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VSImG: A high frame rate bitmap based display system for neuroscience research

ALMEIDA, Lirio Onofre Baptista de; SLAETS, Jan Frans Willem; KOBERLE, Roland
Fonte: ELSEVIER SCIENCE BV Publicador: ELSEVIER SCIENCE BV
Tipo: Artigo de Revista Científica
ENG
Relevância na Pesquisa
35.94%
This paper describes a visual stimulus generator (VSImG) capable of displaying a gray-scale, 256 x 256 x 8 bitmap image with a frame rate of 500 Hz using a boustrophedonic scanning technique. It is designed for experiments with motion-sensitive neurons of the fly`s visual system, where the flicker fusion frequency of the photoreceptors can reach up to 500 Hz. Devices with such a high frame rate are not commercially available, but are required, if sensory systems with high flicker fusion frequency are to be studied. The implemented hardware approach gives us complete real-time control of the displacement sequence and provides all the signals needed to drive an electrostatic deflection display. With the use of analog signals, very small high-resolution displacements, not limited by the image`s pixel size can be obtained. Very slow image displacements with visually imperceptible steps can also be generated. This can be of interest for other vision research experiments. Two different stimulus files can be used simultaneously, allowing the system to generate X-Y displacements on one display or independent movements on two displays as long as they share the same bitmap image. (C) 2011 Elsevier B.V. All rights reserved.; Fundacao de Amparo a Pesquisa do Estado de Sao Paulo-FAPESP; Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Effect of varying the time frame for COOP-WONCA functional health status charts: a nested randomised controlled trial in Bristol, UK

Peters, T. J.; Coast, J.; Richards, S. H.; Gunnell, D. J.
Fonte: BMJ Group Publicador: BMJ Group
Tipo: Artigo de Revista Científica
Publicado em /01/1998 EN
Relevância na Pesquisa
46.06%
STUDY OBJECTIVES: To investigate whether changing the stated time frame for COOP-WONCA charts has any effect on responses. Specifically, to assess the effect of attempting to avoid the situation where the time frame crosses the onset of an acute episode. DESIGN: A randomised controlled trial of two time frames, nested within a main trial comparing early discharge with a hospital at home scheme against routine discharge policy. The time frames compared were the standard two weeks (four for the pain chart) and a shorter period of 48 hours for all seven charts. SETTING: Acute hospital wards in Frenchay Healthcare Trust and the Avon Orthopaedic Centre in Bristol. PARTICIPANTS: Patients entered into the main trial, who were medically stable, in need of continued rehabilitative care but suitable for discharge to hospital at home. MAIN RESULTS: A total of 200 patients were randomised, 106 to the shorter time frame, 94 to the standard charts. No clear differences were observed between the two groups for the proportion failing to self complete the charts. For the (seven) chart scores, only pain was statistically significantly different between the time frames (Mann-Whitney p = 0.0085; proportion reporting moderate or severe pain 19% higher in the standard group...

Simulation of Relative Temporal Resolution of Time-Resolved MRA Sequences

Keith, L.; Kecskemeti, S.; Velikina, J.; Mistretta, C.
Fonte: PubMed Publicador: PubMed
Tipo: Artigo de Revista Científica
Publicado em /08/2008 EN
Relevância na Pesquisa
35.95%
Time-resolved MRA sequences are typically characterized by the display frame rate. However, true temporal resolution should be defined in a manner analogous to spatial resolution; it is not the ability of a sequence to update rapidly but rather the ability to discern changes that occur within a small time that should characterize temporal resolution. For view-shared methods like Keyhole and TRICKS, regions of k-space from multiple time frames are combined to form a single reconstructed time frame. This often causes the time needed to acquire all k-space data points to be significantly longer than the displayed frame time, resulting in poor frequency response. Simulated here are the temporal impulse response and temporal frequency response curves of three time-resolved MRA methods including the recently introduced HYPR LR method. It is found that the HYPR LR reconstruction method exhibits a better temporal frequency response for a larger spectrum of temporal and spatial frequencies than the Keyhole and TRICKS methods.

