Superhydrophilicity on nano-rough carbon surfaces achieved by hyperthermal oxygen-atom beam exposure

In order to investigate a method to increase hydrophilicity on nano-rough carbon surfaces, a nano-rough surface of C(60) film and an atomically flat surface of highly oriented pyrolytic graphite (HOPG) were oxidized by hyperthermal oxygen-atom beam exposure and the hydrophilicities of the surfaces were investigated. Superhydrophilicity were achieved on these exposed carbon surfaces, which had low O/C ratio of approximately 28% and surface roughness (Ra) of approximately 3 nm. The direct oxidations on sp(2) bonded carbon atoms (basal plane) of these two carbon materials by the exposure of hyperthermal O-atom beam would contribute the superhydrophilicity

Hydroxyapatite-TiO2-SiO2-Coated 316L Stainless Steel for Biomedical Application

This study investigated the effectiveness of titania (TiO2) as a reinforcing phase in the hydroxyapatite (HAP) coating and silica (SiO2) single-layer as a bond coat between the TiO2-reinforced hydroxyapatite (TiO2/HAP) top layer and 316L stainless steel (316L SS) substrate on the corrosion resistance and mechanical properties of the underlying 316L SS metallic implant. Single-layer of SiO2 film was first deposited on 316L SS substrate and studied separately. Water contact angle measurements, X-ray photoelectron spectroscopy (XPS) and Fourier transform infrared (FTIR) spectrophotometer analysis were used to evaluate the hydroxyl group reactivity at the SiO2 outer surface. The microstructural and morphological results showed that the reinforcement of HAP coating with TiO2 and SiO2 reduced the crystallite size and the roughness surface. Indeed, the deposition of 50 vol. % TiO2-reinforced hydroxyapatite layer enhanced the hardness and the elastic modulus of the HAP coating, the introduction of SiO2 inner-layer on the surface of the 316L SS allowed the improvement of the bonding strength and the corrosion resistance as confirmed by scratch studies, nanoindentation and cyclic voltammetry tests

Coaching and Mentoring System for Educational Service Areas

New paradigm of education reform focused on how educator changes their thinking and behavior to school practices. Coaching and Mentoring are widely used in the schools and educational institutions. The purposes of this research aimed to study in coaching and mentoring components for educator; to study needs for developing coaching and mentoring system; and to develop coaching and mentoring system for educators. Research and development was employed, needs assessment was the first phase to find out necessary information for developing system. Then, phase 2 developed a tentative system and verified to authentic system by 9 experts in the field of education. Final, system implementation was conducted to investigate effective system with educators worked for the educator in educational service area office. The findings showed that 7 components of coaching and mentoring for educators i.e., contexts in changes, human relations, individual plan, guidance and counseling, role model, leadership, and working reflection. The system implementation explored that panel participants had their satisfaction on contents, process, environment, materials, and system at highest level. Utility, possibility, and appropriateness of coaching and mentoring system in the authentic situation was highest level

Five-year clinical outcomes of Crohn’s disease: a report of 287 multiethnic cases from an International Hospital in Thailand

