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INDONESIA
Jurnal Gamma
Published by Universitas Muhammadiyah Malang
ISSN : -     EISSN : -     DOI : -
Core Subject : Education,
Education
Arjuna Subject : -
Articles 8 Documents
 1 
Search results for , issue "Vol 8, No 1 (2012): September" : 8 Documents clear
COVER JURNAL GAMMA, VOL. 8, NO.1, SEPTEMBER 2012 ., Cover
Jurnal Gamma Vol 8, No 1 (2012): September
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Cover Jurnal Gamma, Vol. 8, No.1, September 2012
CATALITYC CONVERTER JENIS KATALIS PIPA TEMBAGA BERLUBANG UNTUK MENGURANGI EMISI KENDARAAN BERMOTOR Mokhtar, Ali
Jurnal Gamma Vol 8, No 1 (2012): September
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Catalityc Converter Jenis Katalis Pipa Tembaga Berlubang Untuk Mengurangi Emisi Kendaraan Bermotor Ali MokhtarStaf Pengajar Jurusan Teknik Mesin, Fakultas TeknikUniversitas Muhammadiyah MalangEmail : alimokhtar011@gmail.com, balimokhtar06@yahoo.co.idABSTRACTDecreased levels of exhaust emissions are influenced by the catalyst material and shape of  the catalyst, the catalyst model of perforated pipes showed oxidation and reduction process goes  well, it is shown that the levels of CO2   decreased by 49.7338%, while CO emissions fell by 36.904% and the emissions HC decreased by 28.354%. In general installation catalityc hollow pipe catalytic converter type can reduce exhaust emissions compared with using ctalityc converter.Key Word : copper pipe perforated catalyst
REKAYASA PROSES IRON SOFT MAGNETIC MELALUI MECHANICAL ALLOYING POWDER METALURGY BERBASIS SERBUK BESI LOKAL ., Murjito
Jurnal Gamma Vol 8, No 1 (2012): September
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REKAYASA PROSES  IRON SOFT MAGNETIC MELALUI MECHANICAL ALLOYING POWDER METALURGY BERBASIS SERBUK BESI LOKALMurjitoStaf Pengajar Jurusan Teknik Mesin, Fakultas Teknik Universitas Muhammadiyah Malang Email: moerjit@gmail.com, murjito@umm.ac.idABSTRACTSoft magnetic materials is a phenomenon that is interesting and unique, this uniqueness needs to be studied more deeply. Soft magnetic material (magnetic ferro) has been known since hundreds of years ago, but until now this process is still the process of making traditional process that is commonly used casting process. Casting process is still much to experience weaknesses and limitations, namely, melting energy is so high that no efficient, long process, the results can not be maximal, low dimensional accuracy, there is still further processes, and limited to certain elements, so that when it wants to make magnetic alloy of various elements or particles are still difficulties.To seek alternative production process of soft magnetic materials it is necessary to a solution or process engineering, on this occasion the researchers manipulate the process of soft magnetic material is iron with powder metalurgy mechanical alloying, in order to obtain the good soft magnetic iron and has high accuracy.In this study, researchers make the engineering process of soft magnetic iron production by mechanical alloying process based yan powder metalurgy local iron sands. Basis that the use of local sand backdrop of the results of the data that we can from raw materials and foundry industries penunjangsebagian materials are still imported. The ingredients are 100% pengadaanya still relies imported iron ore and materials are alloys (Alloy).The purpose of the study is the reverse process of soft magnetic iron by mechanical alloying of powder metalurgy process so that we will know the characteristics thermadinamika properties and mechanical properties of materials at various particle sizes up to the size of the micro / nano powder.Key word : soft magnetic materials, process engineering, mechanical alloying powder metalurgy
REDAKSI DAN PEDOMAN PENULISAN JURNAL GAMMA, VOL 8, NO. 1, SEPTEMBER 2012 Pedoman Penulisan, Redaksi &
Jurnal Gamma Vol 8, No 1 (2012): September
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Redaksi dan Pedoman Penulisan Jurnal Gamma, Vol 8, No. 1, September 2012
KORELASI ANTARA PENAMBAHAN ASPAL MINYAK PADA CAMPURAN PERKERASAN ASPAL BETON HASIL DAUR ULANG TERHADAP KARAKTERISTIK MARSHALL Ansyori Alamsyah, Alik
Jurnal Gamma Vol 8, No 1 (2012): September
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Korelasi Antara Penambahan Aspal Minyak Pada Campuran Perkerasan Aspal Beton Hasil Daur Ulang Terhadap Karakteristik MarshallAlik  Ansyori  AlamsyahStaf Pengajar Jurusan Teknik Sipil, Fakultas TeknikUniversitas Muhammadiyah MalangEmail: alik.syah@yahoo.comABSTRACTImproved  road  by  adding  extra  layers  of  constant  thickness  will  result  in increasingly thick layers of pavement and materials needed thining. Treatment with pavement  recycling  technologies  (recycling)  is  an  alternative  to  overcome  this problem because it has several  advantages such as to restore power and maintain the geometric road pavement and overcome dependence on new material. Recycling processed and supported by adequate equipment will  produce a mixture that can offset the value structure of the mixture. The addition of new  materials and or additional  materials  in the  former  material  scratching  the  old  pavement  is  one alternative to increase the carrying capacity of ex-scratching material.Research conducted at the Laboratory of Highway Muhammadiyah University of Malang. The quality of asphalt concrete recycled with the addition of new asphalt can be known through the Marshall test results (stability, flow plastically, the results for the marshall, and the cavity in the mix). The binder used was 60/70 penetration bitumen with each variation with the addition of 0.5%, 1%, 1.5%, 2%, and 2.5%. From the result showed that the addition of new asphalt on a mixture of  recycled asphalt to improve the power tie. Optimum asphalt content based on the value of stability, flow, and Marshall Quotient amounted to 7.25% of the total weight of the mixture, then there was  an increase of 0.45% asphalt needs of optimum asphalt content of 6.8%.Keywords : Marshall stability, recycling, asphalt.
