Judul: Keselamatan Kerja pada Pembuatan Kapal Model Berbahan Fiberglass
Abstrak: Keselamatan kerja adalah sarana untuk pencegahan kecelakaan, cacat dan kematian sebagai akibat kecelakaan kerja. Penelitian ini bertujuan untuk mengidentifikasi prosedur kerja pembuatan kapal model berbahan fiberglass dan mengidentifikasi secara jelas jenis bahaya pada aktivitas pembuatan kapal model berbahan fiberglass. Penelitian ini dilakukan dengan menggunakan metode studi kasus. Identifikasi keselamatan kerja didapatkan melalui metode hierarchical task analysis. Pengelompokkan potensi bahaya berdasarkan peluang konsekuensi kegagalan yang teridentifikasi berupa tidak berbahaya (pekerjaan tertunda), ringan (tergores dan gatal), menengah (tertusuk dan iritasi kulit), berat (terpotong dan tertimpa kapal) dan fatal (tersengat listrik). Upaya pengendalian yang dilakukan adalah pengadaan alat pelindung diri yang cukup lengkap dan kondisi masih baik, namun masih belum ada kesadaran dari pekerja untuk menggunakan APD (Alat Pelindung Diri) sesuai pekerjaannya. Identifikasi terhadap proses pembuatan kapal model berbahan fiberglass menunjukkan bahwa proses produksi pembuatan badan kapal merupakan proses produksi yang paling berisiko.
Keyword: fiberglass, fiberglass ship, work safety

Judul: Identifikasi Keselamatan Kerja pada Proses Pembuatan Perahu Fiberglass
Abstrak: Safety works in any workplace including in the workshop should be noted to reduce the risk of accidents as low as possible. The purpose of this research to clearly identify the types of hazards in fiberglass boat building activities, and make an analysis of the potential safety hazards in fiberglass boat manufacturing activity. Identification of safety was obtained through job safety analysis method. Grouping based on the level of potential hazards consequences were harmless (work pending), mild (scratched, itching), medium (punctured, skin irritation), severe (cut, hit by boat), and fatal (electric shock). Control efforts was undertaken procurement the personal protective equipment which fairly complete and in a good condition, but there is still no awareness of workers to use appropriate PPE work. Identification of the process of making fiberglass boat showed that construction of the framework was the most risky phase. Risk levels vary from mild to fatal that might eliminate a person's life. Safety analysis showed that the process of making fiberglass boat has a high level of risk in terms of safety.
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Judul: Biological Characteristics of Jatropha curcas Trimonoecious
Abstrak: Physic nut (Jatropha curcas L.) is an original plant from tropical America belonging to the family of Euphorbiaceae and an annual plant of monoecious. Commonly J.curcas have male and female flowers on the same plant. There are currently some J. curcas which have hermaphrodite flowers from monoecious plants, but very rarely. J. curcas with hermaphrodite flowers are classified as andromonoecious type (having hermaphrodite and male in the same plant) and trimonoecious type (having male, female, and hermaphrodite flowers in the plant). Trimonoecious plants with hermaphrodite flowers were tend to perform self-pollination (geitonogamy) and produce a homogenous and high-productivity in next generation. J. curcas plants is difficult in differentiating between monoecious and trimonoecious plants when it seedling, and this is a limiting factor to know development of trimonoecious J. curcas. Trimonoecious J.curcas can be identified after six months of planting, and when it have started flowering. Therefore, the trimonoecious J. curcas biological characteristics needs to be an observation. The trimonoecious trait in J. curcas plants can be identified through several analyses, i.e. the analysis of agronomical characteristics, the chromosomes analysis, the isozyme analysis, and the analysis of pollen viability. The study was conducted in December 2011 - February 2013. The experiments were conducted using the Randomized Complete Block Design for one factor, the J. curcas genotype with 5 replicates. Each unit of the experiment consisted of 5 plants. Aagronomics characteristic analyses were conducted using analysis of variance (ANOVA) followed by the Duncan Multiple Range Test (DMRT) at 5% level. The classification of heritability and Genetic Variation Coefficient (GVC) criteria and relative Phenotypic Variation Coefficient (PVC). The analysis of genetic distance clustering was done using the Minitab 1.5 program clustering method. J. curcas stem trimonoecious characters is the primary branches angle, stem diameter, number of primary and secondary branches have a higher size than monoecious plants. Diameter and thickness fruit flesh origins from monoecious plants larger than fruit from plants trimonoecious. Characteristics of the trimonoecious plants in this study were almost the same with their mother plant. Number chromosomes number of J. curcas plant genotypes have 2n = 22 chromosomes The average length of the trimonoecious plant’s chromosome was longer than the average for monoecious plants. The length of chromosomes can differ among one family, even though the numbers of the chromosomes are similar. Isozymes peroxidase (Rf 0.83) and esterase (Rf 0.20) could be used as markers to differentiate between trimonoecious and monoecious plants. Male flower pollen viability of plant origin trimonoecious have a slower rate of decrease than male flowers monoecious plants. The dendrogram from the cluster analysis results could differentiate between trimonoecious and monoecious plants with a variation coefficient of 27.25.
Keyword: Esterase, peroxidase, pollen viability, trimonoecious