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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 8 Documents
Search results for , issue "Vol 9, No 2 (2020): June (FORTHCOMING)" : 8 Documents clear
Tinjauan Geografis Wilayah Potensial Ibukota Negara Indonesia Sahamony, Anugerah A.
Jurnal Teknosains Vol 9, No 2 (2020): June (FORTHCOMING)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/teknosains.36756

Abstract

The number of actual problems in the existing capital of Indonesia raises the idea to move the national government center to another region. From all parts of Indonesia republic territory, which region is most potential to be the location of the nation’s capital relocation? the aim of this research is to identify the most potential area to be the location of the national government center development. The method used is this research is a quantitative analysis with ‘zooming’ concept. The analysis process is devided into three stages with nine assessment indicators. The stages are; (1) identifying the most ideal provinces using spatial centrality, external accessibility, and the vulnerability of macro-scale natural disaster variables, (2) identifying the most potential province using the potential of social condition, the potential of infrastructure development, and the potential of national economic integration variables, and (3) determining the most suitable zone to be the location of nation’s capital development, which is using variables of physiological and regulational suitability (land availability, water aviability, and the vulnerability of micro-scale disaster). The results of this research indicate that Paser Distict in Kalimantan Timur is the most potential region to be the future nation’s capital of Indonesia.
PENERAPAN METODE LIFE-CYCLE COST DALAM PERHITUNGAN EVALUASI EKONOMI JEMBATAN UNTUK PENENTUAN PRIORITAS PENANGANAN JEMBATAN Dananjoyo, Risang Aji; Aminullah, Akhmad; Budi Nugroho, Arief Setiawan
Jurnal Teknosains Vol 9, No 2 (2020): June (FORTHCOMING)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/teknosains.39052

Abstract

The economic evaluation of the Interurban Bridge Management System (IBMS) aims to determine the priority of bridge handling. One of the calculations required in NPV and IRR calculations used in priority handling is the cost of replacing the bridge. Over time, the IBMS system must be constantly updated to continue to use in accordance with current circumstances and use new, better methods. This study uses Life-Cycle Cost (LCC) method as an alternative method to calculate the replacement cost of 5 bridges in D.I. Yogyakarta in 2012. The IBMS method produces a priority sequence of bridge handling with Bogo bridge, Suru bridge, Winongo bridge, Kalasan B bridge and Duren bridge in sequence. The LCC method produces a priority sequence of bridge handling with Bogo bridge, Winongo bridge, Suru bridge, Kalasan B bridge and Duren bridge. A. The average initial cost of bridge replacement using both methods is 23.012%. The value earned using the Life-Cycle Cost method is always greater due to the addition of inspection fees, maintenance costs, and bridge damage costs.
PENGARUH CAMPURAN BAHAN BAKAR PERTALITE-BIOETANOL BIJI SORGHUM PADA MESIN BENSIN Sebayang, Abdi Hanra; Ibrahim, Husin; Dharma, Surya; Silitonga, Arridina Susan; Ginting, Berta Br; Damanik, Natalina
Jurnal Teknosains Vol 9, No 2 (2020): June (FORTHCOMING)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/teknosains.40502

Abstract

The depletion of fossil fuels, rising of earth temperatures and declining of air quality are an unavoidable phenomenon today. Bioethanol fuel is one solution to reduce this problem that comes from renewable raw materials. The purpose of this study is to investigate engine performance and exhaust emissions at gasoline engine by using the sorghum seeds bioethanol-pertalite blends with different mixed ratios (10%, 15%, and 20%). The test is performed on a four-stroke gasoline engine without modification. Engine speeds vary from 1000 to 4000 rpm, and properties of the sorghum seeds bioethanol-pertalite blends are measured and analyzed. In addition, engine torque, brake power, brake specific fuel consumption (BSFC) and brake thermal efficiency (BTE) as well as carbon monoxide (CO), hydrocarbon (HC), and nitrogen oxide (NOx) emissions are measured. The results show that BSFC decreased while BTE increased for a fuel blends containing 20% bioethanol at 3500 rpm engine speed, with each maximum value of 246.93 g/kWh and 36.28%. It is also found that CO and HC emissions are lower for the sorghum seeds bioethanol-pertalite blends. Based on the research results, it can be concluded that the sorghum seeds bioethanol-pertalite blends can improve engine performance and reduce exhaust gas emissions. Keywords: bioethanol; pertalite; performance engine; exhaust gas emission; alternatif fuel.
STOCHASTIC FRONTIER ANALYSIS ON TECHNICAL EFFICIENCY OF STRAWBERRY FARMING IN PURBALINGGA REGENCY, INDONESIA Wijayanti, Irene Kartika Eka
Jurnal Teknosains Vol 9, No 2 (2020): June (FORTHCOMING)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/teknosains.40944

