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All Journal Majalah Ilmiah Biologi BIOSFERA: A Scientific Journal Journal TEPAT: Teknologi Terapan untuk Pengabdian Masyarakat Islaminomics: Journal of Islamic Economics, Business and Finance Jurnal Sains Dirgantara Jurnal Digit : Digital of Information Technology Jurnal Teknik Mesin Sinergi Prosiding Seminar Nasional Official Statistics Metalurgi

Abdul Rachman

Unknown Affiliation

Author-ID : 3486098

Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Public Health Social Sciences

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PENGARUH AKTIVITAS MATAHARI TERHADAP KERAPATAN ATMOSFER ATAS BERDASARKAN DATA POSISI GPS SATELIT LAPAN-A2 (SOLAR ACTVITY INFLUENCE ON THE UPPER ATMOSPHERIC DENSITY DERIVED FROM GPS DATA ON LAPAN-A2 SATELLITE) Tiar Dani; Rhorom Priyatikanto; Slamet Supriadi; Abdul Rachman; Amrullah A. Qadir
Jurnal Sains Dirgantara Vol 14, No 2 (2017)
Publisher : Lembaga Penerbangan dan Antariksa Nasional

Studies on atmospheric density were very important to obtain a correction factor for the atmospheric density model. Thus, improvement of atmospheric models accuracy, i.e. CIRA, JASCHIA, NRLMSISE, became important in its application for re-entry prediction, satellite tracking and mitigation of the collisions probability between active satellites with space debris. GPS equipment installed in LAPAN-A2 indirectly measured the upper atmospheric density variation in-situ from the satellite orbit path. Notwithstanding the measurement had a lower temporal resolution than using accelerometer, but still gives better resolution than using Two-Line Element (TLE) data. This study had successfully determined upper atmospheric density variation with a 10 second resolution using LAPAN-A2 GPS data. The LAPAN-A2 GPS data validated using In-track Radial Cross-track (RIC) had ± 2 km error compared to the TLE data. It was also found that there was influence of solar activity on atmospheric density changes obtained from the LAPAN-A2 GPS data. AbstrakStudi kerapatan atmosfer atas sangat penting untuk memperoleh faktor koreksi dari suatu model kerapatan atmosfer. Peningkatan akurasi dari model atmosfer yang telah ada (CIRA, JASCHIA, NRLMSISE) sangat penting dalam penerapannya untuk prediksi re-entry, penjejakan satelit dan prakiraan kemungkinan terjadinya tabrakan antara satelit aktif dengan sampah antariksa. Peralatan GPS yang terpasang di satelit LAPAN-A2 secara tidak langsung dapat melakukan pengukuran in-situ perubahan kerapatan atmosfer atas dari orbit yang dilaluinya, meskipun tingkat resolusi temporalnya masih lebih rendah dibandingkan menggunakan instrumen akselerometer tetapi masih jauh lebih baik dibandingkan menggunakan data Two-Line Element (TLE). Studi ini telah berhasil memperoleh variasi kerapatan atmosfer atas dengan resolusi 10 detik menggunakan data posisi GPS LAPAN-A2. Selain itu, diperoleh pula tingkat kesalahan dalam koordinat satelit (Radial Intrack Crosstrack - RIC) data TLE terhadap data posisi GPS LAPAN-A2 sebesar ± 2 km. Selain itu terlihat pula pengaruh aktivitas matahari terhadap perubahan kerapatan atmosfer atas yang diperoleh dari data posisi GPS LAPAN-A2

APLIKASI PENDAFTARAN SISWA BARU DENGAN SISTEM SELEKSI MENGGUNAKAN METODE SIMPLE ADDITIVE WEIGHTING (SAW) PADA SMK MIFTAHUL HUDA CIWARINGIN Lena Magdalena; Abdul Rachman
Jurnal Digit Vol 7, No 1 (2017)
Publisher : Universitas Catur Insan Cendekia (CIC) Cirebon

