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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.


1

ARCS – Access Rate Control System  

protected steel housing. ... Access Rate Control System This rugged, maintenance- ... Y-12 is seeking an industry partner to fully com-

2

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

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

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...

3

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

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

2: Cisco Security Advisory: Cisco Secure Access Control System Unauthorized Password Change Vulnerability T-592: Cisco Security Advisory: Cisco Secure Access Control System...

4

Questions_and_Answers_on_the_New_Access_Control_System  

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

Questions and Answers on the New Access Control System for HQ Security Areas September 15, 2010 Question: Why is the current access control system to security areas being changed?...

5

Access Rate Control System | Y-12 National Security Complex  

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

Access Rate Control System Access Rate Control System The mp4 video format is not supported by this browser. Download video Captions: On Time: 4:03 min Developed to support...

6

ACCESS CONTROL  

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

TERMSDEFINITIONS FROM DOE M 470.4-7 ACCESS CONTROL. The process of permitting access or denying access to information, facilities, nuclear materials, resources, or designated...

7

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

8

Risk-based access control systems built on fuzzy inferences  

Science Conference Proceedings (OSTI)

Fuzzy inference is a promising approach to implement risk-based access control systems. However, its application to access control raises some novel problems that have not been yet investigated. First, because there are many different fuzzy operations, ... Keywords: access control, fuzzy inference, risk

Qun Ni; Elisa Bertino; Jorge Lobo

2010-04-01T23:59:59.000Z

9

Speed control system for an access gate  

DOE Patents (OSTI)

An access control apparatus for an access gate. The access gate typically has a rotator that is configured to rotate around a rotator axis at a first variable speed in a forward direction. The access control apparatus may include a transmission that typically has an input element that is operatively connected to the rotator. The input element is generally configured to rotate at an input speed that is proportional to the first variable speed. The transmission typically also has an output element that has an output speed that is higher than the input speed. The input element and the output element may rotate around a common transmission axis. A retardation mechanism may be employed. The retardation mechanism is typically configured to rotate around a retardation mechanism axis. Generally the retardation mechanism is operatively connected to the output element of the transmission and is configured to retard motion of the access gate in the forward direction when the first variable speed is above a control-limit speed. In many embodiments the transmission axis and the retardation mechanism axis are substantially co-axial. Some embodiments include a freewheel/catch mechanism that has an input connection that is operatively connected to the rotator. The input connection may be configured to engage an output connection when the rotator is rotated at the first variable speed in a forward direction and configured for substantially unrestricted rotation when the rotator is rotated in a reverse direction opposite the forward direction. The input element of the transmission is typically operatively connected to the output connection of the freewheel/catch mechanism.

Bzorgi, Fariborz M. (Knoxville, TN)

2012-03-20T23:59:59.000Z

10

ESCORT: a decentralized and localized access control system for mobile wireless access to secured domains  

Science Conference Proceedings (OSTI)

In this work we design and implement ESCORT, a backward compatible, efficient, and secure access control system, to facilitate mobile wireless access to secured wireless LANs. In mobile environments, a mobile guest may frequently ... Keywords: decentralized access control, identity privacy, location privacy, mobile privacy, wireless security

Jiejun Kong; Shirshanka Das; Edward Tsai; Mario Gerla

2003-09-01T23:59:59.000Z

11

A static type system for JVM access control  

Science Conference Proceedings (OSTI)

This paper presents a static type system for JAVA Virtual Machine (JVM) code that enforces an access control mechanism similar to the one found, for example, in a JAVA implementation. In addition to verifying type consistency of a given JVM code, the ... Keywords: JVM, access control, stack inspection, type inference, type system

Tomoyuki Higuchi; Atsushi Ohori

2003-08-01T23:59:59.000Z

12

SPEED CONTROL SYSTEM FOR AN ACCESS GATE - Energy Innovation Portal  

An access control apparatus for an access gate. The access gate typically has a rotator that is configured to rotate around a rotator axis at a first ...

13

Role Based Access Control System in the ATLAS Experiment  

E-Print Network (OSTI)

The complexity of the ATLAS experiment motivated the deployment of an integrated Access Control System in order to guarantee safe and optimal access for a large number of users to the various software and hardware resources. Such an integrated system was foreseen since the design of the infrastructure and is now central to the operations model. In order to cope with the ever growing needs of restricting access to all resources used within the experiment, the Roles Based Access Control (RBAC) previously developed has been extended and improved. The paper starts with a short presentation of the RBAC design, implementation and the changes made to the system to allow the management and usage of roles to control access to the vast and diverse set of resources. The paper continues with a detailed description of the integration across all areas of the system: local Linux and Windows nodes in the ATLAS Control Network (ATCN), the Linux application gateways offering remote access inside ATCN, the Windows Terminal Serv...

Valsan, M L; The ATLAS collaboration; Lehmann Miotto, G; Scannicchio, D A; Schlenker, S; Filimonov, V; Khomoutnikov, V; Dumitru, I; Zaytsev, A S; Korol, A A; Bogdantchikov, A; Avolio, G; Caramarcu, C; Ballestrero, S; Darlea, G L; Twomey, M; Bujor, F

2010-01-01T23:59:59.000Z

14

Role Based Access Control system in the ATLAS experiment  

E-Print Network (OSTI)

The complexity of the ATLAS experiment motivated the deployment of an integrated Access Control System in order to guarantee safe and optimal access for a large number of users to the various software and hardware resources. Such an integrated system was foreseen since the design of the infrastructure and is now central to the operations model. In order to cope with the ever growing needs of restricting access to all resources used within the experiment, the Roles Based Access Control (RBAC) previously developed has been extended and improved. The paper starts with a short presentation of the RBAC design, implementation and the changes made to the system to allow the management and usage of roles to control access to the vast and diverse set of resources. The paper continues with a detailed description of the integration across all areas of the system: local Linux and Windows nodes in the ATLAS Control Network (ATCN), the Linux application gateways offering remote access inside ATCN, the Windows Terminal Serv...

Valsan, M L; The ATLAS collaboration; Lehmann Miotto, G; Scannicchio, D A; Schlenker, S; Filimonov, V; Khomoutnikov, V; Dumitru, I; Zaytsev, A S; Korol, A A; Bogdantchikov, A; Caramarcu, C; Ballestrero, S; Darlea, G L; Twomey, M; Bujor, F

2011-01-01T23:59:59.000Z

15

Towards accuracy of role-based access control configurations in component-based systems  

Science Conference Proceedings (OSTI)

Access control is a common concern in most software applications. In component-based systems, although developers can implement access control requirements (ACRs) by simply declaring role-based access control configurations (ACCs) of components, it is ... Keywords: Access control, Accuracy, Component-based system, Software architecture

Lianshan Sun; Gang Huang

2011-03-01T23:59:59.000Z

16

A Fault-Tolerant Emergency-Aware Access Control Scheme for Cyber-Physical Systems  

E-Print Network (OSTI)

Access control is an issue of paramount importance in cyber-physical systems (CPS). In this paper, an access control scheme, namely FEAC, is presented for CPS. FEAC can not only provide the ability to control access to data in normal situations, but also adaptively assign emergency-role and permissions to specific subjects and inform subjects without explicit access requests to handle emergency situations in a proactive manner. In FEAC, emergency-group and emergency-dependency are introduced. Emergencies are processed in sequence within the group and in parallel among groups. A priority and dependency model called PD-AGM is used to select optimal response-action execution path aiming to eliminate all emergencies that occurred within the system. Fault-tolerant access control polices are used to address failure in emergency management. A case study of the hospital medical care application shows the effectiveness of FEAC.

Wu, Guowei; Xia, Feng; Yao, Lin

2012-01-01T23:59:59.000Z

17

Modeling Complex Control Systems to Identify Remotely Accessible Devices Vulnerable to Cyber Attack1  

E-Print Network (OSTI)

Modeling Complex Control Systems to Identify Remotely Accessible Devices Vulnerable to Cyber Attack Acquisition (SCADA) systems that allows us to calculate device vulnerability and help power substation vulnerable to cyber attack. We use graph theory to model electric power control and protection devices

Krings, Axel W.

18

Role Based Access Control  

Science Conference Proceedings (OSTI)

... Nash and Poland [10] discuss the application of role based access control to cryptographic authentication devices commonly used in the banking ...

19

Access Control: Policies, Models, and Mechanisms  

Science Conference Proceedings (OSTI)

Access control is the process of mediating every request to resources and data maintained by a system and determining whether the request should be granted or denied. The access control decision is enforced by a mechanism implementing regulations established ...

Pierangela Samarati; Sabrina De Capitani di Vimercati

2000-09-01T23:59:59.000Z

20

A systematic approach to static access control  

Science Conference Proceedings (OSTI)

The Java Security Architecture includes a dynamic mechanism for enforcing access control checks, the so-called stack inspection process. While the architecture has several appealing features, access control checks are all implemented via dynamic ... Keywords: Type systems, access control, stack inspection

François Pottier; Christian Skalka; Scott Smith

2005-03-01T23:59:59.000Z

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.


21

T-592: Cisco Security Advisory: Cisco Secure Access Control System Unauthorized Password Change Vulnerability  

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

Cisco Secure ACS operates as a centralized RADIUS and TACACS+ server, combining user authentication, user and administrator device access control, and policy control into a centralized identity networking solution.

22

Flexible access control for javascript  

Science Conference Proceedings (OSTI)

Providing security guarantees for systems built out of untrusted components requires the ability to define and enforce access control policies over untrusted code. In Web 2.0 applications, JavaScript code from different origins is often combined on a ... Keywords: delimited histories, javascript, same-origin policy, security

Gregor Richards, Christian Hammer, Francesco Zappa Nardelli, Suresh Jagannathan, Jan Vitek

2013-10-01T23:59:59.000Z

23

M.: Organization Modelling to Support Access Control for Collaborative Systems. Software Engineering Research and Practice  

E-Print Network (OSTI)

Abstract- One of the most important characteristics of current enterprise systems is the existence of collaborative processes where different users/subsystems communicate and cooperate in order to carry out common activities. In these processes, shared resources are often used and there are complex relationships between activities and users, so the definition and administration of different security levels (tasks, users, resources) is necessary. In this article, we shall focus on an important dimension related to the security aspect of collaborative systems: access control. We shall use an organization model that considers the necessary elements to represent the authorization and access control aspects in collaborative systems. This model is used in a serviceoriented architecture (SOA) in order to facilitate the implementation of a service responsible for these important functions. Finally, we shall propose the use of a pattern definition language at a conceptual level to facilitate the modelling of the organizational structures of a system. We shall define organization patterns that will help us define general models which can be applied in different situations.

F. L. Gutiérrez Vela; J. L. Isla Montes; P. Paderewski Rodríguez; M. Sánchez Román

2006-01-01T23:59:59.000Z

24

Access Control Policy Tool (ACPT)  

Science Conference Proceedings (OSTI)

... In regard to cyber security, privacy, and information sharing, access control is one of the crucial elements in protecting the nation's critical IT ...

2013-01-15T23:59:59.000Z

25

Internal Controls Over Sensitive Compartmented Information Access...  

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

Controls Over Sensitive Compartmented Information Access for Selected Field Intelligence Elements, IG-0796 Internal Controls Over Sensitive Compartmented Information Access...

26

XML access control using static analysis  

Science Conference Proceedings (OSTI)

Access control policies for XML typically use regular path expressions such as XPath for specifying the objects for access-control policies. However such access-control policies are burdens to the query engines for XML documents. To relieve this burden, ... Keywords: Access control, XML, XPath, XQuery, automaton, query optimization, schema, static analysis, value-based access control, view schema

Makoto Murata; Akihiko Tozawa; Michiharu Kudo; Satoshi Hada

2006-08-01T23:59:59.000Z

27

Trading in risk: using markets to improve access control  

Science Conference Proceedings (OSTI)

With the increasing need to securely share information, current access control systems are proving too in flexible and difficult to adapt. Recent work on risk-based access control systems has shown promise at resolving the inadequacies of traditional ... Keywords: market, risk, risk-based access control

Ian Molloy; Pau-Chen Cheng; Pankaj Rohatgi

2009-08-01T23:59:59.000Z

28

Remote Access of Computer Controlled Experiments.  

E-Print Network (OSTI)

??In this paper, we present a way for students to access and operate laboratory equipment, controlled by a laboratory computer via a remote access program.… (more)

Nilsson, Kristian; Zackrisson, Johan

2008-01-01T23:59:59.000Z

29

A theory for comparing the expressive power of access control models  

Science Conference Proceedings (OSTI)

We present a theory for comparing the expressive power of access control models. The theory is based on simulations that preserve security properties. We perceive access control systems as state-transition systems and present two kinds of simulations, ... Keywords: Access control, access matrix, discretionary access control, expressive power, reduction, role-based access control, state-matching reduction, trust management

Mahesh V. Tripunitara; Ninghui Li

2007-04-01T23:59:59.000Z

30

A propositional policy algebra for access control  

Science Conference Proceedings (OSTI)

Security-sensitive environments protect their information resources against unauthorized use by enforcing access control mechanisms driven by access control policies. Due to the need to compare, contrast, and compose such protected information resources, ... Keywords: Access control, policy algebra, policy composition, security policy

Duminda Wijesekera; Sushil Jajodia

2003-05-01T23:59:59.000Z

31

Mission-Aware Medium Access Control in Random Access Networks  

E-Print Network (OSTI)

We study mission-critical networking in wireless communication networks, where network users are subject to critical events such as emergencies and crises. If a critical event occurs to a user, the user needs to send necessary information for help as early as possible. However, most existing medium access control (MAC) protocols are not adequate to meet the urgent need for information transmission by users in a critical situation. In this paer, we propose a novel class of MAC protocols that utilize available past information as well as current information. Our proposed protocols are mission-aware since they prescribe different transmission decision rules to users in different situations. We show that the proposed protocols perform well not only when the system faces a critical situation but also when there is no critical situation. By utilizing past information, the proposed protocols coordinate transmissions by users to achieve high throughput in the normal phase of operation and to let a user in a critical ...

Park, Jaeok

2009-01-01T23:59:59.000Z

32

Survey of Substation Equipment Access Control Policies  

Science Conference Proceedings (OSTI)

Utility management and control of access to substations and equipment can help prevent not only unauthorized access by outside agents with ill intent, but also erroneous access to, or erroneous operation of, utility equipment by utility personnel.  This report provides the results of an EPRI–sponsored research project to identify how utilities manage access to transmission and distribution substations and equipment. BackgroundThe enhanced ...

2012-11-20T23:59:59.000Z

33

Efficient and robust multiple access control for wireless multimedia services  

Science Conference Proceedings (OSTI)

In this paper, we propose a new multiple access control (MAC) protocol for wireless distributed multimedia systems based on ATM, in which user demands are highly heterogeneous and can be classified as CBR, VBR, and ABR. Our protocol is motivated by two ... Keywords: FDD, TDMA, adaptive protocol, multiple access control, wireless ATM, wireless multimedia

Yu-Kwong Kwok; Vincent K. N. Lau

2000-10-01T23:59:59.000Z

34

A transformation contract to generate aspects from access control policies  

Science Conference Proceedings (OSTI)

Access control is an important security issue. It has been addressed since the late 1960s in the early time-sharing computer systems. Many access control models have been proposed since than but of particular interest is Ferraiolo and Khun's role-based ...

Christiano Braga

2011-07-01T23:59:59.000Z

35

Distributed user access control in sensor networks  

Science Conference Proceedings (OSTI)

User access control in sensor networks defines a process of granting user the access right to the information and resources. It is essential for the future real sensor network deployment in which sensors may provide users with different services in terms ...

Haodong Wang; Qun Li

2006-06-01T23:59:59.000Z

36

An Access Definition and Query Language : Towards a Unified Access Control Model.  

E-Print Network (OSTI)

??In this work we suggest a meta access control model emulating established access control models by configuration and offering enhanced features like the delegation of… (more)

Sonnenbichler, Andreas

2013-01-01T23:59:59.000Z

37

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

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

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

38

An access control model for dynamic client-side content  

Science Conference Proceedings (OSTI)

The focus of access control in client/server environments is on protecting sensitive server resources by determining whether or not a client is authorized to access those resources. The set of resources are usually static, and an access control policy ... Keywords: access control, authentication, credentials, trust negotiation

Adam Hess; Kent E. Seamons

2003-06-01T23:59:59.000Z

39

Nephele: Scalable Access Control for Federated File Services  

Science Conference Proceedings (OSTI)

The integration of storage resources across different administrative domains can serve as building block for the development of efficient collaboration environments. In order to improve application portability across such environments, we target data ... Keywords: Access control, Analytical evaluation, Decentralization, Distributed systems, File services, Performance measurements, Security

Giorgos Margaritis; Andromachi Hatzieleftheriou; Stergios V. Anastasiadis

2013-03-01T23:59:59.000Z

40

JXTA resource access control by means of advertisement encryption  

Science Conference Proceedings (OSTI)

JXTA is an open-source initiative that provides a middleware for the creation and deployment of peer-to-peer (P2P) applications. Resources in a JXTA network are accessed through advertisements, special metadata documents published by its owner. By controlling ... Keywords: Distributed systems, JXTA, Peer group, Peer-to-peer, Privacy, Security, XMLenc

Joan Arnedo-Moreno; Jordi Herrera-Joancomartí

2010-01-01T23:59:59.000Z

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.


41

Parallel Systems Laboratory: Access, allocation, and control. Final technical report, 1 Jul 87-30 Jun 92  

SciTech Connect

The contents include: task I - fundamental tools and issues in parallel processing systems; task II - parallel processing architecture and algorithm design; task III - migrating and adaptive processes; task IV- distributed data base; task V - tightly coupled parallel processing systems; task VI - experimentation in parallel systems.

Kleinrock, L.

1992-06-30T23:59:59.000Z

42

Oblivious transfer with complex attribute-based access control  

Science Conference Proceedings (OSTI)

In this paper, we present oblivious transfer with complex attribute-based access control policies. The protocol allows a database server to directly enforce "and" and "or" access control policies (c11 ? c12 ... Keywords: access control, attribute-based encryption, oblivious transfer

Lingling Xu; Fangguo Zhang

2010-12-01T23:59:59.000Z

43

ASSIST: access controlled ship identification streams  

Science Conference Proceedings (OSTI)

The International Maritime Organization (IMO) requires a majority of cargo and passenger ships to use the Automatic Identification System (AIS) for navigation safety and traffic control. Distributing live AIS data on the Internet can offer a global view ...

Baljeet Malhotra; Wee-Juan Tan; Jianneng Cao; Thomas Kister; Stéphane Bressan; Kian-Lee Tan

2011-11-01T23:59:59.000Z

44

Query Evaluation in the Presence of Fine-grained Access Control.  

E-Print Network (OSTI)

??Access controls are mechanisms to enhance security by protecting data from unauthorized accesses. In contrast to traditional access controls that grant access rights at the… (more)

Zhang, Huaxin

2008-01-01T23:59:59.000Z

45

Achieving distributed user access control in sensor networks  

Science Conference Proceedings (OSTI)

User access control in sensor networks defines a process of granting user an access right to the stored information. It is essential for future real sensor network deployment in which sensors may provide users with different services in terms of data ... Keywords: Elliptic Curve Cryptography, Public key cryptography, Sensor networks, User access control

Haodong Wang; Qun Li

2012-05-01T23:59:59.000Z

46

Foundation for a time interval access control model  

Science Conference Proceedings (OSTI)

A new model for representing temporal access control policies is introduced. In this model, temporal authorizations are represented by time attributes associated with both subjects and objects, and a “time interval access graph.” The time ...

Francis B. Afinidad; Timothy E. Levin; Cynthia E. Irvine; Thuy D. Nguyen

2005-09-01T23:59:59.000Z

47

Femtocell access control strategy in UMTS and LTE  

Science Conference Proceedings (OSTI)

Femtocells have become an attractive device for operators to offer extended services on their licensed UMTS/LTE spectrum. In this article we focus on the access control strategy -- a crucial aspect for operators to give preferential access to femtocells ...

Assen Golaup; Mona Mustapha; Leo Boonchin Patanapongpibul

2009-09-01T23:59:59.000Z

48

Reading Systems for eBooks Need to Become Accessible  

Science Conference Proceedings (OSTI)

Reading Systems for eBooks Need to Become Accessible. While the Publication Structure 1.0 spec is accessible, the reading systems are not. ...

2001-05-25T23:59:59.000Z

49

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

50

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

51

Efficient IRM enforcement of history-based access control policies  

Science Conference Proceedings (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

52

ACConv -- An Access Control Model for Conversational Web Services  

Science Conference Proceedings (OSTI)

With organizations increasingly depending on Web services to build complex applications, security and privacy concerns including the protection of access control policies are becoming a serious issue. Ideally, service providers would like to make sure ... Keywords: Web services, access control, conversations

Federica Paci; Massimo Mecella; Mourad Ouzzani; Elisa Bertino

2011-07-01T23:59:59.000Z

53

Windows Access Control Demystified Sudhakar Govindavajhala and Andrew W. Appel  

E-Print Network (OSTI)

ACM Conference on Computer and Communications Security, Washington, DC, November 2002. [2] R. BaldwinWindows Access Control Demystified Sudhakar Govindavajhala and Andrew W. Appel Princeton University of a single host with commonly used software. We have constructed a logical model of Windows XP access control

Appel, Andrew W.

54

Safety testing for LHC access system  

E-Print Network (OSTI)

In the domain of Safety Real-Time Systems the problem of testing represents always a big effort in terms of time, costs and efficiency to guarantee an adequate coverage degree. Exhaustive tests may, in fact, not be practicable for large and distributed systems. This paper describes the testing process followed during the validation of the CERN's LHC Access System [1], responsible for monitoring and preventing physical risks for the personnel accessing the underground areas. In the paper we also present a novel strategy for the testing problem, intended to drastically reduce the time for the test patterns generation and execution. In particular, we propose a methodology for blackbox testing that relies on the application of Model Checking techniques. Model Checking is a formal method from computer science, commonly adopted to prove correctness of systemâ??s models through an automatic systemâ??s state space exploration against some property formulas.

Valentini, F; Ninin, P; Scibile, S

2008-01-01T23:59:59.000Z

55

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

56

Attribute Based Access Control (ABAC) Workshop Minutes ...  

Science Conference Proceedings (OSTI)

... Move – Dynamically Controlling and Protecting Classified Data • Ms. Sandy Trumbull, CA Technologies Wrap Up By Mr ...

2013-08-07T23:59:59.000Z

57

Control of Information Distribution and Access  

E-Print Network (OSTI)

the delivery of this thesis with me during the last years: the system administrators in Adliswil, etc . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 121 5.3.1. System Administrator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 122 5.4.2. Operating System Developer

58

Securing information gateways with derivation-constrained access control  

Science Conference Proceedings (OSTI)

In pervasive computing environments, information gateways derive specific information, such as a person's location, from raw data provided by a service, such as a videostream offered by a camera. Here, access control to confidential raw data provided ...

Urs Hengartner; Peter Steenkiste

2006-04-01T23:59:59.000Z

59

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

60

CONTROL SYSTEM  

DOE Patents (OSTI)

A boiling water type nuclear reactor power system having improved means of control is described. These means include provisions for either heating the coolant-moderator prior to entry into the reactor or shunting the coolantmoderator around the heating means in response to the demand from the heat engine. These provisions are in addition to means for withdrawing the control rods from the reactor. (AEC)

Shannon, R.H.; Williamson, H.E.

1962-10-30T23:59:59.000Z

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

On Testing for Absence of Rights in Access Control Models  

E-Print Network (OSTI)

The well-known access control model formalized by Harrison, Ruzzo, and Ullman (HRU) does not allow testing for absence of access rights in its commands. Sandhu's Typed Access Matrix (TAM) model, which introduces strong typing into the HRU model, continues this tradition. Ammann and Sandhuhave recently proposed an extension of TAM called augmented TAM (ATAM), which allows testing for absence of rights. The motivation for ATAM is to express policies for dynamic separation of duties based on transaction control expressions. In this paper we study the question of whether or not testing for absence of access rights adds fundamental expressive power. We show that TAM and ATAM are formally equivalent in their expressive power. However, our construction indicates that while testing for absence of rights is theoretically unnecessary, such testing appears to be practically beneficial.

Ravi S. Sandhu; Srinivas Ganta

1993-01-01T23:59:59.000Z

62

Control systems under attack?  

E-Print Network (OSTI)

The enormous growth of the Internet during the last decade offers new means to share and distribute both information and data. In Industry, this results in a rapprochement of the production facilities, i.e. their Process Control and Automation Systems, and the data warehouses. At CERN, the Internet opens the possibility to monitor and even control (parts of) the LHC and its four experiments remotely from anywhere in the world. However, the adoption of standard IT technologies to Distributed Process Control and Automation Systems exposes inherent vulnerabilities to the world. The Teststand On Control System Security at CERN (TOCSSiC) is dedicated to explore the vulnerabilities of arbitrary Commercial-Of-The-Shelf hardware devices connected to standard Ethernet. As such, TOCSSiC should discover their vulnerabilities, point out areas of lack of security, and address areas of improvement which can then be confidentially communicated to manufacturers. This paper points out risks of accessing the Control and Automa...

Lüders, Stefan

2005-01-01T23:59:59.000Z

63

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

64

Controlling access to the Internet: The role of filtering  

Science Conference Proceedings (OSTI)

Controlling access to the Internet by means of filtering software has become a growth industry in the U.S. and elsewhere. Its use has increased as the mandatory response to the current plagues of society, namely, pornography, violence, hate, and ... Keywords: Internet, United States, ethics, filters, free speech, laws, libraries

R. S. Rosenberg

2001-05-01T23:59:59.000Z

65

NSLS control system upgrade status  

SciTech Connect

The NSLS control system initially installed in 1978 has undergone several modifications but the basic system architecture remained relatively unchanged. The need for faster response, increased reliability and better diagnostics made the control system upgrade a priority. Since the NSLS runs continuously, major changes to the control system are difficult. The upgrade plan had to allow continuous incremental changes to the control system without having any detrimental effect on operations. The plan had to provide for immediate improvement in a few key areas, such as data access rates, and be complete in a short time. At present, most accelerator operations utilize the upgraded control system.

Smith, J.; Ramamoorthy, S.; Tang, Y.; Flannigan, J.; Sathe, S.; Keane, J.; Krinsky, S.

1993-07-01T23:59:59.000Z

66

Design and implementation of a direct access file system (DAFS) kernel server for FreeBSD  

Science Conference Proceedings (OSTI)

The Direct Access File System (DAFS) is an emerging commercial standard for network-attached storage on server cluster interconnects. The DAFS architecture and protocol leverage network interface controller (NIC) support for user-level networking, remote ...

Kostas Magoutis

2002-02-01T23:59:59.000Z

67

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

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

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...

