Sample records for berth allocation problem

  1. Minimizing the Total Service Time of Discrete Dynamic Berth Allocation Problem by an Iterated Greedy Heuristic

    PubMed Central

    2014-01-01

    Berth allocation is the forefront operation performed when ships arrive at a port and is a critical task in container port optimization. Minimizing the time ships spend at berths constitutes an important objective of berth allocation problems. This study focuses on the discrete dynamic berth allocation problem (discrete DBAP), which aims to minimize total service time, and proposes an iterated greedy (IG) algorithm to solve it. The proposed IG algorithm is tested on three benchmark problem sets. Experimental results show that the proposed IG algorithm can obtain optimal solutions for all test instances of the first and second problem sets and outperforms the best-known solutions for 35 out of 90 test instances of the third problem set. PMID:25295295

  2. Artificial Intelligence Techniques for the Berth Allocation and Container Stacking Problems in Container Terminals

    NASA Astrophysics Data System (ADS)

    Salido, Miguel A.; Rodriguez-Molins, Mario; Barber, Federico

    The Container Stacking Problem and the Berth Allocation Problem are two important problems in maritime container terminal's management which are clearly related. Terminal operators normally demand all containers to be loaded into an incoming vessel should be ready and easily accessible in the terminal before vessel's arrival. Similarly, customers (i.e., vessel owners) expect prompt berthing of their vessels upon arrival. In this paper, we present an artificial intelligence based-integrated system to relate these problems. Firstly, we develop a metaheuristic algorithm for berth allocation which generates an optimized order of vessel to be served according to existing berth constraints. Secondly, we develop a domain-oriented heuristic planner for calculating the number of reshuffles needed to allocate containers in the appropriate place for a given berth ordering of vessels. By combining these optimized solutions, terminal operators can be assisted to decide the most appropriated solution in each particular case.

  3. Practical solutions for reducing container ships' waiting times at ports using simulation model

    NASA Astrophysics Data System (ADS)

    Sheikholeslami, Abdorreza; Ilati, Gholamreza; Yeganeh, Yones Eftekhari

    2013-12-01

    The main challenge for container ports is the planning required for berthing container ships while docked in port. Growth of containerization is creating problems for ports and container terminals as they reach their capacity limits of various resources which increasingly leads to traffic and port congestion. Good planning and management of container terminal operations reduces waiting time for liner ships. Reducing the waiting time improves the terminal's productivity and decreases the port difficulties. Two important keys to reducing waiting time with berth allocation are determining suitable access channel depths and increasing the number of berths which in this paper are studied and analyzed as practical solutions. Simulation based analysis is the only way to understand how various resources interact with each other and how they are affected in the berthing time of ships. We used the Enterprise Dynamics software to produce simulation models due to the complexity and nature of the problems. We further present case study for berth allocation simulation of the biggest container terminal in Iran and the optimum access channel depth and the number of berths are obtained from simulation results. The results show a significant reduction in the waiting time for container ships and can be useful for major functions in operations and development of container ship terminals.

  4. Investigating Outfitting Density as a Cost Driver in Submarine Construction

    DTIC Science & Technology

    2015-09-01

    Outfitting and furnishings, such as offices, medical, stores, berthing , joiner work and paint are allocated 12 to group 600. Group 700 is armament...handling, fire control, steering 600 Outfit and Furnishings Hull fittings, paint, insulation, berthing , offices, storerooms, medical 700 Armament...and is allocated for the service-life of the submarine. The AWE serves as the baseline weight for the Milestone B costing position for projected

  5. Navy Littoral Combat Ship (LCS)/Frigate Program: Background and Issues for Congress

    DTIC Science & Technology

    2015-12-22

    the ships. The Navy continues to review manning to determine appropriate levels, and is adding 20 berths to all seaframes. The increased berthing ...ships would determine the allocation of the three FY2010 ships, with the winning team getting two of the FY2010 ships and the other team getting one

  6. Navy Littoral Combat Ship (LCS)/Frigate Program: Background and Issues for Congress

    DTIC Science & Technology

    2016-01-05

    and is adding 20 berths to all seaframes. The increased berthing supports small increases in the size of the core crew, mission package detachments...for both the FY2009 ships and the FY2010 ships would determine the allocation of the three FY2010 ships, with the winning team getting two of the

  7. A Simulation Based Approach to Optimize Berth Throughput Under Uncertainty at Marine Container Terminals

    NASA Technical Reports Server (NTRS)

    Golias, Mihalis M.

    2011-01-01

    Berth scheduling is a critical function at marine container terminals and determining the best berth schedule depends on several factors including the type and function of the port, size of the port, location, nearby competition, and type of contractual agreement between the terminal and the carriers. In this paper we formulate the berth scheduling problem as a bi-objective mixed-integer problem with the objective to maximize customer satisfaction and reliability of the berth schedule under the assumption that vessel handling times are stochastic parameters following a discrete and known probability distribution. A combination of an exact algorithm, a Genetic Algorithms based heuristic and a simulation post-Pareto analysis is proposed as the solution approach to the resulting problem. Based on a number of experiments it is concluded that the proposed berth scheduling policy outperforms the berth scheduling policy where reliability is not considered.

  8. An Analysis of Test And Evaluation in Rapid Acquisition Programs

    DTIC Science & Technology

    2015-12-01

    program manager is assigned the requirement and allocated resources to carry out with an acquisition plan. 2. Role of Test and Evaluation Test and...Manual, verify the Maintenance Allocation Chart, and ensure the completeness of the System Support Package. The Maintainability Demonstration measured...additional outside personnel that require additional logistics support, such as security, facilitates, and berthing placing additional strain on units. CLS

  9. A study on ship automatic berthing with assistance of auxiliary devices

    NASA Astrophysics Data System (ADS)

    Tran, Van Luong; Im, Namkyun

    2012-09-01

    The recent researches on the automatic berthing control problems have used various kinds of tools as a control method such as expert system, fuzzy logic controllers and artificial neural network (ANN). Among them, ANN has proved to be one of the most effective and attractive options. In a marine context, the berthing maneuver is a complicated procedure in which both human experience and intensive control operations are involved. Nowadays, in most cases of berthing operation, auxiliary devices are used to make the schedule safer and faster but none of above researches has taken into account. In this study, ANN is applied to design the controllers for automatic ship berthing using assistant devices such as bow thruster and tug. Using back-propagation algorithm, we trained ANN with set of teaching data to get a minimal error between output values and desired values of four control outputs including rudder, propeller revolution, bow thruster and tug. Then, computer simulations of automatic berthing were carried out to verify the effecttiveness of the system. The results of the simulations showed good performance for the proposed berthing control system.

  10. Evaluating Efficiencies in Preventive Medicine: Comparing Approaches Between the Services

    DTIC Science & Technology

    2016-02-29

    Prank] + Σn [(Td * L) + (Td * Pdiem)] C: Cost in dollars T: Time allocated for training in days Prank: Pay for the expected rank in dollars per...of food service facilities and storage areas, berthing spaces, childcare facilities, recreational facilities, potable water and wastewater disposal

  11. The Advanced Surface Force Fleet: A Proposal for an Alternate Surface Force Structure and Its Impact in the Asian Pacific Theater

    DTIC Science & Technology

    2015-12-01

    B. THE PROSPECTIVE 2040 7TH FLEET FORCES Based on the current and planned naval forces allocated to 7th Fleet, it is assumed that the Navy’s 2040...approximately 15 percent of The Advanced Surface Force Fleet, or 20 ships, are allocated to 7th Fleet. Furthermore, 12 of The Advanced Surface...production, personnel support for cleanup and recovery efforts, berthing capability, and medical support.90 After determining the critical missions

  12. Effective motion planning strategy for space robot capturing targets under consideration of the berth position

    NASA Astrophysics Data System (ADS)

    Zhang, Xin; Liu, Jinguo

    2018-07-01

    Although many motion planning strategies for missions involving space robots capturing floating targets can be found in the literature, relatively little has discussed how to select the berth position where the spacecraft base hovers. In fact, the berth position is a flexible and controllable factor, and selecting a suitable berth position has a great impact on improving the efficiency of motion planning in the capture mission. Therefore, to make full use of the manoeuvrability of the space robot, this paper proposes a new viewpoint that utilizes the base berth position as an optimizable parameter to formulate a more comprehensive and effective motion planning strategy. Considering the dynamic coupling, the dynamic singularities, and the physical limitations of space robots, a unified motion planning framework based on the forward kinematics and parameter optimization technique is developed to convert the planning problem into the parameter optimization problem. For getting rid of the strict grasping position constraints in the capture mission, a new conception of grasping area is proposed to greatly simplify the difficulty of the motion planning. Furthermore, by utilizing the penalty function method, a new concise objective function is constructed. Here, the intelligent algorithm, Particle Swarm Optimization (PSO), is worked as solver to determine the free parameters. Two capturing cases, i.e., capturing a two-dimensional (2D) planar target and capturing a three-dimensional (3D) spatial target, are studied under this framework. The corresponding simulation results demonstrate that the proposed method is more efficient and effective for planning the capture missions.

  13. The application of structural reliability techniques to plume impingement loading of the Space Station Freedom Photovoltaic Array

    NASA Technical Reports Server (NTRS)

    Yunis, Isam S.; Carney, Kelly S.

    1993-01-01

    A new aerospace application of structural reliability techniques is presented, where the applied forces depend on many probabilistic variables. This application is the plume impingement loading of the Space Station Freedom Photovoltaic Arrays. When the space shuttle berths with Space Station Freedom it must brake and maneuver towards the berthing point using its primary jets. The jet exhaust, or plume, may cause high loads on the photovoltaic arrays. The many parameters governing this problem are highly uncertain and random. An approach, using techniques from structural reliability, as opposed to the accepted deterministic methods, is presented which assesses the probability of failure of the array mast due to plume impingement loading. A Monte Carlo simulation of the berthing approach is used to determine the probability distribution of the loading. A probability distribution is also determined for the strength of the array. Structural reliability techniques are then used to assess the array mast design. These techniques are found to be superior to the standard deterministic dynamic transient analysis, for this class of problem. The results show that the probability of failure of the current array mast design, during its 15 year life, is minute.

  14. 46 CFR 111.75-15 - Lighting requirements.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... spaces. (1) Each space used by passengers or crew must be fitted with lighting that provides for a safe... provide for safe egress from each space. (d) Berth lights. Each crew berth must have a fixed berth light... passageways, public spaces, and berthing compartments. The supply to lights in each passageway, public space...

  15. Impact of sleeper berth usage on commercial driver fatigue : task 1

    DOT National Transportation Integrated Search

    1999-11-01

    Driver fatigue is recognized as a major factor in the safety of long-haul commercial driving. Sleeper berths are often provided on tractors to allow the driver to sleep and rest when not driving. However, the sleeper berth environment and/or the mann...

  16. 46 CFR 108.203 - Berths and lockers.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 46 Shipping 4 2010-10-01 2010-10-01 false Berths and lockers. 108.203 Section 108.203 Shipping... EQUIPMENT Construction and Arrangement Accommodation Spaces § 108.203 Berths and lockers. (a) Each sleeping...) Each occupant of a sleeping space must have a readily accessible locker of hard, smooth material. (k...

  17. 46 CFR 108.203 - Berths and lockers.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 46 Shipping 4 2011-10-01 2011-10-01 false Berths and lockers. 108.203 Section 108.203 Shipping... EQUIPMENT Construction and Arrangement Accommodation Spaces § 108.203 Berths and lockers. (a) Each sleeping...) Each occupant of a sleeping space must have a readily accessible locker of hard, smooth material. (k...

  18. 46 CFR 108.203 - Berths and lockers.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 46 Shipping 4 2014-10-01 2014-10-01 false Berths and lockers. 108.203 Section 108.203 Shipping... EQUIPMENT Construction and Arrangement Accommodation Spaces § 108.203 Berths and lockers. (a) Each sleeping...) Each occupant of a sleeping space must have a readily accessible locker of hard, smooth material. (k...

  19. 46 CFR 108.203 - Berths and lockers.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 46 Shipping 4 2012-10-01 2012-10-01 false Berths and lockers. 108.203 Section 108.203 Shipping... EQUIPMENT Construction and Arrangement Accommodation Spaces § 108.203 Berths and lockers. (a) Each sleeping...) Each occupant of a sleeping space must have a readily accessible locker of hard, smooth material. (k...

  20. 46 CFR 108.203 - Berths and lockers.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 46 Shipping 4 2013-10-01 2013-10-01 false Berths and lockers. 108.203 Section 108.203 Shipping... EQUIPMENT Construction and Arrangement Accommodation Spaces § 108.203 Berths and lockers. (a) Each sleeping...) Each occupant of a sleeping space must have a readily accessible locker of hard, smooth material. (k...

  1. 46 CFR 111.75-15 - Lighting requirements.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... spaces. (1) Each space used by passengers or crew must be fitted with lighting that provides for a safe habitable and working environment under normal conditions. (2) Sufficient illumination must be provided by... provide for safe egress from each space. (d) Berth lights. Each crew berth must have a fixed berth light...

  2. Berthing simulator for space station and orbiter

    NASA Technical Reports Server (NTRS)

    Veerasamy, Sam

    1991-01-01

    The development of a real-time man-in-the-loop berthing simulator is in progress at NASA Lyndon B. Johnson Space Center (JSC) to conduct a parametric study and to measure forces during contact conditions of the actual docking mechanisms for the Space Station Freedom and the orbiter. In berthing, the docking ports of the Space Station and the orbiter are brought together using the orbiter robotic arm to control the relative motion of the vehicles. The berthing simulator consists of a dynamics docking test system (DDTS), computer system, simulator software, and workstations. In the DDTS, the Space Station, and the orbiter docking mechanisms are mounted on a six-degree-of-freedom (6 DOF) table and a fixed platform above the table. Six load cells are used on the fixed platform to measure forces during contact conditions of the docking mechanisms. Two Encore Concept 32/9780 computers are used to simulate the orbiter robotic arm and to operate the berthing simulator. A systematic procedure for a real-time dynamic initialization is being developed to synchronize the Space Station docking port trajectory with the 6 DOF table movement. The berthing test can be conducted manually or automatically and can be extended for any two orbiting vehicles using a simulated robotic arm. The real-time operation of the berthing simulator is briefly described.

  3. Experimental validation of docking and capture using space robotics testbeds

    NASA Technical Reports Server (NTRS)

    Spofford, John

    1991-01-01

    Docking concepts include capture, berthing, and docking. The definitions of these terms, consistent with AIAA, are as follows: (1) capture (grasping)--the use of a manipulator to make initial contact and attachment between transfer vehicle and a platform; (2) berthing--positioning of a transfer vehicle or payload into platform restraints using a manipulator; and (3) docking--propulsive mechanical connection between vehicle and platform. The combination of the capture and berthing operations is effectively the same as docking; i.e., capture (grasping) + berthing = docking. These concepts are discussed in terms of Martin Marietta's ability to develop validation methods using robotics testbeds.

  4. Analysis of dangerous area of single berth oil tanker operations based on CFD

    NASA Astrophysics Data System (ADS)

    Shi, Lina; Zhu, Faxin; Lu, Jinshu; Wu, Wenfeng; Zhang, Min; Zheng, Hailin

    2018-04-01

    Based on the single process in the liquid cargo tanker berths in the state as the research object, we analyzed the single berth oil tanker in the process of VOCs diffusion theory, built network model of VOCs diffusion with Gambit preprocessor, set up the simulation boundary conditions and simulated the five detection point sources in specific factors under the influence of VOCs concentration change with time by using Fluent software. We analyzed the dangerous area of single berth oil tanker operations through the diffusion of VOCs, so as to ensure the safe operation of oil tanker.

  5. 14 CFR 25.785 - Seats, berths, safety belts, and harnesses.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... must be protected from head injury by a safety belt and an energy absorbing rest that will support the... energy absorbing rest that will support the arms, shoulders, head, and spine. (e) Each berth must be... § 25.561. Berths must be free from corners and protuberances likely to cause injury to a person...

  6. 14 CFR 25.785 - Seats, berths, safety belts, and harnesses.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... must be protected from head injury by a safety belt and an energy absorbing rest that will support the... energy absorbing rest that will support the arms, shoulders, head, and spine. (e) Each berth must be... § 25.561. Berths must be free from corners and protuberances likely to cause injury to a person...

  7. 14 CFR 25.785 - Seats, berths, safety belts, and harnesses.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... must be protected from head injury by a safety belt and an energy absorbing rest that will support the... energy absorbing rest that will support the arms, shoulders, head, and spine. (e) Each berth must be... § 25.561. Berths must be free from corners and protuberances likely to cause injury to a person...

  8. 14 CFR 25.785 - Seats, berths, safety belts, and harnesses.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... must be protected from head injury by a safety belt and an energy absorbing rest that will support the... energy absorbing rest that will support the arms, shoulders, head, and spine. (e) Each berth must be... § 25.561. Berths must be free from corners and protuberances likely to cause injury to a person...

  9. 14 CFR 25.785 - Seats, berths, safety belts, and harnesses.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... must be protected from head injury by a safety belt and an energy absorbing rest that will support the... energy absorbing rest that will support the arms, shoulders, head, and spine. (e) Each berth must be... § 25.561. Berths must be free from corners and protuberances likely to cause injury to a person...

  10. Evaluation of a berth sedimentation control technology in the Kill Van Kull : the AirGuard (TM) pneumatic barrier system

    DOT National Transportation Integrated Search

    2001-01-01

    The problems associated with dredging and disposal in the New York and New Jersey harbor area over the past ten years have triggered sedimentation avoidance as being one of many possible tools in an ever-growing arsenal of dredged material management...

  11. Autonomous berthing/unberthing of a Work Attachment Mechanism/Work Attachment Fixture (WAM/WAF)

    NASA Technical Reports Server (NTRS)

    Nguyen, Charles C.; Antrazi, Sami S.

    1992-01-01

    Discussed here is the autonomous berthing of a Work Attachment Mechanism/Work Attachment Fixture (WAM/WAF) developed by NASA for berthing and docking applications in space. The WAM/WAF system enables fast and reliable berthing (unberthing) of space hardware. A successful operation of the WAM/WAF requires that the WAM motor velocity be precisely controlled. The operating principle and the design of the WAM/WAF is described as well as the development of a control system used to regulate the WAM motor velocity. The results of an experiment in which the WAM/WAF is used to handle an orbital replacement unit are given.

  12. Measuring mental workload and physiological reactions in marine pilots: Building bridges towards redlines of performance.

    PubMed

    Orlandi, Luca; Brooks, Benjamin

    2018-05-01

    This paper investigates the effects of shiphandling manoeuvres on mental workload and physiological reactions in ten marine pilots. Each pilot performed four berthings in a ship simulator. Those berthings were differentiated by two factors, level of difficulty and familiarity with the port. Each berthing could also be divided into five phases, three during the execution and two resting periods, one before and one after the execution (dedicated to baseline physiological data collection). Mental workload was measured through two self assessment scales: the NASA TLX and a Likert scale. Power spectral densities on Beta bands 1 and 2 were obtained from EEG. Heart rate and heart rate variability were obtained from ECG. Pupil dilation was obtained from eye tracking. Workload levels were higher as berthings increased in difficulty level and/or the pilots completed the berthings in unfamiliar ports. Responses differed across specific phases of the berthings. Physiological responses could indirectly monitor levels of mental workload, and could be adopted in future applications to evaluate training improvements and performance. This study provides an example of an applied methodology aiming to define an upper redline of task demands in the context of marine pilotage. Copyright © 2018. Published by Elsevier Ltd.

  13. Analysis of Protection Measures for Naval Vessels Berthed at Harbor Against Terrorist Attacks

    DTIC Science & Technology

    2016-06-01

    NAVAL POSTGRADUATE SCHOOL MONTEREY, CALIFORNIA THESIS Approved for public release; distribution is unlimited ANALYSIS OF...2016 3. REPORT TYPE AND DATES COVERED Master’s thesis 4. TITLE AND SUBTITLE ANALYSIS OF PROTECTION MEASURES FOR NAVAL VESSELS BERTHED AT HARBOR... ANALYSIS OF PROTECTION MEASURES FOR NAVAL VESSELS BERTHED AT HARBOR AGAINST TERRORIST ATTACKS Raja I. Sikandar Lieutenant Commander, Pakistan Navy

  14. Fuel saving and emissions cut through shore-side power concept for high-speed crafts at the red sea in egypt

    NASA Astrophysics Data System (ADS)

    Seddiek, Ibrahim S.; Mosleh, Mosaad A.; Banawan, Adel A.

    2013-12-01

    The progress of economic globalization, the rapid growth of international trade, and the maritime transportation has played an increasingly significant role in the international supply chain. As a result, worldwide seaports have suffered from a central problem, which appears in the form of massive amounts of fuel consumed and exhaust gas fumes emitted from the ships while berthed. Many ports have taken the necessary precautions to overcome this problem, while others still suffer due to the presence of technical and financial constraints. In this paper, the barriers, interconnection standards, rules, regulations, power sources, and economic and environmental analysis related to ships, shore-side power were studied in efforts to find a solution to overcome his problem. As a case study, this paper investigates the practicability, costs and benefits of switching from onboard ship auxiliary engines to shore-side power connection for high-speed crafts called Alkahera while berthed at the port of Safaga, Egypt. The results provide the national electricity grid concept as the best economical selection with 49.03 percent of annual cost saving. Moreover, environmentally, it could achieve an annual reduction in exhaust gas emissions of CO2, CO, NO x , P.M, and SO2 by 276, 2.32, 18.87, 0.825 and 3.84 tons, respectively.

  15. An Analysis of Unit Deployments Through US East Coast Ports

    DTIC Science & Technology

    1992-06-01

    comprehensive description of port facilities and an analysis of ship/berth capability. B. PURPOSE To evaluate US east coast commercial port facilities to...an internal highway bridge. This bridge crosses Colgate Creek. The site was formerly a containment area for disposal of excavated material from the...and Sea-Land can berth breakbulk vessels. However, loading at the Sea-Land berth will be time- consuming because of the configuration of the pier. II

  16. Designing berthing mechanisms for international compatibility

    NASA Technical Reports Server (NTRS)

    Winch, John; Gonzalez-Vallejo, Juan J.

    1991-01-01

    The paper examines the technological issues regarding common berthing interfaces for the Space Station Freedom and pressurized modules from U.S., European, and Japanese space programs. The development of the common berthing mechanism (CBM) is based on common requirements concerning specifications, launch environments, and the unique requirements of ESA's Man-Tended Free Flyer. The berthing mechanism is composed of an active and a passive half, a remote manipulator system, 4 capture-latch assemblies, 16 structural bolts, and a pressure gage to verify equalization. Extensive graphic and verbal descriptions of each element are presented emphasizing the capture-latch motion and powered-bolt operation. The support systems to complete the interface are listed, and the manufacturing requirements for consistent fabrication are discussed to ensure effective international development.

  17. Berthing and Utilities Requirements Forecasting (BURF) Program of the NAVSHIPS Long Range Workload Planning System (LRPS).

    DTIC Science & Technology

    1973-02-01

    No Deec F3202 B P egcak what(oniud 8 +Yes Fe d . Each phase is discussed in detail in Section 3 of this report. The logic flow of BURFA is shown in...Clas Flowchart for Function INFST D-14 ASSGN Call SORT Initialize Berth Facilities J=1,3 2 ISN I A Ship Yet Assigned E Berth No Determine N1 , N2 3 K N1

  18. Shipboard Facilities Maintenance and Manpower Utilization: Problem and Approach

    DTIC Science & Technology

    1975-11-01

    sweeping, butting, polishing, lacquering, stenciling, vacuuming and shampooing , garbage disposal and trash removal, and all manner of sanitary and...spaces, passageways, heads and showers, crew lounge, mess decks, exterior deck and ship sides, and all office spaces; and limited facilities...maintenance in all passageways, heads , mess decks, office spaces, and berthing areas. They will also per- form sanitization and exterior deck and

  19. CBCS

    NASA Image and Video Library

    2013-09-15

    ISS037-E-001110 (15 Sept. 2013) --- European Space Agency astronaut Luca Parmitano, Expedition 37 flight engineer, installs the Common Berthing Mechanism (CBM) Centerline Berthing Camera System (CBCS) inside the International Space Station’s Harmony node.

  20. Parmitano in Node 2

    NASA Image and Video Library

    2013-09-15

    ISS037-E-001084 (15 Sept. 2013) --- European Space Agency astronaut Luca Parmitano, Expedition 37 flight engineer, installs the Common Berthing Mechanism (CBM) Centerline Berthing Camera System (CBCS) inside the International Space Station’s Harmony node.

  1. 23. CREW'S BERTHING, TOWARDS PORT, BUNKS ALONG PORT WALL, LOCKERS ...

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

    23. CREW'S BERTHING, TOWARDS PORT, BUNKS ALONG PORT WALL, LOCKERS LINE CROSS CORRIDOR. - U.S. Coast Guard Cutter WHITE LUPINE, U.S. Coast Guard Station Rockland, east end of Tillson Avenue, Rockland, Knox County, ME

  2. The Supervisor and Technological Change--A Study of the Changing Role of the Supervisor in the Port Transport Industry.

    ERIC Educational Resources Information Center

    Wilkinson, B.

    Training is one of the many means that an organization may use to help its employees in their adaption to organizational change. F. Olsen Ltd. is a major Norwegian International Shipping organization. This study was concerned with the Olsen Berths based at Mill Docks in the Port of London. The major problems, as defined by senior management at…

  3. 23. CREWS' BERTHING, SHOWING DETAIL OF INTERIOR LOCKING MECHANISM ON ...

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

    23. CREWS' BERTHING, SHOWING DETAIL OF INTERIOR LOCKING MECHANISM ON HATCH DOOR (INTERIOR SIDE OF DOOR IN IMAGE 22). - U.S. Coast Guard Cutter WHITE HEATH, USGS Integrated Support Command Boston, 427 Commercial Street, Boston, Suffolk County, MA

  4. 21. DECK ABOVE CREW'S BERTHING, LOOKING TOWARDS STERN, SHOWING DETAIL ...

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

    21. DECK ABOVE CREW'S BERTHING, LOOKING TOWARDS STERN, SHOWING DETAIL OF THIS DECK THAT WAS EXTENDED IN THE 1960'S. - U.S. Coast Guard Cutter WHITE HEATH, USGS Integrated Support Command Boston, 427 Commercial Street, Boston, Suffolk County, MA

  5. Raymond International Inc. will construct twin berthing facilities for loading and offloading crude

    DOE Office of Scientific and Technical Information (OSTI.GOV)

    Not Available

    1978-03-06

    Raymond International Inc. will construct twin berthing facilities for loading and offloading crude in St. James Parish, La. The $16.6 million contract was let under the Strategic Petroleum Reserve program. Completion is expected in 1978.

  6. 46 CFR 177.810 - Overnight accommodations.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... TONS) CONSTRUCTION AND ARRANGEMENT Passenger Accommodations § 177.810 Overnight accommodations. (a) A... three high and must be constructed of wood, fiber reinforced plastic, or metal. A berth located more... construction and arrangement of berths and other furniture must allow free and unobstructed access to each...

  7. 49 CFR 393.76 - Sleeper berths.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... case of a sleeper berth which utilizes an adjustable mechanical suspension system, the required... communication may consist of a telephone, speaker tube, buzzer, pull cord, or other mechanical or electrical...) A mattress filled with a fluid and of sufficient thickness when filled to prevent “bottoming-out...

  8. Alopecia areata

    MedlinePlus

    ... Diagnosis and Therapy . 6th ed. Philadelphia, PA: Elsevier; 2016:chap 24. Vivehanantha S, Berth-Jones J. Alopecia areata. In: Lebwohl MG, Heymann WR, Berth-Jones J, Coulson I, eds. Treatment of Skin Disease: Comprehensive Therapeutic Strategies . 4th ed. Philadelphia, PA: ... Updated by: David L. Swanson, MD, Vice Chair ...

  9. 22. FROM CREW'S BERTHING, LOOKING TOWARDS STERN, SHOWING DETAIL OF ...

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

    22. FROM CREW'S BERTHING, LOOKING TOWARDS STERN, SHOWING DETAIL OF INTERIOR LICKING MECHANISM OF HATCH DOOR OPENING TO FANTAIL (INTERIOR SIDE OF DOOR IN IMAGE 22). - U.S. Coast Guard Cutter WHITE LUPINE, U.S. Coast Guard Station Rockland, east end of Tillson Avenue, Rockland, Knox County, ME

  10. 46 CFR 116.810 - Overnight accommodations.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... THAN 150 PASSENGERS OR WITH OVERNIGHT ACCOMMODATIONS FOR MORE THAN 49 PASSENGERS CONSTRUCTION AND... space above. (b) Berths must not be located more than three high and must be constructed of wood, fiber... fitted with a suitable aid for access. (c) The construction and arrangement of berths and other furniture...

  11. 46 CFR 69.117 - Spaces exempt from inclusion in gross tonnage.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ..., berthing areas, staterooms, bathrooms, toilets, libraries, writing rooms, lounges, dining rooms, saloons... exempt from gross tonnage only when it has no berthing accommodations and is an open structure under paragraph (d) of this section. (d) Open structures. (1) Structures that are located on or above the line of...

  12. 46 CFR 69.117 - Spaces exempt from inclusion in gross tonnage.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ..., berthing areas, staterooms, bathrooms, toilets, libraries, writing rooms, lounges, dining rooms, saloons... exempt from gross tonnage only when it has no berthing accommodations and is an open structure under paragraph (d) of this section. (d) Open structures. (1) Structures that are located on or above the line of...

  13. Driver distraction analysis on naturalistic heavy vehicle data : Task 2: Analysis of sleeper berth data for distraction events - Draft final report

    DOT National Transportation Integrated Search

    2001-10-04

    Data from 41 long-haul truck drivers were collected and analyzed for the Federal Motor Carriers Safety Administration (FMCSA) sponsored project entitled, Impact of Sleeper Berth Usage on Driver Fatigue (Dingus et al., 2001). This data was colle...

  14. 46 CFR 168.15-20 - Equipment.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 46 Shipping 7 2010-10-01 2010-10-01 false Equipment. 168.15-20 Section 168.15-20 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) NAUTICAL SCHOOLS CIVILIAN NAUTICAL SCHOOL VESSELS Accommodations § 168.15-20 Equipment. (a) Each person shall have a separate berth and not more than 1 berth may...

  15. 76 FR 77515 - California State Nonroad Engine Pollution Control Standards; Ocean-Going Vessels At-Berth in...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-12-13

    ..., rents or leases any container vessel, passenger vessel, or refrigerated cargo vessel that visits any of...-Berth Regulation requires fleets of container vessels, passenger vessels and refrigerated cargo vessels... and particulate matter from auxiliary diesel engines on container vessels, passenger vessels and...

  16. SFU retrieval and berth in shuttle orbiter Endeavour's payload bay

    NASA Image and Video Library

    1996-01-13

    STS072-734-011 (11 Jan. 1996) --- The crewmembers captured this 35mm view of the Japanese Space Flyer Unit (SFU) during its berthing with the Remote Manipulator System (RMS). Yet to be deployed is the Office of Aeronautics and Space Technology (OAST) Flyer satellite, seen at bottom center.

  17. Space Station Common Berthing Mechanism, a multi-body simulation application

    NASA Technical Reports Server (NTRS)

    Searle, Ian

    1993-01-01

    This paper discusses an application of multi-body dynamic analysis conducted at the Boeing Company in connection with the Space Station (SS) Common Berthing Mechanism (CBM). After introducing the hardware and analytical objectives we will focus on some of the day-to-day computational issues associated with this type of analysis.

  18. 46 CFR 72.20-20 - Sleeping accommodations.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... be of such size that there is at least 2.78 square meters (30 square feet) of deck area and a volume of at least 5.8 cubic meters (210 cubic feet) for each person accommodated. The clear head room shall... another. The berth must be composed of materials not likely to corrode. The overall size of a berth must...

  19. 46 CFR 72.20-20 - Sleeping accommodations.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... be of such size that there is at least 2.78 square meters (30 square feet) of deck area and a volume of at least 5.8 cubic meters (210 cubic feet) for each person accommodated. The clear head room shall... another. The berth must be composed of materials not likely to corrode. The overall size of a berth must...

  20. Space Operations Center, shuttle interaction study, volume 1

    NASA Technical Reports Server (NTRS)

    1981-01-01

    The feasibility of the shuttle remote manipulator system (SRMS)-aided space operations center (SOC)/orbiter berthing was evaluated to determine: (1) whether the initial rates between the SOC and the orbiter can be removed by the arm; (2) what is the best strategy to be used; (3) whether the post-capture and maneuvering loads are within the capability of the SRMS; (4) can the SOC berthing port be brought in the immediate proximity of the orbiter berthing port; and (5) what is the best way to remove the residual relative motions. Various notational conventions are established and various important locations on the orbiter and SOC structures are defined. Reference frames are defined together with the mass properties of both the SOC and the orbiter.

  1. 46 CFR 32.40-20 - Sleeping accommodations-T/ALL.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... must be of such size that there is at least 2.78 square meters (30 square feet) of deck area and a volume of at least 5.8 cubic meters (210 cubic feet) for each person accommodated. The clear head room... another. The berth must be composed of materials not likely to corrode. The overall size of a berth must...

  2. 46 CFR 32.40-20 - Sleeping accommodations-T/ALL.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... must be of such size that there is at least 2.78 square meters (30 square feet) of deck area and a volume of at least 5.8 cubic meters (210 cubic feet) for each person accommodated. The clear head room... another. The berth must be composed of materials not likely to corrode. The overall size of a berth must...

  3. 65. Photocopy of General Arrangement, Crew's Mess & Berthing Space, ...

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

    65. Photocopy of General Arrangement, Crew's Mess & Berthing Space, Wash Room, Galley & Galley Stores. Basalt Rock Co. Inc., Shipbuilding Division, Napa, California. Coast Guard Headquarters Drawing No.540-WAGL-3306-1, dated January 1943. Original drawing property of the U.S. Coast Guard. - U.S. Coast Guard Cutter WHITE HEATH, USGS Integrated Support Command Boston, 427 Commercial Street, Boston, Suffolk County, MA

  4. a Floating Mobile Quay for Super Container Ships in a Hub Port

    NASA Astrophysics Data System (ADS)

    Chae, Jang-Won; Park, Woo-Sun

    A floating mobile quay (FMQ), which is an innovative berth system, has functions of not only both side loading/unloading but also direct transshipment to feeder ships in a hub port. Applying the FMQ to a hub port such as the west terminal of Busan New Port of Korea, it is shown from a physical modeling and field model test that the quay is dynamically stable and workable in the prevailing wave condition and also safe in a design storm condition, respectively. The terminal productivity is increased by 30% comparing with the present land based berth. The B/C ratio of the new berth system is evaluated as 1.13 considering super-large container ships. It appears that the FMQ is a technically and economically feasible system in the hub port.

  5. 46 CFR 72.20-90 - Vessels contracted for prior to November 19, 1952.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... reasonable and practicable, a minimum of 1 toilet, shower, and washbasin must be provided for each 10 members of the crew or fraction thereof. (3) Crew spaces must have a volume of at least 3.4 cubic meters (120... space for the exclusive use of the sick or injured. Berths must be provided in the ratio of 1 berth for...

  6. 46 CFR 72.20-90 - Vessels contracted for prior to November 19, 1952.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... reasonable and practicable, a minimum of 1 toilet, shower, and washbasin must be provided for each 10 members of the crew or fraction thereof. (3) Crew spaces must have a volume of at least 3.4 cubic meters (120... space for the exclusive use of the sick or injured. Berths must be provided in the ratio of 1 berth for...

  7. 46 CFR 72.20-90 - Vessels contracted for prior to November 19, 1952.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... reasonable and practicable, a minimum of 1 toilet, shower, and washbasin must be provided for each 10 members of the crew or fraction thereof. (3) Crew spaces must have a volume of at least 3.4 cubic meters (120... space for the exclusive use of the sick or injured. Berths must be provided in the ratio of 1 berth for...

  8. 46 CFR 72.20-90 - Vessels contracted for prior to November 19, 1952.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... reasonable and practicable, a minimum of 1 toilet, shower, and washbasin must be provided for each 10 members of the crew or fraction thereof. (3) Crew spaces must have a volume of at least 3.4 cubic meters (120... space for the exclusive use of the sick or injured. Berths must be provided in the ratio of 1 berth for...

  9. 46 CFR 72.20-90 - Vessels contracted for prior to November 19, 1952.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... reasonable and practicable, a minimum of 1 toilet, shower, and washbasin must be provided for each 10 members of the crew or fraction thereof. (3) Crew spaces must have a volume of at least 3.4 cubic meters (120... space for the exclusive use of the sick or injured. Berths must be provided in the ratio of 1 berth for...

  10. 33 CFR 334.1050 - Oakland Outer Harbor adjacent to the Military Ocean Terminal, Bay Area, Pier No. 8 (Port of...

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... the Military Ocean Terminal, Bay Area, Pier No. 8 (Port of Oakland Berth No. 10); restricted area. 334..., DEPARTMENT OF DEFENSE DANGER ZONE AND RESTRICTED AREA REGULATIONS § 334.1050 Oakland Outer Harbor adjacent to the Military Ocean Terminal, Bay Area, Pier No. 8 (Port of Oakland Berth No. 10); restricted area. (a...

  11. 33 CFR 334.1050 - Oakland Outer Harbor adjacent to the Military Ocean Terminal, Bay Area, Pier No. 8 (Port of...

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... the Military Ocean Terminal, Bay Area, Pier No. 8 (Port of Oakland Berth No. 10); restricted area. 334..., DEPARTMENT OF DEFENSE DANGER ZONE AND RESTRICTED AREA REGULATIONS § 334.1050 Oakland Outer Harbor adjacent to the Military Ocean Terminal, Bay Area, Pier No. 8 (Port of Oakland Berth No. 10); restricted area. (a...

  12. 33 CFR 334.1050 - Oakland Outer Harbor adjacent to the Military Ocean Terminal, Bay Area, Pier No. 8 (Port of...

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... the Military Ocean Terminal, Bay Area, Pier No. 8 (Port of Oakland Berth No. 10); restricted area. 334..., DEPARTMENT OF DEFENSE DANGER ZONE AND RESTRICTED AREA REGULATIONS § 334.1050 Oakland Outer Harbor adjacent to the Military Ocean Terminal, Bay Area, Pier No. 8 (Port of Oakland Berth No. 10); restricted area. (a...

  13. 33 CFR 334.1050 - Oakland Outer Harbor adjacent to the Military Ocean Terminal, Bay Area, Pier No. 8 (Port of...

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... the Military Ocean Terminal, Bay Area, Pier No. 8 (Port of Oakland Berth No. 10); restricted area. 334..., DEPARTMENT OF DEFENSE DANGER ZONE AND RESTRICTED AREA REGULATIONS § 334.1050 Oakland Outer Harbor adjacent to the Military Ocean Terminal, Bay Area, Pier No. 8 (Port of Oakland Berth No. 10); restricted area. (a...

  14. 33 CFR 334.1050 - Oakland Outer Harbor adjacent to the Military Ocean Terminal, Bay Area, Pier No. 8 (Port of...

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... the Military Ocean Terminal, Bay Area, Pier No. 8 (Port of Oakland Berth No. 10); restricted area. 334..., DEPARTMENT OF DEFENSE DANGER ZONE AND RESTRICTED AREA REGULATIONS § 334.1050 Oakland Outer Harbor adjacent to the Military Ocean Terminal, Bay Area, Pier No. 8 (Port of Oakland Berth No. 10); restricted area. (a...

  15. Berthing mechanism final test report and program assessment

    NASA Technical Reports Server (NTRS)

    1988-01-01

    The purpose is to document the testing performed on both hardware and software developed under the Space Station Berthing Mechanisms Program. Testing of the mechanism occurred at three locations. Several system components, e.g., actuators and computer systems, were functionally tested before assembly. A series of post assembly tests were performed. The post assembly tests, as well as the dynamic testing of the mechanism, are presented.

  16. Hardware interface for isolation of vibrations in flexible manipulators: Development and applications

    NASA Technical Reports Server (NTRS)

    Manouchehri, Davoud; Lindsay, Thomas; Ghosh, David

    1994-01-01

    NASA's Langley Research Center (LaRC) is addressing the problem of isolating the vibrations of the Shuttle remote manipulator system (RMS) from its end-effector and/or payload by modeling an RMS flat-floor simulator with a dynamic payload. Analysis of the model can lead to control techniques that will improve the speed, accuracy, and safety of the RMS in capturing satellites and eventually facilitate berthing with the space station. Rockwell International Corporation, also involved in vibration isolation, has developed a hardware interface unit to isolate the end-effector from the vibrations of an arm on a Shuttle robotic tile processing system (RTPS). To apply the RTPS isolation techniques to long-reach arms like the RMS, engineers have modeled the dynamics of the hardware interface unit with simulation software. By integrating the Rockwell interface model with the NASA LaRC RMS simulator model, investigators can study the use of a hardware interface to isolate dynamic payloads from the RMS. The interface unit uses both active and passive compliance and damping for vibration isolation. Thus equipped, the RMS could be used as a telemanipulator with control characteristics for capture and berthing operations. The hardware interface also has applications in industry.

  17. Automatic satellite capture and berthing with robot arm (ASCABRA)

    NASA Technical Reports Server (NTRS)

    Inaba, Noriyasu; Wakabayashi, Yasufumi; Iijima, Takahiko

    1994-01-01

    The NASDA office of R&D is studying an automatic technique to capture and berth free-floating satellites using a robot arm on another satellite. A demonstration experiment plan with the Japanese engineering test satellite ETS-7 is being developed based on the basic research on the ground. The overview and key technologies of this experiment plan are presented, and future applications of the automatic capture technique are also reviewed.

  18. Investigation into Deep-Draft Vessel Berthing Problems at Selected U. S. Naval Facilities.

    DTIC Science & Technology

    1980-10-01

    AOR I WICHITA Alameda, CA 1-24-75 AOR 2 MILWAUKEE Norfolk, VA 1-01-74 AOR 3 KANSAS CITY Alameda, CA 2-16-74 AOR 4 SAVANNAH Norfolk, VA 12-05-70 AOR...auger-cutter assembly dislodges and delivers the material to the pump suction intake. The slurry is pumped to a pipeline for transmission to a remote...complete loss of control of the course steered. Large current eddies having the same effect are found in the vicinity of the foundation piers of the San

  19. NREL MOIS Data for NWEI Azura May 2016

    DOE Data Explorer

    Eric Nelson

    2016-06-07

    NREL MOIS data files for the Azura grid-connected deployment at the 30-meter berth of the US Navy's Wave Energy Test Site (WETS 30m Site) at the Kaneohe Marine Corps Base Hawaii (MCBH) on the windward (northeast) coast of the island of Oahu, HI. See general documentation describing specifics of the data files and formats in a separate NREL submission (linked below). Note: DMS, load cell, and analog data files were not collected during the month of May, 2016 due to a controller software problem that was resolved in early June 2016.

