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Sample records for definition scheduling construction

  1. School Construction Scheduling.

    Science.gov (United States)

    Delaney, J. B.

    1983-01-01

    Explains that favorable market and working conditions influence the scheduling of school construction projects. Facility planners, architects, and contractors are advised to develop a realistic time schedule for the entire project. (MLF)

  2. ATLAS construction schedule

    CERN Multimedia

    Kotamaki, M

    The goal during the last few months has been to freeze and baseline as much as possible the schedules of various ATLAS systems and activities. The main motivations for the re-baselining of the schedules have been the new LHC schedule aiming at first collisions in early 2006 and the encountered delays in civil engineering as well as in the production of some of the detectors. The process was started by first preparing a new installation schedule that takes into account all the new external constraints and the new ATLAS staging scenario. The installation schedule version 3 was approved in the March EB and it provides the Ready For Installation (RFI) milestones for each system, i.e. the date when the system should be available for the start of the installation. TCn is now interacting with the systems aiming at a more realistic and resource loaded version 4 before the end of the year. Using the new RFI milestones as driving dates a new summary schedule has been prepared, or is under preparation, for each system....

  3. BIM-BASED SCHEDULING OF CONSTRUCTION

    DEFF Research Database (Denmark)

    Andersson, Niclas; Büchmann-Slorup, Rolf

    2010-01-01

    overlap of the design and construction processes. Consequently, the overall scheduling is primarily based on intuition and personal experiences, rather than well founded figures of the specific project. Finally, the overall schedule is comprehensive and complex, and consequently, difficult to overview......The potential of BIM is generally recognized in the construction industry, but the practical application of BIM for management purposes is, however, still limited among contractors. The objective of this study is to review the current scheduling process of construction in light of BIM...... and communicate. Scheduling on the detailed level, on the other hand, follows a stipulated approach to scheduling, i.e. the Last Planner System (LPS), which is characterized by involvement of all actors in the construction phase. Thus, the major challenge when implementing BIM-based scheduling is to improve...

  4. BIM-BASED SCHEDULING OF CONSTRUCTION

    DEFF Research Database (Denmark)

    Andersson, Niclas; Büchmann-Slorup, Rolf

    2010-01-01

    The potential of BIM is generally recognized in the construction industry, but the practical application of BIM for management purposes is, however, still limited among contractors. The objective of this study is to review the current scheduling process of construction in light of BIM...... overlap of the design and construction processes. Consequently, the overall scheduling is primarily based on intuition and personal experiences, rather than well founded figures of the specific project. Finally, the overall schedule is comprehensive and complex, and consequently, difficult to overview...... and communicate. Scheduling on the detailed level, on the other hand, follows a stipulated approach to scheduling, i.e. the Last Planner System (LPS), which is characterized by involvement of all actors in the construction phase. Thus, the major challenge when implementing BIM-based scheduling is to improve...

  5. A Study on the Engineering Construction Schedule Control

    Institute of Scientific and Technical Information of China (English)

    Song Shihai

    2014-01-01

    In the whole process of engineering construction,its schedule control is a very important part,which not only directly affects the quality of the whole project,but also plays a very important role in the economic effect of the entire project. Meanwhile,in the particular process of engineering construction,since construction is a dynamic process,coupled with the numerous factors that involved in the engineering construction schedule control and the program is quite complex,it is so imperative to put the factors and program involved in order;and from a dynamic point of view,the construction schedule control can be studied and analyzed in a comprehensive way. The paper begins with the study of relative definitions of engineering construction schedule control and illustrates the involved factors and the corresponding influence of them on the engineering construction schedule control based on the case study of real estate project construction schedule control at Fuyuan Jiayuan of Tai'an City. And some related suggestions are put forward on the base and the author expects to make an active theoretical guidance effect on engineering construction.

  6. Real-time and dynamic schedule optimization of construction projects on the basis of lean construction

    Institute of Scientific and Technical Information of China (English)

    QI Shen-jun; DING Lie-yun; LUO Han-bin; DONG Xiao-yan

    2007-01-01

    Lean construction has been newly applied to construction industry. The best performance of a project can be achieved through the precise definition of construction product, rational work break structure, lean supply chain, decrease of resources waste, objective control and so forth. Referring to the characteristics of schedule planning of construction projects and lean construction philosophy, we proposed optimizing methodology of real-time and dynamic schedule of construction projects based on lean construction. The basis of the methodology is process reorganization and lean supply in construction enterprises. The traditional estimating method of the activity duration is fuzzy and random; however, a newly proposed lean forecasting method employs multi-components linear-regression, back-propagation artificial neural networks and learning curve. Taking account of the limited resources and the fixed duration of a project, the optimizing method of the real-time and dynamic schedule adopts the concept of resource driving. To optimize the schedule of a construction project timely and effectively, an intellectualized schedule management system was developed. It can work out the initial schedule, optimize the real-time and dynamic schedule, and display the schedule with the Gant Chart, the net-work graph and the space-time line chart. A case study was also presented to explain the proposed method.

  7. 48 CFR 52.236-15 - Schedules for Construction Contracts.

    Science.gov (United States)

    2010-10-01

    ... 48 Federal Acquisition Regulations System 2 2010-10-01 2010-10-01 false Schedules for Construction....236-15 Schedules for Construction Contracts. As prescribed in 36.515, insert the following clause: Schedules for Construction Contracts (APR 1984) (a) The Contractor shall, within five days after the...

  8. 48 CFR 436.575 - Maximum workweek-construction schedule.

    Science.gov (United States)

    2010-10-01

    ...-construction schedule. 436.575 Section 436.575 Federal Acquisition Regulations System DEPARTMENT OF AGRICULTURE... Maximum workweek-construction schedule. The contracting officer shall insert the clause at 452.236-75, Maximum Workweek-Construction Schedule, if the clause at FAR 52.236-15 is used and the contractor's...

  9. Geographic Information Systems in Evaluation and Visualization of Construction Schedule

    CERN Document Server

    Bansal, V K

    2008-01-01

    Commercially available scheduling tools such as Primavera and Microsoft Project fail to provide information pertaining to the spatial aspects of construction project. A methodology using geographical information systems (GIS) is developed to represent spatial aspects of the construction progress graphically by synchronizing it with construction schedule. The spatial aspects are depicted by 3D model developed in AutoCAD and construction schedule is generated using Microsoft Excel. Spatial and scheduling information are linked together into the GIS environment (ArcGIS). The GIS-based system developed in this study may help in better understanding the schedule along with its spatial aspects.

  10. Geographic Information Systems in Evaluation and Visualization of Construction Schedule

    OpenAIRE

    Bansal, V. K.; Pal, Mahesh

    2008-01-01

    Commercially available scheduling tools such as Primavera and Microsoft Project fail to provide information pertaining to the spatial aspects of construction project. A methodology using geographical information systems (GIS) is developed to represent spatial aspects of the construction progress graphically by synchronizing it with construction schedule. The spatial aspects are depicted by 3D model developed in AutoCAD and construction schedule is generated using Microsoft Excel. Spatial and ...

  11. Probability distribution fitting of schedule overruns in construction projects

    OpenAIRE

    P E D Love; C-P Sing; WANG, X; Edwards, D.J.; H Odeyinka

    2013-01-01

    The probability of schedule overruns for construction and engineering projects can be ascertained using a ‘best fit’ probability distribution from an empirical distribution. The statistical characteristics of schedule overruns occurring in 276 Australian construction and engineering projects were analysed. Skewness and kurtosis values revealed that schedule overruns are non-Gaussian. Theoretical probability distributions were then fitted to the schedule overrun data; including the Kolmogorov–...

  12. Resource-Driven Scheduling Implementation in Malaysian Construction Industry

    OpenAIRE

    Aftab Hameed Memon; Rosli Mohammad Zin

    2011-01-01

    Resource-driven scheduling techniques focus on resource. Their objective is to schedule activities so that a project dead line is met using predefined resource availability limits. This paper reports about the status of resource-driven scheduling implementation in Malaysian construction industry. An investigation Survey was conducted to determine the level of resource-driven scheduling and factors affecting the concerned implementation. Construction Firm registered under G7 (A Class), G6 (B c...

  13. 48 CFR 552.238-77 - Definition (Federal Supply Schedules).

    Science.gov (United States)

    2010-10-01

    ... 48 Federal Acquisition Regulations System 4 2010-10-01 2010-10-01 false Definition (Federal Supply... ADMINISTRATION CLAUSES AND FORMS SOLICITATION PROVISIONS AND CONTRACT CLAUSES Text of Provisions and Clauses 552.238-77 Definition (Federal Supply Schedules). As prescribed in 538.7004(a), insert the...

  14. 48 CFR 36.515 - Schedules for construction contracts.

    Science.gov (United States)

    2010-10-01

    ... 48 Federal Acquisition Regulations System 1 2010-10-01 2010-10-01 false Schedules for construction... SPECIAL CATEGORIES OF CONTRACTING CONSTRUCTION AND ARCHITECT-ENGINEER CONTRACTS Contract Clauses 36.515 Schedules for construction contracts. The contracting officer may insert the clause at 52.236-15,...

  15. Resource-Driven Scheduling Implementation in Malaysian Construction Industry

    Directory of Open Access Journals (Sweden)

    Aftab Hameed Memon

    2011-07-01

    Full Text Available Resource-driven scheduling techniques focus on resource. Their objective is to schedule activities so that a project dead line is met using predefined resource availability limits. This paper reports about the status of resource-driven scheduling implementation in Malaysian construction industry. An investigation Survey was conducted to determine the level of resource-driven scheduling and factors affecting the concerned implementation. Construction Firm registered under G7 (A Class, G6 (B class and G5 (C class were used in investigation. Data was analyzed by Statistical package SPSS to find the means and rank. Average index method was adapted to for the level of features of resource scheduling implementation and barrier to resource-driven scheduling. It is significant 59.65% firms are implementing resource-driven scheduling as partial. Also methods of project scheduling and resource options adopted were investigated. A Significant majority of construction firms (approximately 65% adopt Microsoft project for scheduling. Study showed that the features of resource scheduling are being implemented at Medium Level. Lack of understanding / awareness of concepts, lack of genuine commitment, lack of coordination of key personnel and Lack of coordination of constructors consultants were found major factors that affect resource-driven scheduling. While, expensive to prepare is most contributing factor, no enforcement on schedules from authority, difficult to prepare and hurdles by personnel/authorities were found as major constraints in implementing resource driven scheduling.

  16. Project control integrating cost and schedule in construction

    CERN Document Server

    Del Pico, Wayne J

    2013-01-01

    The key to successful project control is the fusing of cost to schedule whereby the management of one helps to manage the other. Project Control: Integrating Cost and Schedule in Construction explores the reasons behind and the methodologies for proper planning, monitoring, and controlling both project costs and schedule. Filling a current void the topic of project control applied to the construction industry, it is essential reading for students and professionals alike.

  17. ALGORITHMIC CONSTRUCTION SCHEDULES IN CONDITIONS OF TIMING CONSTRAINTS

    Directory of Open Access Journals (Sweden)

    Alexey S. Dobrynin

    2014-01-01

    Full Text Available Tasks of time-schedule construction (JSSP in various fields of human activities have an important theoretical and practical significance. The main feature of these tasks is a timing requirement, describing allowed planning time periods and periods of downtime. This article describes implementation variations of the work scheduling algorithm under timing requirements for the tasks of industrial time-schedules construction, and service activities.

  18. GIS-Based Simulation of Engineering Construction Schedule

    Institute of Scientific and Technical Information of China (English)

    ZHANG Jing; ZHONG Denghua; HU Chengshun

    2005-01-01

    For its complexity, engineering construction schedule design is limited by various factors.Simulation-based engineering construction schedule takes critical path method (CPM) network as frame and calls complex cyclic operation network (CYCLONE) simulation model enclosed in advance for its simulation nodes. CYCLONE simulation model takes charge of simulating stochastic duration of activity and efficiency of resources, while CPM model performs project scheduling. This combination avoids the shortcomings of both models. Furthermore, geographic information system (GIS) technique is utilized to visualize the construction processes which are otherwise difficult to be understood by static results described. Application in practical project verifies the feasibility and advantage of the technique.

  19. The LSST Scheduler from design to construction

    Science.gov (United States)

    Delgado, Francisco; Reuter, Michael A.

    2016-07-01

    The Large Synoptic Survey Telescope (LSST) will be a highly robotic facility, demanding a very high efficiency during its operation. To achieve this, the LSST Scheduler has been envisioned as an autonomous software component of the Observatory Control System (OCS), that selects the sequence of targets in real time. The Scheduler will drive the survey using optimization of a dynamic cost function of more than 200 parameters. Multiple science programs produce thousands of candidate targets for each observation, and multiple telemetry measurements are received to evaluate the external and the internal conditions of the observatory. The design of the LSST Scheduler started early in the project supported by Model Based Systems Engineering, detailed prototyping and scientific validation of the survey capabilities required. In order to build such a critical component, an agile development path in incremental releases is presented, integrated to the development plan of the Operations Simulator (OpSim) to allow constant testing, integration and validation in a simulated OCS environment. The final product is a Scheduler that is also capable of running 2000 times faster than real time in simulation mode for survey studies and scientific validation during commissioning and operations.

  20. 78 FR 12755 - Federal Acquisition Regulation; Submission for OMB Review; Schedules for Construction Contracts

    Science.gov (United States)

    2013-02-25

    ... Regulation; Submission for OMB Review; Schedules for Construction Contracts AGENCY: Department of Defense... collection requirement concerning schedules for construction contracts. A notice was published in the Federal..., Schedules for Construction Contracts by any of the following methods: Regulations.gov :...

  1. 77 FR 73659 - Federal Acquisition Regulation; Information Collection; Schedules for Construction Contracts

    Science.gov (United States)

    2012-12-11

    ... Regulation; Information Collection; Schedules for Construction Contracts AGENCIES: Department of Defense (DOD... previously approved information collection requirement concerning schedules for construction contracts...: Submit comments identified by Information Collection 9000- 0058, Schedules for Construction Contracts...

  2. Conception of Self-Construction Production Scheduling System

    Science.gov (United States)

    Xue, Hai; Zhang, Xuerui; Shimizu, Yasuhiro; Fujimura, Shigeru

    With the high speed innovation of information technology, many production scheduling systems have been developed. However, a lot of customization according to individual production environment is required, and then a large investment for development and maintenance is indispensable. Therefore now the direction to construct scheduling systems should be changed. The final objective of this research aims at developing a system which is built by it extracting the scheduling technique automatically through the daily production scheduling work, so that an investment will be reduced. This extraction mechanism should be applied for various production processes for the interoperability. Using the master information extracted by the system, production scheduling operators can be supported to accelerate the production scheduling work easily and accurately without any restriction of scheduling operations. By installing this extraction mechanism, it is easy to introduce scheduling system without a lot of expense for customization. In this paper, at first a model for expressing a scheduling problem is proposed. Then the guideline to extract the scheduling information and use the extracted information is shown and some applied functions are also proposed based on it.

  3. A New Schedule Estimation Technique for Construction Projects

    OpenAIRE

    D. H. Warburton, Roger

    2014-01-01

    Allen studied hundreds of construction projects and developed an accu-rate, practically useful model of their labor profiles. We combine Al-len’s labor profile with standard Earned Value Management (EVM) techniques and derive a simple, practical formula that estimates the fi-nal schedule from early project data. The schedule estimation formula is exact; it requires no approximations. The estimate is also surprisingly accurate and available early enough in the project for the project manager ...

  4. An Analysis of Construction Cost and Schedule Performance

    Science.gov (United States)

    2008-03-01

    paradigm to develop project success measures. Griffith, Gibson, Hamilton, Tortora , and Wilson (1999 categorized projects by their cost, schedule, and...E., Hamilton, M. R., Tortora , A. L., & Wilson, C. T. (1999). Project success index for capital facility construction projects. Journal of

  5. 42 CFR 137.280 - Construction Definitions.

    Science.gov (United States)

    2010-10-01

    ..., DEPARTMENT OF HEALTH AND HUMAN SERVICES TRIBAL SELF-GOVERNANCE Construction Construction Definitions § 137... environmental assessment nor an environmental impact statement is required. Any procedures under this section... environmental effect. CEQ means Council on Environmental Quality in the Office of the President....

  6. Construction management scheduling and control: The familiar historical overview

    Directory of Open Access Journals (Sweden)

    Behnam Ali

    2016-01-01

    Full Text Available The paper suggests that ‘management by exception’ is an historical default control mechanism based on the perception of control as a static process. However, increasingly scholars claim that a dynamic and proactive systems model is a more effective form of project control. These findings are the result of an historical desktop research method that analysed content from a small sample of scheduling methods and control approaches found in online and university library resources. The concept of control has historically influenced both visualization and analytics of different scheduling methods for construction project management. This paper focuses on two control ideals; static and dynamic control mechanisms. The overview begins with the description of early graphical scheduling techniques: Gantt charts and Harmonogram. It continues with examples of contributors to scheduling and control that include: CPM, PERT, LOB, Flowline and Location Based Management. The finding of this simple history suggests that change is the constant element for project control mechanisms. An object-based digital environment such as the data-rich building information modelling (BIM appears to be continuing the change for new scheduling methods and control mechanisms.

  7. KASS v.2.2. scheduling software for construction

    Directory of Open Access Journals (Sweden)

    Krzemiński Michał

    2016-01-01

    Full Text Available The paper presents fourth version of specialist useful software in scheduling KASS v.2.2 (Algorithm Scheduling Krzeminski System. KASS software is designed for construction scheduling, specially form flow shop models. The program is being dedicated closely for the purposes of the construction. In distinguishing to other used programs in tasks of this type operational research criteria were designed closely with the thought about construction works and about the specificity of the building production. The minimal time, the minimal slack of brigades, the minimal slacks of the chosen working brigade and costs of the transfer operation of working fronts are included in operational research criteria between work centers. It is possible to enter data into the program both by hand as well as to load the Excel from files, similarly is with results, they are presented on-screen as well as a possibility of enrolling them in the file exists Excel. An element is very valid for it since allows for further simple processing of received results. In providing software for performing operational research calculations a technique of the complete review and simulation technology are being exploited. Described algorithms a program is using which will stay in the article as well as shown computational examples will remain.

  8. REPNET: project scheduling and workflow optimization for Construction Projects

    Directory of Open Access Journals (Sweden)

    Marco Alvise Bragadin

    2013-10-01

    Full Text Available Project planning and control are core processes for construction management. In practice project planning is achieved by network - based techniques like Precedence Diagramming Method (PDM.Indeed many researchers and practitioners claims that networking techniques as such do not provide a suitable model for construction projects. Construction process modeling should incorporate for specific features of resource flows through project activities. So an improved resource scheduling method for construction is developed, called REPNET, based on a precedence network plotted on a resource–space chart and presented with a flow-line chart. The heuristics of REPNET are used to carry out resource timing while optimizing processes flows and resource usage. The method has been tested on a sample project.

  9. Genetic algorithm-based multi-objective model for scheduling of linear construction projects

    OpenAIRE

    Senouci, Ahmed B.; Al-Derham, H.R.

    2007-01-01

    This paper presents a genetic algorithm-based multi-objective optimization model for the scheduling of linear construction projects. The model allows construction planners to generate and evaluate optimal/near-optimal construction scheduling plans that minimize both project time and cost. The computations in the present model are organized in three major modules. A scheduling module that develops practical schedules for linear construction projects. A cost module that computes the project's c...

  10. Tunnel Engineering Construction Schedule Analysis and Management Based on Visual Simulation

    Institute of Scientific and Technical Information of China (English)

    SONG Yang; ZHONG Wei

    2007-01-01

    The methodology of visual simulation for a tunnel engineering construction schedule is presented. Visualization of simulation model, calculation and result of construction schedule simulation is realized, and the construction simulation and the resource optimization of tunnel engineering are made. A risk analysis and a decision-making method of tunnel engineering construction schedule based on visual simulation are presented. Furthermore, using S curve theory and schedule management method, the real-time management and control method of tunnel engineering construction based on visual simulation is presented. The application to the tunnel engineering construction schedule analysis and management shows the feasibility and effectiveness of the method presented in this paper.

  11. 48 CFR 452.236-75 - Maximum Workweek-Construction Schedule.

    Science.gov (United States)

    2010-10-01

    ...-Construction Schedule. 452.236-75 Section 452.236-75 Federal Acquisition Regulations System DEPARTMENT OF....236-75 Maximum Workweek—Construction Schedule. As prescribed in 436.575, insert the following clause: Maximum Workweek—Construction Schedule (NOV 1996) Within __ calendar days after receipt of a...

  12. CONSTRUCTION OF INDECOMPOSABLE DEFINITE HERMITIAN FORMS

    Institute of Scientific and Technical Information of China (English)

    ZHUFUZU

    1994-01-01

    This paper gives a method to construct indecomposable positive definite integral Hermitian forms over an imaginary qusadratic field Q(√-m)with given discriminant and given rank.It is shown that for any natural numbers n and a, there are n-ary indecompossble positive definite integral Hermitian lattices over Q(√-1)(resp.Q(√-2)with discriminant a1 except for four (resp.one) exceptions. In these exceptional cases there are no lattices with the desired properties.

  13. Fuzzy Optimization of Construction Engineering Project Schedule Based on Critical Chain Management

    OpenAIRE

    Liu, Jianbing; Ren, Hong; Junshu DU

    2013-01-01

    Critical chain management was the very important theory innovation in the development of construction project schedule management field in recent years. Compared with the traditional methods of construction project schedule management, the methods of critical chain management considered resource constraints into construction project schedule management, the construction project cycle was shortened and the efficiency was enhanced by using the dynamic thinking and circulation pattern to manage ...

  14. SEMI-DEFINITE RELAXATION ALGORITHM FOR SINGLE MACHINE SCHEDULING WITH CONTROLLABLE PROCESSING TIMES

    Institute of Scientific and Technical Information of China (English)

    CHEN FENG; ZHANG LIANSHENG

    2005-01-01

    The authors present a semi-definite relaxation algorithm for the scheduling problem with controllable times on a single machine. Their approach shows how to relate this problem with the maximum vertex-cover problem with kernel constraints (MKVC).The established relationship enables to transfer the approximate solutions of MKVCinto the approximate solutions for the scheduling problem. Then, they show how to obtain an integer approximate solution for MKVC based on the semi-definite relaxation and randomized rounding technique.

  15. Research for Global Coordinating Method of Large Equipment Scheduling in Construction Site

    Directory of Open Access Journals (Sweden)

    Yao Ruojun

    2015-01-01

    Full Text Available Much energy is dissipated when large equipment moves slowly. Generally, equipment scheduling at construction site is supposed to minimize equipment slowdown and deadhead moving. Table methods are always adopted to optimize transfer sequence, but the feasible solution is well disappointing. For the acceptable solution relevant to task points in construction equipment scheduling, transfer table is divided into four regions. After proper augmentation and deflation, the acceptable solution evolves into global coordinating solution of construction scheduling, which contributes to minimizing slowdown and deadhead mileages. This method has been verified in practical engineering and is a significant reference on decision making of construction equipment scheduling.

  16. 48 CFR 552.238-76 - Definition (Federal Supply Schedules)-Recovery Purchasing.

    Science.gov (United States)

    2010-10-01

    ... 48 Federal Acquisition Regulations System 4 2010-10-01 2010-10-01 false Definition (Federal Supply... SERVICES ADMINISTRATION CLAUSES AND FORMS SOLICITATION PROVISIONS AND CONTRACT CLAUSES Text of Provisions and Clauses 552.238-76 Definition (Federal Supply Schedules)—Recovery Purchasing. As prescribed in...

  17. Construction of basic match schedules for sports competitions by using graph theory

    NARCIS (Netherlands)

    Weert, van Arjan; Schreuder, Jan A.M.; Burke, Edmund; Carter, Michael

    1998-01-01

    Basic Match Schedules are important for constructing sports timetables. Firstly these schedules guarantee the fairness of the sports competitions and secondly they reduce the complexity of the problem. This paper presents an approach to the problem of finding Basic Match Schedules for sports competi

  18. Construction of basic match schedules for sports competitions by using graph theory

    NARCIS (Netherlands)

    van Weert, Arjan; Schreuder, J.A.M.; Burke, Edmund; Carter, Michael

    1997-01-01

    Basic Match Schedules are important for constructing sports timetables. Firstly these schedules guarantee the fairness of the sports competitions and secondly they reduce the complexity of the problem. This paper presents an approach to the problem of finding Basic Match Schedules for sports

  19. Research on information models for the construction schedule management based on the IFC standard

    Directory of Open Access Journals (Sweden)

    Weirui Xue

    2015-05-01

    Full Text Available Purpose: The purpose of this article is to study the description and extension of the Industry Foundation Classes (IFC standard in construction schedule management, which achieves the information exchange and sharing among the different information systems and stakeholders, and facilitates the collaborative construction in the construction projects. Design/methodology/approach: The schedule information processing and coordination are difficult in the complex construction project. Building Information Modeling (BIM provides the platform for exchanging and sharing information among information systems and stakeholders based on the IFC standard. Through analyzing the schedule plan, implementing, check and control, the information flow in the schedule management is reflected based on the IDEF. According to the IFC4, the information model for the schedule management is established, which not only includes the each aspect of the schedule management, but also includes the cost management, the resource management, the quality management and the risk management. Findings: The information requirement for the construction schedule management can be summarized into three aspects: the schedule plan information, the implementing information and the check and control information. The three aspects can be described through the existing and extended entities of IFC4, and the information models are established. Originality/value: The main contribution of the article is to establish the construction schedule management information model, which achieves the information exchange and share in the construction project, and facilitates the development of the application software to meet the requirements of the construction project.

  20. Nuclear Power Plant Construction Scheduling Problem with Time Restrictions: A Particle Swarm Optimization Approach

    Directory of Open Access Journals (Sweden)

    Shang-Kuan Chen

    2016-01-01

    Full Text Available In nuclear power plant construction scheduling, a project is generally defined by its dependent preparation time, the time required for construction, and its reactor installation time. The issues of multiple construction teams and multiple reactor installation teams are considered. In this paper, a hierarchical particle swarm optimization algorithm is proposed to solve the nuclear power plant construction scheduling problem and minimize the occurrence of projects failing to achieve deliverables within applicable due times and deadlines.

  1. Research on information models for the construction schedule management based on the IFC standard

    OpenAIRE

    Weirui Xue; Yaowu Wang; Qingpeng Man

    2015-01-01

    Purpose: The purpose of this article is to study the description and extension of the Industry Foundation Classes (IFC) standard in construction schedule management, which achieves the information exchange and sharing among the different information systems and stakeholders, and facilitates the collaborative construction in the construction projects. Design/methodology/approach: The schedule information processing and coordination are difficult in the complex construction project. Building In...

  2. Magnitude of Construction Cost and Schedule Overruns in Public Work Projects

    OpenAIRE

    Pramen P. Shrestha; Burns, Leslie A.; Shields, David R.

    2013-01-01

    This study analyzed 363 Clark County Department of Public Works (CCDPW) projects to determine construction cost and schedule overruns in various types and sizes of the projects. The sample projects were constructed from 1991 to 2008, with a total construction cost of $1.85 billion, equivalent to 2012 cost. A one-factor ANOVA test was conducted to determine whether construction cost and schedule overruns significantly varied based on types and sizes of the projects. The study showed that lar...

  3. Magnitude of Construction Cost and Schedule Overruns in Public Work Projects

    Directory of Open Access Journals (Sweden)

    Pramen P. Shrestha

    2013-01-01

    Full Text Available This study analyzed 363 Clark County Department of Public Works (CCDPW projects to determine construction cost and schedule overruns in various types and sizes of the projects. The sample projects were constructed from 1991 to 2008, with a total construction cost of $1.85 billion, equivalent to 2012 cost. A one-factor ANOVA test was conducted to determine whether construction cost and schedule overruns significantly varied based on types and sizes of the projects. The study showed that large, long-duration projects had significantly higher cost and schedule overruns than smaller, short-duration projects.

  4. Computerized Schedule Construction in College and University Physical Education Departments.

    Science.gov (United States)

    Hattlestad, Neil

    This paper describes the use of a computer in scheduling physical education classes and activities. The advantages of the computer are pointed out in terms of person hours of work saved for the school administrator. (JD)

  5. Towards an Operational Definition of Lean Construction Onsite

    OpenAIRE

    Sjögren Leong, Michelle; Ward, Steve; Koskela, Lauri

    2015-01-01

    Through literature review and drawing from a combined professional experience of over 20 years of lean construction implementation, this paper investigates the key success factor for the automotive industry’s uptake of lean production to see what the construction industry can derive from it. The paper concludes that there exist a variety of definitions of lean, but no existing definition is yet satisfactory to describe lean construction in a rigorously testable method. This is a major obstacl...

  6. 75 FR 57947 - Auction of VHF Commercial Television Station Construction Permits Scheduled for February 15, 2011...

    Science.gov (United States)

    2010-09-23

    ...This document announces the auction of certain VHF construction permits scheduled to commence on February 15, 2011 (Auction 90). This document also seeks comment on competitive bidding procedures for Auction 90.

  7. Reliability Level of in the Production Schedule Design in the Construction Company

    OpenAIRE

    Velina Yordanova

    2013-01-01

    A reliable production schedule is an important prerequisite for the achievement of good economic results on the part of the construction enterprise and for ensuring rhythmical and effective work in its functioning. In this respect in the present article there are considered the peculiarities of the production schedule, which we believe it is necessary to consider during its development. Taking into consideration the characteristics of construction production there is made an attempt at propos...

  8. Optimal Scheduling of Railway Track Possessions in Large-Scale Projects with Multiple Construction Works

    DEFF Research Database (Denmark)

    Li, Rui; Roberti, Roberto

    2017-01-01

    This paper addresses the railway track possession scheduling problem (RTPSP), where a large-scale railway infrastructure project consisting of multiple construction works is to be planned. The RTPSP is to determine when to perform the construction works and in which track possessions while satisf...

  9. Fuzzy Optimization of Construction Engineering Project Schedule Based on Critical Chain Management

    Directory of Open Access Journals (Sweden)

    Jianbing LIU

    2013-07-01

    Full Text Available Critical chain management was the very important theory innovation in the development of construction project schedule management field in recent years. Compared with the traditional methods of construction project schedule management, the methods of critical chain management considered resource constraints into construction project schedule management, the construction project cycle was shortened and the efficiency was enhanced by using the dynamic thinking and circulation pattern to manage whole project. In view of the progress of critical chain management of the article, fuzzy theory  was used to calculate and optimize the buffer zone sizes with the determination of the buffer size of  the existing resources in certain critical chain management so as to shorten the cycle..

  10. A fuzzy pert approach to evaluate plant construction project scheduling risk under uncertain resources capacity

    Directory of Open Access Journals (Sweden)

    Hsian Jong Hsiau

    2009-07-01

    Full Text Available A plant construction project always involves lots of activities. Precise information about the activities duration is unfortunately unavailable due to the uncertain resources capacity. The fuzzy program evaluation and review technique (PERT has been widely applied to solve the fuzzy project scheduling problem. This paper presents an extended fuzzy PERT approach with four major improvement aspects to support the construction project scheduling management: 1 Evaluate operation fuzzy times based on available working volumes, resources quantity and fuzzy capacity of resources, 2 Adopting a maximal alpha_i-level cut method to compare the fuzzy precedent activities times to determine the reasonable earliest starting times of each activity, 3 Using fuzzy algebra method instead of fuzzy subtraction method to compute the fuzzy latest starting times and 4 Developing a project scheduling risk index (PSRI to assist the decision maker to evaluate the project scheduling risk. Simulations experiments are conducted and demonstrated satisfactory results.

  11. The Use of Project Time Management Processes and the Schedule Performance of Construction Projects in Mexico

    Directory of Open Access Journals (Sweden)

    Rómel G. Solís-Carcaño

    2015-01-01

    Full Text Available Delays have been frequently reported as the cause of several conflicts that affect the different parties involved in construction projects. Project Time Management (PTM includes a number of planning and controlling processes that are recommended for complying with requirements related to project time. The study reported in this paper aimed at assessing the use of PTM processes and its relation with project schedule performance (i.e., timely completion. Seven PTM processes and seventy-seven tasks associated with them were identified from the literature that is globally relevant to project management. The study included the assessment of fourteen school construction projects executed by a public agency in the Yucatan Peninsula, Mexico. These projects were monitored during the construction phase in order to measure two different variables: the use of processes related to PTM (i.e., schedule planning and controlling processes and the project schedule performance. For each of these projects a Use Index was obtained for assessing the first variable, while the Schedule Performance Index and the Schedule Variance were computed to assess the second one. The results demonstrated there is statistical dependence between these two variables. Most of the projects that attained timely completion also made a greater use of the PTM processes.

  12. a Quadtree Organization Construction and Scheduling Method for Urban 3d Model Based on Weight

    Science.gov (United States)

    Yao, C.; Peng, G.; Song, Y.; Duan, M.

    2017-09-01

    The increasement of Urban 3D model precision and data quantity puts forward higher requirements for real-time rendering of digital city model. Improving the organization, management and scheduling of 3D model data in 3D digital city can improve the rendering effect and efficiency. This paper takes the complexity of urban models into account, proposes a Quadtree construction and scheduling rendering method for Urban 3D model based on weight. Divide Urban 3D model into different rendering weights according to certain rules, perform Quadtree construction and schedule rendering according to different rendering weights. Also proposed an algorithm for extracting bounding box extraction based on model drawing primitives to generate LOD model automatically. Using the algorithm proposed in this paper, developed a 3D urban planning&management software, the practice has showed the algorithm is efficient and feasible, the render frame rate of big scene and small scene are both stable at around 25 frames.

  13. Construction schedule simulation of a diversion tunnel based on the optimized ventilation time.

    Science.gov (United States)

    Wang, Xiaoling; Liu, Xuepeng; Sun, Yuefeng; An, Juan; Zhang, Jing; Chen, Hongchao

    2009-06-15

    Former studies, the methods for estimating the ventilation time are all empirical in construction schedule simulation. However, in many real cases of construction schedule, the many factors have impact on the ventilation time. Therefore, in this paper the 3D unsteady quasi-single phase models are proposed to optimize the ventilation time with different tunneling lengths. The effect of buoyancy is considered in the momentum equation of the CO transport model, while the effects of inter-phase drag, lift force, and virtual mass force are taken into account in the momentum source of the dust transport model. The prediction by the present model for airflow in a diversion tunnel is confirmed by the experimental values reported by Nakayama [Nakayama, In-situ measurement and simulation by CFD of methane gas distribution at a heading faces, Shigen-to-Sozai 114 (11) (1998) 769-775]. The construction ventilation of the diversion tunnel of XinTangfang power station in China is used as a case. The distributions of airflow, CO and dust in the diversion tunnel are analyzed. A theory method for GIS-based dynamic visual simulation for the construction processes of underground structure groups is presented that combines cyclic operation network simulation, system simulation, network plan optimization, and GIS-based construction processes' 3D visualization. Based on the ventilation time the construction schedule of the diversion tunnel is simulated by the above theory method.

  14. Opinions of the Construction Schedule Control%基于建筑施工进度控制之见解

    Institute of Scientific and Technical Information of China (English)

    陈建文; 俞海峰

    2013-01-01

      建筑工程具有量大、复杂、周期长等特点,这就决定了施工进度要受诸多因素的影响。要想有效控制施工进度,就必须全面分析影响施工进度的因素,确定合理的进度控制目标,编制可行的进度计划。%The construction project has the characteristics like large quantity, complex, long period and so on, which determi-ne the schedule of construction would be influenced by many factors. In order to effectively control the construction schedul-e, it must have a comprehensive analysis of the factors affecti-ng the construction schedule, to determine the reasonable sche-dule control target, making feasible schedule.

  15. Application of Project Scheduling in Agriculture (Case Study: Mechanized Greenhouses Construction Project

    Directory of Open Access Journals (Sweden)

    Nasim Monjezi

    2012-02-01

    Full Text Available PERT is an acronym for Project Evaluation and Review Technique. It provides a method of modeling, simulating and solving a wide range of simplex large-scale system problems. In this paper, project scheduling in agriculture, for mechanized greenhouses construction in the Khuzestan province of Iran, is carried out by PERT method. The operation of allocating resources to activities was carried out by means of breaking the basic activities of the project into smaller ones. Network models are increasingly powerful tool for modeling, scheduling, planning, controlling, and analyzing of agricultural projects. The generated PERT network model is a powerful tool to help manager who could able to make optimum decision.

  16. 48 CFR 53.301-1427 - Standard Form 1427, Inventory Schedule A-Construction Sheet (Metals in Mill Product Form).

    Science.gov (United States)

    2010-10-01

    ... 48 Federal Acquisition Regulations System 2 2010-10-01 2010-10-01 false Standard Form 1427, Inventory Schedule A-Construction Sheet (Metals in Mill Product Form). 53.301-1427 Section 53.301-1427... Illustrations of Forms 53.301-1427 Standard Form 1427, Inventory Schedule A—Construction Sheet (Metals in...

  17. Definition of "positional isomer" as it pertains to the control of schedule I controlled substances. Final rule.

    Science.gov (United States)

    2007-12-03

    On May 25, 2006, DEA published a Notice of Proposed Rulemaking which proposed the addition of a specific definition for the term "positional isomer" to allow for the systematic determination of which isomers of schedule I substances would be considered to be "positional," and therefore, subject to schedule I control. This rulemaking finalizes that definition. The Controlled Substances Act (CSA) and its implementing regulations specify which hallucinogenic substances are considered schedule I controlled substances. The CSA states that all salts, isomers, and salts of isomers of these substances are also schedule I controlled substances. In non-technical terms, an isomer of a substance is a different compound, but a compound which has the same number and kind of atoms. The terms "optical isomer" and "geometric isomer" are specific scientific terms and it is easy to determine whether one substance is an optical or geometric isomer of another. The term "positional isomer," however, is subject to scientific interpretation. The addition of a definition for the term "positional isomer" will assist legitimate research[ers] and industry in determining the control status of materials that are "positional isomers" of schedule I hallucinogens. While the DEA will remain the authority for ultimately determining the control status of a given material, providing a specific definition for "positional isomer" will ensure consistent criteria are utilized in making these determinations. This rule does not change existing laws, regulations, policies, processes, and procedures regarding the determination of control status for schedule I hallucinogenic substances. This rule merely makes available to the public the longstanding definition of "positional isomer" which DEA has used when making these scheduling determinations. This rule is relevant only to specialized forensic or research chemists. Most of these individuals are existing DEA registrants who are authorized by the DEA to handle

  18. Complete fuzzy scheduling and fuzzy earned value management in construction projects

    Institute of Scientific and Technical Information of China (English)

    José Luís PONZ-TIENDA; Eugenio PELLICER; Víctor YEPES

    2012-01-01

    This paper aims to present a comprehensive proposal for project scheduling and control by applying fuzzy eamed value.It goes a step further than the existing literature:in the formulation of the fuzzy earned value we consider not only its duration,but also cost and production,and alternatives in the scheduling between the earliest and latest times.The mathematical model is implemented in a prototypical construction project with all the estimated values taken as fuzzy numbers.Our findings suggest that different possible schedules and the fuzzy arithmetic provide more objective results in uncertain environments than the traditional methodology.The proposed model allows for controlling the vagueness of the environment through the adjustment of the a-cut,adapting it to the specific circumstances of the project.

  19. An Improved Multiobjective PSO for the Scheduling Problem of Panel Block Construction

    Directory of Open Access Journals (Sweden)

    Zhi Yang

    2016-01-01

    Full Text Available Uncertainty is common in ship construction. However, few studies have focused on scheduling problems under uncertainty in shipbuilding. This paper formulates the scheduling problem of panel block construction as a multiobjective fuzzy flow shop scheduling problem (FSSP with a fuzzy processing time, a fuzzy due date, and the just-in-time (JIT concept. An improved multiobjective particle swarm optimization called MOPSO-M is developed to solve the scheduling problem. MOPSO-M utilizes a ranked-order-value rule to convert the continuous position of particles into the discrete permutations of jobs, and an available mapping is employed to obtain the precedence-based permutation of the jobs. In addition, to improve the performance of MOPSO-M, archive maintenance is combined with global best position selection, and mutation and a velocity constriction mechanism are introduced into the algorithm. The feasibility and effectiveness of MOPSO-M are assessed in comparison with general MOPSO and nondominated sorting genetic algorithm-II (NSGA-II.

  20. An Optimal CDS Construction Algorithm with Activity Scheduling in Ad Hoc Networks

    Science.gov (United States)

    Penumalli, Chakradhar; Palanichamy, Yogesh

    2015-01-01

    A new energy efficient optimal Connected Dominating Set (CDS) algorithm with activity scheduling for mobile ad hoc networks (MANETs) is proposed. This algorithm achieves energy efficiency by minimizing the Broadcast Storm Problem [BSP] and at the same time considering the node's remaining energy. The Connected Dominating Set is widely used as a virtual backbone or spine in mobile ad hoc networks [MANETs] or Wireless Sensor Networks [WSN]. The CDS of a graph representing a network has a significant impact on an efficient design of routing protocol in wireless networks. Here the CDS is a distributed algorithm with activity scheduling based on unit disk graph [UDG]. The node's mobility and residual energy (RE) are considered as parameters in the construction of stable optimal energy efficient CDS. The performance is evaluated at various node densities, various transmission ranges, and mobility rates. The theoretical analysis and simulation results of this algorithm are also presented which yield better results. PMID:26221627

  1. 7 CFR 1780.3 - Definitions and grammatical rules of construction.

    Science.gov (United States)

    2010-01-01

    ... 7 Agriculture 12 2010-01-01 2010-01-01 false Definitions and grammatical rules of construction... and Requirements § 1780.3 Definitions and grammatical rules of construction. (a) Definitions. For the... bonds means bonds which have equal standing with other bonds of the same Issuer. Poverty line means the...

  2. Solution-Guided Multi-Point Constructive Search for Job Shop Scheduling

    CERN Document Server

    Beck, J C

    2011-01-01

    Solution-Guided Multi-Point Constructive Search (SGMPCS) is a novel constructive search technique that performs a series of resource-limited tree searches where each search begins either from an empty solution (as in randomized restart) or from a solution that has been encountered during the search. A small number of these "elite solutions is maintained during the search. We introduce the technique and perform three sets of experiments on the job shop scheduling problem. First, a systematic, fully crossed study of SGMPCS is carried out to evaluate the performance impact of various parameter settings. Second, we inquire into the diversity of the elite solution set, showing, contrary to expectations, that a less diverse set leads to stronger performance. Finally, we compare the best parameter setting of SGMPCS from the first two experiments to chronological backtracking, limited discrepancy search, randomized restart, and a sophisticated tabu search algorithm on a set of well-known benchmark problems. Results d...

  3. Explore the Construction Project Schedule Management Measures%建筑工程进度管理措施研究

    Institute of Scientific and Technical Information of China (English)

    蒋立

    2014-01-01

    With the rapid development of social economy, construction industry is facing the fierce market competition. Construction project schedule is a very important indicator to measure the comprehensive ability of the state-owned enterp-rises, so in the construction engineering, effective measures must be taken to improve the level of construction project schedule management and ensure the project completed on schedule.%随着社会经济的快速发展,建筑行业面临着激烈的市场竞争。建筑工程进度是对企业的综合能力进行衡量的一项非常重要的指标,所以在建筑工程中,必须采取有效措施来提高建筑工程进度管理水平,保证工程如期完成。

  4. Resource management and job scheduling of China earthquake grid experiment system:Construction of resource management and job dynamic scheduling model ProRMJS

    Institute of Scientific and Technical Information of China (English)

    HOU Jian-min; LIU Rui-feng; SHAN Bao-hua; ZHAO Yong; NIU Ai-jun; ZOU Li-ye; HOU Li-hua; HAN-Jun

    2006-01-01

    Grid technique is taken as the third generation intemet technology and resource management is the core of it.Aiming at the problems of resource management of CEDAGrid (China Earthquake Disaster Alleviation and Simulation Grid) in its preliminary construction, this paper presents a resource management and job scheduling model:ProRMJS to solve these problems. For platform supposed agreeably each computing node can provide computation service, ProRMJS uses "computation pool" to support scheduler, and then the scheduler allocates jobs dynamically according to computing capability and status of each node to ensure the stability of the platform. At the same time, ProRMJS monitors the status of job on each node and sets a time threshold to manage the job scheduling. By estimating the computing capability of each node, ProRMJS allocates jobs on demand to solve the problem of supposing each node can finish the job acquiescently. When calculating the computing capability of each node,ProRMJS allows for the various factors that affect the computing capability and then the efficiency of the platform is improved. Finally the validity of the model is verified by an example.

  5. Resource management and job scheduling of China earthquake grid experiment system: Construction of resource management and job dynamic scheduling model ProRMJS

    Science.gov (United States)

    Hou, Jian-Min; Liu, Rui-Feng; Shan, Bao-Hua; Zhao, Yong; Niu, Ai-Jun; Zou, Li-Ye; Hou, Li-Hua; Han, Jun

    2006-11-01

    Grid technique is taken as the third generation internet technology and resource management is the core of it. Aiming at the problems of resource management of CEDAGrid (China Earthquake Disaster Alleviation and Simulation Grid) in its preliminary construction, this paper presents a resource management and job scheduling model: ProRMJS to solve these problems. For platform supposed agreeably each computing node can provide computation service, ProRMJS uses “computation pool” to support scheduler, and then the scheduler allocates jobs dynamically according to computing capability and status of each node to ensure the stability of the platform. At the same time, ProRMJS monitors the status of job on each node and sets a time threshold to manage the job scheduling. By estimating the computing capability of each node, ProRMJS allocates jobs on demand to solve the problem of supposing each node can finish the job acquiescently. When calculating the computing capability of each node, ProRMJS allows for the various factors that affect the computing capability and then the efficiency of the platform is improved. Finally the validity of the model is verified by an example.

