2006 Second IEEE International Conference on e-Science and Grid Computing (e-Science'06), 2006
In this paper we present the design and implementation of the mission-oriented USLHCNet for HEP r... more In this paper we present the design and implementation of the mission-oriented USLHCNet for HEP research community and the UltraLight network testbed. The design philosophy for these networks is to help meet the data-intensive computing challenges of the next generation of particle physics experiments with a comprehensive, network-focused approach. Instead of treating the network as a static, unchanging and unmanaged set of intercomputer links, we are developing and using it as a dynamic, configurable, and closely monitored resource that is managed from end-to-end. In this paper we will present our work in the various areas of the project including infrastructure construction, protocol research and application development. Our goal is to construct a next-generation global system that is able to meet the data processing, distribution, access and analysis needs of the particle physics community.
This paper presents a case study of the 10-Gigabit Ethernet (10GbE) adapter from Intel R . Specif... more This paper presents a case study of the 10-Gigabit Ethernet (10GbE) adapter from Intel R . Specifically, with appropriate optimizations to the configurations of the 10GbE adapter and TCP, we demonstrate that the 10GbE adapter can perform well in local-area, storage-area, system-area, and wide-area networks. For local-area, storage-area, and system-area networks in support of networks of workstations, network-attached storage, and clusters, respectively, we can achieve over 7-Gb/s end-to-end throughput and 12-µs end-to-end latency between applications running on Linux-based PCs. For the wide-area network in support of grids, we broke the recently-set Inter-net2 Land Speed Record by 2.5 times by sustaining an endto-end TCP/IP throughput of 2.38 Gb/s between Sunnyvale, California and Geneva, Switzerland (i.e.,037 kilometers) to move over a terabyte of data in less than an hour. Thus, the above results indicate that 10GbE may be a cost-effective solution across a multitude of computing environments.
A search for a Higgs boson produced in e + e -collisions in association with a Z boson and decayi... more A search for a Higgs boson produced in e + e -collisions in association with a Z boson and decaying into invisible particles is performed. Data collected at LEP with the L3 detector at centre-of-mass energies from 189 GeV to 209 GeV are used, corresponding to an integrated luminosity of 0.63 fb -1 . Events with hadrons, electrons or muons with visible masses compatible with a Z boson and missing energy and momentum are selected. They are consistent with the Standard Model expectations. A lower limit of 112.3 GeV is set at 95% confidence level on the mass of the invisibly-decaying Higgs boson in the hypothesis that its production cross section equals that of the Standard Model Higgs boson. Relaxing this hypothesis, upper limits on the production cross section are derived.
A study is presented of the mass and spin-parity of the new boson recently observed at the LHC at... more A study is presented of the mass and spin-parity of the new boson recently observed at the LHC at a mass near 125 GeV. An integrated luminosity of 17:3 fb À1 , collected by the CMS experiment in protonproton collisions at center-of-mass energies of 7 and 8 TeV, is used. The measured mass in the ZZ channel, where both Z bosons decay to e or pairs, is 126:2 AE 0:6ðstatÞ AE 0:2ðsystÞ GeV. The angular distributions of the lepton pairs in this channel are sensitive to the spin-parity of the boson. Under the assumption of spin 0, the present data are consistent with the pure scalar hypothesis, while disfavoring the pure pseudoscalar hypothesis.
Measurements of inclusive production of the Λ, Ξ -and Ξ * (1530) baryons in two-photon collisions... more Measurements of inclusive production of the Λ, Ξ -and Ξ * (1530) baryons in two-photon collisions with the L3 detector at LEP are presented. The inclusive differential cross sections for Λ and Ξ -are measured as a function of the baryon transverse momentum, p t , and pseudo-rapidity, η. The mean number of Λ, Ξ -and Ξ * (1530) baryons per hadronic two-photon event is determined in the kinematic range 0.4 GeV < p t < 2.5 GeV, |η| < 1.2. Overall agreement with the theoretical models and Monte Carlo predictions is observed. A search for inclusive production of the pentaquark θ + (1540) in two-photon collisions through the decay θ + → pK 0 S is also presented. No evidence for production of this state is found.
