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All Journal Jurnal Sains Materi Indonesia TELE, Journal of Applied Communication and Information Technologies Aktiva : Jurnal Akuntansi dan Investasi Kinetika Makara Journal of Technology
Abu Hasan
Chemical Engineering Department, State Polytechnic of Sriwijaya, Palembang 30139, Indonesia
Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Economics, Econometrics & Finance Electrical & Electronics Engineering Energy Engineering Materials Science & Nanotechnology Mechanical Engineering

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Implementasi IPDU Dominion PX 1000 Untuk Monitoring Daya Pada Peralatan Cisco Akademik Teknik Elektro Melalui Jaringan Komputer Hasan, Abu; Riyantika, Defi; Prasetyani, Finisia Winna
TELE Vol 13, No 2 (2015)
Publisher : Politeknik Negeri Semarang

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Abstract

Saat ini belum ada alat khusus yang digunakan untuk memonitoring besarnya pemakaian daya listrik secara efektif dan efisien. Monitoring daya dilakukan dengan melihat langsung besarnya daya yang terpakai secara manual. Hal tersebut sangat kurang efektif dan efisien. Oleh karena itu dalam tugas akhir kami, kami mengimplementasikan produk baru dari Raritan yaitu IPDU Dominion PX 1000 yang berfungsi untuk memonitoring total daya listrik melalui jaringan computer. Sistem IPDU Dominion PX 1000 ini memiliki fasilitas SMTP server, sehingga dengan adanya SMTP maka memungkinkan untuk pengiriman email atau pesan informasi secara otomatis ke alamat email client melalui Microsoft Outlock. Sistem IPDU Dominion PX 1000 ini juga dirancang untuk mempermudah client dalam memonitoring daya dan mendistribusikan daya listrik ke peralatan yang dimonitoring. IPDU Dominion PX 1000 dilengkapi dengan port Ethernet sehingga monitoring bisa dilakukan secara jarak jauh secara efektif dan efisien. 
ANALISIS PENERAPAN METODE BIAYA PENYUSUTAN AKTIVA TETAP MENURUT FISKAL UNTUK MENENTUKAN BESARNYA PAJAK TERHUTANG Hasan, Abu
JURNAL AKUNTANSI DAN INVESTASI Vol 1, No 1 (2016): AKTIVA
Publisher : Fakultas Ekonomi, Program Studi Akuntansi

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (421.263 KB) | DOI: 10.35835/aktiva.v1i1.146

Abstract

Rekonsiliasi fiskal dilakukan oleh wajib pajak karena terdapat perbedaan penghitungan khususnya total akumulasi penyusutan aktiva tetap menurut metode fiskal (perpajakan) dan menurut metode komersial (akuntansi). Tujuan dari penelitian  ini adalah (1) Untuk mengetahui total akumulasi penyusutan aktiva tetap yang diperoleh menurut metode fiskal dengan menggunakan metode garis lurus, (2) Untuk mengetahui besarnya pajak terutang yang harus dibayar oleh RSUD Slamet Martodirdjo Kabupaten Pamekasan. Jenis penelitian yang dipergunakan dalam penelitian ini adalah penelitian deskriptif kuantitatif, dan menggunakan data sekunder yang bersumber dari laporan keuangan Rumah Sakit Umum Daerah Slamet Martodirdjo Kabupaten Pamekasan. Kesimpulan pada penelitian ini adalah; Tarif yang dikenakan alat angkut sepeda motor  12,5% menurut ketentuan penyusutan dalam Rumah Sakit Slamet Martodirjo tersebut sebesar 15.000.000,00 sedangkan menurut fiskal tarif  sebesar 25% menurut UU No 36 Tahun 2008 sebesar 22.500.000,00 sehingga menimbulkan perbedaan laba setelah pajak antara rumah sakit dan fiskal, sehingga dalam pembayaran pajaknya rumah sakit lebih kecil dari pada pajak yang dikenakan fiskal. Berdasarkan kebijakan pajak / fiskal ini pengenaan tarifnya lebih besar dibanding rumah sakit sehingga dapat mengurangi perolehan laba rumah sakit slamet martodirjo.
COMPARATION OF RUBBER MILLING PROCESS TO PRODUCE NATURAL RUBBER COUMPOUNDS USING MODIFIED AND UNMODIFIED LOCAL CLAY FILLER Hasan, Abu; Aznury, Martha; Purnamasari, Indah; Zaman, Muhammad; Junaidi, Robert; Rahmaniar, Rahmaniar
Jurnal Sains Materi Indonesia Vol 21, No 2: JANUARY 2020
Publisher : Center for Science & Technology of Advanced Materials - National Nuclear Energy Agency