  6. Constructing an Interdisciplinary Context for Definition of Life

    Science.gov (United States)

    Tsokolov, S. A.

    One of the main problems in understanding life is that that lifecannot be defined as a self-evident phenomenon. Instead, definitions of life inevitably depend on the context: social, ethical, theological, and scientific. Even in a purely scientific context, different scientific disciplines and approaches provide a variety of criteria related to life. My intention is to define life in an interdisciplinary context, where the class of living systems can be presented as a particular case in series of systems: physical, chemical, prebiotic, biotic, ecological, social, cognitive, etc. related by a universal principle. To this end, the first step in establishing general criteria for life is to define the essential features of life processes. The very functional principle of living beings is circular organization (feedback circularity) embedded on different levels of organization: molecular, genetic, cellular, neural, behavioural, mental, and social. Understanding that the degree of system's wholeness, i.e. degree of feedback net integration can serve as a primary parameter, we can in principle construct an interdisciplinary context in which different systems including living beings can be analyzed, defined and compared.

  7. Risk Level Assessment in Construction Projects Using the Schedule Performance Index

    Directory of Open Access Journals (Sweden)

    Roberto Barbosa dos Santos

    2016-01-01

    Full Text Available Construction projects are risky in both physical implementation and management. The characteristics of the risk reinforce the necessity of efficient management to increase the chances of success without commitment to its goals. This study explores the correlation of delay and the schedule performance index (SPI to evaluate the risk of a construction project completed with time overruns. The hypothesis that the SPI of projects with a delay is distinct from those projects without a delay is assumed. A database with 19 elements was used to test this hypothesis and to calculate limit values to the SPI. Therefore, the risk of delay will be small when the observed SPI is greater than the superior limit and large when the SPI is below the inferior limit. The simplicity involved in the calculation of these values showed an advantage in comparison with other methods of risk evaluation. Another strong point observed is that any company can determine the value of risk by considering its own history and support decisions like doing corrective actions.

  8. Diving pattern and work schedule of construction well divers in Taiwan.

    Science.gov (United States)

    Huang, K L; Lee, H C; Huang, G B; Lin, T F; Niu, K C; Liou, S H; Lin, Y C

    1998-01-01

    Construction well divers in Taiwan reportedly suffer a high prevalence of dysbaric osteonecrosis. We studied five divers working at the same construction site. We recorded their diving methods, diving depths, bottom times, work patterns, water temperatures, and heart rates. We also monitored gas bubbles in the subclavian vein in selected dives. A crude but effective hot-water system protected divers against hypothermia and allowed them to work in 24 degrees-27 degrees C water. Divers worked approximately 6.6 h a day and progressed approximately 3.0 m a day while excavating an average of 148 buckets of sand and rock each weighing 49.5 kg. The divers sustained a heart rate increase of 49%. Sixty percent of their equivalent single dive bottom times exceeded the U.S. Navy's no-decompression limits. Two cases of venous bubbles were detected, and one of these divers showed symptoms of decompression sickness. The prolonged bottom time and lack of a decompression schedule probably contributed to a risk of decompression sickness and dysbaric osteonecrosis.

  9. 12 CFR 226.2 - Definitions and rules of construction.

    Science.gov (United States)

    2010-01-01

    ... obligations arising from the issuance of such a credit card to another person. (9) Cash price means the price... obligations arising from the issuance of such a credit card to another person. (9) Cash price means the price...) Definitions. For purposes of this regulation, the following definitions apply: (1) Act means the Truth in...

  10. Integrated Cost and Schedule Control Systems for Nuclear Power Plant Construction: Leveraging Strategic Advantages to Owners and EPC Firms

    Directory of Open Access Journals (Sweden)

    Youngsoo Jung

    2015-01-01

    Full Text Available As the owners expect that the cost and time for nuclear power plant construction would decrease with new entrants into the market, there will be severer competition in the nuclear industry. In order to achieve performance improvement and to attain competitive advantages under the globalized competition, practitioners and researchers in the nuclear industry have recently exerted efforts to develop an advanced and efficient management methodology for the nuclear mega-projects. Among several candidates, integrated cost and schedule control system is of great concern because it can effectively manage the three most important project performances including cost, time, and quality. In this context, the purpose of this paper is to develop a project numbering system (PNS of integrated cost and schedule control system for nuclear power plant construction. Distinct attributes of nuclear power plant construction were investigated first in order to identify influencing variables that characterize real-world implementation of advanced cost and schedule controls. A scenario was then developed and analysed to simulate a case-project. By using this case-project, proposed management requirements, management methods, measurement techniques, data structure, and data collection methods for integrated cost and schedule PNS were illustrated. Finally, findings and implications are outlined, and recommendations for further research are presented.

  11. 10 CFR Appendix D to Part 2 - Schedule for the Proceeding on Consideration of Construction Authorization for a High-Level Waste...

    Science.gov (United States)

    2010-01-01

    .... D Appendix D to Part 2—Schedule for the Proceeding on Consideration of Construction Authorization... 10 Energy 1 2010-01-01 2010-01-01 false Schedule for the Proceeding on Consideration of Construction Authorization for a High-Level Waste Geologic Repository. D Appendix D to Part 2 Energy...

  12. On the Construction Project Schedule Control%浅析建筑工程项目进度控制

    Institute of Scientific and Technical Information of China (English)

    刘子永; 李蕴澎

    2014-01-01

    本文通过对建设工程进度控制内涵、目标的阐述,详细分析了影响建设工程进度的各种因素,在此基础上对进度控制的组织、技术、经济、合同等具体的控制措施进行了非常详尽的分析,针对建设工程实施阶段进度控制的主要任务做出了概括总结,在实施中取得了良好的成效。%Based on elaborating the content and goals of construction schedule control, this paper analyzes various factors that affect the construction schedule, on this basis to analyze specific control measures of schedule control in organization, technology, economy, contracts, etc., summarizes main task of schedule control in project implementation, and achieves good results in the implementation.

  13. Constructing Knowledge about the Notion of Limit in the Definition of the Horizontal Asymptote

    Science.gov (United States)

    Kidron, Ivy

    2011-01-01

    Processes of knowledge construction are investigated. A learner is constructing knowledge about the notion of limit in the definition of the horizontal asymptote. The analysis is based on the dynamically nested epistemic action model for abstraction in context. Different tasks are offered to the learner. In her effort to perform the different…

  14. 试论建筑工程进度管理的思路%Discussion on the idea of construction engineering schedule management

    Institute of Scientific and Technical Information of China (English)

    赵美玲

    2015-01-01

    Through the analysis on the factors influence of construction engineering schedule,from resources supply in construction,schedule and plan adjustment,safety management,construction organization and other angle analyzed the idea of construction engineering schedule manage-ment,to strengthen the management of construction engineering schedule,so as to realize the balance of cycle and cost.%通过分析影响建筑工程进度的因素,从施工所需资源供给、进度计划调整、安全管理、施工组织等角度分析了建筑工程进度管理的思路,以加强对建筑施工进度的管理,从而实现周期和成本之间的平衡。

  15. Personnel scheduling

    OpenAIRE

    Vanden Berghe, Greet

    2012-01-01

    Personnel scheduling can become a particularly difficult optimisation problem due to human factors. And yet: people working in healthcare, transportation and other round the clock service regimes perform their duties based on a schedule that was often manually constructed. The unrewarding manual scheduling task deserves more attention from the timetabling community so as to support computation of fair and good quality results. The present abstract touches upon a set of particular characterist...

  16. A Framework for Augmenting 4D Visualization of Construction Projects with Scheduling Uncertainties

    NARCIS (Netherlands)

    Vahdatikhaki, Faridaddin; Mawlana, Mohammed

    2017-01-01

    Along with the advent of Building Information Modeling (BIM) came the rising popularity of visualizing not only the product of a project but also the underlying activities leading to such products. For this purpose, the schedule of a project is coupled with its 3D model to visualize how different co

  17. 75 FR 74719 - Auction of VHF Commercial Television Station Construction Permits Scheduled for February 15, 2011...

    Science.gov (United States)

    2010-12-01

    ...://wireless.fcc.gov/auctions/90/ . I. General Information A. Introduction 1. The Wireless Telecommunications... scheduled to begin on February 15, 2011. FOR FURTHER INFORMATION CONTACT: Wireless Telecommunications Bureau... channels in New Jersey and Delaware. The first allotment is channel 4 in Atlantic City, New Jersey and...

  18. 园林工程项目施工进度管理研究%Study on Construction Schedule Management of Landscape Engineering Project

    Institute of Scientific and Technical Information of China (English)

    樊松丽; 李梅

    2013-01-01

    分析园林工程施工特点,总结施工进度影响因素,提出园林工程施工进度管理目标和内容,指出为保证施工进度管理目标顺利实现,必须做好事前计划、事中控制、事后补救,采取有效的进度管理方法。%This paper analysed the construction characteristics of landscape engineering ,construction progress influencing factors were summarized.Target and content of construction schedule management were proposed.In order to ensure the realization of construction schedule management goals , schedule plan must be made beforehand and controlled during the matter and help after the mat -ter.Relevant schedule management method should be taken.

  19. Construction scheduled delay risk assessment by using combined AHP-RII methodology for an international NPP project

    Energy Technology Data Exchange (ETDEWEB)

    Hossen, Mufazal Muhammed; Kang, Sun Koo; Kim, Jong Hyun [KEPCO International Nuclear Graduate School (KINGS), Ulsan (Korea, Republic of)

    2015-04-15

    In this study, Nuclear Power Plant (NPP) construction schedule delay risk assessment methodology is developed and the construction delay risk is assessed for turnkey international NPP projects. Three levels of delay factors were selected through literature review and discussions with nuclear industry experts. A questionnaire survey was conducted on the basis of an analytic hierarchy process (AHP) and Relative Importance Index (RII) methods and the schedule delay risk is assessed qualitatively and quantitatively by severity and frequency of occurrence of delay factors. This study assigns four main delay factors to the first level: main contractor, utility, regulatory authority, and financial and country factor. The second and the third levels are designed with 12 sub-factors and 32 sub-sub-factors, respectively. This study finds the top five most important sub-sub-factors, which are as follows: policy changes, political instability and public intervention; uncompromising regulatory criteria and licensing documents conflicting with existing regulations; robust design document review procedures; redesign due to errors in design and design changes; and worldwide shortage of qualified and experienced nuclear specific equipment manufacturers. The proposed combined AHP-RII methodology is capable of assessing delay risk effectively and efficiently. Decision makers can apply risk informed decision making to avoid unexpected construction delays of NPPs.

  20. Project scheduling method with time using MRP system – A case study: Construction project in Libya

    Directory of Open Access Journals (Sweden)

    Abdallah Ali Imetieg

    2015-04-01

    Full Text Available Materials Requirements and Planning (MRP is a system of production planning and inventory control, which is used to manage manufacturing processes. Most MRP systems are software-based and are used to ensure that the materials are available for production, that the products are available for delivery to customers, that the lowest possible material and product level is maintained in store, as well as to plan delivery schedules and purchasing activities. Upon completion of scheduling, begins the process of follow-up, which includes the achievement of the project goals in terms of quantity, quality and costs in accordance with deadlines. MRP system was applied to project of 5000 housing units in Solug area, which is close to Benghazi city, Libya, with the aim to provide necessary cash flow to pay dues on time without delay to all involved project sub-contractors and material suppliers, to ensure the smooth flow of operations, as well as to diminish costs by reduction of temporary storages and rented areas. There is a correlation between time and cost of each activity. If the required time is shorter than the scheduled time of the certain activity, it would demand more resources, which further leads to the increase in direct costs of the given activity. Therefore, the output of MRP is important since commands are issued through planning in order to launch the suggested orders with the required quantities and within the limited time period.

  1. Construction and validation of the South African version of the Fear Survey Schedule for Children: an exploratory factor analysis.

    Science.gov (United States)

    Burkhardt, Käthe; Loxton, Helene; Kagee, Ashraf; Ollendick, Thomas H

    2012-09-01

    The Fear Survey Schedule for Children-Revised (Ollendick, 1983) is an 80-item self-report instrument that has been used internationally to asses the number of fears and general level of fearfulness among children. Despite its widespread use, this instrument has not been adapted to the South African context. The present study addressed this gap by means of a 2-phase investigation aimed at developing a South African version of the instrument. In Phase 1, semistructured interviews were conducted with 40 children (7 to 13 years of age). Qualitative data obtained from these interviews were used to construct additional items for inclusion in the South African Fear Survey Schedule for Children-Revised. The modified scale, consisting of 97 items, was then administered to a sample of 646 children between the ages of 7 and 13 years. Further psychometric considerations resulted in the final version of the scale consisting of 74 items with high internal consistency (α=.97). The factor structure was explored by means of principal component analysis with varimax rotation and a 5-factor solution was found to provide the best conceptual fit. The factors identified were as follows: Fear of Death and Danger; Fear of the Unknown; Fear of Small Animals and Minor Threats to Self; Large Animal Fears; and Situational Fears. Differences between the South African version and the original Fear Survey Schedule for Children-Revised are noted and implications for the study of fear in South Africa and other countries are discussed.

  2. VA Construction: Improved Processes Needed to Monitor Contract Modifications, Develop Schedules, and Estimate Costs

    Science.gov (United States)

    2017-03-01

    that designs should avoid costly and unwarranted architectural and engineering embellishments and unnecessary construction and maintenance expenses ...relevant data taken from the existing contract, remaining construction work, and cost information from other hospitals . Credible A cost estimate is...Office of Management and Budget Circular A-11 states that the cost of a capital asset such as a new hospital is its full life-cycle cost, which

  3. 谈施工阶段进度计划的对比与调整%Comparison and Adjustment of Progress Schedules in Construction Stage

    Institute of Scientific and Technical Information of China (English)

    郝国鹏; 吴文平

    2011-01-01

    In a project construction,the construction schedule control is one of the three control objectives of an engineering construction as quality control and cost control.Under the condition of ensuring the project safety and quality,to expedite the construction schedule in order to make the project be completed and used ahead of time,and play a role in engineering functions and investment benefits as early as possible,is the common aspiration of all construction organizations.Because the construction stage has an important factor affecting on the construction schedule,the factors that affect the construction schedule are discussed here firstly.Then the comparison of actual progress and scheduled progress in construction stage and the adjustment method of progress schedule are also introduced emphatically and by combining with practical cases.%工程建设进度控制是工程项目建设中与质量控制、成本控制并列为工程建设控制的三大目标之一。在保证工程安全、质量的前提下,加快施工进度使得工程早竣工、早使用,尽早发挥工程使用功能和投资效益,是所有施工单位的共同愿望。施工阶段对工程进度的影响十分重要,本文从影响施工进度的因素谈起,着重介绍了施工阶段实际进度与计划进度的对比与进度计划的调整方法,并结合实际案例进行了探讨。

  4. 建筑工程施工进度的控制及管理%Building engineering construction schedule control and management

    Institute of Scientific and Technical Information of China (English)

    牛章红

    2016-01-01

    从施工人员、材料设备、施工环境等方面,分析了影响建筑工程施工进度的主要因素,并根据建筑工程施工进度的控制原理,阐述了实际工程进度的编制措施,从而确保项目的顺利完工。%Starting from aspects of construction staff,material equipment and construction environment,the paper analyzes major factors influen-cing building engineering construction schedule. According to building engineering construction schedule controlling principles,it describes actu-al engineering schedule compiling measures,so as to guarantee the smooth completion of the project.

  5. 48 CFR 6101.1 - Scope of rules; definitions; construction; rulings, orders, and directions; panels; location and...

    Science.gov (United States)

    2010-10-01

    ... ADMINISTRATION CONTRACT DISPUTE CASES 6101.1 Scope of rules; definitions; construction; rulings, orders, and...; definitions; construction; rulings, orders, and directions; panels; location and address . 6101.1 Section 6101...; appellant. The term “appeal” means a contract dispute filed with the Board. The term “appellant” means a...

  6. On the Schedule Control of Large Metallurgical Construction Engineering Projects%大型冶金建设工程项目进度控制研究

    Institute of Scientific and Technical Information of China (English)

    孙忠林

    2015-01-01

    It has important practical significance for improving the metallurgical construction quality level and controlling construction investment to research the schedule control of large metallurgical construction engineering projects.%研究大型冶金建设工程项目进度控制对提高冶金建设质量水平、控制建设投资具有重要的现实意义。

  7. Construction of the Project Schedule Management%工程项目进度管理建设初探

    Institute of Scientific and Technical Information of China (English)

    袁洁

    2011-01-01

    工程项目建设进度受诸多因素影响,这就要求工程项目管理人员在事先对影响进度的各种因素进行全面调查研究,预测、评估这些因素对工程建设进度产生的影响,并编制可行的进度计划。采取各种赶工措施使工程建设项目及早竣工,尽快发挥工程建设投资的经济效益。本文所提及的仅仅是一些定性分析,也是个人一种认识,其中还有许多问题有待深入探讨和研究。%The project construction schedule affected by many factors,which requires project management personnel in advance of the various factors that affect the progress of a comprehensive research,forecasting,assessment of these factors on the impact of the construction progress and the progress of preparation of a viable plan.Take various measures to make up the works of construction projects completed as early as possible,as soon as possible to play the economic benefits of investment in construction.This paper mentioned only some of the qualitative analysis,but also an understanding person,of which there are many issues to be further explored and examined.

  8. Lead Coolant Test Facility Technical and Functional Requirements, Conceptual Design, Cost and Construction Schedule

    Energy Technology Data Exchange (ETDEWEB)

    Soli T. Khericha

    2006-09-01

    This report presents preliminary technical and functional requirements (T&FR), thermal hydraulic design and cost estimate for a lead coolant test facility. The purpose of this small scale facility is to simulate lead coolant fast reactor (LFR) coolant flow in an open lattice geometry core using seven electrical rods and liquid lead or lead-bismuth eutectic. Based on review of current world lead or lead-bismuth test facilities and research need listed in the Generation IV Roadmap, five broad areas of requirements of basis are identified: Develop and Demonstrate Prototype Lead/Lead-Bismuth Liquid Metal Flow Loop Develop and Demonstrate Feasibility of Submerged Heat Exchanger Develop and Demonstrate Open-lattice Flow in Electrically Heated Core Develop and Demonstrate Chemistry Control Demonstrate Safe Operation and Provision for Future Testing. These five broad areas are divided into twenty-one (21) specific requirements ranging from coolant temperature to design lifetime. An overview of project engineering requirements, design requirements, QA and environmental requirements are also presented. The purpose of this T&FRs is to focus the lead fast reactor community domestically on the requirements for the next unique state of the art test facility. The facility thermal hydraulic design is based on the maximum simulated core power using seven electrical heater rods of 420 kW; average linear heat generation rate of 300 W/cm. The core inlet temperature for liquid lead or Pb/Bi eutectic is 420oC. The design includes approximately seventy-five data measurements such as pressure, temperature, and flow rates. The preliminary estimated cost of construction of the facility is $3.7M. It is also estimated that the facility will require two years to be constructed and ready for operation.

  9. 建筑施工进度管理的重要性及管理措施%The importance and measures of construction schedule management

    Institute of Scientific and Technical Information of China (English)

    李永明

    2015-01-01

    随着我国社会经济的快速发展,特别是城市化建设的不断深入,建筑行业得到了长足的发展。在建筑工程施工过程中,有效的管理是提升施工企业综合竞争力的有效手段,而进度管理是施工管理中重要的组成部分,是建筑项目管理的核心。加强企业进度管理,不仅能够规范施工操作,提升工程施工质量,确保施工的安全,同时能够保证在规定施工工期内完工,确保施工企业履行施工合同中的相关要求。可以说施工进度管理是建筑工程项目成功的关键,本文首先分析建筑工程施工进度管理的重要性,然后分析影响建筑施工进度的主要因素,最后提出加强建筑工程施工进度管理的有效措施,供有关人员参考。%with the rapid social and economic development of our country,especially urban construction unceasingly thorough,the construction industry has been considerable development.In the building construction process,effective management is the effective means to enhance the comprehensive competitiveness of the construction enterprises,and schedule management is an important part of construction management,is the core of construction project management.Strengthen the enterprise process management,can not only standardized construction, improve construction quality,ensure the safety of construction,at the same time to ensure completion of provisions in the construction period,ensure the construction enterprises to fulfill the relevant requirements of the construction contract.It can be said that the construction schedule management is the key of construction project success,this paper first analyzes the importance of construction schedule management of construction engineering, and then analyzes the main factors affecting the progress of construction, finally put forward effective measures to strengthen the management of construction schedule for the project,relevant personnel

  10. Cost and schedule estimate to construct the tunnel and shaft remedial shielding concept, Los Alamos Meson Physics Facility, Los Alamos National Laboratory, Los Alamos, New Mexico. Final report

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1993-11-30

    The report provides an estimate of the cost and associated schedule to construct the tunnel and shaft remedial shielding concept. The cost and schedule estimate is based on a preliminary concept intended to address the potential radiation effects on Line D and Line Facilities in event of a beam spill. The construction approach utilizes careful tunneling methods based on available excavation and ground support technology. The tunneling rates and overall productivity on which the cost and project schedule are estimated are based on conservative assumptions with appropriate contingencies to address the uncertainty associated with geological conditions. The report is intended to provide supplemental information which will assist in assessing the feasibility of the tunnel and shaft concept and justification for future development of this particular aspect of remedial shielding for Line D and Line D Facilities.

  11. Explore the Effective Measures of the Construction Engineering Schedule Control%建筑工程进度控制的有效措施探究

    Institute of Scientific and Technical Information of China (English)

    雷霆

    2014-01-01

    施工进度是建筑工程工作的重要方面,本文以建筑工程施工进度的影响因素为切入点,对建筑工程进度控制的有效措施进行了探索和研究,以期为我国建筑事业的发展提供一些参考和借鉴。%The construction progress is an important part of construction engineering work. In this article, the author takes the influence factors of construction engineering schedule as the breakthrough point to explore and study the effective mea-sures of the construction engineering schedule control so as to provide some references for the development of Chinese bu-ilding industry.

  12. A Review of the Construct of Demoralization: History, Definitions, and Future Directions for Palliative Care.

    Science.gov (United States)

    Robinson, Sophie; Kissane, David W; Brooker, Joanne; Burney, Susan

    2016-02-01

    Demoralization has been the subject of discussion in relation to end-of-life care. It is characterized by hopelessness and helplessness due to a loss of purpose and meaning. The purpose of this review was to consolidate the conceptual understanding of demoralization and argue for its existence as a psychiatric syndrome. The history of the construct is explored, including the nature of existential distress and related psychological conditions that precipitate demoralization. Recent definitions of demoralization are described and differentiated from similar constructs. Future directions are highlighted, specifically in relation to the assessment, diagnosis, and treatment of demoralization in palliative care. Overall, demoralization is a clinically useful construct for those facing existential threat, guiding the clinician toward efforts to restore morale, meaning, and purpose.

  13. Discuss the Construction Schedule Control of Architectural Engineering%浅议建筑工程施工进度控制

    Institute of Scientific and Technical Information of China (English)

    崔秀芬

    2014-01-01

    工程施工进度管理在某种意义上反映了施工企业的管理水平与施工能力,同时也是提高建筑企业市场竞争的重要手段。本文主要分析了影响建筑施工进度管理的主要因素,并提出了加强工程施工进度管理的措施,以供读者参考。%Project construction schedule management reflects the management level and construction ability of construction enterprises in a sense, and it is also an important means to im-prove the market competition of construction enterprises. This paper mainly analyses the principal element influencing buil-ding construction schedule management, and puts forward me-asures to strengthen project construction schedule managem-ent .

  14. Construction Schedule Risk Factors Analysis and Judgment of Civil Engineering%土木工程施工进度风险因素分析与判断

    Institute of Scientific and Technical Information of China (English)

    赵春安; 赵剑

    2013-01-01

    随着我国经济的飞速发展,土木工程施工建设占有的位置越来越重要。其中土木工程施工进度风险是土木工程施工的重要影响因素。本文通过对土木工程施工进度风险影响因素的分析,提出一些关于控制土木工程施工进度风险因素的意见。%With the rapid development of our economy, civil engineering construction occupies the more and more impor-tant position. The civil engineering construction schedule risk is an important factor in the civil engineering construction. Th-is paper through the analysis of affecting risk factors on civil engineering construction schedule puts forward some factors to control the risk of civil engineering construction schedule.

  15. 双湖新城项目施工进度管理研究%Research on Construction Schedule Management of Shuanghu New Town Project

    Institute of Scientific and Technical Information of China (English)

    胡迎心

    2015-01-01

    With the increasing size and complexity of the construction project, the construction process becomes more complex.How to rea-sonably control the project schedule and achieve the best balance between duration, cost and quality becomes the extremely important target for construction management.With the 1# building of Shuanghu New Town project as an example, the schedule control of construction phase was taken as a research object.On the basis of actual project situation and the construction plan, we determine the construction peri-od and design the project schedule plan;at last we optimize the time limit for the project, all these will be adopted to realize the schedule goal.%随着建设项目的规模和难度不断加大,其施工过程也更加复杂,如何合理地控制项目进度,实现工期、成本和质量三者之间的最佳平衡,已为施工管理中一项极为重要的目标。本文以双湖新城三区1#楼为例,将该工程施工阶段的进度计划作为研究对象,依据工程现状和施工方案确定施工工期并设计项目进度计划方案,最后运用网络计划技术对工期进行优化,确保实现既定的工期目标。

  16. 谈公路工程施工进度与施工质量的关系%Discussion on the relation between highway engineering construction schedule and construction quality

    Institute of Scientific and Technical Information of China (English)

    王建生

    2012-01-01

    从工程建设中施工质量和进度的重要性入手,分析了公路工程项目中施工进度和质量的关系,并针对如何处理好质量与进度的关系进行了探讨,为创造高质量、高速度、高效益的精品工程奠定了理论基础。%To begin with the significance of engineering construction quality and schedule,the paper analyzes the relation between highway engineering project constructions schedule and quality,and explores how to do with the relation between the quality and schedule,which has laid theoretical foundation for creating fine projects with high quality,high speed,and high efficiency.

  17. 议建筑施工中的进度控制和质量控制%Analysis of the schedule control and quality control in construction

    Institute of Scientific and Technical Information of China (English)

    索南努布

    2014-01-01

    In this paper,interaction between the schedule control and quality control is discussed firstly,the elements and tasks of schedule con-trol and quality control are analyzed,the function of elements of schedule control and quality control is summarized in all the construction phase, which provides reference for practical engineering project management in future.%探讨了质量控制和进度控制的相互作用与关系,分析了进度控制和质量控制的要素和任务,并进一步总结了进度控制要素与质量控制要素在施工各阶段的作用,为工程项目管理工作提供参考。

  18. Tools and techniques for schedule's controlling: tracking system and control of Urucu-Manaus gas-pipeline construction, stretch B1

    Energy Technology Data Exchange (ETDEWEB)

    Zuany, Valdenise Marques; Dias, Jose Luiz Gomes [CONCREMAT Engenharia e Tecnologia S/A, Rio de Janeiro, RJ (Brazil)

    2009-07-01

    The goal is to show the monitoring systems and deadline control, using the PMBOK{sup R} project management tools, in the Construction and Assembly of the Coari-Manaus Gas-pipeline, stretch B1, which includes the cities of Coari, Codajas, Anori and Anama, in the state of Amazon, in the Northern Undertaking Implementation (IENOR), an Engineering division of the PETROBRAS System. This report presents the practical effects of the usage of three schedule control tools of the project: Performance Measurement, using the technique of the Earned Value Management (EVM), which integrates cost, schedule and physical progress of the enterprise to determine the variations of schedule and performance; Project Management Software, MSProject, which allows schedule's elaboration and makes the tracking of the planned dates possible (baseline) in relation to real dates and forecasts the trend level, the effects of changes in the project's schedule, demonstrating its utility as a schedule control tool; and Schedule Variance Analysis, which adopts practical data to reach the pessimistic, most likely and optimistic expectations. The implantation of these tools was based in the Work Breakdown Structure of the enterprise. The application of these three tools in the tracking and control of the enterprise demonstrates that, the use of information and techniques deriving from the planning and control can be an important support for project management and decision taking, comparing the results gotten in the implantation of the plan with its actual realization, defining, thus, the necessary corrective actions, generating learned lessons to use in future projects. (author)

  19. 如何加强建筑施工中的进度控制%How to Strengthen Schedule Control in Construction

    Institute of Scientific and Technical Information of China (English)

    刘丽敏

    2014-01-01

    Construction schedule management primarily based on the construction schedule plan identified in construction design to carry on comprehensive and integrated management, so as to ensure the smooth construction, it controlled the planned duration of the construction project within the target range of pre-determined period, and strived to shorten the construction period while taking into account the cost and quality control target.%建筑工程施工进度管理,主要是根据施工组织设计中确定的施工进度计划,从而进行全面的和综合性的管理,确保工程建设顺利进行。将建设项目的计划工期控制在事先确定的目标工期范围之内,并在兼顾费用、质量控制目标的同时努力缩短建设工期。

  20. Heuristics for identification of acronym-definition patterns within text: towards an automated construction of comprehensive acronym-definition dictionaries.

    Science.gov (United States)

    Wren, J D; Garner, H R

    2002-01-01

    To develop an automated, accurate and scalable method by which acronym-definition pairs can be identified within text. Its primary advantage is in enabling information processing methods to resolve author-defined acronyms, but it also allows an automated creation of a reference work on acronym definitions. This has several advantages over manual or semi-automated methods, besides time and effort saved, such as enabling identification of relative frequencies for alternate acronyms and definitions as well as spelling, phrasing and hyphenation variants for a unique acronym-definition pair. It also aids users in identifying acronym/definition variants present in the literature that may not necessarily be in biomedical databases. A set of heuristics to accurately locate and identify the boundaries of acronym-definition pairs was developed and refined in terms of precision and recall on subsets of MEDLINE records. These training sets were gradually increased in size and heuristics re-evaluated to ensure scalability. Our final set of Acronym Resolving General Heuristics (ARGH) had a sample-based estimated rate of 96.5 +/- 0.4% precision and 93.0 +/- 2.7% recall when tested on over 12 million MEDLINE records, identifying more than 174,000 unique acronyms and their 737,000 associated definitions. We estimate that as much as 36% of the acronyms in MEDLINE are associated with more than one definition and, conversely, up to 10% of definitions are associated with more than one acronym. The number of unique acronyms in MEDLINE is increasing at a rate of approximately 11,000 per year, while the number of definitions associated with them is growing at approximately four times that rate. Access to the ARGH database is available online at http://lethargy.swmed.edu/ARGH/argh.asp. The heuristic module and database are available upon request.

  1. 高校建设工程施工进度管理的特点及对策%Characteristics and Countermeasures of Construction Schedule Management in the University Construction Engineering

    Institute of Scientific and Technical Information of China (English)

    刘斌

    2011-01-01

    高校基建项目的特点对于工期控制提出了非常高的要求.因此,对高校建设工程施工进度管理进行研究有着非常重要的意义.本课题从高校基建工作的特点出发,通过对高校建设工程施工进度管理包括目标确立、任务分解、施工计划、过程追踪及分析调整等方面的调查研究,总结了高校建设工程施工进度管理的特点及对策.%The characteristics of university infrastmcture projects proposed a very high demand for the duration control. Therefore, it is very significant to study the schedule management in the construction progress. Starting from the characteristics of university infrastructure work, this paper studies the schedule management in construction progress including establishing goals, task decomposition, construction plans, process tracking and other aspects, and summarizes the features and countermeasures of schedule management in construction progress.

  2. Confusion, Lack of Consensus, and the Definition of Creativity as a Construct.

    Science.gov (United States)

    Parkhurst, Howard B.

    1999-01-01

    Reviews major areas of controversy concerning creativity's definition in chronological order corresponding to the publication of each definition of significant influence. Each definition's reasons for failing to achieve widespread acceptance are analyzed, and a suggestion for a general definition is provided. (Author/CR)

  3. Generation of bases with definite factorization for an n-qubit system and mutually unbiased sets construction

    Energy Technology Data Exchange (ETDEWEB)

    Garcia, A; Romero, J L; Klimov, A B, E-mail: klimov@cencar.udg.m [Departamento de Fisica, Universidad de Guadalajara, Revolucion 1500, 44420 Guadalajara, Jal. (Mexico)

    2010-09-24

    We propose a systematic procedure to construct all the possible bases with a definite factorization structure (eigenstates of n commuting monomials constructed as products of Pauli operators) for an n-qubit system, as well as the possibility of collecting them into mutually unbiased sets. We also discuss an algorithm for the determination of basis separability and propose a criteria for complementarity between such bases. The results are applied to generate non-isomorphic complete sets of mutually unbiased bases.

  4. Health Care and the Social Construction of AIDS: Impact of Disease Definitions on Psychosocial Adaptation and Economic Circumstances.

    Science.gov (United States)

    Crystal, Stephen; Jackson, Marguerite

    As with other illnesses, Acquired Immune Deficiency Syndrome (AIDS) is a socially constructed phenomenon, not simply a biological entity. Biologically, Human Immunodeficiency Virus (HIV) infection causes immunosuppression, which in turn causes a spectrum of disease states. The official definition of AIDS by the Centers for Disease Control requires…

  5. Q-Sort Definitions of Social Competence and Self-Esteem: Discriminant Validity of Related Constructs in Theory and Data.

    Science.gov (United States)

    Waters, Everett; And Others

    1985-01-01

    Two studies illustrating a methodology for describing similarities and distinctions between related constructs are reported. In Study 1, psychologists described behavioral and personality characteristics of preschool children through definitions of social competence and self-esteem using Q-set items. In Study 2, the relation between conceptual…

  6. Multimode resource-constrained multiple project scheduling problem under fuzzy random environment and its application to a large scale hydropower construction project.

    Science.gov (United States)

    Xu, Jiuping; Feng, Cuiying

    2014-01-01

    This paper presents an extension of the multimode resource-constrained project scheduling problem for a large scale construction project where multiple parallel projects and a fuzzy random environment are considered. By taking into account the most typical goals in project management, a cost/weighted makespan/quality trade-off optimization model is constructed. To deal with the uncertainties, a hybrid crisp approach is used to transform the fuzzy random parameters into fuzzy variables that are subsequently defuzzified using an expected value operator with an optimistic-pessimistic index. Then a combinatorial-priority-based hybrid particle swarm optimization algorithm is developed to solve the proposed model, where the combinatorial particle swarm optimization and priority-based particle swarm optimization are designed to assign modes to activities and to schedule activities, respectively. Finally, the results and analysis of a practical example at a large scale hydropower construction project are presented to demonstrate the practicality and efficiency of the proposed model and optimization method.

  7. On the construction safety and project schedule control%浅析施工安全与项目进度控制

    Institute of Scientific and Technical Information of China (English)

    李天平

    2015-01-01

    建筑施工中安全工作和施工的进度控制是团队的工作,不是个人的工作,安全工作和进度控制是复杂的系统化工程。企业的领导和公司的全体人员要加强安全工作和进度控制工作,要不断提高安全意识,要认真贯彻执行国家有关部门的各项规章制度,根据施工现场的现实情况要客观地工作,减少施工现场的事故发生。对于施工进度的控制也要按照国家有关部门的规定认真执行。%Progress of the construction work and construction safety control is a team work, not individual work, security work and schedule control is a complex systematic project. Business leaders and all the staff's work to strengthen the security and progress control work to continuously improve safety awareness, we should conscientiously implement the rules and regulations of national authorities, according to the construction site of the reality of the situation objectively,to reduce construction site the accident occurred. Should conscientiously implement the construction schedule for the control of national authorities in accordance with the provisions.

  8. The Self Care Assessment Schedule (SCAS)--I. The purpose and construction of a new assessment of self care behaviours.

    Science.gov (United States)

    Barnes, D; Benjamin, S

    1987-01-01

    The Self Care Assessment Schedule (SCAS) is a new questionnaire which measures the frequency of ten behaviours during a period of fourteen days. Data are presented for five patient samples and a group of non consulting controls and the distributions of scores between groups show expected differences. In some groups scores are significantly greater for male subjects and those with the most chronic disorders but scores are not related to age. It is tentatively suggested that the SCAS may be used to determine the severity of aspects of disability based on percentile scores.

  9. Proceedings of Workshop on Expert Systems for Construction Scheduling Held in Champaign, Illinois on 23-24 March 1987.

    Science.gov (United States)

    1987-08-01

    management systems. * Printing production: Expert Technolgies , Inc., is developing a prototype system for printers, including estimating of job costs...particular, such planning includes sequencing robot motions constrained by its mobility and operating characteristics and fed with its construction

  10. Construction schedule delay risk assessment by using combined AHP-RII methodology for an international NPP project

    Directory of Open Access Journals (Sweden)

    Muhammed Mufazzal Hossen

    2015-04-01

    The proposed combined AHP-RII methodology is capable of assessing delay risk effectively and efficiently. Decision makers can apply risk informed decision making to avoid unexpected construction delays of NPPs.

  11. Construction of 4D high-definition cortical surface atlases of infants: Methods and applications.

    Science.gov (United States)

    Li, Gang; Wang, Li; Shi, Feng; Gilmore, John H; Lin, Weili; Shen, Dinggang

    2015-10-01

    In neuroimaging, cortical surface atlases play a fundamental role for spatial normalization, analysis, visualization, and comparison of results across individuals and different studies. However, existing cortical surface atlases created for adults are not suitable for infant brains during the first two postnatal years, which is the most dynamic period of postnatal structural and functional development of the highly-folded cerebral cortex. Therefore, spatiotemporal cortical surface atlases for infant brains are highly desired yet still lacking for accurate mapping of early dynamic brain development. To bridge this significant gap, leveraging our infant-dedicated computational pipeline for cortical surface-based analysis and the unique longitudinal infant MRI dataset acquired in our research center, in this paper, we construct the first spatiotemporal (4D) high-definition cortical surface atlases for the dynamic developing infant cortical structures at seven time points, including 1, 3, 6, 9, 12, 18, and 24 months of age, based on 202 serial MRI scans from 35 healthy infants. For this purpose, we develop a novel method to ensure the longitudinal consistency and unbiasedness to any specific subject and age in our 4D infant cortical surface atlases. Specifically, we first compute the within-subject mean cortical folding by unbiased groupwise registration of longitudinal cortical surfaces of each infant. Then we establish longitudinally-consistent and unbiased inter-subject cortical correspondences by groupwise registration of the geometric features of within-subject mean cortical folding across all infants. Our 4D surface atlases capture both longitudinally-consistent dynamic mean shape changes and the individual variability of cortical folding during early brain development. Experimental results on two independent infant MRI datasets show that using our 4D infant cortical surface atlases as templates leads to significantly improved accuracy for spatial normalization

  12. Power Extension Package (PEP) system definition extension, orbital service module systems analysis study. Volume 11: PEP, cost, schedules, and work breakdown structure dictionary

    Science.gov (United States)

    1979-01-01

    Cost scheduling and funding data are presented for the reference design of the power extension package. Major schedule milestones are correlated with current Spacelab flight dates. Funding distributions provide for minimum expenditure during the first year of the project.

  13. 浅析水利水电工程施工进度计划的控制%Analysis of the Control of Water Resources and Hydropower Project Construction Schedule

    Institute of Scientific and Technical Information of China (English)

    何达军

    2014-01-01

    施工进度计划控制贯穿于整个水利水电施工项目施工过程。因此,如何进行有效可行的进度计划控制就显得非常重要。本文针对水利水电工程施工进度计划的控制,对其进行了一些探讨。%The construction schedule control throughout the whole project construction process of water conservancy and hydropower construction. Therefore, how to carry out effective feasible schedule control is very important. This article bases on the control of water resources and hydropower engineering construction schedule and discusses some of them.

  14. Measuring infertility in populations: constructing a standard definition for use with demographic and reproductive health surveys.

    Science.gov (United States)

    Mascarenhas, Maya N; Cheung, Hoiwan; Mathers, Colin D; Stevens, Gretchen A

    2012-08-31

    Infertility is a significant disability, yet there are no reliable estimates of its global prevalence. Studies on infertility prevalence define the condition inconsistently, rendering the comparison of studies or quantitative summaries of the literature difficult. This study analyzed key components of infertility to develop a definition that can be consistently applied to globally available household survey data. We proposed a standard definition of infertility and used it to generate prevalence estimates using 53 Demographic and Health Surveys (DHS). The analysis was restricted to the subset of DHS that contained detailed fertility information collected through the reproductive health calendar. We performed sensitivity analyses for key components of the definition and used these to inform our recommendations for each element of the definition. Exposure type (couple status, contraceptive use, and intent), exposure time, and outcomes were key elements of the definition that we proposed. Our definition produced estimates that ranged from 0.6% to 3.4% for primary infertility and 8.7% to 32.6% for secondary infertility. Our sensitivity analyses showed that using an exposure measure of five years is less likely to misclassify fertile unions as infertile. Additionally, using a current, rather than continuous, measure of contraceptive use over five years resulted in a median relative error in secondary infertility of 20.7% (interquartile range of relative error [IQR]: 12.6%-26.9%), while not incorporating intent produced a corresponding error in secondary infertility of 58.2% (IQR: 44.3%-67.9%). In order to estimate the global burden of infertility, prevalence estimates using a consistent definition need to be generated. Our analysis provided a recommended definition that could be applied to widely available global household data. We also summarized potential biases that should be considered when making estimates of infertility prevalence using household survey data.

  15. Analysis of the Application of Schedule Management in the Management of Construction Project%进度管理在建筑工程管理中的应用分析

    Institute of Scientific and Technical Information of China (English)

    郭军

    2014-01-01

    The paper discussed the influence of schedule ma-nagement on the construction project management and related initiatives to strengthen the progress management in project management of buildings, so as to analyze the application of schedule management in management of construction project.%本文针对进度管理,对建筑工程管理的重要影响、加强建设工程管理中的进度管理相关举措展开探讨,从而分析研究进度管理在建筑工程管理中的应用。

  16. Analysis of the importance of schedule management in construction project management%进度管理在建筑工程管理中的重要性分析

    Institute of Scientific and Technical Information of China (English)

    霍德广

    2015-01-01

    对整个建筑施工过程中的进度进行一个良好的规划与管理,是保证建设各方利益实现、建筑项目按期完工的重要保障。本文通过建筑工程中施工进度控制的概述和工程进度管理在建筑工程管理中的重要性以及解决建筑工程进度管理问题的措施进行简要分析。%the progress of the whole building construction process, a good planning and management is to ensure that the construction of the interests of al parties to realize the important guarantee, construction project completed on schedule. In this paper, through the overview of construction engineering construction progress control and the importance of the construction schedule management in construction project management and the measures to solve the problem of construction project schedule management is briefly analyzed.

  17. Refinery scheduling

    Energy Technology Data Exchange (ETDEWEB)

    Magalhaes, Marcus V.; Fraga, Eder T. [PETROBRAS, Rio de Janeiro, RJ (Brazil); Shah, Nilay [Imperial College, London (United Kingdom)

    2004-07-01

    This work addresses the refinery scheduling problem using mathematical programming techniques. The solution adopted was to decompose the entire refinery model into a crude oil scheduling and a product scheduling problem. The envelope for the crude oil scheduling problem is composed of a terminal, a pipeline and the crude area of a refinery, including the crude distillation units. The solution method adopted includes a decomposition technique based on the topology of the system. The envelope for the product scheduling comprises all tanks, process units and products found in a refinery. Once crude scheduling decisions are Also available the product scheduling is solved using a rolling horizon algorithm. All models were tested with real data from PETROBRAS' REFAP refinery, located in Canoas, Southern Brazil. (author)

  18. Construction Operations Building Information Exchange (COBIE): Requirements Definition and Pilot Implementation Standard

    Science.gov (United States)

    2007-06-01

    the Business Process Modeling Notation ( BPMN ) [Object Modeling Group 2006], was used to capture the steps relevant to COBIE. Information ex- ERDC...Construction Research Workshop, Stanford, California. Object Modeling Group. 2006. Business Process Modeling Notation ( BPMN ) Specification. Final

  19. Location-based Scheduling

    DEFF Research Database (Denmark)

    Andersson, Niclas; Christensen, Knud

    The coordination of activities and resources in order to establish an effective production flow is central to the management of construction projects. The traditional technique for coordination of activities and resources in construction projects is the CPM-scheduling, which has been the predomin......The coordination of activities and resources in order to establish an effective production flow is central to the management of construction projects. The traditional technique for coordination of activities and resources in construction projects is the CPM-scheduling, which has been...... the predominant scheduling method since it was introduced in the late 1950s. Over the years, CPM has proven to be a very powerful technique for planning, scheduling and controlling projects, which among other things is indicated by the development of a large number of CPM-based software applications available...... on the market. However, CPM is primarily an activity based method that takes the activity as the unit of focus and there is criticism raised, specifically in the case of construction projects, on the method for deficient management of construction work and continuous flow of resources. To seek solutions...