  20. Dragon crew shots

    NASA Image and Video Library

    2012-10-10

    ISS033-E-011279 (10 Oct. 2012) --- NASA astronaut Sunita Williams, Expedition 33 commander; and Japan Aerospace Exploration Agency astronaut Aki Hoshide, flight engineer, work the controls at the robotics workstation in the International Space Station’s seven-windowed Cupola during the rendezvous and berthing of the SpaceX Dragon commercial cargo craft. Using the Canadarm2 robotic arm, Williams and Hoshide captured and berthed Dragon to the Earth-facing side of the Harmony node Oct. 10, 2012.

  1. Robot arm system for automatic satellite capture and berthing

    NASA Technical Reports Server (NTRS)

    Nishida, Shinichiro; Toriu, Hidetoshi; Hayashi, Masato; Kubo, Tomoaki; Miyata, Makoto

    1994-01-01

    Load control is one of the most important technologies for capturing and berthing free flying satellites by a space robot arm because free flying satellites have different motion rates. The performance of active compliance control techniques depend on the location of the force sensor and the arm's structural compliance. A compliance control technique for the robot arm's structural elasticity and a consideration for an end-effector appropriate for it are presented in this paper.

  2. Dragon Spacecraft Approaches ISS

    NASA Image and Video Library

    2012-05-25

    ISS031-E-070943 (25 May 2012) --- Backdropped against the Namib Desert on the Atlantic coast of Namibia, the SpaceX Dragon commercial cargo craft approaches the International Space Station on May 25, 2012 for grapple and berthing. Expedition 31 Flight Engineers Don Pettit and Andre Kuipers grappled Dragon at 9:56 a.m. (EDT) with the Canadarm2 robotic arm and used the robotic arm to berth Dragon to the Earth-facing side of the station's Harmony node at 12:02 p.m.

  3. Dragon Spacecraft on Approach to the ISS

    NASA Image and Video Library

    2014-04-20

    ISS039-E-013552 (20 April 2014) --- This is one of an extensive series of still photos documenting the April 20 arrival and ultimate capture and berthing of the SpaceX Dragon at the International Space Station, as photographed by the Expedition 39 crew members onboard the orbital outpost. In this photo, the two orbiting spacecraft were above a point in Yemen. The Dragon spacecraft was captured by the space station and successfully berthed using the Canadian-built space station remote manipulator system or Canadarm2.

  4. View of HTV3 berthed to Node 2

    NASA Image and Video Library

    2012-07-27

    ISS032-E-010473 (27 July 2012) --- The unpiloted Japan Aerospace Exploration Agency (JAXA) H-II Transfer Vehicle (HTV-3) is featured in this image photographed by an Expedition 32 crew member shortly after the HTV-3 was berthed to the Earth-facing port of the International Space Station's Harmony node using the Canadarm2 robotic arm. The attachment was completed at 10:34 a.m. (EDT) on July 27, 2012. Earth?s horizon and the blackness of space provide the backdrop for the scene.

  5. View of HTV3 berthed to Node 2

    NASA Image and Video Library

    2012-07-27

    ISS032-E-010464 (27 July 2012) --- The unpiloted Japan Aerospace Exploration Agency (JAXA) H-II Transfer Vehicle (HTV-3) is featured in this image photographed by an Expedition 32 crew member shortly after the HTV-3 was berthed to the Earth-facing port of the International Space Station's Harmony node using the Canadarm2 robotic arm. The attachment was completed at 10:34 a.m. (EDT) on July 27, 2012. Earth?s horizon and the blackness of space provide the backdrop for the scene.

  6. View of HTV3 berthed to Node 2

    NASA Image and Video Library

    2012-07-27

    ISS032-E-010476 (27 July 2012) --- The unpiloted Japan Aerospace Exploration Agency (JAXA) H-II Transfer Vehicle (HTV-3) is featured in this image photographed by an Expedition 32 crew member shortly after the HTV-3 was berthed to the Earth-facing port of the International Space Station's Harmony node using the Canadarm2 robotic arm. The attachment was completed at 10:34 a.m. (EDT) on July 27, 2012. Earth?s horizon and the blackness of space provide the backdrop for the scene.

  7. Research on allocation efficiency of the daisy chain allocation algorithm

    NASA Astrophysics Data System (ADS)

    Shi, Jingping; Zhang, Weiguo

    2013-03-01

    With the improvement of the aircraft performance in reliability, maneuverability and survivability, the number of the control effectors increases a lot. How to distribute the three-axis moments into the control surfaces reasonably becomes an important problem. Daisy chain method is simple and easy to be carried out in the design of the allocation system. But it can not solve the allocation problem for entire attainable moment subset. For the lateral-directional allocation problem, the allocation efficiency of the daisy chain can be directly measured by the area of its subset of attainable moments. Because of the non-linear allocation characteristic, the subset of attainable moments of daisy-chain method is a complex non-convex polygon, and it is difficult to solve directly. By analyzing the two-dimensional allocation problems with a "micro-element" idea, a numerical calculation algorithm is proposed to compute the area of the non-convex polygon. In order to improve the allocation efficiency of the algorithm, a genetic algorithm with the allocation efficiency chosen as the fitness function is proposed to find the best pseudo-inverse matrix.

  8. A trust-based sensor allocation algorithm in cooperative space search problems

    NASA Astrophysics Data System (ADS)

    Shen, Dan; Chen, Genshe; Pham, Khanh; Blasch, Erik

    2011-06-01

    Sensor allocation is an important and challenging problem within the field of multi-agent systems. The sensor allocation problem involves deciding how to assign a number of targets or cells to a set of agents according to some allocation protocol. Generally, in order to make efficient allocations, we need to design mechanisms that consider both the task performers' costs for the service and the associated probability of success (POS). In our problem, the costs are the used sensor resource, and the POS is the target tracking performance. Usually, POS may be perceived differently by different agents because they typically have different standards or means of evaluating the performance of their counterparts (other sensors in the search and tracking problem). Given this, we turn to the notion of trust to capture such subjective perceptions. In our approach, we develop a trust model to construct a novel mechanism that motivates sensor agents to limit their greediness or selfishness. Then we model the sensor allocation optimization problem with trust-in-loop negotiation game and solve it using a sub-game perfect equilibrium. Numerical simulations are performed to demonstrate the trust-based sensor allocation algorithm in cooperative space situation awareness (SSA) search problems.

  9. International Space Station Powered Bolt Nut Anomaly and Failure Analysis Summary

    NASA Technical Reports Server (NTRS)

    Sievers, Daniel E.; Warden, Harry K.

    2010-01-01

    A key mechanism used in the on-orbit assembly of the International Space Station (ISS) pressurized elements is the Common Berthing Mechanism. The mechanism that effects the structural connection of the Common Berthing Mechanism halves is the Powered Bolt Assembly. There are sixteen Powered Bolt Assemblies per Common Berthing Mechanism. The Common Berthing Mechanism has a bolt which engages a self aligning Powered Bolt Nut (PBN) on the mating interface (Figure 1). The Powered Bolt Assemblies are preloaded to approximately 84.5 kN (19000 lb) prior to pressurization of the CBM. The PBNs mentioned below, manufactured in 2009, will be used on ISS future missions. An on orbit functional failure of this hardware would be unacceptable and in some instances catastrophic due to the failure of modules to mate and seal the atmosphere, risking loss of crew and ISS functions. The manufacturing processes that create the PBNs need to be strictly controlled. Functional (torque vs. tension) acceptance test failures will be the result of processes not being strictly followed. Without the proper knowledge of thread tolerances, fabrication techniques, and dry film lubricant application processes, PBNs will be, and have been manufactured improperly. The knowledge gained from acceptance test failures and the resolution of those failures, thread fabrication techniques and thread dry film lubrication processes can be applied to many aerospace mechanisms to enhance their performance. Test data and manufactured PBN thread geometry will be discussed for both failed and successfully accepted PBNs.

  10. The connector space reduction mechanism

    NASA Technical Reports Server (NTRS)

    Milam, M. Bruce

    1990-01-01

    The Connector Space Reduction Mechanism (CSRM) is a simple device that can reduce the number of electromechanical devices on the Payload Interface Adapter/Station Interface Adapter (PIA/SIA) from 4 to 1. The device uses simplicity to attack the heart of the connector mating problem for large interfaces. The CSRM allows blind mate connector mating with minimal alignment required over short distances. This eliminates potential interface binding problems and connector damage. The CSRM is compatible with G and H connectors and Moog Rotary Shutoff fluid couplings. The CSRM can be used also with less forgiving connectors, as was demonstrated in the lab. The CSRM is NASA-Goddard exclusive design with patent applied for. The CSRM is the correct mechanism for the PIA/SIA interface as well as other similar berthing interfaces.

  11. A group-based tasks allocation algorithm for the optimization of long leave opportunities in academic departments

    NASA Astrophysics Data System (ADS)

    Eyono Obono, S. D.; Basak, Sujit Kumar

    2011-12-01

    The general formulation of the assignment problem consists in the optimal allocation of a given set of tasks to a workforce. This problem is covered by existing literature for different domains such as distributed databases, distributed systems, transportation, packets radio networks, IT outsourcing, and teaching allocation. This paper presents a new version of the assignment problem for the allocation of academic tasks to staff members in departments with long leave opportunities. It presents the description of a workload allocation scheme and its algorithm, for the allocation of an equitable number of tasks in academic departments where long leaves are necessary.

  12. Dragon Spacecraft on Approach to ISS

    NASA Image and Video Library

    2014-04-20

    ISS039-E-013405 (20 April 2014) --- This is one of an extensive series of still photos documenting the April 20 arrival and ultimate capture and berthing of the SpaceX Dragon at the International Space Station, as photographed by the Expedition 39 crew members onboard the orbital outpost. The two orbiting spacecraft were above a point in the Gulf of Aden near the Red Sea, off the coast of Yemen. The Dragon spacecraft was captured by the space station and successfully berthed using the Canadian-built space station remote manipulator system or Canadarm2.

  13. PRACTICAL: Planning and Resource Allocation in C2-Domains With Time Critical Algorithms (PRACTICAL: Planning en Allocatie in C2-Domeinen Met Tijdkritische Algoritmen)

    DTIC Science & Technology

    1993-02-01

    the (re)planning framework, incorporating the demonstrators CALIGULA and ALLOCATOR for resource allocation and scheduling respectively. In the Command...demonstrator CALIGULA for the problem of allocating frequencies to a radio link network. The problems in the domain of scheduling are dealt with. which has...demonstrating the (re)planning framework, incorporating the demonstrators CALIGULA and ALLOCATOR for resource allocation and scheduling respectively

  14. Vehicle routing problem and capacitated vehicle routing problem frameworks in fund allocation problem

    NASA Astrophysics Data System (ADS)

    Mamat, Nur Jumaadzan Zaleha; Jaaman, Saiful Hafizah; Ahmad, Rokiah@Rozita

    2016-11-01

    Two new methods adopted from methods commonly used in the field of transportation and logistics are proposed to solve a specific issue of investment allocation problem. Vehicle routing problem and capacitated vehicle routing methods are applied to optimize the fund allocation of a portfolio of investment assets. This is done by determining the sequence of the assets. As a result, total investment risk is minimized by this sequence.

  15. Modelling and simulation of Space Station Freedom berthing dynamics and control

    NASA Technical Reports Server (NTRS)

    Cooper, Paul A.; Garrison, James L., Jr.; Montgomery, Raymond C.; Wu, Shih-Chin; Stockwell, Alan E.; Demeo, Martha E.

    1994-01-01

    A large-angle, flexible, multibody, dynamic modeling capability has been developed to help validate numerical simulations of the dynamic motion and control forces which occur during berthing of Space Station Freedom to the Shuttle Orbiter in the early assembly flights. This paper outlines the dynamics and control of the station, the attached Shuttle Remote Manipulator System, and the orbiter. The simulation tool developed for the analysis is described and the results of two simulations are presented. The first is a simulated maneuver from a gravity-gradient attitude to a torque equilibrium attitude using the station reaction control jets. The second simulation is the berthing of the station to the orbiter with the station control moment gyros actively maintaining an estimated torque equilibrium attitude. The influence of the elastic dynamic behavior of the station and of the Remote Manipulator System on the attitude control of the station/orbiter system during each maneuver was investigated. The flexibility of the station and the arm were found to have only a minor influence on the attitude control of the system during the maneuvers.

  16. Using Paraffin with -10 deg C to 10 deg C Melting Point for Payload Thermal Energy Storage in SpaceX Dragon Trunk

    NASA Technical Reports Server (NTRS)

    Choi, Michael K.

    2013-01-01

    A concept of using paraffin wax phase change material (PCM) with a melting point between -10 deg C and 10 deg C for payload thermal energy storage in a Space Exploration Technologies (SpaceX) Dragon trunk is presented. It overcomes the problem of limited heater power available to a payload with significant radiators when the Dragon is berthed to the International Space Station (ISS). It stores adequate thermal energy to keep a payload warm without power for 6 hours during the transfer from the Dragon to an ExPRESS logistics carrier (ELC) on the ISS.

  17. Dragon Spacecraft on Approach to the ISS

    NASA Image and Video Library

    2014-04-20

    ISS039-E-013569 (20 April 2014) --- This is one of an extensive series of still photos documenting the April 20 arrival and ultimate capture and berthing of the SpaceX Dragon at the International Space Station, as photographed by the Expedition 39 crew members onboard the orbital outpost. In this photo, the two orbiting spacecraft were above a point in Yemen. Part of the Gulf of Aden and the Red Sea, can be seen at left. The Dragon spacecraft was captured by the space station and successfully berthed using the Canadian-built space station remote manipulator system or Canadarm2.

  18. Dragon Spacecraft on Approach to the ISS

    NASA Image and Video Library

    2014-04-20

    ISS039-E-013570 (20 April 2014) --- This is one of an extensive series of still photos documenting the April 20 arrival and ultimate capture and berthing of the SpaceX Dragon at the International Space Station, as photographed by the Expedition 39 crew members onboard the orbital outpost. In this photo, the two orbiting spacecraft were above a point in Yemen. Part of the Gulf of Aden and the Red Sea, can be seen at left. The Dragon spacecraft was captured by the space station and successfully berthed using the Canadian-built space station remote manipulator system or Canadarm2.

  19. Dragon Spacecraft on Approach to the ISS

    NASA Image and Video Library

    2014-04-20

    ISS039-E-013566 (20 April 2014) --- This is one of an extensive series of still photos documenting the April 20 arrival and ultimate capture and berthing of the SpaceX Dragon at the International Space Station, as photographed by the Expedition 39 crew members onboard the orbital outpost. In this photo, the two orbiting spacecraft were above a point in Yemen. Part of the Gulf of Aden and the Red Sea can be seen at left. The Dragon spacecraft was captured by the space station and successfully berthed using the Canadian-built space station remote manipulator system or Canadarm2.

  20. Dragon Spacecraft on Approach to the ISS

    NASA Image and Video Library

    2014-04-20

    ISS039-E-013567 (20 April 2014) --- This is one of an extensive series of still photos documenting the April 20 arrival and ultimate capture and berthing of the SpaceX Dragon at the International Space Station, as photographed by the Expedition 39 crew members onboard the orbital outpost. In this photo, the two orbiting spacecraft were above a point in Yemen. Part of the Gulf of Aden and the Red Sea, can be seen at left. The Dragon spacecraft was captured by the space station and successfully berthed using the Canadian-built space station remote manipulator system or Canadarm2.

  1. Research on air and missile defense task allocation based on extended contract net protocol

    NASA Astrophysics Data System (ADS)

    Zhang, Yunzhi; Wang, Gang

    2017-10-01

    Based on the background of air and missile defense distributed element corporative engagement, the interception task allocation problem of multiple weapon units with multiple targets under network condition is analyzed. Firstly, a mathematical model of task allocation is established by combat task decomposition. Secondly, the initialization assignment based on auction contract and the adjustment allocation scheme based on swap contract were introduced to the task allocation. Finally, through the simulation calculation of typical situation, the model can be used to solve the task allocation problem in complex combat environment.

  2. Dynamic resource allocation in a hierarchical multiprocessor system: A preliminary study

    NASA Technical Reports Server (NTRS)

    Ngai, Tin-Fook

    1986-01-01

    An integrated system approach to dynamic resource allocation is proposed. Some of the problems in dynamic resource allocation and the relationship of these problems to system structures are examined. A general dynamic resource allocation scheme is presented. A hierarchial system architecture which dynamically maps between processor structure and programs at multiple levels of instantiations is described. Simulation experiments were conducted to study dynamic resource allocation on the proposed system. Preliminary evaluation based on simple dynamic resource allocation algorithms indicates that with the proposed system approach, the complexity of dynamic resource management could be significantly reduced while achieving reasonable effective dynamic resource allocation.

  3. Models of resource allocation optimization when solving the control problems in organizational systems

    NASA Astrophysics Data System (ADS)

    Menshikh, V.; Samorokovskiy, A.; Avsentev, O.

    2018-03-01

    The mathematical model of optimizing the allocation of resources to reduce the time for management decisions and algorithms to solve the general problem of resource allocation. The optimization problem of choice of resources in organizational systems in order to reduce the total execution time of a job is solved. This problem is a complex three-level combinatorial problem, for the solving of which it is necessary to implement the solution to several specific problems: to estimate the duration of performing each action, depending on the number of performers within the group that performs this action; to estimate the total execution time of all actions depending on the quantitative composition of groups of performers; to find such a distribution of the existing resource of performers in groups to minimize the total execution time of all actions. In addition, algorithms to solve the general problem of resource allocation are proposed.

  4. Location-allocation models and new solution methodologies in telecommunication networks

    NASA Astrophysics Data System (ADS)

    Dinu, S.; Ciucur, V.

    2016-08-01

    When designing a telecommunications network topology, three types of interdependent decisions are combined: location, allocation and routing, which are expressed by the following design considerations: how many interconnection devices - consolidation points/concentrators should be used and where should they be located; how to allocate terminal nodes to concentrators; how should the voice, video or data traffic be routed and what transmission links (capacitated or not) should be built into the network. Including these three components of the decision into a single model generates a problem whose complexity makes it difficult to solve. A first method to address the overall problem is the sequential one, whereby the first step deals with the location-allocation problem and based on this solution the subsequent sub-problem (routing the network traffic) shall be solved. The issue of location and allocation in a telecommunications network, called "The capacitated concentrator location- allocation - CCLA problem" is based on one of the general location models on a network in which clients/demand nodes are the terminals and facilities are the concentrators. Like in a location model, each client node has a demand traffic, which must be served, and the facilities can serve these demands within their capacity limit. In this study, the CCLA problem is modeled as a single-source capacitated location-allocation model whose optimization objective is to determine the minimum network cost consisting of fixed costs for establishing the locations of concentrators, costs for operating concentrators and costs for allocating terminals to concentrators. The problem is known as a difficult combinatorial optimization problem for which powerful algorithms are required. Our approach proposes a Fuzzy Genetic Algorithm combined with a local search procedure to calculate the optimal values of the location and allocation variables. To confirm the efficiency of the proposed algorithm with respect to the quality of solutions, significant size test problems were considered: up to 100 terminal nodes and 50 concentrators on a 100 × 100 square grid. The performance of this hybrid intelligent algorithm was evaluated by measuring the quality of its solutions with respect to the following statistics: the standard deviation and the ratio of the best solution obtained.

  5. Conceptual Designs for Berthing Pier Galleries and Deck Lighting.

    DTIC Science & Technology

    1983-06-01

    to 100 feet wide and 1,200 feet long, providing four 600-foot-long berths. o For des ign purposes, a pier should accommodate a maximum of eight ships...points4. It identifies the locrit ion aind 01 ovat ion otf eajch service for oarih des igo ship frht tror and port si d-. Th is, wais used tO de to rino t...rung a n I or ea chI 11li O!l ip11), :id pos it ion i g moo r inig f it t ings alIong the p)iecr t o prope-rly, .ree;,modrite all of the des ;ign clalss

  6. Safety recommendations and responses availability. [Training of shipmasters in automated radar plotting

    DOE Office of Scientific and Technical Information (OSTI.GOV)

    Not Available

    1980-09-25

    The U.S. National Transportation Safety Board (NTSB) has recommended that the U.S. Coast Guard (USCG) and Exxon Co. USA require shipmasters assigned to a vessel equipped with an automated radar plotting aid to complete an approved training course before assignment to avoid the recurrence of accidents similar to the collision of the Exxon Chester tankship and the Regal Sword Liberian freighter in the Atlantic Ocean near Cape Cod, Massachusetts, on 6/18/79. Following the explosion, burning, and sinking of the Liberian tankship, Seatiger, at a Sun Oil Terminal Inc. berth in Nederland, Texas on 4/19/79, NTSB also urged USCG to requiremore » foreign and domestic crude oil tankers of 20,000 dwt and above that are equipped with inert systems to place these systems in operation while in US waters, except when cargo tanks are gas-free; instructed Sun Oil Terminals Inc. to provide an emergency communication system between berthed vessels and its terminal office during communication system between berthed vessels and its terminal office during cargo discharging; and recommended that the American Bureau of Shipping instruct tanker surveyors to examine flame screens. Other safety recommendations and responses by federal agencies are also discussed.« less

  7. A game-theoretical pricing mechanism for multiuser rate allocation for video over WiMAX

    NASA Astrophysics Data System (ADS)

    Chen, Chao-An; Lo, Chi-Wen; Lin, Chia-Wen; Chen, Yung-Chang

    2010-07-01

    In multiuser rate allocation in a wireless network, strategic users can bias the rate allocation by misrepresenting their bandwidth demands to a base station, leading to an unfair allocation. Game-theoretical approaches have been proposed to address the unfair allocation problems caused by the strategic users. However, existing approaches rely on a timeconsuming iterative negotiation process. Besides, they cannot completely prevent unfair allocations caused by inconsistent strategic behaviors. To address these problems, we propose a Search Based Pricing Mechanism to reduce the communication time and to capture a user's strategic behavior. Our simulation results show that the proposed method significantly reduce the communication time as well as converges stably to an optimal allocation.

  8. Stochastic Optimization For Water Resources Allocation

    NASA Astrophysics Data System (ADS)

    Yamout, G.; Hatfield, K.

    2003-12-01

    For more than 40 years, water resources allocation problems have been addressed using deterministic mathematical optimization. When data uncertainties exist, these methods could lead to solutions that are sub-optimal or even infeasible. While optimization models have been proposed for water resources decision-making under uncertainty, no attempts have been made to address the uncertainties in water allocation problems in an integrated approach. This paper presents an Integrated Dynamic, Multi-stage, Feedback-controlled, Linear, Stochastic, and Distributed parameter optimization approach to solve a problem of water resources allocation. It attempts to capture (1) the conflict caused by competing objectives, (2) environmental degradation produced by resource consumption, and finally (3) the uncertainty and risk generated by the inherently random nature of state and decision parameters involved in such a problem. A theoretical system is defined throughout its different elements. These elements consisting mainly of water resource components and end-users are described in terms of quantity, quality, and present and future associated risks and uncertainties. Models are identified, modified, and interfaced together to constitute an integrated water allocation optimization framework. This effort is a novel approach to confront the water allocation optimization problem while accounting for uncertainties associated with all its elements; thus resulting in a solution that correctly reflects the physical problem in hand.

  9. An improved risk-explicit interval linear programming model for pollution load allocation for watershed management.

    PubMed

    Xia, Bisheng; Qian, Xin; Yao, Hong

    2017-11-01

    Although the risk-explicit interval linear programming (REILP) model has solved the problem of having interval solutions, it has an equity problem, which can lead to unbalanced allocation between different decision variables. Therefore, an improved REILP model is proposed. This model adds an equity objective function and three constraint conditions to overcome this equity problem. In this case, pollution reduction is in proportion to pollutant load, which supports balanced development between different regional economies. The model is used to solve the problem of pollution load allocation in a small transboundary watershed. Compared with the REILP original model result, our model achieves equity between the upstream and downstream pollutant loads; it also overcomes the problem of greatest pollution reduction, where sources are nearest to the control section. The model provides a better solution to the problem of pollution load allocation than previous versions.

  10. ISS Quasi-steady Accelerometric Data as a Tool for the Detection of External Disturbances During the Period 2009-2016

    NASA Astrophysics Data System (ADS)

    Marín, M.; Dubert, D.; Simón, M. J.; Ollé, J.; Gavaldà, Jna.; Ruiz, X.

    2018-04-01

    The present work aims to investigate the degree of correlation existing between the information contained in the ISS reduced quasi-steady accelerometric data and different external mechanical disturbances (reboostings, dockings/undockings, berthings/deberthings and Extra Vehicular Activities), compiled for the period 2009 to 2016. The eight hour mean (Mean8h) and the eight hour root mean square (RMS8h) acceleration values, considered as reduced data, have been extracted from the quasi-steady records provided by NASA Principal Investigator Microgravity Services website. The advantage of applying the present strategy is to drastically reduce the amount of information to be processed all along these eight years. The Mean8h values have been used for the evaluation of trends as function of time while the RMS8h ones were used to define the level (weak, medium and strong) of the different kind of external mechanical disturbances considered. These criteria has been applied for approximately four hundred selected disturbances, compiled in the Appendix. Results indicate that reboosting is always detected as a strong disturbance, while dockings/undockings, as weak ones, having lower, though detectable level, depending on the type of spacecraft considered. Extra Vehicular Activities are undetectable by the use of this reduced quasi-steady approach. The inverse problem, in other words, knowing the value of the RMS8h one could try to predict the kind of disturbance responsible of it, is thus feasible except for berthing/deberthings and Extra Vehicular Activities.

  11. Simulation for assessment of bulk cargo berths number

    NASA Astrophysics Data System (ADS)

    Kuznetsov, A. L.; Kirichenko, A. V.; Slitsan, A. E.

    2017-10-01

    The world trade volumes of mineral resources have been growing constantly for decades, notwithstanding any economical crises. At the same time, the proximity of the bulk materials as products to the starting point of the integrated value added or logistic supply chain makes their unit price relatively low. This fact automatically causes a strong economic sensitivity of the supply chain to the level of operational expenses in every link. The core of the integrated logistic supply chain is its maritime segment, with the fleet and terminals (i.e. the cargo transportation system) serving as the base platform for it. In its turn, the terminal berths play a role of the interface between the fleet and the land-transportation sub-system. Current development of the maritime transportation technologies, ships and terminal specialization, vessel size growth, rationalization of route patterns, regionalization of trade etc., has made conventional calculation methods inadequate. The solution of the problem is in using object oriented simulation. At the same time, this approch usually assumes only ad hoc models. Thus, it does not provide the generality of its conventional analytical predecessors. The time and labor consumpting procedure of simulation results in a very narrow application domain of the model. This article describes a new simulation instrument, combining the generality of the analytical technoques with the efficiency of the object-oriented simulation. The approach implemented as a software module, which validity and adequacy are proved. The software was tested on several sea terminal design projects and confirmed its efficiency.

  12. A robust optimisation approach to the problem of supplier selection and allocation in outsourcing

    NASA Astrophysics Data System (ADS)

    Fu, Yelin; Keung Lai, Kin; Liang, Liang

    2016-03-01

    We formulate the supplier selection and allocation problem in outsourcing under an uncertain environment as a stochastic programming problem. Both the decision-maker's attitude towards risk and the penalty parameters for demand deviation are considered in the objective function. A service level agreement, upper bound for each selected supplier's allocation and the number of selected suppliers are considered as constraints. A novel robust optimisation approach is employed to solve this problem under different economic situations. Illustrative examples are presented with managerial implications highlighted to support decision-making.

  13. Analog Processor To Solve Optimization Problems

    NASA Technical Reports Server (NTRS)

    Duong, Tuan A.; Eberhardt, Silvio P.; Thakoor, Anil P.

    1993-01-01

    Proposed analog processor solves "traveling-salesman" problem, considered paradigm of global-optimization problems involving routing or allocation of resources. Includes electronic neural network and auxiliary circuitry based partly on concepts described in "Neural-Network Processor Would Allocate Resources" (NPO-17781) and "Neural Network Solves 'Traveling-Salesman' Problem" (NPO-17807). Processor based on highly parallel computing solves problem in significantly less time.

  14. Development a heuristic method to locate and allocate the medical centers to minimize the earthquake relief operation time.

    PubMed

    Aghamohammadi, Hossein; Saadi Mesgari, Mohammad; Molaei, Damoon; Aghamohammadi, Hasan

    2013-01-01

    Location-allocation is a combinatorial optimization problem, and is defined as Non deterministic Polynomial Hard (NP) hard optimization. Therefore, solution of such a problem should be shifted from exact to heuristic or Meta heuristic due to the complexity of the problem. Locating medical centers and allocating injuries of an earthquake to them has high importance in earthquake disaster management so that developing a proper method will reduce the time of relief operation and will consequently decrease the number of fatalities. This paper presents the development of a heuristic method based on two nested genetic algorithms to optimize this location allocation problem by using the abilities of Geographic Information System (GIS). In the proposed method, outer genetic algorithm is applied to the location part of the problem and inner genetic algorithm is used to optimize the resource allocation. The final outcome of implemented method includes the spatial location of new required medical centers. The method also calculates that how many of the injuries at each demanding point should be taken to any of the existing and new medical centers as well. The results of proposed method showed high performance of designed structure to solve a capacitated location-allocation problem that may arise in a disaster situation when injured people has to be taken to medical centers in a reasonable time.

  15. Station Module Move in 4K Video Resolution

    NASA Image and Video Library

    2015-06-09

    Robotics flight controllers in Mission Control Houston and Canada detached the large Permanent Multipurpose Module (PMM), used as a supply depot on the orbital laboratory, from the Earth-facing port of the Unity module and robotically relocated it to the forward port of the Tranquility module. This move cleared the Unity port for its conversion into the spare berthing location for U.S. cargo spacecraft; the Earth-facing port on Harmony is the primary docking location. Harmony’s space-facing port currently is the spare berthing location for cargo vehicles, so this move frees that location to be used in conjunction with Harmony’s forward port as the arrival locations for commercial crew spacecraft.

  16. The Spartan 207 free-flyer is held in a low-hover mode above its berth in the Space Shuttle

    NASA Technical Reports Server (NTRS)

    1996-01-01

    STS-77 ESC VIEW --- The Spartan 207 free-flyer is held in a low-hover mode above its berth in the Space Shuttle Endeavour's cargo bay in the grasp of the Remote Manipulator System (RMS). The free-flyer was re-captured by the six crew members on May 21, 1996. The crew has spent a portion of the early stages of the mission in various activities involving the Spartan 207 and the related Inflatable Antenna Experiment (IAE). The Spartan project is managed by NASA's Goddard Space Flight Center (GSFC) for NASA's Office of Space Science, Washington, D.C. GMT: 09:51:29.

  17. Multiple Interacting Risk Factors: On Methods for Allocating Risk Factor Interactions.

    PubMed

    Price, Bertram; MacNicoll, Michael

    2015-05-01

    A persistent problem in health risk analysis where it is known that a disease may occur as a consequence of multiple risk factors with interactions is allocating the total risk of the disease among the individual risk factors. This problem, referred to here as risk apportionment, arises in various venues, including: (i) public health management, (ii) government programs for compensating injured individuals, and (iii) litigation. Two methods have been described in the risk analysis and epidemiology literature for allocating total risk among individual risk factors. One method uses weights to allocate interactions among the individual risk factors. The other method is based on risk accounting axioms and finding an optimal and unique allocation that satisfies the axioms using a procedure borrowed from game theory. Where relative risk or attributable risk is the risk measure, we find that the game-theory-determined allocation is the same as the allocation where risk factor interactions are apportioned to individual risk factors using equal weights. Therefore, the apportionment problem becomes one of selecting a meaningful set of weights for allocating interactions among the individual risk factors. Equal weights and weights proportional to the risks of the individual risk factors are discussed. © 2015 Society for Risk Analysis.

  18. Rate Adaptive Based Resource Allocation with Proportional Fairness Constraints in OFDMA Systems

    PubMed Central

    Yin, Zhendong; Zhuang, Shufeng; Wu, Zhilu; Ma, Bo

    2015-01-01

    Orthogonal frequency division multiple access (OFDMA), which is widely used in the wireless sensor networks, allows different users to obtain different subcarriers according to their subchannel gains. Therefore, how to assign subcarriers and power to different users to achieve a high system sum rate is an important research area in OFDMA systems. In this paper, the focus of study is on the rate adaptive (RA) based resource allocation with proportional fairness constraints. Since the resource allocation is a NP-hard and non-convex optimization problem, a new efficient resource allocation algorithm ACO-SPA is proposed, which combines ant colony optimization (ACO) and suboptimal power allocation (SPA). To reduce the computational complexity, the optimization problem of resource allocation in OFDMA systems is separated into two steps. For the first one, the ant colony optimization algorithm is performed to solve the subcarrier allocation. Then, the suboptimal power allocation algorithm is developed with strict proportional fairness, and the algorithm is based on the principle that the sums of power and the reciprocal of channel-to-noise ratio for each user in different subchannels are equal. To support it, plenty of simulation results are presented. In contrast with root-finding and linear methods, the proposed method provides better performance in solving the proportional resource allocation problem in OFDMA systems. PMID:26426016

  19. Dynamics and control of robot for capturing objects in space

    NASA Astrophysics Data System (ADS)

    Huang, Panfeng

    Space robots are expected to perform intricate tasks in future space services, such as satellite maintenance, refueling, and replacing the orbital replacement unit (ORU). To realize these missions, the capturing operation may not be avoided. Such operations will encounter some challenges because space robots have some unique characteristics unfound on ground-based robots, such as, dynamic singularities, dynamic coupling between manipulator and space base, limited energy supply and working without a fixed base, and so on. In addition, since contacts and impacts may not be avoided during capturing operation. Therefore, dynamics and control problems of space robot for capturing objects are significant research topics if the robots are to be deployed for the space services. A typical servicing operation mainly includes three phases: capturing the object, berthing and docking the object, then repairing the target. Therefore, this thesis will focus on resolving some challenging problems during capturing the object, berthing and docking, and so on. In this thesis, I study and analyze the dynamics and control problems of space robot for capturing objects. This work has potential impact in space robotic applications. I first study the contact and impact dynamics of space robot and objects. I specifically focus on analyzing the impact dynamics and mapping the relationship of influence and speed. Then, I develop the fundamental theory for planning the minimum-collision based trajectory of space robot and designing the configuration of space robot at the moment of capture. To compensate for the attitude of the space base during the capturing approach operation, a new balance control concept which can effectively balance the attitude of the space base using the dynamic couplings is developed. The developed balance control concept helps to understand of the nature of space dynamic coupling, and can be readily applied to compensate or minimize the disturbance to the space base. After capturing the object, the space robot must complete the following two tasks: one is to berth the object, and the other is to re-orientate the attitude of the whole robot system for communication and power supply. Therefore, I propose a method to accomplish these two tasks simultaneously using manipulator motion only. The ultimate goal of space services is to realize the capture and manipulation autonomously. Therefore, I propose an affective approach based on learning human skill to track and capture the objects automatically in space. With human-teaching demonstration, the space robot is able to learn and abstract human tracking and capturing skill using an efficient neural-network learning architecture that combines flexible Cascade Neural Networks with Node Decoupled Extended Kalman Filtering (CNN-NDEKF). The simulation results attest that this approach is useful and feasible in tracking trajectory planning and capturing of space robot. Finally I propose a novel approach based on Genetic Algorithms (GAs) to optimize the approach trajectory of space robots in order to realize effective and stable operations. I complete the minimum-torque path planning in order to save the limited energy in space, and design the minimum jerk trajectory for the stabilization of the space manipulator and its space base. These optimal algorithms are very important and useful for the application of space robot.

  20. The effect of early berthing prospects on the energy efficiency operational index in oil tanker vessels

    NASA Astrophysics Data System (ADS)

    Acomi, N.; Acomi, O. C.

    2016-08-01

    Marine pollution is one of the main concerns of our society. In order to reduce air pollution produced by ships, the International Maritime Organization has developed technical, operational and management measures. Part of the operational measures refers to CO2 emissions that contribute to the energy efficiency of the vessel. The difficulty in assessing the energy efficiency of the vessel rests with the diversity of voyage parameters, including quantity of cargo, distance and type of fuel in use. Assessing the energy efficiency of the vessel is thus not a matter of determining the absolute value of the CO2, but of providing a meaningful construct to enable tracking performance trends over time, for the same ship, a fleet of ships or across the industry. This concept is the Energy Efficiency Operational Index, EEOI. The purpose of this study is to analyse the influence of a well predicted voyage on the EEOI value. The method used consists in a comparative analysis of two situations regarding berthing prospects: the real passage plan and an early prediction that supposes the vessel to arrive on time as required. The results of the study represent a monitoring tool for the ship owners to assess the EEOI from the early stage of designing the berthing prospects.

  1. Fund allocation using capacitated vehicle routing problem

    NASA Astrophysics Data System (ADS)

    Mamat, Nur Jumaadzan Zaleha; Jaaman, Saiful Hafizah; Ahmad, Rokiah Rozita; Darus, Maslina

    2014-09-01

    In investment fund allocation, it is unwise for an investor to distribute his fund into several assets simultaneously due to economic reasons. One solution is to allocate the fund into a particular asset at a time in a sequence that will either maximize returns or minimize risks depending on the investor's objective. The vehicle routing problem (VRP) provides an avenue to this issue. VRP answers the question on how to efficiently use the available fleet of vehicles to meet a given service demand, subjected to a set of operational requirements. This paper proposes an idea of using capacitated vehicle routing problem (CVRP) to optimize investment fund allocation by employing data of selected stocks in the FTSE Bursa Malaysia. Results suggest that CRVP can be applied to solve the issue of investment fund allocation and increase the investor's profit.

  2. DOE Office of Scientific and Technical Information (OSTI.GOV)

    Hao, He; Sun, Yannan; Carroll, Thomas E.

    We propose a coordination algorithm for cooperative power allocation among a collection of commercial buildings within a campus. We introduced thermal and power models of a typical commercial building Heating, Ventilation, and Air Conditioning (HVAC) system, and utilize model predictive control to characterize their power flexibility. The power allocation problem is formulated as a cooperative game using the Nash Bargaining Solution (NBS) concept, in which buildings collectively maximize the product of their utilities subject to their local flexibility constraints and a total power limit set by the campus coordinator. To solve the optimal allocation problem, a distributed protocol is designedmore » using dual decomposition of the Nash bargaining problem. Numerical simulations are performed to demonstrate the efficacy of our proposed allocation method« less

  3. Multi-Robot Coalitions Formation with Deadlines: Complexity Analysis and Solutions

    PubMed Central

    2017-01-01

    Multi-robot task allocation is one of the main problems to address in order to design a multi-robot system, very especially when robots form coalitions that must carry out tasks before a deadline. A lot of factors affect the performance of these systems and among them, this paper is focused on the physical interference effect, produced when two or more robots want to access the same point simultaneously. To our best knowledge, this paper presents the first formal description of multi-robot task allocation that includes a model of interference. Thanks to this description, the complexity of the allocation problem is analyzed. Moreover, the main contribution of this paper is to provide the conditions under which the optimal solution of the aforementioned allocation problem can be obtained solving an integer linear problem. The optimal results are compared to previous allocation algorithms already proposed by the first two authors of this paper and with a new method proposed in this paper. The results obtained show how the new task allocation algorithms reach up more than an 80% of the median of the optimal solution, outperforming previous auction algorithms with a huge reduction of the execution time. PMID:28118384

  4. Multi-Robot Coalitions Formation with Deadlines: Complexity Analysis and Solutions.

    PubMed

    Guerrero, Jose; Oliver, Gabriel; Valero, Oscar

    2017-01-01

    Multi-robot task allocation is one of the main problems to address in order to design a multi-robot system, very especially when robots form coalitions that must carry out tasks before a deadline. A lot of factors affect the performance of these systems and among them, this paper is focused on the physical interference effect, produced when two or more robots want to access the same point simultaneously. To our best knowledge, this paper presents the first formal description of multi-robot task allocation that includes a model of interference. Thanks to this description, the complexity of the allocation problem is analyzed. Moreover, the main contribution of this paper is to provide the conditions under which the optimal solution of the aforementioned allocation problem can be obtained solving an integer linear problem. The optimal results are compared to previous allocation algorithms already proposed by the first two authors of this paper and with a new method proposed in this paper. The results obtained show how the new task allocation algorithms reach up more than an 80% of the median of the optimal solution, outperforming previous auction algorithms with a huge reduction of the execution time.

  5. Estimation of exhaust emission from ocean-going vessels in Hong Kong.

    PubMed

    Yau, P S; Lee, S C; Corbett, James J; Wang, Chengfeng; Cheng, Y; Ho, K F

    2012-08-01

    As one of the busiest port in the world, ship emissions have become of great concern in Hong Kong. In this study, a detailed maritime emission inventory for ocean-going vessels (OGVs) in Hong Kong with the base year of 2007 was developed. The high-resolution vessel speed profiles determined using the Automatic Identification System (AIS) during 2009 were adopted for the speed data in the estimation. It was obtained that the total ship emissions from 37,150 voyages of OGVs in 2007 were 17,097, 8190, and 1035 tonnes accounting for 17%, 11%, and 16% of the total emissions of NO(x), SO(2), and PM(10), respectively. The contribution of ship emissions during transiting was 60-68% for three pollutants while the emissions during hotelling were responsible for the remaining portions. From the emission spatial allocation, the shipping route along the East Lamma Channel and the berthing location of the Kwai Chung and Tsing Yi Container Port comprised the regions with the highest emissions. The OGV emissions in Hong Kong contributed 0.07% NO(x), 0.05% SO(2), and 0.06% PM(10) out of the global total shipping emissions in 2007. Copyright © 2012 Elsevier B.V. All rights reserved.

