Judul: Analisis Kebisingan dan Dampak Lingkungan pada Proses Penggilingan Padi (Studi Kasus Penggilingan Padi Saluyu Situ Gede, Bogor Barat)
Abstrak: Rice mill process is one of the factors to increase the rice quality. Indonesia is one of the big rice producers in the world, it couldn't be imagined the noise if every single village has the rice mill enterprise. The purpose of this research is to analyse level and noise dissemination pattern in the rice mill, analyze maximum duration in the room based on noise threshold based on labor standard, analyze and measure noise in the surrounding of the rice mill area, as well as control the noise and analyze employee hearing deterioration. Data is collected by doing direct measurement in the field and interview towards 2 respondents. The result obtained is the highest noise in the place that is often passed by rice mill employee in the area near the diesel machine sized 105 dB, in the husker operation area sized 90 dB and in the polisher operation area sized 92 dB. Maximum time limit of being near to the diesel machine is safe and continued based on DEPNAKER RI standard with a noise level of 105 dB is 30 minutes, in husker operation area with a noise level of 90 dB is 4 hours and in polisher operation area with a noise level of 92 dB is 3 hours. Noise measurement result in a resident's house terrace is 65 dB and the noise level in PAUD class room is 58 dB. Technical design for the noise control by using barrier as a sound-damper building is designed for the resident's house and PAUD because the noise passes standard level of the allowed noise. For barrier design that has been made 180 cm high, noise reduction has estimated for 22%. Audiometric test result for 2 employees that work on rice mill is, for the respondent 1 with 45 years old has right ear got a medium deaf and the left ear got serious deaf and respondent 2 with 38 years old has both ears got minor deaf.
Keyword: audiometrict test, environmental noise, room noise, ricemill

Judul: Mempelajari Tingkat Kebisingan Dari Rice Mill Tipe Lintasan Tunggal Yang Memakai Berbagai Macam Bahan dan Bentuk Sekat
Abstrak: Menurut pernyataan Menteri Muda Urusan pangan pada awal Februari 1980, untuk tahun 1980 Indonesia membutuhkan beras sebanyak 18,54 juta ton yang sebagian besar (16,32 juta ton) diproduksi didalam negeri. Untuk mengubah padi menjadi beras diperlukan proses penggilingan yang biasanya dilakukan dengan menggunakan alat giling (Rice Mill) yang digerakkan oleh motor penggerak. Pada proses pemberasan diperlukan operator, dan mereka bekerja dilingkungan bising yang terutama ditimbulkan oleh gesekan pada alat giling dan motor penggerak. Kebisingan merupakan gangguan yang biasa terjadi pada industri yang menurut sifatnya sendiri tidak membahayakan jiwa manusia, sehingga sampai tahun 1960 an tidak satupun negara bagian Amerika Serikat membayar ganti rugi untuk cedera/cacat sebagai akibat terkena-kebisingan (Peterson 1977). Kehilangan pendengaran akibat suara bising dapat dicegah dengan mengetahui lamanya terkena-kebisingan yang diizinkan untuk level suara tertentu. Berdasarkan OSHA kenya- manan seseorang bekerja selama 8 jam per hari dapat dicapai dengan tingkat kebisingan dibawah 90 dB. Penggurangan ter- kena-kebisingan dapat dilakukan dengan memberikan peredam suara antara telinga dengan sumber suara. Tujuan umum dari penelitian ini adalah mempelajari tingkat kebisingan yang terjadi pada proses pemberasan dengan menggunakan Rice Mill tipe lintasan tunggal. Secara terperinci, tujuan penelitian ini adalah 1) mempelajari perubahan tingkat kebisingan yang diakibatkan oleh penggunaan beberapa cara isolasi suara yang dapat dilakukan pada proses pemberasan, dan 2) menganalisa biaya tambahan yang diperlukan untuk menaikkan jam kerja yang diizinkan. ...
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Judul: Pelabelan Super Vertex Magic
Abstrak: Super vertex magic labeling is labeling on graph with is a set of edges mapped into and is a set of vertices mapped into . It has a vertex magic labeling in which and represents the size and order of the graph respectively. This manuscript proves that paths, cyclics, and disjoint union of cyclics have a super vertex magic labeling. There are four theorems to be discussed. The first theorem proves that path is super vertex magic if and only if is odd and . The second theorem proves that cyclic is super vertex magic if and only if is odd. The third theorem proves that bijection function from an edge set onto of graph can be extended to a super vertex magic labeling if and only if the set amount of edge label that incidents with a vertex in the graph, consists of sequential integers as many as vertices in the graph. The fourth theorem proves that disjoint union of the cyclics consists of cyclics with each cyclic has vertices is super vertex magic if and only if and are odd.
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