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All Journal Jurnal Manajemen dan Agribisnis Jurnal Teknik Industri Autotech: Jurnal Pendidikan Teknik Otomotif Universitas Muhammadiyah Purworejo Media Gizi Mikro Indonesia ENGINEERING Elkom: Jurnal Elektronika dan Komputer Jurnal Optimasi Sistem Industri Geoid - Journal of Geodesy and Geomatics JPBM (Jurnal Pendidikan Bisnis dan Manajemen) Jurnal Pendidikan Bisnis dan Manajemen Jurnal Pendidikan Ekonomi & Bisnis (Edisi Elektronik) Majalah Ilmiah Biologi BIOSFERA: A Scientific Journal Psikodidaktika: Jurnal Ilmu Pendidikan, Psikologi, Bimbingan dan Konseling JURNAL LENTERA PENDIDIKAN PUSAT PENELITIAN LPPM UM METRO Jurnal Teknologi Informasi dan Komunikasi Jurnal Perspektif Jurnal USAHA SOROT: Jurnal Pengabdian Kepada Masyarakat
Agus Wibowo
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Does the Role of Supervisors Determine Doctoral Students’ Success? Budi Santoso; Indra Fahrizal; Marsofiyati Marsofiyati; Agus Wibowo
JPBM (Jurnal Pendidikan Bisnis dan Manajemen) Vol 7, No 3: NOVEMBER 2021
Publisher : JPBM (Jurnal Pendidikan Bisnis dan Manajemen)

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

Abstract

The purpose of this study was to analyse the effect of the role of supervisor and procrastination on the success of doctoral studies. The sample of this research was 149 alumni of the doctoral program in Indonesia who are taken randomly. A causal study using SEM PLS was implemented with Multi Group analysis (MGA) based on work groups between lecturers and non-lecturer employees. The results of this study indicated that the role of supervisor has a positive effect on the success of the study both as a whole and per group. The role of supervisor has a positive and significant effect on overall procrastination, but differs within the group, for lecturers it is not significant while for non-lecturers is significant. Procrastination as a whole sample has no significant effect on the success of doctoral study, as well as within the group. This can be concluded that the supervisor's role plays an important role in increasing the success of doctoral students' studies.Keywords: Success of study, role of supervisor, Procrastination.
PENGARUH PEMANASAN ELEKTRODA LAS PADA SUHU 80-120ºC TERHADAP SIFAT MEKANIK Zulfah .; Agus Wibowo; Cusanto Aji Aji
Engineering : Jurnal Bidang Teknik Vol 2 No 1 (2011): April
Publisher : Universitas Pancasakti Tegal

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (291.46 KB) | DOI: 10.24905/eng.v2i1.89

Abstract

This Research purpose to know :  (1) Nature of mechanic to influence of warm-up of electrode las (2) Require to do of further research by adding the further variation that is examination Penetran and Radiografi (3) Menetahui hardness of result pengelasan after electrode in heating with selected heat.Pursuant to hypothesis test that writer only using the steel type to in ujikan that is type become militant ST 41 by using electrode las type RD 260 with diameter of 4,0 x 350 mm. Examination result show the existence of the influence signifikan [among/between] electrodes which have through warm-up process and the electrode tampa through warm-up, specially for interesting examination, impack or beat, and examination of hardness where in each;every examination of writer do 3 spesiment in each;every his examination.Way obtain;get the data by using temperature grader [at] industrial kitchen [of] electrics ( Heater Elektroda Las) that is to know the hardness storey;level found on electrode membrane las specially type RD 260 with electrode diameter of 4,0-350mm.Influence of warm-up of electrode las [at] temperature of 80-120°C to nature of mechanic done [by] during 15-30 minute in kitchen induce the electrics [so that/ to be] obtaining the maximal result. used machine for interesting examination  is machine test the type Shimadzu UH 1000 kNI, for examination beat [is] to the type test : Hang Ta, HT-8941, is while examination of hardness of writer use the machine test the type : A ffri 206 RT.Keywords: Nature of mechanic to of warm up of elektroda
ANALISA SISTEM PEMBANGKIT THERMOELEKTRIK DENGAN RANGKAIAN PARAREL PADA PEMANFAATAN PANAS BUANG MESIN TOYOTA COROLLA EFI Agus Wibowo; Zulfah .; Prawiro Anggianto
Engineering : Jurnal Bidang Teknik Vol 2 No 1 (2011): April
Publisher : Universitas Pancasakti Tegal

