Science.gov

Sample records for maintenance problem resolution

  1. Decision Support The Aircraft Maintenance Base Location Problem

    E-print Network

    Kincaid, Rex K.

    Decision Support The Aircraft Maintenance Base Location Problem Ram Gopalan School of Business transportation Aircraft maintenance Facility location Approximation algorithms Computational complexity a b s t r guidelines for aircraft maintenance, with violations leading to significant penalties for airlines. Moreover

  2. The Public School Infrastructure Problem: Deteriorating Buildings and Deferred Maintenance

    ERIC Educational Resources Information Center

    Hunter, Richard C.

    2009-01-01

    The deterioration of public school buildings is more prevalent in large cities that, because of funding shortfalls, have deferred maintenance and require huge sums to bring their buildings up to acceptable standards. Cities such as New York will require approximately $680 million to address the problem of deferred maintenance for needed painting,…

  3. Solving complex maintenance planning optimization problems using stochastic simulation and multi-criteria fuzzy decision making

    SciTech Connect

    Tahvili, Sahar; Österberg, Jonas; Silvestrov, Sergei; Biteus, Jonas

    2014-12-10

    One of the most important factors in the operations of many cooperations today is to maximize profit and one important tool to that effect is the optimization of maintenance activities. Maintenance activities is at the largest level divided into two major areas, corrective maintenance (CM) and preventive maintenance (PM). When optimizing maintenance activities, by a maintenance plan or policy, we seek to find the best activities to perform at each point in time, be it PM or CM. We explore the use of stochastic simulation, genetic algorithms and other tools for solving complex maintenance planning optimization problems in terms of a suggested framework model based on discrete event simulation.

  4. Approximate resolution of hard numbering problems

    SciTech Connect

    Bailleux, O.; Chabrier, J.J.

    1996-12-31

    We present a new method for estimating the number of solutions of constraint satisfaction problems. We use a stochastic forward checking algorithm for drawing a sample of paths from a search tree. With this sample, we compute two values related to the number of solutions of a CSP instance. First, an unbiased estimate, second, a lower bound with an arbitrary low error probability. We will describe applications to the Boolean Satisfiability problem and the Queens problem. We shall give some experimental results for these problems.

  5. ENVIRONMENTAL ISOTOPES FOR RESOLUTION OF HYDROLOGY PROBLEMS

    EPA Science Inventory

    The use of environmental isotopes as tracers in the hydrosphere is increasing as analytical instrumentation improves and more applications are discovered. There exists still misconceptions on the role of isotopes in resolving hydrology problems. Naturally occurring isotopes in th...

  6. Interventions for Weight Reduction: Facing the Maintenance Problem

    ERIC Educational Resources Information Center

    Anderson, Drew A.; Simmons, Angela M.; Milnes, Suzanne M.

    2005-01-01

    Behavioral treatments are perhaps the cornerstone of modern obesity treatment. Maintenance of weight lost via behavioral treatments has been less than hoped for, however. Weight regain is the result of complex interactions between physiological, behavioral, cognitive, and environmental factors; in this paper we review some of these factors and…

  7. Stochastic resolution of the LHC inverse problem

    SciTech Connect

    Balazs, Csaba; Kahawala, Dilani

    2010-02-10

    We quantify the LHC inverse problem in the stochastic context by introducing a robust statistical discriminator mapping from the experimental signature space to the theory parameter space. Using this discriminator, after complementing LHC data by existing astrophysical, collider, and low energy measurements, we are able to significantly reduce the inverse problem. Our approach offers an essentially prior independent way to differentiate regions of the theory parameter space and uses LHC and other data on the same footing.

  8. High-resolution structure prediction and the crystallographic phase problem

    E-print Network

    Das, Rhiju

    The energy-based refinement of low-resolution protein structure models to atomic-level accuracy is a major structure to relax in a physically realistic all-atom force field. In applications to models produced usingARTICLES High-resolution structure prediction and the crystallographic phase problem Bin Qian1

  9. Internet-Based Recording Service Solves Maintenance Reporting Problems.

    ERIC Educational Resources Information Center

    Noah, Marilyn

    2001-01-01

    Details the response to a health threat caused by illegal wastewater disposal in Wisconsin. Traces the identification of the problem, ordinances and policies adopted to guide the remedy, and subsequent monitoring of environmental quality. (DDR)

  10. Maintenance and Transfer of Training by Mentally Retarded Young Adults on the Tower of Hanoi Problem.

    ERIC Educational Resources Information Center

    Minsky, Shula K.; And Others

    1985-01-01

    Training, maintenance, and transfer of performance of mildly and moderately retarded young adults on the Tower of Hanoi, a transformation problem-solving task, was measured in two studies. Performance on trained problems was improved and gains were maintained over periods of 9 and 13 weeks. Generalization to two transfer tasks was very limited.…

  11. Resolutions of Problems that Occurred in SPEAR3 Magnet Production

    SciTech Connect

    Li, Nanyang

    2005-05-27

    Some problems occurred during the SPEAR3 magnet production at IHEP, China. It was very hard to find resolution from existing knowledge of those problems. It was possible that similar problems might have happen in building accelerator magnet in other institutes before, but they were not addressed in public papers. These problems were discussed and solved by engineers from both SLAC and IHEP after conducting certain experiments. Traditionally, the magnet design and measurement data have been always well documented and addressed in papers, but the production experiences have not been recorded adequately. It is the goal of this paper to record the problems and their resolutions during SPEAR3 magnet production at IHEP China, which will certainly benefit future magnet projects.

  12. Optimization as a Tool for Consistency Maintenance in Multi-Resolution Simulation

    NASA Technical Reports Server (NTRS)

    Drewry, Darren T; Reynolds, Jr , Paul F; Emanuel, William R

    2006-01-01

    The need for new approaches to the consistent simulation of related phenomena at multiple levels of resolution is great. While many fields of application would benefit from a complete and approachable solution to this problem, such solutions have proven extremely difficult. We present a multi-resolution simulation methodology that uses numerical optimization as a tool for maintaining external consistency between models of the same phenomena operating at different levels of temporal and/or spatial resolution. Our approach follows from previous work in the disparate fields of inverse modeling and spacetime constraint-based animation. As a case study, our methodology is applied to two environmental models of forest canopy processes that make overlapping predictions under unique sets of operating assumptions, and which execute at different temporal resolutions. Experimental results are presented and future directions are addressed.

  13. The role of romantic attraction and conflict resolution in predicting shorter and longer relationship maintenance among adolescents.

    PubMed

    Appel, Israel; Shulman, Shmuel

    2015-04-01

    This study examined the role of romantic attraction and conflict resolution patterns in shorter and longer relationship maintenance among adolescent couples. Data were used from 55 couples aged 15-18 years. Partners completed the Romantic Attraction scale and were observed negotiating a disagreement. Three and 6 months later, they were asked to report whether they were still together. Findings indicated that partners' romantic attraction and the tendency to minimize disagreements during interaction predicted shorter relationship maintenance. In contrast, longer relationship maintenance was predicted by partners' capability to resolve conflicts constructively in a positive atmosphere. Findings are embedded and discussed within Fisher's (2004) evolutionary theory of love. PMID:25663237

  14. Pediatric Enteric Feeding Techniques: Insertion, Maintenance, and Management of Problems

    SciTech Connect

    Nijs, Els L. F.; Cahill, Anne Marie

    2010-12-15

    Enteral feeding is considered a widespread, well-accepted means of delivering nutrition to adults and children who are unable to consume food by mouth or who need support in maintaining adequate nutrition for a variety of reasons, including acute and chronic disease states. Delivery of enteral feeding to nutritionally deprived patients may be achieved by several means. In this article, the indications and insertion of enteral access in children will be reviewed. In addition, common complications and management of problems will be discussed.

  15. Theoretical Problems in High Resolution Solar Physics, 2

    NASA Technical Reports Server (NTRS)

    Athay, G. (editor); Spicer, D. S. (editor)

    1987-01-01

    The Science Working Group for the High Resolution Solar Observatory (HRSO) laid plans beginning in 1984 for a series of workshops designed to stimulate a broadbased input from the scientific community to the HRSO mission. These workshops have the dual objectives of encouraging an early start on the difficult theoretical problems in radiative transfer, magnetohydrodynamics, and plasma physics that will be posed by the HRSO data, and maintaining current discussions of results in high resolution solar studies. This workshop was the second in the series. The workshop format presented invited review papers during the formal sessions and contributed poster papers for discussions during open periods. Both are presented.

  16. CONTEMPORARY SITUATIONS AND PROBLEMS OF ROAD/BRIDGE MAINTENANCE TECHNICAL COOPERATION PROJECTS

    NASA Astrophysics Data System (ADS)

    Nishimiya, Noriaki; Sanui, Kazumasa; Mizota, Yuzo

    It is widely acknowledged that roads are the most important transport infrastructure in developing countries. Unlike railroads requiring organizations and systems to operate, individuals can drive on roads. Almost all donors have assisted developing countr ies for new road constructions and rehabilitations. Report of insufficient maintenance in the developing countries, however, has been notable. As a result of the maintenance problems, deterioration of roads is pr ogressing with speed more than expected. It causes the traffic safety problems and an obstacle of economic development. JICA and other donors recognize that this situation can not be overlooked and reci pient countries are increasing their expectation of obtaining assistance on road/bridge maintenance. JICA has implemented over 10 technical cooper ation projects for road/b ridge maintenance in developing countries. JICA conducted a study to review those projects comprehensively. That study aims at obtaining problems, lessons learned and discussion material for policy making and method improvement for future similar pr ojects. This report introduces the outline of the study including additional analysis and recommendations by the authors.

  17. Application of the genetic algorithm for global scheduling and a single machine scheduling problem with periodic maintenance and semiresumable jobs 

    E-print Network

    Graves, Gregory Howard

    1998-01-01

    This thesis considers two different scheduling problems in industrial settings. The first problem consists of minimizing the total completion time of jobs scheduled on a single machine that must undergo periodic maintenance. Additionally, if a job...

  18. Adapting problem-solving therapy for depressed older adults in methadone maintenance treatment.

    PubMed

    Rosen, Daniel; Morse, Jennifer Q; Reynolds, Charles F

    2011-03-01

    Late-life depression is prevalent in older adults who are dependent on opiates. Depressive disorders among opiate abusers have detrimental effects on their well-being and ability to refrain from illegal drugs. There are numerous barriers to the provision of appropriate mental health care to older adults receiving methadone maintenance treatment. This article focuses on problem-solving therapy (PST) and presents evidence that PST may be a promising nonpharmacological treatment for older methadone clients with comorbid depressive disorders that can be applied within the staffing and resource limits of methadone maintenance treatment facilities. The advantages of PST relative to other behavioral therapies for this population are based on evidence that PST is less cognitively demanding for an older adult population with mood and substance use disorders. A properly modified PST for an older adult substance-dependent population with subsyndromal or diagnosed depression may be a viable option for methadone maintenance programs with limited resources. PMID:21036509

  19. Classical Machian Resolution of the Spacetime Reconstruction Problem

    E-print Network

    Anderson, Edward

    2013-01-01

    Following from a question of Wheeler, why does the Hamiltonian constraint ${\\cal H}$ of GR have the particular form it does? A first answer, by Hojman, Kucha\\v{r} and Teitelboim is that using embeddability into spacetime as a principle gives the form of ${\\cal H}$. The present paper culminates a second Machian answer -- initially by Barbour, Foster and \\'{o} Murchadha -- in which space but not spacetime are assumed. Thus this answer is additionally a classical-level resolution of the spacetime reconstruction problem. In this approach, mere consistency imposed by the Dirac procedure whittles down a general ansatz to one of four alternatives: Lorentzian, Galilean, Carrollian relativity and constant mean curvature slicing. These arise together as the different ways to kill off a 4-factor obstruction term. It is novel for such an alternative to arise from principles of dynamics considerations (in contrast with the historical form of the dichotomy between universal local Galilean or Lorentzian relativity). It is f...

  20. Classical Machian Resolution of the Spacetime Reconstruction Problem

    E-print Network

    Edward Anderson; Flavio Mercati

    2014-02-03

    Following from a question of Wheeler, why does the Hamiltonian constraint ${\\cal H}$ of GR have the particular form it does? A first answer, by Hojman, Kucha\\v{r} and Teitelboim, is that using embeddability into spacetime as a principle gives the form of ${\\cal H}$. The present paper culminates a second Machian answer - initially by Barbour, Foster and \\'{o} Murchadha - in which space but not spacetime are assumed. Thus this answer is additionally a classical-level resolution of the spacetime reconstruction problem. In this approach, mere consistency imposed by the Dirac procedure whittles down a general ansatz to one of four alternatives: Lorentzian, Galilean, or Carrollian relativity, or constant mean curvature slicing. These arise together as the different ways to kill off a 4-factor obstruction term. It is novel for such an alternative to arise from principles of dynamics considerations (in contrast with the historical form of the dichotomy between universal local Galilean or Lorentzian relativity). It is furthermore intriguing that it gives constant mean curvature slicing - familiar from York's work on the initial value problem -- as a further option on a similar footing. That is related to a number of recent alternative theories/formulations of GR known collectively as `shape dynamics'. The original work did not treat this with Poisson brackets and a proper systematic Dirac-type analysis; we rectify this in this paper. It is also the first demonstration of how this approach solves the classical spacetime reconstruction problem via `hypersurface tensor dual nationality' and what can be interpreted as embedding equations arising.

  1. Maintenance problems associated with the operation of the F402 /Pegasus/ engine in the AV-8A /Harrier/ aircraft

    NASA Technical Reports Server (NTRS)

    Stanley, C. W.; Hood, W. E.

    1981-01-01

    The U.S. Marine Corp (USMC) has been operating the only V/STOL attack aircraft in the western world since 1971. Some of the maintenance problems experienced are related to the unique V/STOL design criteria of the Pegasus engine. However, the major part of the required maintenance effort is found to involve the more conventional engine problems. A description of the aircraft engine is provided and the problems resulting from V/STOL design demands are examined. Attention is given to the fuel system control, the engine air bleed, foreign object damage to the hp compressor, and the engine exhaust system.

  2. Intrinsic Problem Affecting Contact Hole Resolution in Hyper NA Era

    NASA Astrophysics Data System (ADS)

    Matsuura, Seiji; Kurose, Eiji; Fujii, Kiyoshi

    2005-07-01

    We studied the effects of polarization control that is expected to minimize image degradation caused by the polarization effect for various patterns. The resolution of line-and-space (L&S) patterns was most enhanced by dipole illumination under polarization control. However, the polarization control did not improve resolution in dense contacts, although this was improved by normal quadrupole illumination. Consequently, it will be difficult to achieve the same resolution in dense contacts as in L&S patterns, even when advanced illumination and polarization control are applied. The resolution gap between L&S and dense contacts may reach up to a 40 nm pitch in the 45 nm node, particularly for immersion lithography using a hyper numerical aperture. We also found that 157 nm dry/immersion lithography has an advantage over 193 nm immersion lithography from the viewpoint of resolution gaps, on the basis of the assumption that both technologies would achieve the same resolution in L&S patterns.

  3. Operation and maintenance manual for the high resolution stereoscopic video camera system (HRSVS) system 6230

    SciTech Connect

    Pardini, A.F., Westinghouse Hanford

    1996-07-16

    The High Resolution Stereoscopic Video Cameral System (HRSVS),system 6230, is a stereoscopic camera system that will be used as an end effector on the LDUA to perform surveillance and inspection activities within Hanford waste tanks. It is attached to the LDUA by means of a Tool Interface Plate (TIP), which provides a feed through for all electrical and pneumatic utilities needed by the end effector to operate.

  4. A high-resolution numerical technique for inviscid gas-dynamic problems with weak solutions

    NASA Technical Reports Server (NTRS)

    Yee, H. C.; Warming, R. F.; Harten, A.

    1982-01-01

    The shock resolution of Harten's (1982) second-order explicit method for one-dimensional hyperbolic conservation laws is investigated for a two-dimensional gas-dynamic problem. The possible extension to a high resolution implicit method for both one- and two-dimensional problems is also investigated. Applications of Harten's method to the quasi-one-dimensional nozzle problem with two nozzle shapes (divergent and convergent-divergent) and the two-dimensional shock-reflection problem resulted in high shock resolution steady-state numerical solutions.

  5. The problems and benefits of associating academic medical centers with health-maintenance organizations.

    PubMed

    Hoft, R H; Glaser, R J

    1982-12-30

    The growth of prepaid medical-care programs has caused the leaders of a number of academic medical centers to begin to have an increased interest in affiliating with or sponsoring centers in prepaid programs -- otherwise known as health-maintenance organizations (HMOs)--is motivated by a number of potential benefits. An HMO may provide an academic medical center with an additional source of patients for teaching and research; generate additional revenue; increase resources for education in primary care; increase the exposure of students, residents, and faculty to the characteristics of prepaid medical practice; and improve the delivery of health services locally. Issues of importance to the academic medical center include the pros and cons of sponsorship of, as opposed to affiliation with, an HMO and the additional costs attributable to medical education in the HMO setting. Problems may arise between HMOs and medical centers as a result of disparate styles of practice, the high cost of clinical services at the medical center, and the differing perspectives of HMO and medical-center policy makers. PMID:7144867

  6. OPTIMIZATION AS A TOOL FOR CONSISTENCY MAINTENANCE IN MULTI-RESOLUTION SIMULATION

    E-print Network

    Huang, Wei

    environmental models which were used as a case study to test our ideas. Also presented in Section 2, Virginia 22904-4740, U.S.A. William R. Emanuel Department of Environmental Science University of Virginia benefit from a complete and approachable solution to this problem, such solutions have proven extremely

  7. Anisotropic adaptive resolution of boundary layers for heat conduction problems

    E-print Network

    Dolejsi, Vit

    , Germany Key words finite volume method, thermoregulation, maximum principle, anisotropic adaptation. MSC is known as well as for a real world problem of a computer simulation of the thermoregulation of premature

  8. Clarification process: Resolution of decision-problem conditions

    NASA Technical Reports Server (NTRS)

    Dieterly, D. L.

    1980-01-01

    A model of a general process which occurs in both decisionmaking and problem-solving tasks is presented. It is called the clarification model and is highly dependent on information flow. The model addresses the possible constraints of individual indifferences and experience in achieving success in resolving decision-problem conditions. As indicated, the application of the clarification process model is only necessary for certain classes of the basic decision-problem condition. With less complex decision problem conditions, certain phases of the model may be omitted. The model may be applied across a wide range of decision problem conditions. The model consists of two major components: (1) the five-phase prescriptive sequence (based on previous approaches to both concepts) and (2) the information manipulation function (which draws upon current ideas in the areas of information processing, computer programming, memory, and thinking). The two components are linked together to provide a structure that assists in understanding the process of resolving problems and making decisions.

  9. Baldwin's Two Developmental Resolutions of the Mind-Body Problem.

    ERIC Educational Resources Information Center

    Ferrari, Michel

    2003-01-01

    Pursues William Kessen's analysis of psychologist Baldwin's 1905 paper by examining Baldwin's two proposed solutions to the mind-body problem: the materialist solution and the idealist solution. Demonstrates that Baldwin's ideas presaged those of developmental theorists and philosophers. Discusses Baldwin's proposal that current scientific ideas…

  10. Resolution of dark matter problem in f(T) gravity

    E-print Network

    Mubasher Jamil; D. Momeni; Ratbay Myrzakulov

    2012-08-28

    In this paper, we attempt to resolve the dark matter problem in f(T) gravity. Specifically, from our model we successfully obtain the flat rotation curves of galaxies containing dark matter. Further, we obtain the density profile of dark matter in galaxies. Comparison of our analytical results shows that our torsion-based toy model for dark matter is in good agreement with empirical data-based models. It shows that we can address the dark matter as an effect of torsion of the space.

  11. A fine tuning free resolution of the cosmological constant problem

    SciTech Connect

    Alexander, Stephon; Vaid, Deepak

    2009-07-06

    In a recent paper we discovered that a fermionic condensate is formed from gravitational interactions due to the covariant coupling of fermions in the presence of a torsion-fermion contact interaction.The condensate gap gives a negative contribution to the bare cosmological constant. In this letter, we show that the cosmological constant problem can be solved without fine tuning of the bare cosmological constant. We demonstrate how a universe with a large initial cosmological constant undergoes inflation, during which time the energy gap grows as the volume of the universe. Eventually the gap becomes large enough to cancel out the bare cosmological term, inflation ends and we end up in a universe with an almost vanishing cosmological term. We provide a detailed numerical analysis of the system of equations governing the self regulating relaxation of the cosmological constant.

  12. A fine tuning free resolution of the cosmological constant problem

    E-print Network

    Stephon Alexander; Deepak Vaid

    2007-02-08

    In a recent paper we discovered that a fermionic condensate is formed from gravitational interactions due to the covariant coupling of fermions in the presence of a torsion-fermion contact interaction. The condensate gap gives a negative contribution to the bare cosmological constant. In this letter, we show that the cosmological constant problem can be solved without fine tuning of the bare cosmological constant. We demonstrate how a universe with a large initial cosmological constant undergoes inflation, during which time the energy gap grows as the volume of the universe. Eventually the gap becomes large enough to cancel out the bare cosmological term, inflation ends and we end up in a universe with an almost vanishing cosmological term. We provide a detailed numerical analysis of the system of equations governing the self regulating relaxation of the cosmological constant.

  13. Problems and Resolutions in the Practice of Project Teaching in Higher Vocational Schools

    ERIC Educational Resources Information Center

    Sheng, Zhichong; Tan, Jianhua

    2011-01-01

    Recently, there has been a hot discussion on project teaching theory among many higher vocational schools; however the practice of project teaching is still in the beginning period. Hence, many problems appear in project lead. This paper aims to analyze the existing problems in the practice of project teaching and also raise some resolutions.

  14. Towards the resolution of the solar neutrino problem

    SciTech Connect

    Friedland, Alexander

    2000-08-29

    A number of experiments have accumulated over the years a large amount of solar neutrino data. The data indicate that the observed solar neutrino flux is significantly smaller than expected and, furthermore, that the electron neutrino survival probability is energy dependent. This ''solar neutrino problem'' is best solved by assuming that the electron neutrino oscillates into another neutrino species. Even though one can classify the solar neutrino deficit as strong evidence for neutrino oscillations, it is not yet considered a definitive proof. Traditional objections are that the evidence for solar neutrino oscillations relies on a combination of hard, different experiments, and that the Standard Solar Model (SSM) might not be accurate enough to precisely predict the fluxes of different solar neutrino components. Even though it seems unlikely that modifications to the SSM alone can explain the current solar neutrino data, one still cannot completely discount the possibility that a combination of unknown systematic errors in some of the experiments and certain modifications to the SSM could conspire to yield the observed data. To conclusively demonstrate that there is indeed new physics in solar neutrinos, new experiments are aiming at detecting ''smoking gun'' signatures of neutrino oscillations, such as an anomalous seasonal variation in the observed neutrino flux or a day-night variation due to the regeneration of electron neutrinos in the Earth. In this dissertation we study the sensitivity reach of two upcoming neutrino experiments, Borexino and KamLAND, to both of these effects. Results of neutrino oscillation experiments for the case of two-flavor oscillations have always been presented on the (sin{sup 2} 2{theta}, {Delta}m{sup 2}) parameter space. We point out, however, that this parameterization misses the half of the parameter space {pi}/4 < {theta} {le} {pi}/2, which is physically inequivalent to the region 0 {le} {theta} {le} {pi}/4 in the presence of matter effects. The MSW solutions to the solar neutrino problem can extend to the ({theta} > {pi}/4) side. Furthermore, even the ''vacuum oscillation'' solutions are affected by solar matter effects and hence are different in the two sides.

  15. Behavioral Economic Analysis of Natural Resolution of Drinking Problems using IVR Self-Monitoring

    PubMed Central

    Tucker, Jalie A.; Foushee, H. Russell; Black, Bethany C.

    2008-01-01

    This study investigated whether a behavioral economic index of the value of rewards available over different time horizons predicted patterns of alcohol consumption shortly after natural resolution when the risk of relapse is high. Using a computerized Interactive Voice Response (IVR) telephone system, untreated problem drinkers (n = 41) self-monitored their daily drinking, monetary expenditures, and surrounding contexts over intervals that ranged from a maximum of 42 to 128 days. Expanded Timeline Followback interviews were conducted before and after the IVR interval and one year after the baseline assessment. Stable resolutions generally and moderation resolutions specifically were associated with proportionally more pre-resolution expenditures on savings and less on alcohol compared to heavy drinking outcomes. The findings replicated and extended earlier research and suggested that the extent to which problem drinkers organized their behavior over longer intervals, even when drinking abusively, helped identify who resolved, including who transitioned to stable moderation. PMID:18729688

  16. High Order And High Resolution Methods For a Model CAA Problem

    NASA Technical Reports Server (NTRS)

    Goodrich, John W.

    2004-01-01

    The initial value problem for the first order linear wave equation in one space dimension is treated for two cases with specified initial data and grid, and data from solutions at t = 400 and t = 800 are presented, as prescribed for Problem 1 in Category 1. Results are shown from computations with a sequence of recently developed high order and high resolution methods which combine Hermite interpolation, Cauchy-Kowaleskya recursion for time derivatives, and Taylor series time advancement. These methods have the same order of accuracy in time as in space. Results are shown from methods that range from third to nineteenth order. The stated problems with the prescribed coarse grid can be simulated with errors that are at the level of machine accuracy if the method is sufficiently high order. In addition, the growth of the maximum absolute error out to t = 100,000 is given for simulations with the stated problem data.

  17. Wilkinson Microwave Anisotropy Probe (WMAP) Battery Operations Problem Resolution Team (PRT)

    NASA Technical Reports Server (NTRS)

    Keys, Denney J.

    2010-01-01

    The NASA Technical Discipline Fellow for Electrical Power, was requested to form a Problem Resolution Team (PRT) to help assess the health of the flight battery that is currently operating aboard NASA's Wilkinson Microwave Anisotropy Probe (WMAP) and provide recommendations for battery operations to mitigate the risk of impacting science operations for the rest of the mission. This report contains the outcome of the PRT's assessment.

  18. Problems and process of identity maintenance in the anti-nuclear movement in America: a qualitative analysis

    SciTech Connect

    Tate, D.D.

    1982-01-01

    These strategic and tactical problems are examined within two basic areas of concern: (1) external public relations and (2) internal membership identify. This study contributes to the resource-mobilization perspective by theoretically reducing the significant variables of concern to external and internal identity maintenance and by stressing the constant dilemma between the structure of the movement and the actual process by which this structure is carried out. It is based on a social psychological analysis in which the dynamics of social movements is viewed both externally and internally in relation to the movement structure and process. The Sunbelt Alliance anti-nuclear group of Oklahoma is used as the empirical example. The research methodology consists of a series of focused personal interviews. The Sunbelt Alliance anti-nuclear organization experienced a dilemma resulting from the tension between external and internal contingencies. The promotion of cooperative interdependence based on member cohesiveness within the group suffered because of the inability of the organization to maintain consistent agreement concerning external targets. The structure of the group, or its goals and ideology, was not consistently reflected in its process. Disagreement over external priorities eventually reduced internal solidarity, and the organization dissolved.

  19. Applications of shallow high-resolution seismic reflection to various environmental problems

    USGS Publications Warehouse

    Miller, R.D.; Steeples, D.W.

    1994-01-01

    Shallow seismic reflection has been successfully applied to environmental problems in a variety of geologic settings. Increased dynamic range of recording equipment and decreased cost of processing hardware and software have made seismic reflection a cost-effective means of imaging shallow geologic targets. Seismic data possess sufficient resolution in many areas to detect faulting with displacement of less than 3 m and beds as thin as 1 m. We have detected reflections from depths as shallow as 2 m. Subsurface voids associated with abandoned coal mines at depths of less than 20 m can be detected and mapped. Seismic reflection has been successful in mapping disturbed subsurface associated with dissolution mining of salt. A graben detected and traced by seismic reflection was shown to be a preferential pathway for leachate leaking from a chemical storage pond. As shown by these case histories, shallow high-resolution seismic reflection has the potential to significantly enhance the economics and efficiency of preventing and/or solving many environmental problems. ?? 1994.

  20. Common ``unique'' cavity wall flashing problems: Mistakes frequently made, their resolution, and presentations from case histories

    SciTech Connect

    Wilson, M.D.

    1999-07-01

    Building design drawings for masonry cavity wall construction generally attempt to contain most of the information needed to instruct the construction team on the types and placement of wall flashings. Some unique, low frequency conditions are often not described in detail in the drawings, and reliance is placed on the contractors to detail and install these unique flashing areas for watertight performance, using the concepts shown in the drawings for other areas. Frequently the resulting installation does not perform well, and leakage and disputes result. Sometimes subcontractor trades do not realize or anticipate how their work interfaces with another trade. Masonry flashings that are possibly installed in a water-tight and well-performing manner can be damaged by other trades who do not realize the damage being caused, and the resulting combination leaks. One example is the manner in which window heads are sometimes anchored or fastened to the underside of steel shelf angles which support brick masonry veneer above. This paper will discuss several examples of common leakage problems in masonry cavity wall construction, attributed to the above two concepts. The resolution of the problems, performed in recent case histories, will be presented, with suggestions for changes in original design drawings to help prevent the problems.

  1. Minisuperspace model of Machian Resolution of Problem of Time. I. Isotropic Case

    E-print Network

    Anderson, Edward

    2013-01-01

    A local resolution to the Problem of Time that is Machian and was previously demonstrated for various relational mechanics models is here shown to work for a more widely studied quantum cosmological model. Namely, closed isotropic minisuperspace GR with minimally-coupled scalar field matter. This uses work firstly along the lines of Barbour's at the classical level. Secondly, it uses a Machianized version of the Semiclassical Approach to Quantum Cosmology. Finally, it uses a combined Machianized version of a combined Semiclassical Histories Timeless Records scheme along the lines of Halliwell's work. This program's goal is the treatment of Halliwell--Hawking type inhomogeneous perturbations about the present paper's model, drawing also qualitatively from the relational mechanics examples since these have nontrivial notions of inhomogeneity/structure (clumping) as well as nontrivial linear constraints.

  2. Minisuperspace model of Machian Resolution of Problem of Time. I. Isotropic Case

    E-print Network

    Edward Anderson

    2014-02-22

    A local resolution to the Problem of Time that is Machian and was previously demonstrated for various relational mechanics models is here shown to work for a more widely studied quantum cosmological model. Namely, closed isotropic minisuperspace GR with minimally-coupled scalar field matter. This uses work firstly along the lines of Barbour's at the classical level. Secondly, it uses a Machianized version of the Semiclassical Approach to Quantum Cosmology. Finally, it uses a combined Machianized version of a combined Semiclassical Histories Timeless Records scheme along the lines of Halliwell's work. This program's goal is the treatment of inhomogeneous perturbations about the present paper's model, drawing also qualitatively from the relational mechanics examples since these have nontrivial notions of inhomogeneity/structure (clumping) as well as nontrivial linear constraints.

  3. Problems associated with the preparation of whole mounts of cytoskeletons for high resolution electron microscopy.

    PubMed

    Bell, P B; Lindroth, M; Fredriksson, B A; Liu, X D

    1989-01-01

    The resolution currently available in both transmission and scanning electron microscopes is theoretically adequate to visualize the organization of the cytoskeleton at the supramolecular and macromolecular levels. However, achieving this resolution in practice requires that the methods used to prepare the specimens both preserve the structures of interest and render them visible for observation in the microscope without obscuring or altering them. In this paper we discuss our own and others efforts to develop methods to overcome several problems associated with preparing whole mounts of cytoskeletons for observation by electron microscopy. These problems include: controlling the degree to which cellular components are extracted; the effects of osmium tetroxide on the cytoskeleton; controlling and recognizing shrinkage and drying artifacts; the choice of a method of visualization; deposition of grain-free ultrathin films of metal; and interpreting the results. The standard procedure which we currently use consists of the following steps: growing cells on carbon-stabilized Formvar-coated gold electron microscope grids; extracting in 0.5% Triton X-100 detergent in a microtubule stabilizing buffer; postfixing in 2.5% glutaraldehyde in stabilizing buffer; freeze-drying; magnetron sputter-coating with 1.5 nm of tungsten; and observation by TEM, SEM, or STEM. Cytoskeletons prepared in this manner contain over 100 polypeptides and are composed of a complex three dimensional meshwork of clean, uniform filaments, the smallest of which are 7 nm in diameter. A structure resembling the microtrabecular lattice is present only if the cells are prefixed with a relatively long bifunctional protein crosslinking reagent prior to extraction with detergent. PMID:2694266

  4. Application of CFD analysis to design support and problem resolution for ASRM and RSRM

    NASA Astrophysics Data System (ADS)

    Dill, Richard A.; Whitesides, R. Harold

    1993-07-01

    The use of Navier-Stokes CFD codes to predict the internal flow field environment in a solid rocket motor is a very important analysis element during the design phase of a motor development program. These computational flow field solutions uncover a variety of potential problems associated with motor performance as well as suggesting solutions to these problems. CFD codes have also proven to be of great benefit in explaining problems associated with operational motors such as in the case of the pressure spike problem with the STS-54B flight motor. This paper presents results from analyses involving both motor design support and problem resolution. The issues discussed include the fluid dynamic/mechanical stress coupling at field joints relative to significant propellant deformations, the prediction of axial and radial pressure gradients in the motor associated with motor performance and propellant mechanical loading, the prediction of transition of the internal flow in the motor associated with erosive burning, the accumulation of slag at the field joints and in the submerged nozzle region, impingement of flow on the nozzle nose, and pressure gradients in the nozzle region of the motor. The analyses presented in this paper have been performed using a two-dimensional axisymmetric model. Fluent/BFC, a three dimensional Navier-Stokes flow field code, has been used to make the numerical calculations. This code utilizes a staggered grid formulation along with the SIMPLER numerical pressure-velocity coupling algorithm. Wall functions are used to represent the character of the viscous sub-layer flow, and an adjusted k-epsilon turbulence model especially configured for mass injection internal flows, is used to model the growth of turbulence in the motor port. Conclusions discussed in this paper consider flow field effects on the forward, center, and aft propellant grains except for the head end star grain region of the forward propellant segment. The field joints and the submerged nozzle are discussed as well. Conclusions relative to both the design evaluation of the ASRM and the RSRM scenarios explaining the pressure spikes were based on the flow field solutions presented in this paper.

  5. Application of CFD Analysis to Design Support and Problem Resolution for ASRM and RSRM

    NASA Technical Reports Server (NTRS)

    Dill, Richard A.; Whitesides, R. Harold

    1993-01-01

    The use of Navier-Stokes CFD codes to predict the internal flow field environment in a solid rocket motor is a very important analysis element during the design phase of a motor development program. These computational flow field solutions uncover a variety of potential problems associated with motor performance as well as suggesting solutions to these problems. CFD codes have also proven to be of great benefit in explaining problems associated with operational motors such as in the case of the pressure spike problem with the STS-54B flight motor. This paper presents results from analyses involving both motor design support and problem resolution. The issues discussed include the fluid dynamic/mechanical stress coupling at field joints relative to significant propellant deformations, the prediction of axial and radial pressure gradients in the motor associated with motor performance and propellant mechanical loading, the prediction of transition of the internal flow in the motor associated with erosive burning, the accumulation of slag at the field joints and in the submerged nozzle region, impingement of flow on the nozzle nose, and pressure gradients in the nozzle region of the motor. The analyses presented in this paper have been performed using a two-dimensional axisymmetric model. Fluent/BFC, a three dimensional Navier-Stokes flow field code, has been used to make the numerical calculations. This code utilizes a staggered grid formulation along with the SIMPLER numerical pressure-velocity coupling algorithm. Wall functions are used to represent the character of the viscous sub-layer flow, and an adjusted k-epsilon turbulence model especially configured for mass injection internal flows, is used to model the growth of turbulence in the motor port. Conclusions discussed in this paper consider flow field effects on the forward, center, and aft propellant grains except for the head end star grain region of the forward propellant segment. The field joints and the submerged nozzle are discussed as well. Conclusions relative to both the design evaluation of the ASRM and the RSRM scenarios explaining the pressure spikes were based on the flow field solutions presented in this paper.

  6. GUIDELINES FOR IMPLEMENTATION OF AN ADVANCED OUTAGE CONTROL CENTER TO IMPROVE OUTAGE COORDINATION, PROBLEM RESOLUTION, AND OUTAGE RISK MANAGEMENT

    SciTech Connect

    Germain, Shawn St; Farris, Ronald; Whaley, April M; Medema, Heather; Gertman, David

    2014-09-01

    This research effort is a part of the Light-Water Reactor Sustainability (LWRS) Program, which is a research and development (R&D) program sponsored by Department of Energy (DOE) and performed in close collaboration with industry R&D programs that provide the technical foundations for licensing and managing the long-term, safe, and economical operation of current nuclear power plants. The LWRS program serves to help the U.S. nuclear industry adopt new technologies and engineering solutions that facilitate the continued safe operation of the plants and extension of the current operating licenses. Managing NPP outages is a complex and difficult task due to the large number of maintenance and repair activities that are accomplished in a short period of time. During an outage, the outage control center (OCC) is the temporary command center for outage managers and provides several critical functions for the successful execution of the outage schedule. Essentially, the OCC functions to facilitate information inflow, assist outage management in processing information, and to facilitate the dissemination of information to stakeholders. Currently, outage management activities primarily rely on telephone communication, face to face reports of status, and periodic briefings in the OCC. It is a difficult task to maintain current the information related to outage progress and discovered conditions. Several advanced communication and collaboration technologies have shown promise for facilitating the information flow into, across, and out of the OCC. The use of these technologies will allow information to be shared electronically, providing greater amounts of real-time information to the decision makers and allowing OCC coordinators to meet with supporting staff remotely. Passively monitoring status electronically through advances in the areas of mobile worker technologies, computer-based procedures, and automated work packages will reduce the current reliance on manually reporting progress. The use of these technologies will also improve the knowledge capture and management capabilities of the organization. The purpose of this research is to improve management of NPP outages through the development of an advanced outage control center (AOCC) that is specifically designed to maximize the usefulness of communication and collaboration technologies for outage coordination and problem resolution activities. This technical report for industry implementation outlines methods and considerations for the establishment of an AOCC. This report provides a process for implementation of a change management plan, evaluation of current outage processes, the selection of technology, and guidance for the implementation of the selected technology. Methods are presented for both adoption of technologies within an existing OCC and for a complete OCC replacement, including human factors considerations for OCC design and setup.