68

A Temporal Description Logic Based Access Control Model for Expressing History Constrained Policies in Semantic Web  

Science Conference Proceedings (OSTI)

An access control model for Semantic Web should be compatible with the corresponding semantic model. The access control procedure(s) should also take the semantic relationships between the entities (specified as ontologies) into account. Considering ... Keywords: Access Control, Description Logic, Semantic Web, History of Accesses

Fathieh Faghih; Morteza Amini; Rasool Jalili

2009-07-01T23:59:59.000Z

69

THE PUSH TOWARD GRID REGIONALIZATION IN OPEN ACCESS TRANSMISSION SYSTEMS  

E-Print Network (OSTI)

for the establishment of open access transmission in the US, while the Electricity Directive 96/92 of the European Union robust competition in wholesale electricity markets and mandate transmission-owning utilities to provideTHE PUSH TOWARD GRID REGIONALIZATION IN OPEN ACCESS TRANSMISSION SYSTEMS ProfessorGeorge Gross

Gross, George

70

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

Science Conference Proceedings (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

71

A Modular Access Control Architecture for the Earth System Grid Philip Kershaw (philip.kershaw@stfc.ac.uk) (1), Rachana Ananthakrishnan (ranantha@mcs.anl.gov) (2), Luca  

E-Print Network (OSTI)

Corporation for Atmospheric Research, Boulder, CO, USA For submission to GCA 2011 Keywords: CMIP5, ESGF, OPe for the Earth System Grid Federation (ESGF), including a standard mechanism for securing OPeNDAP (OpenCDF (Network Common Data Form) software libraries to support this paradigm. ESGF is an international

72

A temporal description logic based access control model for expressing history constrained policies in semantic web  

Science Conference Proceedings (OSTI)

An access control model for Semantic Web should be compatible with the corresponding semantic model. The access control procedure(s) should also take the semantic relationships between the entities (specified as ontologies) into account. Considering ...

Fathieh Faghih; Morteza Amini; Rasool Jalili

2009-07-01T23:59:59.000Z

73

Airborne Multisensor Pod System (AMPS) data access concept  

SciTech Connect

The purpose of this document is to provide the conceptual design for accessing data collected under the Airborne Multisensor Pod System (AMPS) program and for accessing data about that data. The purpose of the AMPS program is to provide multisensor data for data fusion research as it applies to arms control treaty verification, non-proliferation surveillance, and related programs. Secondary objectives include sensor development and technology demonstration. The program was established by the U.S. Department of Energy (DOE), Office of Arms Control and Non-proliferation (DOE/AN) and is integrated into the overall DOE AN-10.1 technology development program. The AMPS program interacts with other technology programs of DOE/NN-20. The AMPS program participants include five DOE laboratories. Four will be responsible for collecting and supplying data to AMPS data researchers: (1) Lawrence Livermore National Laboratory (LLNL); (2) Remote Sensing Laboratory (RSL); (3) Sandia National Laboratories (SNL); (4) Savannah River Technology Center (SRTC). The Pacific Northwest Laboratory (PNL), has been assigned data management responsibility for the program, which is defined as the process of planning, acquiring, organizing, qualifying and disseminating data. Data ranges from single sensor readings, to high resolution images, to video. The potential volume of data to be collected under the AMPS program will require considerable management effort. The AMPS program specifies a distributed approach for the sharing and management of AMPS data. This approach shares the burden of data distribution across the DOE laboratories, which will be responsible for AMPS instruments development and implementation and the data those instruments produce. This approach will also provide the laboratories with direct control over the distribution of the data for which they are responsible.

Jou, Jiing-Yih J.; Meitzler, W.D.

1994-10-01T23:59:59.000Z

74

Photovoltaic system planning tool with internet access  

Science Conference Proceedings (OSTI)

This paper presents advanced planning models integrated into a GIS-computational tool, based on a Geographic Information System, for evaluating solar energy resources, selecting the most suitable photovoltaic technology, and calculating the cost associated ... Keywords: distributed generation planning, internet GIS services, photovoltaic systems

I. J. Ramírez-Rosado; P. J. Zorzano-Santamaría; L. A. Fernández-Jiménez; E. García-Garrido

2007-01-01T23:59:59.000Z

75

NIST 7316, Assessment of Access Control Systems  

Science Conference Proceedings (OSTI)

... rule is called the “*-property” (pronounced “star property”) or ... COI2 may pertain to energy companies. ... application programming interface (API) [CM03 ...

2012-02-29T23:59:59.000Z

76

Role Based Access Control for the World Wide Web  

Science Conference Proceedings (OSTI)

... The other way to use RBAC/Web is to modify the UNIX Web server to call the RBAC/Web API to determine RBAC access. ...

77

Adding Attributes to Role-Based Access Control  

Science Conference Proceedings (OSTI)

... allow access if the subject is a teller working between ... Edward J. Coyne is a senior security engineer at Science ... Contact him at ed.coyne@va.gov. ...

2010-06-15T23:59:59.000Z

78

Optimal Test Access Architectures for System-on-a-Chip  

E-Print Network (OSTI)

INTRODUCTION Embedded cores are now increasingly being used in large system-on-a-chip (SOC) designs [Zorian et al. 1998]. These complex, predesigned functional blocks facilitate design reuse, allow greater on-chip functionality, and lead to shorter product development cycles. However, the manufacturing test and debug of such SOC designs remains a major challenge. Since embedded cores are not directly accessible via chip inputs and outputs, special access mechanisms are required to test them at the system level. The development of efficient test access architectures is therefore of considerable interest to the SOC design and test community. This research was supported in part by the National Science Foundation under grant CCR-9875324. An abridged version of this paper appeared in Proceedings of the IEEE VLSI Test Symposium, Montreal, Canada, May 2000, pp. 127-134. Author's address: Department of Electrical and Computer Engineering, Duke University, 130 H

Krishnendu Chakrabarty

2001-01-01T23:59:59.000Z

79

Networked Control Systems Group  

Science Conference Proceedings (OSTI)

... and deploys measurement science for sensor networks and control systems used in manufacturing, construction, and other cyber-physical systems ...

2012-08-30T23:59:59.000Z

80

Control system design method  

Science Conference Proceedings (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

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

An enhancement of the Role-Based Access Control model to facilitate information access management in context of team collaboration and workflow  

Science Conference Proceedings (OSTI)

Although information access control models have been developed and applied to various applications, few of the previous works have addressed the issue of managing information access in the combined context of team collaboration and workflow. To facilitate ... Keywords: Access control, Computation model, Computer supported cooperative work, Information management, Medical education, Workflow

Xuan Hung Le; Terry Doll; Monica Barbosu; Amneris Luque; Dongwen Wang

2012-12-01T23:59:59.000Z

82

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 ........................................................................

83

Lighting Control Systems  

Science Conference Proceedings (OSTI)

The demand for lighting control systems in residential, commercial, and industrial facilities is on the rise with the demand for increased energy savings. With lighting accounting for almost 23% of grid load, there is significant opportunity to reduce lighting load while improving the quality of light for customers. Lighting control systems are becoming more intelligent as the need for them to interface with building control systems and demand response systems also increases. Lighting control systems use...

2009-12-17T23:59:59.000Z

84

On the formalization and analysis of a spatio-temporal role-based access control model  

Science Conference Proceedings (OSTI)

With the growing use of wireless networks and mobile devices, we are moving towards an era of pervasive computing. Such environments will spawn new applications that use contextual information to provide enhanced services. Traditional access control ... Keywords: Access control model, model analysis and verification, requirements specification, security

Manachai Toahchoodee; Indrakshi Ray

2011-08-01T23:59:59.000Z

85

New User Interface Capabilities for Control Systems  

Science Conference Proceedings (OSTI)

Latest technologies promise new control system User Interface (UI) features and greater interoperability of applications. New developments using Java and Eclipse aim to unify diverse control systems and make communication between applications seamless. Web based user interfaces can improve portability and remote access. Modern programming tools improve efficiency, support testing and facilitate shared code. This paper will discuss new developments aimed at improving control system interfaces and their development environment.

Kasemir, Kay [ORNL

2009-01-01T23:59:59.000Z

86

Generalized Role-Based Access Control for Securing Future Applications  

E-Print Network (OSTI)

As computing technology becomes more pervasive and broadband services are deployed into residential communities, new applications will emerge for the home and community environment. These applications will assist people in a variety of daily activities by enabling them to create, access, and manipulate information about the residents and resources in their homes. In a connected community, resources in the home and information about the residents of the home will be remotely accessible to both residents and guests, as well as to potentially malicious users. These new applications, as well as their users and environment, pose new security challenges. The challenges stem from two factors: the nature of the home itself---a private space with a wealth of personal and sensitive information---and the limited technical knowledge and capabilities of the home's residents.

Michael Covington Matthew; Ý Matthew; J. Moyer; Mustaque Ahamad

2000-01-01T23:59:59.000Z

87

Rail Access Modes and Catchment Areas for the BART System  

E-Print Network (OSTI)

parking supplies), ridership (e.g. , rail modal splits), andof California at Berkeley Rail Access Modes and CatchmentHypothesized Distributions of Rail Station Access Modes as a

Cervero, Robert

1995-01-01T23:59:59.000Z

88

Guideline for Securing Control Systems and Corporate Network Interfaces  

Science Conference Proceedings (OSTI)

Until recent years, many electric utilities have dealt with the cyber security issues of protecting control system networks by keeping the control system and corporate system networks physically separate. Others have prohibited remote access to control system networks, requiring all connections be made onsite. While these techniques effectively protect the system from external cyber-security-based threats, they are restricting a growing requirement for access, particularly among corporate users who need ...

2005-12-05T23:59:59.000Z

89

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

90

Selective collision based medium access control protocol for proactive protection of privacy for RFID  

Science Conference Proceedings (OSTI)

RFID is rapidly being deployed because of its versatility. However, the privacy problem cannot be handled effectively because of limited capability of RFID tags. We propose a secure medium access control(MAC) protocol to solve the privacy problem. Our ...

JuSung Park; Jeonil Kang; DaeHun Nyang

2005-12-01T23:59:59.000Z

91

A Logical Representation of Common Rules for Controlling Access to Classified Information  

E-Print Network (OSTI)

Modification M840 SF-30 Continuation Page Page4 of4 Special Access Program Policies, Responsibilities INDEPENDENT OVERSIGHT AND PERFORMANCE ASSURANCE PROGRAM GRADED SECURITY PROTECTION (GPS) POLICY MATERIAL CONTROL AND ACCOUNTABILITY COUNTERINTELLIGENCE PROGRAM IDENTIFYING CLASSIFIED INFORMATION

92

Energy-efficient reservation-based medium access control protocol for wireless sensor networks  

Science Conference Proceedings (OSTI)

In Wireless Sensor Networks (WSNs), a robust and energy-efficient Medium Access Control (MAC) protocol is required for high energy efficiency in harsh operating conditions, where node and link failures are common. This paper presents the design of a ...

Mikko Kohvakka; Jukka Suhonen; Timo D. Hämäläinen; Marko Hännikäinen

2010-04-01T23:59:59.000Z

93

Specification of history based constraints for access control in conceptual level  

Science Conference Proceedings (OSTI)

An access control model for Semantic Web should take the semantic relationships among the entities, defined in the abstract conceptual level (i.e., ontology level), into account. Authorization and policy specification based on a logical model let us ...

Fathiyeh Faghih; Morteza Amini; Rasool Jalili

2010-12-01T23:59:59.000Z

94

Stepping Motor Control System  

E-Print Network (OSTI)

This paper describes a hardware system designed to facilitate position and velocity control of a group of eight stepping motors using a PDP-11. The system includes motor driver cards and other interface cards in addition ...

Larson, Noble G.

95

A Security Architecture for Data Aggregation and Access Control in Smart Grids  

E-Print Network (OSTI)

We propose an integrated architecture for smart grids, that supports data aggregation and access control. Data can be aggregated by home area network, building area network and neighboring area network in such a way that the privacy of customers is protected. We use homomorphic encryption technique to achieve this. The consumer data that is collected is sent to the substations where it is monitored by remote terminal units (RTU). The proposed access control mechanism gives selective access to consumer data stored in data repositories and used by different smart grid users. Users can be maintenance units, utility centers, pricing estimator units or analyzing and prediction groups. We solve this problem of access control using cryptographic technique of attribute-based encryption. RTUs and users have attributes and cryptographic keys distributed by several key distribution centers (KDC). RTUs send data encrypted under a set of attributes. Users can decrypt information provided they have valid attributes. The ac...

Ruj, Sushmita; Stojmenovic, Ivan

2011-01-01T23:59:59.000Z

96

Search Hanford accessible reports electronically system design description. Revision 1  

SciTech Connect

The Search Hanford Accessible Records Electronically (SHARE) system was produced by a combined team of personnel from Westinghouse Hanford Company (WHC) Corrective Action Data Systems (CADS) and Information Resource Management (IRM) Information and Scientific Systems (ISS) organizations. The ESQD Text Evaluation and exchange Tool (ETEXT) prototype was used as a basis for the requirements used to support this design/build effort. TOPIC was used to build the SHARE application. TOPIC is a text search and retrieval software product produced by the Verity Corporation. The TOPIC source code is not provided with the product, and the programs cannot be changed. TOPIC can be customized for special requirements. The software is fully documented. Help messages, menu and screen layouts, command edits and options, and internal system design are all described in the TOPIC documentation. This System Design Description (SDD) will not reiterate the TOPIC documentation and design. Instead, it will focus on the SHARE installation of TOPIC. This SDD is designed to assist the SHARE database/infobase administrator (DBA) in maintaining and supporting the application. It assumes that the assigned DBA is knowledgeable in using the TOPIC product, and is also knowledgeable in using a personal computer (PC), Disk Operating System (DOS) commands, and the document WHC-CM-3-10. SHARE is an Impact Level 4 system, and all activities related to SHARE must conform with the WHC-CM-3-10 procedures for an Impact Level 4 system. The Alternatives Analysis will be treated as a level 3-Q document, to allow for reference by potential future projects.

Gilomen, T.L.

1995-12-31T23:59:59.000Z

97

Substation Security and Remote Access Implementation Strategies  

Science Conference Proceedings (OSTI)

This project analyzed control system remote access solutions in a side-by-side comparison. Five systems were lab-tested against common functions used by utilities to access and manage electronic control systems. The five vendors’ products met the basic remote access requirements tested.BackgroundElectronic control systems that actuate protective equipment and physical operations in the ...

2012-12-20T23:59:59.000Z

98

Access Control for a Replica Management Database Justin M. Wozniak  

E-Print Network (OSTI)

commodity hardware may be cataloged into a unified, high- utilization system. Such widely distributed-59593-552-5/06/0010 ...$5.00. massively parallel computing infrastructure, capable of pro- cessing vast amounts of user data. A variety of options exist to parallelize and distribute stor- age over clusters or grids, but several

Thain, Douglas

99

Controlling Multiparticle System on a Line. I  

E-Print Network (OSTI)

We study a classical multiparticle system (such as Toda lattice) whose dynamics we intend to control by forces applied to few particles of the system. Various problem settings, typical for control theory are posed for this model; among those: studying accessibility and controllability properties, structure properties and feedback linearization of respective control system, time-optimal relocation of particles. We obtain complete or partial answers to the posed questions; criteria and methods of geometric control theory are employed. In the present part I we consider nonperiodic multiparticle system. In the forthcoming Part II we address controllability issue for multiparticle system subject to periodic boundary conditions. That study would require an extension and refinement of known methods of geometric control.

Andrey Sarychev

2008-09-13T23:59:59.000Z

100

The Epicure Control System  

SciTech Connect

The Epicure Control System supports the Fermilab fixed target physics program. The system is distributed across a network of many different types of components. The use of multiple layers on interfaces for communication between logical tasks fits the client-server model. Physical devices are read and controlled using symbolic references entered into a database with an editor utility. The database system consists of a central portion containing all device information and optimized portions distributed among many nodes. Updates to the database are available throughout the system within minutes after being requested.

Dambik, E.; Kline, D.; West, R.

1993-09-01T23:59:59.000Z

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

NUCLEAR REACTOR CONTROL SYSTEM  

DOE Patents (OSTI)

A control system is described for a nuclear reactor using enriched uranium fuel of the type of the swimming pool and other heterogeneous nuclear reactors. Circuits are included for automatically removing and inserting the control rods during the course of normal operation. Appropriate safety circuits close down the nuclear reactor in the event of emergency.

Epler, E.P.; Hanauer, S.H.; Oakes, L.C.

1959-11-01T23:59:59.000Z

102

Closing the Gap in Control System Implementations  

E-Print Network (OSTI)

Control Systems . . . . . . . . . . . . . . . . . .Continuous-Time Linear Control Systems . . . . .Discrete-Time Linear Control Systems . . . . . . . . . . .

Saha, Indranil

2013-01-01T23:59:59.000Z

103

Lighting Group: Controls: Systems Integration  

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

Systems Integration Building Control Systems Integration Objective This research project investigates how diverse building control systems can be integrated to provide seamless...

104

Neural daylight control system  

E-Print Network (OSTI)

The paper describes the design, the implementation of a neural controller used in an automatic daylight control system. The automatic lighting control system (ALCS) attempt to maintain constant the illuminance at the desired level on working plane even if the daylight contribution is variable. Therefore, the daylight will represent the perturbation signal for the ALCS. The mathematical model of process is unknown. The applied structure of control need the inverse model of process. For this purpose it was used other artificial neural network (ANN) which identify the inverse model of process in an on-line manner. In fact, this ANN identify the inverse model of process + the perturbation signal. In this way the learning signal for neural controller has a better accuracy for the present application.

Grif, Horatiu Stefan

2010-01-01T23:59:59.000Z

105

Strong Analytic Controllability for Hydrogen Control Systems  

E-Print Network (OSTI)

The realization and representation of so(4,2) associated with the hydrogen atom Hamiltonian are derived. By choosing operators from the realization of so(4,2) as interacting Hamiltonians, a hydrogen atom control system is constructed, and it is proved that this control system is strongly analytically controllable based on a time-dependent strong analytic controllability theorem.

Chunhua Lan; Tzyh-Jong Tarn; Quo-Shin Chi; John W. Clark

2004-09-22T23:59:59.000Z

106

SERVOMOTOR CONTROL SYSTEM  

DOE Patents (OSTI)

Control systems for automatic positioning of an electric motor operated vapor valve are described which is operable under the severe conditions existing in apparatus for electro-magnetlcally separating isotopes. In general, the system includes a rotor for turning the valve comprising two colls mounted mutually perpendicular to each other and also perpendicular to the magnetic field of the isotope separating apparatus. The coils are furnished with both a-c and d- c current by assoclate control circuitry and a position control is provided for varying the ratlo of the a-c currents in the coils and at the same time, but in an inverse manner, the ratio between the d-c currents in the coils is varied. With the present system the magnitude of the motor torque is constant for all valves of the rotor orientatlon angle.

MacNeille, S.M.

1958-12-01T23:59:59.000Z

107

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

108

Electric turbocompound control system  

DOE Patents (OSTI)

Turbocompound systems can be used to affect engine operation using the energy in exhaust gas that is driving the available turbocharger. A first electrical device acts as a generator in response to turbocharger rotation. A second electrical device acts as a motor to put mechanical power into the engine, typically at the crankshaft. Apparatus, systems, steps, and methods are described to control the generator and motor operations to control the amount of power being recovered. This can control engine operation closer to desirable parameters for given engine-related operating conditions compared to actual. The electrical devices can also operate in "reverse," going between motor and generator functions. This permits the electrical device associated with the crankshaft to drive the electrical device associated with the turbocharger as a motor, overcoming deficient engine operating conditions such as associated with turbocharger lag.

Algrain, Marcelo C. (Dunlap, IL)

2007-02-13T23:59:59.000Z

109

Controller synthesis for networked control systems  

Science Conference Proceedings (OSTI)

This paper presents a discrete-time model for networked control systems (NCSs) that incorporates all network phenomena: time-varying sampling intervals, packet dropouts and time-varying delays that may be both smaller and larger than the sampling interval. ... Keywords: Linear matrix inequalities, Networked control systems, Sampled-data control, Stability analysis, Time-varying delay

M. B. G. Cloosterman; L. Hetel; N. van de Wouw; W. P. M. H. Heemels; J. Daafouz; H. Nijmeijer

2010-10-01T23:59:59.000Z

110

Incoherent Control of Locally Controllable Quantum Systems  

E-Print Network (OSTI)

An incoherent control scheme for state control of locally controllable quantum systems is proposed. This scheme includes three steps: (1) amplitude amplification of the initial state by a suitable unitary transformation, (2) projective measurement on the amplified state, and (3) final optimization by a unitary controlled transformation. The first step increases the amplitudes of some desired eigenstates and the corresponding probability of observing these eigenstates, the second step projects, with high probability, the amplified state into a desired eigenstate, and the last step steers this eigenstate into the target state. Within this scheme, two control algorithms are presented for two classes of quantum systems. As an example, the incoherent control scheme is applied to the control of a hydrogen atom by an external field. The results support the suggestion that projective measurements can serve as an effective control and local controllability information can be used to design control laws for quantum systems. Thus, this scheme establishes a subtle connection between control design and controllability analysis of quantum systems and provides an effective engineering approach for controlling quantum systems with partial controllability information.

Daoyi Dong; Chenbin Zhang; Herschel Rabitz; Alexander Pechen; Tzyh-Jong Tarn

2008-10-21T23:59:59.000Z

111

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

112

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

113

Operational experience with the CEBAF control system  

SciTech Connect

The CEBAF accelerator at Thomas Jefferson National Accelerator Facility (Jefferson Lab) successfully began its experimental nuclear physics program in November of 1995 and has since surpassed predicted machine availability. Part of this success can be attributed to using the EPICS (Experimental Physics and Industrial Control System) control system toolkit. The CEBAF control system is one of the largest accelerator control system now operating. It controls approximately 338 SRF cavities, 2,300 magnets, 500 beam position monitors and other accelerator devices, such as gun hardware and other beam monitoring devices. All told, the system must be able to access over 125,000 database records. The system has been well received by both operators and the hardware designers. The EPICS utilities have made the task of troubleshooting systems easier. The graphical and test-based creation tools have allowed operators to custom build control screens. In addition, the ability to integrate EPICS with other software packages, such as Tcl/Tk, has allowed physicists to quickly prototype high-level application programs, and to provide GUI front ends for command line driven tools. Specific examples of the control system applications are presented in the areas of energy and orbit control, cavity tuning and accelerator tune up diagnostics.

Hovater, C.; Chowdhary, M.; Karn, J.; Tiefenback, M.; Zeijts, J. van; Watson, W.

1996-10-01T23:59:59.000Z

114

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

115

Optimal control for biological movement systems  

E-Print Network (OSTI)

of hierarchical control system (results obtained afterthe greatest discovery in control and systems theory of theloop Control System. . . . . . . . . . . . . . . . . . . 10

Li, Weiwei

2006-01-01T23:59:59.000Z

116

On Cyber Security for Networked Control Systems  

E-Print Network (OSTI)

on control systems . . . . . . . . . . . . . . . . 7.2control system. . . . . . . . . . . . . . . . . . . . . . . . . .8 Stabilization of Networked Control Systems using 8.1

Amin, Saurabh

2011-01-01T23:59:59.000Z

117

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 system should include accurate instrumentation, closed loop purity control, and a computer system to execute direct digital control with appropriate feed-forward algorithms.

Chatterjee, N.; Suchdeo, S. R.

1984-01-01T23:59:59.000Z

118

Radio access network power management considering radio over fiber technique for 4G mobile system  

Science Conference Proceedings (OSTI)

Radio over fiber technique was suggested as excelent candidates for 4G radio access network considering large number mobile users. With higher number of base stations, a microwave link presents more disadvantages across base stations in relation to power ... Keywords: 4G mobile system, fiber dispersion, power manaegment, radio access network, radio over fiber

Jalal J. Hamad Ameen; Widad Ismail; Sevia M. Idrus

2011-03-01T23:59:59.000Z

119

Exercise Control System Press Release  

Science Conference Proceedings (OSTI)

MEL Transfers its Web-Based Emergency Response Exercise Control System. During FY05-FY07 the MEL staff worked ...

2010-10-05T23:59:59.000Z

120

McIDAS III: A Modern Interactive Data Access and Analysis System  

Science Conference Proceedings (OSTI)

A powerful facility for meteorological analysis called the Man Computer Interactive Data Access System (McIDAS) was designed and implemented in the early 1970's at the Space Science and Engineering Center of the University of Wisconsin-Madison. ...

V. E. Suomi; R. Fox; S. S. Limaye; W. L. Smith

1983-05-01T23:59:59.000Z

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.


121

Improving WWW Access-from Single-Purpose Systems to Agent Architectures?  

Science Conference Proceedings (OSTI)

Sophisticated techniques from various areas of Artificial Intelligence can be used to improve the access to the WWW; the most promising ones stem from Data Mining and Knowledge Modeling. We describe the process of building two experimental systems: the ...

D. Sramek; Petr Berka; J. Kosek; V. Svatek

2000-09-01T23:59:59.000Z

122

Utility-Interconnected Photovoltaic Systems: Evaluating the Rationale for the Utility-Accessible External Disconnect Switch  

DOE Green Energy (OSTI)

The utility-accessible alternating current (AC) external disconnect switch (EDS) for distributed generators, including photovoltaic (PV) systems, is a hardware feature that allows a utility?s employees to manually disconnect a customer-owned generator from the electricity grid. This paper examines the utility-accessible EDS debate in the context of utility-interactive PV systems for residential and small commercial installations. It also evaluates the rationale for EDS requirements.

Coddington, M.; Margolis, R.M.; Aabakken, J.

2008-01-01T23:59:59.000Z

123

Improving the Usability and Accessibility of Voting Systems ...  

Science Conference Proceedings (OSTI)

... ble standards are at the system under test conforms. Usability testing is mainly reserved for general usability requirements that cannot ... nts ...

2010-03-19T23:59:59.000Z

124

Environment control system  

SciTech Connect

A system for controlling the environment of an enclosed area in nuclear reactor installations. The system permits the changing of the environment from nitrogen to air, or from air to nitrogen, without the release of any radioactivity or process gas to the outside atmosphere. In changing from a nitrogen to an air environment, oxygen is inserted into the enclosed area at the same rate which the nitrogen-oxygen gas mixture is removed from the enclosed area. The nitrogen-oxygen gas mixture removed from the enclosed area is mixed with hydrogen, the hydrogen recombining with the oxygen present in the gas to form water. The water is then removed from the system and, if it contains any radioactive products, can be utilized to form concrete, which can then be transferred to a licensed burial site. The process gas is purified further by stripping it of carbon dioxide and then distilling it to remove any xenon, krypton, and other fission or non-condensable gases. The pure nitrogen is stored as either a cryogenic liquid or a gas. In changing from an air to nitrogen environment, the gas is removed from the enclosed area, mixed with hydrogen to remove the oxygen present, dried, passed through adsorption beds to remove any fission gases, and reinserted into the enclosed area. Additionally, the nitrogen stored during the nitrogen to air change, is inserted into the enclosed area, the nitrogen from both sources being inserted into the enclosed area at the same rate as the removal of the gas from the containment area. As designed, the amount of nitrogen stored during the nitrogen to air change substantially equals that required to replace oxygen removed during an air to nitrogen change.

Sammarone, Dino G. (Edgewood Borough, PA)

1978-01-01T23:59:59.000Z

125

Access to the ALS  

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

Access to the ALS Access to the ALS Print User Access The ALS experiment floor (Building 6) is a Controlled Access Area for radiation protection. All ALS users are required to...

126

Access to the ALS  

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

Gate Access Access to the ALS Print User Access The ALS experiment floor (Building 6) is a Controlled Access Area for radiation protection. All ALS users are required to register...

127

Error control coding for the N-user mod-2 multiple-access channel  

Science Conference Proceedings (OSTI)

The efficient use of transmission facilities often requires the sharing of resources by a number of users. Commonly used methods of shared media access are time division multiple access (TDMA), frequency-division multiple access (FDMA), code-division ...