Spatio-temporal activity in real time (STAR): Optimization of regional fMRI feedback

Magland, Jeremy F.; Tjoa, Christopher W.; Childress, Anna Rose
Fonte: PubMed Publicador: PubMed
Tipo: Artigo de Revista Científica
EN
Relevância na Pesquisa
35.99%
The use of real-time feedback has expanded fMRI from a brain probe to include potential brain interventions with significant therapeutic promise. However, whereas time-averaged blood oxygenation level-dependent (BOLD) signal measurement is usually sufficient for probing a brain state, the real-time (frame-to-frame) BOLD signal is noisy, compromising feedback accuracy. We have developed a new real-time processing technique (STAR) that combines noise-reduction properties of multi-voxel (e.g., whole-brain) techniques with the regional specificity critical for therapeutics. Nineteen subjects were given real-time feedback in a cognitive control task (imagining repetitive motor activity vs. spatial navigation), and were all able to control a visual feedback cursor based on whole-brain neural activity. The STAR technique was evaluated, retrospectively, for five a priori regions of interest in these data, and was shown to provide significantly better (frame-by-frame) classification accuracy than a regional BOLD technique. In addition to regional feedback signals, the output of the STAR technique includes spatio-temporal activity maps (movies) providing insight into brain dynamics. The STAR approach offers an appealing optimization for real-time fMRI applications requiring an anatomically-localized feedback signal.

What Happens before Syncope? Study of the Time Frame Preceding Vasovagal Syncope

Lagi, Alfonso; Cencetti, Simone; Cartei, Alessandro
Fonte: International Scholarly Research Network Publicador: International Scholarly Research Network
Tipo: Artigo de Revista Científica
EN
Relevância na Pesquisa
45.81%
Objective. The events characterizing the very last part of the vasovagal crisis has not been determined. The aim of the study was to analyze the variations in respiratory pattern preceding the vaso-vagal syncope full-blown and the relationship between cardiovascular functions in order to assess the temporal sequence. Methods. Eleven consecutive patients were studied. Heart rate, arterial pressure, respiratory frequency, tidal volume, carbon dioxide, and oxygen saturation in time domain from supine and standing recordings were analyzed. Results. The respiratory activity is different in the time frame preceding syncope, both in VT and breathing rate, and that the increase of the lung ventilation does not influence the baroreflex control during the presyncopal period but may be cause of the baroreflex failure during the full-blown syncope.

Delayed administration of VEGF rescues spinal motor neurons from death with a short effective time frame in excitotoxic experimental models in vivo

Tovar-y-Romo, Luis B; Tapia, Ricardo
Fonte: American Society for Neurochemistry Publicador: American Society for Neurochemistry
Tipo: Artigo de Revista Científica
Publicado em 27/03/2012 EN
Relevância na Pesquisa
45.81%
VEGF (vascular endothelial growth factor) prevents neuronal death in different models of ALS (amyotrophic lateral sclerosis), but few studies have addressed the efficacy of VEGF to protect motor neurons after the onset of symptoms, a critical point when considering VEGF as a potential therapeutic target for ALS. We studied the capability of VEGF to protect motor neurons after an excitotoxic challenge in two models of spinal neurodegeneration in rats induced by AMPA (α-amino-3-hydroxy-5-methylisoxazole-4-propionic acid) administered either chronically with osmotic minipumps or acutely by microdialysis. VEGF was administered through osmotic minipumps in the chronic model or injected intracerebroventricularly in the acute model, and its effects were assessed by immunohistochemical and histological analyses and motor performance tests. In the chronic model, VEGF stopped the progression of the paralysis and protected motor neurons when administered after AMPA before the onset of the motor symptoms, whereas no protection was observed when administered after the onset. VEGF was also protective in the acute model, but with a short time window, since the protection was effective when administered 1 h but not 2 h after AMPA. Our results indicate that while VEGF has an indubitable neuroprotective effect...

