Note: This page contains sample records for the topic kenkyu rabo system from Science.gov.
While these samples are representative of the content of Science.gov,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of Science.gov
to obtain the most current and comprehensive results.
Last update: August 15, 2014.
1

Teachers Learning from Each Other in Japan through Jugyou Kenkyu.  

ERIC Educational Resources Information Center

Many school-based inservice teacher training programs are available to Japanese teachers, including observing classes in other schools, inviting parents to observe and provide feedback, and conducting collaborative research on the teaching-learning process (Jugyou Kenkyu). This article highlights Jugyou Kenkyu, which is based on three steps…

Arani, Mohammad Reza Sarkar

2

Jukutatsu machine system no chosa kenkyu. Honpen. (Research on the proficient machine system. Main part).  

National Technical Information Service (NTIS)

Because the succession of techniques requiring proficient technologies is becoming difficult year by year, the proficient machine system was proposed. Most of such techniques are dependent on intuition or experience difficult to express numerically, and a...

1996-01-01

3

Kaku Nenryo Saishori Sochi Yosetsubu No Taishokusei Ni Kansuru Kenkyu (Corrosion Resistance at Welded Zones of Nuclear Fuel Reprocessing System).  

National Technical Information Service (NTIS)

Research was conducted to improve the corrosion resistance at welded zones of nuclear fuel recycling system made of austenitic stainless steel. The following results were obtained. Crystal granules as fine as those of the basic material were obtained at w...

H. Nakamura H. Irie T. Watanabe K. Ei S. Tsukamoto

1993-01-01

4

Learning from Japanese Approach to Teachers' Professional Development: Can "Jugyou Kenkyu" Work in Other Countries?  

ERIC Educational Resources Information Center

This paper tries to present a careful analysis of current trends and challenges to importing Japanese model of teachers' professional development. The objective is to examine what "we" can learn from Japanese approach to improving instruction, especially "Jugyou Kenkyu" (Lesson Study) as a collaborative research on the teaching-learning process.…

Masami, Matoba; Reza, Sarkar Arani M.

2005-01-01

5

Seitetsu Kenkyu, No. 319, 1985.  

National Technical Information Service (NTIS)

Contents: Nippon steel ironmaking control and data exchange system; Control model of continuous casting machine operation; HT60 Steels by direct quenching method; Prevention of abnormal growth of recrystallized ferrite grains in low-carbon steels wires; E...

1985-01-01

6

Kan'i sosagata denshi sekkei seisan shien system no kaihatsu ni kansuru kenkyu kyoryoku. (Research cooperation project on manufacturing technology supported by advanced and integrated information system through international cooperation (MATIC)).  

National Technical Information Service (NTIS)

To support the advancement of basic industries including machine industry in Asian countries, research cooperation has been conducted for developing the manufacturing technology supported by advanced and integrated information system suitable for actual c...

1997-01-01

7

Kan'i sosagata denshi sekkei seisan shien system no kaihatsu ni kansuru kenkyu kyoryoku. (Manufacturing technology supported by advanced and integrated information system through international cooperation in fiscal 1994).  

National Technical Information Service (NTIS)

Among NEDO's international research cooperation projects, the paper described Japan's cooperation with Asian countries in development of an easy-operated electronic design/production supporting system. The project aims to realize information realtime tech...

1995-01-01

8

Iryo fukushi kiki gijutsu kenkyu kaihatsu 1994 nendo seika hokokusho. Koreisha shogaishayo shokuji hanso jido robot system. (Report on fiscal 1994 results of the research and development of medical welfare equipment technology. Autonomous robot system for meal delivery for the aged/handicapped).  

National Technical Information Service (NTIS)

A conceptual design was made on an autonomous robot system for meal delivery for the aged and the handicapped. In the first prototype of a mobile device, improvement and manufacture were made based on the mobile section of the commercial mobile robot. For...

1995-01-01

9

Yonkyokushi Renzu to Sono Riyo Gijutsu Ni Kansuru Kenkyu ( Study on Electrostatic Quadrupole Lenses and Their Application Technologies).  

National Technical Information Service (NTIS)

A study was conducted to provide solutions to the problems which hinders the utilization of the quadrupole lens systems in place of the conventional round lenses. A new simplified lens capable of correcting third order aperture aberration is proposed. The...

S. Okayama

1993-01-01

10

Seitetsu Kenkyu, No. 325, 1987.  

National Technical Information Service (NTIS)

Special issue on ironmaking. Future prospect of ironmaking technology; Operation results of Kimitsu no. 4 blast furnace (1st campaign) - Pursuit of economy of blast furnace; Progress of blast furnace plant technology; Blast furnace burden distribution con...

1987-01-01

11

Chikyu kankyo taisaku gijutsu no kenkyu joho network chosa. (Research on the information network for R and D on the innovative technology for the earth).  

National Technical Information Service (NTIS)

With an objective to structure an information network system to promote research information exchange on global environment preserving technologies, the currently used RITE information system was reviewed, and the WWW home page was discussed. Three years ...

1996-01-01

12

1992 nendo Nihon Taiyo Energy Gakkai Nihon Furyoku Energy Kyokai godo kenkyu happyokai koen ronbunshu. (1992 JSES/JWEA Joint Conference).  

National Technical Information Service (NTIS)

The proceedings of the conference include the results of research and development of the photovoltaic power generation system, the wind power generation and biomass. As for the photovoltaic power generation system, reports are made on the following: power...

1992-01-01

13

Kankyo keisokuyo laser radar no kaihatsu ni kansuru kenkyu kyoryoku. (Research cooperation of the development of laser radar for environmental measurements).  

National Technical Information Service (NTIS)

Research and development of the laser radar for measuring the air pollution in urban areas and the environmental information network have been conducted through the cooperation with Indonesian researchers. A measurement system suitable to actual situation...

1997-01-01

14

1993 nendo shizen energy ni yoru chiiki okoshi no tame no engineering kenkyu. (Fiscal 1993 investigational research report on the trend of waste treatment and recycle in Europe).  

National Technical Information Service (NTIS)

The paper investigated the trend of waste treatment and recycle in EC countries. The waste problem is a problem not only of the technology, but of the social system. It is an important aspect that general citizens can join recycling activities independent...

1994-01-01

15

The Role of Community Studies in the Makiguchian Pedagogy  

ERIC Educational Resources Information Center

This article focuses on two of the earlier works in the Makiguchi corpus, "Kyoju no togo chushin toshiteno kyodoka kenkyu" ("Research into Community Studies as the Integrating Focus of Instruction," 1912/1987; hereafter "Community Studies"), and "Chiri kyoju no hoho oyobi naiyo no kenkyu" ("Research into the Methods and Content of Geography…

Gebert, Andrew

2009-01-01

16

Seitetsu Kenkyu, Number 313, May 1984.  

National Technical Information Service (NTIS)

Contents: Continuous Casting--Direct Rolling Process at Nippon Steel; Secondary Cooling Control Model for Continuous Casting--Direct Rolling Process; Techniques for High Speed Mold Width Changing and its Application to Continuous Casting--Direct Rolling P...

1984-01-01

17

Seitetsu Kenkyu, No. 314, July 1984.  

National Technical Information Service (NTIS)

Contents: Earthquake-Ductility Analysis for Offshore Structures; Steel Plates for Offshore Structures in the North Sea; Steel Plates for Ships and Offshore Structures in Ice Covered Waters; Study on Improvements in the Toughness of Heavy Welds for Critica...

1984-01-01

18

Apataitokei kagobutsu ni kansuru kenkyu. (Study on apatite compounds).  

National Technical Information Service (NTIS)

To clarify the material properties of apatite compounds, the synthesis method, and the evaluation of physical properties of material and elementary technology were investigated. For the study on synthesis and crystal growth, a method of precipitating calc...

1996-01-01

19

Supesu Tsurizumu Kenkyu Kotohajime (Start of Space Tourism).  

National Technical Information Service (NTIS)

Space tourism means commercialization of manned space flight. From the early stage of space development, space commercialization is a profound theme in multidisciplinary fields, on the basis of a principle that the outcomes of advanced technique developed...

M. Nagatomo

1993-01-01

20

Body Systems  

NSDL National Science Digital Library

What are the parts and functions of the different systems in the body? Circulatory System Watch the Circulatory System and the Heart video. Complete one of the Circulatory System quizzes. Excretory System Label the parts of the excretory system. Respiratory System Quiz Complete respiratory system quiz to review parts. Skeletal System Label each part of the skeletal system. Vocabulary Review Change the settings to only include body system terms and play Hangman to review new vocabulary. ...

2011-11-02

21

Solar system positioning system  

NASA Technical Reports Server (NTRS)

Power-rich spacecraft envisioned in Prometheus initiative open up possibilities for long-range high-rate communication. A constellation of spacecraft on orbits several A.U. from the Sun, equipped with laser transponders and precise clocks can be configured to measure their mutual distances to within few cm. High on-board power can create substantial non-inertial contribution to the spacecraft trajectory. We propose to alleviate this contribution by employing secondary ranging to a passive daughter spacecraft. Such constellation can form the basis of it navigation system capable of providing position information anywhere in the soIar system with similar accuracy. Apart from obvious Solar System exploration implications, this system can provide robust reference for GPS and its successors.

Penanen, Konstantin I.; Chui, Talso

2006-01-01

22

Ethnography for Teachers' Professional Development: Japanese Approach of Investigation on Classroom Activities  

ERIC Educational Resources Information Center

In this paper, we examine how journal and ethnography field notes in Jugyou Kenkyu (lesson study) help teachers to understand the diverse range of talents and abilities of their students. Especially, we focus on how ethnography field note and reflective papers (karate) help teachers to change their assumptions about student learning. The data…

Matoba, Masami; Sarkar Arani Mohammed Reza

2006-01-01

23

1995 nendo kenkyu kyoryoku suishin jigyo 'kenkyu kyoryoku shindan chosa' hokokusho. (Report on the fiscal 1995 research cooperation promotion project, 'the research cooperation diagnosis survey').  

National Technical Information Service (NTIS)

A diagnosis survey was conducted for Japan to cooperate in researching subjects on technical development in developing countries. In fiscal 1995, surveys were made on the following: (1) recycling technology of biomass industrial waste in the tropical regi...

1996-01-01

24

Aerospace Systems  

NSDL National Science Digital Library

This pdf contains a syllabus for a course on aerospace systems as part of the Aerospace Technology Program. This course covers an introduction to expendable and reusable Space Launch Vehicle (SLV) systems including hydraulic, pneumatic, electrical, propulsion, mechanical, HVAC (heating, ventilation and air conditioning), and ECLSS (Environmental Control and Life Support Systems). How systems interact with computer and data acquisition systems is also covered.

2011-08-11

25

Aesthetics Systems.  

National Technical Information Service (NTIS)

The formal structure of aesthetics systems is defined. Aesthetics systems provide for the essential tasks of interpretation and evaluation is aesthetic analysis. Kolmogorov's formulation of information theory is applicable. An aesthetics system for a clas...

J. Gips G. Stiny

1973-01-01

26

Mechanical Systems  

NASA Technical Reports Server (NTRS)

The presentation provides an overview of requirement and interpretation letters, mechanical systems safety interpretation letter, design and verification provisions, and mechanical systems verification plan.

Davis, Robert E.

2002-01-01

27

Operating Systems  

NSDL National Science Digital Library

CSC 342. Operating Systems (3) Prerequisite: CSC 332. Study of supervisory programs. System services and file systems; CPU scheduling; memory management; virtual memory; disk scheduling. Deadlock characterization, prevention, and avoidance; concurrent processes; semaphores; critical sections; synchronization. Distributed systems and communication protocols.

Ferner, Clayton

2003-04-21

28

Solar System  

NSDL National Science Digital Library

At the end of this project, you will be able to explain the components of the Solar System and know the order of the planets starting from the Sun. Objective Question: What is the Solar System? First, listen and read about the Solar System 1. How many planets make up our Solar System? 2. What is at the center of the Solar System? Next,listen and read about the Planets. 1. Can you name all of the planets? Finally, listen and watch The Solar System Movie. 1. Can you list the ...

Ms.west

2009-07-07

29

Robot Systems.  

National Technical Information Service (NTIS)

This article reviews currently available industrial robots and research on robot systems. A hierarchical control structure concept, which is the basis for NBS research efforts in computer control systems, is used to provide a framework for this review. Co...

J. S. Albus J. M. Evans

1976-01-01

30

Skeptical Systems.  

National Technical Information Service (NTIS)

This report describes the technical components developed for hostile intent recognition, and documents specific experiments to evaluate a demonstration skeptical system in a cyber security domain. Current systems execute any command issued by an authentic...

C. W. Geib

2004-01-01

31

System considerations  

NASA Technical Reports Server (NTRS)

Closing remarks and a general summary of the Alternative Energy Systems Seminar are presented. It was concluded from the seminar that the DOE programs described were focused on trying to make a commercial market develop for the various systems. The question addressed is how this is going to happen. To address this question, social, economical, political and technical aspects are considered with major emphasis placed on systems engineering to provide low cost efficient systems.

Alper, M. E.

1978-01-01

32

Tracking systems  

Microsoft Academic Search

The tutorial is an overview of tracking and data fusion for surveillance systems with applications both to defense and civilian systems. It is divided into four parts: Part 1 - Filtering: Covers the topics related to state estimation for stochastic dynamic systems: optimal Bayesian estimator, Kalman filter, nonlinear filters (extended and unscented Kalman filter, Gaussian sum filter, particle filter); filters

B. Ristic; M. L. Hernandez

2008-01-01

33

Solar System  

NSDL National Science Digital Library

An introduction to to the solar system. How to distinguish between the different planets. Activities to play while getting to know the solar system. Cosmic Cookies Solar System Scavenger Hunt Edible Earth Strawkets and Control Strawkets and Thrust Strawkets and Weight ...

Wright, Ms.

2009-10-09

34

Systems 2020.  

National Technical Information Service (NTIS)

Systems 2020 is the research effort to answer a major portion of the challenge embodied in the DoD's science and technology priority for Engineered Resilient Systems (ERS). As a follow-on to the SERC's work in defining technical approaches for Systems 202...

B. Boehm S. Rifkin

2012-01-01

35

Systems Engineering  

Microsoft Academic Search

Each year at the National Council of Systems Engineering (NCOSE) symposium lots of dedicated people spend a lot of energy assessing, measuring and educating people about an incomplete body of knowledge (systems engineering). The incompleteness is due to the lack of a definition of what that body of knowledge is supposed to cover. Now every systems engineer knows that it

Joe Kasser

1969-01-01

36

System Effectiveness  

SciTech Connect

An effective risk assessment system is needed to address the threat posed by an active or passive insider who, acting alone or in collusion, could attempt diversion or theft of nuclear material. It is critical that a nuclear facility conduct a thorough self-assessment of the material protection, control, and accountability (MPC&A) system to evaluate system effectiveness. Self-assessment involves vulnerability analysis and performance testing of the MPC&A system. The process should lead to confirmation that mitigating features of the system effectively minimize the threat, or it could lead to the conclusion that system improvements or upgrades are necessary to achieve acceptable protection against the threat. Analysis of the MPC&A system is necessary to understand the limits and vulnerabilities of the system to internal threats. Self-assessment helps the facility be prepared to respond to internal threats and reduce the risk of theft or diversion of nuclear material. MSET is a self-assessment or inspection tool utilizing probabilistic risk assessment (PRA) methodology to calculate the system effectiveness of a nuclear facility's MPC&A system. MSET analyzes the effectiveness of an MPC&A system based on defined performance metrics for MPC&A functions based on U.S. and international best practices and regulations. A facility's MC&A system can be evaluated at a point in time and reevaluated after upgrades are implemented or after other system changes occur. The total system or specific subareas within the system can be evaluated. Areas of potential performance improvement or system upgrade can be assessed to determine where the most beneficial and cost-effective improvements should be made. Analyses of risk importance factors show that sustainability is essential for optimal performance. The analyses reveal where performance degradation has the greatest detrimental impact on total system risk and where performance improvements have the greatest reduction in system risk. The risk importance factors show the amount of risk reduction achievable with potential upgrades and the amount of risk reduction actually achieved after upgrades are completed. Applying the risk assessment tool gives support to budget prioritization by showing where budget support levels must be sustained for MC&A functions most important to risk. Results of the risk assessment are also useful in supporting funding justifications for system improvements that significantly reduce system risk.

Powell, Danny H [ORNL] [ORNL; Elwood Jr, Robert H [ORNL] [ORNL

2011-01-01

37

Cryogenic Systems  

NASA Astrophysics Data System (ADS)

In this lecture we discuss the principle of method of cooling to a very low temperature, i.e. cryogenic. The "gas molecular model" will be introduced to explain the mechanism cooling by the expansion engine and the Joule-Thomson expansion valve. These two expansion processes are normally used in helium refrigeration systems to cool the process gas to cryogenic temperature. The reverse Carnot cycle will be discussed in detail as an ideal refrigeration cycle. First the fundamental process of liquefaction and refrigeration cycles will be discussed, and then the practical helium refrigeration system. The process flow of the system and the key components; -compressor, expander, and heat exchanger- will be discussed. As an example of an actual refrigeration system, we will use the cryogenic system for the KEKB superconducting RF cavity. We will also discuss the liquid helium distribution system, which is very important, especially for the cryogenic systems used in accelerator applications. 1 Principles of Cooling and Fundamental Cooling Cycle 2 Expansion engine, Joule-Thomson expansion, kinetic molecular theory, and enthalpy 3 Liquefaction Systems 4 Refrigeration Systems 5 Practical helium liquefier/refrigeration system 6 Cryogenic System for TRISTAN Superconducting RF Cavity

Hosoyama, Kenji

2002-02-01

38

Systems Thinking 2: Thermodynamic Systems  

NSDL National Science Digital Library

This video explains thermodynamic systems, open and closed systems, and the four key properties of a system. This video is part of the Sustainability Learning Suites, made possible in part by a grant from the National Science Foundation. See 'Learn more about this resource' for Learning Objectives, Assessment, and Activities.

Vanasupa, Linda

39

Daigaku Nyugakusha Senbatsu Hoho ni kansuru Kenkyu' (Research on Examination for Entrance into Universities).  

ERIC Educational Resources Information Center

This document is an English-language abstract (approximately 1,500 words) of a series of research papers on the selection of college and university students. One paper compared the scores gained by three different types of entrants to six universities attracting applicants of high quality. It was found that a candidate has almost no chance of…

Bulletin, 1969

1969-01-01

40

Fukugo jirukoniumu sankabutsu ni kansuru kenkyu. (Study of composite zirconium oxide).  

National Technical Information Service (NTIS)

This paper is a collection of research reports of 1993 regarding inorganic materials published by Japan Science and Technology Agency. The research subject is ZrO2-MOx. The principal component of the composite oxide under research, ZrO2, is multifunctiona...

1993-01-01

41

Study on the Aerodynamic Characteristics of Passenger Cars (Jyoyosha no Kuuryokuteki Shotokusei no Kenkyu).  

National Technical Information Service (NTIS)

A description is given of the requirements of wind tunnels for testing automobiles, and details are provided of the results of recent full-scale aerodynamic tests undertaken by Mitsubishi. Topics include (1) the effects of rear-end shape, floor shape, and...

H. Shibata M. Sakota K. Nakagawa

1983-01-01

42

Fukushi kiki needs seeds tekigo chosa kenkyu. (Investigational research on welfare equipment needs/seeds adaptation).  

National Technical Information Service (NTIS)

At the advent of the aging society, investigated are images of welfare equipment to be developed. In the range where the use of welfare equipment is to be studied, the following are included: self care, excretion, transfer, and support of work other than ...

1995-01-01

43

Bunkaisei plastic no chosa kenkyu. (Investigation on research for degradable plastics).  

National Technical Information Service (NTIS)

The paper investigates and reports problems on plastic waste and measures to solve them, and the developmental trend of main biodegradable plastics in the world. A large quantity of plastic waste neither rots nor returns to the nature even if reclaimed. T...

M. Nishiyama J. Hosokawa K. Yoshihara T. Kubo H. Kabeya

1994-01-01

44

Saibo zoshoku seigyo gijutsu no sendo kenkyu. (Leading research on artificial techniques controlling cellular function).  

National Technical Information Service (NTIS)

Advanced research and its applicability were surveyed to apply the advanced functional cells to industry. The basic target was set to develop, produce, control and utilize the functional cells, such as intelligent materials and self-regulation bioreactors...

1996-01-01

45

Masoscopic zairyo no nano kaiseki ni kansuru kenkyu. (Studies on nanometer scale analysis of masoscopic materials).  

National Technical Information Service (NTIS)

With an objective of developing advanced materials by making the materials micronized and multi-layered up to mesoscopic scales, studies were made on nanometer scale analysis of ultra-fine structure. The mesoscopic scales include sizes from nanometers to ...

1994-01-01

46

Geothermal systems  

NASA Technical Reports Server (NTRS)

Several tasks of JPL related to geothermal energy are discussed. The major task is the procurement and test and evaluation of a helical screw drive (wellhead unit). A general review of geothermal energy systems is given. The presentation focuses attention on geothermal reservoirs in California, with graphs and charts to support the discussion. Included are discussions on cost analysis, systems maintenance, and a comparison of geothermal and conventional heating and cooling systems.

Mohl, C.

1978-01-01

47

Operating Systems  

NSDL National Science Digital Library

Rashid Bin Muhammad at Kent State University presents his page of lectures notes and other instructional materials on operating systems. The site is divided into a number of topics about operating systems: history, structure, process, threads, Solaris-2, CPU / process scheduling, schedule algorithm, interprocess communication, deadlock, important UNIX commands, and references. The site is then followed by links to outside resources to help supplement the material presented here. This is a great resource for computer science instructors teaching students about operating systems.

Bin Muhammad, Rashid

2009-06-24

48

Operating Systems  

NSDL National Science Digital Library

Stanford's Computer Science department presents this course on operating systems taught by David Mazières in Winter of 2009. The course covers concurrency, synchronization, scheduling, linking, virtual memory, memory allocations, file systems, networking, protection, security, and virtual machines. On the site, visitors will find the course syllabus, lecture notes, reference materials, and old exams from past iterations of the course. There are also four programming projects on the following topics: threads, user programs, virtual memory, and file systems. It's an excellent resource for educators in computer science and technician training courses to help supplement operating systems education.

Maziãâ¨res, David

2009-01-01

49

Carbon Systems  

SciTech Connect

The electronic states of a 'quantum dot-graphene monolayer-SiO{sub 2} + n{sup +}-Si substrate' system in an external magnetic field are studied. An analytical expression for charge transfer in this system is obtained. The electronic states of a 'quantum dot-graphene bilayer-SiO{sub 2} + n{sup +}-Si substrate' system are considered. The systems under study are interesting from the viewpoint of controlling the optical properties of a quantum dot by means of an applied electric field.

Alisultanov, Z. Z., E-mail: zaur0102@gmail.com [Russian Academy of Sciences, Prokhorov General Physics Institute (Russian Federation)

2013-06-15

50

[Melanocortin system].  

PubMed

Melanocortin system consists of native melanocortin peptides (ACTH, MSH and their fragments), melanocortin receptors (MC1R-MC5R) and their endogenous antagonists. Melanocortins have a wide spectrum of physiological activity. These peptides improve memory and attention, facilitate neuromuscular regeneration, exert neuroprotective action, affect the development of nervous system, modulate sexual behavior, have anti-inflammatory and antipyretic effects, interact with opioid system, affect the pain sensitivity and cardiovascular system, decrease food intake and body weight, influence on exocrine secretions. PMID:19326848

Levitskaia, N G; Kamenski?, A A

2009-01-01

51

SCALPEL system  

NASA Astrophysics Data System (ADS)

We have proposed an approach to projection electron beam lithography, termed the SCALPEL system, which we believe offers solutions to previous problems associated with projection electron beam lithography.

Berger, Steven D.; Biddick, Chris; Blakey, Myrtle; Bolan, Kevin J.; Bowler, Stephen W.; Brady, Kevin; Camarda, Ron; Connelly, Wayne; Farrow, Reginald C.; Felker, Joseph A.; Fetter, Linus A.; Harriott, Lloyd R.; Huggins, Harold A.; Kraus, Joe; Liddle, J. A.; Mkrtchyan, Masis M.; Novembre, Anthony E.; Peabody, Milton; Russell, Tom; Simpson, Wayne M.; Tarascon, Regine G.; Wade, H. H.; Waskiewicz, Warren K.; Watson, Pat

1994-12-01

52

Anticipatory systems as linguistic systems  

NASA Astrophysics Data System (ADS)

The idea of system is well established although not well defined. What makes up a system depends on the observer. Thinking in terms of systems is only a convenient way to conceptualize organizations, natural or artificial, that show coherent properties. Among all properties, which can be ascribed to systems, one property seems to be more outstanding than others, namely that of being anticipatory. In nature, anticipatory properties are found only in living organizations. In this way it can be said to separate non-living systems from living because there is no indication that any natural phenomenon occurring in systems where there is no indication of life is anticipatory. The characteristic of living systems is that they are exposed to the evolution contrary to causal systems that do not undergo changes due to the influence of the environment. Causal systems are related to the past in such a way that subsequent situations can be calculated from knowledge of past situations. In causal systems the past is the cause of the present and there is no reference to the future as a determining agent, contrary to anticipatory systems where expectations are the cause of the present action. Since anticipatory properties are characteristic of living systems, this property, as all other properties in living systems, is a result of the evolution and can be found in plants as well as in animals. Thus, it is not only tied to consciousness but is found at a more basic level, i.e., in the interplay between genotype and phenotype. Anticipation is part of the genetic language in such a way that appropriate actions, for events in the anticipatory systems environment, are inscribed in the genes. Anticipatory behavior, as a result of the interpretation of the genetic language, has been selected by the evolution. In this paper anticipatory systems are regarded as linguistic systems and I argue that as such anticipation cannot be fragmented but must be holistically studied. This has the implication that anticipatory behavior can only partially be described in a computer language and, furthermore, it shows that only a restricted class of anticipatory systems can be transferred to computers. .

Ekdahl, Bertil

2000-05-01

53

Anesthesia systems.  

PubMed

Anesthesia systems are used to induce general anesthesia during surgery. In addition, the systems track anesthetic agent and gas concentrations, as well as the patient's condition, using physiologic and multigas monitors. For this Update Evaluation, we present our findings for four newly evaluated models from two manufacturers and summarize our findings for the two previously evaluated models that are still on the market. (Our earlier Evaluations were published in the May-June 1996 and January 1998 issues of Health Devices.) As in the previous Evaluations, our ratings are based largely on the degree of system integration, the suitability of the systems for various types of procedures, and cost. When equipped with the appropriate monitors, all the systems can deliver anesthesia effectively and can meet the minimum monitoring requirements of general surgery. While no system met all our criteria, any limitations of the systems can easily be overcome by the purchaser. We rate two models Preferred. One provides performance and features similar to the other evaluated systems at a significantly lower cost. The second offers exceptional flexibility in meeting monitoring requirements. Three models are rated Acceptable, and the remaining model is rated Acceptable (with Conditions). It is Acceptable only if it is equipped to supply air as an inspired gas. PMID:11989067

2002-04-01

54

Digestive System  

NSDL National Science Digital Library

The digestive system is investigated in this learning activity to help participants learn how food is broken down and prepared for absorption, and list the components of the digestive system as well as their functions. Organs investigated include the mouth, esophagus, stomach, small intestine, large intestine, rectum, and anus.

Bidlack, Jim

55

Turbocompound system  

Microsoft Academic Search

A turbocompound system is described for improving the performance of an internal combustion engine without substantially increasing an end viewed profile of the engine to which it is mounted in use. The system consists of: (a) an exhaust driven turbocharger means having an exhaust manifold means extending in an axial direction for collecting exhaust gases from engine cylinders and delivering

Fox

1986-01-01

56

ECONOMIC SYSTEMS  

NSDL National Science Digital Library

The information you will explore is: List and categorize the four main types of Economic Systems in our world today. Create graphic Illustrations of thoughts and concepts. Express how economic system structures effect the lives of the people living in that system. Write to express an opinion or point of view. Experience a simulation of the marketplace. Research a country of your choice and find important factors about their economic system. Each country structures their economic system after one of the four main types or a combination of these. The assignments on this page will help you to gain a better understanding of the characteristics of the four main types of economic systems. Process: 1. Click on the following link Marketing Calendar Open the Global Economy power point. Use the Chapter 4 listening guide with the power point. chap4 listening guide 2. List the four main economic systems and find the main characterisitics of each. Compare strengths and weaknesses of each. Economic Systems Characteristics 3.Create a ...

Mrs.owen

2006-10-10

57

Power system  

DOEpatents

A power system includes a prime mover, a transmission, and a fluid coupler having a selectively engageable lockup clutch. The fluid coupler may be drivingly connected between the prime mover and the transmission. Additionally, the power system may include a motor/generator drivingly connected to at least one of the prime mover and the transmission. The power-system may also include power-system controls configured to execute a control method. The control method may include selecting one of a plurality of modes of operation of the power system. Additionally, the control method may include controlling the operating state of the lockup clutch dependent upon the mode of operation selected. The control method may also include controlling the operating state of the motor/generator dependent upon the mode of operation selected.

Hickam, Christopher Dale (Glasford, IL)

2008-03-18

58

Systems and Components Fuel Delivery System, Water Delivery System, ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

Systems and Components - Fuel Delivery System, Water Delivery System, Derrick Crane System, and Crane System Details - Marshall Space Flight Center, F-1 Engine Static Test Stand, On Route 565 between Huntsville and Decatur , Huntsville, Madison County, AL

59

Respiratory system  

NASA Technical Reports Server (NTRS)

The general anatomy and function of the human respiratory system is summarized. Breathing movements, control of breathing, lung volumes and capacities, mechanical relations, and factors relevant to respiratory support and equipment design are discussed.

Bartlett, R. G., Jr.

1973-01-01

60

Earth Systems  

NSDL National Science Digital Library

This self-contained module on Earth systems includes a range of fun activities that students can perform in the classroom and at home with family members. They impart important concepts such as observation, identification, measurement, and differentiation.

Science, Houghton M.

61

Hypernuclear systems  

SciTech Connect

The weak and strong interaction components of the hyperon-nucleon interaction in nuclei are discussed via the ..lambda..N system. Also, strangeness S = -2 dibaryon searches are discussed via the ..gamma..N interaction. (AIP)

Barnes, P.D.

1984-11-15

62

Fueling systems  

SciTech Connect

This report deals with concepts of the Tiber II tokamak reactor fueling systems. Contained in this report are the fuel injection requirement data, startup fueling requirements, intermediate range fueling requirements, power range fueling requirements and research and development considerations. (LSR)

Gorker, G.E.

1987-01-01

63

Root systems  

NSDL National Science Digital Library

One purpose that roots serve is that of anchoring the plant in the ground. Roots also take up water and nutrients for the plant. Plants all have different root system types to fit their individual needs and locations.

N/A N/A (U.S. Government;)

2004-10-30

64

Authoring Systems.  

National Technical Information Service (NTIS)

The monograph provides background information about authoring technology and assesses its current status. Part 1 provides basic information about authoring systems and compares them to other authoring approaches. Part 2 examines assumptions made about the...

C. Locatis E. Ullmer V. Carr R. Banvard R. Lo

1992-01-01

65

Navigation systems  

NASA Astrophysics Data System (ADS)

The elements of the measurement and communications network comprising the global deep space navigation system (DSN) for NASA missions are described. Among the measurement systems discussed are: VLBI, two-way Doppler and range measurements, and optical measurements carried out on board the spacecraft. Processing of navigation measurement is carried out using two modules: an N-body numerical integration of the trajectory (and state transition partial derivatives) based on pre-guessed initial conditions; and partial derivatives of simulated observables corresponding to each actual observation. Calculations of velocity correction parameters is performed by precise modelling of all physical phenomena influencing the observational measurements, including: planetary motions; tracking station locations, gravity field structure, and transmission media effects. Some of the contributions to earth-relative orbit estimate errors for the Doppler/range system on board Voyager are discussed in detail. A line drawing of the DSN navigation system is provided.

Jordan, J. F.

1985-10-01

66

Information Systems.  

National Technical Information Service (NTIS)

This report was prepared by Stanford University under contract with the National Iranian Radio Television. The task assignment was the report concerns analysis of information systems and services that could be used to facilitate the storage and retrieval ...

E. B. Parker C. Sartori H. Breitrose E. Elliot

1976-01-01

67

Digestive System  

MedlinePLUS

... of the immune system to a protein called gluten, which is found in wheat, rye, and barley ... and even depression when they eat foods with gluten. Symptoms can be managed by following a gluten- ...

68

Respiratory System  

NSDL National Science Digital Library

The purpose, components, and functions of the respiratory system are presented in this learning through disussion and visualizations. Participants learn about the nasal cavity, pharynx, larynx, trachea, bronchi, bronchioles, and alveoli.