V. P. Telang; M. A. Herro

1998-07-01T23:59:59.000Z

128

Performance in Planning — Smart Systems for the Access Network  

Science Conference Proceedings (OSTI)

Improvements in system technologies continue apace — with new developments in software methods arguably outstripping even the breakneck progress in hardware power described by ‘Moore‘s Law‘. The software developments are timely, ...

D. E. Asumu; J. Mellis

1998-10-01T23:59:59.000Z

129

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

130

Search Hanford accessible reports electronically system requirements specification  

SciTech Connect

The Emergency, Safety, & Quality (ESQ) Services organization of Westinghouse Hanford Company (WHC) is experiencing changes related to new programs. The programs include Corrective Actions Management Systems, Self-Assessment, Trend Analysis, and Lessons Learned analysis. The programs are pushing up organizational costs while funding and manpower levels are projected to be dropping. A large cost involved in implementing the new programs is the cost for people to locate unstructured information required to make decisions or write documentation. But, most resources for retrieving information are found in structured database systems. This means that unstructured information that must be located has to be found by one of these methods: (1) searching manually through documents, (2) searching individual documents one at a time with word processing programs, (3) searching through text fields with query systems primarily designed for structured database information, or (4) develop a text search and retrieval system designed for unstructured information. One example of this is using Occurrence Reporting Processing System (ORPS) and Quality, Environmental, and Safety Tracking (QUEST) documents. An explanation of this is in the following textual box.

Willers, K.J.

1994-02-28T23:59:59.000Z

131

The averaged control system of fast oscillating control systems  

E-Print Network (OSTI)

For control systems that either have an explicit periodic dependence on time or have periodic solutions and small controls, we define an average control system that takes into account all possible variations of the control, and prove that its solutions approximate all solutions of the oscillating systems as oscillations go faster. The dimension of its velocity set is characterised geomtrically. When it is maximum the average system defines a Finsler metric, unfortunately not twice differntiable in general. Under particular assumptions, valid for the control two body system, this Finsler metric generates a Hamiltonian flow on the cotangent bundle. For minimum time control, this average system proves that averaging the Hamiltonian given by the maximum principle is a valid approximation.

Bombrun, Alex

2011-01-01T23:59:59.000Z

132

Building Integrated Remote Control Systems for Electronics Boards  

E-Print Network (OSTI)

This paper addresses several aspects of implementing a remote control system for a large number of electronics boards in order to perform remote Field Programmable Gate Array (FPGA) programming, hardware configuration, data register access, and monitoring, as well as interfacing it to an expert system. The paper presents a common strategy for the representation of the boards in the abstraction layer of the control system, and generic communication protocols for the access to the board resources. In addition, an implementation is proposed in which the mapping between the functional parameters and the physical registers of the different boards is represented by descriptors in the board representation such that the translation can be handled automatically by a generic translation manager. Using the Distributed Information Management (DIM) package for the control communication with the boards, and the industry SCADA system PVSS II from ETM, a complete control system has been built for the Timing and Fast Control ...

Jacobsson, R

2008-01-01T23:59:59.000Z

133

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 ............................................................................................................

134

A Distributed Metadata Management, Data Discovery and Access System  

E-Print Network (OSTI)

Mercury is a federated metadata harvesting, search and retrieval tool based on both open source and software developed at Oak Ridge National Laboratory. It was originally developed for NASA, and the Mercury development consortium now includes funding from NASA, USGS, and DOE. A major new version of Mercury was developed during 2007. This new version provides orders of magnitude improvements in search speed, support for additional metadata formats, integration with Google Maps for spatial queries, support for RSS delivery of search results, among other features. Mercury provides a single portal to information contained in disparate data management systems. It collects metadata and key data from contributing project servers distributed around the world and builds a centralized index. The Mercury search interfaces then allow the users to perform simple, fielded, spatial and temporal searches across these metadata sources. This centralized repository of metadata with distributed data sources provides extremely fa...

Palanisamy, Giriprakash; Green, Jim; Wilson, Bruce

2010-01-01T23:59:59.000Z

135

Adaptive access control in coordination-based mobile agent systems  

Science Conference Proceedings (OSTI)

The increased pervasiveness of mobile devices like cell phones, PDAs, and laptops draws attention to the need for coordination among these networked devices. The very nature of the environment requires devices to interact opportunistically when resources ...

Christine Julien; Jamie Payton; Gruia-Catalin Roman

2005-01-01T23:59:59.000Z

136

ARCS – Access Rate Control System - Energy Innovation Portal  

All internal components are furnished in a weather-protected steel housing. ... Solar Photovoltaic; Solar Thermal; Startup America; Vehicles and ...

137

Personalized HVAC control system  

E-Print Network (OSTI)

We present a novel method of building comfort control, focused around the occupant. Custom sensing, communication, and actuation hardware were developed to locate users in a building, and measure various parameters directly ...

Feldmeier, Mark Christopher

138

Building Integrated Remote Control Systems for Electronic Boards  

E-Print Network (OSTI)

This paper addresses several aspects of implementing a remote control system for a large number of electronics boards in order to perform remote Field Programmable Gate Array (FPGA) programming, hardware configuration, data register access, and monitoring, as well as interfacing it to a configuration database and an expert system. The paper presents a common strategy for the representation of the boards in the abstraction layer of the control system, and generic communication protocols for the access to the board resources. In addition, an implementation is proposed in which the mapping between the functional parameters and the physical registers of the different boards is represented by descriptors in the board representation such that the translation can be handled automatically by a generic translation manager. Using the Distributed Information Management (DIM) package for the control communication with the boards, and the industry SCADA system PVSS II from ETM, a complete control system has been built for...

Jacobsson, Richard

2007-01-01T23:59:59.000Z

139

Nonlinear Control of Delay and PDE Systems  

E-Print Network (OSTI)

Conference on Control and Systems, 1997. [151] O. Roesch, H.Adaptive Control for Systems with Uncertain Plant Pa-Stability of networked control systems with uncertain time-

Bekiaris-Liberis, Nikolaos

140

An approach to improve the accessibility and usability of existing web system  

Science Conference Proceedings (OSTI)

The Web is currently the main way of providing computing services, reaching a larger number of users with different characteristics. As the complexity and interactivity of systems is increased, users become more demanding towards all the requirements ... Keywords: user requirements, web systems, web usability and accessibility

Ana Luiza Dias, Renata Pontin de Mattos Fortes, Paulo Cesar Masiero, Willian Massami Watanabe, Matheus Edson Ramos

2013-09-01T23:59:59.000Z

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.


141

The APS control system network  

SciTech Connect

The APS accelerator control system is a distributed system consisting of operator interfaces, a network, and computer-controlled interfaces to hardware. This implementation of a control system has come to be called the {open_quotes}Standard Model.{close_quotes} The operator interface is a UNDC-based workstation with an X-windows graphical user interface. The workstation may be located at any point on the facility network and maintain full functionality. The function of the network is to provide a generalized communication path between the host computers, operator workstations, input/output crates, and other hardware that comprise the control system. The crate or input/output controller (IOC) provides direct control and input/output interfaces for each accelerator subsystem. The network is an integral part of all modem control systems and network performance will determine many characteristics of a control system. This paper will describe the overall APS network and examine the APS control system network in detail. Metrics are provided on the performance of the system under various conditions.

Sidorowicz, K.V.; McDowell, W.P.

1995-12-31T23:59:59.000Z

142

Controlled System Separation  

Science Conference Proceedings (OSTI)

Power systems are increasingly stressed by the rapid growth of electricity markets and renewable sources. As a result, the risks of a disturbance causing out-of-step generators or triggering cascading failures in a power system are also increasing. In extreme situations, successive line trips may break the power network into two or more islands in an undesired manner. For those areas without or lacking of generation capacities to support local electricity demands, much load has to be dropped, thus result...

2008-11-21T23:59:59.000Z

143

Incoherent control and entanglement for two-dimensional coupled systems  

E-Print Network (OSTI)

We investigate accessibility and controllability of a quantum system S coupled to a quantum probe P, both described by two-dimensional Hilbert spaces, under the hypothesis that the external control affects only P. In this context accessibility and controllability properties describe to what extent it is possible to drive the state of the system S by acting on P and using the interaction between the two systems. We give necessary and sufficient conditions for these properties and we discuss the relation with the entangling capability of the interaction between S and P. In particular, we show that controllability can be expressed in terms of the SWAP operator, acting on the composite system, and its square root.

R. Romano; D. D'Alessandro

2005-10-03T23:59:59.000Z

144

Control Systems Security Publications Library | Department of...  

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

Electricity Advisory Committee Technology Development Transmission Planning Smart Grid Energy Delivery Systems Cybersecurity Control Systems Security News Archive Control...

145

Power System Control Practices and Outlook for New or Revised Control Concepts  

Science Conference Proceedings (OSTI)

This research reviews the capability of current power system control practices in North America to address open access to the transmission system. In a deregulated, competitive environment, with non-traditional suppliers entering energy markets, redefined rules are needed to ensure continued reliable and stable operation of the interconnected grids and to reasonably allocate the control burden among both regulated and non-regulated suppliers.

1994-09-02T23:59:59.000Z

146

Analyzing the effect of routing protocols on media access control protocols in radio networks  

SciTech Connect

We study the effect of routing protocols on the performance of media access control (MAC) protocols in wireless radio networks. Three well known MAC protocols: 802.11, CSMA, and MACA are considered. Similarly three recently proposed routing protocols: AODV, DSR and LAR scheme 1 are considered. The experimental analysis was carried out using GloMoSim: a tool for simulating wireless networks. The main focus of our experiments was to study how the routing protocols affect the performance of the MAC protocols when the underlying network and traffic parameters are varied. The performance of the protocols was measured w.r.t. five important parameters: (i) number of received packets, (ii) average latency of each packet, (iii) throughput (iv) long term fairness and (v) number of control packets at the MAC layer level. Our results show that combinations of routing and MAC protocols yield varying performance under varying network topology and traffic situations. The result has an important implication; no combination of routing protocol and MAC protocol is the best over all situations. Also, the performance analysis of protocols at a given level in the protocol stack needs to be studied not locally in isolation but as a part of the complete protocol stack. A novel aspect of our work is the use of statistical technique, ANOVA (Analysis of Variance) to characterize the effect of routing protocols on MAC protocols. This technique is of independent interest and can be utilized in several other simulation and empirical studies.

Barrett, C. L. (Christopher L.); Drozda, M. (Martin); Marathe, A. (Achla); Marathe, M. V. (Madhav V.)

2002-01-01T23:59:59.000Z

147

System Compatibility of Modern Lighting Control Systems  

Science Conference Proceedings (OSTI)

The state of the energy industry combined with growing economic pressures will drive accelerated use of energy-efficient dimmable lighting devices and control systems. While penetration and application will be different across customer sectors, the goal is to dynamically reduce lighting load without compromising productivity and the quality of light and life in a timely manner. Continual improvement of dimmable devices and controls is paramount to achieving that goal. EPRI research concepts in system com...

2011-10-11T23:59:59.000Z

148

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

Science Conference Proceedings (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

149

The Man computer Interactive Data Access System: 25 Years of Interactive Processing  

Science Conference Proceedings (OSTI)

On 12 October 1998, it was the 25th anniversary of the Man computer Interactive Data Access System (McIDAS). On that date in 1973, McIDAS was first used operationally by scientists as a tool for data analysis. Over the last 25 years, McIDAS has ...

Matthew A. Lazzara; John M. Benson; Robert J. Fox; Denise J. Laitsch; Joseph P. Rueden; David A. Santek; Delores M. Wade; Thomas M. Whittaker; J. T. Young

1999-02-01T23:59:59.000Z

150

Modeling and implementing an agent-based system for prediction of protein relative solvent accessibility  

Science Conference Proceedings (OSTI)

In this paper, an agent-based system for prediction of relative solvent accessibility (RSA) of proteins is proposed. Since, it is believed that the 3D-structure of most proteins is defined by their sequences, utilizing data mining methods to extract ... Keywords: Data mining, Feature selection methods, Intelligent agents, Physicochemical properties of amino acids

Alireza Meshkin; Nasser Ghasem Aghaee; Mehdi Sadeghi

2011-05-01T23:59:59.000Z

151

A KNOWLEDGE BASED SYSTEM FOR PROVIDING INTELLIGENT ACCESS TO A PETROLEUM USER DATABASE  

E-Print Network (OSTI)

INTELLIGENT ACCESS TO A PETROLEUM USER DATABASE StevenINTELLIGENT ACCESS TO A PETROLEUM USER DATABASE StevenINTELLIGENT ACCESS TO A PETROLEUM USER DATABASE Steven

Rosenberg, Steven

2011-01-01T23:59:59.000Z

152

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

153

REACTOR SYSTEM AND CONTROL VALVE  

DOE Patents (OSTI)

Valves have been developed for controlling the flow of gaseous fluid through a passage or conduit. The valves have particular application in the cooling systems of gas; cooled reactors. (R.J.S.)

Fortescue, P.; Rickard, C.; Rose, D.

1963-01-01T23:59:59.000Z

154

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

155

PIA - Weapons Data Control Systems | Department of Energy  

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

Weapons Data Control Systems PIA - Weapons Data Control Systems PIA - Weapons Data Control Systems PIA PIA - Weapons Data Control Systems...

156

Intrinsically resilient energy control systems  

Science Conference Proceedings (OSTI)

To preserve critical energy control functions while under attack, it is necessary to perform comprehensive analysis on the root cause and impact of an ongoing cyber intrusion without sacrificing the availability of energy delivery. In this position paper, ... Keywords: cybersecurity, data integration, energy control system, intrusion-tolerant scada, knowledge base, ontology, root cause analysis, semantic annotation, situational awareness

Frederick Sheldon; Daniel Fetzer; David Manz; Jingshan Huang; Stuart Goose; Thomas Morris; Jiangbo Dang; Jonathan Kirsch; Dong Wei

2013-01-01T23:59:59.000Z

157

Feedback control of spin systems  

E-Print Network (OSTI)

The feedback stabilization problem for ensembles of coupled spin 1/2 systems is discussed from a control theoretic perspective. The noninvasive nature of the bulk measurement allows for a fully unitary and deterministic closed loop. The Lyapunov-based feedback design presented does not require spins that are selectively addressable. With this method, it is possible to obtain control inputs also for difficult tasks, like suppressing undesired couplings in identical spin systems.

Claudio Altafini

2006-01-03T23:59:59.000Z

158

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

159

Access to the ALS  

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

Access to the ALS Print User Access The ALS experiment floor (Building 6) is a Controlled Access Area for radiation protection. All ALS users are required to register with the ALS...

160

CONTROL SYSTEM FOR NEUTRONIC REACTORS  

DOE Patents (OSTI)

BS>A slow-acting shim rod for control of major variations in reactor neutron flux and a fast-acting control rod to correct minor flux variations are employed to provide a sensitive, accurate control system. The fast-acting rod is responsive to an error signal which is produced by changes in the neutron flux from a predetermined optimum level. When the fast rod is thus actuated in a given direction, means is provided to actuate the slow-moving rod in that direction to return the fast rod to a position near the midpoint of its control range. (AEC)

Crever, F.E.

1962-05-01T23:59:59.000Z

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

Medium Access Control Protocols for Wireless Sensor Networks with Energy Harvesting  

E-Print Network (OSTI)

The design of Medium Access Control (MAC) protocols for wireless sensor networks (WSNs) has been conventionally tackled by assuming battery-powered devices and by adopting the network lifetime as the main performance criterion. While WSNs operated by energy-harvesting (EH) devices are not limited by network lifetime, they pose new design challenges due to the uncertain amount of harvestable energy. Novel design criteria are thus required to capture the trade-offs between the potentially infinite network lifetime and the uncertain energy availability. This paper addresses the analysis and design of WSNs with EH devices by focusing on conventional MAC protocols, namely TDMA, Framed-ALOHA (FA) and Dynamic-FA (DFA), and by accounting for the performance trade-offs and design issues arising due to EH. A novel metric, referred to as delivery probability, is introduced to measure the capability of a MAC protocol to deliver the measure of any sensor in the network to the intended destination (or fusion center, FC). T...

Iannello, Fabio; Spagnolini, Umberto

2011-01-01T23:59:59.000Z

162

Control System of the Bepcii  

E-Print Network (OSTI)

Recently the Chinese Academy of Sciences has chosen BEPCII as the future development of the BEPC, i.e. upgrade of both the machine and detector. The luminosity of the machine is expected to increase to 1.0x1033cm-2s-1. The project will be started at the beginning of 2002 and finished with in 3-4 years. The BEPC control system was built in 1987 and upgraded in 1994. According to the design of the BEPCII, a double ring schema will be adopted and a number of new devices will be added in the system. The existing control system has to be upgraded. The BEPCII will be distributed architecture and developed by EPICS. We are going to apply the standard hardware interfaces and mature technologies in the system. A number of VME IOCs will be added in the system and the feildbus, PLCs will be used as device control for some kind of equipment. We will keep the existing system in use, such as CAMAC modules and PC front-ends, and merge it into EPICS system. Recently the development of the prototype is in progress. This paper will describe the system design and development issues.

J. Zhao; C. H. Wang; X. C. Kong; G. Lei; S. F. Xu; Q. Le

2001-11-21T23:59:59.000Z

163

Reactor control rod timing system  

DOE Patents (OSTI)

A fluid driven jet-edge whistle timing system for control rods of a nuclear reactor for producing real-time detection of the timing of each control rod in its scram operation. An important parameter in reactor safety, particularly for liquid metal fast breeder reactors (LMFBR), is the time deviation between the time the control rod is released and the time the rod actually reaches the down position. The whistle has a nearly pure tone signal with center frequency (above 100 kHz) far above the frequency band in which the energy of the background noise is concentrated. Each control rod can be fitted with a whistle with a different frequency so that there is no ambiguity in differentiating the signal from each control rod.

Wu, Peter T. K. (Clifton Park, NY)

1982-01-01T23:59:59.000Z

164

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

165

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

166

Proton beam therapy control system  

SciTech Connect

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

167

Proton beam therapy control system  

SciTech Connect

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

2013-12-03T23:59:59.000Z

168

Detector Control System of the ATLAS Insertable B-Layer  

E-Print Network (OSTI)

To improve tracking robustness and precision of the ATLAS inner tracker, an additional, fourth pixel layer is foreseen, called Insertable B-Layer (IBL). It will be installed between the innermost present Pixel layer and a new, smaller beam pipe and is presently under construction. As, once installed into the experiment, no access is possible, a highly reliable control system is required. It has to supply the detector with all entities required for operation and protect it at all times. Design constraints are the high power density inside the detector volume, the sensitivity of the sensors against heat-ups, and the protection of the front end electronics against transients. We present the architecture of the control system with an emphasis on the CO2 cooling system, the power supply system, and protection strategies. As we aim for a common operation of Pixel and IBL detector, the integration of the IBL control system into the Pixel control system will also be discussed.

Kersten, S; Lantzsch, K; Zeitnitz, C; Verlaat, B; Meroni, C; Citterio, M; Gensolen, F; Mättig, P; Kind, P

2011-01-01T23:59:59.000Z

169

AFECS. Multi-Agent Framework for Experiment Control Systems  

Science Conference Proceedings (OSTI)

AFECS is a pure Java based software framework for designing and implementing distributed control systems. AFECS creates a control system environment as a collection of software agents behaving as finite state machines. These agents can represent real entities, such as hardware devices, software tasks, or control subsystems. A special control oriented ontology language (COOL), based on RDFS (Resource Definition Framework Schema) is provided for control system description as well as for agent communication. AFECS agents can be distributed over a variety of platforms. Agents communicate with their associated physical components using range of communication protocols, including tcl-DP, cMsg (publish-subscribe communication system developed at Jefferson Lab), SNMP (simple network management protocol), EPICS channel access protocol and JDBC.

Vardan Gyurjyan; David Abbott; William Heyes; Edward Jastrzembski; Carl Timmer; Elliott Wolin

2008-01-23T23:59:59.000Z

170

Vulnerability Analysis of Energy Delivery Control Systems  

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

The Vulnerability Analysis of Energy Delivery Control Systems report, prepared by Idaho National Laboratory, describes the common vulnerabilities on energy sector control systems, and provides...

171

Cyber Incidents Involving Control Systems  

Science Conference Proceedings (OSTI)

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

172

Computer controlled air conditioning systems  

SciTech Connect

This patent describes an improvement in a computer controlled air conditioning system providing for circulation of air through an air conditioned house in contact with concrete walls requiring a humidity within a critical range. The improvement consists of: a computer for processing sensed environmental input data including humidity and oxygen to produce output control signals for affecting the humidity of the air in the house; provision for an air flow circulation path through the house in contact with the concrete walls; sensing responsive to the amount of oxygen in the house for providing input signals to the computer; mixing for combining with the air in the house a variable amount of fresh atmospheric air to supply fresh oxygen; and humidity modifying means for modifying the humidity of the air flowing in the flow path responsive to the control signals.

Dumbeck, R.F.

1986-02-04T23:59:59.000Z

173

Heat engine generator control system  

SciTech Connect

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

174

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

175

Autonomous grain combine control system  

DOE Patents (OSTI)

A system for controlling a grain combine having a rotor/cylinder, a sieve, a fan, a concave, a feeder, a header, an engine, and a control system. The feeder of the grain combine is engaged and the header is lowered. A separator loss target, engine load target, and a sieve loss target are selected. Grain is harvested with the lowered header passing the grain through the engaged feeder. Separator loss, sieve loss, engine load and ground speed of the grain combine are continuously monitored during the harvesting. If the monitored separator loss exceeds the selected separator loss target, the speed of the rotor/cylinder, the concave setting, the engine load target, or a combination thereof is adjusted. If the monitored sieve loss exceeds the selected sieve loss target, the speed of the fan, the size of the sieve openings, or the engine load target is adjusted.

Hoskinson, Reed L.; Kenney, Kevin L.; Lucas, James R.; Prickel, Marvin A.

2013-06-25T23:59:59.000Z

176

Control circuit for combustion systems  

SciTech Connect

A control circuit is described for gas fired burners and the like such as are employed in commercial laundry fabric ironers requiring the energization of a blower motor and the resulting opening of a gas valve and ignition of a gas burner only after an air pressure sensitive switch is actuated through the operation of the blower motor for purging the system of combustible gases.

Kamberg, E.

1981-11-10T23:59:59.000Z

177

Multiple sensors with single HVAC system control  

E-Print Network (OSTI)

sensor; HVAC; control system; optimization; multi channeloptimization method is designed to be independent of the HVAC

Lin, Craig; Federspiel, Clifford; Auslander, David

2002-01-01T23:59:59.000Z

178

Direction control of bilinear systems. I  

E-Print Network (OSTI)

We consider the general bilinear control systems in three-dimensional Euclidean space which satisfy the LARC and have an open control set U; and give sufficient controllability conditions for corresponding projected systems on two-dimensional sphere.

Choque, Abdon

2010-01-01T23:59:59.000Z

179

Control system for cogenerative power plants  

Science Conference Proceedings (OSTI)

The paper presents a distributed control system for the realization of cogenerative supply of electricity and heat and, in given case, for their combination with waste heat recovery, particularly in combined (gas-steam) cycle industrial power plants. ... Keywords: cogenerative gas power plant, control of distributed parameter systems, distribution management system, electric power systems, optimization, process control, real time systems, simulation

Florin Hartescu

2008-08-01T23:59:59.000Z

180

Engine idle speed control system  

SciTech Connect

An idle speed control system is described for an internal combustion engine having a fuel delivery means for supplying fuel to the engine, the idle speed control system comprising in combination: means for controlling the fuel delivery means to supply a scheduled idle fuel quantity during a idle operating state of the engine; means for sensing the engine idle speed; integrator means responsive to the engine idle speed and a desired engine idle speed for adjusting the scheduled idle fuel quantity in direction and amount to cause correspondence between the engine idle speed and the desired engine idle speed, the integrator means adjustment being a measure of engine load conditions; and means for establishing the scheduled idle fuel quantity, the means including (A) means for establishing a family of curves as a function of the amount of integrator adjustment of the scheduled idle fuel quantity, each curve of the family of curves representing idle fuel quantity as a function of engine idle speed for a respective engine load condition, and (B) means for selecting the curve corresponding to the integrator adjustment of the scheduled idle fuel quantity and providing the scheduled fuel quantity from the selected curve in accord with the sensed engine idle speed.

Ament, F.

1986-07-01T23:59:59.000Z

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.


181

Instrumentation, Control, and Intelligent Systems  

DOE Green Energy (OSTI)

Abundant and affordable energy is required for U.S. economic stability and national security. Advanced nuclear power plants offer the best near-term potential to generate abundant, affordable, and sustainable electricity and hydrogen without appreciable generation of greenhouse gases. To that end, Idaho National Laboratory (INL) has been charged with leading the revitalization of nuclear power in the U.S. The INL vision is to become the preeminent nuclear energy laboratory with synergistic, world-class, multi-program capabilities and partnerships by 2015. The vision focuses on four essential destinations: (1) Be the preeminent internationally-recognized nuclear energy research, development, and demonstration laboratory; (2) Be a major center for national security technology development and demonstration; (3) Be a multi-program national laboratory with world-class capabilities; (4) Foster academic, industry, government, and international collaborations to produce the needed investment, programs, and expertise. Crucial to that effort is the inclusion of research in advanced instrumentation, control, and intelligent systems (ICIS) for use in current and advanced power and energy security systems to enable increased performance, reliability, security, and safety. For nuclear energy plants, ICIS will extend the lifetime of power plant systems, increase performance and power output, and ensure reliable operation within the system's safety margin; for national security applications, ICIS will enable increased protection of our nation's critical infrastructure. In general, ICIS will cost-effectively increase performance for all energy security systems.

Not Available

2005-09-01T23:59:59.000Z

182

A multivariable predictive fuzzy PID control system  

Science Conference Proceedings (OSTI)

In this paper, a novel multivariable predictive fuzzy-proportional-integral-derivative (F-PID) control system is developed by incorporating the fuzzy and PID control approaches into the predictive control framework. The developed control system has two ... Keywords: BPTT, Control, Fuzzy, LM, Multivariable, PID, Predictive

Aydogan Savran

2013-05-01T23:59:59.000Z

183

Distributionally robust control of constrained stochastic systems  

E-Print Network (OSTI)

May 1, 2013 ... Distributionally robust control of constrained stochastic systems. Bart P.G. Van Parys (bartvan ***at*** control.ee.ethz.ch) Daniel Kuhn (d.kuhn ...

184

Sliding mode control of quantum systems  

E-Print Network (OSTI)

This paper proposes a new robust control method for quantum systems with uncertainties involving sliding mode control (SMC). Sliding mode control is a widely used approach in classical control theory and industrial applications. We show that SMC is also a useful method for robust control of quantum systems. In this paper, we define two specific classes of sliding modes (i.e., eigenstates and state subspaces) and propose two novel methods combining unitary control and periodic projective measurements for the design of quantum sliding mode control systems. Two examples including a two-level system and a three-level system are presented to demonstrate the proposed SMC method. One of main features of the proposed method is that the designed control laws can guarantee desired control performance in the presence of uncertainties in the system Hamiltonian. This sliding mode control approach provides a useful control theoretic tool for robust quantum information processing with uncertainties.