  7. Problem 1: Imaging resolution The Hubble space telescope has a 2.4m aperture and effective focal length of 57.6m. Assuming the lens

    E-print Network

    Siegel, Paul H.

    Problem 1: Imaging resolution The Hubble space telescope has a 2.4m for (2). 4) If the Hubble telescope were located on UCSD's campus, what physical effect would limit the resolution? How could you modify the telescope

  8. The Application of High-Resolution Electron Microscopy to Problems in Solid State Chemistry: The Exploits of a Peeping TEM.

    ERIC Educational Resources Information Center

    Eyring, LeRoy

    1980-01-01

    Describes methods for using the high-resolution electron microscope in conjunction with other tools to reveal the identity and environment of atoms. Problems discussed include the ultimate structure of real crystalline solids including defect structure and the mechanisms of chemical reactions. (CS)

  9. Inhibitory Control Is Needed for the Resolution of Arithmetic Word Problems: A Developmental Negative Priming Study

    ERIC Educational Resources Information Center

    Lubin, Amélie; Vidal, Julie; Lanoë, Céline; Houdé, Olivier; Borst, Grégoire

    2013-01-01

    Solving simple arithmetic word problems is a major ability that children must acquire throughout the primary-grade mathematics curriculum. However, this skill is often challenging for them. For instance, "unknown referent problems" are more difficult to solve than "unknown compare problems." In unknown compare problems, the…

  10. Vegetation mapping using high resolution MSS (Multispectral Scanner) data: Canopy reflectance and shadow problems encountered and possible solutions

    SciTech Connect

    Jensen, J.R.; Hodgson, M.E.; Pinder, J.; Collins, B.S.; Mackey, H.E. Jr.

    1988-01-01

    High resolution Multispectral Scanner (MSS) data were acquired for an old field, successional habitat in South Carolina. The instrument used was a Daedalus Model DS-1268 having 1.5 x 1.5 m spatial resolution and 11 spectral bands. The goal was to map the vegetation of the study area and compute standing biomass. Upon examination of the MSS data, it became apparent that additional information would be required to accurately discriminate between the vegetation types because of (1) nonuniformity of canopy reflectance from individual trees due to sun angle and azimuth, and (2) shadows cast by trees. This paper describes the nature of the canopy reflectance problem, methods of removing the effects of shadows in high resolution MSS data, and the computation of biomass for the study area.

  11. General aviation avionics equipment maintenance

    NASA Technical Reports Server (NTRS)

    Parker, C. D.; Tommerdahl, J. B.

    1978-01-01

    Maintenance of general aviation avionics equipment was investigated with emphasis on single engine and light twin engine general aviation aircraft. Factors considered include the regulatory agencies, avionics manufacturers, avionics repair stations, the statistical character of the general aviation community, and owners and operators. The maintenance, environment, and performance, repair costs, and reliability of avionics were defined. It is concluded that a significant economic stratification is reflected in the maintenance problems encountered, that careful attention to installations and use practices can have a very positive impact on maintenance problems, and that new technologies and a general growth in general aviation will impact maintenance.

  12. A Geographer's Perspective of Contemporary Problems and Human Survival: An Introductory Course in Human Geography and Motorcycle Maintenance.

    ERIC Educational Resources Information Center

    McConnell, James E.

    The scientific community needs to reappraise its actions and become concerned with the real world problems that threaten existence in society. These include world poverty, starvation, and declining quality of life. Geographers need to develop greater concern resulting in evaluating their research, curricula, educational goals and course content in…

  13. Extended Subject Access to Hypertext Online Documentation. Parts I and II: The Search-Support and Maintenance Problems.

    ERIC Educational Resources Information Center

    Girill, T. R.; And Others

    1991-01-01

    Describes enhancements made to a hypertext information retrieval system at the National Energy Research Supercomputer Center (NERSC) called DFT (Document, Find, and Theseus). The enrichment of DFT's entry vocabulary is described, DFT and other hypertext systems are compared, and problems that occur due to the need for frequent updates are…

  14. On some transmission problems set in a biological cell, analysis and resolution

    NASA Astrophysics Data System (ADS)

    Labbas, Rabah; Lemrabet, Keddour; Limam, Kheira; Medeghri, Ahmed; Meisner, Maëlis

    2015-10-01

    Some transmission problems are set in bodies with a crown of small thickness ? > 0. For instance, those concerning the conductivity in the biological cell. By a natural change of variables, we transform them in transmission problems set in two cylindrical bodies ] - ?, 0 [ × ] - ?, ? [ and ] 0, ? [ × ] - ?, ? [ (where ? = ln ? (1 + ?)) and then, in some general elliptic abstract differential equations (P?) ? > 0. The goal of this work is to give a complete study of these problems (P?) ? > 0 for every ? > 0. Existence, uniqueness and maximal regularity results are obtained for the classical solutions essentially by using the semigroups theory.

  15. Compound classification by computer treatment of low resolution mass spectra - Application to geochemical and environmental problems.

    NASA Technical Reports Server (NTRS)

    Smith, D. H.; Eglinton, G.

    1972-01-01

    A description is given of a development of computer analysis of low-resolution chromatographic-mass spectrometric data, which provides a preliminary classification of an unknown spectrum as a listing of candidate classes of compounds. This procedure, referred to as COMSOC (Classification of Mass Spectra on Computers), operates by converting an incoming unknown mass spectrum into a simplified key word which is then compared with each of the key words held in its reference file. The advantages of COMSOC in characterizing complex mixtures are emphasized.

  16. Perceived Competency and Resolution of Homelessness Among Women with Substance Abuse Problems

    PubMed Central

    Finfgeld-Connett, Deborah; Bloom, Tina L.; Johnson, E. Diane

    2011-01-01

    Using a metasynthesis approach, our aim was to articulate new insights relating to the most efficient and effective means of helping homeless women with substance abuse problems to enhance their well-being and become more stably housed. Distorted perceptions of competency, which are shaped by dysfunctional relationships and mental health problems, make it challenging for women with substance abuse problems to resolve homelessness. Women with particularly low or high levels of perceived competency tend to grapple with challenges related to structure and control, trust, and hopelessness. Therapeutic strategies for approaching these women include careful assessment, caring, personalized structure and control, development of interpersonal trust, instillation of hope, and the targeted use of psychotherapeutic agents and counseling. Framing care for homeless women within the context of perceived competency offers a new way of understanding their plight and shaping interventions to more expeditiously move them toward healthy and stable lives. PMID:21890717

  17. Response to Contradiction: Conflict Resolution Strategies Used by Students in Solving Problems of Chemical Equilibrium.

    ERIC Educational Resources Information Center

    Niaz, Mansoor

    2001-01-01

    Illustrates how a novel problem of chemical equilibrium based on a closely related sequence of items can facilitate students' conceptual understanding. Students were presented with a chemical reaction in equilibrium to which a reactant was added as an external effect. Three studies were conducted to assess alternative conceptions. (Author/SAH)

  18. PREPP (Process Experimental Pilot Plant) rotary kiln seals: Problem and resolution

    SciTech Connect

    Drexler, R.L. )

    1990-01-01

    The Process Experimental Pilot Plant (PREPP) is a facility designed to demonstrate processing of low level chemical and transuranic hazardous waste. The plant includes equipment for handling the incoming waste containers, shredding, incineration and cooling the waste, grouting the residue and scrubbing and filtration of the off gas. The process incinerator is a rotary kiln approximately 8-{1/2} ft diameter and 25 ft long with a rotary seal assembly at each end. Each seal assembly consists of a primary, secondary and tertiary seal, with a positive air pressure between primary and secondary seals to prevent out-leakage from the kiln. The kiln operates at 0.5 inch water negative pressure. From the very outset the kiln seals exhibited excessive drag which taxed the kiln drive capacity and excessive in-leakage which limited kiln temperature. An engineering evaluation concluded that the original seals supplied by the kiln vendor could not accommodate expansion and centerline shift of the kiln resulting from heatup of the kiln and its support system. A totally new concept kiln seal design has been generated to replace the (modified) original seals. This new seal system has been designed to provide a very tight long lasting seal which will accommodate the 1.5 inch axial shift and up to 1 inch radial movement of the kiln shell. Design lifetime of the seal is 10,000 operating hours between major maintenance services while maintaining an acceptable leak rate hot or cold, rotating or stopped. The design appears adaptable to any size kiln and is suitable for retrofit to existing kilns. A one-third scale prototype seal assembly is being built to verify the concept prior to construction of the 10 ft diameter seals for the PREPP rotary kiln. 4 figs.

  19. Maintenance Downtime

    Atmospheric Science Data Center

    2013-07-10

    ... will be unavailable March 5, 2013 8:00 am to 5:00 pm due to database maintenance. Date(s):  Tuesday, March 5, 2013 ... will be unavailable March 5, 2013 8:00 am to 5:00 pm due to database maintenance. ...

  20. Maintenance Professional

    E-print Network

    Saskatchewan, University of

    Understanding how costs flow in an Enterprise System Budgeting/Forecasting Cost analysis for managementTRAINING THAT WORKS TRAINING THAT WORKS Maintenance Management Professional (MMP) Connect, Learn, ContributeConnect, ContributeLearn, Equip your Maintenance Managers with the tools they need to succeed. Our

  1. High-resolution cesium magnetometer surveys used as a tool to help solve water quality problems.

    NASA Astrophysics Data System (ADS)

    Rogers, Michael; Cassidy, James; Dragila, Maria

    2001-03-01

    On May 11, 1999 Oregon State University received notice from the Oregon Department of Agriculture of excessive levels of e.Coli in Oak Creek. Spraying liquid manure on OSU research diary fields is a strong candidate for the source, but the method of transport of manure from the fields to the creek remains elusive. During summer 2000, cesium magnetometers in vertical gradient mode successfully identified sub-surface pipes and features. A cesium gradiometer records the magnitude of the local earth's magnetic field to an accuracy of 0.1 nanotesla while taking a reading every tenth of a second. A high-resolution survey of portions of the dairy identified the magnetic signature of ceramic drain tiles, metal pipes, and other features that do not appear in historic documents. Future surveys will explore the extent and relationship of these sub-surface features, and identify their potential role in transporting manure from the dairy fields to Oak Creek.

  2. Multi-resolution subspace-based optimization method for solving three-dimensional inverse scattering problems.

    PubMed

    Ye, Xiuzhu; Poli, Lorenzo; Oliveri, Giacomo; Zhong, Yu; Agarwal, Krishna; Massa, Andrea; Chen, Xudong

    2015-11-01

    An innovative methodology is proposed to solve quantitative three-dimensional microwave imaging problems formulated within the contrast source framework. The introduced technique is based on the combination of an efficient iterative multiscaling strategy aimed at mitigating local minimum issue arising in inverse scattering problems, and a local search algorithm based on the subspace-based optimization method (SOM) devoted to effectively retrieving both the "deterministic" and the "ambiguous" parts of the unknown contrast currents. To achieve this goal, a nested iteration process is adopted in which the outer loop iteratively refines the region of interest (ROI) where the scatterers are detected, while the inner loop retrieves the dielectric properties of the scatterers within the ROIs. Selected numerical examples are also given to show the validity and robustness of the proposed algorithm in comparison with state-of-the-art techniques. PMID:26560937

  3. Clinical and technical problems related to acquisition of high-resolution videofluorographic images

    NASA Astrophysics Data System (ADS)

    Hynes, David M.; Edmonds, Ernest W.; Rowlands, John A.; Toth, B. D.; Porter, Anthony J.

    1990-06-01

    Teleradiology has been discussed for many years yet its use to thte has been limited. An important factor is the need for adequate image quality so that a diagnosis can be made with confidence. We have developed several generations of digital fluoroscopic units. We now operate four digital fluoroscopic x-ray rooms using large field-ofview intensifiers (40 cm) pulsed progressive readout TV technology and matrix sizes of 1024 X 1024 pixels. This paper will describe how the problems have been addressed. Fluoroscopy is a key component of the imaging armamentarium and digitization of the fluoroscopic image was a major image acquisition problem which has been overcome. The necessary technology with some examples of clinical reluctance will be presented to demonstrate that the digital fluorographic image (videofluorograph) is now ready for teleradiology and picture archiving and communication systems (PACS). We believe that this technology is appropriate for the front-end of a practical teleradiology system. We also briefly discuss the problems in telefluoroscopy. 1.

  4. MAD Gravity and the Early Universe: a Possible New Resolution to the Horizon and Monopole Problems.

    NASA Astrophysics Data System (ADS)

    Levin, Janna Jhone

    1993-01-01

    The standard cosmology is unable to explain the large-scale homogeneity and isotropy of the observed universe. In the standard model, our observable horizon contains many regions which were causally disconnected at earlier times. Consequently, the apparent smoothness of the observed universe is a mystery. Regions which could not have been in causal contact seem nonetheless to be identical in temperature and other such properties. In addition, the inclusion of grand unified theories into the standard cosmology gives rise to a cosmologically disastrous abundance of monopoles. Although the monopole problem has a very different source from the horizon problem, solutions to one are often intimately connected with solutions to the other. The horizon and monopole problems might be resolved if the universe grows old while it is still hot. We call this era of prolonged aging the MAD era. Extensions of Einstein gravity with a dynamical coupling strength G can provide such a MAD solution. Unlike an inflationary cosmology, there is no period of vacuum domination and possibly no entropy violation. If G is very small during an early hot era, then the expansion of the universe is slowed. Consequently, the universe cools slowly and is older at a given temperature than in a standard cosmology. An older universe has larger regions in causal contact which may become smooth without violating causality. Also, the large causal horizon can serve to dilute the monopole density. To complete the solution to these problems, the strength of G must grow quickly to reach the large value measured today. An actual mechanism which can drive the dynamical G from its proposed small early value to its large value observed today is still needed. We indicate directions to pursue to find a specific working model. In principle, while the strength of gravity grows the cosmic expansion accelerates. During this stage, density perturbations relevant for large-scale structure can possibly be produced. Inevitably, any perturbations would imprint a signature of an early MAD era on the cosmic background radiation. (Copies available exclusively from MIT Libraries, Rm. 14-0551, Cambridge, MA 02139-4307. Ph. 617-253-5668; Fax 617-253-1690.).

  5. High-resolution coupled physics solvers for analysing fine-scale nuclear reactor design problems

    PubMed Central

    Mahadevan, Vijay S.; Merzari, Elia; Tautges, Timothy; Jain, Rajeev; Obabko, Aleksandr; Smith, Michael; Fischer, Paul

    2014-01-01

    An integrated multi-physics simulation capability for the design and analysis of current and future nuclear reactor models is being investigated, to tightly couple neutron transport and thermal-hydraulics physics under the SHARP framework. Over several years, high-fidelity, validated mono-physics solvers with proven scalability on petascale architectures have been developed independently. Based on a unified component-based architecture, these existing codes can be coupled with a mesh-data backplane and a flexible coupling-strategy-based driver suite to produce a viable tool for analysts. The goal of the SHARP framework is to perform fully resolved coupled physics analysis of a reactor on heterogeneous geometry, in order to reduce the overall numerical uncertainty while leveraging available computational resources. The coupling methodology and software interfaces of the framework are presented, along with verification studies on two representative fast sodium-cooled reactor demonstration problems to prove the usability of the SHARP framework. PMID:24982250

  6. S-Genius, a universal software platform with versatile inverse problem resolution for scatterometry

    NASA Astrophysics Data System (ADS)

    Fuard, David; Troscompt, Nicolas; El Kalyoubi, Ismael; Soulan, Sébastien; Besacier, Maxime

    2013-05-01

    S-Genius is a new universal scatterometry platform, which gathers all the LTM-CNRS know-how regarding the rigorous electromagnetic computation and several inverse problem solver solutions. This software platform is built to be a userfriendly, light, swift, accurate, user-oriented scatterometry tool, compatible with any ellipsometric measurements to fit and any types of pattern. It aims to combine a set of inverse problem solver capabilities — via adapted Levenberg- Marquard optimization, Kriging, Neural Network solutions — that greatly improve the reliability and the velocity of the solution determination. Furthermore, as the model solution is mainly vulnerable to materials optical properties, S-Genius may be coupled with an innovative material refractive indices determination. This paper will a little bit more focuses on the modified Levenberg-Marquardt optimization, one of the indirect method solver built up in parallel with the total SGenius software coding by yours truly. This modified Levenberg-Marquardt optimization corresponds to a Newton algorithm with an adapted damping parameter regarding the definition domains of the optimized parameters. Currently, S-Genius is technically ready for scientific collaboration, python-powered, multi-platform (windows/linux/macOS), multi-core, ready for 2D- (infinite features along the direction perpendicular to the incident plane), conical, and 3D-features computation, compatible with all kinds of input data from any possible ellipsometers (angle or wavelength resolved) or reflectometers, and widely used in our laboratory for resist trimming studies, etching features characterization (such as complex stack) or nano-imprint lithography measurements for instance. The work about kriging solver, neural network solver and material refractive indices determination is done (or about to) by other LTM members and about to be integrated on S-Genius platform.

  7. Reputation mechanism: From resolution for truthful online auctions to the model of optimal one-gambler problem

    SciTech Connect

    Bradonjic, Milan

    2009-01-01

    In this paper we study reputation mechanisms, and show how the notion of reputation can help us in building truthful online auction mechanisms. From the mechanism design prospective, we derive the conditions on and design a truthful online auction mechanism. Moreover, in the case when some agents may lay or cannot have the real knowledge about the other agents reputations, we derive the resolution of the auction, such that the mechanism is truthful. Consequently, we move forward to the optimal one-gambler/one-seller problem, and explain how that problem is refinement of the previously discussed online auction design in the presence of reputation mechanism. In the setting of the optimal one-gambler problem, we naturally rise and solve the specific question: What is an agent's optimal strategy, in order to maximize his revenue? We would like to stress that our analysis goes beyond the scope, which game theory usually discusses under the notion of reputation. We model one-player games, by introducing a new parameter (reputation), which helps us in predicting the agent's behavior, in real-world situations, such as, behavior of a gambler, real-estate dealer, etc.

  8. Floors: Selection and Maintenance.

    ERIC Educational Resources Information Center

    Berkeley, Bernard

    Flooring for institutional, commercial, and industrial use is described with regard to its selection, care, and maintenance. The following flooring and subflooring material categories are discussed--(1) resilient floor coverings, (2) carpeting, (3) masonry floors, (4) wood floors, and (5) "formed-in-place floors". The properties, problems,…

  9. Maintenance of School Facilities.

    ERIC Educational Resources Information Center

    Louisiana State Dept. of Education, Baton Rouge.

    Methods of preserving, protecting, and keeping buildings, grounds, and equipment in a satisfactory operating condition are described. Detailed information is presented concerning the maintenance of items classified as either interior or exterior facilities. The problems of fire prevention and safety are discussed, including the development of a…

  10. Solutions of the Taylor-Green Vortex Problem Using High-Resolution Explicit Finite Difference Methods

    NASA Technical Reports Server (NTRS)

    DeBonis, James R.

    2013-01-01

    A computational fluid dynamics code that solves the compressible Navier-Stokes equations was applied to the Taylor-Green vortex problem to examine the code s ability to accurately simulate the vortex decay and subsequent turbulence. The code, WRLES (Wave Resolving Large-Eddy Simulation), uses explicit central-differencing to compute the spatial derivatives and explicit Low Dispersion Runge-Kutta methods for the temporal discretization. The flow was first studied and characterized using Bogey & Bailley s 13-point dispersion relation preserving (DRP) scheme. The kinetic energy dissipation rate, computed both directly and from the enstrophy field, vorticity contours, and the energy spectra are examined. Results are in excellent agreement with a reference solution obtained using a spectral method and provide insight into computations of turbulent flows. In addition the following studies were performed: a comparison of 4th-, 8th-, 12th- and DRP spatial differencing schemes, the effect of the solution filtering on the results, the effect of large-eddy simulation sub-grid scale models, and the effect of high-order discretization of the viscous terms.

  11. Landscaping With Maintenance in Mind.

    ERIC Educational Resources Information Center

    Sorensen, Randy

    2000-01-01

    Examines school ground landscape design that enhances attractive of the school and provides for easier maintenance. Landscape design issues discussed include choice of grass, trees, and shrubs; irrigation; and safety and access. Other considerations for lessening maintenance problems for facility managers are also highlighted. (GR)

  12. Genetic variation and its maintenance

    SciTech Connect

    Roberts, D.F.; De Stefano, G.F.

    1986-01-01

    This book contains several papers divided among three sections. The section titles are: Genetic Diversity--Its Dimensions; Genetic Diversity--Its Origin and Maintenance; and Genetic Diversity--Applications and Problems of Complex Characters.

  13. Applications of high-resolution spatial discretization scheme and Jacobian-free Newton–Krylov method in two-phase flow problems

    SciTech Connect

    Zou, Ling; Zhao, Haihua; Zhang, Hongbin

    2015-09-01

    The majority of the existing reactor system analysis codes were developed using low-order numerical schemes in both space and time. In many nuclear thermal–hydraulics applications, it is desirable to use higher-order numerical schemes to reduce numerical errors. High-resolution spatial discretization schemes provide high order spatial accuracy in smooth regions and capture sharp spatial discontinuity without nonphysical spatial oscillations. In this work, we adapted an existing high-resolution spatial discretization scheme on staggered grids in two-phase flow applications. Fully implicit time integration schemes were also implemented to reduce numerical errors from operator-splitting types of time integration schemes. The resulting nonlinear system has been successfully solved using the Jacobian-free Newton–Krylov (JFNK) method. The high-resolution spatial discretization and high-order fully implicit time integration numerical schemes were tested and numerically verified for several two-phase test problems, including a two-phase advection problem, a two-phase advection with phase appearance/disappearance problem, and the water faucet problem. Numerical results clearly demonstrated the advantages of using such high-resolution spatial and high-order temporal numerical schemes to significantly reduce numerical diffusion and therefore improve accuracy. Our study also demonstrated that the JFNK method is stable and robust in solving two-phase flow problems, even when phase appearance/disappearance exists.

  14. Reaction Control System Thruster Cracking Consultation: NASA Engineering and Safety Center (NESC) Materials Super Problem Resolution Team (SPRT) Findings

    NASA Technical Reports Server (NTRS)

    MacKay, Rebecca A.; Smith, Stephen W.; Shah, Sandeep R.; Piascik, Robert S.

    2005-01-01

    The shuttle orbiter s reaction control system (RCS) primary thruster serial number 120 was found to contain cracks in the counter bores and relief radius after a chamber repair and rejuvenation was performed in April 2004. Relief radius cracking had been observed in the 1970s and 1980s in seven thrusters prior to flight; however, counter bore cracking had never been seen previously in RCS thrusters. Members of the Materials Super Problem Resolution Team (SPRT) of the NASA Engineering and Safety Center (NESC) conducted a detailed review of the relevant literature and of the documentation from the previous RCS thruster failure analyses. It was concluded that the previous failure analyses lacked sufficient documentation to support the conclusions that stress corrosion cracking or hot-salt cracking was the root cause of the thruster cracking and lacked reliable inspection controls to prevent cracked thrusters from entering the fleet. The NESC team identified and performed new materials characterization and mechanical tests. It was determined that the thruster intergranular cracking was due to hydrogen embrittlement and that the cracking was produced during manufacturing as a result of processing the thrusters with fluoride-containing acids. Testing and characterization demonstrated that appreciable environmental crack propagation does not occur after manufacturing.

  15. Design and maintenance of a network for collecting high-resolution suspended-sediment data at remote locations on rivers, with examples from the Colorado River

    USGS Publications Warehouse

    Griffiths, Ronald E.; Topping, David J.; Andrews, Timothy; Bennett, Glenn E.; Sabol, Thomas A.; Melis, Theodore S.

    2012-01-01

    Management of sand and finer sediment in fluvial settings has become increasingly important for reasons ranging from endangered-species habitat to transport of sediment-associated contaminants. In all rivers, some fraction of the suspended load is transported as washload, and some as suspended bed material. Typically, the washload is composed of silt-and-clay-size sediment, and the suspended bed material is composed of sand-size sediment. In most rivers, as a result of changes in the upstream supply of silt and clay, large, systematic changes in the concentration of the washload occur over time, independent of changes in water discharge. Recent work has shown that large, systematic, discharge-independent changes in the concentration of the suspended bed material are also present in many rivers. In bedrock canyon rivers, such as the Colorado River in Grand Canyon National Park, changes in the upstream tributary supply of sand may cause large changes in the grain-size distribution of the bed sand, resulting in changes in both the concentration and grain-size distribution of the sand in suspension. Large discharge-independent changes in suspended-sand concentration coupled to discharge-independent changes in the grain-size distribution of the suspended sand are not unique to bedrock canyon rivers, but also occur in large alluvial rivers, such as the Mississippi River. These systematic changes in either suspended-silt-and-clay concentration or suspended-sand concentration may not be detectable by using conventional equal-discharge- or equal-width-increment measurements, which may be too infrequently collected relative to the time scale over which these changes in the sediment load are occurring. Furthermore, because large discharge-independent changes in both suspended-silt-and-clay and suspended-sand concentration are possible in many rivers, methods using water discharge as a proxy for suspended-sediment concentration (such as sediment rating curves) may not produce sufficiently accurate estimates of sediment loads. Finally, conventional suspended-sediment measurements are both labor and cost intensive and may not be possible at the resolution required to resolve discharge-independent changes in suspended-sediment concentration, especially in more remote locations. For these reasons, the U.S. Geological Survey has pursued the use of surrogate technologies (such as acoustic and laser diffraction) for providing higher-resolution measurements of suspended-sediment concentration and grain size than are possible by using conventional suspended-sediment measurements alone. These factors prompted the U.S. Geological Survey's Grand Canyon Monitoring and Research Center to design and construct a network to automatically measure suspended-sediment transport at 15-minute intervals by using acoustic and laser-diffraction surrogate technologies at remote locations along the Colorado River within Marble and Grand Canyons in Grand Canyon National Park. Because of the remoteness of the Colorado River in this reach, this network also included the design of a broadband satellite-telemetry system to communicate with the instruments deployed at each station in this network. Although the sediment-transport monitoring network described in this report was developed for the Colorado River in Grand Canyon National Park, the design of this network can easily be adapted for use on other rivers, no matter how remote. In the Colorado River case-study example described in this report, suspended-sediment concentration and grain size are measured at five remote stations. At each of these stations, surrogate measurements of suspended-sediment concentration and grain size are made at 15-minute intervals using an array of different single-frequency acoustic-Doppler side-looking profilers. Laser-diffraction instruments are also used at two of these stations to measure both suspended-sediment concentrations and grain-size distributions. Cross-section calibrations of these instruments have been constructed and verified by using either equal-discharge-increment

  16. Methadone maintenance.

    PubMed

    Russell-Taylor, W J

    1975-07-01

    Management of heroin addiction with oral methadone continues to create controversy. Since the first Dole-Nyswander experiments were reported almost a decade ago, methadone maintenance programs have been started in every major city in North America at an estimated public cost in the hundreds of millions of tax dollars. By the end of 1972, the United States alone spending at an annual rate in excess of $250 million, and an expenditure rate in excess of one billion dollars was occurring by the end of 1973. Despite the FDA investigational New Drug status of methadone when used for this purpose, objective data have still not been generated to substantiate the worth of Narcotic Substitution Therapy. Iatrogenic consequences are on the increase, and scepticism is growing among most pharmacologists. A critical evaluation of the entire methadone maintenance approach is being advocated by many and being attempted by some. Data currently being generated at the Philadelphia General Hospital suggest that many patients may have been better managed without methadone. PMID:809370

  17. Software Maintenance Maturity Model (SMmm The software maintenance process model

    E-print Network

    Hayes, Jane E.

    Software Maintenance Maturity Model (SMmm ): The software maintenance process model Alain April1 improvements to the software maintenance standards and introducing a proposed maturity model for daily software maintenance activities: Software Maintenance Maturity Model (SMmm ). The software maintenance function suffers

  18. Stick with a School Maintenance Plan

    ERIC Educational Resources Information Center

    Kennedy, Mike

    2012-01-01

    The U.S. Department of Education's "Planning Guide for Maintaining School Facilities" states that a sound facilities maintenance plan serves as evidence that school facilities are, and will be, cared for appropriately. On the other hand, negligent facilities maintenance planning can cause real problems. Budget restraints and cuts in areas not…

  19. Thermography instruments for predictive maintenance

    SciTech Connect

    Palko, E.

    1993-08-12

    Thermography (infrared imaging, or IR scanning) is not only the most versatile predictive maintenance technology available today; it is, in general, the most cost-effective. Plant engineering can apply a virtually unlimited variety of predictive maintenance instruments, but all are restricted regarding the types of existing and incipient problems they can detect. Inplant applications of thermography, however, are truly limited only by the extent of the plant engineer's imagination. Here are ways that thermography can be used to fight downtime in plants, and factors to consider when selecting the best instrument for particular circumstances.

  20. Deferred Maintenance Strategies You Must Try.

    ERIC Educational Resources Information Center

    Sturgeon, Julie

    2000-01-01

    Discusses how some college administrators have found "over-the-counter" cures for deferred maintenance problems resulting from budgeting shortfalls. Catch-up approaches discussed include those involving planning, prioritizing, partnering, and gift giving. (GR)

  1. The breakdown of an emergency system following a gas explosion in Osaka and the subsequent resolution of problems.

    PubMed

    Ishida, T; Ohta, M; Sugimoto, T

    1985-01-01

    Osaka, a modern urban metropolis in Japan, experienced a tragic gas explosion in 1970 when the dispatch room of the City Fire Department was in the process of being moved to a new building. Many unforseen problems arose during this disaster: eg, there was an overall lack of leadership, confusion of communication, a need for triage, and lack of control of mass media. The Osaka Medical Association organized a committee to resolve these problems. Their conclusions and recommendations were that a control headquarters be established at the scene of disaster, the number of ambulances and EMTs be increased, disaster tags be utilized, a special radio frequency be created, and a computer-aided command and control system for fire fighting and ambulance services be introduced. These recommendations have all been followed. PMID:3833919

  2. A Shadowing Problem in the Detection of Overlapping Communities: Lifting the Resolution Limit through a Cascading Procedure.

    PubMed

    Young, Jean-Gabriel; Allard, Antoine; Hébert-Dufresne, Laurent; Dubé, Louis J

    2015-01-01

    Community detection is the process of assigning nodes and links in significant communities (e.g. clusters, function modules) and its development has led to a better understanding of complex networks. When applied to sizable networks, we argue that most detection algorithms correctly identify prominent communities, but fail to do so across multiple scales. As a result, a significant fraction of the network is left uncharted. We show that this problem stems from larger or denser communities overshadowing smaller or sparser ones, and that this effect accounts for most of the undetected communities and unassigned links. We propose a generic cascading approach to community detection that circumvents the problem. Using real and artificial network datasets with three widely used community detection algorithms, we show how a simple cascading procedure allows for the detection of the missing communities. This work highlights a new detection limit of community structure, and we hope that our approach can inspire better community detection algorithms. PMID:26461919

  3. A Shadowing Problem in the Detection of Overlapping Communities: Lifting the Resolution Limit through a Cascading Procedure

    PubMed Central

    Young, Jean-Gabriel; Allard, Antoine; Hébert-Dufresne, Laurent; Dubé, Louis J.

    2015-01-01

    Community detection is the process of assigning nodes and links in significant communities (e.g. clusters, function modules) and its development has led to a better understanding of complex networks. When applied to sizable networks, we argue that most detection algorithms correctly identify prominent communities, but fail to do so across multiple scales. As a result, a significant fraction of the network is left uncharted. We show that this problem stems from larger or denser communities overshadowing smaller or sparser ones, and that this effect accounts for most of the undetected communities and unassigned links. We propose a generic cascading approach to community detection that circumvents the problem. Using real and artificial network datasets with three widely used community detection algorithms, we show how a simple cascading procedure allows for the detection of the missing communities. This work highlights a new detection limit of community structure, and we hope that our approach can inspire better community detection algorithms. PMID:26461919

  4. Maintenance operations and pollution prevention

    SciTech Connect

    Berglund, R.L.

    1995-09-01

    This chapter focuses on pollution prevention in industrial plant maintenance; continuing publicity surrounding environmental concerns suggests that the problems resulting from the generation of waste are approaching crisis proportions with the general public and have reached the highest levels of government. The initial reaction to these concerns has been the development of pollution prevention programs within most manufacturing plants. The long-term response must ben an emphasis on pollution prevention in all activities associated with manufacturing--from design and engineering through construction and operation. One area in which a pollution prevention orientation is crucial in maintenance, the vital link assuring that operation of the unit is able to achieve a performance level consistent with design and engineering. Many activities associated with maintenance, such as good housekeeping, tank cleaning, inventory control, and waste segregation, are among the first areas addressed in a pollution prevention program.

  5. Shawmut Hydroelectric Redevelopment project. Final operation and maintenance report

    SciTech Connect

    Not Available

    1984-06-01

    It is required that Central Maine Power Company furnish the DOE complete operation and maintenance data and generation cost statistics covering a period of two years following generation of first power at the Shawmut demonstration facility. The report discusses major design, operation and maintenance problems, energy production, operation and maintenance costs and the net cost of electricity for two years of commercial operation.

  6. Winter Maintenance Guidelines for Porous Asphalt Maintenance

    E-print Network

    Winter Maintenance Guidelines for Porous Asphalt General Maintenance · Plow after every storm · Up to ~75% net salt reductions for porous asphalt have been documented. USE SALT REDUCTION NUMBERS Asphalt Pavement Association (PAPA) Porous Asphalt Pavements Guide: http://www.pahotmix.org/PDF/porous1

  7. New collinear twist-3 analysis of transverse SSA: Toward a resolution for the sign-mismatch problem

    DOE PAGESBeta

    Kanazawa, Koichi; Pitonyak, Daniel; Koike, Yuji; Metz, Andreas

    2014-10-19

    We present a new collinear twist-3 analysis of the transverse SSA AN at RHIC. We use the TMD Sivers/Collins function to fix some of the relevant collinear twist-3 functions and perform a fit of the RHIC data with other parameterized twist-3 functions. This allows us to keep the consistency among descriptions in pp collision, SIDIS, and e+e– annihilation and thus could provide a unified description of the spin asymmetries in the low- and high-PT processes. In conclusion, by taking into account the twist-3 fragmentation contribution, we show for the first time this contribution could be the main source of ANmore »in pp? ? hX and its inclusion could provide a solution for the sign-mismatch problem.« less

  8. New collinear twist-3 analysis of transverse SSA: Toward a resolution for the sign-mismatch problem

    SciTech Connect

    Kanazawa, Koichi; Pitonyak, Daniel; Koike, Yuji; Metz, Andreas

    2014-10-19

    We present a new collinear twist-3 analysis of the transverse SSA AN at RHIC. We use the TMD Sivers/Collins function to fix some of the relevant collinear twist-3 functions and perform a fit of the RHIC data with other parameterized twist-3 functions. This allows us to keep the consistency among descriptions in pp collision, SIDIS, and e+e annihilation and thus could provide a unified description of the spin asymmetries in the low- and high-PT processes. In conclusion, by taking into account the twist-3 fragmentation contribution, we show for the first time this contribution could be the main source of AN in pp? ? hX and its inclusion could provide a solution for the sign-mismatch problem.

  9. Research requirements to reduce maintenance costs of civil helicopters

    NASA Technical Reports Server (NTRS)

    Million, D. J.; Waters, K. T.

    1978-01-01

    The maintenance problems faced by the operators of civil helicopters that result in high costs are documented. Existing technology that can be applied to reduce maintenance costs and research that should be carried out were identified. Good design practice and application of existing technology were described as having a significant impact on reducing maintenance costs immediately. The research and development that have potential for long range reduction of maintenance costs are presented.

  10. Maintenance of Mechanical Services. Maintenance and Renewal in Educational Buildings. Building Bulletin 70.

    ERIC Educational Resources Information Center

    Haworth-Roberts, A., Ed.

    School building maintenance must find an appropriate balance between planned and reactive work in order to conserve costs. This document provides ways in which authorities can assess their maintenance requirements and make better use of the resources available. It considers how to deal with problems which have their roots in historical design…

  11. Facilities maintenance handbook

    NASA Technical Reports Server (NTRS)

    1991-01-01

    This handbook is a guide for facilities maintenance managers. Its objective is to set minimum facilities maintenance standards. It also provides recommendations on how to meet the standards to ensure that NASA maintains its facilities in a manner that protects and preserves its investment in the facilities in a cost-effective manner while safely and efficiently performing its mission. This handbook implements NMI 8831.1, which states NASA facilities maintenance policy and assigns organizational responsibilities for the management of facilities maintenance activities on all properties under NASA jurisdiction. It is a reference for facilities maintenance managers, not a step-by-step procedural manual. Because of the differences in NASA Field Installation organizations, this handbook does not assume or recommend a typical facilities maintenance organization. Instead, it uses a systems approach to describe the functions that should be included in any facilities maintenance management system, regardless of its organizational structure. For documents referenced in the handbook, the most recent version of the documents is applicable. This handbook is divided into three parts: Part 1 specifies common definitions and facilities maintenance requirements and amplifies the policy requirements contained in NMI 8831. 1; Part 2 provides guidance on how to meet the requirements of Part 1, containing recommendations only; Part 3 contains general facilities maintenance information. One objective of this handbook is to fix commonality of facilities maintenance definitions among the Centers. This will permit the application of uniform measures of facilities conditions, of the relationship between current replacement value and maintenance resources required, and of the backlog of deferred facilities maintenance. The utilization of facilities maintenance system functions will allow the Centers to quantitatively define maintenance objectives in common terms, prepare work plans, and develop management information in order to statistically identify and analyze variances from those plans. It will also add credibility to the NASA facilities maintenance budgeting process. The key to a successful maintenance program is the understanding and support of the senior Center managers.

