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Struktur Komunitas Fitoplankton di Danau Toba, Sumatera Utara Arif Rahman; Niken Tunjung Murti Pratiwi; Sigid Hariyadi
Jurnal Ilmu Pertanian Indonesia Vol. 21 No. 2 (2016): Jurnal Ilmu Pertanian Indonesia
Publisher : Institut Pertanian Bogor

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (728.096 KB) | DOI: 10.18343/jipi.21.2.120

Abstract

Lake Toba is the largest lake in Indonesia, located in the Province of North Sumatra. Lake Toba is used to aquaculture, agricultural, tourism, and residential areas. These activities will produce organic and anorganic matter that can affect water quality and can cause eutrophication. Some indicators of eutrophication are an increase in phytoplankton biomass and changes in phytoplankton community structure. The aim of this study was to describe the phytoplankton community structure in Lake Toba. This study was conducted on 20-24 October 2014 at 23 stations around the Samosir Island, Lake Toba. The results showed that the phytoplankton abundance ranged 216-68.319.716 cells/m3. The phytoplankton composition consists of 35 genera from four classes: Cyanophyceae, Chlorophyceae, Bacillariophyceae, and Dinophyceae. Chyanophyceae is a dominant phytoplankton groups based on the composition of abundance (>40%). Structure of phytoplankton communities in Lake Toba dominated by Anabaena.
KIVEQ-1 Kasus Torsio Usus dan Ruptur Akibat Enterolith Budhy Jasa Widyananta; Fitri Dewi Fathiyah; Wiwid Rhuwaida; Arif Rahman
Hemera Zoa Proceedings of the 20th FAVA & the 15th KIVNAS PDHI 2018
Publisher : Hemera Zoa

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Abstract

Kejadian enterolith pada kuda di Indonesia sangat sering dilaporkan, akan tetapi saat ini masih belum cukup literatur yang membahas tentang gejala klinis dan teknik diagnosanya.Rose at al, 2003 mengatakan Enterolith merupakan konsentrasi mineral yang umumnya terbentuk pada usus besar walaupun terkadang dapat muncul sebagai sumbatan di usus halus.Pakan dengan kandungan nitrogen, magnesium dan phospor yang tinggi diperkirakan menjadi salah satu penyebab terbentuknya entertolith. Alfalfa (lucerne) hay merupakan salah satu pakan yang mengandung nitrogen dan magnesium dalam jumlah tinggi (Rose et al, 2003)
Sistem Temu-Balik Citra Menggunakan Jarak Histogram dalam Model Warna YIQ Arif Rahman
Seminar Nasional Aplikasi Teknologi Informasi (SNATI) 2009
Publisher : Jurusan Teknik Informatika, Fakultas Teknologi Industri, Universitas Islam Indonesia

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Abstract

Komposisi warna merupakan salah satu ciri dari citra yang dapat digunakan sebagai pembeda dalam sistemtemu-balik citra. Komposisi warna piksel dalam suatu citra dapat direpresentasikan dalam histogram warna.Tingkat kemiripan warna antar citra dapat ditentukan berdasarkan nilai jarak antar histogramnya. Semakinkecil nilai jarak antar histogram, semakin tinggi tingkat kemiripan suatu citra. Jarak antar histogram padacitra berwarna dihitung untuk setiap komponen warna. Penelitian ini menggunakan model warna YIQ. Tiapkomponen warna YIQ nilainya dikuantisasi menjadi 128, 64 dan 64 level. Komponen warna Y memiliki jumlahlevel lebih banyak karena memiliki pengaruh lebih dominan pada persepsi mata manusia terhadap warnadibanding komponen yang lain. Jumlah piksel dalam citra berbeda-beda sesuai dengan ukuran citra, sehinggahistogram perlu dinormalisasi agar invarian terhadap ukuran citra. Normalisasi dilakukan dengan membagijumlah piksel tiap level dengan jumlah total piksel citra, sehingga didapatkan jangkauan nilai [0,1] untuk tiaplevel. Total jarak antar histogram merupakan hasil jumlahan dari jarak tiap levelnya yang dihitungmenggunakan rumus jarak Manhattan. Hasil temu-balik diranking berdasarkan nilai jarak antar histogramnya.Kata Kunci: Temu-balik, citra, histogram, YIQ
SOLVING LARGE SCALE TRANSPORTATION PROBLEM IN FERTILIZER DISTRIBUTION TO MINIMIZE TRANSPORTATION COST Angga Akbar Fanani; Arif Rahman; Astuteryanti Tri Lustyana; Sri Widiyawati
Journal of Engineering and Management in Industrial System Vol 10, No 1 (2022)
Publisher : Badan Penerbit Jurnal, Faculty of Engineering, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jemis/2022.010.01.3