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (706.906 KB) | DOI: 10.17146/jsmi.2020.21.2.5797

Abstract

COMPARISON OF RUBBER MILLING PROCESS TO PRODUCE NATURAL RUBBER COMPOUNDS USING MODIFIED AND UNMODIFIED LOCAL CLAY FILLER. Many researchers have studied the effect of modified clay as filler on rubber compounds for both natural rubber and synthetic rubber. Various chemicals are used as clay modifiers. In the rubber milling process, modified clay is directly used as filler after pretreatment with clay modifier. However, clay modifiers can also be milled together with original clay during the rubber mastication and milling process. Thus both of these methods certainly produce different physical properties, so the comparison of the two rubber milling processes is the focus of this research. The analysis of the curing characteristics and physical properties of vulcanized natural rubber was carried out with a rheometer and physical properties test units. Thermal analysis was carried out using TG/DTA and dispersion of filler on the rubber compound was analyzed by SEM. The results of the curing characteristic of the rubber compound and the physical properties of vulcanization showed that there was an effect due to the comparison of the rubber milling process. Modified clay using JH-S69 is better than JH-S69 milled with original clay and vice versa occurs in PEG 4000 which is used as clay modifier. PEG 4000 which is milled together with original clay produces curing characteristic and physical properties of vulcanization better than pretreatment of clay to be modified clay. This analysis is in line with the analysis using SEM.
KOMPOSIT DENGAN MATRIK SODIUM SILIKAT DAN PENGISI SENG OKSIDA SEBAGAI THERMAL GREASE UNTUK CENTRAL PROCESSING UNIT (CPU) Hasan, Abu
KINETIKA Vol. 9 No. 2 (2018): KINETIKA 01072018
Publisher : Politeknik Negeri Sriwijaya

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Abstract

Sodium silicate has a higher thermal conductivity and lower viscosity than the basic material for making thermal grease that is widely used today, silicon. On the other hand, ceramic materials such as zinc oxide have many advantages compared to metals as thermal grease fillers which are widely used today. Composites with sodium silicate matrix and zinc oxide fillers were studied as thermal grease for central processing units. This research aims to produce thermal grease for CPU that have better quality than those on the market today. Thermal grease was made by mixing nanosized zinc oxide fillers and sodium silicate matrix with filler concentrations of 16 wt%, 18 wt%, and 20 wt% and tested by application-specific test method. The results of the study show an increase in thermal conductivity to the increase in filler fractions. Thermal grease with 20 wt% fillers produces thermal grease with the highest and most stable thermal conductivity.
SIFAT FISIK VULKANISAT KARET DENGAN BAHAN PENGISI VARIASI TANAH LIAT DI BERBAGAI LAPISAN AREA TAMBANG PT. BUKIT ASAM (PERSERO) TBK. Hasan, Abu; Dewi, Erwana; Purnamasari, Indah; Irawan, Dewanda; A.S, Putu Yoga
KINETIKA Vol. 10 No. 1 (2019): KINETIKA 01032019
Publisher : Politeknik Negeri Sriwijaya

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Abstract

This study aims to study the physical characteristics of vulcanized rubber using various clay fillers from layers in the PT. Bukit Asam (Persero) Tbk .. This research was conducted 6 formulas (1,2,3,4,5,6), each variation of clay type INT A2-B1, OBA1, Lower C, INT A1-A2, INT B2-C, INT B1-B2. Then with the same variation carried out the addition of chemicals in the form of JHS-69 and PEG 4000 in each of the 6 formulas as much as 1 phr. The natural rubber used is RSS-1 then rubber is modified and vulcanized along with other process materials in the open mill. Based on the results of the study it has been analyzed that rubber compound number 4 using JH-S69 is better than other rubber compounds, which have a tensile strength value of 17.2 Mpa, elongation at break of 670%, modulus of 300% 4 Mpa, and tear strength 33 kN / m. Whereas the best rubber compound using PEG 4000 is compound number 2 which has a tensile strength value of 16.6 Mpa, elongation at break of 690%, modulus of 300% 2.4 Mpa, and tear strength 28.8 kN / m. From the results of the analysis of the physical properties, the two compounds meet the SNI 0778:2009 standards to be used as shoe soles products.
PAPAN PARTIKEL AMPAS TEBU (Saccharum officinarum) DENGAN PEREKAT HIGH DENSITY POLYETHYLENE Hasan, Abu; Yerizam, Muhammad; Kusuma, Mutmainnah Ningtyas
KINETIKA Vol. 11 No. 3 (2020): KINETIKA 01112020
Publisher : Politeknik Negeri Sriwijaya

