Garuda - Garba Rujukan Digital

p-Index From 2021 - 2026

4.408

P-Index

This Author published in this journals

All Journal Dinamika Hukum Sinergi ROTOR: JURNAL ILMIAH TEKNIK MESIN Indonesian Journal of Science and Technology R.E.M (Rekyasa Energi Manufaktur) Jurnal Journal of Mechanical Engineering Science and Technology Jurnal Ilmiah Kebijakan Hukum Animal Production : Indonesian Journal of Animal Production JEPA (Jurnal Ekonomi Pertanian dan Agribisnis) SELAPARANG: Jurnal Pengabdian Masyarakat Berkemajuan STATOR: Jurnal Ilmiah Mahasiswa Teknik Mesin Agrisocionomics: Jurnal Sosial Ekonomi Pertanian Ta`Limuna : Jurnal Pendidikan Islam ComTech: Computer, Mathematics and Engineering Applications Jurnal Ilmiah Fillia Cendekia Revitalisasi : Jurnal Ilmu Manajemen INTEGRITAS : Jurnal Pengabdian Manajemen Agribisnis: Jurnal Agribisnis Jurnal Abdi Insani Jurnal Dinamika Sosial Ekonomi Otonomi Jurnal Ilmiah Pendidikan Visioner (JIPV) CITIZEN: Jurnal Ilmiah Mulitidisiplin Indonesia JURNAL PERMADI: PERANCANGAN, MANUFAKTUR, MATERIAL DAN ENERGI Jurnal Manajemen Pesisir dan Laut Jurnal Polimesin Indonesian Journal of Maritime Technology or abbreviated (ISMATECH) INTERACTION: Jurnal Pendidikan Bahasa

Sumarji

Universitas Jember

Author-ID : 391995

Religion Agriculture, Biological Sciences & Forestry Humanities Automotive Engineering Biochemistry, Genetics & Molecular Biology Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Health Professions Immunology & microbiology Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mathematics Mechanical Engineering Medicine & Pharmacology Nursing Physics Public Health Social Sciences Transportation Veterinary Other

Published : 61 Documents Claim Missing Document

Claim Missing Document

Articles

1 2 3 4 5

The Influence of Socio-Economic Factors on The Productivity of Farmers in The Business of Layers in Blitar Regency Lutfi, Dwiki Alfikriyadi; Sumarji, Sumarji; Daroni, Ahsin
ANIMAL PRODUCTION Vol. 22 No. 1 (2020)
Publisher : Faculty of Animal Science, Jenderal Soedirman University in associate with Animal Scientist Society of Indonesia (ISPI)

Blitar District is one of the areas that has potential in developing laying hens. However, laying hens in Blitar are still traditionally carried out and have not paid attention to aspects of effectiveness and efficiency economically. The purpose of the study was to find out the profile of farmer , test the level of farmer productivity and examine the effect of socio-economic factors (the age of farmer, education level, length of livestock raising and number of livestock) on labor productivity in laying hens in Blitar District. The study used a survey method with a sample of 22 sub-districts in Blitar District. The determination of the number of sub-districts was chosen using the purposive sampling method, so that 6 sub-districts were selected. Respondents were selected by the quota sampling method of 10 farmer in each selected region. Data collected were analyzed descriptively and statistically. To find out the social influence on productivity, classical assumption was tested and multiple linear regression tests. Based on the results of the study, the profile of laying hens in Blitar District carried out traditional farming systems with livestock ownership including high categories that had heterogeneous socio-economic status. Furthermore, labor productivity of laying hens in Blitar District is quite effective and efficient, because the value is greater than the minimum wage (UMR) of Blitar District. Age of farmers, education of farmers, and number of livestock have a significant influence on the productivity of laying hens farmers in Blitar District.

ANALISIS SIFAT MEKANIK HASIL PENGELASAN ALUMINIUM AA 1100 DENGAN METODE FRICTION STIR WELDING (FSW) Mahros Darsin; Sumarji Sumarji; Angger Sudrajat
ROTOR Vol 5 No 1 (2012)
Publisher : Jurusan Teknik Mesin Fakultas Teknik Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (603.174 KB)

