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Published by Pusbindiklat Peneliti LIPI

ISSN : - EISSN : 24610976 DOI : 10.14203

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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THE EFFECTS OF BACILLUS SUBTILIS CELLULASE ENZYME ON THE DECREASING OF CRUDE FIBER OF CASSAVA PEELS FOR FISH FOOD INGREDIENTS Irma Melati; MasTri Djoko Sunarno
Widyariset Vol 2, No 1 (2016): Widyariset
Publisher : Pusbindiklat - LIPI

The high content of crude fiber in cassava peel limits its digestion ability in fish. Cellulose enzyme from Bacillus subtilis is known to be able to degrade crude fiber. This study was aimed to obtain an effective dose of cellulase enzyme which was added to cassava peel to reduce its crude fiber content. The research was conducted in a completely randomized design with three treatments and two replications. The cellulase enzyme was extracted from Bacillus subtilis. Three different doses of the enzyme including control agent (0%, 25%, and 50%) were tested to degrade the crude fiber of cassava peels during two days of incubation period. Measured parameter is the fiber fraction of Neutral Detergent Fiber, Acid Detergent Fiber, lignin, cellulose, hemicellulose, reducing sugar, and soluble proteins. The data were analyzed using analysis of variance (F-test) and further with Duncan test to determine the mean difference between groups. The results of this study indicated that the most effective dose of cellulase enzyme to decrease the cassava peel crude fiber was 25%, in which the decrease of NDF, cellulose, and hemicellulose fractions were 16.27%, 18.04%, and 40.82% respectively, while reducing sugars and soluble protein contents increased into 57.50% and 38.94%, respectively.Our findings suggested that the addition of cellulose enzyme could improve cassava peels quality for fish food ingredients.

SPEAKER IDENTIFICATION USING HYBRID MODEL OF PROBABILISTIC NEURAL NETWORK AND FUZZY C-MEANS Vicky Zilvan; Agus Buono; Sri Nurdiati
Widyariset Vol 16, No 2 (2013): Widyariset
Publisher : Pusbindiklat - LIPI

A hybrid model of Probabilistic Neural Network and Fuzzy C-Means has been developed. The model has been applied using Mel Frequency Cepstrum Coefficients (MFCC) as feature extraction for identification. In addition to the natural voice, the effect of noise has also been taken into account. It has been shown that the model has good accuracy at 96% for voice without noise, 85.5% for voice with noise at the level of signal to noise ratio 30, and 60% for voice with noise at the level of signal to noise ratio 20. It has also been concluded that the clustering procedure using Fuzzy C-Means could improve the accuracy up to 96% for large number of training data.

PREVALENSI KOLIBASILOSIS PADA AYAM BROILER YANG DIINFEKSI Escherichia coli DENGAN PEMBERIAN BIOADITIF, PROBIOTIK, DAN ANTIBIOTIK Ade Erma Suryani; Mohammad Faiz Karimy; Lusty Istiqomah; Ahmad Sofyan; Hendra Herdian; Michael Haryadi Wibowo
Widyariset Vol 17, No 2 (2014): Widyariset
Publisher : Pusbindiklat - LIPI

The purpose of this research was to study the efficacy of bio-additive (a mixture of Lumbricus rubellus meal extract, Morinda citrifolia leaf extract and lactic acid bacteria ), probiotics, and antibiotics on the prevalence co- libacillosis and healthy status of broiler that infected by E. coli strain Avian Pathogenic Escherichia coli (APEC). A total of 140 DOC were distribute randomly into 20 units of cage, each filled with 7 chickens were arranged in a completely randomized desig . Twenty cages were divided into 5 group , each treatment consisted of 4 replicates. The treatment group consisted of treatment A = infection of E. coli positive control), B = infection of E. coli + bio- additiv , C = infection of E. coli + probiotic , D = infection of E. coli + antibiotic , E = no E. coli infection negative contro). Feed base on corn- soybean is formulated as a basal fee . The experiments were conducted for 35 days, on day 21 chickens infected E. coli. ND vaccination is given at the age of four days and 15 days. The observed parameters were changes of macroscopic, isolation and identification of E. coli, changes in histopathology, blood profiles and antibody titer against ND. Results showed the prevalence colibasillosis on treatment B resulted in the lowest rate (33.3), results in the isolation and identification of chicken with positive clinical symptoms kolibasilosis infected APEC, and microscopic observations showed histopathological changes in the organs pancreas, heart, liver, and exchanges fabrisius lung. The results of the blood profile analysis showed the presence of the body’s defense mechanism against bacterial infectio , which is evident from the number of leukocytes in treatment A and C are higher tha treatment E (P> 0.0 ), red cell count treatment D higher than E treatment (P> 0.0 ), and total of Hb treatment A higher than treatment E P> 0.0 ). Based on the overall health status, it can be concluded that the administration of bioaditif decrease the prevalence o colibasillosis 67.7 % .

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) Kautsarina Kautsarina
Widyariset Vol 14, No 3 (2011): Widyariset
Publisher : Pusbindiklat - LIPI

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.

