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All Journal TEKNIK Rotasi GEMA TEKNOLOGI METANA Jurnal Ilmiah Informatika Komputer Jurnal Pendidikan dan Pembelajaran AGROTEKBIS Journal on Mathematics Education (JME) Jurnal Varidika BALANCE JOURNAL Jurnal Wahana Kajian Pendidikan IPS Berkala Ilmiah Pendidikan Fisika Manajemen Pendidikan Phinisi Integration Review JURNAL SERAMBI ILMU Jurnal Kolaboratif Sains Jurnal Endurance: Kajian Ilmiah Problema Kesehatan Jurnal Ilmiah Ecosystem Jurnal Kesehatan Ibu dan Anak Jurnal Keperawatan Respati Yogyakarta Jurnal Aisyah : Jurnal Ilmu Kesehatan ILTEK : Jurnal Teknologi Jurnal Ilmiah Pendidikan Anak (JIPA) Ilmu Pendidikan Jurnal Ilmiah Abdi Mas TPB Unram
Murni Murni
SD Negeri 010048 Sei Alim Hassak
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PENGARUH TEMPERATUR SOLAR TERHADAP PERFORMA MESIN DIESEL DIRECK INJECTION PUTARAN KONSTAN Murni, Murni
TEKNIK Volume 33, Nomor 1, Tahun 2012
Publisher : Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (655.846 KB) | DOI: 10.14710/teknik.v33i1.3790

Abstract

The imperfect combustion process will be a problem in the development effort of diesel engine’s performance.Nonhomogen air–fuel mixing process is one of the factors which cause the imperfect combustion.By heating upthe diesel solar up to a certain temperature before it goes through the high pressure injection pump will lowerits density and viscosity. Therefore, when injected in the combustion chamber, it will formed smaller droplets offuel spray which result in a more homogenious air–fuel mixture. Also by using higher temperature will make thediesel fuel easier to ignite in order to compensate the limited time which is available in high speed operatingconditions. Diesel engine Dong Feng 1 cylinder direct injection at constant speed was used in this research. Thefuel used are solar with temperature variations in the range from 30oC to 70oC . The best thermal efficiency forsolar fuel is 30 % at 60oC with 28 % BSFC. In this condition, the fuel consumption was decreased 4 % bycomparing with that at 30oC.
KAJI EKSPERIMENTAL PENGARUH TEMPERATUR BIODIESEL MINYAK SAWIT TERHADAP PERFORMANSI MESIN DIESEL DIRECT INJECTION PUTARAN KONSTAN Fajar, Berkah; Utomo, Tony Suryo; Murni, Murni
ROTASI Volume 11, Nomor 3, Juli 2009
Publisher : Departemen Teknik Mesin, Fakultas Teknik, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (143.674 KB) | DOI: 10.14710/rotasi.11.3.28-31

Abstract

The imperfect combustion process will be a problem in the development effort of diesel engine’sperformance. Nonhomogen air–fuel mixing process is one of the factors which cause the imperfectcombustion.By heating up the diesel biodiesel up to a certain temperature before it goes through thehigh pressure injection pump will lower its density and viscosity. Therefore, when injected in thecombustion chamber, it will formed smaller droplets of fuel spray which result in a morehomogenious air–fuel mixture. Also by using higher temperature will make the diesel fuel easier toignite in order to compensate the limited time which is available in high speed operating conditions.Diesel engine Dong Feng 1 cylinder direct injection at constant speed was used in this research. Thefuel used are biodiesel with temperature variations in the range from 33oC to 90oC . The best thermalefficiency for biodiesel fuel is 25.3 % at 70oC with 28 % BSFC. In this condition, the fuelconsumption was decreased 8 % by comparing with that at 33oC.
PENGARUH SUHU BAHAN BAKAR TERHADAP KEPERLUAN BAHAN BAKAR PADA MOTOR DIESEL SATU SILINDER 20 HP DENGAN ELEKTROLISER Sutomo, Sutomo; Murni, Murni; Rahmat, Rahmat
Gema Teknologi Vol 16, No 3 (2011): April 2011 - October 2011
Publisher : Vocational School Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (150.855 KB) | DOI: 10.14710/gt.v16i3.4708

