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Simetris
Published by Sekolah Tinggi Teknologi Ronggolawe Cepu
ISSN : 16937066     EISSN : 2686312X     DOI : https://doi.org/10.51901/simetris.v14i2.124
Core Subject : Engineering,
Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Electrical & Electronics Engineering Industrial & Manufacturing Engineering Mechanical Engineering
SIMETRIS: The Journal of Technology and Applied Science is a scientific journal published regularly every six months, namely June and December. SIMETRIS: Journal of Technology and Science Accepts articles from various groups covering the study and application of theory, research results, interesting conceptual ideas in the fields of engineering and applied science. The editorial team will decide on the selection of articles to be published after receiving the results from the expert editing team. Authors will be given input from the expert editing team. SIMETRIS: Journal of Technology and Applied Science contains research articles or literature studies in Indonesian and English.
Arjuna Subject : Teknik (semua kategori) - Teknik (Lain-Lain)
Articles 148 Documents
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OPTIMALISASI PEMANFAATAN AIR BAWAH TANAH UNTUK PENINGKATAN PRODUKTIVITAS PANGAN DI KECAMATAN KEDUNGTUBAN BLORA Hariyanto Hariyanto; Subandi Subandi
SIMETRIS No 18 (2014): SIMETRIS
Publisher : Sekolah Tinggi Teknologi Ronggolawe Cepu

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Abstract

Availability of water for irrigation in Sub Kedungtuban Blora very limited, in order to meet the water requirements for crops, the use of groundwater for irrigation is needed by farmers by providing capacity resources (people, equipment, materials) available, the necessary ability in utilization of water land for optimal irrigation. The main objective to be achieved is to know the amount of underground water point for irrigation water flow on irrigation and crop kebutuan especially corn, soybean and rice farmer in the district obtained Kedungtuban District. Blora and as a reference for the optimization and development of the wider utilization of underground water.Method used is descriptive method, a method that is designed to collect a variety of information about the circumstances that are going on, the way to determine the point of field surve underground water used, water flow, water demand fields, crop yields for farmers 17 villages . Sampling was done every village allotment quota sampling 5 total sample of 85 farmers deemed capable of representing the farmers.Crop farmers in the district of 17 villages taken Kedungtuban 5 representatives of farmers showed that the rice and maize yields in the last 5 years ie acquisition in 2009 (5.6 tons), in 2010 (5.6 tons), in 2011 (5, 6 tons), in 2012 (5.6 tons), in 2013 (5.6 tons) 5 area farmers average (1.04 ha) of the results of the maximum Keith prodoktivitas crops. Farmers who use groundwater number 57 farmers (67.06%) in eleven villages include Bajo, Gondel, Jimbung, Kemantren, Klagen, Pulo, Sidorejo, Cape, Wado, Panolan and Sogo. Rainfed area 22 farmers (25.88%) in five villages include Kalen village, Galuk, Kedungtuban, Nglandean and Ngraho and farmers who use the water flow Sunga by using a water pump 6 farmers (7:06%) in the two villages that cover ketuan and Jimbung, while average groundwater produced is 12.5 liters / sec.
KAJI EKSPERIMENTAL KECEPATAN PEMISAHAN BIODIESEL/GLISERIN TERHADAP KONSENTRASI TETESAN Drajat Indah Mawarni
SIMETRIS No 18 (2014): SIMETRIS
Publisher : Sekolah Tinggi Teknologi Ronggolawe Cepu

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Abstract

Kajian ini bertujuan untuk mengetahui tingkat kecepatan pemisahan (creaming velocity) antara dua fluida yang berfasa sama namun memiliki perbedaan densitas. Kajian ini dilakukan secara eksperimental dengan mengamati dan mengukur waktu pisah (settling time) pada tabung kaca dengan variasi diameter.Pengukuran waktu pisah dilakukan lima kali untuk setiap diameter tabung. Waktu pisah yang di peroleh digunakan sebagai dasar untuk menghitung diameter tetesan/droplet, konsentrasi tetesan, kecepatan pemisahan/creaming velocity dan Vstokes. Hasil perhitungan yang di peroleh diploting untuk membandingkan nilai konsentrasi tetesan (droplet consentration/Φ) terhadap kecepatan pemisahan (creaming velocity) pada campuran biodiesel/gliserin dan untuk mencari nilai Φc (fraksi volume fase biodiesel yang terdispersi rapat dalam gliserin/konsentrasi tetesan) dan k (konstanta pemisahan). Dari penelitian ini dapat disimpulkan bahwa semakin tinggi nilai konsentrasi tetesan (Φ) maka kecepatan pemisahannya (V cream) akan semakin berkurang dan dari persamaan Hunter bahwa V = Vstokes(1- )k.Φc , maka didapatkan nilai k dan Φc masing – masing adalah (5,1 ; 0,6 ; 1,2) dan (0,461 ; 0,9 ; 0,69) pada percobaan I, II, III dengan diameter tabung (1,3 ; 2,8 ; 3,9) cm.
PENERAPAN ALGORITMA VIOLA JONES UNTUK DETEKSI WAJAH Retno Wahyusari; Bambang Haryoko
SIMETRIS No 18 (2014): SIMETRIS
Publisher : Sekolah Tinggi Teknologi Ronggolawe Cepu

