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Search Results: 1 - 10 of 1282 matches for " Tracy RP "
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Tamoxifen may reduce CHD risk via inflammatory mediators
Lyford Joanna,Cushman M,Costantino JP,Tracy RP
Current Controlled Trials in Cardiovascular Medicine , 2001, DOI: 10.1186/cvm-2001-72051
A New Method of Estimating the Asset Rate of Return  [PDF]
Moawia Alghalith, Tracy Polius
Theoretical Economics Letters (TEL) , 2011, DOI: 10.4236/tel.2011.11001
Abstract: We present a new consumption-based method of estimating the asset rate of return.
Measured and Perceived Physical Fitness, Intention, and Self-Reported Physical Activity in Adolescence  [PDF]
Timo Jaakkola, Tracy Washington
Advances in Physical Education (APE) , 2011, DOI: 10.4236/ape.2011.12004
Abstract: Objective: The aim of this study was to investigate the associations among measured physical fitness, perceived fitness, intention towards future physical activity and self-reported physical activity through junior high school years. Methods: Study participants included 122 Finnish students who were 13 years old during Grade 7. The sample was comprised of 80 girls and 42 boys from 3 junior high schools (Grades 7-9). During the autumn semester of Grade 7, students completed fitness tests and a questionnaire analyzing self-perception of their physical fitness. The questionnaire delivered at Grade 8 included intention towards future physical activity. At Grade 9 students’ self-reported physical activity levels. Results: Structural Equation Modelling revealed an indirect path from physical fitness to self-reported physical activity via perceived physical fitness and intention towards future physical activity. The model also demonstrated a correlation between perceived physical fitness and physical activity. Squared multiple correlations revealed that perceived physical fitness explained 33 % of the actual physical fitness. Conclusions: The results of this study highlight the role of physical and cognitive variables in the process of adoption of physical activity in adolescence.
Collision Resolution MAC Protocols for Wireless Ad Hoc Networks  [PDF]
Xinhua Yang, Tracy Camp
Communications and Network (CN) , 2013, DOI: 10.4236/cn.2013.51003

In wireless ad hoc networks, nodes cooperatively form a network without any infrastructure such as a BS/AP (base station or access point). The widely-used contention-based MAC protocol, IEEE 802.11b, is inefficient in multi-hop networks due to the hidden and exposed terminal problems. The most popular schedule-based MAC protocol, TDMA (time division multiple access), is difficult to implement in an ad hoc network due to the lack of infrastructure. The contribution of this paper is to provide the community novel and efficient MAC (medium access control) protocols (i.e., a collision resolution protocol) for a wireless ad hoc network without a centralized infrastructure. We propose two new MAC protocols (one distributed algorithm and one cluster-based algorithm) that use a collision resolution scheme for a network with a single BS/AP. We first compare the performance of our distributed algorithm with our cluster-based algorithm. Then, we compare our algorithm that performs better (i.e., our cluster-based algorithm) to TDMA in a two-hop network. The simulation results illustrate that our cluster-based algorithm provides higher throughput and lower delay than TDMA in a two-hop network.

Research Findings Using Mindfulness-Based Interventions for Chronic Pain  [PDF]
Tracy L. Skaer
Pain Studies and Treatment (PST) , 2015, DOI: 10.4236/pst.2015.34005
Abstract: Chronic pain is a complex condition that is very detrimental to physical and psychological wellbeing. It carries a significant level of disability and economic burden. Pain patients frequently experience comorbid mental illness (e.g. depression, anxiety, PTSD, insomnia) and often require psychotherapeutic interventions in addition to medication management. Mindfulness-based interventions (MBIs) have emerged as a means to treat several chronic conditions (e.g. chronic pain, depression, anxiety, substance abuse, stress, insomnia). The objective of this review is to evaluate the current research on the use of MBIs in chronic pain managment. Although there are several controlled trials on the use of MBIs in chronic pain management, only a few studies were found that demonstrated significant effects on pain intensity, quality of life, as well as physical and psychological functioning. Therefore, the current evidence is mixed and there are insufficient data to definitively confirm the full impact of the use of MBIs in chronic pain conditions such as fibromyalgia, chronic low back pain, rheumatoid arthritis, and chronic musculoskeletal pain. The lack of compelling evidence at this time signals a demand for higher quality investigations in this area. Research examining MBIs and concomitant CBT may be of great value in order to synergize and strengthen patient outcomes.
Restricted selection and effective population size
RP Wei
Genetics Selection Evolution , 1996, DOI: 10.1186/1297-9686-28-3-237
Effects of Television and Radio on Speaking and Writing Skills of Senior Secondary School Students in Jos Metropolis
RP Gowon
African Research Review , 2009,
Abstract: Parents, school authorities and members of the public have been concerned about the pervasive and powerful nature of the broadcast media to attract the youths, the much time they spend with the media as opposed to the little time they spend in their studies. Their concern arises from the noting that these could become powerful distractors to structured learning, despite their positive contributions to the dissemination of information. This scenario coupled with the poor speaking and writing among Nigerian youths necessitated this research efforts. Results of findings indicate that both television and radio have a positive influence on speaking skills of students, but no effect was indicated on their writing skills. The findings were interpreted in terms of what teachers could do to use the TV and radio to promote the development of spoken and written English.
