28 research outputs found

    FRBR, Facets, and Moving Images: A Literature Review

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    Annotated bibliography on resources related to FBRB, facets and moving images

    Rotation and translation effects on stereoscopic acuity

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    This study examined the effects of rotation or translation on the detectability of a dotted target plane embedded in a dotted masking cube. Julesz-type stereograms were generated in real time, using a small laboratory computer. Subjects displayed an excellent ability to compensate for x-y projected density variations produced by changes in the angle of rotation of the target plane so that performance was equal at all rotations. This finding indicates that dot density is being processed in a three- rather than a two-dimensional manner. Translation of a frontoparallel plane from the back of the stereoscopically defined cube to its front produced systematic changes in performance. Performance was best at the central fixation distance and decreased as either crossed or uncrossed disparity increased. Thus, it appears that stereo acuity decreases symmetrically with increases in disparity in either direction.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/22020/1/0000436.pd

    OLAC CAPC Moving Image Work-Level Records Task Force Report and Recommendations, Part I: Moving Image Work Definition and Boundaries, Part II: Core Attributes and Relationships

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    The Moving Image Work-Level Records Task Force of Online Audiovisual Catalogers (OLAC) Cataloging Policy Committee (CAPC) was charged with investigating and making recommendations on issues related to FRBR-based work-level records for moving image materials, including, but not limited to: Identifying characteristics of moving image works (possibly with some indication of relative importance) that should be included in work-level records and creating operational definitions of these characteristics. Identifying potential sources of information about these characteristics and examining the reliability of these sources. Examining existing bibliographic records to identify places where work-level information might be recorded and investigating the possibility of extracting information from pools of existing bibliographic records to create provisional work-level records

    OLAC CAPC Moving Image Work-Level Records Task Force Draft Report and Recommendations, Part I: Moving Image Work Definition and Boundaries, Part II: Core Attributes and Relationships

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    The Moving Image Work-Level Records Task Force of Online Audiovisual Catalogers (OLAC) Cataloging Policy Committee (CAPC) was charged with investigating and making recommendations on issues related to FRBR-based work-level records for moving image materials, including, but not limited to: Identifying characteristics of moving image works (possibly with some indication of relative importance) that should be included in work-level records and creating operational definitions of these characteristics. Identifying potential sources of information about these characteristics and examining the reliability of these sources. Examining existing bibliographic records to identify places where work-level information might be recorded and investigating the possibility of extracting information from pools of existing bibliographic records to create provisional work-level records

    OLAC CAPC Moving Image Work-Level Records Task Force Final Report and Recommendations, Part IV: Extracting Work-Level Information from Existing MARC Manifestation Records

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    This subgroup of the Moving Image Work-Level Records Task Force of Online Audiovisual Catalogers (OLAC) Cataloging Policy Committee (CAPC) was charged with identifying places in MARC manifestation-level bibliographic records where work-level information may be encoded and examining a sample of MARC records to see how reliably this information might be extrapolated from existing records. Currently we do not have work-level records for moving images, except for a relatively small number of uniform title authority records, which usually contain only title information. Moving image uniform title authority records usually represent works, but tend to include only enough information to uniquely identify the work or expression rather than a more complete description. However, information about moving image works is often embedded in our current manifestation-level bibliographic records. If we wish to move to an environment where we create and share work-level records for moving images, it would be helpful if we could use automated means to extract data from existing bibliographic records to populate provisional work-level records. These provisional records could later be enhanced, verified and corrected by human beings. Therefore, we are interested in determining the extent to which it is possible to accurately extract work-level information from existing bibliographic records

    OLAC CAPC Moving Image Work-Level Records Task Force Final Report and Recommendations, Part IIIa: Operational Definitions: A Thought Experiment

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    This first section of part three examines the types of information and guidance that will be needed by catalogers in order to create, enhance, correct, and maintain work/primary expression records for moving images, which we have often referred to as work records for short

    OLAC CAPC Moving Image Work-Level Records Task Force Final Report and Recommendations, Part IIIb: Data Sources

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    This second section of part three examines a number of primary and secondary sources that include information about moving images works and provides brief annotations of coverage, assessment of reliability, and a list of elements covered in each source. Print, and free and subscription online sources are included. Information about these sources is being entered into a relational database in the hope that it can be made available on the web in a flexible manner (e.g., by element covered, types of works covered, level of reliability, online vs. print)

    Nonlinear analysis of EEG signals at different mental states

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    BACKGROUND: The EEG (Electroencephalogram) is a representative signal containing information about the condition of the brain. The shape of the wave may contain useful information about the state of the brain. However, the human observer can not directly monitor these subtle details. Besides, since bio-signals are highly subjective, the symptoms may appear at random in the time scale. Therefore, the EEG signal parameters, extracted and analyzed using computers, are highly useful in diagnostics. This work discusses the effect on the EEG signal due to music and reflexological stimulation. METHODS: In this work, nonlinear parameters like Correlation Dimension (CD), Largest Lyapunov Exponent (LLE), Hurst Exponent (H) and Approximate Entropy (ApEn) are evaluated from the EEG signals under different mental states. RESULTS: The results obtained show that EEG to become less complex relative to the normal state with a confidence level of more than 85% due to stimulation. CONCLUSIONS: It is found that the measures are significantly lower when the subjects are under sound or reflexologic stimulation as compared to the normal state. The dimension increases with the degree of the cognitive activity. This suggests that when the subjects are under sound or reflexologic stimuli, the number of parallel functional processes active in the brain is less and the brain goes to a more relaxed stat

    Do Gravity-Related Sensory Information Enable the Enhancement of Cortical Proprioceptive Inputs When Planning a Step in Microgravity?

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    International audienceWe recently found that the cortical response to proprioceptive stimulation was greater when participants were planning a step than when they stood still, and that this sensory facilitation was suppressed in microgravity. The aim of the present study was to test whether the absence of gravity-related sensory afferents during movement planning in microgravity prevented the proprioceptive cortical processing to be enhanced. We reestablished a reference frame in microgravity by providing and translating a horizontal support on which the participants were standing and verified whether this procedure restored the proprioceptive facilitation. The slight translation of the base of support (lateral direction), which occurred prior to step initiation, stimulated at least cutaneous and vestibular receptors. The sensitivity to proprioceptive stimulation was assessed by measuring the amplitude of the cortical somatosensory-evoked potential (SEP, over the Cz electrode) following the vibration of the leg muscle. The vibration lasted 1 s and the participants were asked to either initiate a step at the vibration offset or to remain still. We found that the early SEP (90–160 ms) was smaller when the platform was translated than when it remained stationary, revealing the existence of an interference phenomenon (i.e., when proprioceptive stimulation is preceded by the stimulation of different sensory modalities evoked by the platform translation). By contrast, the late SEP (550 ms post proprioceptive stimulation onset) was greater when the translation preceded the vibration compared to a condition without pre-stimulation (i.e., no translation). This suggests that restoring a body reference system which is impaired in microgravity allowed a greater proprioceptive cortical processing. Importantly, however, the late SEP was similarly increased when participants either produced a step or remained still. We propose that the absence of step-induced facilitation of proprioceptive cortical processing results from a decreased weight of proprioception in the absence of balance constraints in microgravity
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