Judul: Mempelajari tingkat dan pengendalian kandungan debu pada proses penggilingan padi di KUD Sumber Alam Ciherang, Bogor
Abstrak: Pabrik penggilingan padi adalah pabrik pengolahan gabah menjadi beras. Dalam proses penggilingan padi yang dilakukan, banyak dihasilkan debu yang dapat mengganggu kenyamanan maupun kesehatan operator atau pekerjanya. Dampak-dampak yang terjadi semakin banyak dan kompleks, baik dampak yang terjadi pada operator atau pekerjanya maupun dampak yang terjadi pada lingkungan sekitarnya. Dalam pengkajian masalah khusus ini, dipelajari tingkat kandungan debu yang terjadi pada proses penggilingan padi dan menentukan cara yang dapat mengurangi pengaruh kadar debu tersebut dalam lingkungan pabrik. Penelitian ini dilakukan dengan mengambil studi kasus di Pabrik Penggilingan Padi KUD Sumber Alam Ciherang, Bogor. Pengukuran kadar debu dilakukan dengan menggunakan Digital Dust Indicator Model PCD-1, yaitu alat pengukur kadar debu dengan melewatkan debu melalui tabung yang sensitif terhadap debu. Sinar lampu dalam alat ini kemudian akan dapat mendeteksi kandungan debu dari udara yang terhisap. Pengukuran kadar debu ini dilakukan pada ketinggian 145 dan 155 cm dari permukaan tanah, jarak 50 cm, 100 cm dan 200 cm dari lokasi operator bekerja serta kelembaban udara yang berbeda yaitu pada pagi dan siang hari…dst
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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: Penggunaan Teorema Homeomorphy 2-Manifold dan Teorema Euler Poincare pada Torus 𝑇�� dan Simplicial Complex 𝐾��
Abstrak: Two dimensional topological spaces are said to be homeomorphic if they have the same topological invariant, where one of topological invariant used is an Euler characteristic. Homeomorphy 2-Manifold’s Theorem and Euler Poincare’s Theorem are used to distinguish two topological spaces. Homeomorphy 2-Manifold’s Theorem uses Euler characteristic to identify two dimensional topological spaces. Euler Poincare’s Theorem is an alternative way to find Euler characteristic with Betti number, which is topological invariant as well. The objective of this paper is to investigate the homeomorphism of torus 𝑇����� and simplicial complex 𝐾�����. Topological space torus and simplicial complex 𝐾����� have the same Euler characteristic, which is two. Based on Homeomorphy 2-Manifold’s Theorem topological space torus 𝑇����� and simplicial complex 𝐾����� is homeomorphic.
Keyword: simplicial, torus, Euler, homeomorphism, topology