Vibhakorn Permpoon,1 Krit Pongpirul,2–4 Sinn Anuras11Digestive Disease Center, Bumrungrad International Hospital, Bangkok, Thailand; 2Department of Preventive and Social Medicine, Faculty of Medicine, Chulalongkorn University, Bangkok, Thailand; 3Department of International Health, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA; 4Bumrungrad Research Center, Bumrungrad International Hospital, Bangkok, ThailandBackground: Crohn’s disease (CD) has been relatively rare in Asian region whereas its clinical outcomes have been dominated by evidence from Caucasians in developed countries. This study reported clinical characteristics and outcomes of the multiethnic patients who visited our institution.Materials and methods: Medical records of all patients who visited our institution during 2005–2010 were reviewed. Colonoscopy and sigmoidoscopy were performed in compliance with the ASGE guidelines.Results: A total of 287 CD patients were followed up for 5.65 years on average: 41.80% Middle Eastern (ME), 29.62% Caucasian, 28.57% Asian. ME and Caucasian had higher CD prevalence than Asian (286.71, 278.66, and 43.10 per 100,000 population, respectively). Significant variation in male proportion was observed (p=0.001): 39.02% Asian, 65.83% ME, 68.24% Caucasian. The mean age was 39.46 years (ME 32.88, Asian 43.35, Caucasian 45.00; p<0.001). ME had alonger duration of symptoms (26.55 months) than Caucasian (11.98 months) and Asian (12.35 months) (p=0.0008). The proportions of perianal lesions were statistically different across ethnic origins (p=0.014): 9.76% Asian, 24.17% ME and 12.94% Caucasian. Caucasian was severely active, compared with ME (10.83%) and Asian (6.10%). Disease progression existed in 88 of 254 patients who initially had non-severe pathology: 19.63% ME, 40% Caucasian, 50.65% Asian (p<0.0001). Clinical improvement was observed in 82% of the patients. Seventy-five patients required either surgery or hospitalization with a significant ethnic variation: 37.65% Caucasian, 28.33% ME, 10.98% Asian (p<0.0001).Conclusions: Crohn’s disease prevalence, gender, age, duration of symptoms, perianal lesion, pathological severity and disease progression varied across ethnic origins.Keywords: Crohn’s Disease, ethnic groups, anatomical pathological conditions, medical tourism, retrospective studie

ASIAN MONETARY COOPERATION: PERSPECTIVES FROM THE OPTIMUM CURRENCY AREA ANALYSIS

We argue that a number of recent studies have overstated the economic case for the creation of a common Asian currency by focusing on only a few of the relevant criteria. We also conclude that endogenous forces are unlikely to be sufficiently strong that adopting a common currency would quickly turn Asia into an optimum currency area (OCA) as some have suggested. We argue that more attention needs to be devoted to issues of monetary, fiscal, and exchange rate coordination under a fairly flexible exchange rate system and that OCA analysis is a valuable framework for analyzing such issues.Asian monetary integration, OCA

Endogenous OCA (Optimum Currency Area) Analysis and the Early Euro Experience

Some have argued that the endogenous responses to the formation of a currency area are so strong that one need not worry about optimum currency area conditions ex ante. We argue that this is much too strong a conclusion. We draw on a number of recent studies to evaluate the endogeneity experiences of the eurozone in three major areas; trade flows, business cycle synchronisation and structural reforms to improve labour and product market flexibility. Simple before-and-after comparisons are insufficient for analysis of endogeneity. The experiences of non-euro Western European economies suggest that broader trends also had considerable influence on trade and business cycle patterns. While trade rose substantially within the eurozone, it also rose with and among other European economies. We argue that political economy considerations tend to dampen the magnitude of endogeneity efforts on structural reforms and that meeting conditions for entry may be a more powerful mechanism in this than are subsequent endogenous responses. We also discuss a number of areas for further research

Endogenous OCA Analysis and the Early Euro Experience

Abstract Some have argued that the endogenous responses to the formation of a currency area are so strong that one need not worry about optimum currency area conditions ex ante. We argue that this is much too strong a conclusion. We draw on a number of recent studies to evaluate the endogeneity experiences of the eurozone in three major areas; trade flows, business cycle synchronisation and structural reforms to improve labour and product market flexibility. Simple before-and-after comparisons are insufficient for analysis of endogeneity. The experiences of non-euro Western European economies suggest that broader trends also had considerable influence on trade and business cycle patterns. While trade rose substantially within the eurozone, it also rose with and among other European economies. We argue that political economy considerations tend to dampen the magnitude of endogeneity efforts on structural reforms and that meeting conditions for entry may be a more powerful mechanism in this than are subsequent endogenous responses. We also discuss a number of areas for further research. Copyright 2010 Blackwell Publishing Ltd.

Influence of physico-structural properties on the photocatalytic activity of sol-gel derived TiO2 thin film

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