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1

ETTP Security Access Control System (ESACS) | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

ETTP Security Access Control System (ESACS) ETTP Security Access Control System (ESACS) ETTP Security Access Control System (ESACS) ETTP Security Access Control System (ESACS) More...

2

3 - How Electronic Access Control Systems Work  

Science Journals Connector (OSTI)

Publisher Summary This chapter focuses on Electronic Access Control Systems concepts and how they work. These systems comprise electronic elements, physical elements, operational elements, and logical elements to create a complete working system that facilitates rapid and reliable access to authorized users in a facility at minimum long-term cost to the organization. They are digital networks that control access to security portals. A security portal is an entry into or out of a security boundary. Most Electronic Access Control Systems also function as an intrusion alarm system. From this point forward, it assumes that the systems have an alarm system element. Electronic Access Control Systems comprise field equipment, decision modules, a communications network, one or more databases, and one or more human interface terminals. The most obvious elements of an Electronic Access Control System are the Field Elements: Access Control System Portals (for pedestrians or vehicles), alarm sensors, and any controlled devices such as roll-up doors and lights. This chapter is about Electronic Access Control Systems concepts and how they work. It is important to read this chapter very carefully and be certain that you understand everything in it. Go over the Chapter Objectives and the Chapter Summary. Everything else you read in this book is based on the material in this chapter. Electronic Access Control Systems comprise electronic elements, physical elements, operational elements, and logical elements to create a complete working system that facilitates rapid and reliable access to authorized users in a facility at minimum long-term cost to the organization. This book is written in a hierarchical fashion; that is, the concepts are related first and then expanded on in greater detail later in the book. Accordingly, you will see repetition throughout the book, but that repetition is designed to instill learning in a layered fashion. Author Information: Thomas L. Norman, CPP, PSP, CSC, Executive Vice President, Protection Partners International

Thomas Norman

2012-01-01T23:59:59.000Z

3

Performance estimates for personnel access control systems  

SciTech Connect

Current performance estimates for personnel access control systems use estimates of Type I and Type II verification errors. A system performance equation which addresses normal operation, the insider, and outside adversary attack is developed. Examination of this equation reveals the inadequacy of classical Type I and II error evaluations which require detailed knowledge of the adversary threat scenario for each specific installation. Consequently, new performance measures which are consistent with the performance equation and independent of the threat are developed as an aid in selecting personnel access control systems.

Bradley, R. G.

1980-10-01T23:59:59.000Z

4

A Framework for Flexible Access Control in Digital Library Systems  

E-Print Network (OSTI)

to merely control access to documents local to the digital library. The access control policies are often called DACM (Document Access Control Methods). The basic idea is geared toward discretionary accessA Framework for Flexible Access Control in Digital Library Systems Indrajit Ray and Sudip

Ray, Indrajit

5

XML ACCESS CONTROL SYSTEMS: A COMPONENT-BASED APPROACH  

E-Print Network (OSTI)

the characteristics of XML documents, allowing the definition of access control policies that operate with a fine to the integration of the access control system with Web based systems. #12;The analysis contained in this paperCHAPTER 4 XML ACCESS CONTROL SYSTEMS: A COMPONENT-BASED APPROACH E. Damiani1 S. De Capitani di

Samarati, Pierangela

6

ACCESS CONTROL  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

TERMS/DEFINITIONS FROM DOE M 470.4-7 TERMS/DEFINITIONS FROM DOE M 470.4-7 ACCESS CONTROL. The process of permitting access or denying access to information, facilities, nuclear materials, resources, or designated security areas. ACCESS CONTROL MEASURES. Hardware and software features, physical controls, operating procedures, administrative procedures, and various combinations of these designed to detect or prevent unauthorized access to classified information; special nuclear materials; Government property; automated information systems, facilities, or materials; or areas containing the above and to enforce use of these measures to protect Departmental security and property interests. CRITICAL PATH SCENARIO. An adversary-based scenario that is generated during the conduct of a vulnerability assessment and accounts for adversary tactics that

7

Access Rate Control System | Y-12 National Security Complex  

NLE Websites -- All DOE Office Websites (Extended Search)

by this browser. Download video Captions: On Time: 4:03 min Developed to support safeguards and security, the Access Rate Control System (ARCS) controls the speed of entry...

8

SPS access control system a new user interface  

E-Print Network (OSTI)

This document describes the project to implement at CERN new trends in industrial control systems and integrate new requirements and functions requested by users. This project will be the testing ground for the specification of procedures in the Access Control and Machine Interlock of LHC. The last modification in the Access Control System to the primary beam areas was made in 1995, and this new project is to improve the fields of personal security, access security and the introduction of modern communication networks used in the industrial control systems. Inside the cycle model of project life, it is at the present time in the test phase in terms of security and exploitation inside the Accelerator Decelerator (AD) project. The presence of Authorization Management System (AMS) to guarantee the automatic information distribution of authorizations to controlled areas is in line with this project.

Riesco, T

1999-01-01T23:59:59.000Z

9

Controlling access to pervasive information in the "Solar" system  

E-Print Network (OSTI)

Controlling access to pervasive information in the "Solar" system Kazuhiro Minami and David Kotz Dept. of Computer Science, Dartmouth College Hanover, NH, USA 03755 {minami, dfk}@cs.dartmouth.edu http://www.cs.dartmouth.edu/~solar and enforced in a decentralized, distributed system with no central administrator or central policy maker

10

The Study of Substation Automation Remote Communication for Multi-granularity Access Control System  

Science Journals Connector (OSTI)

This paper based on the demands of access control of substation automation system, analyzed two operation objects of ... can fulfill the needs of access control in substation automation.

Lichun Shi; Haimei Xiao

2012-01-01T23:59:59.000Z

11

Distributed Proving in Access-Control Systems Scott Garriss  

E-Print Network (OSTI)

]). That is, credentials (i.e., certificates) are encoded as formulas in the logic (e.g., "KAlice signed (KBobDistributed Proving in Access-Control Systems Lujo Bauer Scott Garriss Michael K. Reiter§ Abstract- dentials in a formal logic (e.g., [16]). Of particular in- terest here are those in which the evidence

Reiter, Michael

12

Fixed denial system for access control of nuclear weapons  

SciTech Connect

The Fixed Denial System (FDS) is a simple, low cost, vertical, underground silo used to store individual nuclear weapons within secured areas of present storage sites. The normal storage position of each weapon is at or near the top of the shaft, allowing rapid operational weapon access and removal. In response to a threat, the weapon within a storage canister can be dropped to the bottom of the shaft where it is automatically locked in place. Once the alert condition is resolved and control of the site reestablished, the weapon canister is unlocked with a coded signal and retrieved. This system offers a high degree of hardening and access denial that is characteristic of Vertical Underground Storage (VUGS) systems. An aboveground test apparatus was constructed to demonstrate the feasibility of using a pneumatic air cushion, which is generated by the free-fall of the weapon container, to control impact velocity and descent time. Stockpile weapons that might be stored in the FDS include the W33, W48, W79, and the W54 ADM.

Willan, V.O.; Gustafson, E.C.

1981-12-01T23:59:59.000Z

13

An access control system for multimedia content distribution  

Science Journals Connector (OSTI)

Multimedia content distribution has appeared as a new growth market offered by network providers, defining resource access infrastructures able to support both wired and wireless accesses. Although these infrastructures have been widely studied in the ...

Manuel Sánchez; Gabriel López; Óscar Cánovas; Juan A. Sánchez; Antonio F. Gómez-Skarmeta

2006-06-01T23:59:59.000Z

14

Functional requirements with survey results for integrated intrusion detection and access control annunciator systems  

SciTech Connect

This report contains the guidance Functional Requirements for an Integrated Intrusion Detection and Access Control Annunciator System, and survey results of selected commercial systems. The survey questions were based upon the functional requirements; therefore, the results reflect which and sometimes how the guidance recommendations were met.

Arakaki, L.H.; Monaco, F.M.

1995-09-01T23:59:59.000Z

15

Access control models and security labelling  

Science Journals Connector (OSTI)

Security labels convey information that is utilised to perform access control decisions, specify protective measures, and aid in the determination of additional handling restrictions required by security policies. In discussing security labelling, one ... Keywords: access control, assurance, dynamic labelling model, open system, security label, security policy

Chuchang Liu; Angela Billard; Maris Ozols; Nikifor Jeremic

2007-01-01T23:59:59.000Z

16

Maximally Accessible Purity in Coherently Controlled Open Quantum Systems: Application to Quantum State Engineering  

E-Print Network (OSTI)

A fundamental problem in quantum control is to precisely characterize the controlled system dynamics when decoherence effects are present. In this work, we derive the upper bound of achievable purity for coherently driven dissipative systems, which is rather useful for assessing control performances. The theory is further testified on a two-qubit nuclear magnetic resonance spin system. Under joint effects of coherent pulses and system relaxation, we are able to implement the tasks of open system polarization transfer and pseudopure state preparation with remarkably, both of them approaching near optimal performance in purity. Our work shows great applicative potential of utilizing rather than suppressing relaxation effects in open system control protocols.

Jun Li; Dawei Lu; Zhihuang Luo; Raymond Laflamme; Xinhua Peng; Jiangfeng Du

2014-12-11T23:59:59.000Z

17

5 - Types of Access Controlled Portals  

Science Journals Connector (OSTI)

Publisher Summary This chapter introduces information about types of Access Control System Portals. A portal is the way through which a person must pass and an Access Control System Portal is a portal controlled by access control system devices. When an access control portal is confronted, one knows that he is moving from one access area into another. Depending on the security configuration of the portal, access authorization may be required to enter, to leave, or to enter and leave through the portal. In most cases, access can be granted to a single individual, but for some higher security zones, access may require the presence of two or more authorized persons. Access portals can be configured to work on a schedule so that access is free during some hours and requires authorization during others, or may be limited to certain individuals during certain hours. Pedestrian portals include standard doors, automatic doors, revolving doors, turnstiles, Man-Traps, and automated walls. Vehicle portals may include standard barrier gates, high-security barrier gates, and sally ports. An Access Portal is a passageway through which a person must pass to go from one access zone to another. When an access control portal is confronted, you know you are moving from one access area into another. Depending on the security configuration of the portal, access authorization may be required to enter, to leave, or to enter and leave through the portal. In most cases, access can be granted to a single individual, but for some higher security zones, access may require the presence of two or more authorized people. Access portals can be configured to work on a schedule so that access is free during some hours and requires authorization during others or may be limited to certain individuals during certain hours. Pedestrian portals include common doors, automatic doors, revolving doors, turnstiles, man-traps, and automated walls. Vehicle portals may include standard barrier gates, high-security barrier gates, and sally ports. Author Information: Thomas L. Norman, CPP, PSP, CSC, Executive Vice President, Protection Partners International

Thomas Norman

2012-01-01T23:59:59.000Z

18

E-Print Network 3.0 - access control specifications Sample Search...  

NLE Websites -- All DOE Office Websites (Extended Search)

Hiltunen and Richard D. Schlichting Summary: specification of an access control system. Software -- Practice and Expe- rience, 17(9):575--593, Sep 1987. 28... Access Control in...

19

Information Access Router for Integrated Information Access System Koji Murakami  

E-Print Network (OSTI)

Information Access Router for Integrated Information Access System Koji Murakami Department System (IIAS) that accepts diverse kinds of questions and provides the requested information in the most suit- able format for the information need. We designed a set of 18 Information Access Types

20

Automatic Error Finding in Access-Control Policies  

E-Print Network (OSTI)

Access-control policies are a key infrastructural technology for computer security. However, a significant problem is that system administrators need to be able to automatically verify whether their policies capture the ...

Jayaraman, Karthick

2010-05-05T23:59:59.000Z

Note: This page contains sample records for the topic "access control system" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


21

Accessible Energy in Quantum Systems  

Science Journals Connector (OSTI)

A quantum system in a mixed state can transfer only part of its energy to a quantum system in a pure state if we require that the final state of the second system is once again pure. We calculate this accessible energy by constructing the optimum unitary operator that connects the initial state of the combined system with its final state. We show that for large systems such as commonly considered in thermodynamics a simple entropy argument suffices but that this method of calculation may yield results that are too large for simpler systems owing to the constraint that the time development operator must be unitary.

Adriaan Walther

1971-01-01T23:59:59.000Z

22

Nemesis: Preventing Authentication & Access Control Vulnerabilities in Web Applications  

E-Print Network (OSTI)

Nemesis: Preventing Authentication & Access Control Vulnerabilities in Web Applications Michael web applications. Authentication attacks occur when a web application authenticates users unsafely, granting access to web clients that lack the ap- propriate credentials. Access control attacks occur when

Sabatini, David M.

23

A comparative study of specification models for autonomic access control of digital rights  

Science Journals Connector (OSTI)

One of the goals of Digital Rights Management Systems is the provision of a flexible access rights management system to specify and enforce digital rights. Policy-based access control is an important feature of flexible access management systems as it ...

K. Bhoopalam; K. Maly; R. Mukkamala; M. Zubair; D. Agrawal; D. Kaminsky

2005-10-01T23:59:59.000Z

24

Supporting accessibility in higher education information systems  

Science Journals Connector (OSTI)

Higher education institutions (HEI) and students are highly dependent of information systems, implemented as web applications. Students must be able to access this applications, thought accessible web interfaces, in order to perform their academic activities. ... Keywords: DSpace, W3C, accessibility, higher education institutions, moodle

Arsénio Reis; João Barroso; Ramiro Gonçalves

2013-07-01T23:59:59.000Z

25

E-Print Network 3.0 - access system analysis Sample Search Results  

NLE Websites -- All DOE Office Websites (Extended Search)

areas are all... and the Access Control System (biometric system). Proceedings of HIAT09, Venice, Italy G-01 Applications... : Interconnection between the systems. STATUS There are...

26

TRBAC: A temporal role-based access control model  

Science Journals Connector (OSTI)

Role-based access control (RBAC) models are receiving increasing attention as a generalized approach to access control. Roles may be available to users at certain time periods, and unavailable at others. Moreover, there can be temporal dependencies among ... Keywords: Role triggers, role-based access control, temporal constraints

Elisa Bertino; Piero Andrea Bonatti; Elena Ferrari

2001-08-01T23:59:59.000Z

27

Pipelined Memory Controllers for DSP Applications Handling Unpredictable Data Accesses  

E-Print Network (OSTI)

Pipelined Memory Controllers for DSP Applications Handling Unpredictable Data Accesses Bertrand Le pipelined memory access controllers can be generated improving the pipeline access mode to RAM. We focus as unpredictable ones (dynamic address computations) in a pipeline way. 1 Introduction Actual researches

Paris-Sud XI, Université de

28

A New Grid Security Framework with Dynamic Access Control  

Science Journals Connector (OSTI)

In this paper, a new Grid security framework based on dynamic access control is introduced to address some security problem in Grid. Based on the dynamic evaluating results about ... levels to access rights. In o...

Bing Xie; Xiaolin Gui; Yinan Li; Depei Qian

2004-01-01T23:59:59.000Z

29

V-120: EMC Smarts Network Configuration Manager Java RMI Access Control  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

0: EMC Smarts Network Configuration Manager Java RMI Access 0: EMC Smarts Network Configuration Manager Java RMI Access Control Flaw Lets Remote Users Gain Full Control V-120: EMC Smarts Network Configuration Manager Java RMI Access Control Flaw Lets Remote Users Gain Full Control March 27, 2013 - 12:51am Addthis PROBLEM: EMC Smarts Network Configuration Manager Java RMI Access Control Flaw Lets Remote Users Gain Full Control PLATFORM: Version(s): prior to 9.2 ABSTRACT: Two vulnerabilities were reported in EMC Smarts Network Configuration Manager. REFERENCE LINKS: SecurityTracker Alert ID: 1028342 www.emc.com CVE-2013-0935 IMPACT ASSESSMENT: Medium DISCUSSION: A remote user can access some Java Remote Method Invocation methods without authenticating to gain control of the target system. A user can exploit unspecified flaws in the NCM System Management

30

V-120: EMC Smarts Network Configuration Manager Java RMI Access Control  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

0: EMC Smarts Network Configuration Manager Java RMI Access 0: EMC Smarts Network Configuration Manager Java RMI Access Control Flaw Lets Remote Users Gain Full Control V-120: EMC Smarts Network Configuration Manager Java RMI Access Control Flaw Lets Remote Users Gain Full Control March 27, 2013 - 12:51am Addthis PROBLEM: EMC Smarts Network Configuration Manager Java RMI Access Control Flaw Lets Remote Users Gain Full Control PLATFORM: Version(s): prior to 9.2 ABSTRACT: Two vulnerabilities were reported in EMC Smarts Network Configuration Manager. REFERENCE LINKS: SecurityTracker Alert ID: 1028342 www.emc.com CVE-2013-0935 IMPACT ASSESSMENT: Medium DISCUSSION: A remote user can access some Java Remote Method Invocation methods without authenticating to gain control of the target system. A user can exploit unspecified flaws in the NCM System Management

31

Universally composable adaptive oblivious transfer (with access control) from standard assumptions  

Science Journals Connector (OSTI)

In this paper, we provide the first scheme that realises an attribute-based access control system for static resources that offers maximal privacy and is secure in the universal composability framework (UC). More precisely, we offer a protocol for adaptive ... Keywords: anonymous credentials, attribute-based access control, oblivious transfer, privacy

Masayuki Abe; Jan Camenisch; Maria Dubovitskaya; Ryo Nishimaki

2013-11-01T23:59:59.000Z

32

Beyond 'Yes or No' Extending Access Control in Groupware with Awareness and Negotiation  

E-Print Network (OSTI)

notification and negotiation service, which is tightly integrated with a classical access control systemBeyond 'Yes or No' ­ Extending Access Control in Groupware with Awareness and Negotiation Oliver to documents in three real world fields of application, which have in common that they are very difficult

33

National Geothermal Data Systems Data Acquisition and Access...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

National Geothermal Data Systems Data Acquisition and Access National Geothermal Data Systems Data Acquisition and Access Project objective: To support the acquisition of new and...

34

U-225: Citrix Access Gateway Plug-in for Windows nsepacom ActiveX Control  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

5: Citrix Access Gateway Plug-in for Windows nsepacom ActiveX 5: Citrix Access Gateway Plug-in for Windows nsepacom ActiveX Control Vulnerabilities U-225: Citrix Access Gateway Plug-in for Windows nsepacom ActiveX Control Vulnerabilities August 1, 2012 - 5:37am Addthis PROBLEM: Citrix Access Gateway Plug-in for Windows nsepacom ActiveX Control Vulnerabilities PLATFORM: Citrix Access Gateway 9.x ABSTRACT: Two vulnerabilities in Citrix Access Gateway Plug-in for Windows can be exploited by malicious people to compromise a user's system. reference LINKS: Citrix Knowledge Center Secunia Advisory SA45299 Secunia Research Secunia Research CVE-2011-2592 CVE-2011-2593 IMPACT ASSESSMENT: High Discussion: Research has discovered two vulnerabilities in Citrix Access Gateway Plug-in for Windows, which can be exploited by malicious people to

35

Efficient IRM enforcement of history-based access control policies  

Science Journals Connector (OSTI)

Inlined Reference Monitor (IRM) is an established enforcement mechanism for history-based access control policies. IRM enforcement injects monitoring code into the binary of an untrusted program in order to track its execution history. The injected code ... Keywords: distributed optimization protocol, history-based access control policies, inlined reference monitors, language-based security, security automata

Fei Yan; Philip W. L. Fong

2009-03-01T23:59:59.000Z

36

Hybrid Access Control Mechanism in Two-Tier Femtocell Networks  

E-Print Network (OSTI)

. . . . . . . . . . . . . . . . . . . . 5 B. Interference Management in Femtocell Networks . . . . . . 9 C. Access Control in Femtocell Networks . . . . . . . . . . . . . 11 D. Thesis Contribution . . . . . . . . . . . . . . . . . . . . . . 15 E. Organization of Thesis... . . . . . . . . . . . . . . . . . . . . 16 II STANDARD ITERATIVE POWER CONTROL ALGORITHMS 17 A. Distributed Power Control with Fixed SINR . . . . . . . . 20 B. Standard Interference Function . . . . . . . . . . . . . . . 23 C. Iterative Power Control in a Two-Tier Femtocell Network . 30...

Mantravadi, Sirisha 1987-

2012-08-21T23:59:59.000Z

37

U-155: WebCalendar Access Control and File Inclusion Bugs Let Remote Users  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

5: WebCalendar Access Control and File Inclusion Bugs Let 5: WebCalendar Access Control and File Inclusion Bugs Let Remote Users Potentially Execute Arbitrary Code U-155: WebCalendar Access Control and File Inclusion Bugs Let Remote Users Potentially Execute Arbitrary Code April 25, 2012 - 7:00am Addthis PROBLEM: WebCalendar Access Control and File Inclusion Bugs Let Remote Users Potentially Execute Arbitrary Code PLATFORM: 1.2.4 and prior versions ABSTRACT: Two vulnerabilities were reported in WebCalendar. A remote user may be able to execute arbitrary PHP code on the target system. reference links: SecurityTracker Alert ID: 1026966 CVE-2012-1495 CVE-2012-1496 IMPACT ASSESSMENT: Medium Discussion: A remote user can access '/install/index.php' to potentially modify '/includes/settings/' with arbitrary values or PHP code. A remote

38

Multiplayer Quantum Games and its Application as Access Controller in Architecture of Quantum Computers  

E-Print Network (OSTI)

One of the basics tasks in computer systems is the control of access of resources. Basically, there is a finite amount of resources that can be, for example, the CPU, memory or I/O ports, and several processes requiring those resources. If there is not enough resource in order to attend the demand, some kind of control access has to be employed. In this work, recognizing the resource sharing problem as a competition, we employ a simplified multiplayer quantum game as an access controller. The proposed quantum game can be employed in the architecture of quantum computers.

Paulo Benicio; Melo de Sousa; Rubens Viana Ramos

2008-02-26T23:59:59.000Z

39

Generalized Access Control of Synchronous Communication  

E-Print Network (OSTI)

and popular mode of communi- cation. Among the novel characteristics of this control are: the regulation, and can no longer protect themselves by hiding within their local intranet, behind their firewalls. Rather

Minsky, Naftaly

40

Distributed Medium Access Control for Next Generation CDMA Wireless Networks  

E-Print Network (OSTI)

Distributed Medium Access Control for Next Generation CDMA Wireless Networks Hai Jiang, Princeton wireless networks are expected to have a simple infrastructure with distributed control. In this article, we consider a generic distributed network model for future wireless multi- media communications

Zhuang, Weihua

Note: This page contains sample records for the topic "access control system" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


41

U-211: EMC Celerra/VNX/VNXe Access Control Bug Lets Remote Authenticated  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

11: EMC Celerra/VNX/VNXe Access Control Bug Lets Remote 11: EMC Celerra/VNX/VNXe Access Control Bug Lets Remote Authenticated Users Access Files/Directories U-211: EMC Celerra/VNX/VNXe Access Control Bug Lets Remote Authenticated Users Access Files/Directories July 12, 2012 - 7:00am Addthis PROBLEM: EMC Celerra/VNX/VNXe Access Control Bug Lets Remote Authenticated Users Access Files/Directories PLATFORM: EMC Celerra Network Server versions 6.0.36.4 through 6.0.60.2 EMC VNX versions 7.0.12.0 through 7.0.53.1 EMC VNXe 2.0 (including SP1, SP2, and SP3) EMC VNXe MR1 (including SP1, SP2, SP3, and SP3.1) EMC VNXe MR2 (including SP0.1) ABSTRACT: A vulnerability was reported in EMC Celerra/VNX/VNXe. A remote authenticated user can access files and directories on the target file system. reference LINKS: The Vendor's Advisory

42

Privacy-preserving attribute-based access control for grid computing  

Science Journals Connector (OSTI)

In Attribute-Based Access Control (ABAC), access is granted based on the attributes of the requesting user. ABAC is a highly flexible and scalable access control scheme which can deal with diverse security requirements in a grid computing environment. However, in ABAC the user attributes published by the identity providers for authorisation decision may cause some privacy violation. We developed an attribute release control mechanism to publish an optimal set of user attributes that are essential to access a desired resource (or service), while exposing the least amount of sensitive user information. To facilitate the selection of an optimal set of user attributes, we also developed a Web service, named Security Policy Publication Service (SPPS), which retrieves the access condition from the access control policies in eXtensible Access Control Markup Language (XACML) and converts it into a Disjunctive Normal Form (DNF) of user attributes. For the implementation of our privacy-preserving ABAC, we used the Globus Toolkit and modified the Shibboleth Identity Provider and GridShib. Our performance analysis shows that the overhead of the proposed system is very small.

Sang M. Park; Soon M. Chung

2014-01-01T23:59:59.000Z

43

Thermal Control & System Integration  

Energy.gov (U.S. Department of Energy (DOE))

The thermal control and system integration activity focuses on issues such as the integration of motor and power control technologies and the development of advanced thermal control technologies....

44

PIA - Foreign Access Central Tracking System (FACTS) | Department...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

PIA - Foreign Access Central Tracking System (FACTS) More Documents & Publications PIA - INL SECURITY INFORMATION MANAGEMENT SYSTEM BUSINESS ENCLAVE PIA - INL PeopleSoft - Human...

45

E-Print Network 3.0 - access control scheme Sample Search Results  

NLE Websites -- All DOE Office Websites (Extended Search)

Access Scheduling Schemes Zhibin Fang Xian-He Sun Yong Chen Surendra Byna... access scheduling is performed by a shared memory controller that is integrated onto the same...

46

Control system design method  

DOE Patents (OSTI)

A control system design method and concomitant control system comprising representing a physical apparatus to be controlled as a Hamiltonian system, determining elements of the Hamiltonian system representation which are power generators, power dissipators, and power storage devices, analyzing stability and performance of the Hamiltonian system based on the results of the determining step and determining necessary and sufficient conditions for stability of the Hamiltonian system, creating a stable control system based on the results of the analyzing step, and employing the resulting control system to control the physical apparatus.

Wilson, David G. (Tijeras, NM); Robinett, III, Rush D. (Tijeras, NM)

2012-02-21T23:59:59.000Z

47

Performance Modeling and Access Methods for Temporal Database Management Systems  

E-Print Network (OSTI)

implementation issues. Database systems with temporal support maintain history data on line together with current. Performance Modeling and Access Methods for Temporal Database Management Systems TR86-018 August. #12;Performance Modeling and Access Methods for Temporal Database Management Systems by Ilsoo Ahn

North Carolina at Chapel Hill, University of

48

Efficient integration of fine-grained access control and resource brokering in grid  

Science Journals Connector (OSTI)

In this paper, we present a novel resource brokering service for grid systems which considers authorization policies of the grid nodes in the process of selecting the resources to be assigned to a request. We argue such an integration is needed to avoid ... Keywords: Access control, Computational grid network, Grid security, Policy organization, Resource brokering, XACML

P. Mazzoleni; B. Crispo; S. Sivasubramanian; E. Bertino

2009-07-01T23:59:59.000Z

49

TrustForge: Flexible Access Control for Collaborative Crowd-Sourced Environment  

E-Print Network (OSTI)

of the credentialing and access control process in the context of component-based systems, where users contribute for users based on the quality of their past component contributions are used to tune the static policies-07-1-0907. The views expressed are those of the TrustForge team and do not reflect the official policy or position

Plotkin, Joshua B.

50

Secure Safety: Secure Remote Access to Critical Safety Systems in Offshore Installations  

Science Journals Connector (OSTI)

Safety Instrumented Systems (SIS) as defined in IEC 61508 and IEC 61511 are very important for the safety of offshore oil & natural gas installations. SIS typically include the Emergency Shutdown System (ESD) that ensures that process systems return ... Keywords: Offshore, Process Control, Safety Instrumented Systems, Secure remote access

Martin Gilje Jaatun; Tor Olav Grøtan; Maria B. Line

2008-06-01T23:59:59.000Z

51

Caf Systems Central Security Access Form  

E-Print Network (OSTI)

and Procurement Tracking Reports (Encumbrances, Delivery, Change Order History) SCH_SUPPLY_CHAIN Ad Hoc Query Runner Ability to run reports created by Ad Hoc Query Authors CAFE_NU_COGNOS_AD_HOC_VIEWERS Ad Hoc Query Author (Training Required) Access to Query Studio to create, build, and save reports CAFE_NU_COGNOS_AD_HOC

Shull, Kenneth R.

52

The evolution of the ISOLDE control system  

E-Print Network (OSTI)

The ISOLDE on-line mass separator facility is operating on a Personal Computer based control system since spring 1992. Front End Computers accessing the hardware are controlled from consoles running Microsoft WindowsTM through a Novell NetWare4TM local area network. The control system is transparently integrated in the CERN wide office network and makes heavy use of the CERN standard office application programs to control and to document the running of the ISOLDE isotope separators. This paper recalls the architecture of the control system, shows its recent developments and gives some examples of its graphical user interface.

Jonsson, O C; Deloose, I; Drumm, P V; Evensen, A H M; Gase, K; Focker, G J; Fowler, A B; Kugler, E; Lettry, Jacques; Olesen, G; Ravn, H L

1997-01-01T23:59:59.000Z

53

Virtual Control System Environment  

NLE Websites -- All DOE Office Websites (Extended Search)

Control System Environment Sandia National Laboratories is a multi-program laboratory managed and operated by Sandia Corporation, a wholly owned subsidiary of Lockheed Martin...

54

THE PUSH TOWARD GRID REGIONALIZATION IN OPEN ACCESS TRANSMISSION SYSTEMS  

E-Print Network (OSTI)

THE PUSH TOWARD GRID REGIONALIZATION IN OPEN ACCESS TRANSMISSION SYSTEMS ProfessorGeorge Gross Universityof Illinois atUrbana-Champaign USA E-mail:gross@uiuc.edu ExtendedSummary Keywords:RTO, ISO

Gross, George

55

MANAGEMENT CONTROL SYSTEM IN PUBLIC  

E-Print Network (OSTI)

1 MANAGEMENT CONTROL SYSTEM IN PUBLIC ADMINISTRATION: BEYOND RATIONAL MYTHS Nicolas Berland of practices around their management control systems. Despite some apparent failures, the implemented systems organizations have developed management control systems. Historically, these systems have been invented

Paris-Sud XI, Université de

56

Access Business Systems | Argonne National Laboratory  

NLE Websites -- All DOE Office Websites (Extended Search)

(desktop, laptop, mobile) Using any operating system (such as Windows, Mac, Linux, Apple IOS, Android) Through most browsers (Internet Explorer, Firefox, Safari; Chrome is not...

57

E-Print Network 3.0 - access control mac Sample Search Results  

NLE Websites -- All DOE Office Websites (Extended Search)

Networks Summary: .11, Wireless LAN Medium Access Control (MAC) and Physical Layer (PHY) Specifications," LAN MAN Standards Com... , New York Email: ray, demirkol,...

58

Web Service Access Management for Integration with Agent Systems  

E-Print Network (OSTI)

Web Service Access Management for Integration with Agent Systems B.J. Overeinder, P.D. Verkaik, from the perspective of agent systems (and not as is gen- erally the case by web service providers). Mediating between web service requests from (virtual) organizations of agents, the web ser- vice gateway

59

Fuel control system  

SciTech Connect

A fuel control system is described comprising: a fuel rack movable in opposite fuel-increasing and fuel-decreasing directions; a rack control member movable in opposite fuel-increasing and fuel-decreasing directions; servo system means for moving the fuel rack in response to movement of the rack control member an electrically energizable member movable in opposite fuel-increasing and fuel-decreasing directions, the electrically energizable member being urged to move in its fuel-decreasing direction when energized; first coupling means for connecting the electrically energizable member to the rack control member to move the rack control member in its fuel-decreasing direction in response to movement of the electrically energizable member in its fuel-decreasing direction; a mechanical governor control having a member movable in opposite fuel-increasing and fuel-decreasing directions; second coupling means for connecting the mechanical governor to the rack control member to move the rack control member in its fuel-decreasing direction in response to movement of the mechanical governor member in its fuel-decreasing direction; bias means for biasing the rack control member to move in its fuel-increasing direction.

Staniak, W.A.; Samuelson, R.E.; Moncelle, M.E.

1986-10-14T23:59:59.000Z

60

Burner control system  

SciTech Connect

A burner control apparatus for use with a furnace installation that has an operating control to produce a request for burner operation, a flame sensor to produce a signal when flame is present in the monitored combustion chamber, and one or more devices for control of ignition and/or fuel flow. The burner control apparatus comprises lockout apparatus for de-energizing the control apparatus, a control device for actuating the ignition and/or fuel control devices, and a timing circuit that provides four successive and partially overlapping timing intervals of precise relation, including a purge timing interval, a pilot ignition interval, and a main fuel ignition interval. The present invention further includes a burner control system which verifies the proper operation of certain sensors in a burner or furnace including particularly the air flow sensor. Additionally, the present system also prevents an attempt to ignite a burner if a condition is detected which indicates that the air flow sensor has been bypassed or wedged in the actuated position.

Cade, P.J.

1981-01-06T23:59:59.000Z

Note: This page contains sample records for the topic "access control system" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


61

Corrective Actin Tracking System CATS User's Guide for Direct Web Access, Version 4.0  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

CATS CATS Corrective Action Tracking System The United States Department of Energy Office of Environment, Safety and Health EH-33-2004-09-0001.Ver.4.0 09/07/2004 Corrective Action Tracking System (CATS) User's Guide for Direct Web Access Document Number EH-33-2004-09-0001.Ver.4.0 The United States Department of Energy Office of Environment, Safety and Health Prepared by Highland Technology Services, Inc. September 2004 CATS User Guide i Document # EH-33-2004-09-0001.Ver.4.0 Table of Contents 1.0 Overview ....................................................................................................................................3 1.1 CATS Database Access Control Overview ........................................................................

62

HACK: A Health-based Access Control Mechanism for Dynamic Enterprise Environments  

E-Print Network (OSTI)

HACK: A Health-based Access Control Mechanism for Dynamic Enterprise Environments Chenjia Wang - the software itself. In this paper, we propose HACK, a health-based, adaptive access control scheme be determined when the user attempts to create a new process executing that software. HACK checks its own

Shi, Weisong

63

Securing Control Systems Modems  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Recommended Practice for Securing Recommended Practice for Securing Control System Modems January 2008 iii ABSTRACT This paper addresses an often overlooked "backdoor" into critical infrastructure control systems created by modem connections. A modem's connection to the public telephone system is similar to a corporate network connection to the Internet. By tracing typical attack paths into the system, this paper provides the reader with an analysis of the problem and then guides the reader through methods to evaluate existing modem security. Following the analysis, a series of methods for securing modems is provided. These methods are correlated to well-known networking security methods. iv ACKNOWLEDGEMENT This document was developed for the U.S. Department of Homeland

64

Compressed Air System Control Strategies  

Energy.gov (U.S. Department of Energy (DOE))

This tip sheet briefly discusses compressed air system control strategies as a means to improving and maintaining system performance.

65

CONTROLLING ACCESS TO UNIVERSITY FACILITIES 1. It is the Policy of Syracuse University that all electronically secured University buildings will  

E-Print Network (OSTI)

that all electronically secured University buildings will have a single access control system for managing for any building will be at the discretion of the Cabinet Officer assigned responsibility for the building or area of a building. Approval will be coordinated through the Department of Public Safety (DPS

Mather, Patrick T.

66

The under-machine inspection system consists of a remotely controlled robot. This device is capable of accessing hard-to-reach areas and deal with poor lighting conditions, thus decreasing the risk of injury for the inspection  

E-Print Network (OSTI)

. The system also contains shock absorbers in its wheels to deal with rough surfaces. The clamps used here special types of wheel to reduce vibrations during motion. Furthermore, ball wheels are used in this robot#12;The under-machine inspection system consists of a remotely controlled robot. This device

Koschan, Andreas

67

Heliostat control system strategies  

SciTech Connect

The purpose of this study is to identify, evaluate, and recommend potential alternatives to methods currently employed in the control of and communication with a heliostat array in a solar thermal power plant. The principle goal of this study is to demonstrate the feasibility of reducing significantly the current projected costs for heliostat array communication, control and actuator subsystems. A number of alternatives to the present technique of using dedicated data transmission cables for communication between a central computer and heliostat computer are described in the paper. It appears that by converting to a radio frequency communication system or a carrier-current system that a number of problems (including cost) associated with dedicated data transmission cable can be avoided. To relieve the computing load of the central computer it is suggested that the heliostat microcomputer be given more direct responsibility for sun vector calculations and error compensation routines for each individual heliostat. By using the radio frequency or carriercurrent communication scheme, and increasing each heliostat computer's computing load, there will be a significant reduction of cost for control of the heliostat field for third generation solar thermal power plants. The results of this study indicate that the combined communication, control, and actuator subsystem costs can potentially be reduced to less than $500/heliostat (approximately $9/m/sup 2/); this is a significant reduction compared with the current projected corresponding composite costs of $1343/heliostat (approximately $25/m/sup 2/) for the second generation concept.

Pearson, J.; Chen, B.

1983-11-01T23:59:59.000Z

68

Turbocharger control system  

SciTech Connect

A turbocharger control system is described for an engine having a turbocharger with a variable output compressor driven by a variable input turbine, the compressor boosting the pressure of an input manifold of the engine and the turbine being run from the exhaust gases of the engine. The control system consists of: a computing circuit including input circuit means for receiving input signals representative of operational parameters of the engine, programmable memory means for storing predetermined tabular data and sequential and computational instructions, processor means responsive to the memory means for receiving the input signals and generating output signals as a function of the input signals, tabular data, and instructions, and output circuit means for outputing the plurality of output signals, sensor means connected to the engine and the computing circuit for sensing the pressure in the manifold, the temperature of the exhaust gases, the speed of the engine, and position of the throttle, compressor and turbine actuators of the engine and generating signals representative thereof; and actuator means connected to the output circuit means for controlling the position of the actuators in response to predetermined ones of the output signals, respectively; the computing circuit, sensor means, and actuator means defining a turbine control loop for regulating the input of the exhaust gasses to the turbine as a function of the error difference between an optimum manifold pressure of the engine and the actual manifold pressure of the engine; and a compressor control loop for regulating the output of air flow from the compressor as a function of the speed and acceleration of the engine.

Fujawa, C.S.; Masteller, S.B.

1986-06-10T23:59:59.000Z

69

Crawling the Control System  

SciTech Connect

Information about accelerator operations and the control system resides in various formats in a variety of places on the lab network. There are operating procedures, technical notes, engineering drawings, and other formal controlled documents. There are programmer references and API documentation generated by tools such as doxygen and javadoc. There are the thousands of electronic records generated by and stored in databases and applications such as electronic logbooks, training materials, wikis, and bulletin boards and the contents of text-based configuration files and log files that can also be valuable sources of information. The obvious way to aggregate all these sources is to index them with a search engine that users can then query from a web browser. Toward this end, the Google "mini" search appliance was selected and implemented because of its low cost and its simple web-based configuration and management. In addition to crawling and indexing electronic documents, the appliance provides an API that has been used to supplement search results with live control system data such as current values of EPICS process variables and graphs of recent data from the archiver.

