154 research outputs found
Theory of Optimal Taxation and Current Tax Policy in Pakistan’s Agriculture
Full text linkpublic finance into the mould of classical welfare economics by emphasising minimisation of dead weight losses resulting from the imposition of a tax or faulty tax structure. As such, these modern theories have much in common with the traditional approach in terms of efficiency and equity. In spite of this, however, the differences remain. For example, the former theories adhere strictly to the norms of classical welfare economics which treats individual consumers as utility maximisers where improvements in welfare involve change that makes one individual better-off without making someone else worse-off [Stern (1987)]. In contrast to the emphasis of traditional theories on lump-sum taxes, the optimum tax literature is concerned with the implication of using non-lump-sum taxes which have a wider range and therefore more useful to the policy-maker. The recent work on normative tax theory looks at the impact of taxation on individual decisions and the trade off between raising revenues or redistributing tax burdens and the efficiency losses [Atkinson (1987)]. Finally, the optimal tax literature may be more pragmatic in its approach than traditional works as it realistically deals with government objectives and constraints and combines them into models that are sufficiently rich to allow for differences between people regarding income and expenditure patterns.
Toxicity and Avoidance Behaviour of Coccinella septempunctata (Coleoptera: Coccinellidae) Against Deltamethrin
No full textIn the present study we conducted residual bioassay tests to evaluate the susceptibility of Coccinella septempunctata to the recommended field dose of deltamethrin (i.e., 50mL of insecticide dissolved in 200mL). We also studied the insecticide avoidance behaviour of C. septempunctata. Studied population was found susceptible to the recommended dose of deltamethrin as we observed 100% mortality after 24 hours of insecticide exposure. Results of Fisher exact test revealed a significant difference in mortality at different time intervals. C. septempunctata learned to avoid deltamethrin treated leaf surface after their repeated exposure to the same insecticide
Design of LDPC Codes: A Survey and New Results
Full text linkThis survey paper provides fundamentals in the design of LDPC codes. To provide a target for the code designer, we first summarize the EXIT chart technique for determining (near-)optimal degree distributions for LDPC code ensembles. We also demonstrate the simplicity of representing codes by
protographs and how this naturally leads to quasi-cyclic LDPC codes. The EXIT chart technique is then extended to the special case of protograph-based LDPC codes. Next, we present several design approaches for LDPC codes which incorporate one or more accumulators, including quasi-cyclic accumulatorbased codes. The second half the paper then surveys several
algebraic LDPC code design techniques. First, codes based on finite geometries are discussed and then codes whose designs are based on Reed-Solomon codes are covered. The algebraic designs lead to cyclic, quasi-cyclic, and structured codes. The masking technique for converting regular quasi-cyclic LDPC codes to irregular codes is also presented. Some of these results and codes have not been presented elsewhere. The paper focuses
on the binary-input AWGN channel (BI-AWGNC). However, as discussed in the paper, good BI-AWGNC codes tend to be universally good across many channels. Alternatively, the reader may treat this paper as a starting point for extensions to more advanced channels. The paper concludes with a brief discussion of open problems
Prevalence of obstructive sleep apnoea syndrome in oncological patients: A systematic review and meta‐analysis
No full textBackground: Obstructive sleep apnoea syndrome (OSAS) has garnered increasing attention in recent years due to its potential association with cancer. This systematic review and meta-analysis aimed to assess the prevalence of OSAS in cancer patients through a comprehensive analysis of existing literature. Methods: This systematic review and meta-analysis, conducted in accordance with the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) protocol, aimed to evaluate the prevalence of OSAS in cancer patients. A comprehensive search of electronic databases was performed to identify relevant studies published up to September 2021. Eligible studies reporting on the prevalence of OSAS in cancer patients, encompassing various study designs, were included in the analysis. Pooled estimates of the odds ratios (OR) with 95% confidence intervals (CIs) were calculated using a random effects model. Heterogeneity among the studies was assessed using the I2 statistic. Results: Seventeen studies fulfilled the inclusion criteria and were subsequently included in the review. The prevalence of OSAS in cancer patients was estimated to have an overall OR of 0.80 (95% CI: 0.75–0.85). In comparison with non-cancer patients, cancer patients had a statistically significant greater risk of OSAS, as indicated by the total estimated RR for the prevalence of OSAS in cancer patients, which was 0.89 (95% CI: 0.86–0.92). Nonetheless, there was a significant amount of heterogeneity (I2 = 96%) among the studies. Conclusion: The overall data analysed in this review indicates that patients with cancer had far reduced likelihood of developing OSAS than individuals without cancer. However, the significant variation across the included studies highlights the need for additional investigation to fully clarify the complex association between OSAS and cancer incidence. These results emphasise how critical it is to identify OSAS as a possible comorbidity in cancer patients, one that should be taken into account for clinical management and ongoing research
Maryam und Maria – eine besondere Frau und ein Vorbild für Gläubige (?!)
