Judul: Risk Assessment of Occupational Safety in  Worker Activities at PT Perikanan Indonesia's, Jakarta Cold storage.
Abstrak: Salah satu peraturan yang perlu dimiliki oleh setiap perusahaan dalam mendukung terlaksananya keselamatan kerja adalah standard operational procedure (SOP). Berdasarkan hasil pra-penelitian di cold storage 2000 ton milik Direktorat Jenderal Penguatan Daya Saing yang dikelola PT Perikanan Indonesia tidak memiliki SOP. Cold storage merupakan salah satu area kerja dengan kondisi yang ekstrem. Tidak adanya SOP di cold storage 2000 ton mengakibatkan peluang terjadinya terjadinya kecelakaan dan penyakit akibat kerja semakin besar. Penelitian ini bertujuan untuk mengidentifikasi aktivitas dan menilai sumber potensi bahaya serta menghitung tingkat risiko kecelakaan dan penyakit akibat kerja pada aktivitas pekerja di cold storage 2000 ton. Metode yang digunakan dalam penelitian ini adalah analisis deskriptif untuk menggambarkan kondisi aktivitas di lokasi penelitian dan menggunakan pendekatan formal safety assessment untuk melakukan penilaian sumber potensi bahaya serta penilaian risiko kecelakaan dan penyakit akibat kerja. Hasil penelitian ini berupa informasi mengenai sumber potensi bahaya dan pengelompokkan risiko kecelakaan dan penyakit akibat kerja. Suhu area kerja merupakan salah satu contoh sumber potensi bahaya yang menimbulkan dampak terparah yaitu memicu munculnya kecelakaan dan penyakit akibat kerja. Terdapat 35 aktivitas yang dilakukan oleh pekerja di cold storage, dimana 18 aktivitas dengan kategori risiko sedang, 8 aktivitas kategori tinggi, dan 3 aktivitas kategori sangat tinggi. Informasi tersebut dapat digunakan dalam membantu penyusunan SOP untuk cold storage 2000 ton., One crucial regulation that every company needed to possess to support the implementation of workplace safety was the Standard Operational Procedure (SOP). Based on the pre-research findings at the 2000-ton cold storage owned by the Directorate General of Strengthening the Competitiveness managed by PT Perikanan Indonesia, there had been an absence of SOP. Cold storage represented a workplace area with extreme conditions. The lack of SOP in the 2000-ton cold storage had increased the likelihood of accidents and work-related illnesses. The research aimed to identify activities, assess potential sources of hazards, and calculate the level of risk of accidents and work-related illnesses among workers in the 2000-ton cold storage. The method employed in that research had involved descriptive analysis to depict the activity conditions at the research site and had employed a formal safety assessment approach to evaluate potential sources of hazards and assess the risk of accidents and work-related illnesses. The research findings had provided information about potential sources of hazards and had categorized the risks of accidents and work-related illnesses. The workplace temperature had been identified as one critical source of hazards that could trigger severe accidents and work-related illnesses. There had been 35 activities carried out by workers in the cold storage, where 18 activities had been categorized as having moderate risk, 8 activities as high risk, and 3 activities as very high risk. This information could be utilized to aid in the formulation of SOPs for the 2000-ton cold storage.
Keyword: workplace accidents, work-related illnesses, cold storage, SOP

Judul: Analisis Keselamatan dan Kesehatan Kerja (K3) Pada Industri Pengolahan Teh (Studi Kasus Pada Bagian Produksi PT. Sinar Inesco, Tasikmalaya)
Abstrak: The problems in Occupational Safety and Health frequently still are ignored. This matter is shown with the number of work accident remain high. Based on data recorded in PT. Jamsostek, there were 83,714 work accident cases in Indonesia within year 2007. This number includes 6,506 handicaps, and 1.883 deaths. Agriculture is one of the most hazardous occupations in worldwide. In several countries the fatal accident rate in agriculture is two times higher than the average for all other industries. PT. Sinar Inesco as one of agro industry has quite intense activity involving labors, appliance, method, expense, and the material and also full time daily work. That condition owns the possibility of the happening of risk or hazard even accident in activity execution. This research was aimed to study potential hazard in working environment, to know the risk level in each hazard, and to identify the factors dealing with Occupational Safety and Health. Risk assessment used qualitative analysis which generally known as 2D model, where risk level was calculated from multiplication of Likelihood with Consequence which was reconciled with matrix table of risk analysis 2D model. Risk level showed by the matrix was then used define control techniques in accordance with literature and condition of location. Identification resulted that hazards at production activity of tea processing were classified into 4 units e.g. pre-withering and withering, hulling and fermentation, drying, sorting and packing. Hazards with low risk levels are slumped, incurred by heat from fan, collided by chair monorail, the noise (at pre withering and withering unit), slipped (at hulling and fermentation unit), clamped in drying door (at drying unit), dust breathed by respiration, noise and collided (at sorting and packing unit). Hazard with medium risk level was included scratches (at pre withering and withering unit), fallen down, electricity shocked, noise (at hulling and fermentation unit), hot exposure and slipped (at drying unit), clamped in enchain, eye incurred by dust and electricity shocked (at sorting and packing unit). The last level is high risk. This kind of risk has to be reduced before continuing work. Hazard with high risk level consist of pulled by propeller, and electricity shocked (at pre withering and withering unit), clamped, cut (at hulling and fermentation unit), fallen down, burned, noise (at drying unit) and pulled by propeller (at sorting and packing unit). Observations indicate that the cause of hazard can be grouped into two, that is, unsafe action done by worker and unsafe condition. Unsafe action done because the workers have less knowledge about Occupational Safety and Health. Unsafe condition commonly caused by destroying equipments such as production machines and the working safety equipments Each hazard has different risk levels; therefore, different control techniques are suggested. Control which can be done in general is to frame Standard Operation Procedure (SOP), to use personal protection, display, as well as to repair damaged equipments and machine. Control can be used by all hazards for low, medium and high risk while the extreme risk has to be eliminated.
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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