Daoyi Dong; Ian R. Petersen

2009-10-31T23:59:59.000Z

185

Control rod drive hydraulic system  

DOE Patents (OSTI)

A hydraulic system for a control rod drive (CRD) includes a variable output-pressure CR pump operable in a charging mode for providing pressurized fluid at a charging pressure, and in a normal mode for providing the pressurized fluid at a purge pressure, less than the charging pressure. Charging and purge lines are disposed in parallel flow between the CRD pump and the CRD. A hydraulic control unit is disposed in flow communication in the charging line and includes a scram accumulator. An isolation valve is provided in the charging line between the CRD pump and the scram accumulator. A controller is operatively connected to the CRD pump and the isolation valve and is effective for opening the isolation valve and operating the CRD pump in a charging mode for charging the scram accumulator, and closing the isolation valve and operating the CRD pump in a normal mode for providing to the CRD through the purge line the pressurized fluid at a purge pressure lower than the charging pressure.

Ose, Richard A. (San Jose, CA)

1992-01-01T23:59:59.000Z

186

The quantum systems control and the optimal control theory  

E-Print Network (OSTI)

Mathematical theory of the quantum systems control is based on some ideas of the optimal control theory. These ideas are developed here as applied to these systems. The results obtained meet the deficiencies in the basis and algorithms of the control synthesis and expand the application of these methods.

V. F. Krotov

2008-04-21T23:59:59.000Z

187

The development of broadband satellite interactive access system based on DVB-S2 and mobile DVB-RCS standard  

Science Conference Proceedings (OSTI)

In this paper, the MoBISAT (Mobile Broadband Interactive Satellite Access Technology) system, the BcSAT (Broadband adaptive satellite communicationS and broadcAsting convergence Technology) system and the STC (Satellite and Terrestrial Convergence) system ... Keywords: BcSAT, DVB-S2, MoBISAT, STC, broadband mobile service, mobile DVB-RCS

Pansoo Kim; Dae-Ig Chang; Ho-Jin Lee

2007-01-01T23:59:59.000Z

188

‘R-What?’ Development of a role-based access control policy-writing tool for e-Scientists: Research Articles  

Science Conference Proceedings (OSTI)

A lightweight role-based access control policy authoring tool was developed for e-Scientists, a community for which access policies have to be implemented for an increasingly heterogeneous group of local and remote users. Two fundamental problems were ... Keywords: RBAC user interface, policy generation, usability

Sacha Brostoff; M. Angela Sasse; David Chadwick; James Cunningham; Uche Mbanaso; Sassa Otenko

2005-07-01T23:59:59.000Z

189

Adaptive control of Unmanned Aerial Systems  

E-Print Network (OSTI)

Adaptive control is considered to be one of the key enabling technologies for future high-performance, safety-critical systems such as air-breathing hypersonic vehicles. Adaptive flight control systems offer improved ...

Dydek, Zachary Thompson

2010-01-01T23:59:59.000Z

190

SRE-EDISON PLANT CONTROL SYSTEM  

SciTech Connect

The design of the control system for the steam plant to be used with the SRE is given. Operation of the system is discussed. (C.J.G.)

Hall, R.J.; Bilbao, E.D.; Young, E.

1959-04-14T23:59:59.000Z

191

Direct Digital Control- A Tool for Energy Management of HVAC Systems  

E-Print Network (OSTI)

Direct digital control (DDC) applied to heating, ventilating, and air-conditioning (HVAC) systems corrects many of the deficiencies of conventional automatic temperature control systems. By applying new control sequences, DDC optimizes HVAC energy use. DDC can reduce HVAC operation and maintenance time and provide the environmental conditions needed to maximize production. DDC technology uses standalone, microprocessor based controllers. Controllers directly sense and process control variables (e.g. temperature, pressure) and provide a control signal to an actuator. Personal computers provide remote or local access to the digital controllers and give HVAC mechanics, energy managers, and facility engineers capabilities that conventional control systems do not offer. This paper discusses the most common deficiencies of conventionally controlled HVAC systems, advantages of DOC systems, and a case study retrofit from pneumatic control to digital control.

Swanson, K.

1993-03-01T23:59:59.000Z

192

Mechanical Systems & Controls Group Staff Directory  

Science Conference Proceedings (OSTI)

Mechanical Systems and Controls Group Staff. Staff Listing. Steven T. Bushby, Leader, Supervisory Electronics Engineer, 301-975-5873. ...

2013-08-26T23:59:59.000Z

193

Control system for Kaplan hydro-turbine  

Science Conference Proceedings (OSTI)

In hydro power plants from Romania, there is a major interest for the implementation of digital systems for monitoring and control to replace the conventional control systems for power, frequency and voltage. Therefore is necessary to develop mathematical ... Keywords: Kaplan turbine, control system, turbine model

Matei Vinatoru; Eugen Iancu; Camelia Maican; Gabriela Canureci

2008-10-01T23:59:59.000Z

194

Fiber optic networks: fairness, access controls and prototyping Nathan Allan VanderHorn  

E-Print Network (OSTI)

Description . . . . . . . . . . . . . . . . . 115 5.3.3 FPGA System Design . . . . . . . . . . . . . . . . . . . . . . . . . . . . 116 5.3.4 Optical System Components . . . . . . . . . . . . . . . . . . . . . . . . 122 5.3.5 Testbed.1 Example Utilization Rates . . . . . . . . . . . . . . . . . . . . . . . . . 88 5.1 Measured receive power

195

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

196

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

197

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

198

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

199

DIII-D cryogenics control system status  

SciTech Connect

The DIII-D cryogenics system provides liquid helium for various auxiliary systems at the DIII-D tokamak facility. The system described here executes control and supervision of the cryogenics plant and associated load systems which include four neutral beam injectors, superconducting magnets, and an in-vessel tokamak cryocondensation pump. The recent addition of this divertor cryopump represented a major increase in the scope of the control system and greater need for reliable and automatic operation. The pump must be precooled, cooled and regenerated in a relatively short period of time under automatic control. Since the pump is located in the tokamak primary vacuum, coordination with the machine vacuum control system and consideration for the requirements of physics operations and vessel wall conditioning are required. A programmable logic controller is the central element in the cryogenics control system and exercises direct or supervisory control over the liquefier, gas management and loads. In the time since the control system was built during 1989, additions and improvements have been made to simplify operation and support upgrades. Cryogenics system capacity has been upgraded by the purchase of a new 150 {ell}/hr helium liquefier, a second 400 hp helium compressor and additional gas storage. The new liquefier incorporates a controller of its own which exchanges information with the cryogenics control system. This independent controller relieved the main system of liquefier process control tasks but necessitates much finer control of the system high and low pressures. The control system upgrades and automation are discussed with emphasis on the divertor cryocondensation pump control.

Campbell, G.L.; Harris, J.J.; Schaubel, K.M.

1993-09-01T23:59:59.000Z

200

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

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

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

202

Control Systems Security News Archive | Department of Energy  

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

Delivery Systems Cybersecurity Control Systems Security News Archive Control Systems Security News Archive Control Systems Security News Archive September 2010 - Secretary Chu...

203

A multiprogramming system for process control  

Science Conference Proceedings (OSTI)

This paper describes an operational small computer multiprogramming system developed for the control of the Stanford Two Mile Linear Accelerator (SLAC). The system has many features of larger systems such as dynamic memory allocation and interprocess ...

Sam Howry

1972-06-01T23:59:59.000Z

204

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

205

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

206

REACTOR CONTROL ROD OPERATING SYSTEM  

DOE Patents (OSTI)

A nuclear reactor control rod mechanism is designed which mechanically moves the control rods into and out of the core under normal conditions but rapidly forces the control rods into the core by catapultic action in the event of an emergency. (AEC)

Miller, G.

1961-12-12T23:59:59.000Z

207

System Compatibility of Modern Lighting Control Systems  

Science Conference Proceedings (OSTI)

Development of lighting control technologies continues at rapid rates in efforts to reduce energy usage and improve quality of light and color. Utilities, efficiency engineers, and end users should be aware of emissions and immunity performance of a lighting device before it is accepted for use in incentive and rebate programs prior to deployment in customer facilities. Continuing its efforts in evaluating new lighting control technologies, EPRI, within its Program 170, has tested four lighting control p...

2010-12-23T23:59:59.000Z

208

System Compatibility of Modern Lighting Control Systems  

Science Conference Proceedings (OSTI)

Energy-saving lighting control technologies are valuable tools for reducing the amount of electricity required to deliver sufficient light levels to consumers. Many new lighting controls have been developed in recent years which provide users with a wide variety of features past ON and OFF switching. Such features include but are not limited to: scheduled dimming, lumen sensing, wireless control, demand response, color temperature adjustment, and bi-level dimming.  These features provide ...

2012-12-31T23:59:59.000Z

209

Indirect control of quantum system via accessor: pure coherent control without system excitation  

E-Print Network (OSTI)

A pure indirect control of quantum systems via quantum accessor is investigated. In this control scheme, we do not apply any external classical excitation fields on the controlled system and we control a quantum system via a quantum accessor and classical control fields control the accessor only. Complete controllability is investigated for arbitrary finite dimensional quantum systems and exemplified by 2 and 3 dimensional systems. The scheme exhibits some advantages; it uses less qubits in accessor and does not depend on the energy-level structure of the controlled system.

H. C. Fu; Hui Dong; X. F. Liu; C. P. Sun

2008-07-09T23:59:59.000Z

210

SAFETY SYSTEM FOR CONTROL ROD  

DOE Patents (OSTI)

A structure for monitoring the structural continuity of a control rod foi a neutron reactor is presented. A electric conductor readily breakable under mechanical stress is fastened along the length of the control rod at a plurality of positions and forms a closed circuit with remote electrical components responsive to an open circuit. A portion of the conductor between the control rod and said components is helically wound to allow free and normally unrestricted movement of the segment of conductor secured to the control rod relative to the remote components. Any break in the circuit is indicative of control rod breakage. (AEC)

Paget, J.A.

1963-05-14T23:59:59.000Z

211

Improving accessibility to statistical graphs: the iGraph-Lite system  

Science Conference Proceedings (OSTI)

Information is often presented in graphical form. Unfortunately, current assistive technologies such as screen readers are not well-equipped to handle these representations. To provide accessibility to graphs published in ``The Daily" (Statistics Canada's ... Keywords: accessibility (blind and visually impaired), natural language interaction, statistical graphs

Leo Ferres; Petro Verkhogliad; Gitte Lindgaard; Louis Boucher; Antoine Chretien; Martin Lachance

2007-10-01T23:59:59.000Z

212

Control of non-controllable quantum systems: A quantum control algorithm based on Grover iteration  

E-Print Network (OSTI)

A new notion of controllability, eigenstate controllability, is defined for finite-dimensional bilinear quantum mechanical systems which are neither strongly completely controllably nor completely controllable. And a quantum control algorithm based on Grover iteration is designed to perform a quantum control task of steering a system, which is eigenstate controllable but may not be (strongly) completely controllable, from an arbitrary state to a target state.

Chen-Bin Zhang; Dao-Yi Dong; Zong-Hai Chen

2005-03-02T23:59:59.000Z

213

Control system for solar heating and cooling  

DOE Green Energy (OSTI)

A control system is being developed that will be capable of operating solar heating and cooling systems covering a wide range of configurations, and using different operating strategies that may be optimal for different climatic regions. To insure widespread applicability of the control system, it is being designed to allow for modification for operating with essentially all practical heating and cooling system configurations and control algorithms simply by interchange of replaceable modules in the circuitry. An experimental heating and cooling system, the main purpose of which is to allow testing and exercise of the controller, was designed so that it could be operated in these various configurations.

Wahlig, M.; Binnall, E.; Dols, C.; Graven, R.; Selph, F.; Shaw, R.; Simmons, M.

1975-08-01T23:59:59.000Z

214

SUBSURFACE REPOSITORY INTEGRATED CONTROL SYSTEM DESIGN  

Science Conference Proceedings (OSTI)

The purpose of this document is to develop preliminary high-level functional and physical control system architectures for the proposed subsurface repository at Yucca Mountain. This document outlines overall control system concepts that encompass and integrate the many diverse systems being considered for use within the subsurface repository. This document presents integrated design concepts for monitoring and controlling the diverse set of subsurface operations. The subsurface repository design will be composed of a series of diverse systems that will be integrated to accomplish a set of overall functions and objectives. The subsurface repository contains several Instrumentation and Control (I&C) related systems including: waste emplacement systems, ventilation systems, communication systems, radiation monitoring systems, rail transportation systems, ground control monitoring systems, utility monitoring systems (electrical, lighting, water, compressed air, etc.), fire detection and protection systems, retrieval systems, and performance confirmation systems. Each of these systems involve some level of I&C and will typically be integrated over a data communication network. The subsurface I&C systems will also integrate with multiple surface-based site-wide systems such as emergency response, health physics, security and safeguards, communications, utilities and others. The scope and primary objectives of this analysis are to: (1) Identify preliminary system level functions and interface needs (Presented in the functional diagrams in Section 7.2). (2) Examine the overall system complexity and determine how and on what levels these control systems will be controlled and integrated (Presented in Section 7.2). (3) Develop a preliminary subsurface facility-wide design for an overall control system architecture, and depict this design by a series of control system functional block diagrams (Presented in Section 7.2). (4) Develop a series of physical architectures that present preliminary concepts for integrating the diverse set of control systems to be used within the subsurface repository facility (Presented in Section 7.3). (5) Develop initial concepts for an overall subsurface data communication system that can be used to integrate critical and data-intensive control systems (Presented in Section 7.4). (6) Discuss technology trends and control system design issues (Presented in Section 7.5).

C.J. Fernado

1998-09-17T23:59:59.000Z

215

Analytic Controllability of Time-Dependent Quantum Control Systems  

E-Print Network (OSTI)

The question of controllability is investigated for a quantum control system in which the Hamiltonian operator components carry explicit time dependence which is not under the control of an external agent. We consider the general situation in which the state moves in an infinite-dimensional Hilbert space, a drift term is present, and the operators driving the state evolution may be unbounded. However, considerations are restricted by the assumption that there exists an analytic domain, dense in the state space, on which solutions of the controlled Schrodinger equation may be expressed globally in exponential form. The issue of controllability then naturally focuses on the ability to steer the quantum state on a finite-dimensional submanifold of the unit sphere in Hilbert space -- and thus on analytic controllability. A relatively straightforward strategy allows the extension of Lie-algebraic conditions for strong analytic controllability derived earlier for the simpler, time-independent system in which the drift Hamiltonian and the interaction Hamiltonia have no intrinsic time dependence. Enlarging the state space by one dimension corresponding to the time variable, we construct an augmented control system that can be treated as time-independent. Methods developed by Kunita can then be implemented to establish controllability conditions for the one-dimension-reduced system defined by the original time-dependent Schrodinger control problem. The applicability of the resulting theorem is illustrated with selected examples.

Chunhua Lan; Tzyh-Jong Tarn; Quo-Shin Chi; John W. Clark

2004-09-22T23:59:59.000Z

216

Safe controllers design for industrial automation systems  

Science Conference Proceedings (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

217

Adding PCs to SLC Control System  

SciTech Connect

The SLAC Controls Department has interfaced IBM-Compatible PCs to the SLC Control System, for use by the Final Focus Test Beam (FFTB) experimenters, who are building new accelerator equipment and developing and testing it at their home institutions. They will bring the equipment to SLAC and integrate it into the control system using a new software package. The machine physicists and operators will use the existing SLC control system applications and database device types to control and monitor the equipment. The PCs support a limited control environment: they run DOS and exchange messages with the existing control system via TCP/IP over ethernet, using the new SLC Area Message Service. This mechanism will also allow SLC to implement other commercial device controllers that can communicate over ethernet and run the same software interface code.

Lahey, T.; Levitt, S.; MacKenzie, R.; Spencer, N.; Underwood, K.

1993-05-01T23:59:59.000Z

218

A Mathematical Framework for the Analysis of Cyber-Resilient Control Systems  

Science Conference Proceedings (OSTI)

The increasingly recognized vulnerability of industrial control systems to cyber-attacks has inspired a considerable amount of research into techniques for cyber-resilient control systems. The majority of this effort involves the application of well known information security (IT) techniques to control system networks. While these efforts are important to protect the control systems that operate critical infrastructure, they are never perfectly effective. Little research has focused on the design of closed-loop dynamics that are resilient to cyber-attack. The majority of control system protection measures are concerned with how to prevent unauthorized access and protect data integrity. We believe that the ability to analyze how an attacker can effect the closed loop dynamics of a control system configuration once they have access is just as important to the overall security of a control system. To begin to analyze this problem, consistent mathematical definitions of concepts within resilient control need to be established so that a mathematical analysis of the vulnerabilities and resiliencies of a particular control system design methodology and configuration can be made. In this paper, we propose rigorous definitions for state awareness, operational normalcy, and resiliency as they relate to control systems. We will also discuss some mathematical consequences that arise from the proposed definitions. The goal is to begin to develop a mathematical framework and testable conditions for resiliency that can be used to build a sound theoretical foundation for resilient control research.

Melin, Alexander M [ORNL; Ferragut, Erik M [ORNL; Laska, Jason A [ORNL; Fugate, David L [ORNL; Kisner, Roger [ORNL

2013-01-01T23:59:59.000Z

219

Scientific Access  

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

Scientific Access The APS is a open user facility that makes beam time available to the international scientific community through a peer-reviewed proposal process. Two access...

220

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

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

Control system for heat exchangers fans in a refrigeration system  

Science Conference Proceedings (OSTI)

The paper presents a method for controlling evaporator and condenser fans in a refrigeration system. The refrigeration system includes a refrigerant circuit defined by a compressor, a condenser, a throttling device, and an evaporator. The system includes ... Keywords: controlling, fan, refrigeration system, variable frequency drive unit

Cristian Iosifescu; Valeriu Damian; C?lin Ciufudean

2010-05-01T23:59:59.000Z

222

Resilient Control Systems: Next Generation Design Research  

Science Conference Proceedings (OSTI)

Since digital control systems were introduced to the market more than 30 years ago, the operational efficiency and stability gained through their use have fueled our migration and ultimate dependence on them for the monitoring and control of critical infrastructure. While these systems have been designed for functionality and reliability, a hostile cyber environment and uncertainties in complex networks and human interactions have placed additional parameters on the design expectations for control systems.

Craig Rieger

2009-05-01T23:59:59.000Z

223

Control system for wind-powered generators  

DOE Green Energy (OSTI)

In a system of wind-powered generators, a reliable yet inexpensive control system is desirable. Such a system would be completely automatic so it could be left unattended for long periods. It would respond to electrical representations of data such as bearing temperature, vibration, wind velocity, turbine velocity, torque, or any other pertinent data. It would respond by starting or stopping the turbine, controlling the loading, or sounding an alarm. A microprocessor-based controller capable of these functions is described.

Kroth, G.J.

1977-05-01T23:59:59.000Z

224

Wireless Demand Response Controls for HVAC Systems  

E-Print Network (OSTI)

Response Controls for HVAC Systems Clifford Federspiel,tests. Figure 5: Specific HVAC electric power consumptioncontrol, demand response, HVAC, wireless Executive Summary

Federspiel, Clifford

2010-01-01T23:59:59.000Z

225

R&D ERL: Controls System  

SciTech Connect

This paper examines the equipment and software from which the controls system interface for the Energy Recovery Linac (ERL) will be implemented at the Brookhaven National Laboratory.

Hoff, L.; Jamilkowski, J.

2010-01-01T23:59:59.000Z

226

Network aspects of the Fermilab control system  

SciTech Connect

The control system of the Fermi National Accelerator is a heavily computerized network of distributed processors. One part of the control system includes a multidrop network of eleven Lockheed MAC-16 processors, a Digital Equipment Corporation PDP-11 computer, a Xerox 530, and a Control Data 6600 system. These computers exchange information using serial hardware and dedicated cable buses. The individual functions of the central processing units in this network, the message protocols for computer communications, and design guidelines for future distributed processing control systems are discussed.

Barton, H.R. Jr.

1977-01-01T23:59:59.000Z

227

Advanced nonlinear control of complex power systems.  

E-Print Network (OSTI)

??Nowadays, advanced controller design is called upon to guarantee the secure and reliable operation of power systems. To meet this requirement, this work proposed three… (more)

Li, Hong Yin.

2008-01-01T23:59:59.000Z

228

On Cyber Security for Networked Control Systems  

E-Print Network (OSTI)

security efforts by establishing the national SCADA test bed program INL [INL/EXT- 05-00671, Idaho National Laboratory. US-CERT [2008], Control Systems Security

Amin, Saurabh

2011-01-01T23:59:59.000Z

229

CONTROL SYSTEM FOR SOLAR HEATING and COOLING  

E-Print Network (OSTI)

Meeting, Los Angeles, California, July 28 - August 1, 1975),Lawrence Berkeley Laboratory University of CaliforniaBerkeley, California 94720 August 1975 A control system is

Dols, C.

2010-01-01T23:59:59.000Z

230

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, James F. (Bonneville County, ID); Koenig, John F. (Idaho Falls, ID)

1985-01-01T23:59:59.000Z

231

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

232

Preservation of and permanent access to electronic information resources: A system perspective  

Science Conference Proceedings (OSTI)

The rapid growth in the creation and dissemination of electronic information has emphasized the digital environment's speed and ease of dissemination often with little regard for its long-term preservation and access. But, electronic information is fragile ...

Gail Hodge

2005-01-01T23:59:59.000Z

233

On optimising data access via materialised methods in object-oriented systems  

Science Conference Proceedings (OSTI)

Optimising access to data returned by methods is an important issue in object–oriented programs, databases, and distributed object environments. Since methods are written in a high–level programming language, optimising their executions is ...

Juliusz Jezierski; Mariusz Masewicz; Robert Wrembel

2004-10-01T23:59:59.000Z

234

Portable, remote environmental control system  

Science Conference Proceedings (OSTI)

A portable thermostat is coupled to the control unit of a heating or cooling device through a radio link. The RF signal transmitted by the thermostat is encoded and then decoded by the control unit in order to prevent interference with other similar devices. In order to maximize the life of a battery powering the thermostat, the thermostat calls for the energization of a heating or cooling device by transmitting the RF signal at widely spaced intervals. The heating or cooling device is energized by shunting a pair of terminals, thereby completing an AC control loop. The unit applies the terminals to a storage copacitor during a small portion of each EC cycle to power the control unit while shunting the terminals during the remaining part of the cycle.

Cherry, R.L.; Maes, R.P.; Pfeiffer, G.F.

1984-02-28T23:59:59.000Z

235

The MedAustron Accelerator Control System  

E-Print Network (OSTI)

This paper presents the architecture and design of the MedAustron accelerator control system. This ion therapy and research facility is currently under construction in Wr. Neustadt, Austria. The accelerator and its control system are designed at CERN. This class of machine is characterized by rich sets of configuration data, real-time reconfiguration needs and high stability requirements. The machine is operated according to a pulse-to-pulse modulation scheme. Each beam cycle is described in terms of ion type, energy, beam dimensions, intensity and spill length. The control system is based on a multi-tier architecture with the aim to achieve a clear separation between front-end devices and their controllers. In-house developments cover a main timing system, a light-weight layer to standardize operation and communication of front-end controllers, fast and slow control of power converters and a procedure programming framework for automating high-level control and data analysis tasks.

Gutleber, J; Marchhart, M; Torcato de Matos, C; Dedic, J; Moser, R

2011-01-01T23:59:59.000Z

236

Window Signaling Systems: Control Strategies & Occupant Behavior  

E-Print Network (OSTI)

and L.M Parkins. 1984. “Window-Opening Behavior in OfficeOccupant Response to Window Control Signaling Systems," CBEDaly, A. 2002. “Operable windows and HVAC systems. ” HPAC

Ackerly, Katie; Brager, Gail

2012-01-01T23:59:59.000Z

237

A MICROCOMPUTER CONTROL SYSTEM FOR THE SUPERHILAC THIRD INJECTOR  

E-Print Network (OSTI)

A MICROCOMPUTER CONTROL SYSTEM FOR THE SUPERHILAC THIRD·-··--A MICROCOMPUTER CONTROL SYSTEM FOR THE SUPERHILAC 'L. J. Besse** Abstract A new control system using the latest

Lancaster, H.D.

2010-01-01T23:59:59.000Z

238

Laser Inertial Fusion Energy Control Systems  

Science Conference Proceedings (OSTI)

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

239

Transport control in deterministic ratchet system  

E-Print Network (OSTI)

We study the control of transport properties in a deterministic inertia ratchet system via the extended delay feedback method. A chaotic current of a deterministic inertia ratchet system is controlled to a regular current by stabilizing unstable periodic orbits embedded in a chaotic attractor of the unperturbed system. By selecting an unstable periodic orbit, which has a desired transport property, and stabilizing it via the extended delay feedback method, we can control transport properties of the deterministic inertia ratchet system. Also, we show that the extended delay feedback method can be utilized for separation of particles in the deterministic inertia ratchet system as a particle's initial condition varies.

Woo-Sik Son; Jung-Wan Ryu; Dong-Uk Hwang; Soo-Young Lee; Young-Jai Park; Chil-Min Kim

2006-12-17T23:59:59.000Z

240

The Control System for the Cryogenics in the LHC Tunnel  

E-Print Network (OSTI)

The Large Hadron Collider makes extensive use of superconductors, in magnets for bending and focusing the particles, and in RF cavities for accelerating them, which are operated at 1.9 K and 4.5 K. The process automation for the cryogenic distribution around the accelerator circumference is based on 16 Programmable Logic Controllers, each running 250 control loops, 500 alarms and interlocks, and a phase sequencer. Spread along 27 km and under ionizing radiation, 15 000 cryogenic sensors and actuators are accessed through industrial field networks. We describe the main hardware and software components of the control system, their deployment and commissioning, together with the project organization, challenges faced, and solutions found.

Gomes, P; Antoniotti, F; Avramidou, R; Balle, Ch; Blanco-Viñuela, E; Carminati, Ch; Casas-Cubillos, J; Ciechanowski, M; Dragoneas, A; Dubert, P; Fampris, X; Fluder, C; Fortescue, E; Gaj, W; Gousiou, E; Jeanmonod, N; Jod?owski, P; Karagiannis, F; Klisch, M; López, A; Macuda, P; Malinowski, P; Molina, E; Paiva, S; Patsouli, A; Penacoba, G; Sosin, M; Soubiran, M; Suraci, A; Tovar, A; Vauthier, N; Wolak, T; Zwalinski, L

2008-01-01T23:59:59.000Z

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.


241

Mechanical Systems and Controls Group  

Science Conference Proceedings (OSTI)

... improves and lowers the cost of building ... building information, including real-time sensor data, to ... Systems for Improved Energy Performance Project ...

2013-12-19T23:59:59.000Z

242

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 finite state machine is used to handle the case where a single unit has multiple stages of operation. An optimized coordinator determines the phase of the PWM signals of each unit so that peak demand for power is minimized over each PWM period. Control logic for the PWM function was developed so that the phase could be manipulated by the coordinator. Computer simulations were used to assess the performance of the new strategy and to compare it to levelcrossing logic. The following five metrics were used to assess the performance: 1) magnitude of the control error, 2) start/stop frequency, 3) average power consumption, 4) standard deviation of the power consumption, 5) peak power consumption. The computer simulations showed that the new strategy could reduce peak power consumption by 20% relative to level-crossing logic. The computer simulations also showed that the new strategy increased the magnitude of the space temperature control error by 11% and increased the number of start/stop operations by 27% relative to level-crossing logic.

