134,771 research outputs found
Illustration, Thomas Hart Benton
No full textThis is an illustration of Thomas Hart Benton, a United States Senator from Missouri. Benton is depicted looking over his shoulder and wearing a dark coat and white shirt. His name is in script below the illustration and D. Appleton and Co Publishers is beneath his name. The illustration appears in volume one of Abraham Lincoln : A History by John G. Nicolay and John Hay
Testimony before House Education Subcommittee on Vocational Education hearing by Robert D. Benton, September 16, 1975
No full textThis publication is a testimony before House Education Subcommittee on Vocational Education hearing by Robert D. Benton
Alick D. Walker 1925-1999: an appreciation
No full textBenton, Michael J., Gower, David J. (2002): Alick D. Walker 1925-1999: an appreciation. Zoological Journal of the Linnean Society 136 (1): 1-5, DOI: 10.1046/j.1096-3642.1999.00022.x, URL: https://academic.oup.com/zoolinnean/article-lookup/doi/10.1046/j.1096-3642.1999.00022.
Reduction of railway noise at source - practical and cost effective methods for different track forms
No full textExcessive noise is one of the main public criticisms of rail transport in Europe and this has an impact on the potential for growth of rail. This is not necessarily the main obstacle to a modal shift from road and air transport to rail transport, but it is important that it is tackled head on. The European Commission, through its environmental agencies, is establishing a framework of legislative instruments, which, once implemented and effective, will assist in reducing the level of noise and the public’s perception. The development of practical solutions for achieving target noise reductions is progressing and some of the newer technologies are beginning to be exploited. These will need wider adoption if the desired noise reductions are to be achieved over reasonable timescales. Considerable progress has been made in enabling the economically viable implementation of the measures.The reduction of noise from railway sources has been the subject of significant research over the last decade and more. This paper examines the practical application of some of the options and describes their potential impact on track environmental design.The basic principles of the different approaches to noise reduction are explained to provide an appreciation of what is possible. The detail varies according to the particular track-form being evaluated, ranging from old conventional tracks requiring retrofitting to new build on slab tracks. The paper examines measured and predicted values of noise reduction with differing approaches taking into account the different track structures’ dynamic response.Additional criteria for evaluating noise reduction measures are discussed, such as the impact on the railway from both an environmental and safety point of view.It is often found that noise issues have a local character, which requires a sensitive appreciation of the local issues and population. The paper attempts to give guidance on a range of possible scenarios for which different combinations of measures are useful.The implementation of the measures discussed would significantly contribute to the aim of the environmental policy of the EU to reduce substantially the number of people affected by long-term average levels of noise
The fossil record of early tetrapods: Worker effort and the end-Permian mass extinction
No full textIt is important to understand the quality of the fossil record of early tetrapods (Tetrapoda. minus Lissamphibia and Amniota) because of their key role in the transition of vertebrates from water to land, their dominance of terrestrial faunas for over 100 million years of the late Palaeozoic and early Mesozoic, and their variable fates during the end-Permian mass extinction. The first description of an early tetrapod dates back to 1824, and since then discoveries have occurred at a rather irregular pace, with peaks and troughs corresponding to some of the vicissitudes of human history through the past two centuries. As expected, the record is dominated by the well-sampled sedimentary basins of Europe and North America, but finds from other continents are increasing rapidly. Comparisons of snapshots of knowledge in 1900, 1950, and 2000 show that discovery of new species has changed the shape of the species-level diversification curve, contrary to earlier studies of family-level taxa. There is, however, little evidence that taxon counts relate to research effort (as counted by numbers of publications), and there are no biasing effects associated with differential study of different time intervals through the late Palaeozoic and Mesozoic. In fact, levels of effort are apparently not related to geological time, with no evidence that workers have spent more time on more recent parts of the record. In particular, the end-Permian mass extinction was investigated to determine whether diversity changes through that interval might reflect worker effort: it turns out that most records of early tetrapod taxa (when corrected for duration of geological series) occur in the Lower Triassic.</p
Measuring Benton Meadow snow course
No full textBob Mutch, PREF Superintendent, measuring Benton Meadow snow course
B. Mutch at Benton Spring storage rain gage
No full textB. Mutch at Benton Spring storage rain gage, located at sampling point #2 on Benton Spring snowcours
MeSH term explosion and author rank improve expert recommendations
No full textInformation overload is an often-cited phenomenon that reduces the productivity, efficiency and efficacy of scientists. One challenge for scientists is to find appropriate collaborators in their research. The literature describes various solutions to the problem of expertise location, but most current approaches do not appear to be very suitable for expert recommendations in biomedical research. In this study, we present the development and initial evaluation of a vector space model-based algorithm to calculate researcher similarity using four inputs: 1) MeSH terms of publications; 2) MeSH terms and author rank; 3) exploded MeSH terms; and 4) exploded MeSH terms and author rank. We developed and evaluated the algorithm using a data set of 17,525 authors and their 22,542 papers. On average, our algorithms correctly predicted 2.5 of the top 5/10 coauthors of individual scientists. Exploded MeSH and author rank outperformed all other algorithms in accuracy, followed closely by MeSH and author rank. Our results show that the accuracy of MeSH term-based matching can be enhanced with other metadata such as author rank
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