Judul: Analyzing of acceleration and direction of mechanical vibration to physiological, motoric and psychological of human
Abstrak: Machinery has helped human work but also generate mechanical vibration. Mechanical vibration has disturbed human performance. This research analyzed effect of mechanical vibration to human in laboratory. Simulator was designed based on mechanical concept. It vibrates at frequency below 50 Hz and acceleration between 1 m/sc2 and 10 m/sc2, like vibration in sugar cane factory. Objective of this paper is analyzing effect of mechanical vibration to exhausted, energy, response time, and human discomfort at some levels of vibration accelerations. Simulator has produced vibration in six levels of acceleration. Fourteen subjects participated in this simulation. Human exhausted was measured by flicker test, working energy based on human heart rate, discomfort based on respondent questioner, and response time based on response time simulation. On this research, WBV didn’t have significant effect on human exhausted. Curve of working energy and response time have the similar shapes, increased as polynomial pattern as increased of acceleration simulation. Longer stimulus time and higher working energy happened at acceleration 1.5 m/sc2 – 4.5 m/sc2. Graph of discomfort had power curve shape, because discomfort was subjective judgment which involved human sensor. Effect of vibration on horizontal direction is higher from vertical direction on working energy, response time, and discomfort of human.
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Judul: The Effect of Vibration and Noise of Mujitech Tools on the Health of Pine Tapping Workers
Abstrak: Getaran dan kebisingan merupakan faktor fisik yang memengaruhi kesehatan manusia. Tujuan penelitian ini menganalisis pengaruh getaran dan kebisingan alat mujitech terhadap risiko gangguan kesehatan dengan tiga parameter yaitu kemampuan motorik, daya konsentrasi, dan detak jantung. Pengukuran getaran dilakukan pada bahu, tangan saat tidak memegang handle, tangan saat memegang handle menggunakan alat pelinding diri (APD) berupa sarung tangan, dan tanpa APD. Pengukuran kebisingan saat terpapar menggunakan APD berupa earmuff dan tanpa APD. Uji Wilcoxon digunakan untuk menganalisis pengaruh getaran dan kebisingan terhadap risiko gangguan kesehatan berdasarkan hasil pretest dan posttest. Getaran berpengaruh terhadap kemampuan motorik. Terpapar kebisingan menggunakan APD tidak berpengaruh terhadap daya konsentrasi, sedangkan kebisingan tanpa APD berpengaruh terhadap daya konsentrasi. Getaran dan kebisingan berpengaruh terhadap detak jantung dan dapat meningkatkan detak jantung., Vibration and noise are physical factors that affect human health. The purpose of this study is to analyze the effect of vibration and noise of mujitech tools on the risk of health problems with three parameters, namely motor ability, concentration power, and heart rate. Vibration measurements were taken on the shoulders, hands when not holding the handle, hands when holding the handle using personal protective equipment (PPE) in the form of gloves, and without PPE. Noise measurements when exposed using PPE in the form of earmuffs and without PPE. Wilcoxon test was used to analyze the effect of vibration and noise on the risk of health problems based on pretest and posttest results. Vibration affects motor skills. Exposure to noise using PPE has no effect on concentration power, while noise without PPE has an effect on concentration power. Vibration and noise affect heart rate and can increase heart rate.
Keyword: Mujitech, noise, vibration

Judul: Posisi Filogenetik Kura-Kura Carettochelys Insculpta  (Reptillia: Testudinata)
Abstrak: Carettochelys insculpta is an endemic freshwater turtle of southern Papua and northern Australia. Phylogenetic position of this turtle is remain unresolved until now. Most of the research conducted show close relationships of C. insculpta and members of Trionychidae family. However, some of the research show distance between C. insculpta and members of Trionychidae family. This research is conducted to analyze phylogenetic relationship between C. insculpta and other members of Testudinata using 12S rRNA, 16S rRNA, and both gene as markers. DNA samples were obtained from three different organisms of C. insculpta. Two species used as outgroups were Alligator mississippiensis and Iguana iguana. Phylogenetic analysis was carried out using Neighbor-Joining method with Felsenstein 1981 (F81) modeltest. A polytomy tree of Testudinata was produced by using 12S rRNA gene. However, analysis using 16S rRNA and both genes as markers confirmed that C. insculpta was located between the Chelonidae and the Trionychidae family.
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