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

2001-01-01T23:59:59.000Z

243

Teaching the Environment to Control Quantum Systems  

E-Print Network (OSTI)

A non-equilibrium, generally time-dependent, environment whose form is deduced by optimal learning control is shown to provide a means for incoherent manipulation of quantum systems. Incoherent control by the environment (ICE) can serve to steer a system from an initial state to a target state, either mixed or in some cases pure, by exploiting dissipative dynamics. Implementing ICE with either incoherent radiation or a gas as the control is explicitly considered, and the environmental control is characterized by its distribution function. Simulated learning control experiments are performed with simple illustrations to find the shape of the optimal non-equilibrium distribution function that best affects the posed dynamical objectives.

Alexander Pechen; Herschel Rabitz

2006-09-12T23:59:59.000Z

244

Automated flow-temperature-humidity control system  

SciTech Connect

An automated system that controls air flow, temperature, and humidity was developed from a commercially available temperature-humidity indicator and a specially built flow-temperature-humidity control module. Parameters are set using direct-reading dials on the control module. The air flow is maintained using a mass-flow controller while process controllers connected to the indicator regulate humidity and temperature. The system will run indefinitely without need for operator intervention. If the module and indicator are calibrated properly, accurate air flows (+-2% of full scale), temperatures (+-0.3/sup 0/C), and humidities (+-2% RH) can be achieved.

Nelson, G.O.; Taylor, R.D.

1980-10-01T23:59:59.000Z

245

Guidelines help design pneumatic control systems  

Science Conference Proceedings (OSTI)

The three areas of particular interest to the gas-transmission engineer about pneumatic-instrument-operated control valves are (1) the fail-position probability of a system, (2) the designated action required for each component in the pneumatic circuit, and (3) the schematically defined position of each component. Compared with self-operated control valves, the instrument-operated systems perform many more functions; they can control the flow and the volume or flow-volume combinations, with both pressure override and underride, and will adapt conveniently to remote operation. Schematic diagrams illustrate the numerous system designs possible for pressure-regulation, flow-control, and relief-valve duties.

Curry, R.N.

1981-01-26T23:59:59.000Z

246

Report on the SLC control system  

SciTech Connect

The SLC control system is based on a VAX 11/780 Host computer with approximately 50 microprocessor clusters which provide distributed intelligence and control of all CAMAC interface modules. This paper will present an overview of the system including current status and a description of the software architecture and communication protocols. 8 refs.

Phinney, N.

1985-05-01T23:59:59.000Z

247

Randomized Model Predictive Control for HVAC Systems  

Science Conference Proceedings (OSTI)

Heating, Ventilation and Air Conditioning (HVAC) systems play a fundamental role in maintaining acceptable thermal comfort and Indoor Air Quality (IAQ) levels, essentials for occupants well-being. Since performing this task implies high energy requirements, ... Keywords: Copulas, Learning, Randomized Model Predictive Control, Smart Buildings, Sustainable Control Systems

Alessandra Parisio, Damiano Varagnolo, Daniel Risberg, Giorgio Pattarello, Marco Molinari, Karl H. Johansson

2013-11-01T23:59:59.000Z

248

Multi-agent neural business control system  

Science Conference Proceedings (OSTI)

Small to medium sized companies require a business control mechanism in order to monitor their modus operandi and analyse whether they are achieving their goals. A tool for the decision support process was developed based on a multi-agent system that ... Keywords: Agents technology, Business control system, Case-based reasoning, Experience management, Maximum Likelihood Hebbian Learning, Reasoning

M. Lourdes Borrajo; Juan M. Corchado; Emilio S. Corchado; María A. Pellicer; Javier Bajo

2010-03-01T23:59:59.000Z

249

Automatic control in electric power systems  

Science Conference Proceedings (OSTI)

The recent progress in the application of automatic controls to electric power systems is outlined. After a brief review of present trends in power system planning and operation, the role of computers and of modern control methods and techniques in optimal ...

G. Quazza

1970-01-01T23:59:59.000Z

250

Control System Commissioning for Enhanced Building Operations  

E-Print Network (OSTI)

This paper highlights the import role control systems play in the operation of modern buildings and describes ways to improve the final stage of commissioning. We also describe practical issues associated with modern IT-oriented control systems that can impact a commissioning exercise.

Salsbury, T. I.; Singhal, A.

2003-01-01T23:59:59.000Z

251

Application of self-organizing systems in power systems control  

Science Conference Proceedings (OSTI)

The European electrical transmission network is operated increasingly close to its operational limits due to market integration and increased feed-in by renewable energies. For this reason, innovative solutions for a reliable, secure and efficient network ... Keywords: FACTS, multiagent systems, power flow control, power system control, self-organizing systems, smart grids

Sven C. Müller; Ulf Häger; Christian Rehtanz; Horst F. Wedde

2012-06-01T23:59:59.000Z

252

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.

253

Design of Control Systems for HVAC Applications  

E-Print Network (OSTI)

The design and application of temperature control systems on a commercial building will bring the question to mind: Should the system be Pneumatic? Should it be Electronic? There is concern as to which system will be more appropriate to a certain project. With cost, maintenance, performance, dependability, and the cost of energy as a main concern of owners, the temperature control system has become an important part of efficient utilization of energy. Application of temperature control systems to heating, ventilating, and air conditioning systems has become an integral part of energy management. The first phase of the program will address the problem of selection of a type of system that will be cost and energy efficient, with a minimum maintenance program. One area to be covered will be the technician and his ability to service the temperature control systems, in addition to information on the schools and technical training. The availability of trained and experienced service technicians creates a major problem for remote towns and communities. Control systems are integrated to energy management systems. Without proper maintenance the energy savings will not perform at their design level. A sub-topic on up-to-date temperature control systems with retrofit needs will he included in the presentation.

Smith, A. L.

1984-01-01T23:59:59.000Z

254

Energy management/dimming system and control  

SciTech Connect

A method is described for operating a dimming system connected to a fluorescent lighting system. The fluorescent lighting system includes a ballast, fluorescent lamps and an AC source. The dimming system includes a switch connected in series with the ballast and a dimming control circuit for controlling the switch, the dimming control circuit adapted to turn on and off the switch at a high frequency during a notch period within each half-cycle of current supplied to the ballast by the AC source. It adapts to turn on the switch during the portions of each half-cycle outside of the notch period, the location and duration of the notch period being controlled by the dimming control circuit to provide a variable light output from the lighting system in response to a level command.

Alley, R.P.; Bicknell, W.H.; Routh, K.C.

1987-05-05T23:59:59.000Z

255

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

256

Power control system and method  

SciTech Connect

A power system includes an energy harvesting device, a battery coupled to the energy harvesting device, and a circuit coupled to the energy harvesting device and the battery. The circuit is adapted to deliver power to a load by providing power generated by the energy harvesting device to the load without delivering excess power to the battery and to supplement the power generated by the energy harvesting device with power from the battery if the power generated by the energy harvesting device is insufficient to fully power the load. A method of operating the power system is also provided.

Steigerwald, Robert Louis (Burnt Hills, NY); Anderson, Todd Alan (Niskayuna, NY)

2008-02-19T23:59:59.000Z

257

Role Based Access Control  

Science Conference Proceedings (OSTI)

... This book explains these components of RBAC, as well as how to support and administer RBAC in a networked environment and how to integrate it ...

258

ACCESS/VISITOR CONTROL  

... enter last keeping visual contact at all ... Term used to describe when one person allows another ... all personnel are subject to search of their ...

259

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

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

Electricity Advisory Committee Technology Development Transmission Planning Smart Grid Energy Delivery Systems Cybersecurity Control Systems Security News Archive Control...

260

GENETIC ALGORITHMS CONTROL SYSTEMS ENGINEERING  

E-Print Network (OSTI)

sources. One of related works is an energy-harvesting WSN for a railway monitoring system [6]. In [7.032mW (indoor) to 37mW (direct sunlight) when energy is harvested from solar or 5mW (piezoelectric

Coello, Carlos A. Coello

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

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":""}]}

262

Mercury Emissions Control in Wet FGD Systems  

E-Print Network (OSTI)

The Babcock & Wilcox Company (B&W) and McDermott Technology, Inc. (MTI) have had a continuing program over the past decade for characterizing and optimizing mercury control in flue gas desulfurization (FGD) systems. These efforts have led to the characterization of mercury emissions control at two utility installations and full-scale demonstration (55 MW and 1300 MW) of the effect of a mercury control performance enhancement additive for wet FGD systems. This paper presents the results of the mercury emissions control testing conducted at these two sites. The performance is related to EPA Information Collection Request (ICR) data from an FGD system supplier’s perspective, highlighting the need to consider the effects of system design and operation when evaluating mercury emissions control performance.

Paul S. Nolan; Babcock Wilcox; Kevin E. Redinger; Babcock Wilcox; Gerald T. Amrhein; Gregory A. Kudlac

2002-01-01T23:59:59.000Z

263

A Self-Calibrating Remote Control Chemical Monitoring System  

SciTech Connect

The Susie Mine, part of the Upper Tenmile Mining Area, is located in Rimini, MT about 15 miles southwest of Helena, MT. The Upper Tenmile Creek Mining Area is an EPA Superfund site with 70 abandoned hard rock mines and several residential yards prioritized for clean up. Water from the Susie mine flows into Tenmile Creek from which the city of Helena draws part of its water supply. MSE Technology Applications in Butte, Montana was contracted by the EPA to build a treatment system for the Susie mine effluent and demonstrate a system capable of treating mine waste water in remote locations. The Idaho National Lab was contracted to design, build and demonstrate a low maintenance self-calibrating monitoring system that would monitor multiple sample points, allow remote two-way communications with the control software and allow access to the collected data through a web site. The Automated Chemical Analysis Monitoring (ACAM) system was installed in December 2006. This thesis documents the overall design of the hardware, control software and website, the data collected while MSE-TA’s system was operational, the data collected after MSE-TA’s system was shut down and suggested improvements to the existing system.

Jessica Croft

2007-06-01T23:59:59.000Z

264

CARS Control Anomaly Recognition System: System Concept, Requirements, and Specifications  

Science Conference Proceedings (OSTI)

This report presents results of an initial study aimed at defining the system concept, principal requirements, and functional specification for a control anomaly recognition system (CARS) software tool. The purpose of the CARS software system is to assist nuclear power plant operators in the early detection of faults and anomalies in plant control systems before they cause reactor scrams or component damage. The diagnostic capability technology of CARS can support other process industries' applications b...

2002-04-12T23:59:59.000Z

265

Passive environmental temperature control system  

DOE Patents (OSTI)

Passive environmental heating and cooling systems are described, which utilize heat pipes to transmit heat to or from a thermal reservoir. In a solar heating system, a heat pipe is utilized to carry heat from a solar heat absorber plate that receives sunlight, through a thermal insulation barrier, to a heat storage wall, with the outer end of the pipe which is in contact with the solar absorber being lower than the inner end. The inclining of the heat pipe assures that the portion of working fluid, such as Freon, which is in a liquid phase will fall by gravity to the outer end of the pipe, thereby assuring diode action that prevents the reverse transfer of heat from the reservoir to the outside on cool nights. In a cooling system, the outer end of the pipe which connects to a heat dissipator, is higher than the inner end that is coupled to a cold reservoir, to allow heat transfer only out of the reservoir to the heat dissipator, and not in the reverse direction.

Corliss, John M. (Columbus, OH); Stickford, George H. (Columbus, OH)

1981-01-01T23:59:59.000Z

266

System and method for controlling microgrid  

DOE Patents (OSTI)

A system for controlling a microgrid includes microgrid assets and a tieline for coupling the microgrid to a bulk grid; and a tieline controller coupled to the tieline. At least one of the microgrid assets comprises a different type of asset than another one of the microgrid assets. The tieline controller is configured for providing tieline control signals to adjust active and reactive power in respective microgrid assets in response to commands from the bulk grid operating entity, microgrid system conditions, bulk grid conditions, or combinations thereof.

Bose, Sumit (Niskayuna, NY); Achilles, Alfredo Sebastian (Bavaria, DE); Liu, Yan (Ballston Lake, NY); Ahmed, Emad Ezzat (Munich, DE); Garces, Luis Jose (Niskayuna, NY)

2011-07-19T23:59:59.000Z

267

Online prediction and control nonlinear stochastic systems  

E-Print Network (OSTI)

temperature in district heat- ing systems. · Prediction of power production from the wind turbines located and their application to prediction and control within district heating systems and for prediction of wind power. Here temperature in district heating systems', Techni- cal Report IMM-REP-2002-23, Informatics and Mathematical

268

Operational Experience with the CEBAF Control System  

SciTech Connect

This paper describes our operational experience with the CEBAF control system. CEBAF is operated using a variety of software packages and custom applications. In the spirit of collaboration and software sharing, the current system utilizes code developed at four major laboratories as well as commercial packages and custom applications. The basis of the CEBAF control system is EPICS (Experimental Physics and Industrial Control System), originally developed at LANL and ANL. The CEBAF accelerator is operated primarily using the common EPICS tools such as the archiver, alarm handler and display manager. In order to supplement the features of EPICS, custom applications have been developed and incorporated into the control system using C, C++, and TCL. Additionally, the CEBAF helium plant is controlled using the CEBAF TACL system which requires communications between the two control systems. CATER, a problem tracking program developed at SLAC, has also been integrated into the operational software. Current plans call for the integration of an on-line logbook developed at APS and the internal development of a down-time logger program. We discuss how these various tools and applications are used operationally, the advantages and disadvantages of the systems and the challenges related to integrating this diverse array of software.

K. White; D. Kehne

1995-10-01T23:59:59.000Z

269

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

270

Early warning system for cascading effect control in energy control systems  

Science Conference Proceedings (OSTI)

A way of controlling a cascading effect caused by a failure or a threat in a critical system is using intelligent mechanisms capable of predicting anomalous behaviours and also capable of reacting against them in advance. These mechanisms are known as ... Keywords: SCADA systems, cascading effect, early warning system, energy control systems, forensic techniques, wireless sensor network

Cristina Alcaraz; Angel Balastegui; Javier Lopez

2010-09-01T23:59:59.000Z

271

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

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.

272

Vehicle Technologies Office: Thermal Control and System Integration  

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

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...

273

Control Systems Cyber Security Standards Support Activities  

Science Conference Proceedings (OSTI)

The Department of Homeland Security’s Control Systems Security Program (CSSP) is working with industry to secure critical infrastructure sectors from cyber intrusions that could compromise control systems. This document describes CSSP’s current activities with industry organizations in developing cyber security standards for control systems. In addition, it summarizes the standards work being conducted by organizations within the sector and provides a brief listing of sector meetings and conferences that might be of interest for each sector. Control systems cyber security standards are part of a rapidly changing environment. The participation of CSSP in the development effort for these standards has provided consistency in the technical content of the standards while ensuring that information developed by CSSP is included.

Robert Evans

2009-01-01T23:59:59.000Z

274

CONTROL SYSTEM FOR SOLAR HEATING and COOLING  

E-Print Network (OSTI)

l U CONTROL SYSTEM FOR SOLAR HEATING AND COOLING* M.Wahlig,be capable of operating solar heating and cooling systemsand now transferred to ERDA, on solar heating and cooling of

Dols, C.

2010-01-01T23:59:59.000Z

275

Install an Automatic Blowdown Control System  

SciTech Connect

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

Not Available

2006-01-01T23:59:59.000Z

276

Steam Turbine Hydraulic Control system Maintenance Guide  

Science Conference Proceedings (OSTI)

Steam turbine hydraulic control system maintenance problems have been a significant factor in plant power reductions, shutdowns, and lost generation. This guide provides recommendations to improve the reliability of the hydraulic components and fluid.

1996-12-31T23:59:59.000Z

277

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

278

Occupant Response to Window Control Signaling Systems  

E-Print Network (OSTI)

A.  (2002).  Operable windows and  HVAC systems.  HPAC Simulation of the effects of window opening and heating Dear, R.  (2004).  Operable Windows, Personal Control and 

Ackerly, Katherine

2012-01-01T23:59:59.000Z

279

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

280

Time-optimal Control of Spin Systems  

E-Print Network (OSTI)

The paper discusses various aspects of time-optimal control of quantum spin systems, modelled as right-invariant systems on a compact Lie group G. The main results are the reduction of such a system to an equivalent system on a homogeneous space G/H, and the explicit determination of optimal trajectories on G/H in the case where G/H is a Riemannian symmetric space. These results are mainly obtained by using methods from Lie theory and geometric control.

Jan Swoboda

2006-01-19T23:59:59.000Z

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.


281

Battery monitoring and charger control system  

SciTech Connect

A battery cell controlled charging system, consisting of a display unit, battery cell probes, a battery charger and circuitry for controlling the charger, monitors the specific gravity, electrolyte level and temperature control of each cell in a multi-cell lead-acid battery and uses the information to automatically charge the battery when a cell or cells become out of specification while restricting overcharging which is damaging to cells.

Barry, G.H.; Dahl, E.A.

1983-06-14T23:59:59.000Z

282

Randomized control of open quantum systems  

E-Print Network (OSTI)

The problem of open-loop dynamical control of generic open quantum systems is addressed. In particular, I focus on the task of effectively switching off environmental couplings responsible for unwanted decoherence and dissipation effects. After revisiting the standard framework for dynamical decoupling via deterministic controls, I describe a different approach whereby the controller intentionally acquires a random component. An explicit error bound on worst-case performance of stochastic decoupling is presented.

Lorenza Viola

2006-01-16T23:59:59.000Z

283

Autonomous robotic weed control systems: A review  

Science Conference Proceedings (OSTI)

Autonomous robotic weed control systems hold promise toward the automation of one of agriculture's few remaining unmechanized and drudging tasks, hand weed control. Robotic technology may also provide a means of reducing agriculture's current dependency ... Keywords: Geospatial technology, Machine vision, Pest management, Precision agriculture, Robot, Weed recognition

D. C. Slaughter; D. K. Giles; D. Downey

2008-04-01T23:59:59.000Z

284

Advanced control and information systems `97  

Science Conference Proceedings (OSTI)

Data are presented on advanced control and information systems, describing specific application, control strategy, economics, commercial installations, and licensor. Uses include alkylation, amine treating, catalytic reforming, cryogenic separation, catalytic cracking, hydrocracking, hydrogen production, LNG separation, lube oils, olefins, plant scheduling, polymers, refineries, steam reforming, and utilities.

NONE

1997-09-01T23:59:59.000Z

285

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 entails modeling and design of the necessary subsystems and design, manufacture and test of a full laboratory prototype. The project continues to advance, but is behind the revised (14-month) schedule. Tasks 1-3 (Modeling, Specification and Design) are all essentially complete. The test bench for the Test and Evaluation (Tasks 4 & 5) and the laboratory prototype were constructed by the end of the period. During assembly, however, several of the key subassemblies became galled together, and had to be cut apart. These parts are being remachined with harder surfaces to prevent recurrence of this problem. One key component, the MR damper mandrel, has been redesigned into a three-piece assembly which will facilitate assembly and reduce the cost of replacement of worn components. The remade parts will be delivered by April 19, and the prototype assembled. Testing will begin during the first week of May and is anticipated to be completed before the revised end date for Phase I, May 31, 2004.

Martin E. Cobern

2004-04-17T23:59:59.000Z

286

LED lamp color control system and method  

DOE Patents (OSTI)

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

287

Using Building Control System for Commissioning  

E-Print Network (OSTI)

This paper summarizes the different approaches developed during Annex 40 (research project of International Energy Agency - Energy Conservation in Buildings & Community Systems ) for carrying out commissioning activities using the control system. During our work we have found that control systems in buildings have the potential to greatly improve the commissioning process. In particular, control systems can be used to carry out automated testing on the energy systems in a building in a systematic way. Technologies for carrying out automated commissioning are still in their infancy and very few tools are available for practitioners to use. However, our work has demonstrated that tools can be built using existing infrastructure at relatively low cost. In many cases, tools are software programs that can be implemented on most microprocessor-based platforms.

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

2004-01-01T23:59:59.000Z

288

Biotelemetry system for Epilepsy Seizure Control  

SciTech Connect

The Biotelemetry System for Epilepsy Seizure Control Project developed and tested an automated telemetry system for use in an epileptic seizure prevention device that precisely controls localized brain temperature. This project was a result of a Department of Energy (DOE) Global Initiatives for Proliferation Prevention (GIPP) grant to the Kansas City Plant (KCP), Argonne National Laboratory (ANL), and Pacific Northwest National Laboratory (PNNL) to partner with Flint Hills Scientific, LLC, Lawrence, KS and Biophysical Laboratory Ltd (BIOFIL), Sarov, Russia to develop a method to help control epileptic seizures.

Smith, LaCurtise; Bohnert, George W.

2009-07-02T23:59:59.000Z

289

Battery charging control methods, electric vehicle charging methods, battery charging apparatuses and rechargeable battery systems  

DOE Patents (OSTI)

Battery charging control methods, electric vehicle charging methods, battery charging apparatuses and rechargeable battery systems. According to one aspect, a battery charging control method includes accessing information regarding a presence of at least one of a surplus and a deficiency of electrical energy upon an electrical power distribution system at a plurality of different moments in time, and using the information, controlling an adjustment of an amount of the electrical energy provided from the electrical power distribution system to a rechargeable battery to charge the rechargeable battery.

Tuffner, Francis K. (Richland, WA); Kintner-Meyer, Michael C. W. (Richland, WA); Hammerstrom, Donald J. (West Richland, WA); Pratt, Richard M. (Richland, WA)

2012-05-22T23:59:59.000Z

290

Secure Control Systems for the Energy Sector  

Science Conference Proceedings (OSTI)

Schweitzer Engineering Laboratories (SEL) will conduct the Hallmark Project to address the need to reduce the risk of energy disruptions because of cyber incidents on control systems. The goals is to develop solutions that can be both applied to existing control systems and designed into new control systems to add the security measures needed to mitigate energy network vulnerabilities. The scope of the Hallmark Project contains four primary elements: 1. Technology transfer of the Secure Supervisory Control and Data Acquisition (SCADA) Communications Protocol (SSCP) from Pacific Northwest National Laboratories (PNNL) to Schweitzer Engineering Laboratories (SEL). The project shall use this technology to develop a Federal Information Processing Standard (FIPS) 140-2 compliant original equipment manufacturer (OEM) module to be called a Cryptographic Daughter Card (CDC) with the ability to directly connect to any PC enabling that computer to securely communicate across serial to field devices. Validate the OEM capabilities with another vendor. 2. Development of a Link Authenticator Module (LAM) using the FIPS 140-2 validated Secure SCADA Communications Protocol (SSCP) CDC module with a central management software kit. 3. Validation of the CDC and Link Authenticator modules via laboratory and field tests. 4. Creation of documents that record the impact of the Link Authenticator to the operators of control systems and on the control system itself. The information in the documents can assist others with technology deployment and maintenance.

Smith, Rhett; Campbell, Jack; Hadley, Mark

2012-03-31T23:59:59.000Z

291

Wireless Demand Response Controls for HVAC Systems  

Science Conference Proceedings (OSTI)

The objectives of this scoping study were to develop and test control software and wireless hardware that could enable closed-loop, zone-temperature-based demand response in buildings that have either pneumatic controls or legacy digital controls that cannot be used as part of a demand response automation system. We designed a SOAP client that is compatible with the Demand Response Automation Server (DRAS) being used by the IOUs in California for their CPP program, design the DR control software, investigated the use of cellular routers for connecting to the DRAS, and tested the wireless DR system with an emulator running a calibrated model of a working building. The results show that the wireless DR system can shed approximately 1.5 Watts per design CFM on the design day in a hot, inland climate in California while keeping temperatures within the limits of ASHRAE Standard 55: Thermal Environmental Conditions for Human Occupancy.

Federspiel, Clifford

2009-06-30T23:59:59.000Z

292

Waste receiving and processing plant control system; system design description  

Science Conference Proceedings (OSTI)

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

293

Model-driven design and implementation of discrete event control for a machine tool control system  

E-Print Network (OSTI)

Symposium on Computer-Aided Control System Design. [7] E. M.of machine tool control system Mode Control Supervisor (MCS)of a discrete event control system depends entirely on the

Liu, Y.; Li, W.; Yamazaki, K.; Fujishima, M.

2007-01-01T23:59:59.000Z

294

Cylindrical Induction Melter Modicon Control System  

SciTech Connect

In the last several years an extensive R{ampersand}D program has been underway to develop a vitrification system to stabilize Americium (Am) and Curium (Cm) inventories at SRS. This report documents the Modicon control system designed for the 3 inch Cylindrical Induction Melter (CIM).

Weeks, G.E. [Westinghouse Savannah River Company, AIKEN, SC (United States)

1998-04-01T23:59:59.000Z

295

Comparison of Routable Control System Security Approaches  

SciTech Connect

This document is an supplement to the 'Secure and Efficient Routable Control Systems.' It addressed security in routable control system communication. The control system environment that monitors and manages the power grid historically has utilized serial communication mechanisms. Leased-line serial communication environments operating at 1200 to 9600 baud rates are common. However, recent trends show that communication media such as fiber, optical carrier 3 (OC-3) speeds, mesh-based high-speed wireless, and the Internet are becoming the media of choice. In addition, a dichotomy has developed between the electrical transmission and distribution environments, with more modern communication infrastructures deployed by transmission utilities. The preceding diagram represents a typical control system. The Communication Links cloud supports all of the communication mechanisms a utility might deploy between the control center and devices in the field. Current methodologies used for security implementations are primarily led by single vendors or standards bodies. However, these entities tend to focus on individual protocols. The result is an environment that contains a mixture of security solutions that may only address some communication protocols at an increasing operational burden for the utility. A single approach is needed that meets operational requirements, is simple to operate, and provides the necessary level of security for all control system communication. The solution should be application independent (e.g., Distributed Network Protocol/Internet Protocol [DNP/IP], International Electrotechnical Commission [IEC] C37.118, Object Linking and Embedding for Process Control [OPC], etc.) and focus on the transport layer. In an ideal setting, a well-designed suite of standards for control system communication will be used for vendor implementation and compliance testing. An expected outcome of this effort is an international standard.

Edgar, Thomas W.; Hadley, Mark D.; Carroll, Thomas E.; Manz, David O.; Winn, Jennifer D.

2011-06-01T23:59:59.000Z

296

Stochastic Control Analysis for Biochemical Reaction Systems  

E-Print Network (OSTI)

In this paper, we investigate how stochastic reaction processes are affected by external perturbations. We describe an extension of the deterministic metabolic control analysis (MCA) to the stochastic regime. We introduce stochastic sensitivities for mean and covariance values of reactant concentrations and reaction fluxes and show that there exist MCA-like summation theorems among these sensitivities. The summation theorems for flux variances are shown to depend on the size of the measurement time window ($\\epsilon$), within which reaction events are counted for measuring a single flux. The degree of the $\\epsilon$-dependency can become significant for processes involving multi-time-scale dynamics and is estimated by introducing a new measure of time scale separation. This $\\epsilon$-dependency is shown to be closely related to the power-law scaling observed in flux fluctuations in various complex networks. We propose a systematic way to control fluctuations of reactant concentrations while minimizing changes in mean concentration levels. Such orthogonal control is obtained by introducing a control vector indicating the strength and direction of parameter perturbations leading to a sensitive control. We also propose a possible implication in the control of flux fluctuation: The control distribution for flux fluctuations changes with the measurement time window size, $\\epsilon$. When a control engineer applies a specific control operation on a reaction system, the system can respond contrary to what is expected, depending on the time window size $\\epsilon$.