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (376.74 KB) | DOI: 10.24905/eng.v2i1.93

Abstract

In the coming year is estimated to be growing energy needs increased by about 40% ofcurrent needs,  as  we know  from  100% fuel  used by  only  about 30% that  is used  to  drive thecar. part of the energy wasted in the form of the radiator and the gas is wasted purpose ofThis  analysis  is  to determine  how to  utilize  waste  heat  energy  in  toyota  corolla  engineefficiently  into  energy  useful  to the  system  and  to determine the  effect  thermolektrik  parallel circuit  thermoelektrik  components  generated  strong  currents  and  voltages  generatedelectricity in accordance with the type of materials used.In  writing  this essay  the author  collected  data  -  data  with  methods of  literature, interviews and observation.There results can be conclude (1) for exhausted heat energy in Corrola EFI Toyota engines are asw follows. Arranging thermoelektrik with parallel circuit which is mounted on the exhaust side, turn the machine with 1000 rpm engine speed, gradually up to 300 0 rpm. Start measuring the temperature of top and bottom of these thermoelektrik, and also a strong measure of current, voltage to be produced thermoelektrik. There we received the results from the engine exhaust heat is on with a series of parallel thermoelektrik. (2) there researchon the  influence of  these  parallel  series  of  studies  thermoelektrik  components  that  wereassembled  in  parallel  to  produce  strong  currents  and tension  resulting  from the  wasteexhaust  heat  is wasted.  at  1000  rpm  to produce  strong  currents  of  0.5  degrees  Celsiusampere  and  voltage  of  0.9  volt  temperature  -  average  above  45  degrees  Celsius,  the temperature  -  average  95  degrees  Celsius  below  1500  rpm  to produce  strong  currents  of  0.9ampere and voltage of 1 volt and temperature - average 59 degrees Celsius.temperature  -  average  below  111  degrees  Celsius.  2000  rpm  producing  a strong  current  of  1ampere  and  voltage  of  1.2  volts  and  temperatures  average  61  degrees  Celsius,  the temperature  -  average  below  119  degrees  Celsius,  2500  rpm  producing  a strong  current  of1.5  amperes  and the  voltage  at  1,  5  volts  and  temperature  -  average  56  degrees  Celsius,  the temperature – average below 123 degree Celsius. 3000 rpm to produce strong currents of 1.5amperes  and the  voltage  of  2  volts  and  temperature  -  average  61  degrees  Celsius,  the temperature  -  average  below  127  degrees  Celsius.  if  understood  parallel  pengaruhrangkaianis still very small to generate strong currents and voltages. the stronger the currents used, the greater the stronger the smaller the current and voltage and vice versa.Key words : ampere, temperature, voltase, thermoelektrik
ANALISA PENGARUH PENGGUNAAN CATALYTIC CONVERTER PADA MESIN MOTOR EMPAT LANGKAH TERHADAP PENURUNAN EMISI GAS BUANG Zulfah .; Agus Wibowo; Untung Hartoni
Engineering : Jurnal Bidang Teknik Vol 2 No 2 (2011): Oktober
Publisher : Universitas Pancasakti Tegal

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (151.467 KB) | DOI: 10.24905/eng.v2i2.102

