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Widyariset
Published by Pusbindiklat Peneliti LIPI
ISSN : -     EISSN : 24610976     DOI : 10.14203
Core Subject : Science, Engineering,
Aerospace Engineering Astronomy Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Electrical & Electronics Engineering Energy Engineering Immunology & microbiology Industrial & Manufacturing Engineering Library & Information Science Materials Science & Nanotechnology Mechanical Engineering Neuroscience Physics
Widyariset is a scientific journal which publishes the results of research and development, assessment, and systematic thinking about Natural Science.
Arjuna Subject : Umum - Umum
Articles 476 Documents
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FABRICATION OF STEAM TURBINE SIMULATOR BASED ON FUZZY LOGIC Syukri Yusuf Nasution
Widyariset Vol 14, No 3 (2011): Widyariset
Publisher : Pusbindiklat - LIPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/widyariset.14.3.2011.683-691

Abstract

A steam turbine simulator has built successfully. This simulator has 2 types, hardware and software simulator. For the hardware simulator, the pressure input can be simulated until 8 bar. While for the software simulator has 2 specifi  cations those are off-line mode and on-line mode. For off-line mode, this software given numbers as input, and then the numbers simulated according to the formulas. For on-line mode, interface method used to read and control the system hardware directly. The result of on-line mode displayed in real-time graphic. All systems using fuzzy logic as artifi  cial intelligent.
ANALYSIS OF SEX-RATIO BY LENGTH CLASS OF BIGEYE TUNA (Thunnus obesus) IN THE INDIAN OCEAN Bram Setyadji; Andi Bahtiar; Budi Nugraha
Widyariset Vol 15, No 3 (2012): Widyariset
Publisher : Pusbindiklat - LIPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/widyariset.15.3.2012.593–598

Abstract

By far the information about Indian Ocean big eye tuna biology and fisheries especially in Indonesia is still verylimited. This paper is an attempt to give some information of the biological observations, especially sex ratio of bigeye tuna(BET) in Indian Ocean. Surveillance was conducted by scientific observers on March–April, 2010 following twocommercial tuna longline vessels based in Port of Benoa. Total 159 of BET managed to be hauled and observed.The result showed that sex ratio of male and female BET was 1:1.12 and study indicated small size (60–100cm) and large size (140–160 cm) of BET comprise of male more than female; while middle size (100–140 cm)dominated by female rather than male. In addition most BET caught were already reached their sexual maturity.
IDENTIFIKASI Fase KOMPOSIT OKSIDA BESI - ZEOLIT ALAM HASIL PROSES MILLING Yosef Sarwanto; Grace Tj.S.; - Mujamilah
Widyariset Vol 13, No 3 (2010): Widyariset
Publisher : Pusbindiklat - LIPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/widyariset.13.3.2010.141–147

Abstract

Iron oxide – nature zeolite composite has been obtained by using milling process with varied milling time of 1.5 hours, 4.5 hours, 9 hours, and 13.5 hours. Weight ratio of iron oxide to nature zeolite was set to 1:1. The resultof milling process was identified using X-ray diffraction (XRD) technique, then compared the pattern to JCPDSICDD (Joint Committee on Powder Diffraction Standard - International Centre for Diffraction Data) data base.XRD pattern of the composite showed that α-Fe2O3 phase growth with increasing milling time from 1.5 hours to 13.5 hours milled as a result of Fe3O4 oxidizing. Visual observation was done to know the binding of iron oxide to nature zeolite by immersing the composite in water media and attracting with magnetic field.
THE SCENARIO IMPACT OF LOCAL CIGARETTE TAX TO GOVERNMENT’S FISCAL AND ECONOMIC Muhammad Yusmal Nikho
Widyariset Vol 14, No 1 (2011): Widyariset
Publisher : Pusbindiklat - LIPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/widyariset.14.1.2011.25-34

