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Jurnal Teknosains
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Core Subject : Engineering,
JOURNAL TEKNOSAINS, is a journal which began publication in 2011, and is published each June and December. JOURNAL TEKNOSAINS is a series of scientific publications in science and technology area from the perspective of a multi and interdisciplinary studies. JOURNAL TEKNOSAINS is an interdisciplinary forum for the publication of original peer-reviewed, contributed and invited articles to improve and enhance science and technology. The journal provides a stimulating and informative variety of papers geared toward theory and practice in the hope that common information shared among a broad coalition of individuals and groups involved in science and technology will facilitate future efforts. JOURNAL TEKNOSAINS published by the Graduate School of Gadjah Mada University. All articles will be subjected to double-blind peer review process following a review by the editors.
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Articles 218 Documents
KAJIAN METODE DETEKSI DEGRADASI HUTAN MENGGUNAKAN CITRA SATELIT LANDSAT DI HUTAN LAHAN KERING TAMAN NASIONAL HALIMUN SALAK Nugroho, Sigit; Jaya, I Nengah Surati; Saleh, M. Buce; Wijanarto, Antonius B
Jurnal Teknosains Vol. 1 No. 1 tahun 2011
Publisher : Sekolah Pascasarjana UGM

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Abstract

The study examined detection method of forest degradation using forest canopy density (FCD), maximum likelihood, fuzzy and belief dempster shafer classification method. Accuracy evaluation of classification and detection were based on overall accuracy which obtained from 51 ground sample plot. Canopy density, LAI, crown indicator, trees density and basal area (Lbds) were conducted   as field indicators. Accuracy of classification among forest density (trees/Ha) with four classification methods were FCD 61%, maximum likelihood 57%, fuzzy 51% and belief dempster shafer 49%. Based on temporal detection accuracy from 2003 until 2008, FCD had overall accuracy 68 %.  The result of research, FCD  is  the best method to detect of forest degradation.    
EFEK APLIKASI PADA HIDROKSIAPATIT TERHADAP PERLEKATAN SEL OSTEOBLAS Sunarintyas, Siti
Jurnal Teknosains Vol. 1 No. 1 tahun 2011
Publisher : Sekolah Pascasarjana UGM

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Abstract

Hydroxyapatite (HA) is often used as a human bone graft. Modification of HA surface is developed to increase osseointegration process which is influenced by cells attachment surrounded the tissue. Sericin has polar side groups which accelerate cells attachment. The aim of this research was to determine the effect of sericin application over HA surface on the attachment of osteoblast cells. The research used HA synthesized from gypsum (Kulon Progo, Yogyakarta). Sericin was extracted from silkworm cocoons of Bombyx mori. Sericin of 0.01, 0.05, 0.1% were applied over HA discs surface (10 mm in diameter, 3 mm thick). The discs were inserted into osteoblast cells culture of MC3T3E1 for attachment test. The data were analyzed by ANOVA and LSD. The result showed that the amount of osteoblast cells attached to HA (7.60±0.42) was significantly difference (p<0.05) with HA + sericin 0.01% (10.30±0.52), HA + sericin 0.5% (10.63±0.70), HA + sericin 0.1% (10.67±0.87). Variation of sericin concentrations applied over HA did not influence any significant difference on the amount of cells attachment (p>0.05). In conclusion, sericin application over HA surface increased the amount of osteoblast cells attachment. Concentrations of sericin application over HA (0.01, 0.05, 0.1%) did not influence osteoblast cells attachment.
THERMAL CHANGES OBSERVED AT DRILLING SITE DURING BONE DRILLING Model study in bovine rib Kusuma, Dedy
Jurnal Teknosains Vol. 1 No. 1 tahun 2011
Publisher : Sekolah Pascasarjana UGM

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Abstract

The use of bone drill in the process of odontectomy and preparation of dental implant may increase temperature around drilling hole. As thermal changes are the critical precursor to physiological bone healing, increased of temperature over threshold must be minimized. The aim of this model study was to compare the temperature changes that were generated during bone drilling with various speeds. Eighteen fresh bovine ribs were chosen due to the similarity of physical properties and dimension of human mandible. A constant drill load of 4.06N was applied throughout the drilling procedures via a drilling rig. Bovine ribs were drilled by using the same bur  geometry (twist drill, 120 point angle) at low speed (8.750 rpm, 21.875 rpm, 35.000 rpm). The  bone temperature changes generated by the drilling process were measured measured by K-type thermocouple. The speed of 8750 rpm produced a maximum temperature changes in both distance of 1 mm and 2 mm from drilling hole. Minimal temperature changes were recorded for the speed of 35.000 rpm. ANOVA test, showed the mean of thermal changes for each of speed at distance 1 and 2 mm from drilling hole. The clinical benefits of using speed below 35000 rpm need to be considered due to the potential risk of thermal damage.
KONSERVASI MATA AIR BERBASIS MASYARAKAT DI UNIT FISIOGRAFI PEGUNUNGAN BATURAGUNG, LEDOK WONOSARI DAN PERBUKITAN KARST GUNUNG SEWU, KABUPATEN GUNUNGKIDUL Sudarmadji, Sudarmadji; Suprayogi, Slamet; Widyastuti, M.; Harini, Rika
Jurnal Teknosains Vol. 1 No. 1 tahun 2011
Publisher : Sekolah Pascasarjana UGM

