Background: The use of standing desks has been associated with greater metabolic cost as compared to traditional seated desks. However, it is unclear as to the metabolic impact of standing desks in normal weight versu...Background: The use of standing desks has been associated with greater metabolic cost as compared to traditional seated desks. However, it is unclear as to the metabolic impact of standing desks in normal weight versus obese men and women. Methods: We compared the metabolic cost of using a standing and seated desk in 14 obese and 19 normal weight men and women. Subjects reported to the lab on a single occasion and participated in two, 30-minute sessions of standing and seated desk work (i.e., typing), in random order. Expired gases were collected during the 2-hour period and calorie expenditure was estimated using indirect calorimetry. Results: We noted a significant (p = 0.013) increase in energy expenditure of 7.4 kcal•30 minutes−1 (+14.7%) during standing as compared to seated for the obese group. No significant difference in energy expenditure was noted for the normal weight group (p = 0.674). A condition effect was noted for heart rate and diastolic blood pressure, with standing being significantly higher than seated for both variables (p 0.05). Conclusion: The use of a standing desk modestly increases energy expenditure in obese subjects but does not have the same effect in those of normal weight. It is unknown whether the increased energy expenditure would be maintained over time in the obese subjects/individuals, as they may adapt to the standing position. Moreover, if normal weight individuals choose a standing desk, they should do so for reasons unrelated to increased energy expenditure (e.g., improved spine health, greater feeling of productivity).展开更多
文章通过分析教科版小学英语三年级《Put it on the desk》教学案例,来记录并说明薄弱学校在英语教学中使用基于移动终端的翻转课堂模式的教学效果,同时记录相关知识点的微课设计和课堂设计,旨在求教于方家,并为诸位教师同仁提供一些思...文章通过分析教科版小学英语三年级《Put it on the desk》教学案例,来记录并说明薄弱学校在英语教学中使用基于移动终端的翻转课堂模式的教学效果,同时记录相关知识点的微课设计和课堂设计,旨在求教于方家,并为诸位教师同仁提供一些思路和借鉴.展开更多
This paper presents an automatic computer table based on STC89C52 MCU, the height and angle of the desk can be adjusted by MCU. The computer desk can also be connected with the Bluetooth of the mobile phone through th...This paper presents an automatic computer table based on STC89C52 MCU, the height and angle of the desk can be adjusted by MCU. The computer desk can also be connected with the Bluetooth of the mobile phone through the MCU to realize the wireless remote control and adjust the height and the angle of the display screen of the computer desk. According to man-machine engineering, the design can meet the needs of different adult populations for computer display height and angle requirements. The design of the computer desk can meet the daily needs of people in the office, and can effectively reduce the pain of cervical spondylosis, lumbar pain and other symptoms, which are caused by long working hours. The computer desk can improve work efficiency, strong practicability, high performance price ratio.展开更多
The incidences of nosocomial infections(NIs)are increasing throughout the world,especially for those airborne diseases caused by pathogens or air particulates that float in air.In this study,we designed and manufactur...The incidences of nosocomial infections(NIs)are increasing throughout the world,especially for those airborne diseases caused by pathogens or air particulates that float in air.In this study,we designed and manufactured a desk for clinic consultation room air purification and air isolation between doctor and patient.The air isolation and purification(AIP)desk has a high efficiency particulate air(HEPA)filter on the tope and several primary efficiency filters on the sides for air purification.The air circulating between inlet and outlet forms a wind-curtain between doctor and patient.The Computational Fluid Dynamics(CFD)model was used to calculate the speed of the air flow and the angle of sampler.We tested the air purification function of the AIP desk in rooms sized about 3.6×2.8×2.8 m(L×W×H)and found that the AIP desk could significantly remove the tested air pollutants like smoke particulates and microorganisms like Staphylococcus albus(S.albus)and human adenovirus type 5(HAdV-5).The wind-curtain can significantly block the exhale air of patient being transmitted to the respiratory area of doctor setting in the opposite of AIP desk.Thus,the AIP desk can be used in hospital setting to reduce the risk of NIs and protect both doctors and patients.展开更多
