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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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FEASIBILITY OF MOTORCYCLE LANE APPLICATION IN SUNSET ROAD BALI - Nicholas; Agah M. Mulyadi
Widyariset Vol 15, No 3 (2012): Widyariset
Publisher : Pusbindiklat - LIPI

Motorcycle population growth more than 12,1% a year in Bali involved in increasing number of motorcycleaccident. To minimized accident rate at road that had high percentage of motorcycle like Sunset Road and 4/2Dtype of geometric a motorcycle lane (MCL) can be applied. Feasibility of MCL Application must fulfil criteriaaccident rate, motorcycle proportion, operational speed, saturation degree (V/C) at peak-hour volume (PHV) andminimum road width. Data of traffic volume and motorcycle speed were collected for 8 hours and analyze withMCL criteria (Idris, 2008) and minimum width road. Sunset Road assumed had motorcycle accident rate 55,6%,motorcycle proportion (pcu) 42% or 500 pcu/hour, operational speed 62 km/hour, V/C= 0,45 and road width 6meters. Compared with the criteria, Sunset Road didn’t fulfilled motorcycle proportion criteria <1.200 pcu/hour,operational speed >44,17 km/hour, V/C <65 and road width <7,5 m, therefore MCL can’t be applied in SunsetRoad.

RESISTENSI PLASMA NUTFAH IRRDB 1981 TERHADAP PENYAKIT GUGUR DAUN Corynespora Alchemi Putri Juliantika Kusdiana; Fetrina Oktavia
Widyariset Vol 17, No 2 (2014): Widyariset
Publisher : Pusbindiklat - LIPI

Leaf fall disease caused by Corynespora casiicola can damage the rubber resulting in considerable economic losses. The opportunities to get rubber plant genetic resources that are resistant to leaf fall disease Corynespora casiicola have been made by testing the resistance of some germplasm IRRDB 1981. Testing the resistances of some germplasm is to produce genetic resources that are resistant to leaf fall diseases and used as parents in the crossing. Testing was done by using immersion leaves method in a solution of toxin C. casiicola. Resistance testing of 28 genotypes germplasm IRRDB 1981 showed various resistance responses. The results indicated that there were five genotypes that had moderate resistant which were PN 323, PN 333, PN 448, PN 494, and PN 593, and one genotype PN 235 showed highly resistant. The six genotypes needed to be tested in the field to determine their interaction with the environment and then used as cross parents to obtain resistant parentage to C. casiicola leaf fall disease.

AKTINOMISETES KHITINOLITIK DAN PROTEOLITIK SEBAGAI AGEN PENGENDALIAN HAYATI NEMATODA SISTA KUNING (Globodera rostochiensis) Agustinus Joko Nugroho
Widyariset Vol 13, No 2 (2010): Widyariset
Publisher : Pusbindiklat - LIPI

Golden cyst nematode (GCN/Globodera rostochiensis) is a new potato parasitic nematodes found in Indonesia in 2003 and caused great economic losses more than 70% of the production. Due to the problem caused by chemically control (resistancy, killed non target organisms, and environment pollution) development of alternative control measures is a great importance i.g. microbial control. The purpose of this research was to find chitinolytic and proteolytic actinomycetes for controling eggshell nematode which bears vitelin (protein) and chitin. The result found 21 actinomycetes isolates with ratio chitinolytic and proteolytic activities more than 3.0 and among of seven isolates were chitinolytic, 11 isolates were proteolytic and three isolates had double enzyme activities. Seven selected isolates were examined on their chitinase and protease specific activities and ability to degrade nematode eggs. The results showed three isolates had chitinase activity more than 200 IU/mg, four isolates had protease activity more than 300 IU/mg. Results of the bioassay test using crude enzyme on the GCN eggs found that three isolates were able to damage eggs more than 90%. The three isolates can be applied as an agent for biocontrol of GCN in the future.

