1,721,501 research outputs found
A new approach to product development in Islamic finance
Full text linkThesis (S.M.)--Massachusetts Institute of Technology, System Design and Management Program, June 2009."September 2008." Title page has the copyright date of 1994.Includes bibliographical references.Islamic Finance is a banking sector which caters to the Muslim population's banking needs by complying with the Islamic financial law. In this research some of the most prevalent financial products in Islamic Finance are surveyed and various forms of Islamic asset securitizations (Sukuks) are studied. Two issues of Islamic asset securitizations (Sukuks) are analyzed in detail. This analysis involves determining how well Sukuks serve the needs of Islamic Finance customers and also their shortcomings. In order to develop more customer-need centric financial products in Islamic Finance a new product development template is proposed. This template is a step-by-step process of developing Islamic financial products and is derived from the best practices of product development in the engineering domain. This methodology aims to formalize and improve the product development process in Islamic Finance. As an illustration of the proposed template, a new product is developed for Islamic Finance using this template. This example illustrates how religious restrictions in Islamic Finance dictate the form and substance of financial products during their development.by Muhammad Rehan Tahir.S.M
USULAN PERENCANAAN PERAWATAN DAN PENJADWALAN HEAVY EQUIPMENT BULLDOZER DENGAN METODE RELIABILITY CENTERED MAINTENANCE (RCM) DAN AGE REPLACEMENT
Full text linkUSULAN PERENCANAAN PERAWATAN DAN PENJADWALAN
HEAVY EQUIPMENT BULLDOZER DENGAN METODE RELIABILITY CENTERED MAINTENANCE (RCM)
DAN AGE REPLACEMENT
MUHAMMAD REHAN REZKIMULIA
Program Studi Teknik Industri, Fakultas Sains dan Teknologi
Universitas Sultan Syarif Kasim Riau
Jl. H.R. Soebrantas No. 155 Km. 18 Simpang Baru Panam Pekanbaru
E-mail: [email protected]
ABSTRAK
Kajian ini bertujuan untuk mengetahui usulan perawatan dan memberikan penjadwalan perawatan terhadap unit heavy equipment bulldozer Caterpillar D7G Series 2 di PT Majalengka Sejahtera Utama. Penelitian pendahuluan yang telah dilakukan menemukan tidak ada jadwal pemeriksaan dan perbaikan mengakibatkan keterlambatan dalam penanganan unit yang dapat meningkatkan downtime. Metode yang digunakan untuk mendapatkan usulan perawatan yang terjadwal digunakan metode Reliability Centered Maintenance (RCM) dengan model Age Replacement. Sehingga ditemukan 11 komponen kritis yaitu Shaft dengan interval perbaikan 58 hari dan pemeriksaan 23 hari, Filter Hydraulic dengan interval perbaikan 104 hari dan pemeriksaan 18 hari, Air Filter dengan interval perbaikan 54 hari dan pemeriksaan 19 hari, Rod Cylinder dengan interval perbaikan 56 hari Jam dan pemeriksaan 13 hari, Gear Transmission dengan interval perbaikan 92 hari pemeriksaan 10 hari, Spark Plug dengan interval perbaikan 88 hari pemeriksaan 22 hari, Sprocket dengan interval perbaikan 83 hari pemeriksaan 9 hari, Fuel Filter dengan interval perbaikan 78 hari pemeriksaan 18 hari, Fuel Pump dengan interval perbaikan 69 hari pemeriksaan 14 hari, Piston dengan interval penggantian 67 hari pemeriksaan 22 hari, Dan Cutting Edge dengan interval perbaikan 60 hari pemeriksaan 17 hari, apabila usulan perawatan dan penjadwalan perawatan diimplementasikan dapat menurunkan total downtime sebesar 4,83%.