文摘Background: The use of standing desks has been associated with greater metabolic cost as compared to traditional seated desks. However, it is unclear as to the metabolic impact of standing desks in normal weight versus obese men and women. Methods: We compared the metabolic cost of using a standing and seated desk in 14 obese and 19 normal weight men and women. Subjects reported to the lab on a single occasion and participated in two, 30-minute sessions of standing and seated desk work (i.e., typing), in random order. Expired gases were collected during the 2-hour period and calorie expenditure was estimated using indirect calorimetry. Results: We noted a significant (p = 0.013) increase in energy expenditure of 7.4 kcal•30 minutes−1 (+14.7%) during standing as compared to seated for the obese group. No significant difference in energy expenditure was noted for the normal weight group (p = 0.674). A condition effect was noted for heart rate and diastolic blood pressure, with standing being significantly higher than seated for both variables (p 0.05). Conclusion: The use of a standing desk modestly increases energy expenditure in obese subjects but does not have the same effect in those of normal weight. It is unknown whether the increased energy expenditure would be maintained over time in the obese subjects/individuals, as they may adapt to the standing position. Moreover, if normal weight individuals choose a standing desk, they should do so for reasons unrelated to increased energy expenditure (e.g., improved spine health, greater feeling of productivity).
基金Supported by Hefei University of Technology Students’Entrepreneurship Practice Project(2015CXCY066)
文摘This paper presents an automatic computer table based on STC89C52 MCU, the height and angle of the desk can be adjusted by MCU. The computer desk can also be connected with the Bluetooth of the mobile phone through the MCU to realize the wireless remote control and adjust the height and the angle of the display screen of the computer desk. According to man-machine engineering, the design can meet the needs of different adult populations for computer display height and angle requirements. The design of the computer desk can meet the daily needs of people in the office, and can effectively reduce the pain of cervical spondylosis, lumbar pain and other symptoms, which are caused by long working hours. The computer desk can improve work efficiency, strong practicability, high performance price ratio.
基金supported by grants from National Key Research and Development Program of China(2018YFC1200100 and 2020YFC0842400)Guangdong Medical Science and Technology Research Center Project(A2019460)+5 种基金Entrepreneurship Leadership Project in Guangzhou Development Zone of China(CY2018-003)Guangzhou Science and Technology Project(202008040002)Scientific Research Project of Guangdong Province Traditional Chinese Medicine Bureau(20201191)Innovative and Strong School Project of Guangdong Provincial Department of Education(2020KZDZX1122)Guangdong Science and Technology Project(2020B111106001)Foshan Science and Technology Innovation Project(2020001000416).
文摘The incidences of nosocomial infections(NIs)are increasing throughout the world,especially for those airborne diseases caused by pathogens or air particulates that float in air.In this study,we designed and manufactured a desk for clinic consultation room air purification and air isolation between doctor and patient.The air isolation and purification(AIP)desk has a high efficiency particulate air(HEPA)filter on the tope and several primary efficiency filters on the sides for air purification.The air circulating between inlet and outlet forms a wind-curtain between doctor and patient.The Computational Fluid Dynamics(CFD)model was used to calculate the speed of the air flow and the angle of sampler.We tested the air purification function of the AIP desk in rooms sized about 3.6×2.8×2.8 m(L×W×H)and found that the AIP desk could significantly remove the tested air pollutants like smoke particulates and microorganisms like Staphylococcus albus(S.albus)and human adenovirus type 5(HAdV-5).The wind-curtain can significantly block the exhale air of patient being transmitted to the respiratory area of doctor setting in the opposite of AIP desk.Thus,the AIP desk can be used in hospital setting to reduce the risk of NIs and protect both doctors and patients.
