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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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STRATEGIC ALLIANCES TO DEVELOP A COMPETITIVE ADVANTAGE ON SMALL MEDIUM ENTERPRISES (SMEs) IN INDONESIA Anang Hidayat
Widyariset Vol 16, No 1 (2013): Widyariset
Publisher : Pusbindiklat - LIPI

This study aims to analyze the influence of the variables to address issues that have been formulated. The research question in this study is how strategic alliances can build competitive advantage of small and medium Enterprises (SMEs) in Indonesia. This research provides the theoretical also managerial implications regarding steps to be taken by SMEs in Indonesia to improve competitive advantages through strategic alliances. The population in this study is the alliance of SMEs in Indonesia. From 100 distributed questionnaires, only 63 were returned. Respondent’s answers data were analyzed for it’s compliance with the model study of the theoretical framework by using a structural equation modelling (SEM). From the data analysis shows that strategic alliances have a significant positive impact on the competitive advantages of SMEs. Strategic alliances of SMEs will be able to encourage increased competitive advantages of SMEs if the main priority is emphasized on the interests of alliance cooperation, particularly the improving skills and application of technology. Meanwhile the development of developed strategic alliance model prioritised on improving transaction processing cost advantage as manifestation of the competitive advantages of SMEs in Indonesia.Keywords: Small and medium enterprises (SMEs), Strategic alliances, Competitive advantage.

STUDI RELASI HIDRODINAMIKA SUNGAI CIWALEN DAN AIR TANAH MELALUI PENDEKATAN MODEL (Studi Kasus pada Aliran Sungai Ciwalen Kecamatan Garut Kota) Asep Mulyono
Widyariset Vol 13, No 2 (2010): Widyariset
Publisher : Pusbindiklat - LIPI

Ciwalen River flows pass of leather industry in Sukaregang area that is the one of the prominent industry in Garut region. The usage of chemicals in the leather tanning process resulted in toxic liquid waste released to Ciwalen River. Ciwalen River containing contaminants would further contaminate the groundwater system along the Ciwalen River. The study of groundwater flow particularly hydrodynamic relation river and groundwater surrounding is required. Field and secondary data were utilized in this study. Groundwater flow and hydrodynamic relation river and groundwater analyses were carried out using Visual Modflow v3.1. software. The study results that hydrodynamic relationship between Ciwalen River and the groundwater system can be divided into 6 segments. Segment 1, 4, and 6 belong to effluent type, while segment 2 is of influent type. Segment 3 and 5 located right of the river are effluent and those located in the left of the river are of influent type. River channel length of segment 1 are 0.95 km, length of segment 2 are 0.62 km, length of segment 3 are 0.88 km, length of segment 4 are 0.21 km, length of segment 5 are 0.63 km and length of segment 6 are 1.18 km. Influent type indicate causes a groundwater pollution because river that’s containing contaminants would further contaminate the roundwater system particularly at urban wells in surrounding segment.

DRAG FORCE ANALYSIS OF EXTERNAL QUARK IN ROTATING AND STRONGLY INTERACTING QUARK GLUON PLASMA (QGP) USING STRING THEORY Ardian Nata Atmaja
Widyariset Vol 15, No 3 (2012): Widyariset
Publisher : Pusbindiklat - LIPI

In this paper, it is analyzed drag force of a quark in a rotating and strongly coupled Quark Gluon Plasma(QGP) by considering the motion of a string under background metric of rotating Banados-Teitelboim-Zanelli(BTZ) black hole. The non-trivial solution of string motion under rotating BTZ black hole depends on a constantmomentum conjugate which is fixed physically in all space. The drag force is characterized by the black hole’sparameters (curvature, mass and angular momentum) and angular velocity of the string. Moreover, it is also foundan external force term proportional to the angular momentum of the black hole in non-relativistic limit.

PRODUKSI BIODIESEL DARI BIOMASSA Chlamydomonas sp. ICBB 9113 DIKULTIVASI MENGGUNAKAN MEDIA YANG MURAH: EFEKTIFITAS DARI BEBERAPA METODE EKSTRAKSI Patmawati Patmawati; Bustami Ibrahim; Iriani Setyaningsih; Untung Sudadi
Widyariset Vol 17, No 2 (2014): Widyariset
Publisher : Pusbindiklat - LIPI

The main challenges to overcome in biodiesel production from microalgae are lower oil yield, as compared to those derived from plant and animal biomass, and expensive culture media. This work was aimed to compare the effectivity of three extraction methods differed in solvent used, e.g. n-hexane (N-hex), ethanol (Eth), and mixture of chloroform-methanol-water (CMW), to extract crude lipid and biodiesel from dry biomass of Chlamydomonas sp. ICBB 9113. This microalgae was cultivated in a cheap culture media using N and P soil fertilizers as nutrient sources. The results showed that, by using N-hex, Eth, and CMW methods, it could be extracted, respectively, 0.06%, 4.51%, and 20.45% crude lipid, and 384.2, 1333.8, and 2430.6 mg/100g biodiesel. The fatty acid profile of the studied microalgae biomass was: C8:0 (0.11%), C10:0 (0.09%), C14:0 (7.70%), 16:0 (1.39%), C18:0 (0.85%), C14:1 (5.12%), C16:1 (7.09%), C18:1 (8.28%), C18:2 (12.80%), and C18:3 (42.57%). Fatty acid characterization showed that Chlamydomonas sp. ICBB 9113 was dominated by C18: 3 and C16:0. Therefore, these microlagae were suitable to be used as raw material for biodiesel production to substitute the conventional fuel.