Assault Related Substance Use as a Predictor of Substance Use Over Time Within a Sample of Recent Victims of Sexual Assault

Resnick, Heidi S.; Walsh, Kate; McCauley, Jenna L.; Schumacher, Julie A.; Kilpatrick, Dean G.; Acierno, Ron E.
Fonte: PubMed Publicador: PubMed
Tipo: Artigo de Revista Científica
EN
Relevância na Pesquisa
35.89%
Substance use at time of assault is reported by a significant subgroup of rape victims. This study examined: (1) prevalence of assault related marijuana or alcohol use among women seeking post-rape medical care; (2) sensitivity, specificity, positive and negative predictive power associated with reported use at time of assault in association with use in 6 weeks pre-assault, post assault use, and post-assault abuse; and (3) trajectories of use and abuse over time as a function of use in 6 weeks pre-assault/assault time frame use, exposure to brief intervention, and interaction of pre-assault/assault time frame use with intervention. Participants were 268 women seeking post sexual assault medical services completing one or more follow-up assessment at: (1) < 3 months post-assault; (2) 3 to 6 months post-assault; and (3) 6 months or longer post-assault. Use of alcohol or marijuana at time of assault were fairly sensitive or specific indicators respectively, of reported use of specific substance in the 6 weeks preceding assault and use or abuse at follow-up. Growth modeling revealed that use of alcohol or marijuana at the time of the assault or in the 6 weeks prior to assault predicted higher Time 1 follow-up alcohol and marijuana use and abuse. Although there was relatively little change in use or abuse over time...

A time frame of critical/sensitive periods of language development

Ruben, Robert J.
Fonte: Springer India Publicador: Springer India
Tipo: Artigo de Revista Científica
Publicado em /07/1999 EN
Relevância na Pesquisa
45.81%
By a focus on three essential elements of language, phonology, semantics, and syntax, a time frame for critical/sensitive periods of language development is presented as a model of central auditory nervous system flexibility. Several studies support the hypothesis that the critical/sensitive period of phonology is from the sixth month of fetal life through the 12th month of infancy. Data indicates that the critical/sensitive periods for syntax runs through the fourth year of life, and for semantics through the 15th or 16th year of life. The data indicate that there is a time dependent series of functions in sequence that is based on responsive adaptations made by the CNS to psychophysical and electrophysiological stimuli.

Time frames and the distinction between affective and cognitive well-being

Luhmann, Maike; Hawkley, Louise C.; Eid, Michael; Cacioppo, John T.
Fonte: PubMed Publicador: PubMed
Tipo: Artigo de Revista Científica
EN
Relevância na Pesquisa
35.93%
We examined whether the empirical differences between affective well-being (AWB) and cognitive well-being (CWB) might be due to (a) the use of different time frames in measures of AWB and CWB or (b) structural differences. In Study 1, a multitrait-multimethod (MTMM) analysis indicated that levels of different components are more similar but do not converge completely when the same time frame is used. In Study 2, we found that people are more likely to consider global life circumstances (as opposed to specific events and activities) when they evaluate their CWB, regardless of the specific time frame. In both studies, the time frame did not moderate the associations between AWB and CWB and important correlates (personality, life circumstances).