Deterministic modeling and evaluation of a virtual research laboratory by using Petri nets
RP Romansky
International Journal of Engineering, Science and Technology , 2011,
Abstract: The purpose of the virtual laboratory is to propose an intellectual space for organization of the on-line work in specialized field of knowledge. The research presented in this paper is linked with the research carried out within the frame work of a two year scientific project. The main goal of the project team is to develop a Virtual Research Laboratory (VRL) as a collection of relatively independent distributed virtual mediums, search machine, software instruments and tools for specific research organization in the field of the modern electronic and computer technologies. The life cycle models for software development propose a system investigation and evaluation by using suitable apparatus to determine the adequate structural organization during the phase of the architectural design. In this reason, the goal of this paper is to present an investigation of the defined architecture by using the asynchronous apparatus of Petri Nets (PN) as a second phase of the project work concerning the VRL development. The PN model defining and the carried out research are based on the results obtained during the first phase of the project work – conceptual model defining, formalization, preliminary evaluation and general architecture building. The formal description is based on the fact that each process of the information servicing in the virtual environment could be treated as a sequence of events (states) that generates requests for access to different information resources (relations) via Internet. This formal description permits to make a deterministic model of the information service as a sequence of active events and transactions between them that could be realized by the asynchronous PN apparatus. The defined PN-model describes the evaluated object as a sequence of events (presented by transactions) that could be realized if all related conditions (presented by input places) are fulfilled. In this reason the PN model describes the information servicing in the evaluated VRL as a collection of transactions and position with defined relations between them. Some important experimental results and assessments are discussed.
Print Media and ICT Access and Use among Female Academics in University of Jos, Nigeria
RP Gowon
African Research Review , 2010,
Abstract: Literacy for women in the academics requires constant access and use of current and quality information from the media and their associated technologies. This paper discusses the challenges to functional literacy for women academics in the University of Jos and explains how their academic literacy can be enhanced to bring about their empowerment in the system
Optimal therapeutic strategy for treating patients with hypertension and atherosclerosis: focus on olmesartan medoxomil
Mason RP
Vascular Health and Risk Management , 2011, DOI: http://dx.doi.org/10.2147/VHRM.S20737
Abstract: imal therapeutic strategy for treating patients with hypertension and atherosclerosis: focus on olmesartan medoxomil Review (5998) Total Article Views Authors: Mason RP Published Date June 2011 Volume 2011:7 Pages 405 - 416 DOI: http://dx.doi.org/10.2147/VHRM.S20737 R Preston Mason Cardiovascular Division, Brigham and Women’s Hospital, Harvard Medical School, Boston, MA, and Elucida Research, Beverly, MA, USA Abstract: Cardiovascular (CV) disease is a major factor in mortality rates around the world and contributes to more than one-third of deaths in the US. The underlying cause of CV disease is atherosclerosis, a chronic inflammatory process that is clinically manifested as coronary artery disease, carotid artery disease, or peripheral artery disease. It has been predicted that atherosclerosis will be the primary cause of death in the world by 2020. Consequently, developing a treatment regimen that can slow or even reverse the atherosclerotic process is imperative. Atherogenesis is initiated by endothelial injury due to oxidative stress associated with CV risk factors including diabetes mellitus, hypertension, cigarette smoking, dyslipidemia, obesity, and metabolic syndrome. Since the renin–angiotensin–aldosterone system (RAAS) plays a key role in vascular inflammatory responses, hypertension treatment with RAAS-blocking agents (angiotensin-converting enzyme inhibitors [ACEIs] and angiotensin II receptor blockers [ARBs]) may slow inflammatory processes and disease progression. Reduced nitric oxide (NO) bioavailability has an important role in the process of endothelial dysfunction and hypertension. Therefore, agents that increase NO and decrease oxidative stress, such as ARBs and ACEIs, may interfere with atherosclerosis. Studies show that angiotensin II type 1 receptor antagonism with an ARB improves endothelial function and reduces atherogenesis. In patients with hypertension, the ARB olmesartan medoxomil provides effective blood pressure lowering, with inflammatory marker studies demonstrating significant RAAS suppression. Several prospective, randomized studies show vascular benefits with olmesartan medoxomil: reduced progression of coronary atherosclerosis in patients with stable angina pectoris (OLIVUS); decreased vascular inflammatory markers in patients with hypertension and micro- (pre-clinical) inflammation (EUTOPIA); improved common carotid intima-media thickness and plaque volume in patients with diagnosed atherosclerosis (MORE); and resistance vessel remodeling in patients with stage 1 hypertension (VIOS). Although CV outcomes were not assessed in these studies, the observed benefits in surrogate endpoints of disease suggest that RAAS suppression with olmesartan medoxomil may potentially have beneficial effects on CV outcomes in these patient populations.
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