ANALISYS OF AIR POLLUTER SO2, NO2, AND HC BY USING LINE SOURCE MODELING APPROACH (CASE STUDY AT JALAN MAGELANG YOGYAKARTA) Ahmad Zaky Maulana
Widyariset Vol 15, No 3 (2012): Widyariset
Publisher : Pusbindiklat - LIPI

This research discuss the issue of air pollution caused by movable emission in Jalan Magelang, Yogyakarta.The objective of this research is to estimate the weight of emission resulted from motor vehicle pollution. Tocalculate polluter concentration, this research use line source modelling. The result shows that the bigger polluterconcentration is NO2 that reach 211,342 μg/m3 in the daytime. The bigger polluter contributer are pick up/trucktype vehicles. The heaviest polluter weight is NO2 that reach 299 ton/year.

ANALISIS KUALITAS PELAYANAN PT TASPEN (PERSERO) DILIHAT DARI PERSEPSI PESERTA Eko Andryanto Prakasa
Widyariset Vol 12, No 3 (2009): Widyariset
Publisher : Pusbindiklat - LIPI

This Study aims to measure factors which have dominant influences to service quality of PT TASPEN (Persero)'s members. Further more it is used as a recommendations for PT TASPENs managerial to give an effective and efficient services. The perceptions of PT TASPEN's member was defined by five service dimensions (Parasuraman, 2005) - Reliability, Responsiveness, Assurance, Empathy, and Tangibility. This study used confirmatory factor estimated by weight least square method as a tool and LISREL 8.50 as the software. The data collected by survey using questionnaire. Sample size for this research is 855 respondents. And the result from this research is all dimension can reflect service quality of PT TASPEN (Persero). Assurance and responsiveness dimension have dominant factor in service quality in PT TASPEN (Persero). The company should give more attention to tangibility dimension to improve service quality.

IN VITRO SHOOT PROLIFERATION OF STRAWBERRY USING STEM PLANTLET EXPLANT DERIVED FROM MERISTEM CULTURE Ahmad Syahrian Siregar
Widyariset Vol 16, No 3 (2013): Widyariset
Publisher : Pusbindiklat - LIPI

The fruit of strawberry contain phenolic compounds of vitamin C, B1, and B2 which is beneficial for health The successful of strawberry micropropagation depending on the ability of explants to produce large number of plantlets in short time. In order to increase the number of plantlets by organogenesis the use of plantlet stems as explants need to be optimized. The aim of this research was to investigate the potential of stem plantlet explants on the shoot proliferation of strawberry using 8 medium treatments. Research was conducted in the Plant Breeding Laboratory at Citrus Research Centre and Subtropical Fruit Indonesia, started from February to September 2011. The results showed that explant from stem of plantlet from meristem culture of strawberry could be used as initial material to proliferate strawberry plantlet. High number of plantlet (5.73) was produced on MS medium containing combination of plant growth regulator BAP and NAA at concentration of 0.5 mg/l and 0.025 mg/, respectively.

UPWELLING-DOWN WELLING DYNAMICS OF ARAFURA AND TIMOR SEAS Widodo S. Pranowo
Widyariset Vol 15, No 2 (2012): Widyariset
Publisher : Pusbindiklat - LIPI

Arafura and Timor Sea is territorial waters which surround three countries of Indonesia, Australia, and Timor Leste. Both seas have very strategic and transboundary conditions, such as for fisheries, sea-climate variability, marine pollutions and others. Therefore, we need studies to understand the characteristics of currents circulation. The most important physical parameters of these features is the dynamics of the upwelling and down welling. Hydrodynamics of 3-D modelling for currents circulation, using tides and wind as initial conditions, is employed to simulating scenarios of the Northwest monsoon, Southeast monsoon, and transition of both monsoons. The results are qualitatively verified. The dynamics of horizontally surface currents follows the monsoon system, and the vertical circulation is significantly exists. Upwelling in coastal waters south of the island of Timor, and between the Islands and the Tanimbar Aru islands appear in all the monsoon due to the influence of the bathymetry. The current circulation is potentially indirect contribution to the fisheries activities in the seas.

KORELASI PEMBANGUNAN INFRASTRUKTUR KE-PU-AN TERHADAP PENINGKATAN KONDISI SOSIAL EKONOMI MASYARAKAT PASCABENCANA DI PROVINSI NANGROE ACEH DARUSSALAM F.X. Hermawan Hermawan Kusumartono
Widyariset Vol 12, No 3 (2009): Widyariset
Publisher : Pusbindiklat - LIPI

This paper described the relation ofp ublic work infrastructures after disaster and the increasing ofp eople welfare in Nangro Aceh Darussalam (NAD) Province. This matter was based on the fact that there was not seen in advance, how much disaster influenced the condition ofp eople's economy. This condition was the main targets as receivers of the benefit. The increasing of people welfare was measured from education, income, job, and possession. This research used the combination of two methods, namely the qualitative and the quantitative methods (Mix Method). The qualitative method was used to answer social factor questions affecting the optimization of the public work infrastructures on the disaster area. The quantitative method was for observing and measuring people's economic condition level that changed then compared with disaster happened before. The research used six sample villages in the NAD Province. The observation found that the public work infrastructures were implemented in rehabilitation and reconstruction stage and it affected on the increasing of people's economy. There were some social problems in the process of planning and implementing stage. This condition caused less optimal public work infrastructures. Therefore, the study suggests that it needs some steps to anticipate against social problems, subsequently public work infrastructures could be well implemented and could increase people welfare.

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

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.

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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