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JURNAL SAINS DAN TEKNOLOGI INDONESIA

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Articles 236 Documents

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ANALISIS UNJUK KERJA KOLEKTOR UDARA PENGERING KAYU BERSUMBER ENERGI SURYA - BIOMASSA Sumarsono, Markus; Mustafa, Rivai
Jurnal Sains dan Teknologi Indonesia Vol. 10 No. 3 (2008)
Publisher : Badan Pengkajian dan Penerapan Teknologi

A solar air-heating collector having a surface area of 230.4 m2 has been installed and integrated to a drying chamber to dry wood of 100 m3. The collector was classified as a matrix type collector with its absorber was made from black carbon fiber sheet. Collector worked together with a biomass boiler to supply heat to dryingchamber. The test results indicated that the thermal efficiencies of collector per batch were around 20%-31%.

EMISI KARBON SEBAGAI DASAR IMPLEMENTASI PENYEDIAAN RUANG TERBUKA HIJAU DI DKI JAKARTA Edyanto, CB Herman
Jurnal Sains dan Teknologi Indonesia Vol. 15 No. 1 (2013)
Publisher : Badan Pengkajian dan Penerapan Teknologi

Emisi adalah salah satu dari beberapa aspek lingkungan yang berbahaya yang dapat berdampak terhadap perubahan global di dunia. Bahan bakar minyak yang digunakan dalam infrastruktur transportasi dikenal sebagai hal yang paling utama yang menghasilkan intensitas emisi yang tinggi bagi kota besar seperti Jakarta .Dampak yang nyata adalah dengan tingginya jumlah penduduk yang menderita sakit dari polusi udara. Tutupan lahan atau kota hijau, termasuk apa yang disebut sebagai 'hutan kota’ atau ruang terbuka akan memberikan harapan baru di masa depan sebagai unsur kota untuk mengurangi polusi udara dan emisi.Metoda analisis dilakukan dengan melakukan koleksi dan analisis data sekunder mengenai produksi karbon dioksida yang dihasilkan dari beberapa kegiatan perkotaan seperti penggunaan listrik dan bahan bakar di Jakarta.Transportasi dan kebutuhan tenaga listrik merupakan kebutuhan pokok masyarakat perkotaan, namun memiliki dampak yang terbesar terhadap produksi karbon dioksida diudara.Ketersediaan ruang terbuka yang luas serta kebijakan efisiensi energi harus menjadi salah satu agenda pemerintah pusat dan daerah merupakan solusi utama untuk mengatasi masalah.

MENGHITUNG KEBUTUHAN PENGERING GABAH DI KECAMATAN CIOMAS BOGOR DENGAN METODE MONTE CARLO Manalu, Lamhot P.
Jurnal Sains dan Teknologi Indonesia Vol. 11 No. 3 (2009)
Publisher : Badan Pengkajian dan Penerapan Teknologi

Sun drying is the traditional method for drying and still preferred in Asia because cheap compared to mechanical drying. Since it uses the sun as heat source it is friendly to the environment, many farmers, grain collectors, traders and millersoften dry their paddy on pavements that specifically constructed for drying. Sundrying pavements have the advantages of high capacity and thus economics of scale, but the weakness is very dependent on the weather. The amount of paddy that can be dried with a drying depends on the number of sunny days, so it is important to know the probabilities of rainy day based on the historical climate data in a region. From these, simulations can be done to calculate how many dryer machines should be provided to overcome the lack of drying capacity. This methodis known as Monte Carlo. This paper presents a study to determine the amount mechanical dryer needed based on the failure probability of sun drying pavements using monte carlo simulation methods in the District of Ciomas, Bogor.The study results based on 10 years daily rainfall data the probability of rainy days in March (0.62) was greater than in September (0,37), so that the total capacity of dryer machine to be prepared is 110 tons/ day. That was equal to 11 units dryerswith 10 tons / unit in capacity.