Abstract

Indonesia is agricultural country which have high degree of dependency to the fertilizer availability, it is because fertilizer has important role for the land fertility. Fertilizer is needed by the farmers all the time, from the initial period of planting the crop to the harvest period. This condition requires the fertilizer industry to be able to deliver fertilizer exactly when fertilizer is needed. The complexity of the transportation problem is indicated by the number of nodes in the model that represent both source and destination. In the distribution of fertilizer, the number of sources is relatively small, but the number of destinations is very large, where the number reaches 50 destination points. In solving large scale transportation complex problems, modeling techniques using Linier Programming are needed. Fertilizer demands are fulfilled from 42 buffer warehouses, and the optimal allocation for petrochemical distribution is supplied by 47 production partners. Based on the results of the calculation process using linier programming, the optimal distribution cost is 939,854,960.00 rupiahs. Meanwhile, the initial cost of distribution is IDR 1,032,267,660.00. There was a decrease of 92,412,700.00 rupiahs or about 9%. Optimization of the distribution process is also marked by the decrease in the number of production partners needed to meet the needs of 42 buffer warehouses. In the initial distribution, 56 production partners sent their products, after the calculation process only 47 production partners were needed.
Strategi Pemasaran Pada UKM Keripik Tempe Sanan Malang Rahmi Yuniarti; Arif Rahman; Moch. Choiri
Jurnal Teknik Industri Vol. 14 No. 2 (2013): Agustus
Publisher : Department Industrial Engineering, University of Muhammadiyah Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22219/JTIUMM.Vol14.No2.174-185

Abstract

Small and Medium Enterprises (SMEs) have a major role in the economy of country , both in contribution to the Gross Domestic Product and total employment. In order to develop its business, tempeh SME Sanan Chips has to create an innovation and conduct an improvement in order to be able to compete with other businesses. Due to existence of competition among the competitors with different brand of chips, so SME tempeh chips Sanan should improve properly the determination of marketing strategy. Strategy analysis can be conducted by using element of marketing mix. That triggers the necessity to conduct a research in terms of factors appealing marketing and measure how well a united element of marketing mix is performed according to the marketing strategy. After gaining information related to element of marketing mix from the questionnaire given to the SME tempe chips, then analysis is performed based on SWOT and QSMP to determine the major marketing strategy. According to the result, SME Sanan Chips should adopt the marketing strategy by: focusing on product diversity through producing various chips, launching a brand variant with a various pack and net weight in order to offer different choices to the consumers, developing an agent networks to expand the region of market sale, conduct promotion through exhibitions and major events in the Province of East Java, promoting the product intensively through a free advertisement and social media.
Flypaper Effect pada Dana Alokasi Umum (Dau) dan Pendapatan Asli Daerah (PAD) terhadap Belanja Daerah pada Kabupaten/Kota di Indonesia Diah Ayu Kusumadewi; Arif Rahman
Jurnal Akuntansi dan Auditing Indonesia Vol. 11 No. 1 (2007)
Publisher : Accounting Department, Faculty of Business and Economics, Universitas Islam Indonesia