  6. A Novel Sensor Selection and Power Allocation Algorithm for Multiple-Target Tracking in an LPI Radar Network

    PubMed Central

    She, Ji; Wang, Fei; Zhou, Jianjiang

    2016-01-01

    Radar networks are proven to have numerous advantages over traditional monostatic and bistatic radar. With recent developments, radar networks have become an attractive platform due to their low probability of intercept (LPI) performance for target tracking. In this paper, a joint sensor selection and power allocation algorithm for multiple-target tracking in a radar network based on LPI is proposed. It is found that this algorithm can minimize the total transmitted power of a radar network on the basis of a predetermined mutual information (MI) threshold between the target impulse response and the reflected signal. The MI is required by the radar network system to estimate target parameters, and it can be calculated predictively with the estimation of target state. The optimization problem of sensor selection and power allocation, which contains two variables, is non-convex and it can be solved by separating power allocation problem from sensor selection problem. To be specific, the optimization problem of power allocation can be solved by using the bisection method for each sensor selection scheme. Also, the optimization problem of sensor selection can be solved by a lower complexity algorithm based on the allocated powers. According to the simulation results, it can be found that the proposed algorithm can effectively reduce the total transmitted power of a radar network, which can be conducive to improving LPI performance. PMID:28009819

  7. Satellite Services Workshop, Volume 1

    NASA Technical Reports Server (NTRS)

    1982-01-01

    Key issues associated with the orbital servicing of satellites are examined including servicing spacecraft and equipment, servicing operations, economics, satellite design, docking and berthing, and fluid management.

  8. Dragon Spacecraft, SSRMS and Dextre

    NASA Image and Video Library

    2012-05-27

    ISS031-E-077666 (25 May 2012) --- The SpaceX Dragon commercial cargo craft is berthed to the Earth-facing side of the International Space Station’s Harmony node. Expedition 31 Flight Engineers Don Pettit and Andre Kuipers grappled Dragon at 9:56 a.m. (EDT) with the Canadarm2 robotic arm and used it to berth Dragon to the at 12:02 p.m. May 25, 2012. Dragon became the first commercially developed space vehicle to be launched to the station to join Russian, European and Japanese resupply craft that service the complex while restoring a U.S. capability to deliver cargo to the orbital laboratory. Dragon is scheduled to spend about a week docked with the station before returning to Earth on May 31 for retrieval.

  9. Dragon Spacecraft, SSRMS and Dextre

    NASA Image and Video Library

    2012-05-27

    ISS031-E-077562 (25 May 2012) --- The SpaceX Dragon commercial cargo craft is berthed to the Earth-facing side of the International Space Station’s Harmony node. Expedition 31 Flight Engineers Don Pettit and Andre Kuipers grappled Dragon at 9:56 a.m. (EDT) with the Canadarm2 robotic arm and used it to berth Dragon to the at 12:02 p.m. May 25, 2012. Dragon became the first commercially developed space vehicle to be launched to the station to join Russian, European and Japanese resupply craft that service the complex while restoring a U.S. capability to deliver cargo to the orbital laboratory. Dragon is scheduled to spend about a week docked with the station before returning to Earth on May 31 for retrieval.

  10. The Spartan 207 free-flyer is held in a low-hover mode above its berth in the Space Shuttle

    NASA Technical Reports Server (NTRS)

    1996-01-01

    STS-77 ESC VIEW --- The Spartan 207 free-flyer is held in a low-hover mode above its berth in the Space Shuttle Endeavour's cargo bay in the grasp of the Remote Manipulator System (RMS). The Spacehab module can be seen in the foreground. The free-flyer was re-captured by the six crew members on May 21, 1996. The crew has spent a portion of the early stages of the mission in various activities involving the Spartan 207 and the related Inflatable Antenna Experiment (IAE). The Spartan project is managed by NASA's Goddard Space Flight Center (GSFC) for NASA's Office of Space Science, Washington, D.C. GMT: 09:51:50.

  11. Space station full-scale docking/berthing mechanisms development

    NASA Technical Reports Server (NTRS)

    Burns, Gene C.; Price, Harold A.; Buchanan, David B.

    1988-01-01

    One of the most critical operational functions for the space station is the orbital docking between the station and the STS orbiter. The program to design, fabricate, and test docking/berthing mechanisms for the space station is described. The design reflects space station overall requirements and consists of two mating docking mechanism halves. One half is designed for use on the shuttle orbiter and incorporates capture and energy attenuation systems using computer controlled electromechanical actuators and/or attenuators. The mating half incorporates a flexible feature to allow two degrees of freedom at the module-to-module interface of the space station pressurized habitat volumes. The design concepts developed for the prototype units may be used for the first space station flight hardware.

  12. Proposing integrated Shannon's entropy-inverse data envelopment analysis methods for resource allocation problem under a fuzzy environment

    NASA Astrophysics Data System (ADS)

    Çakır, Süleyman

    2017-10-01

    In this study, a two-phase methodology for resource allocation problems under a fuzzy environment is proposed. In the first phase, the imprecise Shannon's entropy method and the acceptability index are suggested, for the first time in the literature, to select input and output variables to be used in the data envelopment analysis (DEA) application. In the second step, an interval inverse DEA model is executed for resource allocation in a short run. In an effort to exemplify the practicality of the proposed fuzzy model, a real case application has been conducted involving 16 cement firms listed in Borsa Istanbul. The results of the case application indicated that the proposed hybrid model is a viable procedure to handle input-output selection and resource allocation problems under fuzzy conditions. The presented methodology can also lend itself to different applications such as multi-criteria decision-making problems.

  13. 77 FR 32183 - Transmission Planning and Cost Allocation by Transmission Owning and Operating Public Utilities

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-05-31

    ... it would not wait for systemic problems to undermine transmission planning before action is taken... that the development of transmission facilities can involve long lead times and complex problems... rather than allowing the problems in transmission planning and cost allocation to continue or to increase...

  14. Acrodermatitis

    MedlinePlus

    ... Textbook of Pediatrics . 20th ed. Philadelphia, PA: Elsevier; 2016:chap 657. Gelmetti C. Gianotti-Crosti syndrome. In: Lebwohl MG, Heymann WR, Berth-Jones J, Coulson I, eds. Treatment of Skin Disease: ...

  15. Covariance versus correlation in capacitated vehicle routing problem-investment fund allocation problem

    NASA Astrophysics Data System (ADS)

    Mamat, Nur Jumaadzan Zaleha; Jaaman, Saiful Hafizah; Ahmad, Rokiah@Rozita

    2017-04-01

    Capacitated Vehicle Routing Problem-Investment Fund Allocation Problem (CVRP-IFAP) provides investors with a sequence of assets to allocate their funds into. To minimize total risks of investment in CVRP-IFAP covariance values measure the risks between two assets. Another measure of risks are correlation values between returns. The correlation values can be used to diversify the risk of investment loss in order to optimize expected return against a certain level of risk. This study compares the total risk obtained from CVRP-IFAP when using covariance values and correlation values. Results show that CVRP-IFAP with covariance values provides lesser total risks and a significantly better measure of risk.

  16. Antenna Allocation in MIMO Radar with Widely Separated Antennas for Multi-Target Detection

    PubMed Central

    Gao, Hao; Wang, Jian; Jiang, Chunxiao; Zhang, Xudong

    2014-01-01

    In this paper, we explore a new resource called multi-target diversity to optimize the performance of multiple input multiple output (MIMO) radar with widely separated antennas for detecting multiple targets. In particular, we allocate antennas of the MIMO radar to probe different targets simultaneously in a flexible manner based on the performance metric of relative entropy. Two antenna allocation schemes are proposed. In the first scheme, each antenna is allocated to illuminate a proper target over the entire illumination time, so that the detection performance of each target is guaranteed. The problem is formulated as a minimum makespan scheduling problem in the combinatorial optimization framework. Antenna allocation is implemented through a branch-and-bound algorithm and an enhanced factor 2 algorithm. In the second scheme, called antenna-time allocation, each antenna is allocated to illuminate different targets with different illumination time. Both antenna allocation and time allocation are optimized based on illumination probabilities. Over a large range of transmitted power, target fluctuations and target numbers, both of the proposed antenna allocation schemes outperform the scheme without antenna allocation. Moreover, the antenna-time allocation scheme achieves a more robust detection performance than branch-and-bound algorithm and the enhanced factor 2 algorithm when the target number changes. PMID:25350505

  17. Antenna allocation in MIMO radar with widely separated antennas for multi-target detection.

    PubMed

    Gao, Hao; Wang, Jian; Jiang, Chunxiao; Zhang, Xudong

    2014-10-27

    In this paper, we explore a new resource called multi-target diversity to optimize the performance of multiple input multiple output (MIMO) radar with widely separated antennas for detecting multiple targets. In particular, we allocate antennas of the MIMO radar to probe different targets simultaneously in a flexible manner based on the performance metric of relative entropy. Two antenna allocation schemes are proposed. In the first scheme, each antenna is allocated to illuminate a proper target over the entire illumination time, so that the detection performance of each target is guaranteed. The problem is formulated as a minimum makespan scheduling problem in the combinatorial optimization framework. Antenna allocation is implemented through a branch-and-bound algorithm and an enhanced factor 2 algorithm. In the second scheme, called antenna-time allocation, each antenna is allocated to illuminate different targets with different illumination time. Both antenna allocation and time allocation are optimized based on illumination probabilities. Over a large range of transmitted power, target fluctuations and target numbers, both of the proposed antenna allocation schemes outperform the scheme without antenna allocation. Moreover, the antenna-time allocation scheme achieves a more robust detection performance than branch-and-bound algorithm and the enhanced factor 2 algorithm when the target number changes.

  18. Economic aspects of spectrum management

    NASA Technical Reports Server (NTRS)

    Stibolt, R. D.

    1979-01-01

    Problems associated with the allocation of the radio frequency spectrum are addressed. It is observed that the current method very likely does not allocate the resource to those most valuing its use. Ecomonic criteria by which the effectiveness of resource allocation schemes can be judged are set forth and some thoughts on traditional objections to implementation of market characteristics into frequency allocation are offered. The problem of dividing orbit and spectrum between two satellite services sharing the same band but having significantly different system characteristics is discussed. The problem is compounded by the likelihood that one service will commence operation much sooner than the other. Some alternative schemes are offered that, within proper international constraints, could achieve a desired flexibility in the division of orbit and frequency between the two services domestically over the next several years.

  19. Aldolase blood test

    MedlinePlus

    ... Cecil Medicine . 25th ed. Philadelphia, PA: Elsevier Saunders; 2016:chap 269. Vleugels RA, Callen JP. Dermatomyositis. In: Lebwohl MG, Heymann WR, Berth-Jones J, Coulson I, eds. Treatment of Skin Disease: ...

  20. Bullous pemphigoid

    MedlinePlus

    ... Diagnosis and Therapy. 6th ed. Philadelphia, PA: Elsevier; 2016:chap 16. Scott M, Werth VP. Bullous pemphigoid. In: Lebwohl MG, Heymann WR, Berth-Jones J, Coulson I, eds. Treatment of Skin Disease: ...

  1. Learning automata-based solutions to the nonlinear fractional knapsack problem with applications to optimal resource allocation.

    PubMed

    Granmo, Ole-Christoffer; Oommen, B John; Myrer, Svein Arild; Olsen, Morten Goodwin

    2007-02-01

    This paper considers the nonlinear fractional knapsack problem and demonstrates how its solution can be effectively applied to two resource allocation problems dealing with the World Wide Web. The novel solution involves a "team" of deterministic learning automata (LA). The first real-life problem relates to resource allocation in web monitoring so as to "optimize" information discovery when the polling capacity is constrained. The disadvantages of the currently reported solutions are explained in this paper. The second problem concerns allocating limited sampling resources in a "real-time" manner with the purpose of estimating multiple binomial proportions. This is the scenario encountered when the user has to evaluate multiple web sites by accessing a limited number of web pages, and the proportions of interest are the fraction of each web site that is successfully validated by an HTML validator. Using the general LA paradigm to tackle both of the real-life problems, the proposed scheme improves a current solution in an online manner through a series of informed guesses that move toward the optimal solution. At the heart of the scheme, a team of deterministic LA performs a controlled random walk on a discretized solution space. Comprehensive experimental results demonstrate that the discretization resolution determines the precision of the scheme, and that for a given precision, the current solution (to both problems) is consistently improved until a nearly optimal solution is found--even for switching environments. Thus, the scheme, while being novel to the entire field of LA, also efficiently handles a class of resource allocation problems previously not addressed in the literature.

  2. Idiopathic livedo reticularis

    MedlinePlus

    ... Cecil Medicine. 25th ed. Philadelphia, PA: Elsevier Saunders; 2016:chap 80. Katugampola RP, Finlay AY. Livedo reticularis. In: Lebwohl MG, Heymann WR, Berth-Jones J, Coulson I, eds. Treatment of Skin Disease: ...

  3. Dragon Spacecraft Approaches ISS for Grapple

    NASA Image and Video Library

    2012-05-25

    ISS031-E-071143 (25 May 2012) --- The SpaceX Dragon commercial cargo craft approaches the International Space Station on May 25, 2012 for grapple and berthing. Expedition 31 Flight Engineers Don Pettit and Andre Kuipers grappled Dragon at 9:56 a.m. (EDT) with the Canadarm2 robotic arm and used the robotic arm to berth Dragon to the Earth-facing side of the station’s Harmony node at 12:02 p.m. May 25, 2012. Dragon became the first commercially developed space vehicle to be launched to the station to join Russian, European and Japanese resupply craft that service the complex while restoring a U.S. capability to deliver cargo to the orbital laboratory. Dragon is scheduled to spend about a week docked with the station before returning to Earth on May 31 for retrieval.

  4. Dragon Spacecraft Approaches ISS

    NASA Image and Video Library

    2012-05-25

    ISS031-E-070730 (25 May 2012) --- The SpaceX Dragon commercial cargo craft approaches the International Space Station on May 25, 2012 for grapple and berthing. Expedition 31 Flight Engineers Don Pettit and Andre Kuipers grappled Dragon at 9:56 a.m. (EDT) with the Canadarm2 robotic arm and used the robotic arm to berth Dragon to the Earth-facing side of the station’s Harmony node at 12:02 p.m. May 25, 2012. Dragon became the first commercially developed space vehicle to be launched to the station to join Russian, European and Japanese resupply craft that service the complex while restoring a U.S. capability to deliver cargo to the orbital laboratory. Dragon is scheduled to spend about a week docked with the station before returning to Earth on May 31 for retrieval.

  5. Dragon Spacecraft Approaches ISS

    NASA Image and Video Library

    2012-05-25

    ISS031-E-071121 (25 May 2012) --- The SpaceX Dragon commercial cargo craft approaches the International Space Station on May 25, 2012 for grapple and berthing. Expedition 31 Flight Engineers Don Pettit and Andre Kuipers grappled Dragon at 9:56 a.m. (EDT) with the Canadarm2 robotic arm and used the robotic arm to berth Dragon to the Earth-facing side of the station’s Harmony node at 12:02 p.m. May 25, 2012. Dragon became the first commercially developed space vehicle to be launched to the station to join Russian, European and Japanese resupply craft that service the complex while restoring a U.S. capability to deliver cargo to the orbital laboratory. Dragon is scheduled to spend about a week docked with the station before returning to Earth on May 31 for retrieval.

  6. Dragon Spacecraft Approaches ISS

    NASA Image and Video Library

    2012-05-25

    ISS031-E-071135 (25 May 2012) --- The SpaceX Dragon commercial cargo craft approaches the International Space Station on May 25, 2012 for grapple and berthing. Expedition 31 Flight Engineers Don Pettit and Andre Kuipers grappled Dragon at 9:56 a.m. (EDT) with the Canadarm2 robotic arm and used the robotic arm to berth Dragon to the Earth-facing side of the station’s Harmony node at 12:02 p.m. May 25, 2012. Dragon became the first commercially developed space vehicle to be launched to the station to join Russian, European and Japanese resupply craft that service the complex while restoring a U.S. capability to deliver cargo to the orbital laboratory. Dragon is scheduled to spend about a week docked with the station before returning to Earth on May 31 for retrieval.

  7. Dragon Spacecraft Approaches ISS

    NASA Image and Video Library

    2012-05-25

    ISS031-E-071134 (25 May 2012) --- The SpaceX Dragon commercial cargo craft approaches the International Space Station on May 25, 2012 for grapple and berthing. Expedition 31 Flight Engineers Don Pettit and Andre Kuipers grappled Dragon at 9:56 a.m. (EDT) with the Canadarm2 robotic arm and used the robotic arm to berth Dragon to the Earth-facing side of the station’s Harmony node at 12:02 p.m. May 25, 2012. Dragon became the first commercially developed space vehicle to be launched to the station to join Russian, European and Japanese resupply craft that service the complex while restoring a U.S. capability to deliver cargo to the orbital laboratory. Dragon is scheduled to spend about a week docked with the station before returning to Earth on May 31 for retrieval.

  8. Dragon Spacecraft Approaches ISS

    NASA Image and Video Library

    2012-05-25

    ISS031-E-070663 (25 May 2012) --- The SpaceX Dragon commercial cargo craft approaches the International Space Station on May 25, 2012 for grapple and berthing. Expedition 31 Flight Engineers Don Pettit and Andre Kuipers grappled Dragon at 9:56 a.m. (EDT) with the Canadarm2 robotic arm and used the robotic arm to berth Dragon to the Earth-facing side of the station’s Harmony node at 12:02 p.m. May 25, 2012. Dragon became the first commercially developed space vehicle to be launched to the station to join Russian, European and Japanese resupply craft that service the complex while restoring a U.S. capability to deliver cargo to the orbital laboratory. Dragon is scheduled to spend about a week docked with the station before returning to Earth on May 31 for retrieval.

  9. Dragon Spacecraft Approaches ISS

    NASA Image and Video Library

    2012-05-25

    ISS031-E-071075 (25 May 2012) --- The SpaceX Dragon commercial cargo craft approaches the International Space Station on May 25, 2012 for grapple and berthing. Expedition 31 Flight Engineers Don Pettit and Andre Kuipers grappled Dragon at 9:56 a.m. (EDT) with the Canadarm2 robotic arm and used the robotic arm to berth Dragon to the Earth-facing side of the station’s Harmony node at 12:02 p.m. May 25, 2012. Dragon became the first commercially developed space vehicle to be launched to the station to join Russian, European and Japanese resupply craft that service the complex while restoring a U.S. capability to deliver cargo to the orbital laboratory. Dragon is scheduled to spend about a week docked with the station before returning to Earth on May 31 for retrieval.

  10. Evolution of the IBDM Structural Latch Development into a Generic Simplified Design

    NASA Technical Reports Server (NTRS)

    DeVriendt, K.; Dittmer, H.; Vrancken, D.; Urmston, P.; Gracia, O.

    2010-01-01

    This paper presents the evolution in the development of the structural latch for the International Berthing Docking Mechanism (IBDM, see Figure 1). It reports on the lessons learned since completion of the test program on the engineering development unit of the first generation latching system in 2007. The initial latch design has been through a second generation concept in 2008, and now evolved into a third generation of this mechanism. Functional and structural testing on the latest latch hardware has recently been completed with good results. The IBDM latching system will provide the structural connection between two mated space vehicles after berthing or docking. The mechanism guarantees that the interface seals become compressed to form a leak-tight pressure system that creates a passageway for the astronauts.

  11. Mobile Ocean Test Berth Support: Cooperative Research and Development Final Report, CRADA Number CRD-10-413

    DOE Office of Scientific and Technical Information (OSTI.GOV)

    LiVecchi, Albert

    The Northwest National Marine Renewable Energy Center (NNMREC), headquartered at the Oregon State University, is establishing the capabilities to test prototype wave energy conversion devices in the ocean. This CRADA will leverage the technical expertise and resources at NREL in the wind industry and in ocean engineering to support and enhance the development of the NNMREC Mobile Ocean Test Berth (MOTB). This CRADA will provide direct support to NNMREC by providing design evaluation and review of the MOTB, developing effective protocols for testing of the MOTB and wave energy conversion devices in the ocean, assisting in the specification of appropriatemore » instrumentation and data acquisition packages, and providing guidance on obtaining and maintaining A2LA (American Association for Laboratory Accreditation) accreditation.« less

  12. A survey and taxonomy on energy efficient resource allocation techniques for cloud computing systems

    DOE Office of Scientific and Technical Information (OSTI.GOV)

    Hameed, Abdul; Khoshkbarforoushha, Alireza; Ranjan, Rajiv

    In a cloud computing paradigm, energy efficient allocation of different virtualized ICT resources (servers, storage disks, and networks, and the like) is a complex problem due to the presence of heterogeneous application (e.g., content delivery networks, MapReduce, web applications, and the like) workloads having contentious allocation requirements in terms of ICT resource capacities (e.g., network bandwidth, processing speed, response time, etc.). Several recent papers have tried to address the issue of improving energy efficiency in allocating cloud resources to applications with varying degree of success. However, to the best of our knowledge there is no published literature on this subjectmore » that clearly articulates the research problem and provides research taxonomy for succinct classification of existing techniques. Hence, the main aim of this paper is to identify open challenges associated with energy efficient resource allocation. In this regard, the study, first, outlines the problem and existing hardware and software-based techniques available for this purpose. Furthermore, available techniques already presented in the literature are summarized based on the energy-efficient research dimension taxonomy. The advantages and disadvantages of the existing techniques are comprehensively analyzed against the proposed research dimension taxonomy namely: resource adaption policy, objective function, allocation method, allocation operation, and interoperability.« less

  13. 46 CFR 169.311 - Fire protection.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... by a recognized testing laboratory, must be installed in each berthing compartment, sail locker, and...) Lamp, paint, oil lockers and similar compartments must be constructed of metal or wholly lined with...

  14. 46 CFR 169.311 - Fire protection.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... by a recognized testing laboratory, must be installed in each berthing compartment, sail locker, and...) Lamp, paint, oil lockers and similar compartments must be constructed of metal or wholly lined with...

  15. 46 CFR 169.311 - Fire protection.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... by a recognized testing laboratory, must be installed in each berthing compartment, sail locker, and...) Lamp, paint, oil lockers and similar compartments must be constructed of metal or wholly lined with...

  16. 46 CFR 169.311 - Fire protection.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... by a recognized testing laboratory, must be installed in each berthing compartment, sail locker, and...) Lamp, paint, oil lockers and similar compartments must be constructed of metal or wholly lined with...

  17. 46 CFR 169.311 - Fire protection.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... by a recognized testing laboratory, must be installed in each berthing compartment, sail locker, and...) Lamp, paint, oil lockers and similar compartments must be constructed of metal or wholly lined with...

  18. Pityriasis rubra pilaris

    MedlinePlus

    ... Skin: Clinical Dermatology . 12th ed. Philadelphia, PA: Elsevier; 2016:chap 11. Tobin AM, Kirby B. Pityriasis rubra pilaris. In: Lebwohl MG, Heymann WR, Berth-Jones J, Coulson I, eds. Treatment of Skin Disease: ...

  19. Shuttle interaction study extension

    NASA Technical Reports Server (NTRS)

    1982-01-01

    The following areas of Space Shuttle technology were discussed: variable altitude strategy, spacecraft servicing, propellant storage, orbiter plume impingement, space based design, mating (docking and berthing), shuttle fleet utilization, and mission/traffic model.

  20. Resource allocation in shared spectrum access communications for operators with diverse service requirements

    NASA Astrophysics Data System (ADS)

    Kibria, Mirza Golam; Villardi, Gabriel Porto; Ishizu, Kentaro; Kojima, Fumihide; Yano, Hiroyuki

    2016-12-01

    In this paper, we study inter-operator spectrum sharing and intra-operator resource allocation in shared spectrum access communication systems and propose efficient dynamic solutions to address both inter-operator and intra-operator resource allocation optimization problems. For inter-operator spectrum sharing, we present two competent approaches, namely the subcarrier gain-based sharing and fragmentation-based sharing, which carry out fair and flexible allocation of the available shareable spectrum among the operators subject to certain well-defined sharing rules, traffic demands, and channel propagation characteristics. The subcarrier gain-based spectrum sharing scheme has been found to be more efficient in terms of achieved throughput. However, the fragmentation-based sharing is more attractive in terms of computational complexity. For intra-operator resource allocation, we consider resource allocation problem with users' dissimilar service requirements, where the operator supports users with delay constraint and non-delay constraint service requirements, simultaneously. This optimization problem is a mixed-integer non-linear programming problem and non-convex, which is computationally very expensive, and the complexity grows exponentially with the number of integer variables. We propose less-complex and efficient suboptimal solution based on formulating exact linearization, linear approximation, and convexification techniques for the non-linear and/or non-convex objective functions and constraints. Extensive simulation performance analysis has been carried out that validates the efficiency of the proposed solution.

  1. A Framework for Optimal Control Allocation with Structural Load Constraints

    NASA Technical Reports Server (NTRS)

    Frost, Susan A.; Taylor, Brian R.; Jutte, Christine V.; Burken, John J.; Trinh, Khanh V.; Bodson, Marc

    2010-01-01

    Conventional aircraft generally employ mixing algorithms or lookup tables to determine control surface deflections needed to achieve moments commanded by the flight control system. Control allocation is the problem of converting desired moments into control effector commands. Next generation aircraft may have many multipurpose, redundant control surfaces, adding considerable complexity to the control allocation problem. These issues can be addressed with optimal control allocation. Most optimal control allocation algorithms have control surface position and rate constraints. However, these constraints are insufficient to ensure that the aircraft's structural load limits will not be exceeded by commanded surface deflections. In this paper, a framework is proposed to enable a flight control system with optimal control allocation to incorporate real-time structural load feedback and structural load constraints. A proof of concept simulation that demonstrates the framework in a simulation of a generic transport aircraft is presented.

  2. 46 CFR 80.10 - Applicability.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... of communication within the United States offering passage or soliciting passengers for an ocean voyage anywhere in the world, by a vessel of one hundred gross tons or over having berth or stateroom...

  3. 46 CFR 80.10 - Applicability.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... of communication within the United States offering passage or soliciting passengers for an ocean voyage anywhere in the world, by a vessel of one hundred gross tons or over having berth or stateroom...

  4. 46 CFR 80.10 - Applicability.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... of communication within the United States offering passage or soliciting passengers for an ocean voyage anywhere in the world, by a vessel of one hundred gross tons or over having berth or stateroom...

  5. 46 CFR 80.10 - Applicability.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... of communication within the United States offering passage or soliciting passengers for an ocean voyage anywhere in the world, by a vessel of one hundred gross tons or over having berth or stateroom...

  6. 46 CFR 80.10 - Applicability.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... of communication within the United States offering passage or soliciting passengers for an ocean voyage anywhere in the world, by a vessel of one hundred gross tons or over having berth or stateroom...

  7. A novel profit-allocation strategy for SDN enterprises

    NASA Astrophysics Data System (ADS)

    Hu, Wei; Hou, Ye; Tian, Longwei; Li, Yuan

    2017-01-01

    Aiming to solve the problem of profit allocation for supply and demand network (SDN) enterprises that ignores risk factors and generates low satisfaction, a novel profit-allocation model based on cooperative game theory and TOPSIS is proposed. This new model avoids the defect of the single-profit allocation model by introducing risk factors, compromise coefficients and high negotiation points. By measuring the Euclidean distance between the ideal solution vector and the negative ideal solution vector, every node's satisfaction problem for the SDN was resolved, and the mess phenomenon was avoided. Finally, the rationality and effectiveness of the proposed model was verified using a numerical example.

  8. Optimal allocation model of construction land based on two-level system optimization theory

    NASA Astrophysics Data System (ADS)

    Liu, Min; Liu, Yanfang; Xia, Yuping; Lei, Qihong

    2007-06-01

    The allocation of construction land is an important task in land-use planning. Whether implementation of planning decisions is a success or not, usually depends on a reasonable and scientific distribution method. Considering the constitution of land-use planning system and planning process in China, multiple levels and multiple objective decision problems is its essence. Also, planning quantity decomposition is a two-level system optimization problem and an optimal resource allocation decision problem between a decision-maker in the topper and a number of parallel decision-makers in the lower. According the characteristics of the decision-making process of two-level decision-making system, this paper develops an optimal allocation model of construction land based on two-level linear planning. In order to verify the rationality and the validity of our model, Baoan district of Shenzhen City has been taken as a test case. Under the assistance of the allocation model, construction land is allocated to ten townships of Baoan district. The result obtained from our model is compared to that of traditional method, and results show that our model is reasonable and usable. In the end, the paper points out the shortcomings of the model and further research directions.

  9. DOE Office of Scientific and Technical Information (OSTI.GOV)

    Hameed, Abdul; Khoshkbarforoushha, Alireza; Ranjan, Rajiv

    In a cloud computing paradigm, energy efficient allocation of different virtualized ICT resources (servers, storage disks, and networks, and the like) is a complex problem due to the presence of heterogeneous application (e.g., content delivery networks, MapReduce, web applications, and the like) workloads having contentious allocation requirements in terms of ICT resource capacities (e.g., network bandwidth, processing speed, response time, etc.). Several recent papers have tried to address the issue of improving energy efficiency in allocating cloud resources to applications with varying degree of success. However, to the best of our knowledge there is no published literature on this subjectmore » that clearly articulates the research problem and provides research taxonomy for succinct classification of existing techniques. Hence, the main aim of this paper is to identify open challenges associated with energy efficient resource allocation. In this regard, the study, first, outlines the problem and existing hardware and software-based techniques available for this purpose. Furthermore, available techniques already presented in the literature are summarized based on the energy-efficient research dimension taxonomy. The advantages and disadvantages of the existing techniques are comprehensively analyzed against the proposed research dimension taxonomy namely: resource adaption policy, objective function, allocation method, allocation operation, and interoperability.« less

  10. Some dynamic resource allocation problems in wireless networks

    NASA Astrophysics Data System (ADS)

    Berry, Randall

    2001-07-01

    We consider dynamic resource allocation problems that arise in wireless networking. Specifically transmission scheduling problems are studied in cases where a user can dynamically allocate communication resources such as transmission rate and power based on current channel knowledge as well as traffic variations. We assume that arriving data is stored in a transmission buffer, and investigate the trade-off between average transmission power and average buffer delay. A general characterization of this trade-off is given and the behavior of this trade-off in the regime of asymptotically large buffer delays is explored. An extension to a more general utility based quality of service definition is also discussed.

  11. Trading a Problem-solving Task

    NASA Astrophysics Data System (ADS)

    Matsubara, Shigeo

    This paper focuses on a task allocation problem, especially cases where the task is to find a solution in a search problem or a constraint satisfaction problem. If the search problem is hard to solve, a contractor may fail to find a solution. Here, the more computational resources such as the CPU time the contractor invests in solving the search problem, the more a solution is likely to be found. This brings about a new problem that a contractee has to find an appropriate level of the quality in a task achievement as well as to find an efficient allocation of a task among contractors. For example, if the contractee asks the contractor to find a solution with certainty, the payment from the contractee to the contractor may exceed the contractee's benefit from obtaining a solution, which discourages the contractee from trading a task. However, solving this problem is difficult because the contractee cannot ascertain the contractor's problem-solving ability such as the amount of available resources and knowledge (e.g. algorithms, heuristics) or monitor what amount of resources are actually invested in solving the allocated task. To solve this problem, we propose a task allocation mechanism that is able to choose an appropriate level of the quality in a task achievement and prove that this mechanism guarantees that each contractor reveals its true information. Moreover, we show that our mechanism can increase the contractee's utility compared with a simple auction mechanism by using computer simulation.

  12. Shingles - aftercare

    MedlinePlus

    Herpes zoster - treatment ... Mays RM, Petersen ET, Gordon RA, Tyring SK. Herpes zoster. In: Lebwohl MG, Heymann WR, Berth-Jones ... Saunders; 2014:chap 101. Whitley RJ. Chickenpox and herpes zoster (varicella-zoster virus). In: Bennett JE, Dolin ...

  13. Resource allocation for wildland fire suppression planning using a stochastic program

    Treesearch

    Alex Taylor Masarie

    2011-01-01

    Resource allocation for wildland fire suppression problems, referred to here as Fire-S problems, have been studied for over a century. Not only have the many variants of the base Fire-S problem made it such a durable one to study, but advances in suppression technology and our ever-expanding knowledge of and experience with wildland fire behavior have required almost...

  14. Comprehensive reliability allocation method for CNC lathes based on cubic transformed functions of failure mode and effects analysis

    NASA Astrophysics Data System (ADS)

    Yang, Zhou; Zhu, Yunpeng; Ren, Hongrui; Zhang, Yimin

    2015-03-01

    Reliability allocation of computerized numerical controlled(CNC) lathes is very important in industry. Traditional allocation methods only focus on high-failure rate components rather than moderate failure rate components, which is not applicable in some conditions. Aiming at solving the problem of CNC lathes reliability allocating, a comprehensive reliability allocation method based on cubic transformed functions of failure modes and effects analysis(FMEA) is presented. Firstly, conventional reliability allocation methods are introduced. Then the limitations of direct combination of comprehensive allocation method with the exponential transformed FMEA method are investigated. Subsequently, a cubic transformed function is established in order to overcome these limitations. Properties of the new transformed functions are discussed by considering the failure severity and the failure occurrence. Designers can choose appropriate transform amplitudes according to their requirements. Finally, a CNC lathe and a spindle system are used as an example to verify the new allocation method. Seven criteria are considered to compare the results of the new method with traditional methods. The allocation results indicate that the new method is more flexible than traditional methods. By employing the new cubic transformed function, the method covers a wider range of problems in CNC reliability allocation without losing the advantages of traditional methods.

  15. Scheduling language and algorithm development study. Volume 1, phase 2: Design considerations for a scheduling and resource allocation system

    NASA Technical Reports Server (NTRS)

    Morrell, R. A.; Odoherty, R. J.; Ramsey, H. R.; Reynolds, C. C.; Willoughby, J. K.; Working, R. D.

    1975-01-01

    Data and analyses related to a variety of algorithms for solving typical large-scale scheduling and resource allocation problems are presented. The capabilities and deficiencies of various alternative problem solving strategies are discussed from the viewpoint of computer system design.

  16. Erythroplasia of Queyrat

    MedlinePlus

    ... ed. Clinical Dermatology . 6th ed. Philadelphia, PA: Elsevier; 2016:chap 21. Regan TD, Lawrence N. Bowen's disease and erythroplasia of Queyrat. In: Lebwohl MG, Heymann WR, Berth-Jones J, Coulson IH, eds. Treatment of Skin Disease: ...

  17. PMA3 Relocate ops

    NASA Image and Video Library

    2009-08-07

    ISS020-E-028611 (7 Aug. 2009) --- European Space Agency astronaut Frank De Winne (foreground) and Canadian Space Agency astronaut Robert Thirsk, both Expedition 20 flight engineers, work the controls of the Space Station Remote Manipulator System (SSRMS) and the Centerline Berthing Camera System (CBCS) in the International Space Station’s Destiny laboratory to relocate the Pressurized Mating Adapter 3 (PMA-3) from the Unity node nadir port to Unity’s port side. This relocation is required to allow reconfigurations on the side of the Unity node port bulkhead by the crew in a pressurized environment where PMA-3 is now located. Once these reconfigurations are completed, PMA-3 will be relocated back to Unity’s nadir port, after which the Tranquility node will be brought up and berthed to Unity’s port side on mission STS-130/20A.

  18. Dragon Spacecraft, SSRMS and Dextre

    NASA Image and Video Library

    2012-05-27

    ISS031-E-077669 (25 May 2012) --- With rays of sunshine and the thin blue atmosphere of Earth serving as a backdrop, the SpaceX Dragon commercial cargo craft is berthed to the Earth-facing side of the International Space Station’s Harmony node. Expedition 31 Flight Engineers Don Pettit and Andre Kuipers grappled Dragon at 9:56 a.m. (EDT) with the Canadarm2 robotic arm and used it to berth Dragon to the at 12:02 p.m. May 25, 2012. Dragon became the first commercially developed space vehicle to be launched to the station to join Russian, European and Japanese resupply craft that service the complex while restoring a U.S. capability to deliver cargo to the orbital laboratory. Dragon is scheduled to spend about a week docked with the station before returning to Earth on May 31 for retrieval

  19. Dragon Spacecraft on Approach to the ISS

    NASA Image and Video Library

    2012-05-25

    ISS031-E-070745 (25 May 2012) --- The SpaceX Dragon commercial cargo craft approaches the International Space Station on May 25, 2012 for grapple and berthing. Expedition 31 Flight Engineers Don Pettit and Andre Kuipers grappled Dragon at 9:56 a.m. (EDT) with the Canadarm2 robotic arm and used the robotic arm to berth Dragon to the Earth-facing side of the station’s Harmony node at 12:02 p.m. May 25, 2012. Dragon became the first commercially developed space vehicle to be launched to the station to join Russian, European and Japanese resupply craft that service the complex while restoring a U.S. capability to deliver cargo to the orbital laboratory. Dragon is scheduled to spend about a week docked with the station before returning to Earth on May 31 for retrieval.

  20. Dragon Spacecraft on Approach to the ISS

    NASA Image and Video Library

    2012-05-25

    ISS031-E-071140 (25 May 2012) --- The SpaceX Dragon commercial cargo craft approaches the International Space Station on May 25, 2012 for grapple and berthing. Expedition 31 Flight Engineers Don Pettit and Andre Kuipers grappled Dragon at 9:56 a.m. (EDT) with the Canadarm2 robotic arm and used the robotic arm to berth Dragon to the Earth-facing side of the station’s Harmony node at 12:02 p.m. May 25, 2012. Dragon became the first commercially developed space vehicle to be launched to the station to join Russian, European and Japanese resupply craft that service the complex while restoring a U.S. capability to deliver cargo to the orbital laboratory. Dragon is scheduled to spend about a week docked with the station before returning to Earth on May 31 for retrieval.

  1. Dragon Spacecraft, SSRMS and Dextre

    NASA Image and Video Library

    2012-05-27

    ISS031-E-077670 (25 May 2012) --- With rays of sunshine and the thin blue atmosphere of Earth serving as a backdrop, the SpaceX Dragon commercial cargo craft is berthed to the Earth-facing side of the International Space Station’s Harmony node. Expedition 31 Flight Engineers Don Pettit and Andre Kuipers grappled Dragon at 9:56 a.m. (EDT) with the Canadarm2 robotic arm and used it to berth Dragon to the at 12:02 p.m. May 25, 2012. Dragon became the first commercially developed space vehicle to be launched to the station to join Russian, European and Japanese resupply craft that service the complex while restoring a U.S. capability to deliver cargo to the orbital laboratory. Dragon is scheduled to spend about a week docked with the station before returning to Earth on May 31 for retrieval

  2. Automatic Generation of Overlays and Offset Values Based on Visiting Vehicle Telemetry and RWS Visuals

    NASA Technical Reports Server (NTRS)

    Dunne, Matthew J.

    2011-01-01

    The development of computer software as a tool to generate visual displays has led to an overall expansion of automated computer generated images in the aerospace industry. These visual overlays are generated by combining raw data with pre-existing data on the object or objects being analyzed on the screen. The National Aeronautics and Space Administration (NASA) uses this computer software to generate on-screen overlays when a Visiting Vehicle (VV) is berthing with the International Space Station (ISS). In order for Mission Control Center personnel to be a contributing factor in the VV berthing process, computer software similar to that on the ISS must be readily available on the ground to be used for analysis. In addition, this software must perform engineering calculations and save data for further analysis.

  3. A heuristic approach to handle capacitated facility location problem evaluated using clustering internal evaluation

    NASA Astrophysics Data System (ADS)

    Sutanto, G. R.; Kim, S.; Kim, D.; Sutanto, H.

    2018-03-01

    One of the problems in dealing with capacitated facility location problem (CFLP) is occurred because of the difference between the capacity numbers of facilities and the number of customers that needs to be served. A facility with small capacity may result in uncovered customers. These customers need to be re-allocated to another facility that still has available capacity. Therefore, an approach is proposed to handle CFLP by using k-means clustering algorithm to handle customers’ allocation. And then, if customers’ re-allocation is needed, is decided by the overall average distance between customers and the facilities. This new approach is benchmarked to the existing approach by Liao and Guo which also use k-means clustering algorithm as a base idea to decide the facilities location and customers’ allocation. Both of these approaches are benchmarked by using three clustering evaluation methods with connectedness, compactness, and separations factors.

  4. Cross-layer Joint Relay Selection and Power Allocation Scheme for Cooperative Relaying System

    NASA Astrophysics Data System (ADS)

    Zhi, Hui; He, Mengmeng; Wang, Feiyue; Huang, Ziju

    2018-03-01

    A novel cross-layer joint relay selection and power allocation (CL-JRSPA) scheme over physical layer and data-link layer is proposed for cooperative relaying system in this paper. Our goal is finding the optimal relay selection and power allocation scheme to maximize system achievable rate when satisfying total transmit power constraint in physical layer and statistical delay quality-of-service (QoS) demand in data-link layer. Using the concept of effective capacity (EC), our goal can be formulated into an optimal joint relay selection and power allocation (JRSPA) problem to maximize the EC when satisfying total transmit power limitation. We first solving optimal power allocation (PA) problem with Lagrange multiplier approach, and then solving optimal relay selection (RS) problem. Simulation results demonstrate that CL-JRSPA scheme gets larger EC than other schemes when satisfying delay QoS demand. In addition, the proposed CL-JRSPA scheme achieves the maximal EC when relay located approximately halfway between source and destination, and EC becomes smaller when the QoS exponent becomes larger.

  5. Multi-Agent Coordination Techniques for Naval Tactical Combat Resources Management

    DTIC Science & Technology

    2008-07-01

    resource coordination and cooperation problems. The combat resource allocation planning problem is treated in the companion report [2]. 2.3 Resource...report focuses on the resource coordination problem, while allocation algorithms are discussed in the companion report [2]. First, coordination in...classification of each should be indicated as with the title.) Canada’s Leader in Defence and National Security Science and Technology Chef de file au Canada en

  6. Resource Allocation in Healthcare: Implications of Models of Medicine as a Profession

    PubMed Central

    Kluge, Eike-Henner W.