A Comparative Study of Peptide Storage Conditions Over an Extended Time Frame

Tran, Diana; Nguyen, Victoria; Breck, Melissa; Phinney, Brett; Weber, Darren
Fonte: Association of Biomolecular Resource Facilities Publicador: Association of Biomolecular Resource Facilities
Tipo: Artigo de Revista Científica
Publicado em //2012 EN
Relevância na Pesquisa
45.84%
Over the past decade, the study of proteomics has been rapidly evolving and so too have the technologies that accompany it. One branch of proteomics in particular— bottom-up proteomics— has become a cornerstone of many studies. Extracting and storing peptides over long periods of time for bottom-up analysis can prove to be a cumbersome task, requiring specific storage conditions that do not result in the degradation of the sample of interest. To date, there are no studies that analyze the effects of various storage conditions on the stability of peptides over an extended period. In this study, tryptic digests were performed on human breast milk and the resulting peptides were subject to varying storage temperatures and buffers. Four storage temperatures—room temperature, 4°C, −20°C, and −80°C— and three storage conditions—dried, re-suspended in ultra-pure water, and re-suspended in 0.1% trifluoroacetic acid (TFA)—were compared over an eight week time frame. Peptide degradation was analyzed using spectral counting on the protein level. In addition, five proteins were tracked in the milk digest and were analyzed using assigned spectra. Each condition consisted of four replicates and statistical analysis was done to test for variations between samples. Preliminary data suggests that there is a degradation of peptides over extended periods of time and that certain storage temperatures and buffers may impede such losses. A solution of 0.1% TFA at temperatures between 4°C and −80°C appear to slow down the degradation of peptides.

Engagement of SLAMF2/CD48 prolongs the time frame of effective T cell activation by supporting mature dendritic cell survival#

Kis-Toth, Katalin; Tsokos, George C.
Fonte: PubMed Publicador: PubMed
Tipo: Artigo de Revista Científica
EN
Relevância na Pesquisa
45.78%
Signaling lymphocyte activation molecule family member 2 (SLAMF2/CD48) is a co-activator and adhesion molecule on cells with hematopoietic origin. It ligates mainly SLAMF4 on effector/memory CD8+ T cells and natural killer cells, suggesting a potential role during viral infection, with SLAMF2 acting as a ligand to activate SLAMF4-bearing cells. The ability of SLAMF2 to signal on its own after it is engaged, and the functional consequences are largely unknown. We found that cytosolic DNA-activated DCs upregulate the expression of SLAMF2 molecules. Using anti-SLAMF2 antibody and SLAMF4 recombinant protein we found that SLAMF2 engagement activates immature DCs, and more interestingly, prolongs the survival of DNA-activated DCs by inhibiting IFNβ production and IFNβ-induced apoptosis, and promotes the production of the granzyme B inhibitor protease inhibitor-9. Thus, SLAMF2 can serve as a survival molecule for DNA-activated DCs during their interaction with SLAMF4-expressing cytotoxic T cells. Based on our results we propose that SLAMF2 engagement regulates adaptive immune responses by providing longer access of putative antigen presenting cells to virus-specific effector T cells by prolonging the time frame of effective stimulation.

Using expert knowledge and modeling to define mangrove composition, functioning, and threats and estimate time frame for recovery

Mukherjee, Nibedita; Sutherland, William J; Khan, Md Nabiul I; Berger, Uta; Schmitz, Nele; Dahdouh-Guebas, Farid; Koedam, Nico
Fonte: Blackwell Publishing Ltd Publicador: Blackwell Publishing Ltd
Tipo: Artigo de Revista Científica
EN
Relevância na Pesquisa
45.84%
Mangroves are threatened worldwide, and their loss or degradation could impact functioning of the ecosystem. Our aim was to investigate three aspects of mangroves at a global scale: (1) their constituents (2) their indispensable ecological functions, and (3) the maintenance of their constituents and functions in degraded mangroves. We focused on answering two questions: “What is a mangrove ecosystem” and “How vulnerable are mangrove ecosystems to different impacts”? We invited 106 mangrove experts globally to participate in a survey based on the Delphi technique and provide inputs on the three aspects. The outputs from the Delphi technique for the third aspect, i.e. maintenance of constituents and functions were incorporated in a modeling approach to simulate the time frame for recovery. Presented here for the first time are the consensus definition of the mangrove ecosystem and the list of mangrove plant species. In this study, experts considered even monospecific (tree) stands to be a mangrove ecosystem as long as there was adequate tidal exchange, propagule dispersal, and faunal interactions. We provide a ranking of the important ecological functions, faunal groups, and impacts on mangroves. Degradation due to development was identified as having the largest impact on mangroves globally in terms of spatial scale...