Bidlack, Jim

69

Microelectromechanical Systems  

NASA Technical Reports Server (NTRS)

Micro-electromechanical systems (MEMS) is an enabling technology that merges computation and communication with sensing and actuation to change the way people and machines interact with the physical world. MEMS is a manufacturing technology that will impact widespread applications including: miniature inertial measurement measurement units for competent munitions and personal navigation; distributed unattended sensors; mass data storage devices; miniature analytical instruments; embedded pressure sensors; non-invasive biomedical sensors; fiber-optics components and networks; distributed aerodynamic control; and on-demand structural strength. The long term goal of ARPA's MEMS program is to merge information processing with sensing and actuation to realize new systems and strategies for both perceiving and controlling systems, processes, and the environment. The MEMS program has three major thrusts: advanced devices and processes, system design, and infrastructure.

Gabriel, Kaigham J.

1995-01-01

70

Endocrine System  

MedlinePLUS

... in regulating mood, growth and development, tissue function, metabolism, and sexual function and reproductive processes. In general, ... in the body, the body's response to stress, metabolism, the immune system, and sexual development and function. ...

71

Embedded Systems  

NSDL National Science Digital Library

Embedded systems are dedicated computers designed to perform a specific task. They are usually fairly simple devices that are used in areas where powerful, customizable computers are unnecessary; however, they can also be quite complex on occasion. Embedded systems can be found almost anywhere, including automobiles and cellular phones, and their importance is reflected in their near omnipresence.An excellent introduction to embedded systems can be found in the first three pages of this online course material (1). The educational module gives a thorough definition of embedded systems, several examples of where they are used, and a discussion of their common components. For a more detailed explanation of how these devices are used to control various appliances, motors, and other real world products, this site (2) is worth a visit. Sixteen sections comprise the site, and each includes background information and an example experiment. Although certain equipment is required for the experiments, much can be learned simply from reading the introductions. This enlightening essay (3) documents the history and development of embedded systems. Despite being somewhat specific to the author's life, it effectively illustrates the evolution of embedded systems and their incorporation into many facets of everyday life. A paper presented at the 2003 International Cryptology Conference (4) considers the vulnerability of embedded cryptosystems to side channel attacks, which are different from normal security violations because they involve monitoring parts of the hardware system instead of the software. The authors propose the design of private circuits that are resistant to such attacks. The Center for Robotics and Embedded Systems at the University of Southern California is the source of this paper (5) about networked robots. Although it is somewhat dated, the paper provides some valuable insights into how robots can be used in human environments and how they can be controlled and coordinated with wireless communications. An article from Dedicated Systems Magazine (6) highlights the role of embedded systems in NASA's Mars Exploration Rovers, which were launched in June and July 2003. The technologies that enabled the rovers to have powerful, reliable operation are described. The April 2003 issue of ACM Queue (7), the online magazine of the Association for Computing Machinery, is dedicated to embedded systems. Seven articles are included in the issue, dealing with the design and construction process of embedded devices and the hardware/software interface. Lastly, a short paper that was presented at a computer architecture symposium in January 2003 looks ahead to the realization of ubiquitous computing (8). This technology revolution, which has been predicted for many years, promises to make tiny computers embedded in virtually everything, even clothing and walls. The author focuses on the area of intelligent vehicles and wheeled mobile robots.

Leske, Cavin.

72

Complex Systems  

PubMed Central

Physiologic systems in health and disease display an extraordinary range of temporal behaviors and structural patterns that defy understanding based on linear constructs, reductionist strategies, and classical homeostasis. Application of concepts and computational tools derived from the contemporary study of complex systems, including nonlinear dynamics, fractals and “chaos theory,” is having an increasing impact on biology and medicine. This presentation provides a brief overview of an emerging area of biomedical research, including recent applications to cardiopulmonary medicine and chronic obstructive lung disease.

Goldberger, Ary L.

2006-01-01

73

Biomedical Systems  

Microsoft Academic Search

\\u000a The phenomenal success and widespread proliferation of microelectronic devices can be attributed in large part to the mass\\u000a production technologies that have been developed for their manufacture. These microfabrication techniques have been honed\\u000a to maximize device yield and microelectromechanical systems (MEMS) capitalize on these semiconductor microfabrication tools\\u000a to create miniature systems that meld electronic and mechanical functions. Miniaturization brings with

Whye-Kei Lye; Michael Reed

74

Digestive System  

NSDL National Science Digital Library

The digestive system is amazing: it takes the foods we eat and breaks them into smaller components that our bodies can use for energy, cell repair and growth. This lesson introduces students to the main parts of the digestive system and how they interact. In addition, students learn about some of the challenges astronauts face when eating in outer space. Engineers figure out how to deal with such challenges.

Integrated Teaching And Learning Program

75

Laser Systems  

NASA Technical Reports Server (NTRS)

Tunable diode lasers are employed as radiation sources in high resolution infrared spectroscopy to determine spectral characteristics of gaseous compounds. With other laser systems, they are produced by Spectra-Physics, and used to monitor chemical processes, monitor production of quantity halogen lamps, etc. The Laser Analytics Division of Spectra-Physics credits the system's reliability to a program funded by Langley in the 1970s. Company no longer U.S.-owned. 5/22/97

1985-01-01

76

Systemic trauma.  

PubMed

Substantial theoretical, empirical, and clinical work examines trauma as it relates to individual victims and perpetrators. As trauma professionals, it is necessary to acknowledge facets of institutions, cultures, and communities that contribute to trauma and subsequent outcomes. Systemic trauma-contextual features of environments and institutions that give rise to trauma, maintain it, and impact posttraumatic responses-provides a framework for considering the full range of traumatic phenomena. The current issue of the Journal of Trauma & Dissociation is composed of articles that incorporate systemic approaches to trauma. This perspective extends conceptualizations of trauma to consider the influence of environments such as schools and universities, churches and other religious institutions, the military, workplace settings, hospitals, jails, and prisons; agencies and systems such as police, foster care, immigration, federal assistance, disaster management, and the media; conflicts involving war, torture, terrorism, and refugees; dynamics of racism, sexism, discrimination, bullying, and homophobia; and issues pertaining to conceptualizations, measurement, methodology, teaching, and intervention. Although it may be challenging to expand psychological and psychiatric paradigms of trauma, a systemic trauma perspective is necessary on both scientific and ethical grounds. Furthermore, a systemic trauma perspective reflects current approaches in the fields of global health, nursing, social work, and human rights. Empirical investigations and intervention science informed by this paradigm have the potential to advance scientific inquiry, lower the incidence of a broader range of traumatic experiences, and help to alleviate personal and societal suffering. PMID:24617751

Goldsmith, Rachel E; Martin, Christina Gamache; Smith, Carly Parnitzke

2014-01-01

77

Complex Systems  

NASA Astrophysics Data System (ADS)

This book explores the exciting new field of complexity. It features in-depth coverage of important theoretical areas, including fractals, chaos, nonlinear dynamics, artificial life, and self organization. It also provides overviews of complexity in several applied areas, including parallel computation, control systems, neural systems, and ecosystems. Contributors examine some of the properties that best characterize complex systems, including algorithmic richness, nonlinearity, and abundant interactions between components. In this way the book draws themes, especially the ideas of connectivity and natural computation, that reveal deep, underlying similarities among phenomena that have formerly been treated as completely distinct. Researchers in a wide array of fields, including ecology, neuroscience, computer science, and mathematics, will find this volume to be a fascinating collection of ideas.

Bossomaier, Terry R. J.; Green, David G.

2000-07-01

78

System Overview  

NSDL National Science Digital Library

This is a description for a learning module from Maricopa Advanced Technology Education Center. This PDF describes the module; access may be purchased by visiting the MATEC website. Technicians face the challenge of building and maintaining knowledge and skills that are applicable to microcomputer architecture. These challenges include keeping up to date on improvements in PC components, changes in PC hardware configurations, integration of new devices within PC systems, and the ability to readily apply their knowledge within the microcomputer manufacturing industry. This module provides an introduction and overview to the major system features that define the architecture of an Intel-based PC. A unique multimedia self-tutorial is included.

2011-08-22

79

Manufacturing Systems  

NSDL National Science Digital Library

Objective 7:05 - Students will develop an awareness of the designed World through : Describing a manufacturing system; listing and describing the basic type of manufacturing; defining production and manufacturing enterprise;defining AGV, CAD, CIM, CAM, CNC, production tooling, automation, and material processes. Day 1: Introduction/Background Objective Preassessment: Use a KWL chart to assess your students prior knowledge. This will also help you deal with any misconceptions regarding manufacturing system. Students will use the curriculum companion PowerPoint and Objective 7.05 Outline to develop an awarness of: Define manufacturing List and describe the basic types of Manufacturing Student ...

Wallace, S.

2010-07-16

80

Microbiology System  

NASA Technical Reports Server (NTRS)

Technology originating in a NASA-sponsored study of the measurement of microbial growth in zero gravity led to the development of Biomerieux Vitek, Inc.'s VITEK system. VITEK provides a physician with accurate diagnostic information and identifies the most effective medication. Test cards are employed to identify organisms and determine susceptibility to antibiotics. A photo-optical scanner scans the card and monitors changes in the growth of cells contained within the card. There are two configurations - VITEK and VITEK JR as well as VIDAS, a companion system that detects bacteria, viruses, etc. from patient specimens. The company was originally created by McDonnell Douglas, the NASA contractor.

1992-01-01

81

Neuromodulatory systems  

PubMed Central

We examine the interactions and interdependencies between Neuroglia, the Brain-Cell Microenvironment, and the processes commonly subsumed under Neuromodulation. The interactions of the component processes covering a wide spectrum of frequencies are designated as Neuromodulatory Systems (NMS). This implies NMS's scale-invariance as the capacity of linking actions across many time scales, and self-similarity at any scale. These features endow NMS with the ability to respond adaptively to neural impulse traffic of an unpredictably wide frequency spectrum. In this preliminary perspective, the components of NMS are only outlined based on concepts of Complex Systems Dynamics. However, their interactions must be formally elaborated in further investigations.

Werner, Gerhard; Mitterauer, Bernhard J.

2013-01-01

82

Anesthesia systems.  

PubMed

This Evaluation presents ECRI's detailed findings for three newly tested anesthesia systems and updated ratings for three previously evaluated ones. The study focuses on models intended for the full range of inpatient surgical applications. That is, we consider whether and how well the systems--three supplied by Datex-Ohmeda and three supplied by Draeger Medical--can meet the needs of patients covering a wide range of ages, sizes, and conditions. We also consider the adequacy of the systems' safety features, the comprehensiveness of their pre-use checks, and ease of use. We found that all the evaluated units generally perform well, displaying comparable accuracy and consistency of delivery when similarly equipped (e.g., with comparable ventilation modes). However, all the systems also have critical limitations associated with their pre-use check procedures. Several units also exhibit problems with the handling of important alarms under certain conditions. Our ratings will help guide healthcare facilities both when selecting a model and when determining which options to purchase. In several cases, models that are otherwise appropriate for use are rated Not Recommended for purchase if they are not equipped with certain options. And in one case, we rate a unit Unacceptable for purchase if it is not equipped with a safety feature that can help reduce the risk of surgical fires. PMID:16913466

2006-07-01

83

Circulatory system  

NSDL National Science Digital Library

The circulatory system includes the heart, blood vessels, and blood. Arteries take blood with oxygen to our organs; veins bring deoxygenated blood to the heart (to be pumped to the lungs to get oxygen). Arteries and veins bring essential nutrients from digestion (such as glucose) to our tissues as well.

Katie Hale (CSUF;)

2007-01-22

84

Embedded Systems  

NSDL National Science Digital Library

The April 2003 issue of ACM Queue, the online magazine of the Association for Computing Machinery, is dedicated to embedded systems. Seven articles are included in the issue, dealing with the design and construction process of embedded devices, programming, and the hardware/software interface.

2008-02-08

85

D System  

NSDL National Science Digital Library

D-System is conducting research into program analysis, code generation, and programming tools for data-parallel languages like High Performance Fortran. If this research is successful, computational scientists and engineers will be able to write machine-independent, data-parallel programs for a broad spectrum of scientific applications, and achieve high performance with these programs on a variety of parallel architectures.

86

System Dynamics  

NASA Astrophysics Data System (ADS)

System dynamics is an approach for thinking about and simulating situations and organisations of all kinds and sizes by visualising how the elements fit together, interact and change over time. This chapter, written by John Morecroft, describes modern system dynamics which retains the fundamentals developed in the 1950s by Jay W. Forrester of the MIT Sloan School of Management. It looks at feedback loops and time delays that affect system behaviour in a non-linear way, and illustrates how dynamic behaviour depends upon feedback loop structures. It also recognises improvements as part of the ongoing process of managing a situation in order to achieve goals. Significantly it recognises the importance of context, and practitioner skills. Feedback systems thinking views problems and solutions as being intertwined. The main concepts and tools: feedback structure and behaviour, causal loop diagrams, dynamics, are practically illustrated in a wide variety of contexts from a hot water shower through to a symphony orchestra and the practical application of the approach is described through several real examples of its use for strategic planning and evaluation.

Morecroft, John

87

Denitrification system  

Microsoft Academic Search

An improved multi-stage treatment system is described for biological denitrification of and suspended solids removal from water which comprises: a biological reactor, an aeration chamber and an automatic backwash filter, the reactor including a tank having a lower tank portion, a central tank portion and an upper tank portion, influent distribution means positioned in the lower tank portion, rigid media

Kanow

1993-01-01

88

Auditory system  

NASA Technical Reports Server (NTRS)

The physical correlations of hearing, i.e. the acoustic stimuli, are reported. The auditory system, consisting of external ear, middle ear, inner ear, organ of Corti, basilar membrane, hair cells, inner hair cells, outer hair cells, innervation of hair cells, and transducer mechanisms, is discussed. Both conductive and sensorineural hearing losses are also examined.

Ades, H. W.

1973-01-01

89

STAR System.  

ERIC Educational Resources Information Center

The STAR System is a developmental guidance approach to be used with elementary school children in the 5th or 6th grades. Two basic purposes underlie STAR: to increase learning potential and to enhance personal growth and development. STAR refers to 4 basic skills: sensory, thinking, adapting, and revising. Major components of the 4 skills are:…

Doverspike, James E.

90

Cardiovascular system  

MedlinePLUS Videos and Cool Tools

... from the tissues to the systems of the body through which they are eliminated. Most of the blood is made up of a watery, protein-laden fluid called plasma. A little less than half of this blood volume is composed of red and white blood cells, and other solid elements called platelets.

91

Digestive System  

NSDL National Science Digital Library

This site contains a section of an online Biology Textbook - developed by Dr. Michael Gregory of Clinton Community College - providing a concise overview of the digestive system. It describes the enzymes, carbohydrates, proteins, and lipids involved in digestion and outlines the role that each part of the body plays from the mouth the large intestine.

Gregory, Michael

1969-12-31

92

Systems Biology  

SciTech Connect

The biology revolution over the last 50 years has been driven by the ascendancy of molecular biology. This was enthusiastically embraced by most biologists because it took us into increasingly familiar territory. It took mysterious processes, such as the replication of genetic material and assigned them parts that could be readily understood by the human mind. When we think of ''molecular machines'' as being the underlying basis of life, we are using a paradigm derived from everyday experience. However, the price that we paid was a relentless drive towards reductionism and the attendant balkanization of biology. Now along comes ''systems biology'' that promises us a solution to the problem of ''knowing more and more about less and less''. Unlike molecular biology, systems biology appears to be taking us into unfamiliar intellectual territory, such as statistics, mathematics and computer modeling. Not surprisingly, systems biology has met with widespread skepticism and resistance. Why do we need systems biology anyway and how does this new area of research promise to change the face of biology in the next couple of decades?

Wiley, H S.

2006-06-01

93

Rabbit System.  

National Technical Information Service (NTIS)

A rabbit system for ultrafast transport of a sampler between a sampling point and an analysis position is described. The sampler is transported pneumatically in a carrier capsule first to a sampling point and then to a separating structure in front of the...

1978-01-01

94

Ventilation systems  

NASA Astrophysics Data System (ADS)

Two different types of ventilation systems and their components are addressed: general ventilation and local or process ventilation. Calculation of the flow rates used in the different systems is addressed. The many different types of flow calculations, how they are used, and some of the computer programs that could be used for these calculations are described. Some calculations start with assumptions regarding air flow rates in rooms and locals. The flow rates can be chosen from rule of thumb or regulations or standards. Thereafter the designer calculates necessary heat and cooling loads, pressure drops, fan effect, etc. The other type of calculation is not very common. By using demands on concentrations, temperatures or air velocities the flow rates are calculated. These calculations include contaminant source generation rates, use of models (physical and theoretical), and computational fluid dynamics. The latter are focused upon.

Olander, L.

95

Burner systems  

DOEpatents

A burner system particularly useful for downhole deployment includes a tubular combustion chamber unit housed within a tubular coolant jacket assembly. The combustion chamber unit includes a monolithic tube of refractory material whose inner surface defines the combustion zone. A metal reinforcing sleeve surrounds and extends the length of the refractory tube. The inner surface of the coolant jacket assembly and outer surface of the combustion chamber unit are dimensioned so that those surfaces are close to one another in standby condition so that the combustion chamber unit has limited freedom to expand with that expansion being stabilized by the coolant jacket assembly so that compression forces in the refractory tube do not exceed about one-half the safe compressive stress of the material; and the materials of the combustion chamber unit are selected to establish thermal gradient parameters across the combustion chamber unit to maintain the refractory tube in compression during combustion system start up and cool down sequences.

Doherty, Brian J. (Marblehead, MA)

1984-07-10

96

Gasification system  

DOEpatents

A method and system for injecting coal and process fluids into a fluidized bed gasification reactor. Three concentric tubes extend vertically upward into the fluidized bed. Coal particulates in a transport gas are injected through an inner tube, and an oxygen rich mixture of oxygen and steam are injected through an inner annulus about the inner tube. A gaseous medium relatively lean in oxygen content, such as steam, is injected through an annulus surrounding the inner annulus.

Haldipur, Gaurang B. (Hempfield, PA); Anderson, Richard G. (Penn Hills, PA); Cherish, Peter (Bethel Park, PA)

1985-01-01

97

Imaging System  

NASA Technical Reports Server (NTRS)

The 1100C Virtual Window is based on technology developed under NASA Small Business Innovation (SBIR) contracts to Ames Research Center. For example, under one contract Dimension Technologies, Inc. developed a large autostereoscopic display for scientific visualization applications. The Virtual Window employs an innovative illumination system to deliver the depth and color of true 3D imaging. Its applications include surgery and Magnetic Resonance Imaging scans, viewing for teleoperated robots, training, and in aviation cockpit displays.

1995-01-01

98

Gasification system  

DOEpatents

A method and system for injecting coal and process fluids into a fluidized bed gasification reactor. Three concentric tubes extend vertically upward into the fluidized bed. Coal particulates in a transport gas are injected through an inner tube, and an oxygen rich mixture of oxygen and steam are injected through an inner annulus about the inner tube. A gaseous medium relatively lean in oxygen content, such as steam, is injected through an annulus surrounding the inner annulus.

Haldipur, Gaurang B. (Hempfield, PA) [Hempfield, PA; Anderson, Richard G. (Penn Hills, PA) [Penn Hills, PA; Cherish, Peter (Bethel Park, PA) [Bethel Park, PA

1983-01-01

99

Adrenergic System  

Microsoft Academic Search

\\u000a The adrenergic system is an essential regulator of cardiovascular, endocrine, neuronal, vegetative, and metabolic function.\\u000a The biological effects of the endogenous catecholamines epinephrine and norepinephrine are mediated by nine distinct G protein-coupled\\u000a receptor subtypes. These adrenergic receptors can be divided into three different groups, the a1-receptors (?1A, ?1B, ?1D), ?2-receptors (?2A, ?2B ?2C) ?-receptors (?1, ?2, ?3). In the absence

S. Engelhardt; L. Hein

100

Bioregenerative system  

NASA Technical Reports Server (NTRS)

The design course is an eight semester credit multi-disciplinary engineering design course taught primarily to Engineering Science, Aerospace, Electrical and Mechanical Engineering seniors. This year the course project involved the design of the three interrelated loops: atmospheric, liquid nutrient and solid waste management, associated with growing higher plants to support man during long-term space missions. The project is complementary to the NASA Kennedy Space Center Controlled Environmental Life Support System (CELSS) project. The first semester the class worked on a preliminary design for a complete system. This effort included means for monitoring and control of composition, temperature, flow rate, etc., for the atmosphere and liquid nutrient solution; disease and contaminant monitoring and control; plant mechanical support, propagation and harvesting; solid and liquid waste recycling; and system maintenance and refurbishing. The project has significant biological, mechanical, electrical and Al/Robotics aspects. The second semester a small number of subsystems or components, identified as important and interesting during the first semester, were selected for detail design, fabrication, and testing. The class was supported by close cooperation with The Kennedy Space Center and by two teaching assistants. The availability of a dedicated, well equipped project room greatly enhanced the communication and team spirit of the class.

1987-01-01

101

Technological Issues and High Gradient Test Results on X-Band Molybdenum Accelerating Structures  

SciTech Connect

Two 11.424 GHz single cell standing wave accelerating structures have been fabricated for high gradient RF breakdown studies. Both are brazed structures: one made from copper and the other from sintered molybdenum bulk. The tests results are presented and compared to those of similar devices constructed at SLAC (Stanford Linear Accelerator Center) and KEK (Ko Enerugi Kasokuki Kenkyu Kiko). The technological issues to build both sections are discussed.

Spataro, B.; /LNF, Dafne Light; Alesini, D.; /LNF, Dafne Light; Chimenti, V.; /LNF, Dafne Light; Dolgashev, V.; /SLAC; Haase, A.; /SLAC; Tantawi, S.G.; /SLAC; Higashi, Y.; /KEK, Tsukuba; Marrelli, C.; /Rome U.; Mostacci, A.; /Rome U.; Parodi, R.; /INFN, Genoa; Yeremian, A.D.; /SLAC

2012-04-24

102

Purification system  

NASA Technical Reports Server (NTRS)

A system for prolonging the life of a granulated activated charcoal (GAC) water treatment device is disclosed in which an ultraviolet light transparent material is used to constrain water to flow over carbon surfaces. It is configured to receive maximum flux from a UV radiation source for the purpose of preventing microbial proliferation on the carbon surfaces; oxidizing organic contaminants adsorbed from the water onto the carbon surfaces and from biodegradation of adsorbed microbial forms; disinfecting water; and oxidizing organic contaminants in the water.

Flanagan, David T. (inventor); Gibbons, Randall E. (inventor)

1992-01-01

103

Relaxation System  

NASA Technical Reports Server (NTRS)

Environ Corporation's relaxation system is built around a body lounge, a kind of super easy chair that incorporates sensory devices. Computer controlled enclosure provides filtered ionized air to create a feeling of invigoration, enhanced by mood changing aromas. Occupant is also surrounded by multidimensional audio and the lighting is programmed to change colors, patterns, and intensity periodically. These and other sensory stimulators are designed to provide an environment in which the learning process is stimulated, because research has proven that while an individual is in a deep state of relaxation, the mind is more receptive to new information.

1987-01-01

104

Balance System  

NASA Technical Reports Server (NTRS)

TherEx Inc.'s AT-1 Computerized Ataxiameter precisely evaluates posture and balance disturbances that commonly accompany neurological and musculoskeletal disorders. Complete system includes two-strain gauged footplates, signal conditioning circuitry, a computer monitor, printer and a stand-alone tiltable balance platform. AT-1 serves as assessment tool, treatment monitor, and rehabilitation training device. It allows clinician to document quantitatively the outcome of treatment and analyze data over time to develop outcome standards for several classifications of patients. It can evaluate specifically the effects of surgery, drug treatment, physical therapy or prosthetic devices.

1988-01-01

105

Sterilization System  

NASA Technical Reports Server (NTRS)

Cox Sterile Products, Inc.'s Rapid Heat Transfer Sterilizer employs a heat exchange process that induces rapid air movement; the air becomes the heat transfer medium, maintaining a uniform temperature of 375 degrees Fahrenheit. It features pushbutton controls for three timing cycles for different instrument loads, a six-minute cycle for standard unpackaged instruments, eight minutes for certain specialized dental/medical instruments and 12 minutes for packaged instruments which can then be stored in a drawer in sterile condition. System will stay at 375 degrees all day. Continuous operation is not expensive because of the sterilizer's very low power requirements.

1990-01-01

106

D0 Cryo System Control System Autodialer  

Microsoft Academic Search

The DO cryogenic system is controlled by a TI565-PLC based control system. This allows the system to be unmanned when in steady state operation. System experts will need to be contacted when system parameters exceed normal operating points and reach alarm setpoints. The labwide FIRUS system provides one alarm monitor and communication link. An autodialer provides a second and more

J. Urbin

1990-01-01

107

Solar System  

NSDL National Science Digital Library

NASA is charting a bold new course into the cosmos, a journey that will take humans back to the Moon, and eventually to Mars and beyond. Exploration of the solar system and beyond will be guided by compelling questions of scientific and societal importance. NASA exploration programs will seek profound answers to questions about the origins of our solar system, whether life exists beyond Earth, and how we could live on other worlds. The NASA Vision for space exploration calls for a combination of human and robotic missions to achieve new exploration goals. Robotic missions to the Moon will be followed by an extended human expedition as early as 2015. Lunar exploration will lay the groundwork for future exploration of Mars and other destinations. A new spacecraft to support these journeys--the Crew Exploration Vehicle--will be tested before the end of this decade. Space exploration holds a special place in the human imagination. Youth are especially drawn to Mars rovers, astronauts, and telescopes. If used effectively and creatively, space can inspire children to seek careers in math, science, and engineering. Exploration and discovery are key agents of growth in society--technologically, economically, socially, internationally, and intellectually. This module is a first step in engaging today's youth in space exploration and serves as an invitation to participate in the excitement of discovery.

National Science Teachers Association (NSTA)

2005-04-01

108

Ternary System  

NASA Astrophysics Data System (ADS)

Piezoelectric ceramics in the PbSnO3-PbZrO3-PbTiO3 (PZST) ternary system with pure perovskite structure were synthesized by a conventional solid state reaction method with the compositions near the morphotropic phase boundary (MPB). The influences of Sn content on dielectric, piezoelectric, and ferroelectric properties of Pb(Zr x Sn y Ti1- x- y )O3 ceramics were investigated. The experimental results showed that, with increasing the Sn content along the Ti = 0.48 line, the optimized sintering temperature, tetragonality, and Curie temperature ( T C) decreased monotonically. The polarization-electric field hysteresis loops show a pinning effect in some low Sn compositions. Frequency dependence of the pinning effect was studied accompanied with current-electric field curve analysis. The PZST compositions near MPB show promising advantages for practical applications.

Xing, Zhuo; Jin, Li; Feng, Yujun; Wei, Xiaoyong

2014-07-01

109

Photopolymer Systems  

NASA Astrophysics Data System (ADS)

Photopolymers, in the context of this chapter, are systems of organic molecules that rely on photoinitiated polymerization to record volume phase holograms. Characteristics such as good light sensitivity, real-time image development, large dynamic range, good optical properties, format flexibility, good image stability, and relatively low cost make photopolymers one of the most promising materials for write-once, read-many (WORM) holographic data storage applications. We first present a brief description of the chemistry of photopolymers. This is followed by a discussion of photopolymer properties that are particularly relevant to the requirements of recording holograms for data storage. The intent of this chapter is to provide the nonspecialist with an appreciation of the possibilities and promise offered by photopolymers as candidate materials for holographic data storage, and to highlight areas where additional material development is desired. Readers interested in other aspects of photopolymers in holography can consult reviews by Lessard and Manivannan [1], Lougnot [2], and Colburn [3].

Ingwall, R. T.; Waldman, D.

110

Transfer system  

SciTech Connect

A transport system includes a traveling rail (1) which constitutes a transport route and a transport body (3) which is capable of traveling on the traveling rail in the longitudinal direction of the traveling rail. Flexible drive tubes (5) are arranged on the traveling rail in the longitudinal direction of the traveling rail. The transport body includes a traveling wheel (4) which is capable of rolling on the traveling rail and drive wheels (2) which are capable of rolling on the drive tubes upon receiving the rotational drive power generated by pressure of a pressure medium supplied to the drive tubes while depressing the drive tubes. The traveling rail includes a plurality of transport sections and the transport body is capable of receiving a rotational drive force from the drive tubes at every transport sections. If necessary, a transport route changeover switch which changes over the transport route can be provided between the transport sections.

Kurosawa, Kanji (Tokyo, JP); Koga, Bunichiro (Miyagi, JP); Ito, Hideki (Miyagi, JP); Kiriyama, Shigeru (Miyagi, JP); Higuchi, Shizuo (Kanagawa, JP)

2003-05-20

111

Intelligent Engine Systems: Bearing System  

NASA Technical Reports Server (NTRS)

The overall requirements necessary for sensing bearing distress and the related criteria to select a particular rotating sensor were established during the phase I. The current phase II efforts performed studies to evaluate the Robustness and Durability Enhancement of the rotating sensors, and to design, and develop the Built-in Telemetry System concepts for an aircraft engine differential sump. A generic test vehicle that can test the proposed bearing diagnostic system was designed, developed, and built. The Timken Company, who also assisted with testing the GE concept of using rotating sensors for the differential bearing diagnostics during previous phase, was selected as a subcontractor to assist General Electric (GE) for the design, and procurement of the test vehicle. A purchase order was prepared to define the different sub-tasks, and deliverables for this task. The University of Akron was selected to provide the necessary support for installing, and integrating the test vehicle with their newly designed test facility capable of simulating the operating environment for the planned testing. The planned testing with good and damaged bearings will be on hold pending further continuation of this effort during next phase.

Singh, Arnant P.

2008-01-01

112

Space Station propulsion system  

NASA Astrophysics Data System (ADS)

Viewgraphs on space station propulsion systems are presented. Topics covered include: space station propulsion system requirements; space station propulsion system design; space station propulsion system drivers; hydrazine technology development; waste fluid disposal system; space station propulsion system evolution; propellant selection trade study; technology needs to water electrolysis/oxygen-hydrogen propulsion system; and technology needs for bipropellant systems.

Henderson, J.

113

Separation system  

DOEpatents

A separation system for dewatering radioactive waste materials includes a disposal container, drive structure for receiving the container, and means for releasably attaching the container to the drive structure. Separation structure disposed in the container adjacent the inner surface of the side wall structure retains solids while allowing passage of liquids. Inlet port structure in the container top wall is normally closed by first valve structure that is centrifugally actuated to open the inlet port and discharge port structure at the container periphery receives liquid that passes through the separation structure and is normally closed by second valve structure that is centrifugally actuated to open the discharge ports. The container also includes coupling structure for releasable engagement with the centrifugal drive structure. Centrifugal force produced when the container is driven in rotation by the drive structure opens the valve structures, and radioactive waste material introduced into the container through the open inlet port is dewatered, and the waste is compacted. The ports are automatically closed by the valves when the container drum is not subjected to centrifugal force such that containment effectiveness is enhanced and exposure of personnel to radioactive materials is minimized.

Rubin, Leslie S. (Newton, MA)

1986-01-01

114

System safety education focused on system management  

NASA Technical Reports Server (NTRS)

System safety is defined and characteristics of the system are outlined. Some of the principle characteristics include role of humans in hazard analysis, clear language for input and output, system interdependence, self containment, and parallel analysis of elements.

Grose, V. L.

1971-01-01

115

Mass Storage System Reference Model System Management.  

National Technical Information Service (NTIS)

System Management is the collection of functions that are primarily concerned with the control, performance and utilization of the Mass Storage System defined by the Mass Storage System Reference Model. These functions are often very site-dependent, invol...

B. Collins T. McLarty

1988-01-01

116

Distinguishing Systemic from Systematic.  

ERIC Educational Resources Information Center

Describes the difference between systemic and systematic as they relate to school reform and instructional design. Highlights include a history of systems theory; systems engineering; instructional systems design; systemic versus reductionist thinking; social systems; and systemic change in education, including power relationships. (LRW)

Carr, Alison A.

1996-01-01

117

Hybrid System Modeling and Autonomous Control Systems  

Microsoft Academic Search

Hybrid control systems contain two distinct types of systems, continuous state and discrete-state, that interact with each other. Their study is essential in designing sequential supervisory controllers for continuous-state systems, and it is central in designing control systems with high degree of autonomy.

Panos J. Antsaklis; James A. Stiver; Michael D. Lemmon

1992-01-01

118

The complement system in systemic autoimmune disease  

Microsoft Academic Search

Complement is part of the innate immune system. Its major function is recognition and elimination of pathogens via direct killing and\\/or stimulation of phagocytosis. Activation of the complement system is, however, also involved in the pathogenesis of the systemic autoimmune diseases. Activation via the classical pathway has long been recognized in immune complex-mediated diseases such as cryoglobulinemic vasculitis and systemic

Min Chen; Mohamed R. Daha; Cees G. M. Kallenberg

2010-01-01

119

System on Chip or System on Package?  