    2007-01-01

    For decades, the problem of how to allocate healthcare resources in a just and equitable fashion has been the subject of concerted discussion and analysis, yet the issue has stubbornly resisted resolution. This article suggests that a major reason for this is that the discussion has focused exclusively on the nature and status of the material resources, and that the nature and role of the medical profession have been entirely ignored. Because physicians are gatekeepers to healthcare resources, their role in allocation is central from a process perspective. This article identifies 3 distinct interpretations of the nature of medicine, shows how each mandates a different method of allocation, and argues that unless an appropriate model of medicine is developed that acknowledges the valid points contained in each of the 3 approaches, the allocation problem will remain unsolvable. PMID:17435657

  7. A mathematical modeling approach to resource allocation for railroad-highway crossing safety upgrades.

    PubMed

    Konur, Dinçer; Golias, Mihalis M; Darks, Brandon

    2013-03-01

    State Departments of Transportation (S-DOT's) periodically allocate budget for safety upgrades at railroad-highway crossings. Efficient resource allocation is crucial for reducing accidents at railroad-highway crossings and increasing railroad as well as highway transportation safety. While a specific method is not restricted to S-DOT's, sorting type of procedures are recommended by the Federal Railroad Administration (FRA), United States Department of Transportation for the resource allocation problem. In this study, a generic mathematical model is proposed for the resource allocation problem for railroad-highway crossing safety upgrades. The proposed approach is compared to sorting based methods for safety upgrades of public at-grade railroad-highway crossings in Tennessee. The comparison shows that the proposed mathematical modeling approach is more efficient than sorting methods in reducing accidents and severity. Copyright © 2012 Elsevier Ltd. All rights reserved.

  8. 6. VIEW SHOWING NORTHEAST END OF WHARF REAR FROM LANDSLIDE ...

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

    6. VIEW SHOWING NORTHEAST END OF WHARF REAR FROM LANDSLIDE - U.S. Naval Base, Pearl Harbor, Berthing Wharf S378, Beckoning Point, Southeast of Cowpens Street, Ford Island, Pearl City, Honolulu County, HI

  9. A GA based penalty function technique for solving constrained redundancy allocation problem of series system with interval valued reliability of components

    NASA Astrophysics Data System (ADS)

    Gupta, R. K.; Bhunia, A. K.; Roy, D.

    2009-10-01

    In this paper, we have considered the problem of constrained redundancy allocation of series system with interval valued reliability of components. For maximizing the overall system reliability under limited resource constraints, the problem is formulated as an unconstrained integer programming problem with interval coefficients by penalty function technique and solved by an advanced GA for integer variables with interval fitness function, tournament selection, uniform crossover, uniform mutation and elitism. As a special case, considering the lower and upper bounds of the interval valued reliabilities of the components to be the same, the corresponding problem has been solved. The model has been illustrated with some numerical examples and the results of the series redundancy allocation problem with fixed value of reliability of the components have been compared with the existing results available in the literature. Finally, sensitivity analyses have been shown graphically to study the stability of our developed GA with respect to the different GA parameters.

  10. Multi-robot task allocation based on two dimensional artificial fish swarm algorithm

    NASA Astrophysics Data System (ADS)

    Zheng, Taixiong; Li, Xueqin; Yang, Liangyi

    2007-12-01

    The problem of task allocation for multiple robots is to allocate more relative-tasks to less relative-robots so as to minimize the processing time of these tasks. In order to get optimal multi-robot task allocation scheme, a twodimensional artificial swarm algorithm based approach is proposed in this paper. In this approach, the normal artificial fish is extended to be two dimension artificial fish. In the two dimension artificial fish, each vector of primary artificial fish is extended to be an m-dimensional vector. Thus, each vector can express a group of tasks. By redefining the distance between artificial fish and the center of artificial fish, the behavior of two dimension fish is designed and the task allocation algorithm based on two dimension artificial swarm algorithm is put forward. At last, the proposed algorithm is applied to the problem of multi-robot task allocation and comparer with GA and SA based algorithm is done. Simulation and compare result shows the proposed algorithm is effective.

  11. Resource allocation using ANN in LTE

    NASA Astrophysics Data System (ADS)

    Yigit, Tuncay; Ersoy, Mevlut

    2017-07-01

    LTE is the 4th generation wireless network technology, which provides flexible bandwidth, higher data speeds and lower delay. Difficulties may be experienced upon an increase in the number of users in LTE. The objective of this study is to ensure a faster solution to any such resource allocation problems which might arise upon an increase in the number of users. A fast and effective solution has been obtained by making use of Artificial Neural Network. As a result, fast working artificial intelligence methods may be used in resource allocation problems during operation.

  12. Adaptive Control Allocation for Fault Tolerant Overactuated Autonomous Vehicles

    DTIC Science & Technology

    2007-11-01

    Tolerant Overactuated Autonomous Vehicles Casavola, A.; Garone, E. (2007) Adaptive Control Allocation for Fault Tolerant Overactuated Autonomous ...Adaptive Control Allocation for Fault Tolerant Overactuated Autonomous Vehicles 5a. CONTRACT NUMBER 5b. GRANT NUMBER 5c. PROGRAM ELEMENT NUMBER 6...Tolerant Overactuated Autonomous Vehicles 3.2 - 2 RTO-MP-AVT-145 UNCLASSIFIED/UNLIMITED Control allocation problem (CAP) - Given a virtual input v(t

  13. Hot tub folliculitis

    MedlinePlus

    ... RG. Folliculitis. In: Lebwohl MG, Heymann WR, Berth-Jones J, Coulson I, eds. Treatment of Skin Disease: Comprehensive Therapeutic Strategies . 4th ed. Philadelphia, PA: Elsevier; 2014:chap 83. Review Date 10/24/2016 Updated by: David L. Swanson, MD, Vice Chair ...

  14. Seborrheic keratosis

    MedlinePlus

    ... Seborrheic kertosis. In: Lebwohl MG, Heymann WR, Berth-Jones J, Coulson I, eds. Treatment of Skin Disease: Comprehensive Therapeutic Strategies . 4th ed. Philadelphia, PA: Elsevier Saunders; 2014:chap 220. Review Date 10/24/2016 Updated by: David L. Swanson, MD, Vice Chair ...

  15. Pityriasis rosea

    MedlinePlus

    ... Pityriasis rosea. In: Lebwohl MG, Heymann WR, Berth-Jones J, Coulson I, eds. Treatment of Skin Disease: Comprehensive Therapeutic Strategies . 4th ed. Philadelphia, PA: Elsevier; 2014:chap 186. Review Date 12/10/2016 Updated by: Linda J. Vorvick, MD, Clinical Associate ...

  16. Resiman during Expedition 16/STS-123 EVA 1

    NASA Image and Video Library

    2008-03-14

    ISS016-E-032705 (13/14 March 2008) --- Astronaut Garrett Reisman, Expedition 16 flight engineer, uses a digital camera to expose a photo of his helmet visor during the mission's first scheduled session of extravehicular activity (EVA) as construction and maintenance continue on the International Space Station. Also visible in the reflections in the visor are various components of the station, the docked Space Shuttle Endeavour and a blue and white portion of Earth. During the seven-hour and one-minute spacewalk, Reisman and astronaut Rick Linnehan (out of frame), STS-123 mission specialist, prepared the Japanese logistics module-pressurized section (JLP) for removal from Space Shuttle Endeavour's payload bay; opened the Centerline Berthing Camera System on top of the Harmony module; removed the Passive Common Berthing Mechanism and installed both the Orbital Replacement Unit (ORU) tool change out mechanisms on the Canadian-built Dextre robotic system, the final element of the station's Mobile Servicing System.

  17. Overview of LIDS Docking and Berthing System Seals

    NASA Technical Reports Server (NTRS)

    Daniels, Christopher C.; Dunlap, Patrick H., Jr.; deGroh, Henry C., III; Steinetz, Bruce M.; Oswald, Jay J.; Smith, Ian

    2007-01-01

    This viewgraph presentation describes the Low Impact Docking System (LIDS) docking and berthing system seals. The contents include: 1) Description of the Application: Low Impact Docking System (LIDS); 2) LIDS Seal Locations: Vehicle Undocked (Hatch Closed); 3) LIDS Seal Locations: Mechanical Pass Thru; 4) LIDS Seal Locations: Electrical and Pyro Connectors; 5) LIDS Seal Locations: Vehicle Docked (Hatches Open); 6) LIDS Seal Locations: Main Interface Seal; 7) Main Interface Seal Challenges and Specifications; 8) Approach; 9) Seal Concepts Under Development/Evaluation; 10) Elastomer Material Evaluations; 11) Evaluation of Relevant Seal Properties; 12) Medium-Scale (12") Gask-O-Seal Compression Tests; 13) Medium-Scale Compression Results; 14) Adhesion Forces of Elliptical Top Gask-o-seals; 15) Medium-Scale Seals; 16) Medium-Scale Leakage Results: Effect of Configuration; 17) Full Scale LIDS Seal Test Rig Development; 18) Materials International Space Station Experiment (MISSE 6A and 6B); and 19) Schedule.

  18. Econophysics of a ranked demand and supply resource allocation problem

    NASA Astrophysics Data System (ADS)

    Priel, Avner; Tamir, Boaz

    2018-01-01

    We present a two sided resource allocation problem, between demands and supplies, where both parties are ranked. For example, in Big Data problems where a set of different computational tasks is divided between a set of computers each with its own resources, or between employees and employers where both parties are ranked, the employees by their fitness and the employers by their package benefits. The allocation process can be viewed as a repeated game where in each iteration the strategy is decided by a meta-rule, based on the ranks of both parties and the results of the previous games. We show the existence of a phase transition between an absorbing state, where all demands are satisfied, and an active one where part of the demands are always left unsatisfied. The phase transition is governed by the ratio between supplies and demand. In a job allocation problem we find positive correlation between the rank of the workers and the rank of the factories; higher rank workers are usually allocated to higher ranked factories. These all suggest global emergent properties stemming from local variables. To demonstrate the global versus local relations, we introduce a local inertial force that increases the rank of employees in proportion to their persistence time in the same factory. We show that such a local force induces non trivial global effects, mostly to benefit the lower ranked employees.

  19. Distortion outage minimization in Nakagami fading using limited feedback

    NASA Astrophysics Data System (ADS)

    Wang, Chih-Hong; Dey, Subhrakanti

    2011-12-01

    We focus on a decentralized estimation problem via a clustered wireless sensor network measuring a random Gaussian source where the clusterheads amplify and forward their received signals (from the intra-cluster sensors) over orthogonal independent stationary Nakagami fading channels to a remote fusion center that reconstructs an estimate of the original source. The objective of this paper is to design clusterhead transmit power allocation policies to minimize the distortion outage probability at the fusion center, subject to an expected sum transmit power constraint. In the case when full channel state information (CSI) is available at the clusterhead transmitters, the optimization problem can be shown to be convex and is solved exactly. When only rate-limited channel feedback is available, we design a number of computationally efficient sub-optimal power allocation algorithms to solve the associated non-convex optimization problem. We also derive an approximation for the diversity order of the distortion outage probability in the limit when the average transmission power goes to infinity. Numerical results illustrate that the sub-optimal power allocation algorithms perform very well and can close the outage probability gap between the constant power allocation (no CSI) and full CSI-based optimal power allocation with only 3-4 bits of channel feedback.

  20. Analysis and Research on the Optimal Allocation of Regional Water Resources

    NASA Astrophysics Data System (ADS)

    rui-chao, Xi; yu-jie, Gu

    2018-06-01

    Starting from the basic concept of optimal allocation of water resources, taking the allocation of water resources in Tianjin as an example, the present situation of water resources in Tianjin is analyzed, and the multi-objective optimal allocation model of water resources is used to optimize the allocation of water resources. We use LINGO to solve the model, get the optimal allocation plan that meets the economic and social benefits, and put forward relevant policies and regulations, so as to provide theoretical which is basis for alleviating and solving the problem of water shortage.

  1. 22. FANTAIL DECK, SHOWING DETAIL OF DECK EXTENSION AND EXTERIOR ...

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

    22. FANTAIL DECK, SHOWING DETAIL OF DECK EXTENSION AND EXTERIOR LOCKING MECHANISM ON HATCH DOOR TO CREW'S BERTHING. - U.S. Coast Guard Cutter WHITE HEATH, USGS Integrated Support Command Boston, 427 Commercial Street, Boston, Suffolk County, MA

  2. 33 CFR 165.111 - Safety Zone: Boston Harbor, Boston, Massachusetts.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... Boston Harbor from the time such vessels depart their respective berths until the time they complete... the face of both piers to the landside points where both piers end. (3) Around the U.S.S. Constitution...

  3. 78 FR 23543 - Procurement List Deletions

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-04-19

    ... Logistics Agency Troop Support, Philadelphia, PA NSN: 1680-00-677-2060--Bottom Assembly, Crew Berth NPA: None assigned. Contracting Activity: Defense Logistics Agency Aviation, Richmond, VA Service Service... Area Rehabilitation Centers, Inc., Madison, WI Contracting Activity: GSA, Public Buildings Service...

  4. Antifouling biocides in German marinas: Exposure assessment and calculation of national consumption and emission.

    PubMed

    Daehne, Dagmar; Fürle, Constanze; Thomsen, Anja; Watermann, Burkard; Feibicke, Michael

    2017-09-01

    The authorization of biocidal antifouling products for leisure boats is the subject of the European Union Biocides Regulation 528/2012. National specifics may be regarded by the member states in their assessment of environmental risks. The aim of this survey was to collect corresponding data and to create a database for the environmental risk assessment of antifouling active substances in German surface waters. Water concentrations of current antifouling active substances and selected breakdown products were measured in a single-sampling campaign covering 50 marinas at inland and coastal areas. Increased levels were found for Zn, Cu, and cybutryne. For the latter, the maximum allowable concentration according to Directive 2013/39/EU was exceeded at 5 marinas. For Cu, local environmental quality standards were exceeded at 10 marinas. Base data on the total boat inventory in Germany were lacking until now. For that reason, a nationwide survey of mooring berths was conducted by use of aerial photos. About 206 000 mooring berths obviously used by boats with a potential antifouling application were counted. The blind spot of very small marinas was estimated at 20 000 berths. Seventy-one percent of berths were located at freshwater sites, illustrating the importance of navigable inland waterways for leisure boat activities and underlining the need for a customized exposure assessment in these areas. Moreover, the national consumption of all antifouling products for leisure boats was calculated. The total amount of 794 tonnes/annum (t/a) consisted of 179 t/a of inorganic Cu compounds, 19 t/a of organic cobiocides, and 49.5 t/a of Zn. With regard to weight proportion, 141 t/a Cu and 40 t/a Zn were consumed. Assuming an emission ratio of 50% during service life, 70.5 t/a of Cu amounted to 15% of all external sources for Cu release to German surface waters. These figures highlight the need for mitigation measures. Integr Environ Assess Manag 2017;13:892-905. © 2017 The Authors. Integrated Environmental Assessment and Management published by Wiley Periodicals, Inc. on behalf of Society of Environmental Toxicology & Chemistry (SETAC). © 2017 The Authors. Integrated Environmental Assessment and Management Published by Wiley Periodicals, Inc. on behalf of Society of Environmental Toxicology & Chemistry (SETAC).

  5. Nash Social Welfare in Multiagent Resource Allocation

    NASA Astrophysics Data System (ADS)

    Ramezani, Sara; Endriss, Ulle

    We study different aspects of the multiagent resource allocation problem when the objective is to find an allocation that maximizes Nash social welfare, the product of the utilities of the individual agents. The Nash solution is an important welfare criterion that combines efficiency and fairness considerations. We show that the problem of finding an optimal outcome is NP-hard for a number of different languages for representing agent preferences; we establish new results regarding convergence to Nash-optimal outcomes in a distributed negotiation framework; and we design and test algorithms similar to those applied in combinatorial auctions for computing such an outcome directly.

  6. Joint Transmitter and Receiver Power Allocation under Minimax MSE Criterion with Perfect and Imperfect CSI for MC-CDMA Transmissions

    NASA Astrophysics Data System (ADS)

    Kotchasarn, Chirawat; Saengudomlert, Poompat

    We investigate the problem of joint transmitter and receiver power allocation with the minimax mean square error (MSE) criterion for uplink transmissions in a multi-carrier code division multiple access (MC-CDMA) system. The objective of power allocation is to minimize the maximum MSE among all users each of which has limited transmit power. This problem is a nonlinear optimization problem. Using the Lagrange multiplier method, we derive the Karush-Kuhn-Tucker (KKT) conditions which are necessary for a power allocation to be optimal. Numerical results indicate that, compared to the minimum total MSE criterion, the minimax MSE criterion yields a higher total MSE but provides a fairer treatment across the users. The advantages of the minimax MSE criterion are more evident when we consider the bit error rate (BER) estimates. Numerical results show that the minimax MSE criterion yields a lower maximum BER and a lower average BER. We also observe that, with the minimax MSE criterion, some users do not transmit at full power. For comparison, with the minimum total MSE criterion, all users transmit at full power. In addition, we investigate robust joint transmitter and receiver power allocation where the channel state information (CSI) is not perfect. The CSI error is assumed to be unknown but bounded by a deterministic value. This problem is formulated as a semidefinite programming (SDP) problem with bilinear matrix inequality (BMI) constraints. Numerical results show that, with imperfect CSI, the minimax MSE criterion also outperforms the minimum total MSE criterion in terms of the maximum and average BERs.

  7. Ant Colony Optimization Algorithm for Centralized Dynamic Channel Allocation in Multi-Cell OFDMA Systems

    NASA Astrophysics Data System (ADS)

    Kim, Hyo-Su; Kim, Dong-Hoi

    The dynamic channel allocation (DCA) scheme in multi-cell systems causes serious inter-cell interference (ICI) problem to some existing calls when channels for new calls are allocated. Such a problem can be addressed by advanced centralized DCA design that is able to minimize ICI. Thus, in this paper, a centralized DCA is developed for the downlink of multi-cell orthogonal frequency division multiple access (OFDMA) systems with full spectral reuse. However, in practice, as the search space of channel assignment for centralized DCA scheme in multi-cell systems grows exponentially with the increase of the number of required calls, channels, and cells, it becomes an NP-hard problem and is currently too complicated to find an optimum channel allocation. In this paper, we propose an ant colony optimization (ACO) based DCA scheme using a low-complexity ACO algorithm which is a kind of heuristic algorithm in order to solve the aforementioned problem. Simulation results demonstrate significant performance improvements compared to the existing schemes in terms of the grade of service (GoS) performance and the forced termination probability of existing calls without degrading the system performance of the average throughput.

  8. Steps Toward Optimal Competitive Scheduling

    NASA Technical Reports Server (NTRS)

    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 committee is usually in charge of deciding the priority of each mission competing for access to the DSN within a time period while scheduling. Instead, we can assume that the committee assigns a budget to each mission.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 ofsers 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 committee is usually in charge of deciding the priority of each mission competing for access to the DSN within a time period while scheduling. Instead, we can assume that the committee assigns a budget to each mission.

  9. The response of pile-guided floats subjected to dynamic loading.

    DOT National Transportation Integrated Search

    2014-08-01

    Pile-Guided floats can be a desirable alternative to stationary berthing structures. Both floats and guide piles are subjected to dynamic : forces such as wind generated waves and impacts from vessels. This project developed a rational basis for esti...

  10. Performance impact of mutation operators of a subpopulation-based genetic algorithm for multi-robot task allocation problems.

    PubMed

    Liu, Chun; Kroll, Andreas

    2016-01-01

    Multi-robot task allocation determines the task sequence and distribution for a group of robots in multi-robot systems, which is one of constrained combinatorial optimization problems and more complex in case of cooperative tasks because they introduce additional spatial and temporal constraints. To solve multi-robot task allocation problems with cooperative tasks efficiently, a subpopulation-based genetic algorithm, a crossover-free genetic algorithm employing mutation operators and elitism selection in each subpopulation, is developed in this paper. Moreover, the impact of mutation operators (swap, insertion, inversion, displacement, and their various combinations) is analyzed when solving several industrial plant inspection problems. The experimental results show that: (1) the proposed genetic algorithm can obtain better solutions than the tested binary tournament genetic algorithm with partially mapped crossover; (2) inversion mutation performs better than other tested mutation operators when solving problems without cooperative tasks, and the swap-inversion combination performs better than other tested mutation operators/combinations when solving problems with cooperative tasks. As it is difficult to produce all desired effects with a single mutation operator, using multiple mutation operators (including both inversion and swap) is suggested when solving similar combinatorial optimization problems.

  11. Design and Implementation of USAF Avionics Integration Support Facilities

    DTIC Science & Technology

    1981-12-01

    specification for taking the bbranch Vt -Routing indicator (No activity): Allocate Node: All’ocation of resources: R= Allocation rule. Res Resource type number...problems, and the integration and testing of the ECS. The purpose of this investigation is to establish a standard software development system...Corrections to equipment problems. -Compensation for equipment degradation. -New Developments . This approach is intended to centralize essential

  12. Multi-Objective Optimization for Trustworthy Tactical Networks: A Survey and Insights

    DTIC Science & Technology

    2013-06-01

    existing data sources, gathering and maintaining the data needed , and completing and reviewing the collection of information. Send comments regarding...problems: using repeated cooperative games [12], hedonic games [25], and nontransferable utility cooperative games [27]. It should be noted that trust...examined an optimal task allocation problem in a distributed computing system where program modules need to be allocated to different processors to

  13. Self-Coexistence among IEEE 802.22 Networks: Distributed Allocation of Power and Channel

    PubMed Central

    Sakin, Sayef Azad; Alamri, Atif; Tran, Nguyen H.

    2017-01-01

    Ensuring self-coexistence among IEEE 802.22 networks is a challenging problem owing to opportunistic access of incumbent-free radio resources by users in co-located networks. In this study, we propose a fully-distributed non-cooperative approach to ensure self-coexistence in downlink channels of IEEE 802.22 networks. We formulate the self-coexistence problem as a mixed-integer non-linear optimization problem for maximizing the network data rate, which is an NP-hard one. This work explores a sub-optimal solution by dividing the optimization problem into downlink channel allocation and power assignment sub-problems. Considering fairness, quality of service and minimum interference for customer-premises-equipment, we also develop a greedy algorithm for channel allocation and a non-cooperative game-theoretic framework for near-optimal power allocation. The base stations of networks are treated as players in a game, where they try to increase spectrum utilization by controlling power and reaching a Nash equilibrium point. We further develop a utility function for the game to increase the data rate by minimizing the transmission power and, subsequently, the interference from neighboring networks. A theoretical proof of the uniqueness and existence of the Nash equilibrium has been presented. Performance improvements in terms of data-rate with a degree of fairness compared to a cooperative branch-and-bound-based algorithm and a non-cooperative greedy approach have been shown through simulation studies. PMID:29215591

  14. Self-Coexistence among IEEE 802.22 Networks: Distributed Allocation of Power and Channel.

    PubMed

    Sakin, Sayef Azad; Razzaque, Md Abdur; Hassan, Mohammad Mehedi; Alamri, Atif; Tran, Nguyen H; Fortino, Giancarlo

    2017-12-07

    Ensuring self-coexistence among IEEE 802.22 networks is a challenging problem owing to opportunistic access of incumbent-free radio resources by users in co-located networks. In this study, we propose a fully-distributed non-cooperative approach to ensure self-coexistence in downlink channels of IEEE 802.22 networks. We formulate the self-coexistence problem as a mixed-integer non-linear optimization problem for maximizing the network data rate, which is an NP-hard one. This work explores a sub-optimal solution by dividing the optimization problem into downlink channel allocation and power assignment sub-problems. Considering fairness, quality of service and minimum interference for customer-premises-equipment, we also develop a greedy algorithm for channel allocation and a non-cooperative game-theoretic framework for near-optimal power allocation. The base stations of networks are treated as players in a game, where they try to increase spectrum utilization by controlling power and reaching a Nash equilibrium point. We further develop a utility function for the game to increase the data rate by minimizing the transmission power and, subsequently, the interference from neighboring networks. A theoretical proof of the uniqueness and existence of the Nash equilibrium has been presented. Performance improvements in terms of data-rate with a degree of fairness compared to a cooperative branch-and-bound-based algorithm and a non-cooperative greedy approach have been shown through simulation studies.

  15. Integration and Task Allocation: Evidence from Patient Care*

    PubMed Central

    David, Guy; Rawley, Evan; Polsky, Daniel

    2013-01-01

    Using the universe of patient transitions from inpatient hospital care to skilled nursing facilities and home health care in 2005, we show how integration eliminates task misallocation problems between organizations. We find that vertical integration allows hospitals to shift patient recovery tasks downstream to lower-cost organizations by discharging patients earlier (and in poorer health) and increasing post-hospitalization service intensity. While integration facilitates a shift in the allocation of tasks and resources, health outcomes either improved or were unaffected by integration on average. The evidence suggests that integration solves coordination problems that arise in market exchange through improvements in the allocation of tasks across care settings. PMID:24415893

  16. Resource allocation for multichannel broadcasting visible light communication

    NASA Astrophysics Data System (ADS)

    Le, Nam-Tuan; Jang, Yeong Min

    2015-11-01

    Visible light communication (VLC), which offers the possibility of using light sources for both illumination and data communications simultaneously, will be a promising incorporation technique with lighting applications. However, it still remains some challenges especially coverage because of field-of-view limitation. In this paper, we focus on this issue by suggesting a resource allocation scheme for VLC broadcasting system. By using frame synchronization and a network calculus QoS approximation, as well as diversity technology, the proposed VLC architecture and QoS resource allocation for the multichannel-broadcasting MAC (medium access control) protocol can solve the coverage limitation problem and the link switching problem of exhibition service.

  17. DETAIL ELEVATION SHOWING THE ROOF TRUSSES, PURLINS, AND SKYLIGHT. NOTE ...

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

    DETAIL ELEVATION SHOWING THE ROOF TRUSSES, PURLINS, AND SKYLIGHT. NOTE THE DOORS TO THE WEIGHTLIFTING ROOM. VIEW FACING SOUTHEAST - U.S. Naval Base, Pearl Harbor, Gymnasium Building, North Waterfront & Pierce Street near Berth S-13, Pearl City, Honolulu County, HI

  18. 21. FANTAIL DECK, SHOWING DETAIL OF DECK EXTENSION AND EXTERIOR ...

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

    21. FANTAIL DECK, SHOWING DETAIL OF DECK EXTENSION AND EXTERIOR LOCKING MECHANISM ON HATCH DOOR TO CREW'S BERTHING. - U.S. Coast Guard Cutter WHITE LUPINE, U.S. Coast Guard Station Rockland, east end of Tillson Avenue, Rockland, Knox County, ME

  19. DETAIL OF ORIGINAL SLIDING DOORS ALTERED WITH OPENING FOR HINGED ...

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

    DETAIL OF ORIGINAL SLIDING DOORS ALTERED WITH OPENING FOR HINGED DOOR. WITH GRADUATED SCALE IN 1' INCREMENTS. VIEW FACING NORTHWEST - U.S. Naval Base, Pearl Harbor, Gymnasium Building, North Waterfront & Pierce Street near Berth S-13, Pearl City, Honolulu County, HI

  20. DETAIL OF ORIGINAL SIXOVERSIXLIGHT DOUBLEHUNG SASH WINDOWS WITH GRADUATED SCALE ...

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

    DETAIL OF ORIGINAL SIX-OVER-SIX-LIGHT DOUBLE-HUNG SASH WINDOWS WITH GRADUATED SCALE IN 1' INCREMENTS. VIEW FACING NORTHWEST - U.S. Naval Base, Pearl Harbor, Gymnasium Building, North Waterfront & Pierce Street near Berth S-13, Pearl City, Honolulu County, HI

  1. DETAIL OF THE INTERIOR WALL VENTILATION BAND FROM THE MAIN ...

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

    DETAIL OF THE INTERIOR WALL VENTILATION BAND FROM THE MAIN GYMNASIUM AREA TO THE LOCKER ROOM AREA. VIEW FACING WEST - U.S. Naval Base, Pearl Harbor, Gymnasium Building, North Waterfront & Pierce Street near Berth S-13, Pearl City, Honolulu County, HI

  2. 33 CFR 149.680 - What are the requirements for medical treatment rooms?

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... on a stretcher; (c) A single berth or examination table that is accessible from both sides; and (d) A... accommodation modules, must have a medical treatment room that has: (a) A sign at the entrance designating it as...

  3. 33 CFR 149.680 - What are the requirements for medical treatment rooms?

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... on a stretcher; (c) A single berth or examination table that is accessible from both sides; and (d) A... accommodation modules, must have a medical treatment room that has: (a) A sign at the entrance designating it as...

  4. Definition of technology development missions for early space station, orbit transfer vehicle servicing, volume 2

    NASA Technical Reports Server (NTRS)

    1983-01-01

    Propellant transfer, storage, and reliquefaction TDM; docking and berthing technology development mission; maintenance technology development mission; OTV/payload integration, space station interface/accommodations; combined TDM conceptual design; programmatic analysis; and TDM equipment usage are discussed.

  5. Efficient Pricing Technique for Resource Allocation Problem in Downlink OFDM Cognitive Radio Networks

    NASA Astrophysics Data System (ADS)

    Abdulghafoor, O. B.; Shaat, M. M. R.; Ismail, M.; Nordin, R.; Yuwono, T.; Alwahedy, O. N. A.

    2017-05-01

    In this paper, the problem of resource allocation in OFDM-based downlink cognitive radio (CR) networks has been proposed. The purpose of this research is to decrease the computational complexity of the resource allocation algorithm for downlink CR network while concerning the interference constraint of primary network. The objective has been secured by adopting pricing scheme to develop power allocation algorithm with the following concerns: (i) reducing the complexity of the proposed algorithm and (ii) providing firm power control to the interference introduced to primary users (PUs). The performance of the proposed algorithm is tested for OFDM- CRNs. The simulation results show that the performance of the proposed algorithm approached the performance of the optimal algorithm at a lower computational complexity, i.e., O(NlogN), which makes the proposed algorithm suitable for more practical applications.

  6. Methodology for Developing a Probabilistic Risk Assessment Model of Spacecraft Rendezvous and Dockings

    NASA Technical Reports Server (NTRS)

    Farnham, Steven J., II; Garza, Joel, Jr.; Castillo, Theresa M.; Lutomski, Michael

    2011-01-01

    In 2007 NASA was preparing to send two new visiting vehicles carrying logistics and propellant to the International Space Station (ISS). These new vehicles were the European Space Agency s (ESA) Automated Transfer Vehicle (ATV), the Jules Verne, and the Japanese Aerospace and Explorations Agency s (JAXA) H-II Transfer Vehicle (HTV). The ISS Program wanted to quantify the increased risk to the ISS from these visiting vehicles. At the time, only the Shuttle, the Soyuz, and the Progress vehicles rendezvoused and docked to the ISS. The increased risk to the ISS was from an increase in vehicle traffic, thereby, increasing the potential catastrophic collision during the rendezvous and the docking or berthing of the spacecraft to the ISS. A universal method of evaluating the risk of rendezvous and docking or berthing was created by the ISS s Risk Team to accommodate the increasing number of rendezvous and docking or berthing operations due to the increasing number of different spacecraft, as well as the future arrival of commercial spacecraft. Before the first docking attempt of ESA's ATV and JAXA's HTV to the ISS, a probabilistic risk model was developed to quantitatively calculate the risk of collision of each spacecraft with the ISS. The 5 rendezvous and docking risk models (Soyuz, Progress, Shuttle, ATV, and HTV) have been used to build and refine the modeling methodology for rendezvous and docking of spacecrafts. This risk modeling methodology will be NASA s basis for evaluating the addition of future ISS visiting spacecrafts hazards, including SpaceX s Dragon, Orbital Science s Cygnus, and NASA s own Orion spacecraft. This paper will describe the methodology used for developing a visiting vehicle risk model.

  7. Operations Research Applied to Libraries.

    ERIC Educational Resources Information Center

    Nussbaum, Harvey

    This report discusses the seven basic types of problems found in business and industry as they apply to library institutions. These seven basic types are: (1) inventory problems, (2) allocation problems, (3) queueing problems, (4) sequencing problems, (5) routing problems, (6) replacement problems and (7) search problems. (MF)

  8. Distributed Multi-Cell Resource Allocation with Price Based ICI Coordination in Downlink OFDMA Networks

    NASA Astrophysics Data System (ADS)

    Lv, Gangming; Zhu, Shihua; Hui, Hui

    Multi-cell resource allocation under minimum rate request for each user in OFDMA networks is addressed in this paper. Based on Lagrange dual decomposition theory, the joint multi-cell resource allocation problem is decomposed and modeled as a limited-cooperative game, and a distributed multi-cell resource allocation algorithm is thus proposed. Analysis and simulation results show that, compared with non-cooperative iterative water-filling algorithm, the proposed algorithm can remarkably reduce the ICI level and improve overall system performances.

  9. The Conference Proceedings of the 1997 Air Transport Research Group (ATRG) of the WCTR Society. Volume 3

    NASA Technical Reports Server (NTRS)

    Oum, T. H.; Bowen, B. D.

    1997-01-01

    This paper covers topics such as: Safety and Air Fares; International Airline Safety; Multi-fare Seat Allocation Problem; Dynamic Allocation of Airline Seat Inventory; Seat Allocation on Flights with Two Fares; Effects of Intercontinental Alliances; Domestic Airline Mergers; Simulating the Effects of Airline Deregulation on Frequency Choice; and Firm Size Inequality and Market Power.

  10. Summary of Research 1997 Department of Systems Management.

    DTIC Science & Technology

    1999-01-01

    formulation and execution; impacts of budget allocation , reallocation, and reduction; imple- mentation of Defense Resource Management Systems; and the...flexible structure that can be applied to a wide range of resource allocation problems. PUBLICATIONS: Dolk, D., Murphy, M., and Thomas, G...policies, procedures, and rationale in deter- mining recruiting resource allocation decisions. The methodology relies on a review of the literature

  11. The response of pile-guided floats subjected to dynamic loading : volume I final report.

    DOT National Transportation Integrated Search

    2014-08-01

    Pile : - : Guided floats can be a desirable alternative to stationary berthing structures. Both floats and guide piles are subjected to dynamic : forces such as wind generated waves and impacts from vessels. This project developed a rational basis fo...

  12. The response of pile-guided floats subjected to dynamic loading : volume II annex.

    DOT National Transportation Integrated Search

    2014-08-01

    Pile-Guided floats can be a desirable alternative to stationary berthing structures. Both floats and guide piles are subjected to dynamic : forces such as wind generated waves and impacts from vessels. This project developed a rational basis for esti...

  13. Krikalev with CPAs in Node 1/Unity CBA

    NASA Image and Video Library

    2005-06-21

    ISS011-E-09392 (21 June 2005) --- Cosmonaut Sergei K. Krikalev, Expedition 11 commander representing Russia's Federal Space Agency, moves one of the two Control Panel Assemblies (CPA) from the Unity node’s Common Berthing Assembly (CBA) on the International Space Station (ISS).

  14. 46 CFR 190.20-45 - Lighting.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 46 Shipping 7 2010-10-01 2010-10-01 false Lighting. 190.20-45 Section 190.20-45 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) OCEANOGRAPHIC RESEARCH VESSELS CONSTRUCTION AND ARRANGEMENT Accomodations for Officers, Crew, and Scientific Personnel § 190.20-45 Lighting. Each berth must...

  15. Methods for Allocating Highway Costs

    DOT National Transportation Integrated Search

    1981-04-01

    Microeconomic theory and other concepts related to pricing are reviewed and applied to the problem of designing highway user charges. In view of the emphasis in the Congressional request for the Highway Cost Allocation Study on setting charges in acc...

  16. Asynchronous Incremental Stochastic Dual Descent Algorithm for Network Resource Allocation

    NASA Astrophysics Data System (ADS)

    Bedi, Amrit Singh; Rajawat, Ketan

    2018-05-01

    Stochastic network optimization problems entail finding resource allocation policies that are optimum on an average but must be designed in an online fashion. Such problems are ubiquitous in communication networks, where resources such as energy and bandwidth are divided among nodes to satisfy certain long-term objectives. This paper proposes an asynchronous incremental dual decent resource allocation algorithm that utilizes delayed stochastic {gradients} for carrying out its updates. The proposed algorithm is well-suited to heterogeneous networks as it allows the computationally-challenged or energy-starved nodes to, at times, postpone the updates. The asymptotic analysis of the proposed algorithm is carried out, establishing dual convergence under both, constant and diminishing step sizes. It is also shown that with constant step size, the proposed resource allocation policy is asymptotically near-optimal. An application involving multi-cell coordinated beamforming is detailed, demonstrating the usefulness of the proposed algorithm.

  17. Decision-theoretic methodology for reliability and risk allocation in nuclear power plants

    DOE Office of Scientific and Technical Information (OSTI.GOV)

    Cho, N.Z.; Papazoglou, I.A.; Bari, R.A.

    1985-01-01

    This paper describes a methodology for allocating reliability and risk to various reactor systems, subsystems, components, operations, and structures in a consistent manner, based on a set of global safety criteria which are not rigid. The problem is formulated as a multiattribute decision analysis paradigm; the multiobjective optimization, which is performed on a PRA model and reliability cost functions, serves as the guiding principle for reliability and risk allocation. The concept of noninferiority is used in the multiobjective optimization problem. Finding the noninferior solution set is the main theme of the current approach. The assessment of the decision maker's preferencesmore » could then be performed more easily on the noninferior solution set. Some results of the methodology applications to a nontrivial risk model are provided and several outstanding issues such as generic allocation and preference assessment are discussed.« less

  18. Arithmetic and algebraic problem solving and resource allocation: the distinct impact of fluid and numerical intelligence.

    PubMed

    Dix, Annika; van der Meer, Elke

    2015-04-01

    This study investigates cognitive resource allocation dependent on fluid and numerical intelligence in arithmetic/algebraic tasks varying in difficulty. Sixty-six 11th grade students participated in a mathematical verification paradigm, while pupil dilation as a measure of resource allocation was collected. Students with high fluid intelligence solved the tasks faster and more accurately than those with average fluid intelligence, as did students with high compared to average numerical intelligence. However, fluid intelligence sped up response times only in students with average but not high numerical intelligence. Further, high fluid but not numerical intelligence led to greater task-related pupil dilation. We assume that fluid intelligence serves as a domain-general resource that helps to tackle problems for which domain-specific knowledge (numerical intelligence) is missing. The allocation of this resource can be measured by pupil dilation. Copyright © 2014 Society for Psychophysiological Research.

  19. A Review of Function Allocation and En Route Separation Assurance

    NASA Technical Reports Server (NTRS)

    Lewis, Timothy A.; Aweiss, Arwa S.; Guerreiro, Nelson M.; Daiker, Ronald J.

    2016-01-01

    Today's air traffic control system has reached a limit to the number of aircraft that can be safely managed at the same time. This air traffic capacity bottleneck is a critical problem along the path to modernization for air transportation. The design of the next separation assurance system to address this problem is a cornerstone of air traffic management research today. This report reviews recent work by NASA and others in the areas of function allocation and en route separation assurance. This includes: separation assurance algorithms and technology prototypes; concepts of operations and designs for advanced separation assurance systems; and specific investigations into air-ground and human-automation function allocation.

  20. A note on resource allocation scheduling with group technology and learning effects on a single machine

    NASA Astrophysics Data System (ADS)

    Lu, Yuan-Yuan; Wang, Ji-Bo; Ji, Ping; He, Hongyu

    2017-09-01

    In this article, single-machine group scheduling with learning effects and convex resource allocation is studied. The goal is to find the optimal job schedule, the optimal group schedule, and resource allocations of jobs and groups. For the problem of minimizing the makespan subject to limited resource availability, it is proved that the problem can be solved in polynomial time under the condition that the setup times of groups are independent. For the general setup times of groups, a heuristic algorithm and a branch-and-bound algorithm are proposed, respectively. Computational experiments show that the performance of the heuristic algorithm is fairly accurate in obtaining near-optimal solutions.

  1. Divergence in plant and microbial allocation strategies explains continental patterns in microbial allocation and biogeochemical fluxes.

    PubMed

    Averill, Colin

    2014-10-01

    Allocation trade-offs shape ecological and biogeochemical phenomena at local to global scale. Plant allocation strategies drive major changes in ecosystem carbon cycling. Microbial allocation to enzymes that decompose carbon vs. organic nutrients may similarly affect ecosystem carbon cycling. Current solutions to this allocation problem prioritise stoichiometric tradeoffs implemented in plant ecology. These solutions may not maximise microbial growth and fitness under all conditions, because organic nutrients are also a significant carbon resource for microbes. I created multiple allocation frameworks and simulated microbial growth using a microbial explicit biogeochemical model. I demonstrate that prioritising stoichiometric trade-offs does not optimise microbial allocation, while exploiting organic nutrients as carbon resources does. Analysis of continental-scale enzyme data supports the allocation patterns predicted by this framework, and modelling suggests large deviations in soil C loss based on which strategy is implemented. Therefore, understanding microbial allocation strategies will likely improve our understanding of carbon cycling and climate. © 2014 John Wiley & Sons Ltd/CNRS.

  2. Decision rules for allocation of finances to health systems strengthening

    PubMed Central

    Morton, Alec; Thomas, Ranjeeta; Smith, Peter C.

    2017-01-01

    A key dilemma in global health is how to allocate funds between disease-specific “vertical projects” on the one hand and “horizontal programmes” which aim to strengthen the entire health system on the other. While economic evaluation provides a way of approaching the prioritisation of vertical projects, it provides less guidance on how to prioritise between horizontal and vertical spending. We approach this problem by formulating a mathematical program which captures the complementary benefits of funding both vertical projects and horizontal programmes. We show that our solution to this math program has an appealing intuitive structure. We illustrate our model by computationally solving two specialised versions of this problem, with illustrations based on the problem of allocating funding for infectious diseases in sub-Saharan Africa. We conclude by reflecting on how such a model may be developed in the future and used to guide empirical data collection and theory development. PMID:27394006

  3. Efficient Simulation Budget Allocation for Selecting an Optimal Subset

    NASA Technical Reports Server (NTRS)

    Chen, Chun-Hung; He, Donghai; Fu, Michael; Lee, Loo Hay

    2008-01-01

    We consider a class of the subset selection problem in ranking and selection. The objective is to identify the top m out of k designs based on simulated output. Traditional procedures are conservative and inefficient. Using the optimal computing budget allocation framework, we formulate the problem as that of maximizing the probability of correc tly selecting all of the top-m designs subject to a constraint on the total number of samples available. For an approximation of this corre ct selection probability, we derive an asymptotically optimal allocat ion and propose an easy-to-implement heuristic sequential allocation procedure. Numerical experiments indicate that the resulting allocatio ns are superior to other methods in the literature that we tested, and the relative efficiency increases for larger problems. In addition, preliminary numerical results indicate that the proposed new procedur e has the potential to enhance computational efficiency for simulation optimization.