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Abstract

The most important objective of decentralization by any means is to empower the regions and therefore the development would spread throughout the nation. However, some researches indicate that although decentralization has been implemented in Indonesia for almost a decade, the regions still strongly depend on the central government financially. This research examine the fly paper effect as one of the indicators of the success of decentralization. By examining all regions in Indonesia, the research try to find out (1) whether the General Allocation Fund and Regionally Original Income influence the regions’ spending; (2) between the General Allocation Fund and the Regionally Original Income, which one has more influence on the regions’ spending; (3) whether there has been a fly paper effect or not; and (4) whether the fly paper effect happened in the regions which have a high Regionally Original Income or in the other way. The important findings of this research indicate that all regions although have high Regionally Original Income, experienced the flypaper effect. Again, this result support the indication that the decentralization has not been successfully implemented in Indonesia.Keywords: DAU, PAD, fly paper effect, otonomi daerah
TOURIST INFORMATION CENTRE DI SEMARANG ARIF RAHMAN
IMAJI Vol 1, No 2 (2012): IMAJI
Publisher : Departemen Arsitektur, Fakultas Teknik, Universitas Diponegoro

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Abstract

Sebagai salah satu kota besar dan sekaligus Ibu Kota Jawa Tengah, Semarang juga memiliki perananpenting dalam proses pengembangan daerah pariwisata Jawa Tengah. Dengan adanya program-programpemerintah untuk lebih mengembangkan pariwisata Provinsi jawa Tengah di Kota Semarang. Perlunyaperencanaan sebuah Tourist Information Center provinsi Jawa Tengah di Kota Semarang untuk memfasilitasipenginformasian wisata dan mengembangkan potensi-potensi wisata dan budaya yang ada di Provinsi JawaTengah. Perancangan Tourist Information Center sebagai bangunan pelayanan publik dengan konsep one stoptourism centre (fasilitas terpadu), yang di dalamnya terdapat fasilitas pusat pelayanan informasi, ruang audiovisual, ruang serbaguna, gallery, perpustakaan gerai cendramata/souvenir, fasilitas pengembangan seni danbudaya serta guest house sebagai tempat istirahat atau menginap Kajian awal dilakukan dengan mempelajari tentang tinjauan Tourist Information Centre yang dimulaidari pengertian pariwisata, pengertian Tourist Information Centre, kemudian tinjauan khusus mengenaiPariwisata Jawa Tengah dan Tourist Information Centre Provinsi Jawa Tengah di Semarang, tinjauan umummengenai Kota Semarang, tinjauan perancangan tapak, tinjauan tentang Arsitektur modern, serta studibanding di beberapa Tourist Information Centre di Jawa Tengah. Dasar-dasar pendekatan perencanaan danperancangan meliputi pendekatan aspek fungsional, kontekstual, teknis, kinerja, dan arsitektural. Pemilihantapak dilakukan dengan matriks pembobotan pada 2 tapak alternatif untuk Tourist Information Centre yangdirencanakan. Sebagai kesimpulan, luaran program ruang yang diperlukan, serta gambar perancangan arsitekturdua dimensi dan tiga dimensi sebagai ilustrasi desain
PENGARUH PEMBERIAN INFUSA DAUN SUNGKAI (PERONEMA CANESCENS) TERHADAP JUMLAH LEUKOSIT PADA MENCIT Arif Rahman; Gianda Putri Rengganis; Sintia Prayuni; Tiara Novita Sari; Puspa Dwi Pratiwi; Septa Pratama
JOURNAL OF HEALTHCARE TECHNOLOGY AND MEDICINE Vol 7, No 2 (2021): OKTOBER 2021
Publisher : Universitas Ubudiyah Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33143/jhtm.v7i2.1574