Microsoft Academic Search

The authors propose a new system design paradigm, the system on package, which uses electronic product reengineering to meet time-to-market and performance requirements. The system on package promises a higher return on investment than the system on chip

Rao R. Tummala; Vijay K. Madisetti

1999-01-01

120

System design description cone penetrometer system  

SciTech Connect

The system design description documents in detail the design of the cone penetrometer system. The systems includes the cone penetrometer physical package, raman spectroscopy package and moisture sensor package. Information pertinent to the system design, development, fabrication and testing is provided.

Seda, R.Y., Westinghouse Hanford

1996-08-12

121

System engineering for the 777 autopilot system  

Microsoft Academic Search

This paper describes the systems engineering process used in developing the 777 Autopilot Flight Director System (AFDS). It includes discussions regarding requirements capture, requirements allocation to hardware and software, system architecture considerations (including the architectural impact of safety requirements), change management, requirements and verification traceability, and requirements-based verification. Additionally, the organizational structure employed and its interaction with the systems engineering

M. J. Gries

1997-01-01

122

D0 Cryo System Control System Autodialer  

SciTech Connect

The DO cryogenic system is controlled by a TI565-PLC based control system. This allows the system to be unmanned when in steady state operation. System experts will need to be contacted when system parameters exceed normal operating points and reach alarm setpoints. The labwide FIRUS system provides one alarm monitor and communication link. An autodialer provides a second and more flexible alarm monitor and communication link. The autodialer monitors contact points in the control system and after receiving indication of an alarm accesses a list of experts which it calls until it receives an acknowledgement. There are several manufacturers and distributors of autodialer systems. This EN explains the search process the DO cryo group used to fmd an autodialer system that fit the cryo system's needs and includes information and specs for the unit we chose.

Urbin, J.; /Fermilab

1990-04-17

123

Mass storage system reference model system management  

SciTech Connect

System Management is the collection of functions that are primarily concerned with the control, performance and utilization of the Mass Storage System defined by the Mass Storage System Reference Model. These functions are often very site-dependent, involve human decision making, and span multiple ''severs'' of the Mass Storage System. The functions may be implemented as standalone programs, may be integrated with the other Mass Storage System software, or may just be policy. 4 refs.

Collins, B.; McLarty, T.

1988-01-01

124

Open Systems (Architecture) Engineering.  

National Technical Information Service (NTIS)

Overview of this document: discussion of key open system concepts and definitions, conformance and compatibility management, open system engineering approach, open system policy, today's transition environment and open system transition process.

N. W. Kowalski

1996-01-01

125

Mechanical systems: A compilation  

NASA Technical Reports Server (NTRS)

A compilation of several mechanized systems is presented. The articles are contained in three sections: robotics, industrial mechanical systems, including several on linear and rotary systems and lastly mechanical control systems, such as brakes and clutches.

1975-01-01

126

Hybrid Navigation Systems.  

National Technical Information Service (NTIS)

Contents: Hybrid guidance and navigation systems; Characteristics of a satellite navigation system operated in conjunction with a user inertial system; Global navigation/traffic surveillance/communication satellite system for military and civil vehicles; ...

G. R. Marner, B. P. Leonard, M. W. Mitchell, F. S. Stringer, M. G. Pearson

1970-01-01

127

System Design Specification Brayton Isotope Power System (BIPS) Flight System (FS), and Ground Demonstration System (GDS).  

National Technical Information Service (NTIS)

The system design specification for ground demonstration, development, and flight qualification of a Brayton Isotope Power System (BIPS) is presented. The requirements for both a BIPS conceptual Flight System (FS) and a Ground Demonstration System (GDS) a...

1976-01-01

128

The V distributed system  

Microsoft Academic Search

The V distributed System was developed at Stanford University as part of a research project to explore issues in distributed systems. Aspects of the design suggest important directions for the design of future operating systems and communication systems.

David R. Cheriton

1988-01-01

129

A Stimuli Presentation System.  

National Technical Information Service (NTIS)

Laboratory and research field trip requirements have revealed the need for a programmable audio switching system. This system, the stimuli presentation system (SPS), is designed with general versatility in mind. Although the system was conceived for use i...

W. D. Harrington H. Hollien H. Rothman

1969-01-01

130

Expert systems in transportation  

SciTech Connect

The 5 papers in the report deal with the following areas: Knowledge representation and software selection for expert-systems design; Expert-system architecture for retaining-wall design; Development of expert-systems technology in the California Department of Transportation; Development of an expert system to assist in the interactive graphic transit system design process; Expert systems development for contingency transportation planing.

O'Leary, K.P.

1988-01-01

131

Serverless network file systems  

Microsoft Academic Search

We propose a new paradigm for network file system design: serverless network file systems. While traditional network file systems rely on a central server machine, a serverless system utilizes workstations cooperating as peers to provide all file system services. Any machine in the system can store, cache, or control any block of data. Our approach uses this location independence, in

Thomas E. Anderson; Michael D. Dahlin; Jeanna M. Neefe; David A. Patterson; Drew S. Roselli; Randolph Y. Wang

1996-01-01

132

Serverless Network File Systems  

Microsoft Academic Search

In this paper, we propose a new paradigm for network file system design, serverless network file systems. While traditional network file systems rely on a central server machine, a serverless system utilizes workstations cooperating as peers to provide all file system services. Any machine in the system can store, cache, or control any block of data. Our approach uses this

Thomas E. Anderson; Michael Dahlin; Jeanna M. Neefe; David A. Patterson; Drew S. Roselli; Randolph Y. Wang

1995-01-01

133

Modular robot system architecture  

Microsoft Academic Search

In comparison with dedicated robot systems, the main goal of modular robot systems is to achieve system adaptability by providing various modular configuration variations to meet possible task requirements. System architecture determines the system configuration variations, as the architecture specifies primary building blocks and the types of ways they are connected. In order to make systems more adaptive, configuration variations

Z. M. Bi; W. J. Zhang; Sherman Y. T. Lang

2002-01-01

134

System of systems modeling and analysis.  

SciTech Connect

This report documents the results of an LDRD program entitled 'System of Systems Modeling and Analysis' that was conducted during FY 2003 and FY 2004. Systems that themselves consist of multiple systems (referred to here as System of Systems or SoS) introduce a level of complexity to systems performance analysis and optimization that is not readily addressable by existing capabilities. The objective of the 'System of Systems Modeling and Analysis' project was to develop an integrated modeling and simulation environment that addresses the complex SoS modeling and analysis needs. The approach to meeting this objective involved two key efforts. First, a static analysis approach, called state modeling, has been developed that is useful for analyzing the average performance of systems over defined use conditions. The state modeling capability supports analysis and optimization of multiple systems and multiple performance measures or measures of effectiveness. The second effort involves time simulation which represents every system in the simulation using an encapsulated state model (State Model Object or SMO). The time simulation can analyze any number of systems including cross-platform dependencies and a detailed treatment of the logistics required to support the systems in a defined mission.

Campbell, James E.; Anderson, Dennis James; Longsine, Dennis E. (Intera, Inc., Austin, TX); Shirah, Donald N.

2005-01-01

135

System Software Framework for System of Systems Avionics  

NASA Technical Reports Server (NTRS)

Project Constellation implements NASA's vision for space exploration to expand human presence in our solar system. The engineering focus of this project is developing a system of systems architecture. This architecture allows for the incremental development of the overall program. Systems can be built and connected in a "Lego style" manner to generate configurations supporting various mission objectives. The development of the avionics or control systems of such a massive project will result in concurrent engineering. Also, each system will have software and the need to communicate with other (possibly heterogeneous) systems. Fortunately, this design problem has already been solved during the creation and evolution of systems such as the Internet and the Department of Defense's successful effort to standardize distributed simulation (now IEEE 1516). The solution relies on the use of a standard layered software framework and a communication protocol. A standard framework and communication protocol is suggested for the development and maintenance of Project Constellation systems. The ARINC 653 standard is a great start for such a common software framework. This paper proposes a common system software framework that uses the Real Time Publish/Subscribe protocol for framework-to-framework communication to extend ARINC 653. It is highly recommended that such a framework be established before development. This is important for the success of concurrent engineering. The framework provides an infrastructure for general system services and is designed for flexibility to support a spiral development effort.

Ferguson, Roscoe C.; Peterson, Benjamin L; Thompson, Hiram C.

2005-01-01

136

Intelligent systems technology infrastructure for integrated systems  

NASA Technical Reports Server (NTRS)

Significant advances have occurred during the last decade in intelligent systems technologies (a.k.a. knowledge-based systems, KBS) including research, feasibility demonstrations, and technology implementations in operational environments. Evaluation and simulation data obtained to date in real-time operational environments suggest that cost-effective utilization of intelligent systems technologies can be realized for Automated Rendezvous and Capture applications. The successful implementation of these technologies involve a complex system infrastructure integrating the requirements of transportation, vehicle checkout and health management, and communication systems without compromise to systems reliability and performance. The resources that must be invoked to accomplish these tasks include remote ground operations and control, built-in system fault management and control, and intelligent robotics. To ensure long-term evolution and integration of new validated technologies over the lifetime of the vehicle, system interfaces must also be addressed and integrated into the overall system interface requirements. An approach for defining and evaluating the system infrastructures including the testbed currently being used to support the on-going evaluations for the evolutionary Space Station Freedom Data Management System is presented and discussed. Intelligent system technologies discussed include artificial intelligence (real-time replanning and scheduling), high performance computational elements (parallel processors, photonic processors, and neural networks), real-time fault management and control, and system software development tools for rapid prototyping capabilities.

Lum, Henry, Jr.

1991-01-01

137

Neko EER (Erekutorikari Ebokuto Resuponsu) No Kisoteki Kenkyu: 17, 18 YA Hishitsu Ni Okeru EER No Nyuron Kigen No Kenkyu (Analysis of the Electrically Evoked Response (EER) of the Cat).  

National Technical Information Service (NTIS)

Phosphene is a sense obtained by electric stimulus of eyeball, and it can be applied as an evoked potential in the brain. The basic pulses of EER (Electricaly Evoked Response) and responses of a single neuron in the area 17 and 18 of the cerebral cortex w...

K. Shimazu Y. Miyake Y. Fukatsu S. Watanabe

1993-01-01

138

Denshi Gijitsu Sogo Kenkyusho Kenkyu Hokoku, Dai 53 Go: Sanrantai O Fukumu Nensho Gasu Kara No Supekutoru Hosha Ni Kansuru Kenkyu (Researches of the Electrotechnical Laboratory. No. 53: Spectral Emission from Combustion Gas Containing Scattering Media).  

National Technical Information Service (NTIS)

The spherical harmonics (P(sub N)) approximation of radiative transfer equation, which is mathematically rigorous and can take into account of anisotropical scattering, is extended to a case where radiative properties are variable in a three-dimensional e...

K. Onda

1993-01-01

139

Evolving Information Systems: Beyond Temporal Information Systems.  

National Technical Information Service (NTIS)

The need for information systems which are capable of evolving to the same extent as organizations do is discussed. Requirements of evolving organizations on their information systems are identified, and this is followed by alternative approaches to adequ...

E. D. Falkenberg J. L. H. Oei H. A. Proper

1992-01-01

140

Language as a System of Systems  

ERIC Educational Resources Information Center

Based on Mulder's previous classification of all semiotic systems designed to describe the system of discrete features in human languages, this article explores a further subclassification of the genus language into species. (CLK)

Mulder, J. W. F.; Hervey, S. G. J.

1975-01-01

141

Integrated Systems Health Management for Intelligent Systems.  

National Technical Information Service (NTIS)

The implementation of an integrated system health management (ISHM) capability is fundamentally linked to the management of data, information, and knowledge (DIaK) with the purposeful objective of determining the health of a system. Management implies sto...

F. Figueroa K. Melcher

2011-01-01

142

Freedom System Text and Graphics System (TAGS)  

NASA Technical Reports Server (NTRS)

The Text and Graphics System (TAGS) is a high-resolution facsimile system that scans text or graphics material and converts the analog SCAN data into serial digital data. This video shows the TAGS in operation.

1989-01-01

143

Stellar systems as dissipative dynamical systems  

SciTech Connect

The evolution of a stellar system containing a massive central body is investigated by the methods of the theory of dynamical systems and catastrophe theory. The problem is reduced to the study of a two-dimensional dissipative system - a simple attractor. The presence of stable and unstable singular points (nodes and focuses) and cycles is shown. In the system there may be subcritical and supercritical Hopf bifurcations with a separatrix corresponding to a symmetric butterfly catastrophe of type A..mu..- 5.

Gurzadyan, V.G.; Kocharyan, A.A.

1987-09-01

144

An Operating System Independent WORM Archival System  

Microsoft Academic Search

SUMMARY We describe the organization of a general purpose data archival system for Write-Once, Read-Many (WORM) optical disks. The system has been designed for large-scale and long-term data storage and retrieval. The archival system is independent of the operating system, flat, self-consistent, does not use any write cache on magnetic disk, and allows the exploitation of auxiliary information on magnetic

Guido Russo; Stefano Russo

1995-01-01

145

Systems of systems and coordinated atomic actions  

Microsoft Academic Search

System of systems (SoS) is an emerging field in the design and development of complex systems that are built from large scale component systems. A SoS has the following attributes: operational and managerial independence of components, a geographic extent that limits control mechanisms to information exchange, an evolutionary nature, and emergent behavior. The subsystems that comprise the SoS often are

Robert Schaefer

2005-01-01

146

Intelligent tutoring systems for systems engineering methodologies  

NASA Technical Reports Server (NTRS)

The general goal is to provide the technology required to build systems that can provide intelligent tutoring in IDEF (Integrated Computer Aided Manufacturing Definition Method) modeling. The following subject areas are covered: intelligent tutoring systems for systems analysis methodologies; IDEF tutor architecture and components; developing cognitive skills for IDEF modeling; experimental software; and PC based prototype.

Meyer, Richard J.; Toland, Joel; Decker, Louis

1991-01-01

147

System Design of the SWRL Financial System.  

ERIC Educational Resources Information Center

To produce various management and accounting reports in order to maintain control of SWRL (Southwest Regional Laboratory) operational and financial activities, a computer-based SWRL financial system was developed. The system design is outlined, and various types of system inputs described. The kinds of management and accounting reports generated…

Ikeda, Masumi

148

General Systems Theory and Instructional Systems Design.  

ERIC Educational Resources Information Center

Describes basic concepts in the field of general systems theory (GST) and identifies commonalities that exist between GST and instructional systems design (ISD). Models and diagrams that depict system elements in ISD are presented, and two matrices that show how GST has been used in ISD literature are included. (11 references) (LRW)

Salisbury, David F.

1990-01-01

149

Energy Systems Design  

NASA Technical Reports Server (NTRS)

PRESTO, a COSMIC program, handles energy system specifications and predicts design efficiency of cogeneration systems. These systems allow a company to use excess energy produced to generate electricity. PRESTO is utilized by the Energy Systems Division of Thermo Electron Corporation in the custom design of cogeneration systems.

1986-01-01

150

FNAL system patching design  

Microsoft Academic Search

FNAL has over 5000 PCs running either Linux or Windows software. Protecting these systems efficiently against the latest vulnerabilities that arise has prompted FNAL to take a more central approach to patching systems. Due to different levels of existing support infrastructures, the patching solution for linux systems differs from that of windows systems. In either case, systems are checked for

Jack Schmidt; Al Lilianstrom; Andy Romero; Troy Dawson; Connie Sieh

2004-01-01

151

Naval shipboard power system  

Microsoft Academic Search

Different naval shipboard power system architectures and their basic characteristics have been discussed in the paper. In addition the paper discusses about incorporation of platform management systems into the ship automation system that would enable monitoring and control of the shipboard power system, assessing and diagnosing system failures\\/damages and reconfiguring and restoring power to service loads with reduced manpower and

R. Jayabalan; B. Fahimi

2005-01-01

152

Intelligent test integration system  

NASA Technical Reports Server (NTRS)

A new test technology is described which was developed for space system integration. The ultimate purpose of the system is to support the automatic generation of test systems in real time, distributed computing environments. The Intelligent Test Integration System (ITIS) is a knowledge based layer above the traditional test system components which can generate complex test configurations from the specification of test scenarios.

Sztipanovits, J.; Padalkar, S.; Rodriguez-Moscoso, J.; Kawamura, K.; Purves, B.; Williams, R.; Biglari, H.

1988-01-01

153

Heliospheric coordinate systems  

Microsoft Academic Search

This article gives an overview and reference to the most common coordinate systems currently used in space science. While coordinate systems used in near-Earth space physics have been described in previous work we extend that description to systems used for physical observations of the Sun and the planets and to systems based on spacecraft location. For all systems, we define

M. Fränz; D. Harper

2002-01-01

154

Manager's assistant systems for space system planning  

NASA Technical Reports Server (NTRS)

This paper describes a class of knowledge-based 'assistant' systems for space system planning. Derived from technology produced for the DARPA/USAF Pilot's Associate program, these assistant systems help the human planner by doing the bookkeeping to maintain plan data and executing the procedures and heuristics currently used by the human planner to define, assess, diagnose, and revise plans. Intelligent systems for Space Station Freedom assembly sequence planning and Advanced Launch System modeling will be presented as examples. Ongoing NASA-funded work on a framework supporting the development of such tools will also be described.

Bewley, William L.; Burnard, Robert; Edwards, Gary E.; Shoop, James

1992-01-01

155

DDL system: Design systhesis of digital systems  

NASA Technical Reports Server (NTRS)

Digital Systems Design Language was integrated into the CADAT system environment of NASA-MSFC. The major technical aspects of this integration are summarized. Automatic hardware synthesis is now possible starting with a high level description of the system to be synthesized. The DDL system provides a high level design verification capability, thereby minimizing design changes in the later stages of the design cycle. An overview of the DDL system covering the translation, simulation and synthesis capabilities is provided. Two companion documents (the user's and programmer's manuals) are to be consulted for detailed discussions.

Shiva, S. G.

1983-01-01

156

Microwave landing system autoland system analysis  

NASA Technical Reports Server (NTRS)

The objective was to investigate the ability of present day aircraft equipped with automatic flight control systems to fly advanced Microwave Landing Systems (MLS) approaches. The tactical approach used to achieve this objective included reviewing the design and autoland operation of the MD-80 aircraft, simulating the MLS approaches using a batch computer program, and assessing the performance of the autoland system from computer generated data. The results showed changes were required to present Instrument Landing System (ILS) procedures to accommodate the new MLS curved paths. It was also shown that in some cases, changes to the digital flight guidance systems would be required so that an autoland could be performed.

Feather, J. B.; Craven, B. K.

1991-01-01

157

Systems biology approach to developing "systems therapeutics".  

PubMed

The standard drug development model uses reductionist approaches to discover small molecules targeting one pathway. Although systems biology analyzes multiple pathways, the approach is often used to develop a small molecule interacting at only one pathway in the system. Similar to that in physics where a departure from the old reductionist "Copenhagen View" of quantum physics to a new and predictive systems based, collective model has emerged yielding new breakthroughs such as the LASER, a new model is emerging in biology where systems biology is used to develop a new technology acting at multiple pathways called "systems therapeutics." PMID:24900858

Maguire, Greg

2014-05-01

158

Koon sainetsu nenshoki kenkyu kaihatsu yo tei sanso nensho shiken sochi. (Low oxygen combustion tester for high temperature reheat combustors).  

National Technical Information Service (NTIS)

As a part of the development of high efficiency reheat cycle gas turbines, the combustion tester capable of testing under various oxygen content conditions at a combuster inlet was developed, to examine the flame holding, combustion and emission character...

1989-01-01

159

Kinzokukei Zairyo Kaihatsu Ni Tomonau Bunsekiho No Kakuritsu Ni Kansuru Kenkyu (Study on Analyzing Method Establishment for Metallic Material Development).  

National Technical Information Service (NTIS)

Research was conducted on the inductively coupled plasma (ICP) emission spectrometry and the graphite furnace atomic absorption spectrometry as means for atomic spectrometry. For the ICP emission spectrometry, simultaneous determination of hydride compone...

H. Okouchi O. Kujirai F. Hirose M. Kori S. Suzuki

1993-01-01

160

Genshiryoku anzensei kenkyu no genjo, 1994 nen. (Present status of nuclear power safety studies in JAERI, 1994).  

National Technical Information Service (NTIS)

Securing safety in the development and utilization of nuclear power is the prerequisite, and in order to maintain the safety of nuclear power facilities at level corresponding to the expansion and diversification of nuclear power development and utilizati...

1994-01-01

161

Futaroshianin Sakutai Ni Yoru Shingosei Gijutsu Ni Kansuru Kiso Kenkyu (Fundamental Study on New Synthetic Technology by Phthalocyanine Complexes).  

National Technical Information Service (NTIS)

Bis(tetra t-butylphthalocyaninato) praseodymium (3) and Pr(sup t)Pc2 (Pr = praseodymium, Pc = phthalocianine) were composed as a mixture of multiple isomers by heating a mixture of 4-t-butyl phthalonitrile and praseodymium acetate at 300 C. Bis(tetra t-bu...

H. Isago Y. Kagaya R. Hasegawa

1993-01-01

162

Dai 94 kai cokes tokubetsukai. Kenkyu happyo yoshishu (1994). (94th Coke Conference. Proceedings of the study reports (1994)).  

National Technical Information Service (NTIS)

The paper contains 11 reports made at the 94th Coke Conference held by the Coke Division of the Japan Institute of Energy. The main themes are as follows: 'Effects of heating rate on coal carbonization' which aims at using low-grade coal and at making cok...

1994-01-01

163

Dai 84 kai kokusu tokubetsukai kenkyu happyo yoshishu (1988). Special meeting on coke (84th). Abstracts (1988).  

National Technical Information Service (NTIS)

This document includes abstracts of research works presented at the 84th special meeting on coke. The special lecture was on the development of fuel cells, especially on the progress of phosphoric acid fuel cell and the expectation of its practical applic...

1988-01-01

164

Dai 85 kai kokusu tokubetsukai kenkyu happyo yoshishu (1988). (Proceedings of Special Coke Meeting in (85th). 1988).  

National Technical Information Service (NTIS)

The invited paper and 11 research papers are included, which were presented at the 85th Special Coke Meeting, Coke Group, Nenryo kyokai opened in Oct., 1988. As the invited paper, ''Production and utilization of blast furnace coke in the future'' is print...

1988-01-01

165

Dai kai kokusu tokubetsukai (86th). Kenkyu happyo yoshishu (1989). (Coke special lecture (86th). Proceedings (1986)).  

National Technical Information Service (NTIS)

This papers is the preceedings of the 86th coke special lecture held by coke comittee, Fuel Society of Japan, on April, 1989. The announced lectures were seven researchs and two special lectures by the guests. The outline of the lectures are as follows: F...

1989-01-01

166

systems of linear equations  

NSDL National Science Digital Library

Solve a system of linear equations by graphing and finding the intersection of the lines of the equations. Create a system of equations, examine its graph, matrix, and table of values, and determine the solution of the system.

Exploremath.com; Sharp, Brian

2001-01-01

167

Steam System Survey Guide.  

National Technical Information Service (NTIS)

This Steam System Survey Guide provides technical information for steam system operational personnel and plant energy managers on some of the major opportunities available to improve the energy efficiency and productivity of industrial steam systems. The ...

G. Harrell

2001-01-01

168

Multimode ergometer system  

NASA Technical Reports Server (NTRS)

System overcomes previous ergometer design and calibration problems including inaccurate measurements, large weight, size, and input power requirements, poor heat dissipation, high flammability, and inaccurate calibration. Device consists of lightweight, accurately controlled ergometer, restraint system, and calibration system.

Bynum, B. G.; Gause, R. L.; Spier, R. A.

1971-01-01

169

Power System Stability.  

National Technical Information Service (NTIS)

The following papers are included: exact Lagrangians for linear nonconservative systems; linear nonconservative systems with asymmetric parameters derivable from a Lagrangian; some remarks on the derivability of linear nonconservative systems from a Lagra...

1984-01-01

170

Systemic Lupus Erythematosus  

MedlinePLUS

newsletter | contact Share | Systemic Lupus Erythematosus Information for adults A A A This image displays the red, slightly scaly, and elevated lesions on the cheeks and nose in systemic lupus erythematosus. Overview Systemic lupus erythematosus (SLE), also called ...

171

University Examination System.  

National Technical Information Service (NTIS)

A computer based information system called UNIVERSITY EXAMINATION SYSTEM has been developed for Quaid-i-Azam University (QAU). The system provides efficient means of data storage and retrieval through a variety of fields. During the storage of information...

S. H. Siddiqui

1991-01-01

172

Unlocking the Endocrine System  

NSDL National Science Digital Library

Students learn how the endocrine system works and compare it to the mail delivery system. Students discuss the importance of communication in human body systems and relate that to engineering and astronauts.

Integrated Teaching And Learning Program

173

Lim Guidance Control Systems.  

National Technical Information Service (NTIS)

The feasibility of control systems for positioning the LIM with respect to the reaction rail without physical contact is examined. Preliminary design analyses are made for several representative systems. Systems for use with both a ferrous or composite re...

J. D. Muhlenberg

1970-01-01

174

Space Shuttle Avionics System.  

National Technical Information Service (NTIS)

The Space Shuttle avionics system, which was conceived in the early 1970's and became operational in the 1980's represents a significant advancement of avionics system technology in the areas of systems and redundacy management, digital data base technolo...

J. F. Hanaway R. W. Moorehead

1989-01-01

175

Lesson 44: Nonlinear Systems  

NSDL National Science Digital Library

Using a cost/revenue application problem, the lesson begins with systems involving quadratic equations. Systems with conics are introduced next along with the elimination method for solving these systems.

2011-01-01

176

The Data System.  

National Technical Information Service (NTIS)

This thesis presents the DATA (Dynamic Alerting Transaction Analysis) System as an alternative to a conventional database management system. The DATA System contains no records corresponding to entities but rather is simply a time ordered list of transact...

K. A. Kimball

1978-01-01

177

Maglev systems development status  

Microsoft Academic Search

The current status and future potential of Maglev systems is reviewed. Modes of noncontact suspension and propulsion are described, and prototype systems and design concepts are indicated. A number of existing systems are described in more detail

A. R. Eastham; W. F. Hayes

1988-01-01

178

What Are Expert Systems?  

ERIC Educational Resources Information Center

Intended for potential business users, this paper describes the main characteristics of expert systems; discusses practical use considerations; presents a taxonomy of the systems; and reviews several expert system development projects in business and industry. (MBR)

d'Agapeyeff, A.

1986-01-01

179

Immune System (For Parents)  

MedlinePLUS

... immune system is the body's defense against infectious organisms and other invaders. Through a series of steps called the immune response, the immune system attacks organisms and substances that invade body systems and cause ...

180

Wind energy systems  

NASA Technical Reports Server (NTRS)

A discussion on wind energy systems involved with the DOE wind energy program is presented. Some of the problems associated with wind energy systems are discussed. The cost, efficiency, and structural design of wind energy systems are analyzed.

Stewart, H. J.

1978-01-01

181

Hybrid Image Processing System.  

National Technical Information Service (NTIS)

A hybrid optical/digital image processing system has been developed for an ongoing research program in hybrid image processing. This system is described and its capabilities and limitations are discussed. Major system components include a coherent optical...

T. H. May J. A. Blodgett

1980-01-01

182

Intelligent Test Integration System.  

National Technical Information Service (NTIS)

A new test technology is described which was developed for space system integration. The ultimate purpose of the system is to support the automatic generation of test systems in real time, distributed computing environments. The Intelligent Test Integrati...

J. Sztipanovits S. Padalkar J. Rodriguez-Moscoso K. Kawamura B. Purves

1988-01-01

183

The Solar System  

NSDL National Science Digital Library

Identify basic components of our solar system, including the sun, planets, and Earth's moon. We have just learned about the Solar System. Click here to watch an informational overview of the Solar System: Overview of the Solar System.. The planets in our Solar System are: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune, Pluto. Every planet in our Solar System revolves around the sun. The sun provides the energy ...

Smithson, Ms.

2009-07-07

184

System status display information  

NASA Technical Reports Server (NTRS)

The system Status Display is an electronic display system which provides the flight crew with enhanced capabilities for monitoring and managing aircraft systems. Guidelines for the design of the electronic system displays were established. The technical approach involved the application of a system engineering approach to the design of candidate displays and the evaluation of a Hernative concepts by part-task simulation. The system engineering and selection of candidate displays are covered.

Summers, L. G.; Erickson, J. B.

1984-01-01

185

Photovoltaic systems performance experience  

NASA Astrophysics Data System (ADS)

The photovoltaic power systems at Natural Bridges National Monument in southeastern Utah and at radio station WBNO in Bryan, Ohio, provided reliability experience and case histories on failures and repairs of large photovoltaic systems. The PV systems are used for illustration of potential sources of system outages and measures that can be taken to improve the reliability and repair economy of present and future PV systems. Both systems have experienced lighting strikes, and the results are reported.

Solman, F. J.

1981-08-01

186

Propulsion Systems Panel deliberations  

NASA Technical Reports Server (NTRS)

The Propulsion Systems Panel was established because of the specialized nature of many of the materials and structures technology issues related to propulsion systems. This panel was co-chaired by Carmelo Bianca, MSFC, and Bob Miner, LeRC. Because of the diverse range of missions anticipated for the Space Transportation program, three distinct propulsion system types were identified in the workshop planning process: liquid propulsion systems, solid propulsion systems and nuclear electric/nuclear thermal propulsion systems.

Bianca, Carmelo J.; Miner, Robert; Johnston, Lawrence M.; Bruce, R.; Dennies, Daniel P.; Dickenson, W.; Dreshfield, Robert; Karakulko, Walt; Mcgaw, Mike; Munafo, Paul M.

1993-01-01

187

Control system design method  

DOEpatents

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)

2012-02-21

188

Computer system isolates faults  

SciTech Connect

Maintaining transaction processing systems in continuous operation, a minicomputer system made by tolerant systems detects and isolates faults, then transfers work loads to the appropriate backup resource. An eternity system is actually 1 to 15 computer systems, called system building blocks, interconnected by a communication network. Modularity is provided by tolerant's flexible architecture technique. This allows a user to expand system capacity with nondedicated computers which can be assigned to tasks such as increasing processing power, user accessibility and database size as dictated by needs. The loosely-coupled nature of the system increases reliability.

Hall, D.E.

1983-11-01

189

Automated surface observing systems  

NSF Publications Database

Title : Automated surface observing systems Type : Antarctic EAM NSF Org: OD / OPP Date : August 19 ... Action Memorandum (Installation of Automated Surface Observing Systems [ASOS}) To: Director, Office ...

190

Systemic lupus erythematosus  

MedlinePLUS

Disseminated lupus erythematosus; SLE; Lupus; Lupus erythematosus; Discoid lupus ... Systemic lupus erythematosus (SLE) is an autoimmune disease in which the body's immune system mistakenly attacks healthy tissue. It ...

191

Lightside Atmospheric Revitalization System  

NASA Technical Reports Server (NTRS)

The system was studied as a replacement to the present baseline LiOH system for extended duration shuttle missions. The system consists of three subsystems: a solid amine water desorbed regenerable carbon dioxide removal system, a water vapor electrolysis oxygen generating system, and a Sabatier reactor carbon dioxide reduction system. The system is designed for use on a solar powered shuttle vehicle. The majority of the system's power requirements are utilized on the Sun side of each orbit, when solar power is available.

Colling, A. K.; Cushman, R. J.; Hultman, M. M.; Nason, J. R.

1980-01-01

192

Integrated Systems Health Management for Intelligent Systems  

NASA Technical Reports Server (NTRS)

The implementation of an integrated system health management (ISHM) capability is fundamentally linked to the management of data, information, and knowledge (DIaK) with the purposeful objective of determining the health of a system. It is akin to having a team of experts who are all individually and collectively observing and analyzing a complex system, and communicating effectively with each other in order to arrive at an accurate and reliable assessment of its health. In this paper, concepts, procedures, and approaches are presented as a foundation for implementing an intelligent systems ]relevant ISHM capability. The capability stresses integration of DIaK from all elements of a system. Both ground-based (remote) and on-board ISHM capabilities are compared and contrasted. The information presented is the result of many years of research, development, and maturation of technologies, and of prototype implementations in operational systems.

Figueroa, Fernando; Melcher, Kevin

2011-01-01

193

Epilogue: Systems Approaches and Systems Practice  

NASA Astrophysics Data System (ADS)

Each of the five systems approaches discussed in this volume: system dynamics (SD), the viable systems model (VSM), strategic options development and analysis (SODA), soft systems methodology (SSM) and critical systems heuristics (CSH) has a pedigree. Not in the sense of the sometimes absurd spectacle of animals paraded at dog shows. Rather, their pedigree derives from their systems foundations, their capacity to evolve and their flexibility in use. None of the five approaches has developed out of use in restricted and controlled contexts of either low or high levels of complicatedness. Neither has any one of them evolved as a consequence of being applied only to situations with either presumed stakeholder agreement on purpose, or courteous disagreement amongst stakeholders, or stakeholder coercion. The compilation is not a celebration of abstract ‘methodologies', but of theoretically robust approaches that have a genuine pedigree in practice.