  12. Light Vehicle Preventive Maintenance.

    ERIC Educational Resources Information Center

    Marine Corps Inst., Washington, DC.

    This correspondence course, originally developed for the Marine Corps, is designed to instruct students in the performance of preventive maintenance on motor vehicles. Instructional materials are presented in three chapters as follows: (1) Major Maintenance Areas (maintenance system, tires, batteries, cooling systems, and vehicle lubrication; (2)…

  13. Asphalt in Pavement Maintenance.

    ERIC Educational Resources Information Center

    Asphalt Inst., College Park, MD.

    Maintenance methods that can be used equally well in all regions of the country have been developed for the use of asphalt in pavement maintenance. Specific information covering methods, equipment and terminology that applies to the use of asphalt in the maintenance of all types of pavement structures, including shoulders, is provided. In many…

  14. Innovation for maintenance technology improvements

    NASA Technical Reports Server (NTRS)

    Shives, T. R. (editor); Willard, W. A. (editor)

    1982-01-01

    A group of 34 submitted entries (32 papers and 2 abstracts) from the 33rd meeting of the Mechanical Failures Prevention Group whose subject was maintenance technology improvement through innovation. Areas of special emphasis included maintenance concepts, maintenance analysis systems, improved maintenance processes, innovative maintenance diagnostics and maintenance indicators, and technology improvements for power plant applications.

  15. Review of maintenance personnel practices at nuclear power plants

    SciTech Connect

    Chockie, A.D.; Badalamente, R.V.; Hostick, C.J.; Vickroy, S.C.; Bryant, J.L.; Imhoff, C.H.

    1984-05-01

    As part of the Nuclear Regulatory Commission (NRC) sponsored Maintenance Qualifications and Staffing Project, the Pacific Northwest Laboratory (PNL) has conducted a preliminary assessment of nuclear power plant (NPP) maintenance practices. As requested by the NRC, the following areas within the maintenance function were examined: personnel qualifications, maintenance training, overtime, shiftwork and staffing levels. The purpose of the assessment was to identify the primary safety-related problems that required further analysis before specific recommendations can be made on the regulations affecting NPP maintenance operations.

  16. 2. Space Inventory and Deferred Maintenance ii. Deferred Maintenance

    E-print Network

    Zandstra, Peter W.

    2. Space Inventory and Deferred Maintenance ii. Deferred Maintenance Figures a-b University existing and new facilities can improve the amount and quality of space. Addressing deferred maintenance to address deferred maintenance issues. #12;2. Space Inventory and Deferred Maintenance ii. Deferred

  17. 2. Space Inventory and Deferred Maintenance ii. Deferred Maintenance

    E-print Network

    Zandstra, Peter W.

    2. Space Inventory and Deferred Maintenance ii. Deferred Maintenance Figures a-b University existing and new facilities can improve the amount and quality of space. Addressing deferred maintenance.6 million #12;2. Space Inventory and Deferred Maintenance ii. Deferred Maintenance Figures a-b University

  18. MAINTENANCE MANAGEMENT PROFESSIONAL (MMP)

    E-print Network

    Saskatchewan, University of

    MAINTENANCE MANAGEMENT PROFESSIONAL (MMP) CERTIFICATE PROGRAM & Distance Education Ron and Jane for Continuing & Distance Education Module 1--Maintenance Management Skills and Techniques latest developments and trendsModule 1 introduces the basic concepts of physical asset management and the in effective

  19. UNIVERSITY OF FLORIDA MAINTENANCE

    E-print Network

    Sin, Peter

    UNIVERSITY OF FLORIDA ASBESTOS OPERATIONS AND MAINTENANCE PLAN Administered by: Environmental the University of Floridas Asbestos Operations and Maintenance (O&M) plan. The primary objective of this plan cancer in the lungs, larynx, trachea and other locations of the body. The debilitating respiratory

  20. Progressive Planned Maintenance.

    ERIC Educational Resources Information Center

    Lewis, Mary Jo; Jacobs, Richard S.

    A planned maintenance system, which was implemented at Washington State University (WSU), uniquely integrates functions of equipment inventory, scheduling, time reporting, project management, materials inventory, and billing. Management now has immediate access to equipment data, maintenance status, and costs. Staff requirements are readily…

  1. Maintenance of School Gymnasiums.

    ERIC Educational Resources Information Center

    Finchum, R. N.

    1965-01-01

    Procedures are suggested that may be helpful to those responsible for the operation and maintenance of school buildings and gymnasiums. Most schools with gymnasiums utilize them for both instructional and sports purposes. Maintenance of the multipurpose gym are discussed under four subject areas--(1) floors, (2) lighting, (3) sanitation, and (4)…

  2. Fixing Maintenance Productivity.

    ERIC Educational Resources Information Center

    Fickes, Michael

    2003-01-01

    Describes how one university's facility managers use Nextel communications technology in conjunction with a Famis Software maintenance management system to improve the productivity of its maintenance technicians. The system uses a wireless Internet connection to automate the flow of work order information to and from technicians. The key to these…

  3. Lawn Maintenance Safety 

    E-print Network

    Smith, David

    2005-07-12

    Most homeowners do not consider lawn maintenance to be dangerous. However lawn mowers, trimmers, edgers and other power equipment can cause minor to severe burns and lacerations, broken and dislocated bones, eye injuries and loss of fingers, toes...

  4. Woodwind Instrument Maintenance.

    ERIC Educational Resources Information Center

    Sperl, Gary

    1980-01-01

    The author presents a simple maintenance program for woodwind instruments which includes the care of tendon corks, the need for oiling keys, and methods of preventing cracks in woodwind instruments. (KC)

  5. Care and Maintenance.

    ERIC Educational Resources Information Center

    Hampton, Carolyn H.; Hampton, Carol D.

    1979-01-01

    The classroom care and maintenance of terrestrial isopods is described. Includes illustrations of isopod external anatomy, a potato trap for collecting isopods, and a constructed habitat for raising isopods. (MA)

  6. Temporal Resolution [Simplified Approach

    E-print Network

    Fisher, Michael

    , if an SNF problem 1. has only one eventuality (the single eventuality case), and 2. the sometime SNF Logic [TEMPORAL RESOLUTION: SIMPLER] ­ p.3/20 Simplified Example Let us begin with the simple set of SNF [TEMPORAL RESOLUTION: SIMPLER] ­ p.4/20 #12;Beyond SNF (1) The fact that we above deal with only sometime

  7. The $7-Billion Patch for Campus Maintenance

    ERIC Educational Resources Information Center

    Carlson, Scott

    2009-01-01

    Colleges are facing a growing deferred-maintenance problem, which at many public institutions adds up to repair bills in the hundreds of millions of dollars. Sometimes state legislatures have not supported those colleges at levels needed to maintain campus infrastructure. But at the same time, colleges continue to expand their campuses even as…

  8. Qualitative Analysis for Maintenance Process Assessment

    NASA Technical Reports Server (NTRS)

    Brand, Lionel; Kim, Yong-Mi; Melo, Walcelio; Seaman, Carolyn; Basili, Victor

    1996-01-01

    In order to improve software maintenance processes, we first need to be able to characterize and assess them. These tasks must be performed in depth and with objectivity since the problems are complex. One approach is to set up a measurement-based software process improvement program specifically aimed at maintenance. However, establishing a measurement program requires that one understands the problems to be addressed by the measurement program and is able to characterize the maintenance environment and processes in order to collect suitable and cost-effective data. Also, enacting such a program and getting usable data sets takes time. A short term substitute is therefore needed. We propose in this paper a characterization process aimed specifically at maintenance and based on a general qualitative analysis methodology. This process is rigorously defined in order to be repeatable and usable by people who are not acquainted with such analysis procedures. A basic feature of our approach is that actual implemented software changes are analyzed in order to understand the flaws in the maintenance process. Guidelines are provided and a case study is shown that demonstrates the usefulness of the approach.

  9. Reflective Teaching via a Problem Exploration--Teaching Adaptations--Resolution Cycle: A Mixed Methods Study of Preservice Teachers' Reflective Notes

    ERIC Educational Resources Information Center

    Hayden, H. Emily; Chiu, Ming Ming

    2015-01-01

    We explore development of elementary preservice teachers' reflective practices as they solved problems encountered while teaching in a reading clinic. Written reflections (N = 175) were collected across 8 weeks from 23 preservice teachers and analyzed to investigate relationships among problem exploration, teaching adaptations, and problem

  10. Generation and maintenance of recirculations by Gulf Stream instabilities

    E-print Network

    Beliakova, Natalia Yurievna, 1967-

    1999-01-01

    This thesis studies the problems of generation and maintenance of recirculations by Gulf Stream instabilities. Observations show that the horizontal structure of the jet and its recirculations suffer significant changes ...

  11. Health Maintenance Organizations and the Elderly: Promises, Problems, and Prospects. Hearing before the Select Committee on Aging. House of Representatives, Ninety-Eighth Congress, Second Session (Boca Raton, Florida).

    ERIC Educational Resources Information Center

    Congress of the U.S., Washington, DC. House Select Committee on Aging.

    This document contains the transcripts of witness testimony and prepared statements from the Congressional hearing called to explore the impact of the Health Maintenance Organization (HMO) on the health care system and on the elderly in particular. Opening statements are given from Representatives Dan Mica, Matthew Rinaldo, and Lawrence Smith.…

  12. Health Maintenance Organizations and the Elderly: Promises, Problems and Prospects. Hearing before the Select Committee on Aging. House of Representatives, Ninety-Ninth Congress, Second Session (Boynton Beach and Margate, FL). Part II.

    ERIC Educational Resources Information Center

    Congress of the U.S., Washington, DC. House Select Committee on Aging.

    This document contains witness testimonies and prepared statements from the Congressional hearing to examine the efficiency of health maintenance organizations (HMOs) in providing medical care to the elderly. Opening statements are given by Congressmen Mica and Boucher. The hearing is organized into a morning and afternoon session with each…

  13. Reliability Centered Maintenance - Methodologies

    NASA Technical Reports Server (NTRS)

    Kammerer, Catherine C.

    2009-01-01

    Journal article about Reliability Centered Maintenance (RCM) methodologies used by United Space Alliance, LLC (USA) in support of the Space Shuttle Program at Kennedy Space Center. The USA Reliability Centered Maintenance program differs from traditional RCM programs because various methodologies are utilized to take advantage of their respective strengths for each application. Based on operational experience, USA has customized the traditional RCM methodology into a streamlined lean logic path and has implemented the use of statistical tools to drive the process. USA RCM has integrated many of the L6S tools into both RCM methodologies. The tools utilized in the Measure, Analyze, and Improve phases of a Lean Six Sigma project lend themselves to application in the RCM process. All USA RCM methodologies meet the requirements defined in SAE JA 1011, Evaluation Criteria for Reliability-Centered Maintenance (RCM) Processes. The proposed article explores these methodologies.

  14. Intravenous maintenance fluids revisited.

    PubMed

    Cavari, Yuval; Pitfield, Alexander F; Kissoon, Niranjan

    2013-11-01

    Intravenous maintenance fluid therapy aims to replace daily urinary and insensible losses for ill children in whom adequate enteric administration of fluids is contraindicated or infeasible. The traditional determination of fluid volumes and composition dates back to Holliday and Segar's seminal article from 1957, which describes the relationship between weight, energy expenditure, and physiologic losses in healthy children. Combined with estimates of daily electrolyte requirements, this information supports the use of the hypotonic maintenance fluids that were widely used in pediatric medicine. However, using hypotonic intravenous fluids in a contemporary hospitalized patient who may have complex physiologic derangements, less caloric expenditure, decreased urinary output, and elevated antidiuretic hormone levels is often not optimal; evidence over the last 2 decades shows that it may lead to an increased incidence of hyponatremia. In this review, we present the evidence for using isotonic rather than hypotonic fluids as intravenous maintenance fluid. PMID:24196097

  15. Rig maintenance: An expensive, but necessary task

    SciTech Connect

    Moore, S.D.

    1986-01-01

    When times are tough-like they are today - the areas most drilling contractors cut back first are rig maintenance, training, and safety programs. However, all three are imperative programs that must be substained if a contractor expects to stay in business. Further, all three programs are interdependent. There's no doubt proper rig maintenance is expensive. For cash-strapped contractors, the seemingly extra financial burden of a rig maintenance program may appear too heavy. But according to the more successful contractors operating today, a planned preventive maintenance program is a necessity in saving the company money, reducing downtime, keeping a high standard of drilling performance, and providing safer operating conditions for workers. Suppose the mud pump, rotary table, or drill string fails. Immediately several problems can occur: Downtime could result, which in turn causes the contractor to lose revenue he may never recover. The failure could damage other rig components or jeopardize the safety of the rig crew. More than likely the cost to repair the failed piece of equipment is greater than what proper preventive maintenance would have cost. While repairs take place, the contractor has an idled crew and may be required to bring in additional workers to assist in repairs.

  16. School Maintenance Needs

    ERIC Educational Resources Information Center

    Erickson, Paul W.

    2011-01-01

    The United States is full of schools built in the 1950s and 60s that supported the boomer school-age enrollment increase. These schools, once beacons of the neighborhood, are 50 to 60 years old and susceptible to becoming the community "eyesore." Budgeting for maintenance was fairly systematic for school districts for the first 10 to 20 years…

  17. Electrical Maintenance Technician.

    ERIC Educational Resources Information Center

    Ohio State Univ., Columbus. Center on Education and Training for Employment.

    This document contains 30 units to consider for use in a tech prep competency profile for the occupation of electrical maintenance technician. All the units listed will not necessarily apply to every situation or tech prep consortium, nor will all the competencies within each unit be appropriate. Several units appear within each specific…

  18. Diesel Vehicle Maintenance Competencies.

    ERIC Educational Resources Information Center

    Braswell, Robert; And Others

    Designed to provide a model set of competencies, this manual presents tasks which were identified by employers, employees, and teachers as important in a postsecondary diesel vehicle maintenance curriculum. The tasks are divided into seven major component areas of instruction: chassis and suspension, diesel engines, diesel fuel, electrical,…

  19. Care and Maintenance.

    ERIC Educational Resources Information Center

    Hampton, Carol D.; Hampton, Carolyn H.

    1980-01-01

    Described is a method for bringing the sea into the classroom by setting up a saltwater aquarium. Included is selection of an aquarium, filtering systems, water (whether natural salt or synthetic sea salts), bottom materials, setting up an aquarium, system stabilization, stocking an aquarium, and maintenance of the aquarium. (DS)

  20. Floors: Care and Maintenance.

    ERIC Educational Resources Information Center

    Post Office Dept., Washington, DC.

    Guidelines, methods and policies regarding the care and maintenance of post office building floors are overviewed in this handbook. Procedures outlined are concerned with maintaining a required level of appearance without wasting manpower. Flooring types and characteristics and the particular cleaning requirements of each type are given along with…

  1. Sewer Maintenance Manual.

    ERIC Educational Resources Information Center

    Ontario Ministry of the Environment, Toronto.

    Outlined are practices and procedures that should be followed in order to protect and fully realize the benefits of sewer systems and also to maximize service and minimize inconveniences to the public. Written in practical terms, the manual is designed to be of immediate use to municipal employees and others involved in sewer maintenance

  2. CH Packaging Maintenance Manual

    SciTech Connect

    Washington TRU Solutions

    2002-01-02

    This procedure provides instructions for performing inner containment vessel (ICV) and outer containment vessel (OCV) maintenance and periodic leakage rate testing on the following packaging seals and corresponding seal surfaces using a nondestructive helium (He) leak test. In addition, this procedure provides instructions for performing ICV and OCV structural pressure tests.

  3. Operations and maintenance philosophy

    SciTech Connect

    DUNCAN, G.P.

    1999-10-28

    This Operations and Maintenance (O&M) Philosophy document is intended to establish a future O&M vision, with an increased focus on minimizing worker exposure, ensuring uninterrupted retrieval operations, and minimizing operation life-cycle cost. It is intended that this document would incorporate O&M lessons learned into on-going and future project upgrades.

  4. Developpement de competences de resolution reflexive de problemes environnementaux aupres d'enseignants en formation du Botswana: Apport d'un modele pedagogique base sur une recherche-action participative

    NASA Astrophysics Data System (ADS)

    Gauthier, Benoit

    2000-10-01

    Cette etude s'interesse au developpement de competences de resolution de problemes environnementaux dans un contexte culturel africain. Pour y parvenir, elle elabore un modele pedagogique pouvant se situer dans le cadre theorique de la vision reflexive emergeant presentement en education relative a l'environnement (ERE). Provenant du champ d'etude de la systemique, la methodologie des systemes souples (MSS) s'avere compatible avec le cadre de la reflexivite qui est emergent. Un modele pedagogique preliminaire fut ainsi etabli en transposant et en adaptant plusieurs des principes et des constituantes de la MSS au domaine de l'ERE. Ce modele, s'appuyant sur une strategie de recherche-action, a ete ensuite mis a l'essai aupres d'enseignants du secondaire en formation au Botswana, dans le cadre de leurs activites parascolaires. Cette recherche-developpement de type participatif s'appuie sur une analyse qualitative. Durant sa mise a l'essai, le modele preliminaire a subi plusieurs modifications generees entre autres par les interactions entre les participants et le facilitateur; ces modifications suggerent fortement une prise en charge par les participants de la demarche d'investigation, condition essentielle pour le developpement de competences de resolution de problemes environnementaux. Durant la demarche de resolution du probleme, des competences relatives a l'acquisition de connaissances sur la situation investiguee et a l'action environnementale ont ete sollicitees de maniere repetee. Ceci ne semble pas avoir ete le cas pour les competences associees a la reflexion par les participants sur leurs propres perceptions (metacognition), sur celles des autres ou encore sur la nature de la connaissance (cognition epistemique). En ce qui a trait a la conception de chaque apprenant concernant le probleme environnemental etudie, les observations recueillies tout au long de la demarche suggerent, pour certains des participants, une complexification. Le modele resultant de l'adaptation dans l'action par les participants presente ainsi un certain potentiel pour le developpement de plusieurs competences associees a la resolution de problemes environnementaux, et ce, dans un contexte transculturel. Cependant l'aspect reflexif associe a cette demarche demeure limite et demanderait a etre approfondi lors d'autres mises a l'essai.

  5. AUTOMOTIVE DIESEL MAINTENANCE. PROGRAM OUTLINE.

    ERIC Educational Resources Information Center

    Human Engineering Inst., Cleveland, OH.

    INFORMATIONAL TOPICS COVERED IN THE TEXT MATERIALS AND SELF-INSTRUCTIONAL BRANCH PROGRAMED TRAINING FILMS FOR A 2-YEAR, 55 MODULE PROGRAM IN AUTOMOTIVE DIESEL MAINTENANCE ARE GIVEN. THE 30 MODULES FOR "AUTOMOTIVE DIESEL MAINTENANCE 1" ARE AVAILABLE AS VT 005 655 - VT 005 684, AND THE 25 MODULES FOR "AUTOMOTIVE DIESEL MAINTENANCE 2" ARE AVAILABLE…

  6. CFB refractory maintenance

    SciTech Connect

    Johnson, R.C.

    1994-12-31

    The CFB maintenance manager has to make rapid-fire decisions regarding refractory maintenance during short or unscheduled turnarounds. This presentation offers a hands-on approach to expedient refractory failure analyses with specific repair recommendations. Photographs of most typical CFB refractory failures and their structural repairs are discussed. The most reliable repairs can be expected by using the latest state-of-the-art refractory materials and installation techniques. Refractory materials are consumable; therefore minor repairs should always be conducted at the first opportunity; this will preclude future major repairs. During a short or unscheduled outage, major repairs should be confined to the specific structural repair site; the removal of good, serviceable refractory is unnecessary under these conditions.

  7. Flight Crew Health Maintenance

    NASA Technical Reports Server (NTRS)

    Gullett, C. C.

    1970-01-01

    The health maintenance program for commercial flight crew personnel includes diet, weight control, and exercise to prevent heart disease development and disability grounding. The very high correlation between hypertension and overweight in cardiovascular diseases significantly influences the prognosis for a coronary prone individual and results in a high rejection rate of active military pilots applying for civilian jobs. In addition to physical fitness the major items stressed in pilot selection are: emotional maturity, glucose tolerance, and family health history.

  8. Integrating radiological and maintenance information systems

    SciTech Connect

    Perrelli, L. )

    1986-01-01

    The maintenance planning and radiological information management functions at nuclear power stations are often supported by totally separate, stand-alone computer systems. Yet these functions overlap in several areas and share similar information needs. This article examines some of the problems inherent in the use of multiple systems, presents arguments for integrating the two functions under the umbrella of a large information management system, and discusses means of dealing with concerns about integration.

  9. Evaluation of Counseling Outcomes at a University Counseling Center: The Impact of Clinically Significant Change on Problem Resolution and Academic Functioning

    ERIC Educational Resources Information Center

    Choi, Keum-Hyeong; Buskey, Wendy; Johnson, Bonita

    2010-01-01

    The main purpose of this study was to investigate how receiving personal counseling at a university counseling center helps students deal with their personal problems and facilitates academic functioning. To that end, this study used both clinical and academic outcome measures that are relevant to the practice of counseling provided at a…

  10. Augmented reality application utility for aviation maintenance work instruction

    NASA Astrophysics Data System (ADS)

    Pourcho, John Bryan

    Current aviation maintenance work instructions do not display information effectively enough to prevent costly errors and safety concerns. Aircraft are complex assemblies of highly interrelated components that confound troubleshooting and can make the maintenance procedure difficult (Drury & Gramopadhye, 2001). The sophisticated nature of aircraft maintenance necessitates a revolutionized training intervention for aviation maintenance technicians (United States General Accounting Office, 2003). Quite simply, the paper based job task cards fall short of offering rapid access to technical data and the system or component visualization necessary for working on complex integrated aircraft systems. Possible solutions to this problem include upgraded standards for paper based task cards and the use of integrated 3D product definition used on various mobile platforms (Ropp, Thomas, Lee, Broyles, Lewin, Andreychek, & Nicol, 2013). Previous studies have shown that incorporation of 3D graphics in work instructions allow the user to more efficiently and accurately interpret maintenance information (Jackson & Batstone, 2008). For aircraft maintenance workers, the use of mobile 3D model-based task cards could make current paper task card standards obsolete with their ability to deliver relevant, synchronized information to and from the hangar. Unlike previous versions of 3D model-based definition task cards and paper task cards, which are currently used in the maintenance industry, 3D model based definition task cards have the potential to be more mobile and accessible. Utilizing augmented reality applications on mobile devices to seamlessly deliver 3D product definition on mobile devices could increase the efficiency, accuracy, and reduce the mental workload for technicians when performing maintenance tasks (Macchiarella, 2004). This proposal will serve as a literary review of the aviation maintenance industry, the spatial ability of maintenance technicians, and benefits of modern digital hardware to educate, point out gaps in research, and observe possible foundations on which to build the future of aviation maintenance job task cards leading to a the methodology of the proposed study.

  11. Revision of certification standards for aviation maintenance personnel

    NASA Technical Reports Server (NTRS)

    Vipond, Leslie K.

    1992-01-01

    Part 65, Subparts D and E, of the Federal Aviation Regulations (FAR) identify the certification requirements for aviation mechanics and aviation repairmen. The training, experience, privileges, ratings, recordkeeping, and currency requirements for aviation maintenance personnel are also addressed by those parts of the FAR. The recent emergence of the aging fleet problem and the introduction of new technologies, aircraft, engines, and aeronautical products has caused certain portions of these rules to become obsolete. Further, international political arrangements, such as bilateral airworthiness and maintenance agreements, International Civil Aviation Organization (ICAO) standards, certain international agreements for maintenance personnel training, and mechanic certificate reciprocity, have all impacted on the current regulatory policy.

  12. Towards the Maintenance of Population Diversity: A Hybrid Probabilistic Model Building Genetic Network

    E-print Network

    Fernandez, Thomas

    ), probabilistic model building genetic network programming (PM- BGNP), diversity maintenance. Summary Some problems. Most of the current PMBEAs suffer from the problem that the diversity of the genetic information89 ¡¡ Towards the Maintenance of Population Diversity: A Hybrid Probabilistic Model Building

  13. Optimal maintenance of a multi-unit system under dependencies

    NASA Astrophysics Data System (ADS)

    Sung, Ho-Joon

    The availability, or reliability, of an engineering component greatly influences the operational cost and safety characteristics of a modern system over its life-cycle. Until recently, the reliance on past empirical data has been the industry-standard practice to develop maintenance policies that provide the minimum level of system reliability. Because such empirically-derived policies are vulnerable to unforeseen or fast-changing external factors, recent advancements in the study of topic on maintenance, which is known as optimal maintenance problem, has gained considerable interest as a legitimate area of research. An extensive body of applicable work is available, ranging from those concerned with identifying maintenance policies aimed at providing required system availability at minimum possible cost, to topics on imperfect maintenance of multi-unit system under dependencies. Nonetheless, these existing mathematical approaches to solve for optimal maintenance policies must be treated with caution when considered for broader applications, as they are accompanied by specialized treatments to ease the mathematical derivation of unknown functions in both objective function and constraint for a given optimal maintenance problem. These unknown functions are defined as reliability measures in this thesis, and theses measures (e.g., expected number of failures, system renewal cycle, expected system up time, etc.) do not often lend themselves to possess closed-form formulas. It is thus quite common to impose simplifying assumptions on input probability distributions of components' lifetime or repair policies. Simplifying the complex structure of a multi-unit system to a k-out-of-n system by neglecting any sources of dependencies is another commonly practiced technique intended to increase the mathematical tractability of a particular model. This dissertation presents a proposal for an alternative methodology to solve optimal maintenance problems by aiming to achieve the same end-goals as Reliability Centered Maintenance (RCM). RCM was first introduced to the aircraft industry in an attempt to bridge the gap between the empirically-driven and theory-driven approaches to establishing optimal maintenance policies. Under RCM, qualitative processes that enable the prioritizing of functions based on the criticality and influence would be combined with mathematical modeling to obtain the optimal maintenance policies. Where this thesis work deviates from RCM is its proposal to directly apply quantitative processes to model the reliability measures in optimal maintenance problem. First, Monte Carlo (MC) simulation, in conjunction with a pre-determined Design of Experiments (DOE) table, can be used as a numerical means of obtaining the corresponding discrete simulated outcomes of the reliability measures based on the combination of decision variables (e.g., periodic preventive maintenance interval, trigger age for opportunistic maintenance, etc.). These discrete simulation results can then be regressed as Response Surface Equations (RSEs) with respect to the decision variables. Such an approach to represent the reliability measures with continuous surrogate functions (i.e., the RSEs) not only enables the application of the numerical optimization technique to solve for optimal maintenance policies, but also obviates the need to make mathematical assumptions or impose over-simplifications on the structure of a multi-unit system for the sake of mathematical tractability. The applicability of the proposed methodology to a real-world optimal maintenance problem is showcased through its application to a Time Limited Dispatch (TLD) of Full Authority Digital Engine Control (FADEC) system. In broader terms, this proof-of-concept exercise can be described as a constrained optimization problem, whose objective is to identify the optimal system inspection interval that guarantees a certain level of availability for a multi-unit system. A variety of reputable numerical techniques were used to model the problem as accurately as possible, including a

  14. Impact of Pharmaceutical Care interventions in the identification and resolution of drug-related problems and on quality of life in a group of elderly outpatients in Ribeirão Preto (SP), Brazil

    PubMed Central

    de Lyra, Divaldo Pereira; Kheir, Nadir; Abriata, Juliana Palma; da Rocha, Chiara Ermínia; dos Santos, Cláudia Benedita; Pelá, Irene Rosemir

    2007-01-01

    Objective To evaluate the impact of a Pharmaceutical Care service in the identification and resolution of drug-related problems (DRPs) and in quality of life (QoL) of a group of elderly outpatients with chronic health conditions. Methods 30 outpatients (aged 60–75-years old) were followed between August 2003 and July 2004 at a primary health care unit in Ribeirão Preto (SP), Brazil. Patients were scheduled monthly to meet with the researcher, who provided Pharmaceutical Care service (the intervention). Through Pharmaceutical Care, the pharmacist worked with the patient and other care providers to improve outcomes of drug therapy through focused education, care planning, and monitoring. Intervention outcomes were the number of DRPs prevented or resolved, and the impact on QoL. The Short Form-36 health survey was used to measure changes in QoL. Results The mean age of patients was 66 ± 5 years, 21 of whom had low literacy. During the study, 92 DRP were identified, 3.0 ± 1.5 problems per patient. By the end of the study, the interventions solved 69% of actual DRP and prevented 78.5% potential DRP. In addition, QoL showed improvement in 22 patients after DRP resolution or prevention. Conclusion Despite the limitations in this study that may affect generalizability of the results, this study demonstrates that humanistic and behavioral interventions based on the Pharmaceutical Care model were capable in reducing DRPs, and improve QoL in patients. PMID:18516258

  15. Maintenance and supply options

    NASA Technical Reports Server (NTRS)

    1988-01-01

    The object of the Maintenance and Supply Option was to develop a high level operational philosophy related to maintenance and supply operations and incorporate these concepts into the Lunar Base Study. Specific products to be generated during this task were three trade studies and a conceptual design of the Logistic Supply Module. The crew size study was performed to evaluate crew sizes from the baseline size of four to a crew size of eight and determine the preferred crew size. The second trade study was to determine the impact of extending surface stay times and recommend a preferred duration of stay time as a function of crew, consumables, and equipment support capabilities. The third trade study was an evaluation of packaging and storage methods to determine the preferred logistics approach to support the lunar base. A modified scenario was developed and served as the basis of the individual trade studies. Assumptions and guidelines were also developed from experience with Apollo programs, Space Shuttle operations, and Space Station studies. With this information, the trade studies were performed and a conceptual design for the Logistic Supply Module was developed.

  16. Risk-based maintenance modeling. Prioritization of maintenance importances and quantification of maintenance effectiveness

    SciTech Connect

    Vesely, W.E.; Rezos, J.T.

    1995-09-01

    This report describes methods for prioritizing the risk importances of maintenances using a Probabilistic Risk Assessment (PRA). Approaches then are described for quantifying their reliability and risk effects. Two different PRA importance measures, minimal cutset importances and risk reduction importances, were used to prioritize maintenances; the findings show that both give similar results if appropriate criteria are used. The justifications for the particular importance measures also are developed. The methods developed to quantify the reliability and risk effects of maintenance actions are extensions of the usual reliability models now used in PRAs. These extended models consider degraded states of the component, and quantify the benefits of maintenance in correcting degradations and preventing failures. The negative effects of maintenance, including downtimes, also are included. These models are specific types of Markov models. The data for these models can be obtained from plant maintenance logs and from the Nuclear Plant Reliability Data System (NPRDS). To explore the potential usefulness of these models, the authors analyzed a range of postulated values of input data. These models were used to examine maintenance effects on a components reliability and performance for various maintenance programs and component data. Maintenance schedules were analyzed to optimize the component`s availability. In specific cases, the effects of maintenance were found to be large.

  17. Sustainability of green space maintenance

    E-print Network

    Nomura, Wataru

    2011-01-01

    In Japan, recent changes in socio-economic and political structures -- decreasing tax revenue, declining communication among community members, and privatization of public services-- have influenced existing maintenance ...

  18. TCMS operations and maintenance philosophy

    NASA Technical Reports Server (NTRS)

    Buehler, David P.; Griffin, Rock E.

    1992-01-01

    The purpose is to describe the basic philosophies of operating and maintaining the Test, Control, and Monitor System (TCMS) equipment. TCMS is a complex and sophisticated checkout system. Operations and maintenance processes developed to support it will be based upon current experience, but will be focused on the specific needs of TCMS in support of Space Station Freedom Program (SSFP) and related activities. An overview of the operations and maintenance goals and philosophies are presented. The assumptions, roles and responsibilities, concepts and interfaces for operation, on-line maintenance, off-line support, and Operations and Maintenance (O&M) personnel training on all TCMS equipment located at KSC are described.

  19. 49 CFR 214.503 - Good-faith challenges; procedures for notification and resolution.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... Roadway Maintenance Machines and Hi-Rail Vehicles § 214.503 Good-faith challenges; procedures for notification and resolution. (a) An employee operating an on-track roadway maintenance machine or hi-rail.... (b) Any employee charged with operating an on-track roadway maintenance machine or hi-rail...

  20. Maintenance Audit through Value Analysis Technique: A Case Study

    NASA Astrophysics Data System (ADS)

    Carnero, M. C.; Delgado, S.

    2008-11-01

    The increase in competitiveness, technological changes and the increase in the requirements of quality and service have forced a change in the design and application of maintenance, as well as the way in which it is considered within the managerial strategy. There are numerous maintenance activities that must be developed in a service company. As a result the maintenance functions as a whole have to be outsourced. Nevertheless, delegating this subject to specialized personnel does not exempt the company from responsibilities, but rather leads to the need for control of each maintenance activity. In order to achieve this control and to evaluate the efficiency and effectiveness of the company it is essential to carry out an audit that diagnoses the problems that could develop. In this paper a maintenance audit applied to a service company is developed. The methodology applied is based on the expert systems. The expert system by means of rules uses the weighting technique SMART and value analysis to obtain the weighting between the decision functions and between the alternatives. The expert system applies numerous rules and relations between different variables associated with the specific maintenance functions, to obtain the maintenance state by sections and the general maintenance state of the enterprise. The contributions of this paper are related to the development of a maintenance audit in a service enterprise, in which maintenance is not generally considered a strategic subject and to the integration of decision-making tools such as the weighting technique SMART with value analysis techniques, typical in the design of new products, in the area of the rule-based expert systems.

  1. IMIS: Integrated Maintenance Information System. A maintenance information delivery concept

    NASA Technical Reports Server (NTRS)

    Vonholle, Joseph C.

    1987-01-01

    The Integrated Maintenance Information System (IMIS) will optimize the use of available manpower, enhance technical performance, improve training, and reduce the support equipment and documentation needed for deployment. It will serve as the technician's single, integrated source of all the technical information required to perform modern aircraft maintenance.

  2. Illinois Occupational Skill Standards: Industrial Maintenance General Maintenance Cluster.

    ERIC Educational Resources Information Center

    Illinois Occupational Skill Standards and Credentialing Council, Carbondale.

    These skill standards for the industrial maintenance general maintenance cluster are intended to be a guide to workforce preparation program providers in defining content for their programs and to employers to establish the skills and standards necessary for job acquisition. An introduction provides the Illinois perspective; Illinois Occupational…

  3. Towards Agile Ontology Maintenance

    NASA Astrophysics Data System (ADS)

    Luczak-Rösch, Markus

    Ontologies are an appropriate means to represent knowledge on the Web. Research on ontology engineering reached practices for an integrative lifecycle support. However, a broader success of ontologies in Web-based information systems remains unreached while the more lightweight semantic approaches are rather successful. We assume, paired with the emerging trend of services and microservices on the Web, new dynamic scenarios gain momentum in which a shared knowledge base is made available to several dynamically changing services with disparate requirements. Our work envisions a step towards such a dynamic scenario in which an ontology adapts to the requirements of the accessing services and applications as well as the user's needs in an agile way and reduces the experts' involvement in ontology maintenance processes.

  4. Maintenance of an angle between planes of orbits in multisatellite systems

    NASA Astrophysics Data System (ADS)

    Baranov, A. A.; Budyansky, A. A.; Chernov, N. V.

    2015-09-01

    The problem of the maintenance of an angle between planes of orbits in a multisatellite system is considered. It is assumed that one of the satellites is active, to be later used for the servicing of a spacecraft located in an orbit of another level. Simple maintenance of system configuration is also considered. Various schemes of the maintenance of the angle including schemes that provide the minimum angle between the planes of the orbits at the time of the optimal phase mismatch for approach maneuvers. Four examples of the solution of the problem are given that make it possible to estimate the effectiveness of various maintenance schemes.

  5. Automotive Engine Maintenance and Repair.

    ERIC Educational Resources Information Center

    Marine Corps Inst., Washington, DC.

    This correspondence course, originally developed for the Marine Corps, is designed to provide students with an understanding of automotive engine maintenance and repair. The course contains six study units covering automotive engine maintenance and repair; design classification; engine malfunction, diagnosis, and repair; engine disassembly; engine…

  6. Achieving world class maintenance status

    SciTech Connect

    Tomlingson, P.D.

    2007-08-15

    The article written by a management consultant, discusses the art of successful planning and operation of maintenance in mines considering factors such as benchmaking, key performance indices (KPIs) and frequency of procedures which can help achieve 'world class maintenance'. 1 fig.

  7. Practical considerations in developing an instrument-maintenance plan--

    SciTech Connect

    Guth, M.A.S. )

    1989-06-01

    The author develops a general set of considerations to explain how a consistent, well-organized, prioritized, and adequate time-allowance program plan for routine maintenance can be constructed. The analysis is supplemented with experience from the high flux isotope reactor (HFIR) at US Oak Ridge National Laboratory (ORNL). After the preventive maintenance (PM) problem was defined, the instruments on the schedule were selected based on the manufacturer's design specifications, quality-assurance requirements, prior classifications, experiences with the incidence of breakdowns or calibration, and dependencies among instruments. The effects of repair error in PM should be also studied. The HFIR requires three full-time technicians to perform both PM and unscheduled maintenance. A review is presented of concepts from queuing theory to determine anticipated breakdown patterns. In practice, the pneumatic instruments have a much longer lifetime than the electric/electronic instruments on various reactors at ORNL. Some special considerations and risk aversion in choosing a maintenance schedule.

