196,348 research outputs found
Reciprocal inhibition in co-contracting forearm muscles during suppression of motor cortical output: evidence suggesting that the central command for decreased reciprocal inhibition is uncoupled from motor cortical activity
No full textImpact of backgrounds and light scenes' characteristics on paintings' perception
No full textIn recent years LED light sources' characteristics rapidly improved while their costs
decreased, making their use more and more widespread. In more detail, LEDs' colour
rendering index (CRI) was constantly upgraded; such parameter is important to guarantee a
good colour perception in indoor environments in order to ensure users' comfort and
wellbeing. People's colour perception is also affected by environmental conditions, such as
surfaces' optical characteristics, light sources' spectral power distribution (SPD) and
illuminance levels. This topic is particularly relevant in museums, the main goal of which is to
enhance artworks' perception by choosing the proper lighting system and setting's
characteristics. To investigate how people perceive an artwork when changing light scenes'
and setting's characteristics, a test on 21 subjects was carried out and the results are
reported in this paper
Electrical stimulation over muscle tendons in humans - Evidence favouring presynaptic inhibition of Ia fibres due to the activation of group III tendon afferents
No full textElectrical stimulation over muscle tendons produces a transient suppression of voluntary EMG activity; its onset latency is similar to 55 ms in the forearm extensor muscles. This phenomenon has been attributed to the activation of a polysynaptic inhibitory pathway originating from II, afferent fibres. To clarify its origin we conducted several experiments in IO nor-mal healthy subjects. The EMG silence after tendon stimulation appeared at relatively high stimulus intensities (>50 mA); conditioning cutaneous stimulation left it unchanged, and the inhibition had a short recovery cycle (50 ms). Tendon stimulation still evoked EMG suppression during an ischaemic block of fast-conducting afferents. The motor potentials evoked bq, transcranial magnetic stimulation of the motor cortex during the EMG silence remained almost unchanged, whereas the H reflex was strongly inhibited Hence we conclude that tendon stimulation activates slow-conducting tendon afferents, possibly group III fibres, connected not through a polysynaptic pathway originating from Ib afferents but through nit oligo-or disynaptic inhibitory circuit. The EMG suppression after tendon stimulation probably represents a dysfacilitation of the alpha-motor neurons due to presynaptic inhibition of In fibres produced by tendon afferent input to the spinal cord
Dr. Duane M. Jackson, Morehouse College, July 2011
No full textThis video is a conversation with Dr. Duane M. Jackson. Dr. Jackson talks about his paper, "Recall and the Serial Position Effect: The Role of Primacy and Recency on Accounting Students' Performance." Jackie Daniel, AUC Woodruff Library, is the interviewer
"Reflections on the subject of Emigration from Europe with a view to Settlement in the United States" By M. Carey.
No full text"Reflections on the subject of Emigration from Europe with a view to Settlement in the United States: containing bried sketches of the moral and political character of those states.
By M. Carey, member of the American philosophical, and of the American Antiquarian Society, and author of The Olive Branch, Cindiciae Hibernicae, essays on banking, on political economy, and on internal improvement.
To which are now added the English editor's comments on the subject; together with Important Advice to Emigrants, and Cautions Against Impositions Practiced in the Outports
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
Dr. Glendon Swarthout
No full textHosted by Roger M. Busfield, MSU Assistant Professor of Speech and Theater, Meet the Author is designed to introduce a general audience to a contemporary author and their work through in-depth interviews. This episode features a conversation between Dr. Glendon Swarthout, prolific author and English professor at MSU, and assistant professors Sam S. Baskett and Theodore B. Strandness
Immigration, Labor Market Mobility, and the Earnings of Native-born Workers: An Occupational Segmentation Approach
No full textThis paper seeks to improve on previous estimates of the impact of immigration on native wages by using an occupational segmentation approach that directly controls for regional migration and other shifts in native-born labor supply. The labor market is segmented by occupation in order to determine which, if any, native workers tend to be vulnerable to increased immigrant competition for jobs. The results suggest that nativeborn workers in the primary sector are the main beneficiaries of increased immigration, while native-born Hispanic females in the secondary sector are the most susceptible to downward wage pressures.
Simulation of thermal plant optimization and hydraulic aspects of thermal distribution loops for large campuses
No full textFollowing an introduction, the author describes Texas A&M University and its utilities system. After that, the author presents how to construct simulation models for chilled water and heating hot water distribution systems. The simulation model was used in a $2.3 million Ross Street chilled water pipe replacement project at Texas A&M University. A second project conducted at the University of Texas at San Antonio was used as an example to demonstrate how to identify and design an optimal distribution system by using a simulation model. The author found that the minor losses of these closed loop thermal distribution systems are significantly higher than potable water distribution systems. In the second part of the report, the author presents the latest development of software called the Plant Optimization Program, which can simulate cogeneration plant operation, estimate its operation cost and provide optimized operation suggestions. The author also developed detailed simulation models for a gas turbine and heat recovery steam generator and identified significant potential savings. Finally, the author also used a steam turbine as an example to present a multi-regression method on constructing simulation models by using basic statistics and optimization algorithms. This report presents a survey of the author??s working experience at the Energy Systems Laboratory (ESL) at Texas A&M University during the period of January 2002 through March 2004. The purpose of the above work was to allow the author to become familiar with the practice of engineering. The result is that the author knows how to complete a project from start to finish and understands how both technical and nontechnical aspects of a project need to be considered in order to ensure a quality deliverable and bring a project to successful completion. This report concludes that the objectives of the internship were successfully accomplished and that the requirements for the degree of Degree of Engineering have been satisfied
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