  20. Teacher Autonomy in the United States: Establishing a Standard Definition, Validation of a Nationally Representative Construct and an Investigation of Policy Affected Teacher Groups

    Science.gov (United States)

    Gwaltney, Kevin Dale

    2012-01-01

    This effort: 1) establishes an autonomy definition uniquely tailored for teaching, 2) validates a nationally generalizable teacher autonomy construct, 3) demonstrates that the model describes and explains the autonomy levels of particular teacher groups, and 4) verifies the construct can represent teacher autonomy in other empirical models. The…

  1. Teacher Autonomy in the United States: Establishing a Standard Definition, Validation of a Nationally Representative Construct and an Investigation of Policy Affected Teacher Groups

    Science.gov (United States)

    Gwaltney, Kevin Dale

    2012-01-01

    This effort: 1) establishes an autonomy definition uniquely tailored for teaching, 2) validates a nationally generalizable teacher autonomy construct, 3) demonstrates that the model describes and explains the autonomy levels of particular teacher groups, and 4) verifies the construct can represent teacher autonomy in other empirical models. The…

  2. Research of Engineering Construction Schedule Optimization Based on Multi-objective Genetic Algorithm%基于多目标遗传算法的工程施工进度计划优化研究

    Institute of Scientific and Technical Information of China (English)

    李竞克; 侯琳

    2014-01-01

    In order to optimize the construction schedule, make a more scientific schedule plan and apply multi-objective genetic algorithm into construction schedule planning process. Firstly, We elaborate on the multi-objective optimization mathematical model and multi-objective genetic algorithm. Then, establish multi- objective engineering construction progress from the following three aspects: the minimum cost, the shortest duration and the best quality. Finally, using the simulation to test the performance that multi-objective genetic algorithm in construction schedule plan. The experiments pshows that we can well solve the construction schedule objective function optimal solutions through this method, apart from this, it can offers a variety of optimization scheme, which has a high research value.%为使工程施工进度实现最优化,使进度计划方案更为科学合理,可以在施工计划制定的过程中融入多目标遗传算法。首先对多目标优化和多目标遗传算法数学模型进行了详细阐述,接着从最小费用、最短工期和最佳质量三个方面建立多目标工程施工进度目标函数,最后采用实例仿真,验证多目标遗传算法在施工进度计划制定的性能。实验证明,采用该方法能较好地求解施工进度目标函数最优解,而且能提供多种优化方案,具有较高的研究价值。

  3. 施工项目质量进度安全管理措施研究%Study on Quality,Schedule and Safety Management Measures of Construction Projects

    Institute of Scientific and Technical Information of China (English)

    曹志刚; 刘江伟; 姜晴

    2012-01-01

      Ensuring the safe quality,smooth forwarding schedule and safety construction of construction projects,pursuing maximum profit are management purposes of construction enterprises.According to the actual situation of the construction site and combining the characteristics of construction projects,studying on the quality,schedule and safety management measures and application of construction projects,in order to as far as possible prevent principles are regarded main; engineering quality,schedule and safety controlling be changed from after checked to before and during construction controlling,projects quality checking was changed to work quality,schedule,and semi finished products directly checked; requiring as far as possible shorten work a period under the premise of the assurance quality and safety,cost controlling at lowest.%  保证项目施工质量、施工进度、施工安全和利润最大化是施工企业的管理目的。根据施工现场实际情况并结合施工项目特点,对施工项目质量、进度、安全管理措施及其应用进行了研究,尽量做到以预防为主,把工程质量、进度、安全控制从事后检查转向事前控制、事中控制,从对工程质量的检查转向对工作质量的检查,对工序质量的检查,对中间产品的质量检查;要求在保证质量和安全的前提下,尽量缩短工期,进而将成本控制在最低。

  4. Distributed scheduling

    OpenAIRE

    Toptal, Ayşegül

    1999-01-01

    Ankara : Department of Industrial Engineering and the Institute of Engineering and Science of Bilkent Univ., 1999. Thesis (Master's) -- Bilkent University, 1999. Includes bibliographical references. Distributed Scheduling (DS) is a new paradigm that enables the local decisionmakers make their own schedules by considering local objectives and constraints within the boundaries and the overall objective of the whole system. Local schedules from different parts of the system are...

  5. Systems Analysis, Scenario Construction and Consequence Analysis Definition for SITE-94

    Energy Technology Data Exchange (ETDEWEB)

    Chapman, N.A.; Robinson, P. [Intera Information Technologies Ltd (United Kingdom); Andersson, Johan; Wingefors, S. [Swedish Nuclear Power Inspectorate, Stockholm (Sweden); Skagius, K.; Wiborgh, M. [Kemakta Konsult AB, Stockholm (Sweden); Wene, C.O. [Chalmers Inst. of Technology, Goeteborg (Sweden)

    1995-06-01

    SITE-94 is a performance assessment of a hypothetical repository at a real site. The main objective of the project is to determine how site specific data should be assimilated into the performance assessment process and to evaluate how uncertainties inherent in site characterization will influence performance assessment results. This report uses scenario definition work as a vehicle to introduce the systems approach to performance assessment which has been developed and tested in SITE-94 and which constitutes one of the main advances made during the project. The results of the application of the methodology are presented separately, in the SITE-94 Summary Report. 40 refs, 21 figs, 12 tabs.

  6. Study on schedule control and management of construction project underthe information technology%信息科技下建筑工程项目进度控制管理研究

    Institute of Scientific and Technical Information of China (English)

    陈恩善

    2016-01-01

    Construction project schedule control is an important work of construction project management. However,there are many factors impacted the project schedule,so the construction project schedule management and control is very important.This paper takes the construction project of Z College as an example,the problems are analyzed in the construction progress.The corresponding control measures are put forward.%建筑工程项目进度控制是建筑工程项目管理的重要工作.但是由于影响工程项目进度的因素较多,因此对于建筑工程项目的进度管理与控制是非常关键的.本文以Z学院实验楼建设工程项目为例,对其建设进度中出现的问题展开研究,提出了相应的进度控制措施.

  7. Project management with dynamic scheduling baseline scheduling, risk analysis and project control

    CERN Document Server

    Vanhoucke, Mario

    2013-01-01

    The topic of this book is known as dynamic scheduling, and is used to refer to three dimensions of project management and scheduling: the construction of a baseline schedule and the analysis of a project schedule's risk as preparation of the project control phase during project progress. This dynamic scheduling point of view implicitly assumes that the usability of a project's baseline schedule is rather limited and only acts as a point of reference in the project life cycle.

  8. Scheduling Supercomputers.

    Science.gov (United States)

    1983-02-01

    no task is scheduled with overlap. Let numpi be the total number of preemptions and idle slots of size at most to that are introduced. We see that if...no usable block remains on Qm-*, then numpi < m-k. Otherwise, numpi ! m-k-1. If j>n when this procedure terminates, then all tasks have been scheduled

  9. What is and what is not positive body image? Conceptual foundations and construct definition.

    Science.gov (United States)

    Tylka, Tracy L; Wood-Barcalow, Nichole L

    2015-06-01

    A decade ago, research on positive body image as a unique construct was relatively nonexistent, and now this area is flourishing. How and why did positive body image scholarship emerge? What is known about this contemporary construct? This article situates and contextualizes positive body image within Cash's scholarship, eating disorder prevention efforts, feminist influences, strength-based disciplines within psychology, and Buddhism. Extracting insights from quantitative and qualitative research, this article demonstrates that positive body image is (a) distinct from negative body image; (b) multifaceted (including body appreciation, body acceptance/love, conceptualizing beauty broadly, adaptive investment in appearance, inner positivity, interpreting information in a body-protective manner); (c) holistic; (d) stable and malleable; (e) protective; (f) linked to self-perceived body acceptance by others; and (g) shaped by social identities. Complementing what positive body image is, this article further details what positive body image is not to provide a more nuanced understanding of this construct. Copyright © 2015 Elsevier Ltd. All rights reserved.

  10. Process and building information modelling in the construction industry by using information delivery manuals and model view definitions

    DEFF Research Database (Denmark)

    Karlshøj, Jan

    2012-01-01

    The construction industry is gradually increasing its use of structured information and building information modelling.To date, the industry has suffered from the disadvantages of a project-based organizational structure and ad hoc solutions. Furthermore, it is not used to formalizing the flow...... of information and specifying exactly which objects and properties are needed for each process and which information is produced by the processes. The present study is based on reviewing the existing methodology of Information Delivery Manuals (IDM) from Buildingsmart, which also is also an ISO standard 29481...... Part 1; and the Model View Definition (MVD) methodology developed by Buildingsmart and BLIS. The research also includes a review of concrete IDM development projects that have been developed over the last five years. Although the study has identified interest in the IDM methodology in a number...

  11. Personnel Scheduling in Laboratories

    NARCIS (Netherlands)

    Franses, Philip; Post, Gerhard; Burke, Edmund; De Causmaecker, Patrick

    2003-01-01

    We describe an assignment problem particular to the personnel scheduling of organisations such as laboratories. Here we have to assign tasks to employees. We focus on the situation where this assignment problem reduces to constructing maximal matchings in a set of interrelated bipartite graphs. We d

  12. Research on the Construction Project Cost and Schedule Control from the Perspective of BIM Model%BIM模型视角下建设项目成本与进度控制研究

    Institute of Scientific and Technical Information of China (English)

    李静; 杜润泽

    2016-01-01

    Schedule and cost control is important in all stages of the construction project. Building information modeling (BIM) provides a comparatively complete solution for effective project cost and schedule control, and can realize the seamless integration of project participants. Through construction simulation, this article uses comprehensive progress rate curve for schedule control, and uses the method of earned value to evaluate the various cost parameters of the project, in order to realize schedule and cost control. Empirical research of the schedule and cost control of a project is carried out using BIM to implement the visualization simulation of the project schedule and cost control.%施工建设项目各个阶段都要关注进度与成本控制。建筑信息模型BIM为有效项目成本与进度控制提供了较为完备的解决方案,实现了项目参与各方的无缝集成。本文通过对项目施工模拟实现,利用综合进展率曲线进行进展控制,利用挣得值法对项目各个成本参数进行评估,以此来实现以进度与成本控制。以利用BIM对某项目进度成本控制进行实证研究,实现项目进度的可视化模拟与成本控制。

  13. Rate-optimal scheduling of recursive DSP algorithms based on the scheduling-range chart

    NARCIS (Netherlands)

    Heemstra de Groot, Sonia M.; Herrmann, Otto E.

    1990-01-01

    A method for rate-optimal scheduling of recursive DSP algorithms is presented. The approach is based on the determination of the scheduling window of each operation and the construction of a scheduling-range chart. The information in the chart is used during scheduling to optimize some quality crite

  14. PROBLEM OF THE DEFINITION THE «RELIABILITY» TERM. METHODOLOGY OF CONSTRUCTION AND STUDY THE RELIABILITY OF FREIGHT CARS

    Directory of Open Access Journals (Sweden)

    S. V. Myamlin

    2015-09-01

    Full Text Available Purpose. Scientific paper is aimed at disclosing the existing problem of the «reliability» definition and provides a reasoned definition of the term. The study assumes the development of a complex that includes the methodology and appropriate terminology that will be true. Methodology. Currently there is reliability theory in the special case of the probabilistic and statistical theory, which is used to determine or predict the occurrence of object failures. Within the existing theories the term «reliability» is formulated, the parameters related to it are described. Findings. On the basis of the conducted analysis of the research within the existing theory of reliability and personal considerations of the authors, they formulated a definition of the term «reliability». The methodology and study of the object reliability on the example of a freight car was proposed. Originality. The authors proposed a new definition of the «reliability» term. Namely: reliability is an assessment of the ability of an object to maintain the original property within the established limits and temporary space, in the conditions of storage and transportation, as well as to perform the required functions in predetermined modes of operation with maintenance and repair facility. The reliability parameters include: reliability, durability, maintainability and safety that characterize the object. Also a methodology for developing and study the reliability of a freight car was developed, which comprises: 1 design, technological and operational reliability; 2 scientific experiment, including the modeling of the freight car in different conditions and operating modes; 3 the reliability theory is presented as combined or modified, covering the mathematical and physical foundations; 4 Bayesian statistics that describe the different states of a freight car with a breakdown of its basic components and with the appropriate probability for each component to describe the

  15. Probabilistic Anonymity and Admissible Schedulers

    CERN Document Server

    Garcia, Flavio D; Sokolova, Ana

    2007-01-01

    When studying safety properties of (formal) protocol models, it is customary to view the scheduler as an adversary: an entity trying to falsify the safety property. We show that in the context of security protocols, and in particular of anonymizing protocols, this gives the adversary too much power; for instance, the contents of encrypted messages and internal computations by the parties should be considered invisible to the adversary. We restrict the class of schedulers to a class of admissible schedulers which better model adversarial behaviour. These admissible schedulers base their decision solely on the past behaviour of the system that is visible to the adversary. Using this, we propose a definition of anonymity: for all admissible schedulers the identity of the users and the observations of the adversary are independent stochastic variables. We also develop a proof technique for typical cases that can be used to proof anonymity: a system is anonymous if it is possible to `exchange' the behaviour of two...

  16. Effects of focus and definiteness on children's word order: evidence from German five-year-olds' reproductions of double object constructions.

    Science.gov (United States)

    Höhle, Barbara; Hörnig, Robin; Weskott, Thomas; Knauf, Selene; Krüger, Agnes

    2014-07-01

    Two experiments tested how faithfully German children aged 4 ;5 to 5 ;6 reproduce ditransitive sentences that are unmarked or marked with respect to word order and focus (Exp1) or definiteness (Exp2). Adopting an optimality theory (OT) approach, it is assumed that in the German adult grammar word order is ranked lower than focus and definiteness. Faithfulness of children's reproductions decreased as markedness of inputs increased; unmarked structures were reproduced most faithfully and unfaithful outputs had most often an unmarked form. Consistent with the OT proposal, children were more tolerant against inputs marked for word order than for focus; in conflict with the proposal, children were less tolerant against inputs marked for word order than for definiteness. Our results suggest that the linearization of objects in German double object constructions is affected by focus and definiteness, but that prosodic principles may have an impact on the position of a focused constituent.

  17. 人力成本的合理调度与建筑工程进度的关系建模%Modeling of the Relation between Rational Human Cost Scheduling and Construction Project′s Progress

    Institute of Scientific and Technical Information of China (English)

    庞海枫

    2015-01-01

    Adopting MLR(Multiple Linear Regression) mathematical model, the traditional model of the relation between construction enterprise's human cost scheduling and construction project progress proved to be complex in construction enterprise's human cost's feature fusion and also has low benefit prediction accuracy. Based on rough set and fuzzy assign⁃ment algorithm, the article puts forward a relation model between construction enterprise's human cost scheduling and construction project progress, it analyzes the parameter model which affecting the dispatching of the construction labor cost, establishes labor scheduling and dimission risk dispatching system, by analysis it gets that there is a linear relation⁃ship between labor dispatching and the related influence factors, and then realizes the risk probability assessment and the retrieval and matching of database information, then establishes a scheduling set for the fuzzy assignment of human cost scheduling, obtains the coupling property mathematical model related to the human cost scheduling information of con⁃struction enterprise, eventually accomplishes the establishment and improvement of the relation model based on rough set and fuzzy assignment algorithm. Simulation experiments show that this model can reasonably schedule construction enter⁃prise's human cost, thus having higher labor cost management efficiency, at the same time, it can improve the economic growth index while reducing the management cost of the enterprises, therefore has good application value.%传统的建筑施工企业人力调度与工程进度关系模型采用多元线性回归数学模型,对建筑施工企业人力成本的特征融合和效益预测精度不高。本文提出一种基于模糊指派和粗糙集算法的人力成本调度与建筑工程进度关系模型,分析了影响建筑施工人力成本调度的参数模型,建立人力成本调度和离职风险调度系统,分析人力成本调度与相关影

  18. Construction

    Science.gov (United States)

    2002-01-01

    Harbor Deepening Project, Jacksonville, FL Palm Valley Bridge Project, Jacksonville, FL Rotary Club of San Juan, San Juan, PR Tren Urbano Subway...David. What is nanotechnology? What are its implications for construction?, Foresight/CRISP Workshop on Nanotechnology, Royal Society of Arts

  19. 2007 Wholesale Power Rate Schedules : 2007 General Rate Schedule Provisions.

    Energy Technology Data Exchange (ETDEWEB)

    United States. Bonneville Power Administration.

    2006-11-01

    This schedule is available for the contract purchase of Firm Power to be used within the Pacific Northwest (PNW). Priority Firm (PF) Power may be purchased by public bodies, cooperatives, and Federal agencies for resale to ultimate consumers, for direct consumption, and for Construction, Test and Start-Up, and Station Service. Rates in this schedule are in effect beginning October 1, 2006, and apply to purchases under requirements Firm Power sales contracts for a three-year period. The Slice Product is only available for public bodies and cooperatives who have signed Slice contracts for the FY 2002-2011 period. Utilities participating in the Residential Exchange Program (REP) under Section 5(c) of the Northwest Power Act may purchase Priority Firm Power pursuant to the Residential Exchange Program. Rates under contracts that contain charges that escalate based on BPA's Priority Firm Power rates shall be based on the three-year rates listed in this rate schedule in addition to applicable transmission charges. This rate schedule supersedes the PF-02 rate schedule, which went into effect October 1, 2001. Sales under the PF-07 rate schedule are subject to BPA's 2007 General Rate Schedule Provisions (2007 GRSPs). Products available under this rate schedule are defined in the 2007 GRSPs. For sales under this rate schedule, bills shall be rendered and payments due pursuant to BPA's 2007 GRSPs and billing process.

  20. HOW GOOD IS A DENSE SHOP SCHEDULE?

    Institute of Scientific and Technical Information of China (English)

    陈礴; 俞文(鱼此)

    2001-01-01

    In this paper, we study a class of simple and easy-to-construct shop schedules, known as dense schedules. We present tight bounds on the maximum deviation in makespan of dense flow-shop and job-shop schedules from their optimal ones. For dense open-shop schedules, we do the same for the special case of four machines and thus add a stronger supporting case for proving a standing conjecture.

  1. Constraint-based scheduling applying constraint programming to scheduling problems

    CERN Document Server

    Baptiste, Philippe; Nuijten, Wim

    2001-01-01

    Constraint Programming is a problem-solving paradigm that establishes a clear distinction between two pivotal aspects of a problem: (1) a precise definition of the constraints that define the problem to be solved and (2) the algorithms and heuristics enabling the selection of decisions to solve the problem. It is because of these capabilities that Constraint Programming is increasingly being employed as a problem-solving tool to solve scheduling problems. Hence the development of Constraint-Based Scheduling as a field of study. The aim of this book is to provide an overview of the most widely used Constraint-Based Scheduling techniques. Following the principles of Constraint Programming, the book consists of three distinct parts: The first chapter introduces the basic principles of Constraint Programming and provides a model of the constraints that are the most often encountered in scheduling problems. Chapters 2, 3, 4, and 5 are focused on the propagation of resource constraints, which usually are responsibl...

  2. A Hybrid Genetic Algorithm for the Job Shop Scheduling Problem

    OpenAIRE

    Gonçalves, José Fernando; Mendes, J. J. M.; Resende, Maurício G. C.

    2005-01-01

    This paper presents a hybrid genetic algorithm for the Job Shop Scheduling problem. The chromosome representation of the problem is based on random keys. The schedules are constructed using a priority rule in which the priorities are defined by the genetic algorithm. Schedules are constructed using a procedure that generates parameterized active schedules. After a schedule is obtained a local search heuristic is applied to improve the solution. The approach is tested on a set o...

  3. Usability Constructs

    DEFF Research Database (Denmark)

    Hertzum, Morten; Clemmesen, Torkil; Hornbæk, Kasper Anders Søren

    2007-01-01

    Whereas research on usability predominantly employs universal definitions of the aspects that comprise usability, people experience their use of information systems through personal constructs. Based on 48 repertory-grid interviews, this study investigates how such personal constructs are affecte...

  4. Scheduling commercial advertisements for television

    OpenAIRE

    Garcia-Villoria, Alberto; Salhi, Said

    2014-01-01

    The problem of scheduling the commercial advertisements in the television industry is investigated. Each advertiser client demands that the multiple airings of the same brand advertisement should be as spaced as possible over a given time period. Moreover, audience rating requests have to be taken into account in the scheduling. This is the first time this hard decision problem is dealt with in the literature. We design two mixed integer linear programming (MILP) models. Two constructive heur...

  5. PRACTICAL IMPLICATIONS OF LOCATION-BASED SCHEDULING

    DEFF Research Database (Denmark)

    Andersson, Niclas; Christensen, Knud

    2007-01-01

    The traditional method for planning, scheduling and controlling activities and resources in construction projects is the CPM-scheduling, which has been the predominant scheduling method since its introduction in the late 1950s. Over the years, CPM has proven to be a very powerful technique...... for planning, scheduling and controlling projects. However, criticism has been raised on the CPM method, specifically in the case of construction projects, for deficient management of construction work and discontinuous flow of resources. Alternative scheduling techniques, often called repetitive or linear...... that will be used in this study. LBS is a scheduling method that rests upon the theories of line-of-balance and which uses the graphic representation of a flowline chart. As such, LBS is adapted for planning and management of workflows and, thus, may provide a solution to the identified shortcomings of CPM. Even...

  6. User interface issues in supporting human-computer integrated scheduling

    Science.gov (United States)

    Cooper, Lynne P.; Biefeld, Eric W.

    1991-09-01

    The topics are presented in view graph form and include the following: characteristics of Operations Mission Planner (OMP) schedule domain; OMP architecture; definition of a schedule; user interface dimensions; functional distribution; types of users; interpreting user interaction; dynamic overlays; reactive scheduling; and transitioning the interface.

  7. 铁路建设项目环保投资界定%Definition of Environmental Protection Investment in Railway Construction Projects

    Institute of Scientific and Technical Information of China (English)

    韩瑜; 韩鹏

    2016-01-01

    以铁路建设项目环保投资为研究对象,主要针对如何界定铁路建设项目环保投资展开研究。在系统梳理环保投资国内外相关文献的基础上,结合我国铁路行业特点,对铁路建设环保投资进行定义。同时,总结了目前我国铁路建设项目环保投资的统计现状,结合铁路建设环保投资的定义,建立了铁路建设项目环保投资的界定原则,初步设计了铁路建设项目环保投资统计表,并提出相关建议。%Taking environmental protection investment in railway construction projects as the object of study , the paper focuses on how to define environmental protection investment in railway construction projects .Based on the systematic analysis of documents related to environmental protection investment at home and abroad , combined with the features of railway industry in China , this paper defines the environmental protection investment in railway construction projects .In addition, this paper summarizes the current status of environmental protection investment in railway construction projects in China .Combined with the definition of environmental protection investment in railway construction , this paper establishes the definition principles of environmental protection investment in railway construction projects , designs the environmental protection investment statistical table , and proposes some related suggestions .

  8. Developing a Construct to Evaluate Flares in Rheumatoid Arthritis: A Conceptual Report of the OMERACT RA Flare Definition Working Group

    DEFF Research Database (Denmark)

    Alten, Rieke; Choy, Ernest H; Christensen, Robin

    2011-01-01

    Rheumatoid arthritis (RA) patients and healthcare professionals (HCP) recognize that episodic worsening disease activity, often described as a "flare," is a common feature of RA that can contribute to impaired function and disability. However, there is no standard definition to enable measurement...... of its intensity and impact. The conceptual framework of the Outcome Measures in Rheumatology Clinical Trials (OMERACT) RA Flare Definition Working Group includes an anchoring statement, developed at OMERACT 9 in 2008: "flare in RA" is defined as worsening of signs and symptoms of sufficient intensity...... is intended to enhance patient-HCP communication. This article describes the conceptual framework being used by the OMERACT RA Flare Definition Working Group in developing a standardized method for description and measurement of "flare in RA" to guide individual patient treatment....

  9. Scheduling the Secondary School.

    Science.gov (United States)

    Dempsey, Richard A.; Traverso, Henry P.

    This "how-to-do-it" manual on the intricacies of school scheduling offers both technical information and common sense advice about the process of secondary school scheduling. The first of six chapters provides an overview of scheduling; chapter 2 examines specific considerations for scheduling; chapter 3 surveys the scheduling models and their…

  10. Late language acquisition and identity construction: variation in use of the Dutch definite determiners DE and HET

    NARCIS (Netherlands)

    Cornips, L.; Hulk, A.

    2013-01-01

    Acquisition of the grammatical gender of the Dutch definite common determiner de and neuter het is a long-lasting process since monolingual children do not acquire a target grammar with respect to the use of het until the age of six. Before that age, they overuse de. Bilingual child acquirers from e

  11. Late language acquisition and identity construction: variation in use of the Dutch definite determiners DE and HET

    NARCIS (Netherlands)

    L. Cornips; A. Hulk

    2011-01-01

    Acquisition of the grammatical gender of the Dutch definite common determiner de and neuter het is a long-lasting process since monolingual children do not acquire a target grammar with respect to the use of het until the age of six. Before that age, they overuse de. Bilingual child acquirers from e

  12. Definitions of Mathematical Knowledge for Teaching: Using These Constructs in Research on Secondary and College Mathematics Teachers

    Science.gov (United States)

    Speer, Natasha M.; King, Karen D.; Howell, Heather

    2015-01-01

    The construct "mathematical knowledge for teaching" (MKT) has received considerable attention in the mathematics education community in recent years. The development and refinement of the MKT construct, including the components of common content knowledge (CCK) and specialized content knowledge (SCK), came from research into elementary…

  13. 38 CFR 39.2 - Definitions.

    Science.gov (United States)

    2010-07-01

    ... characteristics, schedule for development, and estimates of costs by phases of construction. (f) Project means an... selection, land acquisition, design and planning, earthmoving, landscaping, construction and provision...

  14. Future aircraft networks and schedules

    Science.gov (United States)

    Shu, Yan

    2011-07-01

    Because of the importance of air transportation scheduling, the emergence of small aircraft and the vision of future fuel-efficient aircraft, this thesis has focused on the study of aircraft scheduling and network design involving multiple types of aircraft and flight services. It develops models and solution algorithms for the schedule design problem and analyzes the computational results. First, based on the current development of small aircraft and on-demand flight services, this thesis expands a business model for integrating on-demand flight services with the traditional scheduled flight services. This thesis proposes a three-step approach to the design of aircraft schedules and networks from scratch under the model. In the first step, both a frequency assignment model for scheduled flights that incorporates a passenger path choice model and a frequency assignment model for on-demand flights that incorporates a passenger mode choice model are created. In the second step, a rough fleet assignment model that determines a set of flight legs, each of which is assigned an aircraft type and a rough departure time is constructed. In the third step, a timetable model that determines an exact departure time for each flight leg is developed. Based on the models proposed in the three steps, this thesis creates schedule design instances that involve almost all the major airports and markets in the United States. The instances of the frequency assignment model created in this thesis are large-scale non-convex mixed-integer programming problems, and this dissertation develops an overall network structure and proposes iterative algorithms for solving these instances. The instances of both the rough fleet assignment model and the timetable model created in this thesis are large-scale mixed-integer programming problems, and this dissertation develops subproblem schemes for solving these instances. Based on these solution algorithms, this dissertation also presents

  15. List scheduling revisited

    NARCIS (Netherlands)

    Schutten, Johannes M.J.

    1996-01-01

    We consider the problem of scheduling n jobs on m identical parallel machines to minimize a regular cost function. The standard list scheduling algorithm converts a list into a feasible schedule by focusing on the job start times. We prove that list schedules are dominant for this type of problem.

  16. A Disk Scheduling Algorithm: SPFF

    Institute of Scientific and Technical Information of China (English)

    HU Ming

    2005-01-01

    We put forward an optimal disk schedule with n disk requests and prove its optimality mathematically. Generalizing the idea of an optimal disk schedule, we remove the limit of n requests and, at the same time, consider the dynamically arrival model of disk requests to obtain an algorithm, shortest path first-fit first (SPFF). This algorithm is based on the shortest path of disk head motion constructed by all the pendent requests. From view of the head-moving distance, it has the stronger globality than SSTF. From view of the head-moving direction, it has the better flexibility than SCAN. Therefore, SPFF keeps the advantage of SCAN and, at the same time, absorbs the strength of SSTF. The algorithm SPFF not only shows the more superiority than other scheduling polices, but also have higher adjustability to meet the computer system's different demands.

  17. Dynamic Fractional Resource Scheduling vs. Batch Scheduling

    CERN Document Server

    Casanova, Henri; Vivien, Frédéric

    2011-01-01

    We propose a novel job scheduling approach for homogeneous cluster computing platforms. Its key feature is the use of virtual machine technology to share fractional node resources in a precise and controlled manner. Other VM-based scheduling approaches have focused primarily on technical issues or on extensions to existing batch scheduling systems, while we take a more aggressive approach and seek to find heuristics that maximize an objective metric correlated with job performance. We derive absolute performance bounds and develop algorithms for the online, non-clairvoyant version of our scheduling problem. We further evaluate these algorithms in simulation against both synthetic and real-world HPC workloads and compare our algorithms to standard batch scheduling approaches. We find that our approach improves over batch scheduling by orders of magnitude in terms of job stretch, while leading to comparable or better resource utilization. Our results demonstrate that virtualization technology coupled with light...

  18. Construction of quality-assured infant feeding process of care data repositories: definition and design (Part 1).

    Science.gov (United States)

    Garcí A-de-León-Chocano, Ricardo; Sáez, Carlos; Muñoz-Soler, Verónica; Garcí A-de-León-González, Ricardo; García-Gómez, Juan M

    2015-12-01

    This is the first paper of a series of two regarding the construction of data quality (DQ) assured repositories for the reuse of information on infant feeding from birth until two years old. This first paper justifies the need for such repositories and describes the design of a process to construct them from Electronic Health Records (EHR). As a result, Part 1 proposes a computational process to obtain quality-assured datasets represented by a canonical structure extracted from raw data from multiple EHR. For this, 13 steps were defined to ensure the harmonization, standardization, completion, de-duplication, and consistency of the dataset content. Moreover, the quality of the input and output data for each of these steps is controlled according to eight DQ dimensions: predictive value, correctness, duplication, consistency, completeness, contextualization, temporal-stability and spatial-stability. The second paper of the series will describe the application of this computational process to construct the first quality-assured repository for the reuse of information on infant feeding in the perinatal period aimed at the monitoring of clinical activities and research.

  19. Managerial implications and suitability of a master surgical scheduling approach

    NARCIS (Netherlands)

    J.M. van Oostrum (Jeroen); E. Bredenhoff (Eelco); E.W. Hans (Erwin)

    2008-01-01

    textabstractMaster surgical scheduling can improve manageability and efficiency of operating room departments. This approach cyclically executes a master surgical schedule of surgery types. These surgery types need to be constructed with low variability to be efficient. Each surgery type is schedule

  20. 41 CFR 101-5.104-4 - Scheduling feasibility studies.

    Science.gov (United States)

    2010-07-01

    ... FEDERAL BUILDINGS AND COMPLEXES 5.1-General § 101-5.104-4 Scheduling feasibility studies. The schedule of feasibility studies will be coordinated by GSA with its construction, space management, and buildings... 41 Public Contracts and Property Management 2 2010-07-01 2010-07-01 true Scheduling...

  1. Optimizing Flight Schedules by an Automated Decision Support System

    Science.gov (United States)

    2014-03-01

    As a result of this, constructing the solution model in a language which is easy to enhance is critical. VBA is a powerful language for easy and quick...Flight Schedule Model ...............................................................................................45 Manual Assignments by...Scheduling Model .............................................................................62 Contribution of scheduling model to air force(s

  2. A model for generating master surgical schedules to allow cyclic scheduling in operating room departments

    NARCIS (Netherlands)

    Oostrum, van J.M.; Houdenhoven, van M.; Hurink, J.L.; Hans, E.W.; Wullink, G.; Kazemier, G.

    2005-01-01

    This paper addresses the problem of operating room scheduling at the tactical level of hospital planning and control. Hospitals repetitively construct operating room schedules, which is a time consuming tedious and complex task. The stochasticity of the durations of surgical procedures complicates t

  3. NEW NONSTANDARD JOB SHOP SCHEDULING ALGORITHM

    Institute of Scientific and Technical Information of China (English)

    XIE Zhiqiang; YE Guangjie; ZHANG Dali; TAN Guangyu

    2008-01-01

    Considering the complex constraint between operations in nonstandard job shop scheduling problem (NJSSP), critical path of job manufacturing tree is determined according to priority scheduling function constructed. Operations are divided into dependent operations and independent operations with the idea of subsection, and corresponding scheduling strategy is put forward according to operation characteristic in the segment and the complementarities of identical function machines. Forward greedy rule is adopted mainly for dependent operations to make operations arranged in the right position of machine selected, then each operation can be processed as early as possible, and the total processing time of job can be shortened as much as possible. For independent operations optimum scheduling rule is adopted mainly, the inserting position of operations will be determined according to the gap that the processing time of operations is subtracted from idle time of machine, and the operation will be inserted in the position with minimal gap. Experiments show, under the same conditions, the result that operations are scheduled according to the object function constructed, and the scheduling strategy adopted is better than the result that operations are scheduled according to efficiency scheduling algorithm.

  4. 基于模糊进化算法的建筑工程进度优化研究%Study on the construction schedule optimization based on fuzzy-evolutionary algorithm

    Institute of Scientific and Technical Information of China (English)

    刘泽; 赵胜利; 王晓燕

    2012-01-01

    In view of the uncertainty of building construction, fuzzy due date is denoted by six-point fuzzy numbers through the introduction of fuzzy mathematics. Based on the objective to maximize the clients' satisfaction degree and the reliability of the optimization result, the mathematical model for fuzzy resource-constrained project scheduling is established. By use of the evolutionary algorithm, the optimization of project progress under the limited resource is studied. The result of the computational experiment shows the algorithm is effective and feasible.%针对建筑工程施工工期的不确定性,引入模糊数学理论,采用6点模糊数表示工期.以建设单位对优化工期的满意度和可靠性作为优化目标,建立资源受限条件下施工进度数学优化模型,利用进化算法对施工进度进行优化.通过建筑工程实例,证明了本研究设计的算法的有效性和可行性.

  5. Immunization Schedules for Adults

    Science.gov (United States)

    ... Everyone: Easy-to-read Schedules Infants and Children Preteens and Teens Adults Display Immunization Schedules and Quiz ... file Microsoft Word file Microsoft Excel file Audio/Video file Apple Quicktime file RealPlayer file Text file ...

  6. Instant Childhood Immunization Schedule

    Science.gov (United States)

    ... Everyone: Easy-to-read Schedules Infants and Children Preteens and Teens Adults Display Immunization Schedules and Quiz ... file Microsoft Word file Microsoft Excel file Audio/Video file Apple Quicktime file RealPlayer file Text file ...

  7. Reinforcement learning in scheduling

    Science.gov (United States)

    Dietterich, Tom G.; Ok, Dokyeong; Zhang, Wei; Tadepalli, Prasad

    1994-01-01

    The goal of this research is to apply reinforcement learning methods to real-world problems like scheduling. In this preliminary paper, we show that learning to solve scheduling problems such as the Space Shuttle Payload Processing and the Automatic Guided Vehicle (AGV) scheduling can be usefully studied in the reinforcement learning framework. We discuss some of the special challenges posed by the scheduling domain to these methods and propose some possible solutions we plan to implement.

  8. Scheduling with Time Lags

    NARCIS (Netherlands)

    X. Zhang (Xiandong)

    2010-01-01

    textabstractScheduling is essential when activities need to be allocated to scarce resources over time. Motivated by the problem of scheduling barges along container terminals in the Port of Rotterdam, this thesis designs and analyzes algorithms for various on-line and off-line scheduling problems

  9. Parallel scheduling algorithms

    Energy Technology Data Exchange (ETDEWEB)

    Dekel, E.; Sahni, S.

    1983-01-01

    Parallel algorithms are given for scheduling problems such as scheduling to minimize the number of tardy jobs, job sequencing with deadlines, scheduling to minimize earliness and tardiness penalties, channel assignment, and minimizing the mean finish time. The shared memory model of parallel computers is used to obtain fast algorithms. 26 references.

  10. Approximation algorithm for multiprocessor parallel job scheduling

    Institute of Scientific and Technical Information of China (English)

    陈松乔; 黄金贵; 陈建二

    2002-01-01

    Pk|fix|Cmax problem is a new scheduling problem based on the multiprocessor parallel job, and it is proved to be NP-hard problem when k≥3. This paper focuses on the case of k=3. Some new observations and new techniques for P3|fix|Cmax problem are offered. The concept of semi-normal schedulings is introduced, and a very simple linear time algorithm Semi-normal Algorithm for constructing semi-normal schedulings is developed. With the method of the classical Graham List Scheduling, a thorough analysis of the optimal scheduling on a special instance is provided, which shows that the algorithm is an approximation algorithm of ratio of 9/8 for any instance of P3|fix|Cmax problem, and improves the previous best ratio of 7/6 by M.X.Goemans.

  11. An Optimal Transportation Schedule of Mobile Equipment

    Directory of Open Access Journals (Sweden)

    S. Guillén-Burguete

    2012-10-01

    Full Text Available Motivated by a problem faced by road construction companies, we develop a new model to obtain an optimaltransportation schedule of mobile machines which have to travel to execute tasks. In this problem, each task ischaracterized by the location where it is to be executed, a work-content in terms of machine-time units, and one ormore time intervals within which it can be performed. The machines can be transported from one location to anotherat any time, thus the problem has an indefinite number of variables. However, this indefinite number of variables canbe reduced to a definite one because, as we prove, the problem has an optimal solution in which the arrivals ofmachines occur only at certain time instants. The objective is to minimize the total transportation cost such that all thetasks are executed within their time intervals. The constraints ensuring that the tasks are processed within theirprescribed time intervals are nonlinear; nevertheless, due to the sets of the possible arrival times of the machinesforming bounded convex polyhedra, our problem can be transformed into a mixed integer linear program by the samedevice used in the decomposition principle of Dantzig-Wolfe.

  12. Stable schedule matchings by a fixed point method

    CERN Document Server

    Komornik, Vilmos; Viauroux, Christelle K

    2010-01-01

    We generalize several schedule matching theorems of Baiou-Balinski (Math. Oper. Res., 27 (2002), 485) and Alkan-Gale (J. Econ. Th. 112 (2003), 289) by applying a fixed point method of Fleiner (Math. Oper. Res., 28 (2003), 103). Thanks to a more general construction of revealing choice maps we develop an algorithm to solve rather complex matching problems. The flexibility and efficiency of our approach is illustrated by various examples. We also revisit the mathematical structure of the matching theory by comparing various definitions of stable sets and various classes of choice maps. We demonstrate, by several examples, that the revealing property of the choice maps is the most suitable one to ensure the existence of stable matchings; both from the theoretical and the practical point of view.

  13. DSN Scheduling Engine

    Science.gov (United States)

    Clement, Bradley; Johnston, Mark; Wax, Allan; Chouinard, Caroline

    2008-01-01

    The DSN (Deep Space Network) Scheduling Engine targets all space missions that use DSN services. It allows clients to issue scheduling, conflict identification, conflict resolution, and status requests in XML over a Java Message Service interface. The scheduling requests may include new requirements that represent a set of tracks to be scheduled under some constraints. This program uses a heuristic local search to schedule a variety of schedule requirements, and is being infused into the Service Scheduling Assembly, a mixed-initiative scheduling application. The engine resolves conflicting schedules of resource allocation according to a range of existing and possible requirement specifications, including optional antennas; start of track and track duration ranges; periodic tracks; locks on track start, duration, and allocated antenna; MSPA (multiple spacecraft per aperture); arraying/VLBI (very long baseline interferometry)/delta DOR (differential one-way ranging); continuous tracks; segmented tracks; gap-to-track ratio; and override or block-out of requirements. The scheduling models now include conflict identification for SOA(start of activity), BOT (beginning of track), RFI (radio frequency interference), and equipment constraints. This software will search through all possible allocations while providing a best-effort solution at any time. The engine reschedules to accommodate individual emergency tracks in 0.2 second, and emergency antenna downtime in 0.2 second. The software handles doubling of one mission's track requests over one week (to 42 total) in 2.7 seconds. Further tests will be performed in the context of actual schedules.

  14. Scheduling Algorithm for Complex Product Development

    Institute of Scientific and Technical Information of China (English)

    LIUMin; ZHANGLong; WUCheng

    2004-01-01

    This paper describes the Complex product development project scheduling problem (CPDPSP) with a great number of activities, complicated resource, precedence and calendar constraints. By the conversion of precedence constraint relations, the CPDPSP is simplified. Then, according to the predictive control principle, we propose a new scheduling algorithm Based on prediction (BoP-procedure). In order to get the problem characteristics coming from resource status and precedence constraints of the scheduling problem at the scheduling time, a sub-project is constructed on the basis of a sub-AoN (Activity on node) graph of the project. Then, we use the modified GDH-procedure to solve the sub-project scheduling problem and to obtain the maximum feasible active subset for determining the activity group which satisfies resource, precedence and calendar constraints and has the highest scheduling priority at the scheduling time. Additionaily, we make a great number of numerical computations and compare the performance of BoP-procedure algorithm with those of other scheduling algorithms. Computation results show that the BoP-procedure algorithm is more suitable for the CPDPSP. At last, we discuss briefly future research work in the CPDPSP.

  15. New Proactive Time Buffer Heuristics for Robust Project Scheduling

    Science.gov (United States)

    Elshaer, Raafat; Yamamoto, Hidehiko

    Robust scheduling is aiming at constructing proactive schedules capable of dealing with multiple disruptions during project execution. Insertion a time buffer, before an activity start time, is a method to improve the robustness (stability) of a baseline schedule. In this paper, we introduce new heuristics for inserting time buffers in a given baseline schedule while the project due date is predefined and stochastic activity duration is considered. Computational results obtained from a set of benchmark projects show that the proposed heuristics capable of generating proactive schedules with acceptable quality and solution robustness.

  16. Routing and scheduling problems

    DEFF Research Database (Denmark)

    Reinhardt, Line Blander

    be that the objects routed have an availability time window and a delivery time window or that locations on the path have a service time window. When routing moving transportation objects such as vehicles and vessels schedules are made in connection with the routing. Such schedules represent the time for the presence...... to a destination on a predefined network, the routing and scheduling of vessels in a liner shipping network given a demand forecast to be covered, the routing of manpower and vehicles transporting disabled passengers in an airport and the vehicle routing with time windows where one version studied includes edge...... of a connection between two locations. This could be an urban bus schedule where busses are routed and this routing creates a bus schedule which the passengers between locations use. In this thesis various routing and scheduling problems will be presented. The topics covered will be routing from an origin...

  17. Definition of intractable epilepsy.

    Science.gov (United States)

    Sinha, Shobhit; Siddiqui, Khurram A

    2011-01-01

    Defining intractable epilepsy is essential not only to identify up to 40% of patients refractory to pharmacological management, but also to facilitate selection and comparison of such patients for research purposes. The ideal definition still eludes us. Multiple factors including number of antiepileptic drug (AED) failures, seizure frequency and duration of unresponsiveness, etiology, and epilepsy syndromes are considered in formulating the definition of pharmaco-resistant epilepsy. Most definitions used in the literature agree on the number of AED failures, which seem to be 2 or 3, however, the seizure frequency and time factor are varied. The International League Against Epilepsy proposed a definition of drug-resistant epilepsy as a failure of adequate trials of 2 tolerated and appropriately chosen and used AED schedules. This for now, could provide an operational definition for clinical and research settings. However, with emergence of new data and novel treatments the criteria for intractability may change.

  18. TANK OPERATIONS CONTRACT CONSTRUCTION MANAGEMENT METHODOLOGY UTILIZING THE AGENCY METHOD OF CONSTRUCTION MANAGEMENT

    Energy Technology Data Exchange (ETDEWEB)

    LESKO KF; BERRIOCHOA MV

    2010-02-26

    subcontracted directly by WRPS to small or disadvantaged contractors that are mentored and supported by URS personnel. Each small contractor is mentored and supported utilizing the principles of the Construction Industry Institute (CII) Partnering process. Some of the key mentoring and partnering areas that are explored in this paper are, internal and external safety professional support, subcontractor safety teams and the interface with project and site safety teams, quality assurance program support to facilitate compliance with NQA-1, construction, team roles and responsibilities, work definition for successful fixed price contracts, scheduling and interface with project schedules and cost projection/accruals. The practical application of the CII Partnering principles, with the Construction Management expertise of URS, has led to a highly successful construction model that also meets small business contracting goals.

  19. Widening the Schedulability Hierarchical Scheduling Systems

    DEFF Research Database (Denmark)

    Boudjadar, Jalil; David, Alexandre; Kim, Jin Hyun

    2014-01-01

    the supply of resources in each component. We specifically investigate two different techniques to widen the set of provably schedulable systems: 1) a new supplier model; 2) restricting the potential task offsets. We also provide a way to estimate the minimum resource supply (budget) that a component...

  20. Interval Scheduling: A Survey

    NARCIS (Netherlands)

    Kolen, A.W.J.; Lenstra, J.K.; Papadimitriou, C.H.; Spieksma, F.C.R.

    2007-01-01

    In interval scheduling, not only the processing times of the jobs but also their starting times are given. This article surveys the area of interval scheduling and presents proofs of results that have been known within the community for some time. We first review the complexity and approximability o

  1. Scheduling: Seven Period Day

    Science.gov (United States)

    Williamson, Ronald

    2010-01-01

    Driven by stable or declining financial resources many school districts are considering the costs and benefits of a seven-period day. While there is limited evidence that any particular scheduling model has a greater impact on student learning than any other, it is clear that the school schedule is a tool that can significantly impact teacher…

  2. Guidelines of Decommissioning Schedule Establishment

    Energy Technology Data Exchange (ETDEWEB)

    Oh, Jae Yong; Yun, Taesik; Kim, Younggook; Kim, Hee-Geun [KHNP CRI, Daejeon (Korea, Republic of)

    2016-10-15

    Decommissioning has recently become an issue highlighted in Korea due to the Permanent Shutdown (PS) of Kori-1 plant. Since Korea Hydro and Nuclear Power (KHNP) Company decided the PS of Kori-1 instead of further continued operation, Kori-1 will be the first decommissioning plant of the commercial reactors in Korea. Korean regulatory authority demands Initial Decommissioning Plan (IDP) for all the plants in operation and under construction. In addition, decommissioning should be considered for the completion of the life cycle of NPPs. To date, Korea has no experience regarding decommissioning of the commercial reactor and a lot of uncertainties will be expected due to its site-specific factors. However, optimized decommissioning process schedule must be indispensable in the safety and economic efficiency of the project. Differed from USA, Korea has no experience and know-hows of the operation and site management for decommissioning. Hence, in Korea, establishment of decommissioning schedule has to give more weight to safety than precedent cases. More economical and rational schedule will be composed by collecting and analyzing the experience data and site-specific data and information as the decommissioning progresses. In a long-range outlook, KHNP having capability of NPP decommissioning will try to decommissioning business in Korea and foreign countries.