  8. Robots for Aircraft Maintenance

    NASA Technical Reports Server (NTRS)

    1993-01-01

    Marshall Space Flight Center charged USBI (now Pratt & Whitney) with the task of developing an advanced stripping system based on hydroblasting to strip paint and thermal protection material from Space Shuttle solid rocket boosters. A robot, mounted on a transportable platform, controls the waterjet angle, water pressure and flow rate. This technology, now known as ARMS, has found commercial applications in the removal of coatings from jet engine components. The system is significantly faster than manual procedures and uses only minimal labor. Because the amount of "substrate" lost is minimal, the life of the component is extended. The need for toxic chemicals is reduced, as is waste disposal and human protection equipment. Users of the ARMS work cell include Delta Air Lines and the Air Force, which later contracted with USBI for development of a Large Aircraft Paint Stripping system (LARPS). LARPS' advantages are similar to ARMS, and it has enormous potential in military and civil aircraft maintenance. The technology may also be adapted to aircraft painting, aircraft inspection techniques and paint stripping of large objects like ships and railcars.

  9. Psychological health maintenance on Space Station Freedom

    NASA Technical Reports Server (NTRS)

    Santy, Patricia A.

    1990-01-01

    The scheduling of crew rotations at intervals of as much as 180 days on NASA's Space Station Freedom entails that the cumulative effects of psychological, emotional, and social stressors on astronauts be monitored. The Space Station's Health Maintenance Facility (HMF) will furnish preventive, diagnostic, and therapeutic assistance for significant psychiatric and interpersonal problems. Mental health professionals must be part of the team of medical personnel charged with facilitating the physiological and phychological transition from earth to space and back. An account is presently given of the critical factors to be addressed by HMF personnel on extended-duration missions.

  10. Optimal scheduling of fighter aircraft maintenance

    E-print Network

    Cho, Philip Y

    2011-01-01

    The effective scheduling of fighter aircraft maintenance in the Air Force is crucial to overall mission accomplishment. An effective maintenance scheduling policy maximizes the use of maintenance resources and aircraft ...

  11. Minimum Maintenance Planning for School Grounds.

    ERIC Educational Resources Information Center

    Bruning, Walter F.

    Several factors affecting school ground maintenance, including accessibility, site size, topography, exposure, and soil conditions, are discussed. Consideration is also given to site planning, maintenance materials, lawn development, and selection of maintenance equipment. (FS)

  12. HRFE Position Creation & Maintenance Academic Hourly

    E-print Network

    Lee, Tonghun

    HRFE­ Position Creation & Maintenance Academic Hourly Overview To support the process Position Creation & Maintenance from Transactions, 1. Enter Position number to be modified 2 position, go to HRFE and select Position Creation & Maintenance from Transactions 1. Select Create a New

  13. Sustainable Operations & Maintenance Implementation Support

    E-print Network

    that are used to arrive at a collective sustainable approach to existing buildings operations and maintenance equipment) and passive systems (natural), as well as plug loads, lighting, building envelope and equipment

  14. Managing Custodial and Maintenance Staffs.

    ERIC Educational Resources Information Center

    Fickes, Michael

    2001-01-01

    Presents some basic maintenance management techniques that can help schools meet their budgets, preserve staffing levels, meet productivity needs, and sustain quality services. Tips for staff recruitment, training, and retention are explored. (GR)

  15. Maintenance Downtime January 14, 2015

    Atmospheric Science Data Center

    2015-01-13

    ... January 14, 2015 Time:  07:00 am - 12:00 pm EST Event Impact:  • Connectivity to the Eosweb ... Reverb, and AMAPS may be unavailable from 7 am - 12 pm for scheduled maintenance. Data processing and distribution will be ...

  16. A Framework for Monitoring and Maintenance of a Tsunami Early Warning System using ITIL®

    NASA Astrophysics Data System (ADS)

    Gensch, Stephan; Günther, Michael; Henneberger, Ralph; Strollo, Angelo

    2013-04-01

    Within this work, we present our approach and ongoing efforts to establish monitoring and maintenance processes for Tsunami Early Warning Systems. Practical work is done within the context of the Indonesian Tsunami Warning System (INATEWS) at Badan Meteorologi, Klimatologi dan Geofisika (BMKG) in Jakarta, Indonesia. The German contribution is well known as GITEWS. INATEWS is composed of several thousand integrated system components and numerous software processes. Due to the heterogeneity and complexity of the system, as well as the high availability needs, being an operational TEWS, real-time monitoring, reporting and scheduled preventive maintenance are needed. To develop and install an organizational and operational methodology for maintenance processes for INATEWS, we asserted ITIL® methods and are in development of Standard Operating Procedures (SOP) together with BMKG operational and management staff. ITIL®-conforming methods are one means of IT Service Management which has been adopted by a variety of service oriented IT providers. An early warning system does not expose classical consumer services, but the dissemination of warning messages and an early warning as a product may nevertheless be viewed as distinct services provided by a TEWS. We applied methods from ITIL® to the modular and hierarchical components of an early warning center, where minimum requirements on service availability, reliability and correctness of the warning product exist, from dissemination down to each sensor component. We describe functions of actors that ensure management of incidents and problems, as well as managing applications, IT operations and further technical issues. For the components of the early warning system, we present a model of event detection and event resolution. Real-time monitoring provides automated health-checks. Errors lead to reports to designated targets. Preventive maintenance provides findings on data and system availability, and data quality. Each of the three may lead to event detection, which is filtered, categorized and prioritized. As soon as an event is detected, a corrective maintenance process is triggered, which is modeled as a circular process. The developed procedure is being tested on the full process chain for the seismic component. Afterwards, the model will be applied to the full INATEWS system. Although we present a tailor-made approach for INATEWS, the general schema of our approach can be useful for large and complex warning systems with a multitude of sensors and sensor systems that are widely geographically distributed. It may help to keep each component at a functional level, so that the final product, the dissemination of a warning message, is not going to be endangered, due to malfunction of a sub-component.

  17. Towards optimal database maintenance in wireless communication systems Amine Chohra

    E-print Network

    Firenze, Università degli Studi di

    in the database and the highly dynamic evolution of the environmental conditions, which characterize such target maintenance strategies, this paper tackles the problem in two steps. First, a method is outlined to identify at varying database and environmental parameter values leading to select, in each time period, the optimal

  18. Maintenance of Mechanical Equipment in Minnesota Schools, 1968 Survey.

    ERIC Educational Resources Information Center

    Larson, R. E.; Rust, L. W.

    Results of a one-year research program to study maintenance procedures for operating mechanical equipment were based on the determination of--(1) the present condition and level of performance of operating mechanical equipment, (2) the problems encountered by school administrators and custodial engineers pertaining to operating mechanical…

  19. Information Retrieval Applications in Software Maintenance and Evolution

    E-print Network

    Lawrie, Dawn J.

    life cycle. Each section first briefly defines the pro- blem considered and then describes its There is a growing interest in creating tools that can assist engineers in all phases of the software life cycle to the maintenance and evolution phase of the software life cycle and focus on problems such as feature location

  20. Optical Fiber Specifications For Long Term Maintenance

    NASA Astrophysics Data System (ADS)

    Skutnik, Bolesh J.

    1990-01-01

    In recent years the reliability of optical fibers in special environments has become of great concern in military, government and other specialty high performance applications. With the first exploratory installations of fiber-to-the-home confirming the inherent requirements for a robust optical fiber, the telecommunications market and operating companies have had to begin considering how to minimize long term maintenance of optical fiber systems, which are subjected to a much broader range of dangers than in long haul or station to station installations. This paper discusses some background information on the strength and fatigue of optical fibers/cables, their reliability issues and several points concerning design and lifetime predictions for such components/systems. It includes information on standards efforts in fiber reliability and environmental testing as well as on SPIE efforts to present up-to-date information on these topic areas. Its intent is to point out problem areas for long term maintenance and present current approaches to minimize these problems rather than present solutions.

  1. Optimizing with constraints: a case study in scheduling maintenance of electric power units

    E-print Network

    Dechter, Rina

    Optimizing with constraints: a case study in scheduling maintenance of electric power units Daniel, Irvine, CA 92717­3425 ffrost, dechterg@ics.uci.edu Abstract A well­studied problem in the electric power of the electric power industry: optimally scheduling preventative maintenance of power generating units within

  2. Virtual Reality as a Tool for Verification of Assembly and Maintenance

    E-print Network

    Zachmann, Gabriel

    Virtual Reality as a Tool for Verification of Assembly and Maintenance Processes Antonino Gomes de needed to apply virtual reality (VR) for virtual prototyping (VP) to verify assembly and maintenance to be among the leaders in applying virtual reality (VR) for real-world, non-trivial problems 1 . Although

  3. School Renovation and the Importance of Maintenance. [Interview with Charles Boney, Jr.].

    ERIC Educational Resources Information Center

    Butterfield, Eric

    Charles Boney, Jr., Director of Boney Architects, offers his views on school districts that build schools that have to be replaced too soon, general problems concerning renovation of older buildings, and keeping maintenance costs down. He discusses the types of flooring materials school districts should consider using to lower maintenance costs…

  4. Winter Maintenance of Sprinkler Irrigation Systems Howard Neibling, Extension Water Management Engineer

    E-print Network

    O'Laughlin, Jay

    Winter Maintenance of Sprinkler Irrigation Systems Howard Neibling, Extension Water Management Engineer University of Idaho Cooperative Extension System Water stress due to system breakdown during peak stress. A good winter maintenance program will help avoid these problems and assure water delivery when

  5. Fast Flux Test Facility (FFTF) maintenance provisions

    SciTech Connect

    Marshall, J.L.

    1981-05-01

    The Fast Flux Test Facility (FFTF) was designed with maintainability as a primary parameter, and facilities and provisions were designed into the plant to accommodate the maintenance function. This paper describes the FFTF and its systems. Special maintenance equipment and facilities for performing maintenance on radioactive components are discussed. Maintenance provisions designed into the plant to enhance maintainability are also described.

  6. Sexual dysfunction and psychological distress in methadone maintenance.

    PubMed

    Spring, W D; Willenbring, M L; Maddux, T L

    1992-11-01

    We administered the Derogatis Sexual Functioning Inventory to 25 methadone maintenance patients who had been on a stable dose of methadone for at least 2 months, and obtained ratings of depression and anxiety, levels of sex hormones, and liver function tests. Five subjects with significantly lower Global Sexual Satisfaction Index scores (p < .0001) had more psychological symptoms, higher methadone doses, poorer body image, and less sexual drive and satisfaction, but normal fund of sexual information and lifetime experience. Sexual dysfunction among methadone maintenance patients may be due to coexisting psychiatric problems rather than caused by opiates. Methadone patients presenting with sexual dysfunction should receive psychiatric evaluation. PMID:1446965

  7. [Which maintenance intravenous fluid in paediatrics in 2015?].

    PubMed

    Pauchard, J Y; Pittet, A; Gehri, M

    2015-01-14

    For 50 years, hypotonic solutions have been used as liquid of maintenance in paediatrics owing to the article of Holliday and Segar. For two decades, studies have shown that these hypotonic fluids can foster the acquisition of hyponatremias. The most recent literature data (meta-analysis and randomized studies) confirm that hypotonic fluids are not suitable for children hospitalized with surgical or medical problems. Current recommendations must take these results into account and advocate the use of isotonic saline solutions as maintenance intravenous fluid therapy. PMID:25799667

  8. Workshop in the sky. [maintenance operations in space

    NASA Technical Reports Server (NTRS)

    Levoy, Louis; Reis, Donald F.; Quinn, Alberta

    1988-01-01

    An evaluation of the historical experience of Apollo, Skylab, and the Space Shuttle shows it to be both feasible and prudent to furnish a minimal capability for Space Station maintenance. The ability to perform orbital replacement unit-related maintenance, as well as opportune in-orbit repair, is believed to be essential for crew and Station survival, mission effectiveness, and maximum productivity. Attention is given to problems associated with mechanical repair, welding, and composite bonding, as well as to recommended tools and procedures.

  9. The impact of maintenance and rehabilitation strategies on the pavement network value 

    E-print Network

    Chang Albitres, Carlos Martin

    1999-01-01

    available for maintenance and rehabilitation creates a complex problem faced during the fund allocation process. Combinations of alternate funding levels and pavement management policies create different impacts on the network condition and future funding...

  10. 14 CFR 121.377 - Maintenance and preventive maintenance personnel duty time limitations.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 14 Aeronautics and Space 3 2010-01-01 2010-01-01 false Maintenance and preventive maintenance personnel duty time limitations. 121.377 Section 121.377 Aeronautics and Space FEDERAL AVIATION..., Preventive Maintenance, and Alterations § 121.377 Maintenance and preventive maintenance personnel duty...

  11. Test evaluation of space station ECLSS maintenance concepts. [Environmental Control and Life Support System

    NASA Technical Reports Server (NTRS)

    Reysa, R. P.; Flugel, C. W.; Thompson, C. D.

    1978-01-01

    The Space Station Prototype (SSP) Environmental Control and Life Support System (ECLSS) hardware was designed and built to be maintainable by the flight crew. To achieve this goal, subsystems were designed for ease of component removal and installation, which included accessibility to component fasteners and connectors, adequate tool clearance, minimum fluid loss during changeout, positive capture of loose parts during changeout, replacement by one crewman, and protection of adjacent parts during maintenance. During testing of this hardware, many day-to-day problems arose which allowed the evaluation of the maintenance concepts under actual maintenance conditions. This paper briefly discusses the maintenance objectives of the hardware design. Specific maintenance designs and their test evaluations are discussed. A removable cartridge valve concept for liquid line components and threaded mechanical fittings and V-band couplings for gaseous line components are critiqued. Other maintenance devices are also evaluated.

  12. VOLUME 86, NUMBER 8 P H Y S I C A L R E V I E W L E T T E R S 19 FEBRUARY 2001 Complex g-Ray Hologram: Solution to Twin Images Problem in Atomic Resolution Imaging

    E-print Network

    Korecki, Pawe³

    interference term (hologram) may be recorded, which results in the presence of twin images in real-space recon-Ray Hologram: Solution to Twin Images Problem in Atomic Resolution Imaging P. Korecki and G. Materlik Hamburger of atomic structure with g-ray holography is demonstrated. A complex hologram was constructed from holograms

  13. 14 CFR 43.3 - Persons authorized to perform maintenance, preventive maintenance, rebuilding, and alterations.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... perform preventive maintenance on an aircraft, airframe, aircraft engine, propeller, appliance, or..., aircraft engine, propeller, or appliance manufactured by him under a type or production certificate; (2... ADMINISTRATION, DEPARTMENT OF TRANSPORTATION AIRCRAFT MAINTENANCE, PREVENTIVE MAINTENANCE, REBUILDING,...

  14. 14 CFR 43.3 - Persons authorized to perform maintenance, preventive maintenance, rebuilding, and alterations.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... perform preventive maintenance on an aircraft, airframe, aircraft engine, propeller, appliance, or..., aircraft engine, propeller, or appliance manufactured by him under a type or production certificate; (2... ADMINISTRATION, DEPARTMENT OF TRANSPORTATION AIRCRAFT MAINTENANCE, PREVENTIVE MAINTENANCE, REBUILDING,...

  15. 14 CFR 43.3 - Persons authorized to perform maintenance, preventive maintenance, rebuilding, and alterations.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... maintain, rebuild, alter, or perform preventive maintenance on an aircraft, airframe, aircraft engine... may— (1) Rebuild or alter any aircraft, aircraft engine, propeller, or appliance manufactured by him... ADMINISTRATION, DEPARTMENT OF TRANSPORTATION AIRCRAFT MAINTENANCE, PREVENTIVE MAINTENANCE, REBUILDING,...

  16. A combinational theory for maintenance of sex

    PubMed Central

    Hörandl, E

    2010-01-01

    Sexual reproduction implies high costs, but it is difficult to give evidence for evolutionary advantages that would explain the predominance of meiotic sex in eukaryotes. A combinational theory discussing evolution, maintenance and loss of sex may resolve the problem. The main function of sex is the restoration of DNA and consequently a higher quality of offspring. Recombination at meiosis evolved, perhaps, as a repair mechanism of DNA strand damages. This mechanism is most efficient for DNA restoration in multicellular eukaryotes, because the initial cell starts with a re-optimized genome, which is passed to all the daughter cells. Meiosis acts also as creator of variation in haploid stages, in which selection can purge most efficiently deleterious mutations. A prolonged diploid phase buffers the effects of deleterious recessive alleles as well as epigenetic defects and is thus optimal for prolonged growth periods. For complex multicellular organisms, the main advantage of sexuality is thus the alternation of diploid and haploid stages, combining advantages of both. A loss of sex is constrained by several, partly group-specific, developmental features. Hybridization may trigger shifts from sexual to asexual reproduction, but crossing barriers of the parental sexual species limit this process. For the concerted break-up of meiosis-outcrossing cycles plus silencing of secondary features, various group-specific changes in the regulatory system may be required. An establishment of asexuals requires special functional modifications and environmental opportunities. Costs for maintenance of meiotic sex are consequently lower than a shift to asexual reproduction. PMID:19623209

  17. Video telehealth for weight maintenance of African-American women.

    PubMed

    Gerber, Ben S; Schiffer, Linda; Brown, Allison A; Berbaum, Michael L; Rimmer, James H; Braunschweig, Carol L; Fitzgibbon, Marian L

    2013-07-01

    We evaluated the effect of home telehealth on weight maintenance after a group-based weight loss programme. The home telehealth intervention comprised telephone counselling and home Internet-enabled digital video recorders (DVRs) with three channels of video programmes. The video content provided reinforcement and support to promote problem solving, prevent relapse and sustain motivation. Eighty-eight obese or overweight African-American women were randomized to receive monthly telephone counselling (control) or the home telehealth intervention. The weight change during maintenance was not significant in either group (0.6 kg in the intervention group, 0.0 kg in the control group), and there was no significant difference between them. Changes in diet, physical activity, social support and self-efficacy during the maintenance period did not differ significantly between groups. DVR use was low: during the intervention, the number of valid DVR viewings ranged from zero to 42 per person. DVR use was positively associated with previous attendance at the weight loss classes. Home video-based telehealth is a new method of delivering a weight loss maintenance intervention to African-American women. It had no effect on weight maintenance in the present study. PMID:24163236

  18. Weight loss maintenance: A review on dietary related strategies

    PubMed Central

    Soeliman, Fatemeh Azizi; Azadbakht, Leila

    2014-01-01

    Background: Weight regain after weight loss is a common problem for all those obese or overweight who have had a recent weight loss. Different cures such as diet therapy, behavioral therapy, exercise or a mixture of them have been advised as solutions. The purpose of this review is to find the best diet or eating pattern to maintain a recent weight loss. Materials and Methods: We searched in PubMed and SCOPUS by using the following key words: Overweight, obesity, weight maintenance, weight regain, and diet therapy. Finally, we assessed 26 articles in the present article. Results: Meal replacement, low carbohydrate-low glycemic index (GI) diet, high protein intake, and moderate fat consumption have shown some positive effects on weight maintenance. However, the results are controversial. A Dietary Approach to Stop Hypertension (DASH)-type diet seems helpful for weight maintenance although the need for more study has remained. Some special behaviors were associated with less weight regain, such as, not being awake late at night, drinking lower amount of sugar-sweetened beverages, and following a healthy pattern. Some special foods have been suggested for weight maintenance. However, the roles of specific foods are not confirmed. Conclusion: Healthy diets recommend low carbohydrate, low GI, and moderate fat foods, but it is not clear whether they are useful in preventing weight gain. It seems that consuming fewer calories helps people to keep weight loss. Further research to find strategies in obesity management focusing on successful maintenance of weight loss is needed. PMID:24949037

  19. Tools to support maintenance strategies under soft soil conditions

    NASA Astrophysics Data System (ADS)

    Lambert, J. W. M.; van Meerten, J. J.; Woning, M. P.; Eijbersen, M. J.; Huber, M.

    2015-11-01

    Costs for maintenance of infrastructure in municipalities with soft soil underground conditions, are estimated to be almost 40 % higher than in others. As a result, these municipalities meet financial problems that cause overdue maintenance. In some cases municipalities are even afraid to be unable to offer a minimum service level in future. In common, traditional practice, roads and sewerage systems have been constructed in trenches that consist of sandy material that replaces the upper meters of the soft soil. Under influence of its weight, this causes accelerated settlements of the construction. A number of alternative constructions have been developed, e.g. using light-weight materials to limit settlement velocity. In order to limit future maintenance costs, improvement of maintenance strategies is desired. Tools have been and will be developed to support municipalities in improving their maintenance strategies and save money by doing that. A model (BALANS) that weighs the attractiveness of alternative solutions under different soil, environmental and economic circumstances, will be presented.

  20. Afrikaans Language Maintenance in Australia

    ERIC Educational Resources Information Center

    Hatoss, Aniko; Starks, Donna; van Rensburg, Henriette Janse

    2011-01-01

    Changes in the political climate in the home country have resulted in the emigration of South Africans to English speaking countries such as Britain, Canada, Australia and New Zealand. Despite the scale of movement of the South African population, language maintenance in these diasporic contexts has received little consideration. This paper…

  1. New Directions in Maintenance Simulation.

    ERIC Educational Resources Information Center

    Miller, Gary G.

    A two-phase effort was conducted to design and evaluate a maintenance simulator which incorporated state-of-the-art information in simulation and instructional technology. The particular equipment selected to be simulated was the 6883 Convert/Flight Controls Test Station. Phase I included a generalized block diagram of the computer-trainer, the…

  2. School Facilities Maintenance and Operations.

    ERIC Educational Resources Information Center

    Association of School Business Officials of the United States and Canada, Park Ridge, IL. Research Corp.

    This publication presents a series of field-proven school energy conservation, management, maintenance, and operations practices and ideas. Also included are the names, addresses, and phone numbers of individuals and organizations to contact for more detailed information. The brief summaries are grouped into six sections. "Planning and Managing…

  3. Checklist for School Maintenance Surveys.

    ERIC Educational Resources Information Center

    Maryland State Dept. of Education, Baltimore.

    This document is a simple 34-category checklist to be used by technicians conducting maintenance surveys. Categories includes: roadways & parking lots; site appearance; site utilities; exterior appearance; playground equipment; exterior structural conditions; gutters and downspouts; windows and caulking; sidewalks; entryways and exit doors; roof…

  4. Drive alignment pays maintenance dividends

    SciTech Connect

    Fedder, R.

    2008-12-15

    Proper alignment of the motor and gear drive on conveying and processing equipment will result in longer bearing and coupling life, along with lower maintenance costs. Selecting an alignment free drive package instead of a traditional foot mounted drive and motor is a major advancement toward these goals. 4 photos.

  5. Maintenance Downtime April 1, 2015

    Atmospheric Science Data Center

    2015-03-30

    ... Wednesday, April 1, 2015 Time:  07:00 am - 12:00 pm EDT Event Impact:  The Data Pool, MISR order and ... Reverb, and AMAPS may be unavailable from 7 am - 12 pm for scheduled maintenance. Data processing and distribution will be ...

  6. Maintenance Downtime January 28, 2015

    Atmospheric Science Data Center

    2015-01-27

    ... January 28, 2015 Time:  06:00 am - 12:00 pm EDT Event Impact:  The Data Pool, MISR order and ... Reverb, and AMAPS may be unavailable from 6 am - 12 pm for scheduled maintenance. Data processing and distribution will be ...

  7. TITLE: FLEET MAINTENANCE OBJECTIVE AND

    E-print Network

    Fernandez, Eduardo

    equipment. The only vehicular maintenance performed includes minor tasks such as oil changes, wiper blade or recycled materials (oils, greases, aerosol cans, other vehicular fluids, used batteries, tires, etc will be cleaned as leaks or spills occur using appropriate methods such as clay absorbent or absorbent pads

  8. Avionics Maintenance Technology Program Guide.

    ERIC Educational Resources Information Center

    Georgia Univ., Athens. Dept. of Vocational Education.

    This program guide presents the avionics maintenance technology curriculum for technical institutes in Georgia. The general information section contains the following for both the diploma program and the associate degree program: purpose and objectives; program description, including admissions, typical job titles, and accreditation and…

  9. Methods to much improve maintenance.

    PubMed

    Lam, K C

    2004-11-01

    The benefits to be gained from the application of both value engineering (VE) and quality systems--e.g. quality assurance (QA), and total quality management (TQM)--to the management of building services maintenance have yet to be realised by the building services industry. These concepts are particularly applicable to complex hospital engineering services. PMID:15575550

  10. Reliability calculation under planned maintenance

    SciTech Connect

    Elmakis, D.; Levy, P.

    1987-02-01

    This paper provides an extension to methods for computing reliability indices in the case of planned maintenance, in particular, a new formula for the frequency of system failure due to overlapping of two outages, forced and planned, is derived for two components. A numerical example illustrates the possibilities of the proposed approach.

  11. Integrated production and maintenance scheduling 

    E-print Network

    Whitaker, Laura Oakes

    1996-01-01

    of maintenance being scheduled in this study. The topic was motivated by the electronic assembly industry. With increased automation of the assembly process, on-line information, such as quality or rate of the assembly process, has become more readily available...

  12. Tutoring electronic troubleshooting in a simulated maintenance work environment

    NASA Technical Reports Server (NTRS)

    Gott, Sherrie P.

    1987-01-01

    A series of intelligent tutoring systems, or intelligent maintenance simulators, is being developed based on expert and novice problem solving data. A graded series of authentic troubleshooting problems provides the curriculum, and adaptive instructional treatments foster active learning in trainees who engage in extensive fault isolation practice and thus in conditionalizing what they know. A proof of concept training study involving human tutoring was conducted as a precursor to the computer tutors to assess this integrated, problem based approach to task analysis and instruction. Statistically significant improvements in apprentice technicians' troubleshooting efficiency were achieved after approximately six hours of training.

  13. Maintenance of white adipose tissue in man.

    PubMed

    Hyvönen, Mervi T; Spalding, Kirsty L

    2014-11-01

    Obesity is increasing in an epidemic manner in most countries and constitutes a public health problem by enhancing the risk for diseases such as diabetes, fatty liver disease and atherosclerosis. Together these diseases form a cluster referred to as the metabolic syndrome. Despite the negative health consequences associated with excess adipose tissue, very little is known about the origin and maintenance of white adipose tissue in man. In this review we discuss what is known about the turnover of adult human adipocytes and their precursors, as well as adipose tissue heterogeneity, plasticity and developmental origins. The focus of this review is human tissue, however in many cases human data are missing and are inferred from animal studies. As such, reference to animal studies are made where human data is not available. This article is part of a directed issue entitled: Regenerative Medicine: the challenge of translation. PMID:25240584

  14. 46 CFR 122.702 - Maintenance.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ...Maintenance. (a) The manufacturer's instructions for onboard maintenance of survival craft, rescue boats, and launching appliances, manufactured on or after March 11, 1996, must be onboard a vessel of more than 19.8 meters (65 feet) in...

  15. 46 CFR 185.702 - Maintenance.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ...Maintenance. (a) The manufacturer's instructions for onboard maintenance of survival craft, rescue boats, and launching appliances, manufactured on or after March 11, 1996, must be onboard a vessel of more than 19.8 meters (65 feet) in...

  16. 46 CFR Sec. 9 - Maintenance of documents.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ...2011-10-01 2011-10-01 false Maintenance of documents. Sec. 9 Section 9 Shipping MARITIME ADMINISTRATION, DEPARTMENT...FOR FINANCIAL TRANSACTIONS UNDER AGENCY AGREEMENTS Documents Sec. 9 Maintenance of documents. The agent shall maintain...

  17. Improving maintenance operation through transformational outsourcing

    E-print Network

    Ye, Jacqueline Ming-Shih

    2007-01-01

    Outsourcing maintenance to third-party contractors has become an increasingly popular option for manufacturers to achieve tactical and/or strategic objectives. Though simple in concept, maintenance outsourcing is difficult ...

  18. 40 CFR 86.1725-99 - Maintenance.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ...General Provisions for the Voluntary National Low Emission Vehicle Program for Light-Duty Vehicles and Light-Duty Trucks § 86.1725-99 Maintenance...with a maintenance indicator consisting of a light that shall activate automatically by...

  19. 40 CFR 86.1725-99 - Maintenance.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ...General Provisions for the Voluntary National Low Emission Vehicle Program for Light-Duty Vehicles and Light-Duty Trucks § 86.1725-99 Maintenance...with a maintenance indicator consisting of a light that shall activate automatically by...

  20. 40 CFR 86.1725-99 - Maintenance.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...General Provisions for the Voluntary National Low Emission Vehicle Program for Light-Duty Vehicles and Light-Duty Trucks § 86.1725-99 Maintenance...with a maintenance indicator consisting of a light that shall activate automatically by...

  1. 40 CFR 86.1725-99 - Maintenance.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ...General Provisions for the Voluntary National Low Emission Vehicle Program for Light-Duty Vehicles and Light-Duty Trucks § 86.1725-99 Maintenance...with a maintenance indicator consisting of a light that shall activate automatically by...

  2. 22 CFR 120.38 - Maintenance levels.

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ...directly on the defense article or support...components, assemblies, and line-replaceable spares...or capability of the defense article. (b) Intermediate-level maintenance is second-level maintenance...or capability of the defense article. (c)...

  3. Maintenance cost studies of present aircraft subsystems

    E-print Network

    Pearlman, Chaim Herman Shalom

    1966-01-01

    This report describes two detailed studies of actual maintenance costs for present transport aircraft. The first part describes maintenance costs for jet transport aircraft broken down into subsystem costs according to an ...

  4. High resolution telescope

    SciTech Connect

    Massie, N.A.; Oster, Y.

    1990-12-31

    A large effective-aperture, low-cost optical telescope with diffraction-limited resolution enables ground-based observation of near-earth space objects. The telescope has a non-redundant, thinned-aperture array in a center-mount, single-structure space frame. It employs speckle interferometric imaging to achieve diffraction-limited resolution. The signal-to-noise ratio problem is mitigated by moving the wavelength of operation to the near-IR, and the image is sensed by a Silicon CCD. The steerable, single-structure array presents a constant pupil. The center-mount, radar-like mount enables low-earth orbit space objects to be tracked as well as increases stiffness of the space frame. In the preferred embodiment, the array has elemental telescopes with subaperture of 2.1m in a circle-of-nine configuration. The telescope array has an effective aperture of 12m which provides a diffraction-limited resolution of 0.02 arc seconds. Pathlength matching of the telescope array is maintained by an electro-optical system employing laser metrology. Speckle imaging relaxes pathlength matching tolerance by one order of magnitude as compared to phased arrays. Many features of the telescope contribute to substantial reduction in costs. These include eliminating the conventional protective dome and reducing on-site construction activities. The cost of the telescope scales with the first power of the aperture rather than its third power as in conventional telescopes. 9 figs., 1 tab.

  5. High resolution telescope

    SciTech Connect

    Massie, N.A.; Oster, Y.

    1990-01-01

    A large effective-aperture, low-cost optical telescope with diffraction-limited resolution enables ground-based observation of near-earth space objects. The telescope has a non-redundant, thinned-aperture array in a center-mount, single-structure space frame. It employs speckle interferometric imaging to achieve diffraction-limited resolution. The signal-to-noise ratio problem is mitigated by moving the wavelength of operation to the near-IR, and the image is sensed by a Silicon CCD. The steerable, single-structure array presents a constant pupil. The center-mount, radar-like mount enables low-earth orbit space objects to be tracked as well as increases stiffness of the space frame. In the preferred embodiment, the array has elemental telescopes with subaperture of 2.1m in a circle-of-nine configuration. The telescope array has an effective aperture of 12m which provides a diffraction-limited resolution of 0.02 arc seconds. Pathlength matching of the telescope array is maintained by an electro-optical system employing laser metrology. Speckle imaging relaxes pathlength matching tolerance by one order of magnitude as compared to phased arrays. Many features of the telescope contribute to substantial reduction in costs. These include eliminating the conventional protective dome and reducing on-site construction activities. The cost of the telescope scales with the first power of the aperture rather than its third power as in conventional telescopes. 9 figs., 1 tab.

  6. High resolution telescope

    DOEpatents

    Massie, Norbert A. (San Ramon, CA); Oster, Yale (Danville, CA)

    1992-01-01

    A large effective-aperture, low-cost optical telescope with diffraction-limited resolution enables ground-based observation of near-earth space objects. The telescope has a non-redundant, thinned-aperture array in a center-mount, single-structure space frame. It employs speckle interferometric imaging to achieve diffraction-limited resolution. The signal-to-noise ratio problem is mitigated by moving the wavelength of operation to the near-IR, and the image is sensed by a Silicon CCD. The steerable, single-structure array presents a constant pupil. The center-mount, radar-like mount enables low-earth orbit space objects to be tracked as well as increases stiffness of the space frame. In the preferred embodiment, the array has elemental telescopes with subaperture of 2.1 m in a circle-of-nine configuration. The telescope array has an effective aperture of 12 m which provides a diffraction-limited resolution of 0.02 arc seconds. Pathlength matching of the telescope array is maintained by an electro-optical system employing laser metrology. Speckle imaging relaxes pathlength matching tolerance by one order of magnitude as compared to phased arrays. Many features of the telescope contribute to substantial reduction in costs. These include eliminating the conventional protective dome and reducing on-site construction activites. The cost of the telescope scales with the first power of the aperture rather than its third power as in conventional telescopes.

  7. Multivariate curve resolution in liquid chromatography

    SciTech Connect

    Osten, D.W.; Kowalski, B.R.

    1983-12-01

    Self-modeling curve resolution has been shown to allow resolution of two co-eluting chromatographic peaks without requiring any assumption of an underlying peak shape. The subsequent problem of quantitation of these co-eluting peaks is limited by both the chromatographic resolution (separation in time and difference in elution profile) and by the degree of spectral uniqueness. An experimental system of two water-soluble vitamins has been used to examine the effects of varying chromatographic resolution on the quantitative accuracy of the curve resolution method.

  8. Reconcile: A Coreference Resolution Research Platform

    SciTech Connect

    Stoyanov, V; Cardie, C; Gilbert, N; Riloff, E; Buttler, D; Hysom, D

    2009-10-29

    Despite the availability of standard data sets and metrics, approaches to the problem of noun phrase coreference resolution are hard to compare empirically due to the different evaluation setting stemming, in part, from the lack of comprehensive coreference resolution research platforms. In this tech report we present Reconcile, a coreference resolution research platform that aims to facilitate the implementation of new approaches to coreference resolution as well as the comparison of existing approaches. We discuss Reconcile's architecture and give results of running Reconcile on six data sets using four evaluation metrics, showing that Reconcile's performance is comparable to state-of-the-art systems in coreference resolution.

  9. Institute for Software Technology Software Maintenance

    E-print Network

    1 Institute for Software Technology Software Maintenance VU 3.0 WS 2006 Univ.Prof. Dr. Franz Wotawa Institut für Softwaretechnologie wotawa@ist.tugraz.at VU Software Maintenance 2Institute for Software Technology Wozu Software Maintenance? Meine Software ist immer korrekt! Keine Modifikationen. Nur neue

  10. 47 CFR 87.69 - Maintenance tests.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 47 Telecommunication 5 2012-10-01 2012-10-01 false Maintenance tests. 87.69 Section 87.69... Operating Requirements and Procedures Operating Requirements § 87.69 Maintenance tests. The licensee may make routine maintenance tests on equipment other than emergency locator transmitters if there is...

  11. 49 CFR 260.39 - Maintenance standards.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 49 Transportation 4 2014-10-01 2014-10-01 false Maintenance standards. 260.39 Section 260.39... REHABILITATION AND IMPROVEMENT FINANCING PROGRAM Standards for Maintenance of Facilities Involved in the Project § 260.39 Maintenance standards. (a) When the proceeds of a direct loan or an obligation guaranteed...

  12. 49 CFR 260.39 - Maintenance standards.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 49 Transportation 4 2013-10-01 2013-10-01 false Maintenance standards. 260.39 Section 260.39... REHABILITATION AND IMPROVEMENT FINANCING PROGRAM Standards for Maintenance of Facilities Involved in the Project § 260.39 Maintenance standards. (a) When the proceeds of a direct loan or an obligation guaranteed...

  13. Laboratory services series: a programmed maintenance system

    SciTech Connect

    Tuxbury, D.C.; Srite, B.E.

    1980-01-01

    The diverse facilities, operations and equipment at a major national research and development laboratory require a systematic, analytical approach to operating equipment maintenance. A computer-scheduled preventive maintenance program is described including program development, equipment identification, maintenance and inspection instructions, scheduling, personnel, and equipment history.

  14. 49 CFR 37.203 - Lift maintenance.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 49 Transportation 1 2013-10-01 2013-10-01 false Lift maintenance. 37.203 Section 37.203 Transportation Office of the Secretary of Transportation TRANSPORTATION SERVICES FOR INDIVIDUALS WITH DISABILITIES (ADA) Over-the-Road Buses (OTRBs) § 37.203 Lift maintenance. (a) The entity shall establish a system of regular and frequent maintenance...

  15. Laboratory Maintenance of Nocardia Species.

    PubMed

    Dhakal, Dipesh; Sohng, Jae Kyung

    2015-01-01

    Nocardia spp. are aerobic, Gram-positive, catalase-positive, non-motile actinomycetes. Various species of the genus Nocardia have attracted attention due to their detrimental effects on human health. Recent discoveries, however, have exposed their importance as producers of bioactive compounds and degraders of complex organic compounds, as well as their involvement in biotransformation into valuable products. This unit includes general protocols for the laboratory maintenance of Nocardia spp., including growth in liquid medium, growth on solid agar, and long-term storage. Nocardia sp. CS682 (KCTC11297BP), isolated from soil collected in Jeonnam, Korea, is used as a prototype for explaining the considerations for efficient laboratory maintenance of Nocardia spp. © 2015 by John Wiley & Sons, Inc. PMID:26528780

  16. The Evidence Regarding Maintenance Tocolysis

    PubMed Central

    Elliott, John P.; Morrison, John C.

