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JURNAL SAINS DAN TEKNOLOGI INDONESIA

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Articles 236 Documents

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PENGARUH PUPUK AKAR (NPK) DENGAN PUPUK DAUN (MULTIMIKRO) DAN ZAT PENGATUR TUMBUH (ETHREL) TERHADAP PERTUMBUHAN VEGETATIF TANAMAN LADA Mulyono, Daru
Jurnal Sains dan Teknologi Indonesia Vol. 11 No. 3 (2009)
Publisher : Badan Pengkajian dan Penerapan Teknologi

The objective of the research was to investigate the effect of root fertilizers NPK (Nitrogen, Phospor, and Potassium) combined with leaf fertilizer (Multimikro) and Growth Regulating Substance (Ethrel) to the vegetative growth of pepper plants. Theresults of the research showed that the use of root fertilizers NPK (dosage: 2.5; 5.0; and 10.0 g/plant) increased the plants height of 12,0 cm, 19,8 cm, and 23,1 cm respectively. The use of root fertilizers NPK (dosage: 2.5; 5.0; and 10.0 g/plant) combined with leaf fertilizer Multimikro (dosage 1.5 ml/l) increased plant height significantly 15.4 cm, 23.3 cm, and 26.9 cm respectively. Moreover, the use of root fertilizer NPK (dosage: 2.5; 5.0; and 10.0 g/plant) combined with Growth Regulating Substance Ethrel (dosage 1.5 ml/l) increased the vegetative growth of pepper plants significantly to a high of 18.4 cm, 28.4 cm, and 32.5 cm respectively. Conclution of the research indicated that the combination between NPK fertilizer and Ethrel was better than the combination between NPK fertilizer and Multimikro to the vegetative growth of pepper plants.

Kajian Kerentanan Gempabumi Gedung Bertingkat Dengan Bentuk Beaturan Dan Tidak Beraturan Pradono, Mulyo Harris
Jurnal Sains dan Teknologi Indonesia Vol. 16 No. 3 (2014)
Publisher : Badan Pengkajian dan Penerapan Teknologi

Jakarta as the capital of the country has a lot of buildings. The number of multi-story buildings with a height of more than nine floors reaching more than 700 buildings. Meanwhile, Jakarta is also not free from the threat of earthquakes. According to the Ministry of Public Works, Jakarta was in zoning with moderate seismicity level. However, it does not avoid the possibility of the occurrence of large earthquakes, i.e. to the level of 2500 year earthquake. A seismic level of 500 years of occurrence probability would produce an earthquake tremor in Jakarta as large as that felt in Padang in September 2009, which is around MMI VII to VIII. Therefore, it is necessary to study the vulnerability of high-rise buildings in Jakarta in the face of the threat of earthquakes, so as to assess the level of the risk.Jakarta sebagai ibukota negara memiliki banyak sekali gedung bertingkat. Jumlah gedung bertingkat dengan ketinggian lebih dari sembilan lantai mencapai lebih dari 700 gedung. Sementara itu, Jakarta juga tidak lepas dari ancaman gempabumi. Menurut Kementerian Pekerjaan Umum, Jakarta berada pada zonasi dengan tingkat kegempaan sedang. Namun tidak terhindar dari kemungkinan terjadinya gempabumi besar, yaitu untuk level gempa 2500 tahun. Sedangkan gempa dengan probabilitas kejadian 500 tahun akan menghasilkan gempa tremor di Jakarta sebesar seperti yang dirasakan di Padang pada bulan September 2009, yaitu sekitar MMI VII sampai VIII. Oleh sebab itu, diperlukan kajian kerentanan gedung-gedung bertingkat di DKI Jakarta dalam menghadapi ancaman gempabumi, sehingga dapat diketahui tingkat risikonya.Keywords: multistory building, shape, vulnerability, risk, earthquake

PENILAIAN PRIORITAS PENGEMBANGAN PELABUHAN LAUT DI INDONESIA Edyanto, CB Herman
Jurnal Sains dan Teknologi Indonesia Vol. 12 No. 3 (2010)
Publisher : Badan Pengkajian dan Penerapan Teknologi

As an archipelagic country, Indonesia relies heavily on good sea transportation system to support national economic development, to achieve a sustainable logistical distribution system over the country and to help maintain the national unity. To achieve this goal, a good port system should be in place. Port is one of the most important urban facilities where people could continue their travel from one to another place. It is build for several purposes such as : trading, basic for military expansion , fishing, and travelling . But it was not much realized by the people that the establishment of port has an effect to the existence of regional economic development . There are 68 ports in Indonesia which are situated in five big islands namely Java, Sumatra, Kalimantan, Sulawesi, West Papua and two small islands namely : East Nusatenggara, and also West Nusatenggara. Four ports are identified as potential ports to be developed at national scale based on infrastructure sensitivity level for regional development