Theodore Larrieu

2009-10-01T23:59:59.000Z

70

T-606: Sun Java System Access Manager Lets Remote Users Partially Modify  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

06: Sun Java System Access Manager Lets Remote Users Partially 06: Sun Java System Access Manager Lets Remote Users Partially Modify Data and Remote Authenticated Users Partially Access Data T-606: Sun Java System Access Manager Lets Remote Users Partially Modify Data and Remote Authenticated Users Partially Access Data April 20, 2011 - 3:58am Addthis PROBLEM: Two vulnerabilities were reported in Sun Java System Access Manager. A remote authenticated user can partially access data on the target system. A remote user can partially modify data on the target system. PLATFORM: Sun Java versions 7.1, 8.0 ABSTRACT: Sun Java System Access Manager Lets Remote Users Partially Modify Data and Remote Authenticated Users Partially Access Data. reference LINKS: SecurityTracker Alert ID: 1025408 CVE-2011-0844 CVE-2011-0847 Oracle Critical Patch Update Advisory

71

Priority-Based Internet Access Control for Fairness Improvement and Abuse Reduction  

Science Journals Connector (OSTI)

In this paper, we exploit a prioritized-service architecture and apply a priority based traffic control scheme to reduce abusive Internet access, improve fairness among users and study users. behavior under a ...

Tsung-Ching Lin; Yeali S. Sun…

2003-01-01T23:59:59.000Z

72

-MAC: An Energy-Efficient Medium Access Control for Wireless Sensor Networks  

E-Print Network (OSTI)

-MAC: An Energy-Efficient Medium Access Control for Wireless Sensor Networks Andre Barroso, Utz: ¡ a.barroso u.roedig c.sreenan¢ @cs.ucc.ie Abstract-- For the long-term deployment of wireless sensor

Roedig, Utz

73

Computerized Control of Environmental Systems  

E-Print Network (OSTI)

This paper examines the actual implementation of two computerized environmental system maintenance control centers. Project "A" is a candy manufacturing plant where controlled systems included subfreezing storage, HVAC, and cold storage (40F to 55F...

Gatti, F. L.

1980-01-01T23:59:59.000Z

74

Alarm system for a nuclear control complex  

DOE Patents (OSTI)

An advanced control room complex for a nuclear power plant, including a discrete indicator and alarm system (72) which is nuclear qualified for rapid response to changes in plant parameters and a component control system (64) which together provide a discrete monitoring and control capability at a panel (14-22, 26, 28) in the control room (10). A separate data processing system (70), which need not be nuclear qualified, provides integrated and overview information to the control room and to each panel, through CRTs (84) and a large, overhead integrated process status overview board (24). The discrete indicator and alarm system (72) and the data processing system (70) receive inputs from common plant sensors and validate the sensor outputs to arrive at a representative value of the parameter for use by the operator during both normal and accident conditions, thereby avoiding the need for him to assimilate data from each sensor individually. The integrated process status board (24) is at the apex of an information hierarchy that extends through four levels and provides access at each panel to the full display hierarchy. The control room panels are preferably of a modular construction, permitting the definition of inputs and outputs, the man machine interface, and the plant specific algorithms, to proceed in parallel with the fabrication of the panels, the installation of the equipment and the generic testing thereof.

Scarola, Kenneth (Windsor, CT); Jamison, David S. (Windsor, CT); Manazir, Richard M. (North Canton, CT); Rescorl, Robert L. (Vernon, CT); Harmon, Daryl L. (Enfield, CT)

1994-01-01T23:59:59.000Z

75

Computer network access to scientific information systems for minority universities  

Science Journals Connector (OSTI)

The evolution of computer networking technology has lead to the establishment of a massive networking infrastructure which interconnects various types of computing resources at many government academic and corporate institutions. A large segment of this infrastructure has been developed to facilitate information exchange and resource sharing within the scientific community. The National Aeronautics and Space Administration (NASA) supports both the development and the application of computer networks which provide its community with access to many valuable multi?disciplinary scientific information systems and on?line databases. Recognizing the need to extend the benefits of this advanced networking technology to the under?represented community the National Space Science Data Center (NSSDC) in the Space Data and Computing Division at the Goddard Space Flight Center has developed the Minority University?Space Interdisciplinary Network (MU?SPIN) Program: a major networking and education initiative for Historically Black Colleges and Universities (HBCUs) and Minority Universities (MUs). In this paper we will briefly explain the various components of the MU?SPIN Program while highlighting how by providing access to scientific information systems and on?line data it promotes a higher level of collaboration among faculty and students and NASA scientists.

Valerie L. Thomas; Nagi T. Wakim

1993-01-01T23:59:59.000Z

76

Thermodynamics of feedback controlled systems  

Science Journals Connector (OSTI)

We compute the entropy reduction in feedback controlled systems due to the repeated operation of the controller. This was the lacking ingredient to establish the thermodynamics of these systems, and in particular of Maxwell’s demons. We illustrate some of the consequences of our general results by deriving the maximum work that can be extracted from isothermal feedback controlled systems. As a case example, we finally study a simple system that performs an isothermal information-fueled particle pumping.

F. J. Cao and M. Feito

2009-04-10T23:59:59.000Z

77

Environmental control system  

SciTech Connect

An environmental control system for controlling the environmental conditions in a swimming pool hall 1 comprises a heat pump having a multi-section evaporator 8, compressors 23a and 23b and a multi-section condensor 18. In the day-time, the dry bulb temperature in the pool hall is maintained by circulating space air through a duct 3 to the evaporator 8 where the latent heat is recovered from the moisture laden air. This heat is rejected via the condensor 18 either to the now drier recirculated air or fresh air from an inlet 13 or a mixture of air from the two sources. In a night mode of operation, circulation of space air through the duct 3 is prevented and instead it is recirculated via a direct recirculation duct 53 and is heated by the condensor 18, the heat used to do this being recovered from outside air inducted into the evaporator 8 via an inlet 50. In order to prevent frosting of the evaporator when the outside air temperature is too low, a damper 52 may be opened to allow some space air to pass through the evaporator 8 and raise its temperature. In order to increase the heat recovery capability of the compressor, storage tank 56 is used to collect waste water from showers etc. and also from backwash through the pool water filter and when this tank is full, its water is chilled by means of a water chiller 15 in parallel with the evaporator and the heat so recovered is rejected to the re-circulating space air by means of the condensor 18.

Foley, P. N.; Turbard, A. M.

1985-05-21T23:59:59.000Z

78

A computer system for access to distributed genome mapping data  

SciTech Connect

Development of a computer system for access to distributed genome mapping data is continuing. This effort is to develop software which accesses multiple databases and retrieves data which contain information useful for accelerating mapping human chromosomes. For example, the molecular sequence databases (GenBank, EMBL Data Library, PIR, SwissProt) which contain data required for the development of oligonucleotides for probing DNA as well as for extracting data for primer pair development for PCR-based methods. It is also to develop software which qualitatively integrates the following mapping data: (1) markers regionally localized using cytogenetic methods, (2) polymorphic markers ordered by genetic linkage analysis, (3) clones ordered by various finger-printing'' methods, (4) fragments ordered by long-range restriction mapping, (5) single genomic fragments or clones that have STSs assigned to them, (6) nucleotide sequences, (7) the associated metadata such as the submitting investigator's name, location, etc; the source organism; the chromosome the element is from; the chromosomal location is whatever detail is available.

Marr, T.G.

1992-02-05T23:59:59.000Z

79

Security Metricsfor Process Control Systems  

Energy.gov (U.S. Department of Energy (DOE))

This document describes the foundations of metrics, discusses application of these metrics to control system environments, introduces a metrics taxonomy, and suggests usage of metrics to achieve...

80

Solar Energy Control System Design.  

E-Print Network (OSTI)

?? This thesis covers design, simulation and implementation of a solar energy control system for an on grid energy storage device. The design covers several… (more)

Yang, Sun

2013-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "access control system" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


81

Environment/Health/Safety/Security (EHSS): Building Access  

NLE Websites -- All DOE Office Websites (Extended Search)

Building Access Building Access Access Control - On-site access is controlled by either keys or by LBNL's automated access control system. LBNL's automated access control system is used for exterior perimeter doors to most buildings, as well as some individual labs, offices, and equipment. The access system is linked to the LBNL Human Resources PeopleSoft database and is updated with the employees' or affiliates' current appointment status at the Laboratory. . If your LBNL appointment end date has expired, then your access will be suspended. Security Access Managers (SAM) Administrators - LBNL's automated access control system is a decentralized access permission control structure managed by each Division or major program via Security Access Managers (SAM) Administrators and In-putters. Go here for the current

82

M/M/1 Queueing System with Delayed Controlled Vacation  

E-Print Network (OSTI)

M/M/1 Queueing System with Delayed Controlled Vacation Yonglu Deng , Zhongshan University W. John systems using a time division multiple access (TDMA) scheme (Frey and Takahashi, [7]). Researchers have that of a server's cold switch-on. The case of delayed vacation has also very recently been studied by Frey

Zhao, Yiqiang Q.

83

Optimal Control of Distillation Systems  

E-Print Network (OSTI)

The optimum performance of a distillation system can be evaluated by examining the product purities, the product recoveries, and the system's capability to respond to small or large, expected or unexpected, plant disturbances. An optimal control...

Chatterjee, N.; Suchdeo, S. R.

1984-01-01T23:59:59.000Z

84

Redundant marine engine control system  

SciTech Connect

An electro-mechanical engine control system is described for the shift and throttle functions of marine engines which comprises an electronically-controlled mechanical servo control means coupleable to the shift and throttle functions of a marine engine; a manually-operable ship-board operator engine shift and throttle control means; and an electro-mechanical transfer means coupled to the operator control means and to the servo control means for transferring operator shift and throttle settings to the servo control means, the transfer means being both electronically and mechanically coupled to the servo control means and being constructed and arranged whereby the transfer means will mechanically actuate the servo control means in the absence of electrical power and will electronically actuate the servo control means when electrical power is applied to the servo control means; the transfer means including coupling means preferentially electrically-coupling the operator control means to the servo control means, the coupling means being so constructed and arranged to automatically mechanically-couple the operator control means to the servo control means in the event of electrical power failure and to automatically electrically-couple the operator control means to the servo control means when electrical power is restored.

Burkenpas, R.W.

1993-06-29T23:59:59.000Z

85

Virtual Control Systems Environment (VCSE)  

SciTech Connect

Will Atkins, a Sandia National Laboratories computer engineer discusses cybersecurity research work for process control systems. Will explains his work on the Virtual Control Systems Environment project to develop a modeling and simulation framework of the U.S. electric grid in order to study and mitigate possible cyberattacks on infrastructure.

Atkins, Will

2012-10-08T23:59:59.000Z

86

Virtual Control Systems Environment (VCSE)  

ScienceCinema (OSTI)

Will Atkins, a Sandia National Laboratories computer engineer discusses cybersecurity research work for process control systems. Will explains his work on the Virtual Control Systems Environment project to develop a modeling and simulation framework of the U.S. electric grid in order to study and mitigate possible cyberattacks on infrastructure.

Atkins, Will

2014-02-26T23:59:59.000Z

87

MIMO Ad Hoc Networks: Medium Access Control, Saturation Throughput and Optimal Hop Distance  

E-Print Network (OSTI)

1 MIMO Ad Hoc Networks: Medium Access Control, Saturation Throughput and Optimal Hop Distance Ming in mobile ad hoc networks. Specifically, we focus on ad hoc networks where the spa- tial diversity technique technique can enhance the performance of mobile ad hoc networks significantly. Key words: ad hoc networks

Reisslein, Martin

88

Fine-Grain Access Control for Securing Shared Resources in Computational Grids*  

E-Print Network (OSTI)

Fine-Grain Access Control for Securing Shared Resources in Computational Grids* Abstract, grid environments, grid security, Unix accessmodel. providing an active enforcement of the security. Introduction Grid environments of the future will require an abil- ity to provide a secure execution

Lee, Ruby B.

89

A PolicyBased Access Control Mechanism for the Corporate Web  

E-Print Network (OSTI)

and Internet technologies have been used by companies or government agencies on private networks, or Intranets 08903 minsky@cs.rutgers.edu Abstract Current Web technologies use access control lists (ACLs causes management and security problems which have pre­ vented so far Intranets to achieve their full

Minsky, Naftaly

90

EA-1980: Spar Canyon-Round Valley Access Road System Improvements...  

Energy Savers (EERE)

proposed improvements to the access road system for its existing Spar Canyon-Round Valley Transmission Line located on BLM land in Custer County, Idaho. Additional information is...

91

Memory access protocol for the HOLMS low latency opto-electronic memory system  

Science Journals Connector (OSTI)

High fanin and fanout is among the chief advantages of optics allowing low latency, direct interconnects. Unfortunately high fanin system often have problems with access conflicts. We...

Carrera, Roberto Barbieri; Benabés, Philippe; Lukowicz, Paul; Wirz, Marco; Tröster, Gerhard; Gauthier, A; Oksman, J

92

Accessibility for people who are blind in public transportation systems  

Science Journals Connector (OSTI)

In order to support access for people who are blind to modes of transportation in the city, it is necessary to design technological tools that allow them to carry out activities safely, autonomously, and functionally. In this context, three mobile orientation ... Keywords: accessibility, blind people, mobility, transportation in the city

Jaime Sánchez; Marcia de Borba Campos; Matías Espinoza; Lotfi B. Merabet

2013-09-01T23:59:59.000Z

93

ACCESS CONTROL  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

do not depend on a single component to maintain effective protection against defined threats. DENIAL OF TASK. The prevention andor neutralization of a threat to preclude the...

94

Building automation systems (BAS) are concerned with control and monitoring of buildings, while aiming to  

E-Print Network (OSTI)

Building automation systems (BAS) are concerned with control and monitoring of buildings, while alarm systems or physical access control), · control the climate in the building/supervise and control operating and energy costs Realization and Experiences with a Low-Cost Building Automation Security Testbed

Behnke, Sven

95

Control Systems Cyber Security:Defense in Depth Strategies  

SciTech Connect

Information infrastructures across many public and private domains share several common attributes regarding IT deployments and data communications. This is particularly true in the control systems domain. A majority of the systems use robust architectures to enhance business and reduce costs by increasing the integration of external, business, and control system networks. However, multi-network integration strategies often lead to vulnerabilities that greatly reduce the security of an organization, and can expose mission-critical control systems to cyber threats. This document provides guidance and direction for developing ‘defense-in-depth’ strategies for organizations that use control system networks while maintaining a multi-tier information architecture that requires: Maintenance of various field devices, telemetry collection, and/or industrial-level process systems Access to facilities via remote data link or modem Public facing services for customer or corporate operations A robust business environment that requires connections among the control system domain, the external Internet, and other peer organizations.

David Kuipers; Mark Fabro

2006-05-01T23:59:59.000Z

96

Integrated control system and method  

DOE Patents (OSTI)

An integrated control system for use with an engine connected to a generator providing electrical power to a switchgear is disclosed. The engine receives gas produced by a gasifier. The control system includes an electronic controller associated with the gasifier, engine, generator, and switchgear. A gas flow sensor monitors a gas flow from the gasifier to the engine through an engine gas control valve and provides a gas flow signal to the electronic controller. A gas oversupply sensor monitors a gas oversupply from the gasifier and provides an oversupply signal indicative of gas not provided to the engine. A power output sensor monitors a power output of the switchgear and provide a power output signal. The electronic controller changes gas production of the gasifier and the power output rating of the switchgear based on the gas flow signal, the oversupply signal, and the power output signal.

Wang, Paul Sai Keat; Baldwin, Darryl; Kim, Myoungjin

2013-10-29T23:59:59.000Z

97

Pump control system for windmills  

DOE Patents (OSTI)

A windmill control system having lever means, for varying length of stroke of the pump piston, and a control means, responsive to the velocity of the wind to operate the lever means to vary the length of stroke and hence the effective displacement of the pump in accordance with available wind energy, with the control means having a sensing member separate from the windmill disposed in the wind and displaceable thereby in accordance with wind velocity.

Avery, Don E. (45-437 Akimala St., Honolulu, HI 96744)

1983-01-01T23:59:59.000Z

98

Development of Building Automation and Control Systems  

E-Print Network (OSTI)

A design flow for building automation and control systems,’’Development of Building Automation and Control Systems Yangdesign of the build- ing automation system (including the

Yang, Yang; Zhu, Qi; Maasoumy, Mehdi; Sangiovanni-Vincentelli, Alberto

2012-01-01T23:59:59.000Z

99

Access Control Service Oriented Architecture Yoon Jae Kim, yj1dreamer AT gmail.com (A project report written under  

E-Print Network (OSTI)

Access Control Service Oriented Architecture Security Yoon Jae Kim, yj1dreamer AT gmail.com (A for Portal and Web Services. Keywords Service Oriented Architecture, SOA, SOA Security, Web Service, Web Language, access control Table of Contents 1. Introduction to Service Oriented Architecture Security 2

Jain, Raj

100

XAS: a system for accessing componentized, virtual XML documents  

Science Journals Connector (OSTI)

XML is emerging as an important format for describing the schema of documents and data to facilitate integration of applications in a variety of industry domains. An important issue that naturally arises is the requirement to generate, store and access ...

Ming-Ling Lo; Shyh-Kwei Chen; Sriram Padmanabhan; Jen-Yao Chung

2001-07-01T23:59:59.000Z

Note: This page contains sample records for the topic "access control system" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


101

Using Virtual Organizations Membership System with EDG's Grid Security and Database Access  

E-Print Network (OSTI)

Using Virtual Organizations Membership System with EDG's Grid Security and Database Access Marko University of Technology March 17, 2004 Keywords: Grid security, virtual organizations, Grid use case. This paper describes the European Data Grid's (EDG's) java security system and Spitfire database access

Haak, Hein

102

Position feedback control system  

DOE Patents (OSTI)

Disclosed is a system and method for independently evaluating the spatial positional performance of a machine having a movable member, comprising an articulated coordinate measuring machine comprising: a first revolute joint; a probe arm, having a proximal end rigidly attached to the first joint, and having a distal end with a probe tip attached thereto, wherein the probe tip is pivotally mounted to the movable machine member; a second revolute joint; a first support arm serially connecting the first joint to the second joint; and coordinate processing means, operatively connected to the first and second revolute joints, for calculating the spatial coordinates of the probe tip; means for kinematically constraining the articulated coordinate measuring machine to a working surface; and comparator means, in operative association with the coordinate processing means and with the movable machine, for comparing the true position of the movable machine member, as measured by the true position of the probe tip, with the desired position of the movable machine member.

Bieg, Lothar F. (Albuquerque, NM); Jokiel, Jr., Bernhard (Albuquerque, NM); Ensz, Mark T. (Albuquerque, NM); Watson, Robert D. (Tijeras, NM)

2003-01-01T23:59:59.000Z

103

Towards scarless surgery: an endoscopic-ultrasound navigation system for transgastric access procedures  

Science Journals Connector (OSTI)

Scarless surgery is a new and very promising technique that can mark a new era in surgical procedures. We have created and validated a navigation system for endoscopic and transgastric access interventions in in vivo pilot studies. The system ...

Raúl San José Estépar; Nicholas Stylopoulos; Randy E. Ellis; Eigil Samset; Carl-Fredrik Westin; Christopher Thompson; Kirby Vosburgh

2006-10-01T23:59:59.000Z

104

E-Print Network 3.0 - access denial systems Sample Search Results  

NLE Websites -- All DOE Office Websites (Extended Search)

denial systems Search Powered by Explorit Topic List Advanced Search Sample search results for: access denial systems Page: << < 1 2 3 4 5 > >> 1 Wireless Denial of ServiceWireless...

105

Magnetohydrodynamic boundary layer control system  

SciTech Connect

Accordingly, it is an object of the present invention to provide an active boundary layer control system which is lightweight, operates with low in put power, and occupies little physical space. It is a further object of the invention to provide a boundary layer control system which is robust and can be operated in a damaged condition without creating a hazard to the vehicle. It is yet object of the invention to provide a magnetohydrodynamic (MHD) boundary layer control system for marine vehicles which provides a force directly on the water adjacent to the vehicle hull to provide flow separation control. The invention is a boundary layer control system using magnetic and electric fields interaction to providea driving force to energize boundary layer flow around a marine vehicle. A plurality of magnets are located circumferentially around the hull. Seawater electrodes are placed between each of the magnets and between the poles of each magnet. The resulting interaction of the electric and magnetic fields produces a Lorentz force which reduces the turbulence and may even relaminarize the flow in the boundary layer.

Meng, J.C.

1993-02-11T23:59:59.000Z

106

Proton beam therapy control system  

DOE Patents (OSTI)

A tiered communications architecture for managing network traffic in a distributed system. Communication between client or control computers and a plurality of hardware devices is administered by agent and monitor devices whose activities are coordinated to reduce the number of open channels or sockets. The communications architecture also improves the transparency and scalability of the distributed system by reducing network mapping dependence. The architecture is desirably implemented in a proton beam therapy system to provide flexible security policies which improve patent safety and facilitate system maintenance and development.

Baumann, Michael A. (Riverside, CA); Beloussov, Alexandre V. (Bernardino, CA); Bakir, Julide (Alta Loma, CA); Armon, Deganit (Redlands, CA); Olsen, Howard B. (Colton, CA); Salem, Dana (Riverside, CA)

2008-07-08T23:59:59.000Z

107

Proton beam therapy control system  

DOE Patents (OSTI)

A tiered communications architecture for managing network traffic in a distributed system. Communication between client or control computers and a plurality of hardware devices is administered by agent and monitor devices whose activities are coordinated to reduce the number of open channels or sockets. The communications architecture also improves the transparency and scalability of the distributed system by reducing network mapping dependence. The architecture is desirably implemented in a proton beam therapy system to provide flexible security policies which improve patent safety and facilitate system maintenance and development.

Baumann, Michael A. (Riverside, CA); Beloussov, Alexandre V. (San Bernardino, CA); Bakir, Julide (Alta Loma, CA); Armon, Deganit (Longmeadow, MA); Olsen, Howard B. (Irvine, CA); Salem, Dana (Riverside, CA)

2010-09-21T23:59:59.000Z

108

Proton beam therapy control system  

DOE Patents (OSTI)

A tiered communications architecture for managing network traffic in a distributed system. Communication between client or control computers and a plurality of hardware devices is administered by agent and monitor devices whose activities are coordinated to reduce the number of open channels or sockets. The communications architecture also improves the transparency and scalability of the distributed system by reducing network mapping dependence. The architecture is desirably implemented in a proton beam therapy system to provide flexible security policies which improve patent safety and facilitate system maintenance and development.

Baumann, Michael A; Beloussov, Alexandre V; Bakir, Julide; Armon, Deganit; Olsen, Howard B; Salem, Dana

2013-06-25T23:59:59.000Z

109

Particulate Emissions Control by Advanced Filtration Systems...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Particulate Emissions Control by Advanced Filtration Systems or GDI Engines Particulate Emissions Control by Advanced Filtration Systems or GDI Engines 2013 DOE Hydrogen and Fuel...

110

Secure control systems with application to cyber-physical systems  

Science Journals Connector (OSTI)

Control systems are computer-based systems with networked units consisting of sensors, actuators, control processing units, and communication devices. The role of control system is to interact, monitor, and control physical processes. Reactive power ... Keywords: SCADA systems, cyber-physical systems, secure control, security

Jin Dong; Seddik. M. Djouadi; James J. Nutaro; Teja Kuruganti

2014-04-01T23:59:59.000Z

111

Open Access  

NLE Websites -- All DOE Office Websites (Extended Search)

Communication » Communication » Open Access Open Access Open access (OA) is the practice of providing unrestricted access via the Internet to peer-reviewed scholarly journal articles. Learn more below... Questions? Open Access Email Open access publishing and publications have experienced substantial growth, expansion and uptake in recent years. What exactly is an open access publication? There are many definitions, but in a nutshell an open access publication is a publication that provides immediately free online access to all users worldwide. This may sound like a tall order, and yet there are to date over 4000 journal publications that fit this definition. The need for this type of access has been driven by the out-of-control costs for scholarly publications. Statistics kept by the Association for Research Libraries

112

Open architecture in control system integration  

SciTech Connect

Open architecture offers the manufacturing community a number of advantages in the integration of future machine control systems. Among these advantages is the ability to upgrade and take advantage of innovative new control strategies. A key enabling technology in open architecture control systems is the digital signal processor (DSP). DSPs can be used to provide a complete control system or can enhance the computational capability of larger control systems. The use of DSPs in the integration of open architecture control systems is discussed, including their impact on reliability and control system functionality. In addition, the role of DSPs in control system architecture is addressed.

Wysor, R.W. [Oak Ridge National Lab., TN (United States); Carnal, C.L. [Tennessee Technological Univ., Cookeville, TN (United States); Igou, R.E. [Oak Ridge Y-12 Plant, TN (United States)

1993-09-01T23:59:59.000Z

113

Cyber Incidents Involving Control Systems  

SciTech Connect

The Analysis Function of the US-CERT Control Systems Security Center (CSSC) at the Idaho National Laboratory (INL) has prepared this report to document cyber security incidents for use by the CSSC. The description and analysis of incidents reported herein support three CSSC tasks: establishing a business case; increasing security awareness and private and corporate participation related to enhanced cyber security of control systems; and providing informational material to support model development and prioritize activities for CSSC. The stated mission of CSSC is to reduce vulnerability of critical infrastructure to cyber attack on control systems. As stated in the Incident Management Tool Requirements (August 2005) ''Vulnerability reduction is promoted by risk analysis that tracks actual risk, emphasizes high risk, determines risk reduction as a function of countermeasures, tracks increase of risk due to external influence, and measures success of the vulnerability reduction program''. Process control and Supervisory Control and Data Acquisition (SCADA) systems, with their reliance on proprietary networks and hardware, have long been considered immune to the network attacks that have wreaked so much havoc on corporate information systems. New research indicates this confidence is misplaced--the move to open standards such as Ethernet, Transmission Control Protocol/Internet Protocol, and Web technologies is allowing hackers to take advantage of the control industry's unawareness. Much of the available information about cyber incidents represents a characterization as opposed to an analysis of events. The lack of good analyses reflects an overall weakness in reporting requirements as well as the fact that to date there have been very few serious cyber attacks on control systems. Most companies prefer not to share cyber attack incident data because of potential financial repercussions. Uniform reporting requirements will do much to make this information available to Department of Homeland Security (DHS) and others who require it. This report summarizes the rise in frequency of cyber attacks, describes the perpetrators, and identifies the means of attack. This type of analysis, when used in conjunction with vulnerability analyses, can be used to support a proactive approach to prevent cyber attacks. CSSC will use this document to evolve a standardized approach to incident reporting and analysis. This document will be updated as needed to record additional event analyses and insights regarding incident reporting. This report represents 120 cyber security incidents documented in a number of sources, including: the British Columbia Institute of Technology (BCIT) Industrial Security Incident Database, the 2003 CSI/FBI Computer Crime and Security Survey, the KEMA, Inc., Database, Lawrence Livermore National Laboratory, the Energy Incident Database, the INL Cyber Incident Database, and other open-source data. The National Memorial Institute for the Prevention of Terrorism (MIPT) database was also interrogated but, interestingly, failed to yield any cyber attack incidents. The results of this evaluation indicate that historical evidence provides insight into control system related incidents or failures; however, that the limited available information provides little support to future risk estimates. The documented case history shows that activity has increased significantly since 1988. The majority of incidents come from the Internet by way of opportunistic viruses, Trojans, and worms, but a surprisingly large number are directed acts of sabotage. A substantial number of confirmed, unconfirmed, and potential events that directly or potentially impact control systems worldwide are also identified. Twelve selected cyber incidents are presented at the end of this report as examples of the documented case studies (see Appendix B).

Robert J. Turk

2005-10-01T23:59:59.000Z

114

E-Print Network 3.0 - access mri system Sample Search Results  

NLE Websites -- All DOE Office Websites (Extended Search)

search results for: access mri system Page: << < 1 2 3 4 5 > >> 1 NeuroImage Human Brain Mapping 2000 Meeting Poster No.: 916 Summary: NeuroImage Human Brain Mapping 2000...

115

URMC Systems Access Agreement Version 2 Page 1 of 3 Revised 2/28/2011  

E-Print Network (OSTI)

remedies which URMC may have upon actual or threatened violation of this Agreement. #12;URMC Systems Access by the URMC Privacy Officer to assist with the investigation. If the investigation confirms improper use

Goldman, Steven A.

116

Environmental Assessment for Proposed Access Control and Traffic Improvements at Los Alamos National Laboratory, Los Alamos, New Mexico  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

29 29 Environmental Assessment for Proposed Access Control and Traffic Improvements at Los Alamos National Laboratory, Los Alamos, New Mexico August 23, 2002 Department of Energy National Nuclear Security Administration Los Alamos Site Office Environmental Assessment for Proposed Access Control and Traffic Improvements at LANL DOE LASO August 23, 2002 iii Contents ACRONYMS AND TERMS ......................................................................................................... VI EXECUTIVE SUMMARY......................................................................................................... VIII 1.0 PURPOSE AND NEED ............................................................................................................

117

Automatic Control Technology in the HVAC System  

Science Journals Connector (OSTI)

In the field of VAV air-conditioning system (Variable Air Volume, VAV) control theory and practical study, the paper analyzed the methods used by the China's VAV control procedures including Static Pressure Control, Variable Pressure Control and Total ...

Ren Tao; Gao Jingmin; Jia Wenwen

2009-01-01T23:59:59.000Z

118

HVDC control developments - addressing system requirements  

SciTech Connect

This article describes typical high voltage direct current (HVDC) control systems and some of the new developments in the control area. HVDC control systems are showing their flexible characteristics as demonstrated, for example, by the new modulation, torsional damping, and alternating current voltage and reactive power controllers. Extensive studies are conducted to design and integrate such controllers into HVDC systems and to assure against any detrimental interactions within the total control system. 8 figures.

Hauth, R.L.; Patel, H.S.; Piwko, R.J.

1984-01-01T23:59:59.000Z

119

RBAC Driven Least Privilege Architecture For Control Systems  

SciTech Connect

The concept of role based access control (RBAC) within the IT environment has been studied by researchers and was supported by NIST (circa 1992). This earlier work highlighted the benefits of RBAC which include reduced administrative workload and policies which are easier to analyze and apply. The goals of this research were to expand the application of RBAC in the following ways. • Apply RBAC to the control systems environment: The typical RBAC model within the IT environment is used to control a user’s access to files. Within the control system environment files are replaced with measurement (e.g., temperature) and control (e.g. valve) points organized as a hierarchy of control assets (e.g. a boiler, compressor, refinery unit). Control points have parameters (e.g., high alarm limit, set point, etc.) associated with them. The RBAC model is extended to support access to points and their parameters based upon roles while at the same time allowing permissions for the points to be defined at the asset level or point level directly. In addition, centralized policy administration with distributed access enforcement mechanisms was developed to support the distributed architecture of distributed control systems and SCADA. • Extend the RBAC model to include access control for software and devices: The established RBAC approach is to assign users to roles. This work extends that notion by first breaking the control system down into three layers 1) users, 2) software and 3) devices. An RBAC model is then created for each of these three layers. The result is that RBAC can be used to define machine-to-machine policy enforced via the IP security (IPsec) protocol. This highlights the potential to use RBAC for machine-to-machine connectivity within the internet of things. • Enable dynamic policy based upon the operating mode of the system: The IT environment is generally static with respect to policy. However, large cyber physical systems such as industrial controls have various operating modes (start-up, normal operation, emergency, shut-down and maintenance are typical). The policy enforcement architecture must be able to support changes in access permissions as the mode of the control system changes. For example an operator’s role may not allow the operator to shut down a pump during “normal operation” but that same operator role may be given permission to shut down the pump if the refinery transitions to “emergency” mode. The effectiveness of the approach was validated by applying it to the Experion Process Knowledge System. This is a large commercial industrial control system often used to control oil refineries and other assets within the oil and gas sector. As a by-product, other industries using Experion (Pharmaceuticals, Specialty Chemicals, etc.) also benefit from increased security. Policies representative of those that would be used within an oil refinery were created and validated against the RBAC model as implemented in the underlying SQL database. The administration of policy is simplified which in turn makes it practical for security administrators to specify policies which enforce least privilege. The result is a qualitative reduction in risk. The benefits of the enhanced RBAC model are clear and as a result. Honeywell is incorporating portions of the RBAC research into the 2014 release of Experion.

Hull, Julie; Markham, Mark

2014-01-25T23:59:59.000Z

120

Heat engine generator control system  

DOE Patents (OSTI)

An electrical power generation system includes a heat engine having an output member operatively coupled to the rotor of a dynamoelectric machine. System output power is controlled by varying an electrical parameter of the dynamoelectric machine. A power request signal is related to an engine speed and the electrical parameter is varied in accordance with a speed control loop. Initially, the sense of change in the electrical parameter in response to a change in the power request signal is opposite that required to effectuate a steady state output power consistent with the power request signal. Thereafter, the electrical parameter is varied to converge the output member speed to the speed known to be associated with the desired electrical output power.

Rajashekara, Kaushik (Carmel, IN); Gorti, Bhanuprasad Venkata (Towson, MD); McMullen, Steven Robert (Anderson, IN); Raibert, Robert Joseph (Fishers, IN)

1998-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "access control system" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


121

Heat engine generator control system  

DOE Patents (OSTI)

An electrical power generation system includes a heat engine having an output member operatively coupled to the rotor of a dynamoelectric machine. System output power is controlled by varying an electrical parameter of the dynamoelectric machine. A power request signal is related to an engine speed and the electrical parameter is varied in accordance with a speed control loop. Initially, the sense of change in the electrical parameter in response to a change in the power request signal is opposite that required to effectuate a steady state output power consistent with the power request signal. Thereafter, the electrical parameter is varied to converge the output member speed to the speed known to be associated with the desired electrical output power. 8 figs.

Rajashekara, K.; Gorti, B.V.; McMullen, S.R.; Raibert, R.J.

1998-05-12T23:59:59.000Z

122

Scheduling Heterogeneous Wireless Systems for Efficient Spectrum Access  

E-Print Network (OSTI)

Radio approach for usage of the Virtual Unlicensed Spectrum (CORVUS) system exploits unoccupied licensed

Bao, Lichun; Liao, Shenghui

2010-01-01T23:59:59.000Z

123

Copyright 2000, 2013 Board of Regents of the University of Wisconsin System WebAccess Policy, Page 1/2 World Wide Web Accessibility Policy  

E-Print Network (OSTI)

Copyright © 2000, 2013 Board of Regents of the University of Wisconsin System WebAccess Policy, Page 1/2 UW-Madison World Wide Web Accessibility Policy Policy 1. All new or revised Web pages and other Web resources published, hosted or otherwise provided by the University must be in compliance

Wisconsin at Madison, University of

124

Demystifying Open Access  

SciTech Connect

The tenets of Open Access are to grant anyone, anywhere and anytime free access to the results of scientific research. HEP spearheaded the Open Access dissemination of scientific results with the mass mailing of preprints in the pre-WWW era and with the launch of the arXiv preprint system at the dawn of the '90s. The HEP community is now ready for a further push to Open Access while retaining all the advantages of the peer-review system and, at the same time, bring the spiralling cost of journal subscriptions under control. I will present a possible plan for the conversion to Open Access of HEP peer-reviewed journals, through a consortium of HEP funding agencies, laboratories and libraries: SCOAP3 (Sponsoring Consortium for Open Access Publishing in Particle Physics). SCOAP3 will engage with scientific publishers towards building a sustainable model for Open Access publishing, which is as transparent as possible for HEP authors. The current system in which journals income comes from subscription fees is replaced with a scheme where SCOAP3 compensates publishers for the costs incurred to organise the peer-review service and give Open Access to the final version of articles. SCOAP3 will be funded by all countries active in HEP under a 'fair share' scenario, according to their production of HEP articles. In this talk I will present a short overview of the history of Open Access in HEP, the details of the SCOAP3 model and the outlook for its implementation.

Mele, Salvatore

2007-05-14T23:59:59.000Z

125

Power-Saving in Storage Systems for Internet Hosting Services with Data Access Prediction  

E-Print Network (OSTI)

percentage of the total computing energy is consumed by the storage systems, various attempts at reducingPower-Saving in Storage Systems for Internet Hosting Services with Data Access Prediction Jumpei@cs.tsukuba.ac.jp Abstract--We present a power-saving method for storage systems in Internet hosting services, particularly

Banbara, Mutsunori

126

Marathon pipe line's new control system  

SciTech Connect

A new control system for Marathon Pipe Line Company's 4200 mile long oil pipeline is described. The pipeline transports 1 1/2 million barrels/day of crude oil and refined products. A comprehensive, centralized computer control system in Findlay, Ohio was developed to provide precision control of the system. Marathon is almost finished with the supervisory control and data acquisition system which can almost instantaneously control fluid movements throughout the network with the push of a few buttons.

Ross, J.

1983-03-01T23:59:59.000Z

127

Recommended Security Controls for Federal Information Systems...  

NLE Websites -- All DOE Office Websites (Extended Search)

NIST 800-53 Revision 3 + Draft Revision 4 Recommended Security Controls for Federal Information Systems and Organizations Note: CNTL NO. Table D2: Security Control Base Lines...

128

An Access Control System for Multimedia Content Distribution  

E-Print Network (OSTI)

,gabilm,jlaguna,skarmeta}@dif.um.es {ocanovas}@ditec.um.es Abstract Multimedia content distribution has appeared as a new growth mar- ket field. In this paper, we propose a new scheme which takes advantage of a previously existing underlying is the one proposed by the VIDIOS project, which defines an architecture for multimedia transmissions across

Sánchez Cuenca, Manuel

129

An Access Control System for Multimedia Content Distribution  

Science Journals Connector (OSTI)

Multimedia content distribution has appeared as a new growth market offered by network providers, defining ... field. In this paper, we propose a new scheme which takes advantage of a previously ... target scenar...

Manuel Sánchez; Gabriel López; Óscar Cánovas; Juan A. Sánchez…

2006-01-01T23:59:59.000Z

130

T-592: Cisco Security Advisory: Cisco Secure Access Control System...  

Office of Environmental Management (EM)

can change the passwords of arbitrary users. PLATFORM: Cisco Secure ACS versions 5.1 patch 3, 4, and 5; 5.2; 5.2 patch 1 and 2 ABSTRACT: Cisco Secure ACS operates as a...

131

SP 800-82. Guide to Industrial Control Systems (ICS) Security: Supervisory Control and Data Acquisition (SCADA) systems, Distributed Control Systems (DCS), and other control system configurations such as Programmable Logic Controllers (PLC)  

Science Journals Connector (OSTI)

The purpose of this document is to provide guidance for securing industrial control systems (ICS), including supervisory control and data acquisition (SCADA) systems, distributed control systems (DCS), and other systems performing control functions. ... Keywords: Cyber-physcial systems, ICS, Industrial Control Systems, SCADA, Supervisory Control and Data Acquisition, security controls, threats, vulnerabilities

Keith A. Stouffer; Joseph A. Falco; Karen A. Scarfone

2011-06-01T23:59:59.000Z

132

Generation-based memory synchronization in a multiprocessor system with weakly consistent memory accesses  

DOE Patents (OSTI)

In a multiprocessor system, a central memory synchronization module coordinates memory synchronization requests responsive to memory access requests in flight, a generation counter, and a reclaim pointer. The central module communicates via point-to-point communication. The module includes a global OR reduce tree for each memory access requesting device, for detecting memory access requests in flight. An interface unit is implemented associated with each processor requesting synchronization. The interface unit includes multiple generation completion detectors. The generation count and reclaim pointer do not pass one another.

