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Widyariset

widyariset
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Published by Lembaga Ilmu Pengetahuan Indonesia

ISSN : 14117932 EISSN : 24610976 DOI : -

Core Subject : Engineering,

Engineering

Widyariset is a scientific journal which publishes the results of research and development, assessment and systematic thinking about science and technology. The writers of the scientific papers in this journal come from researchers/researcher candidates from various institutions' research and development (R&D), and universities. Widyariset is published regularly three times a year: in April for the issue of Social Sciences and Humanities (IPSK), in August for the issue of Natural Sciences (IPA) and in December for the issue of Engineering Sciences (IPT).

Arjuna Subject : -

Articles 485 Documents

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PENGGUNAAN EGM2008, EGM1996 DAN GPS-LEVELING UNTUK TINGGI UNDULASI GEOID DI SULAWESI Dadan Ramdani
Widyariset Vol 13, No 3 (2010): Widyariset
Publisher : Pusbindiklat - LIPI

GPS is used increasingly and commonly in the last past year in all aspect of live. But the height information in GPS is not the actual height. To convert it to actual height is needed geoid undulation. Geoid has three wavelengthsi.e. short, medium and long. From these three geoids, the long wavelength which is obtained from the global model is the important one to determinant the geoid. In 2008 Pavlis NK from NGA had established the global model (EGM2008) which has orde and degree of 2190. This global model was validated and is used to calculate the geoid undulation in Sulawesi. EGM2008 Validation was carried out with comparation between the geoid undulation of EGM2008 and EGM1996 with the geoid undulation from GPS-Leveling’s observation data. The result of this validation shows that EGM2008 in Sulawesi has better results compare with EGM1996. The standard deviation of EGM2008 is 0.88 cm better than EGM1996.

SIZE FRACTIONATION OF ZOOPLANKTON BIOMASS AND SPECIES COMPOSITION IN THE LAGOON OF PULAU PARI, SERIBU ISLANDS Reny Puspasari
Widyariset Vol 16, No 3 (2013): Widyariset
Publisher : Pusbindiklat - LIPI

Zooplankton is the main prey of fish larvae. The match between fish larvae and its prey depends on the size and the composition of zooplankton. The study aims to investigate the biomass and species composition of zooplankton and their relationship to the environmental conditions in Pulau Pari Lagoon. Research was conducted from June to November 2010. Results showed that 63,9% of zooplankton biomass consisted of microzooplankton, dominated by the class of Crustacea with subclass of Copepoda, and 36,1% of zooplankton biomass consisted of mesozooplankton, dominated by the class of Crustaceasu with subclass of Malacostraca. The biomass peak occurred at the end of July indicating the highest food availability and this could support fish larve survival.

DUPLICATION IN INDONESIAN JOURNAL ARTICLE: QUALITY ANALYSIS Ekawati Marlina; Retno Asihanti Setiorini; Kamariah Tambunan
Widyariset Vol 18, No 1 (2015): Widyariset
Publisher : Pusbindiklat - LIPI

There are several cases of duplicate articles in Indonesian scientific journal. This study provide inputs tothe journal publisher in Indonesia to prevent duplication. This paper conducted analysis of quality articles andjournals, data obtained from the Indonesian Scientific Journal Database (ISJD) and printed journals in PDIILIPI. The results show (1) the duplication are written by the same author, but published in different journals, in thesame or different year; (2) articles published in the same journal but in different volume; (3) articles from a similarresearch team, but published as sole author under the name of each member of the group. Most journals alreadyinclude a requirement that the article submitted has not been published in other journals. This paper suggests inorder to avoid duplication, each journal should add the prerequisite, such as authors should not submit the articleto other publishers before the selection process has been completed. In addition, to address duplication, whilethe selection is in process, publisher should conduct a benchmarking script analysis to search articles that havebeen published. ISJD, is a database for comparing articles and managed by PDII LIPI. Currently, ISJD alreadymanages more than 5,000 journals with more than 140,000 articles. This study is expected to provide input to thejournal publisher in Indonesia, so there is no duplication of publication of the article.

