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All Journal International Journal of Electrical and Computer Engineering (IJECE) International Journal of Power Electronics and Drive Systems (IJPEDS) Jurnal Akuntansi & Auditing Indonesia Jurnal ILMU DASAR Jurnal Terubuk Jurnal Agrista Jurnal Rekayasa Elektrika Jurnal Ilmiah Universitas Bakrie Jurnal Dinamis SAINSMAT JURNAL R & B Jurnal Ilmiah Poli Rekayasa Jurnal Ilmu Perpustakaan BERKALA SAINSTEK Jurnal JSIKA Corak : Jurnal Seni Kriya PREDIKSI Jurnal Online Mahasiswa (JOM) Bidang Ilmu Ekonomi Jurnal Online Mahasiswa (JOM) Bidang Keguruan dan Ilmu Pendidikan Indonesian Journal of Urology Jurnal Kesehatan Masyarakat Nasional JURNAL PETERNAKAN Jurnal Kultur Demokrasi The Journal of Pure and Applied Chemistry Research Englisia Journal Alchemy Jurnal Penelitian Kimia JURNAL KOLABORASI JOURNAL OF INFORMATICS AND COMPUTER SCIENCE Benefit Jurnal Sains dan Teknologi Pangan The International Journal of Tropical Veterinary and Biomedical Research Jurnal Al-Khitabah Jurnal Ilmiah Mahasiswa Pertanian Unsyiah Jurnal Ilmiah Mahasiswa Pendidikan Jasmani, Kesehatan dan Rekreasi Riset Akuntansi dan Keuangan Indonesia KAREBA : Jurnal Ilmu Komunikasi The Journal of Educational Development Ilmu Pendidikan: Jurnal Kajian Teori dan Praktik Kependidikan Tren Terbaru Dalam Penelitian dan Penelitian Bidang Olahraga Jurnal Akuntansi dan Pembangunan (JAKTABANGUN) Sanitasi: Jurnal Kesehatan Lingkungan Acta Aquatica: Aquatic Sciences Journal JURNAL ILMIAH GEOMATIKA JURNAL KONSELING GUSJIGANG Eralingua : Jurnal Pendidikan Bahasa Asing dan Sastra JET (Journal of Electrical Technology) Jurnal Ekonomi dan Bisnis RELE: Rekayasa Elektrikal dan Energi Jurnal Teknik Elektro Indonesian Journal of Chemistry Dinamika Maritim International Journal of Research in Counseling and Education Jurnal Ilmiah Mahasiswa Kedokteran Biomedis Jurnal Kolaboratif Sains Jurnal Serambi Engineering Ekonis: Jurnal Ekonomi dan Bisnis Agroplantae: Jurnal Ilmiah Budidaya dan Pengelolaan Tanaman Perkebunan Serambi Saintia : Jurnal Sains dan Aplikasi Jurnal Sains dan Teknologi Reaksi Indonesian Journal of Clinical Pathology and Medical Laboratory (IJCPML) Prosiding Seminar Nasional Teknik Mesin
Articles

Pengaruh Perlakuan Panas Terhadap Sifat Mekanik Logam Bukan Besi (Kuningan) Sahat, Sahat; Junaidi, Junaidi; Zulfikar, Zulfikar
JURNAL R & B Vol 2, No 1 (2002)
Publisher : JURNAL R & B

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Abstract

The title of research is : the effect of heat threatment  on characteristics of non ferous metal (bronze), in polytehnic state of andalas university by Sahat S.T.  in designing/constructing field, we must be able to construct significant characteristics of metal. It is due to demand of contruction it self, as well as the restriction of materials which are available in the market where the contruction takes places. The research aims not only to increase writer’s competence in research, but also to prove theoritical truth which can be founf in several references. Beside that, it can be utilized to improve institutional progress where the research is being conducted. The research  is conducted throught a certain method namely qualitative method. There are five sampling threatment that are conducted. The result of heat threatment will be testified/analyced with tortion and harness testing process. The final finding of this research proves the truth of theoritical statement. It is suggested that the further research should be conducted by using time variables /variant in heat threatment process.
Pengaruh Pressureless Sintering Terhadap Sifat Fisis dan Mekanis Komposit Aluminium / Fly Ash Zulfikar, Zulfikar
POLI REKAYASA Vol 2, No 2 (2007)
Publisher : POLI REKAYASA