A Model and Tools for Supporting Parallel Real-Time Applications in Unix Environments

Stevens, Luis F. ; Wisniewski, Robert W. (1968 - )
Fonte: University of Rochester. Computer Science Department. Publicador: University of Rochester. Computer Science Department.
Tipo: Relatório
ENG
Relevância na Pesquisa
36.02%
As real-time applications become more complex it is increasingly important to provide both a clean model for their development and the ability to verify that their execution matches the development model. In addition to becoming more complex, soft real-time programs are becoming more mainstream and are being run on platforms running some variant of Unix. It is even more important in these environments to be able to monitor a program and understand its behavior. We describe our frame scheduler, which provides a simple model to the real-time programmer while maintaining considerable flexibility. We motivate and describe the implementation of FrameView, a set of tools closely coupled with the frame scheduler. Since FrameView and the frame scheduler were developed in conjunction with each other, and are tightly coupled, they provide a powerful and efficient means for programmers to implement, analyze, and modify soft parallel real-time applications. The frame scheduler is fully implemented in IRIX 5.3, and FrameView is in beta release. In this paper we describe our experiences building and using the frame scheduler and FrameView.

Motion through time : Kujawy village mazurkas as a key to understanding rubato within the time frame of a bar in Chopin's mazurkas.

Steer, Catherine Joy
Fonte: Universidade de Adelaide Publicador: Universidade de Adelaide
Tipo: Tese de Doutorado
Publicado em //2004
Relevância na Pesquisa
46.07%
Rubato within the time frame of a bar in Chopin's mazurkas is a phenomenon which has long mystified musicians. When Chopin himself applied it to his mazurkas, the tempo subtly slowed down and, within the same bar, accelerated to make up for lost time, the first beat of the bar thus constantly arriving on time. In spite of extensive research into this type of rubato, there is still little known about it. This thesis therefore investigates the phenomenon. During a conversation with the German-born pianist Hallé, Chopin attributed ruhuto within the time frame of a bar in his mazurkas to the Polish mazurka itself. Significantly, of the various kinds of Polish mazurkas which Chopin encountered during his, only those from villages in the region of Kujawy, where he spent holidays as a youth, featured this type of ruhato. When it was applied to them, the tempo subtly slowed down and, within the same bar, accelerated to make up for lost time, just as in Chopin’s mazurkas. This was achieved, in the case of Kujawy village mazurkas, by close interaction between text, melody and dance movements as they moved through time together. Hence, this thesis argues that Kujawy village mazurkas, particularly the interaction there between text, melody and dance movements...

Chemical Reaction Dynamics at the Statistical Ensemble and Molecular Frame Limits

Clarkin, OWEN
Fonte: Quens University Publicador: Quens University
Tipo: Tese de Doutorado
EN; EN
Relevância na Pesquisa
35.93%
In this work, experimental and theoretical approaches are applied to the study of chemical reaction dynamics. In Chapter 2, two applications of transition state theory are presented: (1) Application of microcanonical transition state theory to determine the rate constant of dissociation of C2F3I after π∗ ← π excitation. It was found that this reaction has a very fast rate constant and thus is a promising system for testing the statistical assumption of molecular reaction dynamics. (2) A general rate constant expression for the reaction of atoms and molecules at surfaces was derived within the statistical framework of flexible transition state theory. In Chapter 4, a computationally efficient TDDFT approach was found to produce useful potential energy surface landscapes for application to non-adiabatic predissociative dynamics of the molecule CS2 after excitation from the ground state to the singlet C-state. In Chapter 5, ultrafast experimental results of excitation of CS2 to the predissociative neutral singlet C-state is presented. The bandwidth of the excitation laser was carefully tuned to span a two-component scattering resonance with each component differently evolving electronically with respect to excited state character during the quasi-bound oscillation. Scalar time-resolved photoelectron spectra (TRPES) and vector time-resolved photoelectron angular distribution (TRPAD) observables were recorded during the predissociation. The TRPES yield of photoelectrons was found to oscillate with a quantum beat pattern for the photoelectrons corresponding to ionization to the vibrationless cation ground state; this beat pattern was obscured for photoelectron energies corresponding to ionization from the vibrationally excited CS2 cation. The TRPAD data was recorded for two general molecular ensemble cases: with and without a pre-excitation alignment laser pulse. It was found that in the case of ensemble alignment (Chapter 6)...

