4,609 research outputs found
Lessons Learned from Positon-Electron Project Low Level RF and Longitudinal Feedback
The PEP-II B-Factory collider ended the final phase of operation at nearly twice the design current and 4X the design luminosity. To highlight the evolution from the original conceptual design through to the 1.2E34 final machine we choose one example each from the broadband feedback and from the LLRF system. They illustrate the original design estimation missed some very significant details, and how in the course of PEP-II operation unexpected difficulties led to significant insights and new approaches which allowed higher machine performance. We present valuable âlessons learnedâ which are of interest to designers of next generation feedback and impedance controlled LLRF systems
Custom Integrated Circuits
Contains reports on nine research projects.Analog Devices, Inc.International Business Machines CorporationJoint Services Electronics Program Contract DAAL03-89-C-0001U.S. Air Force - Office of Scientific Research Contract AFOSR 86-0164BDuPont CorporationNational Science Foundation Grant MIP 88-14612U.S. Navy - Office of Naval Research Contract N00014-87-K-0825American Telephone and TelegraphDigital Equipment CorporationNational Science Foundation Grant MIP 88-5876
European White Book on Real-Time Power Hardware in the Loop Testing : DERlab Report No. R- 005.0
The European White Book on Real-Time-Powerhardware-in-the-Loop testing is intended to serve as a reference document on the future of testing of electrical power equipment, with speciïŹ c focus on the emerging hardware-in-the-loop activities and application thereof within testing facilities and procedures. It will provide an outlook of how this powerful tool can be utilised to support the development, testing and validation of speciïŹ cally DER equipment. It aims to report on international experience gained thus far and provides case studies on developments and speciïŹ c technical issues, such as the hardware/software interface. This white book compliments the already existing series of DERlab European white books, covering topics such as grid-inverters and grid-connected storag
VeriSFQ - A Semi-formal Verification Framework and Benchmark for Single Flux Quantum Technology
In this paper, we propose a semi-formal verification framework for
single-flux quantum (SFQ) circuits called VeriSFQ, using the Universal
Verification Methodology (UVM) standard. The considered SFQ technology is
superconducting digital electronic devices that operate at cryogenic
temperatures with active circuit elements called the Josephson junction, which
operate at high switching speeds and low switching energy - allowing SFQ
circuits to operate at frequencies over 300 gigahertz. Due to key differences
between SFQ and CMOS logic, verification techniques for the former are not as
advanced as the latter. Thus, it is crucial to develop efficient verification
techniques as the complexity of SFQ circuits scales. The VeriSFQ framework
focuses on verifying the key circuit and gate-level properties of SFQ logic:
fanout, gate-level pipeline, path balancing, and input-to-output latency. The
combinational circuits considered in analyzing the performance of VeriSFQ are:
Kogge-Stone adders (KSA), array multipliers, integer dividers, and select
ISCAS'85 combinational benchmark circuits. Methods of introducing bugs into SFQ
circuit designs for verification detection were experimented with - including
stuck-at faults, fanout errors, unbalanced paths, and functional bugs like
incorrect logic gates. In addition, we propose an SFQ verification benchmark
consisting of combinational SFQ circuits that exemplify SFQ logic properties
and present the performance of the VeriSFQ framework on these benchmark
circuits. The portability and reusability of the UVM standard allows the
VeriSFQ framework to serve as a foundation for future SFQ semi-formal
verification techniques.Comment: 7 pages, 6 figures, 4 tables; submitted, accepted, and presented at
ISQED 2019 (20th International Symposium on Quality Electronic Design) on
March 7th, 2019 in Santa Clara, CA, US
Dragon-kings: mechanisms, statistical methods and empirical evidence
This introductory article presents the special Discussion and Debate volume
"From black swans to dragon-kings, is there life beyond power laws?" published
in Eur. Phys. J. Special Topics in May 2012. We summarize and put in
perspective the contributions into three main themes: (i) mechanisms for
dragon-kings, (ii) detection of dragon-kings and statistical tests and (iii)
empirical evidence in a large variety of natural and social systems. Overall,
we are pleased to witness significant advances both in the introduction and
clarification of underlying mechanisms and in the development of novel
efficient tests that demonstrate clear evidence for the presence of
dragon-kings in many systems. However, this positive view should be balanced by
the fact that this remains a very delicate and difficult field, if only due to
the scarcity of data as well as the extraordinary important implications with
respect to hazard assessment, risk control and predictability.Comment: 20 page
Custom Integrated Circuits
Contains reports on twelve research projects.Analog Devices, Inc.International Business Machines, Inc.Joint Services Electronics Program (Contract DAAL03-86-K-0002)Joint Services Electronics Program (Contract DAAL03-89-C-0001)U.S. Air Force - Office of Scientific Research (Grant AFOSR 86-0164)Rockwell International CorporationOKI Semiconductor, Inc.U.S. Navy - Office of Naval Research (Contract N00014-81-K-0742)Charles Stark Draper LaboratoryNational Science Foundation (Grant MIP 84-07285)National Science Foundation (Grant MIP 87-14969)Battelle LaboratoriesNational Science Foundation (Grant MIP 88-14612)DuPont CorporationDefense Advanced Research Projects Agency/U.S. Navy - Office of Naval Research (Contract N00014-87-K-0825)American Telephone and TelegraphDigital Equipment CorporationNational Science Foundation (Grant MIP-88-58764
Evaluation of assembly simulators used in closed loop attitude control system testing
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1997.Includes bibliographical references (p. 73-74).by Jason Christopher Bunn.M.S
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