Abstract

Sutomo, Murni, Rahmat, An internal combustion process of fuel will works effectively if the fuel’s density and viscosity is lower so we would like to use a heater in order to decrease the density and viscosity of the fuel. Based on this condition, we would like to use an electrolizer and a diesel engine to improve the fuel consumption. Electrolizer will increases the gas reaction so we hope that fuel consumption rate will decrease. The result of this research is the effective temperature of fuel is 50oC – 60oC will produce the effective combustion. The fuel consumption decreased in 6 kW is 0.12 lt/kWH. Key word: diesel engine, electrolizer, temperature
PENGARUH ELEKTROLISER TERHADAP KEPEKAAN BAHAN BAKAR PADA MESIN DIESEL 1 SILINDER 20 HP Sutomo, Sutomo; Murni, Murni; Senen, Senen; Rahmat, Rahmat
Gema Teknologi Vol 16, No 2 (2011): October 2010 - April 2011
Publisher : Vocational School Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (102.248 KB) | DOI: 10.14710/gt.v16i2.1651

Abstract

Sutomo, Murni, Senen, Rahmat, Electrolyzer is development of a electrolysis technology to produce HHO gas, or Brown’s gas. Diesel engine use solar (diesel oil) as combustion’s material to produce thermal energy and oxidation and will be changed to mechanic energy. The base product of thermal energy by oxidation diesel oil, is would like to use electrolyzer to produce HHO and insert to the fuel combustion. Because HHO is a reactive gas, so in our research we hopeful will increase the thermal energy in combustion process and decrease the diesel oil consumption. The result of this research is the BSFC (Brake Shat Fuel Consumption) will decrease 2.5% up to 3.2%.   Key word: electrolyzer, diesel engine, BSFC
RANCANG BANGUN DIGESTER SEMI KONTINYU PADA PRODUKSI BIOGAS DAN PUPUK ORGANIK DARI SAMPAH ORGANIK Ikhsan, Diyono; Handayani, Dwi; Murni, Murni
METANA Vol 9, No 02 (2013): Desember 2013
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (98.768 KB) | DOI: 10.14710/metana.v9i02.7611

Abstract

Abstract Production of biogas and organic fertilizer from organic waste is done by creating a semi-continuous digester design is a flat pipe and operate continuously or bait can be inserted periodically every day, and its products can be taken periodically at any time. At the optimum residence time can be designed digester volume corresponding to a certain capacity, the variation ratio of the length and diameter of the pipe, whichever is best for optimum biogas production. Outcomes of the research is a prototype digester flat pipes that can operate semi-continuous along with its performance test. Design semi-continuous digester using pralon pipe diameter of 6 in, with the length of each digester m A = 2, B = 4 m, and C = 6 m, equipped hopper for feeding suspension, bulkhead divider so that biogas does not leak, and the stirrer tank float models. The results showed that the biogas production on day 7 to day 30, there was an increase biogas production sharply, after it approaching constant and up to 60 days tended to decline. In the longer digester (B and C) there are fluctuations in the production of biogas. From the graph the relationship between the capacity of the biogas production time from day 1 to day 60 following polynomial equation with a similar pattern, for the digester with the equation y = A + 2,287x -0,026x2 - 8.577 (R¬2 = 0.966); digester B with the equation y = -0,026x2 2,297x + - 8.683 (R 2 = 0.963); and digester C with equation y = -0,025x2 2,232x + - 8.886 (R 2 = 0.962). Mud coming out at the end of the digester after 30 days was collected and dried as organic fertilizer. Results of laboratory analysis, showed the water content 10.72%, 44.05% organic C content, C / N Ratio 25.70, total P2O5 content of 0.67% and 7.71% N levels. This suggests that these parameters meet the quality standards of organic fertilizers except C / N Ratio greater. But this is not a problem because the levels of organic C and N levels separately meet quality standards. Keywords: digester, biogas, organic fertilizer
Peningkatan Produksi Garam Beryodium Melalui Aplikasi Alat Pencetak Garam Secara Mekanik Handayani, Dwi; Murni, Murni; Ikhsan, Diyono; Arifan, Fahmi
METANA Edisi Khusus Februari 2011
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (4919.381 KB) | DOI: 10.14710/metana.v0i0.1629