Abstract

Using the motorcycle which is more, it is influenced the pollution from the exhaust pipe in  the air. The contains of Carbonmonocsida (CO), Oksida Nitrogen (NOx), Hydrocarbon (HC) and the other things which are accumulated and will be influenced the human’s healthy and finally it is caused die.The collecting data is taken directly by researcher from the laboratory and also from the source from the person in  which  is called an interview and it had been documented in well, the documentation is connecting wich the gas and pollution. The development of Catalytic Converter had been reducing the pollution, but it is not maximize. Adding the plat of cooper in Catalytic Converter will be an alternative to reduce the pollution on it. From the research the writer get the data before using the Catalytic Converter the four stroke exhaust pipe produced 2,238 %  CO volume, HC 222,8 ppm volume. The second research on the standard exhaust pipe produced 1,66 % CO and HC 131 ppm volume. The research which is given the cooper Catalytic Converter produced only 1,66 % CO and HC 71,4 ppm volume. From the data the writer  can conclude that cooper Catalytic Converter able to reduce the pollution from the motorcycle.Keywords: Pollution, Catalytic Converter, Cooper.
PENGGUNAAN TEOREMA PI BUCKINGHAM PADA PENYELIDIKAN LOST HEAD UNTUK PIPA MENDATAR DENGAN ALIRAN TAK KOMPRESIBEL TURBULEN Indah Eko Cahyani; Agus Wibowo
Engineering : Jurnal Bidang Teknik Vol 2 No 2 (2011): Oktober
Publisher : Universitas Pancasakti Tegal

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (157.989 KB) | DOI: 10.24905/eng.v2i2.108

Abstract

Lost  head  can be interpreted  as a decrease  in  the pressuregradient  and is a measure  of  resistance  to  flow  through the  pipe. Barriers  to  flow  through the  pipeline  will greatly  affect  the  power needed  in  moving the  fluid  so that the  investigation of the  losthead  on  pipe  important thing to do.  Use of  Buckingham  Pitheorem  for  dimensional  analysis  will make it easier  to analyzeand  make the  move  quicker  and directed  experiments.  With theinitial data  is a function  of the  barrier  pipe diameter,  fluidviscosity,  fluid density,  pipe length, the fluid velocity  and theroughness of  the pipe.  The results indicate  a lost  connection  headper  weight of  the fluid  (w p /)  is proportional to  the piperoughness  factor  (f) is proportional to  the length of  pipe  per  pipe diameter  (L  /  d) is proportional to  the  fluid velocity  kuwadrat  pertwo times gravity (v2/2g)Keywords: Lost head, turbulent flow, the flow channel is closed
ANALISA PENGARUH BAHANBAKAR BIOETHANOL E-30 (BENSIN 70% -ETHANOL30%), E-50 (BENSIN 50% - ETHANOL 50%), E-100 (ETHANOL 100%) TERHADAP DAYA DAN TORSI MESIN 4 LANGKAH Eko Hadisiswanto; Agus Wibowo; A. Farid
Engineering : Jurnal Bidang Teknik Vol 3 No 1 (2012): April
Publisher : Universitas Pancasakti Tegal

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1126.678 KB) | DOI: 10.24905/eng.v3i1.111