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Abstract

The problem regarding the availability of raw materials for the timber industry encourages research on the use of lignocellulosic materials to develop, one of which is bagasse. The large amount of bagasse and plastic waste that is not utilized as waste in the community makes it possible to carry out further processing into particle board. Plastic waste that can be used as an adhesive in the manufacture of particle boards is high density polyethylene (HDPE) plastic. The method used was Hand lay-up, which was arranging the pattern of bagasse fibers randomly and bidirectional crossed, the ratio of adhesive and bagasse fibers 70:30, compressed by varying the pressing time of 15, 30, 45, 60, 75 minutes 150 0C and a pressure of 100 kgf/cm2. The best results from the manufacture of particle board under 60 minutes of pressing, the bidirectional arrangement pattern has better physical and mechanical properties than the random arrangement pattern. Showed the values of crossed bidirectional fiber moisture content is 4,898%, density 0.64 g/cm3, swelling 8.15% , water absorption 21.71% , MOR 483.11 kgf/cm2 and MOE 1740.95 kgf/cm2.
MEKANISME ADSORBEN ZEOLIT DAN MANGANESE ZEOLIT TERHADAP LOGAM BESI (Fe) Hasan, Abu; Yerizam, Muhammad; Yahya, Muhammad Habib
KINETIKA Vol. 12 No. 1 (2021): KINETIKA 01032021
Publisher : Politeknik Negeri Sriwijaya

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Abstract

Iron (Fe) is an essential metal whose presence in certain amounts is needed by living organisms, but in excess amounts it can cause toxic effects. This study aims to determine the effect of optimum contact time and optimum mass variation on Fe metal reduction using zeolite and manganese zeolite adsorbents. In addition, isotherm studies and adsorption kinetics were carried out. The variations in contact time used in this study were 0, 15, 30, 45, and 60 minutes. Meanwhile, the adsorbent mass variations used were 1 and 1.5 grams. From the results of this study it is known that the optimum time for the adsorption of Fe metal is 60 minutes with an adsorbent mass of 1.5 grams, a decrease in concentration of 51.1394% for manganese zeolite adsorbent and 47.6074% for zeolite adsorbent. . The iron ion adsorption process using zeolite and manganese zeolite follows the Freundlich adsorption equation model. The adsorption rates of zeolite on ferrous metals for masses of 1 gram and 1.5 grams tend to follow the second order pseudo kinetics model.
The Effect of Rubber Mixing Process on The Curing Characteristics of Natural Rubber Hasan, Abu; Rochmadi, Rochmadi; Sulistyo, Hary; Honggokusumo, Suharto
Makara Journal of Technology Vol. 16, No. 2
Publisher : UI Scholars Hub

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Abstract

This research is aimed at studying the relationship between rubber mixing processes and curing characteristics of natural rubber. The curing characteristic analysis was carried out through a natural rubber formula having been masticated and mixed, followed by curing. As many as four mastication methods were finely applied; each respected four sequences of rubber mixing process. In the first method, rubber was masticated for 5 minutes and then rubber chemicals and carbon black N 330 were simultaneously added. In the second and the third methods, rubber was masticated for 1 minute and then carbon blacks and rubber chemicals were also simultaneously added but using different type of fillers. In the fourth method, rubber was masticated for 3 minutes and then rubber chemicals and carbon black were subsequently added. The additions of rubber chemicals and carbon blacks to the masticated rubber were distinguished by the sequence and time allocated for each mixing process. The carbon blacks were added in two stages by which 10 phr was added first and the remaining 40 phr was added later along with oil. In another method, ratios of the carbon blacks addition (as done in the first and the second stages) were 20:30, 30:20, and 40:10. The examination results showed that rubber mixing process gave an impact on the changes of curing characteristics. They were much affected by the method of carbon black addition. The mixing temperature also had an effect on both curing time and curing rate in which the higher the mixing temperature, the lower the curing time and curing rate. Vulcanization temperature also affected the curing time and curing rate in which the higher the vulcanization temperature, the lower the curing time and the higher the curing rate. Lastly, particle size of carbon black also gave an impact on the curing time and curing rate in which the smaller the particle size, the lower the curing time and the higher the curing rate.
Co-Authors A.S, Putu Yoga Defi Riyantika, Defi Erwana Dewi Finisia Winna Prasetyani, Finisia Winna Hary Sulistyo Indah Purnamasari Irawan, Dewanda Kusuma, Mutmainnah Ningtyas Martha Aznury Muhammad Yerizam Rahmaniar Rahmaniar, Rahmaniar Robert Junaidi Rochmadi Rochmadi Suharto Honggokusumo Yahya, Muhammad Habib Zaman, Muhammad