Forecasting and Non-Stationarity of Surgical Demand Time Series

Moore, Ian
Fonte: Quens University Publicador: Quens University
Tipo: Tese de Doutorado
EN; EN
Relevância na Pesquisa
45.74%
Surgical scheduling is complicated by naturally occurring, and human-induced variability in the demand for surgical services. We used time series methods to detect, model and forecast these behaviors in surgical demand time series to help improve the scheduling of scarce surgical resources. With institutional approval, we studied 47,752 surgeries undertaken at a large academic medical center over a six-year time frame. Each daily sample in this time series represented the aggregate total hours of surgeries worked on a given day. Linear terms such as periodic cycles, trends, and serial correlations explained approximately 80 percent of the variance in the raw data. We used a moving variance filter to help explain away a large share of the heteroscedastic behavior mainly attributable to surgical activities on specific US holidays, which we defined as holiday variance. In the course of this research, we made a thoughtful attempt to understand the time series structure within our surgical demand data. We also laid a foundation, for further development, of two time series techniques, the multiwindow variance filter and cyclostatogram that can be applied not only to surgical demand time series, but also to other time series problems from other disciplines. We believe that understanding the non-stationarity...

The Force of Habit: A Study of Thematic Tradition in Globo Network’s Soap Operas per Time Frame; La fuerza de la costumbre: un estudio sobre la tradición temática de las telenovelas de la red Globo por franja horaria; A força do hábito: um estudo sobre a tradição temática das telenovelas da Rede Globo por faixa horária

Ferreira, Raquel Marques Carriço; Universidade Federal de Sergipe; Santana, Dhione Oliveira; Universidade Federal de Sergipe
Fonte: Universidad de la Sabana Publicador: Universidad de la Sabana
Tipo: info:eu-repo/semantics/article; Análise de Conteúdo; info:eu-repo/semantics/publishedVersion
POR
Relevância na Pesquisa
45.67%
The Brazilian soap operas have taken the attention of viewers worldwide, and the Globo, in particular, has been a major responsible for this success. In Brazil, the exhibitions of the global soap opera traditionally take place in three ranges of time, each one identifying with a specific public profile and thematic content. The objective of this research is to observe this tradition though the method of contend analysis in the last ten years (2001-2011).; Las telenovelas brasileñas han llamado la atención de los televidentes en todo el mundo, y la Rede Globo, en particular, ha sido una de las grandes responsables por ese éxito. En Brasil, las exhibiciones de las telenovelas de la Globo pasan tradicionalmente en tres horarios, diferenciándose entre sí por el perfil del raiting e por la exhibición de su contenido temático. El objetivo de esta investigación es observar tal tradición temática por medio del método de análisis de contenido de las producciones novelísticas realizadas entre 2001 e 2011.; As telenovelas brasileiras têm chamado a atenção dos telespectadores no mundo inteiro, e a Rede Globo, em particular, tem sido uma das grandes responsáveis por esse sucesso. No Brasil, as exibições das telenovelas globais acontecem tradicionalmente em três faixas de horários...