    2013-01-01

    Preterm delivery is a public health issue of major proportion. More than 12% of deliveries in the United States that occur at less than 37 weeks gestation preterm labor (PTL) represents the largest single reason for preterm birth (PTB). Attempts to prevent PTB have been unsuccessful. This paper of maintenance tocolytic therapy will examine the efficacy and safety of the drugs, both oral and subcutaneous, which have been utilized for prolongation of pregnancy following successful arrest of a documented episode of acute preterm labor. The evidence for oral tocolytics as maintenance therapy as well as parenteral medications for such patients is offered. Finally, the effects in the United States of the Food and Drug Administration (FDA) action on such medications are reported. PMID:23577034

  17. Mining Surveillance and Maintenance Dollars

    SciTech Connect

    MARTINEZ, R.

    2000-02-01

    Accelerating site cleanup to reduce facility risks to the workers, the public and the environment during a time of declining federal budgets represents a significant technical and economic challenge to U.S. Department of Energy (DOE) Operations Offices and their respective contractors. A significant portion of a facility's recurring annual expenses are associated with routine, long-term surveillance and maintenance (S&M) activities. However, ongoing S&M activities do nothing to reduce risks and basically spend money that could be reallocated towards facility deactivation. This paper discusses the background around DOE efforts to reduce surveillance and maintenance costs, one approach used to perform cost reviews, lessons learned from field implementation and what assistance is available to assist DOE sites in performing these evaluations.

  18. Contact | High Resolution Electron Microscopy

    Cancer.gov

    The long-term mission of our research program is to obtain an integrated, quantitative understanding of cells and viruses at molecular resolution. We take an interdisciplinary approach to this problem by combining novel technologies for 3D imaging with computational and cell biological tools.

  19. Turfgrass: Maintenance Costs in Texas. 

    E-print Network

    Holt, Ethan C.; Allen, W. Wayne; Ferguson, Marvin H.

    1964-01-01

    . College Station, Texas - S AGRICULTURAL EXPERIMENT STATION, R. E. Patterson, Director -.I Summa y Turfgrass production is a major agl enterprise in Texas, yet it is not easily c with other agricultural crops, since it proc economic yield. Turf... represents a Derma vestment in better living, ihe value of' whic be calculated in monetary units. Howe maintenance of turf costs money, and thc may be compared with the economic value agricultural production. In an effort to a enterprise more accurately...

  20. Orbital assembly and maintenance study

    NASA Technical Reports Server (NTRS)

    Gorman, D.; Grant, C.; Kyrias, G.; Lord, C.; Rombach, J.; Salis, M.; Skidmore, R.; Thomas, R.

    1975-01-01

    The requirements, conceptual design, tradeoffs, procedures, and techniques for orbital assembly of the support structure of the microwave power transmission system and the radio astronomy telescope are described. Thermal and stress analyses, packaging, alignment, and subsystems requirements are included along with manned vs. automated and transportation tradeoffs. Technical and operational concepts for the manned and automated maintenance of satellites were investigated and further developed results are presented.

  1. Themes from a Camp Maintenance Network: Camp Maintenance and Property Personnel Share Their Insights and Challenges.

    ERIC Educational Resources Information Center

    Whyman, Wynne

    2003-01-01

    A camp maintenance survey was completed by maintenance personnel from 99 camps. Results highlighted several important considerations: ensuring sufficient maintenance funds for aging infrastructure, including camp/property personnel in decision making, publicizing completed maintenance projects, examining long-term needs of the land, and adopting…

  2. Resolution analysis by random probing

    NASA Astrophysics Data System (ADS)

    Fichtner, Andreas; Leeuwen, Tristan van

    2015-08-01

    We develop and apply methods for resolution analysis in tomography, based on stochastic probing of the Hessian or resolution operators. Key properties of our methods are (i) low algorithmic complexity and easy implementation, (ii) applicability to any tomographic technique, including full-waveform inversion and linearized ray tomography, (iii) applicability in any spatial dimension and to inversions with a large number of model parameters, (iv) low computational costs that are mostly a fraction of those required for synthetic recovery tests, and (v) the ability to quantify both spatial resolution and interparameter trade-offs. Using synthetic full-waveform inversions as benchmarks, we demonstrate that autocorrelations of random-model applications to the Hessian yield various resolution measures, including direction- and position-dependent resolution lengths and the strength of interparameter mappings. We observe that the required number of random test models is around five in one, two, and three dimensions. This means that the proposed resolution analyses are not only more meaningful than recovery tests but also computationally less expensive. We demonstrate the applicability of our method in a 3-D real-data full-waveform inversion for the western Mediterranean. In addition to tomographic problems, resolution analysis by random probing may be used in other inverse methods that constrain continuously distributed properties, including electromagnetic and potential-field inversions, as well as recently emerging geodynamic data assimilation.

  3. FLIR A655sc High-Resolution LWIR Science-Grade

    E-print Network

    Walker, D. Greg

    temperature measurement data. Uncooled Microbolometer Detector ­ Maintenance-free and provides excellent Uncooled Microbolometer Spectral Range 7.5 ­ 14.0 µm Resolution 640 × 480 Detector Pitch 17 µm NETD

  4. 49 CFR 214.503 - Good-faith challenges; procedures for notification and resolution.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... Roadway Maintenance Machines and Hi-Rail Vehicles § 214.503 Good-faith challenges; procedures for notification and resolution. (a) An employee operating an on-track roadway maintenance machine or hi-rail vehicle shall inform the employer whenever the employee makes a good-faith determination that the...

  5. Crafting Elegant Solutions: Strategies for Conflict Resolution.

    ERIC Educational Resources Information Center

    Koch, Susan J.; Decker, Robert H.

    1993-01-01

    The conflict-resolution technique of interpersonal negotiation involves five steps: (1) state your positive intentions; (2) define, analyze, and discuss the problem; (3) summarize progress; (4) explore alternative solutions; and (5) set a time for follow-up. (MLF)

  6. Mobile Monitoring and Maintenance of Power Systems Bing JIANG and Alexander V. MAMISHEV

    E-print Network

    Mamishev, Alexander

    workers for dangerous and highly specialized operations, such as live maintenance of high voltage of the world put forward formidable challenges that need to be overcome for successful operation of power- teristics or propagating waves, but this approach does not match the resolution of equivalent sensors placed

  7. High-resolution finite volume methods

    E-print Network

    Frolkovic, Peter

    -resolution finite volume methods preserving physical properties, ... robust for rough data, ... (1st order scheme limiting to the 1st order scheme if necessary ("limiters") R. LeVeque: Finite Volume Methods for HyperbolicHigh-resolution finite volume methods for problems of reactive transport in porous media Peter

  8. 43 CFR 3830.20 - Payment of service charges, location fees, initial maintenance fees, annual maintenance fees and...

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ...location fees, initial maintenance fees, annual maintenance fees and oil shale fees. 3830.20 Section 3830.20 Public Lands: Interior...fees, initial maintenance fees, annual maintenance fees and oil shale...

  9. 43 CFR 3830.20 - Payment of service charges, location fees, initial maintenance fees, annual maintenance fees and...

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ...location fees, initial maintenance fees, annual maintenance fees and oil shale fees. 3830.20 Section 3830.20 Public Lands: Interior...fees, initial maintenance fees, annual maintenance fees and oil shale...

  10. 43 CFR 3830.20 - Payment of service charges, location fees, initial maintenance fees, annual maintenance fees and...

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ...location fees, initial maintenance fees, annual maintenance fees and oil shale fees. 3830.20 Section 3830.20 Public Lands: Interior...fees, initial maintenance fees, annual maintenance fees and oil shale...

  11. 43 CFR 3830.20 - Payment of service charges, location fees, initial maintenance fees, annual maintenance fees and...

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ...location fees, initial maintenance fees, annual maintenance fees and oil shale fees. 3830.20 Section 3830.20 Public Lands: Interior...fees, initial maintenance fees, annual maintenance fees and oil shale...

  12. 14 CFR 43.5 - Approval for return to service after maintenance, preventive maintenance, rebuilding, or alteration.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION AIRCRAFT MAINTENANCE, PREVENTIVE MAINTENANCE..., rebuilding, or alteration. No person may approve for return to service any aircraft, airframe, aircraft engine, propeller, or appliance, that has undergone maintenance, preventive maintenance, rebuilding,...

  13. 14 CFR 43.5 - Approval for return to service after maintenance, preventive maintenance, rebuilding, or alteration.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION AIRCRAFT MAINTENANCE, PREVENTIVE MAINTENANCE..., rebuilding, or alteration. No person may approve for return to service any aircraft, airframe, aircraft engine, propeller, or appliance, that has undergone maintenance, preventive maintenance, rebuilding,...

  14. 14 CFR 43.5 - Approval for return to service after maintenance, preventive maintenance, rebuilding, or alteration.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION AIRCRAFT MAINTENANCE, PREVENTIVE MAINTENANCE..., rebuilding, or alteration. No person may approve for return to service any aircraft, airframe, aircraft engine, propeller, or appliance, that has undergone maintenance, preventive maintenance, rebuilding,...

  15. 14 CFR 43.5 - Approval for return to service after maintenance, preventive maintenance, rebuilding, or alteration.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION AIRCRAFT MAINTENANCE, PREVENTIVE MAINTENANCE..., rebuilding, or alteration. No person may approve for return to service any aircraft, airframe, aircraft engine, propeller, or appliance, that has undergone maintenance, preventive maintenance, rebuilding,...

  16. 14 CFR 43.5 - Approval for return to service after maintenance, preventive maintenance, rebuilding, or alteration.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION AIRCRAFT MAINTENANCE, PREVENTIVE MAINTENANCE..., rebuilding, or alteration. No person may approve for return to service any aircraft, airframe, aircraft engine, propeller, or appliance, that has undergone maintenance, preventive maintenance, rebuilding,...

  17. The impact of maintenance and design for ventilation systems.

    PubMed

    Estill, Cheryl Fairfield; Watkins, Daniel S; Hall, Ronald M; O'Brien, Dennis M; Shulman, Stanley A

    2002-05-01

    Ventilation systems need to be designed to include access for cleaning and preventive maintenance. Without such access, the exhaust volume will deteriorate. Because of access difficulties and the many demands on their time, plant managers are sometimes errant in performing proper preventive maintenance. Three surveys measuring workers' exposures to methylene chloride were conducted at the same furniture stripping facility. A new ventilation system was installed for the first survey, resulting in an exhaust volume of 2900 cfm and worker exposure to methylene chloride of 59 ppm (geometric mean). Immediately after the first survey, the gasoline-powered fan was replaced by a smaller capacity electrically powered fan. Deterioration in the ventilation system was seen after seven years. Problems included clogged slots, paint chips and sawdust deposits in plenums, and a loose and frayed fan belt. The second survey indicated a reduction in exhaust volume to 1060 cfm and increased worker exposure to 330 ppm. With the smaller capacity fan still in place, the system was otherwise upgraded to allow for easier access and maintenance was performed. The third survey showed that the ventilation system performance was better (exhaust volume improved to 2080 cfm) and the worker exposures were reduced to 73 ppm. This study shows the benefits of designing for preventive maintenance and the necessity of keeping the ventilation systems clean. PMID:12018398

  18. Scheduling jobs and a variable maintenance on a single machine with common due-date assignment.

    PubMed

    Wan, Long

    2014-01-01

    We investigate a common due-date assignment scheduling problem with a variable maintenance on a single machine. The goal is to minimize the total earliness, tardiness, and due-date cost. We derive some properties on an optimal solution for our problem. For a special case with identical jobs we propose an optimal polynomial time algorithm followed by a numerical example. PMID:25147861

  19. Optimizing with constraints: a case study in scheduling maintenance of electric power units

    E-print Network

    Dechter, Rina

    Optimizing with constraints: a case study in scheduling maintenance of electric power units Daniel 92717-3425 ffrost, dechterg@ics.uci.edu Abstract A well-studied problem in the electric power industry benchmark. 1 Introduction This paper focuses on a well-studied problem of the electric power industry

  20. Haul road maintenance: Coherent strategies

    SciTech Connect

    Walker, S. )

    1993-12-01

    This paper describes the economic and technical advantages for maintaining and designing good haulage systems at mining sites. It describes the need for good road-surfacing material to reduce wear-and-tear on other equipment. It also discusses good housekeeping practices such as maintaining proper cross grades, drainage ditch control, and cleaning up after spills. Such maintenance procedures are hard work initially but repay dividends through reduced tire and track wear costs, lower fuel bills, reduced operator stress, and reduced potential for accidents.

  1. Methodology for minimizing maintenance costs

    SciTech Connect

    Brice, L.; Connell, J.

    1983-01-01

    Research conducted in the case study of a large applications system shows that the two primary causes of high maintenance costs are: the frequency of user-requested changes to software; and the psychological complexity of the software. A tool kit is suggested which, when applied to the design of new systems or rewrites, will produce systems which users are less likely to need changed, and will contribute to the reduction of psychological complexity of code, making it easier to change when necessary. The tool kit is easy to use, can be applied to large or small systems in any language on any equipment, and requires no purchase of hardware or software.

  2. A Minimum Delta V Orbit Maintenance Strategy for Low-Altitude Missions Using Burn Parameter Optimization

    NASA Technical Reports Server (NTRS)

    Brown, Aaron J.

    2011-01-01

    Orbit maintenance is the series of burns performed during a mission to ensure the orbit satisfies mission constraints. Low-altitude missions often require non-trivial orbit maintenance Delta V due to sizable orbital perturbations and minimum altitude thresholds. A strategy is presented for minimizing this Delta V using impulsive burn parameter optimization. An initial estimate for the burn parameters is generated by considering a feasible solution to the orbit maintenance problem. An low-lunar orbit example demonstrates the Delta V savings from the feasible solution to the optimal solution. The strategy s extensibility to more complex missions is discussed, as well as the limitations of its use.

  3. Initial flight qualification and operational maintenance of X-29A flight software

    NASA Technical Reports Server (NTRS)

    Earls, Michael R.; Sitz, Joel R.

    1989-01-01

    A discussion is presented of some significant aspects of the initial flight qualification and operational maintenance of the flight control system softward for the X-29A technology demonstrator. Flight qualification and maintenance of complex, embedded flight control system software poses unique problems. The X-29A technology demonstrator aircraft has a digital flight control system which incorporates functions generally considered too complex for analog systems. Organizational responsibilities, software assurance issues, tools, and facilities are discussed.

  4. 222-S Laboratory maintenance implementation plan

    SciTech Connect

    Heinemann, J.L.

    1997-08-13

    This Maintenance Improvement Plan has been developed for maintenance functions associated with the 222-S Laboratory. This plan is developed from the guidelines presented by Department of Energy (DOE) Order 4330.4B, Maintenance Management Program (DOE 1994), Chapter 11. The objective of this plan is to provide information for establishing and identifying WMH conformance programs and policies applicable to implementation of DOE Order 4330.4B guidelines. In addition, this maintenance plan identifies the actions necessary to develop a cost effective and efficient maintenance program at 222-S Laboratory. Maintenance activities are mainly going to be performed by existing maintenance organizations within Waste Management Federal Services of Hanford (WMH). Most maintenance performed at 222-S Laboratory is performed by the 222-S Laboratory maintenance organization. This 222-S Laboratory Maintenance Implementation Plan provides the interface requirements and responsibilities as they apply specifically to 222-S Laboratory. This document provides an implementation schedule which has been developed for items considered to be deficient or in need of improvement. The discussion section as applied to 222-S Laboratory implementation has been developed from a review of programs and practices utilizing the graded approach. Biennial review and additional reviews are conducted as significant programmatic and mission changes are made. This document is revised as necessary to keep this document current and in compliance with DOE requirements.

  5. Mitochondrial DNA maintenance: an appraisal.

    PubMed

    Akhmedov, Alexander T; Marín-García, José

    2015-11-01

    Mitochondria play a crucial role in a variety of cellular processes ranging from energy metabolism, generation of reactive oxygen species (ROS), and Ca(2+) handling to stress responses, cell survival, and death. Malfunction of the organelle may contribute to the pathogenesis of neuromuscular disorders, cancer, premature aging, and cardiovascular diseases, including myocardial ischemia, cardiomyopathy, and heart failure. Mitochondria are unique as they contain their own genome organized into DNA-protein complexes, so-called mitochondrial nucleoids, along with multiprotein machineries, which promote mitochondrial DNA (mtDNA) replication, transcription, and repair. Although the organelle possesses almost all known nuclear DNA repair pathways, including base excision repair, mismatch repair, and recombinational repair, the proximity of mtDNA to the main sites of ROS production and the lack of protective histones may result in increased susceptibility to oxidative stress and other types of mtDNA damage. Defects in the components of these highly organized machineries, which mediate mtDNA maintenance (replication and repair), may result in accumulation of point mutations and/or deletions in mtDNA and decreased mtDNA copy number impairing mitochondrial function. This review will focus on the mechanisms of mtDNA maintenance with emphasis on the proteins implicated in these processes and their functional role in various disease conditions and aging. PMID:26286847

  6. No maintenance -- no energy efficiency

    SciTech Connect

    Szydlowski, R.F.; Schliesing, J.S.; Winiarski, D.W.

    1994-12-01

    Field investigations illustrate that it is not realistic to expect new high-tech equipment to function for a full life expectancy at high efficiency without significant operations and maintenance (O&M). A simple walk through inspection of most buildings reveals extensive equipment that is being operated on manual override, is incorrectly adjusted and operating inefficiently, or is simply inoperative. This point is illustrated with two examples at Robins Air Force Base, Georgia. The first describes development of a comprehensive, base-wide, steam trap maintenance program. The second describes a measured evaluation from a typical office building. The objective of both examples was to assess the importance of proper O&M. The proposed ``O&M First`` philosophy will result in more efficient building HVAC operation, provide improved services to the building occupants, and reduce energy consumption and unscheduled equipment repair/replacement. Implementation of a comprehensive O&M program will result in a 15--25% energy savings. The O&M foundation that is established will allow other energy conservation activities such is demand side management or energy management and control systems, to achieve and maintain their expected energy savings.

  7. Second Line of Defense: Electronic Maintenance Reports, Local Maintenance Provider User Guide, Rev. 3

    SciTech Connect

    Leigh, Richard J.

    2012-09-01

    The Electronic Maintenance Report forms allow Local Maintenance Providers (LMP) and other program staff to enter maintenance information into a simple and secure system. This document describes the features and information required to complete the Maintenance Report forms. It is expected that all Corrective Maintenance Reports from LMPs will be submitted electronically into the SLD Portal. As an exception (e.g., when access to the SLD Portal is unavailable), Maintenance Reports can be submitted via a secure Adobe PDF form available through the Sustainability Manager assigned to each country.

  8. Lexical ambiguity resolution

    SciTech Connect

    Small, S.; Cottrell, G.; Tanenhaus, M.

    1987-01-01

    This book collects much of the best research currently available on the problem of lexical ambiguity resolution in the processing of human language. When taken out of context, sentences are usually ambiguous. When actually uttered in a dialogue or written in text, these same sentences often have unique interpretations. The inherent ambiguity of isolated sentences, becomes obvious in the attempt to write a computer program to understand them. Different views have emerged on the nature of context and the mechanisms by which it directs unambiguous understanding of words and sentences. These perspectives are represented and discussed. Eighteen original papers from a valuable source book for cognitive scientists in AI, psycholinguistics, neuropsychology, or theoretical linguistics.

  9. Maintenance management at La Silla Paranal Observatory

    NASA Astrophysics Data System (ADS)

    Montano, Nelson

    2008-07-01

    From the beginning of the VLT project, the European Southern Observatory (ESO) considered the application of a competent maintenance strategy a fundamental aspect for future operations of the Paranal Observatory. For that purpose, a special maintenance philosophy was developed during the project stage and applied during the initial years of operations. The merging of the La Silla and Paranal Observatories in 2005 added a new managerial challenge to the regular operational requirements (high availability and reliability) which motivated ESO Management to develop a stronger strategy for the operations of the new merged Observatory. Part of the new strategy considered the creation of a dedicated department for the management of all maintenance activities, separating this support from the traditional scheme where the Engineering Department had the responsibility for the entire technical support to operations. In order to keep a competent level of maintenance operations for the new unified Observatory, the La Silla Paranal (LSP) Maintenance Department has been using a well known maintenance management model used in various industrial applications as a guide. Today the operations of the Maintenance Department are concentrated on developing and implementing practices regarding concepts such as Maintenance Tactics, Planning, Data Management, Performance Indicators and Material Management. In addition to that, advances related to Reliability Analysis been taken in order to reach a superior level of excellence. The results achieved by the LSP Maintenance Department are reflected in a reduced rate of functional failures, allowing uninterrupted operations of the Observation sites.

  10. KINOFORM LENSES - TOWARD NANOMETER RESOLUTION.

    SciTech Connect

    STEIN, A.; EVANS-LUTTERODT, K.; TAYLOR, A.

    2004-10-23

    While hard x-rays have wavelengths in the nanometer and sub-nanometer range, the ability to focus them is limited by the quality of sources and optics, and not by the wavelength. A few options, including reflective (mirrors), diffractive (zone plates) and refractive (CRL's) are available, each with their own limitations. Here we present our work with kinoform lenses which are refractive lenses with all material causing redundant 2{pi} phase shifts removed to reduce the absorption problems inherently limiting the resolution of refractive lenses. By stacking kinoform lenses together, the effective numerical aperture, and thus the focusing resolution, can be increased. The present status of kinoform lens fabrication and testing at Brookhaven is presented as well as future plans toward achieving nanometer resolution.

  11. Longview District Operations and Maintenance Headquarters: Environmental assessment

    SciTech Connect

    Not Available

    1992-03-01

    Bonneville Power Administration (BPA) operations and maintenance staff are presently based at a headquarters next to the Longview Substation. These headquarters buildings, however, were built in 1941 and have deteriorated to the point of needing extensive repair. They also lack sufficient inside storage space. New buildings cannot be constructed on the site because of surrounding development. In addition, the site is within an area exposed to industrial fallout (coal tar pitch and metallic particles) that may be damaging buildings, equipment, and vehicles. BPA is concerned about the potential health risk to headquarters staff from the fallout. In light of these problems, BPA proposes to construct a new operations and maintenance headquarters at a different location, and to demolish the existing headquarters. This paper discusses the environmental impacts of the proposed action and alternatives.

  12. Longview District Operations and Maintenance Headquarters : Environmental Assessment.

    SciTech Connect

    United States. Bonneville Power Administration.

    1992-03-01

    Bonneville Power Administration (BPA) operations and maintenance staff are presently based at a headquarters next to the Longview Substation. These headquarters buildings, however, were built in 1941 and have deteriorated to the point of needing extensive repair. They also lack sufficient inside storage space. New buildings cannot be constructed on the site because of surrounding development. In addition, the site is within an area exposed to industrial fallout (coal tar pitch and metallic particles) that may be damaging buildings, equipment, and vehicles. BPA is concerned about the potential health risk to headquarters staff from the fallout. In light of these problems, BPA proposes to construct a new operations and maintenance headquarters at a different location, and to demolish the existing headquarters. This paper discusses the environmental impacts of the proposed action and alternatives.

  13. 75 FR 4099 - Maintenance Wage Rate Wage Recommendation and Maintenance Wage Survey; Report of Additional...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-01-26

    ... adopt prevailing wage rates for maintenance laborers and mechanics, and to approve or refer to the U.S... maintenance laborers and mechanics, and to approve or refer to the U.S. Department of Labor for approval,...

  14. 14 CFR 43.3 - Persons authorized to perform maintenance, preventive maintenance, rebuilding, and alterations.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... aircraft, airframe, aircraft engine, propeller, appliance, or component part to which this part applies.... (j) A manufacturer may— (1) Rebuild or alter any aircraft, aircraft engine, propeller, or appliance... ADMINISTRATION, DEPARTMENT OF TRANSPORTATION AIRCRAFT MAINTENANCE, PREVENTIVE MAINTENANCE, REBUILDING,...

  15. 14 CFR 43.3 - Persons authorized to perform maintenance, preventive maintenance, rebuilding, and alterations.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... aircraft, airframe, aircraft engine, propeller, appliance, or component part to which this part applies.... (j) A manufacturer may— (1) Rebuild or alter any aircraft, aircraft engine, propeller, or appliance... ADMINISTRATION, DEPARTMENT OF TRANSPORTATION AIRCRAFT MAINTENANCE, PREVENTIVE MAINTENANCE, REBUILDING,...

  16. Teamwork & Teamplay: A Guide to Cooperative, Challenge and Adventure Activities That Build Confidence, Cooperation, Teamwork, Creativity, Trust, Decision Making, Conflict Resolution, Resource Management, Communication, Effective Feedback and Problem Solving Skills.

    ERIC Educational Resources Information Center

    Cain, Jim; Jolliff, Barry

    Challenge and adventure programs create situations that challenge the abilities of individuals and groups and that are metaphors for the problems and challenges of daily life. This book describes dozens of group activities that foster individual and group skills such as cooperation, problem solving, and communication. Each activity has a…

  17. Simulated maintenance a virtual reality

    SciTech Connect

    Lirvall, P.

    1995-10-01

    The article describes potential applications of personal computer-based virtual reality software. The applications are being investigated by Atomic Energy of Canada Limited`s (AECL) Chalk River Laboratories for the Canadian deuterium-uranium (Candu) reactor. Objectives include: (1) reduction of outage duration and improved safety, (2) cost-effective and safe maintenance of equipment, (3) reduction of exposure times and identification of overexposure situations, (4) cost-effective training in a virtual control room simulator, (5) human factors evaluation of design interface, and (6) visualization of conceptual and detailed designs of critical nuclear field environments. A demonstration model of a typical reactor control room, the use of virtual reality in outage planning, and safety issues are outlined.

  18. Autonomous spacecraft maintenance study group

    NASA Technical Reports Server (NTRS)

    Marshall, M. H.; Low, G. D.

    1981-01-01

    A plan to incorporate autonomous spacecraft maintenance (ASM) capabilities into Air Force spacecraft by 1989 is outlined. It includes the successful operation of the spacecraft without ground operator intervention for extended periods of time. Mechanisms, along with a fault tolerant data processing system (including a nonvolatile backup memory) and an autonomous navigation capability, are needed to replace the routine servicing that is presently performed by the ground system. The state of the art fault handling capabilities of various spacecraft and computers are described, and a set conceptual design requirements needed to achieve ASM is established. Implementations for near term technology development needed for an ASM proof of concept demonstration by 1985, and a research agenda addressing long range academic research for an advanced ASM system for 1990s are established.

  19. Laboratory maintenance of Neisseria gonorrhoeae.

    PubMed

    Spence, Janice M; Wright, Lori; Clark, Virginia L

    2008-02-01

    Neisseria gonorrhoeae is a human pathogen of mucosal surfaces, thus laboratory manipulations must include appropriate safety measures. The growth requirements and behavior of the gonococcus are significantly different from many bacteria, necessitating modifications of common laboratory techniques. A fastidious organism, N. gonorrhoeae requires enriched media in a CO2 atmosphere at 35 degrees to 37 degrees C for growth. In addition, N. gonorrhoeae expresses potent autolysins whose activity increases following glucose depletion during stationary phase, leading to cell death. Long believed to be an obligate aerobe, the gonococcus is capable of anaerobic growth when provided with a suitable electron acceptor. This unit provides information for both aerobic and anaerobic growth, basic long-term and daily maintenance of gonococcal cultures, as well as safety considerations for laboratory studies. PMID:18770539

  20. Latent tree structure learning for cross-document coreference resolution

    E-print Network

    Shyu, Eric

    2014-01-01

    Cross Document Coreference Resolution (CDCR) is the problem of learning which mentions, coming from several different documents, correspond to the same entity. This thesis approaches the CDCR problem by first turning it ...

  1. 47 CFR 80.1074 - Radio maintenance personnel for at-sea maintenance.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ...2012-10-01 2012-10-01 false Radio maintenance personnel for at-sea maintenance...COMMISSION (CONTINUED) SAFETY AND SPECIAL RADIO SERVICES STATIONS IN THE MARITIME SERVICES... General Provisions § 80.1074 Radio maintenance personnel for at-sea...

  2. 47 CFR 80.1074 - Radio maintenance personnel for at-sea maintenance.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ...2013-10-01 2013-10-01 false Radio maintenance personnel for at-sea maintenance...COMMISSION (CONTINUED) SAFETY AND SPECIAL RADIO SERVICES STATIONS IN THE MARITIME SERVICES... General Provisions § 80.1074 Radio maintenance personnel for at-sea...

  3. 47 CFR 80.1074 - Radio maintenance personnel for at-sea maintenance.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ...2014-10-01 2014-10-01 false Radio maintenance personnel for at-sea maintenance...COMMISSION (CONTINUED) SAFETY AND SPECIAL RADIO SERVICES STATIONS IN THE MARITIME SERVICES... General Provisions § 80.1074 Radio maintenance personnel for at-sea...

  4. 47 CFR 80.1074 - Radio maintenance personnel for at-sea maintenance.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ...2010-10-01 2010-10-01 false Radio maintenance personnel for at-sea maintenance...COMMISSION (CONTINUED) SAFETY AND SPECIAL RADIO SERVICES STATIONS IN THE MARITIME SERVICES... General Provisions § 80.1074 Radio maintenance personnel for at-sea...

  5. 47 CFR 80.1074 - Radio maintenance personnel for at-sea maintenance.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ...2011-10-01 2011-10-01 false Radio maintenance personnel for at-sea maintenance...COMMISSION (CONTINUED) SAFETY AND SPECIAL RADIO SERVICES STATIONS IN THE MARITIME SERVICES... General Provisions § 80.1074 Radio maintenance personnel for at-sea...

  6. 14 CFR 121.365 - Maintenance, preventive maintenance, and alteration organization.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 14 Aeronautics and Space 3 2010-01-01 2010-01-01 false Maintenance, preventive maintenance, and alteration organization. 121.365 Section 121.365 Aeronautics and Space FEDERAL AVIATION ADMINISTRATION... organization. (a) Each certificate holder that performs any of its maintenance (other than required...

  7. 14 CFR 125.245 - Organization required to perform maintenance, preventive maintenance, and alteration.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 14 Aeronautics and Space 3 2010-01-01 2010-01-01 false Organization required to perform maintenance, preventive maintenance, and alteration. 125.245 Section 125.245 Aeronautics and Space FEDERAL... GOVERNING PERSONS ON BOARD SUCH AIRCRAFT Maintenance § 125.245 Organization required to perform...

  8. 14 CFR 135.423 - Maintenance, preventive maintenance, and alteration organization.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 14 Aeronautics and Space 3 2010-01-01 2010-01-01 false Maintenance, preventive maintenance, and alteration organization. 135.423 Section 135.423 Aeronautics and Space FEDERAL AVIATION ADMINISTRATION..., preventive maintenance, and alteration organization. (a) Each certificate holder that performs any of...

  9. Grounds Maintenance Equipment and Procedures. Building Maintenance. Module VI. Instructor's Guide.

    ERIC Educational Resources Information Center

    Crank, Virgil

    This curriculum guide, one of six modules keyed to the building maintenance competency profile developed by industry and education professionals, provides materials for two units on grounds maintenance equipment and procedures. The first unit deals with grounds maintenance equipment and includes the following lessons: safety; changing oil/filter…

  10. 47 CFR 80.1074 - Radio maintenance personnel for at-sea maintenance.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 47 Telecommunication 5 2013-10-01 2013-10-01 false Radio maintenance personnel for at-sea... AND SPECIAL RADIO SERVICES STATIONS IN THE MARITIME SERVICES Global Maritime Distress and Safety System (GMDSS) General Provisions § 80.1074 Radio maintenance personnel for at-sea maintenance. (a)...

  11. 47 CFR 80.1074 - Radio maintenance personnel for at-sea maintenance.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 47 Telecommunication 5 2014-10-01 2014-10-01 false Radio maintenance personnel for at-sea... AND SPECIAL RADIO SERVICES STATIONS IN THE MARITIME SERVICES Global Maritime Distress and Safety System (GMDSS) General Provisions § 80.1074 Radio maintenance personnel for at-sea maintenance. (a)...

  12. 47 CFR 80.1074 - Radio maintenance personnel for at-sea maintenance.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 47 Telecommunication 5 2012-10-01 2012-10-01 false Radio maintenance personnel for at-sea... AND SPECIAL RADIO SERVICES STATIONS IN THE MARITIME SERVICES Global Maritime Distress and Safety System (GMDSS) General Provisions § 80.1074 Radio maintenance personnel for at-sea maintenance. (a)...

  13. Relationship Maintenance on Facebook: Development of a Measure, Relationship to General Maintenance, and Relationship Satisfaction

    ERIC Educational Resources Information Center

    Dainton, Marianne

    2013-01-01

    Previous research indicates that the primary reason college students use Facebook is for relationship maintenance. The present study sought to determine the relationship between Facebook maintenance and general maintenance efforts in college student romantic relationships, as well as the impacts of such behaviors on the relationship. Survey data…

  14. Modelling epigenetic information maintenance a Kappa tutorial

    E-print Network

    Danos, Vincent - Laboratoire Preuves, Programmes et Systèmes, Université Paris 7

    Modelling epigenetic information maintenance a Kappa tutorial Jean Krivine1 , Vincent Danos2, that of the maintenance of epigenetic information. Our plan is to: - propose in biological and informal terms a repair Epigenetic repair Epigenetic information is encoded in the human genome via a chemical modification of C

  15. 47 CFR 80.96 - Maintenance tests.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 47 Telecommunication 5 2012-10-01 2012-10-01 false Maintenance tests. 80.96 Section 80.96... tests. Stations are authorized to engage in test transmissions necessary for maintenance of the station. Test transmissions must conform to appropriate test operating procedures....

  16. The Cognitive Behavioral Approach to Weight Maintenance.

    ERIC Educational Resources Information Center

    Girdano, Dorothy Dusek

    The cognitive behavioral approach to weight maintenance assumes that obese people should be concerned with weight control rather than weight loss, and it embraces both the behavioral approach and a maintenance program which examines risks, value priorities, and the basic principles of weight loss/weight gain. The University of Maryland offers a…

  17. 30 CFR 57.5066 - Maintenance standards.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... 30 Mineral Resources 1 2012-07-01 2012-07-01 false Maintenance standards. 57.5066 Section 57.5066... SAFETY AND HEALTH SAFETY AND HEALTH STANDARDS-UNDERGROUND METAL AND NONMETAL MINES Air Quality, Radiation... Maintenance standards. (a) Any diesel powered equipment operated at any time in underground areas must...

  18. 47 CFR 101.1109 - Records maintenance.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 47 Telecommunication 5 2013-10-01 2013-10-01 false Records maintenance. 101.1109 Section 101.1109 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) SAFETY AND SPECIAL RADIO SERVICES FIXED MICROWAVE SERVICES Competitive Bidding Procedures for LMDS § 101.1109 Records maintenance. All winning...

  19. 47 CFR 101.1109 - Records maintenance.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 47 Telecommunication 5 2010-10-01 2010-10-01 false Records maintenance. 101.1109 Section 101.1109 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) SAFETY AND SPECIAL RADIO SERVICES FIXED MICROWAVE SERVICES Competitive Bidding Procedures for LMDS § 101.1109 Records maintenance. All winning...

  20. 47 CFR 101.1109 - Records maintenance.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 47 Telecommunication 5 2012-10-01 2012-10-01 false Records maintenance. 101.1109 Section 101.1109 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) SAFETY AND SPECIAL RADIO SERVICES FIXED MICROWAVE SERVICES Competitive Bidding Procedures for LMDS § 101.1109 Records maintenance. All winning...

  1. 47 CFR 101.1109 - Records maintenance.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 47 Telecommunication 5 2011-10-01 2011-10-01 false Records maintenance. 101.1109 Section 101.1109 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) SAFETY AND SPECIAL RADIO SERVICES FIXED MICROWAVE SERVICES Competitive Bidding Procedures for LMDS § 101.1109 Records maintenance. All winning...

  2. 49 CFR 37.203 - Lift maintenance.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 49 Transportation 1 2011-10-01 2011-10-01 false Lift maintenance. 37.203 Section 37.203 Transportation Office of the Secretary of Transportation TRANSPORTATION SERVICES FOR INDIVIDUALS WITH DISABILITIES (ADA) Over-the-Road Buses (OTRBs) § 37.203 Lift maintenance. (a) The entity shall establish...

  3. 49 CFR 37.203 - Lift maintenance.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 49 Transportation 1 2010-10-01 2010-10-01 false Lift maintenance. 37.203 Section 37.203 Transportation Office of the Secretary of Transportation TRANSPORTATION SERVICES FOR INDIVIDUALS WITH DISABILITIES (ADA) Over-the-Road Buses (OTRBs) § 37.203 Lift maintenance. (a) The entity shall establish...

  4. 14 CFR 91.1111 - Maintenance training.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... 14 Aeronautics and Space 2 2011-01-01 2011-01-01 false Maintenance training. 91.1111 Section 91... Operations Program Management § 91.1111 Maintenance training. The program manager must ensure that all... annual recurrent training and are competent to perform those duties....

  5. 14 CFR 91.1111 - Maintenance training.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 14 Aeronautics and Space 2 2010-01-01 2010-01-01 false Maintenance training. 91.1111 Section 91... Operations Program Management § 91.1111 Maintenance training. The program manager must ensure that all... annual recurrent training and are competent to perform those duties....

  6. 14 CFR 91.1111 - Maintenance training.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... 14 Aeronautics and Space 2 2014-01-01 2014-01-01 false Maintenance training. 91.1111 Section 91... Operations Program Management § 91.1111 Maintenance training. The program manager must ensure that all... annual recurrent training and are competent to perform those duties....

