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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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PERHITUNGAN TEMPERATUR KELUARAN DAN MASUKAN PENDINGIN PRIMER DAN SEKUNDER PB-BI DI INTERMEDIATE HEAT EXCHANGER Epung Saepul Bahrum
Widyariset Vol 12, No 1 (2009): Widyariset
Publisher : Pusbindiklat - LIPI

Analyze of intermediate heat exchanger in Pb-Bi cooled nuclear reactor for hydrogen production design have been done. Based on one dimensional convective and conduction heat transfer model, temperature distribution ofprimary and secondary Pb-Bi at IHX have been modeled. Heat transfer coefficients ofprimary and secondary Pb-Bi coolant are calculated by sub channel analysis method. Primary and secondary Pb-Bi coolant temperature distribution obtained by solving numerically first orders differential equation using Runge-Kutta- Gill method Incase primary coolant flow rate 7000 kg/s and IHX inlet temperature 552°C, outlet temperature and flow rate of Pb-Bi secondary coolant are 542°C and 2700 kg/s. The temperature secondary coolant 542°C corresponds to chemical reaction temperature of steam membrane reforming.

PERFORMANCE PROMISING LINES OF MAIZE ON DRY ACID SOIL IN DISTRICT OF TALAWI, SAWAHLUNTO Sumilah Sumilah; Atman Atman
Widyariset Vol 16, No 2 (2013): Widyariset
Publisher : Pusbindiklat - LIPI

Maize development is potential in West Sumatera. Maize is strategic commodity, because related to subsector development (feed) and other sector (food and feed industry). The aim of this research was to obtain maize promising lines capable to well adapt in dry acid soil, with pH <5. Research was conducted in farmer cultivation of district of Talawi, Sawahlunto, begin in September to December 2010 at dry acid soil (pH 4,57), using 12 promising lines from Balit Sereal Maros such as GH-1, GH-2, GH-3, GH-4, GH-5, GH-6, GH-7, GH-8, GH-9, GH-10, GH-11, GH-12, and one existing variety as control. The experimental design was a Randomized Completely Block Design (RCBD) with three replications. Land processed perfectly of the size map each 4x6 m. Distance plant 80x15 cm. The packages of fertilizers for maize are 300 kg urea+150 kg SP-36+50 kg KCl per hectare. The observation of the studies were plant growth yield component and yield. The result obtained two maize promising lines (GH-1 and GH-3) capable to produce dry pods yield approximately 4,5 tons/ha and 4,2 tons/ha at dry acid dry soil in Sawahlunto (pH<5).

EFIKASI INSEKTISIDA NABATI DALAM MENGENDALIKAN KUTU KEBUL, Bemisia tabaci GENN. (HOMOPTERA: ALEYRODIDAE) Kurnia Paramita Sari; Suharsono Suharsono
Widyariset Vol 17, No 2 (2014): Widyariset
Publisher : Pusbindiklat - LIPI

Yam bean, neem, and nicotiana are natural pesticides for insect. Whitefly Bemisia tabaci Genn. is a pest and could decrease in soybean yield up to 80%. The aim of this research was to study the effectiveness of natural pesticides in controlling white fly. The research was carried out in ILETRI screen house and arranged in a 3 x 3 factorial randomized design with four replicates. Fisrt factor was three natural pesticides of yam bean, neem, nicotiana while the second factor was the time of aplications (two week after planting (WAP)-harvested), (2 WAP- floweres), (floweres-harvested). Dosage of each yam bean, neem or nicotin was 50 ml/l. Natural pesticides were sprayed over leaves. Parameters of whitefly population and injury intensity were observed. The result showed that whitefly population was lower in neem aplication (113 whitefly/3 leave trifoliate) and increased in control (684 whitefly/3 leave trifoliate), yam bean aplication (182 whitefly/3 leave trifoliate ) and nicotiana aplication (163 whitefly/3 leave trifoliate ). There was not interaction the kind of natural pesticides with time of application. This study shown that the neem natural pasticide at 2 WAP until harvest is effective in controlling the whitefly.

DESIGN AND CONSTRUCTION OF LEAD ACID BATTERY LIFE CYCLE TESTER ACCORDING TO INDONESIAN NATIONAL STANDARD Susanto Sigit Rahardi
Widyariset Vol 15, No 2 (2012): Widyariset
Publisher : Pusbindiklat - LIPI

Lead acid battery life cycle tester has been designed and constructed at Electrical Laboratory in B4T. The system consists of voltage and current controller and digital system. The purpose of the system is to test life cyle of lead acid batteries to meet government regulation and laboratory requirements specified by Indonesian National Standard (SNI).

KESALAHAN PENERJEMAHAN KALIMAT NEGASI BAHASA INGGRIS: SEBUAH KAHAN SINTAKSIS DAN SEMANTIS Santy Yulianti
Widyariset Vol 12, No 3 (2009): Widyariset
Publisher : Pusbindiklat - LIPI

This study analyses the translation mistakes of negation sentences of Mary Higgins Clark's novel entitled "stiilwatch". The target novel is translated by Juni Sohardjo. The study is clasified into semantic and sintactic analysis using descriptive comparative method. Data were collected and classified into negation scope according to Quirk's theory and analyses the translation forms in the Indonesian novel. Most of sentences from the target language of this novel use free form of the translation that have changed the structure and meaning of the original novel.