Abstract

The objective of this study is to determine technical efficiency and factors affecting technical inefficiency of strawberry farming in Purbalingga Regency. This study was conducted in Karangreja Subdistrict, Purbalingga Regency, Central Java Province. Purposive sampling method was utilized to select 100 farmers as the respondents. All of whom have been running their farm business for at least three years consecutively from 2015 to 2017. Stochastic frontier production function was applied to measure technical efficiency and factors affecting technical inefficiency. The findings show that strawberry farming in Purbalingga Regency, Central Java Province, is technically efficient with efficiency number varies between 26.50-99.40% and the average efficiency number of 77.80%. Furthermore, the results indicate that the farmers’ formal education and the number of household members significantly affect the technical efficiency of strawberry farming.
MAPPING OF PEAK GROUND ACCELERATION (PGA) VALUE USING PROBABILISTIC SEISMIC HAZARD ANALYSIS (PSHA) METHOD IN HALMAHERA BARAT REGION, NORTH MALUKU Ningrum, Rohima Wahyu; Suryanto, Wiwit; Fauzi, Hendra; Mei, Estuning Tyas Wulan
Jurnal Teknosains Vol 9, No 2 (2020): June (FORTHCOMING)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/teknosains.41483

Abstract

The earthquake that occurred in the West Halmahera region was very detrimental, even though the human casualties were not very significant. But it will affect the stability and capacity of a region in terms of regional development. The mapping of earthquake-prone areas is carried out by a probabilistic seismic hazard analysis (PSHA) method to analyze soil movement parameters, namely Peak Ground Acceleration so that it can determine earthquake-prone areas in West Halmahera. The results of seismic hazard analysis show that the West Halmahera area is an area that is relatively prone to earthquake hazards because it is still strongly influenced by subduction (megathrust) earthquakes from the Philippine plate, Maluku sea and Sangihe. This is indicated by the value of earthquake acceleration on the Peak Ground Acceleration for the 500 year return period of around 0.38 - 3.69 g and 0.30 - 3.69 g for the 2500 year return period.
Aplikasi Peta Kendali P Sebagai Alat Pengendali Mutu Bahan Baku Susu Kambing Bubuk di Bumiku Hijau Agustina, Yohana
Jurnal Teknosains Vol 9, No 2 (2020): June (FORTHCOMING)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (144.877 KB) | DOI: 10.22146/teknosains.42139