Abstract

This research is addressed to improve the preparation of implementing local cigarette tax in January 2014. This research will discuss the impact of cigarette tax to the government’s fiscal and economic by applying several alternative scenarios of cigarette tax. Quantitative methodology is used to calculate its impact on the government’s fiscal and economic (using I-O analysis). The result showed that the application of the cigarette tax would reduce cigarette consumption and production, increase total government revenue from tobacco products, reduce the central government’s net revenue from the tobacco excise tax, increasing the total revenue and spen ding of provincial government significantly, reduce fiscal capacities inequality among provincial government, as well asincreasing output, income, and employment.
INDONESIAN TRADE PERFORMANCE WITHIN ASEAN FREE TRADE AREA (AFTA): INTRA-INDUSTRY TRADE ANALYSIS Heru Wibowo
Widyariset Vol 16, No 1 (2013): Widyariset
Publisher : Pusbindiklat - LIPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/widyariset.16.1.2013.11-22

Abstract

SEAN has moved forward by establishing the ASEAN Free Trade Area (AFTA) in 28 January 1992. The main objective of AFTA is to promote ASEAN countries competitive advantages by eliminating tariff and non-tariff barrier under AFTA’s Common Effective Preferential Tariff (CEPT) scheme. Indonesia participation in AFTA is worth noting since CEPT covers significant amount of Indonesian exports and imports. This paper investigates Indonesia trade performances under AFTA employing intra-industry trade analysis. It uses three digit SITC derived from UN COMTRADE. The results show that during 1992–2010, Indonesia and ASEAN trade was highlighted by intra rather than inter-industry trade, particularly for manufacture commodity. Further inter-temporal analysis confirms this finding with increasing trend of intra-industry trade for non-manufactured commodity. Nonetheless, Indonesian sectoral performance was less competitive compare to other ASEAN countries. This study suggests that Indonesia may enhance the advantage of being AFTA’s member by, for example, creating a conducive investment environment.
CHARACTERISTICS OF ORGANIC AND NUTRIEN REMOVAL ON LOOP BIOFILTER SYSTEM FOR PEAT WATER AND WASTEWATER TREATMENT Elis Hastuti; Fitrijani Anggraini; Reni Nuraeni
Widyariset Vol 3, No 1 (2017): Widyariset
Publisher : Pusbindiklat - LIPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/widyariset.3.1.2017.55-66

Abstract

Domestic wastewater pollution in the watershed area which has ecologically sensitive area, such as peat water, can be resolved by water management that combines raw water treatment and wastewater treatment with closed loop system on a community scale. This paper describes the removal characteristics of organic and nutrient in biofilters loop system to treat raw water that contains color <300 units PtCo, COD 102-116 mg/L, and domestic wastewater. Water treatment system which consists of a biological treatment and multimedia filtration is used to supply drinking water and to conduct wastewater treatment on a community scale by using the potential of ecosystems and chemical-physical characteristics of peat. The study was conducted by applying method of field scale to serve 50 families and method of performance evaluation models based on approach of first-order kinetics plug flow and Kadlec and Knight k-C* model. The case study is located in downstream of Siak watershed areas, as one of the national strategic watersheds, which is packed with urban slum areas with low access to surface water utilization and good sanitation infrastructure. Water treatment unit that consists of peat biofilter systems, hybrid aerobic biofilter, and zeolite cation-anion filtrationcan support water supply in public sanitation facilities. The biofilters loop model for wastewater treatment consists of hybrid Upflow Anaerobic Sludge Blanket (UASB), biofilters, and constructed wetlands which its media is a combination between porous media and peat soils. At steady state, the removal of organic and nitrogen is larger than 90%.
ACETIC ACID FORMATION STUDY IN COCOA SWEATINGS TREATMENT UNDER ANAEROBIC CONDITION Mahensa Billqys Nurhayati Prativi
Widyariset Vol 16, No 3 (2013): Widyariset
Publisher : Pusbindiklat - LIPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/widyariset.16.3.2013.425-434