  4. Distributed Optimal Consensus Over Resource Allocation Network and Its Application to Dynamical Economic Dispatch.

    PubMed

    Li, Chaojie; Yu, Xinghuo; Huang, Tingwen; He, Xing; Chaojie Li; Xinghuo Yu; Tingwen Huang; Xing He; Li, Chaojie; Huang, Tingwen; He, Xing; Yu, Xinghuo

    2018-06-01

    The resource allocation problem is studied and reformulated by a distributed interior point method via a -logarithmic barrier. By the facilitation of the graph Laplacian, a fully distributed continuous-time multiagent system is developed for solving the problem. Specifically, to avoid high singularity of the -logarithmic barrier at boundary, an adaptive parameter switching strategy is introduced into this dynamical multiagent system. The convergence rate of the distributed algorithm is obtained. Moreover, a novel distributed primal-dual dynamical multiagent system is designed in a smart grid scenario to seek the saddle point of dynamical economic dispatch, which coincides with the optimal solution. The dual decomposition technique is applied to transform the optimization problem into easily solvable resource allocation subproblems with local inequality constraints. The good performance of the new dynamical systems is, respectively, verified by a numerical example and the IEEE six-bus test system-based simulations.

  5. Ferry Terminals and Small Craft Berthing Facilities. Design Manual 25.5.

    DTIC Science & Technology

    1981-07-01

    become water-logged and sink in a few years. Use is generally not recommended. (2) Extruded polystyrene (Styrofoam). Available in several sizes of precast...Supplemental facilities, such as boardroom, coffee- break room or snack bar, engineering room, and storage room, fol large installations. b

  6. 46 CFR 108.199 - Arrangement of sleeping spaces.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 46 Shipping 4 2014-10-01 2014-10-01 false Arrangement of sleeping spaces. 108.199 Section 108.199... AND EQUIPMENT Construction and Arrangement Accommodation Spaces § 108.199 Arrangement of sleeping spaces. To the extent practicable, each occupation group must be berthed together in sleeping spaces...

  7. 46 CFR 108.199 - Arrangement of sleeping spaces.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 46 Shipping 4 2011-10-01 2011-10-01 false Arrangement of sleeping spaces. 108.199 Section 108.199... AND EQUIPMENT Construction and Arrangement Accommodation Spaces § 108.199 Arrangement of sleeping spaces. To the extent practicable, each occupation group must be berthed together in sleeping spaces...

  8. 46 CFR 108.199 - Arrangement of sleeping spaces.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 46 Shipping 4 2010-10-01 2010-10-01 false Arrangement of sleeping spaces. 108.199 Section 108.199... AND EQUIPMENT Construction and Arrangement Accommodation Spaces § 108.199 Arrangement of sleeping spaces. To the extent practicable, each occupation group must be berthed together in sleeping spaces...

  9. 46 CFR 108.199 - Arrangement of sleeping spaces.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 46 Shipping 4 2012-10-01 2012-10-01 false Arrangement of sleeping spaces. 108.199 Section 108.199... AND EQUIPMENT Construction and Arrangement Accommodation Spaces § 108.199 Arrangement of sleeping spaces. To the extent practicable, each occupation group must be berthed together in sleeping spaces...

  10. 46 CFR 108.199 - Arrangement of sleeping spaces.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 46 Shipping 4 2013-10-01 2013-10-01 false Arrangement of sleeping spaces. 108.199 Section 108.199... AND EQUIPMENT Construction and Arrangement Accommodation Spaces § 108.199 Arrangement of sleeping spaces. To the extent practicable, each occupation group must be berthed together in sleeping spaces...

  11. Krikalev with CPAs in Node 1/Unity CBA

    NASA Image and Video Library

    2005-06-21

    ISS011-E-09373 (21 June 2005) --- Cosmonaut Sergei K. Krikalev, Expedition 11 commander representing Russia's Federal Space Agency, prepares to uninstall two of the four Control Panel Assemblies (CPA) from the Unity node’s Common Berthing Assembly (CBA) on the International Space Station (ISS).

  12. 50 CFR 600.1202 - Definitions.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... at a dock, berth, beach, seawall, or ramp to begin offloading fish. Shark finning means taking a..., DEPARTMENT OF COMMERCE MAGNUSON-STEVENS ACT PROVISIONS Shark Finning § 600.1202 Definitions. (a) In addition... the following meanings: Land or landing means offloading fish, or causing fish to be offloaded, from a...

  13. 50 CFR 600.1202 - Definitions.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... at a dock, berth, beach, seawall, or ramp to begin offloading fish. Shark finning means taking a..., DEPARTMENT OF COMMERCE MAGNUSON-STEVENS ACT PROVISIONS Shark Finning § 600.1202 Definitions. (a) In addition... the following meanings: Land or landing means offloading fish, or causing fish to be offloaded, from a...

  14. Concurrent airline fleet allocation and aircraft design with profit modeling for multiple airlines

    NASA Astrophysics Data System (ADS)

    Govindaraju, Parithi

    A "System of Systems" (SoS) approach is particularly beneficial in analyzing complex large scale systems comprised of numerous independent systems -- each capable of independent operations in their own right -- that when brought in conjunction offer capabilities and performance beyond the constituents of the individual systems. The variable resource allocation problem is a type of SoS problem, which includes the allocation of "yet-to-be-designed" systems in addition to existing resources and systems. The methodology presented here expands upon earlier work that demonstrated a decomposition approach that sought to simultaneously design a new aircraft and allocate this new aircraft along with existing aircraft in an effort to meet passenger demand at minimum fleet level operating cost for a single airline. The result of this describes important characteristics of the new aircraft. The ticket price model developed and implemented here enables analysis of the system using profit maximization studies instead of cost minimization. A multiobjective problem formulation has been implemented to determine characteristics of a new aircraft that maximizes the profit of multiple airlines to recognize the fact that aircraft manufacturers sell their aircraft to multiple customers and seldom design aircraft customized to a single airline's operations. The route network characteristics of two simple airlines serve as the example problem for the initial studies. The resulting problem formulation is a mixed-integer nonlinear programming problem, which is typically difficult to solve. A sequential decomposition strategy is applied as a solution methodology by segregating the allocation (integer programming) and aircraft design (non-linear programming) subspaces. After solving a simple problem considering two airlines, the decomposition approach is then applied to two larger airline route networks representing actual airline operations in the year 2005. The decomposition strategy serves as a promising technique for future detailed analyses. Results from the profit maximization studies favor a smaller aircraft in terms of passenger capacity due to its higher yield generation capability on shorter routes while results from the cost minimization studies favor a larger aircraft due to its lower direct operating cost per seat mile.

  15. Decomposition method for zonal resource allocation problems in telecommunication networks

    NASA Astrophysics Data System (ADS)

    Konnov, I. V.; Kashuba, A. Yu

    2016-11-01

    We consider problems of optimal resource allocation in telecommunication networks. We first give an optimization formulation for the case where the network manager aims to distribute some homogeneous resource (bandwidth) among users of one region with quadratic charge and fee functions and present simple and efficient solution methods. Next, we consider a more general problem for a provider of a wireless communication network divided into zones (clusters) with common capacity constraints. We obtain a convex quadratic optimization problem involving capacity and balance constraints. By using the dual Lagrangian method with respect to the capacity constraint, we suggest to reduce the initial problem to a single-dimensional optimization problem, but calculation of the cost function value leads to independent solution of zonal problems, which coincide with the above single region problem. Some results of computational experiments confirm the applicability of the new methods.

  16. Multicriterion problem of allocation of resources in the heterogeneous distributed information processing systems

    NASA Astrophysics Data System (ADS)

    Antamoshkin, O. A.; Kilochitskaya, T. R.; Ontuzheva, G. A.; Stupina, A. A.; Tynchenko, V. S.

    2018-05-01

    This study reviews the problem of allocation of resources in the heterogeneous distributed information processing systems, which may be formalized in the form of a multicriterion multi-index problem with the linear constraints of the transport type. The algorithms for solution of this problem suggest a search for the entire set of Pareto-optimal solutions. For some classes of hierarchical systems, it is possible to significantly speed up the procedure of verification of a system of linear algebraic inequalities for consistency due to the reducibility of them to the stream models or the application of other solution schemes (for strongly connected structures) that take into account the specifics of the hierarchies under consideration.

  17. A Solution Method of Scheduling Problem with Worker Allocation by a Genetic Algorithm

    NASA Astrophysics Data System (ADS)

    Osawa, Akira; Ida, Kenichi

    In a scheduling problem with worker allocation (SPWA) proposed by Iima et al, the worker's skill level to each machine is all the same. However, each worker has a different skill level for each machine in the real world. For that reason, we propose a new model of SPWA in which a worker has the different skill level to each machine. To solve the problem, we propose a new GA for SPWA consisting of the following new three procedures, shortening of idle time, modifying infeasible solution to feasible solution, and a new selection method for GA. The effectiveness of the proposed algorithm is clarified by numerical experiments using benchmark problems for job-shop scheduling.

  18. Optimal allocation of trend following strategies

    NASA Astrophysics Data System (ADS)

    Grebenkov, Denis S.; Serror, Jeremy

    2015-09-01

    We consider a portfolio allocation problem for trend following (TF) strategies on multiple correlated assets. Under simplifying assumptions of a Gaussian market and linear TF strategies, we derive analytical formulas for the mean and variance of the portfolio return. We construct then the optimal portfolio that maximizes risk-adjusted return by accounting for inter-asset correlations. The dynamic allocation problem for n assets is shown to be equivalent to the classical static allocation problem for n2 virtual assets that include lead-lag corrections in positions of TF strategies. The respective roles of asset auto-correlations and inter-asset correlations are investigated in depth for the two-asset case and a sector model. In contrast to the principle of diversification suggesting to treat uncorrelated assets, we show that inter-asset correlations allow one to estimate apparent trends more reliably and to adjust the TF positions more efficiently. If properly accounted for, inter-asset correlations are not deteriorative but beneficial for portfolio management that can open new profit opportunities for trend followers. These concepts are illustrated using daily returns of three highly correlated futures markets: the E-mini S&P 500, Euro Stoxx 50 index, and the US 10-year T-note futures.

  19. ELEVATION OF FACILITY 667 WITH GRADUATED SCALE IN 1' INCREMENTS. ...

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

    ELEVATION OF FACILITY 667 WITH GRADUATED SCALE IN 1' INCREMENTS. NOTE: THE TORPEDO IN THE FOREGROUND IS A DISPLAY ASSOCIATED WITH FACILITY 683. VIEW FACING NORTHEAST - U.S. Naval Base, Pearl Harbor, Gymnasium Building, North Waterfront & Pierce Street near Berth S-13, Pearl City, Honolulu County, HI

  20. VIEW OF THE ROOF TRUSSES OF THE MEN'S LOCKER ROOM. ...

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

    VIEW OF THE ROOF TRUSSES OF THE MEN'S LOCKER ROOM. NOTE THE WIDENED BAND OF VENTILATION SECREENING TO THE OUTSIDE AT THE EAVES (LEFT). VIEW FACING NORTHEAST - U.S. Naval Base, Pearl Harbor, Gymnasium Building, North Waterfront & Pierce Street near Berth S-13, Pearl City, Honolulu County, HI

  1. Fiber reinforced polymer (FRP) composite piles used on pier rehabilitation, Little Diamond Island, Casco Bay, Portland, Maine.

    DOT National Transportation Integrated Search

    2012-10-01

    Fiber reinforced polymer (FRP) composite piles were used on a pier rehabilitation project at : Little Diamond Island in Casco Bay near Portland Maine. The project was the replacement : of an aging wooden pier at the ferry berthing terminal. The FRP p...

  2. 46 CFR 315.5 - Appointment of agents.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... Agent by MARAD, the contracting office shall transmit the Service Agreement or Ship Manager contract to... Agreement and Ship Manager Contract may be obtained from the Office of Acquisition at the address appearing... appointment as General Agent, Berth Agent or Ship Manager may be obtained from, and inquiries and other...

  3. 46 CFR 315.5 - Appointment of agents.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... Agent by MARAD, the contracting office shall transmit the Service Agreement or Ship Manager contract to... Agreement and Ship Manager Contract may be obtained from the Office of Acquisition at the address appearing... appointment as General Agent, Berth Agent or Ship Manager may be obtained from, and inquiries and other...

  4. 46 CFR 315.5 - Appointment of agents.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... Agent by MARAD, the contracting office shall transmit the Service Agreement or Ship Manager contract to... Agreement and Ship Manager Contract may be obtained from the Office of Acquisition at the address appearing... appointment as General Agent, Berth Agent or Ship Manager may be obtained from, and inquiries and other...

  5. 46 CFR 108.201 - Size of sleeping spaces.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 46 Shipping 4 2011-10-01 2011-10-01 false Size of sleeping spaces. 108.201 Section 108.201... AND EQUIPMENT Construction and Arrangement Accommodation Spaces § 108.201 Size of sleeping spaces. (a) No sleeping space may berth more than four persons, except that a sleeping space for personnel not...

  6. 46 CFR 108.201 - Size of sleeping spaces.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 46 Shipping 4 2014-10-01 2014-10-01 false Size of sleeping spaces. 108.201 Section 108.201... AND EQUIPMENT Construction and Arrangement Accommodation Spaces § 108.201 Size of sleeping spaces. (a) No sleeping space may berth more than four persons, except that a sleeping space for personnel not...

  7. 46 CFR 108.201 - Size of sleeping spaces.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 46 Shipping 4 2012-10-01 2012-10-01 false Size of sleeping spaces. 108.201 Section 108.201... AND EQUIPMENT Construction and Arrangement Accommodation Spaces § 108.201 Size of sleeping spaces. (a) No sleeping space may berth more than four persons, except that a sleeping space for personnel not...

  8. 46 CFR 108.201 - Size of sleeping spaces.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 46 Shipping 4 2010-10-01 2010-10-01 false Size of sleeping spaces. 108.201 Section 108.201... AND EQUIPMENT Construction and Arrangement Accommodation Spaces § 108.201 Size of sleeping spaces. (a) No sleeping space may berth more than four persons, except that a sleeping space for personnel not...

  9. U.S. ports and the funding of intermodal facilities : an overview of key issues

    DOT National Transportation Integrated Search

    2000-03-28

    The growing us eof containers to move freight has led carriers to use fewer but larger ports. In their efforts to attract and retain carriers, U.S. ports have made or are planning substantial investments in new berths, docks, and improved connections...

  10. 50 CFR 600.1202 - Definitions.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ..., DEPARTMENT OF COMMERCE MAGNUSON-STEVENS ACT PROVISIONS Shark Finning § 600.1202 Definitions. (a) In addition... at a dock, berth, beach, seawall, or ramp to begin offloading fish. Shark finning means taking a shark, removing a fin or fins (whether or not including the tail), and returning the remainder of the...

  11. 50 CFR 600.1202 - Definitions.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ..., DEPARTMENT OF COMMERCE MAGNUSON-STEVENS ACT PROVISIONS Shark Finning § 600.1202 Definitions. (a) In addition... at a dock, berth, beach, seawall, or ramp to begin offloading fish. Shark finning means taking a shark, removing a fin or fins (whether or not including the tail), and returning the remainder of the...

  12. 50 CFR 600.1202 - Definitions.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ..., DEPARTMENT OF COMMERCE MAGNUSON-STEVENS ACT PROVISIONS Shark Finning § 600.1202 Definitions. (a) In addition... at a dock, berth, beach, seawall, or ramp to begin offloading fish. Shark finning means taking a shark, removing a fin or fins (whether or not including the tail), and returning the remainder of the...

  13. Definition of technology development missions for early space station, orbit transfer vehicle servicing. Volume 1: Executive summary

    NASA Technical Reports Server (NTRS)

    1983-01-01

    Orbital Transfer Vehicle (OTV) servicing study scope, propellant transfer, storage and reliquefaction technology development missions (TDM), docking and berthing TDM, maintenance TDM, OTV/payload integration TDM, combined TDMS design, summary space station accomodations, programmatic analysis, and TDM equipment operational usage are discussed.

  14. 29 CFR 1917.2 - Definitions.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... terminal and used with a vessel's cargo gear to load or unload by means of married falls. Inspection, as... examination of all visible parts of the device. Intermodal container means a reusable cargo container of a... terminal immediately adjacent to a vessel berth and used in the direct transfer of cargo between the...

  15. 29 CFR 1917.2 - Definitions.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... terminal and used with a vessel's cargo gear to load or unload by means of married falls. Inspection, as... examination of all visible parts of the device. Intermodal container means a reusable cargo container of a... terminal immediately adjacent to a vessel berth and used in the direct transfer of cargo between the...

  16. 29 CFR 1917.2 - Definitions.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... terminal and used with a vessel's cargo gear to load or unload by means of married falls. Inspection, as... examination of all visible parts of the device. Intermodal container means a reusable cargo container of a... terminal immediately adjacent to a vessel berth and used in the direct transfer of cargo between the...

  17. 76 FR 38155 - California State Nonroad Engine Pollution Control Standards; Ocean-Going Vessels At-Berth in...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-06-29

    ... composed solely of container or refrigerated cargo vessels making fewer than twenty-five (25) visits to the.... \\7\\ ``Fleet'' means ``all container, passenger, and refrigerated cargo vessels, visiting a specific... of nitrogen and particulate matter from auxiliary diesel engines on container vessels, passenger...

  18. 29 CFR 1917.2 - Definitions.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... terminal and used with a vessel's cargo gear to load or unload by means of married falls. Inspection, as... examination of all visible parts of the device. Intermodal container means a reusable cargo container of a... terminal immediately adjacent to a vessel berth and used in the direct transfer of cargo between the...

  19. 29 CFR 1917.2 - Definitions.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... terminal and used with a vessel's cargo gear to load or unload by means of married falls. Inspection, as... examination of all visible parts of the device. Intermodal container means a reusable cargo container of a... terminal immediately adjacent to a vessel berth and used in the direct transfer of cargo between the...

  20. 77 FR 24556 - Waiver of Acceptable Risk Restriction for Launch and Reentry

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-04-24

    ... designed to stimulate efforts by the private sector to demonstrate safe, reliable, and cost-effective space... ensure safe approach and berthing with the International Space Station, utilizing considerable fuel. In... economic growth and entrepreneurial activity through use of the space environment; (2) to encourage the...

  1. 78 FR 29687 - Ocean Dumping; Atchafalaya-West Ocean Dredged Material Disposal Site Designation

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-05-21

    ..., including the Department of Defense. Industry and general public Port authorities, marinas and harbors... owning and/or responsible for ports, harbors, and/or berths, Government agencies requiring disposal of... the ODMDS-East. Background suspended solids concentrations were approximately 100 mg/L and currents...

  2. 33 CFR 110.230 - Puget Sound Area, Wash.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... radar reflector screens of metal of sufficient size to permit target indication on the radar screen of... permission from the Captain of the Port (COTP), or his authorized representative. Vessel Traffic Service... grant revocable permits for the continuous use of the same berth. For the Anacortes General Anchorages...

  3. 46 CFR 15.710 - Working hours.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ..., prescribes certain rest periods, and prohibits unnecessary work on Sundays and certain holidays when the... can require any part of the crew to work when, in his or her judgment, they are needed for: (a) Maneuvering, shifting berth, mooring, unmooring; (b) Performing work necessary for the safety of the vessel...

  4. SFU rendezvous and SAP jettison

    NASA Image and Video Library

    1996-01-13

    STS072-720-076 (13 Jan. 1996) --- The crewmembers captured this 35mm view of the Japanese Space Flyer Unit (SFU) following the jettisoning of the solar panels. Later they used the Remote Manipulator System (RMS) to latch onto the satellite and berth it in the Space Shuttle Endeavour's aft cargo bay.

  5. Graph theoretical stable allocation as a tool for reproduction of control by human operators

    NASA Astrophysics Data System (ADS)

    van Nooijen, Ronald; Ertsen, Maurits; Kolechkina, Alla

    2016-04-01

    During the design of central control algorithms for existing water resource systems under manual control it is important to consider the interaction with parts of the system that remain under manual control and to compare the proposed new system with the existing manual methods. In graph theory the "stable allocation" problem has good solution algorithms and allows for formulation of flow distribution problems in terms of priorities. As a test case for the use of this approach we used the algorithm to derive water allocation rules for the Gezira Scheme, an irrigation system located between the Blue and White Niles south of Khartoum. In 1925, Gezira started with 300,000 acres; currently it covers close to two million acres.

  6. Optimal Power Allocation for Downstream xDSL With Per-Modem Total Power Constraints: Broadcast Channel Optimal Spectrum Balancing (BC-OSB)

    NASA Astrophysics Data System (ADS)

    Le Nir, Vincent; Moonen, Marc; Verlinden, Jan; Guenach, Mamoun

    2009-02-01

    Recently, the duality between Multiple Input Multiple Output (MIMO) Multiple Access Channels (MAC) and MIMO Broadcast Channels (BC) has been established under a total power constraint. The same set of rates for MAC can be achieved in BC exploiting the MAC-BC duality formulas while preserving the total power constraint. In this paper, we describe the BC optimal power allo- cation applying this duality in a downstream x-Digital Subscriber Lines (xDSL) context under a total power constraint for all modems over all tones. Then, a new algorithm called BC-Optimal Spectrum Balancing (BC-OSB) is devised for a more realistic power allocation under per-modem total power constraints. The capacity region of the primal BC problem under per-modem total power constraints is found by the dual optimization problem for the BC under per-modem total power constraints which can be rewritten as a dual optimization problem in the MAC by means of a precoder matrix based on the Lagrange multipliers. We show that the duality gap between the two problems is zero. The multi-user power allocation problem has been solved for interference channels and MAC using the OSB algorithm. In this paper we solve the problem of multi-user power allocation for the BC case using the OSB algorithm as well and we derive a computational efficient algorithm that will be referred to as BC-OSB. Simulation results are provided for two VDSL2 scenarios: the first one with Differential-Mode (DM) transmission only and the second one with both DM and Phantom- Mode (PM) transmissions.

  7. Land use allocation model considering climate change impact

    NASA Astrophysics Data System (ADS)

    Lee, D. K.; Yoon, E. J.; Song, Y. I.

    2017-12-01

    In Korea, climate change adaptation plans are being developed for each administrative district based on impact assessments constructed in various fields. This climate change impact assessments are superimposed on the actual space, which causes problems in land use allocation because the spatial distribution of individual impacts may be different each other. This implies that trade-offs between climate change impacts can occur depending on the composition of land use. Moreover, the actual space is complexly intertwined with various factors such as required area, legal regulations, and socioeconomic values, so land use allocation in consideration of climate change can be very difficult problem to solve (Liu et al. 2012; Porta et al. 2013).Optimization techniques can generate a sufficiently good alternatives for land use allocation at the strategic level if only the fitness function of relationship between impact and land use composition are derived. It has also been noted that land use optimization model is more effective than the scenario-based prediction model in achieving the objectives for problem solving (Zhang et al. 2014). Therefore in this study, we developed a quantitative tool, MOGA (Multi Objective Genetic Algorithm), which can generate a comprehensive land use allocations considering various climate change impacts, and apply it to the Gangwon-do in Korea. Genetic Algorithms (GAs) are the most popular optimization technique to address multi-objective in land use allocation. Also, it allows for immediate feedback to stake holders because it can run a number of experiments with different parameter values. And it is expected that land use decision makers and planners can formulate a detailed spatial plan or perform additional analysis based on the result of optimization model. Acknowledgments: This work was supported by the Korea Ministry of Environment (MOE) as "Climate Change Correspondence Program (Project number: 2014001310006)"

  8. The kidney allocation score: methodological problems, moral concerns and unintended consequences.

    PubMed

    Hippen, B

    2009-07-01

    The growing disparity between the demand for and supply of kidneys for transplantation has generated interest in alternative systems of allocating kidneys from deceased donors. This personal viewpoint focuses attention on the Kidney Allocation Score (KAS) proposal promulgated by the UNOS/OPTN Kidney Committee. I identify several methodological and moral flaws in the proposed system, concluding that any iteration of the KAS proposal should be met with more skepticism than sanguinity.

  9. Financial Resource Allocation in Higher Education

    ERIC Educational Resources Information Center

    Ušpuriene, Ana; Sakalauskas, Leonidas; Dumskis, Valerijonas

    2017-01-01

    The paper considers a problem of financial resource allocation in a higher education institution. The basic financial management instruments and the multi-stage cost minimization model created are described involving financial instruments to constraints. Both societal and institutional factors that determine the costs of educating students are…

  10. Interactive Land-Use Optimization Using Laguerre Voronoi Diagram with Dynamic Generating Point Allocation

    NASA Astrophysics Data System (ADS)

    Chaidee, S.; Pakawanwong, P.; Suppakitpaisarn, V.; Teerasawat, P.

    2017-09-01

    In this work, we devise an efficient method for the land-use optimization problem based on Laguerre Voronoi diagram. Previous Voronoi diagram-based methods are more efficient and more suitable for interactive design than discrete optimization-based method, but, in many cases, their outputs do not satisfy area constraints. To cope with the problem, we propose a force-directed graph drawing algorithm, which automatically allocates generating points of Voronoi diagram to appropriate positions. Then, we construct a Laguerre Voronoi diagram based on these generating points, use linear programs to adjust each cell, and reconstruct the diagram based on the adjustment. We adopt the proposed method to the practical case study of Chiang Mai University's allocated land for a mixed-use complex. For this case study, compared to other Voronoi diagram-based method, we decrease the land allocation error by 62.557 %. Although our computation time is larger than the previous Voronoi-diagram-based method, it is still suitable for interactive design.

  11. Statistical mechanics of competitive resource allocation using agent-based models

    NASA Astrophysics Data System (ADS)

    Chakraborti, Anirban; Challet, Damien; Chatterjee, Arnab; Marsili, Matteo; Zhang, Yi-Cheng; Chakrabarti, Bikas K.

    2015-01-01

    Demand outstrips available resources in most situations, which gives rise to competition, interaction and learning. In this article, we review a broad spectrum of multi-agent models of competition (El Farol Bar problem, Minority Game, Kolkata Paise Restaurant problem, Stable marriage problem, Parking space problem and others) and the methods used to understand them analytically. We emphasize the power of concepts and tools from statistical mechanics to understand and explain fully collective phenomena such as phase transitions and long memory, and the mapping between agent heterogeneity and physical disorder. As these methods can be applied to any large-scale model of competitive resource allocation made up of heterogeneous adaptive agent with non-linear interaction, they provide a prospective unifying paradigm for many scientific disciplines.

  12. Strategic planning for disaster recovery with stochastic last mile distribution

    DOE Office of Scientific and Technical Information (OSTI.GOV)

    Bent, Russell Whitford; Van Hentenryck, Pascal; Coffrin, Carleton

    2010-01-01

    This paper considers the single commodity allocation problem (SCAP) for disaster recovery, a fundamental problem faced by all populated areas. SCAPs are complex stochastic optimization problems that combine resource allocation, warehouse routing, and parallel fleet routing. Moreover, these problems must be solved under tight runtime constraints to be practical in real-world disaster situations. This paper formalizes the specification of SCAPs and introduces a novel multi-stage hybrid-optimization algorithm that utilizes the strengths of mixed integer programming, constraint programming, and large neighborhood search. The algorithm was validated on hurricane disaster scenarios generated by Los Alamos National Laboratory using state-of-the-art disaster simulation toolsmore » and is deployed to aid federal organizations in the US.« less

  13. Three-level global resource allocation model for hiv control: A hierarchical decision system approach.

    PubMed

    Kassa, Semu Mitiku

    2018-02-01

    Funds from various global organizations, such as, The Global Fund, The World Bank, etc. are not directly distributed to the targeted risk groups. Especially in the so-called third-world-countries, the major part of the fund in HIV prevention programs comes from these global funding organizations. The allocations of these funds usually pass through several levels of decision making bodies that have their own specific parameters to control and specific objectives to achieve. However, these decisions are made mostly in a heuristic manner and this may lead to a non-optimal allocation of the scarce resources. In this paper, a hierarchical mathematical optimization model is proposed to solve such a problem. Combining existing epidemiological models with the kind of interventions being on practice, a 3-level hierarchical decision making model in optimally allocating such resources has been developed and analyzed. When the impact of antiretroviral therapy (ART) is included in the model, it has been shown that the objective function of the lower level decision making structure is a non-convex minimization problem in the allocation variables even if all the production functions for the intervention programs are assumed to be linear.

  14. 46 CFR 32.40-45 - Lighting-T/ALL.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 46 Shipping 1 2010-10-01 2010-10-01 false Lighting-T/ALL. 32.40-45 Section 32.40-45 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY TANK VESSELS SPECIAL EQUIPMENT, MACHINERY, AND HULL REQUIREMENTS Accommodations for Officers and Crew § 32.40-45 Lighting—T/ALL. Each berth must have a light. ...

  15. 46 CFR 32.40-45 - Lighting-T/ALL.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 46 Shipping 1 2011-10-01 2011-10-01 false Lighting-T/ALL. 32.40-45 Section 32.40-45 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY TANK VESSELS SPECIAL EQUIPMENT, MACHINERY, AND HULL REQUIREMENTS Accommodations for Officers and Crew § 32.40-45 Lighting—T/ALL. Each berth must have a light. ...

  16. 29 CFR 1917.16 - Line handling. (See also § 1917.95(b)).

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... also § 1917.95(b)). (a) In order to provide safe access for handling lines while mooring and unmooring... be used. (b) When stringpiece or apron width is insufficient for safe footing, grab lines or rails... the water edge of a berth and a shed or other structure.) ...

  17. 29 CFR 1917.16 - Line handling. (See also § 1917.95(b)).

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... also § 1917.95(b)). (a) In order to provide safe access for handling lines while mooring and unmooring... be used. (b) When stringpiece or apron width is insufficient for safe footing, grab lines or rails... the water edge of a berth and a shed or other structure.) ...

  18. 14 CFR 23.785 - Seats, berths, litters, safety belts, and shoulder harnesses.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... combination of structural analysis and static load tests to limit load; or (3) Static load tests to ultimate... OF TRANSPORTATION AIRCRAFT AIRWORTHINESS STANDARDS: NORMAL, UTILITY, ACROBATIC, AND COMMUTER CATEGORY... resulting from the ultimate static load factors prescribed in § 23.561(b)(2) of this part. Each occupant...

  19. 14 CFR 23.785 - Seats, berths, litters, safety belts, and shoulder harnesses.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... combination of structural analysis and static load tests to limit load; or (3) Static load tests to ultimate... OF TRANSPORTATION AIRCRAFT AIRWORTHINESS STANDARDS: NORMAL, UTILITY, ACROBATIC, AND COMMUTER CATEGORY... resulting from the ultimate static load factors prescribed in § 23.561(b)(2) of this part. Each occupant...

  20. 14 CFR 23.785 - Seats, berths, litters, safety belts, and shoulder harnesses.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... combination of structural analysis and static load tests to limit load; or (3) Static load tests to ultimate... OF TRANSPORTATION AIRCRAFT AIRWORTHINESS STANDARDS: NORMAL, UTILITY, ACROBATIC, AND COMMUTER CATEGORY... resulting from the ultimate static load factors prescribed in § 23.561(b)(2) of this part. Each occupant...

  1. 14 CFR 23.785 - Seats, berths, litters, safety belts, and shoulder harnesses.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... combination of structural analysis and static load tests to limit load; or (3) Static load tests to ultimate... OF TRANSPORTATION AIRCRAFT AIRWORTHINESS STANDARDS: NORMAL, UTILITY, ACROBATIC, AND COMMUTER CATEGORY... resulting from the ultimate static load factors prescribed in § 23.561(b)(2) of this part. Each occupant...

  2. 14 CFR 23.785 - Seats, berths, litters, safety belts, and shoulder harnesses.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... combination of structural analysis and static load tests to limit load; or (3) Static load tests to ultimate... OF TRANSPORTATION AIRCRAFT AIRWORTHINESS STANDARDS: NORMAL, UTILITY, ACROBATIC, AND COMMUTER CATEGORY... resulting from the ultimate static load factors prescribed in § 23.561(b)(2) of this part. Each occupant...

  3. 76 FR 58227 - Passenger Vessel Operator Financial Responsibility Requirements for Nonperformance of Transportation

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-09-20

    ... through its Ombudsman Service. The CADRS staff is trained to serve as third-party neutrals in a..., services and facilities relating thereto not yet performed. 46 CFR 540.2(i). 3. Customer will deposit on... shall arrange, offer, advertise, or provide passage on a vessel having berth or stateroom accommodations...

  4. 14 CFR 27.785 - Seats, berths, litters, safety belts, and harnesses.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ....561(b) and dynamic conditions specified in § 27.562. (b) Each occupant must be protected from serious... combination with the safety belt, constitutes a torso restraint system as described in TSO-C114. (c) Each... weight of at least 170 pounds, considering the dimensional characteristics of the restraint system...

  5. 14 CFR 29.785 - Seats, berths, litters, safety belts, and harnesses.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... dynamic conditions specified in § 29.562. (b) Each occupant must be protected from serious head injury by... combination with the safety belt, constitutes a torso restraint system as described in TSO-C114. (c) Each... weight of at least 170 pounds, considering the dimensional characteristics of the restraint system...

  6. The 25 kW power module evolution study. Part 3: Conceptual designs for power module evolution. Volume 4: Design analyses

    NASA Technical Reports Server (NTRS)

    1979-01-01

    Topics covered include growth options evaluation, mass properties, attitude control and structural dynamics, contamination evaluation, berthing concepts, orbit reboost options and growth kit concepts. Systems support elements and space support equipment are reviewed with emphasis on power module operations and technology planning.

  7. Nowak reads a checklist during OBSS berthing operations on STS-121

    NASA Image and Video Library

    2006-07-05

    S121-E-05401 (5 July 2006) --- Astronaut Lisa M. Nowak, STS-121 mission specialist, uses a handy reference manual while stationed at the controls on the aft flight deck of the Space Shuttle Discovery. She is preparing for the next day's activities which include docking with the International Space Station.

  8. Nowak reads a checklist during OBSS berthing operations on STS-121

    NASA Image and Video Library

    2006-07-05

    S121-E-05402 (5 July 2006) --- Astronaut Lisa M. Nowak, STS-121 mission specialist, uses a handy reference manual while stationed at the controls on the aft flight deck of the Space Shuttle Discovery. She is preparing for the next day's activities which include docking with the International Space Station.

  9. 33 CFR 83.34 - Maneuvering and warning signals (Rule 34).

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... 33 Navigation and Navigable Waters 1 2012-07-01 2012-07-01 false Maneuvering and warning signals... SECURITY INLAND NAVIGATION RULES RULES Sound and Light Signals § 83.34 Maneuvering and warning signals... maneuvering and warning signals. (g) Power-driven vessels leaving dock or berth. When a power-driven vessel is...

  10. 33 CFR 83.34 - Maneuvering and warning signals (Rule 34).

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 33 Navigation and Navigable Waters 1 2010-07-01 2010-07-01 false Maneuvering and warning signals... SECURITY INLAND NAVIGATION RULES RULES Sound and Light Signals § 83.34 Maneuvering and warning signals... maneuvering and warning signals. (g) Power-driven vessels leaving dock or berth. When a power-driven vessel is...

  11. 33 CFR 144.20-5 - Exposure suits.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... readily accessible location in or near the berthing area of the person for whom the exposure suit is... stowed in that location) is readily accessible to the station. (c) Each exposure suit on a MODU must be... type or multi-tone type, of corrosion resistant construction, and in good working order. The whistle...

  12. Japanese Space Flyer Unit (SFU) satellite rendezvous

    NASA Image and Video Library

    1996-01-20

    STS072-720-042 (13 Jan. 1996) --- The crew members captured this 70mm view of the Japanese Space Flyer Unit (SFU) just prior to the jettisoning of the solar panels. Later, they used the Remote Manipulator System (RMS) to latch onto the satellite and berth it in the Space Shuttle Endeavour’s aft cargo bay.

  13. A Novel Joint Problem of Routing, Scheduling, and Variable-Width Channel Allocation in WMNs

    PubMed Central

    Liu, Wan-Yu; Chou, Chun-Hung

    2014-01-01

    This paper investigates a novel joint problem of routing, scheduling, and channel allocation for single-radio multichannel wireless mesh networks in which multiple channel widths can be adjusted dynamically through a new software technology so that more concurrent transmissions and suppressed overlapping channel interference can be achieved. Although the previous works have studied this joint problem, their linear programming models for the problem were not incorporated with some delicate constraints. As a result, this paper first constructs a linear programming model with more practical concerns and then proposes a simulated annealing approach with a novel encoding mechanism, in which the configurations of multiple time slots are devised to characterize the dynamic transmission process. Experimental results show that our approach can find the same or similar solutions as the optimal solutions for smaller-scale problems and can efficiently find good-quality solutions for a variety of larger-scale problems. PMID:24982990

  14. Development of the dynamic motion simulator of 3D micro-gravity with a combined passive/active suspension system

    NASA Technical Reports Server (NTRS)

    Yoshida, Kazuya; Hirose, Shigeo; Ogawa, Tadashi

    1994-01-01

    The establishment of those in-orbit operations like 'Rendez-Vous/Docking' and 'Manipulator Berthing' with the assistance of robotics or autonomous control technology, is essential for the near future space programs. In order to study the control methods, develop the flight models, and verify how the system works, we need a tool or a testbed which enables us to simulate mechanically the micro-gravity environment. There have been many attempts to develop the micro-gravity testbeds, but once the simulation goes into the docking and berthing operation that involves mechanical contacts among multi bodies, the requirement becomes critical. A group at the Tokyo Institute of Technology has proposed a method that can simulate the 3D micro-gravity producing a smooth response to the impact phenomena with relatively simple apparatus. Recently the group carried out basic experiments successfully using a prototype hardware model of the testbed. This paper will present our idea of the 3D micro-gravity simulator and report the results of our initial experiments.

  15. Endeavour's payload bay with the Raphaello module and Canadarm 2

    NASA Image and Video Library

    2001-04-20

    S100-E-5015 (20 April 2001) --- One of the crew members of STS-100 aimed a digital still camera through Endeavour's aft flight deck windows to record this image of the cargo bay, backdropped against a scene of black space and Earth's horizon. Housed in the bay, beyond the docking mechanism in the foreground, is the Italian Space Agency-provided Raffaello cargo module, which is carrying several tons of equipment for the Expedition Two crew and racks of hardware for installation in Destiny which will be used for scientific research in the future. Raffaello, which is the second of three such logistics modules, will be berthed to the ISS on April 23 so its contents can be transferred to the station throughout the course of docked operations. Also in the bay is the 57-foot-long Canadarm2, which will be mounted on the Destiny Laboratory for future station assembly work. Endeavour's Canadian-built Remote Manipulator System (RMS) arm can be seen in its berthed position on the port side of the payload bay.

  16. Endeavour's payload bay with the Raphaello module and Canadarm 2

    NASA Image and Video Library

    2001-04-20

    S100-E-5018 (20 April 2001) --- One of the crew members of STS-100 aimed a digital still camera through Endeavour's aft flight deck windows to record this image of the cargo bay, backdropped against a scene of black space and Earth's horizon. Housed in the bay, beyond the docking mechanism in the foreground, is the Italian Space Agency-provided Raffaello cargo module, which is carrying several tons of equipment for the Expedition Two crew and racks of hardware for installation in Destiny which will be used for scientific research in the future. Raffaello, which is the second of three such logistics modules, will be berthed to the ISS on April 23 so its contents can be transferred to the station throughout the course of docked operations. Also in the bay is the 57-foot-long Canadarm2, which will be mounted on the Destiny Laboratory for future station assembly work. Endeavour's Canadian-built Remote Manipulator System (RMS) arm can be seen in its berthed position on the port side of the payload bay.

  17. Endeavour's payload bay with the Raphaello module and Canadarm 2

    NASA Image and Video Library

    2001-04-20

    S100-E-5002 (20 April 2001) --- One of the crew members of STS-100 aimed a digital still camera through Endeavour's aft flight deck windows to record this image of the cargo bay, backdropped against a scene of black space and Earth's horizon. Housed in the bay, beyond the docking mechanism in the foreground, is the Italian Space Agency-provided Raffaello cargo module, which is carrying several tons of equipment for the Expedition Two crew and racks of hardware for installation in Destiny which will be used for scientific research in the future. Raffaello, which is the second of three such logistics modules, will be berthed to the ISS on April 23 so its contents can be transferred to the station throughout the course of docked operations. Also in the bay is the 57-foot-long Canadarm2, which will be mounted on the Destiny Laboratory for future station assembly work. Endeavour's Canadian-built Remote Manipulator System (RMS) arm can be seen in its berthed position on the port side of the payload bay.

  18. Endeavour's payload bay with the Raphaello module and Canadarm 2

    NASA Image and Video Library

    2001-04-20

    S100-E-5017 (20 April 2001) --- One of the crew members of STS-100 aimed a digital still camera through Endeavour's aft flight deck windows to record this image of the cargo bay, backdropped against a scene of black space and Earth's horizon. Housed in the bay, beyond the docking mechanism in the foreground, is the Italian Space Agency-provided Raffaello cargo module, which is carrying several tons of equipment for the Expedition Two crew and racks of hardware for installation in Destiny which will be used for scientific research in the future. Raffaello, which is the second of three such logistics modules, will be berthed to the ISS on April 23 so its contents can be transferred to the station throughout the course of docked operations. Also in the bay is the 57-foot-long Canadarm2, which will be mounted on the Destiny Laboratory for future station assembly work. Endeavour's Canadian-built Remote Manipulator System (RMS) arm can be seen in its berthed position on the port side of the payload bay.

  19. Distributed cooperating processes in a mobile robot control system

    NASA Technical Reports Server (NTRS)

    Skillman, Thomas L., Jr.

    1988-01-01

    A mobile inspection robot has been proposed for the NASA Space Station. It will be a free flying autonomous vehicle that will leave a berthing unit to accomplish a variety of inspection tasks around the Space Station, and then return to its berth to recharge, refuel, and transfer information. The Flying Eye robot will receive voice communication to change its attitude, move at a constant velocity, and move to a predefined location along a self generated path. This mobile robot control system requires integration of traditional command and control techniques with a number of AI technologies. Speech recognition, natural language understanding, task and path planning, sensory abstraction and pattern recognition are all required for successful implementation. The interface between the traditional numeric control techniques and the symbolic processing to the AI technologies must be developed, and a distributed computing approach will be needed to meet the real time computing requirements. To study the integration of the elements of this project, a novel mobile robot control architecture and simulation based on the blackboard architecture was developed. The control system operation and structure is discussed.