  7. 14 CFR 91.1111 - Maintenance training.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... 14 Aeronautics and Space 2 2013-01-01 2013-01-01 false Maintenance training. 91.1111 Section 91... Operations Program Management § 91.1111 Maintenance training. The program manager must ensure that all... annual recurrent training and are competent to perform those duties....

  8. 14 CFR 91.1111 - Maintenance training.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... 14 Aeronautics and Space 2 2012-01-01 2012-01-01 false Maintenance training. 91.1111 Section 91... Operations Program Management § 91.1111 Maintenance training. The program manager must ensure that all... annual recurrent training and are competent to perform those duties....

  9. Health And Safety In Maintenance Activities

    NASA Astrophysics Data System (ADS)

    Ungureanu, Nicolae Stelian; Daraba, Dinu; Moraru, Roland Iosif

    2015-07-01

    The paper examines some aspects of health and safety at work in maintenance activities. It was analysed the occurrence of accidents, statistically, in maintenance work. There have been identified a number of causes of accidents and there have been proposed some measures to reduce them.

  10. The Chemistry of Swimming Pool Maintenance

    ERIC Educational Resources Information Center

    Salter, Carl; Langhus, David L.

    2007-01-01

    The study of chemistry involved in the maintenance of a swimming pool provides a lot of chemical education to the students, including the demonstration of the importance of pH in water chemistry. The various chemical aspects hidden in the maintenance of the pool are being described.

  11. School Bus Maintenance. Bulletin, 1948, No. 2

    ERIC Educational Resources Information Center

    Featherston, E. Glenn

    1948-01-01

    This bulletin is one in the series on pupil transportation issued by the Office of Education. Its purpose is to furnish information and guidance for local school administrators and others who are concerned with school bus maintenance. Programs of school bus maintenance vary among the 48 States. Presumably all contract vehicles are maintained by…

  12. Test, Control and Monitor System maintenance plan

    NASA Technical Reports Server (NTRS)

    Buehler, David P.; Lougheed, M. J.

    1993-01-01

    The maintenance requirements for Test, Control, and Monitor System (TCMS) and the method for satisfying these requirements prior to First Need Date (FND) of the last TCMS set are described. The method for satisfying maintenance requirements following FND of the last TCMS set will be addressed by a revision to this plan. This maintenance plan serves as the basic planning document for maintenance of this equipment by the NASA Payloads Directorate (CM) and the Payload Ground Operations Contractor (PGOC) at KSC. The terms TCMS Operations and Maintenance (O&M), Payloads Logistics, TCMS Sustaining Engineering, Payload Communications, and Integrated Network Services refer to the appropriate NASA and PGOC organization. For the duration of their contract, the Core Electronic Contractor (CEC) will provide a Set Support Team (SST). One of the primary purposes of this team is to help NASA and PGOC operate and maintain TCMS. It is assumed that SST is an integral part of TCMS O&M. The purpose of this plan is to describe the maintenance concept for TCMS hardware and system software in order to facilitate activation, transition planning, and continuing operation. When software maintenance is mentioned in this plan, it refers to maintenance of TCMS system software.

  13. 40 CFR 68.56 - Maintenance.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... 40 Protection of Environment 16 2012-07-01 2012-07-01 false Maintenance. 68.56 Section 68.56 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR PROGRAMS (CONTINUED) CHEMICAL ACCIDENT PREVENTION PROVISIONS Program 2 Prevention Program § 68.56 Maintenance. (a) The owner or operator shall prepare and implement procedures...

  14. Bibliographic Record Maintenance in the Online Environment.

    ERIC Educational Resources Information Center

    Hudson, Judith

    1984-01-01

    This paper describes methods used for maintenance of bibliographic records in online catalogs and compares them with maintenance in the conventional card catalog: addition of bibliographic records, identification and correction of errors, application of authority control, addition of information to records, and withdrawal of records from catalog.…

  15. Building a maintenance policy through a multi-criterion decision-making model

    NASA Astrophysics Data System (ADS)

    Faghihinia, Elahe; Mollaverdi, Naser

    2012-08-01

    A major competitive advantage of production and service systems is establishing a proper maintenance policy. Therefore, maintenance managers should make maintenance decisions that best fit their systems. Multi-criterion decision-making methods can take into account a number of aspects associated with the competitiveness factors of a system. This paper presents a multi-criterion decision-aided maintenance model with three criteria that have more influence on decision making: reliability, maintenance cost, and maintenance downtime. The Bayesian approach has been applied to confront maintenance failure data shortage. Therefore, the model seeks to make the best compromise between these three criteria and establish replacement intervals using Preference Ranking Organization Method for Enrichment Evaluation (PROMETHEE II), integrating the Bayesian approach with regard to the preference of the decision maker to the problem. Finally, using a numerical application, the model has been illustrated, and for a visual realization and an illustrative sensitivity analysis, PROMETHEE GAIA (the visual interactive module) has been used. Use of PROMETHEE II and PROMETHEE GAIA has been made with Decision Lab software. A sensitivity analysis has been made to verify the robustness of certain parameters of the model.

  16. CleanFleet. Final report: Volume 3, vehicle maintenance and durability

    SciTech Connect

    1995-12-01

    CleanFleet is a demonstration of panel vans operating on five alternative motorfuels in commercial package delivery operations in the South Coast Air Basin of California. The five alternative fuels are propane gas, compressed natural gas (CNG), California Phase 2 reformulated gasoline (RFG), methanol (M-85 with 15 percent RFG), and electricity. Data were gathered on in-use emissions, operations, and fleet economics. This volume of the final report summarizes the maintenance required on these vans from the time they were introduced into the demonstration (April through early November 1992) until the end of the demonstration in September 1994. The vans were used successfully in FedEx operations; but, to varying degrees, the alternative fuel vehicles required more maintenance than the unleaded gasoline control vehicles. The maintenance required was generally associated with the development state of the fuel-related systems. During the demonstration, no non-preventive maintenance was required on the highly developed fuel-related systems in any of the unleaded gasoline production vehicles used either as controls or as RFG test vehicles. The maintenance problems encountered with the less developed systems used in this demonstration may persist in the short term with vehicles featuring the same or similar systems. This means that fleet operators planning near-term acquisitions of vehicles incorporating such systems should consider the potential for similar problems when (1) selecting vendors and warranty provisions and (2) planning maintenance programs.

  17. Super-Resolution Through Neighbor Embedding Hong Chang, Dit-Yan Yeung, Yimin Xiong

    E-print Network

    Yeung, Dit-Yan

    -image super-resolution problems. Given a low-resolution image as input, we recover its high- resolution locally linear embedding (LLE). Specifically, small image patches in the low- and high-resolution images in the feature space. Besides using the training image pairs to estimate the high-resolution embedding, we also

  18. Geostatistical inverse modeling for super-resolution mapping of continuous spatial processes

    E-print Network

    Brown, Daniel G.

    : Multi-resolution data fusion Super-resolution mapping Change-of-support Spatial nonstationarity-resolution images with variable resolutions and for super- resolution (i.e., predictions at the sub-pixel level associated with the change-of-support problem. We used GIM to produce both spatial predictions of a target

  19. Balance Problems

    MedlinePLUS

    ... often, it could be a sign of a balance problem. Balance problems can make you feel unsteady or as ... fall-related injuries, such as hip fracture. Some balance problems are due to problems in the inner ...

  20. Psychoneuroendocrine effects of methadone maintenance.

    PubMed

    Willenbring, M L; Morley, J E; Krahn, D D; Carlson, G A; Levine, A S; Shafer, R B

    1989-01-01

    A variety of neuroendocrine and psychiatric dysfunctions have been demonstrated in humans maintained on opiates, but both have not previously been examined in the same population. We performed a series of neuroendocrine challenge tests in men participating in a methadone maintenance clinic and in normal controls. Psychiatric diagnoses were made with DSM-III Criteria, using the Diagnostic Interview Schedule, and subjects also completed the Symptom Checklist. Our results in the methadone group suggest (a) near-maximal stimulation of prolactin secretion, with a blunted prolactin response to insulin hypoglycemia, (b) mild suppression of cortisol levels, but an exaggerated cortisol response to stimulation, (c) a delayed and inhibited insulin response to food ingestion with resulting mild hyperglycemia, (d) low body weight, but elevated calorie ingestion, and (e) inability to concentrate urine when dehydrated, which was partially corrected by administration of arginine vasopressin. Phobic disorder was associated with a lower prolactin response to both inhibitory and stimulatory challenges. Depression did not appear to be related to the increased cortisol response to stimulation. These results suggest several potentially fruitful areas for future investigation, including the prolactin system and anxiety disorders, nutrient ingestion and metabolism, and posterior pituitary function. PMID:2554359

  1. Identifying Human Factors Issues in Aircraft Maintenance Operations

    NASA Technical Reports Server (NTRS)

    Veinott, Elizabeth S.; Kanki, Barbara G.; Shafto, Michael G. (Technical Monitor)

    1995-01-01

    Maintenance operations incidents submitted to the Aviation Safety Reporting System (ASRS) between 1986-1992 were systematically analyzed in order to identify issues relevant to human factors and crew coordination. This exploratory analysis involved 95 ASRS reports which represented a wide range of maintenance incidents. The reports were coded and analyzed according to the type of error (e.g, wrong part, procedural error, non-procedural error), contributing factors (e.g., individual, within-team, cross-team, procedure, tools), result of the error (e.g., aircraft damage or not) as well as the operational impact (e.g., aircraft flown to destination, air return, delay at gate). The main findings indicate that procedural errors were most common (48.4%) and that individual and team actions contributed to the errors in more than 50% of the cases. As for operational results, most errors were either corrected after landing at the destination (51.6%) or required the flight crew to stop enroute (29.5%). Interactions among these variables are also discussed. This analysis is a first step toward developing a taxonomy of crew coordination problems in maintenance. By understanding what variables are important and how they are interrelated, we may develop intervention strategies that are better tailored to the human factor issues involved.

  2. Portable Knowledge-Based Diagnostic And Maintenance Systems

    NASA Astrophysics Data System (ADS)

    Darvish, John; Olson, Noreen S.

    1989-03-01

    It is difficult to diagnose faults and maintain weapon systems because (1) they are highly complex pieces of equipment composed of multiple mechanical, electrical, and hydraulic assemblies, and (2) talented maintenance personnel are continuously being lost through the attrition process. To solve this problem, we developed a portable diagnostic and maintenance aid that uses a knowledge-based expert system. This aid incorporates diagnostics, operational procedures, repair and replacement procedures, and regularly scheduled maintenance into one compact, 18-pound graphics workstation. Drawings and schematics can be pulled up from the CD-ROM to assist the operator in answering the expert system's questions. Work for this aid began with the development of the initial knowledge-based expert system in a fast prototyping environment using a LISP machine. The second phase saw the development of a personal computer-based system that used videodisc technology to pictorially assist the operator. The current version of the aid eliminates the high expenses associated with videodisc preparation by scanning in the art work already in the manuals. A number of generic software tools have been developed that streamlined the construction of each iteration of the aid; these tools will be applied to the development of future systems.

  3. Does the Health Maintenance Facility Provide Speciality Capabilities?

    NASA Technical Reports Server (NTRS)

    Boyce, Joey; Wurgler, James; Broadwell, Kim; Martin, William; Stiernberg, Charles M.; Bove, Alfred; Fromm, Rob; O'Neill, Daniel

    1991-01-01

    The Health Maintenance Facility (HMF) is capable of handling all minor illnesses, most moderate illnesses, and some major illnesses on board a space station. Its primary purpose should be to treat problems that are mission threatening, not life threatening. The HMF will have greater medical capabilities than those currently on Navy submarines. Much of the discussion in this document focuses on the possibilities of treating specific medical conditions on board a space station. The HMF will be limited to caring for critically ill patients for a few days, so a crew return vehicle will be important.

  4. Randomized trial of tapas acupressure technique for weight loss maintenance

    PubMed Central

    2012-01-01

    Background Obesity is an urgent public health problem, yet only a few clinical trials have systematically tested the efficacy of long-term weight-loss maintenance interventions. This randomized clinical trial tested the efficacy of a novel mind and body technique for weight-loss maintenance. Methods Participants were obese adults who had completed a six-month behavioral weight-loss program prior to randomization. Those who successfully lost weight were randomized into either an experimental weight-loss maintenance intervention, Tapas Acupressure Technique (TAT®), or a control intervention comprised of social-support group meetings (SS) led by professional facilitators. TAT combines self-applied light pressure to specific acupressure points accompanied by a prescribed sequence of mental steps. Participants in both maintenance conditions attended eight group sessions over six months of active weight loss maintenance intervention, followed by an additional 6 months of no intervention. The main outcome measure was change in weight from the beginning of the weight loss maintenance intervention to 12 months later. Secondary outcomes were change in depression, stress, insomnia, and quality of life. We used analysis of covariance as the primary analysis method. Missing values were replaced using multiple imputation. Results Among 285 randomized participants, 79% were female, mean age was 56 (standard deviation (sd) = 11), mean BMI at randomization was 34 (sd = 5), and mean initial weight loss was 9.8 kg (sd = 5). In the primary outcome model, there was no significant difference in weight regain between the two arms (1.72 kg (se 0.85) weight regain for TAT and 2.96 kg (se 0.96) weight regain for SS, p < 0.097) Tests of between- arm differences for secondary outcomes were also not significant. A secondary analysis showed a significant interaction between treatment and initial weight loss (p < .036), with exploratory post hoc tests showing that greater initial weight loss was associated with more weight regain for SS but less weight regain for TAT. Conclusions The primary analysis showed no significant difference in weight regain between TAT and SS, while secondary and post hoc analyses indicate direction for future research. Trial Registration ClinicalTrials.gov: NCT00526565 PMID:22417316

  5. Problem of Time: Facets and Machian Strategy

    E-print Network

    Anderson, Edward

    2013-01-01

    The Problem of Time in Quantum Gravity is that `time' in GR and `time' in ordinary quantum theory are mutually incompatible notions, which is problematic in trying to put these two theories together to form a theory of Quantum Gravity. It has 8 facets, of which I reconceptualize and re-name the following. The Frozen Formalism Problem as Temporal Relationalism, the Thin Sandwich Problem as Configurational Relationalism via Best Matching, the Problem of Observables as the Problem of Beables, the Functional Evolution Problem as the Constraint Closure Problem, and I point out multiplicity of the Global and Multiple-Choice Problems of Time. This article contains a local resolution to the Problem of Time at the conceptual level and which is actually realizable for the relational triangle and minisuperspace models. This resolution is, moreover, Machian, and has three levels: classical, semiclassical and combined semiclassical-histories-records. The current frontiers of this program toward resolution of the Problem o...

  6. Effective maintenance practices to manage system aging

    SciTech Connect

    Chockie, A.; Bjorkelo, K.

    1992-01-01

    For a variety of economic and technical reasons, there has been a growing concern with the aging of complex systems and components and the role that maintenance can play in reducing this degradation. A study for the Nuclear Regulatory Commission was recently undertaken to identify effective maintenance practices that could be adapted by the nuclear industry in the United States to assist in managing the aging degradation of plant systems and components. Four organizations were examined to assess the influence that their maintenance programs have on their ability to address the systems and component aging degradation issues. An effective maintenance program was found to be essential to the management of system and component aging. The four key elements of an effective maintenance program that are important to an aging management program were identified. These are: the selection of critical systems and components; the development of an understanding of aging through the collection and analysis of equipment performance information; the development of appropriate preventive and predictive maintenance tasks to manage equipment and system aging degradation; the use of feedback mechanisms to continuously improve the management of aging systems and components. These elements were found to be common to all four organizations. In examining how the four organizations have structured their maintenance programs to include these key elements provides valuable lessons not only for the nuclear power industry, but also for any industrial organization that is concerned with the management of system and component aging degradation. This document provides detail, of these studies.

  7. 40 CFR 63.105 - Maintenance wastewater requirements.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ...2013-07-01 false Maintenance wastewater requirements. 63.105 Section...Industry § 63.105 Maintenance wastewater requirements. (a) Each owner...tasks that are anticipated to create wastewater during maintenance activities....

  8. 40 CFR 63.105 - Maintenance wastewater requirements.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ...2014-07-01 false Maintenance wastewater requirements. 63.105 Section...Industry § 63.105 Maintenance wastewater requirements. (a) Each owner...tasks that are anticipated to create wastewater during maintenance activities....

  9. 40 CFR 63.105 - Maintenance wastewater requirements.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ...2012-07-01 false Maintenance wastewater requirements. 63.105 Section...Industry § 63.105 Maintenance wastewater requirements. (a) Each owner...tasks that are anticipated to create wastewater during maintenance activities....

  10. 31 CFR 202.7 - Maintenance of balances within authorizations.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ...2014-07-01 false Maintenance of balances within authorizations. 202.7 Section...GOVERNMENT 1 § 202.7 Maintenance of balances within authorizations. (a...are responsible for the maintenance of balances in such accounts within the limits...

  11. 31 CFR 202.7 - Maintenance of balances within authorizations.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...2010-07-01 false Maintenance of balances within authorizations. 202.7 Section...GOVERNMENT 1 § 202.7 Maintenance of balances within authorizations. (a...are responsible for the maintenance of balances in such accounts within the limits...

  12. 31 CFR 202.7 - Maintenance of balances within authorizations.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ...2013-07-01 false Maintenance of balances within authorizations. 202.7 Section...GOVERNMENT 1 § 202.7 Maintenance of balances within authorizations. (a...are responsible for the maintenance of balances in such accounts within the limits...

  13. 31 CFR 202.7 - Maintenance of balances within authorizations.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ...2011-07-01 false Maintenance of balances within authorizations. 202.7 Section...GOVERNMENT 1 § 202.7 Maintenance of balances within authorizations. (a...are responsible for the maintenance of balances in such accounts within the limits...

  14. 31 CFR 202.7 - Maintenance of balances within authorizations.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ...2012-07-01 false Maintenance of balances within authorizations. 202.7 Section...GOVERNMENT 1 § 202.7 Maintenance of balances within authorizations. (a...are responsible for the maintenance of balances in such accounts within the limits...

  15. 12 CFR 208.6 - Establishment and maintenance of branches.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... Establishment and maintenance of branches. 208... Establishment and maintenance of branches. (a...the establishment and maintenance of national bank...its discretion and based on the facts and circumstances... (1) Financial condition and management....

  16. 12 CFR 208.6 - Establishment and maintenance of branches.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... Establishment and maintenance of branches. 208... Establishment and maintenance of branches. (a...the establishment and maintenance of national bank...its discretion and based on the facts and circumstances... (1) Financial condition and management....

  17. 49 CFR 238.503 - Inspection, testing, and maintenance requirements.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ...scheduled maintenance intervals...equipment based on an analysis...employee working conditions that arise...tests, and maintenance set forth...employee working conditions. (j...testing, and maintenance program...

  18. 49 CFR 238.503 - Inspection, testing, and maintenance requirements.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ...scheduled maintenance intervals...equipment based on an analysis...employee working conditions that arise...tests, and maintenance set forth...employee working conditions. (j...testing, and maintenance program...

  19. 12 CFR 208.6 - Establishment and maintenance of branches.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... Establishment and maintenance of branches. 208... Establishment and maintenance of branches. (a...the establishment and maintenance of national bank...its discretion and based on the facts and circumstances... (1) Financial condition and management....

  20. 49 CFR 238.503 - Inspection, testing, and maintenance requirements.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ...scheduled maintenance intervals...equipment based on an analysis...employee working conditions that arise...tests, and maintenance set forth...employee working conditions. (j...testing, and maintenance program...

  1. 49 CFR 238.503 - Inspection, testing, and maintenance requirements.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ...scheduled maintenance intervals...equipment based on an analysis...employee working conditions that arise...tests, and maintenance set forth...employee working conditions. (j...testing, and maintenance program...

  2. 12 CFR 208.6 - Establishment and maintenance of branches.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... Establishment and maintenance of branches. 208... Establishment and maintenance of branches. (a...the establishment and maintenance of national bank...its discretion and based on the facts and circumstances... (1) Financial condition and management....

  3. 49 CFR 238.503 - Inspection, testing, and maintenance requirements.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ...scheduled maintenance intervals...equipment based on an analysis...employee working conditions that arise...tests, and maintenance set forth...employee working conditions. (j...testing, and maintenance program...

  4. 12 CFR 208.6 - Establishment and maintenance of branches.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... Establishment and maintenance of branches. 208... Establishment and maintenance of branches. (a...the establishment and maintenance of national bank...its discretion and based on the facts and circumstances... (1) Financial condition and management....

  5. Maintenance scheduling for modular systems-models and algorithms

    E-print Network

    Zarybnisky, Eric J. (Eric Jack), 1979-

    2011-01-01

    Maintenance scheduling is an integral part of many complex systems. For instance, without effective maintenance scheduling, the combined effects of preventative and corrective maintenance can have severe impacts on the ...

  6. 49 CFR 230.66 - Design, construction, and maintenance.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... ADMINISTRATION, DEPARTMENT OF TRANSPORTATION STEAM LOCOMOTIVE INSPECTION AND MAINTENANCE STANDARDS Steam Locomotives and Tenders § 230.66 Design, construction, and maintenance. The steam locomotive owner and operator are responsible for the general design, construction and maintenance of the steam locomotives...

  7. 49 CFR 230.66 - Design, construction, and maintenance.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... ADMINISTRATION, DEPARTMENT OF TRANSPORTATION STEAM LOCOMOTIVE INSPECTION AND MAINTENANCE STANDARDS Steam Locomotives and Tenders § 230.66 Design, construction, and maintenance. The steam locomotive owner and operator are responsible for the general design, construction and maintenance of the steam locomotives...

  8. 49 CFR 230.66 - Design, construction, and maintenance.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... ADMINISTRATION, DEPARTMENT OF TRANSPORTATION STEAM LOCOMOTIVE INSPECTION AND MAINTENANCE STANDARDS Steam Locomotives and Tenders § 230.66 Design, construction, and maintenance. The steam locomotive owner and operator are responsible for the general design, construction and maintenance of the steam locomotives...

  9. 49 CFR 230.66 - Design, construction, and maintenance.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... ADMINISTRATION, DEPARTMENT OF TRANSPORTATION STEAM LOCOMOTIVE INSPECTION AND MAINTENANCE STANDARDS Steam Locomotives and Tenders § 230.66 Design, construction, and maintenance. The steam locomotive owner and operator are responsible for the general design, construction and maintenance of the steam locomotives...

  10. 49 CFR 230.66 - Design, construction, and maintenance.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... ADMINISTRATION, DEPARTMENT OF TRANSPORTATION STEAM LOCOMOTIVE INSPECTION AND MAINTENANCE STANDARDS Steam Locomotives and Tenders § 230.66 Design, construction, and maintenance. The steam locomotive owner and operator are responsible for the general design, construction and maintenance of the steam locomotives...

  11. 40 CFR 63.105 - Maintenance wastewater requirements.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...2010-07-01 false Maintenance wastewater requirements. 63.105 Section...Industry § 63.105 Maintenance wastewater requirements. (a) Each owner...tasks that are anticipated to create wastewater during maintenance activities....

  12. 40 CFR 63.105 - Maintenance wastewater requirements.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ...2011-07-01 false Maintenance wastewater requirements. 63.105 Section...Industry § 63.105 Maintenance wastewater requirements. (a) Each owner...tasks that are anticipated to create wastewater during maintenance activities....

  13. 7 CFR 1767.27 - Operation and maintenance expenses.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... Power Production Expenses Steam Power Generation (Operation) 500Operation Supervision and Engineering... 506Miscellaneous Steam Power Expenses 507Rents 509Allowances (Maintenance) 510Maintenance Supervision and... 514Maintenance of Miscellaneous Steam Plant Nuclear Power Generation (Operation) 517Operation Supervision...

  14. A Proposed Approach for Prioritizing Maintenance at NASA Centers

    NASA Technical Reports Server (NTRS)

    Dunn, Steven C.; Sawyer, Melvin H.

    2013-01-01

    The National Aeronautics and Space Administration (NASA) manages a vast array of infrastructure assets across ten National Centers with a worth of at least 30 billion dollars. Eighty percent of this infrastructure is greater than 40 years old and is in degraded condition. Maintenance budgets are typically less than one percent of current replacement value (CRV), much less than the 2-4% recommended by the National Research Council. The maintenance backlog was 2.55 billion dollars in FY10 and growing. NASA s annual budgets have flattened and are at risk of being reduced, so the problem is becoming even more difficult. NASA Centers utilize various means to prioritize and accomplish maintenance within available budgets, though data is suspect and processes are variable. This paper offers a structured means to prioritize maintenance based on mission criticality and facility performance (ability of the facility to deliver on its purpose). Mission alignment is assessed using the current timeframe Mission Dependence Index and a measure of facility alignment with the 2011 NASA Strategic Plan for the long-term perspective. Facility performance is assessed by combining specific findings from a structured facility condition assessment and an assessment of actual functional output. These are then combined in a matrix to identify the facilities most critical to mission and able to deliver services. The purpose of this approach is to provide the best benefits for the available funding. Additionally, this rationale can also be applied to the prioritization of investment (recapitalization) projects so that the ultimate customers of this paper, the senior infrastructure managers at each NASA Center, are better able to strategically manage their capabilities.

  15. Long Length Contaminated Equipment Maintenance Plan

    SciTech Connect

    ESVELT, C.A.

    2000-02-01

    The purpose of this document is to provide the maintenance requirements of the Long Length Contaminated Equipment (LLCE) trailers and provide a basis for the maintenance frequencies selected. This document is applicable to the LLCE Receiver trailer and Transport trailer assembled by Mobilized Systems Inc. (MSI). Equipment used in conjunction with, or in support of, these trailers is not included. This document does not provide the maintenance requirements for checkout and startup of the equipment following the extended lay-up status which began in the mid 1990s. These requirements will be specified in other documentation.

  16. Coherence versus interferometric resolution

    SciTech Connect

    Luis, Alfredo

    2010-06-15

    We examine the relation between second-order coherence and resolution in the interferometric detection of phase shifts. While for classical thermal light resolution and second-order coherence are synonymous, we show that for quantum light beams reaching optimum precision second-order coherence and resolution become antithetical.

  17. Magnetically Attached Multifunction Maintenance Rover

    NASA Technical Reports Server (NTRS)

    Bar-Cohen, Yoseph; Joffe, Benjamin

    2005-01-01

    A versatile mobile telerobot, denoted the magnetically attached multifunction maintenance rover (MAGMER), has been proposed for use in the inspection and maintenance of the surfaces of ships, tanks containing petrochemicals, and other large ferromagnetic structures. As its name suggests, this robot would utilize magnetic attraction to adhere to a structure. As it moved along the surface of the structure, the MAGMER would perform tasks that could include close-up visual inspection by use of video cameras, various sensors, and/or removal of paint by water-jet blasting, laser heating, or induction heating. The water-jet nozzles would be mounted coaxially within compressed-air-powered venturi nozzles that would collect the paint debris dislodged by the jets. The MAGMER would be deployed, powered, and controlled from a truck, to which it would be connected by hoses for water, compressed air, and collection of debris and by cables for electric power and communication (see Figure 1). The operation of the MAGMER on a typical large structure would necessitate the use of long cables and hoses, which can be heavy. To reduce the load of the hoses and cables on the MAGMER and thereby ensure its ability to adhere to vertical and overhanging surfaces, the hoses and cables would be paid out through telescopic booms that would be parts of a MAGMER support system. The MAGMER would move by use of four motorized, steerable wheels, each of which would be mounted in an assembly that would include permanent magnets and four pole pieces (see Figure 2). The wheels would protrude from between the pole pieces by only about 3 mm, so that the gap between the pole pieces and the ferromagnetic surface would be just large enough to permit motion along the surface but not so large as to reduce the magnetic attraction excessively. In addition to the wheel assemblies, the MAGMER would include magnetic adherence enhancement fixtures, which would comprise arrays of permanent magnets and pole pieces that could be adjusted to maximize or minimize the overall attractive magnetic force. Even with a paint thickness of 2 mm, a preliminary design provides a safety factor of 5 in the magnetic force in the upside- down, water-jets-operating condition, in which the total load (including the weight of the MAGMER and cables and the water-jet force) would be about 260 lb (the weight of 118 kg). Optionally, the MAGMER could carry magnetic shielding and/or could be equipped with a demagnetizing module to remove residual magnetism from the structure. The MAGMER would carry four charge-coupled-device cameras for visual inspection, monitoring of operation, navigation, and avoidance of collisions with obstacles. The control system of the MAGMER would include navigation and collision-avoidance subsystems that would utilize surface features as landmarks, in addition to direct images of obstacles.

  18. Attitude Determination and Control System (ADCS) and Maintenance and Diagnostic System (MDS): A maintenance and diagnostic system for Space Station Freedom

    NASA Technical Reports Server (NTRS)

    Toms, David; Hadden, George D.; Harrington, Jim

    1990-01-01

    The Maintenance and Diagnostic System (MDS) that is being developed at Honeywell to enhance the Fault Detection Isolation and Recovery system (FDIR) for the Attitude Determination and Control System on Space Station Freedom is described. The MDS demonstrates ways that AI-based techniques can be used to improve the maintainability and safety of the Station by helping to resolve fault anomalies that cannot be fully determined by built-in-test, by providing predictive maintenance capabilities, and by providing expert maintenance assistance. The MDS will address the problems associated with reasoning about dynamic, continuous information versus only about static data, the concerns of porting software based on AI techniques to embedded targets, and the difficulties associated with real-time response. An initial prototype was built of the MDS. The prototype executes on Sun and IBM PS/2 hardware and is implemented in the Common Lisp; further work will evaluate its functionality and develop mechanisms to port the code to Ada.

  19. 40 CFR 86.094-25 - Maintenance.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...change, fuel filter change, air filter change, cooling system maintenance, adjustment of...lash, timing, adjustment of air pump drive belt tension...Otto-cycle vehicle cold-start enrichment system may be performed if there...

  20. 40 CFR 86.094-25 - Maintenance.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ...change, fuel filter change, air filter change, cooling system maintenance, adjustment of...lash, timing, adjustment of air pump drive belt tension...Otto-cycle vehicle cold-start enrichment system may be performed if there...

  1. Maintenance implementation plan for fuel supply shutdown

    SciTech Connect

    Stephenson, R.L.

    1995-06-01

    This Maintenance Implementation Plan is written to satisfy the requirements of DOE Order 4330.4B, ``MAINTENANCE MANAGEMENT PROGRAM``, that specifies the general policy and objectives for the establishment of DOE controlled maintenance programs. These Programs provide for the management and performance of cost-effective maintenance and repair of Department of Energy (DOE) property, which includes facilities. A review of DOE Order 4330.4B, particularly Chapter II the nuclear portion, against existing WHC site programs and policies has provided assurance that most requirements of this order have already been implemented by existing WHC programs. Applicable requirements and guidelines of 4330.4B that are deficient or not implemented are presently being developed and implemented through WHC site policies and programs. Where no program is presently identified or being developed for 4330.4B requirements, responsibility for implementation has been assigned within this plan.

  2. 49 CFR 193.2605 - Maintenance procedures.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ...OF TRANSPORTATION (CONTINUED) PIPELINE SAFETY LIQUEFIED NATURAL GAS FACILITIES: FEDERAL SAFETY STANDARDS Maintenance ...tests determined under paragraph (a) of this section and their frequency of performance; and (2) A description of other...

  3. Effects of dairy intake on weight maintenance

    E-print Network

    Zemel, Michael B.; Donnelly, Joseph E.; Smith, Bryan K.; Sullivan, Debra K.; Richards, Joanna; Morgan-Hanusa, Danielle; Mayo, Matthew S.; Sun, Xiaocun; Cook-Wiens, Galen; Bailey, Bruce W.; Van Walleghen, Emily L.; Washburn, Richard A.

    2008-10-24

    , and respiratory quotient were secondary outcomes. Energy intake, calcium intake, dairy intake, and physical activity were measured as process evaluation. Results: During weight maintenance, there were no overall significant differences for weight or body...

  4. 40 CFR 86.1725-99 - Maintenance.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... subpart, with the following additions: (a) Hybrid electric vehicles that use Otto-cycle or diesel engines are subject to the applicable Otto-cycle or diesel engine maintenance requirements of § 86.094-25...

  5. 40 CFR 86.1725-99 - Maintenance.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... subpart, with the following additions: (a) Hybrid electric vehicles that use Otto-cycle or diesel engines are subject to the applicable Otto-cycle or diesel engine maintenance requirements of § 86.094-25...

  6. 40 CFR 86.1725-99 - Maintenance.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... subpart, with the following additions: (a) Hybrid electric vehicles that use Otto-cycle or diesel engines are subject to the applicable Otto-cycle or diesel engine maintenance requirements of § 86.094-25...

  7. EMMA: The expert system for munition maintenance

    NASA Technical Reports Server (NTRS)

    Mullins, Barry E.

    1988-01-01

    Expert Missile Maintenance Aid (EMMA) is a first attempt to enhance maintenance of the tactical munition at the field and depot level by using artificial intelligence (AI) techniques. The ultimate goal of EMMA is to help a novice maintenance technician isolate and diagnose electronic, electromechanical, and mechanical equipment faults to the board/chassis level more quickly and consistently than the best human expert using the best currently available automatic test equipment (ATE). To this end, EMMA augments existing ATE with an expert system that captures the knowledge of design and maintenance experts. The EMMA program is described, including the evaluation of field-level expert system prototypes, the description of several study tasks performed during EMMA, and future plans for a follow-on program. This paper will briefly address several study tasks performed during EMMA. The paper concludes with a discussion of future plans for a follow-on program and other areas of concern.

  8. 24 CFR 266.507 - Maintenance requirements.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ...RISK-SHARING PROGRAM FOR INSURED AFFORDABLE MULTIFAMILY PROJECT LOANS Project Management and Servicing § 266.507 Maintenance requirements. The mortgagor must maintain the project in accordance with the physical condition...

  9. 40 CFR 86.098-25 - Maintenance.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ...Engines, and for 1985 and Later Model Year New Gasoline Fueled, Natural Gas-Fueled, Liquefied Petroleum Gas-Fueled and Methanol-Fueled Heavy-Duty Vehicles § 86.098-25 Maintenance. (a) [Reserved] (b)(1)-(2) [Reserved]...

  10. 40 CFR 86.094-25 - Maintenance.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ...Engines, and for 1985 and Later Model Year New Gasoline Fueled, Natural Gas-Fueled, Liquefied Petroleum Gas-Fueled and Methanol-Fueled Heavy-Duty Vehicles § 86.094-25 Maintenance. (a) [Reserved] (b) This section specifies...

  11. Risk impact of maintenance program changes

    E-print Network

    Credit, Kimberly A. (Kimberly April)

    1992-01-01

    This study quantifies the change in one measure of plant risk, the frequency of loss of long-term decay heat removal, due to changes in maintenance at the James A. Fitzpatrick (JAF) plant. Quantification is accomplished ...

  12. 46 CFR 185.702 - Maintenance.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    .... (a) The manufacturer's instructions for onboard maintenance of survival craft, rescue boats, and launching appliances, manufactured on or after March 11, 1996, must be onboard a vessel of more than...

  13. 46 CFR 122.702 - Maintenance.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... for onboard maintenance of survival craft, rescue boats, and launching appliances, manufactured on or after March 11, 1996, must be onboard a vessel of more than 19.8 meters (65 feet) in length and...

  14. 46 CFR 185.702 - Maintenance.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    .... (a) The manufacturer's instructions for onboard maintenance of survival craft, rescue boats, and launching appliances, manufactured on or after March 11, 1996, must be onboard a vessel of more than...

  15. 46 CFR 185.702 - Maintenance.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    .... (a) The manufacturer's instructions for onboard maintenance of survival craft, rescue boats, and launching appliances, manufactured on or after March 11, 1996, must be onboard a vessel of more than...

  16. 46 CFR 185.702 - Maintenance.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    .... (a) The manufacturer's instructions for onboard maintenance of survival craft, rescue boats, and launching appliances, manufactured on or after March 11, 1996, must be onboard a vessel of more than...

  17. 46 CFR 122.702 - Maintenance.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... for onboard maintenance of survival craft, rescue boats, and launching appliances, manufactured on or after March 11, 1996, must be onboard a vessel of more than 19.8 meters (65 feet) in length and...

  18. 46 CFR 122.702 - Maintenance.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... for onboard maintenance of survival craft, rescue boats, and launching appliances, manufactured on or after March 11, 1996, must be onboard a vessel of more than 19.8 meters (65 feet) in length and...

  19. 46 CFR 122.702 - Maintenance.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... for onboard maintenance of survival craft, rescue boats, and launching appliances, manufactured on or after March 11, 1996, must be onboard a vessel of more than 19.8 meters (65 feet) in length and...

  20. 46 CFR 185.702 - Maintenance.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    .... (a) The manufacturer's instructions for onboard maintenance of survival craft, rescue boats, and launching appliances, manufactured on or after March 11, 1996, must be onboard a vessel of more than...

  1. 46 CFR 122.702 - Maintenance.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... for onboard maintenance of survival craft, rescue boats, and launching appliances, manufactured on or after March 11, 1996, must be onboard a vessel of more than 19.8 meters (65 feet) in length and...

  2. Software Assurance During Maintenance Paul E. Black

    E-print Network

    Black, Paul E.

    Software Assurance During Maintenance software* *. We do not want to duplicate must yield assurance information in a standardizedeform Assurance Metrics And ToolcEvalua-omplement them. tion (SAMATE) project is developing specifications

  3. 50 CFR 80.17 - Maintenance.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ...CONTINUED) FINANCIAL ASSISTANCE-WILDLIFE SPORT FISH RESTORATION PROGRAM ADMINISTRATIVE...WILDLIFE RESTORATION AND DINGELL-JOHNSON SPORT FISH RESTORATION ACTS § 80.17 Maintenance...acquired or constructed with Wildlife and Sport Fish Restoration Program funds...

