Claim Missing Document
Check
Articles

Found 7 Documents
Search

AC-DC PFC Converter Using Combination of Flyback Converter and Full-bridge DC-DC Converter Efendi, Moh. Zaenal; Rizal, Abdul; Erzanuari, Aldi; ., Suryono; Windarko, Novie Ayub
EMITTER International Journal of Engineering Technology Vol 2, No 1 (2014)
Publisher : Politeknik Elektronika Negeri Surabaya (PENS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (6864.867 KB)

Abstract

This paper presents a combination of power factor correction converter using Flyback converter and Full-bridge dc-dc converter in series connection. Flyback converter is operated in discontinuous conduction mode so that it can serve as a power factor correction converter and meanwhile Full-bridge dc-dc converter is used for dc regulator. This converter system is designed to produce a 86 Volt of output voltage and 2 A of output current. Both simulation and experiment results show that the power factor of this converter achieves up to 0.99 and meets harmonic standard of IEC61000-3-2.Keywords: Flyback Converter, Full-bridge DC-DC Converter, Power Factor Correction.
PENINGKATAN HASIL BELAJAR KOMPETENSI MENGOPERASIKAN APLIKASI PERANGKAT LUNAK DENGAN MENERAPKAN MODEL EXPLICIT INSTRUCTION PADA SISWA KELAS XI PROGRAM KEAHLIAN ADMINISTRASI PERKANTORAN SMK PGRI 2 TAMAN Rizal, Abdul
Economic Education Analysis Journal Vol 2 No 3 (2013): Economic Education Analysis Journal
Publisher : Economic Education Analysis Journal

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

Abstract

Keberhasilan proses pembelajaran dapat dilihat dari hasil belajar. Dari hasil nilai ulangan harian pada observasi awal di kelas XI AP 3 SMK PGRI 2 Taman Pemalang terdapat 19 siswa belum tuntas belajar dan 25 tuntas belajar dari jumlah 44 siswa. Hal ini ditunjukkan pada proses pembelajaran yang kurang variatif dan cenderung pasif, serta menggunakan model dan metode yang kurang tepat, dan kurangnya pendekatan pada siswa. Penelitian ini merupakan penelitian tindakan kelas dengan menggunakan pendekatan model pembelajaran Explicit Instruction. Populasi dalam penelitian ini adalah seluruh siswa kelas XI Administrasi Perkantoran, dengan siswa berjumlah 44 siswa, metode yang digunakan dalam penelitian ini adalah metode dokumentasi, observasi, dan metode tes. Dari hasil penelitian, rata-rata tes evaluasi hasil belajar siswa pada siklus I sebesar 74,20, pada siklus II yaitu 78,29. Persentase ketuntasan klasikal pada siklus I sebesar 68,18%, pada siklus II sebesar 79,54%. Berarti terjadi peningkatan hasil belajar siswa sebesar 11,36% dari siklus I ke siklus II. Disarankan guru dapat juga menerapkan variasi pembelajaran dan tingkat kreativitas didalam proses pembelajaran dengan model dan metode yang tepat disesuaikan dengan materi yang akan diberikan kepada siswa. The success of learning process can be seen from the results of learning. There were many students result studies which were decreased. From the results of the daily tests on the observed values at the beginning of class XI AP 3 SMK PGRI 2 Taman Pemalang there are 19 students and 25 have not been throughly studied than the number of 44 students. Those maybe caused by the lack of variety and the passiveness in learning process, the use of inappropriate model and method, and the lack of approximation on the students. This study is an action research approach to learning models using Explicit Instruction. The population in this study is the students of class XI-Office Administration, with the total 44 students. The methods which are used in this study were documentation, observation, and test. The result can be seen from their mean scores study learning of cycle 1 was 74.20 and cycle 2 was 78.29. The percentage classical completeness in the first cycle of 68.18 %, the second cycle of 79.54 %. The concluded that an increase in student learning outcomes by 11.36% from the first cycle to the second cycle. Due to the success of learning using the learning model of Explicit Instruction method, suggests that the teachers can apply more varied and creative learning in the process of teaching and learning using model and method which are appropriate to the material which will be given to the students.
AC-DC PFC Converter Using Combination of Flyback Converter and Full-bridge DC-DC Converter Efendi, Moh. Zaenal; Rizal, Abdul; Erzanuari, Aldi; ., Suryono; Windarko, Novie Ayub
EMITTER International Journal of Engineering Technology Vol 2, No 1 (2014)
Publisher : Politeknik Elektronika Negeri Surabaya (PENS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (6864.867 KB) | DOI: 10.24003/emitter.v2i1.21

Abstract

This paper presents a combination of power factor correction converter using Flyback converter and Full-bridge dc-dc converter in series connection. Flyback converter is operated in discontinuous conduction mode so that it can serve as a power factor correction converter and meanwhile Full-bridge dc-dc converter is used for dc regulator. This converter system is designed to produce a 86 Volt of output voltage and 2 A of output current. Both simulation and experiment results show that the power factor of this converter achieves up to 0.99 and meets harmonic standard of IEC61000-3-2.Keywords: Flyback Converter, Full-bridge DC-DC Converter, Power Factor Correction.
The Carrying Capacity of Crop as Cow and Goat Feed in Muna Barat Regency Abadi, Musram; Nasiu, Firman; Surahmanto, Surahmanto; Rizal, Abdul; Fatmawati, Fatmawati
Buletin Peternakan Vol 43, No 3 (2019): BULETIN PETERNAKAN VOL. 43 (3) AUGUST 2019
Publisher : Faculty of Animal Science, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21059/buletinpeternak.v43i3.34630