Kata kunci: Maintenance, RCM, Age Replacemen
Valorization of organic biomass through the production of active biopolymer film based on sodium caseinate, guar gum, and beeswax
No full textBoosting Food Packaging Sustainability Through the Valorization of Agri-Food Waste and By-Products
Full text linkThe environmental concerns associated with synthetic polymers have intensified the search for sustainable and biodegradable alternatives, particularly for food packaging applications. Natural biopolymers offer promising solutions due to their biodegradability, reduced environmental impact, and reliance on renewable resources. Among these, agri-food waste and by-products have gained significant attention as valuable feedstocks for polymer production, supporting a circular economy approach. This review critically examines the current status of biopolymers derived from plant, animal, and microbial sources, focusing on their physical and chemical properties and their application in food packaging. The findings underscore that the properties of plant- and animal-based biopolymers are heavily influenced by the source material and extraction techniques, with successful examples in biodegradable films, coatings, and composite materials. However, a critical gap remains in the characterization of microbial biopolymers, as research in this area predominantly focuses on optimizing production processes rather than evaluating their material properties. Despite this limitation, microbial biopolymers have demonstrated considerable potential in composite films and fillers. By addressing these gaps and evaluating the key factors that influence the success of biopolymer-based packaging, we contribute to the ongoing efforts to develop sustainable food packaging solutions and reduce the environmental impact of plastic waste
Folio
No full textContents are in Urdu and Punjabi onlyProfessor Dr Muhammad Rehan Siddiqui (Principal). before the content
Comparative influence of active PLA and PP films on the quality of minimally processed cherry tomatoes
No full textMinimally processed fruits and vegetables (F&V) are highly prone to oxidative deterioration and despite many efforts, no tangible solution has been found. Thus, this study was designed to evaluate the influence of antioxidant-releasing PLA (polylactic acid) and PP (polypropylene) films incorporated with orange peel extract (OPE) on the quality of cherry tomatoes during storage. Films were characterized based on color parameters, barrier properties and potential migration of volatile compounds from packaging into the food systems. The success of OPE encapsulation and molecular interactions between extract and polymeric chains was confirmed by FT-IR. The release analysis was performed in terms of DPPH radical scavenging activity and through GC-MS analysis (through liquid injection and SPME). Finally, the influence of the packaging material on the quality of cherry tomatoes was ascertained through oxidative enzyme activity and the production of volatile organic compounds. The effect of the extract on the oxygen permeability depends by the film. There was a significant difference (p < 0.05) in compounds that migrated from the control and active PLA films as observed through GC-MS. Finally, cherry tomatoes packed with active PLA films displayed more total polyphenolic content (TPC) retention and reduced volatile compounds (i.e., hexanal) at the end of storage as compared to PP films. Thus, active PLA films have the potential to be used as a replacement packaging material to PP for cherry tomatoes
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
Study on the Properties of PLA- and PP-Based Films for Food Applications Incorporating Orange Peel Extract from Agricultural by-Products
Full text linkThe aim of this work was to develop active packaging based on polypropylene (PP) and polylactic acid (PLA) matrices using a high value by-product extracted from orange peel as an active compound for food packaging applications. Different films with and without orange peel extract (OPE) based on PP and PLA were obtained via cast extrusion and characterized in terms of their mechanical, thermal, optical, and sealing properties. The films obtained were transparent, but when OPE was incorporated, the transmittance spectrum decreased, causing slight coloration. Mechanical properties were affected by the incorporation of OPE, as elongation at break and tensile strength increased in the cross-direction of the PP film, although the main differences found were related to the polymer itself. In addition, sealing strength also increased via the incorporation of OPE in the PP matrix. However, thermal properties were not affected by OPE in the PP matrix but slightly decreased stability in PLA. Regarding antimicrobial activity in in vitro studies, no inhibition of the growth of Listeria innocua, Saccharomyces cerevisiae, Aspergillus niger, or Escherichia coli was observed. Finally, antioxidant activity was observed in in vitro studies with 2,2-Diphenyl-1picrylhydrazyl (DPPH) radical. The results of this study showed that the obtention of materials with OPE incorporated into the PLA and PP matrix is feasible. The new materials obtained can be used for applications of oxidation-sensitive fresh products
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