Abstract

The salt moulder groups "Muji Rahayu" have a mission for drummed up salt moulders by are very limited, by process technology conventionally. The result of production is salt_powder  which is a gunny_pack then on sale at the prince of low. If it is soled in salt_moulder, the price will increase. Salt moulder form of Instrumentation which it is has incereased quality and sale at the prince salt iodized consumption. However, at the employe moulder machine which is continue, the machine has trouble because it is always related to salt which have a character is corrosive. Therefore, it needs to have a salt_moulder which is simple and easy to be operated by salt-farmer moreover the price is cheap. The salt moulder will work by mechanic and aplication style. Because of the caracter of salt which corrosive, so the contraction which related to salt is made by stainless steel. By the expectation it be able to increase the income of salt_farmers. Keywords : iodized salt, salt moulder
IbM.KELOMPOK INDUSTRI SERBUK INSTAN JAMU DAN MINUMAN KESEHATAN DI UNGARAN, KABUPATEN SEMARANG Handayani, Dwi; Ikhsan, Diyono; Murni, Murni; Ardiansari, Anindya
METANA Vol 10, No 02 (2014): Desember 2014
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1022.378 KB) | DOI: 10.14710/metana.v10i02.11046

Abstract

Abstract UMKM" TigaDara " which is located at Jl . UripSumoharjo 45 and UMKM " Berliana " address at 7 Kuncen New jl.ApelUnggaran - Kab.Semarang an economically productive UMKM as micro businesses , with a production of herbs or a health drink in the form of instant powder and liquid beverages . Early in its development , the effort focuses on the various processing plants living pharmacies ( empon - empon ) are made ​​into a variety of herbs and health beverages in an instant form , for example : instant ginger , white turmeric , saffron , turmeric, tamarind , Mahkotadewa , etc. . During this production process  been conventional and instant powders produced by high sugar levels that can not be consumed by diabetics . Given that in order to produce sugar -free powder that requires technology and modern processing equipment , namely the granulation process , it is necessary to support the introduction of technology and the granulation equipment . While UD Berliana now more concentrated on liquid products requiring wringer empon - empon that can operate mechanically with greater capacity and semi-continuous operation . Given that during the management system implemented is still a family management , then with the development of business and the broader marketing outreach is necessary to improve management and use of the Web to expand their marketing reach . With the help of technology , equipment and granulation managemen as wringer and structuring the results of this activity can be rapidly growing SMEs . This is evident from the production capacity that was originally only 50 kg per day to 200 kg per day , followed by an increase in network marketing , and sales revenue . Keyword :Teknology, granulation, wringer, Web. Abstrak UMKM ”Tiga Dara” yang beralamat di jl. Urip Sumoharjo 45 dan UMKM ”Berliana” yang beralamat di jl.Apel No.7 Kuncen Baru Ungaran-Kab.Semarang merupakan UMKM  yang produktif secara ekonomis sebagai usaha mikro, dengan produksi berupa jamu atau minuman kesehatan dalam bentuk serbuk instan dan minuman cair. Selama ini proses pengolaahan dilakukan secara konvensional dan dihasilkan serbuk instan dengan kadar gula yang tinggi sehingga tidak bisa dikonsumsi oleh penderita diabetes. Mengingat bahwa untuk dapat memproduksi serbuk yang bebas gula memerlukan teknologi dan peralatan proses yang modern, yaitu dengan proses granulasi, maka perlu adanya bantuan pengenalan teknologi dan peralatan granulasi tersebut. Sedangkan UD Berliana sekarang ini lebih mengkonsentrasikan pada produk cair sehingga membutuhkan alat pemeras empon-empon yang dapat beroperasi secara mekanik dengan kapasitas yang lebih besar dan beroperasi secara semi kontinyu. Disamping itu, mengingat bahwa  selama ini sistem manajemen yang diterapkan masih merupakan manajemen keluarga, maka dengan semakin berkembangnya usaha dan semakin luasnya pemasaran diperlukan adanya penyuluhan perbaikan manajemen dan penggunaan Web untuk memperluas jangkauan pemasarannya. Dengan adanya bantuan teknologi, peralatan dan penataan manajemennya maka UMKM tersebut dapat berkembang pesat. Hal ini terlihat dari kapasitas produksi yang pada awalnya hanya 50 kg per hari menjadi 200 kg per hari yang diikuti dengan peningkatan jaringan pemasaran dan omset penjualannya. 8Kata kunci : Teknologi, granulator, pemeras, Web.
IMPROVING THE REASONING ABILITY OF ELEMENTARY SCHOOL STUDENT THROUGH THE INDONESIAN REALISTIC MATHEMATICS EDUCATION Ginting, Muhamad Saleh; Prahmana, Rully Charitas Indra; Isa, Muhammad; Murni, Murni
Journal on Mathematics Education Vol 9, No 1 (2018)
Publisher : Department of Doctoral Program on Mathematics Education, Sriwijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22342/jme.9.1.5049.41-54