Ohmacht, Martin

2014-09-09T23:59:59.000Z

133

Practical forensic analysis in advanced access content system  

Science Journals Connector (OSTI)

In this paper we focus on the use of a traitor tracing scheme for distribution models that are one-to-many. It can be a networked broadcast system; It can be based on prerecorded or recordable physical media. In this type of system, it is infeasible ...

Hongxia Jin; Jeffery Lotspiech

2006-04-01T23:59:59.000Z

134

DOWNHOLE VIBRATION MONITORING & CONTROL SYSTEM  

SciTech Connect

The deep hard rock drilling environment induces severe vibrations into the drillstring, which can cause reduced rates of penetration (ROP) and premature failure of the equipment. The only current means of controlling vibration under varying conditions is to change either the rotary speed or the weight-on-bit (WOB). These changes often reduce drilling efficiency. Conventional shock subs are useful in some situations, but often exacerbate the problems. The objective of this project is development of a unique system to monitor and control drilling vibrations in a ''smart'' drilling system. This system has two primary elements: (1) The first is an active vibration damper (AVD) to minimize harmful axial, lateral and torsional vibrations. The hardness of this damper will be continuously adjusted using a robust, fast-acting and reliable unique technology. (2) The second is a real-time system to monitor drillstring vibration, and related parameters. This monitor adjusts the damper according to local conditions. In some configurations, it may also send diagnostic information to the surface via real-time telemetry. The AVD is implemented in a configuration using magnetorheological (MR) fluid. By applying a current to the magnetic coils in the damper, the viscosity of the fluid can be changed rapidly, thereby altering the damping coefficient in response to the measured motion of the tool. Phase I of this program entailed modeling and design of the necessary subsystems and design, manufacture and test of a full laboratory prototype. Phase I of the project was completed by the revised end date of May 31, 2004. The objectives of this phase were met, and all prerequisites for Phase II have been completed.

Martin E. Cobern

2004-08-31T23:59:59.000Z

135

OCTOBER 2013 IEEE CONTROL SYSTEMS MAGAZINE 23 PEOPLE IN CONTROL  

E-Print Network (OSTI)

papers and ten monographs in systems and control, unmanned systems, and financial market modeling served as an editor of SIAM Jour- nal on Control and Optimization, IEEE Transactions on Robotics Systems, and IEEE Transactions on Automation Science and Engineering, and on the program committees

Benmei, Chen

136

Sandia National Laboratories: power flow control system  

NLE Websites -- All DOE Office Websites (Extended Search)

power flow control system ECIS-Princeton Power Systems, Inc.: Demand Response Inverter On March 19, 2013, in DETL, Distribution Grid Integration, Energy, Energy Surety, Facilities,...

137

Multi-radio medium access control protocol for wireless sensor networks  

Science Journals Connector (OSTI)

This paper describes a dual-radio based medium access control protocol for wireless sensor networks. Our protocol combines the advantages of the two radios operating in different frequency bands to result in highly energy-efficient operation. The design effectively addresses the two dominant sources of energy consumption in sensor network communication, namely the idle listening and the ephemeral burst data traffic. This paper presents the design rationale and extensive empirical performance evaluation of the protocol in terms of power consumption and latency under various traffic loads and duty cycles. Experimental performance comparison with B-MAC show high gains of our approach. We derive analytical expression for the optimum transmit power level ratio of the two radios giving minimum energy consumption. We also model the mathematical relationship for the optimal duty cycle of the nodes to a given network traffic load and validate it through the prototype implementation on commercially available sensor nodes.

Junaid Ansari; Xi Zhang; Petri Mahonen

2010-01-01T23:59:59.000Z

138

Development of Building Automation and Control Systems  

E-Print Network (OSTI)

Johnson Controls, 70 in Automated Logic EIKON language, 42systems developed by Automated Logic. Similarly as shown in

Yang, Yang; Zhu, Qi; Maasoumy, Mehdi; Sangiovanni-Vincentelli, Alberto

2012-01-01T23:59:59.000Z

139

Operational Control of Electricity Supply Systems  

Science Journals Connector (OSTI)

... to develop, the common-diagram control system, which enables an almost unlimited number of substations, etc., to be controlled completely from one diagram and control panel, and is ... of an undertaking. It describes a wall-type system diagram which automatically indicates, which substations have changed conditions, and therefore the area involved in any disturbance. The system diagram ...

1945-09-22T23:59:59.000Z

140

IN TELLIGENT CONTROLLING SYSTEM OF AQUICULTURE ENVIRONMENT  

E-Print Network (OSTI)

network, Decoupling control 1. INTRODUCTION Aquiculture environment is a complex system engineering which, the PLC ,engineers stations and director #12;In telligent Controlling System of aquiculture Environment 3IN TELLIGENT CONTROLLING SYSTEM OF AQUICULTURE ENVIRONMENT Deshen Zhao ,*1 1 Department of Electric

Paris-Sud XI, Université de

Note: This page contains sample records for the topic "access control system" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


141

DOWNHOLE VIBRATION MONITORING & CONTROL SYSTEM  

SciTech Connect

The objective of this program is to develop a system to both monitor the vibration of a bottomhole assembly, and to adjust the properties of an active damper in response to these measured vibrations. Phase I of this program, which entailed modeling and design of the necessary subsystems and design, manufacture and test of a full laboratory prototype, was completed on May 31, 2004. The principal objectives of Phase II are: more extensive laboratory testing, including the evaluation of different feedback algorithms for control of the damper; design and manufacture of a field prototype system; and, testing of the field prototype in drilling laboratories and test wells. Work during this quarter centered on the rebuilding of the prototype using the improved valve design described in the last report. Most of the components have been received and assembly has begun. Testing is expected to resume in August. In April, a paper was presented at the American Association of Drilling Engineers National Technical Conference in Houston. The paper was well received, and several oilfield service and supply companies sent inquiries regarding commercial distribution of the system. These are currently being pursued, but none have yet been finalized.

Martin E. Cobern

2005-07-27T23:59:59.000Z

142

Fuzzy logic control and optimization system  

DOE Patents (OSTI)

A control system (300) for optimizing a power plant includes a chemical loop having an input for receiving an input signal (369) and an output for outputting an output signal (367), and a hierarchical fuzzy control system (400) operably connected to the chemical loop. The hierarchical fuzzy control system (400) includes a plurality of fuzzy controllers (330). The hierarchical fuzzy control system (400) receives the output signal (367), optimizes the input signal (369) based on the received output signal (367), and outputs an optimized input signal (369) to the input of the chemical loop to control a process of the chemical loop in an optimized manner.

Lou, Xinsheng (West Hartford, CT)

2012-04-17T23:59:59.000Z

143

Bringing Control System User Interfaces to the Web  

SciTech Connect

With the evolution of web based technologies, especially HTML5 [1], it becomes possible to create web-based control system user interfaces (UI) that are cross-browser and cross-device compatible. This article describes two technologies that facilitate this goal. The first one is the WebOPI [2], which can seamlessly display CSS BOY [3] Operator Interfaces (OPI) in web browsers without modification to the original OPI file. The WebOPI leverages the powerful graphical editing capabilities of BOY and provides the convenience of re-using existing OPI files. On the other hand, it uses generic JavaScript and a generic communication mechanism between the web browser and web server. It is not optimized for a control system, which results in unnecessary network traffic and resource usage. Our second technology is the WebSocket-based Process Data Access (WebPDA) [4]. It is a protocol that provides efficient control system data communication using WebSocket [5], so that users can create web-based control system UIs using standard web page technologies such as HTML, CSS and JavaScript. WebPDA is control system independent, potentially supporting any type of control system.

Chen, Xihui [ORNL] [ORNL; Kasemir, Kay [ORNL] [ORNL

2013-01-01T23:59:59.000Z

144

Control Systems Security Standards: Accomplishments And Impacts |  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Control Systems Security Standards: Accomplishments And Impacts Control Systems Security Standards: Accomplishments And Impacts Control Systems Security Standards: Accomplishments And Impacts This report describes the accomplishments and impacts of the standards team towards achieving these three goals and describes the follow-on efforts that need to be made toward meeting the priority strategies defined in the DOE/DHS Roadmap to Secure Control Systems in the Energy Sector. Control Systems Security Standards: Accomplishments & Impacts More Documents & Publications A Summary of Control System Security Standards Activities in the Energy Sector (October 2005) Roadmap to Secure Control Systems in the Energy Sector 2006 - Presentation to the 2008 ieRoadmap Workshop DOE/OE National SCADA Test Bed Fiscal Year 2009 Work Plan

145

Downhole Vibration Monitoring & Control System  

SciTech Connect

The objective of this program is to develop a system to both monitor the vibration of a bottomhole assembly, and to adjust the properties of an active damper in response to these measured vibrations. Phase I of this program, which entailed modeling and design of the necessary subsystems and design, manufacture and test of a full laboratory prototype, was completed on May 31, 2004. The principal objectives of Phase II were: more extensive laboratory testing, including the evaluation of different feedback algorithms for control of the damper; design and manufacture of a field prototype system; and, testing of the field prototype in a drilling laboratory. Phase II concluded on January 31, 2006, and the Phase II final report was issued. Work on Phase III of the project began during the first quarter, 2006. Efforts the current quarter have continued to focus on the manufacture of the prototype and precommercial parts, field test planning and commercialization. The continued extreme lead times quoted by oilfield machine shops for collar components significantly delayed the deployment of the prototype and precommercial units. All parts have now been received for two units, and all but one for the third. Mechanical assembly of the first two systems is complete and the electronics installation and laboratory testing will be finished in April. We have entered into a Memorandum of Understanding with a major US oilfield equipment supplier, which calls for their assisting with our field tests, in cash and in kind. We are close to signing a definitive agreement which includes the purchase of the three precommercial units. We had also signed a CRADA with the Rocky Mountain Oilfield Test Center (RMOTC), and scheduled a test at their site, The RMOTC drilling schedule continues to slip, and the test cannot begin until the first week of May. Based on these factors, we have requested a no-cost extension to July 31, 2007.

Martin E. Cobern

2007-03-31T23:59:59.000Z

146

Monitored Geologic Repository Operations Monitoring and Control System Description Document  

SciTech Connect

The Monitored Geologic Repository Operations Monitoring and Control System provides supervisory control, monitoring, and selected remote control of primary and secondary repository operations. Primary repository operations consist of both surface and subsurface activities relating to high-level waste receipt, preparation, and emplacement. Secondary repository operations consist of support operations for waste handling and treatment, utilities, subsurface construction, and other selected ancillary activities. Remote control of the subsurface emplacement operations, as well as, repository performance confirmation operations are the direct responsibility of the system. In addition, the system monitors parameters such as radiological data, air quality data, fire detection status, meteorological conditions, unauthorized access, and abnormal operating conditions, to ensure a safe workplace for personnel. Parameters are displayed in a real-time manner to human operators regarding surface and subsurface conditions. The system performs supervisory monitoring and control for both important to safety and non-safety systems. The system provides repository operational information, alarm capability, and human operator response messages during emergency response situations. The system also includes logic control to place equipment, systems, and utilities in a safe operational mode or complete shutdown during emergency response situations. The system initiates alarms and provides operational data to enable appropriate actions at the local level in support of emergency response, radiological protection response, evacuation, and underground rescue. The system provides data communications, data processing, managerial reports, data storage, and data analysis. This system's primary surface and subsurface operator consoles, for both supervisory and remote control activities, will be located in a Central Control Center (CCC) inside one of the surface facility buildings. The system consists of instrument and control equipment and components necessary to provide human operators with sufficient information to monitor and control the operation of the repository in an efficient and safe manner. The system consists of operator consoles and workstations, multiple video display terminals, communications and interfacing equipment, and instrument and control software with customized configuration to meet the needs of the Monitored Geologic Repository (MGR). Process and logic controllers and the associated input/output units of each system interfaced with this system will be configured into Remote Terminal Units (RTU) and located close to the systems to be monitored and controlled. The RTUs are configured to remain operational should communication with CCC operations be lost. The system provides closed circuit television to selectively view systems, operations, and equipment areas and to aid in the operation of mechanical systems. Control and monitoring of site utility systems will be located in the CCC. Site utilities include heating, ventilation, and air conditioning equipment; plant compressed air; plant water; firewater; electrical systems; and inert gases, such as nitrogen, if required. This system interfaces with surface and subsurface systems that either generate output data or require remote control input. The system interfaces with the Site Communications System for bulk storage of operational data, on-site and off-site communication, and a plant-wide public announcement system. The system interfaces with the Safeguards and Security System to provide operational status and emergency alarm indications. The system interfaces with the Site Operation System to provide site wide acquisition of data for analysis and reports, historical information for trends, utility information for plant operation, and to receive operating plans and procedures.

E.F. Loros

2000-06-29T23:59:59.000Z

147

Wireless Control Systems:Wireless Control Systems: Scientific Challenges andScientific Challenges and  

E-Print Network (OSTI)

Wireless Control Systems:Wireless Control Systems: Scientific Challenges andScientific Challenges and Emerging ApplicationsEmerging Applications Karl Henrik Johansson School of Electrical Engineering Royal, Greece 27-29 Jun, 2007 © Karl H. Johansson, Wireless control Acknowledgements

Johansson, Karl Henrik

148

Indicator system for a process plant control complex  

DOE Patents (OSTI)

An advanced control room complex for a nuclear power plant, including a discrete indicator and alarm system (72) which is nuclear qualified for rapid response to changes in plant parameters and a component control system (64) which together provide a discrete monitoring and control capability at a panel (14-22, 26, 28) in the control room (10). A separate data processing system (70), which need not be nuclear qualified, provides integrated and overview information to the control room and to each panel, through CRTs (84) and a large, overhead integrated process status overview board (24). The discrete indicator and alarm system (72) and the data processing system (70) receive inputs from common plant sensors and validate the sensor outputs to arrive at a representative value of the parameter for use by the operator during both normal and accident conditions, thereby avoiding the need for him to assimilate data from each sensor individually. The integrated process status board (24) is at the apex of an information hierarchy that extends through four levels and provides access at each panel to the full display hierarchy. The control room panels are preferably of a modular construction, permitting the definition of inputs and outputs, the man machine interface, and the plant specific algorithms, to proceed in parallel with the fabrication of the panels, the installation of the equipment and the generic testing thereof.

Scarola, Kenneth (Windsor, CT); Jamison, David S. (Windsor, CT); Manazir, Richard M. (North Canton, CT); Rescorl, Robert L. (Vernon, CT); Harmon, Daryl L. (Enfield, CT)

1993-01-01T23:59:59.000Z

149

Indicator system for advanced nuclear plant control complex  

DOE Patents (OSTI)

An advanced control room complex for a nuclear power plant, including a discrete indicator and alarm system (72) which is nuclear qualified for rapid response to changes in plant parameters and a component control system (64) which together provide a discrete monitoring and control capability at a panel (14-22, 26, 28) in the control room (10). A separate data processing system (70), which need not be nuclear qualified, provides integrated and overview information to the control room and to each panel, through CRTs (84) and a large, overhead integrated process status overview board (24). The discrete indicator and alarm system (72) and the data processing system (70) receive inputs from common plant sensors and validate the sensor outputs to arrive at a representative value of the parameter for use by the operator during both normal and accident conditions, thereby avoiding the need for him to assimilate data from each sensor individually. The integrated process status board (24) is at the apex of an information hierarchy that extends through four levels and provides access at each panel to the full display hierarchy. The control room panels are preferably of a modular construction, permitting the definition of inputs and outputs, the man machine interface, and the plant specific algorithms, to proceed in parallel with the fabrication of the panels, the installation of the equipment and the generic testing thereof.

Scarola, Kenneth (Windsor, CT); Jamison, David S. (Windsor, CT); Manazir, Richard M. (North Canton, CT); Rescorl, Robert L. (Vernon, CT); Harmon, Daryl L. (Enfield, CT)

1993-01-01T23:59:59.000Z

150

Refurbishment program of HANARO control computer system  

SciTech Connect

HANARO, an open-tank-in-pool type research reactor with 30 MW thermal power, achieved its first criticality in 1995. The programmable controller system MLC (Multi Loop Controller) manufactured by MOORE has been used to control and regulate HANARO since 1995. We made a plan to replace the control computer because the system supplier no longer provided technical support and thus no spare parts were available. Aged and obsolete equipment and the shortage of spare parts supply could have caused great problems. The first consideration for a replacement of the control computer dates back to 2007. The supplier did not produce the components of MLC so that this system would no longer be guaranteed. We established the upgrade and refurbishment program in 2009 so as to keep HANARO up to date in terms of safety. We designed the new control computer system that would replace MLC. The new computer system is HCCS (HANARO Control Computer System). The refurbishing activity is in progress and will finish in 2013. The goal of the refurbishment program is a functional replacement of the reactor control system in consideration of suitable interfaces, compliance with no special outage for installation and commissioning, and no change of the well-proved operation philosophy. HCCS is a DCS (Discrete Control System) using PLC manufactured by RTP. To enhance the reliability, we adapt a triple processor system, double I/O system and hot swapping function. This paper describes the refurbishment program of the HANARO control system including the design requirements of HCCS. (authors)

Kim, H. K.; Choe, Y. S.; Lee, M. W.; Doo, S. K.; Jung, H. S. [Korea Atomic Energy Research Inst., 989-111 Daedeok-daero, Yuseong, Daejeon, 305-353 (Korea, Republic of)

2012-07-01T23:59:59.000Z

151

AUTONOMOUS CONTROL SYSTEMS: ARCHITECTURE AND FUNDAMENTAL ISSUES  

E-Print Network (OSTI)

WP7 2:00 AUTONOMOUS CONTROL SYSTEMS: ARCHITECTURE AND FUNDAMENTAL ISSUES PJ. Antsaklis, KLM PassinD Dqt ofEecuical an Cmnpua Enge Univasity ofNotr Due Notr Dame, IN14655 ABSTRACT Autonomous control Autonomous control systems must perform well under signifit uncertainties in te plant and the envionment

Antsaklis, Panos

152

Analysis of the added value of the Access Control Metamodel for Web Service-Oriented Architecture by Presenting it in Business Rules.  

E-Print Network (OSTI)

??In this thesis, the added value of the "Access Control Metamodel for Web Service-Oriented Architecture" by Emig et al. is analyzed. This model is a… (more)

Roelands, R.P.

2011-01-01T23:59:59.000Z

153

Linearity and CNR Improvement Technologies against Optical Reflection inFiber-Oriented Wireless Access Systems  

Science Journals Connector (OSTI)

It is important to consider optical reflection conditions when designing fiber-oriented wireless access systems around subcarrier optical transmission since the noise characteristic can be significantly degraded by optical reflection, especially ... Keywords: intensity noise, optical reflection, predistorter, subcarrier optical transmission, superimposed subcarrier modulation, superluminescent diode

Yuji Aburakawa; Hiroyuki Ohtsuka

2000-11-01T23:59:59.000Z

154

EA-1980: Spar Canyon-Round Valley Access Road System Improvements, Custer County, Idaho  

Energy.gov (U.S. Department of Energy (DOE))

Bonneville Power Administration is preparing an EA to assess potential environmental impacts of proposed improvements to the access road system for its existing Spar Canyon-Round Valley Transmission Line located on Bureau of Land Management land in Custer County, Idaho.

155

DOWNHOLE VIBRATION MONITORING & CONTROL SYSTEM  

SciTech Connect

The objective of this program is to develop a system to both monitor the vibration of a bottomhole assembly, and to adjust the properties of an active damper in response to these measured vibrations. Phase I of this program, which entailed modeling and design of the necessary subsystems and design, manufacture and test of a full laboratory prototype, was completed on May 31, 2004. The principal objectives of Phase II are: more extensive laboratory testing, including the evaluation of different feedback algorithms for control of the damper; design and manufacture of a field prototype system; and, testing of the field prototype in drilling laboratories and test wells. As a result of the lower than expected performance of the MR damper noted last quarter, several additional tests were conducted. These dealt with possible causes of the lack of dynamic range observed in the testing: additional damping from the oil in the Belleville springs; changes in properties of the MR fluid; and, residual magnetization of the valve components. Of these, only the last was found to be significant. By using a laboratory demagnetization apparatus between runs, a dynamic range of 10:1 was achieved for the damper, more than adequate to produce the needed improvements in drilling. Additional modeling was also performed to identify a method of increasing the magnetic field in the damper. As a result of the above, several changes were made in the design. Additional circuitry was added to demagnetize the valve as the field is lowered. The valve was located to above the Belleville springs to reduce the load placed upon it and offer a greater range of materials for its construction. In addition, to further increase the field strength, the coils were relocated from the mandrel to the outer housing. At the end of the quarter, the redesign was complete and new parts were on order. The project is approximately three months behind schedule at this time.

Martin E. Cobern

2005-04-27T23:59:59.000Z

156

A Critique of the ANSI Standard on Role Based Access Control Ninghui Li Ji-Won Byun Elisa Bertino  

E-Print Network (OSTI)

standard has gone through several rounds of open public review. An initial draft of the standard [7 Standard ANSI INCITS 359-2004. Plans are underway to improve the standard and move the standard to ISOA Critique of the ANSI Standard on Role Based Access Control Ninghui Li Ji-Won Byun Elisa Bertino

Li, Ninghui

157

A Systematic Approach to Static Access Control Franois Pottier 1 , Christian Skalka 2 , and Scott Smith 2  

E-Print Network (OSTI)

A Systematic Approach to Static Access Control François Pottier 1 , Christian Skalka 2 , and Scott Smith 2 1 INRIA Rocquencourt, Francois.Pottier@inria.fr 2 The Johns Hopkins University, {ces,scott François Pottier, Christian Skalka, and Scott Smith Our Framework This paper follows up on an initial

Skalka, Christian

158

telecommunications access  

Science Journals Connector (OSTI)

In a system, such as a computer or data processing system, access for data transmission between (a) main storage or internal memory and (b) channel-attached terminals or link-attached terminals via telecommunications

2001-01-01T23:59:59.000Z

159

A New Digital Lighting Control System  

NLE Websites -- All DOE Office Websites (Extended Search)

A New Digital Lighting Control System A New Digital Lighting Control System Speaker(s): Charles Knuffke Date: June 29, 2010 - 12:00pm Location: 90-3122 Seminar Host/Point of Contact: Francis Rubinstein When various Lighting Controls components are discussed, they're usually slotted into separate "silos" - Occupancy Sensors, Relay Panels, Dimming Controls, and Daylighting Controls. Trying to combine two or more of these into a single system usually requires a fair amount of technical expertise and often help from different manufacturers. Combine that with the need under LEED to get these systems commissioned, often without detailed sequence of operation information, and that helps to explains why many view Lighting Controls as overly complex. And try to integrate the Lighting Controls into a larger overall building management system so their

160

Safe controllers design for industrial automation systems  

Science Journals Connector (OSTI)

The design of safe industrial controllers is one of the most important domains related to Automation Systems research. To support it, synthesis and analysis techniques are available. Among the analysis techniques, two of the most important are Simulation ... Keywords: Formal verification, Industrial systems behaviour modelling, Real-time systems, Safe controllers, Simulation

José Machado; Eurico Seabra; José C. Campos; Filomena Soares; Celina P. Leão

2011-05-01T23:59:59.000Z

Note: This page contains sample records for the topic "access control system" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


161

Control system for fluid heated steam generator  

DOE Patents (OSTI)

A control system for controlling the location of the nucleate-boiling region in a fluid heated steam generator comprises means for measuring the temperature gradient (change in temperature per unit length) of the heating fluid along the steam generator; means for determining a control variable in accordance with a predetermined function of temperature gradients and for generating a control signal in response thereto; and means for adjusting the feedwater flow rate in accordance with the control signal.

Boland, J.F.; Koenig, J.F.

1984-05-29T23:59:59.000Z

162

Instrumentation, Control and Intelligent Systems  

NLE Websites -- All DOE Office Websites (Extended Search)

for any application that requires monitoring, control, and human interaction. External peer review and advisory committees made up of academic, R&D, and customer organizations...

163

Install an Automatic Blowdown-Control System  

Energy.gov (U.S. Department of Energy (DOE))

This steam tip sheet on installing automatic blowdown controls provide how-to advice for improving industrial steam systems using low-cost, proven practices and technologies.

164

CONTROL SYSTEM FOR SOLAR HEATING and COOLING  

E-Print Network (OSTI)

sensors and control valves used in our generalized experimental system. The experimental solarsensors are remotely located at critical (in terms of decision-making) locations in the solar

Dols, C.

2010-01-01T23:59:59.000Z

165

Laser Inertial Fusion Energy Control Systems  

SciTech Connect

A Laser Inertial Fusion Energy (LIFE) facility point design is being developed at LLNL to support an Inertial Confinement Fusion (ICF) based energy concept. This will build upon the technical foundation of the National Ignition Facility (NIF), the world's largest and most energetic laser system. NIF is designed to compress fusion targets to conditions required for thermonuclear burn. The LIFE control systems will have an architecture partitioned by sub-systems and distributed among over 1000's of front-end processors, embedded controllers and supervisory servers. LIFE's automated control subsystems will require interoperation between different languages and target architectures. Much of the control system will be embedded into the subsystem with well defined interface and performance requirements to the supervisory control layer. An automation framework will be used to orchestrate and automate start-up and shut-down as well as steady state operation. The LIFE control system will be a high parallel segmented architecture. For example, the laser system consists of 384 identical laser beamlines in a 'box'. The control system will mirror this architectural replication for each beamline with straightforward high-level interface for control and status monitoring. Key technical challenges will be discussed such as the injected target tracking and laser pointing feedback. This talk discusses the the plan for controls and information systems to support LIFE.

Marshall, C; Carey, R; Demaret, R; Edwards, O; Lagin, L; Van Arsdall, P

2011-03-18T23:59:59.000Z

166

Wind Power System Simulation of Switch Control  

Science Journals Connector (OSTI)

In order to find a balance between energy efficiency and reliability of wind power generation system, this paper presents a ... switch control strategy. This paper establishes a wind power system simulation model...

Yuehua Huang; Guangxu Li; Huanhuan Li

2014-01-01T23:59:59.000Z

167

Multiple Coaxial Catheter System for Reliable Access in Interventional Stroke Therapy  

SciTech Connect

In some patients with acute cerebral vessel occlusion, navigating mechanical thrombectomy systems is difficult due to tortuous anatomy of the aortic arch, carotid arteries, or vertebral arteries. Our purpose was to describe a multiple coaxial catheter system used for mechanical revascularization that helps navigation and manipulations in tortuous vessels. A triple or quadruple coaxial catheter system was built in 28 consecutive cases presenting with acute ischemic stroke. All cases were treated by mechanical thrombectomy with the Penumbra System. In cases of unsuccessful thrombo-aspiration, additional thrombolysis or angioplasty with stent placement was used for improving recanalization. The catheter system consisted of an outermost 8-Fr and an intermediate 6-Fr guiding catheter, containing the inner Penumbra reperfusion catheters. The largest, 4.1-Fr, reperfusion catheter was navigated over a Prowler Select Plus microcatheter. The catheter system provided access to reach the cerebral lesions and provided stability for the mechanically demanding manipulations of thromboaspiration and stent navigation in all cases. Apart from their mechanical role, the specific parts of the system could also provide access to different types of interventions, like carotid stenting through the 8-Fr guiding catheter and intracranial stenting and thrombolysis through the Prowler Select Plus microcatheter. In this series, there were no complications related to the catheter system. In conclusion, building up a triple or quadruple coaxial system proved to be safe and efficient in our experience for the mechanical thrombectomy treatment of acute ischemic stroke.

Kulcsar, Zsolt, E-mail: kulcsarzsolt22@gmail.com; Yilmaz, Hasan [Geneva University Hospital, Neurointerventional Division, Department of Clinical Neurosciences (Switzerland); Bonvin, Christophe [Geneva University Hospital, Neurology Division, Department of Clinical Neurosciences (Switzerland); Lovblad, Karl O. [Geneva University Hospital, Diagnostic Neuroradiology Division, Department of Radiology (Switzerland); Ruefenacht, Daniel A. [Geneva University Hospital, Neurointerventional Division, Department of Clinical Neurosciences (Switzerland)

2010-12-15T23:59:59.000Z

168

Using EPICS enabled industrial hardware for upgrading control systems  

SciTech Connect

Los Alamos National Laboratory has been working with National Instruments (NI) and Cosy lab to implement EPICS Input Output Controller (IOC) software that runs directly on NI CompactRIO Real Time Controller (RTC) and communicates with NI LabVIEW through a shared memory interface. In this presentation, we will discuss our current progress in upgrading the control system at the Los Alamos Neutron Science Centre (LANSCE) and what we have learned about integrating CompactRIO into large experimental physics facilities. We will also discuss the implications of using Channel Access Server for LabVIEW which will enable more commercial hardware platforms to be used in upgrading existing facilities or in commissioning new ones.

Bjorkland, Eric A [Los Alamos National Laboratory; Veeramani, Arun [NATIONAL INSTRUMENTS; Debelle, Thierry [NATIONAL INSTRUMENTS

2009-01-01T23:59:59.000Z

169

A Systems Integration Approach To Lighting Control Systems  

E-Print Network (OSTI)

and office placement with control tools to harvest natural light. Other technologies under development seek to achieve the seamless integration of lighting controls with other building systems. Here, the rewards can be rich, with increased energy savings...

Lynch, S.; Renner, R. A.

2000-01-01T23:59:59.000Z

170

Modeling Control Mechanisms with Normative Multiagent Systems  

E-Print Network (OSTI)

. This paper is about control mechanisms for virtual organizations. As a case study, we discuss the Renewables of renewable energy. We apply a conceptual model based on normative multiagent systems (NMAS). We proposeModeling Control Mechanisms with Normative Multiagent Systems: the Case of the Renewables

van der Torre, Leon

171

Boiler Combustion Control and Monitoring System  

Energy.gov (U.S. Department of Energy (DOE))

Efficiency of existing boilers can be improved in three ways; replacement with new boilers, replacement of the burner, or installation of a combustion control system. While installation of a new boiler or replacement of the burner can lead to the greatest efficiency gains, the higher costs associated with these measures typically leads to longer payback periods than combustion control systems.

172

Modeling of Lean Exhaust Emissions Control Systems | Department...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Lean Exhaust Emissions Control Systems Modeling of Lean Exhaust Emissions Control Systems 2002 DEER Conference Presentation: National Renewable Energy Laboratory...

173

A Complex Multitasked Data Acquisition and Control System for Measuring  

NLE Websites -- All DOE Office Websites (Extended Search)

Complex Multitasked Data Acquisition and Control System for Measuring Complex Multitasked Data Acquisition and Control System for Measuring Window Thermal Efficiency, or How TSX+ Saved Our Project When It Outgrew RT-11 Title A Complex Multitasked Data Acquisition and Control System for Measuring Window Thermal Efficiency, or How TSX+ Saved Our Project When It Outgrew RT-11 Publication Type Conference Paper LBNL Report Number LBL-30613 Year of Publication 1991 Authors Yazdanian, Mehry, J. Randy Michelson, and Guy O. Kelley Conference Name U.S. DECUS Spring 1991 Symposium, May 6-10, 1991 Date Published 05/1991 Conference Location Atlanta, GA Other Numbers Mo-282 Abstract The Mobile Window Thermal Test facility (MoWiTT) predicts the energy efficiency of windows by continuously measuring the net heat transfer into and out of two room-sized calorimeters. The system consists of a data acquisition/control unit which communicates through a General Purpose Interface bus (GPIB IEEE-488) with an LSI-11/23 computer. We wrote the software in FORTRAN 77 and run it under TSX+ using detached jobs, the message facility, and shared run time systems to execute nine 64KB jobs which simultaneously take data and store it on disk. We arbitrate the access to a single scanner on the GPIB by running a SERVER task which acts as a virtual machine to serialize the requests. We can control and monitor the system remotely and run a number of interactive jobs without interfering with the data collection tasks. We cover a description of the hardware; the software requirements, including the libraries to control the data collection and drive the hardware; the system architecture, including a block diagram; design considerations to meet real-world requirements; and the problems we discovered along the way and the solutions we found either to correct or to bypass them.

174

Prerequisites: Control Systems I+II, System Modeling, Engine Class (Introduction to Modeling and Control of  

E-Print Network (OSTI)

Thesis IDSC-LG-FZ-05 Gas Diesel Engine Modeling and Control The gas diesel engine is a natural gas enginePrerequisites: Control Systems I+II, System Modeling, Engine Class (Introduction to Modeling and Control of Internal Combustion Engine Systems, IC Engines, ...), Optimization Course, Matlab

Lygeros, John

175

Coordinated Control of HVAC Systems  

E-Print Network (OSTI)

This paper describes the development of new control logic for starting and stopping energy-intensive equipment in buildings such as staged air-conditioning units. The concept is to use pulse-width modulation (PWM) instead of level-crossing logic. A...

Federspiel, C.; Lanning, S. D.; Li, H.; Auslander, D. M.

2001-01-01T23:59:59.000Z

176

Robust adaptive control of HVDC systems  

SciTech Connect

The transient performance of an HVDC power system is highly dependent on the parameters of the current/voltage regulators of the converter controls. In order to better accommodate changes in system structure or dc operating conditions, this paper introduces a new adaptive control strategy. The advantages of automatic tuning for continuous fine tuning are combined with predetermined gain scheduling in order to achieve robustness for large disturbances. Examples are provided for a digitally simulated back-to-back dc system.

Reeve, J.; Sultan, M. (Univ. of Waterloo, Ontario (Canada))

1994-07-01T23:59:59.000Z

177

Quantity comparison of concurrency control methods for XML database systems based on DOM API  

Science Journals Connector (OSTI)

Existing works on processing of eXtensible Markup Language (XML) documents have been concentrated on query optimisation, storage problems, documents transformation, compressing methods and normalisation. There are only few papers on concurrency control in accessing and modifying XML documents, which are stored in XML database systems. The aim of this paper is to analyse and compare the quantity of concurrency control methods for XML database systems based on DOM API.

Krzysztof Jankiewicz; Aleksandra Siekierska; Maciej Siekierski

2008-01-01T23:59:59.000Z

178

Ambient Control Systems | Open Energy Information  

Open Energy Info (EERE)

Control Systems Control Systems Jump to: navigation, search Logo: Ambient Control Systems Name Ambient Control Systems Address 1810 Gillespie Way Place El Cajon, California Zip 92020 Sector Solar Product Solar energy device with a computerized energy management Website http://www.ambientalert.com/ma Coordinates 32.8193566°, -116.981232° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":32.8193566,"lon":-116.981232,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

179

Feedwater temperature control methods and systems  

DOE Patents (OSTI)

A system for controlling the power level of a natural circulation boiling water nuclear reactor (NCBWR) is disclosed. The system, in accordance with an example embodiment of the present invention, may include a controller configured to control a power output level of the NCBWR by controlling a heating subsystem to adjust a temperature of feedwater flowing into an annulus of the NCBWR. The heating subsystem may include a steam diversion line configured to receive steam generated by a core of the NCBWR and a steam bypass valve configured to receive commands from the controller to control a flow of the steam in the steam diversion line, wherein the steam received by the steam diversion line has not passed through a turbine. Additional embodiments of the invention may include a feedwater bypass valve for controlling an amount of flow of the feedwater through a heater bypass line to the annulus.

Moen, Stephan Craig; Noonan, Jack Patrick; Saha, Pradip

2014-04-22T23:59:59.000Z

180

Building systems optimization controls calibration  

SciTech Connect

During the period between May 9, 1994 and June 2, 1994, Engineered Facility Management (EFM) conducted a comprehensive investigation into the condition and operation of the equipment and systems at a major high-rise building owned by a large California bank. The goal of the project was to improve the project`s energy cost per square foot without major system retrofit and capital expenditure. This report is a compilation of the findings, actions taken and recommendations.

NONE

1995-02-01T23:59:59.000Z

Note: This page contains sample records for the topic "access control system" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


181

Security Requirements for Remote Access to DOE and Applicable Contractor Information Technology Systems  

Directives, Delegations, and Requirements

The Notice establishes DOE policy requirements and responsibilities for remote connections to DOE and contractor information technology systems. The Notice will also ensure compliance with the requirements of DOE O 205.1, Department of Energy Cyber Security Management Program, dated 3-21-03, to protect DOE information and information technology systems commensurate with the risk and magnitude of harm that could result from their unauthorized access, use, disclosure, modification or destruction. DOE N 205.15, dated 3/18/05, extends this directive until 3/18/06. No cancellations.

2004-02-19T23:59:59.000Z

182

An intelligent CNC machine control system architecture  

SciTech Connect

Intelligent, agile manufacturing relies on automated programming of digitally controlled processes. Currently, processes such as Computer Numerically Controlled (CNC) machining are difficult to automate because of highly restrictive controllers and poor software environments. It is also difficult to utilize sensors and process models for adaptive control, or to integrate machining processes with other tasks within a factory floor setting. As part of a Laboratory Directed Research and Development (LDRD) program, a CNC machine control system architecture based on object-oriented design and graphical programming has been developed to address some of these problems and to demonstrate automated agile machining applications using platform-independent software.

Miller, D.J.; Loucks, C.S.

1996-10-01T23:59:59.000Z

183

LNG fire and vapor control system technologies  

SciTech Connect

This report provides a review of fire and vapor control practices used in the liquefied natural gas (LNG) industry. Specific objectives of this effort were to summarize the state-of-the-art of LNG fire and vapor control; define representative LNG facilities and their associated fire and vapor control systems; and develop an approach for a quantitative effectiveness evaluation of LNG fire and vapor control systems. In this report a brief summary of LNG physical properties is given. This is followed by a discussion of basic fire and vapor control design philosophy and detailed reviews of fire and vapor control practices. The operating characteristics and typical applications and application limitations of leak detectors, fire detectors, dikes, coatings, closed circuit television, communication systems, dry chemicals, water, high expansion foam, carbon dioxide and halogenated hydrocarbons are described. Summary descriptions of a representative LNG peakshaving facility and import terminal are included in this report together with typical fire and vapor control systems and their locations in these types of facilities. This state-of-the-art review identifies large differences in the application of fire and vapor control systems throughout the LNG industry.

Konzek, G.J.; Yasutake, K.M.; Franklin, A.L.

