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Search Results: 1 - 10 of 10227 matches for " Charles Roncin "
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Factor structure and internal consistency of the 12-item General Health Questionnaire (GHQ-12) and the Subjective Vitality Scale (VS), and the relationship between them: a study from France
Mare? Salama-Younes, Ali Montazeri, Amany Isma?l, Charles Roncin
Health and Quality of Life Outcomes , 2009, DOI: 10.1186/1477-7525-7-22
Abstract: Using a standard 'forward-backward' translation procedure, the English language versions of the two instruments (i.e. the 12-item General Health Questionnaire and the Subjective Vitality Scale) were translated into French. A sample of adults aged 58–72 years then completed both questionnaires. Internal consistency was assessed by Cronbach's alpha coefficient. The factor structures of the two instruments were extracted by confirmatory factor analysis (CFA). Finally, the relationship between the two instruments was assessed by correlation analysis.In all, 217 elderly adults participated in the study. The mean age of the respondents was 61.7 (SD = 6.2) years. The mean GHQ-12 score was 17.4 (SD = 8.0), and analysis showed satisfactory internal consistency (Cronbach's alpha coefficient = 0.78). The mean VS score was 22.4 (SD = 7.4) and its internal consistency was found to be good (Cronbach's alpha coefficient = 0.83). While CFA showed that the VS was uni-dimensional, analysis for the GHQ-12 demonstrated a good fit not only to the two-factor model (positive vs. negative items) but also to a three-factor model. As expected, there was a strong and significant negative correlation between the GHQ-12 and the VS (r = -0.71, P < 0.001).The results showed that the French versions of the 12-item General Health Questionnaire (GHQ-12) and the Subjective Vitality Scale (VS) are reliable measures of psychological distress and vitality. They also confirm a significant negative correlation between these two instruments, lending support to their convergent validity in an elderly French population. The findings indicate that both measures have good structural characteristics.The General Health Questionnaire (GHQ) was developed in England as a screening instrument to identify psychological distress in primary care settings [1]. It was originally designed as a 60-item instrument but several shortened versions are currently available, including the GHQ-30, the GHQ-28, the GHQ-20 and the GH
Simulation Du Comportement Dynamique Du Voilier
Kostia Roncin
Physics , 2010,
Abstract: A simulator of two sailing boats in interaction is being made in order to provide sportsmen with a reliable analytical tool. We presently describe different models we used. Stationary hydrodynamics efforts have been specially evaluated. Experiences plan method has been implemented to exploit the towing tank tests made in the Fluids Mechanic Laboratory of Ecole Centrale de Nantes. Here are set out partial results of the model we achieved. At last, a simulator example illustrates the possibilities provided.
Image processing for grazing incidence fast atom diffraction: the $β_2$(2x4) reconstruction of the GaAs(001) surface
Maxime Debiossac,Philippe Roncin
Physics , 2015,
Abstract: Grazing incidence fast atom diffraction (GIFAD, or FAD) has developed as a very sensitive technique most suited for well ordered crystalline surfaces. Such high quality surfaces are routinely fabricated in molecular beam epitaxy (MBE) chamber and a GIFAD setup has been installed allowing in situ operation. Focusing here on static condition, i.e. before or after the growth process, the paper describes in details the few steps needed to measure the relative intensities of the diffraction spots. Care is taken to outline the underlying physical assumptions.
Atom beam triangulation of organic layers at 100 meV normal energy: self-assembled perylene on Ag(110) at room temperature
Nataliya Kalashnyk,Philippe Roncin
Physics , 2015,
Abstract: The controlled growth of organic layer on surface is still awaiting for an on-line reliable monitoring that would allow improvement of its quality. We show here that the self-assembly of the perylene monolayer deposited on Ag(110) at room temperature can be tracked with low energy atoms in a regime where the energy perpendicular to the layer is less than 0.1 eV preventing damage to the layer. The image processing required for this triangulation technique with atoms is described in details.
Simulation dynamique du voilier
Kostia Roncin,Jean-Michel Kobus
Physics , 2010,
Abstract: A sailing simulator has been developed from a new point of view. It will rather be for the sailor to use it than for the architect. One boat which characteristics were already known has been chosen. The whole coupled mechanic equations system has been solved. Heave and pitch equations, usually neglected, have been introduced to evaluate each trim of the crew and provide an optimal ride analysis tool. In this paper, efforts models and their determination's method are briefly presented. A tack simulation is shown as a brief overview on the simulator possibilities.