DESAIN PANDU GELOMBANG PARALEL TERISOLASI DENGAN METHOD OF LINES Syahriar, ary
Jurnal Sains dan Teknologi Indonesia Vol. 8 No. 3 (2006)
Publisher : Badan Pengkajian dan Penerapan Teknologi

Optical directional couplers are fundamental building components for the design ofoptical circuits. The proper treatment of a device that couples the guided modes ofa waveguide with the radiation in free space is particularly difficult because of thecontinuum nature of the radiating modes. The desire of high-density integrationposes additional problems due to the fact that the simplest used couplingstructures need to be quite large. In order to reduce the size of the device we studynon-periodic structures based on air gap isolated directional couplers, for whichadditional degrees of freedom are available. The analysis of this type of structuresrequires a rigorous method for the solution of the field equations. We employ themethod of lines for the computation of such coupler characteristics.

TSUNAMI ACEH 2004 SEBAGAI DASAR PENATAAN RUANG KOTA MEULABOH wisyanto, wisyanto
Jurnal Sains dan Teknologi Indonesia Vol. 13 No. 2 (2011)
Publisher : Badan Pengkajian dan Penerapan Teknologi

Tsunami which was generated by the 2004 Aceh eartquake has beenhaunting our life. The building damage due to the tsunami could be seenthroughout Meulaboh Coastal Area. Appearing of the physical loss wasclose to our fault. It was caused by the use dan plan of the land withoutconsidering a tsunami disaster threat. Learning from that event, we haveconducted a research on the pattern of damage that caused by the 2004tsunami. Based on the analysis of tsunami hazard intensity and thepattern of building damage, it has been made a landuse planning whichbased on tsunami mitigation for Meulaboh. Tsunami mitigation-based ofMeulaboh landuse planning was made by intergrating some aspects, suchas tsunami protection using pandanus greenbelt, embankment along withhigh plants and also arranging the direction of roads and setting of building forming a rhombus-shaped. The rhombus-shaped of setting of the road and building would reduce the impact of tsunamic wave. It is expected that these all comprehensive landuse planning will minimize potential losses in the future .

ANALISIS PENINGKATAN KESEMPATAN KERJA DI INDONESIA sunartono, sunartono
Jurnal Sains dan Teknologi Indonesia Vol. 10 No. 1 (2008)
Publisher : Badan Pengkajian dan Penerapan Teknologi

The problems of labor have influenced of many factors as such global market,regulation and goverment policy. Indicators of labor that a number used up till now were considered have some weakness. The result of this analysis was indicated the presents of sector performance variation and labor change viewed according to economic sectors. The demographic pressure to labor supply can be describe that population grow 1,7 percent per year at 2000-2005 period. Estimated the number higher that population grow of the time 2000-2005 is 1,3 percent per year and 2005-2009 is 1,1 percent per year. Many labor policy can be implemented to development and improve the skill and knowledge. A lot of the labor problems is multidimention properties can be solve by multidimention approaches. A number of external and internal factors of labor were also showed the various effect based on the many sectors. Therefore, to improve capacity of each sector will be needed policy intervention which to take care of the such as variation.

POTENSI DAN PERANAN PLTS SEBAGAI ENERGI ALTERNATIF MASA DEPAN DI INDONESIA Boedoyo, Mohamad Sidik
Jurnal Sains dan Teknologi Indonesia Vol. 14 No. 2 (2012)
Publisher : Badan Pengkajian dan Penerapan Teknologi

The success of national development will not be separated from the role of energy supply as a supporting facilitiy, as well as electricity. Given the potential of oil and gas energy are depleted, while coal which is abundant potential reserve but could bring a negative impact to the environment, the development of renewable energy resources for power generation is solution to achieve the national energy security. The utilization potential of solar power for electricity generation is a promising alternative, because a clean environment, unlimited resources and is available throughout the country. The tendency of diminishing the photovoltaic electricity generation cost as well as a variety of its applications to become a positive effect in the development of photovoltaic electricity generation. Integration of PLTS into the National Electrical system will require its own development strategy.

APLIKASI GEOMAGNET UNTUK EKSPLORASI BIJIH BESI DI DAERAH KACANG BOTOR, KABUPATEN BELITUNG BARAT Zaidan, Moh
Jurnal Sains dan Teknologi Indonesia Vol. 11 No. 2 (2009)
Publisher : Badan Pengkajian dan Penerapan Teknologi

Iron ore is one of commodity of metallic mineral that is located in Belitung Barat, Bangka Belitung Province. Existence of iron ore can be detected by applying a technology of geomagnet exploration using a magnetic characteristic of iron ore at study area. In this paper, it will be discussed about application of geomagnet for exploring iron ore at Kacang Botor area. Based on result of Geomagnet measurement and data processing, it can be interpretated that Kacang Botor area has prospect of iron ore (Fe) reserve, where contur of magnetic anomaly has a value of about 500 nT - 4000 nT. In a ddition, it can be predicted that iron ore at this area point to type of vein with direction of its distribution is west – east. This fact is suitable with commonly linement of iron ore deposit in belitung island.