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Abstract

Spring is as one of the water resources potential that can not be ignored. Gunungkidul district has three physiographic units: Baturagung Hills, Wonosari Basin and Gunung Sewu Karst Hills. All of them affect the distribution of springs in the Gunungkidul Regency. On the other hand, physiography will affect the community adaptation to the environment. It will contribute to the springs conservation effort. The purposes of this research are:  1) to identify the characteristics of springs, 2) to analyze the community participation in conserving  the springs as basic information to develop spring conservation models. To identify the socio-economic characteristics and the springs characteristics in the research areas use a survey method. Unit sampling and analysis is done purposively based on three zones: Baturagung Hills, Wonosari Basin and Gunung Sewu Karst Hills. Socio-economic survey was done by sampling on the 90 respondents, divided into 3 zones through direct interviews using quetionare. Quantitative descriptive analysis was performed through statistical tests. The results show that the quality of spring water in all physiographic zones meet to the water quality standard, except those for colli bacteria. The discharge of karst springs in the hills of Gunung Sewu greater than the discharge of the two other zones. The springs distribution is more in Wonosari Basin and Karst Hills of Gunung Sewu than Baturagung Hills. The level of the community participation in springs conservation is mostly done in groups through user spring groups. Generally, socio-economic factors affect to the level of participation in prevention of springs damage.
PIPELINE PROGRAM CDM DI INDONESIA: SEBUAH PELUANG DAN TANTANGAN UNTUK INDUSTRI PERTAMBANGAN Adiansyah, Joni Safaat
Jurnal Teknosains Vol. 1 No. 1 tahun 2011
Publisher : Sekolah Pascasarjana UGM

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Abstract

Climate change is one of the world’s problems that must be dealt; the failure in tackling climate change will impact on increasing the earth temperature and endanger the archipelago countries including Indonesia. Clean Development Mechanism (CDM) is one of the Kyoto Protocol mechanisms designed to mitigate climate change. Indonesia is one of the countries that meets the requirement as the host of CDM program and has set up the target to reduce GHG emissions as much as 26 percent in year 2020. The industrial sector has opportunities to engage actively in reducing GHG emission including mining industry.  The objectives of this research are to find out the potency of mining company’s involvement in climate change mitigation efforts particularly through CDM. In addition, the research of method that is chosen is literature study including reviewing data relating to CDM and with qualitative approached. The result shows that mining industry has a potency to involve actively in CDM program, among others, through energy efficiency, fuel substitution, renewable energy, Coal Bed Methane and the handling of critical lands through afforestation and reforestation scheme. Furthermore, by using Business as Usual assumption, the linier  regression that is produced y=27.255.x + 12.711 therefore  It is estimated that about 15 Mt CO2-e (assuming 4 percent reduction) needs to be derived from the energy sector in 2020 that can be taken as an opportunity for the mining industry as well.
ANALISIS POTENSI ENERGI DI DESA WUKIRSARI KECAMATAN IMOGIRI KABUPATEN BANTUL PROPINSI DAERAH ISTIMEWA YOGYAKARTA Nur Giyatno, Dhanis Woro Fittrin Selo
Jurnal Teknosains Vol. 1 No. 1 tahun 2011
Publisher : Sekolah Pascasarjana UGM

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Abstract

Dengkeng, Kobango, Giriloyo, and Nogosari II are places in the Wukirsari village which experience water scarcity. Water supply system (WSS) is proposed to fulfill water for 1,088 persons. The WSS need energy for pumping amount 88.47 kWh per day. Based on Atmospheric Data Science’s datas, obtained that the average of wind velocity in Imogiri is 4.20 meters/second and 50.00 meters in height above the sea level. The standard of wind velocity to build wind power generation is must more than 3.00 meter/second so enable to design in another turbine height. By region coefficient (α) 0.30, is obtained turbine height alternative 18.17 - 50.00 meters in range. By varied wind velocity base on that range obtained wind velocity average amount 3.70 meters/second and 32.17 - 33.17 meters in height range. Based on WSS’s lifetime and wind specific mass, obtained power per wide unit 21.06 W/m2 and energy 0.02 kWh/m2 each day.
PENGARUH KONSENTRASI ASAM ASETAT DAN WAKTU EKSTRAKSI TERHADAP MUTU KOLAGEN KULIT NILA HITAMPENGARUH KONSENTRASI ASAM ASETAT DAN WAKTU EKSTRAKSI TERHADAP MUTU KOLAGEN KULIT NILA HITAM Sahubawa, Latif; Putra, A.B. Naro
Jurnal Teknosains Vol. 1 No. 1 tahun 2011
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Abstract

