Results 221 to 230 of about 82,350 (250)
Some of the next articles are maybe not open access.
ACM SIGMOD Record, 2004
Sensor devices are promising to revolutionize our interaction with the physical world by allowing continuous monitoring and reaction to natural and artificial processes at an unprecedented level of spatial and temporal resolution. As sensors become smaller, cheaper and more configurable, systems incorporating large numbers of them become ...
Iosif Lazaridis +6 more
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Sensor devices are promising to revolutionize our interaction with the physical world by allowing continuous monitoring and reaction to natural and artificial processes at an unprecedented level of spatial and temporal resolution. As sensors become smaller, cheaper and more configurable, systems incorporating large numbers of them become ...
Iosif Lazaridis +6 more
openaire +2 more sources
Applied Optics, 1966
A short historical outline of the discovery and a description of observed properties of quasars introduces questions as to their nature. Some of the principal arguments concerning their reality, distance, intrinsic properties and age lead to the conclusion that, while there is room for other points of view; a strong case can be made for the ...
openaire +2 more sources
A short historical outline of the discovery and a description of observed properties of quasars introduces questions as to their nature. Some of the principal arguments concerning their reality, distance, intrinsic properties and age lead to the conclusion that, while there is room for other points of view; a strong case can be made for the ...
openaire +2 more sources
Quasars: The Observational Perspectives
2012The empirical basis of quasar astronomy can be overawing especially in the twenty-first century. A first source of intricacy involves the nomenclature that has evolved to label the multifold phenomenological manifestations now united under the umbrella of active galactic nuclei (AGNs). A further complication involves observations of the many subclasses
D'ONOFRIO, MAURO +23 more
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ACM SIGPLAN Notices, 2014
Cloud computing promises flexibility and high performance for users and high cost-efficiency for operators. Nevertheless, most cloud facilities operate at very low utilization, hurting both cost effectiveness and future scalability. We present Quasar, a cluster management system that increases resource utilization while providing consistently
Christina Delimitrou, Christos Kozyrakis
openaire +1 more source
Cloud computing promises flexibility and high performance for users and high cost-efficiency for operators. Nevertheless, most cloud facilities operate at very low utilization, hurting both cost effectiveness and future scalability. We present Quasar, a cluster management system that increases resource utilization while providing consistently
Christina Delimitrou, Christos Kozyrakis
openaire +1 more source
Science, 1982
The observed absence of quasar redshifts larger than 3.53 is erroneously attributed to Richard Green and myself in "A boundary for the quasars" (Research News, 22 Jan., p. 388). Our survey of bright quasars does not cover redshifts larger than 2.2 because in choosing candidates we rely on the ultraviolet excess, which tends to disappear at larger ...
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The observed absence of quasar redshifts larger than 3.53 is erroneously attributed to Richard Green and myself in "A boundary for the quasars" (Research News, 22 Jan., p. 388). Our survey of bright quasars does not cover redshifts larger than 2.2 because in choosing candidates we rely on the ultraviolet excess, which tends to disappear at larger ...
openaire +3 more sources
Proceedings of the 33rd Annual Computer Security Applications Conference, 2017
Computer security has long been an arms race between attacks and defenses. While new defenses are proposed and built to stop specific vectors of attacks, novel, sophisticated attacks are devised by attackers to bypass them. This rapid cycle of defenses and attacks has made it difficult to strategically reason about the protection offered by each ...
Richard Skowyra +4 more
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Computer security has long been an arms race between attacks and defenses. While new defenses are proposed and built to stop specific vectors of attacks, novel, sophisticated attacks are devised by attackers to bypass them. This rapid cycle of defenses and attacks has made it difficult to strategically reason about the protection offered by each ...
Richard Skowyra +4 more
openaire +1 more source
Science, 1964
Rotation in addition to free gravitational motion can produce oscillations in a large spherical mass of gas. The theory may provide an explanation of the variations of brightness in such objects as 3C273.
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Rotation in addition to free gravitational motion can produce oscillations in a large spherical mass of gas. The theory may provide an explanation of the variations of brightness in such objects as 3C273.
openaire +2 more sources