Abstract

ABSTRAK Sistem imun merupakan hal yang penting untuk melawan infeksi Virus. Di Indonesia banyak sekali tumbuhan yang mungkin memiliki efek imunostimulan bagi tubuh, salah satunya yaitu tumbuhan sungkai.. Penelitian ini bertujuan untuk membuktikan apakah infusa daun sungkai memiliki septa.pratama@gmail.com  aktifitas untuk meningkatkan leukosit pada mencit. 25 ekor mencit dibagi kedalam 5 kelompok. Kelompok 1 diberikan larutan NaCMC 1% sebagai kontrol negatif, Kelompok 2 diberikan suspensi stimuno dengan dosis 0.19mg/30 gBBmencit, Kelompok 3 diberikan infusa daun sungkai dengan konsentrasi 5%, Kelompok 4 diberikan infusa daun sungkai dengan konsentrasi 15%, Kelompok 5 diberikan infusa daun sungkai dengan konsentrasi 20%. Masing-masing Kelompok di beri perlakuan selama 7 hari dengan dosis 1xsehari. Parameter yang di ukur yaitu jumlah leukosit mencit  dan hasilnya di analisis menggunakan one way Anova dan uji lanjutan Bafferoni. Hasil yang diperoleh, infusa mengandung metabolit skunder Tanin, Fenol, Flavonoid, Terpenoid, Saponin, dan Alkaloid. Dari hasil Analisis Statistik di dapati perbedaan yang signifikan untuk kelima kelompok dengan p<0.05. Setelalah dilakukan uji lanjutan Bafferoni didapatkan bahwa terjadi perbedaan signifikan dengan p<0,05 untuk kelompok kontrol positif, infusa 15%, dan infusa 20% dibandingkan dengan kontrol negatif. Kemudian dibandingkan dengan kontrol positif hanya infusa 20% yang berbeda signifikan p<0.05 lebih banyak menghasilkan leukosit. Kesimpulannya, Infusa daun sungkai memiliki aktifitas sebagai imunostimulan Kata Kunci : Daun Sungkai, Imunomodulator, Infusa, covid-19 
PENGARUH PENGETAHUAN AKUNTANSI, PENDIDIKAN PEMILIK, OMZET USAHA, DAN MASA MEMIMPIN PERUSAHAAN TERHADAPPENGGUNAAN INFORMASI AKUNTANSI (STUDI EMPIRIS PADA UMKM DI KABUPATEN KAMPAR) Arif Rahman; Kamaliah Kamaliah; Adhitya Adhitya
Jurnal Online Mahasiswa (JOM) Bidang Ilmu Ekonomi Vol 1, No 1 (2018): Wisuda Februari 2018
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Ilmu Ekonomi

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Abstract

The purpose of this research was to identify and analyze about (1) The influence of accounting knowledge on the use of accounting information (2) The influence of owner education on the use of accounting information(3) The influence of business turnover on the use of accounting information and (4) The manager/owner’s length of time in managing on the use of accounting information. Population in this research is UMKM in Kampar district.. The method that used to the sample selection was purposive sampling method. The number of samples in this research were 117 respondents. The type of data used in this study is primary data.Data collection techniques used survey techniques by distributing questionnaires.Data analysis techniques used in this research was multiple linear regression analysis using Statistical Product and Service Solution (SPSS) version 22.0 for Windows as data processing software program.Results of hypothesis test using statistical t-test showed the significant value of accounting knowledge variable 0.000< 0.05, which means that H1accepted, the owner education variable 0.072> 0.05, which means that H2not accepted, business turnover variables 0.02< 0.05, which means the H3 accepted, and manager/owner’s length of time in managing variables 0.265 > 0.05 which means that H4not accepted.Keywords : micro small and medium enterprises, the use of accounting information , accounting knowledge, owner education, business turnover and manager/owner’s length of time in managing.
COMMUNICATION STRATEGY IN ENGLISH LANGUAGE LEARNING (AN ETHNOGRAPHY RESEARCH IN INTERNATIONAL SCHOOL OF AIScho BSD City) Arif Rahman
Jurnal Ilmiah Mandala Education (JIME) Vol 3, No 2 (2017): Jurnal Ilmiah Mandala Education (JIME)
Publisher : Lembaga Penelitian dan Pendidikan Mandala

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (341.364 KB) | DOI: 10.36312/jime.v3i2.155

Abstract

This study aims to examine how communication strategies in English language learninge emloyed by learners in SMP international as an effort to ensure that the messages are conveyed to the listener. Futhermor, this study inverstigates the uses of verbal communication strategy dan nonverbal communication strategy in language learning of international school students. This research conducted a qualitative approach with an ethnography method.  The data of 27 learners’ spoken speech were collected from observation by using audio recorder, field notes and unstructured interview. The data analisis were using performance analysis technique, a futher analysis based on actual speeches and linguistic behaviors.The analysis reveals that the learners employ communication strategies in English language learning consists of verbal communication strategy and nonverbal communication strategy. The finding futher shows that the learnes employ both communication strategies in terms of three reasons; the use of communication strategies as a systematic technique to convey certain messages that can assist students in improving their communication in the target language to convey language competence, and strategic competence