1982-06-01T23:59:59.000Z

184

Underground ventilation remote monitoring and control system  

SciTech Connect

This paper presents the design and installation of an underground ventilation remote monitoring and control system at the Waste Isolation Pilot Plant. This facility is designed to demonstrate safe underground disposal of U.S. defense generated transuranic nuclear waste. To improve the operability of the ventilation system, an underground remote monitoring and control system was designed and installed. The system consists of 15 air velocity sensors and 8 differential pressure sensors strategically located throughout the underground facility providing real-time data regarding the status of the ventilation system. In addition, a control system was installed on the main underground air regulators. The regulator control system gives indication of the regulator position and can be controlled either locally or remotely. The sensor output is displayed locally and at a central surface location through the site-wide Central Monitoring System (CMS). The CMS operator can review all sensor data and can remotely operate the main underground regulators. Furthermore, the Virtual Address Extension (VAX) network allows the ventilation engineer to retrieve real-time ventilation data on his personal computer located in his workstation. This paper describes the types of sensors selected, the installation of the instrumentation, and the initial operation of the remote monitoring system.

Strever, M.T.; Wallace, K.G. Jr.; McDaniel, K.H.

1995-12-31T23:59:59.000Z

185

Spatial xenon oscillation control with expert systems  

SciTech Connect

Spatial power oscillations were attributed to the xenon transients in a reactor core in 1958 by Randall and St. John. These transients are usually initiated by a local reactivity insertion and lead to divergent axial flux oscillations in the core at constant power. Several heuristic manual control strategies and automatic control methods were developed to damp the xenon oscillations at constant power operations. However, after the load-follow operation of the reactors became a necessity of life, a need for better control strategies arose. Even though various advanced control strategies were applied to solve the xenon oscillation control problem for the load-follow operation, the complexity of the system created difficulties in modeling. The strong nonlinearity of the problem requires highly sophisticated analytical approaches that are quite inept for numerical solutions. On the other hand, the complexity of a system and heuristic nature of the solutions are the basic reasons for using artificial intelligence techniques such as expert systems.

Alten, S. (Turkish Atomic Energy Authority, Ankara (Turkey)); Danofsky, R.A. (Iowa State Univ., Ames, IA (United States))

1993-01-01T23:59:59.000Z

186

Moving mass trim control system design  

SciTech Connect

This paper describes the design of a moving mass trim control system for maneuvering axisymmetric reentry vehicles. The moving mass trim controller is composed of three equal masses that are independently positioned in order to deliver a desired center of mass position. For a slowly spinning reentry vehicle, the mass offset creates a trim angle-of-attack to generate modest flight path corrections. The control system must maintain the desired position of each mass in the face of large disturbances. A novel algorithm for determining the desired mass positions is developed in conjunction with a preliminary controller design. The controller design is based on classical frequency domain techniques where a bound on the disturbance magnitude is used to formulate the disturbance rejection problem. Simulation results for the controller are presented for a typical reentry vehicle.

Byrne, R.H.; Robinett, R.D.; Sturgis, B.R.

1996-03-01T23:59:59.000Z

187

Variable emissivity laser thermal control system  

DOE Patents (OSTI)

A laser thermal control system for a metal vapor laser maintains the wall mperature of the laser at a desired level by changing the effective emissivity of the water cooling jacket. This capability increases the overall efficiency of the laser.

Milner, Joseph R. (Livermore, CA)

1994-01-01T23:59:59.000Z

188

Artificial Immune System based urban traffic control  

E-Print Network (OSTI)

Borrowing ideas from natural immunity, Artificial Immune Systems (AIS) offer a novel approach to solving many diagnosis, optimization and control problems. In the course of this research this paradigm was applied to the problem of optimizing urban...

Negi, Pallav

2007-09-17T23:59:59.000Z

189

CONTROL SYSTEM FOR SOLAR HEATING and COOLING  

E-Print Network (OSTI)

Solar Energy Society Meeting, Los Angeles, California, Julysolar in- solation measuring stations in northern and central California (California 94720 August 1975 A control system is being developed that will be capable of operating solar

Dols, C.

2010-01-01T23:59:59.000Z

190

A Robust Model Control for Dynamic Systems  

Science Journals Connector (OSTI)

Analytical methods of polynomial algebra, heuristic techniques, and digital modeling are used to study the robustness domain of linear dynamic systems with model “input–output” controllers as a function of the mutual locations of zeros ...

S. V. Tararykin; V. V. Tyutikov

2002-05-01T23:59:59.000Z

191

DOE and Industry Showcase New Control Systems Security Technologies...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Technology Development Energy Delivery Systems Cybersecurity Control Systems Security News Archive DOE and Industry Showcase New Control Systems Security Technologies at...

192

Software Quality Assurance Control of Existing Systems | Department...  

Office of Environmental Management (EM)

Software Quality Assurance Control of Existing Systems Software Quality Assurance Control of Existing Systems Existing software systems often represent significant investments and...

193

JFE Electrical and Control Systems | Open Energy Information  

Open Energy Info (EERE)

Systems Jump to: navigation, search Name: JFE Electrical and Control Systems Place: Japan Product: Electronic power, automation and control systems maker which also makes PV...

194

E-Print Network 3.0 - access appointment system Sample Search...  

NLE Websites -- All DOE Office Websites (Extended Search)

are due will not have access to submit grades. A courtesy appointment... To access the "Enter Mass Appointments" ... Source: McQuade, D. Tyler - Department of Chemistry and...

195

JBluIce-EPICS control system for macromolecular crystallography.  

SciTech Connect

The trio of macromolecular crystallography beamlines constructed by the General Medicine and Cancer Institutes Collaborative Access Team (GM/CA-CAT) in Sector 23 of the Advanced Photon Source (APS) have been in growing demand owing to their outstanding beam quality and capacity to measure data from crystals of only a few micrometres in size. To take full advantage of the state-of-the-art mechanical and optical design of these beamlines, a significant effort has been devoted to designing fast, convenient, intuitive and robust beamline controls that could easily accommodate new beamline developments. The GM/CA-CAT beamline controls are based on the power of EPICS for distributed hardware control, the rich Java graphical user interface of Eclipse RCP and the task-oriented philosophy as well as the look and feel of the successful SSRL BluIce graphical user interface for crystallography. These beamline controls feature a minimum number of software layers, the wide use of plug-ins that can be written in any language and unified motion controls that allow on-the-fly scanning and optimization of any beamline component. This paper describes the ways in which BluIce was combined with EPICS and converted into the Java-based JBluIce, discusses the solutions aimed at streamlining and speeding up operations and gives an overview of the tools that are provided by this new open-source control system for facilitating crystallographic experiments, especially in the field of microcrystallography.

Stepanov, S.; Makarov, O.; Hilgart, M.; Pothineni, S.; Urakhchin, A.; Devarapalli, S.; Yoder, D.; Becker, M.; Ogata, C.; Sanishvili, R.; Nagarajan, V.; Smith, J. L.; Fischetti, R. F. (Biosciences Division); (Univ. of Michigan)

2011-01-01T23:59:59.000Z

196

NSTX Synchronization System Block Diagram Control Room  

E-Print Network (OSTI)

NSTX Synchronization System Block Diagram Clock Rack Control Room Junction Area MG FCPCRF Cage Test Cell West Patch Rack Test Cell East Patch Rack Darm Patch Rack CAMAC Crate CAMAC Crate CAMAC Crate' Level, and RF Balcony O 1,230 ft. 1.88 µsec Optic Rack 100 Control Room E 100 ft. .15µsec O 525 ft. .8

Princeton Plasma Physics Laboratory

197

Adaptive excitation control in power systems  

E-Print Network (OSTI)

control input pu? and output gE? , we have puBxAx ?+?=? ? (2.25) xig ? (2.26) where ?? ? ?? ? ?== 6667 2 rJA , ?? ? ?? ?= 67 0 iB , [ ]08213.1=C 32....38) or puBxAx ?+?=? ? (2.39) xip ? (2.40) where p is a measurable output and iii C are uncertain system parameters. In the Chapter IV, we apply our adaptive control approaches to the real DAE system. We...

Chiu, Pei-Chen

2006-08-16T23:59:59.000Z

198

Extremal properties of interval control systems  

E-Print Network (OSTI)

EXTREMAL PROPERTIES OF INTERVAL CONTROL SYSTEMS A Thesis by FARIS RAGHEB KAMAL Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE May 1991 Major... Subject: Electrical Engineering EXTREMAL PROPERTIES OF INTERVAL CONTROL SYSTEMS A Thesis by FARIS RAGHEB I&AMAL Approved as to style and content b1 Mohammed A. Dahleh (Chair of Committee) ostas Georghiades (Member ) Ehsani Mehrdad (Member...

Kamal, Faris Ragheb

2012-06-07T23:59:59.000Z

199

Phantom Access Agent: a Client-Side Approach to Personal Information Control  

E-Print Network (OSTI)

Agent (PAA - http://www.scs.cs.nyu.edu/paa/), a lightweight application designed to conceal personal information from online services that require registration as a condition of access. PAA enables users to share or not share personal information, PAA runs on users' local computers, avoiding dependency

Nissenbaum, Helen

200

LED lamp color control system and method  

SciTech Connect

An LED lamp color control system and method including an LED lamp having an LED controller 58; and a plurality of LED channels 60 operably connected to the LED controller 58, each of the plurality of LED channels 60 having a channel switch 62 in series with at least one shunted LED circuit 83, the shunted LED circuit 83 having a shunt switch 68 in parallel with an LED source 80. The LED controller 58 determines whether the LED source 80 is in a feedback controllable range, stores measured optical flux for the LED source 80 when the LED source 80 is in the feedback controllable range, and bypasses storing the measured optical flux when the LED source 80 is not in the feedback controllable range.

Gaines, James; Clauberg, Bernd; Van Erp, Josephus A.M.

2013-02-05T23:59:59.000Z

Note: This page contains sample records for the topic "access control system" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


201

Secure control systems with application to cyber-physical systems  

SciTech Connect

Control systems are computer-based systems with networked units consisting of sensors, actuators, control processing units, and communication devices. The role of control system is to interact, monitor, and control physical processes. Reactive power control is a fundamental issue in ensuring the security of the power network. It is claimed that Synchronous Condensers (SC) have been used at both distribution and transmission voltage levels to improve stability and to maintain voltages within desired limits under changing load conditions and contingency situations. Performance of PI controller corresponding to various tripping faults are analyzed for SC systems. Most of the eort in protecting these systems has been in protection against random failures or reliability. However, besides failures these systems are subject to various signal attacks for which new analysis are discussed here. When a breach does occur, it is necessary to react in a time commensurate with the physical dynamics of the system as it responds to the attack. Failure to act swiftly enough may result in undesirable, and possibly irreversible, physical eects. Therefore, it is meaningful to evaluate the security of a cyber-physical system, especially to protect it from cyber-attack. Illustrative numerical examples are provided together with an application to the SC systems.

Dong, Jin [ORNL] [ORNL; Djouadi, Seddik M [ORNL] [ORNL; Nutaro, James J [ORNL] [ORNL; Kuruganti, Phani Teja [ORNL] [ORNL

2014-01-01T23:59:59.000Z

202

Stability analysis and controller synthesis for hybrid dynamical systems  

Science Journals Connector (OSTI)

...Yovine1995The algorithmic analysis of hybrid systemsTheoret...systemsHybrid systems:computation...controlLecture Notes in Computer Science, no...systemsHybrid systems:computation...controlLecture Notes in Computer Science, no...systemsIEEE Control Systems Mag. 28 3673...Iung2002Stability analysis and control synthesis...

2010-01-01T23:59:59.000Z

203

Security Controls for Unclassified Information Systems Manual  

Directives, Delegations, and Requirements

The Manual establishes minimum implementation standards for cyber security technical, management, and operational controls that will be followed in all information systems operated by DOE and the information systems. Does not cancel other directives. Canceled by DOE O 205.1B

2009-01-05T23:59:59.000Z

204

Security Controls for Unclassified Information Systems Manual  

Directives, Delegations, and Requirements

The Manual establishes minimum implementation standards for cyber security technical, management, and operational controls that will be followed in all information systems operated by DOE and the information systems. Admin Chg 1 dated 9-1-09; Admin Chg 2 dated 12-22-09. Canceled by DOE O 205.1B.

2009-01-05T23:59:59.000Z

205

Security Controls for Unclassified Information Systems Manual  

Directives, Delegations, and Requirements

The Manual establishes minimum implementation standards for cyber security technical, management, and operational controls that will be followed in all information systems operated by DOE and the information systems. Admin Chg 1 dated 9-1-09. Canceled by DOE O 205.1B.

2009-01-05T23:59:59.000Z

206

Waste receiving and processing plant control system; system design description  

SciTech Connect

The Plant Control System (PCS) is a heterogeneous computer system composed of numerous sub-systems. The PCS represents every major computer system that is used to support operation of the Waste Receiving and Processing (WRAP) facility. This document, the System Design Description (PCS SDD), includes several chapters and appendices. Each chapter is devoted to a separate PCS sub-system. Typically, each chapter includes an overview description of the system, a list of associated documents related to operation of that system, and a detailed description of relevant system features. Each appendice provides configuration information for selected PCS sub-systems. The appendices are designed as separate sections to assist in maintaining this document due to frequent changes in system configurations. This document is intended to serve as the primary reference for configuration of PCS computer systems. The use of this document is further described in the WRAP System Configuration Management Plan, WMH-350, Section 4.1.

LANE, M.P.

1999-02-24T23:59:59.000Z

207

Distributed computer controls for accelerator systems  

SciTech Connect

A distributed control system has been designed and installed at the Lawrence Livermore National Laboratory Multi-user Tandem Facility using an extremely modular approach in hardware and software. The two tiered, geographically organized design allowed total system implementation with four months with a computer and instrumentation cost of approximately $100K. Since the system structure is modular, application to a variety of facilities is possible. Such a system allows rethinking and operational style of the facilities, making possible highly reproducible and unattended operation. The impact of industry standards, i.e., UNIX, CAMAC, and IEEE-802.3, and the use of a graphics-oriented controls software suite allowed the efficient implementation of the system. The definition, design, implementation, operation and total system performance will be discussed. 3 refs.

Moore, T.L.

1988-09-01T23:59:59.000Z

208

Quadrotors Formation Control: A Wireless Medium Access Aware Jose Alfredo Guerrero and Pedro Castillo and Yacine Challal  

E-Print Network (OSTI)

experimental tests have been carried out to control the yaw angle of two quadrotors. I. INTRODUCTION Small. The distributed nature of multiple robot control system over wireless networks represent an interesting research as well as packet delay in a multi-agent aerial system considering a wireless network. For this end, we

Paris-Sud XI, Université de

209

NATIONAL GEOTHERMAL DATA SYSTEM: AN EXEMPLAR OF OPEN ACCESS TO DATA  

SciTech Connect

The formal launch of National Geothermal Data System (NGDS – www.geothermaldata.org) in 2014 will provide open access to technical geothermal-relevant data from all of the Department of Energy- sponsored geothermal development and research projects and geologic data from all 50 states. By making data easily discoverable and accessible this system will open new exploration opportunities and shorten project development. The prototype data system currently includes multiple data nodes, and nationwide data online and available to the public, indexed through a single catalog under construction at http://search.geothermaldata.org. Data from state geological surveys and partners includes more than 5 million records online, including 1.48 million well headers (oil and gas, water, geothermal), 732,000 well logs, and 314,000 borehole temperatures and is growing rapidly. There are over 250 Web services and another 138 WMS (Web Map Services) registered in the system as of August, 2013. Additional data record is being added by companion projects run by Boise State University, Southern Methodist University, and the USGS. The National Renewable Energy Laboratory is managing the Geothermal Data Repository, an NGDS node that will be a clearinghouse for data from hundreds of DOE-funded geothermal projects. NGDS is built on the US Geoscience Information Network (USGIN) data integration framework, which is a joint undertaking of the USGS and the Association of American State Geologists (AASG). NGDS is fully compliant with the White House Executive Order of May 2013, requiring all federal agencies to make their data holdings publicly accessible online in open source, interoperable formats with common core and extensible metadata. The National Geothermal Data System is being designed, built, deployed, and populated primarily with grants from the US Department of Energy, Geothermal Technologies Office. To keep this operational system sustainable after the original implementation will require four core elements: continued serving of data and applications by providers; maintenance of system operations; a governance structure; and an effective business model. Each of these presents a number of challenges currently under consideration.

Blackman, Harold [Arizona Geological Survey; Blackman, Harold M. [Arizona Geological Survey; Blackman, Harold M. [Arizona Geological Survey; Blackman, Harold [Boise State University; Blackman, Harold [United States Department of Energy; Blackman, Harold

2013-10-01T23:59:59.000Z

210

System Optimization - The Global Approach to HVAC Control  

E-Print Network (OSTI)

System Optimization is a new approach to HVAC control as implemented by Energy Management Control Systems. System Optimization is defined as electronic building control strategies which treat a building's HVAC components as a complete energy...

Thielman, D. E.

1984-01-01T23:59:59.000Z

211

Building HVAC Control System Interaction Issues: Two Case Studies  

E-Print Network (OSTI)

Direct Digital Control (DDC) allows HVAC equipment to be controlled at an upper level (supervisory control) through commands from a central system, or at a lower-level (local-loop control) by local controllers. The various levels of equipment...

Chen, Q.; Deng, S.; Toole, C.; Xu, C.

2007-01-01T23:59:59.000Z

212

Output Feedback Control and Optimal Bandwidth Allocation of Networked Control Systems  

E-Print Network (OSTI)

A networked control system (NCS) is a control system where sensors, actuators, and controllers are interconnected over a communication network. This dissertation presents a framework for modeling, stability analysis, optimal control, and bandwidth...

Dong, Jiawei

2013-04-12T23:59:59.000Z

213

Design and application of an EPICS compatible slow plant system controller in J-TEXT tokamak  

Science Journals Connector (OSTI)

Abstract J-TEXT tokamak has recently implemented J-TEXT COntrol, Data Access and Communication (CODAC) system on the principle of ITER CODAC. The control network in J-TEXT CODAC system is based on Experimental Physics and Industrial Control System (EPICS). However, former slow plant system controllers in J-TEXT did not support EPICS. Therefore, J-TEXT has designed an EPICS compatible slow controller. And moreover, the slow controller also acts the role of Plant System Host (PSH), which helps non-EPICS controllers to keep working in J-TEXT CODAC system. The basic functionalities dealing with user defined tasks have been modularized into driver or plug-in modules, which are plug-and-play and configured with XML files according to specific control task. In this case, developers are able to implement various kinds of control tasks with these reusable modules, regardless of how the lower-lever functions are implemented, and mainly focusing on control algorithm. And it is possible to develop custom-built modules by themselves. This paper presents design of the slow controller. Some applications of the slow controller have been deployed in J-TEXT, and will be introduced in this paper.

J. Zhang; M. Zhang; W. Zheng; G. Zhuang; T. Ding

2014-01-01T23:59:59.000Z

214

Simplification of Diesel Emission Control System Packaging Using...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Simplification of Diesel Emission Control System Packaging Using SCR Coated on DPF Simplification of Diesel Emission Control System Packaging Using SCR Coated on DPF Study...

215

Common Cyber Security Vulnerabilities Observed in Control System...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Common Cyber Security Vulnerabilities Observed in Control System Assessments by the INL NSTB Program Common Cyber Security Vulnerabilities Observed in Control System Assessments by...

216

Advanced PHEV Engine Systems and Emissions Control Modeling and...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

PHEV Engine Systems and Emissions Control Modeling and Analysis Advanced PHEV Engine Systems and Emissions Control Modeling and Analysis 2011 DOE Hydrogen and Fuel Cells Program,...

217

National SCADA Test Bed - Enhancing control systems security...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

SCADA Test Bed - Enhancing control systems security in the energy sector (September 2009) National SCADA Test Bed - Enhancing control systems security in the energy sector...

218

Small- and Medium-Size Building Automation and Control System...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Small- and Medium-Size Building Automation and Control System Needs: Scoping Study Small- and Medium-Size Building Automation and Control System Needs: Scoping Study Emerging...

219

Control Systems Cyber Security: Defense in Depth Strategies ...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

that use control system networks while maintaining a multi-tier information architecture. Control Systems Cyber Security: Defense in Depth Strategies More Documents &...

220

Software Quality Assurance Control of Existing Systems  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

2.01.00 - 2002 2.01.00 - 2002 Software Quality Assurance Control of Existing Systems September 2002 United States Department of Energy Albuquerque Operations Office Abstract Existing software systems often represent significant investments and play important roles in the every day businesses of organizations. Many of these systems are experiencing support problems. To meet current and future operational needs, organizations need to plan how best to address these support issues. Some of the issues to consider are presented in this document with references to related standards for further detailed examination. Two tutorials, one based on software maintenance and another detailing a baseline recovery strategy are included. SQA Control of Existing Systems SQAS22.01.00-2002

Note: This page contains sample records for the topic "access control system" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


221

STATIC VAR COMPENSATOR CONTROL USING A QUANTIZED CONTROLLER FOR A TWO AREA MULTI-MACHINE SYSTEM  

E-Print Network (OSTI)

Compensators (SVC) control to enhance the damping of the power-swing. The test system used is a two area multiSTATIC VAR COMPENSATOR CONTROL USING A QUANTIZED CONTROLLER FOR A TWO AREA MULTI-MACHINE SYSTEM-machine system. A severe disturbance is introduced into the power system and the quantized controller controlled

Wilamowski, Bogdan Maciej

222

Control system for heliostats and method  

SciTech Connect

A control system and method for a heliostat or a system of heliostats which operates to maintain the sunbeam properly centered with respect to an associated tracking head and tracks the sun for proper elevational and azimuthal orientation of the heliostat. The tracking date is stored in memory and utilized to reset the heliostat at night for proper orientation during the next days tracking and/or for proper orientation during sunless periods of the day. Each heliostat is therefore self-tracking.

Gerwin, H. L.

1985-05-28T23:59:59.000Z

223

New System For Tokamak T-10 Experimental Data Acquisition, Data Handling And Remote Access  

SciTech Connect

For carrying out the experiments on nuclear fusion devices in the Institute of Nuclear Fusion, Moscow, a system for experimental data acquisition, data handling and remote access (further 'DAS-T10') was developed and has been used in the Institute since the year 2000. The DAS-T10 maintains the whole cycle of experimental data handling: from configuration of data measuring equipment and acquisition of raw data from the fusion device (the Device), to presentation of math-processed data and support of the experiment data archive. The DAS-T10 provides facilities for the researchers to access the data both at early stages of an experiment and well afterwards, locally from within the experiment network and remotely over the Internet.The DAS-T10 is undergoing a modernization since the year 2007. The new version of the DAS-T10 will accommodate to modern data measuring equipment and will implement improved architectural solutions. The innovations will allow the DAS-T10 to produce and handle larger amounts of experimental data, thus providing the opportunities to intensify and extend the fusion researches. The new features of the DAS-T10 along with the existing design principles are reviewed in this paper.

Sokolov, M. M.; Igonkina, G. B.; Koutcherenko, I. Yu.; Nurov, D. N. [Institute of Nuclear Fusion, Russian Research Center 'Kurchatov Institute', 1, Kurchatov Sq., Moscow (Russian Federation)

2008-04-07T23:59:59.000Z

224

A computer system for access to distributed genome mapping data. Progress report  

SciTech Connect

Development of a computer system for access to distributed genome mapping data is continuing. This effort is to develop software which accesses multiple databases and retrieves data which contain information useful for accelerating mapping human chromosomes. For example, the molecular sequence databases (GenBank, EMBL Data Library, PIR, SwissProt) which contain data required for the development of oligonucleotides for probing DNA as well as for extracting data for primer pair development for PCR-based methods. It is also to develop software which qualitatively integrates the following mapping data: (1) markers regionally localized using cytogenetic methods, (2) polymorphic markers ordered by genetic linkage analysis, (3) clones ordered by various ``finger-printing`` methods, (4) fragments ordered by long-range restriction mapping, (5) single genomic fragments or clones that have STSs assigned to them, (6) nucleotide sequences, (7) the associated metadata such as the submitting investigator`s name, location, etc; the source organism; the chromosome the element is from; the chromosomal location is whatever detail is available.

Marr, T.G.

1992-02-05T23:59:59.000Z

225

Method and system for controlled combustion engines  

DOE Patents (OSTI)

A system for controlling combustion in internal combustion engines of both the Diesel or Otto type, which relies on establishing fluid dynamic conditions and structures wherein fuel and air are entrained, mixed and caused to be ignited in the interior of a multiplicity of eddies, and where these structures are caused to sequentially fill the headspace of the cylinders.

Oppenheim, A. K. (Berkeley, CA)

1990-01-01T23:59:59.000Z

226

Oscillation control system for electric motor drive  

DOE Patents (OSTI)

A feedback system for controlling mechanical oscillations in the torsionally complaint drive train of an electric or other vehicle. Motor speed is converted in a processor to estimate state signals in which a plant model which are used to electronically modify thetorque commands applied to the motor.

Slicker, James M. (Union Lake, MI); Sereshteh, Ahmad (Union Lake, MI)

1988-01-01T23:59:59.000Z

227

Do hormonal control systems produce evolutionary inertia?  

Science Journals Connector (OSTI)

...A2006Neural crest cells and the community of plan for craniofacial development: historical...Rev. Ecol. Evol. 38, 793-817. Review. Do hormonal control systems produce evolutionary...Support, U.S. Gov't, Non-P.H.S. Review | 0 Gonadal Steroid Hormones | Animals...

2008-01-01T23:59:59.000Z

228

Distributed Timing and Triggering Control System  

SciTech Connect

This document is a slide show type presentation regarding the need and realization of a new control system for work at the Nevada National Security Site. Commercial products that met the need are identified, both hardware and software. Particular emphasis is on the Integrated Signal Programmer.

Bowen, T., Huerta, J. A.

2012-08-01T23:59:59.000Z

229

Simultaneous Authentication and Certification of Arms-Control Measurement Systems  

SciTech Connect

Most arms-control-treaty-monitoring scenarios involve a host party that makes a declaration regarding its nuclear material or items and a monitoring party that verifies that declaration. A verification system developed for such a use needs to be trusted by both parties. The first concern, primarily from the host party's point of view, is that any sensitive information that is collected must be protected without interfering in the efficient operation of the facility being monitored. This concern is addressed in what can be termed a 'certification' process. The second concern, of particular interest to the monitoring party, is that it must be possible to confirm the veracity of both the measurement system and the data produced by this measurement system. The monitoring party addresses these issues during an 'authentication' process. Addressing either one of these concerns independently is relatively straightforward. However, it is more difficult to simultaneously satisfy host party certification concerns and monitoring party authentication concerns. Typically, both parties will want the final access to the measurement system. We will describe an alternative approach that allows both parties to gain confidence simultaneously. This approach starts with (1) joint development of the measurement system followed by (2) host certification of several copies of the system and (3) random selection by the inspecting party of one copy to be use during the monitoring visit and one (or more) copy(s) to be returned to the inspecting party's facilities for (4) further hardware authentication; any remaining copies are stored under joint seal for use as spares. Following this process, the parties will jointly (5) perform functional testing on the selected measurement system and then (6) use this system during the monitoring visit. Steps (1) and (2) assure the host party as to the certification of whichever system is eventually used in the monitoring visit. Steps (1), (3), (4), and (5) increase the monitoring party's confidence in the authentication of the measurement system.

MacArthur, Duncan W. [Los Alamos National Laboratory; Hauck, Danielle K. [Los Alamos National Laboratory; Thron, Jonathan L. [Los Alamos National Laboratory

2012-07-09T23:59:59.000Z

230

Control of HVAC testbeds: remote access and software tools for cooperative research.  

E-Print Network (OSTI)

?? This thesis describes an object oriented programming software that implements a set of automatic controllers for the management-over-the-cloud of Heating, Venting and Air Conditioning… (more)

Montes Torns, Ferran

2013-01-01T23:59:59.000Z

231

Recommended Practice for Securing Control System Modems  

SciTech Connect

This paper addresses an often overlooked “backdoor” into critical infrastructure control systems created by modem connections. A modem’s connection to the public telephone system is similar to a corporate network connection to the Internet. By tracing typical attack paths into the system, this paper provides the reader with an analysis of the problem and then guides the reader through methods to evaluate existing modem security. Following the analysis, a series of methods for securing modems is provided. These methods are correlated to well-known networking security methods.

James R. Davidson; Jason L. Wright

2008-01-01T23:59:59.000Z

232

System and method for integrating and accessing multiple data sources within a data warehouse architecture  

DOE Patents (OSTI)

A system and method is disclosed for integrating and accessing multiple data sources within a data warehouse architecture. The metadata formed by the present method provide a way to declaratively present domain specific knowledge, obtained by analyzing data sources, in a consistent and useable way. Four types of information are represented by the metadata: abstract concepts, databases, transformations and mappings. A mediator generator automatically generates data management computer code based on the metadata. The resulting code defines a translation library and a mediator class. The translation library provides a data representation for domain specific knowledge represented in a data warehouse, including "get" and "set" methods for attributes that call transformation methods and derive a value of an attribute if it is missing. The mediator class defines methods that take "distinguished" high-level objects as input and traverse their data structures and enter information into the data warehouse.

Musick, Charles R. (Castro Valley, CA); Critchlow, Terence (Livermore, CA); Ganesh, Madhaven (San Jose, CA); Slezak, Tom (Livermore, CA); Fidelis, Krzysztof (Brentwood, CA)

2006-12-19T23:59:59.000Z

233

Virtual control system environment: A modeling and simulation tool for process control systems  

SciTech Connect

The development of tools and techniques for security testing and performance testing of Process Control Systems (PCS) is needed since those systems are vulnerable to the same classes of threats as other networked computer systems. In practice, security testing is difficult to perform on operational PCS because it introduces an unacceptable risk of disruption to the critical systems (e.g., power grids) that they control. In addition, the hardware used in PCS is often expensive, making full-scale mockup systems for live experiments impractical. A more flexible approach to these problems can be provided through test beds that provide the proper mix of real, emulated, and virtual elements to model large, complex systems such as critical infrastructures. This paper describes a 'Virtual Control System Environment' that addresses these issues. (authors)

Lee, E.; Michalski, J.; Sholander, P.; Van Leeuwen, B. [Sandia National Laboratories, Albuquerque, NM 87111 (United States)

2006-07-01T23:59:59.000Z

234

Control landscapes for open system quantum operations  

Science Journals Connector (OSTI)

The reliable realization of control operations is a key component of quantum information applications. In practice, meeting this goal is very demanding for open quantum systems. This paper investigates the landscape defined as the fidelity J between the desired and achieved quantum operations with an open system. The goal is to maximize J as a functional of the control variables. We specify the complete set of critical points of the landscape function in the so-called kinematic picture. An associated Hessian analysis of the landscape reveals that, upon the satisfaction of a particular controllability criterion, the critical topology is dependent on the particular environment, but no false traps (i.e. suboptimal solutions) exist. Thus, a gradient-type search algorithm should not be hindered in searching for the ultimate optimal solution with such controllable systems. Moreover, the maximal fidelity is proven to coincide with Uhlmann's fidelity between the environmental initial states associated with the achieved and desired quantum operations, which provides a generalization of Uhlmann's theorem in terms of Kraus maps.

Re-Bing Wu; Herschel Rabitz

2012-01-01T23:59:59.000Z

235

Management of Control System Information SecurityI: Control System Patch Management  

SciTech Connect

The use of information technologies in control systems poses additional potential threats due to the frequent disclosure of software vulnerabilities. The management of information security involves a series of policy-making on the vulnerability discovery, disclosure, patch development and patching. In this paper, we use a system approach to devise a model to understand the interdependencies of these decision processes. In more details, we establish a theoretical framework for making patching decision for control systems, taking into account the requirement of functionability of control systems. We illustrate our results with numerical simulations and show that the optimal operation period of control systems given the currently estimated attack rate is roughly around a half a month.

Quanyan Zhu; Miles McQueen; Craig Rieger; Tamer Basar

2011-09-01T23:59:59.000Z

236

Systems/Process Monitoring, Diagnostics and Control - Nuclear Engineering  

NLE Websites -- All DOE Office Websites (Extended Search)

Capabilities > Nuclear Systems Capabilities > Nuclear Systems Technologies > Systems/Process Monitoring, Diagnostics and Control Capabilities Nuclear Systems Technologies Nuclear Criticality Safety Research Reactor Analysis Decontamination and Decommissioning Systems/Process Monitoring, Diagnostics and Control Overview Process Monitoring & Signal Validation Diagnostic & Advisory Systems Advanced (AI-based) Nonlinear Controllers for Industrial Processes Artificial intelligence Other Capabilities Work with Argonne Contact us For Employees Site Map Help Systems/Process Monitoring, Diagnostics and Control Bookmark and Share Systems/Process Monitoring, Diagnostics and Control Systems/Process Monitoring, Diagnostics and Control. Click on image to view larger image. The goal of the Nuclear Engineering Division's research on advanced

237

HVDC system control for damping subsynchronous oscillations  

SciTech Connect

A method for designing a supplemental subsynchronous damping control (SSDC) for an HVDC transmission system is described. The SSDC eliminates torsional instabilities caused by interaction between conventional HVDC controls and turbine-generator rotor torsional modes of vibration. Results of digital simulation used in the design process are compared with measurements made on an HVDC simulator. Results of both digital simulations and HVDC simulator tests which demonstrate SSDC performance are shown. This research and development effort was sponsored by EPRI under RP1425-1.

Piwko, R.J.; Larsen, E.V.

1982-07-01T23:59:59.000Z

238

Control System Design Guide Element 5--Integrated Commissioning and Diagnostics  

E-Print Network (OSTI)

Control System Design Guide Element 5--Integrated Commissioning and Diagnostics Project 2 Performance Commercial Building Systems #12;Table of Contents: Control System Design Guide 1. How to Use the Design Guide 2. Control System Design Process 3. Selection and Installation of Control and Monitoring

239

Erratum: Formation Control of Multiple Mobile Robots Systems  

Science Journals Connector (OSTI)

The paper entitled “Formation Control of Multiple Mobile Robots Systems” by Zhanfeng Li, Youliang Ma...

Zhanfeng Li; Youliang Ma; Tong Ren

2008-01-01T23:59:59.000Z

240

Recommended Practice for Patch Management of Control Systems  

SciTech Connect

A key component in protecting a nation’s critical infrastructure and key resources is the security of control systems. The term industrial control system refers to supervisory control and data acquisition, process control, distributed control, and any other systems that control, monitor, and manage the nation’s critical infrastructure. Critical Infrastructure and Key Resources (CIKR) consists of electric power generators, transmission systems, transportation systems, dam and water systems, communication systems, chemical and petroleum systems, and other critical systems that cannot tolerate sudden interruptions in service. Simply stated, a control system gathers information and then performs a function based on its established parameters and the information it receives. The patch management of industrial control systems software used in CIKR is inconsistent at best and nonexistent at worst. Patches are important to resolve security vulnerabilities and functional issues. This report recommends patch management practices for consideration and deployment by industrial control systems owners.

Steven Tom; Dale Christiansen; Dan Berrett

2008-12-01T23:59:59.000Z

Note: This page contains sample records for the topic "access control system" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


241

Constraining Credential Usage in Logic-Based Access Control Carnegie Mellon University  

E-Print Network (OSTI)

how to modularly extend well- studied authorization logics to support the specification picture frames to smart refrigerators and Internet-connected security systems. The new functionality

Bauer, Lujo

242

Report on New Pumping System Software on Pumping Instrumentation and Control Skids  

SciTech Connect

This report documents the details of the Programmable Logic Controller (PLC) and the Data Table Access Module (DTAM) logic developed for the new pumping system employed for saltwell pumping. The new system is planned first for pumping A-101 where Pumping Instrumentation and Control (PIC) skid ''F'' is located. The new pump requires a bump start under certain conditions that will be controlled by the PLC. The bump start is to ensure sufficient water to the pump bearing cavities. The PLC logic is required to control the shutdown of the injection pump that supplies the water to the saltwell pump bearing cavities. Allowance to start and stop the injection pump will be controlled by the PLC at the PIC skid. This report is written for PIC skid ''P'', but will apply to other PIC skids where the new pumping system is deployed. The logic will remain the same, but the ladder rung-numbers may change from skid to skid.

HORNER, T.M.

2001-04-19T23:59:59.000Z

243

National Geothermal Data System: Transforming the Discovery, Access, and Analytics of Data for Geothermal Exploration  

SciTech Connect

Compendium of Papers from the 38th Workshop on Geothermal Reservoir Engineering Stanford University, Stanford, California February 11-13, 2013 The National Geothermal Data System (NGDS) is a distributed, interoperable network of data collected from state geological surveys across all fifty states and the nation’s leading academic geothermal centers. The system serves as a platform for sharing consistent, reliable, geothermal-relevant technical data with users of all types, while supplying tools relevant for their work. As aggregated data supports new scientific findings, this content-rich linked data ultimately broadens the pool of knowledge available to promote discovery and development of commercial-scale geothermal energy production. Most of the up-front risks associated with geothermal development stem from exploration and characterization of subsurface resources. Wider access to distributed data will, therefore, result in lower costs for geothermal development. NGDS is on track to become fully operational by 2014 and will provide a platform for custom applications for accessing geothermal relevant data in the U.S. and abroad. It is being built on the U.S. Geoscience Information Network (USGIN) data integration framework to promote interoperability across the Earth sciences community. The basic structure of the NGDS employs state-of-the art informatics to advance geothermal knowledge. The following four papers comprising this Open-File Report are a compendium of presentations, from the 38th Annual Workshop on Geothermal Reservoir Engineering, taking place February 11-13, 2013 at Stanford University, Stanford, California. “NGDS Geothermal Data Domain: Assessment of Geothermal Community Data Needs,” outlines the efforts of a set of nationwide data providers to supply data for the NGDS. In particular, data acquisition, delivery, and methodology are discussed. The paper addresses the various types of data and metadata required and why simple links to existing data are insufficient for promoting geothermal exploration. Authors of this paper are Arlene Anderson, US DOE Geothermal Technologies Office, David Blackwell, Southern Methodist University (SMU), Cathy Chickering (SMU), Toni Boyd, Oregon Institute of Technology’s GeoHeat Center, Roland Horne, Stanford University, Matthew MacKenzie, Uberity, Joe Moore, University of Utah, Duane Nickull, Uberity, Stephen Richard, Arizona Geological Survey, and Lisa Shevenell, University of Nevada, Reno. “NGDS User Centered Design: Meeting the Needs of the Geothermal Community,” discusses the user- centered design approach taken in the development of a user interface solution for the NGDS. The development process is research based, highly collaborative, and incorporates state-of-the-art practices to ensure a quality user interface for the widest and greatest utility. Authors of this paper are Harold Blackman, Boise State University, Suzanne Boyd, Anthro-Tech, Kim Patten, Arizona Geological Survey, and Sam Zheng, Siemens Corporate Research. “Fueling Innovation and Adoption by Sharing Data on the DOE Geothermal Data Repository Node on the National Geothermal Data System,” describes the motivation behind the development of the Geothermal Data Repository (GDR) and its role in the NGDS. This includes the benefits of using the GDR to share geothermal data of all types and DOE’s data submission process. Authors of this paper are Jon Weers, National Renewable Energy Laboratory and Arlene Anderson, US DOE Geothermal Technologies Office. Finally, “Developing the NGDS Adoption of CKAN for Domestic & International Data Deployment,” provides an overview of the “Node-In-A-Box” software package designed to provide data consumers with a highly functional interface to access the system, and to ease the burden on data providers who wish to publish data in the system. It is important to note that this software package constitutes a reference implementation and that the NGDS architecture is based on open standards, which means other server software can make resources available, a

Patten, Kim [Arizona Geological Survey

2013-05-01T23:59:59.000Z

244

Control system for a small fission reactor  

DOE Patents (OSTI)

A system for controlling the reactivity of a small fission reactor includes an elongated, flexible hollow tube in the general form of a helical coiled spring axially positioned around and outside of the reactor vessel in an annular space between the reactor vessel and a surrounding cylindrical-shaped neutron reflector. A neutron absorbing material is provided within the hollow tube with the rate of the reaction controlled by the extension and compression of the hollow tube, e.g., extension of the tube increases reactivity while its compression reduces reactivity, in varying the amount of neutron absorbing material disposed between the reactor vessel and the neutron reflector. Conventional mechanical displacement means may be employed to control the coil density of the hollow tube as desired.