Abstract

By taking the role as a mentor and a facilitator, a teacher in the 4th grade of elementary school needs to look at the condition of the students in the concrete thinking stage. Learning process needs to be adjusted such that the abstract objects in mathematics can be represented through concrete objects as a bridge to enter the knowledge that the students already had, especially for the material of fraction. This research aims to analyze the achievement and the improvement of students’ mathematics reasoning ability through the implementation of Indonesian realistic mathematics education (PMRI) approach. The research subject consisted of 51 students in the experiment group and 45 students in the control group which categorized into three levels (low, intermediate, and high). The result suggests that the achievement and the improvement of students’ reasoning ability in the mathematics learning using PMRI approach are better than the conventional learning.DOI: http://dx.doi.org/10.22342/jme.9.1.5049.41-54
PARALELISASI PERKALIAN MATRIKS SPARSE – VEKTOR DENGAN CUBLAS Murni, Murni
Jurnal Ilmiah Informatika Komputer Vol 20, No 2 (2015)
Publisher : Universitas Gunadarma

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Perhitungan perkalian matriks-vektor sangat dibutuhkan dalam menyelesaikan berbagai permasalahan perhitungan di dunia nyata, seperti dalam menentukan solusi dari suatu sistem persamaan linier. Ukuran matriks yang besar dapat berdampak pada lamanya proses perhitungan yang dilakukan sehingga berimplikasi terhadap akurasi dari hasil perhitungan yang tidak real-time. Adapun matriks sparse yang digunakan pada makalah ini adalah sepuluh buah matriks yang dibangkitkan secara acak. Adapun pemrograman paralel untuk melakukan perhitungan perkalian matriks sparse dengan vektor menggunakan Compute Unified Device Architecture (CUDA) dengan library cuBLAS. Berdasarkan ujicoba perkalian sparse matrix-vector tersebut diperoleh hasil speed-up mencapai  lebih cepat dengan menggunakan GTX-950M serta  lebih cepat dengan menggunakan Quadro K4200. Kata kunci: Matriks Sparse, CUDA, cuBLAS
PROSEDUR PARALELISASI PERKALIAN MATRIKS PADA GRAPHICS PROCESSING UNIT (GPU) Murni, Murni
Jurnal Ilmiah Informatika Komputer Vol 22, No 3 (2017)
Publisher : Universitas Gunadarma

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Perkalian matriks adalah operasi yang sangat sering diperlukan pada berbagai permasalahan komputasi. Adapun beberapa permasalahan yang seringkali membutuhkan perhitungan numeris yang melibatkan perkalian matriks, diantaranya adalah prakiraan cuaca, bidang bioinformatik, ekonomi serta demografi. Perkalian ini dapat dipercepat dengan menggunakan pemrograman paralel.  Dengan demikian, makalah ini akan membahas mengenai prosedur paralelisasi perkalian matriks yang dilakukan melalui pemrograman paralel pada Graphics Processing Unit (GPU). Prosedur paralelisasi perkalian matriks pada GPU dilakukan dengan menentukan jumlah thread yang dibutuhkan untuk melakukan komputasi pada GPU. Kata Kunci: GPU, Matriks, Thread
Co-Authors A.A. Ketut Agung Cahyawan W Abdul Malik Agus Syahrani Alimudin Laapo Amrazi Zakso Andayaningsih, Sri Anindya Ardiansari Anwar, Asni Bambang Setyoko Barlian, Barlian Berkah Fajar Tamtomo kiono Burhanuddin Burhanuddin Dahlan Susilo Darman Manda Manda Darmawati Darmawati Diyono Ikhsan Dwi Handayani Esthi, Franata Suriana Fahmi Arifan Firdhaus Hari Saputro Al Haris Fitra Mayenti Gusti Budjang Hamsah, Hamsah Ihsan, Andi Indrayani, Ninik Ismaniar Ismaniar Ismunandar Jamiludin, Jamiludin Mapatoba, Marhawati Muhammad Isa Murshal Manaf, Murshal Permata Ganggi, Roro Isyawati Rahayu, Usiyani Rahmat Rahmat Rani Tiyas Budiyanti Ratna Wardani Rully Charitas Indra Prahmana Salam, Rahmi Ariani Samsidar Samsidar Senen Senen Seno Darmanto Setiawati, F S Nugraheni Slamet Widodo Sutomo Sutomo Tony Suryo Utomo Umar, Bowasis Windu Sediono Yundari, Yundari