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51920/jd.v7i1.14

AbstrakPendaftaran siswa baru merupakan suatu kegiatan yang wajib dilakukan pihak penyelenggara sekolah yang bertujuan untuk menampung, menyaring, serta menyeleksi para calon peserta didik sebelum dinyatakan sebagai peserta didik tetap. SMK Miftahul Huda Ciwaringin adalah salah satu sekolah kejuruan yang terus berkembang dengan bertambahnya jumlah siswa baru yang mendaftar setiap tahunnya. Akan tetapi proses pendaftaran siswa baru di SMK Miftahul Huda Ciwaringin masih menggunakan metode manual yang mengakibatkan banyaknya waktu yang terbuang dalam melakukan proses pendaftaran sehingga menyebabkan berkurangnya efisiensi waktu dari calon siswa. Sesuai dengan peraturan PPDB 2015 yang sudah ditentukan oleh pihak SMK Miftahul Huda Ciwaringin untuk menyeleksi calon siswa, maka diperlukan kriteria-kriteria untuk penentuan dalam menetapkan seorang siswa baru, maka dibutuhkan sebuah sistem dengan metode Simple Additive Weighting (SAW). Metode SAW ini mengharuskan pembuat keputusan menentukan bobot bagi setiap atribut. Skor total untuk alternatif diperoleh dengan menjumlahkan seluruh hasil perkalian antara rating (yang dapat dibandingkan lintas atribut) dan bobot tiap atribut. Sistem ini akan menampilkan prioritas-prioritas tertinggi hingga terendah dari calon-calon siswa tersebut, sehingga akan memudahkan dan membantu pihak sekolah dalam mengambil keputusan. Dengan menggunakan metode SAW dalam sistem seleksi siswa baru di SMK Miftahul Huda Ciwaringin bertujuan untuk memudahkan panitia dalam menentukan perankingan calon siswa untuk menyeleksi siswa yang memiliki skor nilai yang sama, mempermudah proses dalam sistem seleksi penerimaan calon siswa baru di SMK Miftahul Huda Ciwaringin. Kata Kunci : Pendaftaran, Miftahul, SAW, Seleksi, SMK.

Penetapan Margin Dalam Pembiayaan Murabahah Abdul Rachman; Erik Pratama
ISLAMINOMICS: JOURNAL OF ISLAMIC ECONOMICS, BUSINESS AND FINANCE Vol 7, No 2 (2016): ISLAMINOMICS: Journal of Islamic Economics, Business and Finance
Publisher : STES Islamic Village

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47903/ji.v7i2.52

Penelitian ini bertujuan untuk mengetahui metodepenentuan margin yang sesuai dengan syari’ah, mengetahuimetode penentuan margin dalam pembiayaan murabahah padaPT. Bank Pembiayaan Rakyak Syariah (BPRS) Berkah Ramadhan- Tangerang, dan apakah metode penentuan margin dalampembiayaan murabahah pada PT. Bank Pembiayaan RakyakSyariah (BPRS) Berkah Ramadhan - Tangerang telah patuhterhadap kesesuaian syari’ah. Objek penelitian dalam penelitianini adalah PT. Bank Pembiayaan Rakyak Syariah (BPRS) BerkahRamadhan - Tangerang. Metode penelitian yang digunakan olehpeneliti dalam penelitian ini adalah analisis deskriptif kualitatif.Kesimpulan penelitian ini adalah penentuan margin akadmurabahah yang syar’i adalah penentuan margin yang tidakmelanggar nilai-nilai keadilan dan tidak eksploitatif, penentuanmargin akad murabahah PT. Bank Pembiayaan Rakyak Syariah(BPRS) Berkah Ramadhan - Tangerang adalah dengan metodemark-up pricing dan dengan pertimbangan Direct/IndirectCompetitors Market Rate (ICMR/DCMR) dengan rata-ratabesaran margin 1,5% - 2% / bulan.