Burelbach, J.P.; Kann, W.J.; Saiveau, J.G.

1985-02-08T23:59:59.000Z

245

A flexible control system for flexible manufacturing systems  

E-Print Network (OSTI)

in developing nations. The current efforts in automation are identified as flexible manufacturing systems (FMSs) if they are limited to the shop floor or computer integrated manufacturing (CIM) if they include front office functions including computer aided... Unfortunately, CIM systems are ?virtually out of reach of most of the small companies that could most benefit from CIM,? because no commercial software is available to perform integrated control over the individual shop floor components (Smith and Joshi, 1995...

Scott, Wesley Dane

2004-09-30T23:59:59.000Z

246

OPSEC and Culture in Control Systems  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Operational Security Operational Security (OPSEC) to Support a Cyber Security Culture in Control Systems Environments Version 1.0 Draft Recommended Practice February 2007 DISCLAIMER This report was prepared as an account of work sponsored by an agency of the U.S. Government. Neither the U.S. Government nor any agency thereof, nor any employee, makes any warranty, expressed or implied, or assumes any legal liability or responsibility for any third party's use, or the results of such use, or any information, apparatus, product, or process disclosed in this publication, or represents that its use by such third party would not infringe privately owned rights. i ii Using Operational Security(OPSEC) to Support a Cyber Security Culture in Control Systems Environments

247

Emerging-technology systems and arms control  

SciTech Connect

The Strategic Arms Reductions Treaty (START) and the Conventional Forces in Europe (CFE) agreements call for unprecedented cuts in strategic nuclear and conventional forces. But in contrast to earlier attempts to restrict technology development in previous arms control agreements, these two treaties will have no significant limitations on emerging technology weapons systems. This report examines whether the decision to set aside emerging technology restrictions may undermine the benefits of START and CFE over the lifetimes of these treaties. The United States and the Soviet Union may continue further arms control negotiations after current treaties have been completed. In particular, the two countries committed themselves at the June 1990 Summit to negotiations on a follow-on to START. This report examines how emerging technology systems might influence the approach the United States and the Soviet Union pursue in negotiations toward START II or CFE II treaties.

Lempert, R.; Chang, I.Y.; McCallum, K.

1991-01-01T23:59:59.000Z

248

EPICS - Experimental Physics and Industrial Control System  

NLE Websites -- All DOE Office Websites (Extended Search)

Security/Privacy Notice Security/Privacy Notice EPICS Home g+ EPICS Page on Google+ g+ Communities EPICS Users on Google+ Argonne National Laboratory Experimental Physics and Industrial Control System Home News About Base Modules Extensions Distributions Download EPICSv4 IRMIS Talk Bugs Documents Links Licensing Format page for printing Google Search Tech-talk EPICS Home Page EPICS is a set of Open Source software tools, libraries and applications developed collaboratively and used worldwide to create distributed soft real-time control systems for scientific instruments such as a particle accelerators, telescopes and other large scientific experiments. Sitemap Home: EPICS Home at APS News: Recent news Meetings: Collaboration meeting details Codeathons: Codeathon developer meetings About: What is EPICS anyway?

249

Optimally Controlled Flexible Fuel Powertrain System  

SciTech Connect

The primary objective of this project was to develop a true Flex Fuel Vehicle capable of running on any blend of ethanol from 0 to 85% with reduced penalty in usable vehicle range. A research and development program, targeting 10% improvement in fuel economy using a direct injection (DI) turbocharged spark ignition engine was conducted. In this project a gasoline-optimized high-technology engine was considered and the hardware and configuration modifications were defined for the engine, fueling system, and air path. Combined with a novel engine control strategy, control software, and calibration this resulted in a highly efficient and clean FFV concept. It was also intended to develop robust detection schemes of the ethanol content in the fuel integrated with adaptive control algorithms for optimized turbocharged direct injection engine combustion. The approach relies heavily on software-based adaptation and optimization striving for minimal modifications to the gasoline-optimized engine hardware system. Our ultimate objective was to develop a compact control methodology that takes advantage of any ethanol-based fuel mixture and not compromise the engine performance under gasoline operation.

Hakan Yilmaz; Mark Christie; Anna Stefanopoulou

2010-12-31T23:59:59.000Z

250

INTOR impurity control and first wall system  

SciTech Connect

The highlights of the recent INTOR effort on examining the key issues of the impurity control/first wall system are summarized. The emphasis of the work was an integrated study of the edge-region physics, plasma-wall interaction, materials, engineering and magnetic considerations associated with the poloidal divertor and pump limiter. The development of limiter and divertor collector plate designs with an acceptable lifetime was a major part of the work.

Abdou, M.A.

1983-04-01T23:59:59.000Z

251

f-MAC: A Deterministic Media Access Control Protocol Without Time Synchronization  

E-Print Network (OSTI)

Barroso and Cormac J. Sreenan Mobile and Internet Systems Laboratory (MISL), Computer Science Department, University College Cork (UCC), Ireland {u.roedig,a.barroso,c.sreenan}@cs.ucc.ie Abstract. Nodes in a wireless

Sreenan, Cormac J.

252

Study on Grid Access Control Strategy Based on Trust and Security Grade  

Science Journals Connector (OSTI)

The grid security is an important component, and it directly affects the development of the grid and the practical application of grid system software. As a kind of tool, GSI(Grid Security Infrastructure) provide...

Yihe Liu

2011-01-01T23:59:59.000Z

253

U-155: WebCalendar Access Control and File Inclusion Bugs Let...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

were reported in WebCalendar. A remote user may be able to execute arbitrary PHP code on the target system. reference links: SecurityTracker Alert ID: 1026966...

254

AUTOMATIC VARIABLE VENTILATION CONTROL SYSTEMS BASED ON AIR QUALITY DETECTION  

E-Print Network (OSTI)

Control Systems Based on Air Quality Detection Isaac Turiel,HVAC CONTROL SYSTEM BASED ON AIR QUALITY SENSING To Zl)(lecontrol systems based on air quality detection Isaac Turiel,

Turiel, Isaac

2011-01-01T23:59:59.000Z

255

System and method for controlling remote devices  

DOE Patents (OSTI)

A system and method for controlling remote devices utilizing a radio frequency identification (RFID) tag device having a control circuit adapted to render the tag device, and associated objects, permanently inoperable in response to radio-frequency control signals. The control circuit is configured to receive the control signals that can include an enable signal, and in response thereto enable an associated object, such as a weapon; and in response to a disable signal, to disable the tag itself, or, if desired, to disable the associated weapon or both the device and the weapon. Permanent disabling of the tag can be accomplished by several methods, including, but not limited to, fusing a fusable link, breaking an electrically conductive path, permanently altering the modulation or backscattering characteristics of the antenna circuit, and permanently erasing an associated memory. In this manner, tags in the possession of unauthorized employees can be remotely disabled, and weapons lost on a battlefield can be easily tracked and enabled or disabled automatically or at will.

Carrender, Curtis Lee (Richland, WA); Gilbert, Ronald W. (Benton City, WA); Scott, Jeff W. (Pasco, WA); Clark, David A. (Kennewick, WA)

2006-02-07T23:59:59.000Z

256

FEMP Technology Brief: Boiler Combustion Control and Monitoring System |  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Boiler Combustion Control and Monitoring Boiler Combustion Control and Monitoring System FEMP Technology Brief: Boiler Combustion Control and Monitoring System October 7, 2013 - 9:12am Addthis This composite photo shows technicians observing operation at the monitoring station and making subsequent fine adjustments on combustion system controls Technical staff are making boiler adjustments with the control and monitoring system. Photo courtesy of the Department of Defense's Environmental Security Technology Certification Program. Technology Description A novel combustion control system, along with gas sensors, sets the opening of fuel and air inlets based on flue-gas concentrations. Continuous feedback from measurements of oxygen, carbon monoxide, and nitrogen oxide concentrations enable the control system

257

Downhole Vibration Monitoring and Control System  

SciTech Connect

The objective of this program is to develop a system to both monitor the vibration of a bottomhole assembly, and to adjust the properties of an active damper in response to these measured vibrations. The key feature of this system is its use of a magnetorheological fluid (MRF) to allow the damping coefficient to be changed extensively, rapidly and reversibly without the use of mechanical valves, but only by the application of a current. Phase I of this program, which entailed modeling and design of the necessary subsystems and design, manufacture and test of a full laboratory prototype, was completed on May 31, 2004. Much of the effort was devoted to the design and testing of the MRF damper, itself. The principal objectives of Phase II were: more extensive laboratory testing, including the evaluation of different feedback algorithms for control of the damper; design and manufacture of a field prototype system; and, testing of the field prototype in a drilling laboratory. Phase II concluded on January 31, 2006, and a final report was issued. Work on Phase III of the project began during the first quarter, 2006, with the objectives of building precommercial prototypes, testing them in a drilling laboratory and the field; developing and implementing a commercialization plan. All of these have been accomplished. The Downhole Vibration Monitoring & Control System (DVMCS) prototypes have been successfully proven in testing at the TerraTek drilling facility and at the Rocky Mountain Oilfield Test Center (RMOTC.) Based on the results of these tests, we have signed a definitive development and distribution agreement with Smith, and commercial deployment is underway. This current version of the DVMCS monitors and controls axial vibrations. Due to time and budget constraints of this program, it was not possible to complete a system that would also deal with lateral and torsional (stick-slip) vibrations as originally planned; however, this effort is continuing without DOE funding.

Martin E. Cobern

2007-09-30T23:59:59.000Z

258

The Earth System Grid Federation: An Open Infrastructure for Access to Distributed Geospatial Data  

SciTech Connect

The Earth System Grid Federation (ESGF) is a multi-agency, international collaboration that aims at developing the software infrastructure needed to facilitate and empower the study of climate change on a global scale. The ESGF s architecture employs a system of geographically distributed peer nodes, which are independently administered yet united by the adoption of common federation protocols and application programming interfaces (APIs). The cornerstones of its interoperability are the peer-to-peer messaging that is continuously exchanged among all nodes in the federation; a shared architecture and API for search and discovery; and a security infrastructure based on industry standards (OpenID, SSL, GSI and SAML). The ESGF software is developed collaboratively across institutional boundaries and made available to the community as open source. It has now been adopted by multiple Earth science projects and allows access to petabytes of geophysical data, including the entire model output used for the next international assessment report on climate change (IPCC-AR5) and a suite of satellite observations (obs4MIPs) and reanalysis data sets (ANA4MIPs).

Ananthakrishnan, Rachana [Argonne National Laboratory (ANL); Bell, Gavin [Lawrence Livermore National Laboratory (LLNL); Cinquini, Luca [Jet Propulsion Laboratory, Pasadena, CA; Crichton, Daniel [Jet Propulsion Laboratory, Pasadena, CA; Danvil, Sebastian [Institut Pierre Simon Laplace (IPSL), Des Sciences de L'Environnement; Drach, Bob [Lawrence Livermore National Laboratory (LLNL); Fiore, Sandro [Euro-Mediterranean Center on Climate Change; Gonzalez, Estanislao [German Climate Computing Center; Harney, John F [ORNL; Mattmann, Chris [Jet Propulsion Laboratory, Pasadena, CA; Kershaw, Philip [STFC Rutherford Appleton Laboratory, NCAS/BADC; Miller, Neill [Argonne National Laboratory (ANL); Morgan, Mark [Institut Pierre Simon Laplace (IPSL), Des Sciences de L'Environnement; Pascoe, Stephen [STFC Rutherford Appleton Laboratory, NCAS/BADC; Schweitzer, Roland [Pacific Marine Environmental Laboratory, National Oceanic and Atmospheric Administration; Shipman, Galen M [ORNL; Wang, Feiyi [ORNL

2013-01-01T23:59:59.000Z

259

The Earth System Grid Federation: An Open Infrastructure for Access to Distributed Geo-Spatial Data  

SciTech Connect

The Earth System Grid Federation (ESGF) is a multi-agency, international collaboration that aims at developing the software infrastructure needed to facilitate and empower the study of climate change on a global scale. The ESGF s architecture employs a system of geographically distributed peer nodes, which are independently administered yet united by the adoption of common federation protocols and application programming interfaces (APIs). The cornerstones of its interoperability are the peer-to-peer messaging that is continuously exchanged among all nodes in the federation; a shared architecture and API for search and discovery; and a security infrastructure based on industry standards (OpenID, SSL, GSI and SAML). The ESGF software is developed collaboratively across institutional boundaries and made available to the community as open source. It has now been adopted by multiple Earth science projects and allows access to petabytes of geophysical data, including the entire model output used for the next international assessment report on climate change (IPCC-AR5) and a suite of satellite observations (obs4MIPs) and reanalysis data sets (ANA4MIPs).

Cinquini, Luca [Jet Propulsion Laboratory, Pasadena, CA; Crichton, Daniel [Jet Propulsion Laboratory, Pasadena, CA; Miller, Neill [Argonne National Laboratory (ANL); Mattmann, Chris [Jet Propulsion Laboratory, Pasadena, CA; Harney, John F [ORNL; Shipman, Galen M [ORNL; Wang, Feiyi [ORNL; Bell, Gavin [Lawrence Livermore National Laboratory (LLNL); Drach, Bob [Lawrence Livermore National Laboratory (LLNL); Ananthakrishnan, Rachana [Argonne National Laboratory (ANL); Pascoe, Stephen [STFC Rutherford Appleton Laboratory, NCAS/BADC; Kershaw, Philip [STFC Rutherford Appleton Laboratory, NCAS/BADC; Gonzalez, Estanislao [German Climate Computing Center; Fiore, Sandro [Euro-Mediterranean Center on Climate Change; Schweitzer, Roland [Pacific Marine Environmental Laboratory, National Oceanic and Atmospheric Administration; Danvil, Sebastian [Institut Pierre Simon Laplace (IPSL), Des Sciences de L'Environnement; Morgan, Mark [Institut Pierre Simon Laplace (IPSL), Des Sciences de L'Environnement

2012-01-01T23:59:59.000Z

260

Control system for the prototype of hydrogen powered car  

Science Journals Connector (OSTI)

The contribution describes design and construction of hydrogen powered car based on fuel cell technology and electrical DC-drive. The main focus is given to control system and human machine interface of the car. The practical solution of control system ... Keywords: control system design, fuel cells, human machine interface, hydrogen, programmable controllers

Jiri Koziorek; Zdenek Slanina

2005-11-01T23:59:59.000Z

Note: This page contains sample records for the topic "access control system" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


261

Data Access  

Science Journals Connector (OSTI)

Data access is access to collected and compiled data for the purposes of analysis and reporting. Data access can be allowed to different persons, ... depending on their nature: access to fundamental data for sta...

2008-01-01T23:59:59.000Z

262

Screening for Colorectal Cancer in a Safety-Net Health Care System: Access to Care Is Critical and Has Implications for Screening Policy  

Science Journals Connector (OSTI)

...Cancer in a Safety-Net Health Care System: Access to Care Is Critical and Has Implications for Screening Policy...cancer in a safety-net health care system: access to care is critical and has implications for screening policy...sparse for safety-net health systems. A retrospective...

Samir Gupta; Liyue Tong; James E. Allison; Elizabeth Carter; Mark Koch; Don C. Rockey; Paula Anderson; Chul Ahn; Keith Argenbright; and Celette Sugg Skinner

2009-09-01T23:59:59.000Z

263

Control system and method for a universal power conditioning system  

SciTech Connect

A new current loop control system method is proposed for a single-phase grid-tie power conditioning system that can be used under a standalone or a grid-tie mode. This type of inverter utilizes an inductor-capacitor-inductor (LCL) filter as the interface in between inverter and the utility grid. The first set of inductor-capacitor (LC) can be used in the standalone mode, and the complete LCL can be used for the grid-tie mode. A new admittance compensation technique is proposed for the controller design to avoid low stability margin while maintaining sufficient gain at the fundamental frequency. The proposed current loop controller system and admittance compensation technique have been simulated and tested. Simulation results indicate that without the admittance path compensation, the current loop controller output duty cycle is largely offset by an undesired admittance path. At the initial simulation cycle, the power flow may be erratically fed back to the inverter causing catastrophic failure. With admittance path compensation, the output power shows a steady-state offset that matches the design value. Experimental results show that the inverter is capable of both a standalone and a grid-tie connection mode using the LCL filter configuration.

Lai, Jih-Sheng; Park, Sung Yeul; Chen, Chien-Liang

2014-09-02T23:59:59.000Z

264

Tandem robot control system and method for controlling mobile robots in tandem  

SciTech Connect

A control system for controlling mobile robots provides a way to control mobile robots, connected in tandem with coupling devices, to navigate across difficult terrain or in closed spaces. The mobile robots can be controlled cooperatively as a coupled system in linked mode or controlled individually as separate robots.

Hayward, David R. (Albuquerque, NM); Buttz, James H. (Albuquerque, NM); Shirey, David L. (Albuquerque, NM)

2002-01-01T23:59:59.000Z

265

Methodic design of a measurement and control system for climate control in horticulture  

Science Journals Connector (OSTI)

Many papers describe applications of advanced controllers in greenhouses. As control literature focusses on control algorithms, the layout of the measurement and control system is usually underexposed. Unfortunately, commercially available greenhouse ... Keywords: Closed greenhouse, Measurement and control system, Methodic design, Watergy project

S. L. Speetjens; H. J. J. Janssen; G. van Straten; Th. H. Gieling; J. D. Stigter

2008-12-01T23:59:59.000Z

266

Conceptual design for the NSTX central instrumentation and control system  

Science Journals Connector (OSTI)

The design and construction phase for the national spherical torus experiment (NSTX) is under way at the Princeton Plasma Physics Laboratory (PPPL). Operation is scheduled to begin on April 30, 1999. This paper describes the conceptual design for the NSTX central instrumentation and control (I&C) system. Major elements of the central I&C system include the process control system, plasma control system, network system, data acquisition system, and synchronization system to support the NSTX experimental device.

D Bashore; G Oliaro; P Roney; P Sichta; K Tindall

1999-01-01T23:59:59.000Z

267

Control valve for solar heating systems  

SciTech Connect

A control valve for a solar heating system is disclosed. The valve has a valve body which defines four chambers disposed end to end. A valve operating rod is movable axially through all four chambers under motor control and carries a valve member for directing liquid through the valve. In one position of the valve member, incoming liquid is directed to an outlet for connection to a solar collector and liquid returning from the collector can flow through the valve body and back to the swimming pool. In the other position of the valve member, the liquid bypasses the collector and is directed back to the pool while liquid in the collector drains back into the valve body through the outlet and is removed by suction from a drain-down chamber in the valve body.

Stewart, J.M.

1981-12-29T23:59:59.000Z

268

Fault Tolerant Oxygen Control of a Diesel Engine Air System  

E-Print Network (OSTI)

Fault Tolerant Oxygen Control of a Diesel Engine Air System Rainer Nitsche Matthias Bitzer control problem of a Diesel engine air system having a jammed Exhaust Gas Recirculation (EGR) valve of the air system. Keywords: Fault tolerant control, Diesel engine, Air system, Model-based trajectory

Paris-Sud XI, Université de

269

Energy Efficient Pump Control for an Offshore Oil Processing System  

E-Print Network (OSTI)

Energy Efficient Pump Control for an Offshore Oil Processing System Zhenyu Yang Kian Soleiman Bo, Denmark. Abstract: The energy efficient control of a pump system for an offshore oil processing system control, energy saving 1. INTRODUCTION Pump systems have been extensively used in offshore oil & gas

Yang, Zhenyu

270

Closing the Gap in Control System Implementations  

E-Print Network (OSTI)

of off-line scheduling and optimal control. ” In Proceedingsframework for scheduling control tasks from multiple controlthe problem of scheduling control tasks from multiple

Saha, Indranil

2013-01-01T23:59:59.000Z

271

Occupant Response to Window Control Signaling Systems  

E-Print Network (OSTI)

1 Concurrent air supply, outdoor temperature control 1. 654air supply, outdoor temperature control 8. Lincoln Hall,Concurrent air supply; outdoor temperature control.    In 

Ackerly, Katherine

2012-01-01T23:59:59.000Z

272

Systems and Controls Analysis and Testing; Harvesting More Wind Energy with Advanced Controls Technology (Fact Sheet)  

SciTech Connect

This fact sheet outlines the systems and controls analysis and testing that takes place at the NWTC on the Controls Advanced Research Turbines.

Not Available

2010-01-01T23:59:59.000Z

273

Control Systems Security Standards: Accomplishments & Impacts  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

019 019 Unlimited Release November 2007 Control Systems Security Standards Accomplishments & Impacts Ronald Halbgewachs Prepared by Sandia National Laboratories Albuquerque, New Mexico 87185 and Livermore, California 94550 Sandia is a multiprogram laboratory operated by Sandia Corporation, a Lockheed Martin Company, for the United States Department of Energy's National Nuclear Security Administration under Contract DE-AC04-94AL85000. Approved for public release; further dissemination unlimited. 2 Issued by Sandia National Laboratories, operated for the United States Department of Energy by Sandia Corporation. NOTICE: This report was prepared as an account of work sponsored by an agency of the United States Government. Neither the United States Government, nor any agency

274

Variable pressure power cycle and control system  

DOE Patents (OSTI)

A variable pressure power cycle and control system that is adjustable to a variable heat source is disclosed. The power cycle adjusts itself to the heat source so that a minimal temperature difference is maintained between the heat source fluid and the power cycle working fluid, thereby substantially matching the thermodynamic envelope of the power cycle to the thermodynamic envelope of the heat source. Adjustments are made by sensing the inlet temperature of the heat source fluid and then setting a superheated vapor temperature and pressure to achieve a minimum temperature difference between the heat source fluid and the working fluid.

Goldsberry, Fred L. (Spring, TX)

1984-11-27T23:59:59.000Z

275

Controls system developments for the ERL facility  

SciTech Connect

The BNL Energy Recovery LINAC (ERL) is a high beam current, superconducting RF electron accelerator that is being commissioned to serve as a research and development prototype for a RHIC facility upgrade for electron-ion collision (eRHIC). Key components of the machine include a laser, photocathode, and 5-cell superconducting RF cavity operating at a frequency of 703 MHz. Starting with a foundation based on existing ADO software running on Linux servers and on the VME/VxWorks platforms developed for RHIC, we are developing a controls system that incorporates a wide range of hardware I/O interfaces that are needed for machine R&D. Details of the system layout, specifications, and user interfaces are provided.

Jamilkowski, J.; Altinbas, Z.; Gassner, D.; Hoff, L.; Kankiya, P.; Kayran, D.; Miller, T.; Olsen, R.; Sheehy, B.; Xu, W.

2011-10-07T23:59:59.000Z

276

Decentralized, Cooperative Control of Multivehicle Systems: Design and Stability Analysis  

E-Print Network (OSTI)

, and there is a shift toward decentralized, cooperative systems for computational efficiency and robustness. In a decentralized control scheme, control inputs are determined onboard each vehicle; therefore, decentralized controllers are more efficient for large...

Weitz, Lesley A.

2010-01-16T23:59:59.000Z

277

Design and Realization of Turbo-expander Control System  

Science Journals Connector (OSTI)

The inefficient of manual control and isolation of instrument control cannot meet the requirements of production. However, DCS fully reveals its superiority. This paper elaborates the control system based on E...

Jintang Yang; Jiaohua Shi; Gongfa Li; Zhaohui Xia…

2011-01-01T23:59:59.000Z

278

Functional safety of adaptive embedded control systems: new solutions  

Science Journals Connector (OSTI)

This paper deals with the functional safety of embedded control system following component-based technologies. The functional safety in a device of the interconnected control components is handled by an agent that controls and adapts the local behaviour ...

Atef Gharbi, Mohamed Khalgui

2014-09-01T23:59:59.000Z

279

Method and apparatus for single-stepping coherence events in a multiprocessor system under software control  

DOE Patents (OSTI)

An apparatus and method are disclosed for single-stepping coherence events in a multiprocessor system under software control in order to monitor the behavior of a memory coherence mechanism. Single-stepping coherence events in a multiprocessor system is made possible by adding one or more step registers. By accessing these step registers, one or more coherence requests are processed by the multiprocessor system. The step registers determine if the snoop unit will operate by proceeding in a normal execution mode, or operate in a single-step mode.

Blumrich, Matthias A. (Ridgefield, CT); Salapura, Valentina (Chappaqua, NY)

2010-11-02T23:59:59.000Z

280

Decentralized robust control of a class of nonlinear systems and application to a boiler system  

E-Print Network (OSTI)

Decentralized robust control of a class of nonlinear systems and application to a boiler system Keywords: Asymptotic disturbance rejection Boiler systems Decentralized robust control Descriptor systems problem, a decentralized controller for the system can be calculated. In order to control a utility boiler

Marquez, Horacio J.

Note: This page contains sample records for the topic "access control system" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


281

AN INTEGRATED BIOLOGICAL CONTROL SYSTEM AT HANFORD  

SciTech Connect

In 1999 an integrated biological control system was instituted at the U.S. Department of Energy's Hanford Site. Successes and changes to the program needed to be communicated to a large and diverse mix of organizations and individuals. Efforts at communication are directed toward the following: Hanford Contractors (Liquid or Tank Waste, Solid Waste, Environmental Restoration, Science and Technology, Site Infrastructure), General Hanford Employees, and Hanford Advisory Board (Native American Tribes, Environmental Groups, Local Citizens, Washington State and Oregon State regulatory agencies). Communication was done through direct interface meetings, individual communication, where appropriate, and broadly sharing program reports. The objectives of the communication efforts was to have the program well coordinated with Hanford contractors, and to have the program understood well enough that all stakeholders would have confidence in the work performed by the program to reduce or elimated spread of radioactive contamination by biotic vectors. Communication of successes and changes to an integrated biological control system instituted in 1999 at the Department of Energy's Hanford Site have required regular interfaces with not only a diverse group of Hanford contractors (i.e., those responsible for liquid or tank waste, solid wastes, environmental restoration, science and technology, and site infrastructure), and general Hanford employees, but also with a consortium of designated stake holders organized as the Hanford Advisory Board (i.e., Native American tribes, various environmental groups, local citizens, Washington state and Oregon regulatory agencies, etc.). Direct interface meetings, individual communication where appropriate, and transparency of the biological control program were the methods and outcome of this effort.

JOHNSON AR; CAUDILL JG; GIDDINGS RF; RODRIGUEZ JM; ROOS RC; WILDE JW

2010-02-11T23:59:59.000Z

282

Adaptive Power Control for Single and Multiuser Opportunistic Systems  

E-Print Network (OSTI)

In this dissertation, adaptive power control for single and multiuser opportunistic systems is investigated. First, a new adaptive power-controlled diversity combining scheme for single user systems is proposed, upon which is extended...

Nam, Sung Sik

2010-07-14T23:59:59.000Z

283

Cyber-Security of Networked Control Systems Karl Henrik Johansson  

E-Print Network (OSTI)

7/3/12 1 Cyber-Security of Networked Control Systems Karl Henrik Johansson #12;7/3/12 2 Recent Cyber-ARacks on Control Systems Cyber-Security of Networked

Johansson, Karl Henrik

284

Performance of Johnson Matthey EGRT? Emission Control System...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

of Johnson Matthey Performance of Johnson Matthey EGRT EGRT (tm) (tm) Emission Control System Emission Control System for for NOx NOx and PM Emission and PM Emission Reduction in...

285

First operational experience with the CMS Run Control System  

E-Print Network (OSTI)

The Run Control System of the Compact Muon Solenoid (CMS) experiment at CERN's new Large Hadron Collider (LHC) controls the sub-detector and central data acquisition systems and the high-level trigger farm of the experiment. ...

Bauer, Gerry P.

286

A neural based position controller for an electrohydraulic servo system  

Science Journals Connector (OSTI)

This paper proposes a neural network based controller for controlling the position of an electrohydraulic servo system. Feedforward network structure, which consists of an input and output layer with one linear neuron, a hidden layer with two nonlinear ... Keywords: adaptive control, electrohydraulic servo system, model reference control, neural networks

?ahin Yildirim; Selçuk Erkaya; ?brahim Uzmay; Menderes Kalkat

2011-03-01T23:59:59.000Z

287

Adaptive control based on neural network system identification  

Science Journals Connector (OSTI)

In adaptive control and system identification the self tuning regulator has wide range of applications. Neural network and artificial intelligence have big role in this area. This paper presents adaptive neural network control based on self tuning regulator ... Keywords: adaptive control, neural network, neuro control, self tuning regulator, system identification

Hassan E. A. Ibrahim

2012-02-01T23:59:59.000Z

288

Industrial Steam System Process-Control Schemes | Department...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Steam System Process-Control Schemes (July 2003) More Documents & Publications Compressed Air Storage Strategies Save Energy Now in Your Steam Systems CIBO Energy Efficiency...

289

Introducing Back-up to Active Compressor Surge Control System  

E-Print Network (OSTI)

in a system with increased performance by taking advantage of both systems. Keywords: centrifugal compressorIntroducing Back-up to Active Compressor Surge Control System Nur Uddin Jan Tommy Gravdahl for introducing a back-up system to an active compressor surge control system is presented in this paper. Active

Gravdahl, Jan Tommy

290

Green Scheduling: Scheduling of Control Systems for Peak Power Reduction  

E-Print Network (OSTI)

approach to fine-grained coordination of energy demand by scheduling energy consuming control systems of the system variables only, control system execution (i.e. when energy is supplied to the system-Scheduling; Energy Systems; Peak Power Reduction; Load Balancing; I. INTRODUCTION During a major sporting event

Pappas, George J.

291

Phase Space Navigator: Towards Automating Control Synthesis in Phase Spaces for Nonlinear Control Systems  

E-Print Network (OSTI)

We develop a novel autonomous control synthesis strategy called Phase Space Navigator for the automatic synthesis of nonlinear control systems. The Phase Space Navigator generates global control laws by synthesizing ...

Zhao, Feng

1991-04-01T23:59:59.000Z

292

Integrated Modeling and Design of Nonlinear Control Systems  

E-Print Network (OSTI)

Integrated Modeling and Design of Nonlinear Control Systems Gilmer L. Blankenship Harry G. Kwatny building, simulation, control system design and real time implementation. Software Environment Overview: A summary description of a symbolic computing environment for nonlinear control system design is provided

Kwatny, Harry G.

293

Synthesis of Optimal Controllers for Cyber Physical Systems Salar Moarref  

E-Print Network (OSTI)

Synthesis of Optimal Controllers for Cyber Physical Systems Salar Moarref November 16, 2012 construction. In this framework, we consider controller synthesis problem: given a model of the system.e. a controller that optimizes a quantitative measure.We review some of the recent works on synthesis of optimal

Plotkin, Joshua B.

294

Embedded Control Systems Research Lab Truth, American Culture, and  

E-Print Network (OSTI)

Embedded Control Systems Research Lab Truth, American Culture, and Fuzzy Logic Dan Simon Cleveland" (Wiener) ­ Postmodernism: Amoral, liable to misuse ­ Fuzzy logic: ??? #12;Embedded Control Systems Control Systems Research Lab Modernism, pre- and post- · Does fuzzy logic work because it is true

Simon, Dan

295

STABILITY OF PRODUCTION-INVENTORY CONTROL SYSTEMS CONSIDERING INVENTORY SHORTAGES  

E-Print Network (OSTI)

STABILITY OF PRODUCTION-INVENTORY CONTROL SYSTEMS CONSIDERING INVENTORY SHORTAGES Jayendran@iitb.ac.in) Extended Abstract The modelling and analysis of the production-inventory control systems of manufacturing to examine the production and inventory dynamics is the application of system dynamics and control theoretic

Venkateswaran, Jayendran

296

Thermostatically controlled solar heating and cooling system  

SciTech Connect

This patent describes a solar heating and cooling system for simultaneously heating or cooling an ambient air system within a building, heating a hot water supply for domestic use within the building and heating or cooling a swimming pool adjacent the building comprising a building. This comprises a swimming pool as a primary water source, a solar connector connected to the swimming pool, a heat pump for controlling ambient air temperature within the building, an energy conservation unit connected to the heat pump and to the hot water supply for utilizing hot gases from the heat pump to heat water in the hot water supply and an air heat exchanger connected to the air system and to the heat pump for selectively heating or cooling air in the building. Also a water heat exchanger is connected to a water source for selectively transferring heat between the heat pump and the water source, a well as a secondary water source connected to the water heat exchanger.

Yovanofski, T.

1986-12-16T23:59:59.000Z

297

Electric vehicle regenerative antiskid braking and traction control system  

DOE Patents (OSTI)

An antiskid braking and traction control system for an electric or hybrid vehicle having a regenerative braking system operatively connected to an electric traction motor, and a separate hydraulic braking system includes one or more sensors for monitoring present vehicle parameters and a processor, responsive to the sensors, for calculating vehicle parameters defining the vehicle behavior not directly measurable by the sensors and determining if regenerative antiskid braking control, requiring hydrualic braking control, or requiring traction control are required. The processor then employs a control strategy based on the determined vehicle state and provides command signals to a motor controller to control the operation of the electric traction motor and to a brake controller to control fluid pressure applied at each vehicle wheel to provide the appropriate regenerative antiskid braking control, hydraulic braking control, and traction control.

Cikanek, Susan R. (Wixom, MI)

1995-01-01T23:59:59.000Z

298

Vulnerability Analysis of Energy Delivery Control Systems  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

0-18381 0-18381 Vulnerability Analysis of Energy Delivery Control Systems September 2011 Idaho National Laboratory Idaho Falls, Idaho 83415 http://www.inl.gov Prepared for the U.S. Department of Energy Office of Electricity Delivery and Energy Reliability Under DOE Idaho Operations Office Contract DE-AC07-05ID14517 The INL is a U.S. Department of Energy National Laboratory operated by Battelle Energy Alliance DISCLAIMER This information was prepared as an account of work sponsored by an agency of the U.S. Government. Neither the U.S. Government nor any agency thereof, nor any of their employees, makes any warranty, expressed or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness, of any information, apparatus, product, or

299

Active control system for high speed windmills  

DOE Patents (OSTI)

A pump stroke is matched to the operating speed of a high speed windmill. The windmill drives a hydraulic pump for a control. Changes in speed of a wind driven shaft open supply and exhaust valves to opposite ends of a hydraulic actuator to lengthen and shorten an oscillating arm thereby lengthening and shortening the stroke of an output pump. Diminishing wind to a stall speed causes the valves to operate the hydraulic cylinder to shorten the oscillating arm to zero. A pressure accumulator in the hydraulic system provides the force necessary to supply the hydraulic fluid under pressure to drive the actuator into and out of the zero position in response to the windmill shaft speed approaching and exceeding windmill stall speed. 4 figs.

Avery, D.E.

1988-01-12T23:59:59.000Z

300

Process control system using polarizing interferometer  

DOE Patents (OSTI)

A system for non-destructively measuring an object and controlling industrial processes in response to the measurement is disclosed in which an impulse laser generates a plurality of sound waves over timed increments in an object. A polarizing interferometer is used to measure surface movement of the object caused by the sound waves and sensed by phase shifts in the signal beam. A photon multiplier senses the phase shift and develops an electrical signal. A signal conditioning arrangement modifies the electrical signals to generate an average signal correlated to the sound waves which in turn is correlated to a physical or metallurgical property of the object, such as temperature, which property may then be used to control the process. External, random vibrations of the workpiece are utilized to develop discernible signals which can be sensed in the interferometer by only one photon multiplier. In addition the interferometer includes an arrangement for optimizing its sensitivity so that movement attributed to various waves can be detected in opaque objects. The interferometer also includes a mechanism for sensing objects with rough surfaces which produce speckle light patterns. Finally the interferometer per se, with the addition of a second photon multiplier is capable of accurately recording beam length distance differences with only one reading.

Schultz, Thomas J. (Maumee, OH); Kotidis, Petros A. (Waban, MA); Woodroffe, Jaime A. (North Reading, MA); Rostler, Peter S. (Newton, MA)

1994-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "access control system" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


301

Optimal Integrated Control and Scheduling of Networked Control Systems with Communication  

E-Print Network (OSTI)

1 Optimal Integrated Control and Scheduling of Networked Control Systems with Communication Abstract-- This paper addresses the problem of the optimal control and scheduling of Networked Control. This formulation allows the solving of the optimal control and scheduling problem using efficient branch and bound

Paris-Sud XI, Université de

302

Primer Control System Cyber Security Framework and Technical Metrics  

SciTech Connect

The Department of Homeland Security National Cyber Security Division supported development of a control system cyber security framework and a set of technical metrics to aid owner-operators in tracking control systems security. The framework defines seven relevant cyber security dimensions and provides the foundation for thinking about control system security. Based on the developed security framework, a set of ten technical metrics are recommended that allow control systems owner-operators to track improvements or degradations in their individual control systems security posture.

Wayne F. Boyer; Miles A. McQueen

2008-05-01T23:59:59.000Z

303

Java Automation Controller and Real-Time Systems  

NLE Websites -- All DOE Office Websites (Extended Search)

Java Automation Controller and Real-Time Systems Java Automation Controller and Real-Time Systems Speaker(s): Greg Bollella Date: June 29, 2009 - 12:00pm Location: 90-3122 Java has always been a disruptive technology and now it is breaking the mold in industrial, process, building, and transportation automation systems. For many years, programmable logic controllers (PLCs), the digital versions of old relay-based control systems (such as that used in the NYC Subway system in the late 1800s) have primarily controlled these systems. PLCs are the workhorses of the controls industry but the market is characterized by proprietary, closed, expensive, special-purpose solutions. A Java-based automation controller breaks the mold by allowing control algorithms, which require strict real-time capabilities, to run on

304

Data Products from W.A.V.E.S: Web-Accessible Visualization and Extraction System (CDIAC)  

DOE Data Explorer (OSTI)

W.A.V.E.S. stands for the Web-Accessible Visualization and Extraction System. Implemented in 2007, this specialized data interface allows users to search for ocean carbon data and receive on screen tables of data, data plots, or data files to download. An interactive map assists in the search, which has many customized search and output parameters. Both discrete data and underway data from ships' cruises are available for search.