The amplitude of the signal collected from the PbWO 4 crystals of the CMS electromagnetic calorim... more The amplitude of the signal collected from the PbWO 4 crystals of the CMS electromagnetic calorimeter is reconstructed by a digital filtering technique. The amplitude reconstruction has been studied with test beam data recorded from a fully equipped barrel supermodule. Issues specific to data taken in the test beam are investigated, and the implementation of the method for CMS data taking is discussed.
A search is made for charged Higgs bosons predicted by Two-Higgs-Doublet extensions of the Standa... more A search is made for charged Higgs bosons predicted by Two-Higgs-Doublet extensions of the Standard Model (2HDM) using electron-positron collision data collected by the OPAL experiment at √ s = 189-209 GeV, corresponding to an integrated luminosity of approximately 600 pb -1 . Charged Higgs bosons are assumed to be pairproduced and to decay into qq, τ ν τ or AW ± * . No signal is observed. Model-independent limits on the charged Higgsboson production cross section are derived by combining these results with previous searches at lower energies. Under the assumption BR(H ± → τ ν τ ) + BR(H ± → qq) = 1, motivated by general 2HDM type II models, excluded areas on the [m H ± , BR(H ± → τ ν τ )] plane are presented and charged Higgs bosons are excluded up to a mass of 76.
The MonALISA (Monitoring Agents in a Large Integrated Services Architecture) framework provides a... more The MonALISA (Monitoring Agents in a Large Integrated Services Architecture) framework provides a set of distributed services for monitoring, control, management and global optimization for large scale distributed systems. It is based on an ensemble of autonomous, multi-threaded, agent-based subsystems which are registered as dynamic services. They can be automatically discovered and used by other services or clients. The distributed agents can collaborate and cooperate in performing a wide range of management, control and global optimization tasks using real time monitoring information.
The Ten Hottest Topics in Parallel and Distributed Computing for the Next Millennium
What will be the fundamental issues and ideas that will define parallel and distributed computing... more What will be the fundamental issues and ideas that will define parallel and distributed computing during the next millennium? In this panel, a group of distinguished researchers will make the case for their candidates. You decide whether you agree, or stand up and make the case for the ideas that you think are important! The panelists include noted and opinionated experts in parallel computing, distributed-computing, and applications, so the discussion is guaranteed to be lively and informative.
2006 3rd International Conference on Broadband Communications, Networks and Systems, 2006
Lambda Station is an ongoing project of Fermi National Accelerator Laboratory and the California ... more Lambda Station is an ongoing project of Fermi National Accelerator Laboratory and the California Institute of Technology. The goal of this project is to design, develop and deploy network services for path selection, admission control and flow based forwarding of traffic among dataintensive Grid applications such as are used in High Energy Physics and other communities. Lambda Station deals with the last-mile problem in local area networks, connecting production clusters through a rich array of wide area networks. Selective forwarding of traffic is controlled dynamically at the demand of applications. This paper introduces the motivation of this project, design principles and current status. Integration of Lambda Station client API with the essential Grid middleware such as the dCache/SRM Storage Resource Manager is also described. Finally, the results of applying Lambda Station services to development and production clusters at Fermilab and Caltech over advanced networks such as DOE's UltraScience Net and NSF's UltraLight is covered.
The MonALISA (Monitoring Agents in A Large Integrated Services Architecture) system provides a di... more The MonALISA (Monitoring Agents in A Large Integrated Services Architecture) system provides a distributed monitoring service. MonALISA is based on a scalable Dynamic Distributed Services Architecture which is designed to meet the needs of physics collaborations for monitoring global Grid systems, and is implemented using JINI/JAVA and WSDL/SOAP technologies. The scalability of the system derives from the use of multithreaded Station Servers to host a variety of loosely coupled self-describing dynamic services, the ability of each service to register itself and then to be discovered and used by any other services, or clients that require such information, and the ability of all services and clients subscribing to a set of events (state changes) in the system to be notified automatically. The framework integrates several existing monitoring tools and procedures to collect parameters describing computational nodes, applications and network performance. It has built-in SNMP support and network-performance monitoring algorithms that enable it to monitor end-to-end network performance as well as the performance and state of site facilities in a Grid. MonALISA is currently running around the clock on the US CMS test Grid as well as an increasing number of other sites. It is also being used to monitor the performance and optimize the interconnections among the reflectors in the VRVS system.
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Papers by Harvey Newman