THE EFFECT OF KNOWLEDGE ABOUT ADOLESCENT REPRODUCTIVE HEALTH ON PRE MARITAL SEXUAL BEHAVIOUR IN INDONESIA Sri Lilestina Nasution
Widyariset Vol 15, No 1 (2012): Widyariset
Publisher : Pusbindiklat - LIPI

The objective of this study is to identify the effect of knowledge about adolescent reproductive health andsexual behaviour before marriage to marriage among adolescents in Indonesia. This study uses secondary datafrom the Youth Development Plan performance indicators survey conducted in 33 provinces in Indonesia. Thenumber of sample of this survey was 23,619 respondents conducted on adolescent women and men with an agelimit between 15–24 years. Units of samples used in the analysis of all unmarried women and men. This researchis an explanatory research which is multiple regression analysis. The use of multiple regression analysis is to testthe effect of independent variables on the dependent variable. The findings of this study demonstrate knowledgeof reproductive health influencing on sexual behaviour in adolescents in Indonesia. The findings of the studyindicate that the variable of reproductive health knowledge is a variable that affects significantly pre maritalsexual behaviour.

EFEKTIFITAS PEMASANGAN ABSORBER TERHADAP KALIBRASI MEDAN ELEKTROMAGNET OPEN STRIPLINE Priyo Wibowo
Widyariset Vol 12, No 1 (2009): Widyariset
Publisher : Pusbindiklat - LIPI

The effectiveness of 4cm x 4cm x 4cm pyramidal absorber lining arrangement on stripline field strength calibration has been studied in the EN 55020 laboratory at Testing Technology Division, P2SMTP-LIPI. The calibration procedure refers to CISPR 20 using Toyo IM5/A software at 84 frequencies from 0.15 -150 MHz. The number of calibrations is the representation of absorber combination number. This is needed to get the value of. RF voltage stripline average deviations depending on absorber number. The result of the data analysis shows that the maximum decreasing of average deviation voltage is 11.186%. However such installation still gives average deviation 0.689dB above deviation limit of ± 2dB.

SOME POPULATION PARAMETERS OF BALI SARDINE (Sardinella lemuru) IN BALI STRAIT WATERS Arief Wujdi
Widyariset Vol 16, No 2 (2013): Widyariset
Publisher : Pusbindiklat - LIPI

Purse seine was introduced at 1972 in Bali Strait and since then Bali sardine fish (Sardinella lemuru) are the most widely exploited by fishermen in these waters. One of the largest landing site of Bali Strait purse seiner is in Muncar, East Java. This study aims to estimate population parameters of Bali Strait oil sardine that were caught by purse seine in Muncar. Data were collected from August 2010 to December 2011, and were analyzed using FISAT II (version 1.1.3). The results showed growth parameters were L∞ = 20.75 cmFL; K=1.20 year-1 and t0=0.1456 year. The results of Z=6.39 year-1; M=1.78 year-1; F=4.61 year-1; and E=0.65. The exploitation rate in this study was greater than the optimum exploitation (Eopt), indicating an overfishing had occurred. The recruitment pattern of Bali sardine had two peaks a year, in February and July, where the recruitment in July was greater than February.

PERANCANGAN TANGKI BIOGAS PORTABEL SEBAGAI SARANA PRODUKSI ENERGI ALTERNATIF DI PEDESAAN M. C. Tri Atmodjo; Dadang Rosadi; Hardoyo Hardoyo
Widyariset Vol 17, No 3 (2014): Widyariset
Publisher : Pusbindiklat - LIPI

The increasing price of fossil-based energy and the higher amount of its consumption amidst its limited source would be the main reasons to develop some alternative energy from renewable sources. One of such alternative energy sources is the one from biomass waste, which is easy to find in rural areas as well as in animal husbandry. This biogas portable tank is designed for 160 liters of volume and 75% of this volume is filled with slurry which composes 1 part of cow manure and 1 part of fresh water. The Hydrolysis Retention Time of this slurry is about 20 days and everyday 14.5 liters of old slurry is replaced with the new one and will produce biogas by about 0.56 until 0.68 cubic meters per day, equal to 0.26 kg of LPG. By the assumption that the price of LPG is Rp6,000 per kg and 30 days of operation in a month, the biogas portable tank would get revenue which can cover cost production of the tank in less than 2 years of operation. With its simple design, small scale and lower cost production, and operability, the biogas portable tank is suitable for the production process of biogas and for fulfilling energy needs in rural areas.

