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( Syahrul Ridhwan ),( Asok Kumar Ghosh ),( Chen Chee Keong ) 체육과학연구원 2010 International Journal of Applied Sports Sciences Vol.22 No.2
The purpose of the present study was to determine the fractional utilisation of maximum oxygen uptake capacity (% VO2max) during execution of ground strokes and tennis match play. Ten male Malaysian state-level tennis players participated in this study. Age, height, weight and VO2max of the players were 15.3 + 1.2 years, 164.0 + 7.4 cm, 52.3 + 11.5 kg and 51.7 + 7.3 ml·kg-1·min-1 respectively. This study was conducted in 3 phases: laboratory test (Phase I), on-court test (Phase II) and simulated match (Phase III). Fraction of VO2max during execution of forehand and backhand strokes were 71.6 + 10.9% and 72.3 + 8.8% respectively, whereas tennis match play demanded 69.3 + 9.8% of VO2max. Execution of forehand and backhand strokes led to a blood lactate concentration of approximately 6 mmol·L-1, indicating the involvement of anaerobic glycolysis. On the other hand, due to the intermittent nature of the game and the work-rest ratio of 1:2.2, the post-match blood lactate was found to be 3.21 + 0.2 mmol·L-1, reflecting an aerobic dominance in the game. The mean match heart rate (154.3 + 15.4 beats·min-1) was lower than mean anaerobic threshold heart rate (164.7 + 5.7 beats·min-1), signifying a lower blood lactate level less than 4.0 mmol·L-1 in a tennis match. It This might be due to the fact that long rest pauses caused removal of blood lactate as well as recovery of heart rate. Video analysis of the matches revealed that the players executed more forehand strokes (P<0.001) than the backhand strokes. Since similar heart rate and VO2 responses were observed for forehand and backhand strokes, it is suggested that the players should train themselves equally on both ground strokes. During the longest rally, mean heart rate of the players was 174.9 + 3.1 beats·min-1, which corresponded to 84.5 + 2.2% of VO2max. In addition, rallies per game, mean rally duration and strokes per rally were found to be 5.7 + 2.4, 4.5 + 1.5 seconds and 2.8 + 0.8 shots, respectively. Hence, it is concluded that the Malaysian state-level tennis players possessed a moderately good aerobic capacity. This can be improved to the international standard through endurance and intermittent type of training. Improvement in VO2max may enhance the playing intensity of the match as well a better recovery in the rest pauses and also delay the onset of fatigue during a match. From video match analysis and heart rate VO2 relationship, it is suggested that the players should also improve the alactic anaerobic component through short bursts of repeated movements of 5-8 seconds durations.
Experimental Analysis of Cold-Formed Steel C-Sections with the Notch Subjected to Axial Compression
Mohd Syahrul Hisyam Mohd Sani,Fadhluhartini Muftah,Cher Siang Tan 대한토목학회 2020 KSCE JOURNAL OF CIVIL ENGINEERING Vol.24 No.4
Studies on the use of cold-formed steel (CFS) C-section, which is a civil engineering material, in building and civil engineering work are still on-going. The advantages of the CFS C-section are becoming so interesting that it is often being used as a roof truss system, storage rack, and wall framing. In order to have a roof truss system with a strong, safe, and stable condition, a study on truss member was carried out using the cut-curving process. Before the CFS C-section was curved, the process started by cutting the section in a proper way. A parametric study was conducted to determine the suitability of the cut pattern which recognised as a notch in the section and find out whether or not the notch depth would affect the ultimate load of the CFS C-section column. The study of CFS C-section was separated into two parts; firstly, to investigate the mechanical behaviour of the column in different notch depths and secondly, to investigate the behaviour in different column height with fixed notch depth. The notch width of 3 mm and notch spacing of 100 mm for both parts were fixed. Total specimen for both parts were 15 specimens. The results of the study showed that the reduction of the ultimate load was about 56 – 65% of the variation of notch depth section when compared with the normal section. Therefore, the ultimate load of the section with the notch decreased when the notch depth increased. In addition, the study illustrated that the reduction of the ultimate load was 64 – 82% of the variation of column height between 100 mm to 500 mm. Finally, the average percentage of the column height was 72% which can use in the modification of CFS C-section without notch to CFS C-section with notch calculation.
