Analisa Identifikasi Bahaya Menggunakan Metode JSA dan HIRADC pada Pekerjaan Pembersihan Tangki (Studi Kasus : PT. Sagara Mutiara Teknik )

Work accidents are one of the problems that are often encountered in the world of the construction industry. The main cause of work accidents is unsafe action. This happens because there is a lack of awareness about the magnitude of the risks that must be borne by all elements of the company. One of the high-risk jobs carried out by PT. Sagara Mutiara Teknik is tank cleaning work. In the hazard identification stage, tank cleaning work is carried out using the JSA method. Furthermore, risk assessment and control recommendations are carried out using the HIRADC method. There are several types of potential hazards found in tank cleaning work, namely falling from a height, sharp materials, slipping, dust exposure, falling materials, chemical exposure. Recommendations for improvement are made after knowing the potential hazards and implemented in the occupational safety and health management system to reduce the risk of work accidents that occur in tank cleaning work.

Media Pembelajaran Surat Kabar dalam Meningkatkan Motivasi, Aktivitas terhadap Prestasi Belajar Ekonomi

This research aims to determine the utilization of instructional media newspapers effect in increasing motivation and activities on learning achievement economics. The method is ex post facto. Hypothesis was analized using path analysis.The results showed that there was a significant effect of: (1) utilization instructional media newspapers on motivation; (2) utilization instructional media newspapers on activity; (3) motivation on learning achievement; (4) activities on learning achievement; (5) utilization instructional media newspapers on learning achievement; (6) utilization instructional media newspapers and motivation on learning achievement; (7) utilization instructional media newspapers and activities on learning achievement.Penelitian ini bertujuan untuk mengetahui apakah ada pengaruh pemanfaatan media pembelajaran surat kabar dalam meningkatkan motivasi dan aktivitas belajar terhadap prestasi belajar. Metode yang digunakan adalah ex post facto. Pengujian hipotesis menggunakan analisis jalur. Hasil penelitian menunjukkan bahwa ada pengaruh yang signifikan: (1) pemanfaatan media pembelajaran surat kabar terhadap motivasi; (2) pemanfaatan media pembelajaran surat kabar terhadap aktivitas; (3) motivasi terhadap prestasi belajar Ekonomi; (4) aktivitas terhadap prestasi belajar Ekonomi; (5) pemanfaatan media pembelajaran surat kabar terhadap prestasi belajar Ekonomi; (6) pemanfaatan media pembelajaran surat kabar dan motivasi terhadap prestasi belajar; (7) pemanfaatan media pembelajaran surat kabar dan aktivitas terhadap prestasi belaja

The Effect of Heating on Physicochemical Characteristics of Rice Brand Oil

Rice bran oil has a potential in lowering blood cholesterol. The oil content extracted from rice bran isa influenced by several factors such as raw material and processing method. This research was conducted to study the effect of heating on the physicochemical characteristics of rice bran oil. The study was carried out at the Food Technology and Nutrition Laboratory and Biotechnological Science Laboratory of the Inter University Center, Bogor Agricultural University, from February to MAy 1997. Bran used was from IR64 rice variety obtained from a local milling rice in Tambak Dahan, Binong-Subang, West Java. Rice bran was subjected to different period of heating (0, 15 and 30 minutes) at 121oC by using an autoclave, then the oil was extraxted by using hexane solvent followed by standard processing at room temperature (28-30oC) and 40oC for two hours. The parameters observed were oil content and its quality such as saponification, iodine, acid, peroxide, tiobarbituric acid, and triglyceric acid values as well as oil color. The results showed that oil extracted from rice bran was high, ranging from 9.65 to 11.02%. Heating (sterilizing) of the rice bran for 15 and 30 minutes at 120oC proir to extraction increased the oil content. The Quality of rice bran oil extracted met the standard of AOAC

MEDIA PEMBELAJARAN SURAT KABAR DALAM MENINGKATKAN MOTIVASI, AKTIVITAS TERHADAP PRESTASI BELAJAR EKONOMI

This research aims to determine the utilization of instructional media newspapers effect in increasing motivation and activities on learning achievement economics. The method is ex post facto. Hypothesis was analized using path analysis.The results showed that there was a significant effect of: (1) utilization instructional media newspapers on motivation; (2) utilization instructional media newspapers on activity; (3) motivation on learning achievement; (4) activities on learning achievement; (5) utilization instructional media newspapers on learning achievement; (6) utilization instructional media newspapers and motivation on learning achievement; (7) utilization instructional media newspapers and activities on learning achievement.Penelitian ini bertujuan untuk mengetahui apakah ada pengaruh pemanfaatan media pembelajaran surat kabar dalam meningkatkan motivasi dan aktivitas belajar terhadap prestasi belajar. Metode yang digunakan adalah ex post facto. Pengujian hipotesis menggunakan analisis jalur. Hasil penelitian menunjukkan bahwa ada pengaruh yang signifikan: (1) pemanfaatan media pembelajaran surat kabar terhadap motivasi; (2) pemanfaatan media pembelajaran surat kabar terhadap aktivitas; (3) motivasi terhadap prestasi belajar Ekonomi; (4) aktivitas terhadap prestasi belajar Ekonomi; (5) pemanfaatan media pembelajaran surat kabar terhadap prestasi belajar Ekonomi; (6) pemanfaatan media pembelajaran surat kabar dan motivasi terhadap prestasi belajar; (7) pemanfaatan media pembelajaran surat kabar dan aktivitas terhadap prestasi belajarKata kunci: aktivitas, media pembelajaran, motivasi, prestasi belaja

Macrophages fine-tune pupil shape during development

Tissue macrophages, which are ubiquitously present innate immune cells, play versatile roles in development and organogenesis. During development, macrophages prune transient or unnecessary synapses in neuronal development, and prune blood vessels in vascular development, facilitating appropriate tissue remodeling. In the present study, we identified that macrophages contributed to the development of pupillary morphology. Csf1op/op mutant mice, in which ocular macrophages are nearly absent, exhibited abnormal pupillary edges, with abnormal protrusions of excess iris tissue into the pupillary space. Macrophages located near the pupillary edge engulfed pigmented debris, which likely consisted of unnecessary iris protrusions that emerge during smoothening of the pupillary edge. Indeed, pupillary edge macrophages phenotypically possessed some features of M2 macrophages, consistent with robust tissue engulfment and remodeling activities. Interestingly, protruding irises in Csf1op/op mice were only detected in gaps between regressing blood vessels. Taken together, our findings uncovered a new role for ocular macrophages, demonstrating that this cell population is important for iris pruning during development

Ion structure factors and electron transport in dense Coulomb plasmas

The dynamical structure factor of a Coulomb crystal of ions is calculated at arbitrary temperature below the melting point taking into account multi-phonon processes in the harmonic approximation. In a strongly coupled Coulomb ion liquid, the static structure factor is split into two parts, a Bragg-diffraction-like one, describing incipient long-range order structures, and an inelastic part corresponding to thermal ion density fluctuations. It is assumed that the diffractionlike scattering does not lead to the electron relaxation in the liquid phase. This assumption, together with the inclusion of multi-phonon processes in the crystalline phase, eliminates large discontinuities of the transport coefficients (jumps of the thermal and electric conductivities, as well as shear viscosity, reported previously) at a melting point.Comment: 4 pages, 2 figures, REVTeX using epsf.sty. Phys. Rev. Lett., in pres