Kyung Hyuk Kim; Herbert M. Sauro

2009-04-20T23:59:59.000Z

297

Open Access  

E-Print Network (OSTI)

© 2007 Brewer; licensee BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License

Earl J Brewer; Earl J Brewer

2007-01-01T23:59:59.000Z

298

Chapter 14: Wind Turbine Control Systems  

DOE Green Energy (OSTI)

Wind turbines are complex, nonlinear, dynamic systems forced by gravity, stochastic wind disturbances, and gravitational, centrifugal, and gyroscopic loads. The aerodynamic behavior of wind turbines is nonlinear, unsteady, and complex. Turbine rotors are subjected to a complicated three-dimensional turbulent wind inflow field that drives fatigue loading. Wind turbine modeling is also complex and challenging. Accurate models must contain many degrees of freedom (DOF) to capture the most important dynamic effects. The rotation of the rotor adds complexity to the dynamics modeling. Designs of control algorithms for wind turbines must account for these complexities. Algorithms must capture the most important turbine dynamics without being too complex and unwieldy. Off-the-shelf commercial soft ware is seldom adequate for wind turbine dynamics modeling. Instead, specialized dynamic simulation codes are usually required to model all the important nonlinear effects. As illustrated in Figure 14-1, a wind turbine control system consists of sensors, actuators and a system that ties these elements together. A hardware or software system processes input signals from the sensors and generates output signals for actuators. The main goal of the controller is to modify the operating states of the turbine to maintain safe turbine operation, maximize power, mitigate damaging fatigue loads, and detect fault conditions. A supervisory control system starts and stops the machine, yaws the turbine when there is a significant yaw misalignment, detects fault conditions, and performs emergency shut-downs. Other parts of the controller are intended to maximize power and reduce loads during normal turbine operation.

Wright, A. D.

2009-01-01T23:59:59.000Z

299

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.degree. and 270.degree. 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, Robert V. (St. Louis County, MO)

1983-10-18T23:59:59.000Z

300

Zone control system for energy conservation  

SciTech Connect

A zone control system adapted to control temperatures in a building is described having a temperature modifying plant to modify the temperature of a heat exchange medium, circulator means to circulate the medium, and flow control means to regulate the flow of the medium. The system includes zone thermostats with one thermostat per controlled zone, and with each thermostat including temperature responsive means and heat anticipator means to modify the temperature of the temperature responsive means; at least one of the flow control means per controlled zone, and each of the flow control means being capable of energizing the circulator means when the flow control means operates to permit circulation of the heat exchange medium; each zone thermostat including on-off timer means having normally open switch means, and further including intermediate on timer means having normally open switch means; first zone control circuit means including a temperature responsive means of the first thermostat, a heat anticipator means of the first thermostat, and circuit means with normally closed switch means capable of energizing a first flow control means to an open position upon the first thermostat calling for operation of the temperature modifying plant. The timer means of the first thermostat is actuated by the first thermostat calling for operation of the temperature modifying plant; a first of the on-off timer means operating its switch means to an on state after a fixed time interval to latch the first flow control means into an open condition; a first of the intermediate on timer means operating its switch means to an on state after a second fixed time interval to energize the modifying plant and complete a circuit to a secondary anticipation heater of a second zone thermostat capable of adding heat to the second zone thermostat; and the first on-off timer means maintaining its switch means closed.

Nelson, L.W.

1986-04-15T23:59:59.000Z

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

Actively controlled vibration welding system and method  

DOE Patents (OSTI)

A vibration welding system includes a controller, welding horn, an active material element, and anvil assembly. The assembly may include an anvil body connected to a back plate and support member. The element, e.g., a piezoelectric stack or shape memory alloy, is positioned with respect to the assembly. The horn vibrates in a desirable first direction to form a weld on a work piece. The element controls any vibrations in a second direction by applying calibrated response to the anvil body in the second direction. A method for controlling undesirable vibrations in the system includes positioning the element with respect to the anvil assembly, connecting the anvil body to the support member through the back plate, vibrating the horn in a desirable first direction, and transmitting an input signal to the element to control vibration in an undesirable second direction.

Cai, Wayne W.; Kang, Bongsu; Tan, Chin-An

2013-04-02T23:59:59.000Z

302

Fuzzy adaptive control for the actuators position control and modeling of an expert system  

Science Conference Proceedings (OSTI)

In this paper, a heating, ventilating and air-conditioning (HVAC) system was designed and two different damper gap rates (actuators position) of the HVAC system were controlled by a conventional PID (proportional-integral-derivative) controller. One ... Keywords: Actuator position control, Air flow control, An expert system, Fuzzy adaptive control (FAC), Humidity control, Modeling, PID control, Software architecture

Servet Soyguder; Hasan Alli

2010-03-01T23:59:59.000Z

303

INTEGRATED CONTROL OF NEXT GENERATION POWER SYSTEM  

Science Conference Proceedings (OSTI)

Control methodologies provide the necessary data acquisition, analysis and corrective actions needed to maintain the state of an electric power system within acceptable operating limits. These methods are primarily software-based algorithms that are nonfunctional unless properly integrated with system data and the appropriate control devices. Components of the control of power systems today include protective relays, supervisory control and data acquisition (SCADA), distribution automation (DA), feeder automation, software agents, sensors, control devices and communications. Necessary corrective actions are still accomplished using large electromechanical devices such as vacuum, oil and gas-insulated breakers, capacitor banks, regulators, transformer tap changers, reclosers, generators, and more recently FACTS (flexible AC transmission system) devices. The recent evolution of multi-agent system (MAS) technologies has been reviewed and effort made to integrate MAS into next generation power systems. A MAS can be defined as ��a loosely-coupled network of problem solvers that work together to solve problems that are beyond their individual capabilities��. These problem solvers, often called agents, are autonomous and may be heterogeneous in nature. This project has shown that a MAS has significant advantages over a single, monolithic, centralized problem solver for next generation power systems. Various communication media are being used in the electric power system today, including copper, optical fiber and power line carrier (PLC) as well as wireless technologies. These technologies have enabled the deployment of substation automation (SA) at many facilities. Recently, carrier and wireless technologies have been developed and demonstrated on a pilot basis. Hence, efforts have been made by this project to penetrate these communication technologies as an infrastructure for next generation power systems. This project has thus pursued efforts to use specific MAS methods as well as pertinent communications protocols to imbed and assess such technologies in a real electric power distribution system, specifically the Circuit of the Future (CoF) developed by Southern California Edison (SCE). By modeling the behavior and communication for the components of a MAS, the operation and control of the power distribution circuit have been enhanced. The use of MAS to model and integrate a power distribution circuit offers a significantly different approach to the design of next generation power systems. For example, ways to control a power distribution circuit that includes a micro-grid while considering the impacts of thermal constraints, and integrating voltage control and renewable energy sources on the main power system have been pursued. Both computer simulations and laboratory testbeds have been used to demonstrate such technologies in electric power distribution systems. An economic assessment of MAS in electric power systems was also performed during this project. A report on the economic feasibility of MAS for electric power systems was prepared, and particularly discusses the feasibility of incorporating MAS in transmission and distribution (T&D) systems. Also, the commercial viability of deploying MAS in T&D systems has been assessed by developing an initial case study using utility input to estimate the benefits of deploying MAS. In summary, the MAS approach, which had previously been investigated with good success by APERC for naval shipboard applications, has now been applied with promising results for enhancing an electric power distribution circuit, such as the Circuit of the Future developed by Southern California Edison. The results for next generation power systems include better ability to reconfigure circuits, improve protection and enhance reliability.

None

2010-02-28T23:59:59.000Z

304

Reactor control rod timing system. [LMFBR  

DOE Patents (OSTI)

A fluid driven jet-edge whistle timing system is described for control rods of a nuclear reactor for producing real-time detection of the timing of each control rod in its scram operation. An important parameter in reactor safety, particularly for liquid metal fast breeder reactors (LMFBR), is the time deviation between the time the control rod is released and the time the rod actually reaches the down position. The whistle has a nearly pure tone signal with center frequency (above 100 kHz) far above the frequency band in which the energy of the background noise is concentrated. Each control rod can be fitted with a whistle with a different frequency so that there is no ambiguity in differentiating the signal from each control rod.

Wu, P.T.K.

1980-03-18T23:59:59.000Z

305

Variable temperature seat climate control system  

DOE Patents (OSTI)

A temperature climate control system comprises a variable temperature seat, at least one heat pump, at least one heat pump temperature sensor, and a controller. Each heat pump comprises a number of Peltier thermoelectric modules for temperature conditioning the air in a main heat exchanger and a main exchanger fan for passing the conditioned air from the main exchanger to the variable temperature seat. The Peltier modules and each main fan may be manually adjusted via a control switch or a control signal. Additionally, the temperature climate control system may comprise a number of additional temperature sensors to monitor the temperature of the ambient air surrounding the occupant as well as the temperature of the conditioned air directed to the occupant. The controller is configured to automatically regulate the operation of the Peltier modules and/or each main fan according to a temperature climate control logic designed both to maximize occupant comfort during normal operation, and minimize possible equipment damage, occupant discomfort, or occupant injury in the event of a heat pump malfunction.

Karunasiri, Tissa R. (Van Nuys, CA); Gallup, David F. (Pasadena, CA); Noles, David R. (Glendale, CA); Gregory, Christian T. (Alhambra, CA)

1997-05-06T23:59:59.000Z

306

Secure and Efficient Routable Control Systems  

SciTech Connect

This document provides the methods to secure routable control system communication in the electric sector. The approach of this document yields a long-term vision for a future of secure communication, while also providing near term steps and a roadmap. The requirements for the future secure control system environment were spelled out to provide a final target. Additionally a survey and evaluation of current protocols was used to determine if any existing technology could achieve this goal. In the end a four-step path was described that brought about increasing requirement completion and culminates in the realization of the long term vision.

Edgar, Thomas W.; Hadley, Mark D.; Manz, David O.; Winn, Jennifer D.

2010-05-01T23:59:59.000Z

307

Self-organizing fuzzy control of active suspension systems  

Science Conference Proceedings (OSTI)

A self-organizing fuzzy controller (SOFC) is proposed to control an active suspension system and evaluate its control performance. In complicated nonlinear system control, the SOFC continually updates the learning strategy in the form of fuzzy rules ...

Ruey-Jing Lian; Bai-Fu Lin; Wun-Tong Sie

2005-02-01T23:59:59.000Z

308

A robust fault-tolerant control strategy for networked control systems  

Science Conference Proceedings (OSTI)

Networked control systems (NCS) are one type of distributed control systems where serial communication networks is used to exchange system information and control signals between various physical components of the systems that may be physically distributed. ... Keywords: Deadbands, Networked control systems (NCS), Random time delays, Robust fault-tolerant control, T-S fuzzy modeling

Huo Zhihong; Zheng Yuan; Xu Chang

2011-03-01T23:59:59.000Z

309

Protecting Accelerator Control Systems in the Face of Sophisticated Cyber Attacks  

SciTech Connect

Cyber security for industrial control systems has received significant attention in the past two years. The news coverage of the Stuxnet attack, believed to be targeted at the control system for a uranium enrichment plant, brought the issue to the attention of news media and policy makers. This has led to increased scrutiny of control systems for critical infrastructure such as power generation and distribution, and industrial systems such as chemical plants and petroleum refineries. The past two years have also seen targeted network attacks aimed at corporate and government entities including US Department of Energy National Laboratories. Both of these developments have potential repercussions for the control systems of particle accelerators. The need to balance risks from potential attacks with the operational needs of an accelerator present a unique challenge for the system architecture and access model.

Hartman, Steven M [ORNL

2012-01-01T23:59:59.000Z

310

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

311

A HIGH PERFORMANCE/LOW COST ACCELERATOR CONTROL SYSTEM  

E-Print Network (OSTI)

LOW COST ACCELERATOR CONTROL SYSTEM S. Hagyary, J. Glat£» H.LOW COST ACCELERATOR CONTROL SYSTEM S. Magyary, J. Glatz, H.a high performance computer control system tailored to the

Magyary, S.

2010-01-01T23:59:59.000Z

312

A VERY HIGH LEVEL NEUTRAL BEAM CONTROL SYSTEM  

E-Print Network (OSTI)

Level Neutial Beam Control System we have elucidated theseHigh Level Neutral Beam Control System 8!. References 1. V.High-Level Neutral-Beam Control System Victor Elischer Van

Elischer, V.

2010-01-01T23:59:59.000Z

313

Actor-oriented control system design: A responsible framework perspective  

E-Print Network (OSTI)

IEEE TRANSACTIONS ON CONTROL SYSTEMS TECHNOLOGY, VOL. 12,pen- dulum swinging-up control system is used as an example10.1109/TCST.2004.824310 control systems consist of discrete

Liu, J; Eker, J; Janneck, J W; Liu, X J; Lee, E A

2004-01-01T23:59:59.000Z

314

Preventing, Controlling and Mitigating Power System Separation  

Science Conference Proceedings (OSTI)

Large power system blackouts, although infrequent, may affect up to tens of millions of people and result in huge costs. A blackout is the result of a sequence of disturbances including initial events, consequent protective actions or additional failures, related vulnerability conditions, and accelerated cascading outages leading to the final blackout. Those disturbances may gradually weaken a power system's connections and result in growing angular oscillations between inter-connected control areas. If ...

2010-12-01T23:59:59.000Z

315

Chaos and Control in Nonlinear Bloch System  

E-Print Network (OSTI)

The dynamics of two nonlinear Bloch systems is studied from the viewpoint of bifur- cation and a particular parameter space has been explored for the stability analysis based on stability criterion. This enables the choice of the desired unstable periodic orbit from the numerous unstable ones present within the attractor through the pro- cess of closed return pairs. A generalized active control method have been discussed for two Bloch systems arising from di erent initial conditions.

B. Rakshit; P. Saha; A. Roy. Chowdhury

2005-01-03T23:59:59.000Z

316

Guide for Economic Evaluation of Flexible AC Transmission Systems (FACTS) in Open Access Environments  

Science Conference Proceedings (OSTI)

The onset of deregulation in the electric power industry may have a chilling effect on a utility's willingness to upgrade its power delivery system because of perceived economic or environmental risks. This report provides a guide for utilities when undertaking evaluation and planning for the use of Flexible AC Transmission System (FACTS) technology as cost-effective devices for power delivery system enhancements.

1997-08-27T23:59:59.000Z

317

Cognitive Multiple Access Network with Outage Margin in the Primary System  

E-Print Network (OSTI)

This paper investigates the problem of spectrally efficient operation of a multiuser uplink cognitive radio system in the presence of a single primary link. The secondary system applies opportunistic interference cancelation (OIC) and decode the primary signal when such an opportunity is created. We derive the achievable rate in the secondary system when OIC is used. This scheme has a practical significance, since it enables rate adaptation without requiring any action from the primary system. The \\emph{exact} expressions for outage probability of the primary user are derived, when the primary system is exposed to interference from secondary users. Moreover, approximated formulas and tight lower and upper bounds for the ergodic sum-rate capacity of the secondary network are found. Next, the power allocation is investigated in the secondary system for maximizing the sum-rate under an outage constraint at the primary system. We formulate the power optimization problem in various scenarios depending on the avail...

Maham, Behrouz; Zhou, Xiangyun; Hjørungnes, Are

2011-01-01T23:59:59.000Z

318

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

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

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...

319

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

320

Variable emissivity laser thermal control system  

DOE Patents (OSTI)

A laser thermal control system for a metal vapor laser maintains the wall temperature 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. 8 figs.

Milner, J.R.

1994-10-25T23:59:59.000Z

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.


321

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 the torque commands applied to the motor. 5 figs.

Slicker, J.M.; Sereshteh, A.

1988-08-30T23:59:59.000Z

322

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

323

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

324

Assessing the Control Systems Capacity for Demand Response in...  

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

the Control Systems Capacity for Demand Response in California Industries Title Assessing the Control Systems Capacity for Demand Response in California Industries Publication Type...

325

Intelligent Building Energy Information and Control Systems for...  

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

Building Energy Information and Control Systems for Low-Energy Operations and Optimal Demand Response Title Intelligent Building Energy Information and Control Systems for...

326

Vehicle Technologies Office: Thermal Control and System Integration  

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

Thermal Control and System Integration to someone by E-mail Share Vehicle Technologies Office: Thermal Control and System Integration on Facebook Tweet about Vehicle Technologies...

327

Impacts of IPv6 on Infrastructure Control Systems | Department...  

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

Control Systems This document presents information on the impacts of adopting Internet Protocol version 6 (IPv6) into infrastructure control systems. The investigation was...

328

"Supervisory Control and Data Acquisition (SCADA) Systems." The...  

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

"Supervisory Control and Data Acquisition (SCADA) Systems." The CIP Report. Vol 7 No 8 "Supervisory Control and Data Acquisition (SCADA) Systems." The CIP Report. Vol 7 No 8...

329

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

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

SCADA Test Bed Enhancing control systems security in the energy sector National SCADA Test Bed Enhancing control systems security in the energy sector Improving the security of...

330

Security Framework for Control System Data Classification and...  

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

Framework for Control System Data Classification and Protection Security Framework for Control System Data Classification and Protection This document presents a data...

331

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

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

A Summary of Control System Security Standards Activities in the Energy Sector (October 2005) A Summary of Control System Security Standards Activities in the Energy Sector...

332

Load Control for System Reliability and Measurement-Based Stability...  

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

Load Control for System Reliability and Measurement-Based Stability Assessment Load Control for System Reliability and Measurement-Based Stability Assessment Research and develop...

333

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 Reliability Cyber Effects Analysis Using VCSE Promoting Control System Reliability This report describes the Virtual...

334

Optimal Nodal Control of Networked Hyperbolic Systems: Evaluation ...  

E-Print Network (OSTI)

Nov 4, 2004 ... At the nodes, the system is governed by algebraic node conditions. The system is controlled at the nodes of the graph. Optimal control ...

335

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...

336

Window signalling systems: control strategies and occupant behaviour  

E-Print Network (OSTI)

Occupant response to window control signaling systems (CBEDaly, A. (2002). Operable windows and HVAC systems. HPACK. (2008). The use of windows as controls for indoor

Ackerly, Katie; Brager, Gail

2013-01-01T23:59:59.000Z

337

Energy Mgmt. Systems/Building Controls | Open Energy Information  

Open Energy Info (EERE)

Energy Mgmt. SystemsBuilding Controls Incentives Retrieved from "http:en.openei.orgwindex.php?titleEnergyMgmt.SystemsBuildingControls&oldid267162" Category: Articles...

338

Computer-controlled radiation monitoring system  

Science Conference Proceedings (OSTI)

A computer-controlled radiation monitoring system was designed and installed at the Lawrence Livermore National Laboratory`s Multiuser Tandem Laboratory (10 MV tandem accelerator from High Voltage Engineering Corporation). The system continuously monitors the photon and neutron radiation environment associated with the facility and automatically suspends accelerator operation if preset radiation levels are exceeded. The system has proved reliable real-time radiation monitoring over the past five years, and has been a valuable tool for maintaining personnel exposure as low as reasonably achievable.

Homann, S.G.

1994-09-27T23:59:59.000Z

339

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

340

Analysis and control of distributed cooperative systems.  

Science Conference Proceedings (OSTI)

As part of DARPA Information Processing Technology Office (IPTO) Software for Distributed Robotics (SDR) Program, Sandia National Laboratories has developed analysis and control software for coordinating tens to thousands of autonomous cooperative robotic agents (primarily unmanned ground vehicles) performing military operations such as reconnaissance, surveillance and target acquisition; countermine and explosive ordnance disposal; force protection and physical security; and logistics support. Due to the nature of these applications, the control techniques must be distributed, and they must not rely on high bandwidth communication between agents. At the same time, a single soldier must easily direct these large-scale systems. Finally, the control techniques must be provably convergent so as not to cause undo harm to civilians. In this project, provably convergent, moderate communication bandwidth, distributed control algorithms have been developed that can be regulated by a single soldier. We have simulated in great detail the control of low numbers of vehicles (up to 20) navigating throughout a building, and we have simulated in lesser detail the control of larger numbers of vehicles (up to 1000) trying to locate several targets in a large outdoor facility. Finally, we have experimentally validated the resulting control algorithms on smaller numbers of autonomous vehicles.

Feddema, John Todd; Parker, Eric Paul; Wagner, John S.; Schoenwald, David Alan

2004-09-01T23:59:59.000Z

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.


341

Advanced CIDI Emission Control System Development  

DOE Green Energy (OSTI)

Ford Motor Company, with ExxonMobil and FEV, participated in the Department of Energy's (DOE) Ultra-Clean Transportation Fuels Program with the goal to develop an innovative emission control system for light-duty diesel vehicles. The focus on diesel engine emissions was a direct result of the improved volumetric fuel economy (up to 50%) and lower CO2 emissions (up to 25%) over comparable gasoline engines shown in Europe. Selective Catalytic Reduction (SCR) with aqueous urea as the NOx reductant and a Catalyzed Diesel Particulate Filter (CDPF) were chosen as the primary emission control system components. The program expected to demonstrate more than 90% durable reduction in particulate matter (PM) and NOx emissions on a light-duty truck application, based on the FTP-75 drive cycle. Very low sulfur diesel fuel (<15 ppm-wt) enabled lower PM emissions, reduced fuel economy penalty due to the emission control system and improved long-term system durability. Significant progress was made toward a durable system to meet Tier 2 Bin 5 emission standards on a 6000 lbs light-duty truck. A 40% reduction in engine-out NOx emissions was achieved with a mid-size prototype diesel engine through engine recalibration and increased exhaust gas recirculation. Use of a rapid warm-up strategy and urea SCR provided over 90% further NOx reduction while the CDPF reduced tailpipe PM to gasoline vehicle levels. Development work was conducted to separately improve urea SCR and CDPF system durability, as well as improved oxidation catalyst function. Exhaust gas NOx and ammonia sensors were also developed further. While the final emission control system did not meet Tier 2 Bin 5 NOx after 120k mi of aging on the dynamometer, it did meet the standards for HC, NMOG, and PM, and an improved SCR catalyst was shown to have potential to meet the NOx standard, assuming the DOC durability could be improved further. Models of DOC and SCR function were developed to guide the study of several key design factors for SCR systems and aid in the development of urea control strategy for maximum NOx reduction with minimum NH3 slip. A durable co-fueling system was successfully built and tested, with the help of service station nozzle and dispenser manufacturers, for simultaneous delivery of diesel fuel and aqueous urea to the vehicle. The business case for an aqueous urea infrastructure in the US for light-duty vehicles was explored.

Lambert, Christine

2006-05-31T23:59:59.000Z

342

Memory access scheduling and binding considering energy minimization in multi-bank memory systems  

Science Conference Proceedings (OSTI)

Memory-related activity is one of the major sources of energy consumption in embedded systems. Many types of memories used in embedded systems allow multiple operating modes (e.g., active, standby, nap, power-down) to facilitate energy saving. Furthermore, ... Keywords: binding, low energy design, scheduling

Chun-Gi Lyuh; Taewhan Kim

2004-06-01T23:59:59.000Z

343

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

Science Conference Proceedings (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

344

Seamless Access to Decentralized Storage Services in Computational Grids via a Virtual File System  

Science Conference Proceedings (OSTI)

This paper describes a novel technique for establishing a virtual file system that allows data to be transferred user-transparently and on-demand across computing and storage servers of a computational grid. Its implementation is based on extensions ... Keywords: computational grid, file system, logical account, network-computing, proxy

Renato J. Figueiredo; Nirav Kapadia; José A. B. Fortes

2004-04-01T23:59:59.000Z

345

A Grid Service-Based Infrastructure for Accessing Scientific Collections: The Case of the ARION System  

Science Conference Proceedings (OSTI)

The ARION system provides basic e-services of search and retrieval of objects in scientific collections, such as datasets, simulation models and tools necessary for statistical and/or visualization processing. These collections may represent application ... Keywords: Grid, RDF/S, Semantic Web, e-Science, mobile agents, ontologybased system, workflow

Catherine Houstis; Spyros Lalis; Marios Pitikakis; George V. Vasilakis; Kyriakos Kritikos; Antonis Smardas

2003-08-01T23:59:59.000Z

346

A monitor and control system for high voltage, gating, and triggering of a scintillating fiber active target  

SciTech Connect

A monitor and control system has been designed, constructed and tested at Notre Dame for the purpose of controlling all aspects of a Scintillating Fiber Acxtive Target system used in High Energy Physics Experimentation. The SFT Active Target system requires control of high voltages, gating, trigger counters, and monitoring. In addition, it resides in a radioactive area with very limited access. The control system uses a Leading Edge microcomputer, two specialized Z80-based processors, associated DACs, ADCs, discrete semiconductors, linear ICs and TTL and MECL logic. All of the hardware and software is custom-built; its design and performance is discussed.

Baumbaugh, B.; Bishop, J.; Gardner, R.W.; Mountain, R.J.; Ruchti, R.; Baumbaugh, A.; Knickerbocker, K.

1988-02-01T23:59:59.000Z

347

A monitor and control system for high voltage, gating, and triggering of a scintillating fiber active target  

SciTech Connect

A monitor and control system has been designed, constructed and tested at Notre Dame for the purpose of controlling all aspects of a Scintillating Fiber Active Target system used in High Energy Physics Experimentation. The SFT Active Target system requires control of high voltages, gating, trigger counters, and monitoring. In addition, it resides in a radioactive area with very limited access. The control system uses a Leading Edge microcomputer, two specialized Z80-based processors, associated DACs, ADCs, discrete semiconductors, linear ICs, and TTL and MECL logic. All of the hardware and software is custom-built; its design and performance is discussed. 5 refs., 4 figs.

Baumbaugh, B.; Bishop, J.; Gardner, R.W.; Mountain, R.J.; Ruchti, R.; Baumbaugh, A.; Knickerbocker, K.

1987-10-01T23:59:59.000Z

348

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

349

The Earth System Grid: Enabling Access to Multimodel Climate Simulation Data  

Science Conference Proceedings (OSTI)

By leveraging current technologies to manage distributed climate data in a unified virtual environment, the Earth System Grid (ESG) project is promoting data sharing between international research centers and diverse users. In transforming these ...