Aluminum and aluminum alloys have properties that are less well when coMPared to steel, such as specific heat and has a high conductivity. They are also easily oxidized and form an aluminum oxide Al2O3 which have a high melting point. Consequently, when they are welded the fusion between base and weld metal will be blocked. Moreover, if the cooling process is too fast it will form a smooth cavity ex-pouch of hydrogen. Friction stir welding (FSW) is a challenging alternative for joining aluminum alloy. In FSW, process occur in the solid state (solid state joining). In this research, some attempts were carried out to find the best quality of welding, in term of mechanical properties and microstructure. Tool rotation speed was varied at 780, 980, 1120 rpm. Whereas, feed rate used was keep constantly at 15 mm/min. The material to be welded is a- 4.0 mm thick aluminum AA 1100 strips. Result showed that the highest strength obtained is 56.528 MPa at 1120 rpm and the lowest strength obtained is 38.472 MPa at 980 rpm. Wormholes and the lack of penetration defects are the main things that reduce the tensile strength. From micro observations known on the grains shape of the stir zone, FeAl3 particles is spread more evenly in matrix of Al due to the stir process during the welding process. Hardness tests showed that the weld metal is softer than the base metal. Keywords: Aluminum, welding, FSW

Pengaruh Variasi Fraksi Volume Filler Terhadap Kekuatan Mekanik Komposit Sandwich Polyester Serat Kenaf Core Styrofoam Aman Sentosa; Sumarji Sumarji; Dwi Djumhariyanto
ROTOR Vol 8 No 2 (2015)
Publisher : Jurusan Teknik Mesin Fakultas Teknik Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (349.781 KB)

Composite sandwich reinforcement kenaf fiber polyester with Styrofoam core is an alternative material that has the potential to be developed as an application in various fields with an excess of nature that is strong, lightweight, rigid, able to withstand bending loads, impact, vibration damping and sound. This study is intended to overcome the problems of fishermen Muncar - Banyuwangi in the selection of materials manufacture of safe fish robust and insulated to preserve or maintain the freshness of the fish catch of fishermen low temperature. This study was conducted to determine the effect of variations in fiber volume fraction of the increase in impact strength and bending composite materials sandwich.Untuk get impact strength values using the tool impact test with a maximum capacity of 300 joules specifications, pendulum mass of 20.9 kg, 0.83 m long pendulum arm, while to obtain bending strength values using a universal testing machine capacity of 300 KN. Variations were used in this study is the percentage of fiber volume fraction of 10% fiber, 20%, 30%, and 40%. The results showed that the variation of fiber volume fraction of 40% had values higher impact strength and bending of 0.30 Joules / mm² and 5,65MPa than the fiber volume fraction of 10% has impact and bending strength values were lower at 0.14 joules / mm2 and 0.30 MPa. So in this study limits the variation of fiber volume fraction of 10% to 40% proved that if the greater the percentage of fiber volume fraction value will increase the value of impact strength and bending in composite sandwich. Keywords: fiber volume fraction, impact strength and bending, composite sandwich

STUDI PERBANDINGAN KETAHANAN KOROSI STAINLESS STEEL TIPE SS 304 DAN SS 201 MENGGUNAKAN METODE U-BEND TEST SECARA SIKLIK DENGAN VARIASI SUHU DAN PH Sumarji Sumarji
ROTOR Vol 4 No 1 (2011)
Publisher : Jurusan Teknik Mesin Fakultas Teknik Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (223.048 KB)

There are many failures in a structure that is caused by the damage of the metal that support them. One of the problem which can cause the damage of the metal is corrosion. With its action, corrosion can make a metal become thin, and in some cases can make a crack and fracture. Some factors are determine how fast the process is occured in corrosion process, for examples are the oxygen concentration, degree of acidity, and temperature. The purpose of this research is to know how is the role of that factors in corrrosion process. This research is implemented in three condision of temperatures (300 C, 500 C, 700 C), variation of HCl’s pH (0, 1, 2), and cycle environments condition. That will be combined and will be tested for about 7 days. After this execution, material will be measured for the decrease of the weight to give the value of corrosion rate. From this experiment, the rate of corrosion rises by increasing temperature and the decreasing pH condition. In all condition of this experiment, the SS 304 Stainless Steel has the better resistant to the corrosion in HCl environment. The highest corrosion rate of cycle condition is 36.119,4 mpy for SS 201 Stainless Steel, and 515,5 mpy for SS 304 Stainless Steel. Form the micro photographs of corrosion happened on SS 201 Stainless Steel is pitting corrosion and SS 304 Stainless Steel is uniform corrosion. Keywords: Stainless Steel, Cycle and Corrosion

KOMPARASI EFISIENSI MATERIAL BAJA KARBON St 37, BAJA KARBON St 41 DAN BAJA KARBON St 60 TERHADAP LAJU KOROSI DI MEDIA AIR MUARA SUNGAI (PAYAU) DENGAN METODE ELEKTROKIMIA Yusuf Nur Afandi; Sumarji Sumarji
ROTOR Vol 6 No 2 (2013)
Publisher : Jurusan Teknik Mesin Fakultas Teknik Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2060.308 KB)