Potensi Covercrop Kebun Sawit Sebagai Sumber Pakan Hijauan Ternak Ruminansia Pada Musim Kemarau di Pelalawan, Riau Gopar, Ruslan A.; Martono, S.; Rofiq, Muhamad N.; N., Windu
Jurnal Sains dan Teknologi Indonesia Vol. 17 No. 1 (2015)
Publisher : Badan Pengkajian dan Penerapan Teknologi

The objective of this experiment was to obtain forage/ cover crops productivity and carrying capacity for ruminant animals in Pelalawan Regency, Riau in the dry season. Data were collected from civil palm oil plantations at the aged 7, 10 and 14 years in the end of dry season with a destructive sampling method. Sampling used line intercept method which every hectare were picked 10 points by using a pair of 1 m2Ã‚Â sized quadrant. The result showed that the number of vegetations/ cover crops in oil palm plantations aged 7, 10 and 14 years was 42 types.The proportion of forage which consist grass, legume and ferns was diverse at each age of oil palm plantations. Forage production under oil palm plantations aged 7, 10 and 14 years were 2,571 kg/ha, 1479.76 kg/ha and 1417.22 kg/ha as fed and amounted to 811.41 kg/ ha, 471, 15 kg/ ha and 456.91 kg/ ha in the dry matter production. Average carrying capacities of oil palm plantations aged 7, 10 and 14 years was 0.36 Animal units (AU)/ha/year, 0.21 AU/ha/year and 0.20 AU/ ha/year.Penelitian ini bertujuan untuk mengetahui potensi jumlahÃ‚Â covercropÃ‚Â dan kapasitas tampungnya di kebun sawit sebagai sumber pakan hijauan ruminansia pada musim kemarau di kabupaten Pelalawan, Riau. Pengambilan data dilakukan di perkebunan kelapa sawit yang berumur 7, 10 dan 14 tahun milik rakyat pada akhir musim kemarau. Pengambilan sampel denganÃ‚Â destructive sampling methodÃ‚Â menggunakan metode garis berpetak memakai kuadran berukuran 1m2Ã‚Â dengan jumlah sampel tiap area sebanyak 10 titik. Berdasar hasil pengukuran diperoleh hasil jumlah vegetasi/Ã‚Â covercropÃ‚Â yang ada di kebun sawit berumur 7, 10 dan 14 tahun sebanyak 42 jenis yang bervariasi tiap umur tanaman sawit. Proporsi hijauan yang ada meliputi jenis rumput,Ã‚Â legumeÃ‚Â dan paku-pakuan bervariasi pada tiap umur kebun sawit. Produksi hijauan yang ada di bawah kebun sawit berumur 7, 10 dan 14 tahun berturut-turut 2.571 kg/ha, 1.479,76 kg/ha dan 1.417,22 kg/ha dalam bentuk segar serta sebesar 811,41 kg/ha, 471,15 kg/ha dan 456,91 kg/ha dalam bahan kering. Kapasitas tampung dari kebun sawit berumur 7, 10 dan 14 tahun adalah 0,36 satuan ternak (ST)/ha, 0,21 ST/ha dan 0,20 ST/ha.Keywords: cover crops, oil palm plantation, forage, ruminant, dry season, Pelalawan

UJI TARIK HIDRODINAMIKMODEL KAPAL BERSAYAP WiSE DENGAN LAMBUNG DASAR BERSTEP Iskendar, Iskendar; Jamaludin, Andi; Indiyono, Paulus
Jurnal Sains dan Teknologi Indonesia Vol. 12 No. 3 (2010)
Publisher : Badan Pengkajian dan Penerapan Teknologi

This paper describes hydrodynamic model tests of Wing in Surface Effect (WiSE) Craft. These craft was fitted with stephull form in different location on longitudinal flat bottom (stepedhull planning craft) to determine the influences of sticking and porpoising motion performances. These motions are usually occured when the craft start to take-off from water surfaces. The test models with scale of 1 : 7 were comprised of 4 (four) stephull models and 1 (one) non-stephull model as a comparative study. The hydrodynamic tests were performed with craft speed of 16 – 32 knots (prototype values) in Towing Tank at UPT. Balai Pengkajian dan Penelitian Hidrodinamika (BPPH), BPPT, Surabaya. The resistance (drag) was measured by dynamo meter and the trim of model (draft changing at fore and aft of model due to model speed) was measured by trim meter. By knowing the value of model trim, the wetted surface area can be determined. Then, the lift forces were calculated based on these measured values. The model test results were presented on tables and curves. Test results show that models with step located far away from center of gravity of the WiSE craft tend to porpoising and sticking condition, except if the step location on the below of these center of gravity. While model without step tends to sticking conditions.

PEMANFAATAN DATA SATELIT ADEOS UNTUK PEMANTAUAN KESUBURAN PERAIRAN DAN IDENTIFIKASI DAERAH PENANGKAPAN IKAN Sachoemar, Suhendar I
Jurnal Sains dan Teknologi Indonesia Vol. 8 No. 3 (2006)
Publisher : Badan Pengkajian dan Penerapan Teknologi

Sea Surface Temperature (SST) and Chlorophyll-a (SSC) can be detected by Ocean Color and Thermal Scanner (OCTS) derived from the Advance Earth Observation Satellite (ADEOS) sensor. These parameters are useful to estimate the potential fishing ground by identification of the upwelling and marine productivity on the study of fisheries oceanography within the tropical area of Indonesia.