305

International Rectifier Power Control Systems | Open Energy Information  

Open Energy Info (EERE)

Rectifier Power Control Systems Rectifier Power Control Systems Jump to: navigation, search Name International Rectifier Power Control Systems Place El Segundo, California Zip 90245 Product Originally a division of International Rectifier Corporation manufacturing semiconductor and module components for power management products. References International Rectifier Power Control Systems[1] LinkedIn Connections CrunchBase Profile No CrunchBase profile. Create one now! This article is a stub. You can help OpenEI by expanding it. International Rectifier Power Control Systems is a company located in El Segundo, California . References ↑ "International Rectifier Power Control Systems" Retrieved from "http://en.openei.org/w/index.php?title=International_Rectifier_Power_Control_Systems&oldid=347055"

306

Selection and Evaluation of Energy Management and Control Systems  

E-Print Network (OSTI)

that at one time or another the central control of any system will fail. Therefore, it is an absolute must that any system allow for reasonable function ing with the central control inoperable. S. A system should be appropriate to the situations within... that at one time or another the central control of any system will fail. Therefore, it is an absolute must that any system allow for reasonable function ing with the central control inoperable. S. A system should be appropriate to the situations within...

Moderow, R. R.

1982-01-01T23:59:59.000Z

307

Next Generation Nuclear Plant Resilient Control System Functional Analysis  

SciTech Connect

Control Systems and their associated instrumentation must meet reliability, availability, maintainability, and resiliency criteria in order for high temperature gas-cooled reactors (HTGRs) to be economically competitive. Research, perhaps requiring several years, may be needed to develop control systems to support plant availability and resiliency. This report functionally analyzes the gaps between traditional and resilient control systems as applicable to HTGRs, which includes the Next Generation Nuclear Plant; defines resilient controls; assesses the current state of both traditional and resilient control systems; and documents the functional gaps existing between these two controls approaches as applicable to HTGRs. This report supports the development of an overall strategy for applying resilient controls to HTGRs by showing that control systems with adequate levels of resilience perform at higher levels, respond more quickly to disturbances, increase operational efficiency, and increase public protection.

Lynne M. Stevens

2010-07-01T23:59:59.000Z

308

The use of expert systems in well control  

E-Print Network (OSTI)

of this research was to combine well control simulators and expert systems, into an effective well control training tool. Also of great importance was that the system should be based around a small computer system like the Macintosh II. A Driller's Panel... Hierarchy Program Manager Data Entry Driller's Panel Simulator ? Pre-Kick Environment. Pre-Kick Expert System Predictive Model Driller's Panel Simulator - Circulation Environment Circulation Expert System VERIFICATION OF THE SYSTEM Data Used...

Stoll, Paul Eugene

1990-01-01T23:59:59.000Z

309

GAO Challenges and Efforts to Secure Control Systems (March 2004) |  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

GAO Challenges and Efforts to Secure Control Systems (March 2004) GAO Challenges and Efforts to Secure Control Systems (March 2004) GAO Challenges and Efforts to Secure Control Systems (March 2004) Computerized control systems perform vital functions across many of our nation's critical infrastructures. For example, in natural gas distribution, they can monitor and control the pressure and flow of gas through pipelines. In October 1997, the President's Commission on Critical Infrastructure Protection emphasized the increasing vulnerability of control systems to cyber attacks. The House Committee on Government Reform and its Subcommittee on Technology, Information Policy, Intergovernmental Relations and the Census asked GAO to report on potential cyber vulnerabilities, focusing on (1) significant cybersecurity risks associated with control systems (2) potential and reported cyber attacks

310

Apparatus for controlling system state based on unique identifiers  

DOE Patents (OSTI)

An apparatus allows workers to assert and release control over the energization of a system. The apparatus does not require the workers to carry any additional paraphernalia, and is not be easily defeated by other workers. Users asserting and releasing control present tokens uniquely identifying each user to a reader, and the apparatus prevents transition of the system to an undesired state until an appropriate number of users are currently asserting control. For example, a dangerous manufacturing robot can be prevented from energizing until all the users that have asserted control when entering the robot's controlled space have subsequently released control when leaving the robot's controlled space.

Drotning, William D. (Albuquerque, NM)

2002-01-01T23:59:59.000Z

311

Stochastic Sensor Scheduling for Networked Control Systems Farhad Farokhi  

E-Print Network (OSTI)

Stochastic Sensor Scheduling for Networked Control Systems Farhad Farokhi and Karl H. Johansson Abstract Optimal sensor scheduling with applications to networked estimation and control systems to optimal control of Markov chains, we extract an optimal scheduling policy to fairly allocate the network

Johansson, Karl Henrik

312

An Optimal General Purpose Scheduler for Networked Control Systems  

E-Print Network (OSTI)

An Optimal General Purpose Scheduler for Networked Control Systems Ahmed Elmahdi , Ahmad F Taha to control the time delay is to im- prove the scheduling criterion. This paper proposes an optimal scheduling the stability of the control system. The proposed optimal schedul- ing protocol is a hybrid scheduling criterion

Sun, Dengfeng

313

Scheduling and Feedback Co-Design for Networked Control Systems  

E-Print Network (OSTI)

Scheduling and Feedback Co-Design for Networked Control Systems Michael S. Branicky,1 Stephen M mes- sages are transmitted). In the past, control system design and CPU scheduling or network scheduling design have normally been sepa- rated. This separation has allowed the control commu- nity

Branicky, Michael S.

314

Topics in Modeling, Control, and Implementation in Automotive Systems  

E-Print Network (OSTI)

on inclusion of the dynamics of load transfer, which are of importance in active yaw-control and rollTopics in Modeling, Control, and Implementation in Automotive Systems #12;#12;Topics in Modeling, Control, and Implementation in Automotive Systems Magnus Gäfvert Lund 2003 #12;To my Mother (1943 ­ 1995

315

Co-Simulation Tools for Networked Control Systems  

E-Print Network (OSTI)

, unmanned vehicles, home robotics, distributed virtual environments, power distribution, and building-simulation. The first two tools are extensions to ns-2 called Agent/Plant and NSCSPlant; the third tool integrates and control of the physical world. (right) A networked control system with one controlled system (a.k.a. plant

Branicky, Michael S.

316

H? controller and bumpless transfer design for marine propulsion system  

Science Journals Connector (OSTI)

A method for controller design and switching controller without bump effect has been proposed for a marine propulsion system with diesel engine used as propeller prime-mover. Due to different regimens operation of ship propulsion, it is common practice ... Keywords: H controller, bumpless transfer, ship propulsion system

M. J. Lopez; L. Garcia; J. Lorenzo; A. Consegliere

2009-12-01T23:59:59.000Z

317

Sliding Mode Control of EV Electric Differential System  

E-Print Network (OSTI)

of an electric differential system for Electric Vehicle (EV) with two induction motor drives (one for each wheel of electric drives to control the generated torque and the introduction of an independent control400 1 Sliding Mode Control of EV Electric Differential System A. Haddoun, M. E. H. Benbouzid, D

Paris-Sud XI, Université de

318

The Powerhouse Control System Audit as a Means of Insuring a Successful System Design and Implementation  

E-Print Network (OSTI)

-70 Type System Survey - Characterized by Single Loop Analog Instrument System, relay or indi vidual PLC's and tennor drum programmers. ? Number of controllers not in automatic con trol. ? Review of recorder charts for effectiveness of control... the electrical system. Review the MCC's, electric rooms and control systems. 1980-1990 Type System Survey - Characterized by the application of networked PLC and DCS Systems in addition to the analog controls ? Check equipment health, communication and I...

Wood, M. E.; Robinson, J. E.

319

Automatic Voltage Control of Electrical Systems  

Science Journals Connector (OSTI)

... to have complete automatic voltage regulation and it also has supervisory control for its main substations. By a careful application of automatically controlled regulators it is shown that the voltage ...

1934-01-20T23:59:59.000Z

320

Cyber Effects Analysis Using VCSE Promoting Control System Reliability |  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Cyber Effects Analysis Using VCSE Promoting Control System Cyber Effects Analysis Using VCSE Promoting Control System Reliability Cyber Effects Analysis Using VCSE Promoting Control System Reliability This report describes the Virtual Control System Environment (VCSE) technology- developed at Sandia National Laboratories-to investigate Supervisory Control And Data Acquisition (SCADA) vulnerabilities associated with energy systems; and it describes a set of experiments with findings from using that environment. The report explains how VCSE can be used to analyze and develop an understanding of cyber attacks. Specific analyses in this report focus on unencrypted, unsecured data channels on Internet protocol (IP)-routed computer networks within electric power systems. Cyber Effects Analysis Using VCSE Promoting Control System Reliability

Note: This page contains sample records for the topic "access control system" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


321

Control system and method for payload control in mobile platform cranes  

DOE Patents (OSTI)

A crane control system and method provides a way to generate crane commands responsive to a desired payload motion to achieve substantially pendulation-free actual payload motion. The control system and method apply a motion compensator to maintain a payload in a defined payload configuration relative to an inertial coordinate frame. The control system and method can further comprise a pendulation damper controller to reduce an amount of pendulation between a sensed payload configuration and the defined payload configuration. The control system and method can further comprise a command shaping filter to filter out a residual payload pendulation frequency from the desired payload motion.

Robinett, III, Rush D. (Tijeras, NM); Groom, Kenneth N. (Albuquerque, NM); Feddema, John T. (Albuquerque, NM); Parker, Gordon G. (Houghton, MI)

2002-01-01T23:59:59.000Z

322

Pollution Control in a Manufacturing System Stochastic Models for Analysis and Control of Air Pollution  

E-Print Network (OSTI)

Pollution Control in a Manufacturing System Stochastic Models for Analysis and Control of Air models that can be used for controlling pollution in a manufacturing system. The models are developed. Introduction Pollution of air resulting from toxic wastes emitted by large manufacturing plants and power

Gosavi, Abhijit

323

Practical Issues in Formation Control of Multi-Robot Systems  

E-Print Network (OSTI)

for distributed control based on nominal agent models, and (2) robust tracking of reference trajectories under model uncertainties. Proposed is a two-layer hierarchical architecture for collectivemotion control ofmultirobot nonholonomic systems. It endows robotic...

Zhang, Junjie

2010-07-14T23:59:59.000Z

324

FRAMES-2.0 Software System: Providing Password Protection and Limited Access to Models and Simulations  

SciTech Connect

One of the most important concerns for regulatory agencies is the concept of reproducibility (i.e., reproducibility means credibility) of an assessment. One aspect of reproducibility deals with tampering of the assessment. In other words, when multiple groups are engaged in an assessment, it is important to lock down the problem that is to be solved and/or to restrict the models that are to be used to solve the problem. The objective of this effort is to provide the U.S. Nuclear Regulatory Commission (NRC) with a means to limit user access to models and to provide a mechanism to constrain the conceptual site models (CSMs) when appropriate. The purpose is to provide the user (i.e., NRC) with the ability to “lock down” the CSM (i.e., picture containing linked icons), restrict access to certain models, or both.

Whelan, Gene; Pelton, Mitch A.

2007-08-09T23:59:59.000Z

325

Reference Model for Control and Automation Systems in Electrical Power |  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Model for Control and Automation Systems in Electrical Model for Control and Automation Systems in Electrical Power Reference Model for Control and Automation Systems in Electrical Power Modern infrastructure automation systems are threatened by cyber attack. Their higher visibility in recent years and the increasing use of modern information technology (IT) components contribute to increased security risk. A means of analyzing these infrastructure automation systems is needed to help understand and study the many system relationships that affect the overall security of the system. Modeling these systems is a very cost effective means of addressing the problem of security from an overall system view. The model presented in the document below provides a structured, cost effective approach to address technical security in process control systems

326

Preliminary Study Using ForwardPreliminary Study Using Forward Reaction Control System JetsReaction Control System Jets  

E-Print Network (OSTI)

Preliminary Study Using ForwardPreliminary Study Using Forward Reaction Control System JetsReaction Control System Jets During Space Shuttle EntryDuring Space Shuttle Entry Carolina Restrepo Currently the shuttle uses only aft RCS jets for yaw control during entry Enough to handle present flight

Valasek, John

327

Control of Microfluidic Systems: Two Examples, Results, and Challenges  

E-Print Network (OSTI)

1 Control of Microfluidic Systems: Two Examples, Results, and Challenges Micheal Armani, Satej results and challenges in feedback control of microfluidic systems. Results are provided for two Integration of Micro- and Nano-Scale Systems' organized by the author. 2. Introduction Microfluidics refers

Shapiro, Benjamin

328

Review of Supervisory Control and Data Acquisition (SCADA) Systems  

SciTech Connect

A review using open source information was performed to obtain data related to Supervisory Control and Data Acquisition (SCADA) systems used to supervise and control domestic electric power generation, transmission, and distribution. This report provides the technical details for the types of systems used, system disposal, cyber and physical security measures, network connections, and a gap analysis of SCADA security holes.

Reva Nickelson; Briam Johnson; Ken Barnes

2004-01-01T23:59:59.000Z

329

Remote-Controlled Home Automation Systems with Different Network Technologies  

E-Print Network (OSTI)

Remote-Controlled Home Automation Systems with Different Network Technologies Armando Roy Delgado into the potential for remote controlled operation of home automation systems. It considers problems, 2002) which certainly requires a careful study before developing any suitable Home Automation System

Grout, Vic

330

BEHAVIOR PREDICTION FOR DECISION AND CONTROL IN COGNITIVE AUTONOMOUS SYSTEMS  

E-Print Network (OSTI)

BEHAVIOR PREDICTION FOR DECISION AND CONTROL IN COGNITIVE AUTONOMOUS SYSTEMS ASOK RAY*, SHASHI for decision and control in cognitive autonomous systems. The objective is to coordinate human­machine collaboration such that human operators can assess and enable autonomous systems to utilize their experi- ential

Ray, Asok

331

AN OPERATOR EXPERIENCE WITH A HIERARCHICAL REALTIME CONTROL SYSTEM (RCS)  

E-Print Network (OSTI)

AN OPERATOR EXPERIENCE WITH A HIERARCHICAL REAL­TIME CONTROL SYSTEM (RCS) Hui­Min Huang Mechanical@cme.nist.gov ABSTRACT The issue of operator interface in the RCS hierarchical control systems is the focus operators to be involved in system operations in different degrees. In some situations, the operators

332

Retrofit Diesel Emissions Control System Providing 50% NOxControl  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

B. Berry, T. Caron, J. Cizeron, T. Kinney, K. Lundberg and R. Dalla Betta Catalytica Energy Systems, Inc. The preparation of this poster is based on work funded in part by the...

333

Help for the Developers of Control System Cyber Security Standards  

SciTech Connect

A Catalog of Control Systems Security: Recommendations for Standards Developers (Catalog), aimed at assisting organizations to facilitate the development and implementation of control system cyber security standards, has been developed. This catalog contains requirements that can help protect control systems from cyber attacks and can be applied to the Critical Infrastructures and Key Resources of the United States and other nations. The requirements contained in the catalog are a compilation of practices or various industry bodies used to increase the security of control systems from both physical and cyber attacks. They should be viewed as a collection of recommendations to be considered and judiciously employed, as appropriate, when reviewing and developing cyber security standards for control systems. The recommendations in the Catalog are intended to be broad enough to provide any industry using control systems the flexibility needed to develop sound cyber security standards specific to their individual security requirements.

Robert P. Evans

2008-05-01T23:59:59.000Z

334

Control and optimization system and method for chemical looping processes  

DOE Patents (OSTI)

A control system for optimizing a chemical loop system includes one or more sensors for measuring one or more parameters in a chemical loop. The sensors are disposed on or in a conduit positioned in the chemical loop. The sensors generate one or more data signals representative of an amount of solids in the conduit. The control system includes a data acquisition system in communication with the sensors and a controller in communication with the data acquisition system. The data acquisition system receives the data signals and the controller generates the control signals. The controller is in communication with one or more valves positioned in the chemical loop. The valves are configured to regulate a flow of the solids through the chemical loop.

Lou, Xinsheng; Joshi, Abhinaya; Lei, Hao

2014-06-24T23:59:59.000Z

335

Mitigations for Security Vulnerabilities Found in Control System Networks |  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Mitigations for Security Vulnerabilities Found in Control System Mitigations for Security Vulnerabilities Found in Control System Networks Mitigations for Security Vulnerabilities Found in Control System Networks Industry is aware of the need for Control System (CS) security, but in on-site assessments, Idaho National Laboratory (INL) has observed that security procedures and devices are not consistently and effectively implemented. The Department of Homeland Security (DHS), National Cyber Security Division (NCSD), established the Control Systems Security Center (CSSC) at INL to help industry and government improve the security of the CSs used in the nation's critical infrastructures. One of the main CSSC objectives is to identify control system vulnerabilities and develop effective mitigations for them. This paper discusses common problems and vulnerabilities seen in

336

Engine control system having speed-based timing  

DOE Patents (OSTI)

A control system for an engine having a cylinder is disclosed having an engine valve movable to regulate a fluid flow of the cylinder and an actuator associated with the engine valve. The control system also has a controller in communication with the actuator. The controller is configured to receive a signal indicative of engine speed and compare the engine speed signal with a desired engine speed. The controller is also configured to selectively regulate the actuator to adjust a timing of the engine valve to control an amount of air/fuel mixture delivered to the cylinder based on the comparison.

Willi, Martin L. (Dunlap, IL); Fiveland, Scott B. (Metamora, IL); Montgomery, David T. (Edelstein, IL); Gong, Weidong (Dunlap, IL)

2012-02-14T23:59:59.000Z

337

Critical issues in process control system security : DHS spares project.  

SciTech Connect

The goals of this event are: (1) Discuss the next-generation issues and emerging risks in cyber security for control systems; (2) Review and discuss common control system architectures; (3) Discuss the role of policy, standards, and supply chain issues; (4) Interact to determine the most pertinent risks and most critical areas of the architecture; and (5) Merge feedback from Control System Managers, Engineers, IT, and Auditors.

Hernandez, Jacquelynne; McIntyre, Annie; Henrie, Morgan

2010-10-01T23:59:59.000Z

338

HVDC control system based on parallel digital signal processors  

SciTech Connect

A numerical HVDC control system operating in real time has been developed for a simulator to be used for operator training. The control system, implemented with digital signal processors (DSPs), consists of typical HVDC control functions such as the synchronizing unit, the regulation unit, the protection unit, the firing unit, the tap changer and the reactive power regulation unit. Results from the steady-state and the transient performance validation tests carried out on the IREQ power system simulator are provided.

Maharsi, Y.; Do, V.Q.; Sood, V.K.; Casoria, S.; Belanger, J. [Hydro-Quebec, Varennes, Quebec (Canada)] [Hydro-Quebec, Varennes, Quebec (Canada)

1995-05-01T23:59:59.000Z

339

Development of an NC equipment level controller in a hierarchical shop floor control system  

E-Print Network (OSTI)

The methodology of developing an NC equipment controller in a Computer Integrated Manufacturing (CIM) System, which is based on a philosophy of hierarchical shop floor control, is presented in this research. The underlying architecture consists...

Chang, William

2012-06-07T23:59:59.000Z

340

24th Benelux Meeting Systems and Control  

E-Print Network (OSTI)

applied on a half-car test rig.30­14.55 Contribution to the control of a rotary cement kiln - A simu- lation . . . . . . . . . . . . . . . . . . . . . . . . . . .

Serdijn, Wouter A.

Note: This page contains sample records for the topic "access control system" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


341

Application of multi-variable control for automatic frequency controller of HVDC transmission system  

SciTech Connect

In an HVDC transmission system that links two ac power systems, the automatic frequency controller (AFC) calculates power to be interchanged between the two ac systems according to their frequencies thereby improving the frequency characteristics of the two power systems. This paper introduces a newly developed dc AFC system, which applies a multi-variable control to the dc system-based frequency control. It is capable of controlling the frequencies of the two ac systems optimally while maintaining their stability. This system was developed for one of Japan's HVDC transmission facilities and produced good results in a combined test using a power system simulator. The field installation will be completed in March 1993, when the AFC system will enter service.

Sanpei, Masatoshi (Electric Power Development Co., Tokyo (Japan)); Kakehi, Atsuyuki; Takeda, Hideo (Toshiba Corp., Tokyo (Japan))

1994-04-01T23:59:59.000Z

342

Recommended Practice for Securing Control System Modems | Department of  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Practice for Securing Control System Modems Practice for Securing Control System Modems Recommended Practice for Securing Control System Modems This paper addresses an often overlooked "backdoor" into critical infrastructure control systems created by modem connections. A modem's connection to the public telephone system is similar to a corporate network connection to the Internet. By tracing typical attack paths into the system, this paper provides the reader with an analysis of the problem and then guides the reader through methods to evaluate existing modem security. Following the analysis, a series of methods for securing modems is provided. These methods are correlated to well-known networking security methods. Recommended Practice for Securing Control System Modems More Documents & Publications

343

Dual fuel engine control systems for transportation applications  

SciTech Connect

Microprocessor control systems have been developed for dual fuel diesel engines intended for transportation applications. Control system requirements for transportation engines are more demanding than for stationary engines, as the system must be able to cope with variable speed and load. Detailed fuel maps were determined for both normally aspirated and turbocharged diesel engines based on the criterion that the engine did not operate in the regimes where knock or incomplete combustion occurred. The control system was developed so that the engine would follow the detailed fuel map. The input variables to the control system are engine speed and load. Based on this, the system then controls the amount of natural gas and diesel fuel supplied to the engine. The performance of the system is briefly summarized.

Gettel, L.E.; Perry, G.C.; Boisvert, J.; O'Sullivan, P.J.

1987-10-01T23:59:59.000Z

344

Problems of control and stabilization of impulsive-control dynamic systems with application to nonholonomic mechanics  

Science Journals Connector (OSTI)

Consideration was given to the control systems using impulses as admissible actions. For impulses of different orders and degrees, these systems can be reduced to a form accepted in the current theory of impulsive systems. The problems of control and ... Keywords: 02.30.Yy, 45.80.+r

A. M. Kovalev; N. V. Kravchenko; V. N. Nespirnyi

2007-08-01T23:59:59.000Z

345

A Summary of Control System Security Standards Activities in...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

sector standards, guidelines, and technical reports, demonstrating standards coverage by security topic. This work focuses on control systems standards applicable to the energy...

346

Design, fabrication, and characterization of controllable conducting polymer actuation systems  

E-Print Network (OSTI)

The geometric, hierarchal, multifunctional composition of mammalian skeletal muscle and the neuromuscular system consists of actuation elements, length sensors, force sensors, localized energy storage, controlled energy ...

Paster, Eli (Eli Travis)

2010-01-01T23:59:59.000Z

347

Optimal Control of Harvesting Ice Thermal Storage Systems  

E-Print Network (OSTI)

for optimal control of a harvesting ice storage system. A simplified procedure is used to develop 24 hour load data. Example installations will be shown....

Knebel, D. E.

1988-01-01T23:59:59.000Z

348

Set point optimization of controlled Organic Rankine Cycle systems  

Science Journals Connector (OSTI)

In this paper, an approach to optimize set points is proposed for controlled Organic Rankine Cycle (ORC) systems. Owing to both disturbances...

Jianhua Zhang; Mingming Lin; Fei Shi; Jia Meng; Jinliang Xu

2014-11-01T23:59:59.000Z

349

Modeling, Estimation, and Control of Waste Heat Recovery Systems  

E-Print Network (OSTI)

for Open Organic Rankine Cycle (ORC)138 Evaporatorand Simulation of an Organic Rankine Cycle (ORC) System forControl of Organic Rankine Cycles in Waste Heat Uti- lizing

Luong, David

2013-01-01T23:59:59.000Z

350

Tank Monitoring and Control System (TMACS) Acceptance Test Procedure  

SciTech Connect

This document is used to validate Revision 13.0 of the Tank Monitor and Control System (TMACS) and verify it functions as intended by design.

BARNES, D.A.

2000-12-14T23:59:59.000Z

351

Performance of Johnson Matthey EGRT? Emission Control System...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Performance of Johnson Matthey EGRT Emission Control System for NOx and PM Emission Reduction in Retrofit Applications Part 1 Performance of Johnson Matthey EGRT Emission...

352

Performance of Johnson Matthey EGRT? Emission Control System...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

* Doug Emig Emigd@JMUSA.com * Sougato Chatterjee Chatterjee@JMUSA.com * WWW.JMCSD.COM Johnson Matthey Diesel Emission Control Systems 380 Lapp Road Malvern, PA 19355...

353

Performance of Johnson Matthey EGRT? Emission Control System...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

2 Performance of Johnson Matthey EGRT Emission Control System for NOx and PM Emission Reduction in Retrofit Applications Part 2 2002 DEER Conference Presentation: Johnson Matthey...

354

Commissioning and Performance Diagnostics for HVAC Control Systems  

NLE Websites -- All DOE Office Websites (Extended Search)

Commissioning and Performance Diagnostics for HVAC Control Systems Commissioning and Performance Diagnostics for HVAC Control Systems Speaker(s): Ashish Singhal Date: December 20, 2006 - 12:00pm Location: 90-3122 Seminar Host/Point of Contact: Philip Haves The presentation will focus on practical aspects of commissioning control loops in commercial HVAC systems and evaluating their routine performance. Simple and theoretically sound methods for diagnosing control performance will be presented that detect serious performance issues associated with control loops in modern buildings. The discussion will center on a new control loop commissioning tool that helps field personnel to quickly test, tune and troubleshoot control loops. In addition to the active tests for commissioning control loops, a suite of diagnostic algorithms are used in a

355

Comparative controller design for a marine gas turbine propulsion system  

SciTech Connect

Controller design for marine gas turbine systems should consider three measures of performance: transient control, steady-state accuracy, and disturbance rejection. This paper presents and compares two common types of controller design in terms of these measures. The goal of the controllers was shaft speed control. To meet this goal, a classical proportional-plus-integral controller was designed and compared to a modern linear quadratic regulator design. The controllers' performances were evaluated with respect to the three measures mentioned above, with disturbances being input as oscillations in shaft torque due to seaway cycling.

Smith, D.L.; Stammetti, V.A. (Naval Postgraduate School, Monterey, CA (USA). Dept. of Mechanical Engineering)

1990-04-01T23:59:59.000Z

356

Cyber vulnerability in power systems operation and control  

Science Journals Connector (OSTI)

Modern power systems are composed of several interacting national systems synchronously or asynchronously interconnected over large geographic areas, and in the European case on a continental basis. In each country several areas are put under the control ...

Ettore Bompard; Paolo Cuccia; Marcelo Masera; Igor Nai Fovino

2012-01-01T23:59:59.000Z

357

Experimental Automatic Lateral Control System For An Automobile  

E-Print Network (OSTI)

Control System for an Automobile Huei Peng, Wei-Bin Zhang,system for a full scaled automobile. Previous PATH programsystem for steering on an automobile. Due to their mutual

1992-01-01T23:59:59.000Z

358

Intelligent-controlled doubly fed induction generator system using PFNN  

Science Journals Connector (OSTI)

An intelligent-controlled doubly fed induction generator (DFIG) system using probabilistic fuzzy neural network ( ... the transient and steady-state responses of the DFIG system at different operating conditions....

Faa-Jeng Lin; Yi-Sheng Huang; Kuang-Hsiung Tan…

2013-06-01T23:59:59.000Z

359

Software Quality Assurance Control of Existing Systems | Department of  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Software Quality Assurance Control of Existing Systems Software Quality Assurance Control of Existing Systems Software Quality Assurance Control of Existing Systems Existing software systems often represent significant investments and play important roles in the every day businesses of organizations. To meet current and future operational needs, organizations need to plan how best to address these support issues. Some of the issues to consider are presented in this document with references to related standards for further detailed examination. Two tutorials, one based on software maintenance and another detailing a baseline recovery strategy are included Software Quality Assurance Control of Existing Systems More Documents & Publications Software Quality Assurance Control of Existing Systems Software Quality: A Guide to Responsibilities and Resources, SQAS

360

Software Quality Assurance Control of Existing Systems | Department of  

NLE Websites -- All DOE Office Websites (Extended Search)

Assurance Control of Existing Systems Assurance Control of Existing Systems Software Quality Assurance Control of Existing Systems Existing software systems often represent significant investments and play important roles in the every day businesses of organizations. To meet current and future operational needs, organizations need to plan how best to address these support issues. Some of the issues to consider are presented in this document with references to related standards for further detailed examination. Two tutorials, one based on software maintenance and another detailing a baseline recovery strategy are included Software Quality Assurance Control of Existing Systems More Documents & Publications Software Quality Assurance Control of Existing Systems Software Quality: A Guide to Responsibilities and Resources, SQAS

Note: This page contains sample records for the topic "access control system" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


361

Hierarchical predictive control of integrated wastewater treatment systems  

Science Journals Connector (OSTI)

The paper proposes an approach to designing the control structure and algorithms for optimising control of integrated wastewater treatment plant-sewer systems (IWWTS) under a full range of disturbance inputs. The optimised control of IWWTS allows for significant cost savings, fulfilling the effluent discharge limits over a long period and maintaining the system in sustainable operation. Due to the specific features of a wastewater system a hierarchical control structure is applied. The functional decomposition leads to three control layers: supervisory, optimising and follow-up. A temporal decomposition that is applied in order to efficiently accommodate the system's multiple time scales leads to further decomposition of the optimising control layer into three control sublayers: slow, medium, and fast. An extended Kalman Filter is used to carry out an estimation of needed but not measured plant states in real time. The robustly feasible model predictive controller produces manipulated variable trajectories based on a dedicated grey box (GB) model of the biological processes and drawing its physical reality from the well known \\{ASM2d\\} model. The GB model parameters are dependant on the plant operating point and therefore are continuously estimated. As it is impossible to efficiently control the plant under all influent conditions that may occur by using one universal control strategy, different control strategies are designed. Recently developed mechanisms for soft switching between the MPC control strategies are applied in order to smooth the state and control transient processes during the switching. The methodologies and algorithms proposed in the paper are validated by simulation based on real data records from a wastewater system located in Kartuzy, northern Poland. The control system was implemented at the case-study site to generate in real time the control actions that were assessed by the plant operators and verified by simulation based on a calibrated plant model.

M.A. Brdys; M. Grochowski; T. Gminski; K. Konarczak; M. Drewa

2008-01-01T23:59:59.000Z

362

THE DISTRIBUTED SPACECRAFT ATTITUDE CONTROL SYSTEM SIMULATOR  

E-Print Network (OSTI)

algorithms are being developed and tested on DSACSS, combining momentum/reaction wheel, control moment gyro a similar purpose -- ball-and-socket joints, for example -- but air bearings yield much lower friction

Hall, Christopher D.

363

Robust control of redundantly actuated dynamical systems  

E-Print Network (OSTI)

of redundant actuation proving the inherent robustness in the control design methodology. A choice of close loop eigenvector set to minimize the feedback gain matrix is suggested. Partial Eigenstructure Assignment methodology is proposed for second order...

Majji, Manoranjan

2006-08-16T23:59:59.000Z

364

Development of a coal cleaning control system  

SciTech Connect

The US Department of Energy selected the Battelle-Electric Power Research Institute-Science Applications International Corporation team to evaluate and develop on-line slurry ash, percent solids, and sulfur analysis instrumentation and process control technology. The project's objectives were (1) to develop an accurate, versatile, easy to use, on-line coal slurry analyzer and (2) to develop control strategies for analysis, control, and optimization of advanced and conventional coal-cleaning plant. The project's scope included (1) the installation of a slurry test loop, ash, percent solids, and sulfur instruments; (2) evaluation of instrument accuracy with various coals, under various slurry conditions; and (3) assessment of the cost and benefits to be derived from on-line analysis and control 12 refs., 40 figs., 16 tabs.

Conkle, H.N.; Barnes, R.H.; Orban, J.E.; Webb, P.R.

1990-03-09T23:59:59.000Z

365

IPNS Chopper Control and Accelerator Interface Systems  

SciTech Connect

Several of the instruments at the Intense Pulsed Neutron Source (IPNS) at Argonne use rotating Fermi choppers. The techniques used to control the speed and phase of these rotating devices are discussed.

Ostrowski, G.E.; Donley, L.I.; Rauchas, A.V.; Volk, G.J.; Jung, E.A.; Haumann, J.R.; Pelizzari, C.A.

1985-01-01T23:59:59.000Z

366

RPP Computer Automated Surveillance System (CASS) to Tank Monitor and Control System (TMACS) transfer project plan  

SciTech Connect

Management plan to ensure the orderly, systematic transfer of alarms from the retired Computer Automated Surveillance System (CASS) to the Tank Monitor and Control System (TMACS).

SHIPLER, C.E.

1999-07-13T23:59:59.000Z

367

On Cyber Security for Networked Control Systems  

E-Print Network (OSTI)

infrastructure systems in the analysis of safety and stability - a significant contribution to the theory of hybrid

Amin, Saurabh

2011-01-01T23:59:59.000Z

368

Distributed Predictive Control and Estimation for Systems with Information  

E-Print Network (OSTI)

constraints and a stationary LQG (Linear Quadratic Gaussian) control law is presented based on the model control and estimation law is demonstrated through a numerical simulation of smart grid. KeywordsDistributed Predictive Control and Estimation for Systems with Information Structures Exemplified

369

ARCHITECTURE AND MAIN HARDWARE COMPONENTS OF THE FEL CONTROL SYSTEM  

E-Print Network (OSTI)

ARCHITECTURE AND MAIN HARDWARE COMPONENTS OF THE FEL CONTROL SYSTEM E.N. Dementiev, V.R. Kozak, E.V. Tararyshkin, A.G. Tribendis, E.N. Shubin, Abstract This article considers the architecture of the control architecture depended on several factors specific to both the facility itself and the control equipment used

Kozak, Victor R.

370

Evolution paths of a general control system  

SciTech Connect

Large systems are built by teams of people who communicate through a set of design tools to produce an information model which describes the system. The model can be analyzed for consistency and completeness. A system building methodology based upon this information model can be used for the construction, operation, and maintenance of the system. Operational procedure knowledge derived from operating experience can be used for autonomous operation. Advancing computer technology is improving the engineering tools available in each of these areas. A unified set of such tools provides the maximum amount of computer assistance to the system builders.

Speckert, G.C.

1983-01-01T23:59:59.000Z

371

Remotely controlled sensor apparatus for use in dig-face characterization system  

DOE Patents (OSTI)

A remotely controlled sensor platform apparatus useful in a dig-face characterization system is deployed from a mobile delivery device such as standard heavy construction equipment. The sensor apparatus is designed to stabilize sensors against extraneous motions induced by heavy equipment manipulations or other outside influences, and includes a terrain sensing and sensor elevation control system to maintain the sensors in close ground proximity. The deployed sensor apparatus is particularly useful in collecting data in work environments where human access is difficult due to the presence of hazardous conditions, rough terrain, or other circumstances that prevent efficient data collection by conventional methods. Such work environments include hazardous waste sites, unexploded ordnance sites, or construction sites. Data collection in these environments by utilizing the deployed sensor apparatus is desirable in order to protect human health and safety, or to assist in planning daily operations to increase efficiency.

Josten, Nicholas E. (Idaho Falls, ID); Svoboda, John M. (Idaho Falls, ID)

1999-01-01T23:59:59.000Z

372

Remotely controlled sensor apparatus for use in dig-face characterization system  

DOE Patents (OSTI)

A remotely controlled sensor platform apparatus useful in a dig-face characterization system is deployed from a mobile delivery device such as standard heavy construction equipment. The sensor apparatus is designed to stabilize sensors against extraneous motions induced by heavy equipment manipulations or other outside influences, and includes a terrain sensing and sensor elevation control system to maintain the sensors in close ground proximity. The deployed sensor apparatus is particularly useful in collecting data in work environments where human access is difficult due to the presence of hazardous conditions, rough terrain, or other circumstances that prevent efficient data collection by conventional methods. Such work environments include hazardous waste sites, unexploded ordnance sites, or construction sites. Data collection in these environments by utilizing the deployed sensor apparatus is desirable in order to protect human health and safety, or to assist in planning daily operations to increase efficiency. 13 figs.

Josten, N.E.; Svoboda, J.M.

1999-05-25T23:59:59.000Z

373

Maximum power tracking control scheme for wind generator systems  

E-Print Network (OSTI)

The purpose of this work is to develop a maximum power tracking control strategy for variable speed wind turbine systems. Modern wind turbine control systems are slow, and they depend on the design parameters of the turbine and use wind and/or rotor...

Mena, Hugo Eduardo

2009-05-15T23:59:59.000Z

374

Maximum power tracking control scheme for wind generator systems  

E-Print Network (OSTI)

The purpose of this work is to develop a maximum power tracking control strategy for variable speed wind turbine systems. Modern wind turbine control systems are slow, and they depend on the design parameters of the turbine and use wind and/or rotor...

Mena Lopez, Hugo Eduardo

2008-10-10T23:59:59.000Z

375

New trends of visualization in smart production control systems  

Science Journals Connector (OSTI)

The paper reports on first experiences with modern web-based technologies used in building the human-machine interfaces for the industrial automation applications. It mainly focuses on distributed and intelligent manufacturing control systems designed ... Keywords: AJAX, GWT, HTML5, distributed intelligent control, manufacturing, multi-agent systems, ontology, service-oriented architectures, visualization, web application

Pavel Vrba; Petr Kadera; Václav Jirkovský; Marek Obitko; Vladimír Ma?ík

2011-08-01T23:59:59.000Z

376

Generic planning and control of automated material handling systems  

Science Journals Connector (OSTI)

This paper discusses the problem to design a generic planning and control architecture for automated material handling systems (AMHSs). We illustrate the relevance of this research direction, and then address three different market sectors where AMHSs ... Keywords: Automated material handling systems, Generic control architecture, Real-time scheduling

S. W. A. Haneyah; J. M. J. Schutten; P. C. Schuur; W. H. M. Zijm

2013-04-01T23:59:59.000Z

377

Deception used for Cyber Defense of Control Systems  

SciTech Connect

Control system cyber security defense mechanisms may employ deception to make it more difficult for attackers to plan and execute successful attacks. These deceptive defense mechanisms are organized and initially explored according to a specific deception taxonomy and the seven abstract dimensions of security previously proposed as a framework for the cyber security of control systems.

Wayne F. Boyer; Miles A. McQueen

2009-05-01T23:59:59.000Z

378

Controllers with Minimal Observation Power (Application to Timed Systems)  

E-Print Network (OSTI)

Controllers with Minimal Observation Power (Application to Timed Systems) Peter Bulychev1 , Franck is the computation of a subset of predicates sufficient for control and whose cost is minimal. Our solution avoids, Danish-Chinese Center for Cyber Physical Systems (IDEA4CPS) and VKR Center of Excellence MT-LAB. #12;The

David, Alexandre

379

Research challenges for the security of control systems  

Science Journals Connector (OSTI)

In this paper we attempt to answer two questions: (1) Why should we be interested in the security of control systems? And (2) What are the new and fundamentally different requirements and problems for the security of control systems? We also propose ...