Mouth of the river is the meeting place of river water and sea water . water estuaries (brackish water) has asodium chloride content of between 1% -2.5 whether it's from natural sources around the surrounding river water or a mixture of sea water . many construction or structure that is attached to the mouth of the river environment made of metal materials, especially carbon steel. the use of steel in building structures in estuaries susceptible to corrosion due to environmental water containing chemical elements that are corrosive. Factors affecting corrosion such as temperature, acidity (pH), salinity (NaCl), the levels of chloride (Cl), the levels of sulfate (SO) as well as dissolved oxygen, causing easily corroded carbon steel. This study aims to determine the Comparative Efficiency of Steel St 37, St 41 Steel and Steel st 60 on the rate of corrosion in aqueous media estuaries with tool Potensiostat methods. This research is an experimental laboratory to design the post-test group design. From the results obtained data show the results of corrosion rate measurements made in this study that the greatest rate of corrosion occurring on the steel material St 37 is 29.527 mpy, St 41 steel was 27.548 mpy, and steel St 60 is 24,493 mpy. The results showed that the corrosion rate of steel st 37 has a very large corrosion rate in comparison steel and carbon steel st 41 high st 60. From the observation in micro on the trid specimen three is corrosion that resembles a uniform or evenly corrosion. A form of corrosion that results in a uniform attack on the entire surface of the metal. Keywords: Estuaries, The Rate of Corrosion

ANALISIS KETAHANAN KOROSI PIPA A53 PADA LINGUNGAN OIL SLUDGE DENGAN METODE C-RING Rony Agista Apriansyah; Sumarji Sumarji; Gaguk Jatisukamto
ROTOR Vol 10 No 1 (2017)
Publisher : Jurusan Teknik Mesin Fakultas Teknik Universitas Jember

Corrosion is the degradation of the material surface due to reaction with the environment. Steel pipe is one of the materials vulnerable to corrosion because the piping system is always in contact with the outside environment. This research have a purpose to know influence of cold working about corrosion resistance pipe A53 on oil sludge salt water and oil sludge pond environment with c-ring method. Oil sludge is sediment of crude oil thats contain water, sediment, and oil thats can be processed again. The cold working process is carried out by providing bending loads of 114 kg, 140 kg, and 160 kg, and one material without bending. Process of corrosion testing uses weight loss method by weighing the material before it is corroded and after corrosion. Result of test showed that there was an increase of hardness on the material with bending load of 114 kg, 140 kg, and 160 kg respectively of 103.33 BHN, 134.00 BHN, and 187.66 BHN, while the material without bending had a hardness of 93.33 BHN. Corrosion rate on material without bending with oil sludge salt water is 2,12 x 10-2 mmpy while in oil sludge pond equal to 1,67 x 10-2 mmpy. Materials with bending loads of 114 kg, 140 kg, and 160 kg have a corrosion rate of 2.35 x 10-2 mmpy, 2.88 x 10- 2 mmpy, and 4.18 x 10-2 mmpy on oil sludge salt water, and 1.19 x10-2 mmpy, 2.15 x 10-2 mmpy, and 3.09 x 10-2 mmpy on oil sludge pond. Oil sludge of salt water is more reactive than oil sludge pond because it contains sea water composed of NaCl compounds which is a corrosive environment .The given bending load results in strain hardening followed by increased energy on the material so that the corrosion rate increases. Cold treatment provided resulted in cracks on the surface of the material so that the corrosion was localized to the crack and formed pitting. Keywords : A53, Oil Sludge, Strain Hardening, Weight Loss

PENGARUH BASIC SEDIMENT AND WATER TERHADAP LAJU KOROSI PIPA X52 DAN A53 PADA MEDIA OIL SLUDGE. Naufan Arviansyah; Sumarji Sumarji; Digdo Listyadi Setyawan
ROTOR Vol 10 No 1 (2017)
Publisher : Jurusan Teknik Mesin Fakultas Teknik Universitas Jember

This research have a purpuse to know corrosion rate in pipe X52 and A53 at oil sludge media caused BS and W. Corrosion is a damage of metal that occurs because reaction between metal with environtment and produce unwanted of corrosion product. Pipe X52 and A53 is a type of low carbon steel that use for fluid transportation system in industry. Oil sludge is a sediment of crude oil from main gathering storage and containing variouses elements. Oil sludge have a one of element is Basic Sediment and Water that is can make corrosion happen to distribution pipes. Measuring Method used in this research is weight loss method. The result of corrosion rate in Oil Sludge media containing 30,17% BS and W for pipe A53 is 1,64 x 10-2 mmpy and the result for pipa X52 is 2,47 x 10-2 mmpy. The result of corrosion rate in Oil Sludge media containing 60,67% BS and W for pipe A53 is 2,12 x 10-2 mmpy and for pipe X52 the result is 3,13 x 10-2 mmpy. The result of this research showed pipe A53 have more resistance than pipe X52. The corrosion is classified as uniform corrosion. Keywords : A53, Weight Loss, Oil Sludge, X52.

