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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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KNOWLEDGE CREATION PROCESS IN THE FIRST LEVEL OF RESEARCHER FUNCTIONAL TRAINING, 7 TH ROUND IN 2010 Purnama Alamsyah
Widyariset Vol 14, No 1 (2011): Widyariset
Publisher : Pusbindiklat - LIPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/widyariset.14.1.2011.201-210

Abstract

First Level of Researcher Functional Training is an attempt to improve knowledge mastery of researcher/researcher candidates. the of training program is expected to increase the researchers in the field of research in accordance with a growing need in the community. This study tried to explore the knowledge creation in the implementation of First Level of Researcher Functional Training at 7round in 2010 through analysis of Nonaka’s SECI model (Socialization, Externalization, Combination, Internalization). This study concludes with a discussion of the implementation of knowledge creation, and further development of knowledge creation in First Level ofResearcher Functional Training
THE IMPLEMENTATION OF SOLID WASTE REGULATION IN PD KEBERSIHAN OF BANDUNG CITY: KNOWLEDGE MANAGEMENT ANALYSIS Anih Sri Suryani
Widyariset Vol 15, No 1 (2012): Widyariset
Publisher : Pusbindiklat - LIPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/widyariset.15.1.2012.119–130

Abstract

Solid waste management is a problem should be concerned in Bandung City. The enactment of Law No. 18of 2008 on Solid Waste Management constitute as it’s the legal basis. Implementation of this law was analyzedin frameworks of knowledge management in PD Kebersihan of Bandung City. Result of the study indicated thatknowledge management related to solid waste management made by a kind of method equipment, which has acreation activity phase and high level process. Agents who worked to transfer the knowledge were an organizationusing explicit artefact. Whereas the focus activity was on artefact.
THE EFFECT OF SURFACE ROUGHNESS AND STIRRING SPEED ON THE COATING CHARACTERISTICS OF MARTENSITIC ELECTROLESS Ni-P Rafi Dwi R; Arini Nikitasari; Sunardi Sunardi; Efendi Mabruri
Widyariset Vol 4, No 1 (2018): Widyariset
Publisher : Pusbindiklat - LIPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/widyariset.4.1.2018.21-28

Abstract

Coating process of martensitic stainless steel 420 (SS 420) as the base material component of the steam turbine blade component uses an Electroless Ni-P coating process. This process is one of the solution coatingsthat applied to stainless steel as a substrate to improve corrosion resistance.The goal of this research is to get an idea and information about the effect of surface roughness and stirring speed on the characteristics of Electroless Ni-P layer. Experimental parameters in this research were variations of 0.044 μm, 0.056 μm, 0.101 μm, and 0.164 μm surface roughness and variations of 4.9 rpm, 11.3 rpm, and 21.3 rpm stirring speed. Results showed that the surface roughness and low stiring speed causes the grain distribution becomes more uniform, whichis shown by Scanning Electron Microscopy (SEM) examination. Adhesion layer also increases along with increasing levels of surface roughness. The highest value of adhesion was 1.9 MPa at 0.164 μm and the lowest value of adhesion was 0.8 MPa at 0,044 μm.
PERAN BAMBU BETUNG (Dendrocalamus asper) PADA KUALITAS PENGELOLAAN LAHAN Rudi Hilmanto
Widyariset Vol 13, No 2 (2010): Widyariset
Publisher : Pusbindiklat - LIPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/widyariset.13.2.2010.23-28

Abstract

Bamboo has contributed to economic potency and the increase of ecology, so bamboo is widely used by local and non-local community. Objectives of this research is to verify role of bamboo betung (Dendrocalamus Asper)at land quality using method Ring rudihilmanto, but in this research it is focussed only at land element influenced by bamboo betung especially at acidity (pH) and porosity. Method of Ring rudihilmanto constitute method of tree interaction and adaptation. This method depicts environmental elements which can be influenced by population a tree species of phase its growth and development at ecosystem, that is: land, temperature, water, and the other organism. Result obtained by that role of bamboo of betung at ecosystem use method of Ring rudihilmanto had ability 14,29% improve alkalis soil and 12,55% to improve soil porosity. Role of bamboo betung (Dendrocalamus Asper) at land quality repair was different significant at 0,01 level.
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

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/widyariset.18.1.2015.25-36

Abstract

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.
PHOSPHATE AND NITRATE DISTRIBUTION IN INNER AMBON BAY DURING NORTHWEST AND SOUTHEAST MONSOON Idha Yulia Ikhsani; Malik Sudin Abdul; Johanis Dominggus Lekalette
Widyariset Vol 2, No 2 (2016): Widyariset
Publisher : Pusbindiklat - LIPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/widyariset.2.2.2016.86-95