Alvaro A. Cárdenas; Saurabh Amin; Shankar Sastry

2008-07-01T23:59:59.000Z

380

THE SNS CRYOGENIC CONTROL SYSTEM: EXPERIENCES IN COLLABORATION [1  

E-Print Network (OSTI)

WEAP013 THE SNS CRYOGENIC CONTROL SYSTEM: EXPERIENCES IN COLLABORATION [1] W. H. Strong, P. A. Gurd Abstract The cryogenic system for the Spallation Neutron Source (SNS) is designed by Jefferson Laboratory, and software tools. The cryogenic system is the first SNS system to be developed using SNS standards

Note: This page contains sample records for the topic "access control system" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


381

Hydrazine engine start system air start performance and controls sizing  

SciTech Connect

Hydrazine has been used as an energy source in many applications to fuel in-flight main engine starting. In a current application, an existing hydrazine engine start system (ESS) design was adapted to meet new fuel control requirements. This paper presents a brief system description, historical context, and the motivating factors for the hydrazine controls changes and three case studies of controls design and analysis from the ESS program. 4 refs.

Johnson, A.T.

1992-01-01T23:59:59.000Z

382

High performance control of harmonic instability from HVDC link system  

SciTech Connect

This paper investigates the usefulness of novel control method for HVDC link system which suffers from severe condition of low order harmonic. This control scheme is used the feedforward control method which is directly controlled dc current at dc link system. The studies of this paper are aimed to improving the dynamic response of HVdc link system in disturbances such as faults. To achieve those objectives, digital time domain simulations are employed by the electro magnetic transient program for dc system (EMTDC). This method results in stable recovery from faults at both rectifier and inverter terminal busbars for a HVdc system that is inherently unstable. It has been found to be robust and control performance has been enhanced.

Min, W.K.; Yoo, M.H. [Korea Electric Power Research Inst., Taejeon (Korea, Republic of)

1995-12-31T23:59:59.000Z

383

LANSCE Drift Tube Linac Water Control System Refurbishment  

SciTech Connect

There are several refurbishment projects underway at the Los Alamos National Laboratory LANSCE linear accelerator. Systems involved are: RF, water cooling, networks, diagnostics, timing, controls, etc. The Drift Tube Linac (DTL) portion of the accelerator consists of four DTL tanks, each with three independent water control systems. The systems are about 40 years old, use outdated and non-replaceable equipment and NIM bin control modules, are beyond their design life and provide unstable temperature control. Insufficient instrumentation and documentation further complicate efforts at maintaining system performance. Detailed design of the replacement cooling systems is currently in progress. Previous design experience on the SNS accelerator water cooling systems will be leveraged, see the SNS DTL FDR. Plans call for replacement of water piping, manifolds, pumps, valves, mix tanks, instrumentation (flow, pressure and temperature) and control system hardware and software. This presentation will focus on the control system design with specific attention on planned use of the National Instruments Compact RIO platform with the Experimental Physics and Industrial Control system (EPICS) software toolkit.

Marroquin, Pilar S. [Los Alamos National Laboratory

2011-01-01T23:59:59.000Z

384

The Los Alamos VXI-based modular RF control system  

SciTech Connect

This paper describes the design and implementation of the Los Alamos modular RF control system, which provides high-performance feedback and/or feedforward control of RF accelerator cavities. This is a flexible, modular control system which has been realized in the industry-standard VXI cardmodular format. A wide spectrum of system functionality can be accommodated simply by incorporating only those modules and features required for a particular application. The fundamental principles of the design approach are discussed. Details of the VXI implementation are given, including the system architecture and interfaces, performance capabilities, and available features.

Jachim, S.P.; Ziomek, C.; Natter, E.F.; Regan, A.H.; Hill, J.; Eaton, L.; Gutscher, W.D.; Curtin, M.; Denney, P.; Hansberry, E.; Brooks, T.

1993-01-01T23:59:59.000Z

385

The Los Alamos VXI-based modular RF control system  

SciTech Connect

This paper describes the design and implementation of the Los Alamos modular RF control system, which provides high-performance feedback and/or feedforward control of RF accelerator cavities. This is a flexible, modular control system which has been realized in the industry-standard VXI cardmodular format. A wide spectrum of system functionality can be accommodated simply by incorporating only those modules and features required for a particular application. The fundamental principles of the design approach are discussed. Details of the VXI implementation are given, including the system architecture and interfaces, performance capabilities, and available features.

Jachim, S.P.; Ziomek, C.; Natter, E.F.; Regan, A.H.; Hill, J.; Eaton, L.; Gutscher, W.D.; Curtin, M.; Denney, P.; Hansberry, E.; Brooks, T.

1993-06-01T23:59:59.000Z

386

Closed-loop focus control system for laser welding  

SciTech Connect

In this paper the authors describe a focus control system for Nd:YAG laser welding based on an optical sensor incorporated into the fibre delivery system to detect light generated by the process. This broadband light is separated into two wavelength bands, and simple electronic processing gives a signal proportional to focal error, as a result of chromatic aberrations in the optical delivery system. Focus control is demonstrated for bead-on-plate welds in different thicknesses of titanium alloy, aluminum alloy, mild steel and stainless steel. The control system works for both pulsed and continuous laser radiation.

Haran, F.M.; Hand, D.P.; Jones, J.D.C. [Heriot-Watt Univ., Edinburgh (United Kingdom); Peters, C. [Lumonics Ltd., Rugby (United Kingdom)

1996-12-31T23:59:59.000Z

387

Integrated intelligent systems in advanced reactor control rooms  

SciTech Connect

An intelligent, reactor control room, information system is designed to be an integral part of an advanced control room and will assist the reactor operator's decision making process by continuously monitoring the current plant state and providing recommended operator actions to improve that state. This intelligent system is an integral part of, as well as an extension to, the plant protection and control systems. This paper describes the interaction of several functional components (intelligent information data display, technical specifications monitoring, and dynamic procedures) of the overall system and the artificial intelligence laboratory environment assembled for testing the prototype. 10 refs., 5 figs.

Beckmeyer, R.R.

1989-01-01T23:59:59.000Z

388

In-situ control system for atomization  

DOE Patents (OSTI)

Melt atomizing apparatus comprising a melt supply orifice for supplying the melt for atomization and gas supply orifices proximate the melt supply orifice for supplying atomizing gas to atomize the melt as an atomization spray. The apparatus includes a sensor, such as an optical and/or audio sensor, for providing atomization spray data, and a control unit responsive to the sensed atomization spray data for controlling at least one of the atomizing gas pressure and an actuator to adjust the relative position of the gas supply orifice and melt supply in a manner to achieve a desired atomization spray.

Anderson, Iver E. (Ames, IA); Figliola, Richard S. (Central, SC); Terpstra, Robert L. (Ames, IA)

1995-06-13T23:59:59.000Z

389

COMMON VULNERABILITIES IN CRITICAL INFRASTRUCTURE CONTROL SYSTEMS  

NLE Websites -- All DOE Office Websites (Extended Search)

enforcement and auditing. Page 114 SECURITY POLICY Figure 1. PCS administration. A security plan documents the overall security architecture for a system or subsystem. Typical...

390

Particulate Emissions Control by Advanced Filtration Systems...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Advanced Filtration Systems for GDI Engines (ANLCorningHyundai CRADA) June 19, 2014 DOE Annual Merit Review & Peer Evaluation Meeting PI: Kyeong Lee Co-investigators: Seung Choi,...

391

Towards I/O analysis of HPC systems and a generic architecture to collect access patterns  

Science Journals Connector (OSTI)

In high-performance computing applications, a high-level I/O call will trigger activities on a multitude of hardware components. These are massively parallel systems supported by huge storage systems and inter...

Marc C. Wiedemann; Julian M. Kunkel…

2013-05-01T23:59:59.000Z

392

Control Engineering Practice 12 (2004) 987988 Emerging technologies for active noise and vibration control systems  

E-Print Network (OSTI)

and vibration control systems Noise and vibration are often limiting factors in performance of many industrial be of little use at lower frequencies. Active noise and vibration control (ANVC) systems have emerged as viable-dimensional enclosure. One of the panels of the enclosure is vibrated, hence generating acoustic noise inside

Pota, Himanshu Roy

393

Efficient memory control for avionics and embedded systems  

Science Journals Connector (OSTI)

Modern aircrafts have seen a significant growth of avionics systems. Most of new aircrafts have systems for navigation, automatic flight control, collision avoidance systems, flight data recorder, weather radar system as well as communication and monitoring systems. All of these systems use embedded computer systems with increasing memory requirements. In order to reduce the electricity consumed by these systems, we suggest detecting the portion of the computer memory that is actually used. The other portion can be temporarily shut down and turned on again when needed. Such a shut down can notably reduce the electricity consumption of the avionics systems.

Pinchas Weisberg; Yair Wiseman

2013-01-01T23:59:59.000Z

394

DOE and Industry Showcase New Control Systems Security Technologies at  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Technology Development » Energy Delivery Systems Technology Development » Energy Delivery Systems Cybersecurity » Control Systems Security News Archive » DOE and Industry Showcase New Control Systems Security Technologies at DistribuTECH DOE and Industry Showcase New Control Systems Security Technologies at DistribuTECH DistribuTECH Conference Tuesday-Thursday, March 23-25, 2010 Tampa Convention Center Booth #231 Tampa, FL Join the Department of Energy and its industry partners as they showcase six new products and technologies designed to secure the nation's energy infrastructure from cyber attack on Tuesday through Thursday, March 23-25. Visit Booth #231 at the DistribuTECH 2010 Conference & Exhibition in Tampa, FL, to see first-hand demonstrations of several newly commercialized control systems security products-each developed through a

395

Energy-Efficient Building HVAC Control Using Hybrid System LBMPC  

E-Print Network (OSTI)

Improving the energy-efficiency of heating, ventilation, and air-conditioning (HVAC) systems has the potential to realize large economic and societal benefits. This paper concerns the system identification of a hybrid system model of a building-wide HVAC system and its subsequent control using a hybrid system formulation of learning-based model predictive control (LBMPC). Here, the learning refers to model updates to the hybrid system model that incorporate the heating effects due to occupancy, solar effects, outside air temperature (OAT), and equipment, in addition to integrator dynamics inherently present in low-level control. Though we make significant modeling simplifications, our corresponding controller that uses this model is able to experimentally achieve a large reduction in energy usage without any degradations in occupant comfort. It is in this way that we justify the modeling simplifications that we have made. We conclude by presenting results from experiments on our building HVAC testbed, which s...

Aswani, Anil; Taneja, Jay; Krioukov, Andrew; Culler, David; Tomlin, Claire

2012-01-01T23:59:59.000Z

396

Process control monitoring systems, industrial plants, and process control monitoring methods  

DOE Patents (OSTI)

A system comprises a valve; a plurality of RFID sensor assemblies coupled to the valve to monitor a plurality of parameters associated with the valve; a control tag configured to wirelessly communicate with the respective tags that are coupled to the valve, the control tag being further configured to communicate with an RF reader; and an RF reader configured to selectively communicate with the control tag, the reader including an RF receiver. Other systems and methods are also provided.

Skorpik, James R [Kennewick, WA; Gosselin, Stephen R [Richland, WA; Harris, Joe C [Kennewick, WA

2010-09-07T23:59:59.000Z

397

One IBM Plant's Approach to Automated Control System Standards  

E-Print Network (OSTI)

ONE IBM PLANT'S APPROACH"TO AUTOMATED CONTROL SYSTEM STANDARDS John P. Cilia International Business Machines Corporation Poughkeepsie, New York ABSTRACT INSTRUMENTATION STANDARDS The trend toward lower cost of new technologies in building... Facilities Automation Control System (IPDFACS) standards used in the bidding process, the philosophy behind them, the type of instrumentation specified to be installed, and how to maintain this complex DDDC system. INTRODUCTION The lower cost of chips...

Cilia, J. P.

398

Advanced Burners and Combustion Controls for Industrial Heat Recovery Systems  

E-Print Network (OSTI)

ADVANCED BURNERS AND COMBUSTION CONTROLS FOR INDUSTRIAL HEAT RECOVERY SYSTEMS J.L.FERRI GTE PRODUCTS CORPORATION TOWANDA, PA ABSTRACT When recuperators are installed on indus trial furnaces, burners and ratio control systems must... recuperators by demonstrating their technical and economi cal feasibility in well monitored field installations (1). During the contract, it became evident to GTE that a systems approach (recuperator, burner, and con troIs) is necessary to be accepted...

Ferri, J. L.

399

System to control contamination during retrieval of buried TRU waste  

DOE Patents (OSTI)

A system to control contamination during the retrieval of hazardous waste comprising an outer containment building, an inner containment building, within the outer containment building, an electrostatic radioactive particle recovery unit connected to and in communication with the inner and outer containment buildings, and a contaminate suppression system including a moisture control subsystem, and a rapid monitoring system having the ability to monitor conditions in the inner and outer containment buildings.

Menkhaus, Daniel E. (Idaho Falls, ID); Loomis, Guy G. (Idaho Falls, ID); Mullen, Carlan K. (Idaho Falls, ID); Scott, Donald W. (Idaho Falls, ID); Feldman, Edgar M. (Idaho Falls, ID); Meyer, Leroy C. (Idaho Falls, ID)

1993-01-01T23:59:59.000Z

400

THE SNS VACUUM CONTROL SYSTEM UPGRADE FOR THE SUPERCONDUCTING LINAC  

SciTech Connect

The superconducting linac of the Spallation Neutron Source (SNS) has 23 cryomodules whose vacuum system is monitored and controlled by custom built hardware. The original control hardware was provided by Thomas Jefferson National Accelerator Facility (JLab) and contained a variety of custom boards utilizing integrated circuits to perform logic. The need for control logic changes, a desire to increase maintainability, and a desire to increase flexibility to adapt for the future has led to a Programmable Logic Controller (PLC) based upgrade. This paper provides an overview of the commercial off-the-shelf (COTS) hardware being used in the superconducting vacuum control system. Details of the design and challenges to convert a control system during small windows of maintenance periods without disrupting beam operation will be covered in this paper.

Williams, Derrick C [ORNL] [ORNL

2009-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "access control system" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


401

Building Automation and Controls Systems: Integrated Room Control for Personalized Comfort and Increased ROI  

E-Print Network (OSTI)

Smart Room Control ESL-IC-14-09-05 Proceedings of the 14th International Conference for Enhanced Building Operations, Beijing, China, September 14-17, 2014 Agenda ? Room Control fundamentals and evolution ? Challenges ? The Smart Room Control... approach ? Benefits ? Market applications ? Typical Configurations ? Summary ESL-IC-14-09-05 Proceedings of the 14th International Conference for Enhanced Building Operations, Beijing, China, September 14-17, 2014 Room ControlSystem Fundamentals ? HVAC...

Gill, D.

2014-01-01T23:59:59.000Z

402

Control system and method for a hybrid electric vehicle  

DOE Patents (OSTI)

A vehicle system controller (20) is presented for a LSR parallel hybrid electric vehicle having an engine (10), a motor (12), wheels (14), a transmission (16) and a battery (18). The vehicle system controller (20) has a state machine having a plurality of predefined states (22-32) that represent operating modes for the vehicle. A set of rules is defined for controlling the transition between any two states in the state machine. The states (22-32) are prioritized according to driver demands, energy management concerns and system fault occurrences. The vehicle system controller (20) controls the transitions from a lower priority state to a higher priority state based on the set of rules. In addition, the vehicle system controller (20) will control a transition to a lower state from a higher state when the conditions no longer warrant staying in the current state. A unique set of output commands is defined for each state for the purpose of controlling lower level subsystem controllers. These commands serve to achieve the desire vehicle functionality within each state and insure smooth transitions between states.

Phillips, Anthony Mark (Northville, MI); Blankenship, John Richard (Dearborn, MI); Bailey, Kathleen Ellen (Dearborn, MI); Jankovic, Miroslava (Birmingham, MI)

2001-01-01T23:59:59.000Z

403

Control sensitivity indices for stability analysis of HVdc systems  

SciTech Connect

This paper presents a new concept called the ``Control Sensitivity Index`` of CSI, for the stability analysis of HVdc converters connected to weak ac systems. The CSI for a particular control mode can be defined as the ratio of incremental changes in the two system variables that are most relevant to that control mode. The index provides valuable information on the stability of the system and, unlike other approaches, aids in the design of the controller. It also plays an important role in defining non-linear gains for the controller. This paper offers a generalized formulation of CSI and demonstrates its application through an analysis of the CSI for three modes of HVdc control. The conclusions drawn from the analysis are confirmed by a detailed electromagnetic transients simulation of the ac/dc system. The paper concludes that the CSI can be used to improve the controller design and, for an inverter in a weak ac system, the conventional voltage control mode is more stable than the conventional {gamma} control mode.

Nayak, O.B.; Gole, A.M. [Univ. of Manitoba, Winnipeg, Manitoba (Canada)] [Univ. of Manitoba, Winnipeg, Manitoba (Canada); Chapman, D.G.; Davies, J.B. [Manitoba Hydro, Winnipeg, Manitoba (Canada)] [Manitoba Hydro, Winnipeg, Manitoba (Canada)

1995-10-01T23:59:59.000Z

404

Energy Consumption in Access Networks  

Science Journals Connector (OSTI)

We present a comparison of energy consumption of access networks. We consider passive optical networks, fiber to the node, point-to-point optical systems and WiMAX. Optical access...

Baliga, Jayant; Ayre, Robert; Sorin, Wayne V; Hinton, Kerry; Tucker, Rodney S

405

A vital component of modern manufacturing systems is the scheduling and control system, which determines com-  

E-Print Network (OSTI)

264 Abstract A vital component of modern manufacturing systems is the scheduling and control system" to the unexpected system changes. Keywords: Scheduling and Control, Simulation Methods and Models Introduction iterative simulation-based scheduling mechanisms for manufacturing systems that operate in dynamic

Kutanoglu, Erhan

406

Fuzzy Logic Traction Controllers And Their Effect On Longitudinal Vehicle Platoon Systems  

E-Print Network (OSTI)

the plant. Figure 27 depicts the fuzzy logic control system.Figure 27: Fuzzy Logic Control System Fuzzification: Duringcontrol makes a fuzzy-logic control approach appealing (

Bauer, M.; Tomizuka, M.

1995-01-01T23:59:59.000Z

407

Occupant Response to Window Control Signaling Systems  

E-Print Network (OSTI)

of sustainable design practices and create a building thatdesign team or building manager, which  described the signaling system in the context of all of the other “sustainable” 

Ackerly, Katherine

2012-01-01T23:59:59.000Z

408

A persuasive GPS-controlled thermostat system  

E-Print Network (OSTI)

Using 10 weeks of data from a couple living in an instrumented home, we report on the potential of context-aware power management for energy saving. We identify an opportunity to save on heating and cooling using a system ...

Gupta, Manu, S. M. Massachusetts Institute of Technology

2008-01-01T23:59:59.000Z

409

Occupant Response to Window Control Signaling Systems  

E-Print Network (OSTI)

Air Conditioning   Fan coil units, variable refrigerant active cooling via fan coil units and radiant panels, system to perimeter fan coil units, and “open”  mode for 

Ackerly, Katherine

2012-01-01T23:59:59.000Z

410

Engine control system having fuel-based adjustment  

DOE Patents (OSTI)

A control system for an engine having a cylinder is disclosed having an engine valve configured to affect a fluid flow of the cylinder, an actuator configured to move the engine valve, and an in-cylinder sensor configured to generate a signal indicative of a characteristic of fuel entering the cylinder. The control system also has a controller in communication with the actuator and the sensor. The controller is configured to determine the characteristic of the fuel based on the signal and selectively regulate the actuator to adjust a timing of the engine valve based on the characteristic of the fuel.

Willi, Martin L. (Dunlap, IL); Fiveland, Scott B. (Metamora, IL); Montgomery, David T. (Edelstein, IL); Gong, Weidong (Dunlap, IL)

2011-03-15T23:59:59.000Z

411

Engine control system having fuel-based timing  

DOE Patents (OSTI)

A control system for an engine having a cylinder is disclosed having an engine valve movable to regulate a fluid flow of the cylinder and an actuator associated with the engine valve. The control system also has a sensor configured to generate a signal indicative of an amount of an air/fuel mixture remaining within the cylinder after completion of a first combustion event and a controller in communication with the actuator and the sensor. The controller may be configured to compare the amount with a desired amount, and to selectively regulate the actuator to adjust a timing of the engine valve associated with a subsequent combustion event based on the comparison.

Willi, Martin L. (Dunlap, IL); Fiveland, Scott B. (Metamora, IL); Montgomery, David T. (Edelstein, IL); Gong, Weidong (Dunlap, IL)

2012-04-03T23:59:59.000Z

412

A Web-based Geographical Information System for Low Bandwidth Access.  

E-Print Network (OSTI)

??The Geographic Information Systems (GIS) have become popular tool, used in different fields. The launching of Google Maps offered a new approach of building web… (more)

Shi, Zhennan

2007-01-01T23:59:59.000Z

413

Control Algorithms for Grid-Scale Battery Energy Storage Systems  

E-Print Network (OSTI)

Control Algorithms for Grid-Scale Battery Energy Storage Systems This report describes development-connected battery energy storage system. The report was submitted by HNEI to the U.S. Department of Energy Office.2: Energy Storage Systems August 2014 HAWAI`I NATURAL ENERGY INSTITUTE School of Ocean & Earth Science

414

Managing Uncertainty in Operational Control of Water Distribution Systems  

E-Print Network (OSTI)

Managing Uncertainty in Operational Control of Water Distribution Systems A. Bargiela Department. There are system management decisions concerning the regulatory measures such as water pricing principles, effluent in water distribution systems con- cern reservoir(s) management with associated pump scheduling

Bargiela, Andrzej

415

Power control system for a hot gas engine  

DOE Patents (OSTI)

A power control system for a hot gas engine of the type in which the power output is controlled by varying the mean pressure of the working gas charge in the engine has according to the present invention been provided with two working gas reservoirs at substantially different pressure levels. At working gas pressures below the lower of said levels the high pressure gas reservoir is cut out from the control system, and at higher pressures the low pressure gas reservoir is cut out from the system, thereby enabling a single one-stage compressor to handle gas within a wide pressure range at a low compression ratio.

Berntell, John O. (Staffanstorp, SE)

1986-01-01T23:59:59.000Z

416

Towards I/O analysis of HPC systems and a generic architecture to collect access patterns  

Science Journals Connector (OSTI)

In high-performance computing applications, a high-level I/O call will trigger activities on a multitude of hardware components. These are massively parallel systems supported by huge storage systems and internal software layers. Their complex interplay ... Keywords: Causality tree, I/O analysis, I/O path

Marc C. Wiedemann; Julian M. Kunkel; Michaela Zimmer; Thomas Ludwig; Michael Resch; Thomas Bönisch; Xuan Wang; Andriy Chut; Alvaro Aguilera; Wolfgang E. Nagel; Michael Kluge; Holger Mickler

2013-05-01T23:59:59.000Z

417

IMPROVEMENTS TO THE CRYOGENIC CONTROL SYSTEM ON DIII-D  

SciTech Connect

OAK-B135 The cryogenic facility that is part of the DIII-D tokamak system supplies liquid nitrogen and liquid helium to the superconducting magnets used for electron cyclotron heating, the D{sub 2} pellet injection system, cryopumps in the DIII-D vessel, and cryopanels in the neutral beam injection system. The liquid helium is liquefied on site using a Sulzer liquefier that has a 150 l/h liquefaction rate. Control of the cryogenic facility at DIII-D was initially accomplished through the use of three different programmable logic controllers (PLCs). Recently, two of those three PLCs, a Sattcon PLC controlling the Sulzer liquefier and a Westinghouse PLC, were removed and all their control logic was merged into the remaining PLC, a Siemens T1555. This replacement was originally undertaken because the removed PLCs were obsolete and unsupported. However, there have been additional benefits from the replacement. The replacement of the RS-232 serial links between the graphical user interface and the PLCs with a high speed Ethernet link allows for real-time display and historical trending of nearly all the cryosystem's data. this has greatly increased the ability to troubleshoot problems with the system, and has permitted optimization of the cryogenic system's performance because of the increased system integration. To move the control logic of the Sattcon control loops into the T1555, an extensive modification of the basic PID control was required. These modifications allow for better control of the control loops and are now being incorporated in other control loops in the system.

HOLTROP,K.L; ANDERSON,P.M; MAUZEY,P.S

2003-10-01T23:59:59.000Z

418

Robustness of discrete-time control systems  

E-Print Network (OSTI)

. The Bilinear Approach s-Plane to z-Plane F. Overbounding and Testing for Stability G. Interlacing Properties of Interval Polynomials Interlacing Property for Continuous- Time Systems Interlacing Property for Discrete- Time Systems Page 26 27 29 33... of p(z) from F(+t) Calculation of s+q Calculation of s~i Calculation of the Minimum Distance of p(z) from P&? Calculation of s Calculation of s Calculation of the Minimum Distance of p(z) from Flsi Calculation of ss Calculation of ss E...

Aguirre, Gabriel

1989-01-01T23:59:59.000Z

419

Fine-Grained Access Control System based on Outsourced Attribute-based Encryption  

E-Print Network (OSTI)

key generation-cloud ser- vice provider (KG-CSP) and decryption-cloud service provider (D-CSP with outsourced decryption and key- issuing. Finally, extensive experiment demonstrates that with the help of KG-CSP and D-CSP, efficient key-issuing and decryption are achieved in our constructions. #12;1 Introduction

Hou, Y. Thomas

420

Dependency path patterns as the foundation of access control in provenance-aware systems  

Science Journals Connector (OSTI)

A unique characteristics of provenance data is that it forms a directed acyclic graph (DAG) in accordance with the underlying causality dependencies between entities (acting users, action processes and data objects) involved in transactions. Data provenance ...

Dang Nguyen; Jaehong Park; Ravi Sandhu

2012-06-01T23:59:59.000Z

Note: This page contains sample records for the topic "access control system" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


421

Chapter 7 - Hacking Industrial Control Systems  

Science Journals Connector (OSTI)

Abstract An in-depth discussion on how an industrial network might be attacked, including possible target systems, and the potential consequences should those targets be compromised. Learn how a hacker thinks, how malware works, and what to do if your industrial network becomes infected.

Eric D. Knapp; Joel Thomas Langill

2015-01-01T23:59:59.000Z

422

Autonomous Thermal Control System Omid Ardakanian  

E-Print Network (OSTI)

18-24% of all energy usage. Building energy management can reduce both its operating costs and its- and middle-income countries, energy is mostly gener- ated from fossil fuel, directly contributing to global system in terms of energy efficiency. 1. Introduction Energy consumption of residential and commercial

Waterloo, University of

423

Advanced Power Systems and Controls Laboratory  

E-Print Network (OSTI)

photovoltaic generation facility. Solar panel output is in white, and the response of the XP DPR is in red Solar Power Generation Introduction The rapid growth of wind and solar power is a key driver of the development of grid-scale Battery Energy Storage Systems (BESS). A well implemented BESS co-located with solar

Ben-Yakar, Adela

424

Data Accessibility  

Science Journals Connector (OSTI)

Data accessibility is a criterion of data quality ..., and is met when authorized health professionals are provided with the means to find, obtain, or make use of ...

2008-01-01T23:59:59.000Z

425

Engine control system having pressure-based timing  

DOE Patents (OSTI)

A control system for an engine having a first cylinder and a second cylinder is disclosed having a first engine valve movable to regulate a fluid flow of the first cylinder and a first actuator associated with the first engine valve. The control system also has a second engine valve movable to regulate a fluid flow of the second cylinder and a sensor configured to generate a signal indicative of a pressure within the first cylinder. The control system also has a controller that is in communication with the first actuator and the sensor. The controller is configured to compare the pressure within the first cylinder with a desired pressure and selectively regulate the first actuator to adjust a timing of the first engine valve independently of the timing of the second engine valve based on the comparison.

Willi, Martin L. (Dunlap, IL); Fiveland, Scott B. (Metamora, IL); Montgomery, David T. (Edelstein, IL); Gong, Weidong (Dunlap, IL)

2011-10-04T23:59:59.000Z

426

Restricted Complexity Framework for Nonlinear Adaptive Control in Complex Systems  

SciTech Connect

Control law adaptation that includes implicit or explicit adaptive state estimation, can be a fundamental underpinning for the success of intelligent control in complex systems, particularly during subsystem failures, where vital system states and parameters can be impractical or impossible to measure directly. A practical algorithm is proposed for adaptive state filtering and control in nonlinear dynamic systems when the state equations are unknown or are too complex to model analytically. The state equations and inverse plant model are approximated by using neural networks. A framework for a neural network based nonlinear dynamic inversion control law is proposed, as an extrapolation of prior developed restricted complexity methodology used to formulate the adaptive state filter. Examples of adaptive filter performance are presented for an SSME simulation with high pressure turbine failure to support extrapolations to adaptive control problems.

Williams, Rube B. [Los Alamos National Laboratory, P.O. Box 1663, MS K575, Los Alamos, NM 87545 (United States)

2004-02-04T23:59:59.000Z

427

Force control system design for aerodynamic load simulator  

Science Journals Connector (OSTI)

A dynamic load simulator which can reproduce on-ground the aerodynamic hinge moment of control surface is an essential rig for the performance and stability test of an aircraft actuation system. The hinge moment varies widely over the flight envelope depending on the specific flight condition and maneuvering status. To replicate the wide spectrum of this hinge moment variation within some accuracy bounds, a force controller is designed based on the quantitative feedback theory (QFT). A dynamic model of load actuation system is derived, and verified through the experiment. The efficacy of QFT force controller is verified by a numerical simulation, in which combined aircraft dynamics, flight control law and hydraulic actuation system dynamics of aircraft control surface are considered.

Yoonsu Nam; Sung Kyung Hong

2002-01-01T23:59:59.000Z

428

E-Print Network 3.0 - access ofdma systems Sample Search Results  

NLE Websites -- All DOE Office Websites (Extended Search)

in UTRA LTE 5-7. Another draw- back in OFDMA... that the frequency domain equalized N-point DFT out- put for the uplink OFDMA system can be obtained from (11... . REFERENCES...

429

Access to glacial and subglacial environments in the Solar System by melting probe technology  

Science Journals Connector (OSTI)

The use of power intensive devices such as ice-melting probes in the outer Solar System strongly points to radioactive units for ... traditional space application RHU (Radioactive Heater Unit) technology is based...

Stephan Ulamec; Jens Biele; Oliver Funke…

2007-08-01T23:59:59.000Z

430

E-Print Network 3.0 - access system lacs Sample Search Results  

NLE Websites -- All DOE Office Websites (Extended Search)

dynamics study on the formation of metallofullerene Summary: . The structures of the host carbon clusters were not affected a lot compared to those in La-C system because... . The...

431

Ammonia-Free NOx Control System  

SciTech Connect

Research is being conducted under United States Department of Energy (DOE) Contract DEFC26-03NT41865 to develop a new technology to achieve very low levels of NOx emissions from pulverized coal fired boiler systems by employing a novel system level integration between the PC combustion process and the catalytic NOx reduction with CO present in the combustion flue gas. The combustor design and operating conditions will be optimized to achieve atypical flue gas conditions. This approach will not only suppress NOx generation during combustion but also further reduce NOx over a downstream catalytic reactor that does not require addition of an external reductant, such as ammonia. This report describes the work performed during the January 1 to March 31, 2004 time period.

S. Wu; Z. Fan; R. Herman

2004-03-31T23:59:59.000Z

432

Ammonia-Free NOx Control System  

SciTech Connect

Research is being conducted under United States Department of Energy (DOE) Contract DEFC26-03NT41865 to develop a new technology to achieve very low levels of NOx emissions from pulverized coal fired boiler systems by employing a novel system level integration between the PC combustion process and the catalytic NOx reduction with CO present in the combustion flue gas. The combustor design and operating conditions will be optimized to achieve atypical flue gas conditions. This approach will not only suppress NOx generation during combustion but also further reduce NOx over a downstream catalytic reactor that does not require addition of an external reductant, such as ammonia. This report describes the work performed during the October 1 to December 31, 2003 time period.

S. Wu

2003-12-31T23:59:59.000Z

433

Vulnerability Analysis of Energy Delivery Control Systems - 2011 |  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Vulnerability Analysis of Energy Delivery Control Systems - 2011 Vulnerability Analysis of Energy Delivery Control Systems - 2011 Vulnerability Analysis of Energy Delivery Control Systems - 2011 Cybersecurity for energy delivery systems has emerged as one of the Nation's most serious grid modernization and infrastructure protection issues. Cyber adversaries are becoming increasingly targeted, sophisticated, and better financed. The energy sector must research, develop and deploy new cybersecurity capabilities faster than the adversary can launch new attack tools and techniques. The goal of the U.S. Department of Energy Office of Electricity Delivery and Energy Reliability (DOE/OE) National Supervisory Control and Data Acquisition (SCADA) Test Bed (NSTB) program is to enhance the reliability and resiliency of the Nation's energy infrastructure by reducing the risk

434

Model Specification for Networked Outdoor Lighting Control Systems  

Energy.gov (U.S. Department of Energy (DOE))

The DOE Municipal Solid-State Street Lighting Consortium's Model Specification for Networked Outdoor Lighting Control Systems is a tool designed to help cities, utilities, and other local agencies...

435

Emission Control Systems and Components for Retrofit and First...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

of Advanced Emission Controls for the Retrofit Market Development of a Stand-Alone Urea-SCR System for NOx Reduction in Marine Diesel Engines HD Truck and Engine Fuel Efficiency...

436

Control system design for a parallel hybrid electric vehicle  

E-Print Network (OSTI)

This thesis addresses the design of control systems for a parallel hybrid electric drive train which is an alternative to conventional passenger vehicles. The principle components of the drive train are a small internal combustion engine...

Buntin, David Leighton

1994-01-01T23:59:59.000Z

437

Decentralized model predictive control of a multiple evaporator HVAC system  

E-Print Network (OSTI)

Vapor compression cooling systems are the primary method used for refrigeration and air conditioning, and as such are a major component of household and commercial building energy consumption. Application of advanced control techniques...

Elliott, Matthew Stuart

2009-05-15T23:59:59.000Z

438

Decentralized Control of Infinite Systems Gabriel Kalyon Tristan Le Gall  

E-Print Network (OSTI)

Decentralized Control of Infinite Systems Gabriel Kalyon · Tristan Le Gall · Herv´e Marchand. Marchand INRIA, Centre Rennes - Bretagne Atlantique E-mail: herve.marchand@inria.fr G. Kalyon is supported

Paris-Sud XI, Université de

439

Adaptive swing-up and balancing control of acrobot systems  

E-Print Network (OSTI)

The field of underactuated robotics has become the core of agile mobile robotics research. Significant past effort has been put into understanding the swing-up control of the acrobot system. This thesis implements an online, ...

Johnson, Luke B

2009-01-01T23:59:59.000Z

440

The design and implementation of a demonstration supplementary control system  

E-Print Network (OSTI)

The overall goal of the Chestnut Ridge Supplemental Control System (SCS) demonstration project was to demonstrate how an existing monitoring network, existing air quality models, and existing meteorological forecasting ...

Ruane, Michael Frederick

1980-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "access control system" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


441

Control Strategy for Wind and Solar Hybrid Generation System  

Science Journals Connector (OSTI)

Solar energy and wind energy are the two most viable renewable ... . This paper presents a control strategy for wind & solar hybrid power generating systems. If the power generation sources produce more ... strat...

Xin Gao

2011-01-01T23:59:59.000Z

442

Using Building Control System for Commissioning  

E-Print Network (OSTI)

France-USA Finland France Japan USA Netherlands Main End-Users BOp MC ES BD BOp BI BOp MC ES BOp BOw BS BOp ES BOp MC ES MI CA BOp MC ES BOp Type building Large commercial buildings Any types Medium and large commercial... 34, VTT, Finland, ISBN 951-38-5725-5. [4] Castro, N.S., Galler, M. A., Bushby, S. T. ?A Test Shell for Developing Automated Commissioning Tools for BACnet Systems? National Conference on Building Commissioning, 2003. ...

Vaezi-Nejad, H.; Salsbury, T.; Choiniere, D.

2004-01-01T23:59:59.000Z

443

Study on Electric Control System for a Full Hybrid Bus  

Science Journals Connector (OSTI)

For efficient and reliable operation of a novel hybrid powertrain assembled in the bus, a set of control strategy combined with the structural characteristics was researched. Based on the identification of the driver's intension, this paper presented ... Keywords: full hybrid bus, eletric control system, stretegy, fuel economy

Zhiguo Kong; Hongxiu Wang

2013-07-01T23:59:59.000Z

444

Assessing the Control Systems Capacity for Demand Response in  

E-Print Network (OSTI)

LBNL-5319E Assessing the Control Systems Capacity for Demand Response in California Industries in this report was coordinated by the Demand Response Research Center and funded by the California Energy of the Demand Response Research Center Industrial Controls Experts Working Group: · Jim Filanc, Southern

445

Use of a Machine Control & Guidance System Determination of Performance  

E-Print Network (OSTI)

1 Use of a Machine Control & Guidance System Determination of Performance Protection against. Dr. P. Rausch Why Machine Guidance? 1 Introduction Machine Guidance allows higher performance. Higher someone checking down below: 09.07.2008 3 ,,Machine control by shout and gesture". Planned Excavator Job

446

PROGRAMME SPECIFICATION POSTGRADUATE PROGRAMMES Programme name Systems and Control Engineering  

E-Print Network (OSTI)

Engineering Award MSc School School of Engineering and Mathematical Sciences Department or equivalent School of Engineering and Mathematical Sciences Programme code PSSYCO Type of study Full Time Part Time Total UK credits, linear and non-linear systems, optimisation and optimal control and advanced control techniques as well

Weyde, Tillman

447

Design for Control System of Wastegate Valve Actuator in Turbocharger  

Science Journals Connector (OSTI)

This paper has designed a set of control system of waste gate valve actuator in turbocharger, it enables the waste gate valve regulate the exhaust flow before turbo automatically according to the operating condition of engine, so it can lower the pressure ... Keywords: wastegate valve, electronic control, design, test

Liu Xinghua; Yu Lei; Liu Fushui; Wu Wenfeng; Wang Ruwei

2010-12-01T23:59:59.000Z

448

State Control Design for Linear Systems with Distributed Time Delays  

E-Print Network (OSTI)

State Control Design for Linear Systems with Distributed Time Delays Daniel Gontkovic and Róbert with distributed time delays. Using an extended form of the Lyapunov- Krasovskii functional the controller design involving distributed time delays is a problem of large practical interest where intensive activity are done

Paris-Sud XI, Université de

449

Neutron economic reactivity control system for light water reactors  

DOE Patents (OSTI)

A neutron reactivity control system for a LWBR incorporating a stationary seed-blanket core arrangement. The core arrangement includes a plurality of contiguous hexagonal shaped regions. Each region has a central and a peripheral blanket area juxapositioned an annular seed area. The blanket areas contain thoria fuel rods while the annular seed area includes seed fuel rods and movable thoria shim control rods.