Abstract

This study aimed to assess the potency of forages in Muna Barat Regency as cattle and goat feed. The study was performed by performing forage observation based on the forage production multiplied by the harvested area, and presented on dry matter unit (DM). Sampling was carried out by using a designed square tool. Forages that was evaluated on this study was legume groups. Data analysis was performed by using carrying capacity method. The study reveals that there are 8 types of forages found in Muna Barat Regency. The dry matter of those forages can meet the feed requirement for cattle and goat in Muna Barat Regency. The result of KPRR analysis shows that Muna Barat Regency has carrying capacity for 2,669 cattle and 3,293 goat.
Analisis Residu Tetrasiklin pada Hati Ayam Potong di Kota Kendari Yaddi, Yamin; Rizal, Abdul; Libriani, Restu; Zulkarnain, Deki; Fitrianingsih, Fitrianingsih
Jurnal Ilmu dan Teknologi Peternakan Tropis Vol 6, No 1 (2019): JITRO, Januari
Publisher : Universitas Halu Oleo

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (129.482 KB) | DOI: 10.33772/jitro.v6i1.5573

Abstract

ABSTRAKPenelitian ini bertujuan  untuk menganalisis dan menentukan keberadaan serta tingkat residu antibiotik terutama golongan tertasiklin pada sampel lapang hati ayam broiler yang berada di Kota Kendari. Metode yang digunakan meliputi observasi lapang, pengambilan sampel dan pengujian sampel di laboratorium. Penentuan lokasi pengambilan sampel secara purposive sampling. Lokasi sampling (pasar) yang dijadikan sebagai tempat pengambilan sebanyak 5 (lima) pasar sesuai dengan kriteria yang telah ditentukan. Jenis sampel yang digunakan adalah hati ayam potong yang berasal dari beberapa pedagang dengan kisaran bobot karkas/bobot hati yang berbeda.  Pengambilan sampel hati dilakukan dengan metode simple random sampling. Pengujian sampel digunakan sesuai dengan Standar Nasional Indonesia dengan metode Tapis. Pengujian residu dilakukan melalui uji skrining test. Hasil penelitian menunjukkan pemeriksaan residu antibiotik pada semua sampel adalah negatif. Kesimpulannya adalah produk peternakan dari ayam potong yang di pasarkan di Kota Kendari sebagian besar tidak mengandung residu antibiotik. Peternak ayam potong yang ada di Kota Kendari sudah mulai bijak dalam penggunaan antibiotik serta penentuan waktu panen.Kata kunci: ayam broiler, hati ayam, residu antibitikABSTRACT               This study aimed to analyze and determine the presence and level of antibiotic residue, especially tetracycline group in broiler chicken liver in Kendari. The methods used in this study were field observations, sampling, and laboratory testing. Determination of sampling location was done by purposive sampling. The sampling location (market) chosen for this study were 5 (five) markets based on predetermined criteria. The type of sample collected was broiler liver from several butchers with different ranges of carcass / liver weight. Liver sampling was done using simple random sampling method. The sample was tested using Tapis method in accordance to Indonesian National Standard (SNI). Tetracycline residue was tested by screening test. The results showed negative antibiotic residues in all samples. It can be concluded that livestock products from broiler chicken in Kendari market are mostly free from antibiotic residue. It can be assumed that the broiler farmers in Kendari have become wise in using antibiotics and the determination of harvest after antibiotic treatment.  Keywords: antibiotic residues, broilers liver, broiler meat
AC-DC PFC Converter Using Combination of Flyback Converter and Full-bridge DC-DC Converter Efendi, Moh. Zaenal; Rizal, Abdul; Erzanuari, Aldi; ., Suryono; Windarko, Novie Ayub
EMITTER International Journal of Engineering Technology Vol 2 No 1 (2014)
Publisher : Politeknik Elektronika Negeri Surabaya (PENS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (6864.867 KB) | DOI: 10.24003/emitter.v2i1.21

Abstract

This paper presents a combination of power factor correction converter using Flyback converter and Full-bridge dc-dc converter in series connection. Flyback converter is operated in discontinuous conduction mode so that it can serve as a power factor correction converter and meanwhile Full-bridge dc-dc converter is used for dc regulator. This converter system is designed to produce a 86 Volt of output voltage and 2 A of output current. Both simulation and experiment results show that the power factor of this converter achieves up to 0.99 and meets harmonic standard of IEC61000-3-2.Keywords: Flyback Converter, Full-bridge DC-DC Converter, Power Factor Correction.
Analisis Strategi Pemasaran Agroindustri Opak di Desa Tuntungan I Kecamatan Pancur Batu Kabupaten Deli Serdang Harahap, Iffan; Habibi, Dian; Rizal, Abdul
Jurnal Agriuma Vol 2, No 1 (2020): AGRIUMA APRIL
Publisher : Universitas Medan Area

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31289/agr.v2i1.3723

Abstract

The agricultural sector in Indonesia still has many opportunities and has bright prospects that have not yet been explored. In the agribusiness system, agro-industry is one of the subsystems which together with other subsystems form agribusiness. Cassava is an important source of carbohydrate in the world. In Indonesia, cassava is the number three staple food after rice and corn. The purpose of this research is to determine the Opak Industry Agro Marketing Strategy in Tuntungan I Village, Pancur Batu District, Deli Serdang Regency using survey methods, while data analysis is done using descriptive methods and SWOT analysis. The results of the study show that the strategy obtained is the SO (Strengths-Opportunites) strategy, which is to use the power to take advantage of existing opportunities by increasing production by optimizing the availability of raw materials to increase product marketing in the market. (S1, O1) Optimize market share from outside the region by utilizing raw material prices (S2, O2) Empowering family workers in utilizing supporting facilities and infrastructure in the production process (S1, S3-O3) Utilizing the selling price of products to improve local food products became a trend of the community with a market share of products outside the Region (S4.02, O4).