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JURNAL SAINS DAN TEKNOLOGI INDONESIA

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Articles 236 Documents

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ANALISIS KERUSAKAN PIPA BAJA HP- MODIFIED UNTUK PADA INDUSTRI MIGAS hatta, ilham
Jurnal Sains dan Teknologi Indonesia Vol. 15 No. 2 (2013)
Publisher : Badan Pengkajian dan Penerapan Teknologi

Pipa baja hydrogen plant yang terdapat pada unit pengolahan minyak dan gas meledak / pecah setelah dioperasikan selama kurang lebih 5 tahun. Pada saat ledakan terjadi ada 8 batang pipa hydrogen plant mengalami kerusakan dari 144 batang pipa yang terpasang pada sisi barat. Sedangkan pada sisi timur juga terdapat 144 batang pipa, hanya saja tidak satupun yang mengalami kerusakan pada saat terjadi ledakan. Pipa yang terpasang pada hydrogen plant terbuat dari baja paduan tinggi tipe HP-Modified. Berdasarkan pendekatan ilmu bahan, maka metode analisis kerusakan yang digunakan, adalah makro fraktografi, metalografi, komposisi kimia dan uji kekerasan. Hasil analisis menunjukkan bahwa pipa tersebut rusak akibat faktor panas setempat yang berlebihan dan adanya pengaruh pendinginan yang sangat cepat.

APLIKASI TEKNOLOGI LASERPUNKTUR DALAM MENINGKATKAN LIBIDO PEJANTAN DOMBA GARUT (Ovis Aries) herdis, herdis
Jurnal Sains dan Teknologi Indonesia Vol. 12 No. 1 (2010)
Publisher : Badan Pengkajian dan Penerapan Teknologi

Libido can be measured by the length of time needed by the ram from teasing ewes to ejaculation. Low libido is one inefficient factor in reproductive process of sheep. The research was carried out to assess the application of laserpuncturetechnology for increasing libido of Garut rams. Results of the research showed that from three ejaculations observed, the ram which was treated with laserpuncture was more responsive in its libido than control. At the first ejaculation, the ram which was treated with laserpuncture needed 20.67 seconds and more responsive than control 35,40 seconds. At the second ejaculation, the laserpuncture treated needed 85 seconds to responsif than control 129,2 seconds. At the third ejaculation, the laserpuncture treated needed 198,6 seconds to responsif than control 209 seconds. In conclusion, laserpuncture at six acupoints in Garut rams can improve libido.

MODEL KELEMBAGAAN KAWASAN METROPOLITAN DI INDONESIA warseno, warseno
Jurnal Sains dan Teknologi Indonesia Vol. 13 No. 1 (2011)
Publisher : Badan Pengkajian dan Penerapan Teknologi

Metropolitan area in Indonesia is growing as fast as population’s growth andeconomic activities that go along with agglomeration process in all aspects inexisting big cities such as Jakarta, Surabaya, Medan, Bandung, Makassar andothers. It is pity that trend of functional urban growth is not anticipated and early prepared with setting up the metropolitan institution that optimally and effectively manage the development and growth of the big cities in Indonesia. To anticipate, it is needed model of the metropolitan institution appropriate with valid law and regulations.

RANCANGAN DASAR GASIFIER BATUBARA SIRKULASI UNGGUN MENGAMBANG UNTUK MEMBANGKITKAN LISTRIK 1 MW Rahardjo, Bambang Suwondo; Sutrisna, I Putu
Jurnal Sains dan Teknologi Indonesia Vol. 9 No. 2 (2007)
Publisher : Badan Pengkajian dan Penerapan Teknologi

There are 3 choices in accommodating power station facility which have been installed to fulfill standard regulation of environmental quality which progressively tighten. Firstly, facility modification of pulverized–coal fired power plant by applying a flue–gas desulfurisation technology throw away to cost money installation of tired which can 20% of total cost development of it. Secondly, modification system of coal fired power generation become natural gas combined cycle (NGCC) can reach low emission, but fuel cost relatively high, so will influence the electricity generating cost. Third, modification system of electric generation which have been installed by utilizing a mechanism of coal gasification is most efficient and best alternative to yield an environmental friendly of electric generation combined cycle. In this paper, writer try to make a basic design of circulating fluidized–bed coal gasifier using clay catalist related on third choice which expected applicable in the next future to come replace power station system which have ended a period as well as newly even if.