  3. Scheduling for Responsive Grids

    CERN Document Server

    Germain-Renaud, C; Moscicki,JT; Texier, R

    2008-01-01

    Grids are facing the challenge of seamless integration of the Grid power into everyday use. One critical component for this integration is responsiveness, the capacity to support on-demand computing and interactivity. Grid scheduling is involved at two levels in order to provide responsiveness: the policy level and the implementation level. The main contributions of this paper are as follows. First, we present a detailed analysis of the performance of the EGEE Grid with respect to responsiveness. Second, we examine two user-level schedulers located between the general scheduling layer and the application layer. These are the DIANE (distributed analysis environment) framework, a general-purpose overlay system, and a specialized, embedded scheduler for gPTM3D, an interactive medical image analysis application. Finally, we define and demonstrate a virtualization scheme, which achieves guaranteed turnaround time, schedulability analysis, and provides the basis for differentiated services. Both methods target a br...

  4. The robust schedule - a link to improved workflow

    DEFF Research Database (Denmark)

    Lindhard, Søren Munch; Wandahl, Søren

    2012-01-01

    In today’s construction, there is a paramount focus on time, and on the scheduling and control of time. Everything is organized with respect to time. The construction project has to be completed within a fixed and often tight deadline. Otherwise a daily penalty often has to be paid. This pins down...... the contractors, and forces them to rigorously adhere to the initial schedule. If delayed the work-pace or manpower has to be increased to observe the schedule. In an attempt to improve productivity, three independent site-mangers have been interviewed about time-scheduling. Their experiences and opinions have...... been analyzed and weaknesses in existing time scheduling have been found. The findings showed a negative side effect of keeping the schedule too tight as it becomes inflexible and cannot absorb variability in production. Flexibility is necessary because of the contractors’ interacting and dependent...

  5. 俄语词汇学术语概念体系构建的意义与依据%On the Significance and Reference of the Definition Sys-tem Construction of Russian Vocabulary Technics

    Institute of Scientific and Technical Information of China (English)

    董红晶

    2015-01-01

    The research of technics theory started in 1930s. In 1960s when contemporary technics theory generally formed, technics and the definitions they express have become the object of technics research. In 1970s, technics has become an indepen-dent discipline. Experts who are engaged in individual technics research carry out analysis and research on technics of different fields, including vocabulary technics which is closely related to technics. Previous domestic researches of vocabulary technics are mostly semantic analysis and construction, instead of analysis and research from the perspective of definition system and construct-ing definition division figures, so it is necessary to analyze and research the definition system of vocabulary. This paper will e-laborate the theoretical and practical significance as well as the basis of constructing a vocabulary definition system, aiming to lay a theoretical foundation for the construction of a vocabulary defi-nition system.%术语学理论研究始于20世纪30年代。60年代,当代术语学理论基本形成后,术语和其表达的概念成为术语学的研究对象。70年代术语学成为一门独立的学科。其中从事个别术语学研究的专家学者对不同领域的术语进行分析研究,与术语学密切相关的词汇学术语自然也列在其中。此前国内对词汇学术语的研究,大多停留在语义分析和构成方面,尚未从概念体系和构建概念划分图示的角度对词汇学术语进行分析和研究,因此对词汇学概念体系进行分析研究是必要的。本文将阐述构建词汇学概念体系的理论意义、实践意义以及构建概念体系的依据,为词汇学概念体系的构建做好理论铺垫。

  6. HEALTH RIGHTS FOR ETHNICS GROUPS IN BOGOTÁ. THE DEFINITION OF THE PROBLEM AND THE CONSTRUCTION OF THE AGENDA “BOGOTÁ WHITHOUT INDIFFERENCE A SOCIAL COMMITMENT WITH THE POOR AND THE EXCLUSION” 2004-2007

    OpenAIRE

    González Acosta, Angélica; Universidad del Rosario

    2009-01-01

    Four are the steps required for the production of a public policy, according to the sequen- tial model suggested by Harold laswell (1956) and developed by Jones (1970). First of all, it is the definition of the problem and the construction of the agenda. Secondly, it is the formulation, the decision or legitimization, third the implementation, and finally, the evaluation of the public policy. An analysis in the first stage of the public policy production appears in this reflection document. T...

  7. Schedule Management of Construction Projects Based on Last Planner System%基于最后计划者系统的工程项目进度计划管理

    Institute of Scientific and Technical Information of China (English)

    金峻炎

    2013-01-01

    为了使工程项目进度计划更具有可操作性以及对进度的可控性,在编制项目进度计划过程中引入基于精益思想TFV理论的最后计划者系统。通过该系统的项目主计划、前瞻计划以及周计划的编制与实施,将进度计划的编制从传统的“推式”系统转变为“拉式”系统,可以实现项目计划的动态跟踪与管理。基于案例比较分析,证实该方法可以提高项目进度计划的有效性和可操作性。%Last planner system (LPS) is a kind of schedule management of project based TFV theory of lean thinking, which can enhance the operability and controllability of the project schedule. Based on the master schedule, look-ahead schedule and weekly work plan, LPS transfers the traditional"push"system into"pull"sys-tem for schedule management and realizes the dynamic tracking and management of the schedule. The new tech-nology can improve the effectiveness and operability by comparison between traditional method and LPS based on the case study.

  8. Schedule and status of irradiation experiments

    Energy Technology Data Exchange (ETDEWEB)

    Rowcliffe, A.F.; Grossbeck, M.L.; Robertson, J.P. [Oak Ridge National Lab., TN (United States)

    1998-03-01

    The current status of reactor irradiation experiments is presented in tables summarizing the experimental objectives, conditions, and schedule. Currently, the program has four irradiation experiments in reactor, and five experiments in the design or construction stages. Postirradiation examination and testing is in progress on ten experiments.

  9. Schedule and status of irradiation experiments

    Energy Technology Data Exchange (ETDEWEB)

    Rowcliffe, A.F.; Grossbeck, M.L.; Robertson, J.P. [Oak Ridge National Lab., TN (United States)

    1998-09-01

    The current status of reactor irradiation experiments is presented in tables summarizing the experimental objectives, conditions, and schedule. Currently, the program has one irradiation experiment in reactor and five experiments in the design or construction stages. Postirradiation examination and testing is in progress on ten experiments.

  10. Effects of Block Scheduling

    Directory of Open Access Journals (Sweden)

    William R. Veal

    1999-09-01

    Full Text Available This study examined the effects of a tri-schedule on the academic achievement of students in a high school. The tri-schedule consists of traditional, 4x4 block, and hybrid schedules running at the same time in the same high school. Effectiveness of the schedules was determined from the state mandated test of basic skills in reading, language, and mathematics. Students who were in a particular schedule their freshman year were tested at the beginning of their sophomore year. A statistical ANCOVA test was performed using the schedule types as independent variables and cognitive skill index and GPA as covariates. For reading and language, there was no statistically significant difference in test results. There was a statistical difference mathematics-computation. Block mathematics is an ideal format for obtaining more credits in mathematics, but the block format does little for mathematics achievement and conceptual understanding. The results have content specific implications for schools, administrations, and school boards who are considering block scheduling adoption.

  11. Investigations into Generalization of Constraint-Based Scheduling Theories with Applications to Space Telescope Observation Scheduling

    Science.gov (United States)

    Muscettola, Nicola; Smith, Steven S.

    1996-01-01

    This final report summarizes research performed under NASA contract NCC 2-531 toward generalization of constraint-based scheduling theories and techniques for application to space telescope observation scheduling problems. Our work into theories and techniques for solution of this class of problems has led to the development of the Heuristic Scheduling Testbed System (HSTS), a software system for integrated planning and scheduling. Within HSTS, planning and scheduling are treated as two complementary aspects of the more general process of constructing a feasible set of behaviors of a target system. We have validated the HSTS approach by applying it to the generation of observation schedules for the Hubble Space Telescope. This report summarizes the HSTS framework and its application to the Hubble Space Telescope domain. First, the HSTS software architecture is described, indicating (1) how the structure and dynamics of a system is modeled in HSTS, (2) how schedules are represented at multiple levels of abstraction, and (3) the problem solving machinery that is provided. Next, the specific scheduler developed within this software architecture for detailed management of Hubble Space Telescope operations is presented. Finally, experimental performance results are given that confirm the utility and practicality of the approach.

  12. NASA Schedule Management Handbook

    Science.gov (United States)

    2011-01-01

    The purpose of schedule management is to provide the framework for time-phasing, resource planning, coordination, and communicating the necessary tasks within a work effort. The intent is to improve schedule management by providing recommended concepts, processes, and techniques used within the Agency and private industry. The intended function of this handbook is two-fold: first, to provide guidance for meeting the scheduling requirements contained in NPR 7120.5, NASA Space Flight Program and Project Management Requirements, NPR 7120.7, NASA Information Technology and Institutional Infrastructure Program and Project Requirements, NPR 7120.8, NASA Research and Technology Program and Project Management Requirements, and NPD 1000.5, Policy for NASA Acquisition. The second function is to describe the schedule management approach and the recommended best practices for carrying out this project control function. With regards to the above project management requirements documents, it should be noted that those space flight projects previously established and approved under the guidance of prior versions of NPR 7120.5 will continue to comply with those requirements until project completion has been achieved. This handbook will be updated as needed, to enhance efficient and effective schedule management across the Agency. It is acknowledged that most, if not all, external organizations participating in NASA programs/projects will have their own internal schedule management documents. Issues that arise from conflicting schedule guidance will be resolved on a case by case basis as contracts and partnering relationships are established. It is also acknowledged and understood that all projects are not the same and may require different levels of schedule visibility, scrutiny and control. Project type, value, and complexity are factors that typically dictate which schedule management practices should be employed.

  13. Estimating exponential scheduling preferences

    DEFF Research Database (Denmark)

    Hjorth, Katrine; Börjesson, Maria; Engelson, Leonid

    2015-01-01

    Different assumptions about travelers' scheduling preferences yield different measures of the cost of travel time variability. Only few forms of scheduling preferences provide non-trivial measures which are additive over links in transport networks where link travel times are arbitrarily...... of car drivers' route and mode choice under uncertain travel times. Our analysis exposes some important methodological issues related to complex non-linear scheduling models: One issue is identifying the point in time where the marginal utility of being at the destination becomes larger than the marginal...

  14. The shop floor scheduling game

    NARCIS (Netherlands)

    Riezebos, Jan; Slomp, Jannes

    1995-01-01

    The aim of the shop floor scheduling game is getting participants acquainted with: - developing robust planning and scheduling procedures; - accepting orders under uncertainty and competition; - using information from cost accounting in scheduling; - creating an adequate communication structure

  15. Managerial implications and suitability of a master surgical scheduling approach

    NARCIS (Netherlands)

    J.M. van Oostrum (Jeroen); E. Bredenhoff (Eelco); E.W. Hans (Erwin)

    2008-01-01

    textabstractMaster surgical scheduling can improve manageability and efficiency of operating room departments. This approach cyclically executes a master surgical schedule of surgery types. These surgery types need to be constructed with low variability to be efficient. Each surgery type is

  16. DMEPOS Fee Schedule

    Data.gov (United States)

    U.S. Department of Health & Human Services — The list contains the fee schedule amounts, floors, and ceilings for all procedure codes and payment category, jurisdication, and short description assigned to each...

  17. Estimating exponential scheduling preferences

    DEFF Research Database (Denmark)

    Hjorth, Katrine; Börjesson, Maria; Engelson, Leonid

    time by maximising expected total utility over the day, their departure times are conditional on rates of utility derived at these locations. For forecasting and economic evaluation of planning alternatives, it is desirable to have simple forms of utility rates with few parameters. Several forms...... the travel time is random, Noland and Small (1995) suggested using expected utility theory to derive the reduced form of expected travel time cost that includes the cost of TTV. For the α-β-γ formulation of scheduling preferences and exponential or uniform distribution of travel time, Noland and Small (1995....... The purpose of this paper is to explore how well these scheduling preferences explain behaviour, compared to other possible scheduling models, and whether empirical estimation of the more complex exponential scheduling preferences is feasible. We use data from a stated preference survey conducted among car...

  18. CERN confirms LHC schedule

    CERN Multimedia

    2003-01-01

    The CERN Council held its 125th session on 20 June. Highlights of the meeting included confirmation that the LHC is on schedule for a 2007 start-up, and the announcement of a new organizational structure in 2004.

  19. Decentralized Ground Staff Scheduling

    DEFF Research Database (Denmark)

    Sørensen, M. D.; Clausen, Jens

    2002-01-01

    Typically, ground staff scheduling is centrally planned for each terminal in an airport. The advantage of this is that the staff is efficiently utilized, but a disadvantage is that staff spends considerable time walking between stands. In this paper a decentralized approach for ground staff...... scheduling is investigated. The airport terminal is divided into zones, where each zone consists of a set of stands geographically next to each other. Staff is assigned to work in only one zone and the staff scheduling is planned decentralized for each zone. The advantage of this approach is that the staff...... work in a smaller area of the terminal and thus spends less time walking between stands. When planning decentralized the allocation of stands to flights influences the staff scheduling since the workload in a zone depends on which flights are allocated to stands in the zone. Hence solving the problem...

  20. Clinical Laboratory Fee Schedule

    Data.gov (United States)

    U.S. Department of Health & Human Services — Outpatient clinical laboratory services are paid based on a fee schedule in accordance with Section 1833(h) of the Social Security Act. The clinical laboratory fee...

  1. Project Schedule Simulation

    DEFF Research Database (Denmark)

    Mizouni, Rabeb; Lazarova-Molnar, Sanja

    2015-01-01

    Despite several attempts to accurately predict duration and cost of software projects, initial plans still do not reflect real-life situations. Since commitments with customers are usually decided based on these initial plans, software companies frequently fail to deliver on time and many projects...... overrun both their budget and time. To improve the quality of initial project plans, we show in this paper the importance of (1) reflecting features’ priorities/risk in task schedules and (2) considering uncertainties related to human factors in plan schedules. To make simulation tasks reflect features......’ priority as well as multimodal team allocation, enhanced project schedules (EPS), where remedial actions scenarios (RAS) are added, were introduced. They reflect potential schedule modifications in case of uncertainties and promote a dynamic sequencing of involved tasks rather than the static conventional...

  2. Estimating exponential scheduling preferences

    DEFF Research Database (Denmark)

    Hjorth, Katrine; Börjesson, Maria; Engelson, Leonid

    time by maximising expected total utility over the day, their departure times are conditional on rates of utility derived at these locations. For forecasting and economic evaluation of planning alternatives, it is desirable to have simple forms of utility rates with few parameters. Several forms...... the travel time is random, Noland and Small (1995) suggested using expected utility theory to derive the reduced form of expected travel time cost that includes the cost of TTV. For the α-β-γ formulation of scheduling preferences and exponential or uniform distribution of travel time, Noland and Small (1995....... The purpose of this paper is to explore how well these scheduling preferences explain behaviour, compared to other possible scheduling models, and whether empirical estimation of the more complex exponential scheduling preferences is feasible. We use data from a stated preference survey conducted among car...

  3. Fee Schedules - General Information

    Data.gov (United States)

    U.S. Department of Health & Human Services — A fee schedule is a complete listing of fees used by Medicare to pay doctors or other providers-suppliers. This comprehensive listing of fee maximums is used to...

  4. Physician Fee Schedule Search

    Data.gov (United States)

    U.S. Department of Health & Human Services — This website is designed to provide information on services covered by the Medicare Physician Fee Schedule (MPFS). It provides more than 10,000 physician services,...

  5. CMS Records Schedule

    Data.gov (United States)

    U.S. Department of Health & Human Services — The CMS Records Schedule provides disposition authorizations approved by the National Archives and Records Administration (NARA) for CMS program-related records...

  6. Resource Minimization Job Scheduling

    Science.gov (United States)

    Chuzhoy, Julia; Codenotti, Paolo

    Given a set J of jobs, where each job j is associated with release date r j , deadline d j and processing time p j , our goal is to schedule all jobs using the minimum possible number of machines. Scheduling a job j requires selecting an interval of length p j between its release date and deadline, and assigning it to a machine, with the restriction that each machine executes at most one job at any given time. This is one of the basic settings in the resource-minimization job scheduling, and the classical randomized rounding technique of Raghavan and Thompson provides an O(logn/loglogn)-approximation for it. This result has been recently improved to an O(sqrt{log n})-approximation, and moreover an efficient algorithm for scheduling all jobs on O((OPT)^2) machines has been shown. We build on this prior work to obtain a constant factor approximation algorithm for the problem.

  7. PAR Loop Schedule Review

    Energy Technology Data Exchange (ETDEWEB)

    Schaffer, Jr.; W.F.

    1958-04-30

    The schedule for the installation of the PAR slurry loop experiment in the South Facility of the ORR has been reviewed and revised. The design, fabrications and Installation is approximately two weeks behind schedule at this time due to many factors; however, indications are that this time can be made up. Design is estimated to be 75% complete, fabrication 32% complete and installation 12% complete.

  8. 77 FR 1549 - Order Limiting Scheduled Operations at Newark Liberty International Airport

    Science.gov (United States)

    2012-01-10

    ... 15, 2012. The construction schedule, which may be adjusted because of weather conditions, is: Nightly..., and the construction schedule, which limits the closures, reflects those discussions. FAA Analysis... Newark Liberty International Airport (EWR) due to construction at the airport during the summer 2012...

  9. An Augmented Lagrangian Approach for Scheduling Problems

    Science.gov (United States)

    Nishi, Tatsushi; Konishi, Masami

    The paper describes an augmented Lagrangian decomposition and coordination approach for solving single machine scheduling problems to minimize the total weighted tardiness. The problem belongs to the class of NP-hard combinatorial optimization problem. We propose an augmented Lagrangian decomposition and coordination approach, which is commonly used for continuous optimization problems, for solving scheduling problems despite the fact that the problem is nonconvex and non-differentiable. The proposed method shows a good convergence to a feasible solution without heuristically constructing a feasible solution. The performance of the proposed method is compared with that of an ordinary Lagrangian relaxation.

  10. TANK OPERATIONS CONTRACT CONSTRUCTION MANAGEMENT METHODOLOGY UTILIZING THE AGENCY METHOD OF CONSTRUCTION MANAGEMENT TO SAFELY AND EFFECTIVELY COMPLETE NUCLEAR CONSTRUCTION WORK

    Energy Technology Data Exchange (ETDEWEB)

    LESO KF; HAMILTON HM; FARNER M; HEATH T

    2010-01-14

    contractor is mentored and supported utilizing the principles of the Construction Industry Institute (CII) Partnering process. Some of the key mentoring and partnering areas that are explored in this paper are, internal and external safety professional support, subcontractor safety teams and the interface with project and site safety teams, quality assurance program support to facilitate compliance with NQA-1, construction, team roles and responsibilities, work definition for successful fixed price contracts, scheduling and interface with project schedules and cost projection/accruals. The practical application of the CII Partnering principles, with the Construction Management expertise of URS, has led to a highly successful construction model that also meets small business contracting goals.

  11. Scheduling jobs that arrive over time

    Energy Technology Data Exchange (ETDEWEB)

    Phillips, C. [Sandia National Labs., Albuquerque, NM (United States); Stein, C. [Dartmouth Coll., Hanover, NH (United States); Wein, J. [Polytechnic Univ., Brooklyn, NY (United States). Dept. of Computer Science

    1995-04-06

    A natural and basic problem in scheduling theory is to provide good average quality of service to a stream of jobs that arrive over time. In this paper we consider the problem of scheduling n jobs that are released over time in order to minimize the average completion time of the set of jobs. In contrast to the problem of minimizing average completion time when all jobs are available at time 0, all the problems that we consider are NP-hard, and essentially nothing was known about constructing good approximations in polynomial time. We give the first constant-factor approximation algorithms for several variants of the single and parallel machine model. Many of the algorithms are based on interesting algorithmic and structural relationships between preemptive and nonpreemptive schedules and linear programming relaxations of both. Many of the algorithms generalize to the minimization of average weighted completion time as well.

  12. Automated Scheduling Via Artificial Intelligence

    Science.gov (United States)

    Biefeld, Eric W.; Cooper, Lynne P.

    1991-01-01

    Artificial-intelligence software that automates scheduling developed in Operations Mission Planner (OMP) research project. Software used in both generation of new schedules and modification of existing schedules in view of changes in tasks and/or available resources. Approach based on iterative refinement. Although project focused upon scheduling of operations of scientific instruments and other equipment aboard spacecraft, also applicable to such terrestrial problems as scheduling production in factory.

  13. A Definition of Artificial Intelligence

    OpenAIRE

    2012-01-01

    In this paper we offer a formal definition of Artificial Intelligence and this directly gives us an algorithm for construction of this object. Really, this algorithm is useless due to the combinatory explosion. The main innovation in our definition is that it does not include the knowledge as a part of the intelligence. So according to our definition a newly born baby also is an Intellect. Here we differs with Turing's definition which suggests that an Intellect is a person with knowledge gai...

  14. 10 CFR 51.4 - Definitions.

    Science.gov (United States)

    2010-01-01

    ... control measures; (v) Excavation; (vi) Erection of support buildings (such as, construction equipment... its authorized representatives. Construction means the activities in paragraph (1) of this definition... construction are the driving of piles, subsurface preparation, placement of backfill, concrete, or permanent...

  15. 考虑任务排序策略的舰船建造车间虚拟制造单元动态调度%Virtual manufacturing cell dynamic scheduling of ship construction workshop considering the task sorting strategy

    Institute of Scientific and Technical Information of China (English)

    韩文民; 孙晓梅; 孔鹏; 吕洁

    2014-01-01

    为提高舰船制造系统作业调度的柔性和效率,从车间层的作业计划角度出发,研究周期驱动条件下的虚拟制造单元多阶段动态调度问题并构建了动态调度数学模型。模型中考虑了加工任务动态需求、设备加工能力、负荷平衡、同类设备有多台的情况且提出共享资源协调排序策略,以实现最大完工时间和总物料运输距离之和最小化的目标。运用改进蚁群算法与启发式规则的混合算法进行求解。通过某船厂的实际生产数据验证了虚拟单元动态调度方法的可行性和有效性。%In order to improve the flexibility and efficiency of shipbuilding production scheduling system and develop shop floor short - term plans, virtual manufacturing cell multi-period dynamic scheduling model was established in condition of cycle driving mechanism. The model incorporated parameters of the processing task dynamic demand, equipment processing capability, load balance, and similar equipments have multiple; and put forward sharing resources coordination sorting strategy. The objective is to minimize completion time and the total materials and components travelling distance incurred. A hybrid algorithm, based on the improved ant colony algorithm and heuristic rules was proposed to solve the complex scheduling problem. Actual production data proved that the proposed approach was feasible and effective.

  16. Simulation and real-time optimal scheduling: a framework for integration

    Energy Technology Data Exchange (ETDEWEB)

    Macal, C.M.; Nevins, M.R. [Argonne National Lab., IL (United States); Williams, M.K.; Joines, J.C. [Military Traffic Management Command Transportation Engineering Agency, Newport News, VA (United States)

    1997-02-01

    Traditional scheduling and simulation models of the same system differ in several fundamental respects. These include the definition of a schedule, the existence of an objective function which orders schedules and indicates the performance of a given schedule according to specific criteria, and the level of fidelity at which the items are represented and processed through he system. This paper presents a conceptual, object-oriented, architecture for combining a traditional, high-level, scheduling system with a detailed, process- level, discrete-event simulation. A multi-echelon planning framework is established in the context of modeling end-to-end military deployments with the focus on detailed seaport operations.

  17. 智能化专业与其他专业施工范围的划分界定%Division and Definition of Construction Area of Intelligent Speciality and Other Specialities

    Institute of Scientific and Technical Information of China (English)

    陈辉

    2011-01-01

    笔者通过多年来对智能化系统工程项目管理的摸索和学习,在文章中以一个具体工程为例,阐述了工程实施过程中施工范围划分界定的具体应用。%Through the exploration and learning of project management for intelligent systems engineering for many years, the author explains the division and definition of construction area of many specialities in the implementation process of the project.

  18. Modeling and Analysis of Scheduling for Distributed Real-time Embedded Systems

    Institute of Scientific and Technical Information of China (English)

    Hai-Tao Zhang; Gui-Fang Wu

    2010-01-01

    Aimed at the deficiencies of resources based time Petri nets(RBTPN)in doing scheduling analysis for distributed real-time embedded systems,the assemblage condition of complex scheduling sequences is presented to easily compute scheduling length and simplify scheduling analysis.Based on this,a new hierarchical RBTPN model is proposed.The model introduces the definition of transition border set,and represents it as an abstract transition.The abstract transition possesses all resources of the set,and has the highest priority of each resource;the execution time of abstract transition is the longest time of all possible scheduling sequences.According to the characteristics and assemblage condition of RBTPN,the refinement conditions of transition border set are given,and the conditions ensure the correction of scheduling analysis.As a result,it is easy for us to understand the scheduling model and perform scheduling analysis.

  19. CMS multicore scheduling strategy

    Energy Technology Data Exchange (ETDEWEB)

    Perez-Calero Yzquierdo, Antonio [Madrid, CIEMAT; Hernandez, Jose [Madrid, CIEMAT; Holzman, Burt [Fermilab; Majewski, Krista [Fermilab; McCrea, Alison [UC, San Diego

    2014-01-01

    In the next years, processor architectures based on much larger numbers of cores will be most likely the model to continue 'Moore's Law' style throughput gains. This not only results in many more jobs in parallel running the LHC Run 1 era monolithic applications, but also the memory requirements of these processes push the workernode architectures to the limit. One solution is parallelizing the application itself, through forking and memory sharing or through threaded frameworks. CMS is following all of these approaches and has a comprehensive strategy to schedule multicore jobs on the GRID based on the glideinWMS submission infrastructure. The main component of the scheduling strategy, a pilot-based model with dynamic partitioning of resources that allows the transition to multicore or whole-node scheduling without disallowing the use of single-core jobs, is described. This contribution also presents the experiences made with the proposed multicore scheduling schema and gives an outlook of further developments working towards the restart of the LHC in 2015.

  20. Model Migration Schedules

    OpenAIRE

    1981-01-01

    This report draws on the fundamental regularity exhibited by age profiles of migration all over the world to develop a system of hypothetical model schedules that can be used in multiregional population analyses carried out in countries that lack adequate migration data.

  1. Round Robin Schedules.

    Science.gov (United States)

    Iannone, Michael A.

    1983-01-01

    Presented is a computer program written in BASIC that covers round-robin schedules for team matches in competitions. The program was originally created to help teams in a tennis league play one match against every other team. Part of the creation of the program involved use of modulo arithmetic. (MP)

  2. Harmonious personnel scheduling

    NARCIS (Netherlands)

    Fijn van Draat, Laurens; Post, Gerhard; Veltman, Bart; Winkelhuijzen, Wessel

    2006-01-01

    The area of personnel scheduling is very broad. Here we focus on the ‘shift assignment problem’. Our aim is to discuss how ORTEC HARMONY handles this planning problem. In particular we go into the structure of the optimization engine in ORTEC HARMONY, which uses techniques from genetic algorithms, l

  3. Harmonious personnel scheduling

    NARCIS (Netherlands)

    Fijn van Draat, Laurens; Post, Gerhard F.; Veltman, Bart; Winkelhuijzen, Wessel

    2006-01-01

    The area of personnel scheduling is very broad. Here we focus on the ‘shift assignment problem’. Our aim is to discuss how ORTEC HARMONY handles this planning problem. In particular we go into the structure of the optimization engine in ORTEC HARMONY, which uses techniques from genetic algorithms,

  4. Improved Squeaky Wheel Optimisation for Driver Scheduling

    CERN Document Server

    Aickelin, Uwe; Li, Jingpeng

    2008-01-01

    This paper presents a technique called Improved Squeaky Wheel Optimisation for driver scheduling problems. It improves the original Squeaky Wheel Optimisations effectiveness and execution speed by incorporating two additional steps of Selection and Mutation which implement evolution within a single solution. In the ISWO, a cycle of Analysis-Selection-Mutation-Prioritization-Construction continues until stopping conditions are reached. The Analysis step first computes the fitness of a current solution to identify troublesome components. The Selection step then discards these troublesome components probabilistically by using the fitness measure, and the Mutation step follows to further discard a small number of components at random. After the above steps, an input solution becomes partial and thus the resulting partial solution needs to be repaired. The repair is carried out by using the Prioritization step to first produce priorities that determine an order by which the following Construction step then schedul...

  5. 22 CFR 46.1 - Definitions.

    Science.gov (United States)

    2010-04-01

    ... 22 Foreign Relations 1 2010-04-01 2010-04-01 false Definitions. 46.1 Section 46.1 Foreign Relations DEPARTMENT OF STATE VISAS CONTROL OF ALIENS DEPARTING FROM THE UNITED STATES § 46.1 Definitions... public ferry, passenger vessel sailing coastwise on a fixed schedule, excursion vessel, or...

  6. 5 CFR 610.102 - Definitions.

    Science.gov (United States)

    2010-01-01

    ... 5 Administrative Personnel 1 2010-01-01 2010-01-01 false Definitions. 610.102 Section 610.102 Administrative Personnel OFFICE OF PERSONNEL MANAGEMENT CIVIL SERVICE REGULATIONS HOURS OF DUTY Weekly and Daily Scheduling of Work § 610.102 Definitions. In this subpart: Administrative workweek means any period of...

  7. Class Schedules--Computer Loaded or Student Self-Scheduled?

    Science.gov (United States)

    Wall, Edward F.

    1979-01-01

    In the two-step process of student scheduling, the initial phase of course selection is the most important. At Chesterton High School in Indiana, student self-scheduling is preferred over computer loading. (Author/MLF)

  8. CPM scheduling : the Contracting Officers' Guide for risk minimization and claims analysis

    OpenAIRE

    Prather, Craig S.

    1998-01-01

    CIVINS There are several hundred contract management related positions in the Navy's Civil Engineer Corps. Many junior and senior Contracting Officers and their representatives who serve in these positions have little to no experience with approving, monitoring and analyzing contractors' construction schedules. Typically, the contractor submits an initial schedule for approval, however, due to the lack of experience and knowledge, scheduling software and computer hardware to verify schedul...

  9. 49 CFR 1101.1 - Statutory definitions.

    Science.gov (United States)

    2010-10-01

    ... 49 Transportation 8 2010-10-01 2010-10-01 false Statutory definitions. 1101.1 Section 1101.1 Transportation Other Regulations Relating to Transportation (Continued) SURFACE TRANSPORTATION BOARD, DEPARTMENT OF TRANSPORTATION RULES OF PRACTICE DEFINITIONS AND CONSTRUCTION § 1101.1 Statutory definitions. The definitions contained in section 10102...

  10. The robust schedule - A link to improved workflow

    DEFF Research Database (Denmark)

    Lindhard, Søren; Wandahl, Søren

    2012-01-01

    In today’s construction, there is a paramount focus on time, and on the scheduling and control of time. Everything is organized with respect to time. The construction project has to be completed within a fixed and often tight deadline. Otherwise a daily penalty often has to be paid. This pin-down...

  11. The robust schedule - a link to improved workflow

    DEFF Research Database (Denmark)

    Lindhard, Søren Munch; Wandahl, Søren

    2012-01-01

    In today’s construction, there is a paramount focus on time, and on the scheduling and control of time. Everything is organized with respect to time. The construction project has to be completed within a fixed and often tight deadline. Otherwise a daily penalty often has to be paid. This pins dow...

  12. Revisiting conjugate schedules.

    Science.gov (United States)

    MacAleese, Kenneth R; Ghezzi, Patrick M; Rapp, John T

    2015-07-01

    The effects of conjugate reinforcement on the responding of 13 college students were examined in three experiments. Conjugate reinforcement was provided via key presses that changed the clarity of pictures displayed on a computer monitor in a manner proportional to the rate of responding. Experiment 1, which included seven parameters of clarity change per response, revealed that responding decreased as the percentage clarity per response increased for all five participants. These results indicate that each participant's responding was sensitive to intensity change, which is a parameter of conjugate reinforcement schedules. Experiment 2 showed that responding increased during conjugate reinforcement phases and decreased during extinction phases for all four participants. Experiment 3 also showed that responding increased during conjugate reinforcement and further showed that responding decreased during a conjugate negative punishment condition for another four participants. Directions for future research with conjugate schedules are briefly discussed.

  13. 含间歇性电源的电力系统动态有功优化调度的思路构建%Power System Containing Intermittent Power Supply Construction Dynamic Optimization Scheduling of Active Thinking

    Institute of Scientific and Technical Information of China (English)

    车轮

    2014-01-01

    近年来,随着风电场和光伏电站的大量并网,对电力系统的运行造成了一定影响。在电力系统中,可将风电场和光伏电站等作为间歇性电源。为了实现间歇性电源在电力系统内部的合理消纳,有必要制订合理、可行的调度策略,这样不仅可以提高间歇性电源本身的调节能力,还能提高电力系统运行的安全性和经济性。基于此,就含间歇性电源的电力系统动态有功优化调度思路的构建展开研究。%In recent years, with wind farms and solar power plants and a large network of operation of power systems caused some impact. In the power system can be such as wind farms and solar power plants, as intermittent power supply. In order to achieve intermittent electricity supply at a reasonable consumptive internal system, it is necessary to establish a reasonable and feasible scheduling policy, so not only can improve the intermittent ability to regulate its own power supply, but also improve the operation of the power system security and economy. Based on this, the intermittent power supply systems with active optimization of dynamic scheduling idea to build a study.

  14. Multiprocessor scheduling with rejection

    Energy Technology Data Exchange (ETDEWEB)

    Bartal, Y. [Tel-Aviv Univ. (Israel); Leonardi, S.; Marchetti-Spaccamela, A. [Universita di Roma (Italy); Sgall, J. [Mathematical Inst., Zitna (Czechoslovakia)] [and others

    1996-12-31

    We consider a version of multiprocessor scheduling with the special feature that jobs may be rejected for a certain penalty. An instance of the problem is given by m identical parallel machines and a set of n jobs, each job characterized by a processing time and a penalty. In the on-line version the jobs arrive one by one and we have to schedule or reject a job before we have any information about future jobs. The objective is to minimize the makespan of the schedule for accepted jobs plus the sum of the penalties of rejected jobs. The main result is a 1 + {phi} {approx} 2.618 competitive algorithm for the on-line version of the problem, where 0 is the golden ratio. A matching lower bound shows that this is the best possible algorithm working for all m. For fixed m we give improved bounds, in particular for m = 2 we give an optimal {phi} {approx} 1.618 competitive algorithm. For the off-line problem we present a fully polynomial approximation scheme for fixed m and an approximation algorithm which runs in time O(n log n) for arbitrary m and guarantees 2 - 1/m approximation ratio.

  15. CMS Multicore Scheduling Strategy

    CERN Document Server

    Perez-Calero Yzquierdo, Antonio

    2014-01-01

    In the next years, processor architectures based on much larger numbers of cores will be most likely the model to continue Moores Law style throughput gains. This not only results in many more jobs in parallel running the LHC Run 1 era monolithic applications. Also the memory requirements of these processes push the workernode architectures to the limit. One solution is parallelizing the application itself, through forking and memory sharing or through threaded frameworks. CMS is following all of these approaches and has a comprehensive strategy to schedule multi-core jobs on the GRID based on the glideIn WMS submission infrastructure. We will present the individual components of the strategy, from special site specific queues used during provisioning of resources and implications to scheduling; to dynamic partitioning within a single pilot to allow to transition to multi-core or whole-node scheduling on site level without disallowing single-core jobs. In this presentation, we will present the experiences mad...

  16. Customer Appeasement Scheduling

    CERN Document Server

    Nikseresht, Mohammad R; Maheshwari, Anil

    2010-01-01

    Almost all of the current process scheduling algorithms which are used in modern operating systems (OS) have their roots in the classical scheduling paradigms which were developed during the 1970's. But modern computers have different types of software loads and user demands. We think it is important to run what the user wants at the current moment. A user can be a human, sitting in front of a desktop machine, or it can be another machine sending a request to a server through a network connection. We think that OS should become intelligent to distinguish between different processes and allocate resources, including CPU, to those processes which need them most. In this work, as a first step to make the OS aware of the current state of the system, we consider process dependencies and interprocess communications. We are developing a model, which considers the need to satisfy interactive users and other possible remote users or customers, by making scheduling decisions based on process dependencies and interproce...

  17. Scheduling a C-Section

    Science.gov (United States)

    ... Pregnancy > Labor & birth > Scheduling a c-section Scheduling a c-section E-mail to a friend Please fill in all fields. Please enter ... and develop before she’s born. Why can scheduling a c-section for non-medical reasons be a ...

  18. Flexible Scheduling: Making the Transition

    Science.gov (United States)

    Creighton, Peggy Milam

    2008-01-01

    Citing literature that supports the benefits of flexible scheduling on student achievement, the author exhorts readers to campaign for flexible scheduling in their library media centers. She suggests tips drawn from the work of Graziano (2002), McGregor (2006) and Stripling (1997) for making a smooth transition from fixed to flexible scheduling:…

  19. Probabilistic Bisimulation for Realistic Schedulers

    DEFF Research Database (Denmark)

    Eisentraut, Christian; Godskesen, Jens Christian; Hermanns, Holger

    2015-01-01

    . This holds in the classical context of arbitrary schedulers, but it has been argued that this class of schedulers is unrealistically powerful. This paper studies a strictly coarser notion of bisimilarity, which still enjoys these properties in the context of realistic subclasses of schedulers: Trace...

  20. Continuous Media Tasks Scheduling Algorithm

    Directory of Open Access Journals (Sweden)

    Myungryun Yoo

    2016-03-01

    Full Text Available In this paper the authors propose modified proportional share scheduling algorithm considering the characteristics of continuous media such as its continuity and time dependency. Proposed scheduling algorithm shows graceful degradation of performance in overloaded situation and decreases the number of context switching. Proposed scheduling algorithm is evaluated using several numerical tests under various conditions, especially overloaded situation.

  1. Flexible Software for Flexible Scheduling

    Science.gov (United States)

    Economou, Frossie; Jenness, Tim; Tilanus, Remo P. J.; Hirst, Paul; Adamson, Andy J.; Rippa, Mathew; Delorey, Kynan K.; Isaak, Kate G.

    The JAC Observation Management Project (OMP) provides software for the James Clerk Maxwell (JCMT) and the United Kingdom Infrared (UKIRT) telescopes that manages the life-cycle of flexibly scheduled observations. Its aim is to increase observatory efficiency under flexible (queue) scheduled observing, without depriving the principal investigator (PI) of the flexibility associated with classical scheduling.

  2. Scheduling IT Staff at a Bank: A Mathematical Programming Approach

    Directory of Open Access Journals (Sweden)

    M. Labidi

    2014-01-01

    Full Text Available We address a real-world optimization problem: the scheduling of a Bank Information Technologies (IT staff. This problem can be defined as the process of constructing optimized work schedules for staff. In a general sense, it requires the allocation of suitably qualified staff to specific shifts to meet the demands for services of an organization while observing workplace regulations and attempting to satisfy individual work preferences. A monthly shift schedule is prepared to determine the shift duties of each staff considering shift coverage requirements, seniority-based workload rules, and staff work preferences. Due to the large number of conflicting constraints, a multiobjective programming model has been proposed to automate the schedule generation process. The suggested mathematical model has been implemented using Lingo software. The results indicate that high quality solutions can be obtained within a few seconds compared to the manually prepared schedules.

  3. Effects on nurse retention. An experiment with scheduling.

    Science.gov (United States)

    Choi, T; Jameson, H; Brekke, M L; Podratz, R O; Mundahl, H

    1986-11-01

    Four randomly selected nursing groups were assigned to three experimental groups and one control group to test the relative impact of three experimental nursing schedules, using a before-after design. The three experimental treatments were straight shifts; regular schedule but with unlimited requests for changes; and individual station-designed schedules. Before treatment, score differences between the experimental and control groups were limited to one of 36 highly reliable scales specifically constructed and pretested to gauge effects of scheduling. This single difference was judged not to be significantly related to experimental outcomes. Because of a poor job market situation, retention was not affected significantly by any of the three treatments, but root causes of turnover were. Results of the experiment showed that individual station-designed schedules triggered the most changes that favor retention. In contrast, the other two treatments unexpectedly increased nurses' own sense of marketability and reduced teamwork among nurses. Reasons accounting for the results are discussed in the text.

  4. The Single And Multi Project Approach To Planning And Scheduling

    DEFF Research Database (Denmark)

    Andersson, Niclas

    2008-01-01

    with the challenging coordination of the work of several actors. The project planning and scheduling should, from the subcontractor’s perspective, allow for scope and flexibility so that the subcontractor can reallocate its resources at will between its ongoing projects and thereby optimise its own production. However......, reallocations of subcontracting resources lead to project interruptions which counteract on the overall productivity of the single construction project. Thus, there is a planning and scheduling conflict between the operational multi project management of the subcontracting firm and the management of single...... projects carried out by the management on site. This paper explains the single and multi project perspective on construction planning and scheduling represented by the main and the subcontractors and further, it describes how the prevailing scheduling method of today, i.e. the critical path method, conduce...

  5. Design and Realization of the Safety Production Scheduling System

    Directory of Open Access Journals (Sweden)

    Qiang Fan

    2013-01-01

    Full Text Available In this study, we have a research of the design and realization of the Safety Production Scheduling System. Urged by the government departments as well as safety supervising institutions, many coal enterprises are embarking on designing and constructing an information system platform for safety production and scheduling. How to establish a systematic, comprehensive, standardized and scientific management platform for the safety production and scheduling has become a hot issue in the coal industry, which is also an important move to integrate various safety management measures in order to prevent major safety accidents and keep up with the international industry status. Taking a successful, large-scale safety production and scheduling system for example, this study elaborates on its overall design and construction. When the system is completed, it will play an important role in strengthening safety production of the coal mines, preventing accidents as well as increasing the overall safety level of the coal industry.

  6. Literature Review on the Hybrid Flow Shop Scheduling Problem with Unrelated Parallel Machines

    Directory of Open Access Journals (Sweden)

    Eliana Marcela Peña Tibaduiza

    2017-01-01

    Full Text Available Context: The flow shop hybrid problem with unrelated parallel machines has been less studied in the academia compared to the flow shop hybrid with identical processors. For this reason, there are few reports about the kind of application of this problem in industries. Method: A literature review of the state of the art on flow-shop scheduling problem was conducted by collecting and analyzing academic papers on several scientific databases. For this aim, a search query was constructed using keywords defining the problem and checking the inclusion of unrelated parallel machines in such definition; as a result, 50 papers were finally selected for this study. Results: A classification of the problem according to the characteristics of the production system was performed, also solution methods, constraints and objective functions commonly used are presented. Conclusions: An increasing trend is observed in studies of flow shop with multiple stages, but few are based on industry case-studies.

  7. Artificial intelligence for the CTA Observatory scheduler

    Science.gov (United States)

    Colomé, Josep; Colomer, Pau; Campreciós, Jordi; Coiffard, Thierry; de Oña, Emma; Pedaletti, Giovanna; Torres, Diego F.; Garcia-Piquer, Alvaro

    2014-08-01

    The Cherenkov Telescope Array (CTA) project will be the next generation ground-based very high energy gamma-ray instrument. The success of the precursor projects (i.e., HESS, MAGIC, VERITAS) motivated the construction of this large infrastructure that is included in the roadmap of the ESFRI projects since 2008. CTA is planned to start the construction phase in 2015 and will consist of two arrays of Cherenkov telescopes operated as a proposal-driven open observatory. Two sites are foreseen at the southern and northern hemispheres. The CTA observatory will handle several observation modes and will have to operate tens of telescopes with a highly efficient and reliable control. Thus, the CTA planning tool is a key element in the control layer for the optimization of the observatory time. The main purpose of the scheduler for CTA is the allocation of multiple tasks to one single array or to multiple sub-arrays of telescopes, while maximizing the scientific return of the facility and minimizing the operational costs. The scheduler considers long- and short-term varying conditions to optimize the prioritization of tasks. A short-term scheduler provides the system with the capability to adapt, in almost real-time, the selected task to the varying execution constraints (i.e., Targets of Opportunity, health or status of the system components, environment conditions). The scheduling procedure ensures that long-term planning decisions are correctly transferred to the short-term prioritization process for a suitable selection of the next task to execute on the array. In this contribution we present the constraints to CTA task scheduling that helped classifying it as a Flexible Job-Shop Problem case and finding its optimal solution based on Artificial Intelligence techniques. We describe the scheduler prototype that uses a Guarded Discrete Stochastic Neural Network (GDSN), for an easy representation of the possible long- and short-term planning solutions, and Constraint

  8. Visualization and Simulation in Scheduling

    Directory of Open Access Journals (Sweden)

    R. Čapek

    2008-01-01

    Full Text Available This paper deals with the representation of scheduling results and it introduces a new tool for visualization and simulation in time scheduling called VISIS. The purpose of this tool is to provide an environment for visualization, e.g. in production line scheduling. The simulation also proposes a way to simulate the influence of a schedule on a user defined system, e.g. for designing filters in digital signal processing. VISIS arises from representing scheduling results using the well-known Gantt chart. The application is implemented in the Matlab programming environment using Simulink and the Virtual Reality toolbox. 

  9. CPU Scheduling Algorithms: A Survey

    Directory of Open Access Journals (Sweden)

    Imran Qureshi

    2014-01-01

    Full Text Available Scheduling is the fundamental function of operating system. For scheduling, resources of system shared among processes which are going to be executed. CPU scheduling is a technique by which processes are allocating to the CPU for a specific time quantum. In this paper the review of different scheduling algorithms are perform with different parameters, such as running time, burst time and waiting times etc. The reviews algorithms are first come first serve, Shortest Job First, Round Robin, and Priority scheduling algorithm.

