Jurnal Teknosains
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Pola perkembangan morfologi fisik kota di cekungan bandung periode 2009 – 2018
No full textLand development will be occur from time to time, the developments phenomenon will have either positive or negative impact. The impact of this phenomenon will affect various aspects, such as socioeconomic, mobility, land quality, and more. So the study on land development is required to evaluate and anticipate the negative impact on some region. To do evaluating and anticipating unwanted impacts a study can be carried out to become the basis for regional development or regional planning. one of them is to examine the pattern of urban development that will be used as a reference for regional development planning that will occur in the future. This study aims to analyze the development of urban physical morphology in Bandung Basin period 2009 - 2018. The method in this research is quantitative descriptive in the form of data collecting, data processing, modelling, and mapping. The research method is quantitative and qualitative in the form of data collection, data processing, modeling and mapping. The method of applying quadrant and burgess models to find the value of built-up land density that can reflect information on the phenomenon of built-up area development seen from the built-up area density in each agreed zone with geometric and quadrant models. The results in this research shows that the morphological structure of developed land in Bandung Basin is concentric with the highest density of 0.3459 km² which is centered in Cimahi and Bandung, also development is elongated and along the road with the majority of the land development create a leapfrog pattern, so it can be concluded that urban morphology in Bandung Basin is concentric with the linear development which is leapfrog
Strut Linker Geometry Improving Mechanical Behaviorof Coronary Stent
No full textStent is one of the common solution that is offered to the patient with atherosclerosis. An ideal stent should have good mechanical and biological properties. This research aims to analyze how importance strut linker geometry affect mechanical behavior of stent especially on recoil percentage, foreshortening percentage and fatigue safety factor prediction using finite element analysis. The result showed that strut linker geometry would specify the mechanical behavio
Mapping of pga value using psa method in West Halmahera North Maluku
No full textThe 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
Analisis polarimetri alos 1 palsar untuk zonasi mineral alterasi hidrotermal di kabupaten Soppeng Sulawesi Selatan
No full textRadar technology in remote sensing can be used for a variety of mapping, such as geological mapping. Soppeng Regency, South Sulawesi has a complex geological condition characterized by structural and intrusion phenomena with old materials. The phenomenon is an indicator of hydrothermal alteration due to magma intrusion activity in the rock bedding. Radar imagery is able to identify hydrothermal alteration zones through physical approaches such as landforms, rock (lithology), and geological structures. The aim of this research to explore the ability of radar polarization to identify hydrothermal alteration parameters and distribution pattern in Soppeng Regency. The physical characteristics are obtained from visual interpretation of the ALOS-1 PALSAR multi-polarization imagery with terrain analysis approach. Sample data is needed for petrographic analysis to determine rock minerals content. Analysis of physical characteristics and petrographic analysis were used to determine the type and distribution of hydrothermal alteration zones. The result of this study are ALOS-1 PALSAR imagery can be used to produce information on landform, rocks (lithology), and geological structures with total accuracy 83,9%. The hydrothermal alteration zone in Soppeng Regency consists of argillic 221,662 km², advanced argillic 20,239 km², phyllic 94,790 km², potassic 46,678 km², propylitic 328,746 km², sub-propylitic 181,517 km², and skarn 75,635 km²
Analisis pengendalian mutu bahan baku utama susu kambing bubuk di bumi haijau Yogyakarta
No full textPengendalian 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).