DESAIN INTERKONEKSI BIOREAKTOR SAMPAH PADAT PERKOTAAN DENGAN MODEL SIRKULASI AIR LINDI ANAEROB UNTUK MENINGKATKAN PRODUKSI GAS METHANE Septiropa, Zamzami
Jurnal Gamma Vol 8, No 1 (2012): September
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Desain Interkoneksi Bioreaktor Sampah Padat Perkotaan Dengan Model Sirkulasi Air Lindi Anaerob Untuk Meningkatkan Produksi Gas MethaneZamzami SeptiropaStaf Pengajar Jurusan Teknik Sipil , Fakultas TeknikUniversitas Muhammadiyah Malang,e-mail :  zamseptiropa@umm.ac.idABSTRACTThe existence of gravity of the pressing weight of its own garbage heap of garbage will be squeezed to make trash (pressing) and out of the leachate (Leachate). Contained in the waste leachate has elements glokosa (C6H12O6), Amino Acid and Ammonia (NH3), which will help the growth of anaerobic  bacteria  that  produce  methane  (CH4)  and  carbon  diaoksida  (CO2).  Humidity  will  be reduced as the discharge of garbage in garbage leachate resulting decline in productivity of anaerobic bacteria, thus maintaining levels of humidity (moisture content) is very important in stabilizing the productivity of anaerobic bacteria.In  the  humidity  of  59.85%  productivity  waste  anaerobic  bacteria  produce  landfill  gas  in stagnant in the  range  of  less  than  10%  CH4.  With  a  circulation  process  of  garbage  leachate  to maintain moisture of 67.25% are able to stabilize the production  of landfill  gases, especially CH4 concentration more than 25%. Leachate circulation periodically able to stabilize the moisture content of waste, from which the waste water content, it makes the productivity of stable anaerobic bacteria produce methane gas in concentrations between 20% -25% is quite a power plant of energy.Renewable energy was from waste to be more realistic to be implemented in full scale in place of final processing (TPA) / Landfill.  So the need for energy for the benefit of the power plant could help meet the electricity needs of the community.Keywords: bioreactor anaerobic, leachate circulation
DESAIN DAN PEMBUATAN INKUBATOR BERDASARKAN DISTRIBUSI TEMPERATUR ., Budiono
Jurnal Gamma Vol 8, No 1 (2012): September
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Desain dan Pembuatan Inkubator berdasarkan Distribusi TemperaturBudionoStaf Pengajar Jurusan Teknik Mesin, Fakultas TeknikUniversitas Muhammadiyah Malang Email : budiono_ssi_mt_umm@yahoo.comABSTRACTWhen a new born babies (especially premature babies) have not been able to adjust to the temperature  outside.  One  of  the  standard  post-neonatal  procedures  are  all  newborns  should  be incorporated into the incubator, the time it takes depends on the level of health, durability and infant organ system itself. In this case the infant incubator is one tool that can help the newborn to adapt with the outside world, because the conditions in the womb to the outside world is very different, especially at a temperature problem. So with regular heating system so the baby can adapt to the transition period.Therefore, newborns should be helped to adjust to the new environment by putting them into the incubator. Infant incubator temperature is slowly lowered so that it can make the baby feel comfortable. In order for your baby comfortable at room temperature, then the distribution must evenly in incubator. To determine the pattern of temperature distribution in the incubator at my research will provide solutions to design and create an  incubator temperature distribution based on the simulation results based on numerical approach with Matlab programKeywords: incubator, distribution, matlab
RANCANG BANGUN ALAT KONTROL BEBAN ELEKTRONIK DIGITAL PADA PEMBANGKIT LISTRIK TENAGA MIKROHIDRO (PLTMH) OFF-GRID Effendy, Machmud
Jurnal Gamma Vol 8, No 1 (2012): September
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RANCANG BANGUN ALAT KONTROL BEBAN ELEKTRONIK DIGITAL PADA  PEMBANGKIT LISTRIK TENAGA MIKROHIDRO (PLTMh) OFF-GRIDMachmud EffendyStaf Pengajar Jurusan Teknik Elektro, Fakultas Teknik Universitas Muhammadiyah MalangEmail: machmudeffendy@yahoo.comABSTRACTElectronic load control device (ELC) at the MHP Digital Off-Grid (not connected to the PLN) replaces previous controls are still using analog systems (Machmud, 2008), because analog systems have drawbacks including: difficult to perform the initial setup of the generator voltage stability in the event of changes in consumer loads, so that the percentage error generator voltage and frequency stability is still quite large. In 2010 (Machmud) makes ELC models using Matlab with the PI system that is able to stabilize the voltage of the generator at the second to 8.These results continue the previous research by designing wake ELC using microcontroller system that is equipped with PID control. Series of ELC supporters were also made, among others: the sensor circuit voltage, zero detection circuit, and electronic switch circuit. Voltage sensor circuit that has been made to have the voltage linearity level of 0.997. While the time required to trigger the triac with a maximum of 1000 Ohm load is between 0 to 10 milliseconds.PID system is created using the C language and loaded into the microcontroller IC is able to stabilize the voltage generator in the event of changes in the electrical load. With menggunakann value Kp = 4, Ki = 0:01, the system is able to stabilize the voltage of the generator in the event of changes in the electrical load 100 and 500 Ohm 0hm in seconds to 8 parameters Kp in PID control system is applied to the electronic load control devices MHP does not cause changes significant at keluran controller, so its value can be ignored.keyword: PLTMh, Digital Control

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