PENGARUH KONSENTRASI EKSTRAK KULIT BUAH MAJA TERHADAP LAJU KOROSI BAJA KARBON A53 DENGAN MEDIA AIR LAUT Iwan Faisal Hidayat; Sumarji Sumarji
ROTOR Vol 9 No 1 (2016)
Publisher : Jurusan Teknik Mesin Fakultas Teknik Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (135.076 KB)

Corrosion is damage or degradation of the metal due to a redox reaction between a metal with a variety of substances in the environment that produce compounds that are not desired. Corrosion is a chemical phenomenon that occurs on metallic materials in a wide range of environmental conditions. Research on the use of tannin as a reaction inhibitor of steel corrosion in a salt solution has been carried out. One of the natural substances containing the compound tannin is maja fruit. Many contain tannins in the skin maja fruit can be used to inhibit the corrosion reaction baja. This study aims to determine the effect of the corrosion rate in carbon steel A53 in a solution of sea water with a variety of fruit skin extracts maja. Variabel used are varied concentration maja fruit skin extracts with a percentage of 0%, 0.1%, 0.2%, 0.3%, and 0 , 4%. While the parameters measured were weight loss. Corrosion rate of carbon steel A53 average at concentrations of 0% is 1.7041 mdd, 0.1% is 0.4674 mdd, 0.2% is 0.4488 mdd, 0.3% is 0.3921 mdd, and 0.4% is 0.3356 mdd. The average efficiency inhibitor maja fruit skin extracts after soaking for 45 days was 75.88% and the most effective immersion occurs on a day to 35 days amounted to 76.12%.

ANALISIS SIFAT MEKANIK KOMPOSIT LAMINA BERPENGUAT SERAT KACA WOVEN DENGAN MATRIKS UNSATURATED POLYESTER 2504 APT Naafi' ul Amri; Gaguk Jatisukamto; Sumarji Sumarji
ROTOR Vol 12 No 1 (2019)
Publisher : Jurusan Teknik Mesin Fakultas Teknik Universitas Jember

Polymer composites has anisotropic properties, if it receives stress from outside it will increase deformation in all directions. This study aims to determine the effect of composites lamina made from woven glass fibers on 2504 APT unsaturated polyester on tensile and flexural strength. The research methodology used is as follows: the process of making composites using the Hand-Lay Up method, the matrix volume fraction Vfm = 69, 39%, the fiber volume fraction Vfs = 30, 38%. The research parameters observed are the x-direction stress (sx) and the y-axis direction strees, (sy). The results obtained are the y-axis, (sy) = 0.8% greater than the x-axis. The flexural strength of the x-axis direction, (sbx) = 57,7% greater than the y-axis direction. The difference in the value of the tensile strength occurs in the number of different fiber bonds, while the flexural strength of the y direction occurs in the fiber lamina which increases more.

ANALISIS KEKERASAN, CACAT LAS, DAN STRUKTUR MIKRO PADA SAMBUNGAN T PADUAN ALUMINIUM 6061 T6511 HASIL GAS METAL ARC WELDING (GMAW) DENGAN VARIASI KUAT ARUS Ahmad Jukliv Pandu Yoedhawan; Sumarji Sumarji
ROTOR Vol 7 No 2 (2014)
Publisher : Jurusan Teknik Mesin Fakultas Teknik Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (349.895 KB)