SYNTHESIS OF POLYURETHANE MICROCAPSULE USING INTERFACIAL POLYMERIZATION AS SELF HEALING COATING MATERIAL Athanasia Amanda Septevani; Evi Triwulandari; Dewi Sondari
Widyariset Vol 15, No 2 (2012): Widyariset
Publisher : Pusbindiklat - LIPI

Polyurethane microcapsule had been made as self healing coating material. Polyurethane microcapsule synthesis had been conducted by interfacial polymerization both spontaneous polymerization and prepolymer polyurethane polymerization using glycerol as renewable palm oil polyol. Based on FTIR-Spectra showed the functional group of polyurethane formed both spontaneous and prepolymer polyurethane polymerization. Polyurethane microcapsule formed was in spherical form. The particle size prepared by spontaneous polimerization was smaller than particle prepared by prepolymer polymerization at range 20,51±12,7 and 139,2±72,3 μm respectively.

VARIABILITAS MUSIM HUJAN DI KABUPATEN INDRAMAYU Fierra Setyawan
Widyariset Vol 13, No 3 (2010): Widyariset
Publisher : Pusbindiklat - LIPI

Indramayu District is located in northern part of West Java. It has two seasons, dry season and rainy season. In this research, wet and dry rainy season in Indramayu District was investigated by using Standardized Precipitation Index (SPI). And also by using wavelet power spectrum analysis was investigated some factors that influence rainy season in this area. It is found that monsoon circulation is a dominant circulation that causing dry season (March – November) and rainy season (December–February). In extreme condition, El Niño – Southern Oscillation (ENSO) contributes to variability of rainy season. Index Southern Oscillation (SOI) influences variability of rainy season. If negative SOI occurred, mostly part Indramayu District has drier rainy season and the opposite, the rainy season will be wetter if positive SOI occurred. Another phenomenon that influences to the variability of rainy season is Indian Ocean Dipole (Dipole Mode Index, DMI). Negative DMI brings more precipitation. On the other hand, positive DMI influences to less precipitation.

THE INDONESIAN GOVERNMENT POLICIES IN THE KNOWLEDGE ECONOMY Diah Setiari Suhodo
Widyariset Vol 13, No 1 (2010): Widyariset
Publisher : Pusbindiklat - LIPI

Peranan ilmu pengetahuan dalam pembangunan ekonomi sebuah negara dewasa ini menjadi sangat pentingdan menjadi faktor utama dalam pembangunan ekonomi. Penggunaan ilmu pengetahuan dalam proses produksiakan meningkatkan kapasitas, efisiensi, dan efektivitas produksi. Lebih dari 50% pembentuk PDB di negara majuadalah kegiatan ekonomi yang berbasis produksi dan distribusi ilmu pengetahuan. Indonesia menyadari pentingnyailmu pengetahuan dalam pembangunan ekonominya dengan menetapkan visi dan misi “Terwujudnya MasyarakatTelematika Nusantara Berbasis Pengetahuan di Tahun 2020”. Tetapi, visi dan misi itu sendiri tidak cukup tanpadiikuti pelaksanaan dan komitmen yang kuat yang tercermin di dalam kebijakan pemerintah. Tulisan ini bermaksudmereview kebijakan pemerintah terkait dengan pemanfaatan ilmu pengetahuan untuk pembangunan ekonomi,utamanya dalam hal teknologi dan inovasi serta pendidikan dan pembagunan sumber daya manusia dengan menggunakananalisis kualitatif berdasarkan data sekunder. Pembangunan teknologi dan inovasi di Indonesia beradapada posisi yang terendah dibandingkan negara lain di Asia. Kebijakan yang telah dijalankan rezim pemerintahanterdahulu bisa dikatakan tidak berhasil karena terlalu berfokus pada pembangunan teknologi tinggi, padahal, tidaksepenuhnya benar bahwa semakin tinggi teknologi maka semakin tinggi pula dampak ekonomi yang dihasilkan,hal ini akan tergantung pada sektor apa teknologi tersebut diterapkan.

