International Journal of Online Engineering (iJOE) , 2007,
Abstract: — This paper describes the application for teleoperations of the SCARA robot via the internet. The SCARA robot is used by students of mehatronics at the University of Maribor as a remote educational tool. The developed software consists of two parts i.e. the continuous neural network sliding mode controller (CNNSMC) and the graphical user interface (GUI). Application is based on two well-known commercially available software packages i.e. MATLAB/Simulink and LabVIEW. Matlab/Simulink and the DSP2 Library for Simulink are used for control algorithm development, simulation and executable code generation. While this code is executing on the DSP-2 Roby controller and through the analog and digital I/O lines drives the real process, LabVIEW virtual instrument (VI), running on the PC, is used as a user front end. LabVIEW VI provides the ability for on-line parameter tuning, signal monitoring, on-line analysis and via Remote Panels technology also teleoperation. The main advantage of a CNNSMC is the exploitation of its self-learning capability. When friction or an unexpected impediment occurs for example, the user of a remote application has no information about any changed robot dynamic and thus is unable to dispatch it manually. This is not a control problem anymore because, when a CNNSMC is used, any approximation of changed robot dynamic is estimated independently of the remote’s user. Index Terms—LabVIEW; Matlab/Simulink; Neural network control; remote educational tool; robotics
Global Self-Esteem and Self-Efficacy Correlates: Relation of Academic Achievement and Self-Esteem among Emirati Students
Ernest Afari,Graeme Ward,Myint Swe Khine
International Education Studies , 2012, DOI: 10.5539/ies.v5n2p49
Abstract: We investigated the relationships between global self-esteem, academic self-efficacy and academic performance among a sample of 255 college students in the United Arab Emirates. The widely used Rosenberg’s Self-Esteem Scale (RSES; Rosenberg, 1965) and an academic self-efficacy scale, modified from (Jinks and Morgan, 1999) were used to assess student’s self-esteem and their academic self-efficacy. Each student’s average grade for the mid-semester and final semester was used as the performance measure. Confirmatory factor analyses using Analysis of Moment Structures (AMOS) version 18 performed on the scores of the RSES revealed two factors (positive and negative self-esteem) as hypothesized. Correlated results indicated significant relationships between global self-esteem and academic self-efficacy. Also academic achievement was associated with having high academic self-efficacy.
Severe & Moderate BPH Symptoms in Mid-Aged Men Improve with Isoflavonoid-Equol Treatment: Pilot Intervention Study  [PDF]
Edwin D. Lephart
Open Journal of Urology (OJU) , 2013, DOI: 10.4236/oju.2013.31004

Benign prostatic hyperplasia (BPH) is the pathological cellular progression of glandular proliferation associated with aging. Current available treatment options for BPH have limitations and various adverse effects. Equol is a polyphenolic/isoflavonoid molecule derived from intestinal metabolism, dairy and dietary plant sources. It has the unique characteristic to bind specifically 5α-dihydrotestosterone (5α-DHT) by sequestering 5α-DHT from the androgen receptor, thus decreasing androgen hormone actions to improve prostate health by acting as a selective androgen modulator (SAM). It also has affinity for estrogen related receptor gamma (ERR-γ) and estrogen receptor beta (ER-β) within the prostate that is known to improve male health via selective estrogen receptor modulatory (SERM) activities to decrease inflammation, cellular proliferation and carcinogenesis. We investigated the possible clinical efficacy of equol on the symptoms associated with benign prostatic hyperplasia (BPH) in this study. Materials and Methods: We performed a pilot intervention study evaluating the effects of low dose oral equol supplement (6 mg, twice a day with meals) for 4 weeks in a total of 18 men (49 - 60 years old) with moderate or severe BPH. Subjects included in the study: gave informed consent, underwent a physical examination and verified their BPH symptoms as measured by the International Prostate Symptom Scores (IPSS) and then were assigned to the moderate or severe BPH groups based upon their total IPSS index. All adverse events were reported. The primary efficacy measure was the IPSS parameters comparing baseline to 2 and 4 week IPSS indices. Blood samples were collected at the baseline and 4th week visits that served as secondary efficacy parameters that included testosterone, 5α-DHT and general blood chemistries along with cardiac and hepatic function panels. Results: Low dose equol positively improved moderate to severe BPH symptoms according to the IPSS indices. In moderately symptomatic men (n = 10) 5 out of 7 of the IPSS parameters significantly improved by 4 weeks of equol treatment. In severely symptomatic men (n = 8) all 7 of the IPSS parameters significantly improved with 4 weeks of equol treatment. There were no significant changes in androgen levels, general blood chemistries or cardiac and hepatic function parameters. Although, 5α-DHT levels declined by 21% in severely symptomatic men (from baseline vs. 4 week values).

Smoking and Pancreatic Disease  [PDF]
Mouad Edderkaoui, Edwin Thrower
Journal of Cancer Therapy (JCT) , 2013, DOI: 10.4236/jct.2013.410A005

Smoking is a major risk factor for chronic pancreatitis and pancreatic cancer. However, the mechanisms through which it causes the diseases remain unknown. In the present manuscript we reviewed the latest knowledge gained on the effect of cigarette smoke and smoking compounds on cell signaling pathways mediating both diseases. We also reviewed the effect of smoking on the pancreatic cell microenvironment including inflammatory cells and stellate cells.

Software Frameworks, Architectural and Design Patterns  [PDF]
Njeru Mwendi Edwin
Journal of Software Engineering and Applications (JSEA) , 2014, DOI: 10.4236/jsea.2014.78061

Software systems can be among the most complex constructions in engineering disciplines and can span into years of development. Most software systems though implement in part what has already been built and tend to follow known or nearly known architectures. Although most software systems are not of the size of say Microsoft Windows 8, complexity of software development can be quick to increase. Thus among these methods that are the most important is the use of architectural and design patterns and software frameworks. Patterns provide known solutions to re-occurring problems that developers are facing. By using well-known patterns reusable components can be built in frameworks.Software frameworks provide developers with powerful tools to develop more flexible and less error-prone applications in a more effective way. Software frameworks often help expedite the development process by providing necessary functionality “out of the box”. Providing frameworks for reusability and separation of concerns is key to software development today. In this study I take a look at the state of art and the impact of frameworks and patterns in software development.

The Potential of Adaptive Mentorship©: Experts’ Perspectives  [PDF]
Edwin Ralph, Keith Walker
Open Journal of Social Sciences (JSS) , 2014, DOI: 10.4236/jss.2014.28013
Abstract: In recent years, global interest in the processes of mentorship and coaching has expanded across all disciplinary fields. Educational institutions, commercial enterprises, and other organizations have integrated mentorship processes into their educational programs to help prepare/train protégés for entry into a specific professions or occupations and/or to upgrade their related skills/knowledge. Over the past quarter century, in partial response to the popularity of mentoring, the authors have developed a mentoring model called Adaptive Mentorship© (AM). Research conducted by the authors and others has affirmed AM’s value in improving mentoring practice in a variety of disciplines. In the present article, the authors summarize assessments of the model that they solicited during the past five years from 49 multi-disciplinary groups or panels of experts. The experts’ positive statements regarding AM outweighed their cautionary comments by a ratio of 2:1. The strengths that they identified were that AM conceptualized the entire mentorship process in an understandable manner, and that it helped reveal potential interpersonal conflicts as well as practical solutions for them. The caveats identified by the experts were that personnel employing the AM model must apply it sensibly, sensitively, and flexibly—especially in cross-cultural contexts.
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