D. N. Williams; R. Drach; R. Ananthakrishnan; I. T. Foster; D. Fraser; F. Siebenlist; D. E. Bernholdt; M. Chen; J. Schwidder; S. Bharathi; A. L. Chervenak; R. Schuler; M. Su; D. Brown; L. Cinquini; P. Fox; J. Garcia; D. E. Middleton; W. G. Strand; N. Wilhelmi; S. Hankin; R. Schweitzer; P. Jones; A. Shoshani; A. Sim

2009-02-01T23:59:59.000Z

350

The Earth System Grid Federation: An open infrastructure for access to distributed geospatial data  

Science Conference Proceedings (OSTI)

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 ... Keywords: Peer to peer computing,Meteorology,Protocols,Software,Security,Servers,Indexes,CMIP5,Earth System Grid Federation (ESGF),peer-to-peer (P2P),Node,security,search,discovery,climate science

Sandro Fiore, Zed Pobre, Roland Schweitzer, Gavin M. Bell, Galen Shipman, Rachana Ananthakrishnan, Daniel Crichton, Sebastian Denvil, Mark Morgan, Feiyi Wang, Neill Miller, Estanislao Gonzalez, Luca Cinquini, Chris Mattmann, John Harney

2012-10-01T23:59:59.000Z

351

Energy Efficiency of Distributed Environmental Control Systems  

SciTech Connect

In this report, we present an analytical evaluation of the potential of occupant-regulated distributed environmental control systems (DECS) to enhance individual occupant thermal comfort in an office building with no increase, and possibly even a decrease in annual energy consumption. To this end we developed and applied several analytical models that allowed us to optimize comfort and energy consumption in partitioned office buildings equipped with either conventional central HVAC systems or occupant-regulated DECS. Our approach involved the following interrelated components: 1. Development of a simplified lumped-parameter thermal circuit model to compute the annual energy consumption. This was necessitated by the need to perform tens of thousands of optimization calculations involving different US climatic regions, and different occupant thermal preferences of a population of ~50 office occupants. Yearly transient simulations using TRNSYS, a time-dependent building energy modeling program, were run to determine the robustness of the simplified approach against time-dependent simulations. The simplified model predicts yearly energy consumption within approximately 0.6% of an equivalent transient simulation. Simulations of building energy usage were run for a wide variety of climatic regions and control scenarios, including traditional “one-size-fits-all” (OSFA) control; providing a uniform temperature to the entire building, and occupant-selected “have-it-your-way” (HIYW) control with a thermostat at each workstation. The thermal model shows that, un-optimized, DECS would lead to an increase in building energy consumption between 3-16% compared to the conventional approach depending on the climate regional and personal preferences of building occupants. Variations in building shape had little impact in the relative energy usage. 2. Development of a gradient-based optimization method to minimize energy consumption of DECS while keeping each occupant’s thermal dissatisfaction below a given threshold. The DECS energy usage was calculated using the simplified thermal model. OSFA control; providing a uniform temperature to the entire building, and occupant-selected HIYW control with a thermostat at each workstation were implemented for 3 cities representing 3 different climatic regions and control scenarios. It is shown that optimization allows DECS to deliver a higher level of individual and population thermal comfort while achieving annual energy savings between 14 and 26% compared to OSFA. The optimization model also allowed us to study the influence of the partitions’ thermal resistance and the variability of internal loads at each office. These influences didn’t make significant changes in the optimized energy consumption relative to OSFA. The results show that it is possible to provide thermal comfort for each occupant while saving energy compared to OSFA Furthermore, to simplify the implementation of this approach, a fuzzy logic system has been developed to generalize the overall optimization strategy. Its performance was almost as good as the gradient system. The fuzzy system provided thermal comfort to each occupant and saved energy compared to OSFA. The energy savings of the fuzzy system were not as high as for the gradient-optimized system, but the fuzzy system avoided complete connectivity, and the optimization did not have to be repeated for each population. 3. We employed a detailed CFD model of adjacent occupied cubicles to extend the thermal-circuit model in three significant ways: (a) relax the “office wall” requirement by allowing energy to flow between zones via advection as well as conduction, (b) improve the comfort model to account both for radiation as well as convection heat transfer, and (c) support ventilation systems in which the temperature is stratified, such as in underfloor air distribution systems. Initially, three-dimensional CFD simulations of several cubicle configurations, with an adjoining corridor, were performed both to understand the advection between cubicles and the

Khalifa, H. Ezzat; Isik, Can; Dannenhoffer, John F. III

2011-02-23T23:59:59.000Z

352

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

353

Control System of the Small Isochronous ring  

DOE Green Energy (OSTI)

The purpose of this paper is to describe the control system of the Small Isochronous Ring (SIR) developed and built at the National Superconducting Cyclotron Laboratory (NSCL) at Michigan State University (MSU). SIR is a small-scale experiment that simulates the dynamics of intense beams in large accelerators. A 20 to 30 keV hydrogen or deuterium ion bunch is injected in the ring, extracted after a variable number of turns and its longitudinal profile is studied. Information about the electronics used and software written to control different injection line, ring and extraction line elements is included. Some of these elements are magnets, electrostatic quadrupoles, electric and magnetic correctors, scanning wires, emittance measurement system, chopper and a fast Faraday cup.

Felix Marti; Eduard Pozdeyev

2004-07-01T23:59:59.000Z

354

Optimizing wind turbine control system parameters  

Science Conference Proceedings (OSTI)

The impending expiration of the levelized period in the Interim Standard Offer Number 4 (ISO4) utility contracts for purchasing wind-generated power in California mandates, more than ever, that windplants be operated in a cost-effective manner. Operating plans and approaches are needed that maximize the net revenue from wind parks--after accounting for operation and maintenance costs. This paper describes a design tool that makes it possible to tailor a control system of a wind turbine (WT) to maximize energy production while minimizing the financial consequences of fatigue damage to key structural components. Plans for code enhancements to include expert systems and fuzzy logic are discussed, and typical results are presented in which the code is applied to study the controls of a generic Danish 15-m horizontal axis wind turbine (HAWT).

Schluter, L.L. [Sandia National Labs., Albuquerque, NM (United States); Vachon, W.A. [Vachon (W.A.) and Associates, Inc., Manchester, MA (United States)

1993-08-01T23:59:59.000Z

355

APECS - The Atacama Pathfinder Experiment Control System  

E-Print Network (OSTI)

APECS is the distributed control system of the new Atacama Pathfinder EXperiment (APEX) telescope located on the Llano de Chajnantor at an altitude of 5107 m in the Atacama desert in northern Chile. APECS is based on Atacama Large Millimeter Array (ALMA) software and employs a modern, object-oriented design using the Common Object Request Broker Architecture (CORBA) as the middleware. New generic device interfaces simplify adding instruments to the control system. The Python based observer command scripting language allows using many existing software libraries and facilitates creating more complex observing modes. A new self-descriptive raw data format (Multi-Beam FITS or MBFITS) has been defined to store the multi-beam, multi-frequency data. APECS provides an online pipeline for initial calibration, observer feedback and a quick-look display. APECS is being used for regular science observations in local and remote mode since August 2005.

D. Muders; H. Hafok; F. Wyrowski; E. Polehampton; A. Belloche; C. Koenig; R. Schaaf; F. Schuller; J. Hatchell; F. v. d. Tak

2006-05-04T23:59:59.000Z

356

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?

357

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

358

Optimally Controlled Flexible Fuel Powertrain System  

DOE Green Energy (OSTI)

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

359

Steam turbine gland seal control system  

SciTech Connect

A high pressure steam turbine having a sealing gland where the turbine rotor penetrates the casing of the turbine. Under certain conditions the gland is sealed by an auxiliary steam supply, and under other conditions the gland is self sealed by turbine inlet steam. A control system is provided to modify the temperature of the auxiliary steam to be more compatible with the self sealing steam, so as to eliminate thermal shock to the turbine rotor.

Martin, H. F.

1985-09-17T23:59:59.000Z

360

Solar tracking control system Sun Chaser  

DOE Green Energy (OSTI)

The solar tracking control system (Sun Chaser) is believed to be an improved method of tracking the Sun in all types of weather conditions. The Sun Chaser will follow the Sun from east to west in clear or cloudy weather, and reset itself to the east position after sundown in readiness for the next sunrise. A description of the Sun Chaser hardware and its operation together with results is presented.

Scott, D.R.; White, P.R.

1979-04-01T23:59:59.000Z

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.


361

Solar Tracking Control System Sun Chaser  

DOE Green Energy (OSTI)

The solar tracking control system (''Sun Chaser'') is believed to be an improved method of tracking the Sun in all types of weather conditions. The Sun Chaser will follow the Sun from east to west in clear or cloudy weather, and reset itself to the east position after sundown in readiness for the next sunrise. A description of the Sun Chaser hardware and its operation together with results is presented.

Scott, D.R.; White, P.R.

1978-08-01T23:59:59.000Z

362

Distributed Control System Log-Keeping Specification  

Science Conference Proceedings (OSTI)

Information generated within the distributed control system (DCS) at most fossil generating stations could be more fully used by converting relevant information into searchable operator logs. This can be done through automated techniques combined with operator oversight and review. As a result, operator log-keeping effectiveness can be greatly improved while reducing the burden on the operator.ObjectivesThis project was undertaken to create specifications for ...

2012-12-12T23:59:59.000Z

363

Increasing Community Access to Solar: Designing and Developing a Shared Solar Photovoltaic System (Fact Sheet)  

DOE Green Energy (OSTI)

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

364

Predictive control of supply temperature in district heating systems  

E-Print Network (OSTI)

Predictive control of supply temperature in district heating systems Torben Skov Nielsen Henrik This report considers a new concept for controlling the supply temperature in district heating systems using stochastic modelling, prediction and control. A district heating systems is a di#30;cult system to control

365

Stabilizing low complexity feedback control of constrained piecewise affine systems  

Science Conference Proceedings (OSTI)

Piecewise affine (PWA) systems are powerful models for describing both non-linear and hybrid systems. One of the key problems in controlling these systems is the inherent computational complexity of controller synthesis and analysis, especially if constraints ... Keywords: Model predictive control, Multi-parametric programming, Optimal control, Piecewise affine system

Pascal Grieder; Michal Kvasnica; Mato Baoti?; Manfred Morari

2005-10-01T23:59:59.000Z

366

A large distributed control system using Ada in fusion research  

Science Conference Proceedings (OSTI)

Keywords: CORBA, application frameworks, distributed control system, levels of abstraction, object-oriented development

John P. Woodruff; Paul J. Van Arsdall

1998-11-01T23:59:59.000Z

367

Recommended Practice for Patch Management of Control Systems  

Science Conference Proceedings (OSTI)

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

368

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

369

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

370

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. 16 figs.

Konrad, A.M.

1996-08-06T23:59:59.000Z

371

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. 16 figs.

Konrad, A.M.

1997-12-09T23:59:59.000Z

372

A Combined Adaptive Law for Fuzzy Iterative Learning Control of Nonlinear Systems With Varying Control Tasks  

Science Conference Proceedings (OSTI)

To deal with the iterative control of uncertain nonlinear systems with varying control tasks, nonzero initial resetting state errors, and nonrepeatable mismatched input disturbance, a new adaptive fuzzy iterative learning controller is proposed in this ... Keywords: Adaptive control, fuzzy system, iterative learning control (ILC), nonlinear systems

Chiang-Ju Chien

2008-02-01T23:59:59.000Z

373

Project W-058 monitor and control system logic  

Science Conference Proceedings (OSTI)

This supporting document contains the printout of the control logic for the Project W-058 Monitor and Control System, as developed by Programmable Control Services, Inc. The logic is arranged in five appendices, one for each programmable logic controller console.

ROBERTS, J.B.

1999-05-12T23:59:59.000Z

374

Applying and analyzing robust modern control on uncertain hydraulic systems .  

E-Print Network (OSTI)

??In this work modern robust control systems are designed and compared to standard techniques for a hydraulic implement system. The system includes an independent metering… (more)

Bax, Brian

2006-01-01T23:59:59.000Z

375

CONTROL SYSTEM FOR SOLAR HEATING and COOLING  

E-Print Network (OSTI)

the use of heat Heat exchangers between the collectors andlocated access hole. The heat exchanger for the domestic hotmains is preheated by a heat exchanger immersed in the main

Dols, C.

2010-01-01T23:59:59.000Z

376

Design of novel hybrid controller for automatic generation control of hydrothermal system under open market scenario  

Science Conference Proceedings (OSTI)

This paper presents the analysis of Automatic generation control (AGC) of a two-area hydrothermal system under open market scenario by considering a novel hybrid controller which combines the principles of variable structure controller (VSC) and conventional ... Keywords: AGC, VSC, deregulated system, hybrid controller, hydrothermal system, open market system

C. Srinivasa Rao; S. Siva Nagaraju; P. Sangameswara Raju

2009-12-01T23:59:59.000Z

377

Design of decentralized multivariable excitation controllers in multimachine power systems by projective controls  

Science Conference Proceedings (OSTI)

A methodology for the design of decentralized multivariable excitation and controllers in multimachine power systems is developed using projective controls. The existing methodology, is extended to permit the coordinated design of AVR and PSS controllers in power systems.

Arnautovic, D.; Medanic, J.

1987-12-01T23:59:59.000Z

378

Direct Digital Control for Building HVAC Systems, 2nd edition  

Science Conference Proceedings (OSTI)

From the Publisher:Direct Digital Control for Building HVAC Systems, Second Edition, is thoroughly updated and expanded to include complete coverage of the architecture of modern digital control systems, distributed intelligence networked systems, communication ...

Michael J. L. Coffin

1998-06-01T23:59:59.000Z

379

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

380

Application of Phasor Measurement Units for Controlled System Separation  

Science Conference Proceedings (OSTI)

Controlled system separation is considered the final line of defense to save a power transmission system against a catastrophic blackout under severe disturbances8212for example, cascading failures. In a controlled manner, the system is separated into sustainable electrical islands, which can be resynchronized later to restore the system. This technical report gives an overview of controlled system separation and then proposes a practical controlled system separation scheme utilizing phasor measurement u...

2009-11-25T23:59:59.000Z

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.


381

Rethinking RFID: awareness and control for interaction with RFID systems  

Science Conference Proceedings (OSTI)

People now routinely carry radio frequency identification (RFID) tags - in passports, driver's licenses, credit cards, and other identifying cards - from which nearby RFID readers can access privacy-sensitive information. The problem is that people are ... Keywords: awareness, control, feedback, privacy, rfid, sensors

Nicolai Marquardt; Alex S. Taylor; Nicolas Villar; Saul Greenberg

2010-04-01T23:59:59.000Z

382

Switched Control of Electron Nuclear Spin Systems  

E-Print Network (OSTI)

In this article, we study control of electron-nuclear spin dynamics at magnetic field strengths where the Larmor frequency of the nucleus is comparable to the hyperfine coupling strength. The quantization axis for the nuclear spin differs from the static B_0 field direction and depends on the state of the electron spin. The quantization axis can be switched by flipping the state of electron spin, allowing for universal control on nuclear spin states. We show that by performing a sequence of flips (each followed by a suitable delay), we can perform any desired rotation on the nuclear spins, which can also be conditioned on the state of the electron spin. These operations, combined with electron spin rotations can be used to synthesize any unitary transformation on the coupled electron-nuclear spin system. We discuss how these methods can be used for design of experiments for transfer of polarization from the electron to the nuclear spins.

Navin Khaneja

2007-07-11T23:59:59.000Z

383

High Precision Control of Indirect Drive Systems Based on End-effector Sensor Information  

E-Print Network (OSTI)

Block diagram of the closed-loop control system . . . . .the control system . . . . . . . . . . . . . . . . . . Blockof the proposed speed control system . . . . . . . . .

Han, Cheng-Huei

2009-01-01T23:59:59.000Z

384

Poincaré-based control of delayed measured systems: Limitations and Improved Control  

E-Print Network (OSTI)

When a chaotic system is to be stabilized to a unstable orbit, delayed measurement of the system limits the applicability of chaos control techniqes. These limitations are analyzed and control schemes as linear predictive logging control (LPLC) and memory difference control (MDC) are introduced which can overcome those limitations for chaos control schemes that act in the Poincar\\'{e} section as Ott-Grebogi-Yorke (OGY) control and Bielawski-Derozier_Glorieux control (difference control).

Jens Christian Claussen

2007-12-27T23:59:59.000Z

385

Brief Analysis of dual-rate inferential control systems  

Science Conference Proceedings (OSTI)

For a dual-rate control system where the output sampling interval is an integer multiple of the control interval, we propose a model-based inferential control scheme which uses a fast-rate model to estimate the intersample outputs and then supply them ... Keywords: Digital control, Inferential control, Multirate systems, Robustness, Stability

Dongguang Li; Sirish L. Shah; Tongwen Chen

2002-06-01T23:59:59.000Z

386

From model-based strategies to intelligent control systems  

Science Conference Proceedings (OSTI)

This paper presents the evolution of control systems and trends in the field of integrated computer, communication and cognitive sciences for control applications. There have been selected and presented the most efficient control strategies used in complex ... Keywords: intelligent control systems, model-based systems

Ioan Dumitrache

2008-06-01T23:59:59.000Z

387

Brief paper: A power system nonlinear adaptive decentralized controller design  

Science Conference Proceedings (OSTI)

In this paper, a novel excitation control is designed for improvement of transient stability of power systems. The control algorithm is based on the adaptive backstepping method in a recursive way without linearizing the system model. Lyapunov function ... Keywords: Adaptive control, Backstepping design, Nonlinear decentralized control, Power systems, Transient stability

Rui Yan; ZhaoYang Dong; T. K. Saha; Rajat Majumder

2010-02-01T23:59:59.000Z

388

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

389

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

390

Security Implications of OPC, OLE, DCOM, and RPC in Control Systems  

SciTech Connect

OPC is a collection of software programming standards and interfaces used in the process control industry. It is intended to provide open connectivity and vendor equipment interoperability. The use of OPC technology simplifies the development of control systems that integrate components from multiple vendors and support multiple control protocols. OPC-compliant products are available from most control system vendors, and are widely used in the process control industry. OPC was originally known as OLE for Process Control; the first standards for OPC were based on underlying services in the Microsoft Windows computing environment. These underlying services (OLE [Object Linking and Embedding], DCOM [Distributed Component Object Model], and RPC [Remote Procedure Call]) have been the source of many severe security vulnerabilities. It is not feasible to automatically apply vendor patches and service packs to mitigate these vulnerabilities in a control systems environment. Control systems using the original OPC data access technology can thus inherit the vulnerabilities associated with these services. Current OPC standardization efforts are moving away from the original focus on Microsoft protocols, with a distinct trend toward web-based protocols that are independent of any particular operating system. However, the installed base of OPC equipment consists mainly of legacy implementations of the OLE for Process Control protocols.

2006-01-01T23:59:59.000Z

391

Analysis of Control Interactions on FACTS-Assisted Power Systems  

Science Conference Proceedings (OSTI)

This report presents results of comprehensive analyses of the dynamic behavior for power systems controlled by multiple Flexible AC Transmission System (FACTS) Controllers. Using a representative "benchmark" power system throughout the analyses and studies, an approach identifying the most effective FACTS Controllers, location, type, and ratings was developed. The control and coordination among the implemented FACTS Controllers in the studied power system were extensively investigated.

1998-02-24T23:59:59.000Z

392

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

393

Cliffside 6 integrated emissions control system  

Science Conference Proceedings (OSTI)

The article takes an inside look into the environmental hardware going into one of the highest profile coal-fired power plants projects in the US, a new 800 MW supercritical coal-fired facility at Cliffside, NC, Unit C6. This is currently under construction and scheduled to be in commercial service in 2012. To evaluate the alternative air quality control system (AQCS) options, Duke Energy established a cross-functional team and used a decision analysis process to select the 'best balanced choice'. Alstom's integrated AQCS which combines dry and wet flue gas desulfurization systems was the best balanced choice. Replacing an ESP with a spray dryer absorber achieved major cost savings and eliminated the need for wastewater treatment. 1 ref., 2 photos.

McGinnis, D.G.; Rader, P.C.; Gansley, R.R.; Wang, W. [Duke Energy, Charlotte, NC (United States)

2009-04-15T23:59:59.000Z

394

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

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

and direction for developing 'defense-in-depth' strategies for organizations that use control system networks while maintaining a multi-tier information architecture. Control...

395

CVG-venalum Potline Control and Supervisory Integrated System ...  

Science Conference Proceedings (OSTI)

To fulfill these targets, CVG-Venalum developed an aluminum reduction pot control and supervisory integrated system (VEN-PCSIS). The central control unit of ...

396

A Practical System for Centralized Network Control  

E-Print Network (OSTI)

Views and conclusions contained in this document are those of the authors and should not be interpreted as representing the official policies, either expressed or implied, of Microsoft, NSF, or the U.S. government. Keywords: Centralized Network Control, Clean-slate Network Design, Network Dissemination Plane, IP networking is a spectacular success, catalyzing the diffusion of data networking across academic institutions, governments, businesses, and homes worldwide. Yet, despite the fundamental importance of this infrastructure, today’s networks are surprisingly fragile and increasingly difficult to configure, control, and maintain. As our dependence on data networking grows, so do the risks of security breaches, large-scale outages, and service disruptions. We believe that the root of these problems lies in the complexity of the control and management planes— the software and protocols coordinating network elements—and particularly the way the decision logic and the distributed-systems issues are inexorably intertwined. The research community advocates a complete refactoring of the functionality and proposes a new architecture which they call “4D, ” after the architecture’s four planes: decision, dissemination, discovery, and data. The 4D architecture pulls decision-making logic out of the network elements to create a logically centralized decision plane, where network-level objectives and policies are specified and enforced by direct configuration of state on individual network elements.

Hong Yan; David Andersen; Srinivasan Seshan; David A. Maltz

2010-01-01T23:59:59.000Z

397

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

398

AMMONIA-FREE NOx CONTROL SYSTEM  

DOE Green Energy (OSTI)

This report describes a novel NOx control system that has the potential to drastically reduce cost, and enhance performance, operation and safety of power plant NOx control. The new system optimizes the burner and the furnace to achieve very low NOx levels and to provide an adequate amount of CO, and uses the CO for reducing NO both in-furnace and over a downstream AFSCR (ammonia-free selective catalytic reduction) reactor. The AF-SCR combines the advantages of the highly successful SCR technology for power plants and the TWC (three-way catalytic converter) widely used on automobiles. Like the SCR, it works in oxidizing environment of combustion flue gas and uses only base metal catalysts. Like the TWC, the AF-SCR removes NO and excess CO simultaneously without using any external reagent, such as ammonia. This new process has been studied in a development program jointed funded by the US Department of Energy and Foster Wheeler. The report outlines the experimental catalyst work performed on a bench-scale reactor, including test procedure, operating conditions, and results of various catalyst formulations. Several candidate catalysts, prepared with readily available transition metal oxides and common substrate materials, have shown over 80-90% removal for both NO and CO in oxidizing gas mixtures and at elevated temperatures. A detailed combustion study of a 400 MWe coal-fired boiler, applying computational fluid dynamics techniques to model boiler and burner design, has been carried out to investigate ways to optimize the combustion process for the lowest NOx formation and optimum CO/NO ratios. Results of this boiler and burner optimization work are reported. The paper further discusses catalyst scale-up considerations and the conceptual design of a 400 MWe size AF-SCR reactor, as well as economics analysis indicating large cost savings of the ammonia-free NOx control process over the current SCR technology.

Song Wu; Zhen Fan; Andrew H. Seltzer; Richard G. Herman

2006-06-01T23:59:59.000Z

399

Control And Data Acquisition System Of Tokamak KTM  

Science Conference Proceedings (OSTI)

The preliminary results of control and data acquisition system (CODAS) development for Kazakhstan tokamak for material testing (KTM) [1] are presented. The KTM CODAS is completely new system optimized for KTM facility and its regimes of operation. Its development is carrying out in Tomsk Polytechnic University by Russian specialists. The first KTM launching under the control of CODAS is planed on 2008 year. The base functionality of CODAS is presented, including short description of its subsystems, such as control system of conditioning process, plasma control system, digital control system of power supplies, protection and timing system, data acquisition system.

Baystrukov, K. I.; Pavlov, V. M.; Sharnin, A. V.; Obhodskij, A. V.; Merkulov, S. V.; Golobokov, Y. N.; Mezentsev, A. A.; Ovchinnikov, A. V. [Tomsk Polytechnic University, 634050, Lenin ave. 30 (Russian Federation); Tazhibaeva, I. L. [National Nuclear Center (Kazakhstan)

2008-04-07T23:59:59.000Z

400

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-efficient and coordinated system. Trends in the development of HVAC control strategies are briefly discussed. An example which differentiates between conventional and System Optimization approaches is used to illustrate this new approach. The example discusses aspects of cooling season operation for a typical HVAC system. The paper concludes with four basic principles of System Optimization which are essential for effective control of a building environment.

Thielman, D. E.

1984-01-01T23:59:59.000Z

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

Research on memory access vulnerability analysis technique in SCADA protocol implementation  

Science Conference Proceedings (OSTI)

SCADA systems play key roles in monitor and control of the critical infrastructures, the vulnerabilities existed in them may destroy the controlled critical infrastructures. This paper proposes an analysis method of memory access vulnerability in SCADA ... Keywords: SCADA protocol implementation, dynamic analysis, memory access vulnerability

Fang Lan; Wang Chunlei; He Ronghui

2010-07-01T23:59:59.000Z

402

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

DOE Green Energy (OSTI)

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

403

Dilution cycle control for an absorption refrigeration system  

DOE Patents (OSTI)

A dilution cycle control system for an absorption refrigeration system is disclosed. The control system includes a time delay relay for sensing shutdown of the absorption refrigeration system and for generating a control signal only after expiration of a preselected time period measured from the sensed shutdown of the absorption refrigeration system, during which the absorption refrigeration system is not restarted. A dilution cycle for the absorption refrigeration system is initiated in response to generation of a control signal by the time delay relay. This control system is particularly suitable for use with an absorption refrigeration system which is frequently cycled on and off since the time delay provided by the control system prevents needless dilution of the absorption refrigeration system when the system is turned off for only a short period of time and then is turned back on.

Reimann, Robert C. (Lafayette, NY)

1984-01-01T23:59:59.000Z

404

Innovative Lighting-Control and Demand-Response Systems  

Science Conference Proceedings (OSTI)

This EPRI technical update continues the technical assessment of modern lighting-control and demand-response (DR) systems in the following product areas: programmable timer switches, scalable lighting-control systems, Zigbee-based add-on control systems, and Z-Wave–based lighting controllers. This research helps to demonstrate that there is a wide variety of advanced lighting controls entering the marketplace each year, and it describes how they respond to a range of DR and power-quality ...

2013-12-12T23:59:59.000Z

405

Indirect quantum control for finite-dimensional coupled systems  

E-Print Network (OSTI)

We present a new analysis on the quantum control for a quantum system coupled to a quantum probe. This analysis is based on the coherent control for the quantum system and a hyperthesis that the probe can be prepared in specified initial states. The results show that a quantum system can be manipulated by probe state-dependent coherent control. In this sense, the present analysis provides a new control scheme which combines the coherent control and state preparation technology.

J. Nie; H. C. Fu; X. X. Yi

2008-05-01T23:59:59.000Z

406

Applied high resolution digital control for universal precision systems  

E-Print Network (OSTI)

This thesis describes the design and characterization of a high-resolution analog interface for dSPACE digital control systems and a high-resolution, high-speed data acquisition and control system. These designs are intended ...

Gawlik, Aaron John

2008-01-01T23:59:59.000Z

407

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.

408

Microprocessor controlled solar collector system. Technical progress report No. 3  

SciTech Connect

The strategy and initial results of a microprocessor control system for a solar water heating system are described. Two hot water storage tanks are utilized. (WHK)

1979-11-15T23:59:59.000Z

409

MAXIMUM ENERGY HARVESTING CONTROL FOROSCILLATING ENERGY HARVESTING SYSTEMS.  

E-Print Network (OSTI)

??This thesis presents an optimal method of designing and controlling an oscillating energy harvesting system. Many new and emerging energy harvesting systems, such as the… (more)

Elmes, John

2007-01-01T23:59:59.000Z

410

Modeling and construction of a computer controlled air conditioning system.  

E-Print Network (OSTI)

??As energy efficient devices become more necessary, it is desired to increase the efficiency of air conditioning systems. Current systems use on/off control, where the… (more)

Frink, Brandon S.

2007-01-01T23:59:59.000Z

411

Stabilizing a linear systems with saturation through optimal control  

E-Print Network (OSTI)

Dec 5, 2003 ... We construct a continuous feedback for a saturated system ?x(t) ... the saturated system, which is nonlinear, to an optimal control problem with ...

412

Control and regulation of modern distribution system, ForskEL...  