Abstract

Bahan bakar alternatif bioethhanol E-10, E-15 sudah banyak dipergunakan pada kendaraan bersilinder 1 dan kendaraan bersilinder 4 karena angka oktan pada bahan bakar tersebut tinggi sehingga dalam pembakaran dalam ruang bakar akan sempurna karena pada pembakaran yang sempurna akan menaikan angka torsi.Tujuan penelitian adalah untuk mengetahui pengaruh bahan bakar alternatif bioethanol (E-30, E-50, E-100) terhadap daya dan torsi mesin 4 langkah dengan menggunakan bahan bakar bioethanol E-30, E-50, E-100 yang akan diuji dengan metode eksperimen menggunakan dynotest untuk di peroleh hasil daya dan torsinya. Hasil eksperimen menunjukan bahwa penggunaan bahan bakar alternatif bioetahanol E-30, E-50, E-100 pada pengujian  daya diperoleh daya tertinggi pada 3000 Rpm yaitu 1.01 HP terletak pada E-50, pada, 3500 Rpm yaitu 2.35 HP terletak pada E-50, pada 4000 Rpm yaitu 2.40 HP terletak pada E-50, pada 4500 Rpm yaitu 3.73 HP terletak pada E-50, pada 5000 Rpm yaitu 3.77 HP terletak pada E-50, pada 5500 Rpm yaitu 3.68 HP terletak pada E-30, pada 6000 Rpm yaitu 3.68 terletak pada E-50 sedangkan pada pengujian torsi diperoleh torsi tertinggi pada 3500 Rpm yaitu 0.215 kgf.m terletak pada E-50, pada 4000 Rpm yaitu 0.380 kgf.m terletak pada E-50, pada 4500 Rpm yaitu 0.498 kgf.m terletak pada E-50, pada 5000 Rpm yaitu 0.515 terletak pada E-50, pada 5500 Rpm yaitu 0.497 terletak pada E-50, pada 6000 Rpm yaitu 0.450 kgf.m terletak pada E-30.Kata Kunci : Bioethanol, Dynotest, Daya, Torsi
PENGARUH JARAK KERENGGANGAN ELEKTRODA BUSI TERHADAP KONSUMSI BAHAN BAKAR PADA MOTOR BENSIN MEREK TOYOTA 5 K KIJANG Agus Wibowo; Tofik Hidayat; Moh. Yusuf Abadi
Engineering : Jurnal Bidang Teknik Vol 1 No 1 (2010): April
Publisher : Universitas Pancasakti Tegal

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1979.569 KB) | DOI: 10.24905/eng.v1i1.137

Abstract

One part of car producinginq moving power is called as an engine. The type of engine used in most cars is reciprocating piston and. 9 intenal combustion engine can. The internal combustion engine can be divided into (1) gasoline motor, which its mixing process between air and fuer takes place in the carburator and transfried into ttu cylinder. These mixed substsnces are pressed by the reciprocating piston and burned to produce power (2) Diesel motor which only the air is entered into the cyrinder, then, after the air is presed by the reciprocating piston, diesel fuel is injected in the cylinder using fuel injector systern that enables the combustion and the expansion for producing power.Reciprocating piston gasorine motor is one of the basic power plants, which is the widely used today for moving the this reciprocating piston gasoline molor change the het energy energy to mechanical energy which is gained by fuet combustion in that engine. one of the combustion proccsses in that engine is igniting process. This paper discuses about theinfluence of spark plug elektroda gap adjustment. The experimental result conducted on the Toyota Kijang 5K engine show ,that spark plug elektode gap influences spark resulted for igniting fuel and air mixture and the most ideal gap is 0.8 mm which resurlt in the best combustion process. Therefore it can be concluted that this gap resurlt. The most eficient fuel consumption.Keywords: gasoline motor, spark plug electrode , fuel consumption.
PENENTUAN JUMLAH SUHU YANG OPTIMAL KIPAS KONDENSOR TERHADAP LAJU PENDINGINAN PADA AC 1 PK Mustaqim ,; Agus Wibowo; Yasin ,
Engineering : Jurnal Bidang Teknik Vol 1 No 1 (2010): April
Publisher : Universitas Pancasakti Tegal

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (889.254 KB) | DOI: 10.24905/eng.v1i1.138