Reynolds, Martin; Holwell, Sue

194

Systems engineering for very large systems  

NASA Technical Reports Server (NTRS)

Very large integrated systems have always posed special problems for engineers. Whether they are power generation systems, computer networks or space vehicles, whenever there are multiple interfaces, complex technologies or just demanding customers, the challenges are unique. 'Systems engineering' has evolved as a discipline in order to meet these challenges by providing a structured, top-down design and development methodology for the engineer. This paper attempts to define the general class of problems requiring the complete systems engineering treatment and to show how systems engineering can be utilized to improve customer satisfaction and profit ability. Specifically, this work will focus on a design methodology for the largest of systems, not necessarily in terms of physical size, but in terms of complexity and interconnectivity.

Lewkowicz, Paul E.

1993-01-01

195

Forming different planetary systems  

NASA Astrophysics Data System (ADS)

With the increasing number of detected exoplanet samples, the statistical properties of planetary systems have become much clearer. In this review, we summarize the major statistical results that have been revealed mainly by radial velocity and transiting observations, and try to interpret them within the scope of the classical core-accretion scenario of planet formation, especially in the formation of different orbital architectures for planetary systems around main sequence stars. Based on the different possible formation routes for different planet systems, we tentatively classify them into three major catalogs: hot Jupiter systems, standard systems and distant giant planet systems. The standard system can be further categorized into three sub-types under different circumstances: solar-like systems, hot Super-Earth systems, and subgiant planet systems. We also review the theory of planet detection and formation in binary systems as well as planets in star clusters.

Zhou, Ji-Lin; Xie, Ji-Wei; Liu, Hui-Gen; Zhang, Hui; Sun, Yi-Sui

2012-08-01

196

Recommender System: A Personalized TV Guide System  

Microsoft Academic Search

\\u000a The Electronic Programming Guide helps viewers to navigate between channels, but the measure that new channels are available\\u000a it is inevitable that information overload occurs making systems EPG inadequate. This situation arises the need of personalized\\u000a recommendation systems. In this paper we present a recommendation system compliant with the middleware Ginga. Are presented\\u000a the results obtained with three different mining

Paulo Muniz de Ávila; Sérgio Donizetti Zorzo

197

Novel central nervous system drug delivery systems.  

PubMed

For decades, biomedical and pharmaceutical researchers have worked to devise new and more effective therapeutics to treat diseases affecting the central nervous system. The blood-brain barrier effectively protects the brain, but poses a profound challenge to drug delivery across this barrier. Many traditional drugs cannot cross the blood-brain barrier in appreciable concentrations, with less than 1% of most drugs reaching the central nervous system, leading to a lack of available treatments for many central nervous system diseases, such as stroke, neurodegenerative disorders, and brain tumors. Due to the ineffective nature of most treatments for central nervous system disorders, the development of novel drug delivery systems is an area of great interest and active research. Multiple novel strategies show promise for effective central nervous system drug delivery, giving potential for more effective and safer therapies in the future. This review outlines several novel drug delivery techniques, including intranasal drug delivery, nanoparticles, drug modifications, convection-enhanced infusion, and ultrasound-mediated drug delivery. It also assesses possible clinical applications, limitations, and examples of current clinical and preclinical research for each of these drug delivery approaches. Improved central nervous system drug delivery is extremely important and will allow for improved treatment of central nervous system diseases, causing improved therapies for those who are affected by central nervous system diseases. PMID:24325540

Stockwell, Jocelyn; Abdi, Nabiha; Lu, Xiaofan; Maheshwari, Oshin; Taghibiglou, Changiz

2014-05-01

198

Cogeneration power systems  

NASA Technical Reports Server (NTRS)

Cogeneration is defined as the combination of electrical generation and process heat for more efficient use of fuel. Comparisons of energy utilization in conventional electric power plants and cogeneration electric power plants are presented. Characteristics of various cogeneration systems are also presented. Systems are analyzed for use in utility systems and industrial systems. Economic and cost analysis are reviewed.

Davis, H. S.

1978-01-01

199

The JX Operating System  

Microsoft Academic Search

This paper describes the architecture and performance of the JX operating system. JX is both an operating system completely written in Java and a runtime system for Java applications. Our work demonstrates that it is possible to build a com- plete operating system in Java, achieve a good perfor- mance, and still benefitfrom the modern software-technol- ogy of this object-oriented,

Michael Golm; Meik Felser; Christian Wawersich; Jürgen Kleinöder

2002-01-01

200

Transaction Security System  

Microsoft Academic Search

Components of previous security systems were deslgned Independently from one another and were often dlfficult to integrate. Described is the recently available IBM Transaction Security System. It im iements the Common Cryptograph6 Architecture and offers a comprehensive set of security products that allow users to Implement end-to-end secure systems with IBM components. The system includes a mainframe host-attached

Dennis G. Abraham; George M. Dolan; Glen P. Double; James V. Stevens

1991-01-01

201

Electronic Document Supply Systems.  

ERIC Educational Resources Information Center

Describes electronic document delivery systems used by libraries and document image processing systems used for business purposes. Topics discussed include technical specifications; analogue read-only laser videodiscs; compact discs and CD-ROM; WORM; facsimile; ADONIS (Article Delivery over Network Information System); DOCDEL; and systems at the…

Cawkell, A. E.

1991-01-01

202

The outer solar system  

Microsoft Academic Search

The outer solar system extends beyond a heliocentric distance of 5 AU. It contains the giant planets and their systems (rings and satellites), the Kuiper belt, the comets (except those which approach episodically the inner solar system) and, at its outer edge, the Oort cloud. The outer solar system physically corresponds to the region located outside the « snow line

T. Encrenaz

2009-01-01

203

Authentification for Distributed Systems  

Microsoft Academic Search

A fundamental concern in building a secure distributed system is authentication of local and remote en- tities in the system. We survey authentication issues in distributed system design. Two basic paradigms underlying the design of authentication protocols are presented. We then propose an authentication framework that can be used for designing secure distributed systems, including specific protocols for secure bootstrapping,

Thomas Y. C. Woo; Simon S. Lam

1992-01-01

204

Normative system games  

Microsoft Academic Search

We develop a model of normative systems in which agents are as- sumed to have multiple goals of increasing priority, and investi- gate the computational complexity and game theoretic properties of this model. In the underlying model of normative systems, we use Kripke structures to represent the possible transitions of a multi- agent system. A normative system is then simply

Thomas Ågotnes; Wiebe Van Der Hoek; Michael Wooldridge

2007-01-01

205

Reasoning about naming systems  

Microsoft Academic Search

This paper reasons about naming systems as specialized inference mechanisms, It describes a preference )-zierarch.v that can be used to specify the structure of a naming system's inference mechanism and defines criteria by which different naming systems can be evaluated, For example, the preference hierarchy allows one to compare naming systems based on how dkcrzmznating they are and to identify

Mic Bowman; Saumya K. Debray; Larry L. Peterson

1993-01-01

206

Systems Inquiry in Education  

ERIC Educational Resources Information Center

Four levels of systems inquiry are projected on an abstract-concrete continuum. Most abstract is exposition of general theories of systems, and most concrete is use of specific technical tools. Specific models of systems approaches to instructional development are examined, and a systems-models approach is outlined. (Author)

Banathy, Bela H.; Hayman, John L.

1975-01-01

207

Towards Understanding System Building  

Microsoft Academic Search

Large software systems are composed of complex subsystems which are related to one another as well as underlying platform technologies. These relationships must be captured in a system's build artifacts; they are used by the build process to produce a properly functioning application from the system's source code. These build artifacts evolve along with the system's source code, and understanding

Mina Askari; Rolando Blanco; Alan Grosskurth

208

Medical imaging systems  

DOEpatents

A medical imaging system provides simultaneous rendering of visible light and diagnostic or functional images. The system may be portable, and may include adapters for connecting various light sources and cameras in open surgical environments or laparascopic or endoscopic environments. A user interface provides control over the functionality of the integrated imaging system. In one embodiment, the system provides a tool for surgical pathology.

Frangioni, John V

2013-06-25

209

Broad Bandwidth Telecommunications Systems.  

ERIC Educational Resources Information Center

Broad bandwidth transmission systems have been around for years. They include microwave, assorted cable systems, and recently, satellites. With the exception of some privately owned systems, broadband services have been furnished by the common carriers. Recently, a new element has been added--Cable Antenna Television (CATV) distribution systems.…

Sodolski, John

210

Polymer Electronics Systems - Polytronics  

Microsoft Academic Search

Current trends in the development of electronics systems show that the provision of thin flexible components and semiconductors plays a decisive role in the steadily progressing development of highly integrated systems. A new generation of thin flexible electronic systems arises. At Fraunhofer IZM, inline manufacturing processes for polymer electronic systems are developed on production type equipment. A low-cost process for

KARLHEINZ BOCK

2005-01-01

211

Universal Index System  

NASA Technical Reports Server (NTRS)

The Universal Index System (UIS) is an index management system that uses a uniform interface to solve the heterogeneity problem among database management systems. UIS provides an easy-to-use common interface to access all underlying data, but also allows different underlying database management systems, storage representations, and access methods.

Kelley, Steve; Roussopoulos, Nick; Sellis, Timos; Wallace, Sarah

1993-01-01

212

Digital wireless control system  

Microsoft Academic Search

The Digital Wireless Control System (DWCS) is designed to initiate high explosives safely while using a wireless remote control system. Numerous safety features have been designed into the fire control system to mitigate the hazards associated with remote initiation of high explosives. These safety features range from a telemetry (TM) fire control status system to mechanical timers and keyed power

R. Smith

1993-01-01

213

Noncooperative rendezvous radar system  

NASA Technical Reports Server (NTRS)

A fire control radar system was developed, assembled, and modified. The baseline system and modified angle tracking system are described along with the performance characteristics of the baseline and modified systems. Proposed changes to provide additional techniques for radar evaluation are presented along with flight test data.

1974-01-01

214

Acoustical analysis system  

NASA Technical Reports Server (NTRS)

Integrated system is described which replaces several instruments normally used to analyze acoustical data in failure detection of mechanical or fluid systems. Analysis system extracts and measures repetitive waveforms superimposed on noisy background and compares amplitude with internally stored waveforms. Equipment used in system may be interfaced with general purpose digital computer.

Tatge, R. B.; Scott, P. F.

1972-01-01

215

Photovoltaic systems performance experience  

Microsoft Academic Search

The photovoltaic power systems at Natural Bridges National Monument in southeastern Utah and at radio station WBNO in Bryan, Ohio, provided reliability experience and case histories on failures and repairs of large photovoltaic systems. The PV systems are used for illustration of potential sources of system outages and measures that can be taken to improve the reliability and repair economy

F. J. Solman

1981-01-01

216

Systems for finding people  

Microsoft Academic Search

Finding a previously unknown person with the skills and knowledge to answer a question or perhaps to collaborate with is an effective use of a computer?mediated communication (CMC) system. This article discusses two aspects of systems for finding people, system architectures, and organizational implications.The architectures considered are special interest groups, centralized servers, and decentralized systems. The organizational implications are the

1992-01-01

217

Transients in Power Systems  

Microsoft Academic Search

Power system engineering largely focuses on steady state analysis. The main areas of power system engineering are power flow studies and fault studies - both steady state technologies. But the world is largely transient, and power systems are always subject to time varying and short lived signals. This technical report concerns several important topics in transient analyses of power systems.

M. Belkhayat; J. Edwards; N. Hoonchareon; O. Marte; D. Stenberg; E. Walters

1995-01-01

218

Linear Systems: Using Algebra  

NSDL National Science Digital Library

Students learn to solve a system of linear equations (2 equations with 2 variables) by substitution and elimination methods. They also review the definitions of consistent (independent and dependent) and inconsistent systems, and associate the number of solutions of a system with them. Detailed instructions guide students in using their graphing calculators to solve the systems of equations.

2009-06-14

219

The solar system  

NASA Astrophysics Data System (ADS)

The main concern of this introductory textbook on the solar system is with the present state of knowledge of the solar system. The main features of the solar system are examined, taking into account the semimajor axes of the planets' orbits and the Titius-Bode law, orbits, the center of mass, and axial spins. The earth's interior is considered along with the earth's atmosphere and surface volatiles, Mars, Venus, the acquisition of volatiles by the terrestrial planets, the moon, Mercury, impact cratering of the terrestrial planets, the Jovian system, the Saturnian system, planetary rings, the system of Uranus, the system of Neptune, Pluto, comets, asteroids, meteoroids, and questions regarding the origin and the end of planetary systems. Attention is given to molecular clouds, star formation, cosmogenic theories, the death of stars and of planetary systems, and the possibility of the existence of civilizations on other planetary systems.

Jones, B. W.

220

ENVIRONMENTAL SYSTEMS MANAGEMENT AND SUSTAINABLE SYSTEMS THEORY  

EPA Science Inventory

Environmental Systems Management is the management of environmental problems at the systems level fully accounting for the multi-dimensional nature of the environment. This includes socio-economic dimensions as well as the usual physical and life science aspects. This is importa...

221

Methods and Systems for Operating Oxidizer Systems.  

National Technical Information Service (NTIS)

A method and system for operating a gas turbine engine is provided. The system includes in serial flow arrangement, at least one compressor, a combustor, and at least one turbine. The method includes compressing atmospheric air in the gas turbine engine, ...

R. G. Giffin

2004-01-01

222

Integrated Systems Health Management for Intelligent Systems.  

National Technical Information Service (NTIS)

The implementation of an integrated system health management (ISHM) capability is fundamentally linked to the management of data, information, and knowledge (DIaK) with the purposeful objective of determining the health of a system. It is akin to having a...

F. Figueroa K. Melcher

2010-01-01

223

Using Systems Thinking to Change Systems.  

ERIC Educational Resources Information Center

Systems thinking involves seeing relationships between the parts to the whole within the school improvement effort. After providing the key principles and examples of systems thinking, the article emphasizes the importance of staff development, highlighting experiences at a Wellesley (Massachusetts) middle school and an Alaskan high school. (SM)

Asayesh, Gelareh

1993-01-01

224

Terminal Access System (TAS) System Design Specification.  

National Technical Information Service (NTIS)

The Terminal Access System (TAS) provides a uniform environment for computer naive intelligence analysts as they query data bases distributed on an ARPA-like network. TAS resides on a PDP-11/70 processor and operates under the UNIX Operating System. TAS p...

R. M. Barnhart L. R. Erickson M. E. Soleglad S. L. Westermark

1978-01-01

225

Efficient Evaluation System for Learning Management Systems  

ERIC Educational Resources Information Center

A learning management system (LMS) provides the platform for web-based learning environment by enabling the management, delivery, tracking of learning, testing, communication, registration process and scheduling. There are many LMS systems on the market that can be obtained for free or through payment. It has now become an important task to choose…

Cavus, Nadire

2009-01-01

226

EPICS system: system structure and user interface  

SciTech Connect

This paper present the user's view of and the general organization of the EPICS control system at Fermilab. Various subsystems of the EPICS control system are discussed. These include the user command language, software protection, the device database, remote computer interfaces, and several application utilities. This paper is related to two other papers on EPICS: an overview paper and a detailed implementation paper.

West, R.E.; Bartlett, J.F.; Bobbitt, J.S.; Lahey, T.E.; Kramper, B.J.; MacKinnon, B.A.

1984-02-01

227

Performance, Performance System, and High Performance System  

ERIC Educational Resources Information Center

This article proposes needed transitions in the field of human performance technology. The following three transitions are discussed: transitioning from training to performance, transitioning from performance to performance system, and transitioning from learning organization to high performance system. A proposed framework that comprises…

Jang, Hwan Young

2009-01-01

228

Evolvable synthetic neural system  

NASA Technical Reports Server (NTRS)

An evolvable synthetic neural system includes an evolvable neural interface operably coupled to at least one neural basis function. Each neural basis function includes an evolvable neural interface operably coupled to a heuristic neural system to perform high-level functions and an autonomic neural system to perform low-level functions. In some embodiments, the evolvable synthetic neural system is operably coupled to one or more evolvable synthetic neural systems in a hierarchy.

Curtis, Steven A. (Inventor)

2009-01-01

229

Fluid infusion system  

NASA Technical Reports Server (NTRS)

Performance testing carried out in the development of the prototype zero-g fluid infusion system is described and summarized. Engineering tests were performed in the course of development, both on the original breadboard device and on the prototype system. This testing was aimed at establishing baseline system performance parameters and facilitating improvements. Acceptance testing was then performed on the prototype system to verify functional performance. Acceptance testing included a demonstration of the fluid infusion system on a laboratory animal.

1974-01-01

230

Fundamentals of System Dynamics  

Microsoft Academic Search

\\u000a Unified methods of modeling physical systems are based on the idea that the storage, transmission, and transformation of power\\u000a and energy among system components and between a system and its surroundings are the fundamental processes underlying a system’s\\u000a dynamic behavior. Wellstead [W3] states the idea succinctly:\\u000a \\u000a \\u000a A physical system can be thought of as operating upon a pair of variables

Richard A. Layton

231

Systemic causes of cholestasis.  

PubMed

Systemic causes of cholestasis constitute a diverse group of diseases across organ systems. The pathophysiology of cholestasis in systemic disease can be a consequence of direct involvement of a disease process within the liver or extrahepatic biliary system or secondary to immune-mediated changes in bile flow. Evaluating a patient with cholestasis for a systemic cause requires an understanding of the patient's risk factors, clinical setting (eg, hospitalized or immunosuppressed patient), clinical features, and pattern of laboratory abnormalities. PMID:23540504

Delemos, Andrew S; Friedman, Lawrence S

2013-05-01

232

FNAL system patching design  

SciTech Connect

FNAL has over 5000 PCs running either Linux or Windows software. Protecting these systems efficiently against the latest vulnerabilities that arise has prompted FNAL to take a more central approach to patching systems. Due to different levels of existing support infrastructures, the patching solution for linux systems differs from that of windows systems. In either case, systems are checked for vulnerabilities by Computer Security using the Nessus tool.

Schmidt, Jack; Lilianstrom, Al; Romero, Andy; Dawson, Troy; Sieh, Connie; /Fermilab

2004-01-01

233

Data Acquisition Systems  

NASA Technical Reports Server (NTRS)

Technology developed during a joint research program with Langley and Kinetic Systems Corporation led to Kinetic Systems' production of a high speed Computer Automated Measurement and Control (CAMAC) data acquisition system. The study, which involved the use of CAMAC equipment applied to flight simulation, significantly improved the company's technical capability and produced new applications. With Digital Equipment Corporation, Kinetic Systems is marketing the system to government and private companies for flight simulation, fusion research, turbine testing, steelmaking, etc.

1989-01-01

234

Photovoltaic systems and applications  

SciTech Connect

Abstracts are given of presentations given at a project review meeting held at Albuquerque, NM. The proceedings cover the past accomplishments and current activities of the Photovoltaic Systems Research, Balance-of-System Technology Development and System Application Experiments Projects at Sandia National Laboratories. The status of intermediate system application experiments and residential system analysis is emphasized. Some discussion of the future of the Photovoltaic Program in general, and the Sandia projects in particular is also presented.

Not Available

1982-01-01

235

Photovoltaic systems performance experience  

SciTech Connect

The photovoltaic power systems at Natural Bridges National Monument in southeastern Utah and at radio station WBNO in Bryan, Ohio, provide some early reliability experience and case histories on failures and repairs of large photovoltaic systems. They are used here to illustrate potential sources of system outages and measures that can be taken to improve the reliability and repair economy of present and future PV systems. Both systems have experienced lighting strikes and the results are reported.

Solman, F.J.

1981-01-01

236

Automated Pilot Advisory System  

NASA Technical Reports Server (NTRS)

An Automated Pilot Advisory System (APAS) was developed and operationally tested to demonstrate the concept that low cost automated systems can provide air traffic and aviation weather advisory information at high density uncontrolled airports. The system was designed to enhance the see and be seen rule of flight, and pilots who used the system preferred it over the self announcement system presently used at uncontrolled airports.

Parks, J. L., Jr.; Haidt, J. G.

1981-01-01

237

NASA Systems Engineering Handbook  

NASA Technical Reports Server (NTRS)

This handbook brings the fundamental concepts and techniques of systems engineering to NASA personnel in a way that recognizes the nature of NASA systems and environment. It is intended to accompany formal NASA training courses on systems engineering and project management when appropriate, and is designed to be a top-level overview. The concepts were drawn from NASA field center handbooks, NMI's/NHB's, the work of the NASA-wide Systems Engineering Working Group and the Systems Engineering Process Improvement Task team, several non-NASA textbooks and guides, and material from independent systems engineering courses taught to NASA personnel. Five core chapters cover systems engineering fundamentals, the NASA Project Cycle, management issues in systems engineering, systems analysis and modeling, and specialty engineering integration. It is not intended as a directive. Superseded by: NASA/SP-2007-6105 Rev 1 (20080008301).

Shishko, Robert; Aster, Robert; Chamberlain, Robert G.; Mcduffee, Patrick; Pieniazek, Les; Rowell, Tom; Bain, Beth; Cox, Renee I.; Mooz, Harold; Polaski, Lou

1995-01-01

238

Modeling Power Systems as Complex Adaptive Systems  

SciTech Connect

Physical analogs have shown considerable promise for understanding the behavior of complex adaptive systems, including macroeconomics, biological systems, social networks, and electric power markets. Many of today's most challenging technical and policy questions can be reduced to a distributed economic control problem. Indeed, economically based control of large-scale systems is founded on the conjecture that the price-based regulation (e.g., auctions, markets) results in an optimal allocation of resources and emergent optimal system control. This report explores the state-of-the-art physical analogs for understanding the behavior of some econophysical systems and deriving stable and robust control strategies for using them. We review and discuss applications of some analytic methods based on a thermodynamic metaphor, according to which the interplay between system entropy and conservation laws gives rise to intuitive and governing global properties of complex systems that cannot be otherwise understood. We apply these methods to the question of how power markets can be expected to behave under a variety of conditions.

Chassin, David P.; Malard, Joel M.; Posse, Christian; Gangopadhyaya, Asim; Lu, Ning; Katipamula, Srinivas; Mallow, J V.

2004-12-30

239

Intelligent systems technology infrastructure for integrated systems  

NASA Technical Reports Server (NTRS)

A system infrastructure must be properly designed and integrated from the conceptual development phase to accommodate evolutionary intelligent technologies. Several technology development activities were identified that may have application to rendezvous and capture systems. Optical correlators in conjunction with fuzzy logic control might be used for the identification, tracking, and capture of either cooperative or non-cooperative targets without the intensive computational requirements associated with vision processing. A hybrid digital/analog system was developed and tested with a robotic arm. An aircraft refueling application demonstration is planned within two years. Initially this demonstration will be ground based with a follow-on air based demonstration. System dependability measurement and modeling techniques are being developed for fault management applications. This involves usage of incremental solution/evaluation techniques and modularized systems to facilitate reuse and to take advantage of natural partitions in system models. Though not yet commercially available and currently subject to accuracy limitations, technology is being developed to perform optical matrix operations to enhance computational speed. Optical terrain recognition using camera image sequencing processed with optical correlators is being developed to determine position and velocity in support of lander guidance. The system is planned for testing in conjunction with Dryden Flight Research Facility. Advanced architecture technology is defining open architecture design constraints, test bed concepts (processors, multiple hardware/software and multi-dimensional user support, knowledge/tool sharing infrastructure), and software engineering interface issues.

Lum, Henry

1991-01-01

240

Education Systemic Change Tools  

NSDL National Science Digital Library

The National School Boards Association provides this website as a guide to systemic change for those in the field of education. This site is broken up into three sections that explain what systemic change is, outline the process for systemic change, offer advice for difficulties along the way, and list resources for implementing systemic change in any educational organization âÂÂfrom the classroom to the federal level," including the section "Leading Systemic Change" for those who would like to take charge and put systemic change in their own hands.

2008-07-29

241

Inertial navigation systems analysis.  

NASA Technical Reports Server (NTRS)

This volume offers the avionic systems engineer a fundamental exposition of the mechanization and error analysis of inertial navigation systems. While the material is applicable to spacecraft and undersea navigation, emphasis is placed upon terrestrial applications on or slightly above the earth's surface. As a result, practical considerations are geared toward those aircraft navigation systems of particular current interest. Extensive use is made of perturbation techniques to develop linearized system equations, whose solutions closely approximate those obtained by nonlinear differential equations. A unified error analysis technique is developed that is applicable to virtually all system configurations. The technique provides a greatly simplified method for comparing the performance of competing system configurations.

Britting, K. R.

1971-01-01

242

Flash evaporator systems test  

NASA Technical Reports Server (NTRS)

A flash evaporator heat rejection system representative of that proposed for the space shuttle orbiter underwent extensive system testing at the NASA Johnson Space Center (JSC) to determine its operational suitability and to establish system performance/operational characteristics for use in the shuttle system. During the tests the evaporator system demonstrated its suitability to meet the shuttle requirements by: (1) efficient operation with 90 to 95% water evaporation efficiency, (2) control of outlet temperature to 40 + or - 2 F for partial heat load operation, (3) stability of control system for rapid changes in Freon inlet temperature, and (4) repeated dormant-to-active device operation without any startup procedures.

Dietz, J. B.

1976-01-01

243

Data Acquisition Systems  

NASA Technical Reports Server (NTRS)

In the mid-1980s, Kinetic Systems and Langley Research Center determined that high speed CAMAC (Computer Automated Measurement and Control) data acquisition systems could significantly improve Langley's ARTS (Advanced Real Time Simulation) system. The ARTS system supports flight simulation R&D, and the CAMAC equipment allowed 32 high performance simulators to be controlled by centrally located host computers. This technology broadened Kinetic Systems' capabilities and led to several commercial applications. One of them is General Atomics' fusion research program. Kinetic Systems equipment allows tokamak data to be acquired four to 15 times more rapidly. Ford Motor company uses the same technology to control and monitor transmission testing facilities.

1994-01-01

244

MLS: Airplane system modeling  

NASA Technical Reports Server (NTRS)

Analysis, modeling, and simulations were conducted as part of a multiyear investigation of the more important airplane-system-related items of the microwave landing system (MLS). Particular emphasis was placed upon the airplane RF system, including the antenna radiation distribution, the cabling options from the antenna to the receiver, and the overall impact of the airborne system gains and losses upon the direct-path signal structure. In addition, effort was expended toward determining the impact of the MLS upon the airplane flight management system and developing the initial stages of a fast-time MLS automatic control system simulation model. Results ot these studies are presented.

Thompson, A. D.; Stapleton, B. P.; Walen, D. B.; Rieder, P. F.; Moss, D. G.

1981-01-01

245

RHIC magnet electrical system  

NASA Astrophysics Data System (ADS)

The RHIC magnet electrical system consists primarily of the power converters that are used to energize the superconducting magnets in the collider ring, the power distribution system (both room temperature and superconducting) to deliver that power from the converters to the magnets, a detection system to monitor for quenches in the magnets and superconducting cables, and a protection system to remove power from the superconductors if a quench is detected. This system also has major interfaces with the Control System for commands, status monitoring, current setting and analog monitoring of the power supplies, and with Conventional Facilities for power distribution of the mains at and below the 480VAC level.

Bruno, D.; Eng, W.; Feng, P. K.; Ganetis, G.; Lambiase, R. F.; Louie, W.

2003-03-01

246

Verification of Adaptive Systems  

SciTech Connect

Adaptive systems are critical for future space and other unmanned and intelligent systems. Verification of these systems is also critical for their use in systems with potential harm to human life or with large financial investments. Due to their nondeterministic nature and extremely large state space, current methods for verification of software systems are not adequate to provide a high level of assurance for them. The combination of stabilization science, high performance computing simulations, compositional verification and traditional verification techniques, plus operational monitors, provides a complete approach to verification and deployment of adaptive systems that has not been used before. This paper gives an overview of this approach.

Pullum, Laura L [ORNL; Cui, Xiaohui [New York Institute of Technology (NYIT); Vassev, Emil [Lero – The Irish Software Engineering Research Centre; Hinchey, Mike [Lero – The Irish Software Engineering Research Centre; Rouff, Christopher [Lockheed Martin Corporation; Buskens, Richard [Lockheed Martin Corporation

2012-01-01

247

Cooperating systems: Layered MAS  

NASA Technical Reports Server (NTRS)

Distributed intelligent systems can be distinguished by the models that they use. The model developed focuses on layered multiagent system conceived of as a bureaucracy in which a distributed data base serves as a central means of communication. The various generic bureaus of such a system is described and a basic vocabulary for such systems is presented. In presenting the bureaus and vocabularies, special attention is given to the sorts of reasonings that are appropriate. A bureaucratic model has a hierarchy of master system and work group that organizes E agents and B agents. The master system provides the administrative services and support facilities for the work groups.

Rochowiak, Daniel

1990-01-01

248

T-systems and Y-systems in integrable systems  

NASA Astrophysics Data System (ADS)

T- and Y-systems are ubiquitous structures in classical and quantum integrable systems. They are difference equations having a variety of aspects related to commuting transfer matrices in solvable lattice models, q-characters of Kirillov-Reshetikhin modules of quantum affine algebras, cluster algebras with coefficients, periodicity conjectures of Zamolodchikov and others, dilogarithm identities in conformal field theory, difference analog of L-operators in KP hierarchy, Stokes phenomena in 1D Schrödinger problem, AdS/CFT correspondence, Toda field equations on discrete spacetime, Laplace sequence in discrete geometry, Fermionic character formulas and combinatorial completeness of Bethe ansatz, Q-system and ideal gas with exclusion statistics, analytic and thermodynamic Bethe ansätze, quantum transfer matrix method and so forth. This review is a collection of short reviews on these topics which can be read more or less independently. This work is dedicated to the memory of professor Morikazu Toda.

Kuniba, Atsuo; Nakanishi, Tomoki; Suzuki, Junji

2011-03-01

249

SUBSURFACE EMPLACEMENT TRANSPORTATION SYSTEM  

SciTech Connect

The objective of this analysis is to identify issues and criteria that apply to the design of the Subsurface Emplacement Transportation System (SET). The SET consists of the track used by the waste package handling equipment, the conductors and related equipment used to supply electrical power to that equipment, and the instrumentation and controls used to monitor and operate those track and power supply systems. Major considerations of this analysis include: (1) Operational life of the SET; (2) Geometric constraints on the track layout; (3) Operating loads on the track; (4) Environmentally induced loads on the track; (5) Power supply (electrification) requirements; and (6) Instrumentation and control requirements. This analysis will provide the basis for development of the system description document (SDD) for the SET. This analysis also defines the interfaces that need to be considered in the design of the SET. These interfaces include, but are not limited to, the following: (1) Waste handling building; (2) Monitored Geologic Repository (MGR) surface site layout; (3) Waste Emplacement System (WES); (4) Waste Retrieval System (WRS); (5) Ground Control System (GCS); (6) Ex-Container System (XCS); (7) Subsurface Electrical Distribution System (SED); (8) MGR Operations Monitoring and Control System (OMC); (9) Subsurface Facility System (SFS); (10) Subsurface Fire Protection System (SFR); (11) Performance Confirmation Emplacement Drift Monitoring System (PCM); and (12) Backfill Emplacement System (BES).

T. Wilson; R. Novotny

1999-11-22

250

Observability of complex systems  

PubMed Central

A quantitative description of a complex system is inherently limited by our ability to estimate the system’s internal state from experimentally accessible outputs. Although the simultaneous measurement of all internal variables, like all metabolite concentrations in a cell, offers a complete description of a system’s state, in practice experimental access is limited to only a subset of variables, or sensors. A system is called observable if we can reconstruct the system’s complete internal state from its outputs. Here, we adopt a graphical approach derived from the dynamical laws that govern a system to determine the sensors that are necessary to reconstruct the full internal state of a complex system. We apply this approach to biochemical reaction systems, finding that the identified sensors are not only necessary but also sufficient for observability. The developed approach can also identify the optimal sensors for target or partial observability, helping us reconstruct selected state variables from appropriately chosen outputs, a prerequisite for optimal biomarker design. Given the fundamental role observability plays in complex systems, these results offer avenues to systematically explore the dynamics of a wide range of natural, technological and socioeconomic systems.

Liu, Yang-Yu; Slotine, Jean-Jacques; Barabasi, Albert-Laszlo

2013-01-01

251

Control Systems Design for Uncertain Dynamical Systems.  

National Technical Information Service (NTIS)

The use of approximate plant models for computer-aided controller design for multivariable systems with uncertain or unknown dynamic model is considered. The techniques incorporate observed differences in plant/model time-response characteristics into the...

D. H. Owens A. Chotai

1982-01-01

252

Business System Planning Project System Requirements Specification  

SciTech Connect

The purpose of the Business Systems Planning Project System Requirements Specification (SRS) is to provide the outline and contents of the requirements for the CH2M HILL Hanford Group, Inc. (CHG) integrated business and technical information systems. The SRS will translate proposed objectives into the statement of the functions that are to be performed and data and information flows that they require. The requirements gathering methodology will use (1) facilitated group requirement sessions; (2) individual interviews; (3) surveys; and (4) document reviews. The requirements will be verified and validated through coordination of the technical requirement team and CHG Managers. The SRS document used the content and format specified in Lockheed Martin Services, Inc. Organization Standard Software Practices in conjunction with the Institute of Electrical and Electronics Engineers Standard 8340-1984 for Systems Requirements Documents.