Open Energy Info (EERE)

and regulation of modern distribution system, ForskEL (Smart Grid Project) Jump to: navigation, search Project Name Control and regulation of modern distribution system, ForskEL...

413

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.

414

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

415

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

416

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.

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

1988-01-01T23:59:59.000Z

417

Power System Backup Control Center Requirements  

Science Conference Proceedings (OSTI)

The North American Electric Reliability Council (NERC) requested a reference document to aid control center managers in scoping, justifying, and planning backup control centers. This report serves as a guide for cost-effective implementation of a backup control center.

1994-04-01T23:59:59.000Z

418

Partial control of complex processing systems. Final Report  

Science Conference Proceedings (OSTI)

Research program for the design and control of advanced chemical process systems, typified by refineries/petro chemical plants.

Shinnar, Reuel; Rinard, Irv

2003-04-17T23:59:59.000Z

419

SYSTEMS AND METHODS FOR THE AUTONOMOUS CONTROL, AUTOMATED ...  

systems and methods for the autonomous control, automated guidance, and global coordination of moving process machinery united states patent application

420

Component configuration control system development at EBR-II  

SciTech Connect

One ofthe major programs being pursued by the EBR-II Division of Argonne National Laboratory is to improve the reliability of plant control and protection systems. This effort involves looking closely at the present state of the art and needs associated with plant diagnostic, control and protection systems. One of the areas of development at EBR-II involves a component configuration control system (CCCS). This system is a computerized control and planning aid for the nuclear power operator.

Monson, L.R.; Stratton, R.C.

1984-01-01T23:59:59.000Z

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.


421

Process control system using polarizing interferometer  

DOE Patents (OSTI)

A system for nondestructively 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. 38 figures.

Schultz, T.J.; Kotidis, P.A.; Woodroffe, J.A.; Rostler, P.S.

1994-02-15T23:59:59.000Z

422

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

423

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 is to supply enough steam to meet process demands. Steam conditions must remain as stable as possible, because variations in the steam system can affect downstream processes. Pressure variations in the steam supply header, for example, can have a severe effect on heat transferred to a process. If that process suffers an upset, unstable conditions can propagate from one process to another via the steam supply system. The closer the tolerance in the boiler control system, the smaller the steam header disturbances will be. This reduces the interaction, or 'coupling', of upsets between steam-consuming processes. Also, it may reduce the complexity of instrumentation needed for those processes. If the boiler control system can eliminate major upsets, the downstream processes won't need exotic schemes to compensate for such upsets.

Hockenbury, W. D.

1982-01-01T23:59:59.000Z

424

Hanford Borehole Geologic Information System (HBGIS) Updated User’s Guide for Web-based Data Access and Export  

Science Conference Proceedings (OSTI)

The Hanford Borehole Geologic Information System (HBGIS) is a prototype web-based graphical user interface (GUI) for viewing and downloading borehole geologic data. The HBGIS is being developed as part of the Remediation Decision Support function of the Soil and Groundwater Remediation Project, managed by Fluor Hanford, Inc., Richland, Washington. Recent efforts have focused on improving the functionality of the HBGIS website in order to allow more efficient access and exportation of available data in HBGIS. Users will benefit from enhancements such as a dynamic browsing, user-driven forms, and multi-select options for selecting borehole geologic data for export. The need for translating borehole geologic data into electronic form within the HBGIS continues to increase, and efforts to populate the database continue at an increasing rate. These new web-based tools should help the end user quickly visualize what data are available in HBGIS, select from among these data, and download the borehole geologic data into a consistent and reproducible tabular form. This revised user’s guide supersedes the previous user’s guide (PNNL-15362) for viewing and downloading data from HBGIS. It contains an updated data dictionary for tables and fields containing borehole geologic data as well as instructions for viewing and downloading borehole geologic data.

Mackley, Rob D.; Last, George V.; Allwardt, Craig H.

2008-09-24T23:59:59.000Z

425

On Cyber Security for Networked Control Systems  

E-Print Network (OSTI)

9.2.2 Security Interdependence . . . . . . Bounded Control7 Security Constrained Networked Control 7.1Inputs 9 Security Interdependencies for Networked 9.1

Amin, Saurabh

2011-01-01T23:59:59.000Z

426

Adaptive control of time delay systems and applications to automotive control problems  

E-Print Network (OSTI)

This thesis is about the adaptive control of time delay systems with applications to automotive control problems. The stabilization of systems involving time delays is a difficult problem since the existence of a delay may ...

Yildiz, Yildiray

2009-01-01T23:59:59.000Z

427

Adaptive fuzzy logic control of discrete-time dynamical systems  

Science Conference Proceedings (OSTI)

The objective of this paper is to achieve tracking control of a class of unknown nonlinear dynamical systems using a discrete-time fuzzy logic controller (FLC). Designing a discrete-time FLC is significant because almost all FLCs are implemented on digital ... Keywords: Adaptive control, Discrete-time control, Fuzzy approximation, Fuzzy logic, Universal fuzzy controller

S. Jagannathan; M. W. Vandegrift; F. L. Lewis

2000-02-01T23:59:59.000Z

428

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

429

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 hydraulic 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. 10 figs.

Cikanek, S.R.

1995-09-12T23:59:59.000Z

430

1140 IEEE COMMUNICATIONS LETTERS, VOL. 17, NO. 6, JUNE 2013 Jamming Energy Allocation in Training-Based Multiple Access Systems  

E-Print Network (OSTI)

Maham, Member, IEEE Abstract--We consider the problem of jamming attack in a multiple access channel). H. Pezeshki and B. Maham are with the School of Electrical and Com- puter Engineering, University

Zhou, Xiangyun "Sean"

431

From Design to Production Control Through the Integration of Engineering Data Management and Workflow Management Systems  

E-Print Network (OSTI)

At a time when many companies are under pressure to reduce "times-to-market" the management of product information from the early stages of design through assembly to manufacture and production has become increasingly important. Similarly in the construction of high energy physics devices the collection of ( often evolving) engineering data is central to the subsequent physics analysis. Traditionally in industry design engineers have employed Engineering Data Management Systems ( also called Product Data Management Systems) to coordinate and control access to documented versions of product designs. However, these systems provide control only at the collaborative design level and are seldom used beyond design. Workflow management systems, on the other hand, are employed in industry to coordinate and support the more complex and repeatable work processes of the production environment. Commer cial workflow products cannot support the highly dynamic activities found both in the design stages of product developmen...

Le Goff, J M; Bityukov, S; Estrella, F; Kovács, Z; Le Flour, T; Lieunard, S; McClatchey, R; Murray, S; Organtini, G; Vialle, J P; Bazan, A; Chevenier, G

1997-01-01T23:59:59.000Z

432

Primer Control System Cyber Security Framework and Technical Metrics  

Science Conference Proceedings (OSTI)

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

433

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

434

Control of systems integrating logic, dynamics, and constraints  

Science Conference Proceedings (OSTI)

This paper proposes a framework for modeling and controlling systems described by interdependent physical laws, logic rules, and operating constraints, denoted as mixed logical dynamical (MLD) systems. These are described by linear dynamic equations ... Keywords: Binary logic systems, Boolean logic, Dynamic models, Hybrid systems, Mixed-integer programming, Optimization problems, Predictive control

Alberto Bemporad; Manfred Morari

1999-03-01T23:59:59.000Z

435

Optimizing a Mobile Robot Control System using GPU Acceleration  

E-Print Network (OSTI)

Optimizing a Mobile Robot Control System using GPU Acceleration Nat Tuck, Michael Mc (IGVC) by running computationally intensive portions of the system on a commodity graphics processing competition our Robot Operating System (ROS) based control system would not run comfortably on the multicore

436

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"

437

Integrated Control of Active and Reactive Power Flow Controllers to Optimize Transmission System Utilization  

Science Conference Proceedings (OSTI)

Optimized power system control requires oversight of numerous control elements to efficiently and reliably transfer power across the system. The objective of this project was to minimize losses in the Consolidated Edison Electric power system via modification of control variables available to the system operator. These variables include generator voltages, transformer voltage/phase angle tap set points, and switched shunt status. System constraints include bus voltages, branch/interface flow limits, ...

2012-11-08T23:59:59.000Z

438

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

439

Indirect control with quantum accessor (I): coherent control of multi-level system via qubit chain  

E-Print Network (OSTI)

Indirect controllability of an arbitrary finite dimensional quantum system (N-dimensional qudit) through a quantum accessor is investigated. Here, The qudit is coupled to a quantum accessor which is modeled as a fully controllable spin chain with nearest neighbor (anisotropic) XY-coupling. The complete controllability of such indirect control system is investigated in detail. The general approach is applied to the indirect controllability of two and three dimensional quantum systems. For two and three dimensional systems, a simpler indirect control scheme is also presented.

H. C. Fu; Hui Dong; X. F. Liu; C. P. Sun

2006-10-23T23:59:59.000Z

440

Securing a Wireless Networked Control System Using Information Fusion  

Science Conference Proceedings (OSTI)

Security of a wireless sensor network practically governs its usability in several applications. Especially, in applications like Industrial control systems which use NCS and SCADA systems, the security affects the stability of the system. We propose ...

Brijesh Kashyap Chejerla, Sanjay Madria

2012-10-01T23:59:59.000Z

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

Event density analysis for event triggered control systems  

Science Conference Proceedings (OSTI)

In event triggered control systems, events occur aperiodically. For the real-time analysis of such systems, an appropriate approximation of the events' stimulation is necessary. Upper bounds have already been found for event triggered systems. For now, ...

Tobias Bund; Benjamin Menhorn; Frank Slomka

2013-03-01T23:59:59.000Z

442

CLIC-ACM: Acquisition and Control System  

E-Print Network (OSTI)

CLIC [1] (Compact Linear Collider) is a world-wide collaboration to study the next terascale lepton collider, relying upon a very innovative concept of two-beamacceleration. In this scheme, the power is transported to the main accelerating structures by a primary electron beam. The Two Beam Module (TBM) is a compact integration with a high filling factor of all components: RF, Magnets, Instrumentation, Vacuum, Alignment and Stabilization. This paper describes the very challenging aspects of designing the compact system to serve as a dedicated Acquisition & Control Module (ACM) for all signals of the TBM. Very delicate conditions must be considered, in particular radiation doses that could reach several kGy in the tunnel. In such severe conditions shielding and hardened electronics will have to be taken into consideration. In addition, with more than 300 ADC&DAC channels per ACM and about 21000 ACMs in total, it appears clearly that power consumption will be an important issue. It is also obvious that...

Bielawski, B; Magnoni, S

2013-01-01T23:59:59.000Z

443

Empowering the access to public procurement opportunities by means of linking controlled vocabularies. A case study of Product Scheme Classifications in the European e-Procurement sector  

Science Conference Proceedings (OSTI)

The present paper introduces a method to promote existing controlled vocabularies to the Linked Data initiative. A common data model and an enclosed conversion method for knowledge organization systems based on semantic web technologies and vocabularies ... Keywords: Expert systems, Linked open data, Product Scheme Classifications, Semantic web, e-Procurement

Jose María Alvarez-Rodríguez, José Emilio Labra-Gayo, Alejandro Rodríguez-González, Patricia Ordoñez De Pablos

2014-01-01T23:59:59.000Z

444

Microcomputer control for the superconducting magnetic energy storage system  

DOE Green Energy (OSTI)

The microcomputer-based, automatic control and data acquisition system for the Superconducting Magnetic Energy Storage system is described. A brief discussion of the function of SMES and identification of its major systems is followed by a detailed discussion of the control and data acquisition system. The distributed control and data acquisition architecture, interprocessor timing and communications, task scheduler, master-slave relationship, and man/machine interface are some of the topics discussed.

Seamons, M.J.; Criscuolo, A.L.

1981-01-01T23:59:59.000Z

445

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

446

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

447

Dynamic Reactive Power Control of Isolated Power Systems  

E-Print Network (OSTI)

This dissertation presents dynamic reactive power control of isolated power systems. Isolated systems include MicroGrids in islanded mode, shipboard power systems operating offshore, or any other power system operating in islanded mode intentionally or due to a fault. Isolated power systems experience fast transients due to lack of an infinite bus capable of dictating the voltage and frequency reference. This dissertation only focuses on reactive control of islanded MicroGrids and AC/DC shipboard power systems. The problem is tackled using a Model Predictive Control (MPC) method, which uses a simplified model of the system to predict the voltage behavior of the system in future. The MPC method minimizes the voltage deviation of the predicted bus voltage; therefore, it is inherently robust and stable. In other words, this method can easily predict the behavior of the system and take necessary control actions to avoid instability. Further, this method is capable of reaching a smooth voltage profile and rejecting possible disturbances in the system. The studied MicroGrids in this dissertation integrate intermittent distributed energy resources such as wind and solar generators. These non-dispatchable sources add to the uncertainty of the system and make voltage and reactive control more challenging. The model predictive controller uses the capability of these sources and coordinates them dynamically to achieve the voltage goals of the controller. The MPC controller is implemented online in a closed control loop, which means it is self-correcting with the feedback it receives from the system.

Falahi, Milad

2012-12-01T23:59:59.000Z

448

An Improved Sensorless Control System of Permanent Magnet Synchronous Motor  

Science Conference Proceedings (OSTI)

To improve the performance of permanent magnet synchronous motor sensor less control system, the phase offset caused by the low pass filter must be considering. In this paper, to apply the linear control theory to PMSM system. The introduced control ... Keywords: PMSM, Reduced-order Observer, Group Time Delay, Adaptive, Sensorless

Long Tang, Hong-Lin Ou Yang, Chao Meng, Xin-Yuan Li, Xu-Jie Mo

2013-01-01T23:59:59.000Z

449

Fuzzy Control of HVAC Systems Optimized by Genetic Algorithms  

Science Conference Proceedings (OSTI)

This paper presents the use of genetic algorithms to develop smartly tuned fuzzy logic controllers dedicated to the control of heating, ventilating and air conditioning systems concerning energy performance and indoor comfort requirements. This problem ... Keywords: HVAC systems, fuzzy logic controllers, genetic tuning, multiple criteria

Rafael Alcalá; Jose M. Benítez; Jorge Casillas; Oscar Cordón; Raúl Pérez

2003-03-01T23:59:59.000Z

450

Process control interface system for a distillation plant  

Science Conference Proceedings (OSTI)

This paper presents the development of a process control interface system (PCIS) for a distillation pilot plant that is based on the communication protocol called MODBUS. MODBUS communicates the computer (used as a control unit) with the process because ... Keywords: Communication protocol, Distillation column, Interface system, Process control

A. Téllez-Anguiano; F. Rivas-Cruz; C. -M. Astorga-Zaragoza; E. Alcorta-García; D. Juárez-Romero

2009-02-01T23:59:59.000Z

451

Green Scheduling: Scheduling of Control Systems for Peak Power Reduction  

E-Print Network (OSTI)

approaches for load shifting and model predictive control have been proposed, we present an alternative approach to reduce the peak power for a set of control systems. The proposed model is intuitive, scalableGreen Scheduling: Scheduling of Control Systems for Peak Power Reduction Truong Nghiem, Madhur Behl

Pappas, George J.

452

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

453

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

454

Reviewing the role of photosensors in lighting control systems  

Science Conference Proceedings (OSTI)

The application of innovative technologies of automatic control in lighting systems gains daily the interest of engineers, constructors and users. The main purpose of these applications is the energy savings. Daylight control is a form of automatic control ... Keywords: daylight, lighting controls, photosensor

L. Doulos; A. Tsangrassoulis; F. V. Topalis

2007-05-01T23:59:59.000Z

455

Data Access  

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

FTP: Daily Data and Monthly Data Web interface: This interface allows users to query, plot, and download data from individual stations. CDIAC developed this system using...

456

Occupant Response to Window Control Signaling Systems  

E-Print Network (OSTI)

Berkeley California 3. ZGF Architects Offices, Portland, ORtemperature control 12. NBBJ Architects Offices, Seattle WAare installed, client and architect often share the same 

Ackerly, Katherine

2012-01-01T23:59:59.000Z

457

Building Performance Monitoring, Control, and Information Systems  

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

are of critical importance in achieving optimal low-energy building performance. Advanced monitoring and control technologies with high energy saving potential are widely...

458

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

459

Observing industrial control system attacks launched via metasploit framework  

Science Conference Proceedings (OSTI)

Industrial Control Systems (ICS) are present across many industries ranging from automotive to utilities. These systems have been found to be connected to corporate enterprise servers and can communicate over unencrypted communication channels. Interconnections ... Keywords: SCADA, industrial control systems, intrusion detection

Nathan Wallace, Travis Atkison

2013-04-01T23:59:59.000Z

460

Attacks against process control systems: risk assessment, detection, and response  

Science Conference Proceedings (OSTI)

In the last years there has been an increasing interest in the security of process control and SCADA systems. Furthermore, recent computer attacks such as the Stuxnet worm, have shown there are parties with the motivation and resources to effectively ... Keywords: IDS, SCADA, control systems, critical infrastructure protection, cyber-physical systems, security

Alvaro A. Cárdenas; Saurabh Amin; Zong-Syun Lin; Yu-Lun Huang; Chi-Yen Huang; Shankar Sastry

2011-03-01T23:59:59.000Z

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.


461

Scalable Scheduling of Building Control Systems for Peak Demand Reduction  

E-Print Network (OSTI)

is model predictive control (MPC) ([6], [7]). In [6] the authors inves- tigated MPC for thermal energyScalable Scheduling of Building Control Systems for Peak Demand Reduction Truong X. Nghiem, Madhur operation of sub- systems such as heating, ventilating, air conditioning and refrigeration (HVAC&R) systems

Pappas, George J.

462

Control of Doubly-Fed Induction Generator System Using PIDNNs  

Science Conference Proceedings (OSTI)

An intelligent control stand-alone doubly-fed induction generator (DFIG) system using proportional-integral-derivative neural network (PIDNN) is proposed in this study. This system can be applied as a stand-alone power supply system or as the emergency ... Keywords: Doubly-fed induction generator, field-oriented control, proportional-integral-derivative neural network

Faa-Jeng Lin; Jonq-Chin Hwang; Kuang-Hsiung Tan; Zong-Han Lu; Yung-Ruei Chang

2010-12-01T23:59:59.000Z

463

Recursive controllability and observability tests for large dynamic systems  

Science Conference Proceedings (OSTI)

Controllability and observability criteria for a linear stationary system are used to design recursive tests for slackening the computing system requirements for verification of the controllability and observability of large systems. Practical examples ... Keywords: 02.30.Yy+64.70.+p

E. Yu. Zybin; M. Sh. Misrikhanov; V. N. Ryabchenko

2006-05-01T23:59:59.000Z

464

Hybrid Discrete and Continuous Control for Power Systems  

Science Conference Proceedings (OSTI)

The control of the electricity supply from generation to end-use has been an engineering and mathematical challenge for many decades. The continuous increase in power requirements, system interconnections and technological options prompted the search ... Keywords: electric systems, intelligent controls, power systems

W. H. Esselman; D. J. Sobajic; J. Maulbetsch

1999-11-01T23:59:59.000Z

465

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

466

Fuzzy expert system design for operating room air-condition control systems  

Science Conference Proceedings (OSTI)

In this study, a controlled fuzzy expert system (FES) was designed to provide the conditions necessary for operating rooms. For this purpose, existing operating rooms have been studied to see if there are more useful, reliable and comfortable ones. How ... Keywords: Adaptive fuzzy control, Expert systems, Fuzzy control systems, Operating room control

Nazmi Etik; Novruz Allahverdi; Ibrahim Unal Sert; Ismail Saritas

2009-08-01T23:59:59.000Z

467

The making of multimedia power systems control and simulation labware  

Science Conference Proceedings (OSTI)

This paper discusses the development of a multimedia, PC-based, hydro-electric power generation system simulator to interface, via real-time data acquisition and control, to programmable logic controllers. The project is ongoing. The paper discusses ...

J. B. Patton; P. Jayanetti

1996-08-01T23:59:59.000Z

468

Event-triggered control for multi-agent systems  

E-Print Network (OSTI)

Event-driven strategies for multi-agent systems are motivated by the future use of embedded microprocessors with limited resources that will gather information and actuate the individual agent controller updates. The control ...

Johansson, Karl H.

469

Neural Network Control of Robot Manipulators and Nonlinear Systems  

Science Conference Proceedings (OSTI)

From the Publisher:This graduate text provides an authoritative account of neural network (NN) controllers for robotics and nonlinear systems and gives the first textbook treatment of a general and streamlined design procedure for NN controllers. Stability ...

F. L. Lewis; A. Yesildirak; Suresh Jagannathan

1998-09-01T23:59:59.000Z

470

Cyber Security Testing and Training Programs for Industrial Control Systems  

DOE Green Energy (OSTI)

Service providers rely on industrial control systems (ICS) to manage the flow of water at dams, open breakers on power grids, control ventilation and cooling in nuclear power plants, and more. In today's interconnected environment, this can present a serious cyber security challenge. To combat this growing challenge, government, private industry, and academia are working together to reduce cyber risks. The Idaho National Laboratory (INL) is a key contributor to the Department of Energy National SCADA Test Bed (NSTB) and the Department of Homeland Security (DHS) Control Systems Security Program (CSSP), both of which focus on improving the overall security posture of ICS in the national critical infrastructure. In support of the NSTB, INL hosts a dedicated SCADA testing facility which consists of multiple control systems supplied by leading national and international manufacturers. Within the test bed, INL researchers systematically examine control system components and work to identify vulnerabilities. In support of the CSSP, INL develops and conducts training courses which are designed to increase awareness and defensive capabilities for IT/Control System professionals. These trainings vary from web-based cyber security trainings for control systems engineers to more advanced hands-on training that culminates with a Red Team/ Blue Team exercise that is conducted within an actual control systems environment. INL also provides staffing and operational support to the DHS Industrial Control Systems Cyber Emergency Response Team (ICS-CERT) Security Operations Center which responds to and analyzes control systems cyber incidents across the 18 US critical infrastructure sectors.

Daniel Noyes

2012-03-01T23:59:59.000Z

471

The Direct Neural Control Applied to the Position Control in Hydraulic Servo System  

Science Conference Proceedings (OSTI)

This study utilizes the direct neural control (DNC) based on back propagation neural networks (BPN) with specialized learning architecture applied to control the position of a cylinder rod in an electro-hydraulic servo system (EHSS). The proposed neural ... Keywords: Back propagation, Electro-hydraulic servo system, Neural networks, Position control

Yuan Kang; Yi-Wei Chen; Yeon-Pun Chang; Ming-Huei Chu

2008-09-01T23:59:59.000Z

472

Solar access of residential rooftops in four California cities  

E-Print Network (OSTI)

the solar access of rooftop solar-energy systems, includingthermal collection by rooftop solar-energy equipment. It canthe solar access of rooftop solar-energy systems, including

Levinson, Ronnen

2010-01-01T23:59:59.000Z

473

Manipulating quantum information on the controllable systems or subspaces  

E-Print Network (OSTI)

In this paper, we explore how to constructively manipulate quantum information on the controllable systems or subspaces. It is revealed that one can make full use of distinguished properties of Pauli operators to design control Hamiltonian based on the geometric parametrization of quantum states. It is demonstrated in this research that Bang-Bang controls, triangle-function controls and square-function control can be utilized to manipulate controllable qubits or encoded qubits on controllable subspace for both open quantum dynamical systems and uncontrollable closed quantum dynamical systems. Furthermore, we propose a new kind of time-energy performance index to trade-off time and energy resource cost, and comprehensively discuss how to design control magnitude to minimize a kind of time-energy performance. A comparison has been made among these three kind of optimal control. It is underlined in this research that the optimal time performance can be always expressed as J^{*} =\\lamda{\\cdot}t^{*}_{f} +E^{*} for...

Zhang, Ming

2010-01-01T23:59:59.000Z

474

Autonomous Control of Space Reactor Systems  

SciTech Connect

Autonomous and semi-autonomous control is a key element of space reactor design in order to meet the mission requirements of safety, reliability, survivability, and life expectancy. Interrestrial nuclear power plants, human operators are avilable to perform intelligent control functions that are necessary for both normal and abnormal operational conditions.

Belle R. Upadhyaya; K. Zhao; S.R.P. Perillo; Xiaojia Xu; M.G. Na

2007-11-30T23:59:59.000Z

475

Control of the socio-economic systems using herding interactions  

E-Print Network (OSTI)

Collective behavior of the complex socio-economic systems is heavily influenced by the herding, group, behavior of individuals. The importance of the herding behavior may enable the control of the collective behavior of the individuals. In this contribution we consider a simple agent-based herding model modified to include agents with controlled state. We show that in certain case even the smallest fixed number of the controlled agents might be enough to control the behavior of a very large system.

Kononovicius, Aleksejus

2013-01-01T23:59:59.000Z

476

Coordinated joint motion control system with position error correction  

DOE Patents (OSTI)

Disclosed are an articulated hydraulic machine supporting, control system and control method for same. The articulated hydraulic machine has an end effector for performing useful work. The control system is capable of controlling the end effector for automated movement along a preselected trajectory. The control system has a position error correction system to correct discrepancies between an actual end effector trajectory and a desired end effector trajectory. The correction system can employ one or more absolute position signals provided by one or more acceleration sensors supported by one or more movable machine elements. Good trajectory positioning and repeatability can be obtained. A two-joystick controller system is enabled, which can in some cases facilitate the operator's task and enhance their work quality and productivity.

Danko, George (Reno, NV)

2011-11-22T23:59:59.000Z

477

Coordinated joint motion control system with position error correction  

SciTech Connect

Disclosed are an articulated hydraulic machine supporting, control system and control method for same. The articulated hydraulic machine has an end effector for performing useful work. The control system is capable of controlling the end effector for automated movement along a preselected trajectory. The control system has a position error correction system to correct discrepancies between an actual end effector trajectory and a desired end effector trajectory. The correction system can employ one or more absolute position signals provided by one or more acceleration sensors supported by one or more movable machine elements. Good trajectory positioning and repeatability can be obtained. A two-joystick controller system is enabled, which can in some cases facilitate the operator's task and enhance their work quality and productivity.

Danko, George (Reno, NV)

2011-11-22T23:59:59.000Z

478

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

479

Computer Networks and ISDN Systems, February, 1999. Architectural Considerations in the design of WDM-based Optical Access  

E-Print Network (OSTI)

and coax infrastructure already exists, hybrid architectures that utilize the existing copper or coax have of communication networks has transformed the way we live and work. As we progress further into the information age. The access network refers #12;to the portion of the communication infrastructure responsible for reaching

Modiano, Eytan

480

A PrivileA Privilege Management And Enforcement System For Distributed RS  

Science Conference Proceedings (OSTI)

We propose a system which both allows for easy administration as well as enforcement of controlled access of resources to distributed users. In particular, we have developed management and access methods for end user access to distributed mass storage ...

KJ Maly; Gupta, A; Kvande, B; IB Levinstein; Mukkamala; al et

1996-04-01T23:59:59.000Z

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.


481

Nuclear Maintenance Applications Center: Emergency Diesel Generator Control Systems  

Science Conference Proceedings (OSTI)

Emergency diesel generators (EDGs) have been a subject of industry attention since the 1980s because of their importance to plant safety, and a key point of focus has been their control systems. To support long-term reliability and availability of EDG control systems, the Electric Power Research Institute (EPRI) has developed this report, which highlights maintenance tasks and strategies that can reduce failures of control system components. The report draws from the knowledge of industry EDG experts and...