  10. Investigation of the definition construction water level about river harbor dock%关于确定河港码头施工水位的探讨

    Institute of Scientific and Technical Information of China (English)

    张智洪; 徐克健

    2001-01-01

    笔者论述了港口水工建筑物施工水位的概念及其影 响因素,指出了合理地确定港口码头施工水位的重要性,总结了我国各类江河河段设计河港 码头施工水位的经验,提出了施工水位的选择范围,供设计人员设计时参考.%The concept and influencial factors of the port wate rfront structures construction water level are discussed in the pater,and impo rtance of the reasonable decision of the construction water level is shown for t he port terminal,and the experience of the construction water level designed is summed up for the river harbor dock on all types of river reach in China,and the selective extent is advanced to the construction water level to refer for the d esigner.

  11. Scheduling theory, algorithms, and systems

    CERN Document Server

    Pinedo, Michael L

    2016-01-01

    This new edition of the well-established text Scheduling: Theory, Algorithms, and Systems provides an up-to-date coverage of important theoretical models in the scheduling literature as well as important scheduling problems that appear in the real world. The accompanying website includes supplementary material in the form of slide-shows from industry as well as movies that show actual implementations of scheduling systems. The main structure of the book, as per previous editions, consists of three parts. The first part focuses on deterministic scheduling and the related combinatorial problems. The second part covers probabilistic scheduling models; in this part it is assumed that processing times and other problem data are random and not known in advance. The third part deals with scheduling in practice; it covers heuristics that are popular with practitioners and discusses system design and implementation issues. All three parts of this new edition have been revamped, streamlined, and extended. The reference...

  12. 谈如何做好施工企业机关车辆管理及调度工作%On vehicle management at office of construction enterprises and their scheduling

    Institute of Scientific and Technical Information of China (English)

    王有德

    2012-01-01

    Combining with the office responsibilities and many-year office vehicle operation experience, the paper explores how to schedule the management of the office vehicle, and points out the recognition improvement, the reasonable arrangement for the plan, the establishment of the management system and the technical and duty enhancement should be considered, so as to enhance the institutionalization and standardization of the vehicle management at enterprise offices.%结合自身岗位职责和多年机关车辆运管经验,针对施工企业点多、线长、面广的特点,探讨了如何做好机关车辆的管理调度工作,提出应从思想上提高认识,工作中合理计划安排,建立健全管理制度,强化技术和责任四方面着手,促进企业机关车辆管理制度化,规范化。

  13. The Coordinated Scheduling Support System of Production and Delivery

    Directory of Open Access Journals (Sweden)

    Ming-Feng Yang

    2009-01-01

    Full Text Available Problem statement: Traditional scheduling models which only address the sequence of jobs to be processed at the production stage under some criteria are no longer suitable and should be extended to cope with the distribution stage after production. In a rapidly changing environment, competition among enterprises has a tendency to turn towards competing between supply chain systems instead of competing between individual companies. Emphasizing on the coordination and the integration among various members of a supply chain has become one of the vital strategies for the modern manufacturers to gain competitive advantages. Approach: This research focuses mainly on a class of two-stage scheduling problem, in which jobs need to be delivered to customers by vehicles after the completion of their respective production. It is assumed that the transportation time of a vehicle is constant and jobs to be delivered occupy different physical spaces. Results: The result of this research is to show the scheduling problem with the objective of minimizing total completion time is intractable and to develop a heuristic by incorporating properties inherited in an the optimal schedule. In addition, we take a Decision Support System (DSS view to construct a Scheduling Support System (SSS for solving the scheduling problem with delivery coordination. Conclusion/Recommendations: The scheduling support system with an additional problem management subsystem can provide more useful information for users when the management makes a strategic decision than traditional scheduling methods can. It can give firms a competitive advantage on the global competitive market.

  14. On program restructuring, scheduling, and communication for parallel processor systems

    Energy Technology Data Exchange (ETDEWEB)

    Polychronopoulos, Constantine D.

    1986-08-01

    This dissertation discusses several software and hardware aspects of program execution on large-scale, high-performance parallel processor systems. The issues covered are program restructuring, partitioning, scheduling and interprocessor communication, synchronization, and hardware design issues of specialized units. All this work was performed focusing on a single goal: to maximize program speedup, or equivalently, to minimize parallel execution time. Parafrase, a Fortran restructuring compiler was used to transform programs in a parallel form and conduct experiments. Two new program restructuring techniques are presented, loop coalescing and subscript blocking. Compile-time and run-time scheduling schemes are covered extensively. Depending on the program construct, these algorithms generate optimal or near-optimal schedules. For the case of arbitrarily nested hybrid loops, two optimal scheduling algorithms for dynamic and static scheduling are presented. Simulation results are given for a new dynamic scheduling algorithm. The performance of this algorithm is compared to that of self-scheduling. Techniques for program partitioning and minimization of interprocessor communication for idealized program models and for real Fortran programs are also discussed. The close relationship between scheduling, interprocessor communication, and synchronization becomes apparent at several points in this work. Finally, the impact of various types of overhead on program speedup and experimental results are presented. 69 refs., 74 figs., 14 tabs.

  15. PERT在建设项目施工进度风险中的应用%THE APPLICATION OF THE PERT IN THE CONSTRUCTION PROJECT SCHEDULE OF THE RISK

    Institute of Scientific and Technical Information of China (English)

    王文君; 顾伟红

    2012-01-01

    工程中的各种风险会引起工程中各道工序持续时间的不确定性,因此计划评审技术(PERT)在进度风险中得到广泛的应用。该方法主要假定每项活动都是随机独立的、服从正态分布。根据PERT的三时估计,估算出各道工序的期望持续时间、期望工期以及整个项目的完工概率。最后应用PERT模型对工程实例进行进度风险研究分析。%Because the duration of the each process caused by the every risk is uncertain in the construction, PERT is wJdel.y used m the progress risk, This method mainly hypothesizes that every activity is randomly independent, and obeys normal distribution. According to the PERT's three-time estimate, the paper estimates the expected duration of the each process, then calculates the expected construction period and the whole project' s completion probability. In the end the paper uses the PERT modle to study and analysis the progress risk of the construction example.

  16. 4D Applications of GIS in Construction Management

    Directory of Open Access Journals (Sweden)

    A. Chaitanya Kumar

    2017-01-01

    Full Text Available Construction industries broadly involve different set of construction activities which are to be executed as per schedule and the major software used for scheduling is PRIMAVERA and Microsoft Project (MSP. But the software still lacks a feature of providing spatial aspects of information in construction schedule. Recently, advanced technology like 4D GIS plays a major role in overcoming the limitation of the software. 4D GIS technology includes integration of 2D drawings from AutoCAD and schedules prepared in PRIMAVERA software. In the present study, a multistair residential building has been selected. ARCMAP 10.2 is used for interlinking of schedules as well as drawings and ARCSCENE has been used for developing 4D view. This linkage between scheduled activities and respective drawings in GIS helps in identifying construction sequences and also in detecting logical errors that occur in project schedules. The developed 4D view provides better visualization of construction progress of a project.

  17. SCHEDULING PROBLEMS-AN OVERVIEW

    Institute of Scientific and Technical Information of China (English)

    Asmuliardi MULUK; Hasan AKPOLAT; Jichao XU

    2003-01-01

    There seems to be a significant gap between the theoretical and the practical aspects of scheduling problems in the job shop environment. Theoretically, scheduling systems are designed on the basis of an optimum approach to the scheduling model. However in the practice, the optimum that is built into the scheduling applications seems to face some challenges when dealing with the dynamic character of a scheduling system, for instance machine breakdown or change of orders. Scheduling systems have become quite complex in the past few years. Competitive business environments and shorter product life cycles are the imminent challenges being faced by many companies these days.These challenges push companies to anticipate a demand driven supply chain in their business environment. A demand-driven supply chain incorporates the customer view into the supply chain processes. As a consequence of this, scheduling as a core process of the demand-driven supply chain must also reflect the customer view. In addition, other approaches to solving scheduling problems, for instance approaches based on human factors, prefer the scheduling system to be more flexible in both design and implementation. After discussion of these factors, the authors propose the integration of a different set of criteria for the development of scheduling systems which not only appears to have a better flexibility but also increased customer-focus.

  18. Construction Report, 2000.

    Science.gov (United States)

    Abramson, Paul

    2000-01-01

    Provides cost data on college and university construction projects completed for 1999 and projected for completion in 2000 by region. New building cost comparisons and profiles are listed, including basic information on 61 dormitory projects schedules to be completed in 2000. (GR)

  19. A Framework for Simplifying the Development of Kernel Schedulers: Design and Performance Evaluation

    DEFF Research Database (Denmark)

    Muller, Gilles; Lawall, Julia Laetitia; Duschene, Hervé

    2005-01-01

    Writing a new scheduler and integrating it into an existing OS is a daunting task, requiring the understanding of multiple low-level kernel mechanisms. Indeed, implementing a new scheduler is outside the expertise of application programmers, even though they are the ones who understand best...... the scheduling needs of their applications. To address these problems, we present the design of Bossa, a language targeted toward the development of scheduling policies. Bossa provides high-level abstractions that are specific to the domain of scheduling. These constructs simplify the task of specifying a new...

  20. MODIFIED BOTTLENECK-BASED PROCEDURE FOR LARGE-SCALE FLOW-SHOP SCHEDULING PROBLEMS WITH BOTTLENECK

    Institute of Scientific and Technical Information of China (English)

    ZUO Yan; GU Hanyu; XI Yugeng

    2006-01-01

    A new bottleneck-based heuristic for large-scale flow-shop scheduling problems with a bottleneck is proposed, which is simpler but more tailored than the shifting bottleneck (SB)procedure. In this algorithm, a schedule for the bottleneck machine is first constructed optimally and then the non-bottleneck machines are scheduled around the bottleneck schedule by some effective dispatching rules. Computational results show that the modified bottleneck-based procedure can achieve a tradeoff between solution quality and computational time comparing with SB procedure for medium-size problems. Furthermore it can obtain a good solution in quite short time for large-scale scheduling problems.

  1. 10 CFR 950.3 - Definitions.

    Science.gov (United States)

    2010-01-01

    ... receive a combined license and commence construction. System-level construction schedule means an... costs under the Standby Support Contract. Combined license means a combined construction and operating license (COL) for an advanced nuclear facility issued by the Commission. Commencement of...

  2. The LSST OCS scheduler design

    Science.gov (United States)

    Delgado, Francisco; Schumacher, German

    2014-08-01

    The Large Synoptic Survey Telescope (LSST) is a complex system of systems with demanding performance and operational requirements. The nature of its scientific goals requires a special Observatory Control System (OCS) and particularly a very specialized automatic Scheduler. The OCS Scheduler is an autonomous software component that drives the survey, selecting the detailed sequence of visits in real time, taking into account multiple science programs, the current external and internal conditions, and the history of observations. We have developed a SysML model for the OCS Scheduler that fits coherently in the OCS and LSST integrated model. We have also developed a prototype of the Scheduler that implements the scheduling algorithms in the simulation environment provided by the Operations Simulator, where the environment and the observatory are modeled with real weather data and detailed kinematics parameters. This paper expands on the Scheduler architecture and the proposed algorithms to achieve the survey goals.

  3. DTS: Building custom, intelligent schedulers

    Science.gov (United States)

    Hansson, Othar; Mayer, Andrew

    1994-01-01

    DTS is a decision-theoretic scheduler, built on top of a flexible toolkit -- this paper focuses on how the toolkit might be reused in future NASA mission schedulers. The toolkit includes a user-customizable scheduling interface, and a 'Just-For-You' optimization engine. The customizable interface is built on two metaphors: objects and dynamic graphs. Objects help to structure problem specifications and related data, while dynamic graphs simplify the specification of graphical schedule editors (such as Gantt charts). The interface can be used with any 'back-end' scheduler, through dynamically-loaded code, interprocess communication, or a shared database. The 'Just-For-You' optimization engine includes user-specific utility functions, automatically compiled heuristic evaluations, and a postprocessing facility for enforcing scheduling policies. The optimization engine is based on BPS, the Bayesian Problem-Solver (1,2), which introduced a similar approach to solving single-agent and adversarial graph search problems.

  4. Littoral Combat Ship Crew Scheduling

    Science.gov (United States)

    2015-03-01

    package DON Department of the Navy F&R Fix and Relax GAMS General Algebraic Modeling System LCS Littoral Combat Ship LCSRON Littoral Combat Ship...but that can be acceptable depending on the scheduler needs. F&R produces superior long-term schedules when compared to a similar-length RH schedule...LEFT BLANK 29 IV. MODEL IMPLEMENTATION LCSS is implemented with the General Algebraic Modeling System (GAMS) using the GAMS/CPLEX (GAMS, 2014

  5. Definition and Standardization Construction of the Public Security Law Enforcement Behavior%论公安执法行为之界定与规范化建设

    Institute of Scientific and Technical Information of China (English)

    贾方舟

    2016-01-01

    完善执法权力运行机制作为公安改革的七大任务之一,在基层公安工作中占据执牛耳之地位。但是实践中对公安执法行为的界定并不清晰,尤其是个人行为和公务行为、行政管理行为和刑事侦查行为的区分争议较大。通过系统的规范化建设,公安执法行为必将立足于真正的人权保障与社会正义。%We will improve the mechanism of law enforcement power operation as one of the seven tasks of public security re-form,ranking of the best player in the grass-roots public security work. But the practice of public security law enforcement ac-tion definition is not clear. Especially the distinction between the individual behavior and public behavior and the one between the administrative behavior and criminal investigation behavior are controversial. Through the standardization of the system con-struction,the public security law enforcement activities will be based on the real human rights and social justice.

  6. Instruction Scheduling Across Control Flow

    Directory of Open Access Journals (Sweden)

    Martin Charles Golumbic

    1993-01-01

    Full Text Available Instruction scheduling algorithms are used in compilers to reduce run-time delays for the compiled code by the reordering or transformation of program statements, usually at the intermediate language or assembly code level. Considerable research has been carried out on scheduling code within the scope of basic blocks, i.e., straight line sections of code, and very effective basic block schedulers are now included in most modern compilers and especially for pipeline processors. In previous work Golumbic and Rainis: IBM J. Res. Dev., Vol. 34, pp.93–97, 1990, we presented code replication techniques for scheduling beyond the scope of basic blocks that provide reasonable improvements of running time of the compiled code, but which still leaves room for further improvement. In this article we present a new method for scheduling beyond basic blocks called SHACOOF. This new technique takes advantage of a conventional, high quality basic block scheduler by first suppressing selected subsequences of instructions and then scheduling the modified sequence of instructions using the basic block scheduler. A candidate subsequence for suppression can be found by identifying a region of a program control flow graph, called an S-region, which has a unique entry and a unique exit and meets predetermined criteria. This enables scheduling of a sequence of instructions beyond basic block boundaries, with only minimal changes to an existing compiler, by identifying beneficial opportunities to cover delays that would otherwise have been beyond its scope.

  7. Scheduling the powering tests

    CERN Document Server

    Barbero-Soto, E; Casas-Lino, M P; Fernandez-Robles, C; Foraz, K; Pojer, M; Saban, R; Schmidt, R; Solfaroli-Camillocci, M; Vergara-Fernandez, A

    2008-01-01

    The Large Hadron Collider is now entering in its final phase before receiving beam, and the activities at CERN between 2007 and 2008 have shifted from installation work to the commissioning of the technical systems ("hardware commissioning"). Due to the unprecedented complexity of this machine, all the systems are or will be tested as far as possible before the cool-down starts. Systems are firstly tested individually before being globally tested together. The architecture of LHC, which is partitioned into eight cryogenically and electrically independent sectors, allows the commissioning on a sector by sector basis. When a sector reaches nominal cryogenic conditions, commissioning of the magnet powering system to nominal current for all magnets can be performed. This paper briefly describes the different activities to be performed during the powering tests of the superconducting magnet system and presents the scheduling issues raised by co-activities as well as the management of resources.

  8. Routing and scheduling problems

    DEFF Research Database (Denmark)

    Reinhardt, Line Blander

    In today’s globalized society, transport contributes to our daily life in many different ways. The production of the parts for a shelf ready product may take place on several continents and our travel between home and work, vacation travel and business trips has increased in distance the last......, the effectiveness of the network is of importance aiming at satisfying as many costumer demands as possible at a low cost. Routing represent a path between locations such as an origin and destination for the object routed. Sometimes routing has a time dimension as well as the physical paths. This may...... to a destination on a predefined network, the routing and scheduling of vessels in a liner shipping network given a demand forecast to be covered, the routing of manpower and vehicles transporting disabled passengers in an airport and the vehicle routing with time windows where one version studied includes edge...

  9. 28 CFR 91.22 - Definitions.

    Science.gov (United States)

    2010-07-01

    ... Tribal Lands § 91.22 Definitions. (a) The Act means the Violent Crime Control and Law Enforcement Act of..., construction management, or project management costs. Construction does not include the purchase of land....

  10. Visually Exploring Transportation Schedules.

    Science.gov (United States)

    Palomo, Cesar; Guo, Zhan; Silva, Cláudio T; Freire, Juliana

    2016-01-01

    Public transportation schedules are designed by agencies to optimize service quality under multiple constraints. However, real service usually deviates from the plan. Therefore, transportation analysts need to identify, compare and explain both eventual and systemic performance issues that must be addressed so that better timetables can be created. The purely statistical tools commonly used by analysts pose many difficulties due to the large number of attributes at trip- and station-level for planned and real service. Also challenging is the need for models at multiple scales to search for patterns at different times and stations, since analysts do not know exactly where or when relevant patterns might emerge and need to compute statistical summaries for multiple attributes at different granularities. To aid in this analysis, we worked in close collaboration with a transportation expert to design TR-EX, a visual exploration tool developed to identify, inspect and compare spatio-temporal patterns for planned and real transportation service. TR-EX combines two new visual encodings inspired by Marey's Train Schedule: Trips Explorer for trip-level analysis of frequency, deviation and speed; and Stops Explorer for station-level study of delay, wait time, reliability and performance deficiencies such as bunching. To tackle overplotting and to provide a robust representation for a large numbers of trips and stops at multiple scales, the system supports variable kernel bandwidths to achieve the level of detail required by users for different tasks. We justify our design decisions based on specific analysis needs of transportation analysts. We provide anecdotal evidence of the efficacy of TR-EX through a series of case studies that explore NYC subway service, which illustrate how TR-EX can be used to confirm hypotheses and derive new insights through visual exploration.

  11. 7 CFR 1942.126 - Planning, bidding, contracting, constructing, procuring.

    Science.gov (United States)

    2010-01-01

    ...) Preconstruction conference. Prior to beginning construction the owner will schedule a preconstruction conference... with the construction schedule established for the period. The partial payment estimate may be used for... engineering report conforming with customary professional standards is required for all construction,...

  12. Bringing Definitions into High Definition

    Science.gov (United States)

    Mason, John

    2010-01-01

    Why do definitions play such a central role in mathematics? It may seem obvious that precision about the terms one uses is necessary in order to use those terms reasonably (while reasoning). Definitions are chosen so as to be definite about the terms one uses, but also to make both the statement of, and the reasoning to justify, theorems as…

  13. Belle II Physics Prospects, Status and Schedule

    Science.gov (United States)

    Bennett, J.

    2016-11-01

    The second generation B-factory at the SuperKEKB facility in Tsukuba, Japan is beginning to take shape. The highly anticipated Belle II experiment will have a rich physics program at the intensity frontier, in complement to existing experiments in the energy frontier. Accelerator commissioning has been making good progress, as has the construction and installation of the Belle II detector. An overview of the physics prospects at Belle II, as well as the status and schedule of the experiment, is presented.

  14. A GRASP for Next Generation Sapphire Image Acquisition Scheduling

    Directory of Open Access Journals (Sweden)

    Yang Wang

    2016-01-01

    Full Text Available This paper investigates an image acquisition scheduling problem for a Canadian surveillance-of-space satellite named Sapphire that takes images of deep space Earth-orbiting objects. For a set of resident space objects (RSOs that needs to be imaged within the time horizon of one day, the Sapphire image acquisition scheduling (SIAS problem is to find a schedule that maximizes the “Figure of Merit” of all the scheduled RSO images. To address the problem, we propose an effective GRASP heuristic that alternates between a randomized greedy constructive procedure and a local search procedure. Experimental comparisons with the currently used greedy algorithm are presented to demonstrate the merit of the proposed algorithm in handling the SIAS problem.

  15. An Automatic Course Scheduling Approach Using Instructors' Preferences

    Directory of Open Access Journals (Sweden)

    Hossam Faris

    2012-03-01

    Full Text Available University Courses Timetabling problem has been extensively researched in the last decade. Therefore, numerous approaches were proposed to solve UCT problem. This paper proposes a new approach to process a sequence of meetings between instructors, rooms, and students in predefined periods of time with satisfying a set of constraints divided in variety of types. In addition, this paper proposes new representation for courses timetabling and conflict-free for each time slot by mining instructor preferences from previous schedules to avoid undesirable times for instructors. Experiments on different real data showed the approach achieved increased satisfaction degree for each instructor and gives feasible schedule with satisfying all hard constraints in construction operation. The generated schedules have high satisfaction degrees comparing with schedules created manually. The research conducts experiments on collected data gathered from the computer science department and other related departments in Jordan University of Science and Technology- Jordan.

  16. Aircraft nonlinear optimal control using fuzzy gain scheduling

    Science.gov (United States)

    Nusyirwan, I. F.; Kung, Z. Y.

    2016-10-01

    Fuzzy gain scheduling is a common solution for nonlinear flight control. The highly nonlinear region of flight dynamics is determined throughout the examination of eigenvalues and the irregular pattern of root locus plots that show the nonlinear characteristic. By using the optimal control for command tracking, the pitch rate stability augmented system is constructed and the longitudinal flight control system is established. The outputs of optimal control for 21 linear systems are fed into the fuzzy gain scheduler. This research explores the capability in using both optimal control and fuzzy gain scheduling to improve the efficiency in finding the optimal control gains and to achieve Level 1 flying qualities. The numerical simulation work is carried out to determine the effectiveness and performance of the entire flight control system. The simulation results show that the fuzzy gain scheduling technique is able to perform in real time to find near optimal control law in various flying conditions.

  17. Dynamic Extra Buses Scheduling Strategy in Public Transport

    Directory of Open Access Journals (Sweden)

    Bin Yu

    2015-06-01

    Full Text Available This paper presents a dynamic extra buses scheduling strategy to improve the transit service of transit routes. In this strategy, in order to decide when to dispatch an extra bus, the service reliability of transit route is assessed firstly. A model aimed at maximizing the benefit of the extra buses scheduling strategy is constructed to determine how many stops extra buses need to skip from the terminal to accommodate passengers at the following stops. A heuristic algorithm is defined and implemented to estimate the service reliability of transit route and to optimize the initial stop of extra buses scheduling strategy. Finally, the strategy is tested on two examples: a simple and a real-life transit route in the Dalian city in China. The results show that the extra buses scheduling strategy based on terminal stops with a reasonable threshold can save 8.01% waiting time of passengers.

  18. Modeling of Agile Intelligent Manufacturing-oriented Production Scheduling System

    Institute of Scientific and Technical Information of China (English)

    Zhong-Qi Sheng; Chang-Ping Tang; Ci-Xing Lv

    2010-01-01

    Agile intelligent manufacturing is one of the new manufacturing paradigms that adapt to the fierce globalizing market competition and meet the survival needs of the enterprises, in which the management and control of the production system have surpassed the scope of individual enterprise and embodied some new features including complexity, dynamicity, distributivity, and compatibility. The agile intelligent manufacturing paradigm calls for a production scheduling system that can support the cooperation among various production sectors, the distribution of various resources to achieve rational organization, scheduling and management of production activities. This paper uses multi-agents technology to build an agile intelligent manufacturing-oriented production scheduling system. Using the hybrid modeling method, the resources and functions of production system are encapsulated, and the agent-based production system model is established. A production scheduling-oriented multi-agents architecture is constructed and a multi-agents reference model is given in this paper.

  19. The Definition,Characteristics and Its Construction of Innovation Ecosystem%创新生态系统的界定、特征及其构建

    Institute of Scientific and Technical Information of China (English)

    杨荣

    2014-01-01

    Since the concept of innovation ecosystem has been put forward, the idea of innovation ecosystem gained popularity and application quickly in the world, causing widespread concern in academic circles, and there have been a considerable number of scholars into the field of research.In accordance with the general logic relations, in the research of innovation ecosystem theory, it is necessary to get to know the background of the concept of innovation ecosystem first, secondly the definition of the concept, then the characteristics, and then the model of innovation ecosystem.These are the basic content of the innovation ecosystem theory, which became an important foundation for the in-depth research of innovation ecosystem theory.%自从创新生态系统概念被提出后,创新生态系统理念迅速在全球得到普及和应用,由此引起了学界的广泛关注,相继有相当多的学者投入到该领域的研究中。按照一般的逻辑关系,研究创新生态系统理论,首先要了解创新生态系统概念产生的背景,其次要对该概念的进行界定,接着要了解创新生态系统的特征表现,再接着要探讨创新生态系统的模型构建,即系统的结构及其组成要素。这些内容均是创新生态系统理论需要研究的基本内容,它成为深入研究创新生态系统其它理论的重要基础。

  20. The Effectiveness of Block Scheduling.

    Science.gov (United States)

    Creamean, Sharon Lightle; Horvath, Robert Jeffery

    This report describes a program for the exploration of block scheduling. The targeted population consists of high school students in a growing, middle-class community, located in a suburban setting of a large mid-western city. The historical background of block scheduling is documented through data gathered using attendance reports, student…

  1. Nontraditional work schedules for pharmacists.

    Science.gov (United States)

    Mahaney, Lynnae; Sanborn, Michael; Alexander, Emily

    2008-11-15

    Nontraditional work schedules for pharmacists at three institutions are described. The demand for pharmacists and health care in general continues to increase, yet significant material changes are occurring in the pharmacy work force. These changing demographics, coupled with historical vacancy rates and turnover trends for pharmacy staff, require an increased emphasis on workplace changes that can improve staff recruitment and retention. At William S. Middleton Memorial Veterans Affairs Hospital in Madison, Wisconsin, creative pharmacist work schedules and roles are now mainstays to the recruitment and retention of staff. The major challenge that such scheduling presents is the 8 hours needed to prepare a six-week schedule. Baylor Medical Center at Grapevine in Dallas, Texas, has a total of 45 pharmacy employees, and slightly less than half of the 24.5 full-time-equivalent staff work full-time, with most preferring to work one, two, or three days per week. As long as the coverage needs of the facility are met, Envision Telepharmacy in Alpine, Texas, allows almost any scheduling arrangement preferred by individual pharmacists or the pharmacist group covering the facility. Staffing involves a great variety of shift lengths and intervals, with shifts ranging from 2 to 10 hours. Pharmacy leaders must be increasingly aware of opportunities to provide staff with unique scheduling and operational enhancements that can provide for a better work-life balance. Compressed workweeks, job-sharing, and team scheduling were the most common types of alternative work schedules implemented at three different institutions.

  2. Research on the Potential of High Potential Employees Construct Definition and Scale Development%高潜力员工的潜力研究--构念界定与量表开发

    Institute of Scientific and Technical Information of China (English)

    王文卓; 孙遇春; 孙秀明

    2016-01-01

    员工的潜力日益成为组织人才选拔与发展的重要因素之一,但其构念界定与测量并不完善。结合质性与量化的研究方法对高潜力员工所具有的潜力的构念进行界定、诠释其维度内涵并开发潜力的测量量表,得出高潜力员工的潜力是由动机、能力、品质三个维度构成的合并型多维构念的研究结论。通过实证研究检验了量表的信度和效度,验证了潜力各维度的内在结构,建立了潜力与三个维度之间的线性函数来测量员工的整体潜力程度。%Employee potential has increasingly become one of the most important factors in talent selection and development, but its construct definition and measurement require improving.By combining qualitative and quantitative research methods,the potential construct of high potential employees was defined, the dimension connotations were interpreted and the measurement scale was developed accordingly.It was concluded that the potential of high potential employees is an aggregate multi-dimensional construct (AMC),which includes such dimensions as motivation,ability and trait.The empirical study showed that its three subscales have good validity and reliability,verified the inner structure of each dimension, and established a linear function between the potential and its three dimensions to measure employees’overall potential.

  3. Semi-Online Scheduling with Machine Cost

    Institute of Scientific and Technical Information of China (English)

    何勇; 蔡圣义

    2002-01-01

    For most scheduling problems the set of machines is fixed initially and remainsunchanged for the duration of the problem. Recently Imreh and Nogaproposed to add theconcept of machine cost to scheduling problems and considered the so-called List Model problem.An online algorithm with a competitive ratio 1.618 was given while the lower bound is 4/3. Inthis paper, two different semi-online versions of this problem are studied. In the first case, it isassumed that the processing time of the largest job is known a priori. A semi-online algorithmis presented with the competitive ratio at most 1.5309 while the lower bound is 4/3. In thesecond case, it is assumed that the total processing time of all jobs is known in advance. Asemi-online algorithm is presented with the competitive ratio at most 1.414 while the lowerbound is 1.161. It is shown that the additional partial available information about the jobsleads to the possibility of constructing a schedule with a smaller competitive ratio than that ofonline algorithms.

  4. Astronaut Office Scheduling System Software

    Science.gov (United States)

    Brown, Estevancio

    2010-01-01

    AOSS is a highly efficient scheduling application that uses various tools to schedule astronauts weekly appointment information. This program represents an integration of many technologies into a single application to facilitate schedule sharing and management. It is a Windows-based application developed in Visual Basic. Because the NASA standard office automation load environment is Microsoft-based, Visual Basic provides AO SS developers with the ability to interact with Windows collaboration components by accessing objects models from applications like Outlook and Excel. This also gives developers the ability to create newly customizable components that perform specialized tasks pertaining to scheduling reporting inside the application. With this capability, AOSS can perform various asynchronous tasks, such as gathering/ sending/ managing astronauts schedule information directly to their Outlook calendars at any time.

  5. Definitely Life but not Definitively

    Science.gov (United States)

    Oliver, Joan D.; Perry, Randall S.

    2006-12-01

    Although there have been attempts at a definition of life from many disciplines, none is accepted by all as definitive. Some people believe that it is impossible to define ‘life’ adequately at the moment. We agree with this point of view on linguistic grounds, examining the different types of definition, the contexts in which they are used and their relative usefulness as aids to arriving at a scientific definition of life. We look at some of the more recent definitions and analyse them in the light of our criteria for a good definition. We argue that since there are so many linguistic and philosophical difficulties with such a definition of life, what is needed is a series of working descriptions, which are suited to the audience and context in which they are used and useful for the intended purpose. We provide some ideas and examples of the forms these may take.

  6. Nurse Scheduling System based on Dynamic Weighted Maximal Constraint Satisfaction Problem

    Science.gov (United States)

    Hattori, Hiromitsu; Isomura, Atsushi; Ito, Takayuki; Ozono, Tadachika; Shintani, Toramatsu

    Scheduling has been an important research field in Artificial Intelligence. Because typical scheduling problems could be modeled as a Constraint Satisfaction Problem(CSP), several constraint satisfaction techniques have been proposed. In order to handle the different levels of importance of the constraints, solving a problem as a Weighted Maximal Constraint Satisfaction Problem(W-MaxCSP) is an promising approach. However, there exists the case where unexpected events are added and some sudden changes are required, i.e., the case with dynamic changes in scheduling problems. In this paper, we describe such dynamic scheduling problem as a Dynamic Weighted Maximal Constraint Satisfaction Problem(DW-MaxCSP) in which constraints would changes dynamically. Generally, it is undesirable to determine vastly modified schedule even if re-scheduling is needed. A new schedule should be close to the current one as much as possible. In order to obtain stable solutions, we propose the methodology to maintain portions of the current schedule using the provisional soft constraints, which explicitly penalize the changes from the current schedule. We have experimentally confirmed the efficacy of re-scheduling based on our method with provisional constraints. In this paper, we construct the nurse scheduling system for applying the proposed scheduling method.

  7. The GBT Dynamic Scheduling System: A New Scheduling Paradigm

    Science.gov (United States)

    O'Neil, K.; Balser, D.; Bignell, C.; Clark, M.; Condon, J.; McCarty, M.; Marganian, P.; Shelton, A.; Braatz, J.; Harnett, J.; Maddalena, R.; Mello, M.; Sessoms, E.

    2009-09-01

    The Robert C. Byrd Green Bank Telescope (GBT) is implementing a new Dynamic Scheduling System (DSS) designed to maximize the observing efficiency of the telescope while ensuring that none of the flexibility and ease of use of the GBT is harmed and that the data quality of observations is not adversely affected. To accomplish this, the GBT DSS is implementing a dynamic scheduling system which schedules observers, rather than running scripts. The DSS works by breaking each project into one or more sessions which have associated observing criteria such as RA, Dec, and frequency. Potential observers may also enter dates when members of their team will not be available for either on-site or remote observing. The scheduling algorithm uses those data, along with the predicted weather, to determine the most efficient schedule for the GBT. The DSS provides all observers at least 24 hours notice of their upcoming observing. In the uncommon (DSS project, including the ranking and scheduling algorithms for the sessions, the scheduling probabilities generation, the web framework for the system, and an overview of the results from the beta testing which were held from June - September, 2008.

  8. TECHNICAL COORDINATION SCHEDULE & INTEGRATION

    CERN Multimedia

    W. Zeuner

    Introduction The endgame of CMS installation in the underground cavern is in full swing, with several major milestones having been passed since the last CMS week. The Tracker was installed inside the Vactank just before the CERN end-of-year shutdown. Shortly after the reopening in 2008, the two remaining endcap disks, YE-2 and YE-1, were lowered, marking the completion of eight years of assembly in the surface building SX5. The remaining tasks, before the detector can be closed for the Cosmic Run At Four Tesla (CRAFT), are the installation of the thermal shields, the cabling of the negative endcap, the cabling of the tracker and the beam pipe installation. In addition to these installation tasks, a test closure of the positive endcap is planned just before the installation of the central beam pipe. The schedule is tight and complicated but the goal to close CMS by the end of May for a cosmic test with magnetic field remains feasible. Safety With all large components now being underground, the shortage...

  9. Bulletin publication schedule

    CERN Multimedia

    Publications Section, DG-CO Group

    2011-01-01

    The final edition (Nos 51-52/2011 and 1-2-3/2012) of the Bulletin this year will be published on Friday 16 December and will cover events at CERN from 19 December 2011 to 19 January 2012. Announcements for publication in this issue should reach the Communication Group or the Staff Association, as appropriate, by noon on Tuesday 13 December. Bulletin publication schedule for 2012 The table below lists the 2012 publication dates for the paper version of the Bulletin and the corresponding deadlines for the submission of announcements. Please note that all announcements must be submitted by 12.00 noon on Tuesdays at the latest.   Bulletin No. Week number Submission of announcements (before 12.00 midday) Bulletin Web version Bulletin Printed version 4-5   Tuesday 17 January Fridays 20 and 27 January Wednesday25 January 6-7   Tuesday 31 January Fridays 3 and 10 February Wednesday 8 February 8-9 Tuesday 14 February Fridays 17 and 24 february Wednesday 22 Februa...

  10. 空肠弯曲菌DNA疫苗构建及其疫苗免疫程序研究%Construction of the Campylobacter jejuni DNA vaccine and investigation of its immunization schedule

    Institute of Scientific and Technical Information of China (English)

    杜联峰; 余妍; 徐岗村; 孙万邦; 王宜峰; 王胜香; 罗军敏; 姚新生; 夏嫱; 杨瑞

    2012-01-01

    Objective:To construct eukaryotic expression vector carrying Campylobacter jejuni peblA gene and express peblA protein in COS-7, then explore the immunogenicity of the different immunization program of CJ pcDNA3. l(-)-peblA. Methods:The PET28a( + ) -peblA as a template, peblA gene was amplified by PCR. Target gene and eukaryotic expression plasmid pcDNA3. l(-) were digested by Hindi and EcoR I respectively, and then purified by DNA Extraction Kit. The plasmid of pcDNA3. 1 (-) -peblA was extracted and transfected into COS-7 cells with jetPEITM reagent. The recombinant protein was identified with Western blot. Healthy male KM mice were divided into experimental groups and control groups. The former contained naked pcDNA3. l(-)-peblA vaccine group. The latter included the pcDNA3.1(-)(100μg/100μl) control group and normal saline(NS) control group. The levels of IgM and IgG in serum of each Kunming mice in pcDNA3. 1(-) -peblA vaccine group were detected with indirect EOS A. Results; Analyzed by restriction enzyme digestion, PCR and DNA sequencing, recombinant plasmid pcDNA3. 1(-)-peblA was correctly constructed. The recombinant plasmid had been successfully transfected into COS-7 cells, and the PEB1 protein was expressed, checked by Western blot. The level of serum IgG antibody was significantly increased in mice immunized with recombinant pcDNA3. 1 (-) -pebl A compared with the two control groups (P<0.05). Conclusion:The recombinant pcDNA3. 1 (-)-peblA has been successfully constructed and the PEB1 protein was successfully expressed in mammalian COS-7 cells. The recombinant pcDNA3. 1(-)-peblA had good immunogenicity via intramuscular injection immunize mice. Short time immunization is better than long time immunization.%目的:构建空肠弯曲菌peb1A基因真核表达载体,探讨DNA疫苗不同免疫程序的免疫效果.方法:以重组pET28a(+)-peb1A质粒为模板,将空肠弯曲菌peb1A基因克隆入真核表达载体pcDNA3.1(-),经酶切和测序鉴

  11. Gain scheduling using the Youla parameterization

    DEFF Research Database (Denmark)

    Niemann, Hans Henrik; Stoustrup, Jakob

    1999-01-01

    Gain scheduling controllers are considered in this paper. The gain scheduling problem where the scheduling parameter vector cannot be measured directly, but needs to be estimated is considered. An estimation of the scheduling vector has been derived by using the Youla parameterization. The use...... in connection with H_inf gain scheduling controllers....

  12. Construction in Occupied Spaces

    Directory of Open Access Journals (Sweden)

    Ward Andrew E.

    2017-06-01

    Full Text Available Conducting construction activities in occupied environments presents a great challenge due to the additional logistical requirements and the presence of the building occupants. The aim of this research is to gather and evaluate the means and methods to successfully plan, manage, and execute construction activities in occupied spaces in an effort to provide consolidated industry tools and strategies for maintaining a schedule and minimizing the impact on the occupants. The methodology of the research utilizes an exploratory approach to gather qualitative data. The data was collected through interviews with industry professionals to identify industry best practices. The semi-structured interviews provided a platform for the documents, lessons learned, and the techniques and strategies used for occupied construction by the construction industry. The information obtained in the interview process identified six themes that are critical to achieving and maintaining quality in occupied construction. These themes of the schedule, cost, customer satisfaction, planning, fire/life safety and utilities, and contractor management are reviewed in detail, and the paper discusses how to manage each element. The analysis and extracted management techniques, procedures and strategies can be used by the construction industry for future projects by focusing on the critical aspects of occupied construction and the manner in which to succeed with it.

  13. Construction in Occupied Spaces

    Science.gov (United States)

    Ward, Andrew E.; Azhar, Salman; Khalfan, Malik

    2017-06-01

    Conducting construction activities in occupied environments presents a great challenge due to the additional logistical requirements and the presence of the building occupants. The aim of this research is to gather and evaluate the means and methods to successfully plan, manage, and execute construction activities in occupied spaces in an effort to provide consolidated industry tools and strategies for maintaining a schedule and minimizing the impact on the occupants. The methodology of the research utilizes an exploratory approach to gather qualitative data. The data was collected through interviews with industry professionals to identify industry best practices. The semi-structured interviews provided a platform for the documents, lessons learned, and the techniques and strategies used for occupied construction by the construction industry. The information obtained in the interview process identified six themes that are critical to achieving and maintaining quality in occupied construction. These themes of the schedule, cost, customer satisfaction, planning, fire/life safety and utilities, and contractor management are reviewed in detail, and the paper discusses how to manage each element. The analysis and extracted management techniques, procedures and strategies can be used by the construction industry for future projects by focusing on the critical aspects of occupied construction and the manner in which to succeed with it.

  14. Effects of resource management regimes on project schedule

    NARCIS (Netherlands)

    Al-Jibouri, Saad H.

    2002-01-01

    This paper deals with the problem of resource scheduling within given resource constraints on a sectionalised construction project. A computer model has been developed which realistically simulates the progress of projects. A project has been selected and divided into sections whereby section manage

  15. Scheduling technicians and tasks in a telecommunications company

    DEFF Research Database (Denmark)

    Cordeau, J. F.; Laporte, G.; Pasin, F.

    2010-01-01

    This paper proposes a construction heuristic and an adaptive large neighborhood search heuristic for the technician and task scheduling problem arising in a large telecommunications company. This problem was solved within the framework of the 2007 challenge set up by the French Operational Research...

  16. Effects of resource management regimes on project schedule

    NARCIS (Netherlands)

    Al-Jibouri, Saad H.S.

    2002-01-01

    This paper deals with the problem of resource scheduling within given resource constraints on a sectionalised construction project. A computer model has been developed which realistically simulates the progress of projects. A project has been selected and divided into sections whereby section

  17. Optimal Deadline Scheduling with Commitment

    CERN Document Server

    Chen, Shiyao; He, Ting

    2011-01-01

    We consider an online preemptive scheduling problem where jobs with deadlines arrive sporadically. A commitment requirement is imposed such that the scheduler has to either accept or decline a job immediately upon arrival. The scheduler's decision to accept an arriving job constitutes a contract with the customer; if the accepted job is not completed by its deadline as promised, the scheduler loses the value of the corresponding job and has to pay an additional penalty depending on the amount of unfinished workload. The objective of the online scheduler is to maximize the overall profit, i.e., the total value of the admitted jobs completed before their deadlines less the penalty paid for the admitted jobs that miss their deadlines. We show that the maximum competitive ratio is $3-2\\sqrt{2}$ and propose a simple online algorithm to achieve this competitive ratio. The optimal scheduling includes a threshold admission and a greedy scheduling policies. The proposed algorithm has direct applications to the chargin...

  18. Scheduling the Belgian soccer league.

    OpenAIRE

    Goossens, Dries; Spieksma, Frederik

    2009-01-01

    Any sports league needs a schedule of play, and such a schedule can be important, as it may influence the outcome of the sports competition itself and since it may have an impact on the interests of all parties involved. As in many other sports leagues and countries, the interest for Belgian soccer has increased over the last years. This paper describes our experiences in scheduling the highest Belgian soccer league. We describe how we automated and improved the way in which the calendar is ...

  19. An empirical investigation of scheduling performance criteria

    NARCIS (Netherlands)

    de Snoo, C.; van Wezel, W.M.C.; Jorna, R.J.J.M.

    Planning and scheduling significantly influence organizational performance, but literature that pays attention to how organizations could or should organize and assess their planning processes is limited. We extend planning and scheduling theory with a categorization of scheduling performance

  20. When greediness fails: examples from stochastic scheduling

    NARCIS (Netherlands)

    Uetz, Marc Jochen

    The purpose of this paper is to present examples for the sometimes surprisingly different behavior of deterministic and stochastic scheduling problems. In particular, it demonstrates some seemingly counterintuitive properties of optimal scheduling policies for stochastic machine scheduling problems.

  1. When greediness fails: examples from stochastic scheduling

    NARCIS (Netherlands)

    Uetz, Marc

    2003-01-01

    The purpose of this paper is to present examples for the sometimes surprisingly different behavior of deterministic and stochastic scheduling problems. In particular, it demonstrates some seemingly counterintuitive properties of optimal scheduling policies for stochastic machine scheduling problems.

  2. An Analysis of Robust Workforce Scheduling Models for a Nurse Rostering Problem

    Science.gov (United States)

    2007-03-01

    12 Moz and Pato ...problem and the nurse rerostering problem. The nurse rostering problem has received much attention in the staff scheduling literature (Moz and Pato , 2007...Most recently, Moz and Pato (2007) developed constructive heuristics and genetic algorithms to re-roster a schedule following a disruption. Their use

  3. Multiagent scheduling models and algorithms

    CERN Document Server

    Agnetis, Alessandro; Gawiejnowicz, Stanisław; Pacciarelli, Dario; Soukhal, Ameur

    2014-01-01

    This book presents multi-agent scheduling models in which subsets of jobs sharing the same resources are evaluated by different criteria. It discusses complexity results, approximation schemes, heuristics and exact algorithms.

  4. Executive Schedule C System (ESCS)

    Data.gov (United States)

    Office of Personnel Management — Used to store information on Federal employees in the Senior Executive Service (SES) and appointed employees in the Schedule C System. Every four years, just after...

  5. The GBT Dynamic Scheduling System

    Science.gov (United States)

    McCarty, M. T.; Balser, D. S.; Braatz, J.; Clark, M. H.; Condon, J.; Creager, R. E.; Maddalena, R. J.; Marganian, P.; O'Neil, K.; Sessoms, E.; Shelton, A. L.

    2012-09-01

    The Robert C. Byrd Green Bank Telescope (GBT) Dynamic Scheduling System (DSS), in use since September, 2009, was designed to maximize observing efficiency while preserving telescope flexibility and data quality without creating undue adversity for the observers. Using observing criteria; observer availability and qualifications for remote observing; three-dimensional weather forecasts; and telescope state, the DSS software optimally schedules observers 24 to 48 hours in advance for a telescope that has a wide-range of capabilities and a geographical location with variable weather patterns. The DSS project was closed October 28, 2011 and will now enter a continuing maintenance and enhancement phase. Recent improvements include a new resource calendar for incorporating telescope maintenance activities, a sensitivity calculator that leverages the scheduling algorithms to facilitate consistent tools for proposal preparation, improved support for monitoring observations, scheduling of high frequency continuum and spectral line observations for both sparse and fully sampled array receivers, and additional session parameters for observations having special requirements.