Interpreting the Consequences of Metformin Accumulation in an Emergency Context: Impact of the Time Frame on the Blood Metformin Levels

Lalau, Jean-Daniel; Kajbaf, Farshad
Fonte: Hindawi Publishing Corporation Publicador: Hindawi Publishing Corporation
Tipo: Artigo de Revista Científica
EN
Relevância na Pesquisa
45.86%
Objective. To clarify the link between metformin accumulation and its metabolic consequences by taking the time frame for metformin measurement into account. Research Design and Methods. Our database was studied for cases of metformin accumulation and lactic acidosis status available on admission, and then we selected patients in whom arterial pH, blood lactate, and plasma and erythrocyte metformin levels had been determined at the same time point. Results. Seventeen reports were studied on 16 patients, of whom 10 presented lactic acidosis. The time interval between admission and comprehensive testing ranged from 0 to 52 hours. The study parameters were determined simultaneously on admission in only 4 patients. In the 9 patients with lactic acidosis on admission and a delayed metformin assay, lactic acidosis persisted in 6 cases and had resolved in 3 cases by the time the blood sampling for metformin assay was performed. Conversely, lactic acidosis developed after admission in one case. Conclusions. Caution must be taken when interpreting the consequences of metformin accumulation in an emergency context: the patient's lactic acidosis status will have changed by the time the metformin assay is performed, even though metformin accumulation may still be present.

Real time and long term performance management metrics in mobile networks; Métricas de gestão de desempenho em tempo real e longo termo em redes móveis

Dias, Rodrigo Gouveia de Carvalho e Castro
Fonte: Universidade de Aveiro Publicador: Universidade de Aveiro
Tipo: Dissertação de Mestrado
ENG
Relevância na Pesquisa
45.72%
The Telecommunications industry is a “world” where services like data, voice and value-added services must be available at anytime, anywhere. Because of this requirement, it became a really aggressive market, where the least detail can make the difference. One of the details that can be really differentiating is related to network management. With all the changes and rapid evolution of telecommunications, this can be considered a critically important point. An efficient and optimized network management can save time and money and that is why it is a mandatory aspect in this market. There are two different paths to be considered: long term management, which consists in saving less detailed data for long periods of time, and real time management that allows much more detailed information for narrower time frame. Because of database and costs related issues, only one of them must be chosen and there is some important information that may become “invisible”, leading to unsolved problems that can be highly expensive. Regarding this situation, it would be extremely beneficial for the telecom operators if they could visualize both types of data, having the long term information along with the most important details of real time information in one view.; A indústria das Telecomunicações é um mundo onde os serviços de dados...

Effects of subconcussive head impacts on concussion symptoms, clinical reaction time, and oculomotor function in men's lacrosse players

Waer, Andrew E.
Fonte: University of Delaware Publicador: University of Delaware
Tipo: Tese de Doutorado
Relevância na Pesquisa
45.74%
Kaminski, Thomas W.; Context: To clinicians, researchers, and athletes alike, the recent evidence suggesting the detrimental effects of subconcussive head impacts (SCHI) in collision sport athletes is alarming. The sport of lacrosse like football, ice hockey, and soccer, has a high-risk for sport-related concussions (SRC). However, there is paucity in research examining male lacrosse players despite the high risk for SRC and the opportunity for repeated SCHI to the helmet during competition. Unlike American football, unique to the sport of lacrosse is the fact that they are often asked to play games with minimal rest periods in between which provides for a chance to study SCHI in this population during a truncated week of competition. Objective: The primary goal of this study was to examine if SCHI had an effect on concussion-related symptoms, clinical reaction time, and oculomotor function in men's lacrosse players (MLAX) in a shortened time frame between two regularly scheduled games (Wednesday and Saturday). Design: Two-group pretest-posttest design. Setting: Quiet, climate-controlled research laboratory. Patients or Other Participants: Subjects consisted of 18 men's (height=181.3??6.6cm, mass=86.3??6.4kg, age=20.6??1.3yrs.) and 13 women's (height=168.6??6.0cm...