1,720,959 research outputs found
LEMBAGA KEUANGAN ISLAM NON BANK
Full text linkIslamic financial Institutions is an important instrument in the development of Islamic economy, where societys or countries can not ignore the need to establish institutions. As from 1991, the existence of financial institutions Shari'ah Indonesia such Islamic bank (BMI and BPRS) is as an alternative to banking institutions that are free from the practice of development money. Similar practices is followed by the Shari'ah nonbank financial institutions like shariah BMT, Takaful insurance, Shariah saving and loan Unit (USPS) and cooperative Boarding (Kopotren). Cooperative is a form of Islamic teaching experience which has a principle of helping, cooperation, mutual help and mutual needs among members, therefore, the cooperative is in accordance with the teachings of Islam in order to improve the welfare of society. Understanding between insurance Shari'ah with conventional insurance is not much different, except that the difference lies in the operation, because the Shari'ah insurance is based on the operational principles of the Shari'ah of Islam with reference to the Qur'an and Sunnah. On the other hand, insurance Shari'ah known as takaful is a cooperative effort of mutual protection and help among members of the public in the face of catastrophe and disaster Lembaga keuangan syari’ah merupakan instrumen penting dalam pembangunan ekonomi Islam, dimana masyarakat atau negara tidak dapat mengabaikan kepentingan untuk mendirikan lembagalembaganya. Terhitung sejak tahun 1991, keberadaan lembaga-lembaga keuangan syari’ah Indonesia sejnis bank syari’ah (BMI dan BPRS) sebagai lembaga perbankan alternatif yang bebas dari praktek pembangunan uang. Praktek serupa diikuti pula oleh lembaga keuangan syari’ah non bank syaria’ah sejenis BMT, Asuransi Takaful, Unit Simpan Pinjam Syari’ah (USPS) dan koperasi Pondok Pesantren (Kopotren).Koperasi merupakan salah satu bentuk pengalaman ajaran Islam yang memiliki prinsip tolong menolong, kerjasama, saling membantu, serta saling memenuhi kebutuhan diantara sesama anggota, oleh karena itu koperasi sangat sesuai dengan ajaran Islam dalam rangka meningkatkan kesejahteraan masyarakat. Pengertian antara asuransi syari’ah dengan asuransi konvensional tidak jauh berbeda, hanya saja perbedaan itu terletak pada operasionalnya, karena asuransi syari’ah adalah asuransi yang prinsip operasionalnya didasarkan pada syari’at Islam dengan mengacu pada Al-Qur’an dan Sunnah.Di sisi lain, asuransi syari’ah yang dikenal dengan istilah takaful merupakan usaha kerja sama saling melindungi dan menolong antara anggota masyarakat dalam menghadapi malapetaka dan bencana
PENGARUH ARUS TERHADAP STRUKTUR MIKRO DAN KEKERASAN LASAN JIS Z 3251 DF2A-350-R
Full text linkAbstrakDilakukan pengelasan dengan elektroda JIS Z 3251 DF2A-350-R dengan tiga variasi arus yaitu 120, 140 dan 160A. Pengelasan dilakukan satu lapis pada material baja karbon rendah. Setelah selesai pengelasan, spesimen langsung dicelupkan ke dalam air. Setelah mendingin kemudian spesimen dilakukan heat treatment dengan temperatur 1000 oC selama 10 menit kemudian dicelup dalam media coolant. Kemudian dilakukan uji kekerasan dan foto mikro. Hasil menunjukkan semakin tinggi arus maka akan semakin tinggi nilai kekerasan baik spesimen yang dicelup coolant maupun tidak. Kata kunci: SMAW, JIS Z 3251 DF2A-350-R, Coolant, Struktur Mikro dan Kekerasan AbstractWelding is done with JIS Z 3251 DF2A-350-R electrodes with three current variations 120, 140 and 160A. Welding is carried out in one layer on low carbon steel material. After welding, the specimen is immediately dipped in water. After cooling, then the specimens were heat treated with the temperature 1000 oC for 10 minutes then dipped in the coolant media. Then the hardness test and microstructure were carried out. The results show that the higher the current, the higher the hardness value whether or not the coolant is dyed. Keywords: SMAW, JIS Z 3251 DF2A-350-R, Coolant, Microstructure and Hardnes
EVALUASI HASIL HARDFACING ELEKTRODA HV 350 PASCA QUENCHING MEDIA AIR, COOLANT DAN OLI