Pengaruh Intensitas Naungan Dalam Aklimatisasi Pertumbuhan Planlet Gaharu (Aquilaria beccariana) Mulyono, Daru
Jurnal Sains dan Teknologi Indonesia Vol. 16 No. 1 (2014)
Publisher : Badan Pengkajian dan Penerapan Teknologi

The objective of this research is to know the optimal shading intensity in the acclimatization of Gaharu planlet growth (Aquilaria beccariana). The research was carried out in Agroindustry and Biotechnology Laboratory, Ciampea, Bogor, West Java from February to April 2007. The research used Complete Randomized Design in order to know the effect of shading net treatment: P1 (shading intensity 25 %), P2 (shading intensity 55 %), and P3 (shading intensity 75 %). The results of the research showed that after eight weeks of planting with the treatment of shading intensity 55 % was significantly better than shading intensity 25 % and shading intensity 75 % to the growth of Gaharu planlet in terms of plant heigh, sum of leaf, sum of root, and length of root.Penelitian ini bertujuan untuk mengetahui intensitas naungan yang optimal dalam aklimatisasi pertumbuhan planlet GaharuÃ‚Â (Aquilaria beccariana).Ã‚Â Penelitian ini dilaksanakan di Laboratorium Agroindustri dan Bioteknologi, Ciampea, Bogor, Jawa Barat mulai Februari sampai April 2007. Penelitian ini menggunakan Rancangan Acak Lengkap untuk mengetahui pengaruh perlakuan naungan: P1 (intensitas naungan 25 %), P2 (intensitas naungan 55 %), dan P3 (intensitas naungan 75 %). Hasil penelitian menunjukkan bahwa setelah delapan minggu penanaman dengan perlakukan intensitas naungan 55 % memberikan hasil yang lebih baik dibandingkan dengan intensitas naungan 25 % dan intensitas naungan 75 % terhadap pertumbuhan planlet Gaharu dalam tinggi tanaman, jumlah daun, jumlah akar, dan panjang akar.Keywords: Gaharu, shading, acclimatization

Unjuk Kerja dan Emisi Gas Asap Genset Berbahan Bakar Biodiesel FAME -, Prawoto; Haryono, Ihwan
Jurnal Sains dan Teknologi Indonesia Vol. 17 No. 3 (2015)
Publisher : Badan Pengkajian dan Penerapan Teknologi

This paper describes performance and durability test results of three parallel stationary diesel engine using fatty acid methyl ester biodiesel blend fuel with composition B10 (10% biodiesel FAME), B15 (15% biodiesel FAME), and B0 (100% regular diesel fuel) as a baseline. Each engine was tested during 1000 hours. Performance and smoke test without generator was conducted on engine dynamometer before and after durability according to the National Standard of Indonesia. Performance test with variable load also conducted with generator attached using lamps as dummy load. Test result showed that all of three engines with difference fuel have relatively identical performance and not seen any significant decrease in performance during 1000 hour endurance test. Comparing to the B0, fuel consumption of B10 and B15 was higher in average of 1.4 % and 2.4 %, where are smoke emission decrease in order of 4.5% to 22.5%. For setting the engine at standard conditions, the best performance obtained for a mixture of 10% biodiesel (B10).Pada Makalah ini disampaikan hasil penelitian uji unjuk kerja dan ketahanan pada tiga mesin diesel stasioner (generator set) secara paralel dengan menggunakan bahan bakar campuran biodiesel-solar dengan komposisi B10 (10% biodiesel FAME), B15 (15% biodiesel FAME), dan B0 (100% solar) sebagai pembanding, masing-masing diuji selama 1000 jam. Uji unjuk kerja dan emisi gas asap mesin tanpa generator dilakukan pada engine dynamometer baik sebelum maupun sesudah uji ketahanan. Pengujian unjuk kerja dengan variasi beban dan generator terpasang juga dilakukan dengan menggunakan lampu sebagai beban. Hasil uji menunjukkan bahwa ketiga mesin dengan bahan bakar berbeda mempunyai unjuk kerja yang relatif identik dan tidak terlihat adanya penurunan unjuk kerja yang berarti selama uji ketahanan 1000 jam. Secara rata rata dibandingkan dengan B0, konsumsi bahan bakar Genset dengan B10 dan B15 lebih tinggi masing-masing sebesar 1,4 % dan 2,4 %, sedangkan emisi gas asap menurun antara 4,5 % sampai dengan 22,5 %.Untuk setting mesin pada kondisi standar, kinerja terbaik untuk campuran biodiesel 10% (B10).Keywords: Biodiesel, engine performance, durability, exhaust gas emission.

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