Luce, Robert G. (Glenville, NY); McCoy, Daniel F. (Latham, NY); Merriman, Floyd C. (Rotterdam, NY); Gregurech, Steve (Scotia, NY)

1989-01-01T23:59:59.000Z

450

Vibration Control of Multi-Mode Rotor-Bearing Systems  

Science Journals Connector (OSTI)

8 March 1983 research-article Vibration Control of Multi-Mode Rotor-Bearing...least-squares method to minimize the vibration of any general rotor-bearing system...to implement the open-loop adaptive vibration control strategies outlined in the paper...

1983-01-01T23:59:59.000Z

451

Daylighting control systems : Daylighting The New York Times Building  

NLE Websites -- All DOE Office Websites (Extended Search)

control systems control systems Overview The architectural approach The owner's approach Daylighting field study Daylighting control systems Automated roller shades Procurement specifications Shades and Shade Controls Lighting Controls Visualizing daylight Commissioning/ verification Demand response Mainstream solutions Post-occupancy evaluation Publications Sponsors Project team Daylighting control systems Lighting energy savings were greater in zones daylit bilaterally from both the southwest and northwest facades, typically 50-60% at 11 feet from the windows and 25-40% at 14-25 feet from the façade. Total illuminance was maintained in all lighting zones to within -10% of the setpoint for 95-100% of the day throughout most of the nine-month monitored period. Daylight "harvesting" strategies are implemented using daylighting control systems that dim the electric lighting in response to interior daylight levels. For commercial applications, the light output of fluorescent lamps (T5 or T8) are varied by using electronic dimming ballasts. Photosensors, typically mounted in the ceiling, are used to measure the quantity of daylight in the space then determine the amount of dimming required to maintain the design work plane illuminance level. If daylight levels are more than adequate, the electric lights can be shut off. Simulation studies indicate that annual energy use and peak demand can be reduced by 20-30% compared to a non-daylit building. These technological solutions are increasingly becoming one of the key means to achieving compliance with stringent energy-efficiency standards and achieving LEED ratings for sustainable design.

452

Cardax New Operator Access Request Upon completion of this form (2 pages), please fax to Properties System Support on (08) 9266 2660 or scan and send via email  

E-Print Network (OSTI)

Cardax ­ New Operator Access Request Upon completion of this form (2 pages), please fax to Properties System Support on (08) 9266 2660 or scan and send via email to PropertiesSystem: ______________________________________ __________________________________________________________________ OPERATOR REQUIREMENTS The section below is to ONLY be completed by INTERNAL applicants. SAME operator

453

Advanced Instrumentation, Information, and Control Systems Technologies Technical Program Plan  

SciTech Connect

Reliable instrumentation, information, and control (II&C) systems technologies are essential to ensuring safe and efficient operation of the U.S. light water reactor (LWR) fleet. These technologies affect every aspect of nuclear power plant (NPP) and balance-of-plant operations. In 1997, the National Research Council conducted a study concerning the challenges involved in modernization of digital instrumentation and control systems in NPPs. Their findings identified the need for new II&C technology integration.

Bruce Hallbert

2012-09-01T23:59:59.000Z

454

Projective synchronization in fractional order chaotic systems and its control  

E-Print Network (OSTI)

The chaotic dynamics of fractional (non-integer) order systems have begun to attract much attention in recent years. In this paper, we study the projective synchronization in two coupled fractional order chaotic oscillators. It is shown that projective synchronization can also exist in coupled fractional order chaotic systems. A simple feedback control method for controlling the scaling factor onto a desired value is also presented.

Chunguang Li

2006-04-24T23:59:59.000Z

455

Advanced Controls and Sustainable Systems for Residential Ventilation  

NLE Websites -- All DOE Office Websites (Extended Search)

Advanced Controls and Sustainable Systems for Residential Ventilation Advanced Controls and Sustainable Systems for Residential Ventilation Title Advanced Controls and Sustainable Systems for Residential Ventilation Publication Type Report LBNL Report Number LBNL-5968E Year of Publication 2012 Authors Turner, William J. N., and Iain S. Walker Date Published 12/2012 Keywords ashrae standard 62,2, california title 24, passive ventilation, residential ventilation, ventilation controller Abstract Whole-house ventilation systems are becoming commonplace in new construction, remodeling/renovation, and weatherization projects, driven by combinations of specific requirements for indoor air quality (IAQ), health, and compliance with standards, such as ASHRAE 62.2. At the same time we wish to reduce the energy use in homes and therefore minimize the energy used to provide ventilation. This study examined several approaches to reducing the energy requirements of providing acceptable IAQ in residential buildings. Two approaches were taken. The first used RIVEC - the Residential Integrated VEntilation Controller - a prototype ventilation controller that aims to deliver whole-house ventilation rates that comply with ventilation standards, for the minimum use of energy. The second used passive and hybrid ventilation systems, rather than mechanical systems, to provide whole-house ventilation.

456

From Basic Control to Optimized Systems-Applying Digital Control Systems to Steam Boilers  

E-Print Network (OSTI)

This presentation examines the application of Distributed Digital Controls in order to review the application of this recent control technology towards Steam Boilers in a step-by-step manner. The main purpose of a steam generating boiler...

Hockenbury, W. D.

1982-01-01T23:59:59.000Z

457

Resilient Control System Execution Agent (ReCoSEA)  

SciTech Connect

In an increasingly networked world, critical infrastructure systems suffer from two types of vulnerability. The first is the traditionally recognized problem of monitoring the systems for faults and failures, recognizing and analyzing data, and responding with real understanding to the problems of the system. Increasingly complex systems create the opportunity for single points of failure to cascade when inaccurate assessment of system health increases response time or leads to faulty analysis of the problems involved. A second problem involves vulnerability to cyber intrusion, in which bad actors can mask system deterioration or present false data about system status. A resilient system will protect stability, efficiency, and security. To ensure these three states, the system must react to changing conditions within the system with coordination: no one component of the system can be allowed to react to problems without real consideration of the effects of that action on other components within the system. Systems with multi-agent design typically have three layers of action, a management layer, a coordination layer, and an execution layer. A resilient multi-agent system will emphasize functions of the execution layer, which has the responsibility of initiating actions, monitoring, analyzing, and controlling its own processes, while feeding information back to the higher levels of management and coordination. The design concept of a resilient control system execution agent (ReCoSEA) grows out of these underpinnings, and through the use of computational intelligence techniques, this paper suggests an associated design methodology.

Craig G. Rieger; Kris Villez

2012-08-01T23:59:59.000Z

458

An intelligent information access system assisting a case based learning methodology evaluated in higher education with medical students  

Science Journals Connector (OSTI)

In recent years there has been a shift in educational methodologies toward a student-centered approach, one which increasingly emphasizes the integration of computer tools and intelligent systems adopting different roles. In this paper we describe in detail the development of an Intelligent Information Access system used as the basis for producing and assessing a constructivist learning methodology with undergraduate students. The system automatically detects significant concepts available within a given clinical case and facilitates an objective examination, following a proper selection process of the case in which is taken into account the students’ knowledge level. The learning methodology implemented is intimately related to concept-based, case-based and internet-based learning. In spite of growing theoretical research on the use of information technology in higher education, it is rare to find applications that measure learning and students’ perceptions and compare objective results with a free Internet search. Our work enables students to gain understanding of the concepts in a case through Web browser interaction with our computer system identifying these concepts and providing direct access to enriched related information from Medlineplus, Freebase and PubMed. In order to evaluate the learning activity outcomes, we have done a trial run with volunteer students from a 2nd year undergraduate Medicine course, dividing the volunteers into two groups. During the activity all students were provided with a clinical case history and a multiple choice test with medical questions relevant to the case. This test could be done in two different ways: learners in one group were allowed to freely seek information on the Internet, while the other group could only search for information using the newly developed computer tool. In the latter group, we measured how students perceived the tool’s support for solving the activity and the Web interface usability, supplying them with a Likert questionnaire for anonymous completion. The particular case selected was a female with a medical history of heart pathology, from which the system derived medical terms closely associated with her condition description, her clinical evolution and treatment.

Fernando Aparicio; Manuel De Buenaga; Margarita Rubio; Asunción Hernando

2012-01-01T23:59:59.000Z

459

Modeling of hybrid control systems using the \\{DEVSLib\\} Modelica library  

Science Journals Connector (OSTI)

\\{DEVSLib\\} is a free Modelica library, developed by the authors, that supports the Parallel DEVS formalism. The library is mainly designed to model discrete-event systems. It also includes interfaces to communicate the \\{DEVSLib\\} models with the rest of the Modelica libraries. Thus, the library can be used in the development of multi-domain and multi-formalism hybrid models using the object-oriented methodology supported by Modelica. This manuscript presents the hybrid system modeling capabilities included in DEVSLib. In particular, these functionalities are applied to the description of hybrid control systems. A case study of a supermarket refrigeration system, using the traditional control approach, is discussed. Three implementations of the plant and its controllers have been developed and are described. The system is simulated reproducing the day and night conditions, and the results from the three implementations are compared. \\{DEVSLib\\} is freely available for download at http://www.euclides.dia.uned.es.

Victorino Sanz; Alfonso Urquia; François E. Cellier; Sebastian Dormido

2012-01-01T23:59:59.000Z

460

Accessibility : PUBLIC D.4.1.1 Semantics of multi-mode DAE systems  

E-Print Network (OSTI)

for the evolution and the design of future releases of the Modelica language for such systems. We focus for future releases of Modelica can be drawn. hal-00938891,version1-29Jan2014 #12;D.4.1.1 MODRIO (ITEA 2

Paris-Sud XI, Université de

Note: This page contains sample records for the topic "access control system" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


461

Accessible methods for the dynamic time-scale decomposition of biochemical systems  

Science Journals Connector (OSTI)

......simulated with Matlab is 102. 3...with the direct simulation of the corresponding...DAE system with Matlab. Figure 6 shows...Computing in Chemical Engineering...slowly oscillating processes: the circadian...In: Winter Simulation Conference 2006...Supplementary Data - pdf file Supplementary......

Irina Surovtsova; Natalia Simus; Thomas Lorenz; Artjom König; Sven Sahle; Ursula Kummer

2009-11-01T23:59:59.000Z

462

A Distributed Metadata Management, Data Discovery and Access System Giriprakash Palanisamy1  

E-Print Network (OSTI)

development consortium now includes funding from NASA, USGS, and DOE. A major new version of Mercury. Mercury has been used by various scientific projects that are funded by NASA, USGS and DOE (ORNL DAAC, Dublin- Core, Darwin-Core, EML, and ISO-19115. The new Mercury system is based on open source and Service

463

Increasing Community Access to Solar: Designing and Developing a Shared Solar Photovoltaic System (Fact Sheet)  

SciTech Connect

This document introduces the Energy Department's new Guide to Community Shared Solar: Utility, Private, and Nonprofit Project Development. The guide is designed to help those who want to develop community shared solar projects - from community organizers and advocates to utility managers and government officials - navigate the process of developing shared systems, from early planning to implementation.

Not Available

2012-06-01T23:59:59.000Z

464

CO 2 - Based Demand-Controlled Ventilation Control Strategies for Multi-Zone HVAC Systems  

E-Print Network (OSTI)

CO 2-based demand-controlled ventilation DCV strategy offers a great opportunity to reduce energy consumption in HVAC systems while providing the required ventilation. However, implementing CO 2-based DCV under ASHRAE 62.1.2004 through 2010...

Nassif, N.

2011-01-01T23:59:59.000Z

465

Monitoring Buildings with Energy Management and Control Systems  

NLE Websites -- All DOE Office Websites (Extended Search)

6 6 Monitoring Buildings with Energy Management and Control Systems Monitoring and evaluation are important parts of all energy-efficiency programs. With the increasing regulatory requirements for verification of demand-side management program savings and continued development of more innovative financing mechanisms, the ability to substantiate claims of energy savings using measured data takes on added importance. Although expensive, the accurate monitoring of energy consumption and building operations is a necessary part of conservation savings analysis. Energy management and control systems (EMCSs), intended for building operations and control functions, already contain most of the same equipment usually installed for energy monitoring and can often be used for

466

An Approach to Supervisory Control of an Energy Management Control System Using Fuzzy Logic  

E-Print Network (OSTI)

In this paper an approach to supervisory control of multi-stage industrial control systems is presented. This approach is based on the notion of an internal reference model, and further makes use of a fuzzy multi-objective optimization strategy...

Langari, R.

467

Nonlinear control for systems with bounded inputs: Real-time embedded control applied to UAVs  

E-Print Network (OSTI)

Nonlinear control for systems with bounded inputs: Real-time embedded control applied to UAVs Farid) UAVs including conventional helicopters, four- rotors aircraft (Draganflyer) and several designs for small aerial vehicles, some restrictions and conditions specific to small UAVs have to be considered

Sontag, Eduardo

468

Control of Airborne Wind Energy Systems Based on Nonlinear Model Predictive Control & Moving Horizon Estimation  

E-Print Network (OSTI)

tethered to the ground at a high velocity across the wind direction. Power can be generated by a, the first option is considered. Because it involves a much lighter structure, a major advantage of powerControl of Airborne Wind Energy Systems Based on Nonlinear Model Predictive Control & Moving

469

Decoupled Control of Doubly Fed Induction Generator by Vector Control for Wind Energy Conversion System  

Science Journals Connector (OSTI)

Abstract Since the penetration of wind power generation in growing, system operators have an increasing interest in analyzing the impact of wind power on the connected power system. The doubly fed induction generator (DFIG) is generally used in the production of the electric energy and more specifically in wind turbines. Currently, to regulate the active and reactive power exchanged between the machine and the grid. A detail dynamic model of a DFIG-based wind-turbine grid-connected system is presented in the d,q -synchronous reference frame by controlling the machine inverter with the algorithm of control based on vector control concept (with stator flux orientation). The aim of control is to have measured active and reactive powers equal to the reference values. These powers must then be collected. In order to measure only the rotor currents, we can use an indirect control method, with integrating power regulation loop, using a classical PI controller: proportional–integral. In this way, this control is able to limit the machine rotor currents. In another way, an appropriate fitness function is derived to express the time domain evolution of DFIG, with the objective to assure the DFIG continuous operation even under a fault condition and improve at the same time its transient behavior as compared with the indirect control without power loop. The control of our machine is simulated; finally the Simulations results are presented and discussed.

K. Kerrouche; A. Mezouar; Kh. Belgacem

2013-01-01T23:59:59.000Z

470

Adaptive hybrid optimal quantum control for imprecisely characterized systems  

E-Print Network (OSTI)

Optimal quantum control theory carries a huge promise for quantum technology. Its experimental application, however, is often hindered by imprecise knowledge of the its input variables, the quantum system's parameters. We show how to overcome this by Adaptive Hybrid Optimal Control (Ad-HOC). This protocol combines open- and closed-loop optimal by first performing a gradient search towards a near-optimal control pulse and then an experimental fidelity measure with a gradient-free method. For typical settings in solid-state quantum information processing, Ad-Hoc enhances gate fidelities by an order of magnitude hence making optimal control theory applicable and useful.

D. J. Egger; F. K. Wilhelm

2014-02-28T23:59:59.000Z

471

Autonomous, teleoperated, and shared control of robot systems  

SciTech Connect

This paper illustrates how different modes of operation such as bilateral teleoperation, autonomous control, and shared control can be described and implemented using combinations of modules in the SMART robot control architecture. Telerobotics modes are characterized by different ``grids`` of SMART icons, where each icon represents a portion of run-time code that implements a passive control law. By placing strict requirements on the module`s input-output behavior and using scattering theory to develop a passive sampling technique, a flexible, expandable telerobot architecture is achieved. An automatic code generation tool for generating SMART systems is also described.

Anderson, R.J.

1994-12-31T23:59:59.000Z

472

Controlled environment vitrification system for preparation of liquids  

DOE Patents (OSTI)

A system is described for preparing specimens in a controlled environment to insure that a liquid or partially liquid specimen is maintained in its original state while it is being prepared, and once prepared the specimen is vitrified or solidified with minimal alteration of its microstructure. The controlled environment is provided within a chamber where humidity and temperature can be controlled precisely while the specimen is prepared. The specimen is mounted on a plunger and a shutter controlled opening is opened substantially simultaneously with release of the plunger so the specimen is propelled through the shutter into an adjacent cryogenic bath. 7 figs.

Bellare, J.R.; Davis, H.T.; Scriven, L.E. II; Talmon, Y.

1988-06-28T23:59:59.000Z

473

Smart panels with SISO or MIMO velocity feedback control systems  

Science Journals Connector (OSTI)

This paper summarizes and contrasts the research work that has been carried out on two types of smart panels with ASAC control systems: first a SISO velocity feedback control system with a sensor that detects the volumetric component of the vibration of the panel and an actuator that exerts a uniform force over the surface of the panel and second a MIMO decentralized feedback control system using a grid of sensors that measure the point velocities of the panel and a grid of actuators that generates point excitations in the locations of the sensors. Both theoretical predictions and experimental results are presented for a reference problem of control of sound radiation by a rectangular panel clamped along the perimeter. The simulations carried out for the two systems have shown that the smart panel with the volume velocity sensor and uniform force actuator can in principle give better control performance than the smart panel with the sixteen decentralized control units. However the practical implementation of the smart panel with the volume velocity sensor and uniform force actuator is limited by stability problems which are instead a minor issue for the panel with 16 decentralized velocity feedback control units.

2003-01-01T23:59:59.000Z

474

Remote information service access system based on a client-server-service model  

DOE Patents (OSTI)

A local host computing system, a remote host computing system as connected by a network, and service functionalities: a human interface service functionality, a starter service functionality, and a desired utility service functionality, and a Client-Server-Service (CSS) model is imposed on each service functionality. In one embodiment, this results in nine logical components and three physical components (a local host, a remote host, and an intervening network), where two of the logical components are integrated into one Remote Object Client component, and that Remote Object Client component and the other seven logical components are deployed among the local host and remote host in a manner which eases compatibility and upgrade problems, and provides an illusion to a user that a desired utility service supported on a remote host resides locally on the user's local host, thereby providing ease of use and minimal software maintenance for users of that remote service.

Konrad, Allan M. (P.O. Box 4023, Berkeley, CA 94704)

1999-01-01T23:59:59.000Z

475

Remote information service access system based on a client-server-service model  

DOE Patents (OSTI)

A local host computing system, a remote host computing system as connected by a network, and service functionalities: a human interface service functionality, a starter service functionality, and a desired utility service functionality, and a Client-Server-Service (CSS) model is imposed on each service functionality. In one embodiment, this results in nine logical components and three physical components (a local host, a remote host, and an intervening network), where two of the logical components are integrated into one Remote Object Client component, and that Remote Object Client component and the other seven logical components are deployed among the local host and remote host in a manner which eases compatibility and upgrade problems, and provides an illusion to a user that a desired utility service supported on a remote host resides locally on the user's local host, thereby providing ease of use and minimal software maintenance for users of that remote service.

Konrad, Allan M. (P.O. Box 4023, Berkeley, CA 94704)

1997-01-01T23:59:59.000Z

476

Port-Hamiltonian systems: network modeling and control of nonlinear physical systems  

E-Print Network (OSTI)

Port-Hamiltonian systems: network modeling and control of nonlinear physical systems A.J. van der Schaft February 3, 2004 Abstract It is shown how port-based modeling of lumped-parameter complex physical to a geometrically defined class of systems, called port-Hamiltonian systems. These are Hamiltonian systems defined

Schaft, Arjan van der

477

Dual annular rotating "windowed" nuclear reflector reactor control system  

DOE Patents (OSTI)

A nuclear reactor control system is provided in a nuclear reactor having a core operating in the fast neutron energy spectrum where criticality control is achieved by neutron leakage. The control system includes dual annular, rotatable reflector rings. There are two reflector rings: an inner reflector ring and an outer reflector ring. The reflectors are concentrically assembled, surround the reactor core, and each reflector ring includes a plurality of openings. The openings in each ring are capable of being aligned or non-aligned with each other. Independent driving means for each of the annular reflector rings is provided so that reactor criticality can be initiated and controlled by rotation of either reflector ring such that the extent of alignment of the openings in each ring controls the reflection of neutrons from the core.

Jacox, Michael G. (Idaho Falls, ID); Drexler, Robert L. (Idaho Falls, ID); Hunt, Robert N. M. (Idaho Falls, ID); Lake, James A. (Idaho Falls, ID)

1994-01-01T23:59:59.000Z

478

Experimental feedback control of quantum systems using weak measurements  

E-Print Network (OSTI)

A goal of the emerging field of quantum control is to develop methods for quantum technologies to function robustly in the presence of noise. Central issues are the fundamental limitations on the available information about quantum systems and the disturbance they suffer in the process of measurement. In the context of a simple quantum control scenario--the stabilization of non-orthogonal states of a qubit against dephasing--we experimentally explore the use of weak measurements in feedback control. We find that, despite the intrinsic difficultly of implementing them, weak measurements allow us to control the qubit better in practice than is even theoretically possible without them. Our work shows that these more general quantum measurements can play an important role for feedback control of quantum systems.

G. G. Gillett; R. B. Dalton; B. P. Lanyon; M. P. Almeida; M. Barbieri; G. J. Pryde; J. L. O'Brien; K. J. Resch; S. D. Bartlett; A. G. White

2010-03-01T23:59:59.000Z

479

Control Systems Security News Archive | Department of Energy  

NLE Websites -- All DOE Office Websites (Extended Search)

News Archive News Archive Control Systems Security News Archive Control Systems Security News Archive September 2010 - Secretary Chu Announces Latest Efforts to Address Cybersecurity August 2010: - DOE 2010 Cybersecurity Peer Review Update March 2010 - DOE and Industry Showcase New Control Systems Security Technologies at DistribuTECH Feb. 2010 - DOE Issues National Energy Sector Cyber Organization Notice of Intent Nov. 2009 - New TCIPG Research Program Builds on Past Successes with Nearly $18.8 Million DOE Award October 2009 - DOE NSTB researchers demonstrated R&D successes to asset owners at EnergySec Conference September 2009 - ISA approves standard for wireless automation in process control applications Sept. 2009 - Government and Industry a Force for Collaboration at the

480

Flex power perspectives of indirect power system control through dynamic  

Open Energy Info (EERE)

Flex power perspectives of indirect power system control through dynamic Flex power perspectives of indirect power system control through dynamic power price (Smart Grid Project) Jump to: navigation, search Project Name Flex power perspectives of indirect power system control through dynamic power price Country Denmark Coordinates 56.26392°, 9.501785° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":56.26392,"lon":9.501785,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

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481

Vehicle Technologies Office: Thermal Control and System Integration  

NLE Websites -- All DOE Office Websites (Extended Search)

Thermal Control and System Integration Thermal Control and System Integration The thermal control and system integration activity focuses on issues such as the integration of motor and power control technologies and the development of advanced thermal control technologies. Thermal control is a critical element to enable power density, cost, and reliability of Power Electronics and Electric Machines (PEEM). Current hybrid electric vehicle systems typically use a dedicated 65°C coolant loop to cool the electronics and electric machines. A primary research focus is to develop cooling technologies that will enable the use of coolant temperatures of up to 105°C. Enabling the higher-temperature coolant would reduce system cost by using a single loop to cool the PEEM, internal combustion engine or fuel cell. Several candidate cooling technologies are being investigated along with the potential to reduce material and component costs through the use of more aggressive cooling. Advanced component modeling, fabrication, and manufacturing techniques are also being investigated.

482

CORBA-Based Distributed Software Framework for the NIF Integrated Computer Control System  

SciTech Connect

The National Ignition Facility (NIF), currently under construction at the Lawrence Livermore National Laboratory, is a stadium-sized facility containing a 192-beam, 1.8 Megajoule, 500-Terawatt, ultra-violet laser system together with a 10-meter diameter target chamber with room for nearly 100 experimental diagnostics. The NIF is operated by the Integrated Computer Control System (ICCS) which is a scalable, framework-based control system distributed over 800 computers throughout the NIF. The framework provides templates and services at multiple levels of abstraction for the construction of software applications that communicate via CORBA (Common Object Request Broker Architecture). Object-oriented software design patterns are implemented as templates and extended by application software. Developers extend the framework base classes to model the numerous physical control points and implement specializations of common application behaviors. An estimated 140 thousand software objects, each individually addressable through CORBA, will be active at full scale. Many of these objects have persistent configuration information stored in a database. The configuration data is used to initialize the objects at system start-up. Centralized server programs that implement events, alerts, reservations, data archival, name service, data access, and process management provide common system wide services. At the highest level, a model-driven, distributed shot automation system provides a flexible and scalable framework for automatic sequencing of work-flow for control and monitoring of NIF shots. The shot model, in conjunction with data defining the parameters and goals of an experiment, describes the steps to be performed by each subsystem in order to prepare for and fire a NIF shot. Status and usage of this distributed framework are described.

Stout, E A; Carey, R W; Estes, C M; Fisher, J M; Lagin, L J; Mathisen, D G; Reynolds, C A; Sanchez, R J

2007-11-20T23:59:59.000Z

483

Distributed digital real-time control system for TCV tokamak  

Science Journals Connector (OSTI)

Abstract A new digital feedback control system (named the SCD “Système de Contrôle Distribué”) has been developed, integrated and used successfully to control TCV (Tokamak à Configuration Variable) plasmas. The system is designed to be modular, distributed, and scalable, accommodating hundreds of diagnostic inputs and actuator outputs. With many more inputs and outputs available than previously possible, it offers the possibility to design advanced control algorithms with better knowledge of the plasma state and to coherently control all TCV actuators, including poloidal field (PF) coils, gas valves, the gyrotron powers and launcher angles of the electron cyclotron heating and current drive system (ECRH/ECCD) together with diagnostic triggering signals. The system consists of multiple nodes; each is a customised Linux desktop or embedded PC which may have local ADC and DAC cards. Each node is also connected to a memory network (reflective memory) providing a reliable, deterministic method of sharing memory between all nodes. Control algorithms are programmed as block diagrams in Matlab-Simulink providing a powerful environment for modelling and control design. The C code is generated automatically from the Simulink block diagram and compiled, with the Simulink Embedded Coder (SEC, formerly Real-Time Workshop Embedded Coder), into a Linux shared library (“.so” file) and distributed to target nodes in the discharge preparation phase. During the TCV discharge, an application on each node is executed that dynamically loads the shared library at runtime. In order to obtain reliable and reproducible real time execution of the algorithm, all interrupts to the CPU on each node are suspended just before firing the shot and re-enabled afterwards. Since installation, the new digital control system has been used for a multitude of plasma control applications, ranging from basic experiments of coil current and density control to advanced experiments of MHD (magnetohydrodynamics) and plasma profile control, as well as real-time plasma transport simulations. Recently, a real-time version of a plasma equilibrium reconstruction code was developed and implemented, providing the future possibility to control the plasma shape and profiles directly during the discharge evolution. This paper presents the architecture of the new control system, its integration into the TCV plant and a sample of control applications used for TCV plasma discharges.

H.B. Le; F. Felici; J.I. Paley; B.P. Duval; J.-M. Moret; S. Coda; O. Sauter; D. Fasel; P. Marmillod

2014-01-01T23:59:59.000Z

484

A System Level Boundary Scan Controller Board for VME Applications  

Science Journals Connector (OSTI)

In this article an application of boundary scan test at system level is analyzed. The objective is met through the description of the design and implementation options of a VME boundary scan controller board prototype and the corresponding software. ... Keywords: ATPG, IEEE 1149.1 boundary scan test, board level test and system level test

Nuno Cardoso; Carlos Beltrán Almeida; José Carlos Da Silva

2001-06-01T23:59:59.000Z

485

Heart-Rate Pacing Simulation and Control via Multiagent Systems  

E-Print Network (OSTI)

Heart-Rate Pacing Simulation and Control via Multiagent Systems Alessandro Beda 1 and Nicola Gatti system of heart rate, but the results are so poor that the use of such models in commercial pacemakers evaluation. In litera- ture several techniques are adopted to combine models; for instance, in heart

Gatti, Nicola

486

STOCHASTIC CONTROL FOR DISTRIBUTED SYSTEMS WITH APPLICATIONS TO WIRELESS  

E-Print Network (OSTI)

STOCHASTIC CONTROL FOR DISTRIBUTED SYSTEMS WITH APPLICATIONS TO WIRELESS COMMUNICATIONS Minyi Huang Departement of Electrical and Computer Engineering McGill University, Montr´eal June 2003 A Thesis submitted and optimization of distributed stochastic systems motivated by current wireless applications. In wireless

Huang, Minyi

487

Elements of Information Theory for Networked Control Systems  

E-Print Network (OSTI)

-scale systems using digital technology and interacting with the physical world. These include energy systems, communi- cation, and control technologies, to respond to the increased societal need to build large where the generation, transmission, and distribution of energy is made more efficient through

Franceschetti, Massimo

488

The Center for Control, Dynamical Systems, and Computation Spring Seminars  

E-Print Network (OSTI)

filter. These schemes are first applied to a vehicle health monitoring system evaluated in realThe Center for Control, Dynamical Systems, and Computation Spring Seminars Presents Theory and Practice of Fault Detection and Identification by Professor Jason Speyer Mechanical and Aerospace

Akhmedov, Azer

489

Voltage controlled stand-alone microhydro induction generator system  

Science Journals Connector (OSTI)

The paper discusses simulated control cases of the wound rotor self-excited induction generator WRSEIG. The generator external controller is designed to regulate the output voltage and frequency for constant or variable speed operation of the prime mover and has the inherent capability of protecting the load from short circuit, which permits voltage collapse under heavy loads. WRSEIG is self-excited using one set of excitation capacitance connected across the generator stator side. At the rotor side, a PWM controlled resistor is connected to the rotor windings through the rotating slips and act as a slip power controller. The controller can be configured to regulate the voltage as the speed or the load changes. The presented system has the capability to generate good quality AC power source with minimum controlling elements and can operate under constant or adjustable prime mover speed that suits many microhydro electricity-generating plants.

K.A. Nigim

2005-01-01T23:59:59.000Z

490

Effects of intentional threats to power substation control systems  

Science Journals Connector (OSTI)

Power station control and management systems represent key elements for guaranteeing the security of the power grid infrastructure. Intrinsically conceived to support the continuous provision of power in secure conditions, those systems today make intensive use of information and communication systems and are therefore exposed to related accidental and intentional cyber threats. This paper describes a simulation of cyber attacks conducted in the CESI RICERCA laboratory testbed on a prototypical substation control infrastructure with the purpose of testing their feasibility and illustrating their impact on the control system services. A set of attack scenarios targeting several subsystems has been experimented, with different simulated threat motivations and different degrees of impact on the global substation service. The paper reports some considerations about the consequences of the implemented attacks, focusing on different facets of the problem, in an effort to elucidate the full significance of the potential cyber threats.

Giovanna Dondossola; Judit Szanto; Marcelo Masera; Igor Nai Fovino

2008-01-01T23:59:59.000Z

491

Santa Cruz County - Solar Access Protection | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Cruz County - Solar Access Protection Cruz County - Solar Access Protection Santa Cruz County - Solar Access Protection < Back Eligibility Commercial Industrial Residential Program Info State California Program Type Solar/Wind Access Policy Provider County of Santa Cruz Although the California Solar Rights Act of 1978 requires local governments to plan for future passive or natural heating or cooling opportunities in new residential construction, and the California Shade Control Act protects solar systems from shading by vegetation, current state and local laws do not protect installed solar energy systems from shading caused by structures. The County of Santa Cruz has developed a process for registering solar energy systems to provide additional protection to solar energy system owners. The County's Building Regulations Code requires that any obstructions of

492

Thaw flow control for liquid heat transport systems  

DOE Patents (OSTI)

In a liquid metal heat transport system including a source of thaw heat for use in a space reactor power system, the thaw flow throttle or control comprises a fluid passage having forward and reverse flow sections and a partition having a plurality of bleed holes therein to enable fluid flow between the forward and reverse sections. The flow throttle is positioned in the system relatively far from the source of thaw heat.

Kirpich, Aaron S. (Broomall, PA)

1989-01-01T23:59:59.000Z

493

Project Profile: Heliostat System with Wireless Closed-Loop Control  

Energy.gov (U.S. Department of Energy (DOE))

Thermata, under the 2012 SunShot Concentrating Solar Power (CSP) R&D funding opportunity announcement (FOA), is demonstrating a collector system with enhanced optical tracking capability. The unit includes a control system that provides real-time information to adjust the location of the reflected sunlight. It demonstrates a prototype heliostat system that meets the cost, performance, and reliability objectives of the SunShot Initiative.

494

Design and Validation of Safety Cruise Control System for Automobiles  

E-Print Network (OSTI)

In light of the recent humongous growth of the human population worldwide, there has also been a voluminous and uncontrolled growth of vehicles, which has consequently increased the number of road accidents to a large extent. In lieu of a solution to the above mentioned issue, our system is an attempt to mitigate the same using synchronous programming language. The aim is to develop a safety crash warning system that will address the rear end crashes and also take over the controlling of the vehicle when the threat is at a very high level. Adapting according to the environmental conditions is also a prominent feature of the system. Safety System provides warnings to drivers to assist in avoiding rear-end crashes with other vehicles. Initially the system provides a low level alarm and as the severity of the threat increases the level of warnings or alerts also rises. At the highest level of threat, the system enters in a Cruise Control Mode, wherein the system controls the speed of the vehicle by controlling t...

Aghav, Jagannath

2011-01-01T23:59:59.000Z

495

Evaluation of industrial combustion control systems. Final report  

SciTech Connect

This study evaluated O/sub 2/ and CO monitoring systems used for combustion controls to provide reliable data on their performance, operating range and accuracy. The study concentrated on three in-situ O/sub 2/ and two in-situ CO monitoring systems which are applicable to furnace and boiler controls. The project provides technical information for cost/benefit analysis of combustion control systems and to help expedite implementation of combustion control technology by industry. The evaluation of the stack gas monitoring systems was carried out for ranges of furnace operating parameters such as fuel to air mixture ratio, burner firing rate, heat extraction rate, fuel type, combustion air preheat temperature, and cyclic operating conditions, which are based on information gathered from typical operational practices of representative industrial furnaces and boilers. The experiments were performed in the NBS experimental furnace under both natural gas and No. 2 fuel oil fired conditions. An on-line gas sampling/analysis system was used as a reference system for comparative evaluation of the stack gas monitors. The system is set up to determine the level of CO, CO/sub 2/, O/sub 2/, NO/NO/sub x/ and total hydrocarbons in the stack gases.

Presser, C.; Semerjian, H.G.

1984-10-01T23:59:59.000Z

496

Control system for a vertical-axis windmill  

DOE Patents (OSTI)

A vertical-axis windmill having a rotating structure is provided with a series of articulated vertical blades whose positions are controlled to maintain a constant RPM for the rotating structure, when wind speed is sufficient. A microprocessor controller is used to process information on wind speed, wind direction and RPM of the rotating structure to develop an electrical signal for establishing blade position. The preferred embodiment of the invention, when connected to a utility grid, is designed to generate 40 kilowatts of power when exposed to a 20 mile per hour wind. The control system for the windmill includes electrical blade actuators that modulate the blades of the rotating structure. Blade modulation controls the blade angle of attack, which in turn controls the RPM of the rotor. In the preferred embodiment, the microprocessor controller provides the operation logic and control functions. A wind speed sensor provides inputs to start or stop the windmill, and a wind direction sensor is used to keep the blade flip region at 90 and 270/sup 0/ to the wind. The control system is designed to maintain constant rotor RPM when wind speed is between 10 and 40 miles per hour.

Brulle, R.V.

1981-09-03T23:59:59.000Z

497

6 - Control systems for AC variable speed drives  

Science Journals Connector (OSTI)

Publisher Summary This chapter explores the control system, embodied in the control circuits. The simplest method of providing auxiliary power to the converter control circuits is from an auxiliary transformer connected to the mains. The primary need for current feedback in general purpose variable speed drives (VSDs) is inverter switching device protection. Various disadvantages of the vector controlled AC drive as compared to a DC drive are discussed in the chapter. The strategy of an AC vector control drive is to calculate the individual current vectors to eventually enable separate control of the flux current and the torque current under all speed and load conditions. The power circuit for a vector converter is almost identical to that used by a variable voltage variable frequency (VVVF) drive. High accuracy motor current feedback is also necessary to provide control of motor torque. DC bus current feedback is suitable for switching device protection and current limiting in most AC VSDs. Analog speed transducers are increasingly being replaced by digital devices, which are more compatible with modern digital control systems.

Malcolm Barnes

2003-01-01T23:59:59.000Z

498

Parallelized Distributed Embedded Control System for 2D Walking Robot for Studying Rough Terrain Locomotion  

E-Print Network (OSTI)

, parallelized, embedded control system was developed to provide the control structure for the Jaywalker. This system was chosen for its ability to execute simultaneous tasks efficiently. The two level control system provides a first level to implement a higher...

Strunk, Gavin

2010-12-10T23:59:59.000Z

499

SRF Test Areas Cryogenic System Controls Graphical User Interface  

SciTech Connect

Fermi National Accelerator Laboratory has constructed a superconducting 1.3 GHz cavity test facility at Meson Detector Building (MDB) and a superconducting 1.3 GHz cryomodule test facility located at the New Muon Lab Building (NML). The control of these 2K cryogenic systems is accomplished by using a Synoptic graphical user interface (GUI) to interact with the underlying Fermilab Accelerator Control System. The design, testing and operational experience of employing the Synoptic client-server system for graphical representation will be discussed. Details on the Synoptic deployment to the MDB and NML cryogenic sub-systems will also be discussed. The implementation of the Synoptic as the GUI for both NML and MDB has been a success. Both facilities are currently fulfilling their individual roles in SCRF testing as a result of successful availability of the cryogenic systems. The tools available for creating Synoptic pages will continue to be developed to serve the evolving needs of users.

DeGraff, B.D.; Ganster, G.; Klebaner, A.; Petrov, A.D.; Soyars, W.M.; /Fermilab

2011-06-09T23:59:59.000Z

500

Beamline Control and Instrumentation System using Industrial Interface Techniques  

SciTech Connect

How should a beamline be designed, which satisfies the needs and requirements of scientists and is easy to build and operate? Today, most control and instrumentation systems for beamlines are based on scientific requirements. Scientific details of the beamline, e.g. vacuum and beam physics details; are usually extensively described. However, control system specifications are often reduced to few requirements, e.g. which beam-related device to use. Lots of these systems work perfectly from the physicist's point of view, but are hard to bring into service and operate and difficult to extend with additional equipment. To overcome this, the engineering company ENZ has developed components using industrial standard interfaces to guarantee high flexibility for equipment extension. Using special interface boards and galvanic isolation offers increased stability of motion control axes. This saves resources during commissioning and service. A control system was developed and installed at a Soft-X-ray beamline at ASP Melbourne. It is operated under EPICs on distributed embedded IOC's based on PC-hardware. Motion and vacuum systems, measurement devices, e.g. a Low-Current Monitor (LoCuM) for beam position monitoring, and parts of the equipment protection system were developed and most of them tested in cooperation with DELTA at the Technical University of Dortmund.

Enz, F. [ENZ Engineering company for environmental electronic and automation, F.-Woehler-Str. 2, 12489 Berlin (Germany)

2010-06-23T23:59:59.000Z