Asia-Pacific Journal of Science and Technology最新文献_第8页

Prediction Equations for Maximum Aerobic Capacity Using Cardiopulmonary Exercise Testing Among Thais 泰国人心肺运动试验中最大有氧能力的预测方程

Asia-Pacific Journal of Science and Technology Pub Date : 2015-12-18 DOI: 10.14456/KKURJ.2015.37

et.al Tichanon Promsrisuk

{"title":"Prediction Equations for Maximum Aerobic Capacity Using Cardiopulmonary Exercise Testing Among Thais","authors":"et.al Tichanon Promsrisuk","doi":"10.14456/KKURJ.2015.37","DOIUrl":"https://doi.org/10.14456/KKURJ.2015.37","url":null,"abstract":"Maximum aerobic capacity is the most important parameter of cardiopulmonary fitness and an independent parameter for cardiovascular and respiratory disease prognosis. Prediction equations for varies with age, gender, body size, level of ordinary activity, type of exercise and races. Those equations have never been studied in Thais. This study aimed to provide prediction equations for in Thai males and females and to evaluate associations between age, weight and height, and . The maximum aerobic capacity was analysed in 44 healthy Thai subjects (20 males and 24 females; aged 20 – 50 years) who underwent cardiopulmonary exercise testing (CPET) using a treadmill and an incremental protocol until symptom limitation. All subjects had normal ranges of clinical characteristics and pulmonary function except those of weight and height in males were higher than in females (p<0.001) while age in males was lower than in females (p<0.05). Predictive equations for were obtained from multiple linear regression analysis and significant correlations demonstrated a negative correlation between and age (p<0.05), and positive correlations between and weight and height (p<0.001). The prediction equation: = 3222.9 + (792.4 * sex) + (-11.3 * age) + (21.0 * weight) + (-15.7 * height) (R 2 = 0.72, SEE=308.5 ml/min) (1 = male, 0 = female; age in years (yr); weight in kilograms (kg); height in centimeters (cm)). In addition, in males was significantly higher than in females by 59% (p<0.001). The present study provides the prediction equation for applicable to the Thai population. Nonetheless, it is compulsory to have more sets of normal values to be accumulated so that reference values can be established in the future. We also demonstrate that males have higher than those of females.","PeriodicalId":8597,"journal":{"name":"Asia-Pacific Journal of Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2015-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66675883","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Heat transfer and fluid flow behavior of air in square duct heat exchanger inserted with v-downstream winglet turbulators 插入v-下游小翼紊流器的方管换热器内空气的传热与流动特性

Asia-Pacific Journal of Science and Technology Pub Date : 2015-12-18 DOI: 10.14456/KKURJ.2015.33

et.al Suriya Chokphoemphun

{"title":"Heat transfer and fluid flow behavior of air in square duct heat exchanger inserted with v-downstream winglet turbulators","authors":"et.al Suriya Chokphoemphun","doi":"10.14456/KKURJ.2015.33","DOIUrl":"https://doi.org/10.14456/KKURJ.2015.33","url":null,"abstract":"This work present the experimental investigation on heat transfer enhancement and thermal performance in a square-duct heat exchanger inserted with 45o V-downstream winglet turbulator is carried out by varying velocity of air in the turbulent regime for Reynolds numbers (Re) ranging from 4000 to 26,000 in the test section with a constant wall heat flux condition. Influents of four different pitch lengths; P=22.5, 33.75, 45 and 90 mm (PR=P/H=0.5, 0.75, 1 and 2) and three different winglet heights, e=6.75, 9 and 11.25 mm (BR=e/H=0.15, 0.2 and 0.25) were inserted diagonally and placed in the core flow area into the test duct on heat transfer rates in the term of Nusselt number (Nu), pressure loss in form of friction factor (f) and thermal performance (). It was found that the 45o V-downstream winglet is provided the Nu and f higher than the smooth surface around 6.0 to 8.7 times and 37 to 170 times, respectively depending upon operating conditions while the thermal performance are about 1.50–2.06. The maximum thermal performance for using 45o V-downstream winglet turbulator is 2.06 at Re=4100, BR=0.2 and PR=1.0 in this experiment.","PeriodicalId":8597,"journal":{"name":"Asia-Pacific Journal of Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2015-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66675828","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Optimal Parameters in Precipitation Hardening of 6061 Aluminium Alloy Using Box-Behnken Design 用Box-Behnken设计优化6061铝合金沉淀硬化参数