  20. Approaches to Resource Allocation

    ERIC Educational Resources Information Center

    Dressel, Paul; Simon, Lou Anna Kimsey

    1976-01-01

    Various budgeting patterns and strategies are currently in use, each with its own particular strengths and weaknesses. Neither cost-benefit analysis nor cost-effectiveness analysis offers any better solution to the allocation problem than do the unsupported contentions of departments or the historical unit costs. An operable model that performs…

  1. The misnomer of attention-deficit hyperactivity disorder.

    PubMed

    Wasserman, Theodore; Wasserman, Lori Drucker

    2015-01-01

    We propose that attention-deficit disorder represents an inefficiency of an integrated system designed to allocate working memory to designated tasks rather than the absence or dysfunction of a particular form of attention. A significant portion of this inefficiency in the allocation of working memory represents poor engagement of the reward circuit with distinct circuits of learning and performance that control instrumental conditioning (learning). Efficient attention requires the interaction of these circuits. For a significant percentage of individuals who present with attention-deficit disorder, their problems represent the engagement, or lack thereof, of the motivational and reward circuit as opposed to problems, or disorders of attention traditionally defined as problems with orienting, focusing, and sustaining. We demonstrate that there is an integrated system of working-memory allocation that responds by recruiting relevant aspects of both cortex and subcortex to the demands of the task being encountered. In this model, attention is viewed as a gating function determined by novelty, flight-or-fight response, and reward history/valence affecting motivation. We view the traditional models of attention, rather than describe specific types of attention per se, as representing the description of the behavioral output of this integrated orienting and engagement system designed to allocate working memory to task-specific stimuli.

  2. Optimal Computing Budget Allocation for Particle Swarm Optimization in Stochastic Optimization.

    PubMed

    Zhang, Si; Xu, Jie; Lee, Loo Hay; Chew, Ek Peng; Wong, Wai Peng; Chen, Chun-Hung

    2017-04-01

    Particle Swarm Optimization (PSO) is a popular metaheuristic for deterministic optimization. Originated in the interpretations of the movement of individuals in a bird flock or fish school, PSO introduces the concept of personal best and global best to simulate the pattern of searching for food by flocking and successfully translate the natural phenomena to the optimization of complex functions. Many real-life applications of PSO cope with stochastic problems. To solve a stochastic problem using PSO, a straightforward approach is to equally allocate computational effort among all particles and obtain the same number of samples of fitness values. This is not an efficient use of computational budget and leaves considerable room for improvement. This paper proposes a seamless integration of the concept of optimal computing budget allocation (OCBA) into PSO to improve the computational efficiency of PSO for stochastic optimization problems. We derive an asymptotically optimal allocation rule to intelligently determine the number of samples for all particles such that the PSO algorithm can efficiently select the personal best and global best when there is stochastic estimation noise in fitness values. We also propose an easy-to-implement sequential procedure. Numerical tests show that our new approach can obtain much better results using the same amount of computational effort.

  3. A generalized fuzzy credibility-constrained linear fractional programming approach for optimal irrigation water allocation under uncertainty

    NASA Astrophysics Data System (ADS)

    Zhang, Chenglong; Guo, Ping

    2017-10-01

    The vague and fuzzy parametric information is a challenging issue in irrigation water management problems. In response to this problem, a generalized fuzzy credibility-constrained linear fractional programming (GFCCFP) model is developed for optimal irrigation water allocation under uncertainty. The model can be derived from integrating generalized fuzzy credibility-constrained programming (GFCCP) into a linear fractional programming (LFP) optimization framework. Therefore, it can solve ratio optimization problems associated with fuzzy parameters, and examine the variation of results under different credibility levels and weight coefficients of possibility and necessary. It has advantages in: (1) balancing the economic and resources objectives directly; (2) analyzing system efficiency; (3) generating more flexible decision solutions by giving different credibility levels and weight coefficients of possibility and (4) supporting in-depth analysis of the interrelationships among system efficiency, credibility level and weight coefficient. The model is applied to a case study of irrigation water allocation in the middle reaches of Heihe River Basin, northwest China. Therefore, optimal irrigation water allocation solutions from the GFCCFP model can be obtained. Moreover, factorial analysis on the two parameters (i.e. λ and γ) indicates that the weight coefficient is a main factor compared with credibility level for system efficiency. These results can be effective for support reasonable irrigation water resources management and agricultural production.

  4. Optimal Computing Budget Allocation for Particle Swarm Optimization in Stochastic Optimization

    PubMed Central

    Zhang, Si; Xu, Jie; Lee, Loo Hay; Chew, Ek Peng; Chen, Chun-Hung

    2017-01-01

    Particle Swarm Optimization (PSO) is a popular metaheuristic for deterministic optimization. Originated in the interpretations of the movement of individuals in a bird flock or fish school, PSO introduces the concept of personal best and global best to simulate the pattern of searching for food by flocking and successfully translate the natural phenomena to the optimization of complex functions. Many real-life applications of PSO cope with stochastic problems. To solve a stochastic problem using PSO, a straightforward approach is to equally allocate computational effort among all particles and obtain the same number of samples of fitness values. This is not an efficient use of computational budget and leaves considerable room for improvement. This paper proposes a seamless integration of the concept of optimal computing budget allocation (OCBA) into PSO to improve the computational efficiency of PSO for stochastic optimization problems. We derive an asymptotically optimal allocation rule to intelligently determine the number of samples for all particles such that the PSO algorithm can efficiently select the personal best and global best when there is stochastic estimation noise in fitness values. We also propose an easy-to-implement sequential procedure. Numerical tests show that our new approach can obtain much better results using the same amount of computational effort. PMID:29170617

  5. Dynamic task allocation for a man-machine symbiotic system

    NASA Technical Reports Server (NTRS)

    Parker, L. E.; Pin, F. G.

    1987-01-01

    This report presents a methodological approach to the dynamic allocation of tasks in a man-machine symbiotic system in the context of dexterous manipulation and teleoperation. This report addresses a symbiotic system containing two symbiotic partners which work toward controlling a single manipulator arm for the execution of a series of sequential manipulation tasks. It is proposed that an automated task allocator use knowledge about the constraints/criteria of the problem, the available resources, the tasks to be performed, and the environment to dynamically allocate task recommendations for the man and the machine. The presentation of the methodology includes discussions concerning the interaction of the knowledge areas, the flow of control, the necessary communication links, and the replanning of the task allocation. Examples of task allocation are presented to illustrate the results of this methodolgy.

  6. Optimal resource allocation for defense of targets based on differing measures of attractiveness.

    PubMed

    Bier, Vicki M; Haphuriwat, Naraphorn; Menoyo, Jaime; Zimmerman, Rae; Culpen, Alison M

    2008-06-01

    This article describes the results of applying a rigorous computational model to the problem of the optimal defensive resource allocation among potential terrorist targets. In particular, our study explores how the optimal budget allocation depends on the cost effectiveness of security investments, the defender's valuations of the various targets, and the extent of the defender's uncertainty about the attacker's target valuations. We use expected property damage, expected fatalities, and two metrics of critical infrastructure (airports and bridges) as our measures of target attractiveness. Our results show that the cost effectiveness of security investment has a large impact on the optimal budget allocation. Also, different measures of target attractiveness yield different optimal budget allocations, emphasizing the importance of developing more realistic terrorist objective functions for use in budget allocation decisions for homeland security.

  7. Optimum Allocation of Water to the Cultivation Farms Using Genetic Algorithm

    NASA Astrophysics Data System (ADS)

    Saeidian, B.; Saadi Mesgari, M.; Ghodousi, M.

    2015-12-01

    The water scarcity crises in the world and specifically in Iran, requires the proper management of this valuable resource. According to the official reports, around 90 percent of the water in Iran is used for agriculture. Therefore, the adequate management and usage of water in this section can help significantly to overcome the above crises. The most important aspect of agricultural water management is related to the irrigation planning, which is basically an allocation problem. The proper allocation of water to the farms is not a simple and trivial problem, because of the limited amount of available water, the effect of different parameters, nonlinear characteristics of the objective function, and the wideness of the solution space. Usually To solve such complex problems, a meta-heuristic method such as genetic algorithm could be a good candidate. In this paper, Genetic Algorithm (GA) is used for the allocation of different amount of water to a number of farms. In this model, the amount of water transferable using canals of level one, in one period of irrigation is specified. In addition, the amount of water required by each farm is calculated using crop type, stage of crop development, and other parameters. Using these, the water production function of each farm is determined. Then, using the water production function, farm areas, and the revenue and cost of each crop type, the objective function is calculated. This objective function is used by GA for the allocation of water to the farms. The objective function is defined such that the economical profit extracted from all farms is maximized. Moreover, the limitation related to the amount of available water is considered as a constraint. In general, the total amount of allocated water should be less than the finally available water (the water transferred trough the level one canals). Because of the intensive scarcity of water, the deficit irrigation method are considered. In this method, the planning is on the basis of the optimum and limited allocation of water, and not on the basis of the each crop water requirement. According to the available literature, in the condition of water scarcity, the implementation of deficit irrigation strategy results in higher economical income. The main difference of this research with others is the allocation of water to the farms. Whilst, most of similar researches concentrate on the allocation of water to different water consumption sections (such as agriculture, industry etc.), networks and crops. Using the GA for the optimization of the water allocation, proper solutions were generated that maximize the total economical income in the entire study area. In addition, although the search space was considerably wide, the results of the implementation showed an adequate convergence speed. The repeatability test of the algorithm also proved that the algorithm is reasonably stable. In general the usage of GA algorithm can be considered as an efficient and trustable method for such irrigation planning problems. By optimum allocation of the water to the farms with different areas and crop types, and considering the deficit irrigation method, the general income of the entire area can be improved substantially.

  8. International Standardization in the Design of "Shore to Ship" - Power Supply Systems of Ships in Port

    NASA Astrophysics Data System (ADS)

    Tarnapowicz, Dariusz; German-Galkin, Sergiej

    2018-03-01

    The decisive source of air pollution emissions in ports is the berthed ships. This is primarily caused by the work of ship's autonomous generator sets. One way of reducing the air pollution emissions in ports is the supply of ships from electricity inland system. The main problem connected with the power connection of ships to the inland network is caused by different values of levels and frequencies of voltages in these networks (in various countries) in relation to different values of levels and frequencies of voltages present in the ship's network. It is also important that the source power can range from a few hundred kW up to several MW. In order to realize a universal „Shore to Ship" system that allows the connection of ships to the electricity inland network, the international standardization is necessary. This article presents the current recommendations, standards and regulations for the design of „Shore to Ship" systems.

  9. An intelligent allocation algorithm for parallel processing

    NASA Technical Reports Server (NTRS)

    Carroll, Chester C.; Homaifar, Abdollah; Ananthram, Kishan G.

    1988-01-01

    The problem of allocating nodes of a program graph to processors in a parallel processing architecture is considered. The algorithm is based on critical path analysis, some allocation heuristics, and the execution granularity of nodes in a program graph. These factors, and the structure of interprocessor communication network, influence the allocation. To achieve realistic estimations of the executive durations of allocations, the algorithm considers the fact that nodes in a program graph have to communicate through varying numbers of tokens. Coarse and fine granularities have been implemented, with interprocessor token-communication duration, varying from zero up to values comparable to the execution durations of individual nodes. The effect on allocation of communication network structures is demonstrated by performing allocations for crossbar (non-blocking) and star (blocking) networks. The algorithm assumes the availability of as many processors as it needs for the optimal allocation of any program graph. Hence, the focus of allocation has been on varying token-communication durations rather than varying the number of processors. The algorithm always utilizes as many processors as necessary for the optimal allocation of any program graph, depending upon granularity and characteristics of the interprocessor communication network.

  10. General form of a cooperative gradual maximal covering location problem

    NASA Astrophysics Data System (ADS)

    Bagherinejad, Jafar; Bashiri, Mahdi; Nikzad, Hamideh

    2018-07-01

    Cooperative and gradual covering are two new methods for developing covering location models. In this paper, a cooperative maximal covering location-allocation model is developed (CMCLAP). In addition, both cooperative and gradual covering concepts are applied to the maximal covering location simultaneously (CGMCLP). Then, we develop an integrated form of a cooperative gradual maximal covering location problem, which is called a general CGMCLP. By setting the model parameters, the proposed general model can easily be transformed into other existing models, facilitating general comparisons. The proposed models are developed without allocation for physical signals and with allocation for non-physical signals in discrete location space. Comparison of the previously introduced gradual maximal covering location problem (GMCLP) and cooperative maximal covering location problem (CMCLP) models with our proposed CGMCLP model in similar data sets shows that the proposed model can cover more demands and acts more efficiently. Sensitivity analyses are performed to show the effect of related parameters and the model's validity. Simulated annealing (SA) and a tabu search (TS) are proposed as solution algorithms for the developed models for large-sized instances. The results show that the proposed algorithms are efficient solution approaches, considering solution quality and running time.

  11. On-Line Allocation Of Robot Resources To Task Plans

    NASA Astrophysics Data System (ADS)

    Lyons, Damian M.

    1989-02-01

    In this paper, I present an approach to representing plans that make on-line decisions about resource allocation. An on-line decision is the evaluation of a conditional expression involving sensory information as the plan is being executed. I use a plan representation called 7ZS10'1 1,12that has been especially designed for the domain of robot programming, and in particular, for the problem of on-line decisions. The resource allocation example is based on the robot assembly cell architecture outlined by Venkataraman and Lyons16. I begin by setting forth a definition of on-line decision making and some arguments as to why this form of decision making is important and useful. To set the context for the resource allocation example, I take some care in categorizing the types of on-line decision making and the approaches adopted by other workers so far. In particular, I justify a plan-based approach to the study of on-line decision making. From that, the focus shifts to one type of decision making: on-line allocation of robot resources to task plans. Robot resources are the physical manipulators (grippers, wrists, arms, feeders, etc) that are available to carry out the task. I formulate the assembly cell architecture of Venkataraman and Lyons16 as an R.S plan schema, and show how the on-line allocation specified in that architecture can be implemented. Finally, I show how considering the on-line allocation of logical resources, that is a physical resource plus some model information, can be used as a non-traditional approach to some problems in robot task planning.

  12. Alternative mathematical programming formulations for FSS synthesis

    NASA Technical Reports Server (NTRS)

    Reilly, C. H.; Mount-Campbell, C. A.; Gonsalvez, D. J. A.; Levis, C. A.

    1986-01-01

    A variety of mathematical programming models and two solution strategies are suggested for the problem of allocating orbital positions to (synthesizing) satellites in the Fixed Satellite Service. Mixed integer programming and almost linear programming formulations are presented in detail for each of two objectives: (1) positioning satellites as closely as possible to specified desired locations, and (2) minimizing the total length of the geostationary arc allocated to the satellites whose positions are to be determined. Computational results for mixed integer and almost linear programming models, with the objective of positioning satellites as closely as possible to their desired locations, are reported for three six-administration test problems and a thirteen-administration test problem.

  13. A centre-free approach for resource allocation with lower bounds

    NASA Astrophysics Data System (ADS)

    Obando, Germán; Quijano, Nicanor; Rakoto-Ravalontsalama, Naly

    2017-09-01

    Since complexity and scale of systems are continuously increasing, there is a growing interest in developing distributed algorithms that are capable to address information constraints, specially for solving optimisation and decision-making problems. In this paper, we propose a novel method to solve distributed resource allocation problems that include lower bound constraints. The optimisation process is carried out by a set of agents that use a communication network to coordinate their decisions. Convergence and optimality of the method are guaranteed under some mild assumptions related to the convexity of the problem and the connectivity of the underlying graph. Finally, we compare our approach with other techniques reported in the literature, and we present some engineering applications.

  14. Social problem-solving plus psychoeducation for adults with personality disorder: pragmatic randomised controlled trial.

    PubMed

    Huband, Nick; McMurran, Mary; Evans, Chris; Duggan, Conor

    2007-04-01

    Social problem-solving therapy may be relevant in the treatment of personality disorder, although assessments of its effectiveness are uncommon. To determine the effectiveness of a problem-solving intervention for adults with personality disorder in the community under conditions resembling routine clinical practice. Participants were randomly allocated to brief psychoeducation plus 16 problem-solving group sessions (n=87) or to waiting-list control (n=89). Primary outcome was comparison of scores on the Social Problem Solving Inventory and the Social Functioning Questionnaire between intervention and control arms at the conclusion of treatment, on average at 24 weeks after randomisation. In intention-to-treat analysis, those allocated to intervention showed significantly better problem-solving skills (P<0.001), higher overall social functioning (P=0.031) and lower anger expression (P=0.039) compared with controls. No significant differences were found on use of services during the intervention period. Problem-solving plus psychoeducation has potential as a preliminary intervention for adults with personality disorder.

  15. Problems, Perplexities, and Politics of Program Evaluation.

    ERIC Educational Resources Information Center

    Schneider, Gail Thierbach

    All educational evaluations share common problems, perplexities, and political considerations. Logistic problems include incomplete definition of purpose, unclear timelines and personnel allocations, inadequate support services, and the lack of a program plan. Interpersonal dynamics and conflicts plus unwieldy committee structures are perplexities…

  16. Playing Games with Optimal Competitive Scheduling

    NASA Technical Reports Server (NTRS)

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

    2005-01-01

    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, selfish 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.

  17. Solving the optimal attention allocation problem in manual control

    NASA Technical Reports Server (NTRS)

    Kleinman, D. L.

    1976-01-01

    Within the context of the optimal control model of human response, analytic expressions for the gradients of closed-loop performance metrics with respect to human operator attention allocation are derived. These derivatives serve as the basis for a gradient algorithm that determines the optimal attention that a human should allocate among several display indicators in a steady-state manual control task. Application of the human modeling techniques are made to study the hover control task for a CH-46 VTOL flight tested by NASA.

  18. Annual Review of Progress in Applied Computational Electromagnetics (6th), Held in Monterey, California on March 19-22, 1990

    DTIC Science & Technology

    1990-01-01

    the six fields will have two million cell locations. The table below shows the total allocation of 392 chips across fields and banks. To allow for...future growth, we allocate 16 wires for addressing both the rows and columns. eU 4 MBit locations bytes bits Chips (millions) (millions) (millions) per...sources apt to appear in most problems. If material parameters change during a run, then time must be allocated to read these constants into their

  19. Optimality versus stability in water resource allocation.

    PubMed

    Read, Laura; Madani, Kaveh; Inanloo, Bahareh

    2014-01-15

    Water allocation is a growing concern in a developing world where limited resources like fresh water are in greater demand by more parties. Negotiations over allocations often involve multiple groups with disparate social, economic, and political status and needs, who are seeking a management solution for a wide range of demands. Optimization techniques for identifying the Pareto-optimal (social planner solution) to multi-criteria multi-participant problems are commonly implemented, although often reaching agreement for this solution is difficult. In negotiations with multiple-decision makers, parties who base decisions on individual rationality may find the social planner solution to be unfair, thus creating a need to evaluate the willingness to cooperate and practicality of a cooperative allocation solution, i.e., the solution's stability. This paper suggests seeking solutions for multi-participant resource allocation problems through an economics-based power index allocation method. This method can inform on allocation schemes that quantify a party's willingness to participate in a negotiation rather than opt for no agreement. Through comparison of the suggested method with a range of distance-based multi-criteria decision making rules, namely, least squares, MAXIMIN, MINIMAX, and compromise programming, this paper shows that optimality and stability can produce different allocation solutions. The mismatch between the socially-optimal alternative and the most stable alternative can potentially result in parties leaving the negotiation as they may be too dissatisfied with their resource share. This finding has important policy implications as it justifies why stakeholders may not accept the socially optimal solution in practice, and underlies the necessity of considering stability where it may be more appropriate to give up an unstable Pareto-optimal solution for an inferior stable one. Authors suggest assessing the stability of an allocation solution as an additional component to an analysis that seeks to distribute water in a negotiated process. Copyright © 2013 Elsevier Ltd. All rights reserved.

  20. 77 FR 61746 - Notice of Intent To Prepare a Supplemental Environmental Impact Statement for the Guam and...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-10-11

    ... Aircraft Carrier Berthing, and Army Air and Missile Defense Task Force'' dated July 2010. Pursuant to 40... day care), some site-specific training, and open space (e.g., parade grounds, open training areas, and open green space in communities). The proposed action also includes the utilities and infrastructure...

  1. Comparisons of Men and Women at the U.S. Naval Academy: Outcomes and Processes in Their Development.

    ERIC Educational Resources Information Center

    Harrison, Patrick R.; Leadbetter, Beth

    The integration of women into the U.S. Naval Academy is analyzed. Areas of concern identified before the arrival of women in the class of 1980 were fraternization, acceptance, physical conditioning, berthing, leading and counseling females, publicity, athletic outlets, extra-curricular involvement, summer cruises, weight and diet requirements, and…

  2. Metallic Seal Development for Advanced Docking/Berthing System

    NASA Technical Reports Server (NTRS)

    Oswald, Jay; Daniels, Christopher; Dunlap, Patrick, Jr.; Steinetz, Bruce

    2006-01-01

    Feasibility of metal-to-metal androgenous seals has been demonstrated. Techniques to minimize surface irregularities must be examined. Two concepts investigated: 1) Flexible metal interface with elastomeric preloader; 2) Flexibility will accommodate any surface irregularities from the mating surface. Rigid metal interface with elastomeric preloader. Rigidity of the metal surface will prevent irregularities (waves) from occurring.

  3. 46 CFR 92.20-20 - Sleeping accommodations.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... must be of such size that there is at least 2.78 square meters (30 square feet) of deck area and a volume of at least 5.8 cubic meters (210 cubic feet) for each person accommodated. The clear head room... placed above another. The berth must be composed of materials not likely to corrode. The overall size of...

  4. 46 CFR 92.20-20 - Sleeping accommodations.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... must be of such size that there is at least 2.78 square meters (30 square feet) of deck area and a volume of at least 5.8 cubic meters (210 cubic feet) for each person accommodated. The clear head room... placed above another. The berth must be composed of materials not likely to corrode. The overall size of...

  5. NWEI Azura September 2016 Data

    DOE Data Explorer

    Terry Lettenmaier

    2016-10-15

    Data files for the NWEI Azura grid-connected deployment at the 30-meter berth of the US Navys Wave Energy Test Site (WETS 30m Site) at the Kaneohe Marine Corps Base Hawaii (MCBH) on the windward (northeast) coast of the island of Oahu, HI. See general documentation describing specifics of the data files and formats in a separate submission.

  6. NWEI Azura May 2016 Data

    DOE Data Explorer

    Terry Lettenmaier

    2016-06-07

    Data files for the NWEI Azura grid-connected deployment at the 30-meter berth of the US Navy's Wave Energy Test Site (WETS 30m Site) at the Kaneohe Marine Corps Base Hawaii (MCBH) on the windward (northeast) coast of the island of Oahu, HI. See general documentation describing specifics of the data files and formats in a separate submission.

  7. NWEI Azura October 2016 Data

    DOE Data Explorer

    Terry Lettenmaier

    2016-11-11

    Data files for the NWEI Azura grid-connected deployment at the 30-meter berth of the US Navys Wave Energy Test Site (WETS 30m Site) at the Kaneohe Marine Corps Base Hawaii (MCBH) on the windward (northeast) coast of the island of Oahu, HI. See general documentation describing specifics of the data files and formats in a separate submission.

  8. NWEI Azura July 2016 Data

    DOE Data Explorer

    Terry Lettenmaier

    2016-08-31

    Data files for the NWEI Azura grid-connected deployment at the 30-meter berth of the US Navys Wave Energy Test Site (WETS 30m Site) at the Kaneohe Marine Corps Base Hawaii (MCBH) on the windward (northeast) coast of the island of Oahu, HI. See general documentation describing specifics of the data files and formats in a separate submission.

  9. NWEI Azura August 2016 Data

    DOE Data Explorer

    Terry Lettenmaier

    2016-10-14

    Data files for the NWEI Azura grid-connected deployment at the 30-meter berth of the US Navys Wave Energy Test Site (WETS 30m Site) at the Kaneohe Marine Corps Base Hawaii (MCBH) on the windward (northeast) coast of the island of Oahu, HI. See general documentation describing specifics of the data files and formats in a separate submission.

  10. NWEI Azura February 2016 Data

    DOE Data Explorer

    Terry Lettenmaier

    2016-03-07

    Data files for the NWEI Azura grid-connected deployment at the 30-meter berth of the US Navy's Wave Energy Test Site (WETS 30m Site) at the Kaneohe Marine Corps Base Hawai'i (MCBH) on the windward (northeast) coast of the island of Oahu, HI. See general documentation describing specifics of the data files and formats in a separate submission.

  11. NWEI Azura March 2016 Data

    DOE Data Explorer

    Terry Lettenmaier

    2016-03-31

    Data files for the NWEI Azura grid-connected deployment at the 30-meter berth of the US Navy's Wave Energy Test Site (WETS 30m Site) at the Kaneohe Marine Corps Base Hawaii (MCBH) on the windward (northeast) coast of the island of Oahu, HI. See general documentation describing specifics of the data files and formats in a separate submission.

  12. NWEI Azura June 2016 Data

    DOE Data Explorer

    Terry Lettenmaier

    2016-08-31

    Data files for the NWEI Azura grid-connected deployment at the 30-meter berth of the US Navys Wave Energy Test Site (WETS 30m Site) at the Kaneohe Marine Corps Base Hawaii (MCBH) on the windward (northeast) coast of the island of Oahu, HI. See general documentation describing specifics of the data files and formats in a separate submission.

  13. NWEI Azura April 2016 Data

    DOE Data Explorer

    Terry Lettenmaier

    2016-06-08

    Data files for the NWEI Azura grid-connected deployment at the 30-meter berth of the US Navy's Wave Energy Test Site (WETS 30m Site) at the Kaneohe Marine Corps Base Hawaii (MCBH) on the windward (northeast) coast of the island of Oahu, HI. See general documentation describing specifics of the data files and formats in a separate submission.

  14. NWEI Azura November 2016 Data

    DOE Data Explorer

    Terry Lettenmaier

    2016-12-07

    Data files for the NWEI Azura grid-connected deployment at the 30-meter berth of the US Navys Wave Energy Test Site (WETS 30m Site) at the Kaneohe Marine Corps Base Hawaii (MCBH) on the windward (northeast) coast of the island of Oahu, HI. See general documentation describing specifics of the data files and formats in a separate submission.

  15. Dragon docked to Node 2

    NASA Image and Video Library

    2012-10-14

    ISS033-E-012429 (14 Oct. 2012) --- Attached to the Earth-facing side of the Harmony node, the SpaceX Dragon commercial cargo craft is featured in this image photographed by an Expedition 33 crew member on the International Space Station. Dragon was berthed to Harmony on Oct. 10 and is scheduled to spend 18 days attached to the station.

  16. Dragon docked to Node 2

    NASA Image and Video Library

    2012-10-14

    ISS033-E-012422 (14 Oct. 2012) --- Attached to the Earth-facing side of the Harmony node, the SpaceX Dragon commercial cargo craft is featured in this image photographed by an Expedition 33 crew member on the International Space Station. Dragon was berthed to Harmony on Oct. 10 and is scheduled to spend 18 days attached to the station.

  17. Dragon docked to Node 2

    NASA Image and Video Library

    2012-10-14

    ISS033-E-012424 (14 Oct. 2012) --- Attached to the Earth-facing side of the Harmony node, the SpaceX Dragon commercial cargo craft is featured in this image photographed by an Expedition 33 crew member on the International Space Station. Dragon was berthed to Harmony on Oct. 10 and is scheduled to spend 18 days attached to the station.

  18. 33 CFR 110.185 - Atlantic Ocean, off the Port of Palm Beach, FL.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... 33 Navigation and Navigable Waters 1 2014-07-01 2014-07-01 false Atlantic Ocean, off the Port of... HOMELAND SECURITY ANCHORAGES ANCHORAGE REGULATIONS Anchorage Grounds § 110.185 Atlantic Ocean, off the Port... regulations. (1) Vessels in the Atlantic Ocean near Lake Worth Inlet awaiting berthing space at the Port of...

  19. 33 CFR 110.185 - Atlantic Ocean, off the Port of Palm Beach, FL.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... 33 Navigation and Navigable Waters 1 2013-07-01 2013-07-01 false Atlantic Ocean, off the Port of... HOMELAND SECURITY ANCHORAGES ANCHORAGE REGULATIONS Anchorage Grounds § 110.185 Atlantic Ocean, off the Port... regulations. (1) Vessels in the Atlantic Ocean near Lake Worth Inlet awaiting berthing space at the Port of...

  20. 33 CFR 110.185 - Atlantic Ocean, off the Port of Palm Beach, FL.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 33 Navigation and Navigable Waters 1 2010-07-01 2010-07-01 false Atlantic Ocean, off the Port of... HOMELAND SECURITY ANCHORAGES ANCHORAGE REGULATIONS Anchorage Grounds § 110.185 Atlantic Ocean, off the Port... regulations. (1) Vessels in the Atlantic Ocean near Lake Worth Inlet awaiting berthing space at the Port of...

  1. 33 CFR 110.185 - Atlantic Ocean, off the Port of Palm Beach, FL.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... 33 Navigation and Navigable Waters 1 2012-07-01 2012-07-01 false Atlantic Ocean, off the Port of... HOMELAND SECURITY ANCHORAGES ANCHORAGE REGULATIONS Anchorage Grounds § 110.185 Atlantic Ocean, off the Port... regulations. (1) Vessels in the Atlantic Ocean near Lake Worth Inlet awaiting berthing space at the Port of...

  2. 33 CFR 110.185 - Atlantic Ocean, off the Port of Palm Beach, FL.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... 33 Navigation and Navigable Waters 1 2011-07-01 2011-07-01 false Atlantic Ocean, off the Port of... HOMELAND SECURITY ANCHORAGES ANCHORAGE REGULATIONS Anchorage Grounds § 110.185 Atlantic Ocean, off the Port... regulations. (1) Vessels in the Atlantic Ocean near Lake Worth Inlet awaiting berthing space at the Port of...

  3. 76 FR 80346 - Notice of Availability for the Draft Environmental Impact Statement/Environmental Impact Report...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-12-23

    ... project. Berths 302-305 are currently operational and encompass approximately 291 acres of land and water... pursuant to Section 10 of the Rivers and Harbors Act, and Section 103 of the Marine Protection, Research... low water (MLLW) plus an additional two feet of overdepth dredging to -57 feet MLLW, (4) disposal of...

  4. 14 CFR 27.785 - Seats, berths, litters, safety belts, and harnesses.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... head injury by a safety belt plus a shoulder harness that will prevent the head from contacting any injurious object except as provided for in § 27.562(c)(5). A shoulder harness (upper torso restraint), in... serious injury in an emergency landing as a result of the static inertial load factors specified in § 27...

  5. 14 CFR 27.785 - Seats, berths, litters, safety belts, and harnesses.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... head injury by a safety belt plus a shoulder harness that will prevent the head from contacting any injurious object except as provided for in § 27.562(c)(5). A shoulder harness (upper torso restraint), in... serious injury in an emergency landing as a result of the static inertial load factors specified in § 27...

  6. 14 CFR 27.785 - Seats, berths, litters, safety belts, and harnesses.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... head injury by a safety belt plus a shoulder harness that will prevent the head from contacting any injurious object except as provided for in § 27.562(c)(5). A shoulder harness (upper torso restraint), in... serious injury in an emergency landing as a result of the static inertial load factors specified in § 27...

  7. 14 CFR 29.785 - Seats, berths, litters, safety belts, and harnesses.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... serious injury in an emergency landing as a result of the inertial factors specified in § 29.561(b) and dynamic conditions specified in § 29.562. (b) Each occupant must be protected from serious head injury by a safety belt plus a shoulder harness that will prevent the head from contacting any injurious...

  8. 14 CFR 29.785 - Seats, berths, litters, safety belts, and harnesses.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... serious injury in an emergency landing as a result of the inertial factors specified in § 29.561(b) and dynamic conditions specified in § 29.562. (b) Each occupant must be protected from serious head injury by a safety belt plus a shoulder harness that will prevent the head from contacting any injurious...

  9. 14 CFR 29.785 - Seats, berths, litters, safety belts, and harnesses.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... serious injury in an emergency landing as a result of the inertial factors specified in § 29.561(b) and dynamic conditions specified in § 29.562. (b) Each occupant must be protected from serious head injury by a safety belt plus a shoulder harness that will prevent the head from contacting any injurious...

  10. 14 CFR 27.785 - Seats, berths, litters, safety belts, and harnesses.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... head injury by a safety belt plus a shoulder harness that will prevent the head from contacting any injurious object except as provided for in § 27.562(c)(5). A shoulder harness (upper torso restraint), in... serious injury in an emergency landing as a result of the static inertial load factors specified in § 27...

  11. 14 CFR 29.785 - Seats, berths, litters, safety belts, and harnesses.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... serious injury in an emergency landing as a result of the inertial factors specified in § 29.561(b) and dynamic conditions specified in § 29.562. (b) Each occupant must be protected from serious head injury by a safety belt plus a shoulder harness that will prevent the head from contacting any injurious...

  12. NWEI Azura June 2015 data

    DOE Data Explorer

    Terry Lettenmaier

    2015-12-14

    Data files for the NWEI Azura grid-connected deployment at the 30-meter berth of the US Navy's Wave Energy Test Site (WETS 30m Site) at the Kaneohe Marine Corps Base Hawai'i (MCBH) on the windward (northeast) coast of the island of O'ahu, HI. See general documentation describing specifics of the data files and formats in a separate submission.

  13. NWEI Azura January 2016 data

    DOE Data Explorer

    Terry Lettenmaier

    2016-01-01

    Data files for the NWEI Azura grid-connected deployment at the 30-meter berth of the US Navy's Wave Energy Test Site (WETS 30m Site) at the Kaneohe Marine Corps Base Hawai'i (MCBH) on the windward (northeast) coast of the island of Oahu, HI. See general documentation describing specifics of the data files and formats in a separate submission.

  14. NWEI Azura July 2015 data

    DOE Data Explorer

    Terry Lettenmaier

    2015-12-14

    Data files for the NWEI Azura grid-connected deployment at the 30-meter berth of the US Navy's Wave Energy Test Site (WETS 30m Site) at the Kaneohe Marine Corps Base Hawaii (MCBH) on the windward (northeast) coast of the island of Oahu, HI. See general documentation describing specifics of the data files and formats in a separate submission.

  15. NWEI Azura December 2015 data

    DOE Data Explorer

    Terry Lettenmaier

    2016-02-21

    Data files for the NWEI Azura grid-connected deployment at the 30-meter berth of the US Navy's Wave Energy Test Site (WETS 30m Site) at the Kaneohe Marine Corps Base Hawai'i (MCBH) on the windward (northeast) coast of the island of O'ahu, HI. See general documentation describing specifics of the data files and formats in a separate submission.

  16. NWEI Azura Aug 2015 data

    DOE Data Explorer

    Terry Lettenmaier

    2015-12-14

    Data files for the NWEI Azura grid-connected deployment at the 30-meter berth of the US Navy's Wave Energy Test Site (WETS 30m Site) at the Kaneohe Marine Corps Base Hawai'i (MCBH) on the windward (northeast) coast of the island of O'ahu, HI. See general documentation describing specifics of the data files and formats in a separate submission.

  17. NWEI Azura November 2015 data

    DOE Data Explorer

    Terry Lettenmaier

    2015-12-15

    Data files for the NWEI Azura grid-connected deployment at the 30-meter berth of the US Navy's Wave Energy Test Site (WETS 30m Site) at the Kaneohe Marine Corps Base Hawaii (MCBH) on the windward (northeast) coast of the island of Oahu, HI. See general documentation describing specifics of the data files and formats in a separate submission.

  18. NWEI Azura Sept 2015 data

    DOE Data Explorer

    Terry Lettenmaier

    2015-12-14

    Data files for the NWEI Azura grid-connected deployment at the 30-meter berth of the US Navy's Wave Energy Test Site (WETS 30m Site) at the Kaneohe Marine Corps Base Hawaii (MCBH) on the windward (northeast) coast of the island of Oahu, HI. See general documentation describing specifics of the data files and formats in a separate submission.

  19. NWEI Azura Oct 2015 data

    DOE Data Explorer

    Terry Lettenmaier

    2015-12-14

    Data files for the NWEI Azura grid-connected deployment at the 30-meter berth of the US Navy's Wave Energy Test Site (WETS 30m Site) at the Kaneohe Marine Corps Base Hawaii (MCBH) on the windward (northeast) coast of the island of Oahu, HI. See general documentation describing specifics of the data files and formats in a separate submission.

  20. Hubble Space Telescope nears Shuttle Endeavour

    NASA Image and Video Library

    1993-12-04

    STS061-73-040 (4 Dec 1993) --- Backdropped against the blackness of space, the Hubble Space Telescope (HST) nears the Space Shuttle Endeavour. With the aid of the Remote Manipulator System (RMS), the STS-61 crew members later grappled the spacecraft and berthed it in the cargo bay for five-days of servicing chores by four space walkers.

  1. Autonomous rendezvous and docking operations of unmanned expendable cargo transfer vehicles (e.g. Centaur) with Space Station Freedom

    NASA Technical Reports Server (NTRS)

    Emmet, Brian R.

    1991-01-01

    This paper describes the results of the feasibility study using Centaur or other CTV's to deliver payloads to the Space Station Freedom (SSF). During this study was examined the requirements upon unmanned cargo transfer stages (including Centaur) for phasing, rendezvous, proximity operations and docking/berthing (capture).

  2. 49 CFR 177.841 - Division 6.1 and Division 2.3 materials.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... this section, bearing or required to bear a POISON or POISON INHALATION HAZARD label or placard in the... loaded into another closed unit load device; (2) Bearing or required to bear a POISON, POISON GAS or POISON INHALATION HAZARD label in the driver's compartment (including a sleeper berth) of a motor vehicle...

  3. 49 CFR 177.841 - Division 6.1 and Division 2.3 materials.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... this section, bearing or required to bear a POISON or POISON INHALATION HAZARD label or placard in the... loaded into another closed unit load device; (2) Bearing or required to bear a POISON, POISON GAS or POISON INHALATION HAZARD label in the driver's compartment (including a sleeper berth) of a motor vehicle...

  4. 49 CFR 177.841 - Division 6.1 and Division 2.3 materials.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... this section, bearing or required to bear a POISON or POISON INHALATION HAZARD label or placard in the... loaded into another closed unit load device; (2) Bearing or required to bear a POISON, POISON GAS or POISON INHALATION HAZARD label in the driver's compartment (including a sleeper berth) of a motor vehicle...

  5. 49 CFR 177.841 - Division 6.1 and Division 2.3 materials.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... this section, bearing or required to bear a POISON or POISON INHALATION HAZARD label or placard in the... loaded into another closed unit load device; (2) Bearing or required to bear a POISON, POISON GAS or POISON INHALATION HAZARD label in the driver's compartment (including a sleeper berth) of a motor vehicle...

  6. NWEI Azura February 2018 data

    DOE Office of Scientific and Technical Information (OSTI.GOV)

    Lettenmaier, Terry

    Data files for the NWEI Azura grid-connected deployment at the 30-meter berth of the US Navys Wave Energy Test Site (WETS 30m Site) at the Kaneohe Marine Corps Base Hawaii (MCBH) on the windward (northeast) coast of the island of Oahu, HI. See general documentation describing specifics of the data files and formats in a separate submission.

  7. NWEI Azura April 2018 data

    DOE Office of Scientific and Technical Information (OSTI.GOV)

    Lettenmaier, Terry

    Data files for the NWEI Azura grid-connected deployment at the 30-meter berth of the US Navys Wave Energy Test Site (WETS 30m Site) at the Kaneohe Marine Corps Base Hawaii (MCBH) on the windward (northeast) coast of the island of Oahu, HI. See general documentation describing specifics of the data files and formats in a separate submission.

  8. NWEI Azura March 2018 data

    DOE Office of Scientific and Technical Information (OSTI.GOV)

    Lettenmaier, Terry

    Data files for the NWEI Azura grid-connected deployment at the 30-meter berth of the US Navys Wave Energy Test Site (WETS 30m Site) at the Kaneohe Marine Corps Base Hawaii (MCBH) on the windward (northeast) coast of the island of Oahu, HI. See general documentation describing specifics of the data files and formats in a separate submission.

  9. HST,survey views of Hubble after berthing in payload bay on Flight Day 3

    NASA Image and Video Library

    1997-02-13

    S82-E-5140 (13 Feb. 1997) --- A back-lighted full view of the Hubble Space Telescope (HST) in the grasp of the Remote Manipulation System (RMS) following capture early today. The limb of Earth forms part of the background. This view was taken with an Electronic Still Camera (ESC).

  10. From ideals to deals-The effect of impartiality experience on stakeholder behavior.

    PubMed

    Halko, Marja-Liisa; Miettinen, Topi

    2017-01-01

    In this paper, we study a two-party pie-sharing problem in the presence of asymmetries in the stakeholders' private endowments. Both the two stakeholders and third-party arbitrators may influence the outcome. We consider Nash-demand negotiations, where the two stakeholders place demands and share the pie accordingly if demands are compatible, and elicit dictatorial allocations from the stakeholders and the arbitrators. The Nash demands by stakeholders are strategic; the dictatorial allocations by stakeholders and arbitrators are non-strategic. We are interested in the influence of the past arbitrator experience on stakeholder allocations and demands and the past stakeholder experience on third-party arbitration allocations. We find that the ex-arbitrators' stakeholder allocations differ more from the impartial ideal than the stakeholder allocations by those without arbitration experience. In contrast with previous findings, the arbitration outcomes do not depend on the asymmetries in the previous stakeholder roles.

  11. From ideals to deals—The effect of impartiality experience on stakeholder behavior

    PubMed Central

    2017-01-01

    In this paper, we study a two-party pie-sharing problem in the presence of asymmetries in the stakeholders' private endowments. Both the two stakeholders and third-party arbitrators may influence the outcome. We consider Nash-demand negotiations, where the two stakeholders place demands and share the pie accordingly if demands are compatible, and elicit dictatorial allocations from the stakeholders and the arbitrators. The Nash demands by stakeholders are strategic; the dictatorial allocations by stakeholders and arbitrators are non-strategic. We are interested in the influence of the past arbitrator experience on stakeholder allocations and demands and the past stakeholder experience on third-party arbitration allocations. We find that the ex-arbitrators' stakeholder allocations differ more from the impartial ideal than the stakeholder allocations by those without arbitration experience. In contrast with previous findings, the arbitration outcomes do not depend on the asymmetries in the previous stakeholder roles. PMID:28786988

  12. Robust Inversion and Data Compression in Control Allocation

    NASA Technical Reports Server (NTRS)

    Hodel, A. Scottedward

    2000-01-01

    We present an off-line computational method for control allocation design. The control allocation function delta = F(z)tau = delta (sub 0) (z) mapping commanded body-frame torques to actuator commands is implicitly specified by trim condition delta (sub 0) (z) and by a robust pseudo-inverse problem double vertical line I - G(z) F(z) double vertical line less than epsilon (z) where G(z) is a system Jacobian evaluated at operating point z, z circumflex is an estimate of z, and epsilon (z) less than 1 is a specified error tolerance. The allocation function F(z) = sigma (sub i) psi (z) F (sub i) is computed using a heuristic technique for selecting wavelet basis functions psi and a constrained least-squares criterion for selecting the allocation matrices F (sub i). The method is applied to entry trajectory control allocation for a reusable launch vehicle (X-33).