THERMAL PERFORMANCE OF TRADITIONAL HOUSE UMA KBUBU Rini Nugrahaeni; I Ketut Suwantara
Widyariset Vol 15, No 3 (2012): Widyariset
Publisher : Pusbindiklat - LIPI

This study identified thermal performances of Uma Kbubu in Maslete village, which include the characterof thermal building and thermal comfort of occupants. Thermal values was measured by Hioki data Logger, Thermocoupletype T, Questemp 34, Anometer Kanomax, and closed questioner to get thermal responsed of occupants.Data was analysed by linear regression and comparation of building’s thermal characteristic between rainy anddry season. Study shows that Uma Kbubu has good thermal performance in rainy and dry season, and capableof creating thermal comfort for its occupants. Roof as building envelope has significant influence to thermalperformance of Uma Kbubu, while the wall had no significant effect. Neutral temperature was 24,6oC on rainyseason and 27,6 oC on dry season.

RANCANG BANGUN SISTEM OKSIDASI LAPISAN TIPIS SEMIKONDUKTOR OKSIDA LOGAM UNTUK SENSOR GAS CO Bambang Herlambang
Widyariset Vol 13, No 3 (2010): Widyariset
Publisher : Pusbindiklat - LIPI

In this research, manufacture of oxidation system for oxidation process of metal thin film has been done. This process is required to obtain metal oxide semiconductor which can be used as CO sensor. The system comprises furnace, temperature sensor, temperature controller, O2 gas tube, and flow meter. The system developed was then tested to know its performances by observing its temperature conditioning and controlling ability the furnace. The data processing results show that the value shown by the K thermocouple and digital temperature transducers can be stated with equation y = 0.9974x – 1.4339 where x is the value shown by type K thermocouple and y is the value shown by digital temperature transducers, while standard error is 2.24%. X-Ray analysis on Sn thin film samplesthat were oxidized for 12 and 24 hours at 400°C show that SnOx contents increase with increasing of oxidizing duration. Samples oxidized for 24 hours has little increasing of SnOx content than sample with oxidation for 12 hours due to oxidation saturation occurred on thin film surface.

ANALYSIS OF CITRUS COMPARATIF AND COMPETITIVE ADVANTAGE IN PRODUCTION CENTRE Apri Laila Sayekti; Lizia Zamzami
Widyariset Vol 14, No 1 (2011): Widyariset
Publisher : Pusbindiklat - LIPI

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.

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.

THERMOMECHANICAL TREATMENT PROCESS OF α/βTi-6Al-6Mo ALLOY AS NEW ALTERNATIVE MATERIALS FOR BIOMEDICAL APPLICATION Cahya Sutowo; Fendy Rokhmanto; Galih Senopati
Widyariset Vol 3, No 1 (2017): Widyariset
Publisher : Pusbindiklat - LIPI

Telah dilakukan proses pengecoran paduan Ti-6Al-6Mo menggunakan arc remelting furnace dan dilanjutkan dengan proses perlakuan termomekanik berupa homogenisasi dan pengerolan panas pada temperatur 900, 1000, dan 1100 °C. Pelat Ti-6Al-6Mo hasil pengerolan panas dikarakterisasi menggunakan mikroskop optik dan mikroskop elektron untuk mengidentifikasi struktur yang terbentuk, analisa pola difraksi sinar-x dilakukan untuk mengidentifikasi fasa yang terbentuk, dan uji keras dengan metode rockwell dilakukan untuk mengetahui harga kekerasan pelat Ti-6Al-6Mo. Struktur mikro hasil pengerolan berupa struktur titanium α dan tititanium β terdeformasi. Fasa titanium α dan titanium β juga teridentifikasi pada grafik pola difraksi sinar-x. Hasil pengujian kekerasan menunjukkan kekerasan tertinggi dicapai pada pengerolan pada temperatur 1100 °C.

EFFECT OF BIOFERTILIZER ON GROWTH AND NITROGEN UPTAKE OF SOYBEAN PLANTS (Glycine max. L.) VARIETIES MITANI AND ANJASMORO Taufiq Bachtiar; Setiyo Hadi Waluyo
Widyariset Vol 16, No 3 (2013): Widyariset
Publisher : Pusbindiklat - LIPI

Application for Rhizobium in local farmers has to be developed to support sustainable agriculture. This research was conducted to determine the influence of Rhizobium as a biofertilizer on growth and Nitrogen (N) uptake of two varieties of soybean. The experiment was carried out from January to May 2011 in South Jakarta. Randomized Block Design (RBD) was used in this experiment with six treatments and four replicates. The treatments were: K0=uninoculated with biofertilizer without urea, K100=uninoculated but with urea 100% equal 75 kg/ha, SS=inoculated with single strain biofertizer without urea, MS= inoculated with multi strain biofertilizer without urea, SS+50 =inoculated single strain biofertilizer with 50% urea, MS+50= inoculated multi strain biofertilizer with urea 50%. The results showed that application of MS +50 gave the best result on plant height, N uptake, nodule number and dry shoot of soybean plant varieties Mitani. Application of SS +50 gave the best results on plant height, N uptake, nodule number, and dry shoot of soybean plants varieties Anjasmoro.

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Contact Name
Andri Rahman

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andri.agus.rahman@lipi.go.id

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widyariset@mail.lipi.go.id

Editorial Address
Pusbindiklat LIPI, Jl. Raya Bogor Km. 46, Cibinong Science Center, Cibinong - Bogor 16911

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Kab. bogor,

Jawa barat

INDONESIA