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Composite materials made from aluminum powder as matrix and fly ash as reinforcement are known as Al-MMCs. They can be produced with powder metallurgy technique. This research is aim to study physical and mechanical properties of aluminum/fly ash composite because of the pressureless sintering effect. The aluminum powder was obtained from Merck Germany that has irregular shape and fine particle size. The fly ash was collected from PLTU Suralaya and it has spherical shape with particle size of <53μm. Fly ash powder was calcined in temperature of 800oC for 3 hours to eliminate compounds that are evaporable in sintering process. Various weight fractions of fly ash as reinforcement are 7.5%, 5%, 2.5% and 0%. Each composition of aluminum powder and fly ash was mixed for 5 hours, then they were uniaxially pre-compacted to produce greenbody of cylinder specimens and rectangular cross-section bar specimens using a pressure of 100 MPa. The green compacts were further compacted with cold isostatic pressing using media of lubricating oil with a pressure of 100 MPa. Then the specimens were pressureless sintered with various temperatures of 500oC, 525oC, 550oC, and 575oC in argon environment for 1 hour. The sintered specimens were tested include bending strenght (σMOR), Vickers hardness (Hv), wear resistance (Wa) and density ( ρ). The results of the research indicate that the optimum mechanical properties are obtained in specimens containing 5% weight fly ash sintered at temperature of 550oC. The optimum properties of bending strength, Vickers hardness, wear resistance and density are 73.03 MPa, 40.5 kg/mm2, 0.0021 mm3/Nm and 2.504 gram/cm3 respectively.
Pengaruh Penambahan Mangan Terhadap Sifat Mekanik Paduan Aluminium A7075 Adril, Elvis; Zulfikar, Zulfikar; Mulyadi, Sri; Firmawati, Nini
POLI REKAYASA Vol 6, No 1 (2010)
Publisher : POLI REKAYASA

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The research about Mn element which is added into alloy A7075 (0,5%Wt; 1,0%Wt; 1,5%Wt and 2,0%Wt) already done. The tests are conducted including hardness test, tensile test and micro structural test. It can be indicated that the change hardness, tensile and micro structural effect Mn. The optimum Mn content are 1,0%Wt by hardness number 196,43 kg/mm2, but by effect Mn can be decrease of tensile number aluminium alloy A7075.
ANALISA EKSPERIMENTAL MODULUS ELASTISITAS BAHAN KOMPOSIT GLASS FIBER REINFORCED PLASTIC (GFRP) BERDASARKAN VARIASI DIAMETER SERAT AKIBAT BEBAN IMPAK LAJU REGANGAN TINGGI Zulfikar, Zulfikar
Jurnal Dinamis No 7 (2010)
Publisher : Jurnal Dinamis

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Abstract

AbstractGFRP composite is one of the alternative materials that the most common as a replacement for metal. This material has a light weight, easy to shape, good strength, and the production cost is relatively cheaper. This study aims to investigate the effects of fiber diameter variation of mechanical behavior, particularly on the load of high strain rate impact. The application of impulse momentum theory in the elastic region is the basic science for this case. The AGC apparatus is equipment that used for this test because it could generate the high strain wave rate in the single direction loading. Specimen is placed in the position of tight end against the end of the input bar. The results showed that the increase in fiber diameter variations affect the value of E that is produced. Thus, it is become a recommendation for the use of this material in certain circumstances.Keywords: GFRP Composite, Elasticity Modulus, High Strain Rate Impact
Kompatibilitas Spodoptera litura Nuclear Polyhedrosis Virus (SLNPV) dengan Ekstrak Gadung Racun (Dioscorea hispida Denst) Terhadap Mortalitas Larva Spodoptera litura Fab. Hasnah, Hasnah; Susanna, Susanna; Zulfikar, Zulfikar
Jurnal Agrista Vol 12, No 1 (2008): Volume 12 Nomor 1 April 2008
Publisher : Fakultas Pertanian, Universitas Syiah Kuala

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Abstract

Compatibility of Spodoptera Litura Nuclear Polyhedrosis ViruS (SlNPV) With Tropical Yam (Dioscorea hispida Denst) Ekstract on Larvae Mortality Spodoptera litura Fab.ABSTRACT. Spodoptera litura is a polyphagus and primery pest on many plants. This insect can be infected by nuclear polyhedrosis virus (NPV) and tropical yam was knowingly capable of controlling the insect. The research was aimed at finding an effective concentration of combination of SlNPV and tropical yam extract on mortality of S. litura larva. The research was conducted in Plant Pest Laboratory of Plant Pest and Disease Departemen, Agriculture Faculty, Syiah Kuala University. The experiment applied a completely randomized design (CRD), consisting of six treatments and four replications. The treatment were in SlNPV concentrations of 0, 3x105, 3x106, 3x107, 3x108, and 3x109 polyhedra inclusion body/ml respectively, combined with poisonous for gadung extract in concentration of 120 ml L-1. Data were analyzed by analysis of variance and followed by Duncan Multiple Range Test (DMRT) at level of 0,05. The result showed that application of combination of SlNPV and tropical yam extract was effective and compatible in controlling S. litura. In general, mortality of S. litura was significantly different than control. Mortality of S. litura at all treatments of concentration except S1 and S0 were 100 per cent at 9,8,8, and 7 day after application (DAA). Average of the fastest larvae mortality was 5,46 days given by 3x109 polyhedra inclusion body ml L-1 and the longest was 7,38 days given by control. Treatments of combination of SlNPV and tropical yam extract at concentration of 3x107, 3x108, and 3x109 was compatible and effective in controlling S. litura larvae with mortality level of 85,95, and 100 per cent at 7 DAA, respectively.
FPGA Implementations of Uniform Random Number based on Residue Method Zulfikar, Zulfikar
Jurnal Rekayasa Elektrika Vol 11, No 1 (2014)
Publisher : Universitas Syiah Kuala