Abstract

Pengendalian mutu suatu produk memegang peranan penting dalam memberikan kepuasan dan mempertahankan loyalitas pelanggan. Tujuan penelitian ini adalah untuk mengetahui proses pengendalian mutu bahan baku, dan mengidentifikasi faktor-faktor penyebab dominan dalam kegagalan mutu bahan baku susu kambing bubuk di Bumiku Hijau Yogyakarta. Penelitian menggunakan metode deskriptif. Data yang digunakan adalah jumlah kegagalan bahan baku selama Januari sampai dengan Mei 2018. Teknik analisis data menggunakan statistical quality control, yaitu peta kendali p (p-chart) dan diagram sebab-akibat untuk mengidentifikasi penyebab kegagalan produk. Hasil dari analisis peta kendali p (p-chart) diperoleh nilai LCL (0,00), CL (0,00), dan UCL (0,02), menunjukkan bahwa terdapat 6 titik yang melewati batas atas kendali statistik selama Januari sampai dengan Maret 2018. Total kegagalan bahan baku (reject) selama Januari sampai dengan Maret 2018 adalah 18 liter susu kambing murni. Jenis penyebab kegagalan bahan baku yang paling banyak adalah karena warna susu kambing keruh dan aromanya tidak segar. Hasil identifikasi faktor penyebab kegagalan bahan baku dominan dengan menggunakan diagram sebab akibat menunjukkan bahwa faktor-faktor penyebab kegagalan bahan baku antara lain adalah peternak (man), peralatan produksi (machine), dan lingkungan (environment). 
Derajat Keasaman (pH) Saliva Meningkat Setelah Berkumur Rebusan Daun Sirih Merah (Paper Crocatum) Konsentrasi 10% pada Lansia Penderita Diabetes Melitus Tipe 2 Tandelilin, Regina TC.; Sandy, Leny Pratiwi Arie; Hondro, Meydistin Juwita
Jurnal Teknosains Vol 9, No 2 (2020): June (FORTHCOMING)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/teknosains.43897

Abstract

Dental caries is the major dental and oral health problems in Indonesia and world wide. Alteration in the saliva acidity level (pH) in the oral environment plays an important role in dental caries. Red betel leaf (piper crocatum) is a herbal plant that commonly found in Indonesia. Red betel leaf contains alkaloid, flavonoid, tannin and essential oil which have antibackterial activities. Objectives : The aim of this study was to determine the acidity change (pH) of saliva in elderly people with diabetes mellitus type 2 after gargling of 10% boiled red betel leaves.Methods : the subjects of this study were 30 persons who divided randomly into two groups i.e treatment group and control group. Each group consisted of 15 persons. In the treatment group, the subjects gargled using 10% boiled red betel leaves, while in the control group the subject gargled using aquades. The saliva was collected on each time treated and followed by pH measuring. The data analysis was conducted by Independent t-test statistic (p≤0,05).Results : the results showed that there was an effect of increasing salivary acidity (pH) of saliva after gargling boiled of red betel leaf (Piper crocatum) in elderly people with diabetes mellitus type 2. Conclusion : The change of acidity level (pH) of saliva was increased significantly at 5th to 15th minute from 5.33 to 6.67 after gargling boiled red betel leaves concentration of 10%. The acidity level range stated above indicates a normal. Key words : pH of saliva, red betel leaves, elderly, diabetes mellitus type 2
PEMETAAN DAN FAKTOR RISIKO SOSIOEKONOMI DAN PERILAKU TERHADAP KEJADIAN PENYAKIT PERIODONTAL DI KECAMATAN PUNDONG KABUPATEN BANTUL Setiawan, Prayudha Benni; Hartono, Hartono; Tandelilin, Regina Titi Christinawati; Nur'aini, Bekti
Jurnal Teknosains Vol 9, No 2 (2020): June (FORTHCOMING)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/teknosains.44013

Abstract

Background: Periodontal disease is a pathological damage that affects the tooth supporting tissues. Its pathogenesis is largely influenced by systemic conditions. In addition, environmental, socioeconomic, behavioral, environmental and geographic factors can affect individuals experiencing periodontal disease. Geographic Information System (GIS) can be used to analyze the differences of these factors, especially those relating to geographical differences, demographic factors, social and etc. Pundong district has geographical and socio-economic variationMethod: The type of this study was observational analytic survey with cross sectional design. The subject of research is determined by Regristry Based Study approach where Pundong Community Health Center as the basic data source in this research. Independent variable is periodontal disease, while dependent variable is socioeconomic factor and health behavior. Overview of periodontal disease mapping using ArcGIS.Results: generalized periodontitis often occurs in Seloharjo. Seloharjo has the most poor people in Pundong Sub-district. The variables significantly associated with periodontal disease severity were economic status and brushing behavior (p-value <0.05).

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