ANALISIS FAKTOR PENENTU INOVASI TEKNOLOGI DI INDUSTRI PANGAN vidyatmoko, dyan; Rosadi, Husni Yasin; susetyanto, susetyanto; Hastuti, Pudji; Zubair, Manifas
Jurnal Sains dan Teknologi Indonesia Vol. 14 No. 1 (2012)
Publisher : Badan Pengkajian dan Penerapan Teknologi

Despite the fact that technological innovation and its role in the economic growth of developed countries have been much studied, but there is only little knowledge about the factors that determine technological innovation in Indonesia. In an effort to fill this gap, this study is conducted with the aim to analyze the factors that affect innovation in the food industry inIndonesia. Analytical methods used to achieve the research objective are regression analysis with 2 SLS (Two Stage Least) method and qualitative analysis. The results showed that there sixteen factors that influence technological innovation in the Indonesian food industry. By usingfurther 2 SLS method, empirical observation, in-depth interviews and discussions with experts, it is obtained the strong of technological innovation determinants to enhance technological innovation in the food industry. The determinants include the style of leadership, human capital,learning orientation, the company's ability to provide incentives / rewards, company relationships with outsiders and corporate location.

PEMANDU CAHAYA MATAHARI UNTUK PENCAHAYAAN ALAMI DI BANGUNAN fachrizal, N
Jurnal Sains dan Teknologi Indonesia Vol. 10 No. 3 (2008)
Publisher : Badan Pengkajian dan Penerapan Teknologi

Daylighting is the use of natural light to provide illumination in buildings during the day. This reflector tunnel modul is designed to transmit natural light (direct sun rays and sky light) to provide illumination in the building. This modul consist of 4 components, receiver, transmitter, elbow beam deflector and emerging component. 2 mm glass mirror are laminated inside all squared profile tunnel, reflecting and transmitting incident natural rays and emerging them into the room. This modul uses common glass mirror. The receiver is covered by doom which function as light collector, particularly for rays come at the wide angle. The emerging component is covered by diffuse flat glass for reducing glare and obtaining more comfortable light. Average light track inside modul is about 1.125 m. This light guide modul is installed in the chamber during performance tests are carried out. Performance tests show that the average light attenuation of 0.77 dB/m is resulted. Some problems still remain tobe solved to apply this modul commercially, such as : replacing glass mirror by metal substances, technical and cost of fabrication, maintenace and installation matters, and estetical values that must be added.

PENERAPAN TEKNOLOGI BiTumMan UNTUK MENGATASI LAHAN KRITIS PASCA PENAMBANGAN (Studi Kasus di Bekas Tambang Nikel) Sittadewi, Euthalia Hanggari
Jurnal Sains dan Teknologi Indonesia Vol. 15 No. 1 (2013)
Publisher : Badan Pengkajian dan Penerapan Teknologi

Upaya revegetasi lahan pasca penambangan selama ini belum memberikan hasil yang optimal karena terkendala oleh kondisi lahannya.Teknologi BiTumMan (Biji Tumbuh Mandiri) dapat membantu mengatasi permasalahan ini. Tujuan dari penelitian ini adalah penerapan BiTumMan untuk media tanam sengon (Paraserianthes falcataria) pada lahan terdegradasi pasca penambangan nikel dengan metodologi survei, analisis tanah serta penanaman sengon dengan media BiTumMan secara konvensional. Biji sengon yang dilapisi dengan bio-fertilizer Arbuscular Mycorrhizal Fungi (AMF) dan Rhizosphere Bacteria mempunyai efek positif terhadap pertumbuhan akar dan pertumbuhan selanjutnya. Keuntungan lain dari penerapan teknologi BiTumMan yaitu tidak membutuhkan biaya pembibitan dan biaya transportasi bibit.

PREDIKSI KANDUNGAN NITROGEN DAUN PADI DENGAN ANALISIS PERGESERAN TEPI KANAL MERAH (RED EDGE SHIFT) DATA HIPERSPEKTRAL nadirah, nadirah; Muljosukojo, Bangun; Hariyanto, Teguh; Sadly, M; Evri, M; mulyono, Sidik
Jurnal Sains dan Teknologi Indonesia Vol. 11 No. 3 (2009)
Publisher : Badan Pengkajian dan Penerapan Teknologi

Canopy hyperspectral with various growth stages measured by using field spectroradiometer (350 - 1000 nm) corresponded to leaf Nitrogen content of three rice cultivars (Ciherang, Cilamaya and IR64) during growth season in Java Island,Indonesia. Coinciding with hyperspectral measurement, biochemical parameter such as leaf Nitrogen content (g/100 gr) was analyzed from destructive biomass sample through laboratory analysis. The potential narrow band in the red edgeregion was investigated to predict leaf nitrogen content (N content) with applying modified polynomial interpolation (MPI) and modified four points linear interpolation (MFLI) methods. First derivative reflectance derived from reflectance data andsubsequently used in analysis of Red Edge Position (REP). The correlation REPMFLI was generally stronger than REP-MPI attributed to leaf N content for several level of N application that indicated by value of R2. The response of REP-MFLItoward N level 69 kg/ha exhibited the most significant correlation (R2 = 0.754) than other correlations. Meanwhile, the response of REP-MPI toward N level 161 kg/ha denoted the most significant correlation (R2 = 0.8) than other correlations. The highest correlation using REP-MPI (R2 = 0.8) to predict leaf N contentdemonstrated slightly higher than that of REP- MFLI (R2 = 0.754). In general both REP-MFLI and REP-MPI represented somewhat similar response toward N levels, such as 103.5 kg/h, 115 kg/ha. The exploration of characteristics of red edge shiftis a fundamental point in developing rapid and precise prediction for biochemical parameter. In addition, its prediction capability was promising to support crop farming management.

