798 research outputs found
Probing the potential of Al2CO/SiC heterostructures for visible light-driven photocatalytic water splitting using first-principles strategies
No full textPhotocatalytic water splitting is a sustainable and eco-friendly method for renewable energy production. The development of an efficient photocatalyst based on two-dimensional (2D) heterostructures with suitable band offsets is at the heart of relevant research activities. In this work, we predict a novel 2D heterostructure of Al2CO and SiC based on first-principles calculations of the structural, electronic, optical, interfacial, and photocatalytic mechanisms. The results indicate that AB stacking of the interface is energetically more favorable with a direct band gap of 2.27 eV. The interface exhibits strong covalent interaction, straddling-type band alignment, and suitable redox potentials for water splitting. Owing to their exceptional stability, the findings based on the work function revealed an efficient charge transfer mechanism due to the internal electric field. Furthermore, the optical properties of the structure indicate strong light harvesting ability in visible and ultraviolet regions. The findings suggest that the proposed heterostructure offer suitable band edge positions for hydrogen and oxygen evolution reactions. The mechanisms of water splitting, hydrogen and oxygen production are examined to explore the prospects of overall water splitting. Three fundamental steps—Volmer, Heyrovsky, and Tafel—are investigated to study the hydrogen evolution reaction (HER) activity. The screening of whole reaction pathways for oxygen production exhibited low theoretical overpotential and enhanced catalytic efficiency. This study demonstrates that the Al2CO/SiC heterostructure is a promising material for overall water splitting in various pH ranges under visible light irradiation
Politics and Exhaustion — with Asad Haider
No full textTheorist and author Asad Haider joins Below the Radar to discuss questions he explores in his book, Mistaken Identity: Race and Class in the Age of Trump. Asad discusses how class dynamics cannot be separated from identity-driven movements. As well, he explores ideas of political exhaustion in the tradition of political theorists such as Sylvain Lazarus and Alain Badiou. In this interview, Asad interrogates the role of identity in politics and how it has been taken up in discourse — complicating the relationship between race and class in a context that has been defined by capital interests. Asad and Am discuss theoretical questions around frameworks for political organizing and solidarity across movements. He also speaks to our current moment as one of political exhaustion, where it\u27s difficult to mobilize transformative political change
Hydraulic simulations to evaluate and predict design and operation of the Chashma Right Bank Canal
No full textIrrigation systems / Irrigation canals / Flow control / Velocity / Canal regulation techniques / Hydraulics / Simulation models / Design / Operations / Crop-based irrigation / Distributary canals / Water delivery / Policy / Protective irrigation / Water allocation / Water requirements / Sedimentation / Water distribution / Equity / Water conveyance / Pakistan / Chashma Right Bank Canal
A critical analysis of Persian Poetry of Shah Turab Ali Qalandar
No full text<p>volume = {1}, number = {1}, author = {Zunnoorain Haider Alavi}, title = {A critical analysis of Persian Poetry of Shah Turab Ali Qalandar}, publisher = {Saurabh Chandra}, journal = {SOCRATES}, ISSN 2347-6869 year = {2013}</p
Pioneers of Library Movement in Pakistan
No full textThe paper aims to describe in brief the contribution of seven leaders of Pakistan librarianship, viz. K.B. Khalifa M. Asadullah, Prof. Dr. Abdul Moid, Dr. Abdus Subuh Qasimi, Muhammad Shafi, Fazal Elahi, Khawaja Nur Elahi and S. V. Hussain. The early library developments are given for better understanding of the role of these leaders
Community-based intervention packages for reducing maternal morbidity and mortality and improving neonatal outcomes
No full textA large proportion of maternal and newborn deaths and diseases can be addressed by developing a community-based approach to improved maternal care during pregnancy, delivery and after delivery, as well as care of the newborn. A systematic review found 27 experimental and non-experimental trials evaluating the health impacts of community-based intervention packages, in which health workers received additional training in maternal and newborn care. Women in areas assigned to receive a community-based intervention package had fewer illnesses and complications during pregnancy and birth, and their babies were more likely to survive. Referrals rates to health facilities for pregnancy-related complications and initiation of breastfeeding within an hour of birth also improved. This review offers encouraging evidence of the value of integrating maternal and newborn care in community settings through a range of strategies, many of which can be packaged effectively for delivery through community health workers.Zohra S. Lassi, Batool A. Haider, Zulfiqar A. Bhutt
Daily contact with a patient and poor housing affordability as determinants of pulmonary tuberculosis in urban Pakistan
No full textAbstractObjectiveThis study aimed to evaluate the factors associated with pulmonary tuberculosis (TB) among individuals aged 15years or more in urban Karachi, Pakistan.Design and settingA case–control design was implemented in three major tertiary-care hospitals to select cases (n=342) with active pulmonary TB (i.e. two sputum smears positive for Mycobacterium tuberculosis with clinical and radiographic evidence of current pulmonary TB and diagnosed between August 2002 and October 2003. Selected controls (n=342) were surgery patients from the same hospitals at time of recruitment of the cases, without clinical and radiographic evidence of pulmonary TB.ResultsMultivariable logistic regression model showed that daily contact with a pulmonary TB patient (adjusted odds ratio [ORadj])=5.07; 95% CI: 3.31, 7.78), and poor housing affordability (i.e. rented vs. owned) (ORadj=1.59; 95% CI: 1.13, 2.26) were significantly associated with pulmonary TB status. The overall adjusted summary population attributable risk (%) for both the risk factors together was 38.7.ConclusionReaching out to underprivileged TB patients for delivery of DOTS and focused education of patients and their contacts about M. tuberculosis transmission mode may substantially minimize pulmonary TB risk in this and similar settings
Faisal Javed measures the height and weight of a child at a private school in Karachi.
No full text<p>Photo Courtesy: Haider J Warraich.</p
Children line up for measurements and interviews at a government-run public school in Karachi.
No full text<p>Photo Courtesy: Haider Warraich.</p
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