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Abstract

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An Improved Design of Linear Congruential Generator based on Wordlengths Reduction Technique into FPGA Walidainy, Hubbul; Zulfikar, Zulfikar
International Journal of Electrical and Computer Engineering (IJECE) Vol 5, No 1: February 2015
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (252.781 KB) | DOI: 10.11591/ijece.v5i1.pp55-63

Abstract

This paper exposes an improved design of linear congruential generator (LCG) based on wordlengths reduction technique into FPGA. The circuit is derived from LCG algorithm proposed by Lehmer and the previous design. The wordlengths reduction technique has been developed more in order to simplify further circuit. The proposed design based on the fact that in applications only specific input data were used. Some nets connections between blocks of the circuit are ignored or truncated. Simulations either behavior or timing have been done and the results is similar to its algorithm. Four best Xilinx chips have been chosen to extract comparison data of speed and occupied area. Further comparison of occupied area in terms of flip-flop and full adder has been made. In general, the proposed design overcome the previous published LCG circuit.
VESICO-VAGINAL FISTULA: EXPERIENCE OF 11 YEARS Taher, Taufik Rakhman; Zulfikar, Zulfikar; Wahyudi, Irfan; Rodjani, Arry
Indonesian Journal of Urology Vol 20, No 1 (2013)
Publisher : Indonesian Urological Association

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Objective: To evaluate the outcome of surgical repair in patients with vesico-vaginal fistula at Cipto Mangunkusumo Hospital. Material & Method: A retrospective study of 30 patients with vesico-vaginal fistula, who underwent surgical repair of the fistula at Urology Department Cipto Mangunkusumo Hospital between the period of 1998-2008, were reviewed. Patients were analyzed with regard to age, location of fistula, etiology, size of fistula, and surgical approach. The outcome of the surgery was analyzed. Results: This study included 30 patients who underwent surgery with age between 18-69 years old. The most common etiology was due to obstetrical trauma and hysterectomy. Bladder trigone was the most common location of fistulae (40%). During the surgery the transvesical (43%) approach was commonly used. However, the most excellent outcome was surgery by transvesical-transvaginal approach (100%). Success rate of fistula repair was 73%. Conclusion: This disease is a medically and psychosocially devastating condition for the patient. The diagnosis was easy but complicated in decision of treatment. Best results were observed by transvesical-transvaginal approach. Keywords: Vesico-vaginal fistulae, surgical approach, surgical outcome.
Expert System: Upaya Meningkatkan Efisiensi dan Efektivitas Audit Zulfikar, Zulfikar
Riset Akuntansi dan Keuangan Indonesia Vol 2, No 1 (2003): Jurnal Akuntansi dan Keuangan
Publisher : Universitas Muhammadiyah Surakarta

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Abstract

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BATCH INJECTION POTENTIOMETRY ASAM ASPARTAT, ASAM GLUTAMAT DAN ARGININ MENGGUNAKAN ELEKTRODA TUNGSTEN OKSIDA Muflihah, Yeni Maulidah; Masruroh, Heny; Zulfikar, Zulfikar
Alchemy Jurnal Penelitian Kimia Vol 10, No 1 (2014)
Publisher : Alchemy Jurnal Penelitian Kimia