Efektifitas Pengelolaan Dana Zakat melalui Program Z-MART di BAZNAS Kota Tangerang (Studi Kasus Pada BAZNAS Kota Tangerang) Abdul Rachman; Kukuh Kukuh
ISLAMINOMICS: JOURNAL OF ISLAMIC ECONOMICS, BUSINESS AND FINANCE Vol 11, No 1 (2021): ISLAMINOMICS: JOURNAL OF ISLAMIC ECONOMICS, BUSINESS AND FINANCE
Publisher : STES Islamic Village

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47903/islaminomics.v11i1.163

This study aims to analyze how effective the management of zakat funds is through the Z-Mart program carried out by the Tangerang City National Amil Zakat Agency to be able to help small stalls belonging to mustahik zakat in capital, business management and branding. This study uses qualitative methods to describe the management of zakat funds through the Z-Mart program. The source of this research data was taken through observations at several small stalls belonging to mustahik zakat which were selected and fostered in the Z-Mart program. The researcher also conducted interviews with several core and supporting informants, such as the person in charge of the Z-Mart program at the Tangerang City National Amil Zakat Agency, zakat mustahik who own a small shop, consumers and others. Other data are taken from various documentations, articles and others related to research. The results of this study illustrate that the management of zakat funds carried out by the Tangerang City National Amil Zakat Agency has been effective in Z-Mart branding. However, in terms of business management and the capital needed by small stalls, the Z-Mart program is deemed less effective because the capital provided is still lacking because there are many mustahik needs as poor asnaf who have to meet the needs of their family's life, especially when in a situation like this their income. down from before the pandemic.

Tipe Echolokasi serta Struktur Larynx pada Miniopterus dan Rhinolophus Abdul Rachman; Johanes Sugiyanto; Luthfi Nurhidayat; Ardaning Nuriliani; Aswi A. Rofiqoh; Agus Hermawan; Roesma Narulita
Majalah Ilmiah Biologi BIOSFERA: A Scientific Journal Vol 31, No 3 (2014)
Publisher : Fakultas Biologi | Universitas Jenderal Soedirman

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.mib.2014.31.3.209

A bat is the only mamal with true flight ability and have capability to perform echolocation. Miniopterus and Rhinolopus are bat species that have some different morphological characteristics but both of them commonly live in the cave. The research were purposed to study the differences and connection of echolocation call type and larynx’s structure of Miniopterus and Rhinolopus The two bat species were collected from 20th and 23th cave of Japanese Cave Complex, Kaliurang, Sleman, Yogyakarta. Specimens were taken to the laboratory for further analysis. Echolocation signals of both bat species were recorded using ultrasonic microphone and were analyzed with Batscan 9.0 software. Specimens were subjected for anatomical and histological structure analysis of the larynx. Anatomical structure observations were carried out with specimens dissection and they were fixed in 20% formol solution. Some samples of larynx of each species were processed and stained with Alizarin Red’s-Alcian Blue staining for larynx’s bones observation. Histological preparation of larynx was performed using paraffin method and stained with Hematoxylin-Eosin and MAF. The results showed that echolocation signals of Minipterus have lower frequency (peak frequency between 44.1-51.6kHz) compared to that of Rhinolopus (peak frequency between 54.4-64.1 kHz). However, Miniopterus has better ability to modulate the signal frequency than Rhinolopus Both species are able to produce a long-duration signal but Rhinolopus can produce longer signal duration. These results can be related to the differences of larynx’s anatomical and histological structure of both species which are equally able to keep the intensity of echolocation signals but have different work mechanisms.

