Detecting stable phase structures in EEG signals to classify brain activity amplitude patterns     

Yusely Ruiz  Guang Li  Walter J. Freeman  Eduardo Gonzalez 《浙江大学学报(A卷英文版)》2009,10(10):1483-1491

Obtaining an electrocorticograms （ECoG） signal requires an invasive procedure in which brain activity is recorded from the cortical surface. In contrast, obtaining electroencephalograms （EEG） recordings requires the non-invasive procedure of recording the brain activity from the scalp surface, which allows EEG recordings to be performed more easily on healthy humans. In this work, a technique previously used to study spatial-temporal patterns of brain activity on animal ECoG was adapted for use on EEG. The main issues are centered on solving the problems introduced by the increment on the interelectrode distance and the procedure to detect stable frames. The results showed that spatial patterns of beta and gamma activity can also be extracted from the EEG signal by using stable frames as time markers for feature extraction. This adapted technique makes it possible to take advantage of the cognitive and phenomenological awareness of a normal healthy subject.  相似文献   

EES and the continuing evolution of Research Policy     

Ben R. Martin  Martin Bell  Hariolf Grupp  Fumio Kodama  Lee Fleming  Walter Powell 《Research Policy》2009,38(5):695-699

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Finding a Better Person-Environment Fit in the Academic Deanship     

Mimi Wolverton  Walter Gmelch  Marvin L. Wolverton 《Innovative Higher Education》2000,24(3):203-226

Individuals seek a balance between the demands of their institutions and the dimensions that make up their personalities and determine their needs (Getzels & Guba, 1957). Academic deans are no exception. Indeed, the fit (or lack of it) between the work environment and the unique characteristics of individuals asked to function within a given setting helps determine whether they experience levels of stress that move them forward in their work or suffer debilitating stress that leads to excessive physical and mental strain. This article examines the fit between academic deans and their work environments in the U.S. and Australia as it relates to multiple role stress factors affecting deans.  相似文献   

The effect of national culture on partner buyouts in cross-border biotechnology alliances     

Timothy B. Folta  Walter J. Ferrier 《The Journal of High Technology Management Research》2000,11(2):175-198

This study examines how national culture influences the likelihood and rate of buyouts among R&D equity alliances and joint ventures in the biotechnology industry. We hypothesize that the interaction of specific national culture attributes and cultural differences between alliance partners have an impact on: (1) the amount of endogenous uncertainty surrounding the potential integration of the target firm and (2) the marginal rate of learning in hierarchical versus collaborative governance. Applying a competing hazard model to a sample of 173 joint ventures and minority equity collaborations in the biotechnology industry, we found that investing firms from high power distance and high uncertainty avoidance countries are more likely to buy out their alliance partners. Furthermore, greater cultural distance between alliance partners increases the likelihood of partner buyout when investing firms are from high power distance countries.  相似文献   

Bernard Rouget and Dominique Sagot-Duvaroux, Economie des Arts Plastiques - Une Analise de la Méditation Culturelle     

Walter Santagata 《Journal of Cultural Economics》1997,21(2):161-163

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The Giving Tree or there is a sucker born every minute     

Walter L. Strandburg  Norma J. Livo 《Children‘s Literature in Education》1986,17(1):17-24

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An analysis of a sample of the learner verification and revision reports submitted to the Florida Department of Education in 1985–86     

Walter Dick 《Publishing Research Quarterly》1986,2(4):3-14

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Administrator stress and coping effectiveness: Implications for administrator evaluation and development     

Walter H. Gmelch  Wilbert Chan 《Journal of Personnel Evaluation in Education》1995,9(3):275-285

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The traditions of the university in the face of the demands of the twenty-first century     

Walter Rüegg 《Minerva》1992,30(2):189-205

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The role of number and spacing of CS-US pairings in conditioned suppression     

James P. James  Lennard Shangi  Clare Pangman  Walter Mostoway 《Learning & behavior》1973,1(2):140-144

In four studies, with rats as Ss. acquisition and. where appropriate, extinction trials were presented against a baseline of ongoing licking. At shock intensities of 0.1. 0.5. 1.0, or 2.0 mA, acquisition performance was a function of number of CS-US pairings: spacing of trials (one or two per day) did not affect acquisition performance. Resistance to extinction could be predicted from terminal acquisition performance and reached a maximum after three CS-US pairings.  相似文献