  4. A proven approach for more effective software development and maintenance

    NASA Technical Reports Server (NTRS)

    Pajerski, Rose; Hall, Dana; Sinclair, Craig

    1994-01-01

    Modern space flight mission operations and associated ground data systems are increasingly dependent upon reliable, quality software. Critical functions such as command load preparation, health and status monitoring, communications link scheduling and conflict resolution, and transparent gateway protocol conversion are routinely performed by software. Given budget constraints and the ever increasing capabilities of processor technology, the next generation of control centers and data systems will be even more dependent upon software across all aspects of performance. A key challenge now is to implement improved engineering, management, and assurance processes for the development and maintenance of that software; processes that cost less, yield higher quality products, and that self-correct for continual improvement evolution. The NASA Goddard Space Flight Center has a unique experience base that can be readily tapped to help solve the software challenge. Over the past eighteen years, the Software Engineering Laboratory within the code 500 Flight Dynamics Division has evolved a software development and maintenance methodology that accommodates the unique characteristics of an organization while optimizing and continually improving the organization's software capabilities. This methodology relies upon measurement, analysis, and feedback much analogous to that of control loop systems. It is an approach with a time-tested track record proven through repeated applications across a broad range of operational software development and maintenance projects. This paper describes the software improvement methodology employed by the Software Engineering Laboratory, and how it has been exploited within the Flight Dynamics Division with GSFC Code 500. Examples of specific improvement in the software itself and its processes are presented to illustrate the effectiveness of the methodology. Finally, the initial findings are given when this methodology was applied across the mission operations and ground data systems software domains throughout Code 500.

  5. NASA work unit system file maintenance manual

    NASA Technical Reports Server (NTRS)

    1972-01-01

    The NASA Work Unit System is a management information system for research tasks (i.e., work units) performed under NASA grants and contracts. It supplies profiles on research efforts and statistics on fund distribution. The file maintenance operator can add, delete and change records at a remote terminal or can submit punched cards to the computer room for batch update. The system is designed for file maintenance by a person with little or no knowledge of data processing techniques.

  6. Economics of a total maintenance coatings program

    SciTech Connect

    Poncio, S.; Adkison, P. )

    1994-08-01

    Coating costs are escalating due to increased awareness of the environment and safety and health issues. Owners can reduce the overall cost of maintenance painting projects through the implementation of a total quality program. This program should encompass project pre-planning, evaluation of safety and quality assurance programs, and analysis of employee absenteeism and turnover. The information presented is a case history of one utility's experience managing a maintenance painting program during a five-year period.

  7. Finding Optimally Balanced Words for Production Planning and Maintenance Scheduling Jeffrey W. Herrmann

    E-print Network

    Herrmann, Jeffrey W.

    1 Finding Optimally Balanced Words for Production Planning and Maintenance Scheduling Jeffrey W.edu Abstract Balanced words are useful for scheduling mixed-model, just-in-time assembly lines, planning. This paper considers the challenging problem of finding a balanced word (a periodic sequence) for a finite

  8. Bird-resistant pollination bags for sorghum breeding and germplasm maintenance

    Technology Transfer Automated Retrieval System (TEKTRAN)

    Bird damage is a problem in sorghum breeding and germplasm maintenance operations. Paper pollination bags are damaged by rain and provide minimal deterrent to birds. To overcome these limitations we fabricated pollination bags from spun polyethylene fiber sheeting. Seed loss by bird damage was elimi...

  9. Good School Maintenance. A Manual of Programs and Procedures for Buildings--Grounds--Equipment.

    ERIC Educational Resources Information Center

    Harroun, Jack T., Ed.

    This guide provides a basic program for managers and supervisors responsible for the care of buildings, grounds, and equipment; provides the maintenance staff member with basic information and solutions to typical problems; and is intended to be used as a training tool and a reference source. The manual is divided into five categories. (1) "Basics…

  10. Is Sampling Useful in Data Mining? A Case in the Maintenance of Discovered Association Rules.

    E-print Network

    Wu, Xindong

    Is Sampling Useful in Data Mining? A Case in the Maintenance of Discovered Association Rules. S is the task of data mining. 1 #12; Mining of association rules is a research topic that has received much­id, etc. The association rule mining problem is to find out all the rules which have the form ``A customer

  11. A Decision Support System for Concrete Bridge Maintenance

    NASA Astrophysics Data System (ADS)

    Rashidi, Maria; Lemass, Brett; Gibson, Peter

    2010-05-01

    The maintenance of bridges as a key element in transportation infrastructure has become a major concern for asset managers and society due to increasing traffic volumes, deterioration of existing bridges and well-publicised bridge failures. A pivotal responsibility for asset managers in charge of bridge remediation is to identify the risks and assess the consequences of remediation programs to ensure that the decisions are transparent and lead to the lowest predicted losses in recognized constraint areas. The ranking of bridge remediation treatments can be quantitatively assessed using a weighted constraint approach to structure the otherwise ill-structured phases of problem definition, conceptualization and embodiment [1]. This Decision Support System helps asset managers in making the best decision with regards to financial limitations and other dominant constraints imposed upon the problem at hand. The risk management framework in this paper deals with the development of a quantitative intelligent decision support system for bridge maintenance which has the ability to provide a source for consistent decisions through selecting appropriate remediation treatments based upon cost, service life, product durability/sustainability, client preferences, legal and environmental constraints. Model verification and validation through industry case studies is ongoing.

  12. M3A system (2000 2005) operation and maintenance

    NASA Astrophysics Data System (ADS)

    Petihakis, G.; Drakopoulos, P.; Nittis, C.; Zervakis, V.; Christodoulou, C.; Tziavos, C.

    2006-05-01

    During the Pilot Phase of the Mediterranean Forecasting System (MFSPP) (1998-2001) a prototype observing system (Mediterranean Moored Multi-sensor Array - M3A) was designed, developed and operated in the Cretan Sea for continuous oceanographic measurements in real time. The main problems encountered were associated with biofouling, underwater and aerial communication and with the design of the surface buoy. In the second phase of the MFS project named Mediterranean Forecasting System Towards Environmental Predictions (MFSTEP) (2001-2005), the aim was to solve those problems and to consolidate the M3A. During the approximately five years of operation there were 13 scheduled and 15 emergency visits with a total duration of 65 days. The acquired experience through the maintenance program proved that the continuous observation of a so important system with a relative low cost is feasible.

  13. A Comparison of Two Instructional Approaches on Mathematical Word Problem Solving by Students with Learning Problems.

    ERIC Educational Resources Information Center

    Xin, Yan Ping; Jitendra, Asha; Deatline-Buchman, Andria; Hickman, Wesley; Bertram, Dean

    This study examined the differential effects of two instructional strategies on the acquisition, maintenance, and generalization of mathematical word problem solving by students with learning disabilities: an explicit schema-based problem solving strategy (SBI) and a traditional general heuristic instructional strategy (TI). Twenty-two middle…

  14. Balance Problems

    MedlinePLUS

    ... version of this page please turn Javascript on. Balance Problems About Balance Problems Have you ever felt dizzy, lightheaded, or ... dizziness problem during the past year. Why Good Balance is Important Having good balance means being able ...

  15. A Minimum (Delta)V Orbit Maintenance Strategy for Low-Altitude Missions Using Burn Parameter Optimization

    NASA Technical Reports Server (NTRS)

    Brown, Aaron J.

    2011-01-01

    Orbit maintenance is the series of burns performed during a mission to ensure the orbit satisfies mission constraints. Low-altitude missions often require non-trivial orbit maintenance (Delta)V due to sizable orbital perturbations and minimum altitude thresholds. A strategy is presented for minimizing this (Delta)V using impulsive burn parameter optimization. An initial estimate for the burn parameters is generated by considering a feasible solution to the orbit maintenance problem. An example demonstrates the dV savings from the feasible solution to the optimal solution.

  16. 40 CFR 35.935-12 - Operation and maintenance.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... management, operation and maintenance personnel; (4) Adequate budget for operation and maintenance; (5... 40 Protection of Environment 1 2010-07-01 2010-07-01 false Operation and maintenance. 35.935-12... Operation and maintenance. (a) The grantee must make provision satisfactory to the Regional...

  17. ENHANCEMENT, OPERATION, AND MAINTENANCE ACTIVITIES WILDLIFE MITIGATION PROJECTS

    E-print Network

    ............................................................................................................. 9 6. WATER SOURCE DEVELOPMENT/MAINTENANCE........................................ 9 7. NOXIOUS WEED

  18. 14 CFR 91.421 - Rebuilt engine maintenance records.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ..., Preventive Maintenance, and Alterations § 91.421 Rebuilt engine maintenance records. (a) The owner or operator may use a new maintenance record, without previous operating history, for an aircraft engine... 14 Aeronautics and Space 2 2010-01-01 2010-01-01 false Rebuilt engine maintenance records....

  19. 14 CFR 91.421 - Rebuilt engine maintenance records.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ..., Preventive Maintenance, and Alterations § 91.421 Rebuilt engine maintenance records. (a) The owner or operator may use a new maintenance record, without previous operating history, for an aircraft engine... 14 Aeronautics and Space 2 2014-01-01 2014-01-01 false Rebuilt engine maintenance records....

  20. 14 CFR 91.421 - Rebuilt engine maintenance records.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ..., Preventive Maintenance, and Alterations § 91.421 Rebuilt engine maintenance records. (a) The owner or operator may use a new maintenance record, without previous operating history, for an aircraft engine... 14 Aeronautics and Space 2 2013-01-01 2013-01-01 false Rebuilt engine maintenance records....

  1. 14 CFR 91.421 - Rebuilt engine maintenance records.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ..., Preventive Maintenance, and Alterations § 91.421 Rebuilt engine maintenance records. (a) The owner or operator may use a new maintenance record, without previous operating history, for an aircraft engine... 14 Aeronautics and Space 2 2011-01-01 2011-01-01 false Rebuilt engine maintenance records....

  2. 14 CFR 91.421 - Rebuilt engine maintenance records.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ..., Preventive Maintenance, and Alterations § 91.421 Rebuilt engine maintenance records. (a) The owner or operator may use a new maintenance record, without previous operating history, for an aircraft engine... 14 Aeronautics and Space 2 2012-01-01 2012-01-01 false Rebuilt engine maintenance records....

  3. 77 FR 67584 - Air Carrier Contract Maintenance Requirements

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-11-13

    ...ensure consistency between contract and in-house air carrier maintenance and enhance the...maintenance has evolved from mostly an ``in-house'' operation to an extended network of...maintenance manuals often are geared toward in-house maintenance. They fail to provide...

  4. 14 CFR 183.27 - Designated aircraft maintenance inspectors.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... 14 Aeronautics and Space 3 2012-01-01 2012-01-01 false Designated aircraft maintenance inspectors...: Privileges § 183.27 Designated aircraft maintenance inspectors. A designated aircraft maintenance inspector (DAMI) may approve maintenance on civil aircraft used by United States military flying clubs in...

  5. 14 CFR 183.27 - Designated aircraft maintenance inspectors.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 14 Aeronautics and Space 3 2010-01-01 2010-01-01 false Designated aircraft maintenance inspectors...: Privileges § 183.27 Designated aircraft maintenance inspectors. A designated aircraft maintenance inspector (DAMI) may approve maintenance on civil aircraft used by United States military flying clubs in...

  6. 14 CFR 183.27 - Designated aircraft maintenance inspectors.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... 14 Aeronautics and Space 3 2013-01-01 2013-01-01 false Designated aircraft maintenance inspectors...: Privileges § 183.27 Designated aircraft maintenance inspectors. A designated aircraft maintenance inspector (DAMI) may approve maintenance on civil aircraft used by United States military flying clubs in...

  7. 14 CFR 183.27 - Designated aircraft maintenance inspectors.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... 14 Aeronautics and Space 3 2011-01-01 2011-01-01 false Designated aircraft maintenance inspectors...: Privileges § 183.27 Designated aircraft maintenance inspectors. A designated aircraft maintenance inspector (DAMI) may approve maintenance on civil aircraft used by United States military flying clubs in...

  8. 14 CFR 183.27 - Designated aircraft maintenance inspectors.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... 14 Aeronautics and Space 3 2014-01-01 2014-01-01 false Designated aircraft maintenance inspectors...: Privileges § 183.27 Designated aircraft maintenance inspectors. A designated aircraft maintenance inspector (DAMI) may approve maintenance on civil aircraft used by United States military flying clubs in...

  9. Characterizing Software Maintenance Categories Using the Linux Kernel

    E-print Network

    Feitelson, Dror

    Characterizing Software Maintenance Categories Using the Linux Kernel Ayelet Israeli Dror G than 800 releases of the Linux kernel that have been made since 1994. The Linux release scheme--Perfective maintenance, Corrective mainte- nance, Adaptive maintenance, Linux kernel I. INTRODUCTION Software maintenance

  10. 25 CFR 170.812 - What is emergency maintenance?

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ... 25 Indians 1 2011-04-01 2011-04-01 false What is emergency maintenance? 170.812 Section 170.812 Indians BUREAU OF INDIAN AFFAIRS, DEPARTMENT OF THE INTERIOR LAND AND WATER INDIAN RESERVATION ROADS PROGRAM BIA Road Maintenance § 170.812 What is emergency maintenance? Emergency maintenance is work that must be accomplished immediately because...

  11. 20 CFR 702.507 - Vocational rehabilitation; maintenance allowance.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ... 20 Employees' Benefits 3 2011-04-01 2011-04-01 false Vocational rehabilitation; maintenance... PROCEDURE Vocational Rehabilitation § 702.507 Vocational rehabilitation; maintenance allowance. (a) An... maintenance allowance. A maintenance allowance shall be terminated when it is shown to the satisfaction of...

  12. 20 CFR 702.507 - Vocational rehabilitation; maintenance allowance.

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ... 20 Employees' Benefits 4 2012-04-01 2012-04-01 false Vocational rehabilitation; maintenance... PROCEDURE Vocational Rehabilitation § 702.507 Vocational rehabilitation; maintenance allowance. (a) An... maintenance allowance. A maintenance allowance shall be terminated when it is shown to the satisfaction of...

  13. 20 CFR 702.507 - Vocational rehabilitation; maintenance allowance.

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ... 20 Employees' Benefits 4 2014-04-01 2014-04-01 false Vocational rehabilitation; maintenance... PROCEDURE Vocational Rehabilitation § 702.507 Vocational rehabilitation; maintenance allowance. (a) An... maintenance allowance. A maintenance allowance shall be terminated when it is shown to the satisfaction of...

  14. 20 CFR 702.507 - Vocational rehabilitation; maintenance allowance.

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ... 20 Employees' Benefits 4 2013-04-01 2013-04-01 false Vocational rehabilitation; maintenance... PROCEDURE Vocational Rehabilitation § 702.507 Vocational rehabilitation; maintenance allowance. (a) An... maintenance allowance. A maintenance allowance shall be terminated when it is shown to the satisfaction of...

  15. The Role of Automatic Negative Reinforcement in Clinical Problems

    ERIC Educational Resources Information Center

    Miltenberger, Raymond G.

    2005-01-01

    This paper discusses the role of automatic negative reinforcement in the maintenance of clinical problems. Following a brief introduction to the functional conceptualization of clinical problems and discussion of four classes of reinforcement maintaining clinical problems, the paper suggests that automatic negative reinforcement is an understudied…

  16. The Effect of Line Maintenance Activity on Airline Safety Quality

    NASA Technical Reports Server (NTRS)

    Rhoades, Dawna L.; Reynolds, Rosemarie; Waguespack, Blaise, Jr.; Williams, Michael

    2005-01-01

    One of the arguments against deregulation of the airline industry has been the possibility that financially troubled carriers would be tempted to lower line maintenance spending, thus lowering maintenance quality and decreasing the overall safety of the carrier. Given the financial crisis triggered by the events of 9/11: it appears to be a good time to revisit this issue. This paper examines the quality of airline line maintenance activity and examines the impact of maintenance spending on maintenance quality and overall safety. Findings indicate that increased maintenance spending is associated with increased line maintenance activity and increased overall safety quality for the major U.S. carriers.

  17. AUTOMOTIVE DIESEL MAINTENANCE 1. UNIT XX, CUMMINS DIESEL ENGINE, MAINTENANCE SUMMARY.

    ERIC Educational Resources Information Center

    Minnesota State Dept. of Education, St. Paul. Div. of Vocational and Technical Education.

    THIS MODULE OF A 30-MODULE COURSE IS DESIGNED TO PROVIDE A SUMMARY OF THE REASONS AND PROCEDURES FOR DIESEL ENGINE MAINTENANCE. TOPICS ARE WHAT ENGINE BREAK-IN MEANS, ENGINE BREAK-IN, TORQUING BEARINGS (TEMPLATE METHOD), AND THE NEED FOR MAINTENANCE. THE MODULE CONSISTS OF A SELF-INSTRUCTIONAL BRANCH PROGRAMED TRAINING FILM "CUMMINS DIESEL ENGINE…

  18. 47 CFR 80.1074 - Radio maintenance personnel for at-sea maintenance.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 47 Telecommunication 5 2010-10-01 2010-10-01 false Radio maintenance personnel for at-sea maintenance. 80.1074 Section 80.1074 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) SAFETY AND SPECIAL RADIO SERVICES STATIONS IN THE MARITIME SERVICES Global Maritime Distress and...

  19. 47 CFR 80.1074 - Radio maintenance personnel for at-sea maintenance.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 47 Telecommunication 5 2011-10-01 2011-10-01 false Radio maintenance personnel for at-sea maintenance. 80.1074 Section 80.1074 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) SAFETY AND SPECIAL RADIO SERVICES STATIONS IN THE MARITIME SERVICES Global Maritime Distress and Safety System (GMDSS) General Provisions § 80.1074...

  20. 75 FR 37457 - Maintenance Wage Rate Wage Recommendation and Maintenance Wage Survey; Report of Additional...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-06-29

    ...or adopt prevailing wage rates for maintenance laborers and mechanics, and to approve or refer to the U.S. Department of Labor...or adopt prevailing wage rates for maintenance laborers and mechanics, and to approve or refer to the U.S. Department of...

  1. 75 FR 4099 - Maintenance Wage Rate Wage Recommendation and Maintenance Wage Survey; Report of Additional...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-01-26

    ...or adopt prevailing wage rates for maintenance laborers and mechanics, and to approve or refer to the U.S. Department of Labor...or adopt prevailing wage rates for maintenance laborers and mechanics, and to approve or refer to the U.S. Department of...

  2. Multiple Mechanisms Contribute To Telomere Maintenance

    PubMed Central

    Morrish, Tammy A.; Bekbolysnov, Dulat; Velliquette, David; Morgan, Michelle; Ross, Bryan; Wang, Yongheng; Chaney, Benjamin; McQuigg, Jessica; Fager, Nathan; Maine, Ira P.

    2014-01-01

    The unlimited growth potential of tumors depends on telomere maintenance and typically depends on telomerase, an RNA-dependent DNA polymerase, which reverse transcribes the telomerase RNA template, synthesizing telomere repeats at the ends of chromosomes. Studies in various model organisms genetically deleted for telomerase indicate that several recombination-based mechanisms also contribute to telomere maintenance. Understanding the molecular basis of these mechanisms is critical since some human tumors form without telomerase, yet the sequence is maintained at the telomeres. Recombination-based mechanisms also likely contribute at some frequency to telomere maintenance in tumors expressing telomerase. Preventing telomere maintenance is predicted to impact tumor growth, yet inhibiting telomerase may select for the recombination-based mechanisms. Telomere recombination mechanisms likely involve altered or unregulated pathways of DNA repair. The use of some DNA damaging agents may encourage the use of these unregulated pathways of DNA repair to be utilized and may allow some tumors to generate resistance to these agents depending on which repair pathways are altered in the tumors. This review will discuss the various telomere recombination mechanisms and will provide rationale regarding the possibility that L1 retrotransposition may contribute to telomere maintenance in tumors lacking telomerase. PMID:25285314

  3. 43 CFR 3830.20 - Payment of service charges, location fees, initial maintenance fees, annual maintenance fees and...

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 43 Public Lands: Interior 2 2013-10-01 2013-10-01 false Payment of service charges, location fees, initial maintenance fees, annual maintenance fees and oil shale fees. 3830.20 Section 3830.20 Public Lands..., initial maintenance fees, annual maintenance fees and oil shale fees....

  4. 43 CFR 3830.20 - Payment of service charges, location fees, initial maintenance fees, annual maintenance fees and...

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 43 Public Lands: Interior 2 2014-10-01 2014-10-01 false Payment of service charges, location fees, initial maintenance fees, annual maintenance fees and oil shale fees. 3830.20 Section 3830.20 Public Lands..., initial maintenance fees, annual maintenance fees and oil shale fees....

  5. 43 CFR 3830.20 - Payment of service charges, location fees, initial maintenance fees, annual maintenance fees and...

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 43 Public Lands: Interior 2 2011-10-01 2011-10-01 false Payment of service charges, location fees, initial maintenance fees, annual maintenance fees and oil shale fees. 3830.20 Section 3830.20 Public Lands..., initial maintenance fees, annual maintenance fees and oil shale fees....

  6. 43 CFR 3830.20 - Payment of service charges, location fees, initial maintenance fees, annual maintenance fees and...

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 43 Public Lands: Interior 2 2012-10-01 2012-10-01 false Payment of service charges, location fees, initial maintenance fees, annual maintenance fees and oil shale fees. 3830.20 Section 3830.20 Public Lands..., initial maintenance fees, annual maintenance fees and oil shale fees....

  7. Crew interface specifications development for inflight maintenance and stowage functions

    NASA Technical Reports Server (NTRS)

    Carl, J. G.

    1974-01-01

    Findings and data products developed during crew specification study for inflight maintenance and stowage functions are reported. From this information base, a family of data concepts to support crew inflight troubleshooting and corrective maintenance activities was developed and specified. Recommendations are made for the improvement of inflight maintenance planning, preparations and operations in future space flight programs through the establishment of an inflight maintenance organization and specific suggestions for techniques to improve the management of the inflight maintenance function.

  8. Issue resolution for conceptual design using AHP

    NASA Astrophysics Data System (ADS)

    Lin, Yu-Jen; Huang, Cheng-Wei; Tseng, Ju-Ching; Shiau, Jiun-Yan

    2004-11-01

    This paper presents a methodology for issue resolution in conceptual design. Conceptual design is the preliminary phase of design in which both well-defined problem specifications and high level design solutions are developed. It has been shown that eighty five percent of the lifecycle costs are determined during the conceptual design phase in the development of a product. Generally there are three modules: problem definition, issue resolution, and conceptual formation in the architecture of conceptual design. Problem definition generates a problem description, a set of requirements, and/or a set of design constraints. After the problem is defined, consultation with professionals may be necessary to find out the actual corresponding issues for the design. A more objective approach for convincing participators of the correctness of the chosen issues is to use data. After the design issues are identified the conflicts among them need to be resolved in the issue resolution module. The proposed approach provides a methodology for designers to determine the solutions to the appropriate issues that fit in with the problem definition and improves the efficiency of conceptual design process. It is based on an intuitively appealing methodology, the analytic hierarchy process (AHP). Our approach has been applied to magnesium alloys industry for the conceptual design of WIP containers. The conflicts among the identified issues are resolved successfully after applying it. The real world case demonstrates the practicability and efficiency of the proposed methodology.

  9. Current-oriented swimming by jellyfish and its role in bloom maintenance.

    PubMed

    Fossette, Sabrina; Gleiss, Adrian Christopher; Chalumeau, Julien; Bastian, Thomas; Armstrong, Claire Denise; Vandenabeele, Sylvie; Karpytchev, Mikhail; Hays, Graeme Clive

    2015-02-01

    Cross-flows (winds or currents) affect animal movements [1-3]. Animals can temporarily be carried off course or permanently carried away from their preferred habitat by drift depending on their own traveling speed in relation to that of the flow [1]. Animals able to only weakly fly or swim will be the most impacted (e.g., [4]). To circumvent this problem, animals must be able to detect the effects of flow on their movements and respond to it [1, 2]. Here, we show that a weakly swimming organism, the jellyfish Rhizostoma octopus, can orientate its movements with respect to currents and that this behavior is key to the maintenance of blooms and essential to reduce the probability of stranding. We combined in situ observations with first-time deployment of accelerometers on free-ranging jellyfish and simulated the behavior observed in wild jellyfish within a high-resolution hydrodynamic model. Our results show that jellyfish can actively swim countercurrent in response to current drift, leading to significant life-history benefits, i.e., increased chance of survival and facilitated bloom formation. Current-oriented swimming may be achieved by jellyfish either directly detecting current shear across their body surface [5] or indirectly assessing drift direction using other cues (e.g., magnetic, infrasound). Our coupled behavioral-hydrodynamic model provides new evidence that current-oriented swimming contributes to jellyfish being able to form aggregations of hundreds to millions of individuals for up to several months, which may have substantial ecosystem and socioeconomic consequences [6, 7]. It also contributes to improve predictions of jellyfish blooms' magnitude and movements in coastal waters. PMID:25619761

  10. Guidance for UMTRA project surveillance and maintenance

    SciTech Connect

    1986-01-01

    The Guidance for UMTRA Project Surveillance and Maintenance describes the procedures that will be used to verify that Uranium Mill Tailings Remedial Action (UMTRA) Project disposal sites continue to function as designed. The approach of this guidance document is to identify surveillance requirements and maintenance procedures that will be used to comply with NRC license requirements. This document addresses five primary activities: Definition and characterization of final site conditions. Site inspections; Ground-water monitoring; Aerial photography; and Custodial maintenance and contingency repair. Final site conditions will be defined and characterized prior to the completion of remedial actions at a site. As-built drawings will be compiled, a final topographic survey will be performed, a vicinity map will be prepared, and ground and aerial photographs will be taken. Survey monuments, site markers, and signs will be established as will a network of monitoring wells.

  11. Flight control electronics reliability/maintenance study

    NASA Technical Reports Server (NTRS)

    Dade, W. W.; Edwards, R. H.; Katt, G. T.; Mcclellan, K. L.; Shomber, H. A.

    1977-01-01

    Collection and analysis of data are reported that concern the reliability and maintenance experience of flight control system electronics currently in use on passenger carrying jet aircraft. Two airlines B-747 airplane fleets were analyzed to assess the component reliability, system functional reliability, and achieved availability of the CAT II configuration flight control system. Also assessed were the costs generated by this system in the categories of spare equipment, schedule irregularity, and line and shop maintenance. The results indicate that although there is a marked difference in the geographic location and route pattern between the airlines studied, there is a close similarity in the reliability and the maintenance costs associated with the flight control electronics.

  12. Concepts for space maintenance of OTV engines

    NASA Technical Reports Server (NTRS)

    Martinez, A.; Hines, B. D.; Erickson, C. M.

    1986-01-01

    Concepts for space maintainability of OTV engines are examined. The advanced efforts are based on work recently completed for NASA Lewis Research Center Space Propulsion Technology Division. An engine design is developed which is driven by space maintenance requirements and by a failure modes and effects analysis. Modularity within the engine is shown to offer cost benefits and improved space maintenance capabilities. Space-operable disconnects are conceptualized for both engine change-out and for module replacement. Through FME mitigation the modules are conceptualized to contain the most often replaced engine components. A preliminary space maintenance plan is developed around a controls and condition monitoring system using advanced sensors, controls, and conditioning monitoring concepts.

  13. Physics of the Earth and Planetary Interiors 140 (2003) 159167 On the resolution of density within the Earth

    E-print Network

    Laske, Gabi

    2003-01-01

    Physics of the Earth and Planetary Interiors 140 (2003) 159­167 On the resolution of density within 30 years have passed since the last publication of a linear resolution calculation of density inside) the density jump at the inner-core boundary which is important in discussions of the maintenance

  14. Question 2: Dispute resolution

    SciTech Connect

    Bissell, K.; Blake, M.J.; Boucher, P.G.; Gordon, K.; Miller, D.J.; Nelson, S.L.; Norling, N.M.; Sandstrom, D.V.; Smith, W.H.; Steinmeier, W.D.; Urwiller, D.G.; Wilk, G.M.; Worthy, P.M.

    1990-11-08

    This article is a collection of editorials of public service commissioners addressing their commission's involvement in dispute resolution and policy making, the effect of 'sunshine' or due process rules on the relationships between commissioners and staff, and proposals or experience related to alternative dispute resolution or formulation of policy.

  15. Temporal Resolution [Loop Search

    E-print Network

    Fisher, Michael

    perform the following steps. 1. Transform A into SNF, giving a set of clauses AS. 2. Perform step Logic [TEMPORAL RESOLUTION: LOOP SEARCH] ­ p.2/24 #12;Merged SNF To apply the temporal resolution rule, it is often convenient to combine one or more step clauses. Consequently, a variant on SNF called merged-SNF

  16. Temporal Resolution [Normal Form

    E-print Network

    Fisher, Michael

    Michael Fisher An Introduction to Practical Formal Methods Using Temporal Logic [TEMPORAL RESOLUTION: SNF] ­ p.1/20 Recap: SNF As in classical resolution, PTL formulae are transformed into a clausal form; in our case SNF: i Ci where each PTL-clause, Ci , is in one of the following forms: start c lc (an

  17. Temporal Resolution [Normal Form

    E-print Network

    Fisher, Michael

    Michael Fisher An Introduction to Practical Formal Methods Using Temporal Logic [TEMPORAL RESOLUTION: SNF] ­ p.1/20 #12;Recap: SNF As in classical resolution, PTL formulae are transformed into a clausal form; in our case SNF: i Ci where each PTL-clause, Ci , is in one of the following forms: start c lc (an

  18. Optimal Discretization Resolution in Algebraic Image Reconstruction

    NASA Astrophysics Data System (ADS)

    Sharif, Behzad; Kamalabadi, Farzad

    2005-11-01

    In this paper, we focus on data-limited tomographic imaging problems where the underlying linear inverse problem is ill-posed. A typical regularized reconstruction algorithm uses algebraic formulation with a predetermined discretization resolution. If the selected resolution is too low, we may loose useful details of the underlying image and if it is too high, the reconstruction will be unstable and the representation will fit irrelevant features. In this work, two approaches are introduced to address this issue. The first approach is using Mallow's CL method or generalized cross-validation. For each of the two methods, a joint estimator of regularization parameter and discretization resolution is proposed and their asymptotic optimality is investigated. The second approach is a Bayesian estimator of the model order using a complexity-penalizing prior. Numerical experiments focus on a space imaging application from a set of limited-angle tomographic observations.

  19. Nurses' Resolutions of Six Ethical Dilemmas.

    ERIC Educational Resources Information Center

    Lawrence, Jeanette A.; Crisham, Patricia

    Six ethical dilemmas related to nursing practice were developed and presented to registered and trainee nurses for their resolution. A non-nurse group of university students also gave decisions about what a nurse should do in each ethically-loaded situation. A dilemma was classified as recurrent if its core problem was spontaneously mentioned by…

  20. Problem drinkers and their problems

    PubMed Central

    Buchan, I. C.; Buckley, E. G.; Deacon, G. L. S.; Irvine, R.; Ryan, M. P.

    1981-01-01

    From general practice records of 9,763 patients, 106 problem drinkers were compared with a control group. The drinkers had a substantially higher number of problems and they consulted their doctor and attended casualty departments frequently. Social and marital problems were especially prevalent in the families of problem drinkers. PMID:7277292

  1. CREW CHIEF: A computer graphics simulation of an aircraft maintenance technician

    NASA Technical Reports Server (NTRS)

    Aume, Nilss M.

    1990-01-01

    Approximately 35 percent of the lifetime cost of a military system is spent for maintenance. Excessive repair time is caused by not considering maintenance during design. Problems are usually discovered only after a mock-up has been constructed, when it is too late to make changes. CREW CHIEF will reduce the incidence of such problems by catching design defects in the early design stages. CREW CHIEF is a computer graphic human factors evaluation system interfaced to commercial computer aided design (CAD) systems. It creates a three dimensional man model, either male or female, large or small, with various types of clothing and in several postures. It can perform analyses for physical accessibility, strength capability with tools, visual access, and strength capability for manual materials handling. The designer would produce a drawing on his CAD system and introduce CREW CHIEF in it. CREW CHIEF's analyses would then indicate places where problems could be foreseen and corrected before the design is frozen.

  2. TPX in-vessel remote maintenance tooling

    SciTech Connect

    Rennich, M.J.; Silke, G.W.

    1995-12-31

    The Tokamak Physics Experiment (TPX) has used the lessons learned from successful remote maintenance and remote handling facilities to develop both a concept and philosophy for incorporation of remote design from the earliest phases of the project. Initiation of mockup testing during the conceptual design phase leads to significant improvements in the basic maintenance equipment configuration. In addition, remote handling features and capabilities have been incorporated into the design of the plasma-facing components (PFCs) as part of the total PFC design effort.

  3. Navy composite maintenance and repair experience

    NASA Technical Reports Server (NTRS)

    Donnellan, T. M.; Cochran, R. C.; Rosenzweig, E. L.; Trabocco, R. E.

    1992-01-01

    The Navy has been a strong proponent of composites for aircraft structure. Fleet use of composites started with the F-14 in the early 1970's and has steadily increased. This experience base provides sufficient information to allow an evaluation of the maintenance performance of polymer composites in service. A summary is presented of the Navy's experience with maintenance of composite structure. The general types of damage experienced in the fleet as well as specific examples of composite damage to aircraft is described. The impact of future designs on supportability is also discussed.

  4. Effective Implementation of Reliability Centered Maintenance

    NASA Astrophysics Data System (ADS)

    Nabhan, M. Bassam

    2010-06-01

    This article is intended to guide industry to effective implementation of Reliability Centered Maintenance (RCM) by identifying the pitfalls to avoid, by introducing new concepts that make RCM simple, by discussing the uncomplicated tools needed to commence the RCM analysis, by explaining the step-by-step RCM implementation logic process with actual real life examples, and the step-by-step explanation of the preventive maintenance (PM) strategies, by explaining how to establish an RCM living program, by explaining how to monitor and trend performance of the RCM program. Finally by knowing when the optimum balance point of the RCM efforts have been a chieved.

  5. Accelerated learning approaches for maintenance training

    SciTech Connect

    Erickson, E.J.

    1991-01-01

    As a training tool, Accelerated Learning techniques have been in use since 1956. Trainers from a variety of applications and disciplines have found success in using Accelerated Learning approaches, such as training aids, positive affirmations, memory aids, room arrangement, color patterns, and music. Some have thought that maintenance training and Accelerated Learning have nothing in common. Recent training applications by industry and education of Accelerated Learning are proving very successful by several standards. This paper cites available resource examples and challenges maintenance trainers to adopt new ideas and concepts to accelerate learning in all training setting. 7 refs.

  6. High-resolution digital teleradiology: a perspective.

    PubMed

    Kuduvalli, G R; Rangayyan, R M; Desautels, J E

    1991-11-01

    Teleradiology has come a long way, from analog transmission systems using slow-scan television over standard telephone lines, to present-day, commercially available, microcomputer-based, low-resolution teleradiology systems. However, there exists a need to address the high-resolution end of the medical imaging categories, namely chest radiographs and mammograms, to firmly establish teleradiology. The availability of high-resolution image digitizers, display units, and digital hard copiers has made high-resolution digital teleradiology a feasible concept. Although the use of satellite channels can speed up the transmission of radiographic image data, with widespread acceptance of high-resolution teleradiology systems in the foreseeable future, the sheer amount of data involved in this field will give rise to problems of data transmission and storage. Data compression schemes can bring down the amount of data handled and can have a great economic impact on future teleradiology systems. We have developed a number of compression techniques for reversible compression of medical images. Our experiments have shown that lossless compression of the order of 4:1 is possible for a class of high-resolution medical images. Use of pattern recognition techniques offers the potential to bring down these data rates even further. We plan to use these techniques in a prototype high-resolution teleradiology system being developed. In this paper, we trace some of the developments in teleradiology and image data compression, and present a perspective for teleradiology in the 1990s. PMID:1772919

  7. Planification de la maintenance d'un parc de turbines-alternateurs par programmation mathematique

    NASA Astrophysics Data System (ADS)

    Aoudjit, Hakim

    A growing number of Hydro-Quebec's hydro generators are at the end of their useful life and maintenance managers fear to face a number of overhauls exceeding what can be handled. Maintenance crews and budgets are limited and these withdrawals may take up to a full year and mobilize significant resources in addition to the loss of electricity production. In addition, increased export sales forecasts and severe production patterns are expected to speed up wear that can lead to halting many units at the same time. Currently, expert judgment is at the heart of withdrawals which rely primarily on periodic inspections and in-situ measurements and the results are sent to the maintenance planning team who coordinate all the withdrawals decisions. The degradations phenomena taking place is random in nature and the prediction capability of wear using only inspections is limited to short-term at best. A long term planning of major overhauls is sought by managers for the sake of justifying and rationalizing budgets and resources. The maintenance managers are able to provide a huge amount of data. Among them, is the hourly production of each unit for several years, the repairs history on each part of a unit as well as major withdrawals since the 1950's. In this research, we tackle the problem of long term maintenance planning for a fleet of 90 hydro generators at Hydro-Quebec over a 50 years planning horizon period. We lay a scientific and rational framework to support withdrawals decisions by using part of the available data and maintenance history while fulfilling a set of technical and economic constraints. We propose a planning approach based on a constrained optimization framework. We begin by decomposing and sorting hydro generator components to highlight the most influential parts. A failure rate model is developed to take into account the technical characteristics and unit utilization. Then, replacement and repair policies are evaluated for each of the components then strategies are derived for the whole unit. Traditional univariate policies such as the age replacement policy and the minimal repair policy are calculated. These policies are extended to build alternative bivariate maintenance policy as well as a repair strategy where the state of a component after a repair is rejuvenated by a constant coefficient. These templates form the basis for the calculation of objective function for the scheduling problem. On one hand, this issue is treated as a nonlinear problem where the objective is to minimize the average total maintenance cost per unit of time on an infinite horizon for the fleet with technical and economic constraints. A formulation is also proposed in the case of a finite time horizon. In the event of electricity production variation, and given that the usage profile is known, the influence of production scenarios is reflected on the unit's components through their failure rate. In this context, prognoses on possible resources problems are made by studying the characteristics of the generated plans. On the second hand, the withdrawals are now subjected to two decision criteria. In addition to minimizing the average total maintenance cost per unit of time on an infinite time horizon, the best achievable reliability of remaining turbo generators is sought. This problem is treated as a biobjective nonlinear optimization problem. Finally a series of problems describing multiple contexts are solved for planning renovations of 90 turbo generators units considering 3 major components in each unit and 2 types of maintenance policies for each component.

