Institution
Concordia University
Education•Montreal, Quebec, Canada•
About: Concordia University is a education organization based out in Montreal, Quebec, Canada. It is known for research contribution in the topics: Control theory & Population. The organization has 13565 authors who have published 31084 publications receiving 783525 citations. The organization is also known as: Sir George Williams University & Loyola College, Montreal.
Papers published on a yearly basis
Papers
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25 Aug 1997TL;DR: A multi-dimensional database model is presented, which is believed to serve as a conceptual model for On-Line Analytical Processing (OLAP)-based applications and it is shown that the data cube operator can be expressed easily.
Abstract: We present a multi-dimensional database model, which we believe can serve as a conceptual model for On-Line Analytical Processing (OLAP)-based applications. Apart from providing the functionalities necessary for OLAP-based applications, the main feature of the model we propose is a clear separation between structural aspects and the contents. This separation of concerns allows us to define data manipulation languages in a reasonably simple, transparent way. In particular, we show that the data cube operator can be expressed easily. Concretely, we define an algebra and a calculus and show them to be equivalent. We conclude by comparing our approach to related work. The conceptual multi-dimensional database model developed here is orthogonal to its implementation, which is not a subject of the present paper.
355 citations
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TL;DR: DA seems to be critically involved in mediation of the reinforcing effects of amphetamine, as it differentially affected amphetamine self-administration and caused periods of increased rate of responding for amphetamine which were followed, in the case of higher doses, by response cessation.
Abstract: Norepinephrine (NE) and dopamine (DA) receptor blockade differentially affected amphetamine self-administration. DA blockade (pimozide, 0.0625 to 0.5 mg/kg, or (+)-butaclamol, 0.0125 to 0.1 mg/kg) caused periods of increased rate of responding for amphetamine which were followed, in the case of higher doses, by response cessation. The response cessation produced by 0.5 mg/kg pimozide was not reversed by non-contingent amphetamine injections until well after the peak effect of the pimozide was over. When access to amphetamine injections was delayed until 4 h after animals received 0.5 mg/kg pimozide, rate of responding was elevated. Thus DA seems to be critically involved in mediation of the reinforcing effects of amphetamine. Alpha-NE blockade with phentolamine (2.5–10 mg/kg) produced dose-related decreases in responding; blockade with phenoxybenzamine (1.25–10 mg/kg) had no effect. Beta-NE blockade with l-propranolol (2.5–10 mg/kg) decreased responding, although probably not through a beta-blocking action. The effects of phentolamine and propranolol do not appear to result from attenuation of the reinforcing effects of amphetamine.
354 citations
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16 Jul 2000TL;DR: In this article, the authors discuss the potential of distributed generation (DG) to provide some of these services, such as voltage sag compensation and harmonic filtering, and the implications on the design of the power converter interface are discussed.
Abstract: The growing concerns regarding electric power quality and availability have led to the installation of more and more distributed generation. In parallel and in the context of an accelerating trend towards deregulation of the electric industry, the unbundling of services, many grouped under ancillary services, should create a market for some of these services. This paper discusses the potential of distributed generation (DG) to provide some of these services. In particular, DG can serve locally as the equivalent of a spinning reserve and voltage support of the AC bus. The main types of distributed generation with emphasis on the power electronic interface and the configurations appropriate to provide ancillary services are reviewed. The flexibility and features provided by the power electronic interface are illustrated. In addition to control of the real power, other functions can be incorporated into the design of the interface to provide services, such as reactive power, and resources associated with power quality. These include voltage sag compensation and harmonic filtering. The implications on the design of the power converter interface are discussed.
351 citations
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TL;DR: A theory focused meta-analysis of 275 effects from 153 studies revealed positive but small associations between absenteeism and work strain, psychological illness, and physical illness.
Abstract: Work strain has been argued to be a significant cause of absenteeism in the popular and academic press. However, definitive evidence for associations between absenteeism and strain is currently lacking. A theory focused meta-analysis of 275 effects from 153 studies revealed positive but small associations between absenteeism and work strain, psychological illness, and physical illness. Structural equation modeling results suggested that the strain-absence connection may be mediated by psychological and physical symptoms. Little support was received for the purported volitional distinction between absence frequency and time lost absence measures on the basis of illness. Among the moderators examined, common measurement, midterm and stable sources of variance, and publication year received support.