Full text linkerarbeitet von Naciye Kamçılı-Yıldız und Monika Tautz [Herausgeber: Prof. Dr. Zishan Ghaffar, Zentrum für Komparative Theologie und Kulturwissenschaften (ZeKK) Universität Paderborn, Prof. Dr. Klaus von Stosch, International Center for Comparative Theology and Social Issues (CTSI) Universität Bonn ; Koordination & Redaktion: Sarah Lebock (ZeKK), Gülbahar Erdem (ZeKK)
Stakeholder theory and management: Understanding longitudinal collaboration networks
Full text linkThis paper explores the evolution of research collaboration networks in the 'stakeholder theory and management' (STM) discipline and identifies the longitudinal effect of co-authorship networks on research performance, i.e., research productivity and citation counts. Research articles totaling 6,127 records from 1989 to 2020 were harvested from the Web of Science Database and transformed into bibliometric data using Bibexcel, followed by applying social network analysis to compare and analyze scientific collaboration networks at the author, institution and country levels. This work maps the structure of these networks across three consecutive sub-periods (t1: 1989-1999; t2: 2000-2010; t3: 2011-2020) and explores the association between authors' social network properties and their research performance. The results show that authors collaboration network was fragmented all through the periods, however, with an increase in the number and size of cliques. Similar results were observed in the institutional collaboration network but with less fragmentation between institutions reflected by the increase in network density as time passed. The international collaboration had evolved from an uncondensed, fragmented and highly centralized network, to a highly dense and less fragmented network in t3. Moreover, a positive association was reported between authors' research performance and centrality and structural hole measures in t3 as opposed to ego-density, constraint and tie strength in t1. The findings can be used by policy makers to improve collaboration and develop research programs that can enhance several scientific fields. Central authors identified in the networks are better positioned to receive government funding, maximize research outputs and improve research community reputation. Viewed from a network's perspective, scientists can understand how collaborative relationships influence research performance and consider where to invest their decision and choices
Activated Biochar Is an Effective Technique for Arsenic Removal from Contaminated Drinking Water in Pakistan
Full text linkArsenic (As), the silent poison, is a widespread environmental pollutant which finds its way into drinking water supplies from natural or man-made sources and affects over 200 million people worldwide, including in Pakistan. It has been demonstrated that As causes serious health complications as well as social and economic losses. A quick, cost-effective, and simple method for efficiently filtering As from drinking water is urgently needed. The present study evaluates the ability of chemical treatment solutions to activate the sorption capacity of biochar derived from cotton stalks. The surface characteristics of CSB (cotton stalk biochar), HN-CSB (treated with nitric acid: HNO3), and Na-CSB (treated with sodium hydroxide: NaOH) were investigated for their As sorption capacities and efficiency in removing As from contaminated drinking water. The chemical modification of biochar significantly increased the surface area and pore volume of CSB, with a maximum observed in HN-CSB (three times higher than CSB). Fourier-transform infrared spectroscopy (FTIR) analysis revealed several functional groups (OH−, −COOH, C=O, N-H) on CSB, though the chemical modification of biochar creates new functional groups on its surface. Results showed that the maximum sorption capacity of CSB was (q = 90 µg g−1), of Na-CSB was (q = 124 µg g−1) and of HN-CSB was (q = 140 µg g−1) at an initial As concentration of 200 µg L−1, an adsorbent dose of 1 g L−1, with 4 h of contact time, a pH of 6 and a temperature of 25 ʰC. However, As removal was found to be 45–88% for CSB, 62–94% for Na-CSB and 67–95% for HN-CSB across all As concentrations. An isotherm model showed that As sorption results were best fitted to the Langmuir isotherm model in the case of CSB (Qmax = 103 µg g−1, R2 = 0.993), Na-CSB (Qmax = 151 µg g−1, R2 = 0.991), and HN-CSB (Qmax = 157 µg g−1, R2 = 0.949). The development of the largest surface area, a porous structure, and new functional groups on the surface of HN-CSB proved to be an effective treatment for As removal from contaminated drinking water. Both HN-CSB and Na-CSB are clearly cost-effective adsorbents under laboratory conditions, but HN-CSB is cheaper and more efficient in As removal than Na-CSB, allowing it to be used as a powerful and promising adsorbent for the removal of pollutants like Arsenic from aqueous solution
Dyke Davidoff Masson Syndrome with Hypothyroidism Complicated with Respiratory and Urinary Tract Infections: A Case Report
Full text linkThe Dyke-Davidoff-Masson Syndrome (DDMS) is a rare neurological disorder characterised by unilateral cerebral atrophy. Clinical features may include seizures, hemi paresis, facial asymmetry, and intellectual disability. The causative factors include an insult to the brain in utero or early infancy, e.g., CNS infections, hypoxic-ischemic encephalopathy, intracranial haemorrhage, trauma, inherited vascular malformations, but in some cases, no risk factors are found. Here, we present the case of a known epileptic patient with a history of stroke who presented with fever, abdominal pain with distention, and facial swelling. The diagnosis was established after clinical history, examination, and MRI findings
Pathways of Peace. The Philosophy and Sociology of Peace and Nonviolence.
No full textThis book explores the close interconnection that exists between sociological and philosophical scholarship in relation to peace studies. Through an examination of the thought of nine leading philosophers and sociologists in their historical and geographical context, the author considers notions of nonviolent resistance, pacifism and reverse strike, as well as violence theories of conflict, theories of conflict resolution, the problem of war, and political transitions towards democratization. Engaging with the work of Thoreau, Gandhi, Ghaffar Khan, Capitini, Dolci, Bobbio, Galtung, Sharp and Weil, and considering the institutionalisation of peace research, this volume will appeal to scholars and students of sociology, politics and philosophy with interest in peace and security studies, and conflict
Parasites and pathological condition in Green mussel Perna viridis Linnaeus, 1758 from western Johor Straits, Malaysia
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