  8. Intimate partner violence among individuals in methadone maintenance treatment

    PubMed Central

    de Dios, Marcel A.; Anderson, Bradley J.; Caviness, Celeste M.; Stein, Michael

    2013-01-01

    Background Intimate partner violence (IPV) is a highly prevalent and concerning problem among methadone maintenance populations, and previous studies have shown a relationship between a history of IPV and increased substance use and affective disturbances. Methods The current study examined 1) the association between recent IPV victimization and alcohol and cocaine use and 2) the relationship between recent IPV victimization and depression in a sample of smokers (n=203) in methadone maintenance treatment (MMT). Participants in this study completed a battery of assessments that included standard questionnaires of trauma, alcohol and substance use, and depression. Parallel logistic and linear regression models were used to estimate the adjusted association of IPV victimization and depressive symptoms and evaluate the adjusted association of victimization with recent substance use. Results Participants recently victimized by partners were shown to have significantly higher mean CES-D scores (b = 0.54, 95%CI 0.07; 1.02, p < .05) and were found to have a 6 times greater likelihood of cocaine use (OR = 6.65, 95%CI 1.61; 27.46, p < .01) after controlling for age, gender, education, opiate use and ethnicity. Conclusions These findings support the notion that IPV victimization can potentially increase depression and other substance use among MMT patients, which can have a deleterious impact on treatment. PMID:24821357

  9. Examining the Relationship Between Passenger Airline Aircraft Maintenance Outsourcing and Aircraft Safety

    NASA Astrophysics Data System (ADS)

    Monaghan, Kari L.

    The problem addressed was the concern for aircraft safety rates as they relate to the rate of maintenance outsourcing. Data gathered from 14 passenger airlines: AirTran, Alaska, America West, American, Continental, Delta, Frontier, Hawaiian, JetBlue, Midwest, Northwest, Southwest, United, and USAir covered the years 1996 through 2008. A quantitative correlational design, utilizing Pearson's correlation coefficient, and the coefficient of determination were used in the present study to measure the correlation between variables. Elements of passenger airline aircraft maintenance outsourcing and aircraft accidents, incidents, and pilot deviations within domestic passenger airline operations were analyzed, examined, and evaluated. Rates of maintenance outsourcing were analyzed to determine the association with accident, incident, and pilot deviation rates. Maintenance outsourcing rates used in the evaluation were the yearly dollar expenditure of passenger airlines for aircraft maintenance outsourcing as they relate to the total airline aircraft maintenance expenditures. Aircraft accident, incident, and pilot deviation rates used in the evaluation were the yearly number of accidents, incidents, and pilot deviations per miles flown. The Pearson r-values were calculated to measure the linear relationship strength between the variables. There were no statistically significant correlation findings for accidents, r(174)=0.065, p=0.393, and incidents, r(174)=0.020, p=0.793. However, there was a statistically significant correlation for pilot deviation rates, r(174)=0.204, p=0.007 thus indicating a statistically significant correlation between maintenance outsourcing rates and pilot deviation rates. The calculated R square value of 0.042 represents the variance that can be accounted for in aircraft pilot deviation rates by examining the variance in aircraft maintenance outsourcing rates; accordingly, 95.8% of the variance is unexplained. Suggestions for future research include replication of the present study with the inclusion of maintenance outsourcing rate data for all airlines differentiated between domestic and foreign repair station utilization. Replication of the present study every five years is also encouraged to continue evaluating the impact of maintenance outsourcing practices on passenger airline safety.

  10. Walking Problems

    MedlinePLUS

    ... get around, and exercise. Having a problem with walking can make daily life more difficult. The pattern ... an abnormal gait and lead to problems with walking. These include: Injuries, diseases, or abnormal development of ...

  11. Sleeping Problems

    MedlinePLUS

    ... asthma, arthritis or heart failure Medicines and certain foods or drinks back to top Why Is It Important to Get Help? Poor sleep can slow your loved one’s recovery. Sleep problems can lead to depression, memory problems ...

  12. Erection problems

    MedlinePLUS

    ... may include: Taking your blood pressure Examining your penis and rectum to check for problems Your doctor ... check for normal nighttime erections Ultrasound of your penis to check for blood flow problems Rigidity monitoring ...

  13. Joint Problems

    MedlinePLUS

    ... ankles and toes. Other types of arthritis include gout or pseudogout. Sometimes, there is a mechanical problem ... for more information on osteoarthritis, rheumatoid arthritis and gout. How Common are Joint Problems? Osteoarthritis, which affects ...

  14. Solving the 10 Most Common Carpet Problems.

    ERIC Educational Resources Information Center

    Hilton, Michael

    1998-01-01

    Identifies the 10 most common carpet problems in school facilities and offers solutions. These include: transition areas, moisture, spot removal, recurring spots, cleaning agents, allergens, wicking, biological contamination, equipment selection, and cleaning methods. Ensuring a successful maintenance program results in satisfactory appearance,…

  15. Super resolution fluorescence microscopy

    PubMed Central

    Huang, Bo; Bates, Mark; Zhuang, Xiaowei

    2010-01-01

    Achieving a spatial resolution that is not limited by the diffraction of light, recent developments of super-resolution fluorescence microscopy techniques allow the observation of many biological structures not resolvable in conventional fluorescence microscopy. New advances in these techniques now give them the ability to image three-dimensional (3D) structures, measure interactions by multicolor colocalization, and record dynamic processes in living cells at the nanometer scale. It is anticipated that super-resolution fluorescence microscopy will become a widely used tool for cell and tissue imaging to provide previously unobserved details of biological structures and processes. PMID:19489737

  16. Maintenance Downtime Thursday, November 5, 2015

    Atmospheric Science Data Center

    2015-11-04

    Date(s):  Thursday, November 5, 2015 Time:  08:00 am - 12:00 pm EST Event ... ASDC will be undergoing scheduled maintenance Thursday, 11/5 from 8am - 12pm. Data processing and distribution may be impacted during ...

  17. Maintenance optimization plan for essential equipment reliability

    SciTech Connect

    Steffen, D.H.

    1996-02-01

    The Maintenance Optimization Plan (MOP) for Essential Equipment Reliability will furnish Tank Waste Remediation System (TWRS) management with a pro-active, forward-thinking process for maintaining essential structures, systems, and components (ESSC) at the Hanford Site tank farms in their designed condition, and to ensure optimum ESSC availability and reliability.

  18. 24 CFR 266.507 - Maintenance requirements.

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ... HOUSING FINANCE AGENCY RISK-SHARING PROGRAM FOR INSURED AFFORDABLE MULTIFAMILY PROJECT LOANS Project Management and Servicing § 266.507 Maintenance requirements. The mortgagor must maintain the project in accordance with the physical condition standards in 24 CFR part 5, subpart G....

  19. 24 CFR 266.507 - Maintenance requirements.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... HOUSING FINANCE AGENCY RISK-SHARING PROGRAM FOR INSURED AFFORDABLE MULTIFAMILY PROJECT LOANS Project Management and Servicing § 266.507 Maintenance requirements. The mortgagor must maintain the project in accordance with the physical condition standards in 24 CFR part 5, subpart G....

  20. 24 CFR 266.507 - Maintenance requirements.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ... HOUSING FINANCE AGENCY RISK-SHARING PROGRAM FOR INSURED AFFORDABLE MULTIFAMILY PROJECT LOANS Project Management and Servicing § 266.507 Maintenance requirements. The mortgagor must maintain the project in accordance with the physical condition standards in 24 CFR part 5, subpart G....

  1. 24 CFR 266.507 - Maintenance requirements.

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ... HOUSING FINANCE AGENCY RISK-SHARING PROGRAM FOR INSURED AFFORDABLE MULTIFAMILY PROJECT LOANS Project Management and Servicing § 266.507 Maintenance requirements. The mortgagor must maintain the project in accordance with the physical condition standards in 24 CFR part 5, subpart G....

  2. 24 CFR 266.507 - Maintenance requirements.

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ... HOUSING FINANCE AGENCY RISK-SHARING PROGRAM FOR INSURED AFFORDABLE MULTIFAMILY PROJECT LOANS Project Management and Servicing § 266.507 Maintenance requirements. The mortgagor must maintain the project in accordance with the physical condition standards in 24 CFR part 5, subpart G....

  3. Bus Maintenance is a Sound Investment.

    ERIC Educational Resources Information Center

    American School Board Journal, 1981

    1981-01-01

    Preventive school bus maintenance to reduce long-term costs should include daily visual inspections by drivers, frequent checks by mechanics, and comprehensive inspections every 5,000 miles. Mechanics recommend checking tail lights, batteries, brakes, lug nuts, leaf springs, tail pipes, and exhaust pipe hangers. (RW)

  4. Project Surveillance and Maintenance Plan. [UMTRA Project

    SciTech Connect

    Not Available

    1985-09-01

    The Project Surveillance and Maintenance Plan (PSMP) describes the procedures that will be used by the US Department of Energy (DOE), or other agency as designated by the President to verify that inactive uranium tailings disposal facilities remain in compliance with licensing requirements and US Environmental Protection Agency (EPA) standards for remedial actions. The PSMP will be used as a guide for the development of individual Site Surveillance and Maintenance Plans (part of a license application) for each of the UMTRA Project sites. The PSMP is not intended to provide minimum requirements but rather to provide guidance in the selection of surveillance measures. For example, the plan acknowledges that ground-water monitoring may or may not be required and provides the (guidance) to make this decision. The Site Surveillance and Maintenance Plans (SSMPs) will form the basis for the licensing of the long-term surveillance and maintenance of each UMTRA Project site by the NRC. Therefore, the PSMP is a key milestone in the licensing process of all UMTRA Project sites. The Project Licensing Plan (DOE, 1984a) describes the licensing process. 11 refs., 22 figs., 8 tabs.

  5. Higher Education Vertical Infrastructure Maintenance Planning.

    ERIC Educational Resources Information Center

    Weidner, Theodore J.

    To assist higher education facility officers in documenting their financial needs for renewing and renovating existing physical facilities, this study examined the accuracy against observed conditions of the tools used to identify vertical infrastructure maintenance needs in a large public university. Data developed for U.S. Army facilities is…

  6. Maintenance Commitments and Goals Pankaj R. Telang

    E-print Network

    Young, R. Michael

    are an airline operator (oper), an aircraft engine manufacturer (mfr), and a engine parts manufacturer (pmfr). Operator Engine Mfr Parts Mfr Operate Aircraft Monitor Engine Health Request Maintenance Pull Aircraft a series of achievement goals to service the aircraft engine herself. She may act on those goals herself

  7. Business Machine Maintenance. Performance Objectives. Intermediate Course.

    ERIC Educational Resources Information Center

    McMinn, Robert

    Several intermediate performance objectives and corresponding criterion measures are listed for each of 28 terminal objectives presented in this guide for an intermediate business machine maintenance course at the secondary level. (For the basic course guide see CE 010 949.) Titles of the 28 terminal objective sections are Career Opportunities,…

  8. Isolation and laboratory maintenance of Treponema pallidum.

    PubMed

    Lukehart, Sheila A; Marra, Christina M

    2007-11-01

    The spirochetal bacteria that cause syphilis, yaws, and bejel cannot be cultivated in vitro. This unit describes methods for the isolation of subspecies of Treponema pallidum and other pathogenic treponemes from clinical specimens, the propagation of these isolates in rabbits, isolation of clonal populations of T. pallidum, and techniques for maintenance of frozen stocks of these treponemes. PMID:18770607

  9. Epigenetic Regulation of Memory Formation and Maintenance

    ERIC Educational Resources Information Center

    Zovkic, Iva B.; Guzman-Karlsson, Mikael C.; Sweatt, J. David

    2013-01-01

    Understanding the cellular and molecular mechanisms underlying the formation and maintenance of memories is a central goal of the neuroscience community. It is well regarded that an organism's ability to lastingly adapt its behavior in response to a transient environmental stimulus relies on the central nervous system's capability for structural…

  10. 40 CFR 86.1725-99 - Maintenance.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... 40 Protection of Environment 20 2012-07-01 2012-07-01 false Maintenance. 86.1725-99 Section 86.1725-99 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR PROGRAMS (CONTINUED) CONTROL OF EMISSIONS FROM NEW AND IN-USE HIGHWAY VEHICLES AND ENGINES (CONTINUED) General Provisions for the Voluntary National Low Emission...

  11. Davis PV plant operation and maintenance manual

    SciTech Connect

    1994-09-01

    This operation and maintenance manual contains the information necessary to run the Photovoltaics for Utility Scale Applications (PVUSA) test facility in Davis, California. References to more specific information available in drawings, data sheets, files, or vendor manuals are included. The PVUSA is a national cooperative research and demonstration program formed in 1987 to assess the potential of utility scale photovoltaic systems.

  12. A process for risk-focused maintenance

    SciTech Connect

    Lofgren, E.V.; Cooper, S.E.; Kurth, R.E.; Phillips, L.B. )

    1991-03-01

    This report presents a process for focusing maintenance resources on components that enable nuclear plant systems to perform their essential functions and on components whose failure may initiate challenges to safety systems, so as to have the greatest impact in decreasing risk. The process provides criteria, based on risk, for deciding which components are critical to risk and determining what maintenance activities are required to ensure reliable operation of those risk-critical components. Two approaches are provided for selection of risk-critical components. One approach uses the results of a Probabilistic Risk Assessment (PRA); the other is based on the methodology developed for this report, which has a basis in PRA although it does not use the results of a PRA study. Following identification of risk-critical components, both approaches use a single methodology for determining what maintenance activities are required to ensure reliable operation of the identified components. The report also provides demonstrations of application of the two approaches to selection of risk-critical components and demonstrations of application of the methodology for determining what maintenance activities are required to an active standby safety system, a normally operating system, and passive components. 5 refs., 11 figs., 1 tab.

  13. Portfolio of Potential Strategies in Aeronautic Maintenance

    NASA Astrophysics Data System (ADS)

    Rolet, S.

    2010-02-01

    EADS divisions aim more and more at developing services associated to their platforms. EADS divisions, like Airbus and Eurocopter, are investigating on services associated to their platforms in order to add them value. One possible service consists in structural maintenance operation assistance, especially for NDT operations performed by the customer. EADS Innovation Works envisages three different and complementary enhanced structural maintenance categories. Enhanced NDT improves standard NDT operation environment. This is made possible by the existence of "smart" NDT tools that are computer based and therefore able to support other functions. These functions range from local smart data processing and display to remote expert assisted operation. Passive Sensor Network relies on sensors permanently installed on aircraft structure. Interrogation of sensors is performed on ground and off line (while structure is not loaded except by its own weight). It can be done at arbitrary times in order to determine structure health. The aim is to give easy access to some hidden "hot spots," to reduce human factor in structure health assessment and optimize maintenance. Structural Health Monitoring goes a step beyond Passive Sensor Network, because interrogation units are on board the aircraft and may be connected to aircraft network. It allows to use on-line techniques such as adapted acoustic emission and to automatically raise an alarm when a defect appears in the structure. This paper presents these different ways of improving structural maintenance operations in service, with their respective advantages and limitations.

  14. PORTFOLIO OF POTENTIAL STRATEGIES IN AERONAUTIC MAINTENANCE

    SciTech Connect

    Rolet, S.

    2010-02-22

    EADS divisions aim more and more at developing services associated to their platforms. EADS divisions, like Airbus and Eurocopter, are investigating on services associated to their platforms in order to add them value. One possible service consists in structural maintenance operation assistance, especially for NDT operations performed by the customer. EADS Innovation Works envisages three different and complementary enhanced structural maintenance categories. Enhanced NDT improves standard NDT operation environment. This is made possible by the existence of 'smart' NDT tools that are computer based and therefore able to support other functions. These functions range from local smart data processing and display to remote expert assisted operation. Passive Sensor Network relies on sensors permanently installed on aircraft structure. Interrogation of sensors is performed on ground and off line (while structure is not loaded except by its own weight). It can be done at arbitrary times in order to determine structure health. The aim is to give easy access to some hidden ''hot spots,'' to reduce human factor in structure health assessment and optimize maintenance. Structural Health Monitoring goes a step beyond Passive Sensor Network, because interrogation units are on board the aircraft and may be connected to aircraft network. It allows to use on-line techniques such as adapted acoustic emission and to automatically raise an alarm when a defect appears in the structure. This paper presents these different ways of improving structural maintenance operations in service, with their respective advantages and limitations.

  15. 40 CFR 86.007-25 - Maintenance.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ...Engines, and for 1985 and Later Model Year New Gasoline Fueled, Natural Gas-Fueled, Liquefied Petroleum Gas-Fueled and Methanol-Fueled Heavy-Duty Vehicles § 86.007-25 Maintenance. Section 86.007-25 includes text that specifies...

  16. 40 CFR 86.007-25 - Maintenance.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ...Engines, and for 1985 and Later Model Year New Gasoline Fueled, Natural Gas-Fueled, Liquefied Petroleum Gas-Fueled and Methanol-Fueled Heavy-Duty Vehicles § 86.007-25 Maintenance. Section 86.007-25 includes text that specifies...

  17. 40 CFR 86.007-25 - Maintenance.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ...Engines, and for 1985 and Later Model Year New Gasoline Fueled, Natural Gas-Fueled, Liquefied Petroleum Gas-Fueled and Methanol-Fueled Heavy-Duty Vehicles § 86.007-25 Maintenance. Section 86.007-25 includes text that specifies...

  18. 40 CFR 86.007-25 - Maintenance.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...Engines, and for 1985 and Later Model Year New Gasoline Fueled, Natural Gas-Fueled, Liquefied Petroleum Gas-Fueled and Methanol-Fueled Heavy-Duty Vehicles § 86.007-25 Maintenance. Section 86.007-25 includes text that specifies...

  19. Industrial Maintenance Technology. Technical Committee Report.

    ERIC Educational Resources Information Center

    Idaho State Dept. of Education, Boise. Div. of Vocational Education.

    This Technical Committee Report prepared by industry representatives in Idaho lists the skills currently necessary for an employee in that state to obtain a job in industrial maintenance technology, retain a job once hired, and advance in that occupational field. (Task lists are grouped according to duty areas generally used in industry settings,…

  20. Building Maintenance. Reading and Language Activities.

    ERIC Educational Resources Information Center

    Kessman, William A.

    The student manual has been designed primarily for beginning students in a high school level vocational program in building maintenance. A workbook for special needs students, the document does not cover all areas of custodial training but has been written for the purpose of refining the basic skills of reading comprehension, vocabulary building,…

  1. OPERATION AND MAINTENANCE MANUAL FOR ELECTROSTATIC PRECIPITATORS

    EPA Science Inventory

    The manual focuses on the operation and maintenance (O/M) of typical electrostatic precipitators (ESPs). It summarizes available information on theory and design in sufficient detail to provide a basic background O/M portions of the manual. Although O/M-related air pollution prob...

  2. 40 CFR 63.1655 - Maintenance requirements.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 40 Protection of Environment 12 2010-07-01 2010-07-01 true Maintenance requirements. 63.1655 Section 63.1655 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR PROGRAMS (CONTINUED) NATIONAL EMISSION STANDARDS FOR HAZARDOUS AIR POLLUTANTS FOR SOURCE CATEGORIES National Emission Standards for Hazardous Air Pollutants...

  3. Business Machine Maintenance. Performance Objectives. Basic Course.

    ERIC Educational Resources Information Center

    McMinn, Robert

    Several intermediate performance objectives and corresponding criterion measures are listed for each of 25 terminal objectives presented in this guide for a basic business machine maintenance course at the secondary level. (For the intermediate course guide see CE 010 948.) The materials were developed for a two-semester (2 hour daily) course…

  4. Cognitive Aging: Activity Patterns and Maintenance Intentions

    ERIC Educational Resources Information Center

    Gilhooly, K. J.; Gilhooly, M. L.; Phillips, L. H.; Harvey, D.; Murray, A.; Hanlon, P.

    2007-01-01

    This study examined relationships between cognitive functioning in older people and (1) levels of mental, physical and social activities, and (2) intentions regarding maintenance of cognitive functioning. Participants (N = 145) were 70-91 years of age, varied in health status and socio-economic backgrounds. Current cognitive functioning was…

  5. Implementation of a Computerized Maintenance Management System

    NASA Technical Reports Server (NTRS)

    Shen, Yong-Hong; Askari, Bruce

    1994-01-01

    A primer Computerized Maintenance Management System (CMMS) has been established for NASA Ames pressure component certification program. The CMMS takes full advantage of the latest computer technology and SQL relational database to perform periodic services for vital pressure components. The Ames certification program is briefly described and the aspects of the CMMS implementation are discussed as they are related to the certification objectives.

  6. Stabilization Pond Operation and Maintenance Manual.

    ERIC Educational Resources Information Center

    Sexauer, Willard N.; Karn, Roger V.

    This manual provides the waste stabilization pond operator with the basics necessary for the treatment of wastewater in stabilization ponds. The material is organized as a comprehensive guide that follows the normal operation and maintenance procedures from the time the wastewater enters the left station until it leaves the pond. A comprehensive…

  7. Lineage Selection and the Maintenance of Sex

    PubMed Central

    de Vienne, Damien M.; Giraud, Tatiana; Gouyon, Pierre-Henri

    2013-01-01

    Sex predominates in eukaryotes, despite its short-term disadvantage when compared to asexuality. Myriad models have suggested that short-term advantages of sex may be sufficient to counterbalance its twofold costs. However, despite decades of experimental work seeking such evidence, no evolutionary mechanism has yet achieved broad recognition as explanation for the maintenance of sex. We explore here, through lineage-selection models, the conditions favouring the maintenance of sex. In the first model, we allowed the rate of transition to asexuality to evolve, to determine whether lineage selection favoured species with the strongest constraints preventing the loss of sex. In the second model, we simulated more explicitly the mechanisms underlying the higher extinction rates of asexual lineages than of their sexual counterparts. We linked extinction rates to the ecological and/or genetic features of lineages, thereby providing a formalisation of the only figure included in Darwin's “The origin of species”. Our results reinforce the view that the long-term advantages of sex and lineage selection may provide the most satisfactory explanations for the maintenance of sex in eukaryotes, which is still poorly recognized, and provide figures and a simulation website for training and educational purposes. Short-term benefits may play a role, but it is also essential to take into account the selection of lineages for a thorough understanding of the maintenance of sex. PMID:23825582

  8. Robot Behavior Adaptation for Formation Maintenance

    E-print Network

    López-Sánchez, Maite

    1 Robot Behavior Adaptation for Formation Maintenance Maite López-Sánchez maite@maia.ub.es WAI): ­1 or 2 reference robots to follow ­keeping fixed angle (formation property) ­and fixed distance d (separation distance) · related to robot visibility range, speed or reaction capabilities Basic behaviors I

  9. Space Assembly, Maintenance, and Servicing Study (SAMSS)

    NASA Technical Reports Server (NTRS)

    Wong, Joseph

    1986-01-01

    The goal is to define and establish Space Assembly, Maintenance, and Servicing (SAMS) capabilities to meet requirements for improved space systems. Consolidated requirements, hardware/tool concepts, systems analysis, related studies interaction, and schedule/milestones are outlined. This presentation is represented by charts and figures only.

  10. Tennis Courts: A Construction and Maintenance Manual.

    ERIC Educational Resources Information Center

    United States Tennis Court & Track Builders Association.

    This manual addresses court design and planning; the construction process; court surface selection; accessories and amenities; indoor tennis court design and renovation; care and maintenance tips; and court repair, reconstruction, and renovation. General and membership information is provided on the U.S. Tennis Court and Track Builders Association…

  11. Employment Patterns of Methadone Maintenance Clients

    ERIC Educational Resources Information Center

    Bloch, Harriet I.; And Others

    1977-01-01

    Analysis of employment patterns of methadone maintenance clients had indicated that the majority were not employed at time of program admission. At time of evaluation, 70 percent of the sample were employed; 88 percent of these clients had previous work histories and brought marketable skills with them. (Author)

  12. Community Maintenance Programs for Sexual Offenders

    ERIC Educational Resources Information Center

    Youssef, Carollyne

    2013-01-01

    While optimism regarding the treatment of sexual offenders has increased over the past couple of decades, research into the factors that assist offenders in maintaining therapeutic changes remains in the dark. Maintenance programs for offenders, while theoretically appearing to have a solid place in offender rehabilitation, surprisingly have not…

  13. Korean Heritage Language Maintenance and Language Ideology

    ERIC Educational Resources Information Center

    Jeon, Mihyon

    2008-01-01

    This paper explores ways in which language ideology is linked to maintenance of Korean as a heritage language by Koreans in America. The data for this ethnographic study come from three separate sources: 1) a Korean language program at an American university; 2) a community-based ESL program for Korean seniors; and 3) a recently immigrated Korean…

  14. 30 CFR 57.9313 - Roadway maintenance.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... 30 Mineral Resources 1 2011-07-01 2011-07-01 false Roadway maintenance. 57.9313 Section 57.9313 Mineral Resources MINE SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR METAL AND NONMETAL MINE SAFETY AND HEALTH SAFETY AND HEALTH STANDARDS-UNDERGROUND METAL AND NONMETAL MINES Loading, Hauling,...

  15. 30 CFR 57.9313 - Roadway maintenance.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 30 Mineral Resources 1 2010-07-01 2010-07-01 false Roadway maintenance. 57.9313 Section 57.9313 Mineral Resources MINE SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR METAL AND NONMETAL MINE SAFETY AND HEALTH SAFETY AND HEALTH STANDARDS-UNDERGROUND METAL AND NONMETAL MINES Loading, Hauling,...

  16. Safety and maintenance engineering: A compilation

    NASA Technical Reports Server (NTRS)

    1974-01-01

    A compilation is presented for the dissemination of information on technological developments which have potential utility outside the aerospace and nuclear communities. Safety of personnel engaged in the handling of hazardous materials and equipment, protection of equipment from fire, high wind, or careless handling by personnel, and techniques for the maintenance of operating equipment are reported.

  17. 49 CFR 193.2639 - Maintenance records.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... at each LNG plant of the date and type of each maintenance activity performed on each component to meet the requirements of this part. For each LNG facility that is designed and constructed after March... records must be retained for as long as the LNG facility remains in service: (1) Each record or...

  18. 49 CFR 193.2639 - Maintenance records.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... at each LNG plant of the date and type of each maintenance activity performed on each component to meet the requirements of this part. For each LNG facility that is designed and constructed after March... records must be retained for as long as the LNG facility remains in service: (1) Each record or...

  19. 49 CFR 193.2639 - Maintenance records.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... at each LNG plant of the date and type of each maintenance activity performed on each component to meet the requirements of this part. For each LNG facility that is designed and constructed after March... records must be retained for as long as the LNG facility remains in service: (1) Each record or...

  20. 49 CFR 193.2639 - Maintenance records.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... at each LNG plant of the date and type of each maintenance activity performed on each component to meet the requirements of this part. For each LNG facility that is designed and constructed after March... records must be retained for as long as the LNG facility remains in service: (1) Each record or...

  1. 49 CFR 193.2639 - Maintenance records.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... at each LNG plant of the date and type of each maintenance activity performed on each component to meet the requirements of this part. For each LNG facility that is designed and constructed after March... records must be retained for as long as the LNG facility remains in service: (1) Each record or...

  2. Software Assurance During Maintenance Paul E. Black

    E-print Network

    Black, Paul E.

    Software Assurance During Maintenance Paul E. Black U.S. National Institute of Standards yield assurance information in a standardized form. Developers can use this information to argue that the soft- ware is adequate for its use and secure enough for the risk. NIST's Software Assurance Metrics

  3. School Plant Maintenance and Custodial Services

    ERIC Educational Resources Information Center

    Kentucky State Dept. of Education, Frankfort.

    School maintenance guidelines are directed to the local school situation where the custodian may have neither the opportunity for any formal training or experienced personnel available to instruct him. Topics covered are those that are thought to be of greatest value to the local school custodian and include--(1) floor care, (2) carpet cleaning,…

  4. Industrial Maintenance. Ohio's Competency Analysis Profile.

    ERIC Educational Resources Information Center

    Ohio State Univ., Columbus. Vocational Instructional Materials Lab.

    Developed through a modified DACUM (Developing a Curriculum) process involving business, industry, labor, and community agency representatives in Ohio, this document is a comprehensive and verified employer competency profile for industrial maintenance occupations. The list contains units (with and without subunits), competencies, and competency…

  5. ICD Complex Operations and Maintenance Plan

    SciTech Connect

    Gibson, P. L.

    2007-06-25

    This Operations and Maintenance (O&M) Plan describes how the Idaho National Laboratory (INL) conducts operations, winterization, and startup of the Idaho CERCLA Disposal Facility (ICDF) Complex. The ICDF Complex is the centralized INL facility responsible for the receipt, storage, treatment (as necessary), and disposal of INL Comprehensive Environmental Response, Compensation and Liability Act (CERCLA) remediation waste.

  6. 21 CFR 211.58 - Maintenance.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... 21 Food and Drugs 4 2010-04-01 2010-04-01 false Maintenance. 211.58 Section 211.58 Food and Drugs FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) DRUGS: GENERAL CURRENT GOOD MANUFACTURING PRACTICE FOR FINISHED PHARMACEUTICALS Buildings and Facilities §...

  7. 21 CFR 211.58 - Maintenance.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ... 21 Food and Drugs 4 2011-04-01 2011-04-01 false Maintenance. 211.58 Section 211.58 Food and Drugs FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) DRUGS: GENERAL CURRENT GOOD MANUFACTURING PRACTICE FOR FINISHED PHARMACEUTICALS Buildings and Facilities §...

  8. Linking color polymorphism maintenance and speciation

    E-print Network

    Behavioural Ecology Research Group, Department of Biological Sciences, Simon Fraser University, Burnaby, BC, V to integrate studies of the maintenance of genetic variation and the evolution of reproductive isolation. Our been defined as the presence of two or more distinct, genetically determined color morphs within

  9. 50 CFR 80.17 - Maintenance.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... and Fisheries UNITED STATES FISH AND WILDLIFE SERVICE, DEPARTMENT OF THE INTERIOR (CONTINUED) FINANCIAL ASSISTANCE-WILDLIFE SPORT FISH RESTORATION PROGRAM ADMINISTRATIVE REQUIREMENTS, PITTMAN-ROBERTSON WILDLIFE RESTORATION AND DINGELL-JOHNSON SPORT FISH RESTORATION ACTS § 80.17 Maintenance. The State...

  10. Using Maintenance Rehearsal to Explore Recognition Memory

    ERIC Educational Resources Information Center

    Humphreys, Michael S.; Maguire, Angela M.; McFarlane, Kimberley A.; Burt, Jennifer S.; Bolland, Scott W.; Murray, Krista L.; Dunn, Ryan

    2010-01-01

    We examined associative and item recognition using the maintenance rehearsal paradigm. Our intent was to control for mnemonic strategies; to produce a low, graded level of learning; and to provide evidence of the role of attention in long-term memory. An advantage for low-frequency words emerged in both associative and item recognition at very low…

  11. Solving Problems.

    ERIC Educational Resources Information Center

    Hale, Norman; Lindelow, John

    Chapter 12 in a volume on school leadership, this chapter cites the work of several authorities concerning problem-solving or decision-making techniques based on the belief that group problem-solving effort is preferable to individual effort. The first technique, force-field analysis, is described as a means of dissecting complex problems into…

  12. Achieving sub-10-nm resolution using scanning electron beam lithography

    E-print Network

    Cord, Bryan M. (Bryan Michael), 1980-

    2009-01-01

    Achieving the highest possible resolution using scanning-electron-beam lithography (SEBL) has become an increasingly urgent problem in recent years, as advances in various nanotechnology applications have driven demand for ...

  13. Maintenance and operation of the USDOE Alternative Fuel Center

    SciTech Connect

    Erwin, J.; Moulton, D.S.; Hetrick, D.L.

    1994-08-01

    The Alternative Fuels Utilization Program (AFUP) of the Office of Energy Efficiency and Renewable Energy has investigated the possibilities and limitations of expanded scope of fuel alternatives and replacement means for transportation fuels from alternative sources. Under the AFUP, the Alternative Fuel Center (AFC) was created to solve problems in the DOE programs that were grappling with the utilization of shale oil and coal liquids for transportation fuels. In year one of this contract, a timeline was set to coordinate uses and operations of the AFC hydrogenation pilot plant among test fuels production project work, facility maintenance, other government work, and work for industry for second-generation operations. In year two, consistent with assisting the AFUP in accomplishing its general goals, the work was done with fuel producers, regulators, and users in mind. AFC capabilities and results were disseminated through tours and outside presentations.

  14. The 2015 super-resolution microscopy roadmap

    NASA Astrophysics Data System (ADS)

    Hell, Stefan W.; Sahl, Steffen J.; Bates, Mark; Zhuang, Xiaowei; Heintzmann, Rainer; Booth, Martin J.; Bewersdorf, Joerg; Shtengel, Gleb; Hess, Harald; Tinnefeld, Philip; Honigmann, Alf; Jakobs, Stefan; Testa, Ilaria; Cognet, Laurent; Lounis, Brahim; Ewers, Helge; Davis, Simon J.; Eggeling, Christian; Klenerman, David; Willig, Katrin I.; Vicidomini, Giuseppe; Castello, Marco; Diaspro, Alberto; Cordes, Thorben

    2015-11-01

    Far-field optical microscopy using focused light is an important tool in a number of scientific disciplines including chemical, (bio)physical and biomedical research, particularly with respect to the study of living cells and organisms. Unfortunately, the applicability of the optical microscope is limited, since the diffraction of light imposes limitations on the spatial resolution of the image. Consequently the details of, for example, cellular protein distributions, can be visualized only to a certain extent. Fortunately, recent years have witnessed the development of ‘super-resolution’ far-field optical microscopy (nanoscopy) techniques such as stimulated emission depletion (STED), ground state depletion (GSD), reversible saturated optical (fluorescence) transitions (RESOLFT), photoactivation localization microscopy (PALM), stochastic optical reconstruction microscopy (STORM), structured illumination microscopy (SIM) or saturated structured illumination microscopy (SSIM), all in one way or another addressing the problem of the limited spatial resolution of far-field optical microscopy. While SIM achieves a two-fold improvement in spatial resolution compared to conventional optical microscopy, STED, RESOLFT, PALM/STORM, or SSIM have all gone beyond, pushing the limits of optical image resolution to the nanometer scale. Consequently, all super-resolution techniques open new avenues of biomedical research. Because the field is so young, the potential capabilities of different super-resolution microscopy approaches have yet to be fully explored, and uncertainties remain when considering the best choice of methodology. Thus, even for experts, the road to the future is sometimes shrouded in mist. The super-resolution optical microscopy roadmap of Journal of Physics D: Applied Physics addresses this need for clarity. It provides guidance to the outstanding questions through a collection of short review articles from experts in the field, giving a thorough discussion on the concepts underlying super-resolution optical microscopy, the potential of different approaches, the importance of label optimization (such as reversible photoswitchable proteins) and applications in which these methods will have a significant impact. Mark Bates, Christian Eggeling

  15. Resolution on Homelessness.

    ERIC Educational Resources Information Center

    American Psychologist, 1991

    1991-01-01

    States the American Psychological Association Council of Representatives' resolution on homelessness. Authorizes executive officers to stimulate research about homelessness, recommend action to government officials, advocate public funding, disseminate accurate information, and encourage and endorse appropriate legislation. (JB)

  16. AIR TRAFFIC CONFLICT NEGOTIATION AND RESOLUTION USING AN ONBOARD

    E-print Network

    Valasek, John

    Resolution A constraint satisfaction problem Resolution space: composed of all possible flight plans FLIGHT Primary goal is to enable free flight for General Aviation (GA) A new way of managing air traffic decision making authority lies with the air traffic controllers Modern technologies make Free Flight

  17. Resolution analysis for imaging with noise Josselin Garnier1

    E-print Network

    Papanicolaou, George C.

    Resolution analysis for imaging with noise Josselin Garnier1 and George Papanicolaou2 1 Laboratoire.30.Wb Submitted to: Inverse Problems #12;Resolution analysis for imaging with noise 2 1. Introduction reflectors can be imaged by suitably migrating cross correlations of noise signals recorded by passive sensor

  18. High-Resolution Autoradiography

    NASA Technical Reports Server (NTRS)

    Towe, George C; Gomberg, Henry J; Freemen, J W

    1955-01-01

    This investigation was made to adapt wet-process autoradiography to metallurgical samples to obtain high resolution of segregated radioactive elements in microstructures. Results are confined to development of the technique, which was perfected to a resolution of less than 10 microns. The radioactive samples included carbon-14 carburized iron and steel, nickel-63 electroplated samples, a powder product containing nickel-63, and tungsten-185 in N-155 alloy.

  19. 75 FR 37457 - Maintenance Wage Rate Wage Recommendation and Maintenance Wage Survey; Report of Additional...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-06-29

    ... adopt prevailing wage rates for maintenance laborers and mechanics, and to approve or refer to the U.S... laborers and mechanics, and to approve or refer to the U.S. Department of Labor for approval, when...

  20. 14 CFR 43.9 - Content, form, and disposition of maintenance, preventive maintenance, rebuilding, and alteration...

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... preventive maintenance, rebuilds, or alters an aircraft, airframe, aircraft engine, propeller, appliance, or... aircraft, airframe, aircraft engine, propeller, appliance, or component part has been performed... Aeronautics and Space FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION AIRCRAFT...