NELSON, R.E.

2000-09-08

253

Logistic Management Information System - Lmi System Implementation.  

National Technical Information Service (NTIS)

A summary statement of the major actions required to implement the system is provided in AD-679 049. The present paper discusses these major action requirements, and provides a detailed listing of the subordinate elements of each.

1968-01-01

254

From Static Distributed Systems to Dynamic Systems  

Microsoft Academic Search

Abstract A noteworthy advance in distributed computing,is due to the recent development,of peer-to-peer systems. These sys- tems are essentially dynamic,in the sense that no process can get a global knowledge,on the system structure. They mainly allow processes to look up for data that can be dy- namically added\\/suppressed in a permanently,evolving set of nodes. Although protocols have been developed for

Achour Mostéfaoui; Michel Raynal; Corentin Travers; Stacy Patterson; Divyakant Agrawal; Amr El Abbadi

2005-01-01

255

Integrated Systems Health Management for Intelligent Systems  

NASA Technical Reports Server (NTRS)

The implementation of an integrated system health management (ISHM) capability is fundamentally linked to the management of data, information, and knowledge (DIaK) with the purposeful objective of determining the health of a system. Management implies storage, distribution, sharing, maintenance, processing, reasoning, and presentation. ISHM is akin to having a team of experts who are all individually and collectively observing and analyzing a complex system, and communicating effectively with each other in order to arrive at an accurate and reliable assessment of its health. In this chapter, concepts, procedures, and approaches are presented as a foundation for implementing an ISHM capability relevant to intelligent systems. The capability stresses integration of DIaK from all elements of a system, emphasizing an advance toward an on-board, autonomous capability. Both ground-based and on-board ISHM capabilities are addressed. The information presented is the result of many years of research, development, and maturation of technologies, and of prototype implementations in operational systems.

Figueroa, Fernando; Melcher, Kevin

2011-01-01

256

System and method for creating expert systems  

NASA Technical Reports Server (NTRS)

A system and method provides for the creation of a highly graphical expert system without the need for programming in code. An expert system is created by initially building a data interface, defining appropriate Mission, User-Defined, Inferred, and externally-generated GenSAA (EGG) data variables whose data values will be updated and input into the expert system. Next, rules of the expert system are created by building appropriate conditions of the rules which must be satisfied and then by building appropriate actions of rules which are to be executed upon corresponding conditions being satisfied. Finally, an appropriate user interface is built which can be highly graphical in nature and which can include appropriate message display and/or modification of display characteristics of a graphical display object, to visually alert a user of the expert system of varying data values, upon conditions of a created rule being satisfied. The data interface building, rule building, and user interface building are done in an efficient manner and can be created without the need for programming in code.

Hughes, Peter M. (Inventor); Luczak, Edward C. (Inventor)

1998-01-01

257

Developing Expert Systems.  

National Technical Information Service (NTIS)

The document provides a set of general guidelines for the development and distribution of highway related expert systems. This expands the guidelines provided in Chapter X, Expert Systems, of the ADP Management Manual. Included is information on developin...

D. Barnett, C. Jackson, J. A. Wentworth

1988-01-01

258

Redundant system reliability analysis  

NASA Technical Reports Server (NTRS)

Computer Aided Redundant System Reliability Analysis (CARSARA) program facilitates reliability assessment of fault-tolerance reconfigurable systems. CARSRA accounts for influences from transient faults and is used to model wide range of redundancy management strategies.

Masreliez, C. J.

1979-01-01

259

Optical components and systems  

SciTech Connect

This book contains papers under the following section headings: Optical technology in the Netherlands; Design and analysis of optical systems; System design examples; Fabrication and testing tendencies; and Optical components and materials.

Masson, A.

1987-01-01

260

Hellfire System Model Validation.  

National Technical Information Service (NTIS)

The hybrid simulation facilities, system modeling, and validation process for a U.S. Army missile development program are discussed. Two fundamental problems in missile system design and development require an accurate, valid, proven computer simulation; ...

R. V. Hupp

1988-01-01

261

Implantable Insulin Delivery System.  

National Technical Information Service (NTIS)

An insulin delivery system suitable for experimental implants and external use has been developed to study glucose control for diabetics. The programmable system developed at Sandia National Laboratories, in conjunction with the University of New Mexico S...

J. T. Love J. I. Gaona

1981-01-01

262

JT-60 Control System  

SciTech Connect

The present status of the JT-60U control system is reported including its original design concept, the progress of the system, and various modifications since the JT-60 upgrade. This control system has features of a functionally distributed and hierarchical structure, using CAMAC interfaces initially, which have been replaced by versatile module Europe (VME)-bus interfaces, and a protective interlock system composed of both software and hard-wired interlock logics. Plant monitoring and control are performed by efficient data communication through CAMAC highways and Ethernet with TCP/IP protocols. Sequential control of plasma discharges is executed by a combination of a remodeled VME-bus system and a timing system. A real-time plasma control system and a human interface system have been continuously modified corresponding to the progress of JT-60U experiments.

Yonekawa, I.; Kawamata, Y.; Totsuka, T.; Akasaka, H.; Sueoka, M.; Kurihara, K.; Kimura, T. [Japan Atomic Energy Research Institute (Japan)

2002-09-15

263

Acquisitions and Cataloguing Systems.  

National Technical Information Service (NTIS)

Automated systems for acquisitions and catalogue production for the Wessex Medical Library are outlined in this interim report, with some account of why particular decisions were made. Section A describes the acquisitions system and Section B describes th...

R. G. Woods

1971-01-01

264

Digital Systems Design Language.  

National Technical Information Service (NTIS)

Digital Systems Design Language (DDL) is implemented on the SEL-32 Computer Systems. The detaileds of the language, the translator, and the simulator, and the smulator programs are given. Several example descriptions and a tutorial on hardware description...

S. G. Shiva

1979-01-01

265

Paravirtualization for HPC Systems.  

National Technical Information Service (NTIS)

Virtualization has become increasingly popular for enabling full system isolation, load balancing, and hardware multiplexing. This wide-spread use is the result of novel techniques such as paravirtualization that make virtualization systems practical and ...

B. Gorda C. Krintz L. Youseff R. Wolski

2006-01-01

266

Automated Patent Reporting System.  

National Technical Information Service (NTIS)

The report represents complete documentation of the Automated Patent Reporting System (APRS) currently in operation at the Transportation Systems Center. The APRS was developed to satisfy TSC and DOT patent reporting needs. It has been designed to operate...

H. E. Farmer C. J. Caso

1971-01-01

267

Inertial Navigational Systems.  

National Technical Information Service (NTIS)

A semi-technical discussion is given of operating conditions, interaction of separate units and causes of errors of inertial guidance and navigational systems. Considerable attention is given to analysis of the operation of inertial systems under conditio...

V. S. Frolov

1964-01-01

268

Cardiac conduction system  

MedlinePLUS Videos and Cool Tools

... the ventricles to contract. This signal creates an electrical current that can be seen on a graph called an Electrocardiogram (EKG or ECG). Doctors use an EKG to monitor the cardiac conduction system’s electrical activity in the heart.

269

Systemic Amyloidosis Complicating Dermatoses.  

National Technical Information Service (NTIS)

Certain dermatoses may be complicated by systemic amyloidosis. The underlying disorders in eight of 100 patients with secondary systemic amyloidosis studied at autopsy were: hidradenitis suppurativa, stasis ulcers, psoriatic arthritis, basal cell carcinom...

M. H. Brownstein E. B. Helwig

1970-01-01

270

Silver recovery system data  

SciTech Connect

In August of 1990 the Savannah River Site Photography Group began testing on a different type of silver recovery system. This paper describes the baseline study and the different phases of installation and testing of the system.

Boulineau, B.

1991-08-26

271

Modular optical detector system  

DOEpatents

A modular optical detector system. The detector system is designed to detect the presence of molecules or molecular species by inducing fluorescence with exciting radiation and detecting the emitted fluorescence. Because the system is capable of accurately detecting and measuring picomolar concentrations it is ideally suited for use with microchemical analysis systems generally and capillary chromatographic systems in particular. By employing a modular design, the detector system provides both the ability to replace various elements of the detector system without requiring extensive realignment or recalibration of the components as well as minimal user interaction with the system. In addition, the modular concept provides for the use and addition of a wide variety of components, including optical elements (lenses and filters), light sources, and detection means, to fit particular needs.

Horn, Brent A. (Livermore, CA); Renzi, Ronald F. (Tracy, CA)

2006-02-14

272

Desiccant Systems Save Money.  

National Technical Information Service (NTIS)

Desiccant systems can save the Navy money through lower utility bills. Traditional vapor compression air conditioning systems are required to remove both sensible heat and latent heat (humidity) by cooling the outside air below the dewpoint in order to co...

P. Kister

1996-01-01

273

Computer Systems Research  

NSF Publications Database

... in automobiles and appliances to worldwide grids of advanced processors, storage, graphics devices ... high-end computing systems, including grids; local-area networks of enterprise systems; clusters of ...

274

Computer Systems Research (CSR)  

NSF Publications Database

... in automobiles and appliances to worldwide grids of advanced processors, storage, graphics devices ... high-end computing systems, including grids; local-area networks of enterprise systems; clusters of ...

275

Intensive care alarm system  

NASA Technical Reports Server (NTRS)

Inductive loop has been added to commercially available call system fitted with earphone receiver. System transmits high frequency signals to nurse's receiver to announce patient's need for help without disturbing others.

Christensen, J. L.; Herbert, A. L.

1973-01-01

276

Diversity of Planetary Systems.  

National Technical Information Service (NTIS)

Models of planet formation and of the orbital stability of planetary systems are described and used to discuss possible characteristics of undiscovered planetary systems. Modern theories of star and planet formation, which are based upon observations of t...

J. J. Lissauer

1997-01-01

277

Plasma Motor Generator System.  

National Technical Information Service (NTIS)

The significant potential advantages of a plasma motor generator system over conventional systems for the generation of electrical power and propulsion for spacecraft in low Earth orbits warrants its further investigation. The two main components of such ...

G. E. Hite

1987-01-01

278

Digital Communication System.  

National Technical Information Service (NTIS)

A closed-loop, digital data communication system utilizing an optimum number of interconnecting wires is described. The system has particular application in a space vehicle where it may be desired to communicate voice or other transducer-derived informati...

L. G. Monford

1972-01-01

279

Human Resources Information System.  

National Technical Information Service (NTIS)

The information reported represents the preliminary design for a personnel information system for the state of Illinois, an automated management information system, designed to examine past and current demographic data on employees in state government. Th...

1973-01-01

280

Atmospheric Detritiation System Performance.  

National Technical Information Service (NTIS)

An investigation of the performance of atmospheric detritiation systems and of possible ways for improving their performance was undertaken. Small-scale experiments demonstrated that system performance is strongly dependent on catalyst bed temperature. Th...

G. R. Longhurst R. A. Jalbert R. L. Rossmassler

1988-01-01

281

Standardized Modular Antenna System.  

National Technical Information Service (NTIS)

For use in a submarine, an easily reconfigurable mast antenna system disposed within an RF transparent radome is disclosed where modularly, interchangeably designed antenna of the system are detachably attached to each other via an electronic interface co...

D. J. Saleem

1997-01-01

282

Central Nervous System Vasculitis  

MedlinePLUS

... dose steroids such as prednisone, in combination with cyclophosphamide (a medication that decreases the immune system’s response ... if that does not effectively treat the disease, cyclophosphamide is added. Treatment must be continued for a ...

283

All Systems Are Go  

NSDL National Science Digital Library

Test your knowledge of the digestive, respiratory, and other human body systems in this interactive game from Kinetic City. Race the clock to put Arnold's organs back into his body one system at a time.

Foundation, Wgbh E.

2007-08-09

284

Composability for Secure Systems.  

National Technical Information Service (NTIS)

This document is the final technical report for the Composability for Secure Systems (CSS) program whose objective was to develop and demonstrate a composable methodology for building highly-assured, fault tolerant distributed systems and networks, and to...

D. Olawsky C. Payne T. Fine T. Sundquist D. Apostal

2001-01-01

285

UNIFORM DATA SYSTEM (UDS)  

EPA Science Inventory

This data collection system collects uniformly-defined information for the major BPHC grant programs. The system yields consistent information on patient characteristics and clinical conditions. The UDS provides data on services, site locations, delivery methods, staffing, client...

286

Gradiometric inertial navigation system.  

NASA Astrophysics Data System (ADS)

Equations are obtained which describe conditions for the perfect operation of a gradiometric inertial navigation system. The information structure of the gradiometric measurements is identified. Versions of the algorithmic and instrumental implementations of the system are proposed.

Korotaev, Iu. A.

1989-01-01

287

Fluids Systems Course  

NSDL National Science Digital Library

This pdf contains a syllabus for a course on fluids systems as part of the Aerospace Technology Program. Topics include fluid power standards, hydraulic power, pneumatic power, hypergolic and cryogenic flight systems, and hypergolic loading.

2011-08-01

288

Ocean Systems. Program Summary.  

National Technical Information Service (NTIS)

This program summary describes each of the DOE's Ocean Systems Program projects funded during FY 1978 (October 1, 1977 through September 30, 1978) and reflects their status as of September 30, 1978. The Ocean Systems Program includes ocean thermal energy ...

1979-01-01

289

Platform Loading System.  

National Technical Information Service (NTIS)

A platform loading system has an elevator platform mounted loader unit and a magazine mounted loader unit in each magazine served by the loader system. Each loader unit consists of one cargo tray and its associated tray transfer machinery.

G. J. Laskowski R. J. Schrick

1976-01-01

290

AC Servo System.  

National Technical Information Service (NTIS)

Mitsubishi Electric has developed an AC servo system for numerical control and mechatronic applications aimed at maintenance-free operation and high reliability. This system includes a three-phase synchronous motor with a permanent-magnet rotor. Starting ...

H. Sugimoto H. Matsumoto T. Takeshita

1983-01-01

291

An AC Initiation System.  

National Technical Information Service (NTIS)

The patent application relates to initiation systems, and more particularly to an ac initiation system using three ac transmission signals interlocked for safety by frequency, phase and power discrimination. (Author)

M. T. Winton

1978-01-01

292

Electrical System Compliance Guideline.  

National Technical Information Service (NTIS)

Electrical systems for many types of boats are complex. The regulations have selected critical areas pertaining to electrical systems from the standpoint of safety and stipulate requirements to assure good practice in these areas. Some requirements may be...

1978-01-01

293

Organic Based Imaging Systems.  

National Technical Information Service (NTIS)

The paper reviews progress in organic based imaging systems, particularly those systems based on cholesteric liquid crystals, nematic liquid crystals, photopolymerization, and photochromic materials. An introductory discussion is given on liquid crystals....

J. D. Margerum

1971-01-01

294

Automated Intelligibility Measurement System.  

National Technical Information Service (NTIS)

The report discusses the design, development, and test of a microprocessor based system for measuring the intelligibility of speech processed through a communications channel. The major components of the intelligibility measurement system include an audio...

T. Lerner

1980-01-01

295

RM Design Expert System.  

National Technical Information Service (NTIS)

This effort investigated and developed a proof-of-concept software system that combines reliability, testability, and maintainability analysis capabilities into a single tool. The system recommends tests and testpoints based on potential faults (associate...

A. M. Kitchen J. Steelhammer D. Doskocil E. Freeman G. Elias

1994-01-01

296

Burst synchronization detection system  

NASA Technical Reports Server (NTRS)

System uses digital logic and a voltage-controlled oscillator to obtain appropriate horizontal and vertical sync signals from the sync bursts contained in the original transmitted signal. It is useful in systems that exhibit considerable single amplitude fluctuation.

Lipoma, P. C.; Seay, B. P., Jr.

1970-01-01

297

Automatic Shoran Bombing System.  

National Technical Information Service (NTIS)

The automatic bombing or navigation system is controlled by a digital computer which is programmed before takeoff and during flights receives other information. The system increases the number of aircraft serviced by a single group of beacons.

D. W. Burbeck E. E. Bolles W. E. Frady W. L. Exner J. D. Hogan

1964-01-01

298

Highly Autonomous Systems Workshop  

NASA Technical Reports Server (NTRS)

It is our aim by launching a series of workshops on the topic of highly autonomous systems to reach out to the larger community interested in technology development for remotely deployed systems, particularly those for exploration.

Doyle, R.; Rasmussen, R.; Man, G.; Patel, K.

1998-01-01

299

Validation of multiprocessor systems  

NASA Technical Reports Server (NTRS)

Experiments that can be used to validate fault free performance of multiprocessor systems in aerospace systems integrating flight controls and avionics are discussed. Engineering prototypes for two fault tolerant multiprocessors are tested.

Siewiorek, D. P.; Segall, Z.; Kong, T.

1982-01-01

300

Photovoltaic Systems Performance Experience.  

National Technical Information Service (NTIS)

The photovoltaic power systems at Natural Bridges National Monument in southeastern Utah and at radio station WBNO in Bryan, Ohio, provide some early reliability experience and case histories on failures and repairs of large photovoltaic systems. They are...

F. J. Solman

1981-01-01

301

Gaseous Illuminant Pyrotechnic Systems.  

National Technical Information Service (NTIS)

Candlepower efficiencies obtainable with conventional pyrotechnic systems such as magnesium-sodium nitrate have essentially reached a maximum. Thus an intensive study was initiated to determine if gaseous systems could develop luminous efficiencies exceed...

A. D. Kirshenbaum F. R. Taylor

1969-01-01

302

Course Evaluation System.  

National Technical Information Service (NTIS)

In the face of increasing pressures on the training system to increase its efficiency and effectiveness, the improvement of Navy classroom training is an important issue. This report describes the Course Evaluation System (CES) which is a prescriptive met...

J. Ellis F. Knirk B. Taylor B. McDonald

1987-01-01

303

Dynamic Positioning Systems Photogrammetric.  

National Technical Information Service (NTIS)

Many electronic dynamic positioning systems that use a variety of technologies, such as laser ranging, UHF signal ranging and satellite ranging, are currently available. With the advances in technology, these systems are undoubtedly becoming more and more...

A. Niles

1991-01-01

304

Omega system performance assessment  

NASA Astrophysics Data System (ADS)

A measure of system performance, termed the system availability index, is introduced as: (1) an indicator of operational performance; (2) a probability of system access and utility to the system subscriber; and (3) a means of comparing system options. Theoretical development of the index is given in terms of a system availability model which is based on receiver/station reliability, signal coverage, and user geographic priorities. Sample calculations of the index are presented to illustrate comparison of system options, e.g., the effect of a station off-air. Techniques are presented to compute a station power level assignment and station off-air maintenance schedule. Comparison of signals from the VLF communications stations and the Omega system in terms of signal coverage, receiver utilization, and government policy is also given.

Morris, Peter B.

1989-03-01

305

Paradigms for Abstracting Systems.  

ERIC Educational Resources Information Center

Discussion of abstracting systems focuses on the paradigm concept and identifies and explains four paradigms: communicational, or information theory; physical, including information retrieval; cognitive, including information processing and artificial intelligence; and systemic, including quality management. Emphasizes multidimensionality and…

Pinto, Maria; Galvez, Carmen

1999-01-01

306

Computer system administrator  

NSDL National Science Digital Library

Teachers can direct students to this material to help them investigate a career as a computer systems analyst, particularly as a computer systems administrator. Having students review this page can be an excellent precursor to a job-shadowing activity.

Project, Iowa P.

2002-01-01

307

General Education Management System  

ERIC Educational Resources Information Center

Discusses an open-ended, generalized programing system which eliminates the duplication of effort and materials in data collection, storage, and reporting that is common in most piecemeal-evolved current management systems. (DE)

Tonks, Jesse W.

1970-01-01

308

Honeycomb Reconfigurable Manufacturing System.  

National Technical Information Service (NTIS)

A honeycomb multi-stage manufacturing system and associated methods. The system includes a plurality of hexagonal cells defining a honeycomb structure, at least first and second continuous assembly lines defined along selected cell sides for assembling fi...

Y. Koren

2005-01-01

309

Systems in Science  

NSDL National Science Digital Library

Undergraduate elementary education majors participate in an interdisciplinary course focused on modeling scientific systems. Students' applications of three artificial intelligence concepts used in modeling scientific systems were investigated before and

Karr, Charles L.; Smith, Coralee; Sunal, Cynthia S.; Sunal, Dennis W.

2003-03-01

310

Double Degenerate Binary Systems  

SciTech Connect

In this study, angular momentum loss via gravitational radiation in double degenerate binary (DDB)systems (NS + NS, NS + WD, WD + WD, and AM CVn) is studied. Energy loss by gravitational waves has been estimated for each type of systems.

Yakut, K. [University of Ege, Department of Astronomy and Space Sciences, 35100-Izmir (Turkey)

2011-09-21

311

Automatic Jamming System.  

National Technical Information Service (NTIS)

The system seeks out the frequency of the signal which is to be jammed, and transmits a jamming signal at that frequency. This system has an additional feature which is termed 'listening through.' The ' listening through' components interrupt the jamming ...

P. C. Goldmark

1964-01-01

312

Military Satellite Communications Systems.  

National Technical Information Service (NTIS)

MILSATCOM systems consist of three primary segments: earth terminal (airborne, ground, sea) segment, sp segment, and control segment. MILSATCOM systems are vital to Department of Defense as they satisfy certain essential communications connectivity needs ...

1992-01-01

313

System status display evaluation  

NASA Technical Reports Server (NTRS)

The System Status Display is an electronic display system which provides the crew with an enhanced capability for monitoring and managing the aircraft systems. A flight simulation in a fixed base cockpit simulator was used to evaluate alternative design concepts for this display system. The alternative concepts included pictorial versus alphanumeric text formats, multifunction versus dedicated controls, and integration of the procedures with the system status information versus paper checklists. Twelve pilots manually flew approach patterns with the different concepts. System malfunctions occurred which required the pilots to respond to the alert by reconfiguring the system. The pictorial display, the multifunction control interfaces collocated with the system display, and the procedures integrated with the status information all had shorter event processing times and lower subjective workloads.

Summers, Leland G.

1988-01-01

314

Extensible Operating System Security.  

National Technical Information Service (NTIS)

The EXOS project investigated the practical application of security to extensible operating systems. The project leaders investigated how security policies should be represented and supported in extensible systems, concluding that classical policy models ...

D. Hollingworth T. Redmond R. Rice

2002-01-01

315

Airport Security System.  

National Technical Information Service (NTIS)

An airport security system includes a scanner scanning and time stamping an article of identification of an individual passing into a secure terminal area. The system further includes security cameras generating respective video signals of overlapping zon...

G. Orlas

2005-01-01

316

Tharsis Basin Aquifer System  

NSDL National Science Digital Library

This is a QuickTime movie animating an enormous ancient drainage basin and aquifer system in the Tharsis region of Mars. The movie shows the geological stages of the aquifer system, as reported in a University of Arizona study.

Arizona, University O.; Spaceref.com

317

Fog Simulator System Modification.  

National Technical Information Service (NTIS)

The report deals with the modification of the daytime fog simulator system. In order to improve its effectiveness to realistically simulate actual fog, several changes have been incorporated into the unit. The fog simulator system and the modifications to...

A. Sussman

1973-01-01

318

Criticality accident alarm system.  

National Technical Information Service (NTIS)

The American National Standard ANSI/ANS-8.3-1986, Criticality Accident Alarm System provides guidance for the establishment and maintenance of an alarm system to initiate personnel evacuation in the event of inadvertent criticality. In addition to identif...

R. E. Malenfant

1991-01-01

319

Intermediate water recovery system  

NASA Technical Reports Server (NTRS)

A water recovery system for collecting, storing, and processing urine, wash water, and humidity condensates from a crew of three aboard a spacecraft is described. The results of a 30-day test performed on a breadboard system are presented. The intermediate water recovery system produced clear, sterile, water with a 96.4 percent recovery rate from the processed urine. Recommendations for improving the system are included.

Deckman, G.; Anderson, A. R. (editor)

1973-01-01

320

Space power systems technology  

NASA Technical Reports Server (NTRS)

Reported here is a series of studies which examine several potential catalysts and electrodes for some fuel cell systems, some materials for space applications, and mathematical modeling and performance predictions for some solid oxide fuel cells and electrolyzers. The fuel cell systems have a potential for terrestrial applications in addition to solar energy conversion in space applications. Catalysts and electrodes for phosphoric acid fuel cell systems and for polymer electrolyte membrane (PEM) fuel cell and electrolyzer systems were examined.

Coulman, George A.

1994-01-01

321

Earth System Science  

NSDL National Science Digital Library

Understanding climate requires understanding that Earth is a holistic system of dynamic, interacting components. Furthermore, understanding how the Earth system works is essential for making informed decisions about how to manage, protect, and sustain our planet and its natural resources. This EarthLabs module helps students understand their world as an interconnected living system. Students learn to identify the parts of the Earth system and the processes that connect them, starting locally and gradually expanding their view to regional and global scales.

Bardar, Erin; Haddad, Nick

322

Lithium battery management system  

DOEpatents

Provided is a system for managing a lithium battery system having a plurality of cells. The battery system comprises a variable-resistance element electrically connected to a cell and located proximate a portion of the cell; and a device for determining, utilizing the variable-resistance element, whether the temperature of the cell has exceeded a predetermined threshold. A method of managing the temperature of a lithium battery system is also included.

Dougherty, Thomas J. (Waukesha, WI)

2012-05-08

323

A Home Automation System  

Microsoft Academic Search

A Home Automation (HA) System based on the Home Bus system has been developed. The system has a multi-layered hierachical structure and is composed of four subsystems (the Room Monitor Control Subsystem, the Telephone Subsystem, the Tele-control Subsystem and the In-house Video Control Subsystem). The HA system has both three inner-subsystem communication codes and one inter-subsystem communication code. The former

Masahiro Inoue; Kazuho Uemura; Yoshiji Minagawa; Mitsunobu Esaki; Yoshiyuki Honda

1985-01-01

324

Electronic performance support systems  

Microsoft Academic Search

Electronic Performance Support Systems (EPSS) are computer-based, multimedia systems that are a key to enhancing mission effectiveness in the 90's. Multimedia systems provide for the integration of visual-intensive data in the form of digital video as well as vectorized, colorized graphics with the standard text and line-graphics normally found in maintenance data. EPSS-based maintenance systems allow captured expert knowledge to

R. M. Bond

1993-01-01

325

Complex Systems in Spaceflight  

Microsoft Academic Search

\\u000a Complex systems require detailed system engineering for their design, construction, verification, and finally for testing\\u000a their completion and final validation. For many years system engineering has been supported by computer based system simulation\\u000a techniques. In fact, as early as the Apollo program, NASA and its contractors applied such methods. However with today's significantly\\u000a more powerful computers and sophisticated software tools,

Jens Eickhoff

326

TMACS system description  

SciTech Connect

This document provides a description of the Tank Monitor and Control System (TMACS). It is intended as an introduction for those persons unfamiliar with the system as well as a reference document for the users, maintenance personnel, and system designers. In addition to describing the system, the document outlines the associated drawing documentation, provides maintenance and spare parts information, and discusses other TMACS documents that provide additional detail

Scaief, C.C.

1995-10-17

327

MPD arcjet system  

NASA Technical Reports Server (NTRS)

The current status and future prospects of the magnetoplasmadynamic (MPD) arcjet system are described. Recent research activities on the chemical rocket and electric propulsion are discussed. The characteristics of various MPD arcjet systems including the Komaba-I system developed by the Institute of Space and Astronautical Science of the Tokyo University are analyzed. The applications of the MPD arcjet system to the satellite test, lunar mission, free flyer test, space station test, and heliospheric exploration are discussed.

Kuriki, K.

1987-01-01

328

Digital communication systems  

NASA Astrophysics Data System (ADS)

The fundamental principles of digital communication and the design of practical digital communication systems are explored in an introductory textbook for senior and graduate students of electrical engineering. Chapters are devoted to sampling principles, baseband digital waveforms, baseband digital systems, bandpass binary digital systems, and M-ary digital systems. Deterministic signals, networks, and random-signal theory are reviewed in extensive appendices, and graphs, flow charts, diagrams, and problems are provided.

Peebles, Peyton Z., Jr.

329

What is Systems Biology?  

PubMed Central

Systems biology is increasingly popular, but to many biologists it remains unclear what this new discipline actually encompasses. This brief personal perspective starts by outlining the asthetic qualities that motivate systems biologists, discusses which activities do not belong to the core of systems biology, and finally explores the crucial link with synthetic biology. It concludes by attempting to define systems biology as the research endeavor that aims at providing the scientific foundation for successful synthetic biology.

Breitling, Rainer

2010-01-01

330

Goddard Ground System Environment  

NASA Technical Reports Server (NTRS)

This slide presentation reviews the Goddard Mission Services Evolution Center's work in providing the Ground System Infrastructure to allow for standard interfaces, and allow for a mix of heritage and new components. This software has been used by NASA and other Government users. Telemetry and command services are also provided as are mission planning and scheduling systems. Other areas that the presentation covers are work on trending systems, and data management system.

Liu, Ben

2009-01-01

331

Portable Dental System  

NASA Technical Reports Server (NTRS)

Portable dental system provides dental care in isolated communities. System includes a patient's chair and a dentist's stool, an X-ray machine and a power unit, all of which fold into compact packages. A large yellow "pumpkin" is a collapsible compressed air tank. Portable system has been used successfully in South America in out of the way communities with this back-packable system, and in American nursing homes. This product is no longer manufactured.

1980-01-01

332

Visual Alert System  

NASA Technical Reports Server (NTRS)

A visual alert system resulted from circuitry developed by Applied Cybernetics Systems for Langley as part of a space related telemetry system. James Campman, Applied Cybernetics president, left the company and founded Grace Industries, Inc. to manufacture security devices based on the Langley technology. His visual alert system combines visual and audible alerts for hearing impaired people. The company also manufactures an arson detection device called the electronic nose, and is currently researching additional applications of the NASA technology.

1985-01-01

333

Laser pulse synthesis system  

US Patent & Trademark Office Database

A laser pulse synthesis system is provided. A further aspect of the present system uses a phase-only modulator to measure ultrashort laser pulses. An additional aspect achieves interferences between split subpulses even though the subpulses have different frequencies. Yet another aspect of a laser system employs multi-comb phase shaping of a laser pulse. In another aspect, a laser system includes pulse characterization and arbitrary or variable waveform generation through spectral phase comb shaping.

2014-03-18

334

Space shuttle revitalization system  

NASA Technical Reports Server (NTRS)

The Space Shuttle air revitalization system is discussed. The sequential steps in loop closure are examined and a schematic outline of the regenerative air revitalization system is presented. Carbon dioxide reduction subsystem concepts are compared. Schemes are drawn for: static feedwater electrolysis cell, solid polymer electrolyte water electrolysis cell, air revitalization system, nitrogen generation reactions, nitrogen subsystem staging, vapor compression distillation subsystem, thermoelectric integrated membrane evaporation subsystem, catalytic distillation water reclamation subsystem, and space shuttle solid waste management system.

Quattrone, P. D.

1985-01-01

335

Designing Controllable Computer Systems  

Microsoft Academic Search

Adaptive control theory is emerging as a viable approach for the design of self-managed computer systems. This paper argues that the systems community should not be concerned with the design of adaptive controllersóthere are off-the-shelf controllers that can be used to tune any system that abides by certain properties. Systems research should instead be focusing on the open problem of

Christos T. Karamanolis; Magnus Karlsson; Xiaoyun Zhu

2005-01-01

336

Thermochemical energy systems research  

NASA Astrophysics Data System (ADS)

Research on Heat-pump thermochemical energy systems and thermochemical reduction of CO2 to CO for open-loop solar energy transport is described. Analysis of the NaOH-H2O heat-pumped system indicted cost effectiveness relative to hot oil solar system with parabolic trough receivers for production of 0.101 MPa saturated steam high-temperature heat-pumped systems are being defined.

Nix, R. G.

1983-08-01

337

Systems Engineering and Complexity  

Microsoft Academic Search

The interaction between the fields of systems engineering and complexity theory is only beginning. This paper quickly explores the two fields to seek the relationship between them. Systems engineering is usually defined in terms of the activities that are used in the field: mission\\/purpose definition, requirements engineering, system architecting, system implementation, technical analysis, technical management\\/leadership, scope management, and verification\\/validation. Complexity

Eric Honour

338

Conceptual Framework Approach for System-of-Systems Software Developments.  

National Technical Information Service (NTIS)

The Department of Defense looks increasingly towards an interoperable and integrated system-of-systems to provide required military capability. Non- essential software complexity of a system-of-systems can have a greater negative impact in system behavior...

D. S. Caffall

2003-01-01

339

SI System of Measurements  

NSDL National Science Digital Library

This PDF document is a quick reference for the International System of Units (SI). SI is a "globally accepted standard for measurements in science and for economic trade." SI is also known as the metric system. This sheet explains the fundamentals of this system of measurement and will serve as a useful reference for many science or mathematics classes.