Abstract

This study has compared the distribution of nutrients phosphate and nitrate concentrations in the inner Ambon Bay during two different seasons: Northwest and Southeast monsoon. The result showed that the nutrient concentrations in the Southeast monsoon were higher than those in the Northwest monsoon, both for phosphate and nitrate. The ranges of phosphate concentrations on the surface and near the bottom of the bay during the Northwest monsoon were 0.0471-0.0549 mg/L and 0.0549–0.1176 mg/L, while the ranges of nitrate concentrations were from undetected to 0.0976 mg/L on the surface, and 0.0956–0.5870 mg/L near the bottom of the bay. Meanwhile, the phosphate and nitrate concentration on the surface during the Southeast monsoon were 0.0495–0.0676 mg/L and 0.0247–0.4019 mg/L, while near the bottom the concentrations were 0.0495–0.1802 mg/L and 0.0247– 0.7944 mg/L. These results indicated that phosphate and nitrate concentrations in the inner Ambon Bay have exceeded the marine water standard quality, which can be categorized as polluted. High concentrations of phosphate and nitrate during Northwest monsoon could be caused by run-off from the mainland area that enters the bay trough the river. On the other hand, the enrichment of nutrients in the inner Ambon Bay during the Southeast monsoon could be dominated by the “nutrient-rich water mass” from Banda Sea that enters the inner Ambon Bay.
MENGGAGAS CONSTITUTIONAL COMPLAINT DI INDONESIA Qurrata Ayuni
Widyariset Vol 13, No 1 (2010): Widyariset
Publisher : Pusbindiklat - LIPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/widyariset.13.1.2010.91-100

Abstract

In essence, constitution is the contract between state and its citizen. It’s declare the rights and duty amongthem. As the highest norm, constitution must be applied as it is written. To make sure that all of public decision orother positive law are always vis a vis to the constitution, it is need to put one of the authority to ConstitutionalCourt in Indonesia named constitutional complaint. Using qualitative and literature study methode this research istrying to compare the practical and theoreitical of the constitutional complaint in some counties and its possibilityto applied in Indonesia. As results, constitutional complaint is indeed can be strengthening the rights of citizen inIndonesia and also prospective to be a member of Constitutional Court authorities.
ALTERNATIF KAROTENOID SINTETIS (ASTAXANTIN) UNTUK MENINGKATKAN KUALITAS WARNA IKAN KOKI (Carassius auratus) Sukarman Sukarman; Rina Hirnawati
Widyariset Vol 17, No 3 (2014): Widyariset
Publisher : Pusbindiklat - LIPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/widyariset.17.3.2014.333-342

Abstract

Any deficiency of carotenoid in goldfish’ feeds can fade the color of the fish (Carassius auratus), especially in aquarium condition. The aim of this study was to explore other sources of carotenoid which is to replace the synthetic carotenoid already used. The fish were fed with different types of feed i.e. those without carotenoid source (A), those with synthetic astaxanthin (synthetic carotenoid) (B), Haematococcus pluvialis meal (C), and marigold petal meal (D). Lightness (L), chroma (C), hue (H), and the content of total carotenoids in the skin of fish were analyzed. The result showed that lightness was not significantly different among treatments. The best value of chroma was 35.59% (D), significantly different from those with other treatments and followed by 25.25% (B), 20.36% (C), and 19.98% (A). The highest content of total carotenoid in the skin was derived from B (59.55mg/kg), followed by D (24.79mg/kg), C (6.84mg/kg), and A (5.37mg/kg). This study suggests that marigold petal can be used as an alternative natural carotenoid source replacing synthetic carotenoid.
OPTIMIZING OF COMPOSITE BOARD PRODUCTION MADE FROM WOOD WASTE AND BAMBOO Sukma Surya Kusuma; Bambang Subiyanto; Muh Yusram Massijaya
Widyariset Vol 14, No 2 (2011): Widyariset
Publisher : Pusbindiklat - LIPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/widyariset.14.2.2011.415-422

Abstract

The objective of this research was to develop composite board made of bamboo veneer, rubber wood veneer, and log core waste of rubber wood with determining optimum log core strip constructions and type of veneers. The bamboo veneer made from slices of Betung (Dendrocalamus asper), Andong (Gigantochloa verticilata), and Tali (Gigantochloa apus) bamboo species. Strip forms of log core were square and silindric forms. Arrangement of log core strip was zigzag in design. Composite boards were constructed from seven layers. Water Based Polymer Isocyanate was used as adhesive in composite board productions. The research results showed that the composite board made of Andong bamboo veneer, and square strip of log core performed best quality compared to other composite boards. The above type of composite boards fulfi lled Japanese Agricultural Standard (JAS) No. 1516, 2003 for structural plywood. These composite board was suitable for structural purposes.
UTILIZATION OF BIO, ORGANIC AND INORGANIC FERTILIZER FOR INCREASING FERTILIZER EFFICIENCY AND PRODUCTIVITY OF RICE ON THREE CULTIVICATION SYSTEMS OF LOWLAND RICE - Surono; Edi Santosa; Erny Yuniarti
Widyariset Vol 15, No 2 (2012): Widyariset
Publisher : Pusbindiklat - LIPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/widyariset.15.2.2012.301–312

Abstract

Some rice cultivation systems with integrated nutrient and environmental friendly management have been developed i.e. System of Rice Intensification (SRI) and Integrated Plant Management (IPM). Utilization of bio, organic, and inorganic fertilizer which give more advantages for productivity of lowland need be assessed on various agricultural lands with various rice cultivation systems. Utilization of bio-fertilizer accompanied by addition of compost 2.5 t/ha and inorganic fertilizer ½ (NPK)-recommendation are better to rice growth and yield than addition of compost 5 ton/ha on PTT system and fertilization with NPK-recommendation on farmer customs system. Effect of utilization of bio-fertilizer accompanied by addition of compost 2.5 t/ha and inorganic fertilizer ½ (NPK)-recommendation on farmer customs system, is better in the biological soil characteristics compared to the utilization of compost 5 t/ha or NPK fertilizer recommendation.

Page 38 of 48 | Total Record : 476

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