Rancang Bangun Alat Uji Tarik Serat Alam Muhammad Arsyad; Jeremiah Ritto; Abdul Rachman; Dewi Rachma Ayu Lestari; Edyson Palembangan
Jurnal Teknik Mesin Sinergi Vol 17, No 1 (2019): April 2019
Publisher : Politeknik Negeri Ujung Pandang

The aim of this research are to design and to make natural fiber tensile strength test as well as to recognize the characteristics of natural fiber. The specimen testing is done using ASTM 3379-02 standard. The methods that we used are designing, making, assembling and testing. This equipment is designed simply by using water as a load. When used, the water continues to be flowed to the reservoir which is connected in such a way that the fiber breaks. When the fiber breaks, the mass of water is weighed as a burden which causes the fiber to break. Tensile strength of the results of testing equipment is 282.35 N/mm2 compared with the tensile strength of the results of the tensile test equipment at UNM 186.42 N/mm2 and the value of the tensile strength of the literature 284.08 N/mm2. The value obtained is between the tensile strength of the results of the UNM tensile test equipment with the tensile strength of the literature. According to these results it was concluded that the tensile test equipment made can be used to determine the tensile strength of natural fibers, one of which is coconut fiber. The natural fiber tensile test equipment can be used to determine the tensile strains of coconut fiber.

RANCANG BANGUN NERACA ASET FISIK DAN MONETER SUMBER DAYA PERIKANAN TANGKAP LAUT INDONESIA 2002-2011 Fikri Nata Prasetiawan; Abdul Rachman
Seminar Nasional Official Statistics Vol 2019 No 1 (2019): Seminar Nasional Official Statistics 2019
Publisher : Politeknik Statistika STIS

Permasalahan overfishing Indonesia erat kaitannya dengan lemahnya pengelolaan perikanan tangkap laut karena tidak tersedianya kerangka statistik sebagai dasar kebijakan. Oleh karena itu, penyediaan kerangka statistik sebagai dasar pertimbangan perumusan kebijakan pengelolaan perikanan tangkap laut Indonesia penting dilakukan. Penelitian ini bertujuan untuk melakukan perancangan dan pembangunan neraca aset fisik dan moneter sumber daya perikanan tangkap laut Indonesia secara agregatif dari 11 wilayah perairan pantai tahun 2002-2011. Kerangka penyusunan neraca didasarkan kepada kerangka System of Environmental-Economic Accounting Agriculture, Forestry and Fishery (SEEA-AFF). Penyusunan neraca aset fisik menggunakan pemodelan bioekonomi Gordon-Schaefer dengan variasi model Schnute dan Clark Yoshimoto Pooley (CYP) untuk menghitung stok dan dinamika biomassa sumber daya perikanan tangkap laut. Teknik estimasi parameter regresi yang digunakan adalah model regresi data panel. Sedangkan, valuasi resource rent digunakan dalam penyusunan neraca aset moneter. Hasil neraca tersusun menunjukkan bahwa terdapat kondisi economic overfishing di sejumlah wilayah perairan pantai. Kondisi tersebut merupakan keadaan yang merugikan baik bagi ekonomi penangkapan maupun biomassa sumber daya perikanan tangkap laut Indonesia. Hasil penyusunan neraca aset sumber daya perikanan tangkap laut dalam penelitian ini diharapkan dapat digunakan sebagai dasar perumusan kebijakan dan rujukan pengembangan penyediaan kerangka statistik resmi dalam pengelolaan sumber daya perikanan tangkap laut Indonesia.

KARAKTERISASI PASIR SILIKA CIBADAK SUKABUMI SEBAGAI BAHAN BAKU PEMBUATAN RAMMING MIX SILICA[Characterization of Cibadak Sukabumi Silica Sand As Raw Material for Ramming Mix Silica Manufacturing] Abdul Rachman; Frank Edwin; Pius Sebleku
Metalurgi Vol 27, No 3 (2012): Metalurgi Vol.27 No.3 Desember 2012
Publisher : National Research and Innovation Agency (BRIN)