Abstract

The purpose of this paper is to determine the best blade number on the l PK refrigeration .rate of "Changhong" air conditioner with various number of fan blades apptied.This paper examines the installation of "Changhong" indoor air conditioner with a 1 pK capacity by mixing fan blade number, which are 3, 4, and s blades, measured using the measuring tools, such as thermo-couple, tlrcrmo-laser, pressure gouge and ampere meter. Used as the substitution of a room, a cabin having 1,5 m3 uolumes is used to obtain the steady temperature. After it is siady (the moueients of mrasuring tools and temperature on the permanent room are minimal) the data are collected by each fan usageThe data collected in this papper is annlyzed using the refrigerator characteristics table R-22 to obiain ilu pressure and enthatply values on enclr fan. Entlntpy unrue is used to find out the refrigeration rate characteristics values of each fan.The conducted test to achieue the results of using ile condenser fan with 3 blades are mref = 0,069504 kg/s, Qe, = 13.80602 kW, Qk= 11,75043 Kw, RE = 198,635 kj/kg, COP = 16.51438. The result using the fan with 4 blades are mref = 0,073904 kg/s, Qe = 14.9084 kW, Qk = 12.4525 kW, RE = 201,77 kj/kg, COP = 17,83301. Whereas, for the 5_bladed fan, the results are mref = 0.072425 kg/s, Qe = 14.52415 Kw, Qk = 12.2033 kW, RE = 20,541 kJ/Kg, COP, = 17.37339.From the results of "Changhong" air conditioner with 1 PK capacity analysis, the best result is achieved by using the condenser fan with 4 blade.Keyword : fan blades, R-22, evaporator capacity, condensing Capacity refrigerator effect, COP
OPTIMALISASI PRODUKSI HIDROGEN PADA HYDROGEN REFORMER DENGAN PROSES PEMECAHAN MINYAK JARAK (JATROPHA OIL) Agus Wibowo; Irfan Santosa
Engineering : Jurnal Bidang Teknik Vol 4 No 2 (2013): Oktober
Publisher : Universitas Pancasakti Tegal

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (518.805 KB) | DOI: 10.24905/eng.v4i2.263

Abstract

Tujuan dari penelitian ini yaitu secara jangka panjang mengeksplorasi kemungkinan penyediaan dan pengunaan biofuel dengan target khusus pada minyak jarak (jatropha oil) yang sangat mudah tumbuh di Indonesia.dan pada penelitian terdahulu telah di peroleh hasil bahwa minyak jarak yang dicampur air dapat menghasilkan hydrogen.sehingga pada penelitian ini lebih menekankan pada peningkatan hasil hidrogennya dengan meenggunakan hydrogen reformer. Penelitian dilakukan untuk mencari variasi perbandingan yang menghasikan kapasitas produksi gas paling optimal dengan gas hidrogen yang banyak , enengi yang diperlukan untuk reaksi serta mencari perbandingan yang optimal campuran minyak jarak dan air pada kualitas hasil reaksi yang menghasilkan hidrogen paling optimal. Eksperimen menggunakan variasi perbandingan 1:1, 1:1,5, 1:2 dan 1:3 antara minyak jarak dengan air yang dipanaskan pada suhu rata-rata 700oC pada pemanas 1 dan suhu rata-rata 700oC pada pemanas 2 serta pada katalis dengan suhu rata-rata 300oC. Hasil yang diperoleh yaitu variasi perbandingan 1:1 merupakan campuran yang menghasikan kapasitas produksi gas paling besar yaitu menghasilkan 0,0967 mL/dt dan energi yang diperlukan sebesar 0,0646 KJ tiap detik. Namun untuk kualitas pembakaran hasil gas atau produksi hidrogen terbaik di peroleh pada campuran minyak jarak dan air dengann perbandingan 1:1,5 yang ditunjukan dengan jumlah api hidrogen paling besar. Kata Kunci: Minyak jarak, Hidrogen reformer, Laju reaksi
PENENTUAN AIR FUEL RATIO (AFR) AKTUAL PEMBAKARAN LPG PADA CELAH SEMPIT TIPE HORISONTALAris Yudi Widodo; Lagiyono .; Agus Wibowo
Engineering : Jurnal Bidang Teknik Vol 5 No 1 (2014): April
Publisher : Universitas Pancasakti Tegal

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (567.205 KB) | DOI: 10.24905/eng.v5i1.301