RESPON ESTRUS DOMBA GARUT BETINA PADA PERLAKUAN LASERPUNTUR DENGAN FASE REPRODUKSI YANG BERBEDA herdis, herdis
Jurnal Sains dan Teknologi Indonesia Vol. 13 No. 3 (2011)
Publisher : Badan Pengkajian dan Penerapan Teknologi

The research was carried out to assess the technology of laserpuncture for estrous synchronization of ewes in different phase reproduction. The results of the research showed that the treatment of laserpuncture at 17 reproduction accupoints during the luteal phase and at anytime perform 100% and 95% of oestrous, respectively. It indicates that the laserpunktur technology is capable to generates a synchronization of oestrus in ewes. There was no significant difference of oestrus response which observed from both of treatments at luteal phase or at any time. It is concluded that the laserpuncture technology is one of alternative technology for estrous synchronization beside hormone treatment.

STUDI KESUBURAN TANAH DAN ANALISIS KESESUAIAN LAHAN UNTUK KOMODITAS TANAMAN PERKEBUNAN DI KABUPATEN BENGKALIS Soewandita, Hasmana
Jurnal Sains dan Teknologi Indonesia Vol. 10 No. 2 (2008)
Publisher : Badan Pengkajian dan Penerapan Teknologi

Soil fertility is important factor for land management to develop agriculture commodities. With the information of soil fertility condition, then land potension for agriculture plant can beknown. Nutrient content in soil and information of land ecology characteristics, then limited factor of plant growth can be soluted with an exact fertilizing doze, amelioration treatment,drainage/irrigation etc. Soil characteristic in Bengkalis District, Soil acidity (pH) is high acid. This condition has influence to cations so difficult to exchange, cation exchane capacity (KTK) is low. Inspite of that, macro nutrient e.g total N, K2O and P2O5 are fluctuative. Analysis of land suitability for plantation plant commodity development show that land has moderately suitable (S2), marginally suitable (S3) and not suitable (N). Land area with S3 classification has greater area than S2 and N classification.

UJI INOKULASI Fusarium sp UNTUK PRODUKSI GAHARU PADA BUDIDAYA A. Beccariana iskandar, dudi; suhendra, ahmad
Jurnal Sains dan Teknologi Indonesia Vol. 14 No. 3 (2012)
Publisher : Badan Pengkajian dan Penerapan Teknologi

Gaharu (Agarwood) is one of the most valuable of non-timber forest products (NTFPs) commodities in Indonesia that has an important role in economic and income for the community surrounding forest. However, the intensive exploitation and uncontrolled harvest capacity has brought those two potential species tends to decrease, and therefore gaharu is listed in the list of the CITES’ Appendix II. One of the solutions to deal with those cases researchers have been developing gaharu plantation as well technique to produce gaharu products through inoculation. Theaim of this study was to find the effectiveness of four different Fusarium sp from different locations in Indonesia (Parung/F1, Banjarmasin/F2, Jambi/F3 and Gorontalo/F4) in order to produce gaharu. These Fusarium were inoculated to 10 year’s old of A. Beccariana at Penajam, East Kalimantan. The result show that inoculant from Gorontalo (F4) gave the best result and the highest potential to the production of gaharu compare to other Fusarium sp.

UPAYA KEMANDIRIAN DALAM PENYEDIAAN FLARE BAGI TEKNOLOGI HUJAN BUATAN Haryanto, MSi, APU, Prof. Drs. Untung; Goenawan, R. D
Jurnal Sains dan Teknologi Indonesia Vol. 11 No. 2 (2009)
Publisher : Badan Pengkajian dan Penerapan Teknologi

System production of small scale flare fabrication has been developed. System consist of three main apparatus ie. ball mill, compactor, and dryer oven. Products of flare have good quality on high performance of burning, long live of storage, and water resistant. Test particle after burning on BATAN laboratory shows that particles diameter range is 1.1 – 5.7 micron. This is the best spectrum of ultra giant nuclei to modifying warm cloud to enhance precipitation. The user of the flare production from this small scale fabrication is UPT Hujan Buatan BPPT, which will use for cloud seeding operasional base on flare device. This effort will strengththening the capability UPT Hujan Buatan on the selfempowerment on cloud seeding device production.

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