Judul: Uji Performansi Getaran Mekanis dan Kebisingan Mist Blower Yanmar MK 150-B
Abstrak: Mist blower is one of the mechanization tool of agriculture considered as a tool that can assist humans in fertilizer and pesticides spreading activities. Levels of motor speed in the used mist blower were 1915, 4009, and 7227 rpm. Vibration measurements were conducted on the engine and handlebar control mist blower with the three-dimensional axes namely X, Y, and Z. Mist blower noise measurements were performed on the engine, operator's right ear and left ear. Based on the analysis of vibration and noise from the mist blower of type MK 150-B was obtained the safe limit values from the use of these tools. The safe limit of the use of mist blower in motor rotation speed of 1915, 4009, and 7227 rpm after being compared with the vibration and noise were 1 hour, 1 hour and 24 minutes respectively. The farther the distance from noise source, the lower the noise level too. Moreover objectivity study of operator was conducted. The first farmer was tired faster than the second farmer. In terms of age of farmer, the second farmer (60 years) older than the first farmers (40 years), but this should not affect significantly. Activity on the previous day greatly affects the level of fatigue when operating the mist blower. This was because the first farmers did more activities and had rest periods that less than second farmer.
Keyword: 

Judul: Uji Getaran Mekanis dan Kebisingan terhadap Operator Traktor Dua Roda Yanmar YST-DX dan Perkasa 850-DI pada Pengoperasian di Laban Sawah dan Lahan Kering
Abstrak: Penggunaan alat-alat mekanisasi pertanian dalam setiap kegiatan pertanian semakin meningkat. Pemakaian alat dan mesin pertanian dapat meningkatkan produktivitas hasil pertanian dan memudahkan pekerjaan petani yang membutuhkan tenaga besar. Tetapi penggunaan alat dan mesin pertanian dirasa masih menimbulkan masalah sehingga terdapatnya kecelakaan kerja dan gangguan kesehatan. Oleh karena itu perJu dilakukan uji ergonomikanya. Salah satu contoh alat mekanisasi pertanian yang umum digunakan adalah traktor dua roda. Traktor dua roda digunakan sebagai alat pengolah tanah yang lebih efektif dibandingkan dengan menggunakan tenaga hewan dan tenaga manusia sendiri dengan menggunakan peralatan tradisional.
Keyword: 

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.
Keyword: