Widyariset
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).
Articles
485 Documents
<![CDATA[INDUCTION OF TRIPLOID SANDALWOOD PLANT (Santalum album L.) THROUGH ENDOSPERM CULTURE IN VITRO ]]>
<![CDATA[Lazarus Agus]]>
<![CDATA[ Widyariset Vol 14, No 2 (2011): Widyariset ]]>
Publisher : <![CDATA[Pusbindiklat - LIPI ]]>
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DOI: 10.14203/widyariset.14.2.2011.393-398
<![CDATA[Sandalwood (Santalum album L.) is an over exploitation that causes the population decreases drastically. An experiment was carried out to get triploid plant by using young seed culture. Young seeds of sandalwood were peeled and grew on solid Murashige and Skoog (MS) media formulation with or without addition hormones of α-napthaleneacetic acid (NAA), 2,4 dichlorophenoxyacetic acid (2,4-D), 6-benzylaminopurine (BA) or kinetin.(K). The young seed did not form shoot, but its endosperm formed callus. The endosperm produced callus 26.67% on media with addition of BA 1 mg/l, but not on media without any addition of hormone. The best callus production was on media with addition of NAA 2 mg/l and BA 1 mg/l. The best somatic embryos formation was NAA 1 mg/l + BA 1 mg/l and shoot formation was 2,4-D 1 mg/l + K 1 mg/l treatments. The resulted shoots from endosperms are expected to be triploid plants.]]>
<![CDATA[GROWTH AND YIELD OF Eucalyptus grandis HILL EX MAIDEN AT AEK NAULI SIMALUNGUN NORTH SUMATRA ]]>
<![CDATA[Aswandi Aswandi]]>
<![CDATA[ Widyariset Vol 14, No 2 (2011): Widyariset ]]>
Publisher : <![CDATA[Pusbindiklat - LIPI ]]>
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DOI: 10.14203/widyariset.14.2.2011.313-322
<![CDATA[Sustainable forest management need an effective yield regulation. This is depend on precision of growth and yield prediction on determination of rotation, harvesting intensity, thinning regime and another silviculture option. The objective of the study was to develop growth and yield model and defi ned optimum cutting rotation for Eucalyptus grandis Hill ex Maiden timber estate at Aek Nauli Simalungun North Sumatra. Current growth estimation and yield prediction models were studied using data from 15 permanent sampling plots. Data from annual measurement were used to formulate the models which include stand diameter and height function, basal area and stand volume function. Site quality was calculated using site index equation SI = H*{(1+10.03*e)/(1+10.03*e. This equation was developed based on relationship dominant height with stand age. Site index in that region have varies from 18.99 to 35.26. According on interception of curva Current Annual Increment (CAI) and Mean Annual Increment (MAI) were defi ned optimum cutting rotation at 6 year. Volume yield at this end rotation is 165,24 m -0.59*1/83/hawith MAI (Mean Annual Increment) 27,54 m /ha/yr. Yield prediction model were developed by regression analysis. The optimum of equations of mean of diameter, height, basal area and stand volume showed as follow: a. Stand dbh model : ln D = 0.743 + 0.363 ln A + 0.142 lnS + 0.313 ln B; b. Stand mean height model: lnH = - 0.206 + 0.247 lnA + 0.100 lnB + 0.822 lnS; c. Volume yield model : ln V = - 1.96 + 0.526 ln A + 0.548ln B + 1.38 ln S. Where D : dbh (cm), H: mean height (h), V : stand volume (m33 ha), A : age (yr), B: basal area (m), and S : site index. 2-1-0.59A]]>
<![CDATA[ANALYSIS OF CITRUS COMPARATIF AND COMPETITIVE ADVANTAGE IN PRODUCTION CENTRE ]]>
<![CDATA[Apri Laila Sayekti]]>;
<![CDATA[Lizia Zamzami]]>
<![CDATA[ Widyariset Vol 14, No 1 (2011): Widyariset ]]>
Publisher : <![CDATA[Pusbindiklat - LIPI ]]>
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DOI: 10.14203/widyariset.14.1.2011.1-9
<![CDATA[These research objectives are to analyze: (1) cost structure of citrus farming system in central production, (2) Indonesia’s citrus competitiveness. Analysis uses the Policy Analysis Matrix (PAM). The analysis showed that citrusfarming in the district Jember and Sambas financially and economically have profitability and are quite promising.Citrus also has a comparative and competitive advantage and it needs effort to improve the competitiveness.]]>
<![CDATA[SUPPORTING REGULATIONS TO IMPLEMENT PERFORMANCE BASED CONTRACT ON ROADS MANAGEMENT ]]>
<![CDATA[Hendra Hendrawan]]>
<![CDATA[ Widyariset Vol 18, No 2 (2015): Widyariset ]]>
Publisher : <![CDATA[Pusbindiklat - LIPI ]]>
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DOI: 10.14203/widyariset.18.2.2015.237-248
<![CDATA[Qualified Road infrastructure is needed to support development acceleration. To improve the quality of road infrastructure reforms needs to be carried out in the field of road management from planning, construction, operation to maintenance. One form of the reform is implementing performance based contract. This paper aims to identify related regulations and criterias those are needed to implement performance based contract optimally. Those regulations were analyzed descriptively and then examined for compliancewiththe performance based contractcriterias. The scope of the regulation are Laws, Goverment Regulation, and Presidential Regulation that related to the implementation of performance based contract. The study showed there has been policy relating to the application of performance based contract. However, these regulations do not meet the criterias necessary for the implementation of performance based contract optimally.]]>
<![CDATA[MICROHABITATS OF Hylarana chalconota ALONG FAST FLOWING WATER STREAMS IN DEGRADED LAND IN GUNUNG SALAK FOOT HILL ]]>
<![CDATA[Hellen Kurniati]]>;
<![CDATA[Alex Sumadijaya]]>
<![CDATA[ Widyariset Vol 14, No 3 (2011): Widyariset ]]>
Publisher : <![CDATA[Pusbindiklat - LIPI ]]>
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DOI: 10.14203/widyariset.14.3.2011.515-524
<![CDATA[This research was conducted to determine the microhabitat selection in the frog species Hylarana chalco-nota in fl owing aquatic habitats situated in degraded land. Three survey sites (river, ditch, pine plantation) were selected in the Curug Nangka area on the slopes of Gunung Salak at an altitude between 630–740 m above sea level. Transect methodology was used to determine the microhabitat preference in H. chalconota. Two ways paired and one-way ANOVA were used to test the impact of environmental factors on the microhabitat preference of H. chalconota. A signifi cant effect of air humidity on the presence of individual frog in the river and pine plantations was observed, but other environmental factors (air temperature, water temperature, air humidity, moon phase) had no signifi cant effect on individual H. chalconota along the ditch irrigation. In selecting microhabitats, the frog prefers vegetation below the substrate. However, frogs did not select specifi c plant species;preference appears to be related to the nature of the leaf and petiole strength. In horizontal microhabitat selection, individual frog tend to choose a distance between 0-1 meters from the edge of a river or ditch, while in vertical microhabitat selection, individual H. chalconota tend to choose a distance between 0–1 m from the ground.]]>
<![CDATA[DIFFRENCE OF EMOTIONAL INTELLIGENCE AND AGGRESSIONBEHAVIOR BETWEEN CHILDREN WHO HAVE MIGRANT WORKER MOTHER AND CHILDREN WHO LIVE WITH THEIR MOTHER (STUDY IN PRIMARY SCHOOLS IN GABUS SUB REGENCY, PATI REGENCY, CENTRAL JAVA) ]]>
<![CDATA[Nurul Aeni]]>
<![CDATA[ Widyariset Vol 14, No 1 (2011): Widyariset ]]>
Publisher : <![CDATA[Pusbindiklat - LIPI ]]>
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DOI: 10.14203/widyariset.14.1.2011.231-239
<![CDATA[Mother has significant roles on child development. Absence of mother potentially causes children maladap tive behavior like aggression. The objectives of this research: (1) to compare emotional intelligence of children who have migrant worker mother with children who live with their mother; (2) to compare aggression behavior of children who have migrant worker mother with children who live with their mother; (3) to analyze determination of mother’s status to aggression behavior with emotional intelligence as intervening variable. This research uses quantitative method. It uses 80 first primary school students in Gabus Sub regency, Pati Regency who are obtained by class random. Quantitative data are obtained from two psychological scales. Scale of Student Aggression Behavior contains 14 items (α = 0,785) and Scale of emotional intelligence contains 23 item (α = 0,865). This research has three findings: (1) children who have migrant worker mother have lower emotional intelligence than children who live with their mother; (2) children who have migrant worker mother more are aggressive than children who live with their mother; (3) Mother’s status determines children’s aggression behavior with emotional intelligence as intervening variable.]]>
<![CDATA[THE ASSESSMENT OF THREE PROCESS AREAS IN MATURITY LEVEL 2 CMMI-DEV 1.2 FRAMEWORK ON SMALL INDEPENDENT SOFTWARE VENDOR IN INDONESIA (CASE STUDY: INOVASIA) ]]>
<![CDATA[Kautsarina Kautsarina]]>
<![CDATA[ Widyariset Vol 14, No 3 (2011): Widyariset ]]>
Publisher : <![CDATA[Pusbindiklat - LIPI ]]>
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DOI: 10.14203/widyariset.14.3.2011.665-674
<![CDATA[This research was conducted to get a snapshot of the utilization of the Capability Maturity Model Integration (CMMI) framework in a small ISV, with Inovasia as a case study, by assessing three process areas of level 2 as a fi rst step in achieving software development activities in a timely, meets the needs of users, and within the budget provided. Software process improvement implemented in CMMI for Development model version 1.2 by using Management Information System Interim Maturity Evaluation (MISIME) as a tool to diagnose the maturity level of an ISV. This study generated value of current maturity level of ISV and software process improvement recom-mendations that can be done by the ISV.]]>