Diffraction of fast atoms and molecules from surfaces
J. R. Manson,Hocine Khemliche,Philippe Roncin
Physics , 2008,
Abstract: Prompted by recent experimental developments, a theory of surface scattering of fast atoms at grazing incidence is developed. The theory gives rise to a quantum mechanical limit for ordered surfaces that describes coherent diffraction peaks whose thermal attenuation is governed by a Debye-Waller factor, however, this Debye-Waller factor has values much larger than would be calculated using simple models. A classical limit for incoherent scattering is obtained for high energies and temperatures. Between these limiting classical and quantum cases is another regime in which diffraction features appear that are broadened by the motion in the fast direction of the scattered beam but whose intensity is not governed by a Debye-Waller factor. All of these limits appear to be accessible within the range of currently available experimental conditions.
Une Chaine de Mesure Permettant de Caracteriser la Performance en Voile
Paul Iachkine,Sophie Barré,Kostia Roncin,Jean-Michel Kobus
Physics , 2010,
Abstract: This paper presents the experimental set-up and the analysis tools developed for the performance evaluation in sailing. The measurement system is composed of sensors for the position and attitude of the sail boat, sensors for the wind measurement and some tools for the coach.
Efficacy of a synbiotic chewable tablet in the prevention of antibiotic-associated diarrhea  [PDF]
Charles Spielholz
Health (Health) , 2011, DOI: 10.4236/health.2011.32020
Abstract: Infection by Clostridium difficile, a complication of treatment with antibiotics, causes antibiotic- associated diarrhea (AAD) and can lead to colitis and pseudomembranous colitis. Incidence of C. difficile infection is increasing among the elderly undergoing antibiotics therapy confined to health care facilities, conditions that are expensive to treat, decrease the quality of life and are life threatening. Use of probiotics has been proposed as a method to decrease the incidence of AAD in health care facilities. To examine the efficacy of using probiotics, 120 nursing home residents undergoing antibiotic therapy were provided with a synbiotic tablet containing two probiotics, Saccharomyces boulardii and Bacillus coagulans, and a prebiotic, fructooligosaccharide. Residents were evaluated retrospectively for AAD and C. difficile infection. It was found that 95% of residents treated with antibiotics and taking the synbiotic tablet were free of AAD. More than 97% of the residents did not become infected with C. difficile. No adverse effects were reported. Minor side effects, gastrointestinal upset and nausea, were reported by less than 6% of the residents. The cause of the minor side effects was not known. Only 2.5% of the residents stopped taking the synbiotic tablet because of the gastrointestinal upset. These Results suggest that use of the synbiotic tablet prevents AAD and C. difficile infection in nursing home residents undergoing antibiotic therapy. It is concluded that this synbiotic tablet provides an easy to administer and safe approach to controlling AAD and C. difficile infection in residents in nursing homes.
Towards a Global Carbon Integrity System: Learning from the GFC1 and avoiding a GCC2  [PDF]
Charles Sampford
Low Carbon Economy (LCE) , 2011, DOI: 10.4236/lce.2011.24026
Abstract: This paper examines some of the central globalethical and governance challenges of climate change and carbon emissions reduction in relation to globalization, the ‘global financial crisis’ (GFC), and unsustainable conceptions of the ‘good life’,and argues in favour ofthe development of a global carbon ‘integrity system’. It is argued that a fundamental driver of our climate problems is the incipient spread of an unsustainable Western version of the ‘good life’, whereresource-intensive, high-carbon western lifestyles,although frequently criticized as unsustainable and deeply unsatisfying, appear to have established anunearned ethical legitimacy.While the ultimate solution to climate change is the development of low carbon lifestyles, the paper argues that it is also important that economic incentives support and stimulate that search: the sustainable versions of the good life provide an ethical pull, whilst the incentives provide an economic push. Yet, if we are going to secure sustainable low carbon lifestyles, it is argued, we need more than the ethical pull and the economic push. Each needs to be institutionalized – built into the governance of global, regional, national, sub-regional, corporate and professional institutions. Where currently weakness in each exacerbates the weaknesses in others,it is argued that governance reform is required in all areas supporting sustainable, low carbon versions of the good life.
Belief Structures, Common Policy Space and Health Care Reform: A Q Methodology Study  [PDF]
Charles Wilf
Psychology (PSYCH) , 2011, DOI: 10.4236/psych.2011.29143
Abstract: Debate on the merits of health care reform continues even after passage of the Affordable Care Act of 2010. Poll results confirm a split along political party and associated ideological lines with democrats more supportive and republicans generally opposed to the law. As parts of the law are now subject to increasing scrutiny, it may be instructive to question whether a party-centered or surrogate liberal/conservative dichotomy is the best representation of positions in the health care debate. Q Methodology reveals a more complex set of belief structures, suggesting that a simple dichotomy is misleading in terms of the values that underlie the role of health care in society. Five distinct belief structures were found, each with different concerns as to the purpose and potential benefits of various health care initiatives. In addition, Q Methodology allows for the formation of a common policy space within which all belief structures are independently in agreement in four specific areas. It is argued that this empirically derived consensus can serve as a basis for effective political engagement and policy implementation.
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