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Abstract

Deteksi wajah merupakan langkah awal dan fundamental dalam interaksi manusia, image retrieval, tracking, pengenalan wajah dan lain sebagainya. Saat ini detetksi wajah merupakan topik yang sangat menarik untuk diangkat menjadi penelitian. Algoritma viola jones merupakan standart defacto untuk deteksi wajah. Maka penelitian yang dilakukan menggunakan algoritma viola jones. Algoritma viola jones memiliki 3 konstribusi: citra integral, kontribusi kedua citra integral memungkinkan evaluasi fitur yang sangat cepat dengan menggunakan Adaboost dalam pemilihan fitur, dan yang ketiga penggunaan cascade classifier. Dari hasil penelitian menunjukkan nilai precission sebesar 94,95% dan recall sebesar 91,39% untuk dataset Baodataset. Sedangkan untuk data pribadi untuk precision sebesar 91,53% dan recall sebesar 80,60%.
STRATEGI PELESTARIAN LINGKUNGAN BERBASIS MASYARAKAT SEBAGAI UPAYA MENGHADAPI DAMPAK PERUBAHAN IKLIM (STUDI KASUS ABRASI DAN ROB PANTAI DESA BABALAN, WEDUNG, DEMAK) Fatchur Roehman
SIMETRIS No 18 (2014): SIMETRIS
Publisher : Sekolah Tinggi Teknologi Ronggolawe Cepu

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Abstract

Mewujudkan penyelesaian masalah perubahan iklim, maka penelitian ini bertujuan membuat model pelestarian lingkungan berbasis masyarakat di wilayah pesisir Desa Babalan, Kecamatan Wedung, Kabupaten Demak sebagai upaya menghadapi perubahan iklim dengan studi kasus dipesisir Kabupaten Demak. Metode yang digunakan adalah metode survey lapangan dengan menggunakan instrumen sebagai pedoman wawancara mendalam (in-depth-interviewing), observasi langsung, dan dokumentasi. Sumber informasi berasal dari warga masyarakat, tokoh masyarakat, dan aparat pemerintah. Teknik trianggulasi dilaksanakan selama pengumpulan data ini. Untuk menjaring data aspirasi masyarakat digunakan metode focus group discussion (FGD). Analisis data dilakukan dengan pendekatan kuantitatif dan kualitataif. Berdasarkan hasil analisis diketahui bahwa bencana Abrasi di pesisir Demak terjadi cukup parah berada di Desa Babalan. Upaya masyarakat menghadapi abrasi di daerah dilakukan dengan cara penanaman mangrove, peninggian lantai rumah, membuat rumah pangggung, sedangkan dukungan pemerintah berupa penyediaan bibit mangrove, perbaikan jalur jalan, pembuatan tembok pelindung gelombang, serta menyediakan lahan baru untuk relokasi penduduk.
Paraffin Sebagai Material Penyimpan Kalor Laten Agus Dwi Korawan
SIMETRIS Vol 13 No 1 (2019): SIMETRIS
Publisher : Sekolah Tinggi Teknologi Ronggolawe Cepu

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Abstract

Paraffin is a material that is easily obtained because it is sold in supermarkets, in addition to household needs, paraffin can be used as a thermal storage material, this is because paraffin has many good properties. To find out the properties needed as heat storage material, a DSC test was performed. Based on the test results and analysis, the results show values that are almost the same as the existing references.
OPTIMASI KONDISI PIROLISIS DAN PENGERINGAN PADA PROKSIMAT ARANG TEMPURUNG KELAPA DENGAN METODE TAGUCHI Nur Hayati
SIMETRIS Vol 12 No 1 (2018): SIMETRIS
Publisher : Sekolah Tinggi Teknologi Ronggolawe Cepu

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Abstract

The purpose of this research is to identify the effect of pyrolysis and drying on coconut shell charcoal proximate analysis. The method used in this research is Taguchi method. The independent variables used in this study were pyrolysis temperature (4500C, 5500C and 6500C), residence time (60 minutes, 90 minutes and 120 minutes), drying temperature (1000C, 1050C and 1100C) and drying time (12 hours, 18 hours and 24 hours). The response variable in this research is coconut shell charcoal proksimat value consisting of moisture content, ash content, volatile substance and bound carbon content. Orthogonal array used is L9(3)4. The results showed that the optimum condition for moisture content obtained in A1B1C1D1 condition means pyrolysis temperature 4500C, residence time 60 minutes, drying temperature 1000C and 12 hours drying time. The optimum condition for ash content obtained in A2B3C2D1 condition means pyrolysis temperature 5500C, residence time 120 minutes, drying temperature 1000C and 18 hours drying time. The optimum conditions for volatile substances obtained in A3B3C2D1 condition mean pyrolysis temperature 6500C, residence time 120 min, drying temperature 1050C and 12 hours drying time. The optimum conditions for the bonded carbon content obtained under A3B3C2D1 conditions mean pyrolysis temperature 6500C, residence time 120 min, drying temperature 1050C and 12 hours drying time.
Rancang Bangun Mesin Pembuat Deterjen Cair berkapasitas 50 liter/jam Nidia Lestari
SIMETRIS Vol 12 No 1 (2018): SIMETRIS
Publisher : Sekolah Tinggi Teknologi Ronggolawe Cepu