The objective of the research was studied the effect of  acetic acid concentration and extraction time on the collagen quality of black tilapia leather. Black tilapia leather processed into collagen  as an alternative to increasing value-added of fisheries industry waste. Collagen of black tilapia was extracted by the treatment of acetic acid molarity, each: 0.25 M, 0.50 M, and 0.75 M (A factor) and  extraction time of 16 and 48 hours (B factor). Based on the analysis of variance, is known that the interaction of those treatments (AB) didn’t significantly effect on the yield  (p>0.05). Collagen extraction of tilapia leather with 0.75 M of acetic acid at 16 hours, produces the greatest yield  (5.97%), with denaturation temperature is 35.75oC, and quantitative composition of glisine, alanine, and glutamic amino acids were: 5395.82 ppm (52.99%), 2979.15 ppm (22.08%), and 1684.42 ppm (7.45%). Based on the analysis of SDS-PAGE, is known that the collagen contained were α component and β component, so that collagen of tilapia leather has type I collagen.
MENUMBUHKAN NADI BARU Ana, Ika Dewi
Jurnal Teknosains Vol. 1 No. 1 tahun 2011
Publisher : Sekolah Pascasarjana UGM

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Abstract

Pada tahun 1997, dunia dikejutkan oleh suatu film dokumenter dalam program Tomorrow`s World serial BBC. Di dalam tayangan BBC menyiarkan tentang Vacanti Mouse, seekor tikus dengan daun telinga yang tumbuh di punggungnya. Sekalipun penelitian aslinya (seperti yang diakui oleh kelompok Cao dan Vacanti) yang berlangsung di laboratorium MIT (Massachussets Institute of Technology) tidak se-spektakuler seperti tayangan BBC, sejak saat itu istilah rekayasa jaringan (tissue engineering) menjadi istilah yang dikenal oleh jutaan masyarakat dunia. Harapan manusia akan adanya The Body Shop (yang setiap waktu dapat menyediakan organ tubuh pengganti) menuai titik terang.
SPECIES COMPOSITION OF AMPHIBIAN IN GUNUNGKELIR STREAM, JATIMULYO VILLAGE, KULON PROGO dan Trijoko, Tony Febri Qurniawan
Jurnal Teknosains Vol. 2 No. 1 tahun 2012
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Abstract

Gunungkelir stream is located in Jatimulyo village, western part of Daerah Istimewa Yogyakarta Province.The ecosystem that surrounds Gunungkelir stream looks natural and unpolluted, it is possible for good livingenvironment of amphibians. However, the database about diversity of Amphibians in Gunungkelir stream hasnot been revealed. This research was done to study species diversity, species richness, species composition anddistribution of amphibians in Gunungkelir stream as an effort to support the sustainability of amphibians livefrom extinction. The research was done on January-May 2009, at night. The VES (Visual Encounter Survey)method with line transects 250 m were used. A total 11 species of amphibians from 6 different amphibia familieswere identified. Phrynoidis aspera, Leptobrachium hasseltii and Hylarana chalconota are dominant species. Thehigest percentage of amphibians population was tadpole (38%), followed by male (35%), female (21%), and theleast were juvenile (6%). During the survey, different species of amphibians were observed with their own rangeof spatial distribution.
A SUSTAINABLE SUPPLY CHAIN MODEL OF RELATIONSHIP BETWEEN WOOD SUPPLIER AND FURNITURE INDUSTRY IN INDONESIA and Shalihuddin Djalal Tandjung, Muh. Hisjam Adi Djoko Guritno
Jurnal Teknosains Vol. 1 No. 2 tahun 2012
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Abstract

Wooden furniture industry is an important industry sector in Indonesia, because many people’s welfare relyon this industry sector and the industry has a big social and environmental impacts. Many wooden furnitureindustries in Indonesia, especially in Central Java Province face problems related to the sustainability. The relationbetween wood suppliers and furniture industry is studied in this paper. A sustainable supply chain management (s-SCM) model is proposed as an approach for solutions for the problems. The approach is chosen due to the characteristics of the problems that related to economic, social, and environmental problems. This aim of this paper is to determine how much supply teak wood must be provided by PP to satisfy furniture industry demand, how much production capacity that must be increased and how large forest area that must be planted in order to achieve environmental and social goals without sacrificing economical goals much. Goal programming (GP) is chosen for solving the problems, because the goals are to maximize the total benefit,minimize the total loss and anticipate the conflicts between goals. Numerical trial based on observation in teak wooden furniture industry in Central Java was used to illustrate our findings. Using pareto efficient principle, the model can satisfy all goals that need to be achieved. Numerical results can be used by decision makers in teak wood industry to analyze the trade-off among several set of alternative solutions.

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