Abstract

This research aimed to study the possibility of cacao sweatings treatment to produce intermediate compound i.e. acetic acid in acidogenesis processes. It were carried on an anaerobic Circulating Bed Reactor which is made from flexyglass 6 L capacities and operated in batch system. The operation of two circulating bed reactor conducted at room temperature for 20 days and nitrogen gas flushing is performed at one of the reactor for 10 minutes in the beginning of operation. Gas composition analysis indicates the persistence of O2 in reactor A, hence the acetic acid formation follows the aerobic pathway and occurs more rapidly. Concentration of O2 in reactor B is relatively low compared to reactor A. So that is concluded that acetic acid formation reach the anaerobic pathway and run slowly. This research indicates that the presence of O2 in the reactor affect the pathway of acetic acid formation.
THE IMPACT OF IMPORT ON REGIONAL ECONOMIC GROWTH IN INDONESIA: A PROVINCIAL PANEL STUDY FROM 1995–2008 Dadang Ramdhan
Widyariset Vol 17, No 1 (2014): Widyariset
Publisher : Pusbindiklat - LIPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/widyariset.17.1.2014.25-34

Abstract

Kajian mengenai pengaruh impor terhadap pertumbuhan ekonomi daerah di Indonesia masih jarang, begitu juga dengan penggunaan provinsi sebagai objek penelitian. Kajian ini penting untuk dilakukan dan menarik karena dapat mencari hubungan dan kontribusi impor terhadap pertumbuhan ekonomi daerah di Indonesia. Adanya dua kemungkinan dampak dari impor terhadap pertumbuhan ekonomi daerah, yaitu dampak positif dan negatif, mendorong penulis untuk melakukan kajian ini. Kajian ini menggunakan panel data dengan pendekatan OLS, Random Effect, dan Fixed Effect. Hasil kajian menunjukkan bahwa impor memiliki dampak positif terhadap pertumbuhan ekonomi daerah di Indonesia dan secara statistik signifikan. Akan tetapi, impor berkontribusi negatif terhadap pertumbuhan ekonomi daerah setelah satu tahun impor datang ke Indonesia.
RELIABILITY EVALUATION OF COMPOSITE STANDARD BRIDGE USING VEHICULAR WEIGH-IN-MOTION MEASUREMENT DATA Widi Nugraha; Setyo Hardono
Widyariset Vol 1, No 1 (2015): Widyariset
Publisher : Pusbindiklat - LIPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/widyariset.1.1.2015.%p

Abstract

The Bina Marga standard bridge has been implemented as bridge designing references in Indonesia. One of the standard bridge types is a composite bridge. This composite bridge is designed based on RSNI T-02-2005, an Indonesian bridge loading standard. This standard is based on Load and Resistance Factored Design (LRFD) method. LRFD method is treating statistical data on loads and strengths as random variables that have to be evaluated periodically using reliability index as the indicator. The purpose of this research is to evaluate the reliability of a 25 m simple span composite bridge structure due to statistical load data from weigh-in-motion (WIM) vehicular loads measurement in Pantura highway of Cikampek-Pamanukan, West Java in 2011 and RSNI T-02-2005 nominal vehicular load. The results of this research are maximum bending moment due to RSNI T-02-2005 nominal vehicular load is 526.55 kNm with a probability of exceedance of 4.5 x 10-7 and the reliability index of this composite bridge is 7.16, which is larger than reliability target of AASHTO of 3.50.
CARBONDIOXIDE SINK ABILITY OF 15 PLANT SPECIES COLLECTION IN BOGOR BOTANICAL GARDEN Masfiro Lailati Lailati
Widyariset Vol 16, No 2 (2013): Widyariset
Publisher : Pusbindiklat - LIPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/widyariset.16.2.2013.277-286

Abstract

The increasing number of industries and motor vehicles has an impact in the increased concentration of carbondioxide in the atmospheree. This has been causing green house effects (global warming). Therefore, the availability is essential for absorbing carbondioxide in large capacity, both in forest areas as well as in large cities. The objective of this research is to measure carbondioxide sink ability of fifteen (15) species of local plants and to determine the effective in absorbing carbondioxide. Leaf of local plants collection samples were collected from the Bogor Botanical Garden. Carbohydrate analysis was done in the Laboratory Biokimia BB-BIOGEN Bogor, while stomata examination was done in Laboratory Kayu Solid IPB. The data obtained were analyized using carbohydrate mole comparation and linear regression. The highest sink ability was found for canary (12,638.453 g/hour) and the lowest was found for sandalwood (1.379 g/hour). Sink ability of the other species ranged between 131.244 g/hour and 11,461.506 g/hour.

Page 40 of 48 | Total Record : 476

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