2012-04-02

340

A Miniature Turbocompressor System  

Microsoft Academic Search

The trend in compressors for fuel cells, heat pumps, aerospace and automotive air pressurization, heating, ventilation and air conditioning systems, is towards ultra-compact size and high efficiency. This can be achieved by increasing the rotational speed and employing new electrical drive system technology and materials. This paper presents a miniature, electrically driven turbocompressor system running at a speed of 500

C. Zwyssig; D. Krähenbühl; H. Weser; J. W. Kolar

341

Understanding Trust Management Systems  

Microsoft Academic Search

This paper presents a mathematical framework for ex- pressing trust management systems. The framework makes it easier to understand existing systems and to compare them to one another, as well as to design new systems. The framework defines the semantics of a trust management en- gine via a least fixpoint in a lattice, which, in some situa- tions, leads to

2001-01-01

342

How to trust systems  

Microsoft Academic Search

The owners and users of distributed systems need to trust components of the system from a security point of view. In this paper we investigate the possible methods for establishing trust in the security features of an IT product or system.

Audun Jøsang; F. Van Laenen; Svein J. Knapskog; Joos Vandewalle

1997-01-01

343

Arkansas Technology Information System.  

ERIC Educational Resources Information Center

The Arkansas Technology Information System (ARTIS) was developed to fill a significant void in existing systems of technical support to Arkansans with disabilities by creating and maintaining a consumer-responsive statewide system of data storage and retrieval regarding assistive technology and services. ARTIS goals also include establishment of a…

VanBiervliet, Alan; Parette, Howard P., Jr.

344

Special Education Resource System.  

ERIC Educational Resources Information Center

The guide to the Special Education Resource System (SERS) of the Flour Bluff (Texas) school system contains policies and procedures regarding organization, services, and process of the system. Noted is the SERS purpose of providing information and access to appropriate instructional media and materials for special education personnel. Briefly…

Kampert, George J.

345

Coordination of Redundant Systems.  

National Technical Information Service (NTIS)

The research described in here covers several phases of the design of a control system for a robotic manipulator. The approach followed was: starting from a given system or setup, the system was studied and understood and this resulted in a model, after w...

M. R. A. Brunt

1998-01-01

346

Redundant data management system  

NASA Technical Reports Server (NTRS)

Redundant data management system solves problem of operating redundant equipment in real time environment where failures are detected, isolated, and switched in simple manner. System consists of quadruply-redundant computer, input/output control units, and data buses. System inherently contains failure detection, isolation, and switching function.

Hall, J. R.

1972-01-01

347

Experimental lithium system experience  

Microsoft Academic Search

The Experimental Lithium System is a test loop built to support design and operation of the Fusion Test Facility. ELS has achieved over 15,000 hours of safe and reliable operation. An extensive test program has demonstrated satisfactory performance of the system components, including an electromagnetic pump, lithium jet target, and vacuum system. Data on materials corrosion and behavior of lithium

J. M. Atwood; J. D. Berg; R. Kolowith; W. C. Miller

1983-01-01

348

Evaluating Recommender Systems  

Microsoft Academic Search

Recommender systems are considered as an answer to the information overload in a Web environment. Such systems recommend items (movies, music, books, news, web pages, etc.) that the user should be interested in. Collaborative filtering recommender systems have a huge success in commercial applications. The sales in these applications follow a power law distribution. However, with the increase of the

Zied Zaier; Robert Godin; Luc Faucher

2008-01-01

349

The Xbox recommender system  

Microsoft Academic Search

A recent addition to Microsoft's Xbox Live Marketplace is a recommender system which allows users to explore both movies and games in a personalized context. The system largely relies on implicit feedback, and runs on a large scale, serving tens of millions of daily users. We describe the system design, and review the core recommendation algorithm.

Noam Koenigstein; Nir Nice; Ulrich Paquet; Nir Schleyen

2012-01-01

350

Instrumented Sensor System Architecture  

Microsoft Academic Search

Sensor systems are becoming ubiquitous throughout society, yet their design, construction, and operation are still more of an art than a science. In this paper, we define, develop, and apply a formal se mantics for sensor systems that provides a theoretical framework for an integrated software architecture for modeling sensor-based con trol systems. Our goal is to develop a design

Mohamed Dekhil; Thomas C. Henderson

1998-01-01

351

A Microbiology Information System  

PubMed Central

This paper describes a microbiology information system which is integrated into a general purpose laboratory information system as well as into the normal workflow of the microbiology laboratory. Data entry using “customized” terminal keyboards greatly simplify technologists interaction with the system allowing direct entry of results at each workstation. Results are reported in a user oriented format utilizing full English description of all terms.

Peebles, James E.; Ryan, Kenneth J.

1980-01-01

352

The Open Systems University.  

ERIC Educational Resources Information Center

The purpose of this paper is focused toward a systems understanding of the contemporary university, the American University being the data base. A general systems conceptualization called the open systems university is presented. Comprehensive and generic in character, it is hoped that the theory of the open university will be viable enough to…

Counelis, James Steve

353

Extended Ane Root Systems  

Microsoft Academic Search

There are two notions of the extended ane root systems in the literature which both are introduced axiomatically. One, extended ane root system (SAERS for short), consists only of nonisotropic roots, while the other, extended ane root system (EARS for short), contains certain isotropic roots too. We show that there is a one to one correspondence between (reduced) SEARSs and

Saeid Azam

2002-01-01

354

OPLAN Consultant System.  

National Technical Information Service (NTIS)

CKLOG (Calculus for Knowledge in LOGic) is a system used for knowledge representation an problem solving in OPLAN-CONSULTANT, and expert system for Naval Operational Planning. The CKLOG System and The User Interface are both written in Common Lisp and run...

1988-01-01

355

Firefighter's Breathing System  

NASA Technical Reports Server (NTRS)

System, based on open-loop demand-type compressed air concept, is lighter and less bulky than former systems, yet still provides thirty minutes of air supply. Comfort, visibility, donning time, and breathing resistance have been improved. Apparatus is simple to recharge and maintain and is comparable in cost to previously available systems.

Mclaughlan, P. B.; Giorgini, E. A.; Sullivan, J. L.; Simmonds, M. R.; Beck, E. J.

1976-01-01

356

Training Management System  

ERIC Educational Resources Information Center

This paper describes a training management system developed by the Center for Development of Social Services. It is a set of practical, systematic procedures designed to manage and evaluate training programs. It is a complete model that meets the necessary criteria for competency-based training system. The system integrates the complex procedures…

McCowan, Richard J.

1998-01-01

357

Lightweight Monorail Transport System  

NASA Technical Reports Server (NTRS)

Report proposes monorail transportation system for zero-gravity environment. System carries materials and parts between locations on space station. Includes tubular rails instead of open channels usually found in overhead conveyor systems. Since resistance to torque of closed tube greater than that of open channel for same amount of material, tubular monorail designed for higher loads or for greater spacing between support points.

Weir, Harold F.; Wood, Kenneth E.; Strecker, Myron T.

1987-01-01

358

Insurance agent contact system  

US Patent & Trademark Office Database

An online insurance information system comprises an insurance quoting system, an agent contact system, agent systems, and customer systems. The agent contact system comprises a customer interfacing subsystem, a create contact engine, an agent interfacing subsystem, and a process contact engine. The customer interfacing subsystem is coupled to the quoting system and to a given one of the customer systems for receiving an online indication by a given customer of a desire to pursue a policy with a given agent. The given customer comprises a given contact. The create contact engine identifies the given agent system and saves in a database local to the agent contact system a personal insurance profile and contact information corresponding to the given customer. The agent interfacing subsystem coupled to the given agent system receives an online indication by the given agent of a desire to view, print, or modify the contact information. The process contact engine contacts the given agent system with information regarding the given contact, and accesses and modifies the contact information in accordance with online indications made by the agent.

2009-12-29

359

Systems engineering management plans  

Microsoft Academic Search

The Systems Engineering Management Plan (SEMP) is a comprehensive and effective tool used to assist in the management of systems engineering efforts. It is intended to guide the work of all those involved in the project. The SEMP is comprised of three main sections: technical project planning and control, systems engineering process, and engineering specialty integration. The contents of each

Tamara S

2009-01-01

360

Contracting for Telecommunications Systems.  

ERIC Educational Resources Information Center

Reasons for changing telephone systems at colleges and universities and the preparation and evaluation of requests for proposals (RFP) are discussed. The negotiation and monitoring of the contract are also addressed. It is noted that contracting for a new telecommunications system is extremely complex. Reasons for changing systems include cost…

Brautigam, Arthur W.

1984-01-01

361

Interactive music composition system  

Microsoft Academic Search

The purpose of this study is to construct an interactive system which composes a musical work satisfying each user. This study makes a great importance to human subjectivity toward music, and constructs a music composition system reflecting each user's feeling. The system uses 3 types of user evaluations toward music to generate 16-bars musical work. The interactive genetic algorithm is

M. Unehara; T. Onisawa

2002-01-01

362

Dynamics of Multibody Systems  

Microsoft Academic Search

Dynamics of Multibody Systems introduces multibody dynamics, with an emphasis on flexible body dynamics. Many common mechanisms such as automobiles, space structures, robots, and micro machines have mechanical and structural systems that consist of interconnected rigid and deformable components. The dynamics of these large-scale, multibody systems are highly nonlinear, presenting complex problems that in most cases can only be solved

Ahmed A. Shabana

2005-01-01

363

Complex systems and valuation  

Microsoft Academic Search

Ecological and economic systems are undeniably complex. Whereas a goal of delineating ‘ecosystem services’ is to make readily apparent some of the important ways in which ecosystems underpin human welfare, insights are also gained by appreciating the nonlinear dynamic properties of ecosystems. In this paper, we review some of the relevant characteristics of complex systems. Ecosystems and economic systems share

Karin E. Limburg; Robert V. O'neill; Robert Costanza; Stephen Farber

2002-01-01

364

Economical space power systems  

NASA Astrophysics Data System (ADS)

A commercial approach to design and fabrication of an economical space power system is investigated. Cost projections are based on a 2 kW space power system conceptual design taking into consideration the capability for serviceability, constraints of operation in space, and commercial production engineering approaches. A breakdown of the system design, documentation, fabrication, and reliability and quality assurance estimated costs are detailed.

Burkholder, J. H.

1980-01-01

365

SNRS component positioning systems  

Microsoft Academic Search

This paper discusses the stationary neutron radiography system (SNRS) with respect to the component positioning systems (CPSs) and the rationale behind their design. As design work is on-going at Science Applications International Corporation, this report gives a current update of progress. The SNRS has four separate radiography bays, Bays 1 through 4. The first three bays have automated positioning systems

K. R. Alvar; K. G. Brown; T. Maung; M. S. Meier; V. J. Orphan

1987-01-01

366

Theory of Coherent Systems  

Microsoft Academic Search

A circuit theory model is derived for coherent radar, communication, sonar and antenna systems. The model involves linear time invariant operators and hence can be thought of as cascaded filters. The model provides insight for such systems not previously available, and it provides a unified approach to the analysis of all the above systems. The analysis is concerned with continuously

W. M. Brown; C. J. Palermo

1962-01-01

367

Energy Systems Laboratory Groundbreaking  

ScienceCinema

INL recently broke ground for a research facility that will house research programs for bioenergy, advanced battery systems, and new hybrid energy systems that integrate renewable, fossil and nuclear energy sources. Here's video from the groundbreaking ceremony for INL's new Energy Systems Laboratory. You can learn more about CAES research at http://www.facebook.com/idahonationallaboratory.

Hill, David; Otter, C.L.; Simpson, Mike; Rogers, J.W.;

2013-05-28

368

Embedded system design  

Microsoft Academic Search

In the past decade the main engine of electronic design automation has been the widespread application of ASICs (Application Specific Integrated Circuits). Present technology supports complete systems on a chip, most often used as so-called embedded systems in an increasing number of applications. Embedded systems pose new design challenges which we believe will be the driving forces of design automation

Raul Camposano; Jörg Wilberg

1996-01-01

369

System integration report  

NASA Technical Reports Server (NTRS)

Several areas that arise from the system integration issue were examined. Intersystem analysis is discussed as it relates to software development, shared data bases and interfaces between TEMPUS and PLAID, shaded graphics rendering systems, object design (BUILD), the TEMPUS animation system, anthropometric lab integration, ongoing TEMPUS support and maintenance, and the impact of UNIX and local workstations on the OSDS environment.

Badler, N. I.; Korein, J. D.; Meyer, C.; Manoochehri, K.; Rovins, J.; Beale, J.; Barr, B.

1985-01-01

370

Systems Thinking 1: Introduction  

NSDL National Science Digital Library

Introduction to the concept of a dynamic system. Includes discussion of system and surroundings and system boundaries. This video is part of the Sustainability Learning Suites, made possible in part by a grant from the National Science Foundation. See 'Learn more about this resource' for Learning Objectives, Assessment, and Activities.

Vanasupa, Linda

371

PERMIT COMPLIANCE SYSTEM (PCS)  

EPA Science Inventory

The Permit Compliance System (PCS) is a computerized management information system which contains data on National Pollutant Discharge Elimination System (NPDES) permit-holding facilities. PCS keeps extensive records on more than 65,000 active water-discharge permits on sites loc...

372

Retractable Bit System.  

National Technical Information Service (NTIS)

A prototype retractable bit system was developed consisting of a one-piece replaceable diamond set bit, a modified core barrel, bit changing tools, and surface components that allow activation of the system. Drilling with the retractable bit system is con...

W. W. Svendsen R. E. Cozad J. F. Hoffmeister

1980-01-01

373

Microelectronics bioinstrumentation systems  

NASA Technical Reports Server (NTRS)

Microelectronic bioinstrumentation systems to be employed in the Cardiovascular Deconditioning Program were developed. Implantable telemetry systems for long-term monitoring of animals on earth were designed to collect physiological data necessary for the understanding of the mechanisms of cardiovascular deconditioning. In-flight instrumentation systems, microelectronic instruments, and RF powering techniques for other life science experiments in the NASA program were studied.

Ko, W. H.

1977-01-01

374

NPOx Decontamination System  

SciTech Connect

The nitric acid/potassium permanganate/oxalic acid (NPOx) Phase II system is being prepared for remote operation at the Idaho National Engineering and Environmental Laboratory (INEEL). Several tests have been conducted to prepare the system for remote operation. This system performs very well with high decontamination efficiencies and very low quantities of waste generated during decontamination.

Archibald, K.; Demmer, R.; Argyle, M.; Ancho, M.; Hai-Pao, J.

2002-02-25

375

The EPA Library System.  

ERIC Educational Resources Information Center

Discusses the development of the U.S. Environmental Protection Agency (EPA) Library System from the viewpoint of a field librarian. Coverage includes how and why the system was formed, factors in achieving cooperation from component libraries, and features of the system. (JPF)

Seidman, Ruth K.

1978-01-01

376

Solar water heating system  

Microsoft Academic Search

A solar water heating system is described in which piping arrangements and solenoid operated valves are combined with a water storage heater and solar heater or collectors in a manner to protect the system against over temperature and against freezing without the use of antifreeze or auxiliary heat exchanger systems.

Cook

1978-01-01

377

Mass Storage Systems.  

ERIC Educational Resources Information Center

Presents an overview of the mass storage market and discusses mass storage systems as part of computer networks. Systems for personal computers, workstations, minicomputers, and mainframe computers are described; file servers are explained; system integration issues are raised; and future possibilities are suggested. (LRW)

Ranade, Sanjay; Schraeder, Jeff

1991-01-01

378

A File Archival System  

NASA Technical Reports Server (NTRS)

ARCH, file archival system for DEC VAX, provides for easy offline storage and retrieval of arbitrary files on DEC VAX system. System designed to eliminate situations that tie up disk space and lead to confusion when different programers develop different versions of same programs and associated files.

Fanselow, J. L.; Vavrus, J. L.

1984-01-01

379

Classification of agroforestry systems  

Microsoft Academic Search

Classification of agroforestry (AF) systems is necessary in order to provide a framework for evaluating systems and developing action plans for their improvement. The AF Systems Inventory (AFSI) being undertaken by ICRAF provides the background information for an approach to classification.

P. K. R. Nair

1985-01-01

380

PIPELINE CORROSIVITY MONITORING SYSTEM  

Microsoft Academic Search

A water corrosivity sensing system is currently under development that has the potential to combine the strengths of rate measurement techniques such as linear polarization resistance with longer-term cumulative damage measurements typically provided by electrical resistance probes. This sensor technology is applicable not only to water pipeline systems, but a broad range of liquid and gas piping systems used in

Nathan K. Brown; Fritz J. Friedersdorf

381

Tree Pattern Rewriting Systems  

Microsoft Academic Search

Classical verification often uses abstraction when dealing with data. On the other hand, dynamic XML-based applications have become pervasive, for instance with the ever growing importance of web services. We define here Tree Pattern Rewriting Systems (TPRS) as an abstract model of dynamic XML-based documents. TPRS systems gener- ate infinite transition systems, where states are unranked and unordered trees (hence

Blaise Genest; Anca Muscholl; Olivier Serre; Marc Zeitoun

2008-01-01

382

Autoconfigurable distributed control systems  

Microsoft Academic Search

This paper discusses ongoing research on automatically configurable distributed control systems. We are investigating the use of networks of relatively small controllers that contain intelligence and communication capabilities to perform factory automation. These systems are expected to be more robust, adaptable and flexible than conventional designs. To achieve these benefits, fundamental changes in the underlying control system architecture are needed.

J. Agre; L. Clare; J. Lee; B. Brandin; J. Hoskins; M. Perrone

1995-01-01

383

Jupiter System Observer  

NASA Technical Reports Server (NTRS)

This slide presentation reviews the scientific philosophy that is guiding the planning behind the Jupiter System Observer (JSO). The JSO would be a long-term platform for studying Jupiter and the complete Jovian system. The goal is to advance the understanding of the fundamental processes of planetary systems, their formation and evolution.

Senske, Dave; Prockter, Louise

2008-01-01

384

Modeling AGV systems  

Microsoft Academic Search

Computer simulation is often used as an analysis tool during the design of Automated Guided Vehicle (AGV) systems. However, because of the complexities inherent in automated material handling systems, general-purpose simulation languages must be used creatively to capture the desired detail in the model. This paper presents some general concepts which can be used to model AGV systems. Also, some

Deborah A. Davis; Calder Sq

1986-01-01

385

Expert Systems: A Tutorial.  

ERIC Educational Resources Information Center

Overview of expert systems (intelligent computer applications that use data, a knowledge base, and a control mechanism to solve problems) highlights history of expert systems; construction (human element, knowledge acquisition and learning, system architecture); limitations; issues and trends; and implications for information science. Thirty-three…

Yaghmai, N. Shahla; Maxin, Jacqueline A.

1984-01-01

386

Extensible database management systems  

Microsoft Academic Search

Work in the area of extensible database management systems addresses two problems with today's (primarily relational) DBMSs. First, current systems are lacking when it comes to meeting the needs of emerging applications such as CAD\\/CAM, multi-media office systems, image management, statistical data management, and text manipulation. Such applications require support for new data types, functions, complex objects, storage techniques, and

Michael J. Carey; Laura M. Haas

1990-01-01

387

Solving Systems of Equations  

NSDL National Science Digital Library

Learn how to solve systems of linear equations by graphing, substitution, and elimination. As we discovered in our Pet Sitters Unit, systems of equations are a useful way to model and solve real-world situations in business. They are also useful in science and social science applications. This online unit will help you become an expert at solving systems of linear equations. 1) ...

Ball, Mrs.

2012-09-13

388

LCLS Undulator Coordinate System  

SciTech Connect

This note defines the LCLS undulator coordinate system and relates that coordinate system to the linear accelerator coordinate system. The slight downward pitch of the SLAC linac and the finite radius of the Earth necessitate some choices and definitions for the undulator layout which is described here. The layout described is consistent with the LCLS optics MAD file ''LCLS13APR04''.

Bong, E.

2005-01-31

389

Satellite power systems technology  

Microsoft Academic Search

The development emphasis of the next decade in electrical power systems for satellites will be to provide larger amounts of electrical power with dramatically improved power system performance. Reliability, survivability, adaptability, scalability and endurability will continue to be important power system technology considerations for most missions. This paper addresses increasing power trends seen for future satellite missions, describes the current

R. R. Barthelemy; L. D. Massie

1984-01-01

390

Satellite power system simulation  

Microsoft Academic Search

In order to furnish a useful tool for the power system preliminary sizing, a satellite power system simulator was developed. The simulator has a modular structure where each module implements the mathematical model of the system components (solar array, battery, voltage regulators etc.). The software allows both the verification of the rating co-ordination of all those parts composing the power

G. Colombo; U. Grasselli; A. De Luca; A. Spizzichino; S. Falzini

1997-01-01

391

The Lincoln Training System  

Microsoft Academic Search

LTS (Lincoln Training System) is an automated training system that has been designed to meet the need for individualized, selfpaced learning outside of as well as within a conventional classroom environment. The system employs microfiche as the basic medium for storing and distributing instructional material. A solid-state electrooptical reader has been developed to permit storage of audio and branching logic

LEONARD M. GOODMAN; J. ROYCE BROWN; FREDERICK C. FRICK; WILLIAM P. HARRIS; DAVID KARP; RAYMOND R. LAFREY

1973-01-01

392

Cooling Water Systems Module  

NSDL National Science Digital Library

The Center for the Advancement of Process Technology presents this free sample module on cooling water systems in the process industry. The material includes 21 slides and will help learners understand related terms, the purpose of the basic equipment involved in cooling water systems and the safety, health and environmental concerns involved with these systems.

2013-01-04

393

Polymorphic effect systems  

Microsoft Academic Search

We present a new approach to programming languages for parallel computers that uses an effect system to discover expression scheduling constraints. This effect system is part of a 'kinded' type system with three base kinds: types, which describe the value that an expression may return; effects, which describe the side-effects that an expression may have; and regions, which describe the

John M. Lucassen; David K. Gifford

1988-01-01

394

Construction Diver Lift Systems.  

National Technical Information Service (NTIS)

A diver-operated lift system has been developed for underwater construction divers. The system consists of three different open-bottom lift bags with the following lift ranges: 200 to 550 pounds, 500 to 1,250 pounds, and 1,000 to 3,000 pounds. The system ...

H. G. Thomson

1993-01-01

395

Unified Science - System.  

ERIC Educational Resources Information Center

The goals of this curriculum, developed as a summer course for the Young Scholars Program at The Ohio State University-Columbus, are as follows: (1) enable students to develop an understanding of the concept of a system; (2) help students gain an appreciation of the value of systems; (3) develop skills in working with systems; (4) expand skills in…

Thomson, Barbara S.

396

Engineering pluripotent information systems  

Microsoft Academic Search

A pluripotent information system is an open and distributed information system that (i) automatically adapts at runtime to changing operating conditions, and (ii) satisfies both the requirements anticipated at development time, and those unanticipated before but relevant at runtime. Engineering pluripotency into an information system therefore responds to two recurring critical issues: (i) the need for adaptability given the uncertainty

Ivan J. Jureta; Stéphane Faulkner; Jean Vanderdonckt

2008-01-01

397

The system architect's workbench  

Microsoft Academic Search

This paper presents an overview of The System Architect's Workbench, a behavioral synthesis system under development at Carnegie Mellon University. This system converts an abstract behavioral description of a piece of hardware into a set of register-transfer components and a control sequence table. Two-synthesis methodologies are supported: one is tuned specifically to design microprocessors, and the other supports a more

Donald E. Thomas; Elizabeth M. Dirkes; Robert A. Walker; Jayanth V. Rajan; John A. Nestor; Robert L. Blackburn

1988-01-01

398

Energy Systems Laboratory Groundbreaking  

ScienceCinema

INL recently broke ground for a research facility that will house research programs for bioenergy, advanced battery systems, and new hybrid energy systems that integrate renewable, fossil and nuclear energy sources. Here's video from the groundbreaking ceremony for INL's new Energy Systems Laboratory. You can learn more about CAES research at http://www.facebook.com/idahonationallaboratory.

399

Petrographic image logging system  

Microsoft Academic Search

The Petrographic Image Logging System (PILS) is a logging system data base for Macintosh computers that allows the merging of traditional wire-line, core, and mud log data with petrographic images. The system is flexible; it allows the user to record, manipulate, and display almost any type of character, graphic, and image information. Character and graphic data are linked and entry

C. J. Payne; M. R. Ulrich; G. B. Maxwell; J. P. Adams

1991-01-01

400

AIR QUALITY MONITORING SYSTEM  

Microsoft Academic Search

Detection of low concentration of air pollution, like cigarette smoke, cooking fumes, etc. is possible with the combination of an air quality sensor and data acquisition system. In present paper is presented approach for design and implementation of air quality monitoring system based on tin dioxide gas sensor, integrated temperature and humidity sensors, portable modular data acquisition system and graphical

Boyanka Marinova Nikolova; Marin Berov Marinov; Georgi Todorov Nikolov

401

Idaho Explosives Detection System  

Microsoft Academic Search

The Idaho Explosives Detection System was developed at the Idaho National Laboratory (INL) to respond to threats imposed by delivery trucks potentially carrying explosives into military bases. A full-scale prototype system has been built and is currently undergoing testing. The system consists of two racks, one on each side of a subject vehicle. Each rack includes a neutron generator and

Edward L. Reber; Larry G. Blackwood; Andrew J. Edwards; J. Keith Jewell; Kenneth W. Rohde; Edward H. Seabury; Jeffery B. Klinger

2005-01-01

402

NUCLEAR REACTOR SAFETY SYSTEMS  

Microsoft Academic Search

A nuclear reactor safety system is designed to provide an automatic ; safeguard for the reactor under fault conditions. It is also important that the ; safety system does not generate faults of its own. The basic layout of a safety ; system is described, and it is shown that application of the principles of ; coincidence and redundancy to

Jervis

1962-01-01

403

Distributed operating systems  

Microsoft Academic Search

Distributed operating systems have many aspects in common with centralized ones, but they also differ in certain ways. This paper is intended as an introduction to distributed operating systems, and especially to current university research about them. After a discussion of what constitutes a distributed operating system and how it is distinguished from a computer network, various key design issues

Andrew S. Tanenbaum; Robbert Van Renesse

1985-01-01

404

Temporal database system implementations  

Microsoft Academic Search

Although research on temporal database systems has been active for about 20 years, implementations have not appeared until recently. This is one reason why current commercial database systems provide only limited temporal functionality. This paper summarizes extant state of the art of temporal database implementations. Rather than being very specific about each system we have attempted to provide an indication

Michael H. Böhlen

1995-01-01

405

IEEE Reliability Test System  

Microsoft Academic Search

This report describes a load model, generation system, and transmission network which can be used to test or compare methods for reliability analysis of power systems. The objective is to define a system sufficiently broad to provide a basis for reporting on analysis methods for combined generation\\/transmission (composite) reliability.

1979-01-01

406

Desiccant humidity control system  

NASA Technical Reports Server (NTRS)

A regenerable sorbent system was investigated for controlling the humidity and carbon dioxide concentration of the space shuttle cabin atmosphere. The sorbents considered for water and carbon dioxide removal were silica gel and molecular sieves. Bed optimization and preliminary system design are discussed along with system optimization studies and weight penalites.

Amazeen, J. (editor)

1973-01-01

407

Astromag data system concept  

NASA Technical Reports Server (NTRS)

A feasible, top-level data system is defined that could accomplish and support the Astromag Data System functions and interfaces necessary to support the scientific objectives of Astromag. This data system must also be able to function in the environment of the Space Station Freedom Manned Base (SSFMB) and other anticipated NASA elements.

Roos, Darrell; Cheng, Chieh-San; Newsome, Penny; Nath, Nitya

1989-01-01

408

Verifying Hybrid Systems  

Microsoft Academic Search

Hybrid systems are modeled as phase transition systems with sampling semantics. By identifying a set of important events it is ensured that all significant state changes are observed, thus correcting previous drawbacks of the sampling computations semantics. A proof rule for verifying properties of hybrid systems is presented and illustrated on several examples.

Zohar Manna; Amir Pnueli

1992-01-01

409

Timed Transition Systems  

Microsoft Academic Search

We incorporate time into an interleaving model of concurrency. In timed transition systems, the qualitative fairness requirements of traditional transition system are replaced (and superseded) by quantitative lower-bound and upperbound timing constraints on transitions. The purpose of this paper is to explore the scope of applicability for the abstract model of timed transition systems. We demonstrate that the model can

Thomas A. Henzinger; Zohar Manna; Amir Pnueli

1991-01-01

410

Electronic Survey System.  

National Technical Information Service (NTIS)

The feasibility of developing an electronic survey system to determine the positions of locators within a circular area of 10 mi diam was studied. An accuracy of 2 1/2 ft is required of the system. The system analyzed has four reference stations (three sl...

R. S. Goodman

1965-01-01

411

System Documentation Manual.  

ERIC Educational Resources Information Center

The document is a system documentation manual of the Computer-Assisted Teacher Training System (CATTS) developed by the Center for Innovation in Teaching the Handicapped (Indiana University). CATTS is characterized as a system capable of providing continuous, instantaneous, and/or delayed feedback of relevant teacher-student interaction data to a…

Semmel, Melvyn I.; Olson, Jerry

412

Wireless appliance control system  

Microsoft Academic Search

The needs of centralized control system has been long identified in office and industry application. Nevertheless, the same concept can be extended to home application in which a residence can control certain object through a centralized control system. Thus, a wireless appliance control system for home is proposed in this paper. It makes use of the computer as digital control

Rahmat Sanudin; Yoo Tuck Mun; W. S. W. Zaki; M. H. A. Wahab

2009-01-01

413

Energy Systems Laboratory Groundbreaking  

SciTech Connect

INL recently broke ground for a research facility that will house research programs for bioenergy, advanced battery systems, and new hybrid energy systems that integrate renewable, fossil and nuclear energy sources. Here's video from the groundbreaking ceremony for INL's new Energy Systems Laboratory. You can learn more about CAES research at http://www.facebook.com/idahonationallaboratory.

Hill, David; Otter, C.L.; Simpson, Mike; Rogers, J.W.

2011-01-01

414

Thinking in Systems  

NSDL National Science Digital Library

This is a lesson about systems. Learners will use the human body to explore the characteristics of systems. They then choose another system to explore and create a concept map of this system. Finally, they summarize the characteristics of a system. The lesson models scientific inquiry using the 5E instructional model and includes teacher notes, prerequisite concepts, common misconceptions, student journal and reading. This is lesson 7 in the Astro-Venture Astronomy Unit. The lessons are designed for educators to use in conjunction with the Astro-Venture multimedia modules.

415

Positive lubrication system  

NASA Technical Reports Server (NTRS)

As part of the development of an autonomous lubrication system for spin bearings, a system was developed to deliver oil to grease-lubricated bearings upon demand. This positive oil delivery system (PLUS) consists of a pressurized reservoir with a built-in solenoid valve that delivers a predictable quantity of oil to the spin bearing through a system of stainless steel tubes. Considerable testing was performed on the PLUS to characterize its performance and verify its effectiveness, along with qualifying it for flight. Additional development is underway that will lead to the fully autonomous active lubrication system.

Smith, Dennis W.; Hooper, Fred L.

1990-01-01

416

Cross-functional systems  

NASA Technical Reports Server (NTRS)

Many companies, including Xerox and Texas Instruments, are using cross functional systems to deal with the increasingly complex and competitive business environment. However, few firms within the aerospace industry appear to be aware of the significant benefits that cross functional systems can provide. Those benefits are examined and a flexible methodology is discussed that companies can use to identify and develop cross functional systems that will help improve organizational performance. In addition, some of the managerial issues are addressed that cross functional systems may raise and specific examples are used to explore networking's contributions to cross functional systems.

Lee, Mark

1991-01-01

417

Harvard: Systems Research  

NSDL National Science Digital Library

This website features Systems Research at Harvard University. Projects described on this website focus on distributed computing, sensor networks, file systems, and systems integration. Researchers from the System Group also develop educational resources, including a platform for teaching an Introduction to Computer Sciences course and an instructional operating system. The researchers provide overviews of their projects and related publications are available to download. Past projects include a project that explored methodologies for application-specific benchmarking and a project that proposed a framework for developing Web applications with client-side storage.

418

Space engine safety system  

NASA Technical Reports Server (NTRS)

A rocket engine safety system was designed to initiate control procedures to minimize damage to the engine or vehicle or test stand in the event of an engine failure. The features and the implementation issues associated with rocket engine safety systems are discussed, as well as the specific concerns of safety systems applied to a space-based engine and long duration space missions. Examples of safety system features and architectures are given, based on recent safety monitoring investigations conducted for the Space Shuttle Main Engine and for future liquid rocket engines. Also, the general design and implementation process for rocket engine safety systems is presented.

Maul, William A.; Meyer, Claudia M.