AA 6061 T6511 is an aluminum alloy with composition Al 96,61 Wt %, Cr 0,04 Wt %, Cu 0,15 Wt %, Fe 0,7 Wt %, Mg 1,15 Wt %, Mn 0,15 Wt %, Si 0,8 Wt %, Ti 0,15 Wt %, and Zn 0,25 Wt %. Gas Metal Arc Welding (GMAW) is a welding process that the energy obtained from an electric arc. Arc welding to occur between the surface of the workpiece with the electrode wire coming out of the nozzle together with the protective gas. GMAW AA 6061 T6511 using filler metal ER 5356 with composition of 0,2% Mn, 0,25% Si, 0,4% Fe, 5,5% Mg, 0,2% Cr, 0,1% Cu, 0,2% Ti, 0,1% Zn, and 0,0003% Be. From a visual test known GMAW process with strong currents 120 amperes generates heat input of 0,504 kJ/mm, GMAW process with strong currents of 150 amperes generates heat input of 0,837 kJ/mm, and the GMAW process with strong currents of 180 amperes generates heat input of 1,168 kJ/mm. From inspection of defects on the surface was found that the results of GMAW are undersize weld, excessive convexity, excessive undercut, overlap, and incomplete fusion. From inspection of surface defects in GMAW welding of AA 6061 T6511 are spherical porosity and wormholes porosity. The area has the highest hardness in the heat affected zone is located at GMAW AA 6061 T6511 180 amperes is equal to 51,33 BHN, the lowest hardness of 24 BHN which is located on the base metal area on GMAW AA 6061 T6511 120 amperes, and microstructure observations show an increase in diameter the highest point on the AA 6061 T6511 from 61 μm after GMAW process 180 amperes becomes 21 μm. Keywords: AA 6061 T6511, Gas Metal Arc Welding, hardness, microstructure, weld defects.

Co-Authors Abu Talkah Adi Purnomo Adi Purnomo Ahmad Jukliv Pandu Yoedhawan Ahmad Jukliv Pandu Yoedhawan, Ahmad Jukliv Pandu Ahmad Syuhri Ales, Steve Korakan Aman Sentosa Aman Sentosa, Aman Amirur Ridho Muhammad Andi Sanata Angger Sudrajat Angger Sudrajat, Angger Ardiansah, Nugroho Jarot Dwi Aris Zainul Muttaqin Arisyahidin, Arisyahidin Aulia, Kunti Rachma Chamim Rosyidin Danang Yudistiro Dani Hari Tunggal Prasetiyo Danny Febriansyah Daroini, Ahsin Daroni, Ahsin Dedi Dwi Laksana Dedi Dwi Laksana Dedi Dwilaksana Digdo Listyadi, Digdo Dwi Djumhariyanto Dwi Suryanningdyah Heni Untari Esti Widasih Gaguk Jatisukamto Gumira, Seno Wibowo Haidzar Nurdiansyah Hari Arbiantara Hari Arbiantara Basuki Hary Sutjahjono Heni Untari, Dwi Suryanningdyah Imam Sholahuddin Intan Hardiatama Istiyowati, Nuning Iwan Faisal Hidayat Karina, Asa khoirul fahmi aziz Lutfi, Dwiki Alfikriyadi M Asrofi Mahros Darsin Masfeya Eka Hermiansyah Masruri Wardhana Mega Hastuti, Sri Wahyuni Melany Pilatusalim Mochamad Asrofi Mochamad Edoward Ramadhan Muhammad Abduh Muhammad Trifiananto Mulyani, Novilia Mulyaningtyas, Ratna Dewi Mustofa, M. Rowi Naafi' ul Amri Nasrul Ilminnafik Naufal Fardio Albajili Naufan Arviansyah Ningsih, Dwi Aminawati Nopitasari, Dewi Nova Monica Aulia Safitri Novel Bagas Satrio Wibowo Nurteteng, Nurteteng Nurul Huda Oktaviyanti, Milla Pratama Yuli Arianto Prayogo Alim Pangestu Puanggo Ganjar Widityo Puranggo Ganjar Widityo Rahma Rei Sakura Rahmatullah Rahmatullah Raihaan, Raihaan Rama Wira Drana Wasistha Ramadhan, Ivan Fadilla Ramli Firdaus Kusnadi Ratna Dewi Mulyaningtiyas Ratna Dewi Mulyaningtiyas Ratna Dewi Mulyaningtiyas Ridha, Fabrobi Rizka Febby Rofi'ah Rizki, Muhammad Khoirur Robertoes Koekoeh KW Robertus Sidartawan Rony Agista Apriansyah Rudianto Rudianto Rusandy, Deby Santyo Saefuddin, Yusuf Saifurridzal, Saifurridzal Salahuddin Junus Setyani, Adika Desi Silvia Andress Andress Suci, Ririn Kurnia Suparno Suparno Supriyono Supriyono Susanti, Rizqa Putri Suwasono, Edi Syahriza, Mochamad Rifki W.C.S, I Made Ivan Wazirotus Sakinah Wibowo, Robertoes Koekoeh Koentjoro Widityo, R. Puranggo Ganjar Widityo Yanuar Alditya Nugraha Yasim, Ahmad Yulio, Agit Yoga Yusuf Nur Afandi Yusuf Nur Afandi, Yusuf Zainul Arifin

Title

Found 61 Documents
Search

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Title Search

Found 61 Documents Search

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Title

Found 61 Documents
Search