INVESTMENT POTENTIAL AND THE EFFECT OF FINANCIAL RATIOS STOCK RETURN IN MINING SECTOR IN ENVIRONMENT PRO STOCK INDEX AND SHARIA Heni Istianawati; Abdul Kohar Irwanto,; Mukhamad Najib
Widyariset Vol 18, No 1 (2015): Widyariset
Publisher : Pusbindiklat - LIPI

Investment is an investing activity on a company of aimed to obtain the return. One of the interesting investmentsfor investors is investing in the mining sector because of large amount of return obtained in a short time.Before choosing which stocks to be invested in the mining companies, investors need to look at the companyperformance to avoid the risk. The purposes of this study are to examine the investment potential and analyze theinfluence of financial ratios (CR, DER, EPS, ROE, TATO, ROA, PER, NPM) on stock returns in the mining sector.The object of this research is mining companies who are listed on index SRI-Kehati and Jakarta Islamic Index(JII) period 2010–2013 consistently. The method used was descriptive analysis to calculate Tobin‘s Q score tolook at potential investments. Panel data regression analysis was conducted to see the effect of financial ratios tostock return. The results show that PTBA and MEDC have high investment potential from 2010–2013. Becausethe company’s Tobin‘s Q score acquired above 1 for four consecutive years, while the explanatory variables havea positive and significant effect on stock returns is CR, EPS, ROA, and PER. PTBA is the highest average score ofCR, EPS, ROA, and PER compared to the other mining companies. Therefore, PTBA is the best choice of investmentfor investors, specifically in the mining sector.

DEVELOPING ORGANIZATIONAL ASPECTS OF POLDER INSTITUTION CASE STUDY: BANGER RIVER, SEMARANG Nanang Rianto
Widyariset Vol 15, No 1 (2012): Widyariset
Publisher : Pusbindiklat - LIPI

This qualitative research about composing the organizational aspect of polder board used case study method.Findings show that the suitable organizational form for Banger Polder System is a board that: 1) reflects theside who give direction; 2) reflects the responsibility to both internally (community) and externally (City Major);3) involve the internal and external stakeholders for operational and maintenance tasks; 4) the capacity andcomposition of the member organization (board direction) reflects the stakeholders support and interest related tooperational and maintenance tasks.

PENINJAUAN NIETODE PERHITUNGAN AWAL BULAN KAMARIAH KRITERIA MUHAMMADIYAH DENGAN KAJIAN ASTRONOMI Arief Sasongko Adhi
Widyariset Vol 12, No 1 (2009): Widyariset
Publisher : Pusbindiklat - LIPI

Muhammadiyah has long used a method which is based on the calculation of the conjunction of the Moon and the Sun to determine the beginning of Islamic months. If the conjunction happens before sunset and sunset happens before moonset, then the next day is the beginning of an Islamic month. Such a method often produces dates of the beginning of Islamic months which are earlier than the actual visibility of the lunar crescent. This research was conducted to compare the determination of the beginning ofIslamic months produced by different criteria. The criteria compared were Muhammadiyahs', Lapan's, SAAO's, and Odeh's. Astronomical data needed were obtained from Accurate Times 5.1 software for Cibinong area as the location of reference. Calculations were performed to determine the beginning of Islamic months starting from Sha'ban 1429 until Shawwal 1430. Comparison of the dates produced by the four criteria shows that those calculated by Muhammadiyah .'s criterion yielded in five differences out of 15 data points observed. It calls for a review on the criterion.

USE OF NEGATIVE SENTENCE IN LANGUAGE MONGONDOW, MONGONDOW DIALECT Sri Diharti
Widyariset Vol 16, No 1 (2013): Widyariset
Publisher : Pusbindiklat - LIPI

his research aims to describe about markers and use of negative sentence in language Mongondow, Mongondow dialect. The source of research data is oral data (primary) that writer get in the field research and obtained directly from informant as native speaker. This type of research is descriptive, that is explained in accordance with what is obtained. The data analysis techniques used is the ellipsis technique which is used to determine the role of negative markers, expansion technique is used to determine levels of the possibility of negative markers can be expanded or not, and permutation technique is used to locate or position may be assigned negative markers. The results of this research found a constituency that is used as negative markers in declarative negative sentence and interrogative language Mongondow, Mongondow dialect is jia’ ‘no’, jia’moibog ‘no way’, jia’dega ‘impossible’, and deeman ‘not’, then dika negative imperative sentence constituent is ‘don’t’.

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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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Kota adm. jakarta selatan,

Dki jakarta

INDONESIA