1991-01-01

419

Eccentric conical fastening system  

DOEpatents

Fastening systems for parts that endure high vibration shear loads have traditionally been difficult or expensive to produce. This application describes a fastening system with multiple conical surfaces and eccentric offsets. The novel conical fastener system allows parts to be assembled with reduced tolerance controls at interface features while improving alignment precision. The eccentric conical fastening system is particularly well suited for assemblies with high shear loads in high vibration/shock environments, and/or for systems that have extremely precise pointing requirements.

Gawehn, Eric (Mountain View, CA) [Mountain View, CA

2008-11-25

420

FRIB cryogenic distribution system  

SciTech Connect

The Michigan State University Facility for Rare Isotope Beams (MSU-FRIB) helium distribution system has been revised to include bayonet/warm valve type disconnects between each cryomodule and the transfer line distribution system, similar to the Thomas Jefferson National Accelerator Facility (JLab) and the Spallation Neutron Source (SNS) cryogenic distribution systems. The heat loads at various temperature levels and some of the features in the design of the distribution system are outlined. The present status, the plans for fabrication, and the procurement approach for the helium distribution system are also included.

Ganni, Venkatarao [JLAB; Dixon, Kelly D. [JLAB; Laverdure, Nathaniel A. [JLAB; Knudsen, Peter N. [JLAB; Arenius, Dana M. [JLAB; Barrios, Matthew N. [Michigan State; Jones, S. [Michigan State; Johnson, M. [Michigan State; Casagrande, Fabio [Michigan State

2014-01-01

421

Vulnerability of dynamic systems  

NASA Technical Reports Server (NTRS)

Directed graphs are associated with dynamic systems in order to determine in any given system if each state can be reached by at least one input (input reachability), or can each state reach at least one output (output reachability). Then, the structural perturbations of a dynamic system are identified as lines or points removals from the corresponding digraph, and a system is considered vulnerable at those lines or points of the digraph whose removal destroys its input or output reachability. A suitable framework is formulated for resolving the problems of reachability and vulnerability which applies to both linear and nonlinear systems alike.

Siljak, D. D.

1976-01-01

422

Medical Imaging System  

NASA Technical Reports Server (NTRS)

The MD Image System, a true-color image processing system that serves as a diagnostic aid and tool for storage and distribution of images, was developed by Medical Image Management Systems, Huntsville, AL, as a "spinoff from a spinoff." The original spinoff, Geostar 8800, developed by Crystal Image Technologies, Huntsville, incorporates advanced UNIX versions of ELAS (developed by NASA's Earth Resources Laboratory for analysis of Landsat images) for general purpose image processing. The MD Image System is an application of this technology to a medical system that aids in the diagnosis of cancer, and can accept, store and analyze images from other sources such as Magnetic Resonance Imaging.

1991-01-01

423

Text Exchange System  

NASA Technical Reports Server (NTRS)

Text Exchange System (TES) exchanges and maintains organized textual information including source code, documentation, data, and listings. System consists of two computer programs and definition of format for information storage. Comprehensive program used to create, read, and maintain TES files. TES developed to meet three goals: First, easy and efficient exchange of programs and other textual data between similar and dissimilar computer systems via magnetic tape. Second, provide transportable management system for textual information. Third, provide common user interface, over wide variety of computing systems, for all activities associated with text exchange.

Snyder, W. V.; Hanson, R. J.

1986-01-01

424

Systems Biology of Embryogenesis  

PubMed Central

The development of a complete organism from a single cell involves extraordinarily complex orchestration of biological processes that vary intricately across space and time. Systems biology seeks to describe how all elements of a biological system interact in order to understand, model, and ultimately predict aspects of emergent biological processes. Embryogenesis represents an extraordinary opportunity – and challenge – for the application of systems biology. Systems approaches have already been used successfully to study various aspects of development, from complex intracellular networks to 4D models of organogenesis. Going forward, great advancements and discoveries can be expected from systems approaches applied to embryogenesis and developmental biology.

Edelman, Lucas B.; Chandrasekaran, Sriram; Price, Nathan D.

2010-01-01

425

The Saturn System  

NSDL National Science Digital Library

This is a lesson about systems and how they apply to Saturn. Learners will apply the concept of a system to learning about the Saturn system. They work with a ready-made scale diagram of the Saturn system, including the planet, rings, and moons. They then complete a Venn diagram that compares and contrasts the Saturn and EarthâMoon systems in terms of the systemsâ components and interactions. Includes background information, procedure, and extension. This is lesson 1 of 6 in the Saturn Educators Guide.

426

Liver in systemic disease  

PubMed Central

Potential causes of abnormal liver function tests include viral hepatitis, alcohol intake, nonalcoholic fatty liver disease, autoimmune liver diseases, hereditary diseases, hepatobiliary malignancies or infection, gallstones and drug-induced liver injury. Moreover, the liver may be involved in systemic diseases that mainly affect other organs. Therefore, in patients without etiology of liver injury by screening serology and diagnostic imaging, but who have systemic diseases, the abnormal liver function test results might be caused by the systemic disease. In most of these patients, the systemic disease should be treated primarily. However, some patients with systemic disease and severe liver injury or fulminant hepatic failure require intensive treatments of the liver.

Shimizu, Yukihiro

2008-01-01

427

External pressure measurement system  

NASA Astrophysics Data System (ADS)

Hydraulic systems comprise an important part of jet aircraft and their pressure needs must be checked constantly. Tests of the prototype external pressure measurement system show that it is possible to accurately convert the small expansion of tubing with pressure into a direct pressure reading without inserting a pressure gage into the piping system. The tool described in the paper is a clamp-on displacement transducer that can read pressure directly in PSI from 0 to 5000. Some limitations concerning temperature and accuracy should be remedied by additional design work. The system promises to streamline troubleshooting of all types of piping systems.

Chandler, Jon K.; Fowler, Don P.

428

SNS Cryogenic Systems Commissioning  

SciTech Connect

The Spallation Neutron Source (SNS) is under construction at Oak Ridge National Laboratory. The cold section of the Linac consists of 81 superconducting radio frequency cavities cooled to 2.1K by a 2400 watt cryogenic refrigeration system. The major cryogenic system components include warm helium compressors with associated oil removal and gas management, 4.5K cold box, 7000L liquid helium dewar, 2.1K cold box (consisting of 4 stages of cold compressors), gaseous helium storage, helium purification and gas impurity monitoring system, liquid nitrogen storage and the cryogenic distribution transfer line system. The overall system commissioning and future plans will be presented.

D. Hatfield; F. Casagrande; I. Campisi; P. Gurd; M. Howell; D. Stout; H. Strong; D. Arenius; J. Creel; K. Dixon; V. Ganni; and P. Knudsen

2005-08-29

429

Superconductor rotor cooling system  

DOEpatents

A system for cooling a superconductor device includes a cryocooler located in a stationary reference frame and a closed circulation system external to the cryocooler. The closed circulation system interfaces the stationary reference frame with a rotating reference frame in which the superconductor device is located. A method of cooling a superconductor device includes locating a cryocooler in a stationary reference frame, and transferring heat from a superconductor device located in a rotating reference frame to the cryocooler through a closed circulation system external to the cryocooler. The closed circulation system interfaces the stationary reference frame with the rotating reference frame.

Gamble, Bruce B. (Wellesley, MA); Sidi-Yekhlef, Ahmed (Framingham, MA); Schwall, Robert E. (Northborough, MA); Driscoll, David I. (South Euclid, OH); Shoykhet, Boris A. (Beachwood, OH)

2002-01-01

430

The kidney allocation system.  

PubMed

The current kidney allocation system for transplants is outdated and has not evolved to reflect the changing demographics of patients on the waiting list. This article proposes a new system for kidney allocation, which more appropriately incorporates the biology of highly sensitized patients into the waiting-time scoring algorithm. This system will significantly reduce mismatches between possible donor kidney longevity and life expectancy of recipients, and makes incremental advances toward more geographic sharing. The proposed system makes significant progress toward eliminating deficiencies in the current system, and has the potential to increase the supply of available kidneys. PMID:24206858

Friedewald, John J; Samana, Ciara J; Kasiske, Bertram L; Israni, Ajay K; Stewart, Darren; Cherikh, Wida; Formica, Richard N

2013-12-01

431

Business System Planning Project, Preliminary System Design  

SciTech Connect

CH2M HILL Hanford Group, Inc. (CHG) is currently performing many core business functions including, but not limited to, work control, planning, scheduling, cost estimating, procurement, training, and human resources. Other core business functions are managed by or dependent on Project Hanford Management Contractors including, but not limited to, payroll, benefits and pension administration, inventory control, accounts payable, and records management. In addition, CHG has business relationships with its parent company CH2M HILL, U.S. Department of Energy, Office of River Protection and other River Protection Project contractors, government agencies, and vendors. The Business Systems Planning (BSP) Project, under the sponsorship of the CH2M HILL Hanford Group, Inc. Chief Information Officer (CIO), have recommended information system solutions that will support CHG business areas. The Preliminary System Design was developed using the recommendations from the Alternatives Analysis, RPP-6499, Rev 0 and will become the design base for any follow-on implementation projects. The Preliminary System Design will present a high-level system design, providing a high-level overview of the Commercial-Off-The-Shelf (COTS) modules and identify internal and external relationships. This document will not define data structures, user interface components (screens, reports, menus, etc.), business rules or processes. These in-depth activities will be accomplished at implementation planning time.

EVOSEVICH, S.

2000-10-30

432

Stigmatic optical systems.  

PubMed

There would appear to be little disagreement on what constitutes an astigmatic system in the case of a thin lens: the cylinder is not zero. A spherical thin lens is stigmatic or not astigmatic. The issue is less clear in the case of a thick system. For example, is an eye stigmatic merely because its refraction is stigmatic (spherical)? In this article, a system is defined to be stigmatic if and only if, through the system, every point object maps to a point image. Every other system is astigmatic. Thus, a system is astigmatic if and only if there exists a point object for which the image is not a point. This article is restricted to linear optics. The optical character of a system is completely determined by the ray transference of the system. The objective here is to find those conditions on the transference for which the system is stigmatic or astigmatic. The result is that, for a stigmatic system, all the 2 x 2 submatrices are scalar multiples of a common orthogonal matrix. For a system to be stigmatic, it is not sufficient that its power be stigmatic. An eye may be astigmatic despite having a stigmatic refraction. PMID:15592120

Harris, W F

2004-12-01

433

Model-Based Systems  

NASA Technical Reports Server (NTRS)

Engineers, who design systems using text specification documents, focus their work upon the completed system to meet Performance, time and budget goals. Consistency and integrity is difficult to maintain within text documents for a single complex system and more difficult to maintain as several systems are combined into higher-level systems, are maintained over decades, and evolve technically and in performance through updates. This system design approach frequently results in major changes during the system integration and test phase, and in time and budget overruns. Engineers who build system specification documents within a model-based systems environment go a step further and aggregate all of the data. They interrelate all of the data to insure consistency and integrity. After the model is constructed, the various system specification documents are prepared, all from the same database. The consistency and integrity of the model is assured, therefore the consistency and integrity of the various specification documents is insured. This article attempts to define model-based systems relative to such an environment. The intent is to expose the complexity of the enabling problem by outlining what is needed, why it is needed and how needs are being addressed by international standards writing teams.

Frisch, Harold P.

2007-01-01

434

The ILC control system.  

SciTech Connect

Since the last ICALEPCS, a small multi-region team has developed a reference design model for a control system for the International Linear Collider as part of the ILC Global Design Effort. The scale and performance parameters of the ILC accelerator require new thinking in regards to control system design. Technical challenges include the large number of accelerator systems to be controlled, the large scale of the accelerator facility, the high degree of automation needed during accelerator operations, and control system equipment requiring 'Five Nines' availability. The R&D path for high availability touches the control system hardware, software, and overall architecture, and extends beyond traditional interfaces into the technical systems. Software considerations for HA include fault detection through exhaustive out-of-band monitoring and automatic state migration to redundant systems, while the telecom industry's emerging ATCA standard - conceived, specified, and designed for High Availability - is being evaluated for suitability for ILC front-end electronics.

Carwardine, J.; Saunders, C.; Arnold, N.; Lenkszus, F.; Rehlich, K.; Simrock, S.; Banerjee, b.; Chase, B.; Gottschalk, E.; Joireman, P.; Kasley, P.; Lackey, S.; McBride, P.; Pavlicek, V.; Patrick, J.; Votava, M.; Wolbers, S.; Furukawa, K.; Michizono, S.; Larson, R.S.; Downing, R.; DESY; FNAL; SLAC

2007-01-01

435

Secure software distribution system  

SciTech Connect

Authenticating and upgrading system software plays a critical role in information security, yet practical tools for assessing and installing software are lacking in today`s marketplace. The Secure Software Distribution System (SSDS) will provide automated analysis, notification, distribution, and installation of security patches and related software to network-based computer systems in a vendor-independent fashion. SSDS will assist with the authentication of software by comparing the system`s objects with the patch`s objects. SSDS will monitor vendor`s patch sites to determine when new patches are released and will upgrade system software on target systems automatically. This paper describes the design of SSDS. Motivations behind the project, the advantages of SSDS over existing tools as well as the current status of the project are also discussed. 2 figs.

Bartoletti, T.; Dobbs, L.A.; Kelley, M.

1997-02-01

436

Knowledge systems and Prolog  

SciTech Connect

This book is about knowledge systems. It is about how to design them, how to use them, and how to program them in a language called Prolog. A knowledge system is a computer program that solves, or helps to solve, problems that would otherwise have to be handled by a human expert alone. A knowledge system may be an expert system, a program that understands English (or another natural language), or a combination of the two. In addition it may make good use of a database management system to store parts of its knowledge. Knowledge systems are used to give advise and to solve problems in many areas, such as business, science, technology, and law. The knowledge systems described in this book have been developed at IBM, and have been used for experiments in several subjects, including manufacturing planning, communication network management, evaluation of the ease of use of software packages, and machine translation from one natural language to another.

Walker, A.; McCord, M.; Sowa, J.F.; Wilson, W.G.

1987-01-01

437

Space Station information systems  

NASA Technical Reports Server (NTRS)

The space operations information system is defined and characterized in a wide perspective. Interactive subsets of the total system are defined and discussed. Particular attention is paid to the concept of end-to-end systems and their repetitive population within the total system. High level program goals are reviewed and related to more explicit system requirements and user needs. Emphasis is placed on the utility and cost effectiveness of data system services from a user standpoint. Productivity, as a quantitative goal, in both development and operational phases is also addressed. Critical aspects of the approach to successful development of the data management system are discussed along with recommendations important to advanced development activities. Current and planned activity in both technology and advanced development areas are reviewed with emphasis on their importance to program success.

Swingle, W. L.; Mckay, C. W.

1983-01-01

438

Space Station information systems  

NASA Astrophysics Data System (ADS)

The space operations information system is defined and characterized in a wide perspective. Interactive subsets of the total system are defined and discussed. Particular attention is paid to the concept of end-to-end systems and their repetitive population within the total system. High level program goals are reviewed and related to more explicit system requirements and user needs. Emphasis is placed on the utility and cost effectiveness of data system services from a user standpoint. Productivity, as a quantitative goal, in both development and operational phases is also addressed. Critical aspects of the approach to successful development of the data management system are discussed along with recommendations important to advanced development activities. Current and planned activity in both technology and advanced development areas are reviewed with emphasis on their importance to program success.

Swingle, W. L.; McKay, C. W.

1983-07-01

439

Microgravity particle reduction system  

NASA Technical Reports Server (NTRS)

The Controlled Ecological Life Support System (CELSS) project, sponsored by NASA, is assembling the knowledge required to design, construct, and operate a system which will grow and process higher plants in space for the consumption by crew members of a space station on a long term space mission. The problem of processing dry granular organic materials in microgravity is discussed. For the purpose of research and testing, wheat was chosen as the granular material to be ground into flour. Possible systems which were devised to transport wheat grains into the food processor, mill the wheat into flour, and transport the flour to the food preparation system are described. The systems were analyzed and compared and two satisfactory systems were chosen. Prototypes of the two preferred systems are to be fabricated next semester. They will be tested under simulated microgravity conditions and revised for maximum effectiveness.

Brandon, Vanessa; Joslin, Michelle; Mateo, Lili; Tubbs, Tracey

1988-01-01

440

Airborne atmospheric sampling system  

NASA Technical Reports Server (NTRS)

The atmospheric sampling system developed for use on board commercial airliners as part of the Global Atmospheric Sampling Program (GASP) is described. The automated air-constituent measuring system is installed in a Boeing 747 airliner below the passenger cabin floor near the nose wheel well. It consists of an air sample flow system, composed of air inlet and pressurization systems, computerized data acquisition and system control units which direct system operation in 15 modes, and commercial instruments significantly modified to measure low levels of atmospheric constituents (ozone, water vapor, nitrogen oxides, carbon monoxide, chlorofluoromethanes, particulates, condensation nuclei, sulfates and nitrates). Flight and meteorological data, including air temperature and altitude, are also recorded. The system is designed for servicing at 14-day intervals, and to require a minimum of aircrew involvement.

Gustafsson, U. R. C.; Perkins, P. J.; Nyland, T. W.; Tiefermann, M. W.; Dudzinski, T. J.

1979-01-01

441

Power Systems Control Architecture  

SciTech Connect

A diagram provided in the report depicts the complexity of the power systems control architecture used by the national power structure. It shows the structural hierarchy and the relationship of the each system to those other systems interconnected to it. Each of these levels provides a different focus for vulnerability testing and has its own weaknesses. In evaluating each level, of prime concern is what vulnerabilities exist that provide a path into the system, either to cause the system to malfunction or to take control of a field device. An additional vulnerability to consider is can the system be compromised in such a manner that the attacker can obtain critical information about the system and the portion of the national power structure that it controls.

James Davidson

2005-01-01

442

Testing expert systems  

NASA Technical Reports Server (NTRS)

Software quality is of primary concern in all large-scale expert system development efforts. Building appropriate validation and test tools for ensuring software reliability of expert systems is therefore required. The Expert Systems Validation Associate (EVA) is a validation system under development at the Lockheed Artificial Intelligence Center. EVA provides a wide range of validation and test tools to check correctness, consistency, and completeness of an expert system. Testing a major function of EVA. It means executing an expert system with test cases with the intent of finding errors. In this paper, we describe many different types of testing such as function-based testing, structure-based testing, and data-based testing. We describe how appropriate test cases may be selected in order to perform good and thorough testing of an expert system.

Chang, C. L.; Stachowitz, R. A.

1988-01-01

443

Space Nuclear Power Systems  

NASA Technical Reports Server (NTRS)

Fission power and propulsion systems can enable exciting space exploration missions. These include bases on the moon and Mars; and the exploration, development, and utilization of the solar system. In the near-term, fission surface power systems could provide abundant, constant, cost-effective power anywhere on the surface of the Moon or Mars, independent of available sunlight. Affordable access to Mars, the asteroid belt, or other destinations could be provided by nuclear thermal rockets. In the further term, high performance fission power supplies could enable both extremely high power levels on planetary surfaces and fission electric propulsion vehicles for rapid, efficient cargo and crew transfer. Advanced fission propulsion systems could eventually allow routine access to the entire solar system. Fission systems could also enable the utilization of resources within the solar system.

Houts, Michael G.

2012-01-01

444

The Planetary Data System Distributed Inventory System  

NASA Technical Reports Server (NTRS)

The advent of the World Wide Web (Web) and the ability to easily put data repositories on-line has resulted in a proliferation of digital libraries. The heterogeneity of the underlying systems, the autonomy of the individual sites, and distributed nature of the technology has made both interoperability across the sites and the search for resources within a site major research topics. This article will describe a system that addresses both issues using standard Web protocols and meta-data labels to implement an inventory of on-line resources across a group of sites. The success of this system is strongly dependent on the existence of and adherence to a standards architecture that guides the management of meta-data within participating sites.

Hughes, J. Steven; McMahon, Susan K.

1996-01-01

445

Information systems vulnerability: A systems analysis perspective  

SciTech Connect

Vulnerability analyses for information systems are complicated because the systems are often geographically distributed. Sandia National Laboratories has assembled an interdisciplinary team to explore the applicability of probabilistic logic modeling (PLM) techniques (including vulnerability and vital area analysis) to examine the risks associated with networked information systems. The authors have found that the reliability and failure modes of many network technologies can be effectively assessed using fault trees and other PLM methods. The results of these models are compatible with an expanded set of vital area analysis techniques that can model both physical locations and virtual (logical) locations to identify both categories of vital areas simultaneously. These results can also be used with optimization techniques to direct the analyst toward the most cost-effective security solution.

Wyss, G.D.; Daniel, S.L.; Schriner, H.K.; Gaylor, T.R.

1996-07-01

446

Man-systems distributed system for Space Station Freedom  

NASA Technical Reports Server (NTRS)

Viewgraphs on man-systems distributed system for Space Station Freedom are presented. Topics addressed include: description of man-systems (definition, requirements, scope, subsystems, and topologies); implementation (approach, tools); man-systems interfaces (system to element and system to system); prime/supporting development relationship; selected accomplishments; and technical challenges.

Lewis, J. L.

1990-01-01

447

A contemporary view of systems engineering. [definition of system and discussion of systems approach  

NASA Technical Reports Server (NTRS)

The concept of a 'system' is defined, and the 'systems approach' is discussed. Four contemporary examples of the systems approach are presented: an operations research project, the planning-programming-budgeting system, an information processing system, and aerospace programs.

Miles, R. F., Jr.

1974-01-01

448

Benchmarking unstructured systems  

SciTech Connect

Systems developed without the advantage of structured techniques can currently be found, even though most managers agree that the lack of such techniques is apt to produce an inferior product. When an unstructured system is identified, management must decide if it should be rewritten according to modern standards. The case study presented here describes how management in one Data Processing shop made that decision and learned something about their perceptions of the staff as well. To be judged successful, a system should be friendly, useful and easily maintainable. Research has shown that psychologically complex programs are more expensive to maintain than those developed with structured techniques, free from such complexity. In this study, three suspect systems were statistically measured against a base system. When a suspect system proved at least as psychologically complex as the base system, future maintenance costs were assumed to be at least as high as for the benchmark system. In addition to judging whether or not a system should be rewritten to provide ease of maintenance, the study provided management with a more accurate view of programmer work habits. Programmers previously judged to be extremely competent had created a high level of psychological complexity which is expected to result in high maintenance costs when other programmers become responsible for the system.

Brice, L.; Connell, J.; Lockhart, G.

1983-01-01

449

Unified Synoptic System  

NASA Astrophysics Data System (ADS)

During the complete life cycle of spacecraft projects different systems for development, testing, operation and control are used. All of these systems have some commonalities but in most space projects for each phase a dedicated hardware and software is used. One software component common to all facilities is the data presentation software. The Unified Synoptic System (USS) described here, is developed to reduce the effort (and cost) for development and definition of synoptic displays as well as to reduce the overall cost of space craft equipments. The Unified Synoptic System is developed as an extension of the Columbus Ground System (CGS) but with the standardised interfaces it is also open for other systems. In this paper we will describe the concept of the Unified Synoptic System from operational point of view as well as from the technical point of view. We give a short overview about synoptic display systems in use for or satellite integration and operation and also for integration and operation of the Columbus module (on ground and on-board). To understand the requirements on a Synoptic System we will shortly describe the Columbus Ground System with the Mission Database (MDB).

Nicklaussen, D.

450

Distributed Deliberative Recommender Systems  

NASA Astrophysics Data System (ADS)

Case-Based Reasoning (CBR) is one of most successful applied AI technologies of recent years. Although many CBR systems reason locally on a previous experience base to solve new problems, in this paper we focus on distributed retrieval processes working on a network of collaborating CBR systems. In such systems, each node in a network of CBR agents collaborates, arguments and counterarguments its local results with other nodes to improve the performance of the system's global response. We describe D2ISCO: a framework to design and implement deliberative and collaborative CBR systems that is integrated as a part of jcolibritwo an established framework in the CBR community. We apply D2ISCO to one particular simplified type of CBR systems: recommender systems. We perform a first case study for a collaborative music recommender system and present the results of an experiment of the accuracy of the system results using a fuzzy version of the argumentation system AMAL and a network topology based on a social network. Besides individual recommendation we also discuss how D2ISCO can be used to improve recommendations to groups and we present a second case of study based on the movie recommendation domain with heterogeneous groups according to the group personality composition and a group topology based on a social network.

Recio-García, Juan A.; Díaz-Agudo, Belén; González-Sanz, Sergio; Sanchez, Lara Quijano

451

Paravirtualization for HPC Systems  

SciTech Connect

Virtualization has become increasingly popular for enabling full system isolation, load balancing, and hardware multiplexing. This wide-spread use is the result of novel techniques such as paravirtualization that make virtualization systems practical and efficient. Paravirtualizing systems export an interface that is slightly different from the underlying hardware but that significantly streamlines and simplifies the virtualization process. In this work, we investigate the efficacy of using paravirtualizing software for performance-critical HPC kernels and applications. Such systems are not currently employed in HPC environments due to their perceived overhead. However, virtualization systems offer tremendous potential for benefiting HPC systems by facilitating application isolation, portability, operating system customization, and program migration. We present a comprehensive performance evaluation of Xen, a low-overhead, Linux-based, virtual machine monitor (VMM), for paravirtualization of HPC cluster systems at Lawrence Livermore National Lab (LLNL). We consider four categories of micro-benchmarks from the HPC Challenge (HPCC) and LLNL ASCI Purple suites to evaluate a wide range of subsystem-specific behaviors. In addition, we employ macro-benchmarks and HPC application to evaluate overall performance in a real setting. We also employ statistically sound methods to compare the performance of a paravirtualized kernel against three popular Linux operating systems: RedHat Enterprise 4 (RHEL4) for build versions 2.6.9 and 2.6.12 and the LLNL CHAOS kernel, a specialized version of RHEL4. Our results indicate that Xen is very efficient and practical for HPC systems.

Youseff, L; Wolski, R; Gorda, B; Krintz, C

2006-10-12

452

Nemesis Autonomous Test System  

NASA Technical Reports Server (NTRS)

A generalized framework has been developed for systems validation that can be applied to both traditional and autonomous systems. The framework consists of an automated test case generation and execution system called Nemesis that rapidly and thoroughly identifies flaws or vulnerabilities within a system. By applying genetic optimization and goal-seeking algorithms on the test equipment side, a "war game" is conducted between a system and its complementary nemesis. The end result of the war games is a collection of scenarios that reveals any undesirable behaviors of the system under test. The software provides a reusable framework to evolve test scenarios using genetic algorithms using an operation model of the system under test. It can automatically generate and execute test cases that reveal flaws in behaviorally complex systems. Genetic algorithms focus the exploration of tests on the set of test cases that most effectively reveals the flaws and vulnerabilities of the system under test. It leverages advances in state- and model-based engineering, which are essential in defining the behavior of autonomous systems. It also uses goal networks to describe test scenarios.

Barltrop, Kevin J.; Lee, Cin-Young; Horvath, Gregory A,; Clement, Bradley J.

2012-01-01

453

Understanding medical systems.  

PubMed

The prominence of physicians in highly interdependent medical systems confers tremendous power on them, individually and as a profession. With this power comes an ethical responsibility to be deeply concerned about medical systems. Examples of medical systems include the process of treating patients with diabetes; a hospital; the development and testing of new medical procedures; and a medical practice, including locations of care, billing, and collection of fees for medical care. The physician who is willing to learn about the nature of systems, how to control them, and how to improve them can significantly influence medical systems. Many persons in health care organizations identify strongly with their individual profession or department. Management structures, professional organizations, and methods of billing for services reinforce these divisions. This fragmented environment allows the structure of medical systems to evolve piecemeal from the various actions and points of view of physicians, nurses, administrators, patients, and payers. Improvement results from new structures that are purposefully designed. To achieve improvement, people must look beyond their own professional or organizational identities and see themselves as part of the larger system. Even a rudimentary understanding of the structures and dynamics of systems combined with clinical knowledge can equip a physician to collaborate with colleagues to diagnose faults of a system and design remedies. This paper explores the nature of medical systems and develops ideas their proper application to medicine and the activities of physicians. PMID:9471933

Nolan, T W

1998-02-15

454

The thioredoxin antioxidant system.  

PubMed

The thioredoxin (Trx) system, which is composed of NADPH, thioredoxin reductase (TrxR), and thioredoxin, is a key antioxidant system in defense against oxidative stress through its disulfide reductase activity regulating protein dithiol/disulfide balance. The Trx system provides the electrons to thiol-dependent peroxidases (peroxiredoxins) to remove reactive oxygen and nitrogen species with a fast reaction rate. Trx antioxidant functions are also shown by involvement in DNA and protein repair by reducing ribonucleotide reductase, methionine sulfoxide reductases, and regulating the activity of many redox-sensitive transcription factors. Moreover, Trx systems play critical roles in the immune response, virus infection, and cell death via interaction with thioredoxin-interacting protein. In mammalian cells, the cytosolic and mitochondrial Trx systems, in which TrxRs are high molecular weight selenoenzymes, together with the glutathione-glutaredoxin (Grx) system (NADPH, glutathione reductase, GSH, and Grx) control the cellular redox environment. Recently mammalian thioredoxin and glutathione systems have been found to be able to provide the electrons crossly and to serve as a backup system for each other. In contrast, bacteria TrxRs are low molecular weight enzymes with a structure and reaction mechanism distinct from mammalian TrxR. Many bacterial species possess specific thiol-dependent antioxidant systems, and the significance of the Trx system in the defense against oxidative stress is different. Particularly, the absence of a GSH-Grx system in some pathogenic bacteria such as Helicobacter pylori, Mycobacterium tuberculosis, and Staphylococcus aureus makes the bacterial Trx system essential for survival under oxidative stress. This provides an opportunity to kill these bacteria by targeting the TrxR-Trx system. PMID:23899494

Lu, Jun; Holmgren, Arne

2014-01-01

455

Geoscience laser altimeter system - stellar reference system  

SciTech Connect

GLAS is an EOS space-based laser altimeter being developed to profile the height of the Earth's ice sheets with {approx}15 cm single shot accuracy from space under NASA's Mission to Planet Earth (MTPE). The primary science goal of GLAS is to determine if the ice sheets are increasing or diminishing for climate change modeling. This is achieved by measuring the ice sheet heights over Greenland and Antarctica to 1.5 cm/yr over 100 kmx100 km areas by crossover analysis (Zwally 1994). This measurement performance requires the instrument to determine the pointing of the laser beam to {approx}5 urad (1 arcsecond), 1-sigma, with respect to the inertial reference frame. The GLAS design incorporates a stellar reference system (SRS) to relate the laser beam pointing angle to the star field with this accuracy. This is the first time a spaceborne laser altimeter is measuring pointing to such high accuracy. The design for the stellar reference system combines an attitude determination system (ADS) with a laser reference system (LRS) to meet this requirement. The SRS approach and expected performance are described in this paper.

Millar, Pamela S.; Sirota, J. Marcos [NASA Goddard Space Flight Center, Laser Remote Sensing Branch, Code 924, Greenbelt, Maryland, 20771 (United States); University of Maryland at Baltimore County, 5401 Wilkens Ave, Baltimore, Maryland, 21228-5398 (United States)

1998-01-15

456

Planetary Data System Distributed Inventory System.  

National Technical Information Service (NTIS)

The advent of the World Wide Web (Web) and the ability to easily put data repositories on-line has resulted in a proliferation of digital libraries. The heterogeneity of the underlying systems, the autonomy of the individual sites, and distributed nature ...

J. S. Hughes S. K. McMahon

1996-01-01

457

The LSST: A System of Systems  

Microsoft Academic Search

The Large Synoptic Survey Telescope (LSST) is a complete observing system that acquires and archives images, processes and analyzes them, and publishes reduced images and catalogs of sources and objects. The LSST will operate over a ten year period producing a survey of 20,000 square degrees over the entire [Southern] sky in 6 filters (ugrizy) with each field having been

Chuck F. Claver; G. P. Debois-Felsmann; F. Delgado; P. Hascall; S. Marshall; M. Nordby; G. Schumacher; J. Sebag

2011-01-01

458

The global Earth observation system of systems  

NASA Astrophysics Data System (ADS)

Recognizing the growing need for improved Earth observations, 140 governments and leading international organizations have established the Group on Earth Observations, or GEO, to collaborate and implement a Global Earth Observation System of Systems (GEOSS) by the year 2015. Countries and organizations are contributing their respective Earth monitoring systems, from satellites in space and in situ instruments on land, in the oceans and in the atmosphere. They are interlinking these systems so that, together, they provide a more complete picture of Earth's systems dynamics. GEO is developing common technical standards to pool observations and ensure their cross calibration and validation. It is building a web-based infrastructure to ensure easy access to the wealth of data and services contributed to, or generated by, GEOSS. GEO has been promoting the free and open sharing and dissemination of Earth observation data which has already driven significant changes in data distribution policies of several key Earth observing satellites: Landsat, Cbers and the future Sentinels of GMES. GEO is also reflecting on solutions to transition research systems into operational observing systems and ensure their long-term sustainability. First, the current status of GEOSS implementation and these core activities of GEO will be presented. Then, examples of global data sets and information systems or services developed through GEOSS will be presented: - a high-resolution global digital elevation model (DEM) based on Aster data was released by Japan and the USA. In situ measurements are now being used to improve the model as well as the stacking procedure used to develop it; - the Supersites initiative ensures coordinated access to data and information on natural hazards in geologically active regions. In light of the recent tragedy in Haiti, this project created a dedicated web site regularly updated with maps of seismicity, tectonics, Coulomb stress changes, topography, real and synthetic interferograms, as well as damage maps, data, and space images. See http://supersites.unavco.org/haiti.php; - the global carbon observation and analysis system combines observations, reanalysis and product development to provide regional information on emission variations. It addresses the three components of the carbon cycle (atmosphere, land, ocean). The project includes the improvement of global networks of atmospheric CO2 observations, air-surface exchange flux networks, surface ocean CO2 and related marine biochemistry observations, as well as space-based measurements combining Sciamachy , Airs and the newly launched Japanese Gosat; - the Forest Carbon Tracking (FCT) project coordinates the acquisition of observations from multi-spectral and radar (X, C and L-band) satellites, their processing through different models and methodologies and their validation by in situ measurements in 7 selected countries. The aim is to demonstrate the feasibility of a global monitoring and verification system for carbon storage and change in forests. Data and results can be viewed on-line at www.geo-fct.org. This portal allows users to visualize the FCT National Demonstrators, the relevant validation sites and the inventory of the coordinated acquisitions of satellite and in-situ data. Maps and information resulting from the processing of the data will also be posted here when available.