DEVELOPMENT PROGRAM FOR CALCULATION OF MATERIAL DIFFUSION COEFFICIENT IN SURFACE ENGINEERING Jan Setiawan
Widyariset Vol 15, No 3 (2012): Widyariset
Publisher : Pusbindiklat - LIPI

A program to calculate the diffusion coefficient and predicting the depth, time and temperature of diffusionhas been developed. It is shown that the calculation result is in good agreement with the known conventionalone. The program has been developed using Visual Basic based on the Fick’s II law and the diffusion coefficientequation as an exponential function of temperature. It is argued that the program could improve the accuracy ofthe calculation of diffusion coefficient, depth, time and temperature which are important to improve the diffusionprocess efficiency.

URBANISASI DAN DAYA DUKUNG LINGKUNGAN DI KOTA TANGERANG Gusti Ayu Ketut Surtiari
Widyariset Vol 12, No 3 (2009): Widyariset
Publisher : Pusbindiklat - LIPI

The purpose of this article is to know the condition of the carrying capacity of Tangerang City. The background is that Tangerang City has rapidly increased in development and population growth according to its location as a Buffer zone ofD KI Jakarta and a central of industry. A Buffer zone is hoped to be able to counter the high population growth in Jakarta by creating a harmonious development between Jakarta and its surroundings. Tangerang City acts as housing for commuters to Jakarta and have to accommodate migrants who want to work in Tangerang City. The development of housing and its facilities increase the utilization of natural resources such as land and water. Otherwise, the natural resources have limitation of capacity. The over utilization will encourage the risk of land degradation that can threaten a sustainable urban development. For its purpose, this article used data from BPS publication and other related sources, and it was analyzed descriptively.

KELAYAKAN EKONOMI PADA PRARANCANGAN PABRIK FTALAT ANHIDRIDA KAPASITAS 45.000 TON/TAHUN Diah Anggraeni Jatraningrum; Sari Octavianingrum; Herry Santosa; Didi Dwi Anggoro
Widyariset Vol 13, No 1 (2010): Widyariset
Publisher : Pusbindiklat - LIPI

A pre-design of plant to produce 45.000 tons/year phthalic anhydride from 47,200 tons/year ortho-xylene uses Davy McKee process with vanadium pentaoxide catalyst in non isothermal - non adiabatic fixed bed multitubes reactor that operated at 2 atm and 340-360oC. Phthalic anhydride is intermediate chemical that raw material and product price depend on the global economical condition. From the design basis, the economical parameters analysis show that after tax, Profit on Sales (POS) is 7.78%, Return On Investment (ROI) is 34.76%, Pay Out Time (POT) is 2.23 years, Break Event Point (BEP) is 43.71%, Shut Down Point (SDP) is 28.16% and Discounted CashFlow Rate of Return (DCFRR) is 22.40%. All economical parameters requirements for plant design are complied. The range of optimum commercial plant capacity is 26,221 to 71,210 tons/year. Due to price fluctuation, plant can be run normally on range of increasing raw material price +6.79% and decreasing product price -6.92% from price basis and it is better than South East Asia market condition. It is concluded that the phthalic anhydride plant is feasible to be established in Indonesia.

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Pusbindiklat Peneliti-LIPI (The National Training and Education Center for Researchers Development – Indonesian Institutes of Sciences) Jl. Raya Bogor Km. 46, Cibinong Science Center Cibinong - Bogor 16911

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Contact Name
-

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Pusbindiklat Peneliti-LIPI (The National Training and Education Center for Researchers Development – Indonesian Institutes of Sciences) Jl. Raya Bogor Km. 46, Cibinong Science Center Cibinong - Bogor 16911

Location
Kota adm. jakarta selatan,

Dki jakarta

INDONESIA