Full text linkAbstrakTeknik hardfacing merupakan pengerasan permukaan dengan menambahkan unsur atau lapisan terertentu agar sifat logam induk menjadi lebih keras. Pada blade buldozer umumnya dikeraskan dengan memberikan lapisan hasil pengelasan dengan elektroda khusus. Elektroda tersebut memiliki sifat kekerasan yang tinggi, sehingga blade pada buldozer tidak cepat aus. Dalam penelitian ini akan dilakukan dua kali proses quenching. Pertama dengan menggunakan air ketika selesai proses pengelasan. Kemudian dilanjutkan dengan pemanasan kembali dalam tungku kemudian dilanjutkan dengan proses quenching dengan dua media yang berbeda yaitu oli dan coolant. Dari hasil yang penelitian didapatkan hasil kesimpulan, media coolant merupakan media yang paling optimal dalam meningkatkan kekerasan dari hasil hardfacing. Nilai kekerasan yang didapatkan dari hasil pencelupan dengan media coolant adalah sebesar 299,73 HV Kata kunci: Hardfacing, HV 350, Quenching dan Kekerasan AbstractHardfacing technique is surface hardening by adding certain elements or layers so that the nature of the parent metal becomes harder. On the bulldozer blade is generally hardened by giving a layer of welding results with special electrodes. The electrode has high hardness properties, so the blade of the bulldozer does not wear out quickly. In this research two quenching processes will be carried out. First by using water when the welding process is complete. Then proceed with reheating in the furnace then proceed with the process of quenching with two different media namely oil and coolant. From the results of the study concluded, coolant media is the most optimal media in increasing the hardness of the results of hardfacing. The hardness value obtained from the dyeing with coolant media is 299.73 HV Keywords: Hardfacing, HV 350, Quenching and Hardnes
Efek Variasi Suhu Larutan Media Pendingin Terhadap Lapisan Deposit Las Elektroda E7018/HV350 Pada Material Baja Karbon
Full text linkAbstrakPenelitian ini bertujuan untuk mengetahui fenomena kekerasan yang terjadi pada deposit hasil pengelasan. Pada penelitian ini dilakukan proses pengelasan secara multilapis dengan menggunakan dua elektroda yaitu HV 350 dan E 7018. Setelah selesai pengelasan kemudian spesimen dilakukan perlakukan panas dengan menggunakan dua variasi suhu larutan pendingin yaitu 15°C dan 30°C. Dari hasil uji keras diketahui bahwa suhu 15 °C terbukti menghasilkan kekerasan lebih tinggi jika dibandingkan dengan tanpa perlakuan (NT) maupun perlakuan panas dengan suhu 30°C. Kata kunci: HV 350, E 7018, suhu AbstractThis study aims to determine the phenomenon of hardness that occurs in deposits of welding results. In this research, a multi-layered welding process was carried out using two electrodes, namely HV 350 and E 7018. After the welding was finished, the specimens were treated with heat using two variations of the cooling solution temperature, 15 °C and 30 °C. From the results of hard tests it is known that the temperature of 15 ° C is proven to produce higher hardness when compared with without treatment (NT) or heat treatment with a temperature of 30 ° C. Keywords: HV 350, E 7018, temperatur
Karakteristik Sifat Mekanik dan Struktur Mikro Baja Karbon Sedang Paska Perlakuan Panas Tempering
Full text linkAbstrak Penggunaan baja karbon rendah banyak digunakan lebih disebabkan karena baja karbon rendah memiliki keuletan yang tinggi dan mudah di machining, tetapi kekerasannya rendah dan tidak tahan aus. Sifat mekanik material baja tersebut dapat diperbaiki dengan melakukan beberapa proses perlakuan, salah satunya yaitu perlakuan panas. Baja dapat dikeraskan sehingga memiliki ketahanan aus, peningkatan ketangguhan, dan nilai kekerasannya meningkat dengan inti yang tetap ulet. Penelitian ini dilakukan untuk mengetahui pengaruh variasi tempertur temper dan waktu tahan temper terhadap karakteristik sifat mekanik dan struktur mikro baja karbon sedang S45C paska temper. Temperatur temper yang terbaik adalah pada suhu antara 150oC sampai 250oC, dimana tidak terjadi penurunan nilai kekerasan yang signifikan dibandingkan dengan nilai kekerasan paska quenching. Dengan naiknya temperatur temper mengakibat daya tahan aus benda uji menjadi menurun Kata kunci: S45C, temper, temperatur, kekerasan, keausan Abstract Low carbon steel is a type of metal that is widely used because has high ductility and is easy to machining, but has low hardness and is not wear-resistant. The mechanical properties of the steel material can be improved by carrying out several treatment processes, i.e. heat treatment. By proper heat treatment, steel would have good wear resistance, increased toughness, and increased hardness values with a core that remains ductile. This study was conducted to determine the effect of variations in tempering temperatur and tempering time on the mechanical properties and microstructure characteristics of S45C medium carbon steel after tempering. The best tempering temperature is between 150oC to 250oC, where there is no significant decrease in hardness value compared to the post-quenching hardness value. Keywords: S45C, tempering, temperatur, hardness, wear resistanc
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Dispelling the Myths Behind First-author Citation Counts
Full text linkWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
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