Sosialisasi Mitigasi Bencana Banjir dengan Melibatkan Peran Serta Masyarakat di Pesisir Danau Tempe Kabupaten Wajo Mukti Ali; Sri Aliah Ekawati; Ariuddin Akil; Mimi Arifin; Ihsan Ihsan; Wiwik Wahidah Osman; Yashinta K. Dewi; Abdul Rachman; Isfa Sastrawati; Marly Valenti P; Venny Veronica N; Laode Muh. Asfan Mujahid; Gafar Lakatupa; Sri Wahyuni; Jayanti Mandasari; Suci Anugrah Yanti; Dewa Sagita Alfadin N; Muh. Fachrul Razy; Masfirah Sriwulandari
JURNAL TEPAT : Teknologi Terapan untuk Pengabdian Masyarakat Vol 6 No 1 (2023): Kesadaran Teknologi untuk Mengatasi Permasalahan Kemasyarakatan
Publisher : Faculty of Engineering UNHAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25042/jurnal_tepat.v6i1.294

The coastal of Lake Tempe is located in Watallipue Village, Wajo Regency, which is one of the flood-prone residential areas. The flood disaster that occurred in the coastal area of Lake Tempe caused various problems to arise both from physical and non-physical aspects. Flooding in Watallipue Village occurs almost every year due to the overflow of Lake Tempe and surrounding rivers with heights ranging from 1m to 5m. Based on field observations, 100% of the coastal communities of Lake Tempe have been affected by floods. At the time of the flood, people living in a radius of 50-100m from the river bank were evacuated to a safe place because the flood reached a height of 5-6m. The purpose of this community service activity is to socialize flood disaster mitigation by involving community participation. The implementation method is in the form of community service. Data collection techniques are observation, documentation and interviews. The data analysis techniques are descriptive qualitative and spatial. As a first step, interviews and questionnaires were distributed to 56 respondents to determine the level of understanding of flood mitigation. Initial interviews showed only 23 of the 56 communities knew of the efforts that could be made in mitigating the impact of flooding. In addition, there are only 12 people who know the importance of signs, evacuation routes and temporary evacuation sites. Based on these conditions, socialization was carried out in the form of FGDs related to the concept of disaster mitigation by involving the community. The form of implementation of this concept is that the community plays a role in determining evacuation routes during floods, determining evacuation points in the area around the residence and compiling efforts to reduce the risk of flooding in the coastal area of Lake Tempe. The community conveyed that they were active in discussions and had high hopes for the government's assistance in efforts to mitigate flood disasters on the shores of Lake Tempe. The results of this activity show an increase in public understanding of flood mitigation. The post-test results showed that 56 respondents (100%) understood the efforts that can be made in reducing the impact of flood disasters and the importance of providing signs, evacuation routes and temporary evacuation sites.

Co-Authors Agus Hermawan Amrullah A. Qadir Ardaning Nuriliani Ariuddin Akil Aswi A. Rofiqoh Dewa Sagita Alfadin N Dewi Rachma Ayu Lestari Edyson Palembangan Erik Pratama Fikri Nata Prasetiawan Frank Edwin Gafar Lakatupa Ihsan Ihsan Isfa Sastrawati Jayanti Mandasari Jeremiah Ritto Johanes Sugiyanto Kukuh Kukuh Laode Muhammad Asfan Mujahid Lena Magdalena Marly Valenti P Masfirah Sriwulandari Muh. Fachrul Razy Muhammad Arsyad Mukti Ali Nurhidayat, Luthfi Pius Sebleku Rhorom Priyatikanto Roesma Narulita Slamet Supriadi Sri Aliah Ekawati Sri Wahyuni Suci Anugrah Yanti Susy Asteria Irafany1, Shirly Wunas2, Slamet Trisutomo3, Arifuddin Akil4, Mimi Arifin5, Abd. Rachman Rasyid6 Tiar Dani Venny Veronica N Wiwik Wahidah Osman Yashinta K. Dewi

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