181 research outputs found
Factional federalism, state capacity, and fiscal constraints: Pakistan's COVID-19 challenges
Full text linkAs Covid-19 spreads across Pakistan, Hassan Javid, Sameen M. Ali, and Umair Javed (Lahore University of Management Sciences, Pakistan) explain how the country's ability to effectively deal with the virus will be impeded by tensions between the central and provincial governments, a lack of state capacity, and fiscal constraints
How can I jump this queue? Petty corruption, clientelism, and other games within the rules
No full textHow can I jump this queue? Petty corruption, clientelism, and other games within the rules
No full text
Effect of confinement on the decay of vortex ring
No full textThe effect of confinement on the decay of vortex ring is studied computationally using Lattice Boltzmann Method. An Initial vortex ring, introduced inside a wall bounded cubical domain, is let to evolve and its decay is noted in terms of maximum vorticity at the core and the total kinetic energy inside the domain. The study shows distinct regimes of decay in all cases of confinement ratios(ratio of vortex ring diameter to length of the cubical domain)
An Analytical Criterion for Centrifugal Instability in Non-Axisymmetric Vortices
No full textNon-axisymmetric vortices are ubiquitous in nature; examples include polar vortices in planets, the giant red spot in Jupiter, tornadoes and cyclones on Earth, mesoscale eddies in the ocean. Turbulent flows are furthermore known to be dominated by small- and large-scale vortex structures. Owing to the wide range of applications, knowledge of conditions under which a given vortex becomes unstable is beneficial. Here, the centrifugal instability of two-dimensional, non-axisymmetric vortices in the presence of an axial flow and a background rotation is studied using the local stability approach. The local stability approach, based on geometric optics and similar in formulation to the rapid distortion theory \cite{bib:godeferd2001}, considers the evolution of shortwavelength perturbations along streamlines in the base flow. This approach, developed by Lifschitz Hameiri \cite{bib:lifschitz1991}, is particularly useful for base flows for which a global stability analysis is computationally expensive. A sufficient criterion for centrifugal instability in an axisymmetric vortex with and is first derived by analytically solving the local stability equations for wave vectors that are periodic upon evolution around a closed streamline. This criterion is then heuristically extended to non-axisymmetric vortices and written in terms of integral quantities on a streamline. The criterion is then shown to be accurate in describing centrifugal instability over a reasonably large range of parameters that specify Stuart vortices and Taylor-Green vortices
EdJAM Pakistan Children’s Series – Beautifully illustrated stories of historical and contemporary figures
No full textThe EdJAM Children’s Series focuses on historical and contemporary figures and events that have been left out or silenced in mainstream textbooks and curricula in Pakistan. Undergraduate students and illustrators were hired to work together to develop each script and illustration. Students engaged in research over the months of July and August 2021 to produce the narratives that have been illustrated by 6 early-career female artists of Pakistan. These illustrations are in English, Urdu, Sindhi and Balochi. They are designed for children, helping parents and teachers talk about topics related to identity(s), rights and the environment.Objective: The EdJAM Children’s Series has been designed to highlight historical and contemporary figures and stories that are left out of the traditional curriculum in Pakistan. These booklets provide a starting point for conversations with children (and teenagers) about the diverse histories and experiences of women, religious and ethnic minority groups, and pertinent issues such as land rights, and environmental changes taking place in Pakistan.The Team: The booklets are a collaboration between university undergraduate students, and 6 early career female artists. The students include Anusheh Azhar, Shamim Bano, Wasib Iftikhar, Emaan Jafer, Zoha Batool Khan, Nayab Wali Khan, andSanha Tahir. The artists include Mahliqa Baloch, Areeba Haseeb, Emil Hasnain, Bushra Saleem, Tooba Shahbaz and Rida Zaidi.The project was led by EdJAM’s Pakistan Co-I’s Dr. Tania Saeed and Dr. Sameen Mohsin Ali.The Process: Students and Artists were paired together to work on a topic of interest. The students conducted research during the summer months of 2021. Primary and secondary research was undertaken, including interviews with members of different religious and ethnic minority communities, trans communities, activists, politicians and NGO workers. Students drafted scripts, which were then developed into illustrations by the artists.<br/
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