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The presence of aspartic acid, glutamic acid and arginine in solution can be detected by potentiometric method using tungsten oxide electrode in a batch system. Characterization of tungsten oxide electrode used include linear range, limit of detection, sensitivity and reproducibility. Buffer type and concentration effect also studied to optimize the measurement results. Optimum conditions for detecting arginine was at pH 6.0 with a phosphate buffer concentration of 0.5 x 10-3 M. Correlation coefficient was obtained for 0.9864, the detection limit of 5.24 x 10-6 M, sensitivity 16.1 mV/decade with reproducibility 0 –7 %. Glutamic acid has a correlation coefficient of 0.9789, the detection limit of 3.80 x 10-6 M, the sensitivity of 9.2 mV/decade and reproducibility of 0 – 6 %. Aspartic acid has a correlation coefficient of 0.9949, the detection limit of 7.76 x 10-6 M, sensitivity of 13.4 mV/decade and reproducibility of 0 – 5 %.
Co-Authors Abdurrahman Abdurrahman Agus Subekti Ahmad Zaini Aileen Tan Shau Hwai, Aileen Aileen Tan Shaw Hwai, Aileen Tan Shaw Alfaiz Alfaiz Andi Rosdianti Razak, Andi Rosdianti Anggi, Muhammad Arief Pratomo, Arief Aritonang, Nikon Arry Rodjani Azizah, Laelah BABJI, A.S. Bambang Piluharto Bawono, Andy Dwi Bayu Berchah Pitoewas Dasmi Husin, Dasmi DEDI SOEDHARMA Dewi Sri Jayanti Djemereng, Asni Elvis Adril Erlangga Erlangga Erma Setiawati Eva Ayuzar, Eva Evalina, Noorly Farasyi, T. Reza Fatma Fatma Fitri, Zakiatul H, Abdul Azis Hadi, Sadiqul Hambal, Hambal Hamdani Hamdani Hariko, Rezki Hasnah Hasnah Hastu Sarkoro, Hastu Heny Masruroh, Heny Hermi Yanzi Hubbul Walidainy Ilma Sarimustaqiyma Rianse, Ilma Sarimustaqiyma Indra Sahputra, Indra Iradhatullah Rahim, Iradhatullah Irfan Wahyudi Irfandy, Jeszy Wan Iskandar Iskandar Jaya, Yales Veva Jeanny Maria Fatima, Jeanny Maria Joko Wasisto, Joko Josef, Adi Isworo Junaidi Junaidi Karimuddin, Karimuddin Karisma Wulan Ningtyas, Karisma Wulan Kunoli, Firdaus J. Mahdaliana, Mahdaliana Mahdinursyah Mahdinursyah, Mahdinursyah Mansur Mansur Masri Masri Mochammad Arifin Muddasir, Muddasir Muhammad Jufri Muhammad Rusli MUJIYATI MUJIYATI, MUJIYATI Mulliadi, Hendri Mulyadi, Agus Munawar Khalil Munawwar Khalil, Munawwar Murib, Teguh Wan Muwakhidah, Muwakhidah Nasrizal, Nasrizal Nasrul, Anto Ng Jol Ern, Ng Jol Ni Putu Nita Wijayanti Nini Firmawati Noer Sasongko, Noer Nofrita Nofrita Novita Andarini Nurlina Nurlina Nursiam, Nursiam Pariabti Palloan Pasaribu, Faisal Irsan Poedji Loekitowati Hariani Putra, Risandi Dwirama Rafiudin, Rafiudin Ramadi Ramadi, Ramadi Ramdhani, Yulia Rapika, Rapika Razali Razali Rici Kardo, Rici Rinaldy, Alfian Riswandi Riswandi Rosdiana Rosdiana Rudiansyah, Teuku Ryninta, Morinda Goestin Safwan Safwan, Safwan Sahat Sahat Saifullah Saifullah Saleh, Djuliati Sandria, T. Feri Santi Syafril, Santi Santoso, Ratna Endah Sem Paulus, Sem Septya Suarja, Septya Siswo Martono, Siswo Siswoyo Siswoyo Siti Zubaidah Sri Mulyadi Sri Murwanti, Sri Sri Wahyuni Subki, Subki Sugeng Mulyono Suhana, Mario Putra Sukardi Putra, Sukardi Sulaiman Sulaiman Sulistiawaty Sulistiawaty, Sulistiawaty Susanna Susanna Sutiana Sutiana, Sutiana Syahruddin Syahruddin Syaiful Anwar Tafsin, Maruf Tafsin, Maruf Tamrin Tamrin Tandiyo Rahayu Taufik Rakhman Taher Tawardi, Tawardi Teuku Reza Ferasyi Trio F. Nugroho Umam, Khairil Umar, Sayed Umar, Sayed Usman Rianse, Usman Vici Saka Dirgantara, Vici Saka Vistarani Arini Tiwow Wa Kuasa Baka, Wa Kuasa WAN AIDA, W.M. Weka Gusmiarty Abdullah, Weka Gusmiarty Widiatmaka, Widiatmaka Windarti, Esti Wiwin Ambarwulan Wiwit Aditama Yeni Maulidah Muflihah Yulia, Darma Yulianda, Jeki Yuswar Yunus Zulfigar Yasin, Zulfigar Zulfikar Yasin, Zulfikar Zulhelmi Zulhelmi, Zulhelmi Zumarni, Zumarni