Satellite actuator balancing based on the disturbance measurement table data

Author(s):  
Dong-Ik Cheon ◽  
Eun-Jeong Jang ◽  
Hwa-Suk Oh
Keyword(s):  
2008 ◽  
Vol 238 (1) ◽  
pp. 170-177 ◽  
Author(s):  
D.K. Chandraker ◽  
P.K. Vijayan ◽  
D. Saha ◽  
R.K. Sinha

2020 ◽  
pp. 1-11
Author(s):  
Xiaoying Xu ◽  
Zhijian Zeng

The regional economic evaluation and analysis has guiding significance for the subsequent economic strategy formulation. Due to the influence of various factors, the volatility of some current economic evaluation models is relatively large. According to the needs of regional economic evaluation, this study uses computer technology combined with regional economic development to build an economic development evaluation model to evaluate and analyze the regional economy. Through comparative analysis, this study selects the entropy weight-TOPSIS model as the comprehensive evaluation model of regional economy, uses the entropy weight method to determine the weight of each index, and then uses the TOPSIS method to conduct comprehensive evaluation. In addition, this study designs a control experiment to analyze the performance of this study model. Moreover, this study uses the model proposed in this study to conduct regional economic evaluation in recent years, and compares it with real data, and observes the test results with statistical charts and table data. The research results show that this research model has a certain effect, which can provide analytical tools for the follow-up economic strategy research and analysis.


BMJ Open ◽  
2011 ◽  
Vol 1 (1) ◽  
pp. e000128-e000128 ◽  
Author(s):  
J. W. Vaupel ◽  
Z. Zhang ◽  
A. A. van Raalte

2021 ◽  
Vol 10 (1) ◽  
pp. 65-71
Author(s):  
Dwi Putri Sulistiya Ningsih ◽  
Ida Rahmawati

Background: Fishermen are a high risk group for developing pterygium. The high frequency of exposure to UV, wind, dust and sand when working makes the prevalence of pterygium among fishermen quite high. The city of Bengkulu, which is geographically located on the west coast of Sumatra Island which is directly facing the Indonesian Ocean, makes the majority of its population work as fishermen. Objectives: This study aims to determine the relationship between duration of being a fisherman, distance to health facilities and smoking with pterygium disease in a group of fishermen in, Bengkulu. Methods: Analytical observational research with case control design. The sample of 120 fishermen consisted of 40 cases and 80 controls, because researchers used a case-control ratio of 1:2. Sampling using purposive sampling method. The dependent variable was pterygium disease. Independent variables of duration as a fisherman, distance of health facilities and smoking. The research instrument uses a structured questionnaire that has been tested for validity and reliability with Alpha Cronbach value (0.996) > r table. Data were analyzed by Chi Square. Results: Based on the research results, it was found that there was a significant relationship with duration as a fisherman (≥ 21 years) (OR = 3.980; 95%CI = 1.404-11.284; p = 0.006) with pterygium disease. There is no relationship between smoking (OR = 1.246; 95%CI = 0.559-2.778; p = 0.590) with pterygium disease. There is a significant relationship between the distance of health facilities (OR = 5.133; 95%CI = 2.249-11.715; p = 0.000) with pterygium disease. Conclusion: The length of time working as a fisherman increases the risk of developing pterygium disease as the frequency of exposure to UV, dust, wind and sand increases. It is necessary to use personal protective equipment to reduce the risk of exposure and education from health workers so that the public can take good preventive measures.   Keywords: Duration as a fisherman, distance health facilities, smoking, pterygium.


2015 ◽  
Vol 17 (3) ◽  
pp. 135
Author(s):  
Sudibyo Sudibyo

Abstract This study aims to predict the shooting range based on damage the type of lead a projectile without jacket caliber.38 special fired from handguns kinds brand Revolver S & W caliber .38 specials. Based on the phenomenon of criminal cases of abuse handguns types Revolver and the fact that real data it was found that 8% of the amount of lead projectiles without jacket as forensic evidence, the condition has broken the deformed moderate to severe.         The study was conducted at the Police Forensic Laboratory experimental method test-fired in the shooting box at short throw distance range of 0.5 to 6 meters , where the bone is positioned at the target position changes location every 0.5 meters, so the total number of shots is 12 times shot on 12 position target location, and finally obtained 12 variations of deformation projectile shot results.        Stages test firing conducted through three stages as follows: 1). Phase sample preparation equipment and materials firearms, bullets and target bone. 2). Phase shooting target accurately. 3). Stages of deformation measurements and weighing projectile, arranged in the form of table data.        Material samples of bullet used was the type of lead bullets without jacket caliber .38 special with technical specifications diameter of projectile 9.09 mm (real 9.05 mm), length of projectile 17.90 mm (real 18.61 mm), projectile material lead antimony, projectile weight of 10.25 grams, muzzle velocity (initial) 265 m / sec, rounded nose shape, coefficient of form C = 2, the ballistic coefficient i = 0,9 effective range or the distance accurately of 25 meters.        Material samples of bone were used as target is 1694 SR veal ribs with bone hardness values (87 ± 1.5) shore, is used for the calibration test firing, a human skull age adults (≥ 35 years) with a value of hardness (78 ± 6 ) shore, is used as the target subjects of research, human ribs (costal C-3 / C-6) adult (≥ 35 years) with a value of hardness (69 ± 19.5) shore, is used as the target subjects of research. Keywords : deformation; projectiles; bones


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