  13. Optimization, Monotonicity and the Determination of Nash Equilibria — An Algorithmic Analysis

    NASA Astrophysics Data System (ADS)

    Lozovanu, D.; Pickl, S. W.; Weber, G.-W.

    2004-08-01

    This paper is concerned with the optimization of a nonlinear time-discrete model exploiting the special structure of the underlying cost game and the property of inverse matrices. The costs are interlinked by a system of linear inequalities. It is shown that, if the players cooperate, i.e., minimize the sum of all the costs, they achieve a Nash equilibrium. In order to determine Nash equilibria, the simplex method can be applied with respect to the dual problem. An introduction into the TEM model and its relationship to an economic Joint Implementation program is given. The equivalence problem is presented. The construction of the emission cost game and the allocation problem is explained. The assumption of inverse monotony for the matrices leads to a new result in the area of such allocation problems. A generalization of such problems is presented.

  14. Optimized maritime emergency resource allocation under dynamic demand.

    PubMed

    Zhang, Wenfen; Yan, Xinping; Yang, Jiaqi

    2017-01-01

    Emergency resource is important for people evacuation and property rescue when accident occurs. The relief efforts could be promoted by a reasonable emergency resource allocation schedule in advance. As the marine environment is complicated and changeful, the place, type, severity of maritime accident is uncertain and stochastic, bringing about dynamic demand of emergency resource. Considering dynamic demand, how to make a reasonable emergency resource allocation schedule is challenging. The key problem is to determine the optimal stock of emergency resource for supplier centers to improve relief efforts. This paper studies the dynamic demand, and which is defined as a set. Then a maritime emergency resource allocation model with uncertain data is presented. Afterwards, a robust approach is developed and used to make sure that the resource allocation schedule performs well with dynamic demand. Finally, a case study shows that the proposed methodology is feasible in maritime emergency resource allocation. The findings could help emergency manager to schedule the emergency resource allocation more flexibly in terms of dynamic demand.

  15. Optimized maritime emergency resource allocation under dynamic demand

    PubMed Central

    Yan, Xinping; Yang, Jiaqi

    2017-01-01

    Emergency resource is important for people evacuation and property rescue when accident occurs. The relief efforts could be promoted by a reasonable emergency resource allocation schedule in advance. As the marine environment is complicated and changeful, the place, type, severity of maritime accident is uncertain and stochastic, bringing about dynamic demand of emergency resource. Considering dynamic demand, how to make a reasonable emergency resource allocation schedule is challenging. The key problem is to determine the optimal stock of emergency resource for supplier centers to improve relief efforts. This paper studies the dynamic demand, and which is defined as a set. Then a maritime emergency resource allocation model with uncertain data is presented. Afterwards, a robust approach is developed and used to make sure that the resource allocation schedule performs well with dynamic demand. Finally, a case study shows that the proposed methodology is feasible in maritime emergency resource allocation. The findings could help emergency manager to schedule the emergency resource allocation more flexibly in terms of dynamic demand. PMID:29240792

  16. Titrating versus targeting home care services to frail elderly clients: an application of agency theory and cost-benefit analysis to home care policy.

    PubMed

    Weissert, William; Chernew, Michael; Hirth, Richard

    2003-02-01

    The article summarizes the shortcomings of current home care targeting policy, provides a conceptual framework for understanding the sources of its problems, and proposes an alternative resource allocation method. Methods required for different aspects of the study included synthesis of the published literature, regression analysis of risk predictors, and comparison of actual resource allocations with simulated budgets. Problems of imperfect agency ranging from unclear goals and inappropriate incentives to lack of information about the marginal effectiveness of home care could be mitigated with an improved budgeting method that combines client selection and resource allocation. No program can produce its best outcome performance when its goals are unclear and its technology is unstandardized. Titration of care would reallocate resources to maximize marginal benefit for marginal cost.

  17. A QoS Aware Resource Allocation Strategy for 3D A/V Streaming in OFDMA Based Wireless Systems

    PubMed Central

    Chung, Young-uk; Choi, Yong-Hoon; Park, Suwon; Lee, Hyukjoon

    2014-01-01

    Three-dimensional (3D) video is expected to be a “killer app” for OFDMA-based broadband wireless systems. The main limitation of 3D video streaming over a wireless system is the shortage of radio resources due to the large size of the 3D traffic. This paper presents a novel resource allocation strategy to address this problem. In the paper, the video-plus-depth 3D traffic type is considered. The proposed resource allocation strategy focuses on the relationship between 2D video and the depth map, handling them with different priorities. It is formulated as an optimization problem and is solved using a suboptimal heuristic algorithm. Numerical results show that the proposed scheme provides a better quality of service compared to conventional schemes. PMID:25250377

  18. Irrigation water allocation optimization using multi-objective evolutionary algorithm (MOEA) - a review

    NASA Astrophysics Data System (ADS)

    Fanuel, Ibrahim Mwita; Mushi, Allen; Kajunguri, Damian

    2018-03-01

    This paper analyzes more than 40 papers with a restricted area of application of Multi-Objective Genetic Algorithm, Non-Dominated Sorting Genetic Algorithm-II and Multi-Objective Differential Evolution (MODE) to solve the multi-objective problem in agricultural water management. The paper focused on different application aspects which include water allocation, irrigation planning, crop pattern and allocation of available land. The performance and results of these techniques are discussed. The review finds that there is a potential to use MODE to analyzed the multi-objective problem, the application is more significance due to its advantage of being simple and powerful technique than any Evolutionary Algorithm. The paper concludes with the hopeful new trend of research that demand effective use of MODE; inclusion of benefits derived from farm byproducts and production costs into the model.

  19. A Multi-layer Dynamic Model for Coordination Based Group Decision Making in Water Resource Allocation and Scheduling

    NASA Astrophysics Data System (ADS)

    Huang, Wei; Zhang, Xingnan; Li, Chenming; Wang, Jianying

    Management of group decision-making is an important issue in water source management development. In order to overcome the defects in lacking of effective communication and cooperation in the existing decision-making models, this paper proposes a multi-layer dynamic model for coordination in water resource allocation and scheduling based group decision making. By introducing the scheme-recognized cooperative satisfaction index and scheme-adjusted rationality index, the proposed model can solve the problem of poor convergence of multi-round decision-making process in water resource allocation and scheduling. Furthermore, the problem about coordination of limited resources-based group decision-making process can be solved based on the effectiveness of distance-based group of conflict resolution. The simulation results show that the proposed model has better convergence than the existing models.

  20. Modeling and simulation of dynamic ant colony's labor division for task allocation of UAV swarm

    NASA Astrophysics Data System (ADS)

    Wu, Husheng; Li, Hao; Xiao, Renbin; Liu, Jie

    2018-02-01

    The problem of unmanned aerial vehicle (UAV) task allocation not only has the intrinsic attribute of complexity, such as highly nonlinear, dynamic, highly adversarial and multi-modal, but also has a better practicability in various multi-agent systems, which makes it more and more attractive recently. In this paper, based on the classic fixed response threshold model (FRTM), under the idea of "problem centered + evolutionary solution" and by a bottom-up way, the new dynamic environmental stimulus, response threshold and transition probability are designed, and a dynamic ant colony's labor division (DACLD) model is proposed. DACLD allows a swarm of agents with a relatively low-level of intelligence to perform complex tasks, and has the characteristic of distributed framework, multi-tasks with execution order, multi-state, adaptive response threshold and multi-individual response. With the proposed model, numerical simulations are performed to illustrate the effectiveness of the distributed task allocation scheme in two situations of UAV swarm combat (dynamic task allocation with a certain number of enemy targets and task re-allocation due to unexpected threats). Results show that our model can get both the heterogeneous UAVs' real-time positions and states at the same time, and has high degree of self-organization, flexibility and real-time response to dynamic environments.

  1. Optimal allocation of resources for suppressing epidemic spreading on networks

    NASA Astrophysics Data System (ADS)

    Chen, Hanshuang; Li, Guofeng; Zhang, Haifeng; Hou, Zhonghuai

    2017-07-01

    Efficient allocation of limited medical resources is crucial for controlling epidemic spreading on networks. Based on the susceptible-infected-susceptible model, we solve the optimization problem of how best to allocate the limited resources so as to minimize prevalence, providing that the curing rate of each node is positively correlated to its medical resource. By quenched mean-field theory and heterogeneous mean-field (HMF) theory, we prove that an epidemic outbreak will be suppressed to the greatest extent if the curing rate of each node is directly proportional to its degree, under which the effective infection rate λ has a maximal threshold λcopt=1 / , where is the average degree of the underlying network. For a weak infection region (λ ≳λcopt ), we combine perturbation theory with the Lagrange multiplier method (LMM) to derive the analytical expression of optimal allocation of the curing rates and the corresponding minimized prevalence. For a general infection region (λ >λcopt ), the high-dimensional optimization problem is converted into numerically solving low-dimensional nonlinear equations by the HMF theory and LMM. Counterintuitively, in the strong infection region the low-degree nodes should be allocated more medical resources than the high-degree nodes to minimize prevalence. Finally, we use simulated annealing to validate the theoretical results.

  2. Superframe Duration Allocation Schemes to Improve the Throughput of Cluster-Tree Wireless Sensor Networks

    PubMed Central

    Leão, Erico; Montez, Carlos; Moraes, Ricardo; Portugal, Paulo; Vasques, Francisco

    2017-01-01

    The use of Wireless Sensor Network (WSN) technologies is an attractive option to support wide-scale monitoring applications, such as the ones that can be found in precision agriculture, environmental monitoring and industrial automation. The IEEE 802.15.4/ZigBee cluster-tree topology is a suitable topology to build wide-scale WSNs. Despite some of its known advantages, including timing synchronisation and duty-cycle operation, cluster-tree networks may suffer from severe network congestion problems due to the convergecast pattern of its communication traffic. Therefore, the careful adjustment of transmission opportunities (superframe durations) allocated to the cluster-heads is an important research issue. This paper proposes a set of proportional Superframe Duration Allocation (SDA) schemes, based on well-defined protocol and timing models, and on the message load imposed by child nodes (Load-SDA scheme), or by number of descendant nodes (Nodes-SDA scheme) of each cluster-head. The underlying reasoning is to adequately allocate transmission opportunities (superframe durations) and parametrize buffer sizes, in order to improve the network throughput and avoid typical problems, such as: network congestion, high end-to-end communication delays and discarded messages due to buffer overflows. Simulation assessments show how proposed allocation schemes may clearly improve the operation of wide-scale cluster-tree networks. PMID:28134822

  3. Allocation of Playing Time within Team Sports--A Problem for Discussion

    ERIC Educational Resources Information Center

    Lorentzen, Torbjørn

    2017-01-01

    The background of the article is the recurrent discussion about allocation of playing time in team sports involving children and young athletes. The objective is to analyse "why" playing time is a topic for discussion among parents, coaches and athletes. The following question is addressed: Under which condition is it "fair" to…

  4. Research versus Advocacy in the Allocation of Resources: Problems, Causes, Solutions.

    ERIC Educational Resources Information Center

    Menolascino, Frank J.; Stark, Jack A.

    1990-01-01

    This commentary on EC 231 901 discusses whether resource allocations and service policies for mentally retarded individuals should be based upon purported findings of scientific theory or the purported needs of service systems. The paper calls for improved research utilization and understanding of what makes a social movement work. (JDD)

  5. The Cost Structure of Higher Education: Implications for Governmental Policy in Steady State.

    ERIC Educational Resources Information Center

    Lyell, Edward H.

    The historical pattern of resource allocation in American higher education as exemplified by public colleges in Colorado was examined. The reliance upon average cost information in making resource allocation decisions was critiqued for the special problems that arise from student enrollment decline or steady state. A model of resource allocation…

  6. Distributive Decisions in Education: Goals, Trade-Offs, and Feasibility Constraints

    ERIC Educational Resources Information Center

    Shores, Kenneth; Loeb, Susanna

    2016-01-01

    Educators, policymakers, and citizens face questions of how to allocate scarce resources in the pursuit of competing goals for children and youth. Our goal in this article is to provide decision-makers with a framework for considering allocative problems in education, explicitly highlighting the implications of relevant feasibility constraints. We…

  7. Implementation and Incentive of Education Policies: Experience from the High School Admissions Quota Allocation Policy

    ERIC Educational Resources Information Center

    Shiyue, Wang

    2017-01-01

    Improving administrative efficiency is the core problem in administrative governance. This case study of quota allocation policy implementation in City A reveals that a set of education policy implementation and incentive mechanisms revolving around responsibility contracts and target evaluations has already taken shape, to guarantee effective…

  8. Carbon allocation and morphology of cherrybark oak seedlings and sprouts under three light regimes

    Treesearch

    Brian Roy Lockhart; Emile S. Gardiner; John D. Hodges; Andrew W. Ezell

    2008-01-01

    Continued problems in regenerating oak forests has led to a need for more basic infomation on oak seedling biology.In the present study, carbon allocation and morphology were compared between cherrybark oak (Quercus pagoda Raf.) seedlings and sprouts at I -Lag grown in full, 47%, and 20% sunlight....

  9. Optimal water resource allocation modelling in the Lowveld of Zimbabwe

    NASA Astrophysics Data System (ADS)

    Mhiribidi, Delight; Nobert, Joel; Gumindoga, Webster; Rwasoka, Donald T.

    2018-05-01

    The management and allocation of water from multi-reservoir systems is complex and thus requires dynamic modelling systems to achieve optimality. A multi-reservoir system in the Southern Lowveld of Zimbabwe is used for irrigation of sugarcane estates that produce sugar for both local and export consumption. The system is burdened with water allocation problems, made worse by decommissioning of dams. Thus the aim of this research was to develop an operating policy model for the Lowveld multi-reservoir system.The Mann Kendall Trend and Wilcoxon Signed-Rank tests were used to assess the variability of historic monthly rainfall and dam inflows for the period 1899-2015. The WEAP model was set up to evaluate the water allocation system of the catchment and come-up with a reference scenario for the 2015/2016 hydrologic year. Stochastic Dynamic Programming approach was used for optimisation of the multi-reservoirs releases.Results showed no significant trend in the rainfall but a significantly decreasing trend in inflows (p < 0.05). The water allocation model (WEAP) showed significant deficits ( ˜ 40 %) in irrigation water allocation in the reference scenario. The optimal rule curves for all the twelve months for each reservoir were obtained and considered to be a proper guideline for solving multi- reservoir management problems within the catchment. The rule curves are effective tools in guiding decision makers in the release of water without emptying the reservoirs but at the same time satisfying the demands based on the inflow, initial storage and end of month storage.

  10. Simulation model for port shunting yards

    NASA Astrophysics Data System (ADS)

    Rusca, A.; Popa, M.; Rosca, E.; Rosca, M.; Dragu, V.; Rusca, F.

    2016-08-01

    Sea ports are important nodes in the supply chain, joining two high capacity transport modes: rail and maritime transport. The huge cargo flows transiting port requires high capacity construction and installation such as berths, large capacity cranes, respectively shunting yards. However, the port shunting yards specificity raises several problems such as: limited access since these are terminus stations for rail network, the in-output of large transit flows of cargo relatively to the scarcity of the departure/arrival of a ship, as well as limited land availability for implementing solutions to serve these flows. It is necessary to identify technological solutions that lead to an answer to these problems. The paper proposed a simulation model developed with ARENA computer simulation software suitable for shunting yards which serve sea ports with access to the rail network. Are investigates the principal aspects of shunting yards and adequate measures to increase their transit capacity. The operation capacity for shunting yards sub-system is assessed taking in consideration the required operating standards and the measure of performance (e.g. waiting time for freight wagons, number of railway line in station, storage area, etc.) of the railway station are computed. The conclusion and results, drawn from simulation, help transports and logistics specialists to test the proposals for improving the port management.

  11. Nanoscale molecular communication networks: a game-theoretic perspective

    NASA Astrophysics Data System (ADS)

    Jiang, Chunxiao; Chen, Yan; Ray Liu, K. J.

    2015-12-01

    Currently, communication between nanomachines is an important topic for the development of novel devices. To implement a nanocommunication system, diffusion-based molecular communication is considered as a promising bio-inspired approach. Various technical issues about molecular communications, including channel capacity, noise and interference, and modulation and coding, have been studied in the literature, while the resource allocation problem among multiple nanomachines has not been well investigated, which is a very important issue since all the nanomachines share the same propagation medium. Considering the limited computation capability of nanomachines and the expensive information exchange cost among them, in this paper, we propose a game-theoretic framework for distributed resource allocation in nanoscale molecular communication systems. We first analyze the inter-symbol and inter-user interference, as well as bit error rate performance, in the molecular communication system. Based on the interference analysis, we formulate the resource allocation problem as a non-cooperative molecule emission control game, where the Nash equilibrium is found and proved to be unique. In order to improve the system efficiency while guaranteeing fairness, we further model the resource allocation problem using a cooperative game based on the Nash bargaining solution, which is proved to be proportionally fair. Simulation results show that the Nash bargaining solution can effectively ensure fairness among multiple nanomachines while achieving comparable social welfare performance with the centralized scheme.

  12. Can self-care health books affect amount of contact with the primary health care team? A randomized controlled trial in general practice.

    PubMed

    Platts, Amanda; Mitton, Rosly; Boniface, David; Friedli, Karin

    2005-09-01

    To investigate the effects of two differently styled self-care health books in general practice on the frequency and duration of patients' consultations and their views of the books. Random allocation of patients to either a descriptive or a decision-tree based self-care health book, or a no-book control condition. Three- and 12-months follow-up by postal questionnaire and monitoring of consultations. A large general practice in the South East of England. A total of 1967 volunteer, adult patients who attended the practice in 2001 participated. Demographics; health problems; use of health services; use and perceptions of the trial book; frequency and duration of consultations. Response rates to postal questionnaires at 3 and 12 months were 80% and 74%. In all, 48% consulted their allocated book, compared with 25% who consulted any healthcare book in the Control group. Those reporting health problems were more likely to have consulted their allocated book; 60% reported that the allocated book made them more likely to deal with a problem themselves and 40% reported themselves less likely to consult the practice. However, there were no differences in consultation rates or durations of consultations between the three groups. Handing out of self-care health books may provide qualitative benefits for patients but is unlikely to reduce attendance at the GP practice.

  13. Routing design and fleet allocation optimization of freeway service patrol: Improved results using genetic algorithm

    NASA Astrophysics Data System (ADS)

    Sun, Xiuqiao; Wang, Jian

    2018-07-01

    Freeway service patrol (FSP), is considered to be an effective method for incident management and can help transportation agency decision-makers alter existing route coverage and fleet allocation. This paper investigates the FSP problem of patrol routing design and fleet allocation, with the objective of minimizing the overall average incident response time. While the simulated annealing (SA) algorithm and its improvements have been applied to solve this problem, they often become trapped in local optimal solution. Moreover, the issue of searching efficiency remains to be further addressed. In this paper, we employ the genetic algorithm (GA) and SA to solve the FSP problem. To maintain population diversity and avoid premature convergence, niche strategy is incorporated into the traditional genetic algorithm. We also employ elitist strategy to speed up the convergence. Numerical experiments have been conducted with the help of the Sioux Falls network. Results show that the GA slightly outperforms the dual-based greedy (DBG) algorithm, the very large-scale neighborhood searching (VLNS) algorithm, the SA algorithm and the scenario algorithm.

  14. Marginal Contribution-Based Distributed Subchannel Allocation in Small Cell Networks.

    PubMed

    Shah, Shashi; Kittipiyakul, Somsak; Lim, Yuto; Tan, Yasuo

    2018-05-10

    The paper presents a game theoretic solution for distributed subchannel allocation problem in small cell networks (SCNs) analyzed under the physical interference model. The objective is to find a distributed solution that maximizes the welfare of the SCNs, defined as the total system capacity. Although the problem can be addressed through best-response (BR) dynamics, the existence of a steady-state solution, i.e., a pure strategy Nash equilibrium (NE), cannot be guaranteed. Potential games (PGs) ensure convergence to a pure strategy NE when players rationally play according to some specified learning rules. However, such a performance guarantee comes at the expense of complete knowledge of the SCNs. To overcome such requirements, properties of PGs are exploited for scalable implementations, where we utilize the concept of marginal contribution (MC) as a tool to design learning rules of players’ utility and propose the marginal contribution-based best-response (MCBR) algorithm of low computational complexity for the distributed subchannel allocation problem. Finally, we validate and evaluate the proposed scheme through simulations for various performance metrics.

  15. Development of a conceptual integrated traffic safety problem identification database

    DOT National Transportation Integrated Search

    1999-12-01

    The project conceptualized a traffic safety risk management information system and statistical database for improved problem-driver identification, countermeasure development, and resource allocation. The California Department of Motor Vehicles Drive...

  16. New Mathematical Strategy Using Branch and Bound Method

    NASA Astrophysics Data System (ADS)

    Tarray, Tanveer Ahmad; Bhat, Muzafar Rasool

    In this paper, the problem of optimal allocation in stratified random sampling is used in the presence of nonresponse. The problem is formulated as a nonlinear programming problem (NLPP) and is solved using Branch and Bound method. Also the results are formulated through LINGO.

  17. Scenario-based modeling for multiple allocation hub location problem under disruption risk: multiple cuts Benders decomposition approach

    NASA Astrophysics Data System (ADS)

    Yahyaei, Mohsen; Bashiri, Mahdi

    2017-12-01

    The hub location problem arises in a variety of domains such as transportation and telecommunication systems. In many real-world situations, hub facilities are subject to disruption. This paper deals with the multiple allocation hub location problem in the presence of facilities failure. To model the problem, a two-stage stochastic formulation is developed. In the proposed model, the number of scenarios grows exponentially with the number of facilities. To alleviate this issue, two approaches are applied simultaneously. The first approach is to apply sample average approximation to approximate the two stochastic problem via sampling. Then, by applying the multiple cuts Benders decomposition approach, computational performance is enhanced. Numerical studies show the effective performance of the SAA in terms of optimality gap for small problem instances with numerous scenarios. Moreover, performance of multi-cut Benders decomposition is assessed through comparison with the classic version and the computational results reveal the superiority of the multi-cut approach regarding the computational time and number of iterations.

  18. Allocation and management issues in multiple-transaction open access transmission networks

    NASA Astrophysics Data System (ADS)

    Tao, Shu

    This thesis focuses on some key issues related to allocation and management by the independent grid operator (IGO) of unbundled services in multiple-transaction open access transmission networks. The three unbundled services addressed in the thesis are transmission real power losses, reactive power support requirements from generation sources, and transmission congestion management. We develop the general framework that explicitly represents multiple transactions undertaken simultaneously in the transmission grid. This framework serves as the basis for formulating various problems treated in the thesis. We use this comprehensive framework to develop a physical-flow-based mechanism to allocate the total transmission losses to each transaction using the system. An important property of the allocation scheme is its capability to effectively deal with counter flows that result in the presence of specific transactions. Using the loss allocation results as the basis, we construct the equivalent loss compensation concept and apply it to develop flexible and effective procedures for compensating losses in multiple-transaction networks. We present a new physical-flow-based mechanism for allocating the reactive power support requirements provided by generators in multiple-transaction networks. The allocatable reactive support requirements are formulated as the sum of two specific components---the voltage magnitude variation component and the voltage angle variation component. The formulation utilizes the multiple-transaction framework and makes use of certain simplifying approximations. The formulation leads to a natural allocation as a function of the amount of each transaction. The physical interpretation of each allocation as a sensitivity of the reactive output of a generator is discussed. We propose a congestion management allocation scheme for multiple-transaction networks. The proposed scheme determines the allocation of congestion among the transactions on a physical-flow basis. It also proposes a congestion relief scheme that removes the congestion attributed to each transaction on the network in a least-cost manner to the IGO and determines the appropriate transmission charges to each transaction for its transmission usage. The thesis provides a compendium of problems that are natural extensions of the research results reported here and appear to be good candidates for future work.

  19. Behavioral Economic Measures of Alcohol Reward Value as Problem Severity Indicators in College Students

    PubMed Central

    Skidmore, Jessica R.; Murphy, James G.; Martens, Matthew P.

    2014-01-01

    The aims of the current study were to examine the associations among behavioral economic measures of alcohol value derived from three distinct measurement approaches, and to evaluate their respective relations with traditional indicators of alcohol problem severity in college drinkers. Five behavioral economic metrics were derived from hypothetical demand curves that quantify reward value by plotting consumption and expenditures as a function of price, another metric measured proportional behavioral allocation and enjoyment related to alcohol versus other activities, and a final metric measured relative discretionary expenditures on alcohol. The sample included 207 heavy drinking college students (53% female) who were recruited through an on-campus health center or university courses. Factor analysis revealed that the alcohol valuation construct comprises two factors: one factor that reflects participants’ levels of alcohol price sensitivity (demand persistence), and a second factor that reflects participants’ maximum consumption and monetary and behavioral allocation towards alcohol (amplitude of demand). The demand persistence and behavioral allocation metrics demonstrated the strongest and most consistent multivariate relations with alcohol-related problems, even when controlling for other well-established predictors. The results suggest that behavioral economic indices of reward value show meaningful relations with alcohol problem severity in young adults. Despite the presence of some gender differences, these measures appear to be useful problem indicators for men and women. PMID:24749779

  20. Optimal assignment of workers to supporting services in a hospital

    NASA Astrophysics Data System (ADS)

    Sawik, Bartosz; Mikulik, Jerzy

    2008-01-01

    Supporting services play an important role in health care institutions such as hospitals. This paper presents an application of operations research model for optimal allocation of workers among supporting services in a public hospital. The services include logistics, inventory management, financial management, operations management, medical analysis, etc. The optimality criterion of the problem is to minimize operations costs of supporting services subject to some specific constraints. The constraints represent specific conditions for resource allocation in a hospital. The overall problem is formulated as an integer program in the literature known as the assignment problem, where the decision variables represent the assignment of people to various jobs. The results of some computational experiments modeled on a real data from a selected Polish hospital are reported.

  1. Pilot interaction with automated airborne decision making systems

    NASA Technical Reports Server (NTRS)

    Rouse, W. B.; Chu, Y. Y.; Greenstein, J. S.; Walden, R. S.

    1976-01-01

    An investigation was made of interaction between a human pilot and automated on-board decision making systems. Research was initiated on the topic of pilot problem solving in automated and semi-automated flight management systems and attempts were made to develop a model of human decision making in a multi-task situation. A study was made of allocation of responsibility between human and computer, and discussed were various pilot performance parameters with varying degrees of automation. Optimal allocation of responsibility between human and computer was considered and some theoretical results found in the literature were presented. The pilot as a problem solver was discussed. Finally the design of displays, controls, procedures, and computer aids for problem solving tasks in automated and semi-automated systems was considered.

  2. Hybrid Resource Allocation Scheme with Proportional Fairness in OFDMA-Based Cognitive Radio Systems

    NASA Astrophysics Data System (ADS)

    Li, Li; Xu, Changqing; Fan, Pingzhi; He, Jian

    In this paper, the resource allocation problem for proportional fairness in hybrid Cognitive Radio (CR) systems is studied. In OFDMA-based CR systems, traditional resource allocation algorithms can not guarantee proportional rates among CR users (CRU) in each OFDM symbol because the number of available subchannels might be smaller than that of CRUs in some OFDM symbols. To deal with this time-varying nature of available spectrum resource, a hybrid CR scheme in which CRUs are allowed to use subchannels in both spectrum holes and primary users (PU) bands is adopted and a resource allocation algorithm is proposed to guarantee proportional rates among CRUs with no undue interference to PUs.

  3. Some practical problems in implementing randomization.

    PubMed

    Downs, Matt; Tucker, Kathryn; Christ-Schmidt, Heidi; Wittes, Janet

    2010-06-01

    While often theoretically simple, implementing randomization to treatment in a masked, but confirmable, fashion can prove difficult in practice. At least three categories of problems occur in randomization: (1) bad judgment in the choice of method, (2) design and programming errors in implementing the method, and (3) human error during the conduct of the trial. This article focuses on these latter two types of errors, dealing operationally with what can go wrong after trial designers have selected the allocation method. We offer several case studies and corresponding recommendations for lessening the frequency of problems in allocating treatment or for mitigating the consequences of errors. Recommendations include: (1) reviewing the randomization schedule before starting a trial, (2) being especially cautious of systems that use on-demand random number generators, (3) drafting unambiguous randomization specifications, (4) performing thorough testing before entering a randomization system into production, (5) maintaining a dataset that captures the values investigators used to randomize participants, thereby allowing the process of treatment allocation to be reproduced and verified, (6) resisting the urge to correct errors that occur in individual treatment assignments, (7) preventing inadvertent unmasking to treatment assignments in kit allocations, and (8) checking a sample of study drug kits to allow detection of errors in drug packaging and labeling. Although we performed a literature search of documented randomization errors, the examples that we provide and the resultant recommendations are based largely on our own experience in industry-sponsored clinical trials. We do not know how representative our experience is or how common errors of the type we have seen occur. Our experience underscores the importance of verifying the integrity of the treatment allocation process before and during a trial. Clinical Trials 2010; 7: 235-245. http://ctj.sagepub.com.

  4. Cooperative vehicle routing problem: an opportunity for cost saving

    NASA Astrophysics Data System (ADS)

    Zibaei, Sedighe; Hafezalkotob, Ashkan; Ghashami, Seyed Sajad

    2016-09-01

    In this paper, a novel methodology is proposed to solve a cooperative multi-depot vehicle routing problem. We establish a mathematical model for multi-owner VRP in which each owner (i.e. player) manages single or multiple depots. The basic idea consists of offering an option that owners cooperatively manage the VRP to save their costs. We present cooperative game theory techniques for cost saving allocations which are obtained from various coalitions of owners. The methodology is illustrated with a numerical example in which different coalitions of the players are evaluated along with the results of cooperation and cost saving allocation methods.

  5. The veil of ignorance and health resource allocation.

    PubMed

    Soto, Carlos

    2012-08-01

    Some authors view the veil of ignorance as a preferred method for allocating resources because it imposes impartiality by stripping deliberators of knowledge of their personal identity. Using some prominent examples of such reasoning in the health care sector, I will argue for the following claims. First, choice behind a veil of ignorance often fails to provide clear guidance regarding resource allocation. Second, regardless of whether definite results could be derived from the veil, these results do not in themselves have important moral standing. This is partly because the veil does not determine which features are morally relevant for a given distributive problem. Third, even when we have settled the question of what features to count, choice behind a veil of ignorance arguably fails to take persons seriously. Ultimately, we do not need the veil to solve distributive problems, and we have good reason to appeal to some other distributive model.

  6. A Decision Model for Supporting Task Allocation Processes in Global Software Development

    NASA Astrophysics Data System (ADS)

    Lamersdorf, Ansgar; Münch, Jürgen; Rombach, Dieter

    Today, software-intensive systems are increasingly being developed in a globally distributed way. However, besides its benefit, global development also bears a set of risks and problems. One critical factor for successful project management of distributed software development is the allocation of tasks to sites, as this is assumed to have a major influence on the benefits and risks. We introduce a model that aims at improving management processes in globally distributed projects by giving decision support for task allocation that systematically regards multiple criteria. The criteria and causal relationships were identified in a literature study and refined in a qualitative interview study. The model uses existing approaches from distributed systems and statistical modeling. The article gives an overview of the problem and related work, introduces the empirical and theoretical foundations of the model, and shows the use of the model in an example scenario.

  7. Online Job Allocation with Hard Allocation Ratio Requirement (Author’s Manuscript)

    DTIC Science & Technology

    2016-04-14

    where each job can only be served by a subset of servers. Such a problem exists in many emerging Internet services, such as YouTube , Netflix, etc. For...example, in the case of YouTube , each video is replicated only in a small number of servers, and each server can only serve a limited number of...streams simultaneously. When a user accesses YouTube and makes a request to watch a video, this request needs to be allocated to one of the servers that

  8. The Allocation of Federal Expenditures Among States

    NASA Technical Reports Server (NTRS)

    Lee, Maw Lin

    1967-01-01

    This study explores factors associated with the allocation offederal expenditures by states and examines the implications of theseexpenditures on the state by state distribution of incomes. Theallocation of federal expenditures is functionally oriented toward theobjectives for which various government programs are set up. Thegeographical distribution of federal expenditures, therefore, washistorically considered to be a problem incidental to governmentactivity. Because of this, relatively little attention was given tothe question of why some states receive more federal allocation thanothers. In addition, the implications of this pattern of allocationamong the several states have not been intensively investigated.

  9. There is no silver bullet: the value of diversification in planning invasive species surveillance

    Treesearch

    Denys Yemshanov; Frank H. Koch; Bo Lu; D. Barry Lyons; Jeffrey P. Prestemon; Taylor Scarr; Klaus Koehler

    2014-01-01

    In this study we demonstrate how the notion of diversification can be used in broad-scale resource allocation for surveillance of invasive species. We consider the problem of short-term surveillance for an invasive species in a geographical environment.Wefind the optimal allocation of surveillance resourcesamongmultiple geographical subdivisions via application of a...

  10. Parallel Logic Programming Architecture

    DTIC Science & Technology

    1990-04-01

    Section 3.1. 3.1. A STATIC ALLOCATION SCHEME (SAS) Methods that have been used for decomposing distributed problems in artificial intelligence...multiple agents, knowledge organization and allocation, and cooperative parallel execution. These difficulties are common to distributed artificial ...for the following reasons. First, intellegent backtracking requires much more bookkeeping and is therefore more costly during consult-time and during

  11. Optimal allocation of invasive species surveillance with the maximum expected coverage concept

    Treesearch

    Denys Yemshanov; Robert G. Haight; Frank H. Koch; Bo Lu; Robert Venette; D. Barry Lyons; Taylor Scarr; Krista Ryall; Brian. Leung

    2015-01-01

    We address the problem of geographically allocating scarce survey resources to detect pests in their pathways of introduction given information about their likelihood of movement between origins and destinations. We introduce a model for selecting destination sites for survey that departs from the aim of reducing propagule pressure (PP) in pest destinations and instead...

  12. COOPERATIVE ROUTING FOR DYNAMIC AERIAL LAYER NETWORKS

    DTIC Science & Technology

    2018-03-01

    Advisor, Computing & Communications Division Information Directorate This report is published in the interest of scientific and technical...information accumulation at the physical layer, and study the cooperative routing and resource allocation problems associated with such SU networks...interference power constraint is studied . In [Shi2012Joint], an optimal power and sub-carrier allocation strategy to maximize SUs’ throughput subject to

  13. 49 CFR 395.1 - Scope of rules in this part.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... from work within 12 consecutive hours; (iii)(A) A property-carrying commercial motor vehicle driver has...-berth and off-duty time amounting to at least 10 hours; or (4) The equivalent of at least 10 consecutive... paragraph (g)(1)(i)(A)(1) through (4) of this section; and (C) May not drive after the 14th hour after...

  14. 46 CFR 168.15-15 - Size.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 46 Shipping 7 2010-10-01 2010-10-01 false Size. 168.15-15 Section 168.15-15 Shipping COAST GUARD... § 168.15-15 Size. (a) Sleeping accommodations must be divided into rooms, no one of which may berth more... accommodate, must be marked outside the space. (b) Each room must be of such size that there is at least 1.8...

  15. 46 CFR 190.20-20 - Sleeping accommodations.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... persons. (c) Each room must be of such size that there are at least 2.78 square meters (30 square feet) of deck area and a volume of at least 5.8 cubic meters (210 cubic feet) for each person accommodated. The... size of a berth must not be less than 68 centimeters (27 inches) wide by 190 centimeters (75 inches...

  16. 46 CFR 168.15-15 - Size.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 46 Shipping 7 2011-10-01 2011-10-01 false Size. 168.15-15 Section 168.15-15 Shipping COAST GUARD... § 168.15-15 Size. (a) Sleeping accommodations must be divided into rooms, no one of which may berth more... accommodate, must be marked outside the space. (b) Each room must be of such size that there is at least 1.8...

  17. Approach of SpaceX Dragon cargo craft

    NASA Image and Video Library

    2015-01-12

    ISS042E119867(01/12/2015)--- This image, photographed by one of the Expedition 42 crew members aboard the International Space Station, shows the SpaceX Dragon cargo craft approaching on Jan. 12 2015 for its grapple and berthing and the start of a month attached to the complex. Dragon carried more than 2 ½ tons of supplies and experiments to the station.

  18. PTM Modeling of Dredged Suspended Sediment at Proposed Polaris Point and Ship Repair Facility CVN Berthing Sites - Apra Harbor, Guam

    DTIC Science & Technology

    2017-09-01

    ADCP locations used for model calibration. ......................................................................... 12 Figure 4-3. Sample water...Example of fine sediment sample [Set d, Sample B30]. (B) Example of coarse sediment sample [Set d, sample B05...Turning Basin average sediment size distribution curve. ................................................... 21 Figure 5-5. Turning Basin average size

  19. 75 FR 59197 - Hazardous Materials: Limiting the Use of Electronic Devices by Highway

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-09-27

    ............ 3.1 7.6 Look back in sleeper berth 2.3 0.2 Talk or listen to hand-held phone... 1.0 0.2 Eating 1.0 0... text messaging. Participants followed a pace car in the right lane, which braked 42 times... video and kinematic vehicle sensors) in actual driving situations created a scientific method to study...

  20. 76 FR 10771 - Hazardous Materials: Limiting the Use of Electronic Devices by Highway

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-02-28

    ... grooming 4.5 0.2 Reach for object in vehicle 3.1 7.6 Look back in sleeper berth 2.3 0.2 Talk or listen to... a pace car in the right lane, which braked 42 times, intermittently. Participants were 0.2 seconds... drivers (through video and kinematic vehicle sensors) in actual driving situations created a scientific...

  1. 36. ENGINE ROOM FROM STARBOARD SIDE OF CONTROL CONSOLE, LOOKING ...

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

    36. ENGINE ROOM FROM STARBOARD SIDE OF CONTROL CONSOLE, LOOKING AT TWO DIESEL ENGINES, STAIRS LEAD UP TO CREW'S BERTHING. THIS IMAGE IS CLOSER TO THE STERN AND MORE ANGLED TOWARDS THE PORT THAN IMAGE 34. - U.S. Coast Guard Cutter WHITE LUPINE, U.S. Coast Guard Station Rockland, east end of Tillson Avenue, Rockland, Knox County, ME

  2. A quantitative risk analysis approach to port hydrocarbon logistics.

    PubMed

    Ronza, A; Carol, S; Espejo, V; Vílchez, J A; Arnaldos, J

    2006-01-16

    A method is presented that allows quantitative risk analysis to be performed on marine hydrocarbon terminals sited in ports. A significant gap was identified in the technical literature on QRA for the handling of hazardous materials in harbours published prior to this work. The analysis is extended to tanker navigation through port waters and loading and unloading facilities. The steps of the method are discussed, beginning with data collecting. As to accident scenario identification, an approach is proposed that takes into account minor and massive spills due to loading arm failures and tank rupture. Frequency estimation is thoroughly reviewed and a shortcut approach is proposed for frequency calculation. This allows for the two-fold possibility of a tanker colliding/grounding at/near the berth or while navigating to/from the berth. A number of probability data defining the possibility of a cargo spill after an external impact on a tanker are discussed. As to consequence and vulnerability estimates, a scheme is proposed for the use of ratios between the numbers of fatal victims, injured and evacuated people. Finally, an example application is given, based on a pilot study conducted in the Port of Barcelona, where the method was tested.

  3. Docking of the SpaceX Dragon Commercial cargo craft

    NASA Image and Video Library

    2012-10-10

    ISS033-E-011170 (10 Oct. 2012) --- The SpaceX Dragon commercial cargo craft is berthed to the Earth-facing side of the International Space Station's Harmony node. Working from the robotics workstation inside the seven-windowed Cupola, Japan Aerospace Exploration Agency astronaut Aki Hoshide, Expedition 33 flight engineer, with the assistance of NASA astronaut Sunita Williams, commander, captured Dragon at 6:56 a.m. (EDT) and used the Canadarm2 robotic arm to berth Dragon to Harmony Oct. 10, 2012. Dragon is scheduled to spend 18 days attached to the station. During that time, the crew will unload 882 pounds of crew supplies, science research and hardware from the cargo craft and reload it with 1,673 pounds of cargo for return to Earth. After Dragon?s mission at the station is completed, the crew will use Canadarm2 to detach Dragon from Harmony and release it for a splashdown about six hours later in the Pacific Ocean, 250 miles off the coast of southern California. Dragon launched atop a Falcon 9 rocket at 8:35 p.m. Oct. 7 from Cape Canaveral Air Force Station in Florida, beginning NASA's first contracted cargo delivery flight, designated SpaceX CRS-1, to the station.

  4. Air quality impact assessment of at-berth ship emissions: Case-study for the project of a new freight port.

    PubMed

    Lonati, Giovanni; Cernuschi, Stefano; Sidi, Shelina

    2010-12-01

    This work is intended to assess the impact on local air quality due to atmospheric emissions from port area activities for a new port in project in the Mediterranean Sea. The sources of air pollutants in the harbour area are auxiliary engines used by ships at berth during loading/offloading operations. A fleet activity-based methodology is first applied to evaluate annual pollutant emissions (NO(X), SO(X), PM, CO and VOC) based on vessel traffic data, ships tonnage and in-port hotelling time for loading/offloading operations. The 3-dimensional Calpuff transport and dispersion model is then applied for the subsequent assessment of the ground level spatial distribution of atmospheric pollutants for both long-term and short-term averaging times. Compliance with current air quality standards in the port area is finally evaluated and indications for port operation are provided. Some methodological aspects of the impact assessment procedure, namely those concerning the steps of emission scenario definitions and model simulations set-up at the project stage, are specifically addressed, suggesting a pragmatic approach for similar evaluations for small new ports in project. Copyright © 2010 Elsevier B.V. All rights reserved.