Asia-Pacific Journal of Science and Technology Pub Date : 2015-12-18 DOI: 10.14456/KKURJ.2015.31

Somsak Kaewploy

{"title":"Optimal Parameters in Precipitation Hardening of 6061 Aluminium Alloy Using Box-Behnken Design","authors":"Somsak Kaewploy","doi":"10.14456/KKURJ.2015.31","DOIUrl":"https://doi.org/10.14456/KKURJ.2015.31","url":null,"abstract":"Precipitation hardening process is important to increase the hardness of 6061 aluminium alloy. In order to achieve the desired hardness, this process has several controlled parameters including solution soaking temperature, solution soaking time, aging temperature and aging time. The identification of each appropriate parameter is important in the precipitation hardening process of aluminium alloy. Because there has been no method or exact pattern, therefore this research work applies the response surface methodology with Box-Behnken design to determine these appropriate parameters. The experimental result is found that there are three factors significantly affecting on the hardness obtained from the precipitation hardening process. The experimental data is well fit a quadratic model due to high coefficient of determination (R2=0.92). When this regression model is taken to construct the three-dimensional surface response plot and the contour plot, it is found that the optimum condition is the solution treatment time of 5 hours and 18 minutes, aging temperature of 181C and the aging time of 10 hours which yield the maximum predicted Vicker hardness of 132.5 HV.","PeriodicalId":8597,"journal":{"name":"Asia-Pacific Journal of Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2015-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66675810","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The association of HLA and systemic sclerosis (SSc) in the northeastern Thais. 泰国东北部人HLA与系统性硬化症(SSc)的关系

Asia-Pacific Journal of Science and Technology Pub Date : 2015-12-18 DOI: 10.14456/kkurj.2015.38

A. Mahakkanukrauh

{"title":"The association of HLA and systemic sclerosis (SSc) in the northeastern Thais.","authors":"A. Mahakkanukrauh","doi":"10.14456/kkurj.2015.38","DOIUrl":"https://doi.org/10.14456/kkurj.2015.38","url":null,"abstract":"Aim: The majority of Thai SSc patients represent a unique ethnic group found in Northeastern Thailand. Genetic susceptibility may be found in the pathogenesis of Thai SSc patients. This study aims to identify HLA genes which correlate with clinical profiles in these SSc patients. Methods : Peripheral blood samples were taken from 60 SSc patients diagnosed using the ACR classification 1980 criteria. HLA-A, -B, and -C were analyzed using the PCR-amplification refractory mutation system, and the PCR-sequence specific primer was used for the HLA-DR and- DQ analysis. The distribution of the alleles between SSc patients and the control was found to be significant when it was tested with the corrected P value (<0.05). Results : Of the 60 SSc patients examined; 66.7% displayed symptoms of diffuse cutaneous SSc (dcSSc), and 33.3% showed limited cutaneous SSc (lcSSc). In the Thai SSc group, the prevalence of HLA DRB1*1502 (allele frequency: AF = 32.5%) and DQB1*0501 (AF = 30.8%) which was significantly higher when compared to the control group (AF = 18.5% and 16.3%) with corrected P value (Pc) = 0.0007 and 0.0001, respectively. Conclusions : The majority of Thai SSc patients that actually displayed dcSSc, had a high prevalence of internal organ involvement. The results suggest a genetic susceptibility for SSc among the population of Northeastern Thailand, especially for individuals with HLA DRB1*1502. In the West, there is less HLA DRB1*1502, and this factor could explain why dcSSc is more prevalent among the Thai population.","PeriodicalId":8597,"journal":{"name":"Asia-Pacific Journal of Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2015-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66675892","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Core Stabilization Exercise and Movement System Impairment Approaches for Patients with Movement Control Impairment: A Review Article 运动控制障碍患者的核心稳定训练和运动系统损伤方法:综述文章

Asia-Pacific Journal of Science and Technology Pub Date : 2015-12-18 DOI: 10.14456/KKURJ.2015.40