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Abstract

Technology continues to grow. Innovations continue to be developed, one of which is innovation on the type of detergent. Liquid detergents are an option used by today's society. The liquid detergent is more soluble than the solid detergent, minimizing the inhalation of solid detergent powder, and does not cause spots on the washing machine. Yogyakarta which is a city of education, attracts young people to come to study. This has an impact on improving the economy of the community. One of them is a laundry business. The design of this machine is done to save business capital where the laundry entrepreneur can make their own liquid detergent, even become the business field of Small and Medium Enterprises. Liquid detergents produced from these machines are better quality, more viscous and the process of mixing raw materials more quickly together and evenly distributed. The use of this machine saves power and time compared to manual or human power where the manufacturing process can be two hours to three hours to stir 50 liters of liquid detergent.
PERBANDINGAN SISTEM IRIGASI TENAGA LISTRIK DAN SOLAR SEL SEBAGAI ENERGI PENGERAK POMPA AIR METODE SRI Hariyanto Hariyanto
SIMETRIS Vol 12 No 1 (2018): SIMETRIS
Publisher : Sekolah Tinggi Teknologi Ronggolawe Cepu

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Abstract

Infrastructure in Kentong Village, Cepu Subdistrict, Blora Regency is needed to develop technology for economical and right targeted irrigation management to facilitate land management for farmers in all growing seasons, mostly only growing rice into the main income of farmers, decreased due to the operational cost of irrigation water pump 1 (one) season of Rp. 3.175.000 for electricity, the condition is not as stable. The main objectives to be achieved are: 1). Low Oprational Cost (none) 2). Application of Solar-based Irrigation cell 3). Optimizing farmers harvest 4). Increase farmer's income. The analytical method SRI (System of Rice Intensification) calculation to know water loss and water requirement in irrigation network by redesigning pumping energy with 10 meters depth planning which already has maximum water discharge, Solar cell as a means to release the discharge of water that is distributed to irrigation plots that can be flowed in every agricultural area. Changes in electric power irrigation systems with the application of Solar Cell as a source of energy The water pump is capable of producing 1200 watts of power with an output pump capacity of 1 inch of water volume obtained 35liter / min; 2,100 lt / hr capacity of solar cell 6 hours / day capacity of water volume for 6 hours ie 12.6 m3 / day. Rice crops 1 ha 200 m3 able to wet for 10 days with 2 cm water level above ground level. To achieve water demand 200 m3 solerel beker for 16 days
PEMBERSIHAN SAMPAH DI DASAR SUMUR MINYAK UNTUK MENINGKATKAN PRODUKSI Agus Dwi Korawan; Drajat Indah Mawarni
SIMETRIS Vol 12 No 1 (2018): SIMETRIS
Publisher : Sekolah Tinggi Teknologi Ronggolawe Cepu

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Abstract

Oil wells in Ledok village, Blora regency are old wells from the Dutch era, the wells are managed by local community groups, Crude oil from the wells are taken by Pertamina, partners get rewarded according to the specified price. Partner in the Community Partnership Program (PKM) activities is L212 oil well, the chairman is Mr. Agus Purwanto. Based on the analysis of the situation, the problem in this well is that a lot of garbage at the bottom of the well, this garbage prevents the source of oil coming out, as a result the crude oil is produced a little. The purpose of the PKM program is to increase the ability of partners and increase crude oil production. The method used is discussion, training, and mentoring. The results obtained from the implementation of PKM are skills enhancement and increased production capacity
Analisis Lebar dan Tebal Lapis Perkerasan Lentur Ruas Jalan Kali Angkrik Kabupaten Magelang Sudarno Sudarno
SIMETRIS Vol 12 No 1 (2018): SIMETRIS
Publisher : Sekolah Tinggi Teknologi Ronggolawe Cepu

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Abstract

Kaliangkrik road is a very important road connecting the sub-districts of Badongan and Kota Magelang. The road segment has decreased the level of service in terms of the volume of the vehicle, the width of the road and the condition of the structure. The purpose of this research is to know the width of road and the thickness of the pavement layer structure needed based on the calculation of the average daily traffic at the moment. Result of research indicate that in 2018, Kaliangkrik Road Area must be done by adding road width of 1.96m, and thickness of 3cm.

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