  6. Schedule Sales Query Raw Data

    Data.gov (United States)

    General Services Administration — Schedule Sales Query presents sales volume figures as reported to GSA by contractors. The reports are generated as quarterly reports for the current year and the...

  7. Optimized Information Transmission Scheduling Strategy Oriented to Advanced Metering Infrastructure

    Directory of Open Access Journals (Sweden)

    Weiming Tong

    2013-01-01

    Full Text Available Advanced metering infrastructure (AMI is considered to be the first step in constructing smart grid. AMI allows customers to make real-time choices about power utilization and enables power utilities to increase the effectiveness of the regional power grids by managing demand load during peak times and reducing unneeded power generation. These initiatives rely heavily on the prompt information transmission inside AMI. Aiming at the information transmission problem, this paper researches the communication scheduling strategy in AMI at a macroscopic view. First, the information flow of AMI is analyzed, and the power users are classified into several grades by their importance. Then, the defect of conventional information transmission scheduling strategy is analyzed. On this basis, two optimized scheduling strategies are proposed. In the wide area, an optimized scheduling strategy based on user importance and time critical is proposed to guarantee the important power users’ information transmission being handled promptly. In the local area, an optimized scheduling strategy based on device and information importance and time critical is proposed to guarantee the important devices and information in AMI user end system being handled promptly. At last, the two optimized scheduling strategies are simulated. The simulation results show that they can effectively improve the real-time performance and reliability of AMI information transmission.

  8. 12 CFR 347.302 - Definitions.

    Science.gov (United States)

    2010-01-01

    ... processing loan documents; and an allocable portion of salaries and related benefits of employees engaged in... interest or extend the schedule of payments; or (ii) A new loan is made to, or for the benefit of, the... 12 Banks and Banking 4 2010-01-01 2010-01-01 false Definitions. 347.302 Section 347.302 Banks...

  9. 18 CFR 292.101 - Definitions.

    Science.gov (United States)

    2010-04-01

    ... unscheduled outage of the facility. (10) Interruptible power means electric energy or capacity supplied by an...) Maintenance power means electric energy or capacity supplied by an electric utility during scheduled outages... 18 Conservation of Power and Water Resources 1 2010-04-01 2010-04-01 false Definitions....

  10. 14 CFR 291.2 - Definitions.

    Science.gov (United States)

    2010-01-01

    ... 14 Aeronautics and Space 4 2010-01-01 2010-01-01 false Definitions. 291.2 Section 291.2 Aeronautics and Space OFFICE OF THE SECRETARY, DEPARTMENT OF TRANSPORTATION (AVIATION PROCEEDINGS) ECONOMIC... schedule be published in the Official Airline Guide. Wet-Lease Agreement means an agreement under which one...

  11. 5 CFR 430.203 - Definitions.

    Science.gov (United States)

    2010-01-01

    ... Performance Appraisal for General Schedule, Prevailing Rate, and Certain Other Employees § 430.203 Definitions... plans, and other means of expressing expected performance. Appraisal means the process under which performance is reviewed and evaluated. Appraisal period means the established period of time for...

  12. 14 CFR 255.3 - Definitions.

    Science.gov (United States)

    2010-01-01

    ... REGULATIONS AIRLINE COMPUTER RESERVATIONS SYSTEMS § 255.3 Definitions. Availability means information provided... presentation of carrier schedules, fares, rules or availability to a subscriber by means of a computer terminal... reflects the monthly on-time performance history of a nonstop flight or one-stop or multi-stop single...

  13. Welcoming high reliability organising in construction management

    NARCIS (Netherlands)

    olde Scholtenhuis, Léon Luc; Doree, Andries G.; Smith, S.D.; Ahiaga-Dagbui, D.D.

    2013-01-01

    To achieve project objectives, construction project managers have to manoeuvre through complex coordination structures. They have to simultaneously deal with limited budgets, tight schedules, demanding stakeholders and a fragmented supply-chain. Despite their extensive coordination efforts, project

  14. Neuroretinitis -- definition

    Science.gov (United States)

    ... page: //medlineplus.gov/ency/article/007624.htm Neuroretinitis - definition To use the sharing features on this page, ... this important distinction for online health information and services. Learn more about A.D.A.M.'s editorial ...

  15. An Improved Round Robin Scheduling Algorithm for CPU scheduling

    Directory of Open Access Journals (Sweden)

    Rakesh Kumar yadav

    2010-07-01

    Full Text Available There are many functions which are provided by operating system like process management, memory management, file management, input/outputmanagement, networking, protection system and command interpreter system. In these functions, the process management is most important function because operating system is a system program that means at the runtime process interact with hardware. Therefore, we can say that for improving the efficiency of a CPU we need to manage all process. For managing the process we use various types scheduling algorithm. There are many algorithm are available for CPU scheduling. But all algorithms have its own deficiency and limitations. In this paper, I proposed a new approach for round robin scheduling algorithm which helps to improve the efficiency of CPU.

  16. An Optimized Round Robin Scheduling Algorithm for CPU Scheduling

    Directory of Open Access Journals (Sweden)

    Ajit Singh

    2010-10-01

    Full Text Available The main objective of this paper is to develop a new approach for round robin scheduling which help to improve the CPU efficiency in real time and time sharing operating system. There are many algorithms available for CPU scheduling. But we cannot implemented in real time operating system because of high context switch rates, large waiting time, large response time, large trn around time and less throughput. The proposed algorithm improves all the drawback of simple round robin architecture. The author have also given comparative analysis of proposed with simple round robin scheduling algorithm. Therefore, the author strongly feel that the proposed architecture solves all the problem encountered in simple round robin architecture by decreasing the performance parameters to desirable extent and thereby increasing the system throughput.

  17. Market Definition

    OpenAIRE

    Kaplow, Louis

    2014-01-01

    Market definition has long held a central place in competition law. This entry surveys recent analytical work that has called the market definition paradigm into question on a number of fronts: whether the process is feasible, whether market share threshold tests are coherent, whether the hypothetical monopolist test in merger guidelines is counterproductive, and whether and when the frequent focus on cross-elasticities is useful.

  18. Flexible job-shop scheduling based on genetic algorithm and simulation validation

    Directory of Open Access Journals (Sweden)

    Zhou Erming

    2017-01-01

    Full Text Available This paper selects flexible job-shop scheduling problem as the research object, and Constructs mathematical model aimed at minimizing the maximum makespan. Taking the transmission reverse gear production line of a transmission corporation as an example, genetic algorithm is applied for flexible jobshop scheduling problem to get the specific optimal scheduling results with MATLAB. DELMIA/QUEST based on 3D discrete event simulation is applied to construct the physical model of the production workshop. On the basis of the optimal scheduling results, the logical link of the physical model for the production workshop is established, besides, importing the appropriate process parameters to make virtual simulation on the production workshop. Finally, through analyzing the simulated results, it shows that the scheduling results are effective and reasonable.

  19. 75 FR 39629 - FOIA Fee Schedule Update

    Science.gov (United States)

    2010-07-12

    ... 1703 FOIA Fee Schedule Update AGENCY: Defense Nuclear Facilities Safety Board. ACTION: Establishment of... Information Act (FOIA) Fee Schedule Update pursuant to 10 CFR 1703.107(b)(6) of the Board's regulations. DATES... update the FOIA Fee Schedule once every 12 months. The previous Fee Schedule Update was published in...

  20. 76 FR 43819 - FOIA Fee Schedule Update

    Science.gov (United States)

    2011-07-22

    ... SAFETY BOARD 10 CFR Part 1703 FOIA Fee Schedule Update AGENCY: Defense Nuclear Facilities Safety Board... publishing its Freedom of Information Act (FOIA) Fee Schedule Update pursuant to the Board's regulations... General Manager will update the FOIA Fee Schedule once every 12 months. The previous Fee Schedule...

  1. Gain scheduling using the youla parameterization

    DEFF Research Database (Denmark)

    Niemann, H.H.; Stoustrup, Jakob

    1999-01-01

    Gain scheduling controllers are considered in this paper. The gain scheduling problem where the scheduling parameter vector theta cannot be measured directly, but needs to be estimated is considered. An estimation of the scheduling vector theta has been derived by using the Youla parameterization...

  2. Multiuser switched diversity scheduling schemes

    KAUST Repository

    Shaqfeh, Mohammad

    2012-09-01

    Multiuser switched-diversity scheduling schemes were recently proposed in order to overcome the heavy feedback requirements of conventional opportunistic scheduling schemes by applying a threshold-based, distributed, and ordered scheduling mechanism. The main idea behind these schemes is that slight reduction in the prospected multiuser diversity gains is an acceptable trade-off for great savings in terms of required channel-state-information feedback messages. In this work, we characterize the achievable rate region of multiuser switched diversity systems and compare it with the rate region of full feedback multiuser diversity systems. We propose also a novel proportional fair multiuser switched-based scheduling scheme and we demonstrate that it can be optimized using a practical and distributed method to obtain the feedback thresholds. We finally demonstrate by numerical examples that switched-diversity scheduling schemes operate within 0.3 bits/sec/Hz from the ultimate network capacity of full feedback systems in Rayleigh fading conditions. © 2012 IEEE.

  3. Nurse Scheduling Using Genetic Algorithm

    Directory of Open Access Journals (Sweden)

    Komgrit Leksakul

    2014-01-01

    Full Text Available This study applied engineering techniques to develop a nurse scheduling model that, while maintaining the highest level of service, simultaneously minimized hospital-staffing costs and equitably distributed overtime pay. In the mathematical model, the objective function was the sum of the overtime payment to all nurses and the standard deviation of the total overtime payment that each nurse received. Input data distributions were analyzed in order to formulate a simulation model to determine the optimal demand for nurses that met the hospital’s service standards. To obtain the optimal nurse schedule with the number of nurses acquired from the simulation model, we proposed a genetic algorithm (GA with two-point crossover and random mutation. After running the algorithm, we compared the expenses and number of nurses between the existing and our proposed nurse schedules. For January 2013, the nurse schedule obtained by GA could save 12% in staffing expenses per month and 13% in number of nurses when compare with the existing schedule, while more equitably distributing overtime pay between all nurses.

  4. Batch Scheduling a Fresh Approach

    Science.gov (United States)

    Cardo, Nicholas P.; Woodrow, Thomas (Technical Monitor)

    1994-01-01

    The Network Queueing System (NQS) was designed to schedule jobs based on limits within queues. As systems obtain more memory, the number of queues increased to take advantage of the added memory resource. The problem now becomes too many queues. Having a large number of queues provides users with the capability to gain an unfair advantage over other users by tailoring their job to fit in an empty queue. Additionally, the large number of queues becomes confusing to the user community. The High Speed Processors group at the Numerical Aerodynamics Simulation (NAS) Facility at NASA Ames Research Center developed a new approach to batch job scheduling. This new method reduces the number of queues required by eliminating the need for queues based on resource limits. The scheduler examines each request for necessary resources before initiating the job. Also additional user limits at the complex level were added to provide a fairness to all users. Additional tools which include user job reordering are under development to work with the new scheduler. This paper discusses the objectives, design and implementation results of this new scheduler

  5. Capability of the Maximax&Maximin selection operator in the evolutionary algorithm for a nurse scheduling problem

    Science.gov (United States)

    Ramli, Razamin; Tein, Lim Huai

    2016-08-01

    A good work schedule can improve hospital operations by providing better coverage with appropriate staffing levels in managing nurse personnel. Hence, constructing the best nurse work schedule is the appropriate effort. In doing so, an improved selection operator in the Evolutionary Algorithm (EA) strategy for a nurse scheduling problem (NSP) is proposed. The smart and efficient scheduling procedures were considered. Computation of the performance of each potential solution or schedule was done through fitness evaluation. The best so far solution was obtained via special Maximax&Maximin (MM) parent selection operator embedded in the EA, which fulfilled all constraints considered in the NSP.

  6. Performance Evaluation of Different Scheduling Algorithms in WiMAX

    CERN Document Server

    Al-Howaide, Ala'a Z; Khamayseh, Yaser M; 10.5121/ijcsea.2011.1509

    2011-01-01

    Worldwide Interoperability for Microwave Access (WiMAX) networks were expected to be the main Broadband Wireless Access (BWA) technology that provided several services such as data, voice, and video services including different classes of Quality of Services (QoS), which in turn were defined by IEEE 802.16 standard. Scheduling in WiMAX became one of the most challenging issues, since it was responsible for distributing available resources of the network among all users; this leaded to the demand of constructing and designing high efficient scheduling algorithms in order to improve the network utilization, to increase the network throughput, and to minimize the end-to-end delay. In this study, we presenedt a simulation study to measure the performance of several scheduling algorithms in WiMAX, which were Strict Priority algorithm, Round-Robin (RR), Weighted Round Robin (WRR), Weighted Fair Queuing (WFQ), Self-Clocked Fair (SCF), and Diff-Serv Algorithm.

  7. Multiuser switched diversity scheduling systems with per-user threshold

    KAUST Repository

    Nam, Haewoon

    2010-05-01

    A multiuser switched diversity scheduling scheme with per-user feedback threshold is proposed and analyzed in this paper. The conventional multiuser switched diversity scheduling scheme uses a single feedback threshold for every user, where the threshold is a function of the average signal-to-noise ratios (SNRs) of the users as well as the number of users involved in the scheduling process. The proposed scheme, however, constructs a sequence of feedback thresholds instead of a single feedback threshold such that each user compares its channel quality with the corresponding feedback threshold in the sequence. Numerical and simulation results show that thanks to the flexibility of threshold selection, where a potentially different threshold can be used for each user, the proposed scheme provides a higher system capacity than that for the conventional scheme. © 2006 IEEE.

  8. Feature-based telescope scheduler

    Science.gov (United States)

    Naghib, Elahesadat; Vanderbei, Robert J.; Stubbs, Christopher

    2016-07-01

    Feature-based Scheduler offers a sequencing strategy for ground-based telescopes. This scheduler is designed in the framework of Markovian Decision Process (MDP), and consists of a sub-linear online controller, and an offline supervisory control-optimizer. Online control law is computed at the moment of decision for the next visit, and the supervisory optimizer trains the controller by simulation data. Choice of the Differential Evolution (DE) optimizer, and introducing a reduced state space of the telescope system, offer an efficient and parallelizable optimization algorithm. In this study, we applied the proposed scheduler to the problem of Large Synoptic Survey Telescope (LSST). Preliminary results for a simplified model of LSST is promising in terms of both optimality, and computational cost.

  9. Scheduling Linearly Indexed Assignment Codes

    Science.gov (United States)

    Kailath, Thomas; Roychowdhury, Vwani P.

    1989-05-01

    It has been recently shown that linearly indexed Assignment Codes can be efficiently used for coding several problems especially in signal processing and matrix algebra. In fact, mathematical expressions for many algorithms are directly in the form of linearly indexed codes, and examples include the formulas for matrix multiplication, any m-dimensional convolution/correlation, matrix transposition, and solving matrix Lyapunov's equation. Systematic procedures for converting linearly indexed Assignment Codes to localized algorithms that are closely related to Regular Iterative Algorithms (RIAs) have also been developed. These localized algorithms can be often efficiently scheduled by modeling them as RIAs; however, it is not always efficient to do so. In this paper we shall analyze and develop systematic procedures for determining efficient schedules directly for the linearly indexed ACs and the localized algorithms. We shall also illustrate our procedures by determining schedules for examples such as matrix transposition and Gauss-Jordan elimination algorithm.

  10. Schedulability Analysis for Java Finalizers

    DEFF Research Database (Denmark)

    Bøgholm, Thomas; Hansen, Rene Rydhof; Søndergaard, Hans

    2010-01-01

    Java finalizers perform clean-up and finalisation of objects at garbage collection time. In real-time Java profiles the use of finalizers is either discouraged (RTSJ, Ravenscar Java) or even disallowed (JSR-302), mainly because of the unpredictability of finalizers and in particular their impact...... on the schedulability analysis. In this paper we show that a controlled scoped memory model results in a structured and predictable execution of finalizers, more reminiscent of C++ destructors than Java finalizers. Furthermore, we incorporate finalizers into a (conservative) schedulability analysis for Predictable Java...... programs. Finally, we extend the SARTS tool for automated schedulability analysis of Java bytecode programs to handle finalizers in a fully automated way....

  11. Optimal randomized scheduling by replacement

    Energy Technology Data Exchange (ETDEWEB)

    Saias, I.

    1996-05-01

    In the replacement scheduling problem, a system is composed of n processors drawn from a pool of p. The processors can become faulty while in operation and faulty processors never recover. A report is issued whenever a fault occurs. This report states only the existence of a fault but does not indicate its location. Based on this report, the scheduler can reconfigure the system and choose another set of n processors. The system operates satisfactorily as long as, upon report of a fault, the scheduler chooses n non-faulty processors. We provide a randomized protocol maximizing the expected number of faults the system can sustain before the occurrence of a crash. The optimality of the protocol is established by considering a closely related dual optimization problem. The game-theoretic technical difficulties that we solve in this paper are very general and encountered whenever proving the optimality of a randomized algorithm in parallel and distributed computation.

  12. Schedulability Analysis for Java Finalizers

    DEFF Research Database (Denmark)

    Bøgholm, Thomas; Hansen, Rene Rydhof; Ravn, Anders P.;

    2010-01-01

    Java finalizers perform clean-up and finalisation of objects at garbage collection time. In real-time Java profiles the use of finalizers is either discouraged (RTSJ, Ravenscar Java) or even disallowed (JSR-302), mainly because of the unpredictability of finalizers and in particular their impact ...... programs. Finally, we extend the SARTS tool for automated schedulability analysis of Java bytecode programs to handle finalizers in a fully automated way.......Java finalizers perform clean-up and finalisation of objects at garbage collection time. In real-time Java profiles the use of finalizers is either discouraged (RTSJ, Ravenscar Java) or even disallowed (JSR-302), mainly because of the unpredictability of finalizers and in particular their impact...... on the schedulability analysis. In this paper we show that a controlled scoped memory model results in a structured and predictable execution of finalizers, more reminiscent of C++ destructors than Java finalizers. Furthermore, we incorporate finalizers into a (conservative) schedulability analysis for Predictable Java...

  13. Endogenous scheduling preferences and congestion

    DEFF Research Database (Denmark)

    Fosgerau, Mogens; Small, Kenneth

    2010-01-01

    Dynamic models of congestion so far rely on exogenous scheduling preferences of travelers, based for example on disutility of deviation from a preferred departure or arrival time for a trip. This paper provides a more fundamental view in which travelers derive utility just from consumption...... and leisure, but agglomeration economies at home and at work lead to scheduling preferences forming endogenously. Using bottleneck congestion technology, we obtain an equilibrium queuing pattern consistent with a general version of the Vickrey bottleneck model. However, the policy implications are different....... Compared to the predictions of an analyst observing untolled equilibrium and taking scheduling preferences as exogenous, we find that both the optimal capacity and the marginal external cost of congestion have changed. The benefits of tolling are greater, and the optimal time varying toll is different....

  14. Environmental surveillance master sampling schedule

    Energy Technology Data Exchange (ETDEWEB)

    Bisping, L.E.

    1997-01-01

    Environmental surveillance of the Hanford Site and surrounding areas is conducted by the Pacific Northwest National Laboratory (PNNL)(a) for the US Department of Energy (DOE). This document contains the planned 1997 schedules for routine collection of samples for the Surface Environmental Surveillance Project (SESP) and Drinking Water Monitoring Project. In addition, Section 3.0, Biota, also reflects a rotating collection schedule identifying the year a specific sample is scheduled for collection. The purpose of these monitoring projects is to evaluate levels of radioactive and nonradioactive pollutants in the Hanford environs, as required in DOE Order 5400.1, General Environmental Protection Program, and DOE Order 5400.5, Radiation Protection of the Public and the Environment. The sampling methods will be the same as those described in the Environmental Monitoring Plan, US Department of Energy, Richland Operations Office, DOE/RL91-50, Rev. 1, US Department of Energy, Richland, Washington.

  15. Safe self-scheduling: A parallel loop scheduling scheme for shared-memory multiprocessors

    Energy Technology Data Exchange (ETDEWEB)

    Liu, J. [Western Oregon State College, Monmouth, OR (United States); Saletore, V.A. [Oregon State Univ., Corvallis, OR (United States); Lewis, T.G. [Naval Postgraduate School, Monterey, CA (United States)

    1994-12-01

    In this paper we present Safe Self-Scheduling (SSS), a new scheduling scheme that schedules parallel loops with variable length iteration execution times not known at compile time. The scheme assumes a shared memory space. SSS combines static scheduling with dynamic scheduling and draws favorable advantages from each. First, it reduces the dynamic scheduling overhead by statistically scheduling a major portion of loop iterations. Second, the workload is balanced with simple and efficient self-scheduling scheme by applying a new measure, the smallest critical chore size. Experimental results comparing SSS with other scheduling schemes indicate that SSS surpasses other scheduling schemes. In the experiment on Gauss-Jordan, an application that is suitable for static scheduling schemes, SSS is the only self-scheduling scheme that outperforms the static scheduling scheme. This indicates that SSS achieves a balanced workload with a very small amount of overhead.

  16. 48 CFR 236.102 - Definitions.

    Science.gov (United States)

    2010-10-01

    ... OF DEFENSE SPECIAL CATEGORIES OF CONTRACTING CONSTRUCTION AND ARCHITECT-ENGINEER CONTRACTS General 236.102 Definitions. (1) A-E means architect-engineer. (2) Construction activity means an activity at... other related technical aspects of the planning, design, and construction of facilities; and...

  17. 48 CFR 36.102 - Definitions.

    Science.gov (United States)

    2010-10-01

    ... CONTRACTING CONSTRUCTION AND ARCHITECT-ENGINEER CONTRACTS General 36.102 Definitions. As used in this part— Contract is intended to refer to a contract for construction or a contract for architect-engineer services, unless another meaning is clearly intended. Design means defining the construction requirement...

  18. Micro-Opportunistic Scheduling: The Micro-Boss Factory Scheduler

    Science.gov (United States)

    1994-01-01

    M.R. Garey and D.S. Johnson. Computers and Intractability: A Guide to the Theory of NP-Completeness. Freeman and Co., 1979. [13] Eliyahu M. Goldratt ...techniques is the one developed by Goldratt and his colleagues within the context of the OPT factory scheduling system [13, 15, 10]. OPT demonstrated

  19. Scheduling to Minimize Energy and Flow Time in Broadcast Scheduling

    CERN Document Server

    Moseley, Benjamin

    2010-01-01

    In this paper we initiate the study of minimizing power consumption in the broadcast scheduling model. In this setting there is a wireless transmitter. Over time requests arrive at the transmitter for pages of information. Multiple requests may be for the same page. When a page is transmitted, all requests for that page receive the transmission simulteneously. The speed the transmitter sends data at can be dynamically scaled to conserve energy. We consider the problem of minimizing flow time plus energy, the most popular scheduling metric considered in the standard scheduling model when the scheduler is energy aware. We will assume that the power consumed is modeled by an arbitrary convex function. For this problem there is a $\\Omega(n)$ lower bound. Due to the lower bound, we consider the resource augmentation model of Gupta \\etal \\cite{GuptaKP10}. Using resource augmentation, we give a scalable algorithm. Our result also gives a scalable non-clairvoyant algorithm for minimizing weighted flow time plus energ...

  20. Hubble Systems Optimize Hospital Schedules

    Science.gov (United States)

    2009-01-01

    Don Rosenthal, a former Ames Research Center computer scientist who helped design the Hubble Space Telescope's scheduling software, co-founded Allocade Inc. of Menlo Park, California, in 2004. Allocade's OnCue software helps hospitals reclaim unused capacity and optimize constantly changing schedules for imaging procedures. After starting to use the software, one medical center soon reported noticeable improvements in efficiency, including a 12 percent increase in procedure volume, 35 percent reduction in staff overtime, and significant reductions in backlog and technician phone time. Allocade now offers versions for outpatient and inpatient magnetic resonance imaging (MRI), ultrasound, interventional radiology, nuclear medicine, Positron Emission Tomography (PET), radiography, radiography-fluoroscopy, and mammography.

  1. Endogenous scheduling preferences and congestion

    DEFF Research Database (Denmark)

    Fosgerau, Mogens; Small, Kenneth

    2010-01-01

    Dynamic models of congestion so far rely on exogenous scheduling preferences of travelers, based for example on disutility of deviation from a preferred departure or arrival time for a trip. This paper provides a more fundamental view in which travelers derive utility just from consumption...... and leisure, but agglomeration economies at home and at work lead to scheduling preferences forming endogenously. Using bottleneck congestion technology, we obtain an equilibrium queuing pattern consistent with a general version of the Vickrey bottleneck model. However, the policy implications are different...

  2. 49 CFR 1101.3 - Construction.

    Science.gov (United States)

    2010-10-01

    ... 49 Transportation 8 2010-10-01 2010-10-01 false Construction. 1101.3 Section 1101.3 Transportation Other Regulations Relating to Transportation (Continued) SURFACE TRANSPORTATION BOARD, DEPARTMENT OF TRANSPORTATION RULES OF PRACTICE DEFINITIONS AND CONSTRUCTION § 1101.3 Construction. The rules of construction contained in chapter 1 of title 1...

  3. Developing a comprehensive definition of sustainability.

    Science.gov (United States)

    Moore, Julia E; Mascarenhas, Alekhya; Bain, Julie; Straus, Sharon E

    2017-09-02

    Understanding sustainability is one of the significant implementation science challenges. One of the big challenges in researching sustainability is the lack of consistent definitions in the literature. Most implementation studies do not present a definition of sustainability, even when assessing sustainability. The aim of the current study was to systematically develop a comprehensive definition of sustainability based on definitions already used in the literature. We searched for knowledge syntheses of sustainability and abstracted sustainability definitions from the articles identified through any relevant systematic and scoping reviews. The constructs in the abstracted sustainability definitions were mapped to an existing definition. The comprehensive definition of sustainability was revised to include emerging constructs. We identified four knowledge syntheses of sustainability, which identified 209 original articles. Of the 209 articles, 24 (11.5%) included a definition of sustainability. These definitions were mapped to three constructs from an existing definition, and nine new constructs emerged. We reviewed all constructs and created a revised definition: (1) after a defined period of time, (2) a program, clinical intervention, and/or implementation strategies continue to be delivered and/or (3) individual behavior change (i.e., clinician, patient) is maintained; (4) the program and individual behavior change may evolve or adapt while (5) continuing to produce benefits for individuals/systems. All 24 definitions were remapped to the comprehensive definition (percent agreement among three coders was 94%). Of the 24 definitions, 17 described the continued delivery of a program (70.8%), 17 mentioned continued outcomes (70.8%), 13 mentioned time (54.2%), 8 addressed the individual maintenance of a behavior change (33.3%), and 6 described the evolution or adaptation (25.0%). We drew from over 200 studies to identify 24 existing definitions of sustainability

  4. An Integrated Expert System for Linear Scheduling Heavy Earthmoving Operations

    Directory of Open Access Journals (Sweden)

    Nizar Markiz

    2016-01-01

    Full Text Available Heavy earthmoving operations are repetitive in nature and vulnerable to time-related restraints and uncertainties. Therefore, at the conceptual stage, scheduling these operations can take a linear form, known as linear schedule or line of balance (LOB. In such type of work, generating a preliminary line of balance for variable sequencing of activities is crucial. In this paper, an integrated expert system for determining preliminary linear schedules for heavy earthmoving operations at the conceptual stage is presented. The proposed system incorporates numerous factors that influence the analysis of earthmoving operations, which include geological and topographical parameters used to determine productivity rates at the conceptual stage. Also, the proposed system is capable of automatically generating a line of balance based on a stochastic scheduling technique via the metaheuristic simulated annealing intelligent approach to incorporate randomness and uncertainties in performing the associated activities. A parametric analysis is conducted in order to quantify the system’s degree of accuracy. An actual case project is then utilized to illustrate its numerical capabilities. Generating accurate linear schedules for heavy earthmoving operations at the conceptual design stage is anticipated to be of major significance to infrastructure project stakeholders, engineers, and construction managers by detecting schedule’s conflicts early in order to enhance overall operational logistics.

  5. The CHI 2013 interactive schedule

    DEFF Research Database (Denmark)

    Satyanarayan, Arvind; Strazzulla, Daniel; Klokmose, Clemens Nylandsted

    2013-01-01

    is available. The CHI'13 Interactive Schedule helps attendees navigate this wealth of video content in order to identify events they would like to attend. It consists of a number of large display screens throughout the conference venue which cycle through a video playlist of events. Attendees can interact...

  6. A scheduling model for astronomy

    Science.gov (United States)

    Solar, M.; Michelon, P.; Avarias, J.; Garces, M.

    2016-04-01

    Astronomical scheduling problem has several external conditions that change dynamically at any time during observations, like weather condition (humidity, temperature, wind speed, opacity, etc.), and target visibility conditions (target over the horizon, Sun/Moon blocking the target). Therefore, a dynamic re-scheduling is needed. An astronomical project will be scheduled as one or more Scheduling Blocks (SBs) as an atomic unit of astronomical observations. We propose a mixed integer linear programming (MILP) solution to select the best SBs, favors SBs with high scientific values, and thus maximizing the quantity of completed observation projects. The data content of Atacama Large Millimeter/Submillimeter Array (ALMA) projects of cycle 0 and cycle 1 were analyzed, and a synthetic set of tests of the real instances was created. Two configurations, one of 5000 SBs in a 3 months season and another 10,000 SBs a 6 months season were created. These instances were evaluated with excellent results. Through the testing it is showed that the MILP proposal has optimal solutions.

  7. Lifetime Improvement by Battery Scheduling

    NARCIS (Netherlands)

    Jongerden, M.R.; Schmitt, Jens B.; Haverkort, Boudewijn R.H.M.

    2012-01-01

    The use of mobile devices is often limited by the lifetime of their batteries. For devices that have multiple batteries or that have the option to connect an extra battery, battery scheduling, thereby exploiting the recovery properties of the batteries, can help to extend the system lifetime. Due to

  8. Lifetime improvement by battery scheduling

    NARCIS (Netherlands)

    Jongerden, M.R.; Haverkort, Boudewijn R.H.M.

    2011-01-01

    The use of mobile devices is often limited by the lifetime of its battery. For devices that have multiple batteries or that have the option to connect an extra battery, battery scheduling, thereby exploiting the recovery properties of the batteries, can help to extend the system lifetime. Due to the

  9. Lifetime Improvement by Battery Scheduling

    NARCIS (Netherlands)

    Jongerden, M.R.; Schmitt, Jens B.; Haverkort, Boudewijn R.H.M.

    The use of mobile devices is often limited by the lifetime of their batteries. For devices that have multiple batteries or that have the option to connect an extra battery, battery scheduling, thereby exploiting the recovery properties of the batteries, can help to extend the system lifetime. Due to

  10. Lifetime improvement by battery scheduling

    NARCIS (Netherlands)

    Jongerden, M.R.; Haverkort, Boudewijn R.H.M.

    The use of mobile devices is often limited by the lifetime of its battery. For devices that have multiple batteries or that have the option to connect an extra battery, battery scheduling, thereby exploiting the recovery properties of the batteries, can help to extend the system lifetime. Due to the

  11. CROP UNDER DEFICIT IRRIGATION SCHEDULING

    African Journals Online (AJOL)

    This study presents crop coefficient (Kc) values of TMV 1 -ST maize variety ... given time from planting to the time it is harvested. ... real time irrigation scheduling for high frequent and non-fiequent water .... 10 m, and the average soil bulk density was 1420 kg/m'. ...... Performance Evaluation of Fadama Irrigation Practice.

  12. Environmental surveillance master sampling schedule

    Energy Technology Data Exchange (ETDEWEB)

    Bisping, L.E.

    1996-02-01

    Environmental surveillance of the Hanford Site and surrounding areas is conducted by the Pacific Northwest National Laboratory (PNNL) for the US Department of Energy (DOE). This document contains the planned 1996 schedules for routine collection of samples for the Surface Environmental Surveillance Project (SESP), Drinking Water Project, and Ground-Water Surveillance Project.

  13. Decentralized Real-Time Scheduling

    Science.gov (United States)

    1990-08-01

    917-932, August, 1987. [ Daniels 86] D. C. Daniels and H. F. Wedde. Real-Time Performance of a Completely Distributed Operating System. In Proceedings...imnmediate execuoon The schedule c.-eated by the SeltctPhaseProcfj procedure is an ordere-d lis t of mocl -phnise pairs, each placed according to the

  14. Cooperation in Networks and Scheduling

    NARCIS (Netherlands)

    van Velzen, S.

    2005-01-01

    This thesis deals with various models of cooperation in networks and scheduling. The main focus is how the benefits of this cooperation should be divided among the participating individuals. A major part of this analysis is concerned with stability of the cooperation. In addition, allocation rules a

  15. Constructions over localizations of rings

    Directory of Open Access Journals (Sweden)

    Alessandro Logar

    1987-11-01

    Full Text Available In this paper we construct a category of effective noetherian rings in which linear equations can be “solved”. This category is closed with respect to some important constructions like trascendental extensions, quotientations, finite products and localizations with respect to a large class of multiplicatively closed systems. Hence it gives a definition of “constructive” rings.

  16. Visitor schedule management system- an intelligent decision support system

    CERN Document Server

    Nidhra, Srinivas; Ethiraj, Vinay Sudha

    2012-01-01

    Travelling salesman problem is a problem which is of high interest for researchers, industry professionals, and academicians. Visitor or salesman used to face lot of problems with respect to scheduling based on meeting top ranked clients. Even excel sheet made the work tedious. So these flaws propelled us to design an intelligent decision support system. This paper reports the problem definition we tried to address and possible solution to this problem. We even explained the project design and implementation of our visitor schedule management system.. Our system made a major contribution in terms of valuable resources such as time and satisfying high ranked clients efficiently. We used optimization via mathematical programming to solve these issues.

  17. Application Scheduling in Mobile Cloud Computing with Load Balancing

    Directory of Open Access Journals (Sweden)

    Xianglin Wei

    2013-01-01

    Full Text Available Mobile cloud computing (MCC enables the mobile devices to offload their applications to the cloud and thus greatly enriches the types of applications on mobile devices and enhances the quality of service of the applications. Under various circumstances, researchers have put forward several MCC architectures. However, how to reduce the response latency while efficiently utilizing the idle service capacities of the mobile devices still remains a challenge. In this paper, we firstly give a definition of MCC and divide the recently proposed architectures into four categories. Secondly, we present a Hybrid Local Mobile Cloud Model (HLMCM by extending the Cloudlet architecture. Then, after formulating the application scheduling problems in HLMCM and bringing forward the Hybrid Ant Colony algorithm based Application Scheduling (HACAS algorithm, we finally validate the efficiency of the HACAS algorithm by simulation experiments.

  18. Optimum Production Control and Workforce Scheduling of Machining Project

    Science.gov (United States)

    Lan, Tian-Syung; Lo, Chih-Yao; Hou, Cheng-I.

    Through the proposed model in this study, the production control with the consideration of workforce scheduling for advanced manufacturing systems becomes realistically and concretely solvable. This study not only meditates the concept of balancing machine productivity and human ability into the objective, but also implements Calculus of Variations to optimize the profit for a deterministic production quantity. In addition, the optimum solutions of dynamic productivity control and workforce scheduling are comprehensively provided. Moreover, the decision criteria for selecting the optimum solution and the sensitivity analysis of the critical variables are fully discussed. This study definitely contributes the applicable strategy to control the productivity and workforce in manufacturing and provides the valuable tool to conclusively optimize the profit of a machining project for operations research in today`s manufacturing industry with profound insight.

  19. BEE COLONIES APPLIED TO MULTIPROCESSOR SCHEDULING

    OpenAIRE

    Butt, Nouman

    2009-01-01

    In order to achieve the high performance, we need to have an efficient scheduling of a parallelprogram onto the processors in multiprocessor systems that minimizes the entire executiontime. This problem of multiprocessor scheduling can be stated as finding a schedule for ageneral task graph to be executed on a multiprocessor system so that the schedule length can be minimize [10]. This scheduling problem is known to be NP- Hard.In multi processor task scheduling, we have a number of CPU’s on ...

  20. A New Maximum Entropy Estimation of Distribution Algorithm to Solve Uncertain Information Job-shop Scheduling Problem

    Directory of Open Access Journals (Sweden)

    Lu Lin

    2009-10-01

    Full Text Available Estimation of Distribution Algorithm (EDA is a new kinds of colony evolution algorithm, through counting excellent information of individuals of the present colony EDA construct probability distribution model, then sample the model produces newt generation. To solve the NP-Hard question as EDA searching optimum network structure a new Maximum Entropy Distribution Algorithm (MEEDA is provided. The algorithm takes Jaynes principle as the basis, makes use of the maximum entropy of random variables to estimate the minimum bias probability distribution of random variables, and then regard it as the evolution model of the algorithm, which produces the optimal/near optimal solution. Then this paper presents a rough programming model for job shop scheduling under uncertain information problem. The method overcomes the defects of traditional methods which need pre-set authorized characteristics or amount described attributes, designs multi-objective optimization mechanism and expands the application space of a rough set in the issue of job shop scheduling under uncertain information environment. Due to the complexity of the proposed model, traditional algorithms have low capability in producing a feasible solution. We use MEEDA in order to enable a definition of a solution within a reasonable amount of time. We assume that machine flexibility in processing operations to decrease the complexity of the proposed model. Muth and Thompson’s benchmark problems tests are used to verify and validate the proposed rough programming model and its algorithm. The computational results obtained by MEEDA are compared with GA. The compared results prove the effectiveness of MEEDA in the job shop scheduling problem under uncertain information environment.

  1. Delays in nuclear power plant construction. Volume II. Final report

    Energy Technology Data Exchange (ETDEWEB)

    Mason, G.E.; Larew, R.E.; Borcherding, J.D.; Okes, S.R. Jr.; Rad, P.F.

    1977-12-14

    The report identifies barriers to shortening nuclear power plant construction schedules and recommends research efforts which should minimize or eliminate the identified barriers. The identified barriers include (1) Design and Construction Interfacing Problems; (2) Problems Relating to the Selection and Use of Permanent Materials and Construction Methods; (3) Construction Coordination and Communication Problems; and (4) Problems Associated with Manpower Availability and Productivity.

  2. The development of stochastic process modeling through risk analysis derived from scheduling of NPP project

    Energy Technology Data Exchange (ETDEWEB)

    Lee, Kwang Ho; Roh, Myung Sub [KEPCO International Nuclear Graduate School, Ulsan (Korea, Republic of)

    2013-10-15

    There are so many different factors to consider when constructing a nuclear power plant successfully from planning to decommissioning. According to PMBOK, all projects have nine domains from a holistic project management perspective. They are equally important to all projects, however, this study focuses mostly on the processes required to manage timely completion of the project and conduct risk management. The overall objective of this study is to let you know what the risk analysis derived from scheduling of NPP project is, and understand how to implement the stochastic process modeling through risk management. Building the Nuclear Power Plant is required a great deal of time and fundamental knowledge related to all engineering. That means that integrated project scheduling management with so many activities is necessary and very important. Simulation techniques for scheduling of NPP project using Open Plan program, Crystal Ball program, and Minitab program can be useful tools for designing optimal schedule planning. Thus far, Open Plan and Monte Carlo programs have been used to calculate the critical path for scheduling network analysis. And also, Minitab program has been applied to monitor the scheduling risk. This approach to stochastic modeling through risk analysis of project activities is very useful for optimizing the schedules of activities using Critical Path Method and managing the scheduling control of NPP project. This study has shown new approach to optimal scheduling of NPP project, however, this does not consider the characteristic of activities according to the NPP site conditions. Hence, this study needs more research considering those factors.

  3. 49 CFR 611.5 - Definitions.

    Science.gov (United States)

    2010-10-01

    ... TRANSPORTATION MAJOR CAPITAL INVESTMENT PROJECTS § 611.5 Definitions. The definitions established by Titles 12... transit investment means any project that involves the construction of a new fixed guideway system or... project is compared to develop project justification measures. Relative to the no build alternative, it...

  4. 18 CFR 1.101 - Definitions.

    Science.gov (United States)

    2010-04-01

    ... 18 Conservation of Power and Water Resources 1 2010-04-01 2010-04-01 false Definitions. 1.101 Section 1.101 Conservation of Power and Water Resources FEDERAL ENERGY REGULATORY COMMISSION, DEPARTMENT OF ENERGY GENERAL RULES RULES OF GENERAL APPLICABILITY Definitions and Rules of Construction §...

  5. Scheduling Algorithm for Mission Planning and Logistics Evaluation (SAMPLE). Volume 2: Mission payloads subsystem description

    Science.gov (United States)

    Dupnick, E.; Wiggins, D.

    1980-01-01

    The scheduling algorithm for mission planning and logistics evaluation (SAMPLE) is presented. Two major subsystems are included: The mission payloads program; and the set covering program. Formats and parameter definitions for the payload data set (payload model), feasible combination file, and traffic model are documented.

  6. Regulating electricity demand peaks for home appliances using reversible fair scheduling

    DEFF Research Database (Denmark)

    Kardaras, Georgios; Rossello Busquet, Ana; Iversen, Villy Bæk

    2010-01-01

    of home appliances into priority classes and the definition of a maximum power consumption threshold which is not allowed to be exceeded during peak hours. According to the bandwidth demand and priority of each class, the reversible fair scheduling algorithm delays some of the appliances and prolongs...

  7. How should periods without social interaction be scheduled? Children's preference for practical schedules of positive reinforcement.

    Science.gov (United States)

    Luczynski, Kevin C; Hanley, Gregory P

    2014-01-01

    Several studies have shown that children prefer contingent reinforcement (CR) rather than yoked noncontingent reinforcement (NCR) when continuous reinforcement is programmed in the CR schedule. Preference has not, however, been evaluated for practical schedules that involve CR. In Study 1, we assessed 5 children's preference for obtaining social interaction via a multiple schedule (periods of fixed-ratio 1 reinforcement alternating with periods of extinction), a briefly signaled delayed reinforcement schedule, and an NCR schedule. The multiple schedule promoted the most efficient level of responding. In general, children chose to experience the multiple schedule and avoided the delay and NCR schedules, indicating that they preferred multiple schedules as the means to arrange practical schedules of social interaction. In Study 2, we evaluated potential controlling variables that influenced 1 child's preference for the multiple schedule and found that the strong positive contingency was the primary variable.

  8. Advanced construction management for lunar base construction - Surface operations planner

    Science.gov (United States)

    Kehoe, Robert P.

    1992-01-01

    The study proposes a conceptual solution and lays the framework for developing a new, sophisticated and intelligent tool for a lunar base construction crew to use. This concept integrates expert systems for critical decision making, virtual reality for training, logistics and laydown optimization, automated productivity measurements, and an advanced scheduling tool to form a unique new planning tool. The concept features extensive use of computers and expert systems software to support the actual work, while allowing the crew to control the project from the lunar surface. Consideration is given to a logistics data base, laydown area management, flexible critical progress scheduler, video simulation of assembly tasks, and assembly information and tracking documentation.

  9. A Scheduling Problem for Hospital Operating Theatre

    CERN Document Server

    Sufahani, Suliadi F; Ismail, Zuhaimy

    2012-01-01

    This paper provides a classification of real scheduling problems. Various ways have been examined and described on the problem. Scheduling problem faces a tremendous challenges and difficulties in order to meet the preferences of the consumer. Dealing with scheduling problem is complicated, inefficient and time-consuming. This study aims to develop a mathematical model for scheduling the operating theatre during peak and off peak time. Scheduling problem is a well known optimization problem and the goal is to find the best possible optimal solution. In this paper, we used integer linear programming technique for scheduling problem in a high level of synthesis. In addition, time and resource constrained scheduling was used. An optimal result was fully obtained by using the software GLPK/AMPL. This model can be adopted to solve other scheduling problems, such as the Lecture Theatre, Cinemas and Work Shift.

  10. Immunization Schedules for Infants and Children

    Science.gov (United States)

    ... Everyone: Easy-to-read Schedules Infants and Children Preteens and Teens Adults Display Immunization Schedules and Quiz ... file Microsoft Word file Microsoft Excel file Audio/Video file Apple Quicktime file RealPlayer file Text file ...

  11. DME Prosthetics Orthotics, and Supplies Fee Schedule

    Data.gov (United States)

    U.S. Department of Health & Human Services — Durable Medical Equipment, Prosthetics-Orthotics, and Supplies Fee Schedule. The list contains the fee schedule amounts, floors, and ceilings for all procedure codes...

  12. GSA eLibrary Schedules and Contracts

    Data.gov (United States)

    General Services Administration — GSA eLibrary (formerly Schedules e-Library) is the online source for the latest contract award information for: GSA Schedules; Department of Veterans Affairs (VA)...

  13. CMS Planning and Scheduling System

    CERN Document Server

    Kotamaki, M

    1998-01-01

    The paper describes the procedures and the system to build and maintain the schedules needed to manage time, resources, and progress of the CMS project. The system is based on the decomposition of the project into work packages, which can be each considered as a complete project with its own structure. The system promotes the distribution of the decision making and responsibilities to lower levels in the organisation by providing a state-of-the-art system to formalise the external commitments of the work packages without limiting their ability to modify their internal schedules to best meet their commitments. The system lets the project management focus on the interfaces between the work packages and alerts the management immediately if a conflict arises. The proposed system simplifies the planning and management process and eliminates the need for a large, centralised project management system.

  14. LDRD Report: Scheduling Irregular Algorithms

    Energy Technology Data Exchange (ETDEWEB)

    Boman, Erik G. [Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)

    2014-10-01

    This LDRD project was a campus exec fellowship to fund (in part) Donald Nguyen’s PhD research at UT-Austin. His work has focused on parallel programming models, and scheduling irregular algorithms on shared-memory systems using the Galois framework. Galois provides a simple but powerful way for users and applications to automatically obtain good parallel performance using certain supported data containers. The naïve user can write serial code, while advanced users can optimize performance by advanced features, such as specifying the scheduling policy. Galois was used to parallelize two sparse matrix reordering schemes: RCM and Sloan. Such reordering is important in high-performance computing to obtain better data locality and thus reduce run times.