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The Activity of residents in Belida River, are affecting water quality conditions, and the presence of organisms in it. One of the biota that has an important role in these waters is periphyton. The study aims to determine the abundance and diversity of periphyton in Belida river waters around District Muara Enim. A descriptive exploratory study was conducted from February to November 2011. The results recorded 36 genera of periphyton belong to three classes namely Bacillariophyceae, Chlorophyceae and Cyanophyceae. Diversity index (H â) ranged from 0.74 to 2.15. It is concluded that the diversity of periphyton in the waters of the River Belidawas low, with Ulotrik species, Nitzschia, and Synedra being the Dominant.

EVALUATION OF THE PHYSICO-CHEMICAL AND ORGANOLEPTIC PROPERTIES OF TEMPE DERIVED FROM VARIOUS OF SOYBEAN VARIETY Nikmatul Hidayah; Resa Setia Adiandri; Mary Astuti
Widyariset Vol 15, No 2 (2012): Widyariset
Publisher : Pusbindiklat - LIPI

Imported soybean as raw material for making tempe was preferred than local soybean due to better qualities in colour and uniform seed size. This study was carried out to evaluate the physical, chemical and organoleptic properties of tempe derived from both local and imported soybean. Five local soybean varieties and an imported soybean were examined in this research. This study consisted of two steps: (1) making of the tempe from various of soybean variety; (2) characterizing the tempe such as the physical properties (density, texture, pH, yield), chemical properties (water content, ash content, protein, fat, carbohydrate), and organoleptic properties (colour, smell, flavour, preference). The result showed that tempe derived from local soybean had a better quality than imported soybean tempe for its physical, chemical and organoleptic properties. Galunggung tempe had the highest yield and Anjasmara tempe had the highest protein content. Based on organoleptic properties, it shows that Bromo tempe had the highest preference value.

Karakterisasi Korosi Baja SS-430 pada lingkungan NaCL Heri Jodi
Widyariset Vol 13, No 3 (2010): Widyariset
Publisher : Pusbindiklat - LIPI

SS-430 is a ferrite type alloy that can be selected for the base material of sea-water duct-pipes in the water supply system of a power reactor, but in general the ferritic alloy is not as good as austenitic with respect to corrosion resistance. Then NaCl environment is used to examine corrosion rate of SS-430. The corrosion was observed in four concentrations of NaCl solution. The experiments were carried out using M-273 EG&G potentiostate test instrument with polarization methode. The microstructure of post-corrosion samples were analyzed with an EDS attached to SEM instrument to detect the presence of any viable corrosion byproducts. X-ray diffraction methode was also used to detect any possible emerging corrosion on samples surfaces. The results showed that SS-430 suffers very little corrosion in NaCl environment, and that this material turn out to have an outstanding resistance toward NaCl corrosion. The possible ensuing corrosion byproducts are chrome oxides and iron oxides.

ANALYSIS OF CLIMATE ANOMALY IMPACT OF LA-NINA 2010 ON EXPERIMENT FIELD SEMBAWA RESEARCH CENTER, SOUTH SUMATERA Jamin Saputra
Widyariset Vol 16, No 3 (2013): Widyariset
Publisher : Pusbindiklat - LIPI

La-Nina is an unusual climate changes that occurs in several years. The effect of climate anomaly on rubber plantation is very influential on rubber production. This research aims as analysis of La-Nina 2010 effects on experiment field Sembawa Research Centre. This research was carried out in experiment field Sembawa Research Centre at 2011. Research was conducted by analyzing the impact of rainfall in 2009 and 2010 on the availability of seed, reduction of tapping days, and rubber crop productivity. The results showed that the presence of La-Nina climate anomalies resulted in the availability of seed decreased by 50% for rootstock breeding. In addition, rubber production in the clones are susceptible to Colletotrichum leaf fall disease is reduced. Furthermore, tapping days were reduced 9 days because of the high intensity of rainfall. On the contrary, La-Nina caused a time delay of leaf fall sesion, so it did not give negative impact on productivity of Experiment Field Sembawa Research Centre. Attempts to reduce the impact of La-Nina climate anomalies have been done by planting specific location rubber clones, using rain guard technology, and giving extra fertilizer on the plants which are suffered by leaf fall disease.

ECONOMIC VALUE AND POTENTIAL FOR TOURISM DEVELOPMENT OF TWAL POMBO ISLAND, SALAHUTU, CENTRAL MALUKU, MALUKU Kesya Pattimukay
Widyariset Vol 18, No 1 (2015): Widyariset
Publisher : Pusbindiklat - LIPI

Small island region has the potential of natural resources and high environmental services and can serve as the basis for implementing the capital of Indonesia’s development in the future. This area provides a productive resource such as coral reef, seagrass, mangrove forests, fisheries, and conservation areas. TWAL Pombo Island is a nature conservation area used for tourism and outdoor recreation. Some of the factors that inhibit Pombo Island tourism development areas such as; the lack of local government partisanship the management of the island, defense and safety, lack of basic infrastructure, and environmental degradation. The development of tourism in the region needs to be done as foreign exchange earnings for the region given the island’s natural beauty, andthe location is very strategic because it is more easily reached from the city center. Based on those factors, this study aims to identification of Pombo Island tourism potential based on the preception of tourists, estimates of the economic value that can be generated from the tourist island of Pombo, policy formulation development potential as a tourist attraction in the region Pombo Island.

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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