<![CDATA[THE EFFECTIVENESS OF CHITOSAN TOXICITY TO CONTROL THERMITES (Coptotermes curvignathus HOLMGREN) AT RUBBER PLANT ]]>
<![CDATA[Zaida Fairuzah]]>;
<![CDATA[Aidi Daslin]]>
<![CDATA[ Widyariset Vol 14, No 2 (2011): Widyariset ]]>
Publisher : <![CDATA[Pusbindiklat - LIPI ]]>
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DOI: 10.14203/widyariset.14.2.2011.439-446
<![CDATA[Thermite (Coptotermes curvignathus) is the destructive pest at rubber plantation especially rubber planta-tion which is ex of old plantation or forest with inaccurate land clearing. Chitosan known can control thermites by disturbing protozoa’s rules in digestion systems of thermites that causing thermites can not get the food yielded by protozoa. Effectiveness of Chitosan was known by directly testing chitosan to thermites with the pre eliminary test to get the range of effective concentration and way of effective application with 8 treatments in 4 concentration levels ( 0.1, 1, 10, and 100%) which is each concentration combined with two way of application (spraying and baiting) with 4 replications. Based to the result of pre eliminary test, 1% chitosan concentration determined as concentration standard of main test which consists of concentration test (0.1, 0.5, 1, and 2%) with the spraying application with 4 replications with control and termicide as comparitors. The same concentrations and compari-tors were also tested with the baiting application with 4 replications. Then, the test also done by combinating spraying and baiting application with same concentrations (0.1, 0.5, 1, and 2%) and compared with control and termiticides that replicated 3 times. The percentage of thermites mortality was observed every two days until the 4th day after application. The result showed that the combination treatment between concentration and way of application of chitosan showed that the most effective concentration to kill the thermites is 2% baiting application with the mortality percentage of thermites reaches 54.78% at the 4th day after application]]>
<![CDATA[“MEN AND WOMEN DICTION” IN MODERN INDONESIA POETRY (SOCIOLINGUISTIC-GENDERISTIC STUDIES) ]]>
<![CDATA[Ganjal Harimansyah]]>
<![CDATA[ Widyariset Vol 14, No 1 (2011): Widyariset ]]>
Publisher : <![CDATA[Pusbindiklat - LIPI ]]>
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DOI: 10.14203/widyariset.14.1.2011.143-152
<![CDATA[This paper will describe the results of different studies of language choice between men and women in so phisticated Indonesia poems. This study uses sociolinguistics-genderistics paradigm which states that the gender differences in language choice is not only describing what is commonly accepted as a fact that is reflected in the text, but also what is behind the text. This study uses a qualitative approach method and the results of descriptive data in the form of text or writing literary genre of poetry. The data were obtained by using sampling techniques. This study deals only with the poems of Indonesia in the period 1990–2000’s with a comparison of the poems of Indonesia in the period 1970–1980’s. In this study, the language of poem considered as an aspect which forms and express a direct expression and attitude of speakers with their own nuances that cannot be separated from ideological issues and the application of linguistic variations in language reproductive men and women.]]>
<![CDATA[DETERMINATION OF OIL EXTRACTION RATE FROM Spirulina sp. AND Chlorella sp. BY USING CELL DISRUPTION TECHNIQUE ]]>
<![CDATA[Susiana Melanie]]>;
<![CDATA[Diini Fithriani]]>
<![CDATA[ Widyariset Vol 1, No 1 (2015): Widyariset ]]>
Publisher : <![CDATA[Pusbindiklat - LIPI ]]>
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DOI: 10.14203/widyariset.1.1.2015.%p
<![CDATA[Oil derived from microalga has a big potential to substitute fossil fuel so that the oil extraction method needs to be developed. This study aims to compare the method for cell disruption in oil extraction of Spirulina sp. and Chlorella sp. microalgae. Spirulina sp. and Chlorella sp. were cultivated each in a pond with maximum capacity of 600 liters at Biotechnology Laboratory of Research and Development Center for Marine and Fisheries Product Processing and Biotechnology. Spirulina sp. were harvested by filtered it using satin. Chlorella sp. was harvested using coagulant NaOH, so it was needed to be neutralized to pH 7 with citric acid addition. The cell wall of Spirulina sp. and Chlorella sp. then was ruptured using sonicator and microwave, while other sample without disruption as control. The suspension then was macerated with n-hexane solvent, to extract the oil content. Oil content of Spirulina sp. which has been collected from this experiment gave result control: microwave: sonicator as 1.17%, 1.28%, and 1.97% respectively. Meanwhile, oil content of Chlorella sp. gave result from control, microwave, and sonicator as 0.93%, 1.20%, and 1.69% respectively. It was concluded that sonicator is the best method in oil extraction of cultured microalgae.]]>