  15. Dynamic Broadcast Scheduling in DDBMS

    Directory of Open Access Journals (Sweden)

    Babu Santhalingam,

    2011-01-01

    Full Text Available This system will address the problem of online scheduling sequential data objects with the principle of periodicity in the context of dynamic information dissemination. Many modern information applications spread dynamically generated data objects and answer the complex query for retrieving multiple data objects. In dynamic environments, data streams need to be online processed rather than being stored and later retrieved to answer queries. Particularly, data objects are produced dynamically by the information providers, interleaved and disseminated efficiently by the broadcasting servers, and associated sequentially in the client sides. The proposed algorithm with a well-specific gain measure function prominently outperforms the FIFO schedule and is able to minimize the mean service access time to the extent close to the theoretical optimum.

  16. Building Better Nurse Scheduling Algorithms

    CERN Document Server

    Aickelin, Uwe

    2008-01-01

    The aim of this research is twofold: Firstly, to model and solve a complex nurse scheduling problem with an integer programming formulation and evolutionary algorithms. Secondly, to detail a novel statistical method of comparing and hence building better scheduling algorithms by identifying successful algorithm modifications. The comparison method captures the results of algorithms in a single figure that can then be compared using traditional statistical techniques. Thus, the proposed method of comparing algorithms is an objective procedure designed to assist in the process of improving an algorithm. This is achieved even when some results are non-numeric or missing due to infeasibility. The final algorithm outperforms all previous evolutionary algorithms, which relied on human expertise for modification.

  17. Scheduling Coast Guard District Cutters

    Science.gov (United States)

    1992-09-01

    DESCRIPTION ..... ............ .. 14 D. COSTS, PENALTIES, AND MEASURES OF EFFECTIVENESS 15 iv IV . COMPUTATIONAL EXPERIENCE ............ 19 A. TEST PROBLEMS...used. Using the model of Chapter III, computational performance for a year’s worth of actual data from the First District is presented in Chapter IV ...2G, B-2NY, B-2SAR, C); t - week the cutter assumes the patrol status. COSTO - cost of scheduling cutter i to patrol k; (1 if ship i is available for

  18. Environmental surveillance master sampling schedule

    Energy Technology Data Exchange (ETDEWEB)

    Bisping, L.E.

    1995-02-01

    Environmental surveillance of the Hanford Site and surrounding areas is conducted by the Pacific Northwest Laboratory (PNL) for the U.S. Department of Energy (DOE). This document contains the planned 1994 schedules for routine collection of samples for the Surface Environmental Surveillance Project (SESP), Drinking Water Project, and Ground-Water Surveillance Project. Samples are routinely collected for the SESP and analyzed to determine the quality of air, surface water, soil, sediment, wildlife, vegetation, foodstuffs, and farm products at Hanford Site and surrounding communities. The responsibility for monitoring onsite drinking water falls outside the scope of the SESP. PNL conducts the drinking water monitoring project concurrent with the SESP to promote efficiency and consistency, utilize expertise developed over the years, and reduce costs associated with management, procedure development, data management, quality control, and reporting. The ground-water sampling schedule identifies ground-water sampling .events used by PNL for environmental surveillance of the Hanford Site. Sampling is indicated as annual, semi-annual, quarterly, or monthly in the sampling schedule. Some samples are collected and analyzed as part of ground-water monitoring and characterization programs at Hanford (e.g. Resources Conservation and Recovery Act (RCRA), Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA), or Operational). The number of samples planned by other programs are identified in the sampling schedule by a number in the analysis column and a project designation in the Cosample column. Well sampling events may be merged to avoid redundancy in cases where sampling is planned by both-environmental surveillance and another program.

  19. Evaluating Factors that Affect Construction Project Duration

    Science.gov (United States)

    1992-09-01

    Robinson Report on Artificial Intelligence, Vol 5, No. 3 (March 1989). Arditi , David, "Diffusion of Network Planning in Construction," Journal of the...Construction Division, Vol 109, No. CO1 (American Society of Civil Engineers [ASCE], March 1983). Arditi , David, et al., "Line of Balance Scheduling in

  20. A Supervised Learning Approach to Search of Definitions

    Institute of Scientific and Technical Information of China (English)

    Jun Xu; Yun-Bo Cao; Hang Li; Min Zhao; Ya-Lou Huang

    2006-01-01

    This paper addresses the issue of search of definitions. Specifically, for a given term, we are to find out its definition candidates and rank the candidates according to their likelihood of being good definitions. This is in contrast to the traditional methods of either generating a single combined definition or outputting all retrieved definitions. Definition ranking is essential for tasks. A specification for judging the goodness of a definition is given. In the specification, a definition is categorized into one of the three levels: good definition, indifferent definition, or bad definition. Methods of performing definition ranking are also proposed in this paper, which formalize the problem as either classification or ordinal regression.We employ SVM (Support Vector Machines) as the classification model and Ranking SVM as the ordinal regression model respectively, and thus they rank definition candidates according to their likelihood of being good definitions. Features for constructing the SVM and Ranking SVM models are defined, which represent the characteristics of terms, definition candidate, and their relationship. Experimental results indicate that the use of SVM and Ranking SVM can significantly outperform the baseline methods such as heuristic rules, the conventional information retrieval-Okapi, or SVM regression.This is true when both the answers are paragraphs and they are sentences. Experimental results also show that SVM or Ranking SVM models trained in one domain can be adapted to another domain, indicating that generic models for definition ranking can be constructed.

  1. 19 CFR 122.63 - Scheduled airlines.

    Science.gov (United States)

    2010-04-01

    ... 19 Customs Duties 1 2010-04-01 2010-04-01 false Scheduled airlines. 122.63 Section 122.63 Customs... AIR COMMERCE REGULATIONS Clearance of Aircraft and Permission To Depart § 122.63 Scheduled airlines... scheduled airlines covered by this subpart. (a) Clearance at other than airport of final departure. Aircraft...

  2. Response Strength in Extreme Multiple Schedules

    Science.gov (United States)

    McLean, Anthony P.; Grace, Randolph C.; Nevin, John A.

    2012-01-01

    Four pigeons were trained in a series of two-component multiple schedules. Reinforcers were scheduled with random-interval schedules. The ratio of arranged reinforcer rates in the two components was varied over 4 log units, a much wider range than previously studied. When performance appeared stable, prefeeding tests were conducted to assess…

  3. Models and algorithms for stochastic online scheduling

    NARCIS (Netherlands)

    Megow, N.; Uetz, Marc Jochen; Vredeveld, T.

    We consider a model for scheduling under uncertainty. In this model, we combine the main characteristics of online and stochastic scheduling in a simple and natural way. Job processing times are assumed to be stochastic, but in contrast to traditional stochastic scheduling models, we assume that

  4. 77 FR 41258 - FOIA Fee Schedule Update

    Science.gov (United States)

    2012-07-13

    ... SAFETY BOARD 10 CFR Part 1703 FOIA Fee Schedule Update AGENCY: Defense Nuclear Facilities Safety Board... publishing its Freedom of Information Act (FOIA) Fee Schedule Update pursuant to the Board's regulations..., the Board's General Manager will update the FOIA Fee Schedule once every 12 months. The previous...

  5. Optimization of Daily Flight Training Schedules

    Science.gov (United States)

    2014-03-01

    training syllabus . 14. SUBJECT TERMS Scheduling, optimization, flight training, Advance Strike Training, pilot 15. NUMBER OF...SKEDSOs that can help them increase throughput of students in the advanced strike training syllabus . vi THIS PAGE INTENTIONALLY LEFT BLANK vii...instructor pilots with student naval aviators to achieve syllabus events. The schedule is built manually each day by squadron scheduling officers (SKEDSOs

  6. Centralized scheduling an unanticipated revenue cycle opportunity.

    Science.gov (United States)

    O'Neill, Daniel P; Kenniff, Peter B

    2007-09-01

    Centralized outpatient scheduling can provide acute care hospitals with accessibility and service levels equal to freestanding facilities, enabling hospitals to recapture lost market share. Two implementation strategies are critical to the success of centralized scheduling: Correctly developing the schedule. Managing the incoming call volume.

  7. An improved scheduling algorithm for linear networks

    KAUST Repository

    Bader, Ahmed

    2017-02-09

    In accordance with the present disclosure, embodiments of an exemplary scheduling controller module or device implement an improved scheduling process such that the targeted reduction in schedule length can be achieve while incurring minimal energy penalty by allowing for a large rate (or duration) selection alphabet.

  8. Response Strength in Extreme Multiple Schedules

    Science.gov (United States)

    McLean, Anthony P.; Grace, Randolph C.; Nevin, John A.

    2012-01-01

    Four pigeons were trained in a series of two-component multiple schedules. Reinforcers were scheduled with random-interval schedules. The ratio of arranged reinforcer rates in the two components was varied over 4 log units, a much wider range than previously studied. When performance appeared stable, prefeeding tests were conducted to assess…

  9. Grouping Synonyms by Definitions

    CERN Document Server

    Falk, Ingrid; Jacquey, Evelyne; Venant, Fabienne

    2009-01-01

    We present a method for grouping the synonyms of a lemma according to its dictionary senses. The senses are defined by a large machine readable dictionary for French, the TLFi (Tr\\'esor de la langue fran\\c{c}aise informatis\\'e) and the synonyms are given by 5 synonym dictionaries (also for French). To evaluate the proposed method, we manually constructed a gold standard where for each (word, definition) pair and given the set of synonyms defined for that word by the 5 synonym dictionaries, 4 lexicographers specified the set of synonyms they judge adequate. While inter-annotator agreement ranges on that task from 67% to at best 88% depending on the annotator pair and on the synonym dictionary being considered, the automatic procedure we propose scores a precision of 67% and a recall of 71%. The proposed method is compared with related work namely, word sense disambiguation, synonym lexicon acquisition and WordNet construction.

  10. Interference Aware Routing for Minimum Frame Length Schedules in Wireless Mesh Networks

    Directory of Open Access Journals (Sweden)

    Katerina Papadaki

    2008-10-01

    Full Text Available The focus of this paper is on routing in wireless mesh networks (WMNs that results in spatial TDMA (STDMA schedules with minimum frame length. In particular, the emphasis is on spanning tree construction; and we formulate the joint routing, power control, and scheduling problem as a mixedinteger linear program (MILP. Since this is an 𝒩𝒫-complete problem, we propose a low-complexity iterative pruning-based routing scheme that utilizes scheduling information to construct the spanning tree. A randomized version of this scheme is also discussed and numerical investigations reveal that the proposed iterative pruning algorithms outperform previously proposed routing schemes that aim to minimize the transmitted power or interference produced in the network without explicitly taking into account scheduling decisions.

  11. On the Road to Improved Scheduling: Reducing the Effects of Variation in Duration

    DEFF Research Database (Denmark)

    Lindhard, Søren; Wandahl, Søren

    2013-01-01

    Scheduling in onsite construction is based on commitments. Unmet commitments result in non-completions which leads to waste. Moreover, it is important that commitments are realistic to avoid both positive and negative variation in duration. Negative variation is destructive to plans and schedules...... and results in delays, while positive variation is destructive to productivity by creating unexploited gaps between activities, thus inducing unexploited capacity. By registering non-completion at three construction sites, the magnitude of activities inducing negative variation has been mapped. In total, 5424...... activities have been registered whereof 1450 activities ended up as non-completions. Thus, 27% of the scheduled activities did not finish on schedule. Both positive and negative variation can be minimized by improving the quality of the commitments. Moreover, positive variation can be exploited by: (a...

  12. Construction Managers’ Perception of the Factors Affecting Sustainability in Construction Projects

    Directory of Open Access Journals (Sweden)

    Reza Taheriattar

    2014-07-01

    Full Text Available Sustainable construction is a comprehensive concept which requires long-term planning. Moreover, construction managers play a key role in leading, planning and scheduling of a construction project. As a result, sustainability of construction projects can be affected by construction managers’ decisions. In addition, for greater development of sustainable construction, affecting factors should firstly be notified. Therefore, it seems necessary to investigate construction managers’ perception of the factors affecting sustainability in construction projects. To quantify managers’ perspective of construction sustainability, a survey involving 15 construction managers from Iran construction industry was employed. A statistical comparative analysis used to identify the most important factors affecting sustainability performance at project-level. The results show that most of the factors affecting sustainable construction can be addressed by management teams. The findings will be useful for managers to improve construction sustainability performance at project-level.

  13. It Is Not Just about the Schedule: Key Factors in Effective Reference Desk Scheduling and Management

    Science.gov (United States)

    Sciammarella, Susan; Fernandes, Maria Isabel; McKay, Devin

    2008-01-01

    Reference desk scheduling is one of the most challenging tasks in the organizational structure of an academic library. The ability to turn this challenge into a workable and effective function lies with the scheduler and indirectly the cooperation of all librarians scheduled for reference desk service. It is the scheduler's sensitivity to such…

  14. PHENIX WBS notes. Cost and schedule review copy

    Energy Technology Data Exchange (ETDEWEB)

    1994-02-01

    The Work Breakdown Structure (WBS) Book begins with this Overview section, which contains the high-level summary cost estimate, the cost profile, and the global construction schedule. The summary cost estimate shows the total US cost and the cost in terms of PHENIX construction funds for building the PHENIX detector. All costs in the WBS book are shown in FY 1993 dollars. Also shown are the institutional and foreign contributions, the level of pre-operations funding, and the cost of deferred items. Pie charts are presented at PHENIX WBS level 1 and 2 that show this information. The PHENIX construction funds are shown broken down to PHENIX WBS level 3 items per fiscal year, and the resulting profile is compared to the RHIC target profile. An accumulated difference of the two profiles is also shown. The PHENIX global construction schedule is presented at the end of the Overview section. Following the Overview are sections for each subsystem. Each subsystem section begins with a summary cost estimate, cost profile, and critical path. The total level 3 cost is broken down into fixed costs (M&S), engineering costs (EDIA) and labor costs. Costs are further broken down in terms of PHENIX construction funds, institutional and foreign contributions, pre-operations funding, and deferred items. Also shown is the contingency at level 3 and the level 4 breakdown of the total cost. The cost profile in fiscal years is shown at level 3. The subsystem summaries are followed by the full cost estimate and schedule sheets for that subsystem. These detailed sheets are typically carried down to level 7 or 8. The cost estimate Total, M&S, EDIA, and Labor breakdowns, as well as contingency, for each WBS entry.

  15. PHENIX Work Breakdown Structure. Cost and schedule review copy

    Energy Technology Data Exchange (ETDEWEB)

    1994-02-01

    The Work Breakdown Structure (WBS) Book begins with this Overview section, which contains the high-level summary cost estimate, the cost profile, and the global construction schedule. The summary cost estimate shows the total US cost and the cost in terms of PHENIX construction funds for building the PHENIX detector. All costs in the WBS book are shown in FY 1993 dollars. Also shown are the institutional and foreign contributions, the level of pre-operations funding, and the cost of deferred items. Pie charts are presented at PHENIX WBS level 1 and 2 that show this information. The PHENIX construction funds are shown broken down to PHENIX WBS level 3 items per fiscal year, and the resulting profile is compared to the RHIC target profile. An accumulated difference of the two profiles is also shown. The PHENIX global construction schedule is presented at the end of the Overview section. Following the Overview are sections for each subsystem. Each subsystem section begins with a summary cost estimate, cost profile, and critical path. The total level 3 cost is broken down into fixed costs (M&S), engineering costs (EDIA) and labor costs. Costs are further broken down in terms of PHENIX construction funds, institutional and foreign contributions, pre-operations funding, and deferred items. Also shown is the contingency at level 3 and the level 4 breakdown of the total cost. The cost profile in fiscal years is shown at level 3. The subsystem summaries are followed by the full cost estimate and schedule sheets for that subsystem. These detailed sheets are typically carried down to level 7 or 8. The cost estimate shows Total, M&S, EDIA, and Labor breakdowns, as well as contingency, for each WBS entry.

  16. Criticality of Schedule Constraints – Classification and Identification for Project Management

    Directory of Open Access Journals (Sweden)

    Qui T. Nguyen

    2014-01-01

    Full Text Available In construction scheduling, constraints among activities are vital as they govern the schedule solution. Understanding their criticality is essential for better schedule management. This paper presents a systematic method to classify and identify the criticality of schedule constraints for the schedule management from the constraint perspective. In terms of criticality, schedule constraints can be grouped into four types: project-critical, activity-critical, sequence-critical and non-critical. Project-critical constraints are those which govern start/finish time of critical activities and the project end time. Activity-critical constraints define the start/finish time of non-critical activities, and sequence-critical constraints are those whose existence affect the start/finish time of some activities or the project end time. Constraints belonging to any of these groups are vital to a schedule as they cannot be removed from the constraint collection. Non-critical constraints, on the other hand, do not govern either start/finish time of any activity or the project end time. Accordingly, non-critical constraints are redundant and can be removed from the constraint collection without causing any change to the schedule solution. The method proposed was applied to a illustrative case example based on the construction of the main entrance of a nursing house for further interpretation. The proposed classification scheme could shed light on a more in-depth understanding of the nature of criticality and the role of constraints in a schedule, and thus better schedule management may be achieved.

  17. Bayesian Optimisation Algorithm for Nurse Scheduling

    CERN Document Server

    Li, Jingpeng

    2008-01-01

    Our research has shown that schedules can be built mimicking a human scheduler by using a set of rules that involve domain knowledge. This chapter presents a Bayesian Optimization Algorithm (BOA) for the nurse scheduling problem that chooses such suitable scheduling rules from a set for each nurses assignment. Based on the idea of using probabilistic models, the BOA builds a Bayesian network for the set of promising solutions and samples these networks to generate new candidate solutions. Computational results from 52 real data instances demonstrate the success of this approach. It is also suggested that the learning mechanism in the proposed algorithm may be suitable for other scheduling problems.

  18. Constructed Wetlands

    Science.gov (United States)

    these systems can improve water quality, engineers and scientists construct systems that replicate the functions of natural wetlands. Constructed wetlands are treatment systems that use natural processes

  19. Exploiting Dynamic Workload Variation in Low Energy Preemptive Task Scheduling

    CERN Document Server

    Leung, Lap-Fai; Hu, Xiaobo Sharon

    2011-01-01

    A novel energy reduction strategy to maximally exploit the dynamic workload variation is proposed for the offline voltage scheduling of preemptive systems. The idea is to construct a fully-preemptive schedule that leads to minimum energy consumption when the tasks take on approximately the average execution cycles yet still guarantees no deadline violation during the worst-case scenario. End-time for each sub-instance of the tasks obtained from the schedule is used for the on-line dynamic voltage scaling (DVS) of the tasks. For the tasks that normally require a small number of cycles but occasionally a large number of cycles to complete, such a schedule provides more opportunities for slack utilization and hence results in larger energy saving. The concept is realized by formulating the problem as a Non-Linear Programming (NLP) optimization problem. Experimental results show that, by using the proposed scheme, the total energy consumption at runtime is reduced by as high as 60% for randomly generated task set...

  20. Multi-Level Round-Robin Multicast Scheduling with Look-Ahead Mechanism

    DEFF Research Database (Denmark)

    Yu, Hao; Ruepp, Sarah Renée; Berger, Michael Stübert

    2011-01-01

    In this paper, we propose a multi-level round-robin multicast scheduling (MLRRMS) algorithm with look-ahead (LA) mechanism for N×N input-queued switches. Fan-out splitting is applied, where a multicast cell can be transferred to all its destinations over any number of cell times. The scheduler...... constructs the Traffic Matrix before each cell transmission based on the fan-out vectors of the cells in the queues. A scheduling pointer independently moves on each column of the Traffic Matrix in a round-robin fashion and returns the decision to the Decision Matrix. The sync procedure is carried out...

  1. Simulating the LSST OCS for conducting survey simulations using the LSST scheduler

    Science.gov (United States)

    Reuter, Michael A.; Cook, Kem H.; Delgado, Francisco; Petry, Catherine E.; Ridgway, Stephen T.

    2016-08-01

    The Operations Simulator was used to prototype the Large Synoptic Survey Telescope (LSST) Scheduler. Currently, the Scheduler is being developed separately to interface with the LSST Observatory Control System (OCS). A new Simulator is under concurrent development to adjust to this new architecture. This requires a package simulating enough of the OCS to allow execution of realistic schedules. This new package is called the Simulated OCS (SOCS). In this paper we detail the SOCS construction plan, package structure, LSST communication middleware platform use, provide some interesting use cases that the separated architecture allows and the software engineering practices used in development.

  2. Hybrid scheduling model and analysis of performance for switched industrial Ethernet

    Institute of Scientific and Technical Information of China (English)

    HU Chun-hua; WU Min; LIU Guo-ping; WANG Si-chun

    2007-01-01

    The fact that outburst traffic in industrial Ethernet was focused on that would bring self-similar phenomenon leading to the delay increase of the cyclical data, and a hybrid priority queue schedule model was proposed in which the outburst data was given the highest priority. Some properties of the self-similar outburst data were proved by network calculus, and its service curve scheduled by the switch was gained. And then the performance of the scheduling algorithm was obtained. The simulation results are close to those calculated by using network calculus model. Some results are of actual significance to the construction of switched industrial Ethernet.

  3. Simplified Scheduling for Underwater Acoustic Networks

    Directory of Open Access Journals (Sweden)

    Wouter van Kleunen

    2013-01-01

    Full Text Available The acoustic propagation speed under water poses significant challenges to the design of underwater sensor networks and their medium access control protocols. Similar to the air, scheduling transmissions under water has significant impact on throughput, energy consumption, and reliability. In this paper we present an extended set of simplified scheduling constraints which allows easy scheduling of underwater acoustic communication. We also present two algorithms for scheduling communications, i.e. a centralized scheduling approach and a distributed scheduling approach. The centralized approach achieves the highest throughput while the distributed approach aims to minimize the computation and communication overhead. We further show how the centralized scheduling approach can be extended with transmission dependencies to reduce the end-to-end delay of packets. We evaluate the performance of the centralized and distributed scheduling approaches using simulation. The centralized approach outperforms the distributed approach in terms of throughput, however we also show the distributed approach has significant benefits in terms of communication and computational overhead required to setup the schedule. We propose a novel way of estimating the performance of scheduling approaches using the ratio of modulation time and propagation delay. We show the performance is largely dictated by this ratio, although the number of links to be scheduled also has a minor impact on the performance.

  4. Construction execution and techology optimization – commercial and business building case study

    OpenAIRE

    Kumalić, Emir

    2010-01-01

    The key element for successful construction site is time-schedule, which allows us time organizing of construction site itself and reliable evaluation of construction course. In my work I discuss organization of construction site and construction technology, with emphasis on optimization of time-schedule. I applied it on the case of commercial-business object, which will be built in Ljubljana. After introduction, I have described this object further I described work technology and preparatory...

  5. Reactive Scheduling in Multipurpose Batch Plants

    Science.gov (United States)

    Narayani, A.; Shaik, Munawar A.

    2010-10-01

    Scheduling is an important operation in process industries for improving resource utilization resulting in direct economic benefits. It has a two-fold objective of fulfilling customer orders within the specified time as well as maximizing the plant profit. Unexpected disturbances such as machine breakdown, arrival of rush orders and cancellation of orders affect the schedule of the plant. Reactive scheduling is generation of a new schedule which has minimum deviation from the original schedule in spite of the occurrence of unexpected events in the plant operation. Recently, Shaik & Floudas (2009) proposed a novel unified model for short-term scheduling of multipurpose batch plants using unit-specific event-based continuous time representation. In this paper, we extend the model of Shaik & Floudas (2009) to handle reactive scheduling.

  6. Routine environmental monitoring schedule, calendar year 1995

    Energy Technology Data Exchange (ETDEWEB)

    Schmidt, J.W.; Markes, B.M.; McKinney, S.M.

    1994-12-01

    This document provides Bechtel Hanford, Inc. (BHI) and Westinghouse Hanford Company (WHC) a schedule of monitoring and sampling routines for the Operational Environmental Monitoring (OEM) program during calendar year (CY) 1995. Every attempt will be made to consistently follow this schedule; any deviation from this schedule will be documented by an internal memorandum (DSI) explaining the reason for the deviation. The DSI will be issued by the scheduled performing organization and directed to Near-Field Monitoring. The survey frequencies for particular sites are determined by the technical judgment of Near-Field Monitoring and may depend on the site history, radiological status, use and general conditions. Additional surveys may be requested at irregular frequencies if conditions warrant. All radioactive wastes sites are scheduled to be surveyed at least annually. Any newly discovered wastes sites not documented by this schedule will be included in the revised schedule for CY 1995.

  7. Robust and Flexible Scheduling with Evolutionary Computation

    DEFF Research Database (Denmark)

    Jensen, Mikkel T.

    (schedules expected to perform well after some degree of modification when the environment changes). This thesis presents two fundamentally different approaches for scheduling job shops facing machine breakdowns. The first method is called neighbourhood based robustness and is based on an idea of minimising...... environments include machine breakdowns, uncertain processing times, workers getting sick, materials being delayed and the appearance of new jobs. These possible environmental changes mean that a schedule which was optimal for the information available at the time of scheduling can end up being highly...... suboptimal when it is implemented and subjected to the uncertainty of the real world. For this reason it is very important to find methods capable of creating robust schedules (schedules expected to perform well after a minimal amount of modification when the environment changes) or flexible schedules...

  8. An investigation on impacts of scheduling configurations on Mississippi biology subject area testing

    Science.gov (United States)

    Marchette, Frances Lenora

    The purpose of this mixed modal study was to compare the results of Biology Subject Area mean scores of students on a 4 x 4 block schedule, A/B block schedule, and traditional year-long schedule for 1A to 5A size schools. This study also reviewed the data to determine if minority or gender issues might influence the test results. Interviews with administrators and teachers were conducted about the type of schedule configuration they use and the influence that the schedule has on student academic performance on the Biology Subject Area Test. Additionally, this research further explored whether schedule configurations allow sufficient time for students to construct knowledge. This study is important to schools, teachers, and administrators because it can assist them in considering the impacts that different types of class schedules have on student performance and if ethnic or gender issues are influencing testing results. This study used the causal-comparative method for the quantitative portion of the study and constant comparative method for the qualitative portion to explore the relationship of school schedules on student academic achievement on the Mississippi Biology Subject Area Test. The aggregate means of selected student scores indicate that the Mississippi Biology Subject Area Test as a measure of student performance reveals no significant difference on student achievement for the three school schedule configurations. The data were adjusted for initial differences of gender, minority, and school size on the three schedule configurations. The results suggest that schools may employ various schedule configurations and expect student performance on the Mississippi Biology Subject Area Test to be unaffected. However, many areas of concern were identified in the interviews that might impact on school learning environments. These concerns relate to effective classroom management, the active involvement of students in learning, the adequacy of teacher education

  9. The Vessel Schedule Recovery Problem

    DEFF Research Database (Denmark)

    Brouer, Berit Dangaard; Plum, Christian Edinger Munk; Vaaben, Bo;

    Maritime transportation is the backbone of world trade and is accountable for around 3% of the worlds CO2 emissions. We present the Vessel Schedule Recovery Problem (VSRP) to evaluate a given disruption scenario and to select a recovery action balancing the trade off between increased bunker cons...... consumption and the impact on the remaining network and the customer service level. The model is applied to 4 real cases from Maersk Line. Solutions are comparable or superior to those chosen by operations managers. Cost savings of up to 58% may be achieved....

  10. Scheduling of an aircraft fleet

    Science.gov (United States)

    Paltrinieri, Massimo; Momigliano, Alberto; Torquati, Franco

    1992-01-01

    Scheduling is the task of assigning resources to operations. When the resources are mobile vehicles, they describe routes through the served stations. To emphasize such aspect, this problem is usually referred to as the routing problem. In particular, if vehicles are aircraft and stations are airports, the problem is known as aircraft routing. This paper describes the solution to such a problem developed in OMAR (Operative Management of Aircraft Routing), a system implemented by Bull HN for Alitalia. In our approach, aircraft routing is viewed as a Constraint Satisfaction Problem. The solving strategy combines network consistency and tree search techniques.

  11. Trajectory Scheduling Methods for minimizing total tardiness in a flowshop

    Directory of Open Access Journals (Sweden)

    Xiaoping Li

    2015-12-01

    Full Text Available In this paper, Trajectory Scheduling Methods (TSMs are proposed for the permutation flowshop scheduling problem with total tardiness minimization criterion. TSMs belong to an iterative local search framework, in which local search is performed on an initial solution, a perturbation operator is deployed to improve diversification, and a restart point mechanism is used to select the new start point of another cycle. In terms of the insertion and swap neighborhood structures, six composite heuristics are introduced, which exploit the search space with a strong intensification effect. Based on purely insertion-based or swap-based perturbation structures, three compound perturbation structures are developed that construct a candidate restart point set rather than just a single restart point. The distance between the current best solution and each start point of the set is defined, according to which the diversification effect of TSMs can be boosted by choosing the most appropriate restart point for the next iteration. A total of 18 trajectory scheduling methods are constructed by different combinations of composite heuristics. Both the best and worst combinations are compared with three best existing sequential meta-heuristics for the considered problem on 540 benchmark instances. Experimental results show that the proposed heuristics significantly outperform the three best existing algorithms within the same computation time.

  12. Multiresolution Network Temporal and Spatial Scheduling Model of Scenic Spot

    Directory of Open Access Journals (Sweden)

    Peng Ge

    2013-01-01

    Full Text Available Tourism is one of pillar industries of the world economy. Low-carbon tourism will be the mainstream direction of the scenic spots' development, and the ω path of low-carbon tourism development is to develop economy and protect environment simultaneously. However, as the tourists' quantity is increasing, the loads of scenic spots are out of control. And the instantaneous overload in some spots caused the image phenomenon of full capacity of the whole scenic spot. Therefore, realizing the real-time schedule becomes the primary purpose of scenic spot’s management. This paper divides the tourism distribution system into several logically related subsystems and constructs a temporal and spatial multiresolution network scheduling model according to the regularity of scenic spots’ overload phenomenon in time and space. It also defines dynamic distribution probability and equivalent dynamic demand to realize the real-time prediction. We define gravitational function between fields and takes it as the utility of schedule, after resolving the transportation model of each resolution, it achieves hierarchical balance between demand and capacity of the system. The last part of the paper analyzes the time complexity of constructing a multiresolution distribution system.

  13. 46 CFR 520.2 - Definitions.

    Science.gov (United States)

    2010-10-01

    ..., administered by the U.S. Customs Service for the U.S. International Trade Commission, and Schedule B... to the transportation of materials and equipment to be employed in the construction or development of... date or within a defined time frame. Retrieval means the process by which a person accesses a...

  14. 30 CFR 707.5 - Definitions.

    Science.gov (United States)

    2010-07-01

    ... FOR COAL EXTRACTION INCIDENT TO GOVERNMENT-FINANCED HIGHWAY OR OTHER CONSTRUCTION § 707.5 Definitions. As used in this part, the following terms have the specified meaning: Extraction of coal as an incidental part means the extraction of coal which is necessary to enable the construction to be accomplished...

  15. Construction management

    CERN Document Server

    Pellicer, Eugenio; Teixeira, José C; Moura, Helder P; Catalá, Joaquín

    2014-01-01

    The management of construction projects is a wide ranging and challenging discipline in an increasingly international industry, facing continual challenges and demands for improvements in safety, in quality and cost control, and in the avoidance of contractual disputes. Construction Management grew out of a Leonardo da Vinci project to develop a series of Common Learning Outcomes for European Managers in Construction. Financed by the European Union, the project aimed to develop a library of basic materials for developing construction management skills for use in a pan-European context. Focused exclusively on the management of the construction phase of a building project from the contractor's point of view, Construction Management covers the complete range of topics of which mastery is required by the construction management professional for the effective delivery of new construction projects. With the continued internationalisation of the construction industry, Construction Management will be required rea...

  16. Construction Simulation and Real-Time Control for High Arch Dam

    Institute of Scientific and Technical Information of China (English)

    ZHONG Denghua; REN Bingyu; WU Kangxin

    2008-01-01

    A method of combining dynamic simulation with real-time control was proposed to fit the randomness and uncertainty in the high arch dam construction process. The mathematical logic model of high arch dam construction process was established. By combining dynamic con-struction simulation with schedule analysis, the process of construction schedule forecasting and analysis based on dynamic simulation was studied. The process of real-time schedule control was constructed and some measures for dynamic adjustment and control of construction schedule were provided. A system developed with the method is utilized in a being constructed hydroelectric pro-ject located at the Yellow River in northwest China, which can make the pouring plan of the dam in the next stage (a month, cluarter or year) to guide the practical construction. The application result shows that the system provides an effective technical support for the construction and manage-ment of the dam.

  17. Environmental surveillance master sampling schedule

    Energy Technology Data Exchange (ETDEWEB)

    Bisping, L.E.

    1994-02-01

    This document contains the planned 1994 schedules for routine collection of samples for the Surface Environmental Surveillance Project (SESP), Drinking Water Project, and Ground-Water Surveillance Project. Samples are routinely collected for the SESP and analyzed to determine the quality of air, surface water, soil, sediment, wildlife, vegetation, foodstuffs, and farm products at Hanford Site and surrounding communities. The responsibility for monitoring the onsite drinking water falls outside the scope of the SESP. The Hanford Environmental Health Foundation is responsible for monitoring the nonradiological parameters as defined in the National Drinking Water Standards while PNL conducts the radiological monitoring of the onsite drinking water. PNL conducts the drinking water monitoring project concurrent with the SESP to promote efficiency and consistency, utilize the expertise developed over the years, and reduce costs associated with management, procedure development, data management, quality control and reporting. The ground-water sampling schedule identifies ground-water sampling events used by PNL for environmental surveillance of the Hanford Site.

  18. Steps Toward Optimal Competitive Scheduling

    Science.gov (United States)

    Frank, Jeremy; Crawford, James; Khatib, Lina; Brafman, Ronen

    2006-01-01

    This paper is concerned with the problem of allocating a unit capacity resource to multiple users within a pre-defined time period. The resource is indivisible, so that at most one user can use it at each time instance. However, different users may use it at different times. The users have independent, se@sh preferences for when and for how long they are allocated this resource. Thus, they value different resource access durations differently, and they value different time slots differently. We seek an optimal allocation schedule for this resource. This problem arises in many institutional settings where, e.g., different departments, agencies, or personal, compete for a single resource. We are particularly motivated by the problem of scheduling NASA's Deep Space Satellite Network (DSN) among different users within NASA. Access to DSN is needed for transmitting data from various space missions to Earth. Each mission has different needs for DSN time, depending on satellite and planetary orbits. Typically, the DSN is over-subscribed, in that not all missions will be allocated as much time as they want. This leads to various inefficiencies - missions spend much time and resource lobbying for their time, often exaggerating their needs. NASA, on the other hand, would like to make optimal use of this resource, ensuring that the good for NASA is maximized. This raises the thorny problem of how to measure the utility to NASA of each allocation. In the typical case, it is difficult for the central agency, NASA in our case, to assess the value of each interval to each user - this is really only known to the users who understand their needs. Thus, our problem is more precisely formulated as follows: find an allocation schedule for the resource that maximizes the sum of users preferences, when the preference values are private information of the users. We bypass this problem by making the assumptions that one can assign money to customers. This assumption is reasonable; a

  19. VERTICAL LINEAR PROJECT SCHEDULING FOR HIGH-RISE BUILDINGS

    Directory of Open Access Journals (Sweden)

    İlker ÖZDEMİR

    1999-02-01

    Full Text Available In this paper, an application to high-rise buildings of VPM (Vertical Production Method and an example will be given which is composition of two distinct and preferable methods are CPM (Critical Path Method that is prefering against traditional Bar-Charts or schedules especially in big and costly investments and LOB (Line of Balance technique that is suitable for using in linear project planning. Thus, it could be expected that to show the way of the method to designer and manufacturer about subjects which are activity, priority and sequencing of high-rise project, speeds of activity and construction, completion times, to add or take out some terms to schedule at the state of project changing.

  20. Improved health-related quality of life of patients with metastatic renal cell carcinoma treated with a 2 weeks on and 1 week off schedule of sunitinib.

    Science.gov (United States)

    Miyake, Hideaki; Harada, Ken-ichi; Miyazaki, Akira; Fujisawa, Masato

    2015-03-01

    The objective of this study was to investigate the significance of changes from the standard dosing schedule of sunitinib, which is 4 weeks of treatment and 2 weeks off (schedule 4/2), to an alternative schedule with 2 weeks of treatment and 1 week off (schedule 2/1), after encountering dose-limiting toxicity in 45 consecutive Japanese patients with metastatic renal cell carcinoma (mRCC). Despite a definitively improved relative dose intensity of sunitinib by changing from schedule 4/2 to 2/1, this difference was not significant. Adverse events (AEs) occurred in all patients on both schedules 4/2 and 2/1; however, the proportion of patients experiencing AEs ≥ grade 3 on schedule 2/1 was significantly lower than that on schedule 4/2. Quality of life (QOL) analysis using SF-36 revealed that all eight scores during schedule 2/1 were more favorable than those during schedule 4/2, and there were significant differences in 2 of the 8 scores between these two schedules. Furthermore, multivariate analyses, which were performed to evaluate the contribution of several AEs on schedule 2/1 to the improvement of each score in SF-36, revealed that fatigue had independent impacts on two scores, despite the lack of an independent association between any scores and the remaining AEs examined. These findings suggest that schedule 2/1 is the optimal dosing schedule of sunitinib against mRCC that balances efficacy and toxicity, since treatment on schedule 2/1 resulted in a markedly improved QOL compared with that on schedule 4/2 by relieving the profile of sunitinib-related AEs.

  1. Minimally disruptive schedule repair for MCM missions

    Science.gov (United States)

    Molineaux, Matthew; Auslander, Bryan; Moore, Philip G.; Gupta, Kalyan M.

    2015-05-01

    Mine countermeasures (MCM) missions entail planning and operations in very dynamic and uncertain operating environments, which pose considerable risk to personnel and equipment. Frequent schedule repairs are needed that consider the latest operating conditions to keep mission on target. Presently no decision support tools are available for the challenging task of MCM mission rescheduling. To address this capability gap, we have developed the CARPE system to assist operation planners. CARPE constantly monitors the operational environment for changes and recommends alternative repaired schedules in response. It includes a novel schedule repair algorithm called Case-Based Local Schedule Repair (CLOSR) that automatically repairs broken schedules while satisfying the requirement of minimal operational disruption. It uses a case-based approach to represent repair strategies and apply them to new situations. Evaluation of CLOSR on simulated MCM operations demonstrates the effectiveness of case-based strategy. Schedule repairs are generated rapidly, ensure the elimination of all mines, and achieve required levels of clearance.

  2. Greedy Maximal Scheduling in Wireless Networks

    CERN Document Server

    Li, Qiao

    2010-01-01

    In this paper we consider greedy scheduling algorithms in wireless networks, i.e., the schedules are computed by adding links greedily based on some priority vector. Two special cases are considered: 1) Longest Queue First (LQF) scheduling, where the priorities are computed using queue lengths, and 2) Static Priority (SP) scheduling, where the priorities are pre-assigned. We first propose a closed-form lower bound stability region for LQF scheduling, and discuss the tightness result in some scenarios. We then propose an lower bound stability region for SP scheduling with multiple priority vectors, as well as a heuristic priority assignment algorithm, which is related to the well-known Expectation-Maximization (EM) algorithm. The performance gain of the proposed heuristic algorithm is finally confirmed by simulations.

  3. Fair Scheduling in Networks Through Packet Election

    CERN Document Server

    Jagabathula, Srikanth

    2008-01-01

    We consider the problem of designing a fair scheduling algorithm for discrete-time constrained queuing networks. Each queue has dedicated exogenous packet arrivals. There are constraints on which queues can be served simultaneously. This model effectively describes important special instances like network switches, interference in wireless networks, bandwidth sharing for congestion control and traffic scheduling in road roundabouts. Fair scheduling is required because it provides isolation to different traffic flows; isolation makes the system more robust and enables providing quality of service. Existing work on fairness for constrained networks concentrates on flow based fairness. As a main result, we describe a notion of packet based fairness by establishing an analogy with the ranked election problem: packets are voters, schedules are candidates and each packet ranks the schedules based on its priorities. We then obtain a scheduling algorithm that achieves the described notion of fairness by drawing upon ...

  4. On Intelligent Systems of the Data Acquisition in the Schedule Risk Analysis

    Institute of Scientific and Technical Information of China (English)

    ZhongxiangChen; ChaoyuanYue

    2004-01-01

    It is an important task to analyze the schedule risk in a project management.As a semi-constructed or non-constructed complex system, there are many difficulties in the quantitative analysis of the schedule risk (SRA). The paper integrates intelligent techniques to obtain massive basic data required in the risk analysis process. It greatly improves the precision and efficiency of the SRA. In addition, the paper presents a mechanism and architecture of the integrated intelligent systems. Finally, the concluding remarks are provided for basic data acquisition in the SRA.

  5. Two-Dimensional Scheduling: A Review

    Directory of Open Access Journals (Sweden)

    Zhuolei Xiao

    2013-07-01

    Full Text Available In this study, we present a literature review, classification schemes and analysis of methodology for scheduling problems on Batch Processing machine (BP with both processing time and job size constraints which is also regarded as Two-Dimensional (TD scheduling. Special attention is given to scheduling problems with non-identical job sizes and processing times, with details of the basic algorithms and other significant results.

  6. Spent nuclear fuel project integrated schedule plan

    Energy Technology Data Exchange (ETDEWEB)

    Squires, K.G.

    1995-03-06

    The Spent Nuclear Fuel Integrated Schedule Plan establishes the organizational responsibilities, rules for developing, maintain and status of the SNF integrated schedule, and an implementation plan for the integrated schedule. The mission of the SNFP on the Hanford site is to provide safe, economic, environmentally sound management of Hanford SNF in a manner which stages it to final disposition. This particularly involves K Basin fuel.

  7. Scheduling and routing Tactical Aerial Reconnaissance Vehicles

    OpenAIRE

    1990-01-01

    Approved for public release; distribution unlimited. In this thesis we study the Marine Corps Tactical Aerial Reconnaissance Vehicle routing and scheduling problem. the present method of routing and scheduling is presented, along with possible implications for routing and scheduling when future expansion of vehicle assets becomes available. A review of current literature is given and comparisons are drawn between our problem and recent work. A model for the problem, which we call the Multi...

  8. Spent nuclear fuel project integrated schedule plan

    Energy Technology Data Exchange (ETDEWEB)

    Squires, K.G.

    1995-03-06

    The Spent Nuclear Fuel Integrated Schedule Plan establishes the organizational responsibilities, rules for developing, maintain and status of the SNF integrated schedule, and an implementation plan for the integrated schedule. The mission of the SNFP on the Hanford site is to provide safe, economic, environmentally sound management of Hanford SNF in a manner which stages it to final disposition. This particularly involves K Basin fuel.

  9. Composite technology of earthwork construction on taliks in cryolithic zones

    Institute of Scientific and Technical Information of China (English)

    Svyatoslav Ya Lutskiy; Taisiya V. Shepitko; Alexander M. Cherkasov

    2013-01-01

    This paper reviews construction and technological solutions for roadbeds in talik areas of permafrost soil, and proposes an integrated technology for prevention and elimination of taliks during construction periods. It also summarizes the expe-rience of process regulation scheduling and soil conditions monitoring during construction.

  10. 7 CFR 4280.115 - Construction planning and performing development.

    Science.gov (United States)

    2010-01-01

    ... expected, and a proposed construction schedule showing the sequence in which the work is to be performed... 7 Agriculture 15 2010-01-01 2010-01-01 false Construction planning and performing development... Construction planning and performing development. The requirements of this section apply for...

  11. Network-Aware HEFT Scheduling for Grid

    Directory of Open Access Journals (Sweden)

    Muhammad Murtaza Yousaf

    2014-01-01

    Full Text Available We present a network-aware HEFT. The original HEFT does not take care of parallel network flows while designing its schedule for a computational environment where computing nodes are physically at distant locations. In the proposed mechanism, such data transfers are stretched to their realistic completion time. A HEFT schedule with stretched data transfers exhibits the realistic makespan of the schedule. It is shown how misleading a schedule can be if the impact of parallel data transfers that share a bottleneck is ignored. A network-aware HEFT can be used to yield a benefit for Grid applications.

  12. GRID SCHEDULING USING ENHANCED ANT COLONY ALGORITHM

    Directory of Open Access Journals (Sweden)

    P. Mathiyalagan

    2010-10-01

    Full Text Available Grid computing is a high performance computing used to solve larger scale computational demands. Task scheduling is a major issue in grid computing systems. Scheduling of tasks is the NP hard problem. The heuristic approach provides optimal solution for NP hard problems .The ant colony algorithm provides optimal solution. The existing ant colony algorithm takes more time to schedule the tasks. In this paper ant colony algorithm improved by enhancing pheromone updating rule such that it schedules the tasks efficiently and better resource utilization. The simulation results prove that proposed method reduces the execution time of tasks compared to existing ant colony algorithm.

  13. 15 CFR 700.14 - Preferential scheduling.

    Science.gov (United States)

    2010-01-01

    ...) BUREAU OF INDUSTRY AND SECURITY, DEPARTMENT OF COMMERCE NATIONAL SECURITY INDUSTRIAL BASE REGULATIONS DEFENSE PRIORITIES AND ALLOCATIONS SYSTEM Industrial Priorities § 700.14 Preferential scheduling. (a) A...

