369 research outputs found
Environmental and economic assessment of closed-loop supply chain with remanufacturing and returnable transport items
No full textDevastating environmental impacts of supply chain(s) (SC) have resulted in government legislation, customer awareness, and pressure from various stakeholders to implement environmentally sustainable strategies in SC. The most important objectives of the sustainable supply chain management (SCM) are enhancement of value creation over product life-cycle by reuse and considerations of environmental impacts. Environmental issues arising from manufacturing and logistic operations affect the economic growth as well as sustainability of the SC which must be considered during policy making. To achieve the economic goals and to improve the sustainability of SC, this paper proposes a multi-echelon closed-loop supply chain (CLSC) model with a third party logistics (3PL) that provides transportation and collection services. The proposed model investigates environmental impacts from production and transportation in a hybrid manufacturing-remanufacturing system which uses returnable transport items (RTI) for product transportation. Objectives of the model are to study the impacts of transportation and carbon emission costs in a hybrid CLSC, and to devise best RTI management policies under the influence of these costs. The developed mathematical model falls under the category of mixed-integer non-linear programming (MINLP) problems, for which an improved solution methodology has been proposed. The total cost is minimized with simultaneous optimization of container capacity, required number of containers, shipment sequence of retailers, cycle time, and remanufacturing rate. Robustness of the model is illustrated through a numerical example with five different cases, graphical representations, and sensitivity analysis. Results prove that ignoring these factors not only produce negative environmental impacts but also lead to non-optimal solutions and ultimately cause huge economic loss
Bibliometric Review of Mehran University of Engineering & Technology Research Journal: 2011-2018
No full textAim: The aim of this study is to evaluate the bibliometric indicators of articles published in Mehran University of Engineering & Technology Research Journal (MUETRJ) during the period of 2011-18.
Methodology: The data of publications published in MUETAJ was downloaded from website of e-journal and analyzed various bibliometric attributes during July 2017 to 15th January 2018. The pattern of authorship, gender-wise distribution of first author, page-length of articles and institutional affiliation of the first author of publications were calculated and analyzed. Microsoft Office Excel spreadsheet was prepared for data analysis.
Results: Total 582 articles published in 32 issues of 8 volumes during the projected period with average of 18.1% articles per issue and 72.75 articles per year. Total 1777 authors contributed with an average of 3 authors per article in MUETRJ. A gender-wise distribution showed that number of male authors were much higher (n=1551; 87.2%) as compare to females authors (n=226; 12.7%). A majority of articles were written by multi-authored (n=570; 97.3%) as opposite to single author (n=12; 2%). Most the articles (n=140; 24%) have 10 pages length followed by 8 pages length (n=136; 23.7%). It was observed that Mehran University of Engineering & Technology presented itself as major contributor with 258 articles (44.3%).
Conclusion: The participation of 96 national and international institutes related to engineering and technological sciences in publishing research papers shows their confidence in MUETRJ
Pathogen simulation using soil and water tool (SWAT) model and bacteroides source tracking technique
No full textThe Upper Salem River Watershed (USRW), located in southern New Jersey, is listed as impaired for pathogens by The New Jersey Department of Environmental Protection (NJDEP) (NJDEP 2011). A 2003 Total Maximum Daily Load (TMDL) for the watershed recommended the use of pathogen source tracking to identify pathogen sources and develop a quantitative model to simulate pathogen pollution in the watershed (NJDEP 2003). This research comprises three parts: a) Fecal coliform and E. coli simulation using the Soil and Water Assessment Tool (SWAT) model in the USRW; this is the first study to conduct sensitivity analysis, calibration and validation of the SWAT model for two widely used pathogen indicators for multiple sampling stations in one watershed. The results of the sensitivity analysis indicate that pathogen input is the most sensitive parameter in the simulation of both indicators. Fecal coliform and E. coli simulation at five of six sampling stations generally showed good calibration and validation based on Nash-Sutcliffe efficiency values (0.04 to 0.71). b) Investigation of temperature effects on the persistence of bovine-Bacteroides; the primary goal of this part of the research was to identify the decay rate of bovine- Bacteroides in stream water at 4°C, 20°C and 30°C. The decay constant of bovine-Bacteroides was calculated between 0.01 h-1 in the mesocosm incubated at 4°C to 0.05 h-1 in the mesocosm at 30°C. Comparison of this study with other similar studies indicates that as temperature increased, a greater discrepancy in compared constant values was observed. c) Pathogen source tracking was done using a multiple linear regression analysis in the USRW. The primary goals of this research phase were to use a bovine-Bactreroides source tracking technique to investigate if bovine feces are a contributing pathogen source to the river system and to identify the spatial distribution of bovine pathogen discharge to the USRW. The results of the simulated model showed agreement with the potential bovine distribution sources (i.e., animal feeding facilities). A probability of occurrence map of bovine derived pathogens was also developed to spatially identify which sub-watersheds have greater likelihood of pathogen contributions from bovine sources.Ph. D.Includes bibliographical referencesby Mehran Niaz
ASO Author Reflections: Transdiaphragmatic Approach for Simultaneous Resection of Colorectal Liver and Lung Metastases
No full textSimultaneous resection of colorectal cancer, liver and lung metastase
مسافر : Mosafer (the Traveller)
