The International Organization for Standardization.
17 Aug 2003-pp 753-769
TL;DR: The provided compressed bitstreams were uncompressed using provided software and the resulting sequences were compared to the original ones in terms of PSNR and it seems that last frames from some cameras give significantly worse PSNR than the rest of frames.
Abstract: The provided compressed bitstreams were uncompressed using provided software and the resulting sequences were compared to the original ones in terms of PSNR. Additionally, the sequence Ballroom was compressed using the provided software. Resulting bitstreams were processed as the ones provided by Sejong/ETRI to verify the whole chain of coding and decoding. The results obtained at Poznań University of Technology are included in the accompanying Excel file. They are the same as the ones provided by Sejong/ETRI, except for sequences Race1 and Flamenco2 results. The results for them are slightly worse than the ones presented by Sejong/ETRI. The difference is less than 0.05 dB. It seems that last frames from some cameras give significantly worse PSNR (about 10dB less than the rest of frames). The cause of this difference is unknown.
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TL;DR: Physicians who use electronic health records believe such systems improve the quality of care and are generally satisfied with the systems, but as of early 2008, electronic systems had been adopted by only a small minority of U.S. physicians, who may differ from later adopters of these systems.
Abstract: BACKGROUND Electronic health records have the potential to improve the delivery of health care services. However, in the United States, physicians have been slow to adopt such systems. This study assessed physicians' adoption of outpatient electronic health records, their satisfaction with such systems, the perceived effect of the systems on the quality of care, and the perceived barriers to adoption. METHODS In late 2007 and early 2008, we conducted a national survey of 2758 physicians, which represented a response rate of 62%. Using a definition for electronic health records that was based on expert consensus, we determined the proportion of physicians who were using such records in an office setting and the relationship between adoption and the characteristics of individual physicians and their practices. RESULTS Four percent of physicians reported having an extensive, fully functional electronic-records system, and 13% reported having a basic system. In multivariate analyses, primary care physicians and those practicing in large groups, in hospitals or medical centers, and in the western region of the United States were more likely to use electronic health records. Physicians reported positive effects of these systems on several dimensions of quality of care and high levels of satisfaction. Financial barriers were viewed as having the greatest effect on decisions about the adoption of electronic health records. CONCLUSIONS Physicians who use electronic health records believe such systems improve the quality of care and are generally satisfied with the systems. However, as of early 2008, electronic systems had been adopted by only a small minority of U.S. physicians, who may differ from later adopters of these systems.
1,123 citations
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TL;DR: In this article, the authors provide a review of 178 articles dating from 1999 to 2011 from journals related to business, management, and accounting to identify what determinants of sustainability reporting are examined in the literature and to identify (in)consistencies, gaps, and opportunities for future research.
Abstract: Since the end of the 1990s, sustainability reporting has become an increasingly relevant topic in business and academia. However, literature is still limited in quantity and no major reviews of the latest developments have thus far been presented. This paper provides a review of 178 articles dating from 1999 to 2011 from journals related to business, management, and accounting. Our aim is to identify what determinants of sustainability reporting are examined in the literature and to identify (in)consistencies, gaps, and opportunities for future research. We specifically illuminate factors influencing the adoption, the extent, and the quality of reporting. Based on our findings we provide an otherwise often missing link to theory (especially legitimacy, stakeholder, signaling, and institutional theory). Finally, possible future research themes are discussed by illuminating gaps and underexposed themes in the area of regulation and governance as well as reporting quality and stakeholder perception.
912 citations
TL;DR: A link between protein nutrition and immunity in honeybees and the critical role of resource availability on pollinator health is suggested and the importance of diet diversity is underscored.
Abstract: The maintenance of the immune system can be costly, and a lack of dietary protein can increase the susceptibility of organisms to disease. However, few studies have investigated the relationship between protein nutrition and immunity in insects. Here, we tested in honeybees (Apis mellifera) whether dietary protein quantity (monofloral pollen) and diet diversity (polyfloral pollen) can shape baseline immunocompetence (IC) by measuring parameters of individual immunity (haemocyte concentration, fat body content and phenoloxidase activity) and glucose oxidase (GOX) activity, which enables bees to sterilize colony and brood food, as a parameter of social immunity. Protein feeding modified both individual and social IC but increases in dietary protein quantity did not enhance IC. However, diet diversity increased IC levels. In particular, polyfloral diets induced higher GOX activity compared with monofloral diets, including protein-richer diets. These results suggest a link between protein nutrition and immunity in honeybees and underscore the critical role of resource availability on pollinator health.
642 citations
TL;DR: The results support the idea that both the quality and diversity (in a specific context of pollen can shape bee physiology and might help to better understand the influence of agriculture and land-use intensification on bee nutrition and health.
Abstract: Honey bee colonies are highly dependent upon the availability of floral resources from which they get the nutrients (notably pollen) necessary to their development and survival. However, foraging areas are currently affected by the intensification of agriculture and landscape alteration. Bees are therefore confronted to disparities in time and space of floral resource abundance, type and diversity, which might provide inadequate nutrition and endanger colonies. The beneficial influence of pollen availability on bee health is well-established but whether quality and diversity of pollen diets can modify bee health remains largely unknown. We therefore tested the influence of pollen diet quality (different monofloral pollens) and diversity (polyfloral pollen diet) on the physiology of young nurse bees, which have a distinct nutritional physiology (e.g. hypopharyngeal gland development and vitellogenin level), and on the tolerance to the microsporidian parasite Nosema ceranae by measuring bee survival and the activity of different enzymes potentially involved in bee health and defense response (glutathione-S-transferase (detoxification), phenoloxidase (immunity) and alkaline phosphatase (metabolism)). We found that both nurse bee physiology and the tolerance to the parasite were affected by pollen quality. Pollen diet diversity had no effect on the nurse bee physiology and the survival of healthy bees. However, when parasitized, bees fed with the polyfloral blend lived longer than bees fed with monofloral pollens, excepted for the protein-richest monofloral pollen. Furthermore, the survival was positively correlated to alkaline phosphatase activity in healthy bees and to phenoloxydase activities in infected bees. Our results support the idea that both the quality and diversity (in a specific context) of pollen can shape bee physiology and might help to better understand the influence of agriculture and land-use intensification on bee nutrition and health.
623 citations
TL;DR: A review of existing attempts to define and classify SoS is used to identify several dimensions that characterise SoS applications and the state of the art for SoS modelling, architectural description, simulation, verification, and testing is reviewed.
Abstract: The term “System of Systems” (SoS) has been used since the 1950s to describe systems that are composed of independent constituent systems, which act jointly towards a common goal through the synergism between them. Examples of SoS arise in areas such as power grid technology, transport, production, and military enterprises. SoS engineering is challenged by the independence, heterogeneity, evolution, and emergence properties found in SoS. This article focuses on the role of model-based techniques within the SoS engineering field. A review of existing attempts to define and classify SoS is used to identify several dimensions that characterise SoS applications. The SoS field is exemplified by a series of representative systems selected from the literature on SoS applications. Within the area of model-based techniques the survey specifically reviews the state of the art for SoS modelling, architectural description, simulation, verification, and testing. Finally, the identified dimensions of SoS characteristics are used to identify research challenges and future research areas of model-based SoS engineering.
314 citations