New results on Bs mixing and CP violation from LHCb
by Xie Yuehong
Oscillation effects in the Bs meson system provide a window on physics beyond the Standard Model. The latest results from LHCb on the mass and width differences between the two physical eigenstates, and the CP violating phase measured in the Bs -> J/psi phi decay channel are presented. In addition, results of a first study of the CP violating phase in the penguin-dominated Bs -> phiphi decays are shown.
New results on Bs mixing and CP violation from LHCb
Oscillation effects in the Bs meson system provide a window on physics beyond the Standard Model. The latest results from LHCb on the mass and width differences between the two physical eigenstates, and the CP violating phase measured in the Bs -> J/psi phi decay channel are presented. In addition, results of a first study of the CP violating phase in the penguin-dominated Bs -> phiphi decays are shown.
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ADS Fission in a Molten Salt Core: Destroy Transuranics in Spent Nuclear Fuel, Close the Nuclear Fuel Cycle
by McIntyre Peter
The transuranic elements in spent nuclear fuel are the most enduring hazard of nuclear power. They have immense radiotoxicity, enough to jeopardize all life on Earth if they entered the biosphere, they have half-lives of hundreds of thousands of years, and each power reactor produces half a ton of transuranics per year.
Innovations in pyroprocessing, accelerator physics, core neutronics, and actinide safeguards make it possible to make accelerator-driven subcritical fission in a molten salt cor...
ADS Fission in a Molten Salt Core: Destroy Transuranics in Spent Nuclear Fuel, Close the Nuclear Fuel Cycle
The transuranic elements in spent nuclear fuel are the most enduring hazard of nuclear power. They have immense radiotoxicity, enough to jeopardize all life on Earth if they entered the biosphere, they have half-lives of hundreds of thousands of years, and each power reactor produces half a ton of transuranics per year.
Innovations in pyroprocessing, accelerator physics, core neutronics, and actinide safeguards make it possible to make accelerator-driven subcritical fission in a molten salt core (ADSMS) with which the transuranics can be safely destroyed by fission at the same rate they are produced in conventional power reactors. In ADSMS intense proton beams are produced by strong-focusing cyclotrons and delivered into a molten salt core. The core operates with a criticality of 0.96 – the proton driver must supply 4% of the neutrons needed to sustain fission. The protons produce fast neutrons in the core by spallation and drive fission. The core is designed with the ultra-fast neutronics needed to fission the transuranics, and no failure mode can induce criticality.
The ADSMS technology will be described. Applications of the accelerator technology for proton beam gantries for cancer therapy and for neutron damage studies will be presented.
Coffee / tea will be served after the seminar in the 'Pas Perdus'
ATS Seminars Organisers:
H. Burkhardt (BE) T. Stora (EN), G. De Rijk (TE)
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Scientific Data Bases at Scale and SciDB
by Dr. Stonebraker Michael
Abstract:
As a general rule, scientists have shunned relational data management systems (RDBMS), choosing instead to “roll their own” on top of file system technology. We first discuss why file systems are a poor choice for science data storage, especially as data volumes become large and scalability becomes important.
Then, we continue with the reasons why RDBMSs work poorly on most science applications. These include a data model “impedance mismatch&r...
Abstract:
As a general rule, scientists have shunned relational data management systems (RDBMS), choosing instead to “roll their own” on top of file system technology. We first discuss why file systems are a poor choice for science data storage, especially as data volumes become large and scalability becomes important.
Then, we continue with the reasons why RDBMSs work poorly on most science applications. These include a data model “impedance mismatch” and missing features. We discuss array DBMSs, and why they are a much better choice for science applications, and use SciDB as an exemplar of this new class of DBMSs.
Most science applications require a mix of data management and complex analytics. In most cases, the analytics entail a sequence of linear algebra computations. We discuss the possible ways of integrating a DBMS with statistical calculations, and conclude with the mechanism being used by SciDB.
Bio:
Dr. Stonebraker has been a pioneer of data base research and technology for more than a quarter of a century. He was the main architect of the INGRES relational DBMS, and the object-relational DBMS, POSTGRES. These prototypes were developed at the University of California at Berkeley where Stonebraker was a Professor of Computer Science for twenty five years. More recently at M.I.T. he was a co-architect of the Aurora/Borealis stream processing engine, the C-Store column-oriented DBMS, and the H-Store transaction processing engine. Currently, he is working on science-oriented DBMSs, OLTP DBMSs, and scalable data curation. He is the founder of five venture-capital backed startups, which commercialized his prototypes. Presently he serves as Chief Technology Officer of VoltDB and Paradigm4, Inc.
Professor Stonebraker is the author of scores of research papers on data base technology, operating systems and the architecture of system software services. He was awarded the ACM System Software Award in 1992, for his work on INGRES. Additionally, he was awarded the first annual Innovation award by the ACM SIGMOD special interest group in 1994, and was elected to the National Academy of Engineering in 1997. He was awarded the IEEE John Von Neumann award in 2005, and is presently an Adjunct Professor of Computer Science at M.I.T, where he is co-director of the new Intel Science and Technology Center focused on big data.
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Hidden in the Clouds: New Ideas in Cloud Computing
by Dr. Shevek
Abstract:
Cloud computing has become a hot topic. But 'cloud' is no newer in 2013 than MapReduce was in 2005: We've been doing both for years. So why is cloud more relevant today than it ever has been?
In this presentation, we will introduce the (current) central thesis of cloud computing, and explore how and why (or even whether) the concept has evolved.
While we will cover a little light background, our primary focus will be on the consequences, corollaries and techniques...
Hidden in the Clouds: New Ideas in Cloud Computing
Abstract:
Cloud computing has become a hot topic. But 'cloud' is no newer in 2013 than MapReduce was in 2005: We've been doing both for years. So why is cloud more relevant today than it ever has been?
In this presentation, we will introduce the (current) central thesis of cloud computing, and explore how and why (or even whether) the concept has evolved.
While we will cover a little light background, our primary focus will be on the consequences, corollaries and techniques introduced by some of the leading cloud developers and organizations.
We each have a different deployment model, different applications and workloads, and many of us are still learning to efficiently exploit the platform services offered by a modern implementation. The discussion will offer the opportunity to share these experiences and help us all to realize the benefits of cloud computing to the fullest degree.
Please bring questions and opinions, and be ready to share both!
Bio:
Shevek is a principal architect at Nebula, and an expert programmer with a strong interest in parallel and distributed systems. He has worked on cutting edge research in compilers and language design, algorithmic optimization, systems and security. He is capable of maintaining a very straight face under questioning on topics including
“Why is our printer playing ‘happy birthday’?” or “What is that message doing on the side of that building?” He received a Doctorate in Computing on the Formalization of Protection Systems from the University of Bath, England. He also holds a Masters in Pure Mathematics and fences epee.
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