Susanto, Tantut,Syahrul, Syahrul,Sulistyorini, Lantin,Rondhianto, Rondhianto,Yudisianto, Alfi The Korean Pediatric Society 2017 Clinical and Experimental Pediatrics (CEP) Vol.60 No.10
Purpose: This study aimed to evaluate a pilot project of the Nursing Feeding Center "Posyandu Plus" (NFCPP) through local food-based complementary feeding (LFCF) program designed to improve the nutritional status of children aged 6-36 months at community health centers in Indonesia. Methods: A quasi-experimental design was used to obtain data regarding the nutritional status of 109 children who participated in the project from 6 rural areas. The NFCPP was conducted for 9 weeks, comprising 2 weeks of preintervention, 6 weeks of intervention, and one week of postintervention. The LFCF intervention consisted of 12 sets of recipes to be made by mothers and given to their children 4 times daily over 6 weeks. The weight-for-age z score (WAZ), height-for-age z score (HAZ), weight-for-height z score (WHZ), and body mass index-for-age z score (BAZ) were calculated using World Health Organization Anthro Plus version 1.0.3. Results: LFCF intervention significantly increased WHZ, WAZ, and BAZ scores but decreased HAZ scores (P<0.001). Average scores of WHZ ($0.96{\pm}0.97$) and WAZ ($0.45{\pm}0.72$) increased; BAZ increased ($1.12{\pm}0.93$) after 6 weeks of LFCF. WAZ scores postintervention were 50.5% of normal, and WHZ scores were 77.1% of normal. However, the HAZ score decreased by $0.53{\pm}0.52$, which indicated 57.8% had short stature. Conclusion: The NFCPP program with LFCF intervention can improve the nutritional status of children in rural areas. It should be implemented as a sustained program for better provision of complementary feeding during the period of lactation using local food made available at community health centers.
Andi Masyitha Irwan,Mayumi Kato,Syahrul Syahrul,Yudi Hardianto,Ilham Bakri,Elly Lilianty Sjattar,Miho Shogenji 한국간호과학회 2021 한국간호과학회 학술대회 Vol.2021 No.10
Aims: Stroke incidence is in the second rank of death leading cause and the third of disability reason. Most of post-stroke patients are older people. Initial assessment of the current daily functioning to determine the kinds of rehabilitation needed is essential. However, the objective and actual measurements are limited. We determined daily functioning among post-stroke older people in the community by using sensor monitoring and matching it with the Functional Independence Measure (FIM). Methods: Sixteen home-dwelling post-stroke older people participated in this pilot study. We measured daily functioning by using a PAM AM300 sensor device and FIM. Stroke and fall history, blood pressure, pain, walking speed, grip strength, leg muscle strength, balance, fall risk, fear of falling, self-efficacy, and nutritional intake were also measured. Results: Sensor monitoring showed that most participants" time was spent on activities inside houses, and very little time was spent on doing sports activities. These findings were matched with FIM results where only one-fourth of participants had complete independence in locomotion walking, and half of them had modified independence in locomotion stairs. These two functions are mainly needed to have independent daily functioning. In addition, walking ability, fear of falling, walking speed, and self-efficacy were significantly different with sensor index activity. Conclusion: Sensor monitoring and FIM could be combined to determine daily functioning description and ability to consider the type of rehabilitation needed by post-stroke patients in the community.
Mirmanto,Syahrul,Emmy Dyah Sulistyowati,I Dewa Ketut Okariawan,Rodian 대한기계학회 2017 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.31 No.3
Chilies are an important agricultural product that is becoming a potential product in Indonesia. Chilies need to be dried in order to be durable. A new drying method was investigated in this study using a simple radiator as a heating source of the heating room. The amount of heat that can be transferred depends on the tested parameters. One parameter is the water temperature. Therefore, our aim was to determine the effect of inlet temperature and ventilation on the heat transfer and water content removal. The temperature employed at the entrance of the radiator varied from 60 °C to 80 °C, while the water mass flow rate used was kept at approximately 12 g/s. The initial heating room temperature was around 30 °C. Agricultural products tested were red chilies with a water content of 86 % - 90 %. The results show that variation of water temperature affects the heat transfer rate and the water content removal, while the prevailing ventilation supports the heat transfer rate but decreases the water removal.
Tantut Susanto,Syahrul,Lantin Sulistyorini,Rondhianto,Alfi Yudisianto 대한소아청소년과학회 2017 Clinical and Experimental Pediatrics (CEP) Vol.60 No.10
Purpose: This study aimed to evaluate a pilot project of the Nursing Feeding Center “Posyandu Plus” (NFCPP) through local food-based complementary feeding (LFCF) program designed to improve the nutritional status of children aged 6–36 months at community health centers in Indonesia. Methods: A quasi-experimental design was used to obtain data regarding the nutritional status of 109 children who participated in the project from 6 rural areas. The NFCPP was conducted for 9 weeks, comprising 2 weeks of preintervention, 6 weeks of intervention, and one week of postintervention. The LFCF intervention consisted of 12 sets of recipes to be made by mothers and given to their children 4 times daily over 6 weeks. The weight-for-age z score (WAZ), height-for-age z score (HAZ), weight-for-height z score (WHZ), and body mass index-for-age z score (BAZ) were calculated using World Health Organization Anthro Plus version 1.0.3. Results: LFCF intervention significantly increased WHZ, WAZ, and BAZ scores but decreased HAZ scores (P<0.001). Average scores of WHZ (0.96±0.97) and WAZ (0.45±0.72) increased; BAZ increased (1.12±0.93) after 6 weeks of LFCF. WAZ scores postintervention were 50.5% of normal, and WHZ scores were 77.1% of normal. However, the HAZ score decreased by 0.53±0.52, which indicated 57.8% had short stature. Conclusion: The NFCPP program with LFCF intervention can improve the nutritional status of children in rural areas. It should be implemented as a sustained program for better provision of complementary feeding during the period of lactation using local food made available at community health centers.