4,744 research outputs found
author-bios-SRD-19-0063.R1 – Supplemental material for The Network Structure of Police Misconduct
No full textSupplemental material, author-bios-SRD-19-0063.R1 for The Network Structure of Police Misconduct by George Wood, Daria Roithmayr and Andrew V. Papachristos in Socius</p
Going Beyond Counting First Authors in Author Co-citation Analysis
No full textThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Dispelling the Myths Behind First-author Citation Counts
No full textWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
Speech of Hon. A. P. Butler, of South Carolina, on the difficulty of Messrs. Brooks and Sumner, and the causes thereof.
No full textAlso published as the first part of "The Massachusetts resolutions on the Sumner assault, and the slavery issue. Speeches of Senators Butler, Evans and Hunter."Mode of access: Internet
Assessing the George W. Bush Presidency: A Tale of Two Terms
No full textIn one of the first volumes assessing the full two terms of the George W. Bush presidency, Wroe and Herbert have gathered the work of leading American and European scholars. In fifteen succinct and incisive chapters, authorities such as Jim Pfiffner, John Maltese, Graham Wilson and Alan Gitelson offer assessments of the Bush administration's successes and failures. Extensive attention is paid to Bush's foreign policy, including 'The War on Terror' but the focus is broadened to absorb not only the Bush Doctrine and its repercussions, but also his trade and homeland security policies. The president's domestic leadership in economics and social policy is investigated, as are his dealings as president with the other institutions of the U.S. political system. The result is a comprehensive guide to the Bush presidency and its legacy
Model-Based Validation for Internet Services
No full textOperator mistakes have been identified as a significant source of unavailability in Internet services. In our previous work, we proposed operator action validation as a framework for detecting mistakes while hiding them from the service and its users. Unfortunately, previous validation strategies have limitations: they require known instances of correct behavior for comparison and they fail to detect latent mistakes, i.e. those that do not lead to unexpected behaviors during the validation process. In this paper, we propose a novel validation strategy, called model-based validation, that addresses these limitations and complements the other strategies. Modelbased validation introduces a new language for service engineers to write assertions about expected behaviors, proper configurations, and proper structural characteristics, and an associated runtime system, which executes the assertions and monitors the service’s execution. Our evaluation demonstrates that model-based validation is highly effective at detecting and hiding both activated and latent mistakes.Technical report DCS-TR-60
The effectiveness of interventions to treat severe acute malnutrition in young children: a systematic review
No full textSevere acute malnutrition (SAM) arises as a consequence of a sudden period of food shortage and is associated with loss of a person’s body fat and wasting of their skeletal muscle. Many of those affected are already undernourished and are often susceptible to disease. Infants and young children are the most vulnerable as they require extra nutrition for growth and development, have comparatively limited energy reserves and depend on others. Undernutrition can have drastic and wide-ranging consequences for the child’s development and survival in the short and long term. Despite efforts made to treat SAM through different interventions and programmes, it continues to cause unacceptably high levels of mortality and morbidity. Uncertainty remains as to the most effective methods to treat severe acute malnutrition in young children.ObjectivesTo evaluate the effectiveness of interventions to treat infants and children aged < 5 years who have SAM.Data sourcesEight databases (MEDLINE, EMBASE, MEDLINE In-Process & Other Non-Indexed Citations, CAB Abstracts Ovid, Bioline, Centre for Reviews and Dissemination, EconLit EBSCO and The Cochrane Library) were searched to 2010. Bibliographies of included articles and grey literature sources were also searched. The project expert advisory group was asked to identify additional published and unpublished references.Review methodsPrior to the systematic review, a Delphi process involving international experts prioritised the research questions. Searches were conducted and two reviewers independently screened titles and abstracts for eligibility. Inclusion criteria were applied to the full texts of retrieved papers by one reviewer and checked independently by a second. Included studies were mapped to the research questions. Data extraction and quality assessment were undertaken by one reviewer and checked by a second reviewer. Differences in opinion were resolved through discussion at each stage. Studies were synthesised through a narrative review with tabulation of the results.ResultsA total of 8954 records were screened, 224 full-text articles were retrieved, and 74 articles (describing 68 studies) met the inclusion criteria and were mapped. No evidence focused on treatment of children with SAM who were human immunodeficiency virus sero-positive, and no good-quality or adequately reported studies assessed treatments for SAM among infants < 6 months old. One randomised controlled trial investigated fluid resuscitation solutions for shock, with none adequately treating shock. Children with acute diarrhoea benefited from the use of hypo-osmolar oral rehydration solution (H-ORS) compared with the standard World Health Organization-oral rehydration solution (WHO-ORS). WHO-ORS was not significantly different from rehydration solution for malnutrition (ReSoMal), but the safety of ReSoMal was uncertain. A rice-based ORS was more beneficial than glucose-based ORSs, and provision of zinc plus a WHO-ORS had a favourable impact on diarrhoea and need for ORS. Comparisons of different diets in children with persistent diarrhoea produced conflicting findings. For treating infection, comparison of amoxicillin with ceftriaxone during inpatient therapy, and routine provision of antibiotics for 7 days versus no antibiotics during outpatient