Abstract

Tujuan penelitian adalah untuk mendapatkan perbandingan yang tepat pada bahan bakar LPG dengan udara yang stoikiometri, mengetahui bagaimana Air Fuel Ratio (AFR) Aktual dan, Equivalent Ratio yang terjadi pada campuran kaya bahan bakar LPG dengan udara. Penelitian dititik beratkan pada bagaimana kecepatan pembakaran dengan visual pembakaran pada Air Fuel Ratio (AFR) Aktual yang terjadi pada bahan bakar LPG dengan udara (Campuran kaya). Dalam pengujian ini menggunakan lima variasi perbandingan AFR yaitu pada perbandingan 12:1, 13:1, 14:1, 15:1 dan 16:1 dengan alat uji ruang bakar. Hasil penelitian dapat disimpulkan dengan jarak yang sama yaitu 0,42 m. Pada AFR 12:1 dengan waktu 0,0445 detik menghasilkan kecepatan 9,7804 m/s, AFR 13:1 dengan waktu 0,0389 detik menghasilkan kecepatan 14,6707 m/s, AFR 14:1 dengan waktu 0,0334 detik menghasilkan kecepatan 12,5749 m/s, AFR 15:1 dengan waktu 0,0501 detik menghasilkan kecepatan 10,0599 m/s, dan pada AFR 16:1 dengan waktu 0,0334 detik menghasilkan kecepatan 14,2515 m/s. Dengan AFR stoikiometri 15,6/1 gram bahan bakar/gram udara dan Equivalent Ratio (ɸ) 1,114. Jadi dari hasil yang telah didapat dari pengujian diatas dapat disimpulkan pada AFR 13:1 dan 16:1 menghasilkan kecepatan paling maksimal tetapi pada AFR 13:1 membutuhkan bahan bakar LPG lebih banyak dibanding AFR 16:1, sehingga pada AFR 13:1 boros bahan bakar LPG meskipun dengan kecepatan AFR 16:1 hampir setara. Dengan kata lain pada Air Fuel Ratio (AFR) 16:1 paling efisien dan seimbang antara bahan bakar LPG dengan udara. Kata Kunci: AFR stoikiometri, AFR Aktual dan Equivalen Ratio pembakaran.
Co-Authors A. Farid Ahmad Farid Ahmad Farid Arif Basofi Bangun Muljo Sukojo Budi Johan Budi Santoso Catur Wijayanti Cicik Harfana Cusanto Aji Aji Darmawan Aditama Dian Ratnasari Dio Putera Hasian Dita Aulia Rahma Eko Hadisiswanto Ernani Budi Prihatmi Fandra Nanda Fardani Annisa Damastuti Gunawan . Hadi Pranoto Hadi Wibowo Harry Rahmadi Putra Imam Junaidi Imron Rosadi Ina Kusrini Indah Eko Cahyani Indra Fahrizal Irfan Santosa Irfan Santoso Irma Wulandari Ismi Setianingsih Jauari Akhmad Nur Hasim Jumail Karunia Dianta Khalifah Sholihah Kudang B. Seminar Lagiyono . Lawrence Adi Supriyono M. Agus Shidiq Marsofiyati Marsofiyati Moch. Chafid Moch. Robihul Mufid Moch. Turmudzi Moh. Ade Purwanto Moh. Yusuf Abadi Mohamad Samsudin Mohammad Abousaidi Muhammad Agus Shidiq Mustaqim , Mustaqim . Mustaqim mr Nafisah Nuraini Narto Narto Ninik Umi Hartanti Novita Putri Nur Asiyatul Janah Nurul Atieka Palupi Dyah Ayuni Pratama Ekaluspita Prawiro Anggianto Rika Ampuh Hadiguna Rizki Fajarudin Saniyatul Mawaddah Sri Nuryani Wahyuningrum Sudarinah Sudarinah Suryati Kumorowulan Suswanto . Suyono Suyono Tofik Hidayat Untung Hartoni Viona Galanita Windi Puji Ariani Yasin , Yudi Widodo Yunia Ikiawati Yusra Hadi Zaenal Supriyadi Zulfah .