Perbaikan Manajemen Pemeliharaan Dan Suplementasi Probiotik Bioplus Pada Sapi BX Meningkatkan Nilai Kondisi Tubuh Sebagai Induk Calon Resipien Transfer Embrio Kembar Fariani, Armina; Priyanto, Langgeng; Abrar, Gatot Muslimdan Arfan
Jurnal Sains dan Teknologi Indonesia Vol. 17 No. 1 (2015)
Publisher : Badan Pengkajian dan Penerapan Teknologi

This research was done to identifiy Brahman cross (BX) cow as candidate of twinning embryo transfer recipient. However, BX cow oftenly reported low in reproduction performance especially from cattle farmer. The conditionwas assumed related to its management and feeding system. Body score condition (BCS) was one of quality parameters in cow. Therefore, enhancement of BCS through management improvement and probiotic BIOPLUS suplementation on BX cows would increase quality of twinning embryo transfer recipient candidate.Identification of production system, body score condition and reproduction organ of twenty BX cow were held in SidomulyoVillage, Banyuasin I District and Banyuasin Regency. Improvement on management production and suplementation of Probiotic BIOPLUS were done for 2 months. The result shows that only 13 of 20 cows were fulfill the requirement of twinning embryo transfer recipient candidate with body score condition were 3-4, 21-24 days of estrous cycle and improvement on reproduction organ performance.Penelitian ini bertujuan untuk mengidentifikasi calon induk resipien transfer embrio kembar. Namun, induk sapi BX sering kali dilaporkan memiliki performans reproduksi yang rendah, terutama yang dipelihara oleh peternak rakyat. Hal ini diduga berkaitan dengan system pemeliharaan dan pemberian pakan. Nilai Kondisi Tubuh (NKT) adalah salah satu parameter kualitas induk. Peningkatan NKT melalui perbaikan manajemen dan suplementasi probiotik BIOPLUS pada induk BX diharapkan akan meningkatkan kualitas calon induk resipien transfer embrio kembar. Dua puluh ekor induk BX yang ada di Desa Sidomulyo, Kecamatan Banyuasin I Kabupaten Banyuasin diidentifikasi sistem produksi, NKT dan organ reproduksinya. Perlakuan perbaikan manajemen produksi dan suplementasi probiotik BIOPLUS dilaksanakan selama 2 bulan. Hasil penelitian menunjukkan bahwa hanya 13 dari 20 induk BX yang memenuhi persyaratan sebagai calon resipien transfer embrio kembar dengan rataan NKT 3-4, siklus berahi 21- 24 hari dan perbaikan pada kesehatan organ reproduksi.Keywords: BX cow, twinning cattle, embryo transfer, probiotic.

PENGEMBANGAN Ã¢â‚¬ÂREAL TIME TRAFFIC INFORMATION SYSTEMÃ¢â‚¬Â BAGI PENGGUNA JALAN suyuti, rusmadi
Jurnal Sains dan Teknologi Indonesia Vol. 12 No. 3 (2010)
Publisher : Badan Pengkajian dan Penerapan Teknologi

Traffic information condition is a very useful information for road user because road user can choose his best route for each trip from his origin to his destination. The final goal for this research is to develop real time traffic information system for road user using real time traffic volume. Main input for developing real time traffic information system is an origin-destination (O-D) matrix to represent the travel pattern. However, O-D matrices obtained through a large scale survey such as home or road side interviews, tend to be costly, labour intensive and time disruptive to trip makers. Therefore, the alternative of using traffic counts to estimate O-D matrices is particularly attractive. Models of transport demand have been used for many years to synthesize O-D matrices in study areas. A typical example of the approach is the gravity model; its functional form, plus the appropriate values for the parameters involved, is employed to produce acceptable matrices representing trip making behaviour for many trip purposes and time periods. The work reported in this paper has combined the advantages of acceptable travel demand models with the low cost and availability of traffic counts. Two types of demand models have been used: gravity (GR) and gravity-opportunity (GO) models. Four estimation methods have been analysed and tested to calibrate the transport demand models from traffic counts, namely: Non-Linear-Least-Squares (NLLS), Maximum-Likelihood (ML), Maximum-Entropy (ME) and Bayes-Inference (BI). The Bandung’s Urban Traffic Movement survey has been used to test the developed method. Based on several statistical tests, the estimation methods are found to perform satisfactorily since each calibrated model reproduced the observed matrix fairly closely. The tests were carried out using two assignment techniques, all-or-nothing and equilibrium assignment.

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