Achache, José

2010-05-01

459

NEEDS - Information Adaptive System  

NASA Technical Reports Server (NTRS)

The Information Adaptive System (IAS) is an element of the NASA End-to-End Data System (NEEDS) Phase II and is focused toward onboard image processing. The IAS is a data preprocessing system which is closely coupled to the sensor system. Some of the functions planned for the IAS include sensor response nonuniformity correction, geometric correction, data set selection, data formatting, packetization, and adaptive system control. The inclusion of these sensor data preprocessing functions onboard the spacecraft will significantly improve the extraction of information from the sensor data in a timely and cost effective manner, and provide the opportunity to design sensor systems which can be reconfigured in near real-time for optimum performance. The purpose of this paper is to present the preliminary design of the IAS and the plans for its development.

Kelly, W. L.; Benz, H. F.; Meredith, B. D.

1980-01-01

460

Bi-Cu System  

NSDL National Science Digital Library

The information provided for the Bi-Cu System consists of five parts: - Diagram: The diagram shows the calculated phase diagram of the system. - Status: The source and status of the analytical description of the Gibbs energies of the phases. - Additional Assessments: Bibliographic information for alternate thermodynamic descriptions. - Invariant Equilibria: Table with the calculated invariant equilibria of the system. The table lists the phases involved in the reaction, phase compositions and reaction temperature. - Phases: Table with the phases of the system. The table lists the crystal structure, common names of the phases and the model used for the thermodynamic description. Thermodynamic databases allow the compact storage of phase equilibria information in the form of Gibbs energy functions for each phase. The thermodynamic description of each phase in the binary system is derived from the assessment of the available phase equilibria and thermochemical data. The calculated phase diagram of the Bi-Cu system is presented.

Kattner, Ursula

2003-01-01

461

Ag-Cu System  

NSDL National Science Digital Library

The information provided for the Ag-Cu System consists of five parts: - Diagram: The diagram shows the calculated phase diagram of the system. - Status: The source and status of the analytical description of the Gibbs energies of the phases. - Additional Assessments: Bibliographic information for alternate thermodynamic descriptions. - Invariant Equilibria: Table with the calculated invariant equilibria of the system. The table lists the phases involved in the reaction, phase compositions and reaction temperature. - Phases: Table with the phases of the system. The table lists the crystal structure, common names of the phases and the model used for the thermodynamic description. Thermodynamic databases allow the compact storage of phase equilibria information in the form of Gibbs energy functions for each phase. The thermodynamic description of each phase in the binary system is derived from the assessment of the available phase equilibria and thermochemical data. The calculated phase diagram of the Ag-Cu system is presented.

Kattner, Ursula

2003-01-01

462

Bi-Sn System  

NSDL National Science Digital Library

Thermodynamic databases allow the compact storage of phase equilibria information in the form of Gibbs energy functions for each phase. The thermodynamic description of each phase in the binary system is derived from the assessment of the available phase equilibria and thermochemical data. The calculated phase diagram of the Bi-Sn system is presented. The information provided for the Bi-Sn System consists of five parts: - Diagram: The diagram shows the calculated phase diagram of the system. - Status: The source and status of the analytical description of the Gibbs energies of the phases. - Additional Assessments: Bibliographic information for alternate thermodynamic descriptions. - Invariant Equilibria: Table with the calculated invariant equilibria of the system. The table lists the phases involved in the reaction, phase compositions and reaction temperature. - Phases: Table with the phases of the system. The table lists the crystal structure, common names of the phases and the model used for the thermodynamic description.

Kattner, Ursula

2003-01-01

463

Nervous system: part 1.  

PubMed

This article, which forms part of the life sciences series and is the first of three articles on the nervous system, explores the major divisions of the nervous system and their functions. The basic structure of a nerve cell is described, and generation and conduction of nerve impulses is discussed. Blood supply to the brain is also covered. The second article will examine the central nervous system (CNS) in greater detail, including protection of the CNS, and the structure and function of the cerebral cortex and cerebellum. The third article will examine the peripheral nervous system and the autonomic nervous system, and provides an overview of some of the disorders of the nervous system. PMID:24689422

Farley, Alistair; Johnstone, Carolyn; Hendry, Charles; McLafferty, Ella

464

Computer systems analyst  

NSDL National Science Digital Library

What do computer systems analysts actually do? This is the introductory page for a set of materials about a career as a computer systems analyst. Here the job of a computer systems analyst is defined and described. In the rest of the resource, students can examine three specialized job titles associated with computer system specialists: computer system administrator, senior network analyst, and programmer analyst. Students can view video clips of the computer system administrator, senior network analyst, and programmer analyst at work. A student challenge activity compares the records of 10 salespeople over a two-year period to determine who the best and worst salespeople are. Challenge activity answers and teacher suggestions are provided. Copyright 2005 Eisenhower National Clearinghouse

Project, Iowa P.

2002-01-01

465

Kepler's Multiple Planet Systems  

NASA Technical Reports Server (NTRS)

Among the 1800 Kepler targets that have candidate planets, 20% have two or more candidate planets. While most of these objects have not yet been confirmed as true planets, several considerations strongly suggest that the vast majority of these multi-candidate systems are true planetary systems. Virtually all candidate systems are stable, as tested by numerical integrations (assuming a nominal mass-radius relationship). Statistical studies performed on these candidates reveal a great deal about the architecture of planetary systems, including the typical spacing of orbits and flatness of planetary systems. The distribution of observed period ratios shows that the vast majority of candidate pairs are neither in nor near low-order mean motion resonances. Nonetheless, there are small but statistically significant excesses of candidate pairs both in resonance and spaced slightly too far apart to be in resonance, particularly near the 2:1 resonance. The characteristics of the confirmed Kepler multi-planet systems will also be discussed.

Lissauer, Jack J.

2012-01-01

466

Idaho Explosives Detection System  

NASA Astrophysics Data System (ADS)

The Idaho Explosives Detection System was developed at the Idaho National Laboratory (INL) to respond to threats imposed by delivery trucks potentially carrying explosives into military bases. A full-scale prototype system has been built and is currently undergoing testing. The system consists of two racks, one on each side of a subject vehicle. Each rack includes a neutron generator and an array of NaI detectors. The two neutron generators are pulsed and synchronized. A laptop computer controls the entire system. The control software is easily operable by minimally trained staff. The system was developed to detect explosives in a medium size truck within a 5-min measurement time. System performance was successfully demonstrated with explosives at the INL in June 2004 and at Andrews Air Force Base in July 2004.

Reber, Edward L.; Blackwood, Larry G.; Edwards, Andrew J.; Jewell, J. Keith; Rohde, Kenneth W.; Seabury, Edward H.; Klinger, Jeffery B.

2005-12-01

467

Vital signs monitoring system  

NASA Technical Reports Server (NTRS)

A system is disclosed for monitoring vital physiological signs. Each of the system components utilizes a single hybrid circuit with each component having high accuracy without the necessity of repeated calibration. The system also has low power requirements, provides a digital display, and is of sufficiently small size to be incorporated into a hand-carried case for portable use. Components of the system may also provide independent outputs making the component useful, of itself, for monitoring one or more vital signs. The overall system preferably includes an ECG amplifier and cardiotachometer signal conditioner unit, an impedance pneumograph and respiration rate signal conditioner unit, a heart/breath rate processor unit, a temperature monitoring unit, a selector switch, a clock unit, and an LCD driver unit and associated LCDs, with the system being capable of being expanded as needed or desired, such as, for example, by addition of a systolic/diastolic blood pressure unit.

Steffen, Dale A. (Inventor); Sturm, Ronald E. (Inventor); Rinard, George A. (Inventor)

1981-01-01

468

Inductive System Health Monitoring  

NASA Technical Reports Server (NTRS)

The Inductive Monitoring System (IMS) software was developed to provide a technique to automatically produce health monitoring knowledge bases for systems that are either difficult to model (simulate) with a computer or which require computer models that are too complex to use for real time monitoring. IMS uses nominal data sets collected either directly from the system or from simulations to build a knowledge base that can be used to detect anomalous behavior in the system. Machine learning and data mining techniques are used to characterize typical system behavior by extracting general classes of nominal data from archived data sets. IMS is able to monitor the system by comparing real time operational data with these classes. We present a description of learning and monitoring method used by IMS and summarize some recent IMS results.

Iverson, David L.

2004-01-01

469

Integrated oxygen recovery system  

NASA Technical Reports Server (NTRS)

Life Systems has conceptualized an innovative Integrated Oxygen Recovery System (IORS) applicable to advanced mission air revitalization. The IORS provides the capability to electrochemically generate metabolic oxygen (O2) and recover O2 from the space habitat atmosphere via a carbon dioxide (CO2) reduction process within a single assembly. To achieve this capability, the IORS utilizes a Solid Metal Cathode (SMC) water electrolysis unit that simultaneously serves as the Sabatier CO2 reduction reactor. The IORS enables two major life support systems currently baselined in closed loop air revitalization systems to be combined into one smaller, less complex system. This concept reduces fluidic and electrical interface requirements and eliminates a hydrogen (H2) interface. Life Systems is performing an evaluation of the IORS process directed at demonstrating performance and quantifying key physical characteristics including power, weight, and volume. Technical progress achieved during the first two months of the program is summarized.

Lee, M. Gene; Davenport, Ronald J.

1993-01-01

470

Integrated oxygen recovery system  

NASA Technical Reports Server (NTRS)

Life Systems has conceptualized an innovative Integrated Oxygen Recovery System (IORS) applicable to advanced mission air revitalization. The IORS provides the capability to electrochemically generate metabolic oxygen (O2) and recover O2 from the space habitat atmosphere via a carbon dioxide (CO2) reduction process within a single assembly. To achieve this capability, the IORS utilizes a Solid Metal Cathode (SMC) water electrolysis unit that simultaneously serves as the Sabatier CO2 reduction reactor. The IORS enables two major life support systems currently baselined in closed loop air revitalization systems to be combined into one smaller, less complex system. This concept reduces fluidic and electrical interface requirements and eliminates a hydrogen (H2) interface. Life Systems is performing an evaluation of the IORS process directed at demonstrating performance and quantifying key physical characteristics including power, weight, and volume. The results of the checkout, shakedown, and initial parametric tests are summarized.

Lee, M. Gene; Davenport, Ronald J.

1993-01-01

471

Ag-Pb System  

NSDL National Science Digital Library

The information provided for the Ag-Pb System consists of five parts: - Diagram: The diagram shows the calculated phase diagram of the system. - Status: The source and status of the analytical description of the Gibbs energies of the phases. - Additional Assessments: Bibliographic information for alternate thermodynamic descriptions. - Invariant Equilibria: Table with the calculated invariant equilibria of the system. The table lists the phases involved in the reaction, phase compositions and reaction temperature. - Phases: Table with the phases of the system. The table lists the crystal structure, common names of the phases and the model used for the thermodynamic description. Thermodynamic databases allow the compact storage of phase equilibria information in the form of Gibbs energy functions for each phase. The thermodynamic description of each phase in the binary system is derived from the assessment of the available phase equilibria and thermochemical data. The calculated phase diagram of the Ag-Pb system is presented.

Kattner, Ursula

2003-01-01

472

Pb-Sn System  

NSDL National Science Digital Library

The information provided for the Pb-Sn System consists of five parts: - Diagram: The diagram shows the calculated phase diagram of the system. - Status: The source and status of the analytical description of the Gibbs energies of the phases. - Additional Assessments: Bibliographic information for alternate thermodynamic descriptions. - Invariant Equilibria: Table with the calculated invariant equilibria of the system. The table lists the phases involved in the reaction, phase compositions and reaction temperature. - Phases: Table with the phases of the system. The table lists the crystal structure, common names of the phases and the model used for the thermodynamic description. Thermodynamic databases allow the compact storage of phase equilibria information in the form of Gibbs energy functions for each phase. The thermodynamic description of each phase in the binary system is derived from the assessment of the available phase equilibria and thermochemical data. The calculated phase diagram of the Pb-Sn system is presented.

Kattner, Ursula

2003-01-01

473

Ag-Bi System  

NSDL National Science Digital Library

The information provided for the Ag-Bi System consists of five parts: - Diagram: The diagram shows the calculated phase diagram of the system. - Status: The source and status of the analytical description of the Gibbs energies of the phases. - Additional Assessments: Bibliographic information for alternate thermodynamic descriptions. - Invariant Equilibria: Table with the calculated invariant equilibria of the system. The table lists the phases involved in the reaction, phase compositions and reaction temperature. - Phases: Table with the phases of the system. The table lists the crystal structure, common names of the phases and the model used for the thermodynamic description. Thermodynamic databases allow the compact storage of phase equilibria information in the form of Gibbs energy functions for each phase. The thermodynamic description of each phase in the binary system is derived from the assessment of the available phase equilibria and thermochemical data. The calculated phase diagram of the Ag-Bi system is presented.

Kattner, Ursula

2003-01-01

474

Bi-Pb System  

NSDL National Science Digital Library

The information provided for the Bi-Pb System consists of five parts: - Diagram: The diagram shows the calculated phase diagram of the system. - Status: The source and status of the analytical description of the Gibbs energies of the phases. - Additional Assessments: Bibliographic information for alternate thermodynamic descriptions. - Invariant Equilibria: Table with the calculated invariant equilibria of the system. The table lists the phases involved in the reaction, phase compositions and reaction temperature. - Phases: Table with the phases of the system. The table lists the crystal structure, common names of the phases and the model used for the thermodynamic description. Thermodynamic databases allow the compact storage of phase equilibria information in the form of Gibbs energy functions for each phase. The thermodynamic description of each phase in the binary system is derived from the assessment of the available phase equilibria and thermochemical data. The calculated phase diagram of the Bi-Pb system is presented.

Kattner, Ursula

2003-01-01

475

Cu-Pb System  

NSDL National Science Digital Library

The information provided for the Cu-Pb System consists of five parts: - Diagram: The diagram shows the calculated phase diagram of the system. - Status: The source and status of the analytical description of the Gibbs energies of the phases. - Additional Assessments: Bibliographic information for alternate thermodynamic descriptions. - Invariant Equilibria: Table with the calculated invariant equilibria of the system. The table lists the phases involved in the reaction, phase compositions and reaction temperature. - Phases: Table with the phases of the system. The table lists the crystal structure, common names of the phases and the model used for the thermodynamic description. Thermodynamic databases allow the compact storage of phase equilibria information in the form of Gibbs energy functions for each phase. The thermodynamic description of each phase in the binary system is derived from the assessment of the available phase equilibria and thermochemical data. The calculated phase diagram of the Cu-Pb system is presented.

Kattner, Ursula

2003-01-01

476

Ag-Sn System  

NSDL National Science Digital Library

The information provided for the Ag-Sn System consists of five parts: - Diagram: The diagram shows the calculated phase diagram of the system. - Status: The source and status of the analytical description of the Gibbs energies of the phases. - Additional Assessments: Bibliographic information for alternate thermodynamic descriptions. - Invariant Equilibria: Table with the calculated invariant equilibria of the system. The table lists the phases involved in the reaction, phase compositions and reaction temperature. - Phases: Table with the phases of the system. The table lists the crystal structure, common names of the phases and the model used for the thermodynamic description. Thermodynamic databases allow the compact storage of phase equilibria information in the form of Gibbs energy functions for each phase. The thermodynamic description of each phase in the binary system is derived from the assessment of the available phase equilibria and thermochemical data. The calculated phase diagram of the Ag-Sn system is presented.

Kattner, Ursula

2003-01-01

477

Cu-Sn System  

NSDL National Science Digital Library

The information provided for the Cu-Sn System consists of five parts: - Diagram: The diagram shows the calculated phase diagram of the system. - Status: The source and status of the analytical description of the Gibbs energies of the phases. - Additional Assessments: Bibliographic information for alternate thermodynamic descriptions. - Invariant Equilibria: Table with the calculated invariant equilibria of the system. The table lists the phases involved in the reaction, phase compositions and reaction temperature. - Phases: Table with the phases of the system. The table lists the crystal structure, common names of the phases and the model used for the thermodynamic description. Thermodynamic databases allow the compact storage of phase equilibria information in the form of Gibbs energy functions for each phase. The thermodynamic description of each phase in the binary system is derived from the assessment of the available phase equilibria and thermochemical data. The calculated phase diagram of the Cu-Sn system is presented.

Kattner, Ursula

2003-01-01

478

Oxidative Tritium Decontamination System  

SciTech Connect

The Princeton Plasma Physics Laboratory, Tritium Systems Group has developed and fabricated an Oxidative Tritium Decontamination System (OTDS), which is designed to reduce tritium surface contamination on various components and items. The system is configured to introduce gaseous ozone into a reaction chamber containing tritiated items that require a reduction in tritium surface contamination. Tritium surface contamination (on components and items in the reaction chamber) is removed by chemically reacting elemental tritium to tritium oxide via oxidation, while purging the reaction chamber effluent to a gas holding tank or negative pressure HVAC system. Implementing specific concentrations of ozone along with catalytic parameters, the system is able to significantly reduce surface tritium contamination on an assortment of expendable and non-expendable items. This paper will present the results of various experimentation involving employment of this system.

Charles A. Gentile; John J. Parker; Gregory L. Guttadora; Lloyd P. Ciebiera

2002-02-11

479

Remarks on integrable systems  

NASA Astrophysics Data System (ADS)

The problem of integrability conditions for systems of differential equations is discussed. Darboux's classical results on the integrability of linear non-autonomous systems with an incomplete set of particular solutions are generalized. Special attention is paid to linear Hamiltonian systems. The paper discusses the general problem of integrability of the systems of autonomous differential equations in an n-dimensional space, which admit the algebra of symmetry fields of dimension ? n. Using a method due to Liouville, this problem is reduced to investigating the integrability conditions for Hamiltonian systems with Hamiltonians linear in the momenta in phase space of dimension that is twice as large. In conclusion, the integrability of an autonomous system in three-dimensional space with two independent non-trivial symmetry fields is proved. It should be emphasized that no additional conditions are imposed on these fields.

Kozlov, Valery V.

2014-03-01

480

Centrifugal pump fuel system  

SciTech Connect

A centrifugal pump fuel system for an engine driven fuel pump for an aircraft gas turbine engine is described comprising: a centrifugal pump having at constant speed rising head/flow characteristic at low flows; a plumbing system receiving flow from the pump, and having at least one control valve located down stream of and defining a discrete volume of the plumbing system; a plumbing resonant frequency defined by the discrete volume, the geometry of the plumbing system, and the bulk modulus of the fuel; a pressure difference regulating valve located adjacent to the discharge of the pump, up stream of the vast majority of the discrete volume; and the frequency response of the regulating valve being significantly less than the frequency response of the plumbing system such that the response of the regulating valve is attenuated at the resonant frequency of the plumbing system.

McGlone, M.E.; Larkins, L.J.; Johnson, R.O.; Moeller, K.A.

1993-06-22

481

Environmental Conservation Online System  

NSDL National Science Digital Library

The Environmental Conservation Online System (ECOS) is a gateway web site that provides access to data systems in the Endangered Species and Fisheries and Habitat Conservation program areas, as well as other FWS and Government data sources. ECOS provides a central point of access to assist FWS personnel in managing data and information as well as provide general public access to information from numerous FWS databases. ECOS allows users to view, query, and, in some cases, edit data. Some of the larger applications are: Threatened and Endangered Species System (TESS), Habitat Tracking Information System (HabITS), Fish Passage Decision Support System (FPDSS), Contaminant Assessment Program (CAP), and Environmental Contaminants Data Management System (ECDMS). Mapping capabilities are also available, utilizing spatially referenced data in these databases. The general mapping utility, Geotract, is an interactive tool that includes data relevant to many service personnel and the public. Other specialized mapping tools are available for specific project and end-user needs.

482

Shuttle avionics system  

NASA Technical Reports Server (NTRS)

The avionics system of the Space Shuttle is designed in a fail operational/fail safe architecture. The guidance, navigation and control system is implemented, through the onboard Orbiter digital computers. Guidance, navigation and control sensors are triplex, while the flight control effectors are mechanized either in load sharing or quad structure. Two sets of basic flight instruments and controls are provided along with electronic interfaces to allow for multiple selection of input destination and display source selection. Communications, tracking and instrumentation subsystems are mechanized as a dual hardware design for key operational elements. The data processing system allows for quad, triplex, dual or single computer operation. The power distribution subsystem provides a triple bus system with appropriate tie elements. A functional description is given of the computer system, the data bus, the mass memory unit, the multiplexer/demultiplexer and the CRT display system.

Gardiner, R. A.; Bradford, W. C.

1975-01-01

483

The MEA vacuum system  

NASA Astrophysics Data System (ADS)

The leak security system and multiple pump unit with turbomolecular pump of the MEA vacuum system, consisting of a klystron system with diode pump and a bunch-conducting system with triode pump, is described. The triode pump has better pump capacities for rare gases but as it only works from 0.0001 Torr the pump unit has to be used. To replace the klystrons the two systems are coupled by two windows with nitrogen in between for high frequencies. To safeguard the system, slow isolation valves with Pirami gages, fast valves with ionization gages, and residual gas analyzers are installed. Hand valves and residual gas analyzer heads are used for the pump unit. The vacuum level is better than 0.0000001 Torr.

Stroo, R.; Schwebeke, H.; Heine, E.

1984-12-01

484

Systems Integration Challenges for a National Space Launch System  

NASA Technical Reports Server (NTRS)

System Integration was refined through the complexity and early failures experienced in rocket flight. System Integration encompasses many different viewpoints of the system development. System Integration must ensure consistency in development and operations activities. Human Space Flight tends toward large, complex systems. Understanding the system fs operational and use context is the guiding principle for System Integration: (1) Sizeable costs can be driven into systems by not fully understanding context (2). Adhering to the system context throughout the system fs life cycle is essential to maintaining efficient System Integration. System Integration exists within the System Architecture. Beautiful systems are simple in use and operation -- Block upgrades facilitate manageable steps in functionality evolution. Effective System Integration requires a stable system concept. Communication is essential to system simplicity

May, Todd A.

2011-01-01

485

SSME Post Test Diagnostic System: Systems Section  

NASA Technical Reports Server (NTRS)

An assessment of engine and component health is routinely made after each test firing or flight firing of a Space Shuttle Main Engine (SSME). Currently, this health assessment is done by teams of engineers who manually review sensor data, performance data, and engine and component operating histories. Based on review of information from these various sources, an evaluation is made as to the health of each component of the SSME and the preparedness of the engine for another test or flight. The objective of this project - the SSME Post Test Diagnostic System (PTDS) - is to develop a computer program which automates the analysis of test data from the SSME in order to detect and diagnose anomalies. This report primarily covers work on the Systems Section of the PTDS, which automates the analyses performed by the systems/performance group at the Propulsion Branch of NASA Marshall Space Flight Center (MSFC). This group is responsible for assessing the overall health and performance of the engine, and detecting and diagnosing anomalies which involve multiple components (other groups are responsible for analyzing the behavior of specific components). The PTDS utilizes several advanced software technologies to perform its analyses. Raw test data is analyzed using signal processing routines which detect features in the data, such as spikes, shifts, peaks, and drifts. Component analyses are performed by expert systems, which use 'rules-of-thumb' obtained from interviews with the MSFC data analysts to detect and diagnose anomalies. The systems analysis is performed using case-based reasoning. Results of all analyses are stored in a relational database and displayed via an X-window-based graphical user interface which provides ranked lists of anomalies and observations by engine component, along with supporting data plots for each.

Bickmore, Timothy

1995-01-01

486

Autonomic nervous system and immune system interactions.  

PubMed

The present review assesses the current state of literature defining integrative autonomic-immune physiological processing, focusing on studies that have employed electrophysiological, pharmacological, molecular biological, and central nervous system experimental approaches. Central autonomic neural networks are informed of peripheral immune status via numerous communicating pathways, including neural and non-neural. Cytokines and other immune factors affect the level of activity and responsivity of discharges in sympathetic and parasympathetic nerves innervating diverse targets. Multiple levels of the neuraxis contribute to cytokine-induced changes in efferent parasympathetic and sympathetic nerve outflows, leading to modulation of peripheral immune responses. The functionality of local sympathoimmune interactions depends on the microenvironment created by diverse signaling mechanisms involving integration between sympathetic nervous system neurotransmitters and neuromodulators; specific adrenergic receptors; and the presence or absence of immune cells, cytokines, and bacteria. Functional mechanisms contributing to the cholinergic anti-inflammatory pathway likely involve novel cholinergic-adrenergic interactions at peripheral sites, including autonomic ganglion and lymphoid targets. Immune cells express adrenergic and nicotinic receptors. Neurotransmitters released by sympathetic and parasympathetic nerve endings bind to their respective receptors located on the surface of immune cells and initiate immune-modulatory responses. Both sympathetic and parasympathetic arms of the autonomic nervous system are instrumental in orchestrating neuroimmune processes, although additional studies are required to understand dynamic and complex adrenergic-cholinergic interactions. Further understanding of regulatory mechanisms linking the sympathetic nervous, parasympathetic nervous, and immune systems is critical for understanding relationships between chronic disease development and immune-associated changes in autonomic nervous system function. © 2014 American Physiological Society. Compr Physiol 4:1177-1200, 2014. PMID:24944034

Kenney, M J; Ganta, C K

2014-07-01

487

Quality monitored distributed voting system  

DOEpatents

A quality monitoring system can detect certain system faults and fraud attempts in a distributed voting system. The system uses decoy voters to cast predetermined check ballots. Absent check ballots can indicate system faults. Altered check ballots can indicate attempts at counterfeiting votes. The system can also cast check ballots at predetermined times to provide another check on the distributed voting system.

Skogmo, David (Albuquerque, NM)

1997-01-01

488

Quality monitored distributed voting system  

DOEpatents

A quality monitoring system can detect certain system faults and fraud attempts in a distributed voting system. The system uses decoy voters to cast predetermined check ballots. Absent check ballots can indicate system faults. Altered check ballots can indicate attempts at counterfeiting votes. The system can also cast check ballots at predetermined times to provide another check on the distributed voting system. 6 figs.

Skogmo, D.

1997-03-18

489

Energy scalable system design  

Microsoft Academic Search

We introduce the notion of energy-scalable system- design. The principal idea is to maximize computational quality for a given energy constraint at all levels of the system hierarchy. The desirable energy-quality (E-Q) characteristics of systems are dis- cussed. E-Q behavior of algorithms is considered and transforms that significantly improve scalability are analyzed using three dis- tinct categories of commonly used

Amit Sinha; Alice Wang; Anantha Chandrakasan

2002-01-01

490

Logics for hybrid systems  

Microsoft Academic Search

Hybrid systems are heterogenous dynamical systems characterized by interacting continuous and discrete dynamics. Such mathematical models have proved fruitful in a great diversity of engineering applications, including air-traffic control, automated manufacturing, and chemical process control. The high-profile and safety-critical nature of the application areas has fostered a large and growing body of work on formal methods for hybrid systems: mathematical

J. M. Davoren; ANIL NERODE

2000-01-01

491

Energy Recovery System  

NASA Technical Reports Server (NTRS)

Cogeneration system is one in which the energy ordinarily wasted in an industrial process is recovered and reused to create a second form of energy. Such an energy recovery system is in use at Crane Company's plant in Ferguson, KY, which manufactures ceramic bathroom fixtures. Crane's system captures hot stack gases from the company's four ceramic kilns and uses them to produce electrical power for plant operations.

1983-01-01

492

Dynamic compensation system [ships  

Microsoft Academic Search

A dynamic compensation system (DC-system) has been developed. It is used as an extension of the KaMeWa polar joystick system, where the horizontal motions of a ship are controlled by main propellers, rudders and bow thrusters. It acts like a compensator for wind and current disturbances, allowing the joystick operator to run the ship in almost all weather conditions as

C. G. Kallstrom; Kalle Theoren

1994-01-01

493

Plasmatron-catalyst system  

DOEpatents

A plasmatron-catalyst system. The system generates hydrogen-rich gas and comprises a plasmatron and at least one catalyst for receiving an output from the plasmatron to produce hydrogen-rich gas. In a preferred embodiment, the plasmatron receives as an input air, fuel and water/steam for use in the reforming process. The system increases the hydrogen yield and decreases the amount of carbon monoxide.

Bromberg, Leslie (Sharon, MA); Cohn, Daniel R. (Chestnut Hill, MA); Rabinovich, Alexander (Swampscott, MA); Alexeev, Nikolai (Moscow, RU)

2007-10-09

494

World-Systems Theorizing  

Microsoft Academic Search

The intellectual history of world-systems theorizing has roots in classical sociology, Marxian revolutionary theory, geopolitical strategizing, and theories of social evolution. But in explicit form the world-systems perspective emerged only in the 1970s when Samir Amin, Andre Gunder Frank, and Immanuel Wallerstein began to formulate the concepts and to narrate the analytic history of the modem world system. Especially for

Christopher Chase-Dunn

495

Generic User Modeling Systems  

Microsoft Academic Search

The paper reviews the development of generic user modeling systems over the past twenty years. It describes their purposes, their services within user-adaptive systems, and the different design requirements for research prototypes and commerciallydeployed servers. It dis- cusses the architectures that have been explored so far, namely shell systems that form part oftheapplication,centralserversystemsthatcommunicatewithseveralapplications,andpossible future user modeling agents that physically follow

Alfred Kobsa

2001-01-01

496

Maritime Intelligent Transport Systems  

NASA Astrophysics Data System (ADS)

The concept of intelligent transport systems, developed since 1980s, includes all modes of transport. Relevant developments in road transport are the most advanced. Recently water transport, particularly maritime transport, has gained more attention in this respect, in connection with building and further developments of maritime intelligent transport systems. The present state and directions of development of telematic systems in maritime transport will be discussed, with a focus on marine navigation.

Pietrzykowski, Zbigniew

497

Precision displacement reference system  

DOEpatents

A precision displacement reference system is described, which enables real time accountability over the applied displacement feedback system to precision machine tools, positioning mechanisms, motion devices, and related operations. As independent measurements of tool location is taken by a displacement feedback system, a rotating reference disk compares feedback counts with performed motion. These measurements are compared to characterize and analyze real time mechanical and control performance during operation.

Bieg, Lothar F. (Albuquerque, NM); Dubois, Robert R. (Albuquerque, NM); Strother, Jerry D. (Edgewood, NM)

2000-02-22

498

Geographic Names Information System  

USGS Publications Warehouse

The Geographic Names Information System (GNIS) is an automated data system developed by the U.S. Geological Survey (USGS) to standardize and disseminate information on geographic names. GNIS provides primary information for all known places, features, and areas in the United States identified by a proper name. The information in the system can be manipulated to meet varied needs. You can incorporate information from GNIS into your own data base for special applications.

U.S. Geological Survey

1984-01-01

499

Mathematical circulatory system model  

NASA Technical Reports Server (NTRS)

A system and method of modeling a circulatory system including a regulatory mechanism parameter. In one embodiment, a regulatory mechanism parameter in a lumped parameter model is represented as a logistic function. In another embodiment, the circulatory system model includes a compliant vessel, the model having a parameter representing a change in pressure due to contraction of smooth muscles of a wall of the vessel.

Lakin, William D. (Inventor); Stevens, Scott A. (Inventor)

2010-01-01

500

Drone Control System  

NASA Technical Reports Server (NTRS)

Drones, subscale vehicles like the Firebees, and full scale retired military aircraft are used to test air defense missile systems. The DFCS (Drone Formation Control System) computer, developed by IBM (International Business Machines) Federal Systems Division, can track ten drones at once. A program called ORACLS is used to generate software to track and control Drones. It was originally developed by Langley and supplied by COSMIC (Computer Software Management and Information Center). The program saved the company both time and money.

1983-01-01