therapy of uncomplicated SAM, found that neither had a significant effect on recovery at the end of follow-up. No evidence mapped to the next three questions on factors that affect sustainability of programmes, long-term survival and readmission rates, the clinical effectiveness of management strategies for treating children with comorbidities such as tuberculosis and Helicobacter pylori infection and the factors that limit the full implementation of treatment programmes. Comparison of treatment for SAM in different settings showed that children receiving inpatient care appear to do as well as those in ambulatory or home settings on anthropometric measures and response time to treatment. Longer-term follow-up showed limited differences between the different settings. The majority of evidence on methods for correcting micronutrient deficiencies considered zinc supplements; however, trials were heterogeneous and a firm conclusion about zinc was not reached. There was limited evidence on either supplementary potassium or nicotinic acid (each produced some benefits), and nucleotides (not associated with benefits). Evidence was identified for four of the five remaining questions, but not assessed because of resource limitation.LimitationsThe systematic review focused on key questions prioritised through a Delphi study and, as a consequence, did not encompass all elements in the management of SAM. In focusing on evidence from controlled studies with the most rigorous designs that were published in the English language, the systematic review may have excluded other forms of evidence. The systematic review identified several limitations in the evidence base for assessing the effectiveness of interventions for treating young children with severe acute malnutrition, including a lack of studies assessing the different interventions; limited details of study methods used; short follow-up post intervention or discharge; and heterogeneity in participants, interventions, settings, and outcome measures affecting generalisability.ConclusionsFor many of the most highly ranked questions evidence was lacking or inconclusive. More research is needed on a range of topic areas concerning the treatment of infants and children with SAM. Further research is required on most aspects of the management of SAM in children < 5 years, including intravenous resuscitation regimens for shock, management of subgroups (e.g. infants < 6 months old, infants and children with SAM who are human immunodeficiency virus sero-positive) and on the use of antibiotics.FundingThe National Institute for Health Research Technology Assessment programme.<br/
Aid, Growth and Poverty
No full textThe authors discuss the impact of foreign aid and tackle the question of why assessing the impact of aid is so difficult. The authors focus on peer-reviewed, cross-country studies published over the last decade and draw together some global-level assessments, considering the context and conditions under which aid might be said to ‘work’. Glennie and Sumner argue that the evidence in four areas shows signs of convergence that may have direct relevance for policy decisions on aid and for aid effectiveness discussions. These are as follows: Aid levels (meaning if aid is too low or too high); Domestic political institutions (including political stability and extent of decentralisation); Aid composition (including sectors, modalities, objectives and time horizons); and Aid volatility and fragmentation. Notably, this study finds that there is no consensus that the effectiveness of aid depends on orthodox economic policies.</p
Dialogical Skirmishes
No full textTan was guest editor for 'And Now China?', a special print edition of the Ctrl+P journal, which critically responded to the celebratory rhetoric’s of ‘China Now’ and other celebratory markers of China's global ascent in 2008. As well as the introductory article 'Dialogical Skirmishes', Tan also interviewed Hans Ulrich Obrist
Essays in industrial organization
No full textThis dissertation contains three chapters on topics in industrial organization. Chapter 2 examines the accuracy of the Hypothetical Monopolist Test, a test for market definition which is often used in the legal analysis of mergers. Chapter 3 analyzes the use of market share discounts by firms and the effect of these discounts on profits and consumer welfare. Chapter 4 investigates pricing practices where a service is offered for a fixed fee plus a multipart usage fee. In Chapter 2, the accuracy of the Hypothetical Monopolist Test (HMT) is examined. In applying the test, two separate models are considered. In each model, the true extent of the product market is known. First, the HMT is applied in a linear differentiated demand model with n firms each producing one symmetrically differentiated product. The test consistently underestimates the number of products in the relevant market in this setting. The second model utilizes a quasi-linear utility specification, and I derive conditions under which the number of products in the market is overestimated. Chapter 3 analyzes the practice of a manufacturer offering a discount or rebate to a retailer if the sales of that manufacturer’s product achieve certain benchmarks. Using a vertical model with linear differentiated demand, I find that the welfare effects of market share discount plans can often be positive. The optimal market share discount plan is closely approximates the outcome of vertical integration between the manufacturer and the retailer. This constructive vertical integration can eliminate double marginalization and encourage competing manufacturers to decrease their own wholesale prices. As such, when one manufacturer offers a market share discount plan, the prices of all products may fall. In Chapter 4, I examine pricing plans that include buckets of free units, as are common in the wireless telephone industry. A simple demand structure is established which allows for direct comparisons of the profits and consumer welfare under different pricing plans. The free bucket pricing plans are shown to generate the same profits for the monopolist and the same consumer surplus as two-part tariffs, even when multiple plans are offered to consumers.Ph. D.Includes bibliographical referencesIncludes vitaby Andrew P. Vassall
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