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11.
Purver Matthew Sadrzadeh Mehrnoosh Kempson Ruth Wijnholds Gijs Hough Julian 《Journal of Logic, Language and Information》2021,30(2):379-406
Journal of Logic, Language and Information - Despite the incremental nature of Dynamic Syntax (DS), the semantic grounding of it remains that of predicate logic, itself grounded in set theory, so... 相似文献
12.
Joachim Meyer Yuval Bitan David Shinar 《International journal of human-computer interaction》2013,29(3):273-290
Two experiments assessed the effect of displaying a boundary on duration estimates and preference ratings for dynamic displays that were shown while users waited for the system's response. Displays were either symbolic (changing numbers) or graphic (increasing rectangles) and could contain a boundary that indicated when the interval was expected to be over. Duration estimates were similar for symbolic and graphic displays and for displays with and without a boundary. However, when the displays were encountered successively, participants assessed the graphic displays as having shorter durations than the symbolic displays. Faster rates of change in both types of displays led to increased duration estimates. Although displaying a boundary did not affect duration estimates, participants preferred displays in which a boundary was shown and preferred the graphic displays over the symbolic displays. Hence, bounded graphic displays are recommended as “wait” displays for computerized applications. 相似文献
13.
IT infrastructure is definitely going green. From significant new regulations for IT equipment disposal to stringent energy-efficiency specifications for PCs and monitors to national standards for data center power savings, Green IT is an "in" topic. But many problems are unsolved. Will telecommuting make a difference or is it too difficult to manage? Will cloud computing reduce the number of large data centers? Can legislation diminish e-waste challenges? 相似文献
14.
Jens Hauslage Medea Abbrecht Lars Hanke Ruth Hemmersbach Claudia Koch Wolfgang Hanke Florian P. M. Kohn 《Microgravity science and technology》2016,28(6):633-638
All life on earth has been established under conditions of stable gravity of 1g. Nevertheless, in numerous experiments the direct gravity dependence of biological processes has been shown on all levels of organization, from single molecules to humans. To study the effects especially of microgravity on biological systems, a variety of platforms are available, from drop towers to the ISS. Due to the costs of these platforms and their limited availability, as an alternative, numerous simulators have been developed for so called “simulated” microgravity. A classical systems is a clinostat, basically rotating a sample around one axis, and by integration of the gravity vector for 360° arguing that thus the effects of gravity are depleted. Indeed, a variety of studies has shown that taking out the direction of gravity from a biological system often results in consequences similar to the exposure of the system to real microgravity. Nevertheless, the opposite has been shown, too, and as a consequence the relevance of clinostats in microgravity research is still under discussion. To get some more insight into this problem we have constructed a small fluorescence clinostat and have studied the effects of clinorotation on the cytosolic calcium concentration of neuroglioma cells. The results have been compared to experiments with identical cells in real microgravity, utilizing parabolic flight missions. Our results show that in case of a cell suspension used in a small florescence clinostat within a tube diameter of 2mm, the effects of clinorotation are comparable to those under real microgravity, both showing a significant increase in intracellular calcium concentration. 相似文献
15.
16.
Manoli Pifarre Ruth Cobos 《International Journal of Computer-Supported Collaborative Learning》2010,5(2):237-253
This paper aims to better understand the development of students’ metacognitive learning processes when participating actively
in a CSCL system called KnowCat. To this end, a longitudinal case study was designed, in which 18 university students took
part in a 12-month (two semesters) learning project. The students followed an instructional process, using specific features
of the KnowCat design to support and improve their interaction processes, especially peer-learning processes. Our research
involved both supervising the students’ collaborative learning processes throughout the learning project and focusing our
analysis on the qualitative evolution of their interaction processes and of their metacognitive learning processes. The results
of the current research suggest that the pedagogical use of the KnowCat system may favour and improve the development of the
students’ metacognitive learning processes. In addition, the implications of the design of CSCL networks and related pedagogical
issues are discussed. 相似文献
17.
Centralized heavyweight collectors have been used to collect text-based web objects for building search engines. However,
these collectors do not meet the need of collecting big web objects such as images and videos. We propose a lightweight mobile
on-call object collector for the world wide web. Using this approach, we can deploy a collector easily on the site being indexed.
We present a prototype system consisting of mobile Java collectors and search engines for collecting HTML/image objects. We
provide analysis to find a lower bound in terms of total data transfer time required. This idealized scenario is complemented
with another model based on implementation of the HTTP over TCP. The lower bound and the upper bound of the gains accrued
are then validated using experiments.
This revised version was published online in August 2006 with corrections to the Cover Date. 相似文献
18.
Ruth F. Curtain 《Automatica》2012,48(1):139-144
Recently, the class of spatially invariant systems was introduced with motivating examples of partial differential equations on an infinite domain. For these it was shown that by taking Fourier transforms, one obtains infinitely many finite-dimensional systems with a scalar parameter. The idea is that, for the LQR controller design for these systems, one can solve the parameterized LQR-Riccati equation pointwise. While for simple first order systems like the heat equations this approach works, for second order systems like wave or beam equations it is easy to construct examples for which this approach fails. Here we give a correct formulation for second order partial differential systems including wave and beam type equations. 相似文献
19.
Jacob Theodore; Fagin Robert; Perry Joseph; Van Dyke Ruth A. 《Canadian Metallurgical Quarterly》1975,11(3):393
Upper-, middle-, and lower-class parents were asked to explain a proverb which had both "growth" and "stability" interpretations to their 11- and 16-yr-old sons. The growth interpretation was overwhelmingly endorsed by most parents. With 16-yr-olds, lower-middle-class parents continued to endorse the growth interpretation; most upper-class parents endorsed the stability interpretation. (PsycINFO Database Record (c) 2010 APA, all rights reserved) 相似文献
20.
Balsam Kimberly F.; Beauchaine Theodore P.; Mickey Ruth M.; Rothblum Esther D. 《Canadian Metallurgical Quarterly》2005,114(3):471
Self-identified lesbian, gay male, and bisexual (LGB) individuals were recruited via convenience sampling, and they in turn recruited their siblings (79% heterosexual, 19% LGB). The resulting sample of 533 heterosexual, 558 lesbian or gay male, and 163 bisexual participants was compared on mental health variables and their use of mental health services. Multilevel modeling analyses revealed that sexual orientation predicted suicidal ideation, suicide attempts, self-injurious behavior, use of psychotherapy, and use of psychiatric medications over and above the effects of family adjustment. Sexual orientation was unrelated to current psychological distress, psychiatric hospitalizations, and self-esteem. This is the 1st study to model family effects on the mental health of LGB participants and their siblings. (PsycINFO Database Record (c) 2010 APA, all rights reserved) 相似文献