Tinjauan geografis wilayah potensial ibukota negara Indonesia
No full textThe 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 divided 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
Pencucian material magnetik pasir besi lansilowo menggunakan larutan asam klorida
No full textIron sand was widely used in various fields such as in the manufacturing of magnets, cement, and steel. Iron sand has the main composition of iron oxide and several impurities of oxides. To remove these impurities, iron sand needs to be washed with acidic solution such as HCl solution. This study aims to minimize impurities in the magnetic material of Lansilowo iron sand. Iron sand was prepared using an external magnet to obtain magnetic material. The magnetic material was washed using distilled water and 0.5 M HCl solution. The drying process was carried out at 80oC for 24 hours. Magnetic material was crushed, weighed, and characterized. Material characterization was carried out using X-Ray Fluorescence (XRF), Fourier Transform Infrared (FT-IR) Spectrophotometer, and X-Ray Diffractometer (XRD). The Characterization results showed that washing of magnetic material using H2O-HCl 0.5 M was able to increase the percentage of Fe element composition in Lansilowo iron sand. The iron oxide contained in Lansilowo Iron Sand remains magnetite. The washing the iron sand magnetic material using 0.5 M HCl solution succeeded in removing impurities such as Mg, Pr, K, Cl, P, S, Co, Ce, and Sn as well as reducing the percentage of the Si and Al elements.The washing magnetic material using 0.5 M H2O-HCl produced higher XRD intensities than those washed with H2O. The washing magnetic material with 0.5 M H2O-HCl was result particle size of 37,70 ± 4,62 nm and crystallinity of 53.12%
EDITORIAL
No full textSekolah Pascasarjana Universitas Gadjah Mada (UGM) mempunyai minat serta program studi yang sangat beragam. Dengan dasar keilmuan dalam bidang teknologi, agronomi, lingkungan dan kesehatan, Sekolah Pascasarjana UGM menjadi tempat bagi pengembangan ilmu multi dan lintas disiplin. Pada April 2020 telah dibuka sebuah program studi baru, yaitu Teknik Biomedis. Sebuah program studi yang menyelesaikan permasalahan medis berdasarkan pada kajian ilmu engineering. Kehadiran program studi baru, dapat menjadi bukti bahwa Sekolah Pascasarjana terus mengembangkan diri untuk memenuhi kebutuhan keilmuan untuk menyelesaikan permasalahan di dalam kehidupan manusia. Walaupun kondisi pandemi covid-19 tengah melanda semua negara, tetapi ternyata tidak menyurutkan perhatian para peneliti untuk mempublikasikan hasil penelitiannya. Hal tersebut dibuktikan dengan banyaknya artikel masuk ke tim redaksi. Secara konsisten dan profesional tim redaksi telah memilih serta melakukan penyuntingan terhadap delapan artikel yang dipublikasi dengan sistem blind review dalam penerbitan ini. Adapun penyuntingan artikel telah melibatkan mereka yang ahli di dalam bidangnya, tidak hanya yang berasal dari dalam negeri saja, tetapi dari luar negeri juga. Tim redaksi terus berupaya untuk melakukan penyempurnaan untuk setiap penerbitan baru. Akan tetapi, mohon maaf apabila masih terdapat kekurangan dalam penerbitan ini. Terima kasih yang tidak terhingga kepada semua pihak yang telah meluangkan waktu serta tenaga dalam proses penerbitan ini. Selamat membaca, semoga bermanfaat bagi pengembangan ilmu pengetahuan serta wawasan akademik kita semua
PENGARUH RUTE SINTESIS TERHADAP KEEFEKTIFAN PENGIKATAN GUGUS PDETA PADA SINTESIS Fe3O4@SiO2@PDETA
No full textSynthesis of Fe3O4@SiO2 modified with propyldiethylenetriamine (Fe3O4@SiO2@PDETA) with variation of synthesis routes have been investigated. Research was begun with synthesis of Fe3O4 using dispersion agent of trisodium citrate at coprecipitation system through stirring using ultrasonic wave. Coating magnetite with propyldiethylenetriamine modified silica was carried out through sol-gel process with two different mixing sequences of raw materials (two synthesis routes) with main materials of Fe3O4 synthesized, N-[3-(Trimethoxysilyl)propyl]-diethylenetriamine (TMSPDETA) and Na2SiO3. The products were characterized by fourier transform infrared (FTIR) spectrophotometer and scanning electron microscope-energy dispersive X-ray (SEM-EDX). Results indicate that Fe3O4@SiO2@PDETA has been synthesized succesfully. Fe3O4@SiO2@PDETA synthesized through route 1 (magnetite mixed with a mixture TMSPDETA and Na2SiO3) contains more propyldiethylenetriamine group than that of through route 2 (magnetite mixed with Na2SiO3 solution, then mixed with TMSPDETA
Problematika Pengembangan Padi Organik di Sawangan Magelang serta Peluang Sertifikasi Internasional
No full textOrganic farming has been remarkably evolving in many areas of Indonesia for responding environmental issues and producing healthy foods. Organic rice is a type of organic farming product of a system which has been widely practiced including in Sawangan Village Magelang District as one of pioneering area on organic rice development in Central Java Province. This study is directed to analyze supporting factors, various problems faced on the development of organic rice and opportunity for getting international organic certification. A study has been done through household interview (30 farmers), indepth interview with key informants and Focus Group Discussion (FGD) at agricultural office of Magelang District. Data analysis used in this study are statistical descriptive and categorical qualitative. Results of the study show that: (1) performance of organic rice gradually getting better and productivity level has been getiing closer to conventional high external input rice farming, (2) supporting factorson improvement of organic rice include healthy rice production initiated through integrated pest management,transformative group leadership, supports from related stakeholders, high economic incentive, improvement of market networking, product certification, ICT application and favourable natural resource endowment, (3) Problems faced on the development of organic rice include variety of product quality among farmers, price variety and fluctuation, difficulty in organic seed access, mixing area of organic and anorganic rice farming, (4) Strategies for improving opportunity to get international organic sertification include innovation on product diversification, application of fresh product certification, modernization of machine for rice processing