Judul: Analisis Risiko Kesehatan dan Keselamatan Kerja di Modern Rice Milling Plant (MRMP) Karawang dengan Pendekatan HIRARC
Abstrak: Implementasi Kesehatan dan Keselamatan Kerja (K3) menjadi penting bagi industri untuk melindungi kesehatan dan keselamatan pekerja, meningkatkan produktivitas, serta mencegah biaya terkait kecelakaan kerja. Penelitian ini bertujuan mengidentifikasi, menganalisis, dan menyusun tindakan pengendalian risiko di MRMP Karawang dengan menggunakan pendekatan Hazard Identification, Risk Assessment, and Risk Control (HIRARC). Potensi bahaya yang telah diidentifikasi berjumlah 26 yang dikelompokkan dalam jenis potensi bahaya mekanik, fisika, kimia, biologi, dan ergonomi. Risiko yang telah teridentifikasi sejumlah 30 yang kemudian dinilai dengan metode semi-kuantitatif berdasarkan pedoman AS/NZS 4360:2004. Tingkat risiko paling prioritas untuk ditindaklanjuti adalah kategori High Risk yaitu kebakaran yang disebabkan korsleting listrik ataupun bara abu burner dan terjatuh dari ketinggian silo. Pengendalian risiko yang digunakan paling banyak mengenai pengendalian administratif, yaitu terkait penerapan prosedur kerja yang aman dan sehat di setiap area kerja, serta penggunaan Alat Pelindung Diri (APD) yang sesuai., The implementation of Occupational Health and Safety (OHS) is crucial for industries to protect the health and safety of workers, enhance productivity, and prevent costs associated with workplace accidents. This study aims to identify, analyze, and develop risk control measures at MRMP Karawang using the Hazard Identification, Risk Assessment, and Risk Control (HIRARC) approach. A total of 26 potential hazards were identified, categorized into mechanical, physical, chemical, biological, and ergonomic hazards. A total of 30 identified risks were assessed using a semi-quantitative method based on the AS/NZS 4360:2004 guidelines. The highest priority risks for mitigation were classified as High Risk, which included fire caused by electrical short circuits or Burner ash embers, and falls from the height of the silo. The predominant risk control measures were administrative controls, particularly the implementation of safe and healthy work procedures in every work area, and the use of appropriate Personal Protective Equipment (PPE).
Keyword: Occupational Health and Safety, HIRARC, AS/NZS 4360:2004, Risk Control

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: Penentuan Nilai Eigen dan Vektor Eigen dari Matriks Tridiagonal 2-Toeplitz dengan Pendekatan Polinomial Chebyshev
Abstrak: The eigenvalues and eigenvectors of a matrix can be determined by finding its characteristic polynomials. The characteristic polynomials of a tridiagonal 2-Toeplitz matrix is shown to be closely connected to polynomials which satisfy the Chebyshev recurrence relationship. If the order of the matrix is odd, then the eigenvalues are found explicitly in terms of the Chebyshev zeros and the eigenvectors are found in terms of the polynomials satisfying the recurrence relationship. For even ordered matrices, the situation is more complicated. The problem in these cases is that although the Chebyshev recurrence formula is still applied, its initial values are not generating Chebyshev polynomials
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