82 research outputs found
Analysis and Simulation of Fuel Consumption and Emissions in a Heavy-Duty Diesel Truck under Real-world Driving Conditions for Hybridization and Waste Heat Recovery
No full textHeavy-duty vehicles contribute significantly to global greenhouse gas emissions and are now facing challenges in meeting emission regulatory standards, particularly cold-start operations. These challenges are particularly significant during transient operations, where fuel efficiency drops and emissions peak due to suboptimal thermal conditions. Advanced powertrains that use hybridization and waste heat recovery with phase-changing materials offer potential pathways to mitigate fuel consumption and emissions under real-world driving conditions. Still, they need to be accurately sized, and the energy flows handled to overcome the disadvantages of increased mass and complexity. This investigation lays the groundwork for the development of advanced power systems by implementing a scalable, map-based model for heavy-duty diesel engines. The model is validated using an open-access dataset related to a heavy-duty vehicle equipped with a 6-cylinder diesel engine, which performed 28 different trips on the same route with the same driver. The trips are executed with three different payload values and contain both cold-start and hot-start operating conditions. The validation is based on quasi-static modeling of the vehicle powertrain. The proposed model can accurately predict fuel consumption and CO2 emissions for all trips, with an average relative error of 2.4%. The results of the investigation also include preliminary sizing and analysis of a hybrid electric configuration that exploits the synergy between hybridization and waste heat recovery. In comparison to the original powertrain, the proposed powertrain resulted in a roughly 15% reduction in fuel consumption and a 37.5% increase in exhaust temperature. These findings demonstrate the potential for integrated hybrid and waste heat recovery systems to enhance fuel economy in heavy-duty transportation while supporting compliance with emission regulations
Preliminary Design and Assessment of a Waste Heat Recovery System for a Hybrid-Electric Heavy-Duty Vehicle
No full textManahij Tafsir Tabi'in Mujahid Bin Jabar Dan Penafsirannya
No full textAbstrakTulisan ini mencoba melakukan eksplorasi terhadap karya tafsir tabi’in, Muja>hid bin Jabar. Dalam mengindentifikasi keberadaan tafsir Mujahid, paling tidak terdapat dua sumber penafsiran yang digunakan pengarang dalam menafsirkan al-Qur’an; (1) sumber bi al-ma’tsur, yakni berdasarkan pada penjelasan al-Qur’an sendiri, berdasarkan hadis Nabi, pendapat sahabat, dan israiliyyat; (2) sumber bi al-ra’yi, yakni berdasarkan ijtihad sang mufassir. Sementara dalam menjelaskan al-Qur’an, metode yang diusung Mujahid adalah metode ijmali, yakni menafsirkan ayat al-Qur’an dengan bahasa yang ringkas, padat, dan tidak panjang lebar. Di samping itu, Mujahid juga menggunakan metode muqaran meskipun hanya relatif sedikit. Untuk corak penafsirannya, tafsir Mujahid tidak sampai pada corak disiplin ilmu tertentu, hanya sebatas kental dengan nuansa penafsiran dari gurunya – Ibn ‘Abbas, meskipun dalam beberapa penafsiran terdapat corak fiqhi dan kalami dengan kapasitas yang sangat sedikit. AbstractThis paper tries to explore the work of tafsir tabi’in, Mujahid bin Jabar. In identifying the existence of Mujahid, interpretation there are at least two sources of interpretation used by the author in interpreting the Qur’an; (1) the source of bi al-ma’tsur, that is based on the Qur’an’s own explanation, in addition to the prophetic traditions, opinions of prophet’s companion, and also israiliyyat (2) the source of bi al-ra’yi, based on the ijtihad of the interpreter. While in explaining the Qur’an, the method that Mujahid carried is the ijmali method, which is to interpret the verses of the Qur’an in a brief language, solid, and not lengthy, also using the muqaran method although only slightly. For his interpretive style, Mujahid’s interpretation does not extend to any particular discipline, only limited with the feel of interpretation of his teacher – Ibn ‘Abbas, although in some interpretations there is a fiqhi and kalami pattern with very little capacity
Timeless College Tales
No full textAt the elite Saeed School of Business, where the cream of the city\u27s student population flock for further education, Professor Madeeha rules the roost with her wisdom and wit, both inside and out of the classroom .
From the tangled webs of loves triangles to the wisdom of work from classical antiquity, author Nadya Chishty-Mujahid creates a world of the heady and intoxicating college experience bubble that is alive with the richness of her professional experience as a celebrated teacher at the Institute of Business Administration (IBA Karachi).
Turn the pages to step into the shoes of young students maneuvering the fierce fights, fiery feelings and fun that is intrinsic to the beauty of the college experience.
These stories will reflect back at you Aristotle\u27s words, \u27\u27Educating the mind without educating the heart is no education at all.\u27\u27https://ir.iba.edu.pk/faculty-research-books/1051/thumbnail.jp
Measurement of time-resolved plasma parameters in an active screen plasma nitriding system
No full textFROM MARW TO THE THUGHUR: IBN AL-MUBARAK AND THE SHAPING OF A BIOGRAPHICAL TRADITION
No full textThe article focuses on the figure of a renowned Sunni scholar, the muhaddith and mujahid Ibn al-Mubarak (d. 797), author of the Kitab al-Jihad, one of the first work on the issue. His biographical profile is analyzed examining the tendency of the later biographical sources to credit him as one of the founding fathers of Sunni identity and as a model of ethics and behaviour combining zuhd and jihad
Identity in context: Reflections on research with refugees
No full textThis reflective article considers the author’s recent research with Syrian refugees. The author considers his identity and experiences of being different, before describing how this benefitted the research context and how this context was potentially therapeutic
Estimation of Distribution of Income in Pakistan, Using Micro Data
No full textIncome distribution entered the post war discussion of economic development fairly late. Until the 1960s much of the focus was on industrialisation and the need for capital accumulation. Pakistan was no exception as in the early 60s economic expansion became the main target and means to political identity. Rapid population growth associated with steep decline in mortality demanded acceleration of production to keep pace. Overall aggregate expansion was much faster than before but without benefit for the poor. In that context emerged a new professional interest in income distribution. Haq’s (1964) study was one of the oldest studies conducted to measure inequality in personal income distribution in the high income brackets in the urban areas of Pakistan. The main objective of the author was to present the income distribution pattern in terms of the relative shares of different income groups as well as in terms of Pareto coefficients and concentration ratio during the period 1948-49 to 1957-58 for which published tax data was available. While recognising the limitations of the data used, the author went on to calculate various measures of income inequality including Pareto coefficient and Lorenz curve. The author also made comparison of Pakistan’s income distribution with U.S.A. and U.K.
Non-thermal dielectric barrier discharge (DBD) plasma affects germination of coffee and grape seeds
No full textEsoteric-orientalist elements in Jane Austen\u27s Northanger Abbey: the nexus of gothic and cultural studies
No full textA significant work that directs readers to re-examine the classic texts and tropes of Austen’s novel, Northanger Abbey, Orientalist sub-fields of Cultural studies, and intriguing aspects of the Tarot in a postmodern context. The author directs students and scholars to examine neglected aspects of academia.https://ir.iba.edu.pk/faculty-research-books/1033/thumbnail.jp
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