No full textThis thesis poses questions about the preservation of culture and language amongst generations of Iranian immigrants living in North America. It investigates the socio-cultural implications of hybridity as they relate to interethnic exchange and the globalizing process of travel and translation. Working with notions of “third space” or “the space in-between” (Clifford,1992; Bhabha, 1994) and Farzad Sharifian’s research on the globalization of English (2012), this work explores how the use of the hybrid language Persian-English affects an Iranian sense of identity in a globalized world. Susan Stewart’s discussion on the agency of objects to generate narratives which are central to a cultural experience (1993) is discussed as it applies to the use of objects in the artworks being examined in this paper. An analysis of several contemporary autoethnographic works from recent art history, such as Mona Hatoum’s Measures of Distance (1988), Zineb Sedira’s Mother Tongue (2002), and Ala Ebtekar’s Elemental (2004), is used to form a basis for a discussion of hybrid identity and how inherited language can complicate cultural exchange. The artistic projects that come out of this research are Ma Miaeem va Miravim (We Come and Go), 2016, and Soghat (Souvenir), 2017. Ma Miaeem va Miravim (We Come and Go) is an artist book based on the first-grade English book, We Come and Go (1954), which employs a hybrid translation of Persian-English—in which Persian words are written using the Roman alphabet. Soghat (Souvenir) is a series of sculptures made from everyday objects and string, which investigates how culture travels through objects. These artworks are discussed to explore ways in which meaning can be lost, gained, or altered, through the substitution of signifiers and the co-mingling of cultures
Book Review: Troubled Waters: Insecurity in the Persian Gulf, Mehran Kamrava (Cornell U. Press 2018)
No full textWhile the Persian Gulf region is no stranger to turmoil, recent developments have focused on Qatari citizens and residents who have been living under diplomatic and economic sanctions imposed by Saudi Arabia, the United Arab Emirates, Bahrain, and Egypt. This blockade of Qatar on June 5, 2017, is another example of the persistent instability of the Persian Gulf region, and proves the need for an answer to the central premise of Troubled Waters: Insecurity in the Persian Gulf, which is posed in the first line of the Introduction: “Why is the Persian Gulf so chronically insecure?” (p. 1).
Author Mehran Kamrava’s extensive expertise in Middle Eastern politics proves invaluable in the analysis of the “troubled waters” of the Persian Gulf. The book focuses on factors contributing to ongoing conflict and instability in the region. It was against the backdrop of the blockade of Qatar and the use of—for the first time in the Arab Gulf region—cyber warfare, Twitter bot armies, and a misinformation campaign designed to create a narrative about Qatar’s role in financing terrorism, that I began reading the book
Impact of transportation and carbon emissions on reverse channel selection in closed-loop supply chain management
Full text linkRemanufacturing has gained significant attention as a way to combat global warming and natural resource depletion due to its potential environmental and economic benefits. However, transportation and logistics activities in the reverse supply chain, a critical component of the closed-loop supply chains (CLSC), have been largely overlooked by both academics and businesses. This work aims to bridge the gap by mapping the impacts of transportation distances and costs on the environmental and economic performance of CLSC management. We develop a hybrid manufacturing–remanufacturing model under different reverse-channel structures and examine the relationships between transportation distances and costs, the remanufacturing rate, the optimal reverse channel, and the net emissions of the system. The results show that the optimal remanufacturing rate decreases with an increase in transportation distances of the reverse supply chain only, and forward distance has no impact on the remanufacturing rate. However, increasing market demand reduces the impacts of long reverse distances. Furthermore, the cost of transportation also affects the remanufacturing rate. We also found that increasing remanufacturing rate increases total emissions due to higher reverse transportation distances.</p
Lungs Cancer Detection Using Digital Image Processing Techniques: A Review
No full textFrom last decade, lung cancer become sign of fear among the people all over the world. As a result, many countries generate funds and give invitation to many scholars to overcome on this disease. Many researchers proposed many solutions and challenges of different phases of computer aided system to detect the lung cancer in early stages and give the facts about the lung cancer. CV (Computer Vision) play vital role to prevent lung cancer. Since image processing is necessary for computer vision, further in medical image processing there are many technical steps which are necessary to improve the performance of medical diagnostic machines. Without such steps programmer is unable to achieve accuracy given by another author using specific algorithm or technique. In this paper we highlight such steps which are used by many author in pre-processing, segmentation and classification methods of lung cancer area detection. If pre-processing and segmentation process have some ambiguity than ultimately it effects on classification process. We discuss such factors briefly so that new researchers can easily understand the situation to work further in which direction
052 - AJ Joseph Brown
No full textThis poster was presented at the 2017 Annual Graduate Student Showcase and received an honorable mention for the "Greatest Minds In Research" award.Includes bibliographical references.Global salinization of irrigated lands results in a $12 billion (US) reduction in global crop production annually. A joint effort between Utah State University, Colorado State University, and Mehran University in Pakistan aimed to investigate the impacts and movement of salts in agronomic systems, and identify common solutions. This was done through water and soil monitoring in Southeast Colorado in a surface irrigation setting. Results indicated that salts are loaded onto fields because of saline water, and get trapped in root zones by shallow water tables. The added salt decreases osmotic potential in soil, making root water uptake more difficult.Great Minds in Research - Honorable Mention
Information/Experience center: Prelude to the landscape
No full textArchitecture, Urbanism and Building Science
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