350 citations
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Utrecht University1, United States Department of Energy2, National Autonomous University of Mexico3, National and Kapodistrian University of Athens4, University of Debrecen5, Commonwealth Scientific and Industrial Research Organisation6, Leiden University7, Maynooth University8, University of Göttingen9, University of Natural Resources and Life Sciences, Vienna10, University of Seville11, Broad Institute12, Huazhong Agricultural University13, State University of Campinas14, International Sleep Products Association15, Université libre de Bruxelles16, University of Nottingham17, Aix-Marseille University18, Pasteur Institute19, King Abdulaziz University20, Institut national de la recherche agronomique21, University of Helsinki22, University of Amsterdam23, University of Ioannina24, University of St Andrews25, Saint Petersburg State University26, Spanish National Research Council27, Federal University of São Carlos28, Swedish University of Agricultural Sciences29, Technical University of Berlin30, National Scientific and Technical Research Council31, Concordia University32, Kyungpook National University33, University of the Republic34, Karlsruhe Institute of Technology35, University of Sulaymaniyah36, University of Ljubljana37, Leibniz Association38, Stanford University39, Kansas State University40, Technical University of Denmark41, University of Wisconsin-Madison42, Pacific Northwest National Laboratory43, University of Jena44, University of São Paulo45, University of Kansas46, Université Paris-Saclay47, Imperial College London48, Vienna University of Technology49
TL;DR: In this article, a comparative genomics and experimental study of the aspergilli genus is presented, which allows for the first time a genus-wide view of the biological diversity of the Aspergillus and in many, but not all, cases linked genome differences to phenotype.
Abstract: Background: The fungal genus Aspergillus is of critical importance to humankind. Species include those with industrial applications, important pathogens of humans, animals and crops, a source of potent carcinogenic contaminants of food, and an important genetic model. The genome sequences of eight aspergilli have already been explored to investigate aspects of fungal biology, raising questions about evolution and specialization within this genus. Results: We have generated genome sequences for ten novel, highly diverse Aspergillus species and compared these in detail to sister and more distant genera. Comparative studies of key aspects of fungal biology, including primary and secondary metabolism, stress response, biomass degradation, and signal transduction, revealed both conservation and diversity among the species. Observed genomic differences were validated with experimental studies. This revealed several highlights, such as the potential for sex in asexual species, organic acid production genes being a key feature of black aspergilli, alternative approaches for degrading plant biomass, and indications for the genetic basis of stress response. A genome-wide phylogenetic analysis demonstrated in detail the relationship of the newly genome sequenced species with other aspergilli. Conclusions: Many aspects of biological differences between fungal species cannot be explained by current knowledge obtained from genome sequences. The comparative genomics and experimental study, presented here, allows for the first time a genus-wide view of the biological diversity of the aspergilli and in many, but not all, cases linked genome differences to phenotype. Insights gained could be exploited for biotechnological and medical applications of fungi.
349 citations
Authors
Showing all 13754 results
Name | H-index | Papers | Citations |
---|---|---|---|
Alan C. Evans | 183 | 866 | 134642 |
Michael J. Meaney | 136 | 604 | 81128 |
Chao Zhang | 127 | 3119 | 84711 |
Charles Spence | 111 | 949 | 51159 |
Angappa Gunasekaran | 101 | 586 | 40633 |
Kaushik Roy | 97 | 1402 | 42661 |
Muthiah Manoharan | 96 | 497 | 44464 |
Stephen J. Simpson | 95 | 490 | 30226 |
Roy A. Wise | 95 | 252 | 39509 |
Dario Farina | 94 | 832 | 32786 |
Yavin Shaham | 94 | 239 | 29596 |
Elazer R. Edelman | 89 | 593 | 29980 |
Fikret Berkes | 88 | 271 | 49585 |
Ke Wu | 87 | 1242 | 33226 |
Nick Serpone | 85 | 474 | 30532 |