  14. Scheduling By Using Fuzzy Logic in Manufacturing

    Directory of Open Access Journals (Sweden)

    Miss. Ashwini. A. Mate

    2014-07-01

    Full Text Available This paper represents the scheduling process in furniture manufacturing unit. It gives the fuzzy logic application in flexible manufacturing system. Flexible manufacturing systems are production system in furniture manufacturing unit. FMS consist of same multipurpose numerically controlled machines. Here in this project the scheduling has been done in FMS by using fuzzy logic tool in Matlab software. The fuzzy logic based scheduling model in this paper will deals with the job and best alternative route selection with multi-criteria of machine. Here two criteria for job and sequencing and routing with rules. This model is applicable to the scheduling of any manufacturing industry.

  15. Flexible Personnel Scheduling in the Parallel Environment

    Institute of Scientific and Technical Information of China (English)

    XU Ben-zhu; ZHANG Xing-ling

    2014-01-01

    In the view of staff shortages and the huge inventory of products in the current market, we put forward a personnel scheduling model in the target of closing to the delivery date considering the parallelism. Then we designed a scheduling algorithm based on genetic algorithm and proposed a flexible parallel decoding method which take full use of the personal capacity. Case study results indicate that the flexible personnel scheduling considering the order-shop scheduling, machine automatic capabilities and personnel flexible in the target of closing to the delivery date optimize the allocation of human resources, then maximize the efficiency.

  16. CASSIUS: The Cassini Uplink Scheduler

    Science.gov (United States)

    Bellinger, Earl

    2012-01-01

    The Cassini Uplink Scheduler (CASSIUS) is cross-platform software used to generate a radiation sequence plan for commands being sent to the Cassini spacecraft. Because signals must travel through varying amounts of Earth's atmosphere, several different modes of constant telemetry rates have been devised. These modes guarantee that the spacecraft and the Deep Space Network agree with respect to the data transmission rate. However, the memory readout of a command will be lost if it occurs on a telemetry mode boundary. Given a list of spacecraft message files as well as the available telemetry modes, CASSIUS can find an uplink sequence that ensures safe transmission of each file. In addition, it can predict when the two on-board solid state recorders will swap. CASSIUS prevents data corruption by making sure that commands are not planned for memory readout during telemetry rate changes or a solid state recorder swap.

  17. Assessment of the Correlation between Appointment Scheduling and Patient Satisfaction in a Pediatric Dental Setup

    Directory of Open Access Journals (Sweden)

    Amar N. Katre

    2014-01-01

    Full Text Available Introduction. The practice of modern pediatric dentistry requires delivery of quality care in combination with adherence to excellent business as well as time management principles. A definite appointment schedule should be presented to the parents on the first or second appointment. More importantly, the prescribed schedule should be followed to the best of the professional abilities of the pediatric dentist. Aims. The aim of the study was to assess the co-relation between appointment scheduling and patient satisfaction in a pediatric dental setup with the objective of understanding the parameters related to appointment scheduling to increase patient satisfaction. Method. A total of 40 patients, who visited the Department of Pediatric and Preventive Dentistry, YMT Dental College & Hospital, for dental treatment were selected on a random basis. A questionnaire with a set of 6 questions with a rating scale of 1–5 to assess the patient satisfaction related to appointment scheduling was prepared. Results. A significant number of the patients were happy with the existing appointment scheduling system barring a few exceptions.

  18. Assessment of the Correlation between Appointment Scheduling and Patient Satisfaction in a Pediatric Dental Setup

    Science.gov (United States)

    Katre, Amar N.

    2014-01-01

    Introduction. The practice of modern pediatric dentistry requires delivery of quality care in combination with adherence to excellent business as well as time management principles. A definite appointment schedule should be presented to the parents on the first or second appointment. More importantly, the prescribed schedule should be followed to the best of the professional abilities of the pediatric dentist. Aims. The aim of the study was to assess the co-relation between appointment scheduling and patient satisfaction in a pediatric dental setup with the objective of understanding the parameters related to appointment scheduling to increase patient satisfaction. Method. A total of 40 patients, who visited the Department of Pediatric and Preventive Dentistry, YMT Dental College & Hospital, for dental treatment were selected on a random basis. A questionnaire with a set of 6 questions with a rating scale of 1–5 to assess the patient satisfaction related to appointment scheduling was prepared. Results. A significant number of the patients were happy with the existing appointment scheduling system barring a few exceptions. PMID:25610464

  19. Electrochemical construction

    Science.gov (United States)

    Einstein, Harry; Grimes, Patrick G.

    1983-08-23

    An electrochemical cell construction features a novel co-extruded plastic electrode in an interleaved construction with a novel integral separator-spacer. Also featured is a leak and impact resistant construction for preventing the spill of corrosive materials in the event of rupture.

  20. Dosing Schedules for Pneumococcal Conjugate Vaccine

    Science.gov (United States)

    2014-01-01

    Since second generation pneumococcal conjugate vaccines (PCVs) targeting 10 and 13 serotypes became available in 2010, the number of national policy makers considering these vaccines has steadily increased. An important consideration for a national immunization program is the timing and number of doses—the schedule—that will best prevent disease in the population. Data on disease epidemiology and the efficacy or effectiveness of PCV schedules are typically considered when choosing a schedule. Practical concerns, such as the existing vaccine schedule, and vaccine program performance are also important. In low-income countries, pneumococcal disease and deaths typically peak well before the end of the first year of life, making a schedule that provides PCV doses early in life (eg, a 6-, 10- and 14-week schedule) potentially the best option. In other settings, a schedule including a booster dose may address disease that peaks in the second year of life or may be seen to enhance a schedule already in place. A large and growing body of evidence from immunogenicity studies, as well as clinical trials and observational studies of carriage, pneumonia and invasive disease, has been systematically reviewed; these data indicate that schedules of 3 or 4 doses all work well, and that the differences between these regimens are subtle, especially in a mature program in which coverage is high and indirect (herd) effects help enhance protection provided directly by a vaccine schedule. The recent World Health Organization policy statement on PCVs endorsed a schedule of 3 primary doses without a booster or, as a new alternative, 2 primary doses with a booster dose. While 1 schedule may be preferred in a particular setting based on local epidemiology or practical considerations, achieving high coverage with 3 doses is likely more important than the specific timing of doses. PMID:24336059

  1. RECONFIGURABLE PRODUCTION LINE MODELING AND SCHEDULING USING PETRI NETS AND GENETIC ALGORITHM

    Institute of Scientific and Technical Information of China (English)

    XIE Nan; LI Aiping

    2006-01-01

    In response to the production capacity and functionality variations, a genetic algorithm (GA) embedded with deterministic timed Petri nets(DTPN) for reconfigurable production line(RPL) is proposed to solve its scheduling problem. The basic DTPN modules are presented to model the corresponding variable structures in RPL, and then the scheduling model of the whole RPL is constructed. And in the scheduling algorithm, firing sequences of the Petri nets model are used as chromosomes, thus the selection, crossover, and mutation operator do not deal with the elements in the problem space, but the elements of Petri nets model. Accordingly, all the algorithms for GA operations embedded with Petri nets model are proposed. Moreover, the new weighted single-objective optimization based on reconfiguration cost and E/T is used. The results of a DC motor RPL scheduling suggest that the presented DTPN-GA scheduling algorithm has a significant impact on RPL scheduling, and provide obvious improvements over the conventional scheduling method in practice that meets duedate, minimizes reconfiguration cost, and enhances cost effectivity.

  2. Design issues in the semantics and scheduling of asynchronous tasks.

    Energy Technology Data Exchange (ETDEWEB)

    Olivier, Stephen L.

    2013-07-01

    The asynchronous task model serves as a useful vehicle for shared memory parallel programming, particularly on multicore and manycore processors. As adoption of model among programmers has increased, support has emerged for the integration of task parallel language constructs into mainstream programming languages, e.g., C and C++. This paper examines some of the design decisions in Cilk and OpenMP concerning semantics and scheduling of asynchronous tasks with the aim of informing the efforts of committees considering language integration, as well as developers of new task parallel languages and libraries.

  3. Clonal Selection Based Memetic Algorithm for Job Shop Scheduling Problems

    Institute of Scientific and Technical Information of China (English)

    Jin-hui Yang; Liang Sun; Heow Pueh Lee; Yun Qian; Yan-chun Liang

    2008-01-01

    A clonal selection based memetic algorithm is proposed for solving job shop scheduling problems in this paper. In the proposed algorithm, the clonal selection and the local search mechanism are designed to enhance exploration and exploitation. In the clonal selection mechanism, clonal selection, hypermutation and receptor edit theories are presented to construct an evolutionary searching mechanism which is used for exploration. In the local search mechanism, a simulated annealing local search algorithm based on Nowicki and Smutnicki's neighborhood is presented to exploit local optima. The proposed algorithm is examined using some well-known benchmark problems. Numerical results validate the effectiveness of the proposed algorithm.

  4. 75 FR 66195 - Schedules of Controlled Substances: Placement of Propofol Into Schedule IV

    Science.gov (United States)

    2010-10-27

    ... Propofol Into Schedule IV; Proposed Rule #0;#0;Federal Register / Vol. 75, No. 207 / Wednesday, October 27... Schedules of Controlled Substances: Placement of Propofol Into Schedule IV AGENCY: Drug Enforcement... propofol, including its salts, isomers, and salts of isomers whenever the existence of such salts, isomers...

  5. Intergroup Joint Scheduling for Mitigating Asymmetric Uplink Interference in Self-Organizing Virtual Cell Networks

    Directory of Open Access Journals (Sweden)

    Ohyun Jo

    2016-01-01

    Full Text Available We introduce the concept of self-organizing VCN (virtual cell network. Here self-organizing VCN topology for efficient operation will be configured, and the functions of the each element will be defined. Also, the operation scenarios of VCN will be described. Then, we propose an efficient scheduling algorithm that considers the asymmetry of interference between downlink and uplink to mitigate intercell interference with little computing overhead. The basic concept is to construct scheduling groups that consist of several users. Each user in a scheduling group is affiliated with a different cell. Then, the intercell groups are managed efficiently in the proposed VCNs. There is no need for the exchange of a lot of information among base stations to schedule the users over the entire network.

  6. A Hybrid Artificial Neural Network-based Scheduling Knowledge Acquisition Algorithm

    Institute of Scientific and Technical Information of China (English)

    WANG Weida; WANG Wei; LIU Wenjian

    2006-01-01

    It is a key issue that constructing successful knowledge base to satisfy an efficient adaptive scheduling for the complex manufacturing system. Therefore, a hybrid artificial neural network (ANN)-based scheduling knowledge acquisition algorithm is presented in this paper. We combined genetic algorithm (GA) with simulated annealing (SA) to develop a hybrid optimization method, in which GA was introduced to present parallel search architecture and SA was introduced to increase escaping probability from local optima and ability to neighbor search. The hybrid method was utilized to resolve the optimal attributes subset of manufacturing system and determine the optimal topology and parameters of ANN under different scheduling objectives; ANN was used to evaluate the fitness of chromosome in the method and generate the scheduling knowledge after obtaining the optimal attributes subset, optimal ANN's topology and parameters. The experimental results demonstrate that the proposed algorithm produces significant performance improvements over other machine learning-based algorithms.

  7. The Application of Bayesian Optimization and Classifier Systems in Nurse Scheduling

    CERN Document Server

    Li, Jingpeng

    2008-01-01

    Two ideas taken from Bayesian optimization and classifier systems are presented for personnel scheduling based on choosing a suitable scheduling rule from a set for each persons assignment. Unlike our previous work of using genetic algorithms whose learning is implicit, the learning in both approaches is explicit, i.e. we are able to identify building blocks directly. To achieve this target, the Bayesian optimization algorithm builds a Bayesian network of the joint probability distribution of the rules used to construct solutions, while the adapted classifier system assigns each rule a strength value that is constantly updated according to its usefulness in the current situation. Computational results from 52 real data instances of nurse scheduling demonstrate the success of both approaches. It is also suggested that the learning mechanism in the proposed approaches might be suitable for other scheduling problems.

  8. Definitions of oppression.

    Science.gov (United States)

    LeBlanc, R G

    1997-12-01

    How we begin to serve others as healthcare professionals and how it is we define underserved and oppressed peoples is important in understanding issues in the organization and allocation of health care. This exploration, based on feminist post-structuralist theory, explores how nurses formulate definitions of 'underserved' and 'vulnerable'. This study goes beyond prescribed definitions to locate meanings used to identify oppression. I present, through an analysis of a literature search, the context and construction of the terms 'vulnerable population' and 'medically underserved'. Professional nursing journals are the source of relevant text. The implications of working with particular understandings of the terms 'vulnerable' and 'underserved' is based on my assumption that healthcare providers need to critically focus on the personal and political meanings they attribute to the labels used to define the clients and communities with whom they work. The presentation of this material supports that the way we define 'vulnerable' and 'underserved' is related to how our work fighting racism, ageism, AIDS, poverty, homophobia, addiction, domestic violence, sexism and colonization is realized.

  9. 37 CFR 2.85 - Classification schedules.

    Science.gov (United States)

    2010-07-01

    ... 37 Patents, Trademarks, and Copyrights 1 2010-07-01 2010-07-01 false Classification schedules. 2..., DEPARTMENT OF COMMERCE RULES OF PRACTICE IN TRADEMARK CASES Classification § 2.85 Classification schedules. (a) International classification system. Section 6.1 of this chapter sets forth the...

  10. 10 CFR 51.15 - Time schedules.

    Science.gov (United States)

    2010-01-01

    ... REGULATORY FUNCTIONS National Environmental Policy Act-Regulations Implementing Section 102(2) § 51.15 Time... 10 Energy 2 2010-01-01 2010-01-01 false Time schedules. 51.15 Section 51.15 Energy NUCLEAR... NEPA review in accordance with any time schedule established under this section. (b) As specified in...

  11. Robust scheduling in an uncertain environment

    NARCIS (Netherlands)

    Wilson, M.

    2016-01-01

    This thesis presents research on scheduling in an uncertain environment, which forms a part of the rolling stock life cycle logistics applied research and development program funded by Dutch railway industry companies. The focus therefore lies on scheduling of maintenance operations on rolling stock

  12. Crew Scheduling for Netherlands Railways: "destination: customer"

    NARCIS (Netherlands)

    L.G. Kroon (Leo); M. Fischetti (Matteo)

    2000-01-01

    textabstract: In this paper we describe the use of a set covering model with additional constraints for scheduling train drivers and conductors for the Dutch railway operator NS Reizigers. The schedules were generated according to new rules originating from the project "Destination: Customer"

  13. Improved MLWDF scheduler for LTE downlink transmission

    Science.gov (United States)

    Obinna Nnamani, Christantus; Anioke, Chidera Linda; Ikechukwu Ani, Cosmas

    2016-11-01

    In long-term evolution (LTE) downlink transmission, modified least weighted delay first (MLWDF) scheduler is a quality of service (QoS) aware scheduling scheme for real-time (RT) services. Nevertheless, MLWDF performs below optimal among the trade-off between strict delay and loss restraints of RT and non-RT traffic flows, respectively. This is further worsened with the implementation of hybrid automatic retransmission request (HARQ). As these restraints grow unabated with increasing number of user demands, the performance of MLWDF further reduces. In order to ameliorate this situation, there is a need to directly incorporate the variations in user demands and HARQ implementation as parameters to the MLWDF scheduler. In this work, an improvement to the MLWDF scheduler is proposed. The improvement entails adding two novel parameters that characterise user demand and HARQ implementation. The scheduler was tested using varying three classes of service in QoS class identifiers (QCIs) table standardised by Third Generation Partnership Project for LTE network to characterise different services. It was also tested on the basis of packet prioritisation. The proposed scheduler was simulated with LTE-SIM simulator and compared with the MLWDF and proportional fairness schedulers. In terms of delay, throughput and packet loss ratio; the proposed scheduler increased overall system performance.

  14. On green routing and scheduling problem

    CERN Document Server

    Touati, Nora

    2012-01-01

    The vehicle routing and scheduling problem has been studied with much interest within the last four decades. In this paper, some of the existing literature dealing with routing and scheduling problems with environmental issues is reviewed, and a description is provided of the problems that have been investigated and how they are treated using combinatorial optimization tools.

  15. On green routing and scheduling problem

    OpenAIRE

    Touati, Nora; Jost, Vincent

    2011-01-01

    The vehicle routing and scheduling problem has been studied with much interest within the last four decades. In this paper, some of the existing literature dealing with routing and scheduling problems with environmental issues is reviewed, and a description is provided of the problems that have been investigated and how they are treated using combinatorial optimization tools.

  16. 5 CFR 293.511 - Retention schedule.

    Science.gov (United States)

    2010-01-01

    ... RECORDS Employee Medical File System Records § 293.511 Retention schedule. (a) Temporary EMFS records must... accordance with General Records Schedule (GRS) 1, item 21, issued by the National Archives and Records Administration (NARA). (b) Occupational Medical Records considered to be long-term records must be maintained...

  17. Scheduling Network Traffic for Grid Purposes

    DEFF Research Database (Denmark)

    Gamst, Mette

    This thesis concerns scheduling of network traffic in grid context. Grid computing consists of a number of geographically distributed computers, which work together for solving large problems. The computers are connected through a network. When scheduling job execution in grid computing, data...

  18. Downlink Scheduling in Long Term Evolution

    Directory of Open Access Journals (Sweden)

    Anwar Hossain

    2015-06-01

    Full Text Available This is an investigated research article on resource block scheduling of Long Term Evolution (LTE. LTE is one of the evolutions of the Universal Mobile Telecommunication System (UMTS. It provides internet access to mobile users through smart phone, laptop and other android devices. LTE offers a high speed data and multimedia services. It supports data rates up to 100 Mbps in the downlink and 50 Mbps in the uplink transmission. Our research investigation was aim to the downlink scheduling. We have considered The Best CQI scheduling algorithm and the Round Robin scheduling algorithm. The implementation, analysis and comparison of these scheduling algorithms have been performed through MATLAB simulator. We have analyzed the impact of the scheduling schemes on the throughput and the fairness of both scheduling schemes. Here we have proposed a new scheduling algorithm that achieves a compromise between the throughput and the fairness. Orthogonal Frequency Division Multiplexing (OFDM has been adopted as the downlink transmission scheme. We have considered the impact of the channel delay on the throughput. In addition, MIMO transceiver systems have been implemented to increase the throughput

  19. Scheduling in high performance buffered crossbar switches

    NARCIS (Netherlands)

    Mhamdi, L.

    2007-01-01

    High performance routers are the basic building blocks of the Internet. Most high performance routers built today use crossbars and a centralized scheduler. Due to their high scheduling complexity, crossbar-based routers are not scalable and cannot keep pace with the explosive growth of the Internet

  20. Scheduling parameters in flexible manufacturing cells

    NARCIS (Netherlands)

    Slomp, J.; Gaalman, G.J.C.; Ahmad, M.M.; Sullivan, W.G.; Migliore, H.; Randhawa, S.

    1998-01-01

    The existence of a well-designed scheduling procedure is a major condition for an effective integration of a flexible manufacturing cell (FMC) in the material flow of a firm. This paper shows the presence and relative importance of three parameter types in the scheduling of operations on a flexible

  1. Scheduling parameters in flexible manufacturing cells

    NARCIS (Netherlands)

    Slomp, J.; Gaalman, G.J.C.; Ahmad, M.M.; Sullivan, W.G.; Migliore, H.; Randhawa, S.

    1998-01-01

    The existence of a well-designed scheduling procedure is a major condition for an effective integration of a flexible manufacturing cell (FMC) in the material flow of a firm. This paper shows the presence and relative importance of three parameter types in the scheduling of operations on a flexible

  2. Schedule-extended synchronous dataflow graphs

    NARCIS (Netherlands)

    Damavandpeyma, M.; Stuijk, S.; Basten, T.; Geilen, M.; Corporaal, H.

    2013-01-01

    Synchronous dataflow graphs (SDFGs) are used extensively to model streaming applications. An SDFG can be extended with scheduling decisions, allowing SDFG analysis to obtain properties, such as throughput or buffer sizes for the scheduled graphs. Analysis times depend strongly on the size of the

  3. Optimization of Hierarchically Scheduled Heterogeneous Embedded Systems

    DEFF Research Database (Denmark)

    Pop, Traian; Pop, Paul; Eles, Petru;

    2005-01-01

    We present an approach to the analysis and optimization of heterogeneous distributed embedded systems. The systems are heterogeneous not only in terms of hardware components, but also in terms of communication protocols and scheduling policies. When several scheduling policies share a resource...

  4. A question of matching rather than scheduling

    NARCIS (Netherlands)

    van de Velde, S.L.

    1995-01-01

    Proper scheduling maintenance for Air Force C-130 aircraft involves the prevention of mismatches concerning the availability of the aircraft and a new wing kit which would prolong its use. Scheduling maintenance problems include the designation of wing kits in the production sequence to match for a

  5. Unrelated Machine Scheduling with Stochastic Processing Times

    NARCIS (Netherlands)

    Skutella, Martin; Sviridenko, Maxim; Uetz, Marc

    2016-01-01

    Two important characteristics encountered in many real-world scheduling problems are heterogeneous processors and a certain degree of uncertainty about the processing times of jobs. In this paper we address both, and study for the first time a scheduling problem that combines the classical unrelated

  6. Unrelated Machine Scheduling with Stochastic Processing Times

    NARCIS (Netherlands)

    Skutella, Martin; Sviridenko, Maxim; Uetz, Marc Jochen

    Two important characteristics encountered in many real-world scheduling problems are heterogeneous processors and a certain degree of uncertainty about the processing times of jobs. In this paper we address both, and study for the first time a scheduling problem that combines the classical unrelated

  7. Machine scheduling with resource dependent processing times

    NARCIS (Netherlands)

    Grigoriev, A.; Sviridenko, M.; Uetz, Marc Jochen

    We consider machine scheduling on unrelated parallel machines with the objective to minimize the schedule makespan. We assume that, in addition to its machine dependence, the processing time of any job is dependent on the usage of a discrete renewable resource, e.g. workers. A given amount of that

  8. Dishabituation Produces Interactions during Multiple Schedules

    Science.gov (United States)

    McSweeney, Frances K.; Kowal, Benjamin P.; Murphy, Eric S.; Isava, Duane M.

    2004-01-01

    McSweeney and Weatherly (1998) argued that differential habituation to the reinforcer contributes to the behavioral interactions observed during multiple schedules. The present experiment confirmed that introducing dishabituators into one component of a multiple schedule increases response rate in the other, constant, component. During baseline,…

  9. Scheduling identical jobs on uniform parallel machines

    NARCIS (Netherlands)

    M. Dessouky (Mohamed); B. Lageweg (Ben); J.K. Lenstra; S.L. van de Velde (Steef)

    1990-01-01

    textabstractWe address the problem of scheduling n identical jobs on m uniform parallel machines to optimize scheduling criteria that are nondecreasing in the job completion times. It is well known that this can be formulated as a linear assignment problem, and subsequently solved in O(n3) time. We

  10. Agent-based scheduling for aircraft deicing

    NARCIS (Netherlands)

    Mao, X.; Ter Mors, A.W.; Roos, N.; Witteveen, C.

    2006-01-01

    The planning and scheduling of the deicing and anti-icing activities is an important and challenging part of airport departure planning. Deicing planning has to be done in a highly dynamic environment involving several autonomous and self-interested parties. Traditional centralized scheduling approa

  11. Shaping Academic Task Engagement with Percentile Schedules

    Science.gov (United States)

    Athens, Elizabeth S.; Vollmer, Timothy R.; St. Peter Pipkin, Claire C.

    2007-01-01

    The purpose of this study was to examine the use of percentile schedules as a method of quantifying the shaping procedure in an educational setting. We compared duration of task engagement during baseline measurements for 4 students to duration of task engagement during a percentile schedule. As a secondary purpose, we examined the influence on…

  12. 40 CFR 716.60 - Reporting schedule.

    Science.gov (United States)

    2010-07-01

    ... 40 Protection of Environment 30 2010-07-01 2010-07-01 false Reporting schedule. 716.60 Section 716.60 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) TOXIC SUBSTANCES CONTROL ACT HEALTH AND SAFETY DATA REPORTING General Provisions § 716.60 Reporting schedule. (a) General requirements...

  13. State Teacher Salary Schedules. Policy Analysis

    Science.gov (United States)

    Griffith, Michael

    2016-01-01

    In the United States most teacher compensation issues are decided at the school district level. However, a group of states have chosen to play a role in teacher pay decisions by instituting statewide teacher salary schedules. Education Commission of the States has found that 17 states currently make use of teacher salary schedules. This education…

  14. A3 TEST STAND CONSTRUCTION

    Science.gov (United States)

    2008-01-01

    THIS IMAGE SHOWS THE DEVELOPMENT AND CONSTRUCTION OF THE A3 TEST STAND IN SUPPORT OF THE ARES/CLV UPPER STAGE ENGINE AT STENNIS SPACE CENTER, MISSISSIPPI. THIS IMAGE IS EXTRACTED FROM A HIGH DEFINITION VIDEO FILE AND IS THE HIGHEST RESOLUTION AVAILABLE.

  15. A3 TEST STAND CONSTRUCTION

    Science.gov (United States)

    2008-01-01

    THIS IMAGE SHOWS THE DEVELOPMENT AND CONSTRUCTION OF THE A3 TEST STAND IN SUPPORT OF THE ARES/CLV UPPER STAGE ENGINE AT STENNIS SPACE CENTER, MISSISSIPPI. THIS IMAGE IS EXTRACTED FROM A HIGH DEFINITION VIDEO FILE AND IS THE HIGHEST RESOLUTION AVAILABLE.

  16. A Cuckoo Search Algorithm for Scheduling Multiskilled Workforce

    Directory of Open Access Journals (Sweden)

    Hui Nie

    2014-05-01

    Full Text Available Based on the situation of the construction and software industry, this paper presents a multi-skilled human resource scheduling model which considers the skill and the salary of the workforce at different levels. It introduces a novel cuckoo search (CS-based approach to optimize the objective function which combines the minimization of the makespan and the project cost. The proposed approach takes the priority coding scheme to code for each job, and adopts the serial schedule generation scheme to sequentially allocate the start time and resources for one job with highest priority at a time. To match the discrete nature of the solution, the Lévy flight operator of CS algorithm, which is originally suitable for continuous variable, has been modified. The CS-based approach has been implemented by using MATLAB R2010b and tested by a project taken from the literature, which contains 18 jobs and 6 multi-skilled workers. The results yielded by the CS-based approach have been found to significantly outperform genetic algorithm. This demonstrates that the cuckoo search algorithm based approach is suitable for scheduling the complicated resource constrained project with multi-skilled workforces

  17. Garbage Collection Scheduling of Aperiodic Tasks

    Institute of Scientific and Technical Information of China (English)

    Ning Zhang; Guang-Ze Xiong

    2009-01-01

    In the previous work of garbage collection (GC) models, scheduling analysis was given based on an assumption that there were no aperiodic mutator tasks. However, it is not true in practical real-time systems. The GC algorithm which can schedule aperiodic tasks is proposed, and the variance of live memory is analyzed. In this algorithm, active tasks are deferred to be processed by GC until the states of tasks become inactive, and the saved sporadic server time can be used to schedule aperiodic tasks. Scheduling the sample task sets demonstrates that this algorithm in this paper can schedule aperiodic tasks and decrease GC work. Thus, the GC algorithm proposed is more flexible and portable.

  18. Human choice under schedules of negative reinforcement.

    Science.gov (United States)

    Alessandri, Jérôme; Cançado, Carlos R X

    2015-12-01

    The generalized matching equation provides a good description of response allocation in concurrent schedules of positive reinforcement in nonhumans as well as in humans. The present experiment was conducted to further investigate the allocation of responding under concurrent schedules of negative reinforcement (i.e., timeouts from pressing a force cell) in humans. Each of three participants was exposed to different reinforcement ratios (9:1, 1:1 and 1:9) in the terminal links of a concurrent-chains schedule of negative reinforcement. The allocation of responding under this schedule was well described by the generalized matching equation, for each participant. These results replicate previous findings obtained with nonhumans and humans under concurrent schedules of positive reinforcement. In addition, they extend the results reported by Alessandri and Rivière (2013) showing that human behavior maintained by timeouts from an effortful response is sensitive to changes in relative reinforcement ratios as well as relative delays of reinforcement.

  19. Dynamic Scheduling of Flexible Job Shops

    Institute of Scientific and Technical Information of China (English)

    SHAHID Ikramullah Butt; SUN Hou-fang

    2007-01-01

    Aim of this research is to minimize makespan in the flexible job shop environment by the use of genetic algorithms and scheduling rules.Software is developed using genetic algorithms and scheduling rules based on certain constraints such as non-preemption of jobs,recirculation,set up times,non-breakdown of machines etc.Purpose of the software is to develop a schedule for flexible job shop environment,which is a special case of job shop scheduling problem.Scheduling algorithm used in the software is verified and tested by using MT10 as benchmark problem,presented in the flexible job shop environment at the end.LEKIN(R) software results are also compared with results of the developed software by the use of MT10 benchmark problem to show that the latter is a practical software and can be used successfully at BIT Training Workshop.

  20. Scheduler Vulnerabilities and Attacks in Cloud Computing

    CERN Document Server

    Zhou, Fangfei; Desnoyers, Peter; Sundaram, Ravi

    2011-01-01

    In hardware virtualization a hypervisor provides multiple Virtual Machines (VMs) on a single physical system, each executing a separate operating system instance. The hypervisor schedules execution of these VMs much as the scheduler in an operating system does, balancing factors such as fairness and I/O performance. As in an operating system, the scheduler may be vulnerable to malicious behavior on the part of users seeking to deny service to others or maximize their own resource usage. Recently, publically available cloud computing services such as Amazon EC2 have used virtualization to provide customers with virtual machines running on the provider's hardware, typically charging by wall clock time rather than resources consumed. Under this business model, manipulation of the scheduler may allow theft of service at the expense of other customers, rather than merely reallocating resources within the same administrative domain. We describe a flaw in the Xen scheduler allowing virtual machines to consume almost...

  1. ISAPS: Intelligent Scheduling And Planning System

    Energy Technology Data Exchange (ETDEWEB)

    King, M.S.; Rutherford, W.C.; Grice, J.V. (Allied-Signal Aerospace Co., Kansas City, MO (USA). Kansas City Div.); Kessel, K.L.; Orel, M. (Intellicorp, Mountain View, CA (USA))

    1990-08-01

    ISAPS is a scheduling and planning tool for shop floor personnel working in a Flexible Manufacturing System (FMS) environment. The ISAP system has two integrated components: the Predictive Scheduler (PS) and the Reactive Scheduler (RS). These components work cooperatively to satisfy the four goals of the ISAP system, which are: (G1) meet production due dates, (G2) maximize machining center utilization, (G3) minimize cutting tool migration, and (G4) minimize product flow time. The PS is used to establish schedules for new production requirements. The RS is used to adjust the schedules produced by the PS for unforeseen events that occur during production operations. The PS and RS subsystems have been developed using IntelliCorp's Knowledge Engineering Environment (KEE), an expert system development shell, and Common LISP. Software Quality Assurance (SQA) techniques have been incorporated throughout the development effort to assure the ISAP system meets the manufacturing goals and end user requirements. 5 refs., 4 figs.

  2. Power Extension Package (PEP) system definition extension, orbital service module systems analysis study. Volume 10: PEP project plan

    Science.gov (United States)

    1979-01-01

    Contents: project plan summary; project and mission objectives; related studies and technology support activities; technical summary; management; procurement approach; project definition items and schedule; resources; management review; controlled items; and safety, reliability, and quality assurance.

  3. Routine environmental monitoring schedule, calendar year 1997

    Energy Technology Data Exchange (ETDEWEB)

    Markes, B.M., Westinghouse Hanford

    1996-12-10

    This document provides the Environmental Restorations Contractor (ERC) and the Project Hanford Management Contractor.(PHMC) a schedule in accordance with the WHC-CM-7-5, Environmental Compliance` and BHI- EE-02, Environmental Requirements, of monitoring and sampling routines for the Near-Field Monitoring (NFM) program during calendar year (CY) 1997. Every attempt will be made to consistently follow this schedule; any deviation from this schedule will be documented by an internal memorandum (DSI) explaining the reason for the deviation. The DSI will be issued by the scheduled performing organization and directed to Near-Field Monitoring. The survey frequencies for particular sites are determined by the technical judgment of Near- Field Monitoring and may depend on the site history, radiological status, use, and general conditions. Additional surveys may be requested at irregular frequencies if conditions warrant. All radioactive wastes sites are scheduled to be surveyed at least annually. Any newly discovered wastes sites not documented by this schedule will be included in the revised schedule for CY 1998. The outside perimeter road surveys of 200 East and West Area and the rail survey from the 300 Area to Columbia Center will be performed in the year 2000 per agreement with Department of Energy. Richland Field Office. This schedule does not discuss staffing needs, nor does it list the monitoring equipment to be used in completing specific routines. Personnel performing routines to meet this schedule shall communicate any need for assistance in completing these routines to Radiological Control management and Near-Field Monitoring. After each routine survey is completed, a copy of the survey record, maps, and data sheets will be forwarded to Near-Field Monitoring. These routine surveys will not be considered complete until this documentation is received. At the end of each month, the ERC and PHMC radiological control organizations shall forward a copy of the Routine

  4. TECHNICAL COORDINATION, SCHEDULE AND INTEGRATION

    CERN Multimedia

    A. Ball

    Introduction Despite the holiday season affecting available manpower, many key internal milestones have been passed over the summer, thanks to the dedication and commitment of the team at point 5. In particular, the installation on, and within, YB0 has progressed steadily through several potentially difficult phases. The v36 planning contingency of lowering YB-1 and YB-1 wheels on schedule in October, before Tracker installation, will be executed in order to give more time to complete YB0 services work, whilst still being consistent with completion of heavy lowering by the end of 2007. Safety In the underground areas the peak level of activity and parallel work has been reached and this will continue for the coming months. Utmost vigilance is required of everybody working underground and this must be maintained. However, it is encouraging to note that the compliance with safety rules is, in general, good. More and more work will be carried out from scaffolding and mobile access platforms. (cherry-picke...

  5. TECHNICAL COORDINATION, SCHEDULE AND INTEGRATION

    CERN Multimedia

    A. Ball

    Introduction and Schedule After nearly seven months of concentrated effort, the installation of services on YB0 moved off the CMS critical path in late November. In line with v36 planning provisions, the additional time needed to finish this challeng¬ing task was accommodated by reducing sequential dependencies between assembly tasks, putting more tasks (especially heavy logistic movements) in parallel with activities on, or within, the central wheel. Thus the lowering of wheels YB-1 and YB -2 and of disk YE-3 is already complete, the latter made possible, in the shadow of YB0 work, by inverting the order of the 3 endcap disks in the surface building. Weather conditions permitting, the Tracker will be transported to point 5 during CMS week for insertion in EB before CERN closes. The lowering of the last two disks will take place mid- and end-of January, respectively. Thus central beampipe installation can be confidently planned to start in February as foreseen, allowing closure of CMS in time for CRA...

  6. TECHNICAL COORDINATION, SCHEDULE AND INTEGRATION

    CERN Multimedia

    A. Ball

    Introduction Since the lowering of YB0 in February, less spectacular but nonetheless crucial progress has been made along the critical path to CMS completion. The YB0 has been aligned with the beamline to a fraction of a mm, and the HCAL has been fully installed. Cabling scaffolding for YB0 services has been built and one half (-z end) of the ECAL barrel has been installed. The YB0 services installation has begun, with two of the major technical challenges delaying bulk installation, namely PP1 detailed design, manufacture and installation plus Tracker cooling pipe insulation, now apparently solved. Significant difficulties in detailed design, integration and procurement of cable ducts remain. Despite this, the design of the +end is close to complete, and Tracker power cable installation on two sectors of the +end is well advanced. A new master schedule, v36.0, is being prepared to account for the updated actual situation at point 5 and for the revised LHC machine planning. Safety The enormous amount of...

  7. Performance analysis of active schedules in identical parallel machine

    Institute of Scientific and Technical Information of China (English)

    Changjun WANG; Yugeng XI

    2007-01-01

    Active schedule is one of the most basic and popular concepts in production scheduling research. For identical parallel machine scheduling with jobs' dynamic arrivals, the tight performance bounds of active schedules under the measurement of four popular objectives are respectively given in this paper. Similar analysis method and conclusions can be generalized to static identical parallel machine and single machine scheduling problem.

  8. Practical definition of averages of tensors in general relativity

    CERN Document Server

    Boero, Ezequiel F

    2016-01-01

    We present a definition of tensor fields which are average of tensors over a manifold, with a straightforward and natural definition of derivative for the averaged fields; which in turn makes a suitable and practical construction for the study of averages of tensor fields that satisfy differential equations. Although we have in mind applications to general relativity, our presentation is applicable to a general n-dimensional manifold. The definition is based on the integration of scalars constructed from a physically motivated basis, making use of the least amount of geometrical structure. We also present definitions of covariant derivative of the averaged tensors and Lie derivative.

  9. The comparison of predictive scheduling algorithms for different sizes of job shop scheduling problems

    Science.gov (United States)

    Paprocka, I.; Kempa, W. M.; Grabowik, C.; Kalinowski, K.; Krenczyk, D.

    2016-08-01

    In the paper a survey of predictive and reactive scheduling methods is done in order to evaluate how the ability of prediction of reliability characteristics influences over robustness criteria. The most important reliability characteristics are: Mean Time to Failure, Mean Time of Repair. Survey analysis is done for a job shop scheduling problem. The paper answers the question: what method generates robust schedules in the case of a bottleneck failure occurrence before, at the beginning of planned maintenance actions or after planned maintenance actions? Efficiency of predictive schedules is evaluated using criteria: makespan, total tardiness, flow time, idle time. Efficiency of reactive schedules is evaluated using: solution robustness criterion and quality robustness criterion. This paper is the continuation of the research conducted in the paper [1], where the survey of predictive and reactive scheduling methods is done only for small size scheduling problems.

  10. Ship construction

    National Research Council Canada - National Science Library

    Eyres, D.J; Bruce, G.J

    2012-01-01

    .... "Acting as both a professional reference on current approaches in shipyard practice and a comprehensive introduction for students in any marine discipline, Ship Construction covers the complete...

  11. Constructive Fun.

    Science.gov (United States)

    Simanek, Donald E.

    1994-01-01

    Compares and reviews currently available brands of steel construction sets that are useful to physics teachers for building demonstrations, prototypes of mechanisms, robotics, and remote control devices. (ZWH)

  12. Scheduling language and algorithm development study. Volume 2, phase 2: Introduction to plans programming. [user guide

    Science.gov (United States)

    Cochran, D. R.; Ishikawa, M. K.; Paulson, R. E.; Ramsey, H. R.

    1975-01-01

    A user guide for the Programming Language for Allocation and Network Scheduling (PLANS) is presented. Information is included for the construction of PLANS programs. The basic philosophy of PLANS is discussed, and access and update reference techniques are described along with the use of tree structures.

  13. 18 CFR 157.9 - Notice of application and notice of schedule for environmental review.

    Science.gov (United States)

    2010-04-01

    ... that will require an environmental assessment or an environmental impact statement, notice of a... and notice of schedule for environmental review. 157.9 Section 157.9 Conservation of Power and Water... Amended, Concerning Any Operation, Sales, Service, Construction, Extension, Acquisition or...

  14. Creation of the selection list for the Experiment Scheduling Program (ESP)

    Science.gov (United States)

    Deuermeyer, B. L.; Shannon, R. E.; Underbrink, A. J., Jr.

    1986-01-01

    The efforts to develop a procedure to construct selection groups to augment the Experiment Scheduling Program (ESP) are summarized. Included is a User's Guide and a sample scenario to guide in the use of the software system that implements the developed procedures.

  15. Adding Production Value Through Application of Value Based Scheduling

    DEFF Research Database (Denmark)

    Lindhard, Søren; Wandahl, Søren

    2012-01-01

    Customer value is a key goal in the Lean philosophy, essentially only actions that adds value should be conducted. In a transformation view, the basic lean approach is to remove waste, which indirectly increases value (or withstand value lose). Lean Construction acknowledges two different types...... of value views. Product value, as stated above and value in relation to cooperation in the construction process. Process values are important when it comes to the comfort (physical and mental wellbeing) of the craftsmen cooperating aligned around the same goal of a smooth process and a great end product....... By increasing the comfort of the craftsmen their productivity could increase. Furthermore, shared process values decrease the needs of managerial standards, structures, and systems. By means of a questionnaire survey this study investigates the connection between scheduling and the comfort achieved through...

  16. Adding production value through application of value based scheduling

    DEFF Research Database (Denmark)

    Lindhard, Søren Munch; Wandahl, Søren

    2012-01-01

    Customer value is a key goal in the Lean philosophy, essentially only actions that adds value should be conducted. In a transformation view, the basic lean approach is to remove waste, which indirectly increases value (or withstand value lose). Lean Construction acknowledges two different types...... of value views. Product value, as stated above and value in relation to cooperation in the construction process. Process values are important when it comes to the comfort (physical and mental wellbeing) of the craftsmen cooperating aligned around the same goal of a smooth process and a great end product....... By increasing the comfort of the craftsmen their productivity could increase. Furthermore, shared process values decrease the needs of managerial standards, structures, and systems. By means of a questionnaire survey this study investigates the connection between scheduling and the comfort achieved through...

  17. Adding production value through application of value based scheduling

    DEFF Research Database (Denmark)

    Lindhard, Søren Munch; Wandahl, Søren

    2012-01-01

    . By increasing the comfort of the craftsmen their productivity could increase. Furthermore, shared process values decrease the needs of managerial standards, structures, and systems. By means of a questionnaire survey this study investigates the connection between scheduling and the comfort achieved through......Customer value is a key goal in the Lean philosophy, essentially only actions that adds value should be conducted. In a transformation view, the basic lean approach is to remove waste, which indirectly increases value (or withstand value lose). Lean Construction acknowledges two different types...... of value views. Product value, as stated above and value in relation to cooperation in the construction process. Process values are important when it comes to the comfort (physical and mental wellbeing) of the craftsmen cooperating aligned around the same goal of a smooth process and a great end product...

  18. Block scheduling: Instructional practices in high school science classrooms

    Science.gov (United States)

    Richelsoph, Barry

    Proponents of block scheduling perceive this approach to be a 'structural lever' to invite and impel teachers to change their teaching (Marshak, 1997). This desired shift is supposed to be manifest in movement from the traditional classroom structure, focusing on the teacher as lecturer or transmitter of subject matter, to that of teacher as coach with students as active learners, engaged in a variety of activities involving them individually and collaboratively in their education (Canady & Rettig, 1995). Block scheduling changes the formal structure of the school day, but does it really change pedagogical practices in high school science classrooms? Fraser's Individualized Classroom Environment Questionnaire (ICEQ) the instrument used in this study of science classes in five block-scheduled high schools in Connecticut, incorporates the tenets for an enriched classroom environment in its five scales or constructs: Participation---Extent to which students are encouraged to participate rather than be passive learners; Personalization---Emphasis on opportunities for individual students to interact with the teacher and on concern for the personal welfare and social growth of the individual; Investigation---Emphasis on the skills and processes of inquiry and their use in problem solving and investigation. Independence---Extent to which students are allowed to make decisions and have control over their own learning environment and behavior; Differentiation---Emphasis on the selective treatment of students on the basis of ability, learning style, interests, and rate of working (Fraser, 1990). The results and conclusions from this research study suggested that the block-scheduled high school science classes that participated in this research do promote, to varying degrees, those tenets that define an enriched classroom environment. Both the teachers and their classes of students perceived opportunities for Participation, Personalization, and Investigation constructs as

  19. MEDICAL STAFF SCHEDULING USING SIMULATED ANNEALING

    Directory of Open Access Journals (Sweden)

    Ladislav Rosocha

    2015-07-01

    Full Text Available Purpose: The efficiency of medical staff is a fundamental feature of healthcare facilities quality. Therefore the better implementation of their preferences into the scheduling problem might not only rise the work-life balance of doctors and nurses, but also may result into better patient care. This paper focuses on optimization of medical staff preferences considering the scheduling problem.Methodology/Approach: We propose a medical staff scheduling algorithm based on simulated annealing, a well-known method from statistical thermodynamics. We define hard constraints, which are linked to legal and working regulations, and minimize the violations of soft constraints, which are related to the quality of work, psychic, and work-life balance of staff.Findings: On a sample of 60 physicians and nurses from gynecology department we generated monthly schedules and optimized their preferences in terms of soft constraints. Our results indicate that the final value of objective function optimized by proposed algorithm is more than 18-times better in violations of soft constraints than initially generated random schedule that satisfied hard constraints.Research Limitation/implication: Even though the global optimality of final outcome is not guaranteed, desirable solutionwas obtained in reasonable time. Originality/Value of paper: We show that designed algorithm is able to successfully generate schedules regarding hard and soft constraints. Moreover, presented method is significantly faster than standard schedule generation and is able to effectively reschedule due to the local neighborhood search characteristics of simulated annealing.

  20. NRC comprehensive records disposition schedule. Revision 3

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1998-02-01

    Title 44 US Code, ``Public Printing and Documents,`` regulations issued by the General Service Administration (GSA) in 41 CFR Chapter 101, Subchapter B, ``Management and Use of Information and Records,`` and regulations issued by the National Archives and Records Administration (NARA) in 36 CFR Chapter 12, Subchapter B, ``Records Management,`` require each agency to prepare and issue a comprehensive records disposition schedule that contains the NARA approved records disposition schedules for records unique to the agency and contains the NARA`s General Records Schedules for records common to several or all agencies. The approved records disposition schedules specify the appropriate duration of retention and the final disposition for records created or maintained by the NRC. NUREG-0910, Rev. 3, contains ``NRC`s Comprehensive Records Disposition Schedule,`` and the original authorized approved citation numbers issued by NARA. Rev. 3 incorporates NARA approved changes and additions to the NRC schedules that have been implemented since the last revision dated March, 1992, reflects recent organizational changes implemented at the NRC, and includes the latest version of NARA`s General Records Schedule (dated August 1995).