  5. Fuzzy logic techniques for rendezvous and docking of two geostationary satellites

    NASA Technical Reports Server (NTRS)

    Ortega, Guillermo

    1995-01-01

    Large assemblings in space require the ability to manage rendezvous and docking operations. In future these techniques will be required for the gradual build up of big telecommunication platforms in the geostationary orbit. The paper discusses the use of fuzzy logic to model and implement a control system for the docking/berthing of two satellites in geostationary orbit. The system mounted in a chaser vehicle determines the actual state of both satellites and generates torques to execute maneuvers to establish the structural latching. The paper describes the proximity operations to collocate the two satellites in the same orbital window, the fuzzy guidance and navigation of the chaser approaching the target and the final Fuzzy berthing. The fuzzy logic system represents a knowledge based controller that realizes the close loop operations autonomously replacing the conventional control algorithms. The goal is to produce smooth control actions in the proximity of the target and during the docking to avoid disturbance torques in the final assembly orbit. The knowledge of the fuzzy controller consists of a data base of rules and the definitions of the fuzzy sets. The knowledge of an experienced spacecraft controller is captured into a set of rules forming the Rules Data Base.

  6. Foundation for Problem-Based Gaming

    ERIC Educational Resources Information Center

    Kiili, Kristian

    2007-01-01

    Educational games may offer a viable strategy for developing students' problem-solving skills. However, the state of art of educational game research does not provide an account for that. Thus, the aim of this research is to develop an empirically allocated model about problem-based gaming that can be utilised to design pedagogically meaningful…

  7. Energy-Efficient Cognitive Radio Sensor Networks: Parametric and Convex Transformations

    PubMed Central

    Naeem, Muhammad; Illanko, Kandasamy; Karmokar, Ashok; Anpalagan, Alagan; Jaseemuddin, Muhammad

    2013-01-01

    Designing energy-efficient cognitive radio sensor networks is important to intelligently use battery energy and to maximize the sensor network life. In this paper, the problem of determining the power allocation that maximizes the energy-efficiency of cognitive radio-based wireless sensor networks is formed as a constrained optimization problem, where the objective function is the ratio of network throughput and the network power. The proposed constrained optimization problem belongs to a class of nonlinear fractional programming problems. Charnes-Cooper Transformation is used to transform the nonlinear fractional problem into an equivalent concave optimization problem. The structure of the power allocation policy for the transformed concave problem is found to be of a water-filling type. The problem is also transformed into a parametric form for which a ε-optimal iterative solution exists. The convergence of the iterative algorithms is proven, and numerical solutions are presented. The iterative solutions are compared with the optimal solution obtained from the transformed concave problem, and the effects of different system parameters (interference threshold level, the number of primary users and secondary sensor nodes) on the performance of the proposed algorithms are investigated. PMID:23966194

  8. Investigation of Optimal Control Allocation for Gust Load Alleviation in Flight Control

    NASA Technical Reports Server (NTRS)

    Frost, Susan A.; Taylor, Brian R.; Bodson, Marc

    2012-01-01

    Advances in sensors and avionics computation power suggest real-time structural load measurements could be used in flight control systems for improved safety and performance. A conventional transport flight control system determines the moments necessary to meet the pilot's command, while rejecting disturbances and maintaining stability of the aircraft. Control allocation is the problem of converting these desired moments into control effector commands. In this paper, a framework is proposed to incorporate real-time structural load feedback and structural load constraints in the control allocator. Constrained optimal control allocation can be used to achieve desired moments without exceeding specified limits on monitored load points. Minimization of structural loads by the control allocator is used to alleviate gust loads. The framework to incorporate structural loads in the flight control system and an optimal control allocation algorithm will be described and then demonstrated on a nonlinear simulation of a generic transport aircraft with flight dynamics and static structural loads.

  9. Frequency allocations for a new satellite service - Digital audio broadcasting

    NASA Technical Reports Server (NTRS)

    Reinhart, Edward E.

    1992-01-01

    The allocation in the range 500-3000 MHz for digital audio broadcasting (DAB) is described in terms of key issues such as the transmission-system architectures. Attention is given to the optimal amount of spectrum for allocation and the technological considerations relevant to downlink bands for satellite and terrestrial transmissions. Proposals for DAB allocations are compared, and reference is made to factors impinging on the provision of ground/satellite feeder links. The allocation proposals describe the implementation of 50-60-MHz bandwidths for broadcasting in the ranges near 800 MHz, below 1525 MHz, near 2350 MHz, and near 2600 MHz. Three specific proposals are examined in terms of characteristics such as service areas, coverage/beam, channels/satellite beam, and FCC license status. Several existing problems are identified including existing services crowded with systems, the need for new bands in the 1000-3000-MHz range, and variations in the nature and intensity of implementations of existing allocations that vary from country to country.

  10. Power allocation for SWIPT in K-user interference channels using game theory

    NASA Astrophysics Data System (ADS)

    Wen, Zhigang; Liu, Ying; Liu, Xiaoqing; Li, Shan; Chen, Xianya

    2018-12-01

    A simultaneous wireless information and power transfer system in interference channels of multi-users is considered. In this system, each transmitter sends one data stream to its targeted receiver, which causes interference to other receivers. Since all transmitter-receiver links want to maximize their own average transmission rate, a power allocation problem under the transmit power constraints and the energy-harvesting constraints is developed. To solve this problem, we propose a game theory framework. Then, we convert the game into a variational inequalities problem by establishing the connection between game theory and variational inequalities and solve the variational inequalities problem. Through theoretical analysis, the existence and uniqueness of Nash equilibrium are both guaranteed by the theory of variational inequalities. A distributed iterative alternating optimization water-filling algorithm is derived, which is proved to converge. Numerical results show that the proposed algorithm reaches fast convergence and achieves a higher sum rate than the unaided scheme.

  11. Fair Resource Allocation to Health Research: Priority Topics for Bioethics Scholarship.

    PubMed

    Pratt, Bridget; Hyder, Adnan A

    2017-07-01

    This article draws attention to the limited amount of scholarship on what constitutes fairness and equity in resource allocation to health research by individual funders. It identifies three key decisions of ethical significance about resource allocation that research funders make regularly and calls for prioritizing scholarship on those topics - namely, how health resources should be fairly apportioned amongst public health and health care delivery versus health research, how health research resources should be fairly allocated between health problems experienced domestically versus other health problems typically experienced by disadvantaged populations outside the funder's country, and how domestic and non-domestic health research funding should be further apportioned to different areas, e.g. types of research and recipients. These three topics should be priorities for bioethics research because their outcomes have a substantial bearing on the achievement of health justice. The proposed agenda aims to move discussion on the ethics of health research funding beyond its current focus on the mismatch between worldwide basic and clinical research investment and the global burden of disease. Individual funders' decision-making on whether and to what extent to allocate resources to non-domestic health research, health systems research, research on the social determinants of health, capacity development, and recipients in certain countries should also be the focus of ethical scrutiny. © 2017 John Wiley & Sons Ltd.

  12. Design for Warehouse with Product Flow Type Allocation using Linear Programming: A Case Study in a Textile Industry

    NASA Astrophysics Data System (ADS)

    Khannan, M. S. A.; Nafisah, L.; Palupi, D. L.

    2018-03-01

    Sari Warna Co. Ltd, a company engaged in the textile industry, is experiencing problems in the allocation and placement of goods in the warehouse. During this time the company has not implemented the product flow type allocation and product placement to the respective products resulting in a high total material handling cost. Therefore, this study aimed to determine the allocation and placement of goods in the warehouse corresponding to product flow type with minimal total material handling cost. This research is a quantitative research based on the theory of storage and warehouse that uses a mathematical model of optimization problem solving using mathematical optimization model approach belongs to Heragu (2005), aided by software LINGO 11.0 in the calculation of the optimization model. Results obtained from this study is the proportion of the distribution for each functional area is the area of cross-docking at 0.0734, the reserve area at 0.1894, and the forward area at 0.7372. The allocation of product flow type 1 is 5 products, the product flow type 2 is 9 products, the product flow type 3 is 2 products, and the product flow type 4 is 6 products. The optimal total material handling cost by using this mathematical model equal to Rp43.079.510 while it is equal to Rp 49.869.728 by using the company’s existing method. It saves Rp6.790.218 for the total material handling cost. Thus, all of the products can be allocated in accordance with the product flow type with minimal total material handling cost.

  13. Control system of the inspection robots group applying auctions and multi-criteria analysis for task allocation

    NASA Astrophysics Data System (ADS)

    Panfil, Wawrzyniec; Moczulski, Wojciech

    2017-10-01

    In the paper presented is a control system of a mobile robots group intended for carrying out inspection missions. The main research problem was to define such a control system in order to facilitate a cooperation of the robots resulting in realization of the committed inspection tasks. Many of the well-known control systems use auctions for tasks allocation, where a subject of an auction is a task to be allocated. It seems that in the case of missions characterized by much larger number of tasks than number of robots it will be better if robots (instead of tasks) are subjects of auctions. The second identified problem concerns the one-sided robot-to-task fitness evaluation. Simultaneous assessment of the robot-to-task fitness and task attractiveness for robot should affect positively for the overall effectiveness of the multi-robot system performance. The elaborated system allows to assign tasks to robots using various methods for evaluation of fitness between robots and tasks, and using some tasks allocation methods. There is proposed the method for multi-criteria analysis, which is composed of two assessments, i.e. robot's concurrency position for task among other robots and task's attractiveness for robot among other tasks. Furthermore, there are proposed methods for tasks allocation applying the mentioned multi-criteria analysis method. The verification of both the elaborated system and the proposed tasks' allocation methods was carried out with the help of simulated experiments. The object under test was a group of inspection mobile robots being a virtual counterpart of the real mobile-robot group.

  14. Neural Network Solves "Traveling-Salesman" Problem

    NASA Technical Reports Server (NTRS)

    Thakoor, Anilkumar P.; Moopenn, Alexander W.

    1990-01-01

    Experimental electronic neural network solves "traveling-salesman" problem. Plans round trip of minimum distance among N cities, visiting every city once and only once (without backtracking). This problem is paradigm of many problems of global optimization (e.g., routing or allocation of resources) occuring in industry, business, and government. Applied to large number of cities (or resources), circuits of this kind expected to solve problem faster and more cheaply.

  15. Shared and Disorder-Specific Prefrontal Abnormalities in Boys with Pure Attention-Deficit/Hyperactivity Disorder Compared to Boys with Pure CD during Interference Inhibition and Attention Allocation

    ERIC Educational Resources Information Center

    Rubia, Katya; Halari, Rozmin; Smith, Anna B.; Mohammad, Majeed; Scott, Stephen; Brammer, Michael J.

    2009-01-01

    Background: Inhibitory and attention deficits have been suggested to be shared problems of disruptive behaviour disorders. Patients with attention deficit hyperactivity disorder (ADHD) and patients with conduct disorder (CD) show deficits in tasks of attention allocation and interference inhibition. However, functional magnetic resonance imaging…

  16. Nonprofit Decision Making and Resource Allocation: The Importance of Membership Preferences, Community Needs, and Interorganizational Ties.

    ERIC Educational Resources Information Center

    Markham, William T.; Johnson, Margaret A.; Bonjean, Charles M.

    1999-01-01

    Results of a study of community service organizations (n=12) and their communities indicate that distribution of volunteer funds and time was unrelated to community needs as measured by objective indicators. The most important determinants of resource allocation are members' perceptions of the severity of problems and their willingness to work in…

  17. Auction Mechanism to Allocate Air Traffic Control Slots

    NASA Technical Reports Server (NTRS)

    Raffarin, Marianne

    2003-01-01

    This article deals with an auction mechanism for airspace slots, as a means of solving the European airspace congestion problem. A disequilibrium, between Air Traffic Control (ATC) services supply and ATC services demand are at the origin of almost one fourth of delays in the air transport industry in Europe. In order to tackle this congestion problem, we suggest modifying both pricing and allocation of ATC services, by setting up an auction mechanism. Objects of the auction will be the right for airlines to cross a part of the airspace, and then to benefit from ATC services over a period corresponding to the necessary time for the crossing. Allocation and payment rules have to be defined according to the objectives of this auction. The auctioneer is the public authority in charge of ATC services, whose aim is to obtain an efficient allocation. Therefore, the social value will be maximized. Another objective is to internalize congestion costs. To that end, we apply the principle of Clarke-Groves mechanism auction: each winner has to pay the externalities imposed on other bidders. The complex context of ATC leads to a specific design for this auction.

  18. GIS and Game Theory for Water Resource Management

    NASA Astrophysics Data System (ADS)

    Ganjali, N.; Guney, C.

    2017-11-01

    In this study, aspects of Game theory and its application on water resources management combined with GIS techniques are detailed. First, each term is explained and the advantages and limitations of its aspect is discussed. Then, the nature of combinations between each pair and literature on the previous studies are given. Several cases were investigated and results were magnified in order to conclude with the applicability and combination of GIS- Game Theory- Water Resources Management. It is concluded that the game theory is used relatively in limited studies of water management fields such as cost/benefit allocation among users, water allocation among trans-boundary users in water resources, water quality management, groundwater management, analysis of water policies, fair allocation of water resources development cost and some other narrow fields. Also, Decision-making in environmental projects requires consideration of trade-offs between socio-political, environmental, and economic impacts and is often complicated by various stakeholder views. Most of the literature on water allocation and conflict problems uses traditional optimization models to identify the most efficient scheme while the Game Theory, as an optimization method, combined GIS are beneficial platforms for agent based models to be used in solving Water Resources Management problems in the further studies.

  19. Adjacency Matrix-Based Transmit Power Allocation Strategies in Wireless Sensor Networks

    PubMed Central

    Consolini, Luca; Medagliani, Paolo; Ferrari, Gianluigi

    2009-01-01

    In this paper, we present an innovative transmit power control scheme, based on optimization theory, for wireless sensor networks (WSNs) which use carrier sense multiple access (CSMA) with collision avoidance (CA) as medium access control (MAC) protocol. In particular, we focus on schemes where several remote nodes send data directly to a common access point (AP). Under the assumption of finite overall network transmit power and low traffic load, we derive the optimal transmit power allocation strategy that minimizes the packet error rate (PER) at the AP. This approach is based on modeling the CSMA/CA MAC protocol through a finite state machine and takes into account the network adjacency matrix, depending on the transmit power distribution and determining the network connectivity. It will be then shown that the transmit power allocation problem reduces to a convex constrained minimization problem. Our results show that, under the assumption of low traffic load, the power allocation strategy, which guarantees minimal delay, requires the maximization of network connectivity, which can be equivalently interpreted as the maximization of the number of non-zero entries of the adjacency matrix. The obtained theoretical results are confirmed by simulations for unslotted Zigbee WSNs. PMID:22346705

  20. Application of a COTS Resource Optimization Framework to the SSN Sensor Tasking Domain - Part I: Problem Definition

    NASA Astrophysics Data System (ADS)

    Tran, T.

    With the onset of the SmallSat era, the RSO catalog is expected to see continuing growth in the near future. This presents a significant challenge to the current sensor tasking of the SSN. The Air Force is in need of a sensor tasking system that is robust, efficient, scalable, and able to respond in real-time to interruptive events that can change the tracking requirements of the RSOs. Furthermore, the system must be capable of using processed data from heterogeneous sensors to improve tasking efficiency. The SSN sensor tasking can be regarded as an economic problem of supply and demand: the amount of tracking data needed by each RSO represents the demand side while the SSN sensor tasking represents the supply side. As the number of RSOs to be tracked grows, demand exceeds supply. The decision-maker is faced with the problem of how to allocate resources in the most efficient manner. Braxton recently developed a framework called Multi-Objective Resource Optimization using Genetic Algorithm (MOROUGA) as one of its modern COTS software products. This optimization framework took advantage of the maturing technology of evolutionary computation in the last 15 years. This framework was applied successfully to address the resource allocation of an AFSCN-like problem. In any resource allocation problem, there are five key elements: (1) the resource pool, (2) the tasks using the resources, (3) a set of constraints on the tasks and the resources, (4) the objective functions to be optimized, and (5) the demand levied on the resources. In this paper we explain in detail how the design features of this optimization framework are directly applicable to address the SSN sensor tasking domain. We also discuss our validation effort as well as present the result of the AFSCN resource allocation domain using a prototype based on this optimization framework.

  1. Resource Allocation Algorithms for the Next Generation Cellular Networks

    NASA Astrophysics Data System (ADS)

    Amzallag, David; Raz, Danny

    This chapter describes recent results addressing resource allocation problems in the context of current and future cellular technologies. We present models that capture several fundamental aspects of planning and operating these networks, and develop new approximation algorithms providing provable good solutions for the corresponding optimization problems. We mainly focus on two families of problems: cell planning and cell selection. Cell planning deals with choosing a network of base stations that can provide the required coverage of the service area with respect to the traffic requirements, available capacities, interference, and the desired QoS. Cell selection is the process of determining the cell(s) that provide service to each mobile station. Optimizing these processes is an important step towards maximizing the utilization of current and future cellular networks.

  2. Who gets how much: funding formulas in federal public health programs.

    PubMed

    Buehler, James W; Holtgrave, David R

    2007-01-01

    Federal public health programs use a mix of formula-based and competitive methods to allocate funds among states and other constituent jurisdictions. Characteristics of formula-based allocations used by a convenience sample of four programs, three from the Centers for Disease Control and Prevention and one from the Health Resources and Services Administration, are described to illustrate formula-based allocation methods in public health. Data sources in these public health formulas include population counts and funding proportions based on historical precedent. None include factors that adjust allocations based on variations in the availability of local resources or the cost of delivering services. Formula-funded activities are supplemented by programs that target specific prevention needs or encourage development of innovative methods to address emerging problems, using set-aside funds. A public health finance research agenda should address ways to improve the fit between funding allocation formulas and program objectives.

  3. Optimal traffic resource allocation and management.

    DOT National Transportation Integrated Search

    2010-05-01

    "In this paper, we address the problem of determining the patrol routes of state troopers for maximum coverage of : highway spots with high frequencies of crashes (hot spots). We develop a mixed integer linear programming model : for this problem und...

  4. NREL MOIS Data for NWEI Azura September 2016

    DOE Data Explorer

    Eric Nelson

    2016-10-07

    NREL MOIS data files for the Azura grid-connected deployment at the 30-meter berth of the US Navys Wave Energy Test Site (WETS 30m Site) at the Kaneohe Marine Corps Base Hawaii (MCBH) on the windward (northeast) coast of the island of Oahu, HI. See general documentation describing specifics of the data files and formats in a separate NREL submission (linked below).

  5. NREL MOIS Data for NWEI Azura June 2016

    DOE Data Explorer

    Eric Nelson

    2016-06-30

    NREL MOIS data files for the Azura grid-connected deployment at the 30-meter berth of the US Navys Wave Energy Test Site (WETS 30m Site) at the Kaneohe Marine Corps Base Hawaii (MCBH) on the windward (northeast) coast of the island of Oahu, HI. See general documentation describing specifics of the data files and formats in a separate NREL submission (linked below).

  6. NREL MOIS Data for NWEI Azura July 2016

    DOE Data Explorer

    Eric Nelson

    2016-09-25

    NREL MOIS data files for the Azura grid-connected deployment at the 30-meter berth of the US Navys Wave Energy Test Site (WETS 30m Site) at the Kaneohe Marine Corps Base Hawaii (MCBH) on the windward (northeast) coast of the island of Oahu, HI. See general documentation describing specifics of the data files and formats in a separate NREL submission (linked below).

  7. NREL MOIS Data for NWEI Azura August 2016

    DOE Data Explorer

    Eric Nelson

    2016-10-03

    NREL MOIS data files for the Azura grid-connected deployment at the 30-meter berth of the US Navys Wave Energy Test Site (WETS 30m Site) at the Kaneohe Marine Corps Base Hawaii (MCBH) on the windward (northeast) coast of the island of Oahu, HI. See general documentation describing specifics of the data files and formats in a separate NREL submission (linked below).

  8. 33 CFR 165.1151 - Security Zones; liquefied hazardous gas tank vessels, San Pedro Bay, California.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... the sea floor, within a 500 yard radius around any liquefied hazardous gas (LHG) tank vessel that is... waters, extending from the surface to the sea floor, within a 500 yard radius around any LHG tank vessel that is moored, or in the process of mooring, at any berth within the Los Angeles or Long Beach port...

  9. 33 CFR 165.1151 - Security Zones; liquefied hazardous gas tank vessels, San Pedro Bay, California.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... the sea floor, within a 500 yard radius around any liquefied hazardous gas (LHG) tank vessel that is... waters, extending from the surface to the sea floor, within a 500 yard radius around any LHG tank vessel that is moored, or in the process of mooring, at any berth within the Los Angeles or Long Beach port...

  10. 33 CFR 165.1151 - Security Zones; liquefied hazardous gas tank vessels, San Pedro Bay, California.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... the sea floor, within a 500 yard radius around any liquefied hazardous gas (LHG) tank vessel that is... waters, extending from the surface to the sea floor, within a 500 yard radius around any LHG tank vessel that is moored, or in the process of mooring, at any berth within the Los Angeles or Long Beach port...

  11. 33 CFR 165.1151 - Security Zones; liquefied hazardous gas tank vessels, San Pedro Bay, California.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... the sea floor, within a 500 yard radius around any liquefied hazardous gas (LHG) tank vessel that is... waters, extending from the surface to the sea floor, within a 500 yard radius around any LHG tank vessel that is moored, or in the process of mooring, at any berth within the Los Angeles or Long Beach port...

  12. NREL MOIS Data for NWEI Azura November 2015

    DOE Data Explorer

    Eric Nelson

    2016-05-25

    NREL MOIS data files for the Azura grid-connected deployment at the 30-meter berth of the US Navy's Wave Energy Test Site (WETS 30m Site) at the Kaneohe Marine Corps Base Hawaii (MCBH) on the windward (northeast) coast of the island of Oahu, HI. See general documentation describing specifics of the data files and formats in a separate NREL submission (linked below).

  13. NREL MOIS Data for NWEI Azura August 2015

    DOE Data Explorer

    Eric Nelson

    2016-05-23

    NREL MOIS data files for the Azura grid-connected deployment at the 30-meter berth of the US Navy's Wave Energy Test Site (WETS 30m Site) at the Kaneohe Marine Corps Base Hawaii (MCBH) on the windward (northeast) coast of the island of Oahu, HI. See general documentation describing specifics of the data files and formats in a separate NREL submission (linked below).

  14. NREL MOIS Data for NWEI Azura July 2015

    DOE Data Explorer

    Eric Nelson

    2016-05-23

    NREL MOIS data files for the Azura grid-connected deployment at the 30-meter berth of the US Navy's Wave Energy Test Site (WETS 30m Site) at the Kaneohe Marine Corps Base Hawaii (MCBH) on the windward (northeast) coast of the island of Oahu, HI. See general documentation describing specifics of the data files and formats in a separate NREL submission (linked below).

  15. NREL MOIS Data for NWEI Azura April 2016

    DOE Data Explorer

    Eric Nelson

    2016-05-31

    NREL MOIS data files for the Azura grid-connected deployment at the 30-meter berth of the US Navy's Wave Energy Test Site (WETS 30m Site) at the Kaneohe Marine Corps Base Hawaii (MCBH) on the windward (northeast) coast of the island of Oahu, HI. See general documentation describing specifics of the data files and formats in a separate NREL submission (linked below).

  16. NREL MOIS Data for NWEI Azura June 2015

    DOE Data Explorer

    Eric Nelson

    2016-05-18

    NREL MOIS data files for the Azura grid-connected deployment at the 30-meter berth of the US Navy's Wave Energy Test Site (WETS 30m Site) at the Kaneohe Marine Corps Base Hawaii (MCBH) on the windward (northeast) coast of the island of Oahu, HI. See general documentation describing specifics of the data files and formats in a separate NREL submission (linked below).

  17. NREL MOIS Data for NWEI Azura March 2016

    DOE Data Explorer

    Eric Nelson

    2016-05-31

    NREL MOIS data files for the Azura grid-connected deployment at the 30-meter berth of the US Navy's Wave Energy Test Site (WETS 30m Site) at the Kaneohe Marine Corps Base Hawaii (MCBH) on the windward (northeast) coast of the island of Oahu, HI. See general documentation describing specifics of the data files and formats in a separate NREL submission (linked below).

  18. NREL MOIS Data for NWEI Azura December 2015

    DOE Data Explorer

    Eric Nelson

    2016-05-27

    NREL MOIS data files for the Azura grid-connected deployment at the 30-meter berth of the US Navy's Wave Energy Test Site (WETS 30m Site) at the Kaneohe Marine Corps Base Hawaii (MCBH) on the windward (northeast) coast of the island of Oahu, HI. See general documentation describing specifics of the data files and formats in a separate NREL submission (linked below).

  19. NREL MOIS Data for NWEI Azura January 2016

    DOE Data Explorer

    Eric Nelson

    2016-05-27

    NREL MOIS data files for the Azura grid-connected deployment at the 30-meter berth of the US Navy's Wave Energy Test Site (WETS 30m Site) at the Kaneohe Marine Corps Base Hawaii (MCBH) on the windward (northeast) coast of the island of Oahu, HI. See general documentation describing specifics of the data files and formats in a separate NREL submission (linked below).

  20. NREL MOIS Data for NWEI Azura February 2016

    DOE Data Explorer

    Eric Nelson

    2016-05-31

    NREL MOIS data files for the Azura grid-connected deployment at the 30-meter berth of the US Navy's Wave Energy Test Site (WETS 30m Site) at the Kaneohe Marine Corps Base Hawaii (MCBH) on the windward (northeast) coast of the island of Oahu, HI. See general documentation describing specifics of the data files and formats in a separate NREL submission (linked below).

  1. NREL MOIS Data for NWEI Azura September 2015

    DOE Data Explorer

    Eric Nelson

    2016-05-24

    NREL MOIS data files for the Azura grid-connected deployment at the 30-meter berth of the US Navy's Wave Energy Test Site (WETS 30m Site) at the Kaneohe Marine Corps Base Hawaii (MCBH) on the windward (northeast) coast of the island of Oahu, HI. See general documentation describing specifics of the data files and formats in a separate NREL submission (linked below).

  2. NREL MOIS Data for NWEI Azura October 2015

    DOE Data Explorer

    Eric Nelson

    2016-05-24

    NREL MOIS data files for the Azura grid-connected deployment at the 30-meter berth of the US Navy's Wave Energy Test Site (WETS 30m Site) at the Kaneohe Marine Corps Base Hawaii (MCBH) on the windward (northeast) coast of the island of Oahu, HI. See general documentation describing specifics of the data files and formats in a separate NREL submission (linked below).

  3. 78 FR 47817 - Parts and Accessories Necessary for Safe Operation; Application for an Exemption From Van Hool N...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-08-06

    ....V. and Coach USA AGENCY: Federal Motor Carrier Safety Administration (FMCSA), DOT. ACTION: Notice of... exemption from Van Hool N.V. and Coach USA (Van Hool/Coach USA) to allow the use of double deck motorcoaches..., Van Hool/Coach USA is requesting an exemption that would allow the use of sleeper berths that comply...

  4. 37. ENGINE ROOM, FROM PORT SIDE OF CONTROL CONSOLE, LOOKING ...

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

    37. ENGINE ROOM, FROM PORT SIDE OF CONTROL CONSOLE, LOOKING TOWARDS STERN, PORT ENGINE AT RIGHT, STARBOARD ENGINE AT LEFT, BOTH ARE DIESEL ENGINES, IN BACKGROUND IS STAIRS UP TO CREWS' BERTHING, BEYONE THE STAIRS IS THE DOOR TO AFT ENGINE ROOM & MACHINE SHOP. - U.S. Coast Guard Cutter WHITE HEATH, USGS Integrated Support Command Boston, 427 Commercial Street, Boston, Suffolk County, MA

  5. A method for modeling contact dynamics for automated capture mechanisms

    NASA Technical Reports Server (NTRS)

    Williams, Philip J.

    1991-01-01

    Logicon Control Dynamics develops contact dynamics models for space-based docking and berthing vehicles. The models compute contact forces for the physical contact between mating capture mechanism surfaces. Realistic simulation requires proportionality constants, for calculating contact forces, to approximate surface stiffness of contacting bodies. Proportionality for rigid metallic bodies becomes quite large. Small penetrations of surface boundaries can produce large contact forces.

  6. 77 FR 58531 - Notice of Intent To Prepare a Joint Environmental Impact Statement (EIS) for the Gateway Pacific...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-09-21

    ... approximately 350 acres and would include a three- berth, deep-water wharf. The proposed wharf would be 3,000 feet long and 105 feet wide, with access to suitably deep water provided by an approximately 1,100 foot... and at the Web site www.eisgatewaypacificwa.gov or can be requested by contacting the Corps, Seattle...

  7. Scheduling Jobs with Variable Job Processing Times on Unrelated Parallel Machines

    PubMed Central

    Zhang, Guang-Qian; Wang, Jian-Jun; Liu, Ya-Jing

    2014-01-01

    m unrelated parallel machines scheduling problems with variable job processing times are considered, where the processing time of a job is a function of its position in a sequence, its starting time, and its resource allocation. The objective is to determine the optimal resource allocation and the optimal schedule to minimize a total cost function that dependents on the total completion (waiting) time, the total machine load, the total absolute differences in completion (waiting) times on all machines, and total resource cost. If the number of machines is a given constant number, we propose a polynomial time algorithm to solve the problem. PMID:24982933

  8. Dynamism in a Semiconductor Industrial Machine Allocation Problem using a Hybrid of the Bio-inspired and Musical-Harmony Approach

    NASA Astrophysics Data System (ADS)

    Kalsom Yusof, Umi; Nor Akmal Khalid, Mohd

    2015-05-01

    Semiconductor industries need to constantly adjust to the rapid pace of change in the market. Most manufactured products usually have a very short life cycle. These scenarios imply the need to improve the efficiency of capacity planning, an important aspect of the machine allocation plan known for its complexity. Various studies have been performed to balance productivity and flexibility in the flexible manufacturing system (FMS). Many approaches have been developed by the researchers to determine the suitable balance between exploration (global improvement) and exploitation (local improvement). However, not much work has been focused on the domain of machine allocation problem that considers the effects of machine breakdowns. This paper develops a model to minimize the effect of machine breakdowns, thus increasing the productivity. The objectives are to minimize system unbalance and makespan as well as increase throughput while satisfying the technological constraints such as machine time availability. To examine the effectiveness of the proposed model, results for throughput, system unbalance and makespan on real industrial datasets were performed with applications of intelligence techniques, that is, a hybrid of genetic algorithm and harmony search. The result aims to obtain a feasible solution to the domain problem.

  9. Spectrum Sharing Based on a Bertrand Game in Cognitive Radio Sensor Networks

    PubMed Central

    Zeng, Biqing; Zhang, Chi; Hu, Pianpian; Wang, Shengyu

    2017-01-01

    In the study of power control and allocation based on pricing, the utility of secondary users is usually studied from the perspective of the signal to noise ratio. The study of secondary user utility from the perspective of communication demand can not only promote the secondary users to meet the maximum communication needs, but also to maximize the utilization of spectrum resources, however, research in this area is lacking, so from the viewpoint of meeting the demand of network communication, this paper designs a two stage model to solve spectrum leasing and allocation problem in cognitive radio sensor networks (CRSNs). In the first stage, the secondary base station collects the secondary network communication requirements, and rents spectrum resources from several primary base stations using the Bertrand game to model the transaction behavior of the primary base station and secondary base station. The second stage, the subcarriers and power allocation problem of secondary base stations is defined as a nonlinear programming problem to be solved based on Nash bargaining. The simulation results show that the proposed model can satisfy the communication requirements of each user in a fair and efficient way compared to other spectrum sharing schemes. PMID:28067850

  10. Space Station Freedom resource allocation accommodation of technology payload requirements

    NASA Technical Reports Server (NTRS)

    Avery, Don E.; Collier, Lisa D.; Gartrell, Charles F.

    1990-01-01

    An overview of the Office of Aeronautics, Exploration, and Technology (OAET) Space Station Freedom Technology Payload Development Program is provided, and the OAET Station resource requirements are reviewed. The requirements are contrasted with current proposed resource allocations. A discussion of the issues and conclusions are provided. It is concluded that an overall 20 percent resource allocation is appropriate to support OAET's technology development program, that some resources are inadequate even at the 20 percent level, and that bartering resources among U.S. users and international partners and increasing the level of automation may be viable solutions to the resource constraint problem.

  11. Causes of Indoor Air Quality Problems in Schools: Summary of Scientific Research. Revised Edition.

    ERIC Educational Resources Information Center

    Bayer, Charlene W.; Crow, Sidney A.; Fischer, John

    Understanding the primary causes of indoor air quality (IAQ) problems and how controllable factors--proper heating, ventilation and air-conditioning (HVAC) system design, allocation of adequate outdoor air, proper filtration, effective humidity control, and routine maintenance--can avert problems may help all building owners, operators, and…

  12. Algorithm Optimally Allocates Actuation of a Spacecraft

    NASA Technical Reports Server (NTRS)

    Motaghedi, Shi

    2007-01-01

    A report presents an algorithm that solves the following problem: Allocate the force and/or torque to be exerted by each thruster and reaction-wheel assembly on a spacecraft for best performance, defined as minimizing the error between (1) the total force and torque commanded by the spacecraft control system and (2) the total of forces and torques actually exerted by all the thrusters and reaction wheels. The algorithm incorporates the matrix vector relationship between (1) the total applied force and torque and (2) the individual actuator force and torque values. It takes account of such constraints as lower and upper limits on the force or torque that can be applied by a given actuator. The algorithm divides the aforementioned problem into two optimization problems that it solves sequentially. These problems are of a type, known in the art as semi-definite programming problems, that involve linear matrix inequalities. The algorithm incorporates, as sub-algorithms, prior algorithms that solve such optimization problems very efficiently. The algorithm affords the additional advantage that the solution requires the minimum rate of consumption of fuel for the given best performance.

  13. Optimizing conjunctive use of surface water and groundwater resources with stochastic dynamic programming

    NASA Astrophysics Data System (ADS)

    Davidsen, Claus; Liu, Suxia; Mo, Xingguo; Rosbjerg, Dan; Bauer-Gottwein, Peter

    2014-05-01

    Optimal management of conjunctive use of surface water and groundwater has been attempted with different algorithms in the literature. In this study, a hydro-economic modelling approach to optimize conjunctive use of scarce surface water and groundwater resources under uncertainty is presented. A stochastic dynamic programming (SDP) approach is used to minimize the basin-wide total costs arising from water allocations and water curtailments. Dynamic allocation problems with inclusion of groundwater resources proved to be more complex to solve with SDP than pure surface water allocation problems due to head-dependent pumping costs. These dynamic pumping costs strongly affect the total costs and can lead to non-convexity of the future cost function. The water user groups (agriculture, industry, domestic) are characterized by inelastic demands and fixed water allocation and water supply curtailment costs. As in traditional SDP approaches, one step-ahead sub-problems are solved to find the optimal management at any time knowing the inflow scenario and reservoir/aquifer storage levels. These non-linear sub-problems are solved using a genetic algorithm (GA) that minimizes the sum of the immediate and future costs for given surface water reservoir and groundwater aquifer end storages. The immediate cost is found by solving a simple linear allocation sub-problem, and the future costs are assessed by interpolation in the total cost matrix from the following time step. Total costs for all stages, reservoir states, and inflow scenarios are used as future costs to drive a forward moving simulation under uncertain water availability. The use of a GA to solve the sub-problems is computationally more costly than a traditional SDP approach with linearly interpolated future costs. However, in a two-reservoir system the future cost function would have to be represented by a set of planes, and strict convexity in both the surface water and groundwater dimension cannot be maintained. The optimization framework based on the GA is still computationally feasible and represents a clean and customizable method. The method has been applied to the Ziya River basin, China. The basin is located on the North China Plain and is subject to severe water scarcity, which includes surface water droughts and groundwater over-pumping. The head-dependent groundwater pumping costs will enable assessment of the long-term effects of increased electricity prices on the groundwater pumping. The coupled optimization framework is used to assess realistic alternative development scenarios for the basin. In particular the potential for using electricity pricing policies to reach sustainable groundwater pumping is investigated.

  14. Enhancements and Algorithms for Avionic Information Processing System Design Methodology.

    DTIC Science & Technology

    1982-06-16

    programming algorithm is enhanced by incorporating task precedence constraints and hardware failures. Stochastic network methods are used to analyze...allocations in the presence of random fluctuations. Graph theoretic methods are used to analyze hardware designs, and new designs are constructed with...There, spatial dynamic programming (SDP) was used to solve a static, deterministic software allocation problem. Under the current contract the SDP

  15. A review of alternative approaches to healthcare resource allocation.

    PubMed

    Petrou, S; Wolstenholme, J

    2000-07-01

    The resources available for healthcare are limited compared with demand, if not need, and all healthcare systems, regardless of their financing and organisation, employ mechanisms to ration or prioritise finite healthcare resources. This paper reviews alternative approaches that can be used to allocate healthcare resources. It discusses the problems encountered when allocating healthcare resources according to free market principles. It then proceeds to discuss the advantages and disadvantages of alternative resource allocation approaches that can be applied to public health systems. These include: (i) approaches based on the concept of meeting the needs of the population to maximising its capacity to benefit from interventions; (ii) economic approaches that identify the most efficient allocation of resources with the view of maximising health benefits or other measures of social welfare; (iii) approaches that seek to ration healthcare by age; and (iv) approaches that resolve resource allocation disputes through debate and bargaining. At present, there appears to be no consensus about the relative importance of the potentially conflicting principles that can be used to guide resource allocation decisions. It is concluded that whatever shape tomorrow's health service takes, the requirement to make equitable and efficient use of finite healthcare resources will remain.

  16. Allocating responsibility for environmental risks: A comparative analysis of examples from water governance.

    PubMed

    Doorn, Neelke

    2017-03-01

    The focus of the present study is on the allocation of responsibilities for addressing environmental risks in transboundary water governance. Effective environmental management in transboundary situations requires coordinated and cooperative action among diverse individuals and organizations. Currently, little insight exists on how to foster collective action such that individuals and organizations take the responsibility to address transboundary environmental risks. On the basis of 4 cases of transboundary water governance, it will be shown how certain allocation principles are more likely to encourage cooperative action. The main lesson from these case studies is that the allocation of responsibilities should be seen as a risk distribution problem, including considerations of effectiveness, efficiency, and fairness. Integr Environ Assess Manag 2017;13:371-375. © 2016 SETAC. © 2016 SETAC.

  17. Optimal Resource Allocation under Fair QoS in Multi-tier Server Systems

    NASA Astrophysics Data System (ADS)

    Akai, Hirokazu; Ushio, Toshimitsu; Hayashi, Naoki

    Recent development of network technology realizes multi-tier server systems, where several tiers perform functionally different processing requested by clients. It is an important issue to allocate resources of the systems to clients dynamically based on their current requests. On the other hand, Q-RAM has been proposed for resource allocation in real-time systems. In the server systems, it is important that execution results of all applications requested by clients are the same QoS(quality of service) level. In this paper, we extend Q-RAM to multi-tier server systems and propose a method for optimal resource allocation with fairness of the QoS levels of clients’ requests. We also consider an assignment problem of physical machines to be sleep in each tier sothat the energy consumption is minimized.

  18. Community-aware task allocation for social networked multiagent systems.

    PubMed

    Wang, Wanyuan; Jiang, Yichuan

    2014-09-01

    In this paper, we propose a novel community-aware task allocation model for social networked multiagent systems (SN-MASs), where the agent' cooperation domain is constrained in community and each agent can negotiate only with its intracommunity member agents. Under such community-aware scenarios, we prove that it remains NP-hard to maximize system overall profit. To solve this problem effectively, we present a heuristic algorithm that is composed of three phases: 1) task selection: select the desirable task to be allocated preferentially; 2) allocation to community: allocate the selected task to communities based on a significant task-first heuristics; and 3) allocation to agent: negotiate resources for the selected task based on a nonoverlap agent-first and breadth-first resource negotiation mechanism. Through the theoretical analyses and experiments, the advantages of our presented heuristic algorithm and community-aware task allocation model are validated. 1) Our presented heuristic algorithm performs very closely to the benchmark exponential brute-force optimal algorithm and the network flow-based greedy algorithm in terms of system overall profit in small-scale applications. Moreover, in the large-scale applications, the presented heuristic algorithm achieves approximately the same overall system profit, but significantly reduces the computational load compared with the greedy algorithm. 2) Our presented community-aware task allocation model reduces the system communication cost compared with the previous global-aware task allocation model and improves the system overall profit greatly compared with the previous local neighbor-aware task allocation model.

  19. Optimization of Land Use Suitability for Agriculture Using Integrated Geospatial Model and Genetic Algorithms

    NASA Astrophysics Data System (ADS)

    Mansor, S. B.; Pormanafi, S.; Mahmud, A. R. B.; Pirasteh, S.

    2012-08-01

    In this study, a geospatial model for land use allocation was developed from the view of simulating the biological autonomous adaptability to environment and the infrastructural preference. The model was developed based on multi-agent genetic algorithm. The model was customized to accommodate the constraint set for the study area, namely the resource saving and environmental-friendly. The model was then applied to solve the practical multi-objective spatial optimization allocation problems of land use in the core region of Menderjan Basin in Iran. The first task was to study the dominant crops and economic suitability evaluation of land. Second task was to determine the fitness function for the genetic algorithms. The third objective was to optimize the land use map using economical benefits. The results has indicated that the proposed model has much better performance for solving complex multi-objective spatial optimization allocation problems and it is a promising method for generating land use alternatives for further consideration in spatial decision-making.

  20. Methodologies for optimal resource allocation to the national space program and new space utilizations. Volume 1: Technical description

    NASA Technical Reports Server (NTRS)

    1971-01-01

    The optimal allocation of resources to the national space program over an extended time period requires the solution of a large combinatorial problem in which the program elements are interdependent. The computer model uses an accelerated search technique to solve this problem. The model contains a large number of options selectable by the user to provide flexible input and a broad range of output for use in sensitivity analyses of all entering elements. Examples of these options are budget smoothing under varied appropriation levels, entry of inflation and discount effects, and probabilistic output which provides quantified degrees of certainty that program costs will remain within planned budget. Criteria and related analytic procedures were established for identifying potential new space program directions. Used in combination with the optimal resource allocation model, new space applications can be analyzed in realistic perspective, including the advantage gain from existing space program plant and on-going programs such as the space transportation system.

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