Peemongkon Wattananona

{"title":"Core Stabilization Exercise and Movement System Impairment Approaches for Patients with Movement Control Impairment: A Review Article","authors":"Peemongkon Wattananona","doi":"10.14456/KKURJ.2015.40","DOIUrl":"https://doi.org/10.14456/KKURJ.2015.40","url":null,"abstract":"Treatment-based and movement system impairment-based classifications have been widely used to identify movement control impairment (MCI) in patients with non-specific low back pain. Clinical observation of aberrant movement patterns is an essential aspect of the examination to identify patients with MCI. The treatment of these patients is a therapeutic exercise that involves static and dynamic stability of core stabilizing muscles. Although exercise prescriptions for these patients are similar, intervention may vary based upon its concept. Interventions include the core stabilization exercise (CSE) approach based upon stabilizing system model, and movement system impairment (MSI) approach based upon kinesiopathologic model. CSE focuses on neuromuscular function to compensate for impairment of intervertebral disc and joints, whereas MSI emphasizes movement correction and enhances movement efficiency to prevent injury and impairment. Both approaches seem equally effective in reducing pain and disability for the MCI group. Therefore, clinicians can utilize either approach for rehabilitating patients with MCI. However, if differences in effectiveness are found when utilizing these different approaches we should explore if the MCI classification needs further definition. In addition, further study needs to investigate the underlying mechanisms in patients with MCI, and the ability of each approach to change those mechanisms.","PeriodicalId":8597,"journal":{"name":"Asia-Pacific Journal of Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2015-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66675931","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Fungi on dragon fruit in Loei province, Thailand and the ability of bipolaris cactivora to cause post-harvest fruit rot 泰国洛伊省火龙果上的真菌及双星火龙果致采后果实腐烂的能力

Asia-Pacific Journal of Science and Technology Pub Date : 2015-11-18 DOI: 10.14456/KKURJ.2015.34

et.al Samoul Oeurn

引用次数: 11

Effects of temperatures on strength and deformability of Tak granite 温度对达克花岗岩强度和变形性能的影响

Asia-Pacific Journal of Science and Technology Pub Date : 2015-09-30 DOI: 10.14456/KKURJ.2015.22

et.al Kittikron Rodklang

引用次数: 5

Giant dielectric, low loss tangent and non-ohmics properties of CaCu3Ti4.7O12 ceramics prepared by polymer pyrolysis method 聚合物热解法制备cuu3ti4.7 o12陶瓷的大介电、低损耗正切和非欧姆性能

Asia-Pacific Journal of Science and Technology Pub Date : 2015-09-30 DOI: 10.14456/KKURJ.2015.29

et.al Sunan Nonglek

引用次数: 1

On approximating the minimum initial capital of fire insurance with the finite-time ruin probability using a simulation approach 用有限时间破产概率逼近火灾保险最小初始资本的模拟方法

Asia-Pacific Journal of Science and Technology Pub Date : 2015-09-30 DOI: 10.14456/KKURJ.2015.21

et.al Supawan Khotama

引用次数: 3

Calculation of structural and optical properties of silicon quantum dots: tuneable absorption energy and negative electron affinity 硅量子点结构和光学性质的计算:可调吸收能和负电子亲和

Asia-Pacific Journal of Science and Technology Pub Date : 2015-09-30 DOI: 10.14456/KKURJ.2015.23

et.al Ruhan Thirayathorn

{"title":"Calculation of structural and optical properties of silicon quantum dots: tuneable absorption energy and negative electron affinity","authors":"et.al Ruhan Thirayathorn","doi":"10.14456/KKURJ.2015.23","DOIUrl":"https://doi.org/10.14456/KKURJ.2015.23","url":null,"abstract":"The structural and optical properties of hydrogen-terminated silicon quantum dots were investigated by using the Gaussian 09 program. The models of silicon quantum dots assume that the silicon atoms are covalently bonded in diamond crystal structure, with quantum dot diameters varying from 0.8 to 1.6 nanometers. The bonds of silicon atoms at the surface were terminated by hydrogen atoms. The calculations of optimized structures and ground state electronic properties for the quantum dots have been performed using Hartree-Fock with 6-31G* basis set, and the exited states were then calculated by using time-dependent density functional theory (TDDFT) with (B3LYP) hybrid functional. The results show that the hydrogen-terminated silicon quantum dots have tuneable absorption energy, depending on particle size, and the larger particles have lower absorption energy. The calculated UV-VIS spectrum results show that with the quantum dots diameter changing from 0.8 nm to 1 nm to 1.2 nm the absorption peak moves from 5.23 eV (238 nm) to 4.68 eV (264 nm) to 4.03 eV (308 nm). Moreover, the hydrogen-capped silicon nanocrystals also show negative electron affinity (NEA).","PeriodicalId":8597,"journal":{"name":"Asia-Pacific Journal of Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2015-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66675619","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0