WorldWideScience

Sample records for airport control towers

  1. Visual Features Involving Motion Seen from Airport Control Towers

    Science.gov (United States)

    Ellis, Stephen R.; Liston, Dorion

    2010-01-01

    Visual motion cues are used by tower controllers to support both visual and anticipated separation. Some of these cues are tabulated as part of the overall set of visual features used in towers to separate aircraft. An initial analyses of one motion cue, landing deceleration, is provided as a basis for evaluating how controllers detect and use it for spacing aircraft on or near the surface. Understanding cues like it will help determine if they can be safely used in a remote/virtual tower in which their presentation may be visually degraded.

  2. FAA Air Traffic Control Operations Concepts. Volume 5. ATCT/TCCC (airport Traffic Control Tower/Tower Control Computer Complex) Tower Controllers

    Science.gov (United States)

    1988-07-29

    MANAGEMENI RESIRICTI ".NS FO-DREFF’-ECT ON~ SEQUENCE J AS NECESSARY ’T2.1.1.7 ,I ? c II PROJECT AIRCRAFT/ VEHICLE PLA,"tJD TIME/ P, SITI•lO PRLE LE...REVIEW CURRENT AND R/A TRAFFIC. WEATHER, ALL LOGICAL N/A M H PROJECTED TRAFFIC TRAFFIC MANAGEMENI DISPLAYS STATUS/ WEATHER INFORMATON T3.0.3 MANAGING...STATEMENTS OBJECTS OBJECTS T3.4.1.5 DISCUSS TRAFFIC MANAGEMENI RESTRICTION PROCEDURES NITH CONTROLLER/ PILOT TASK TYPE: VC COORD MEDIA: V FREQUENCY: MED

  3. Virtual and remote control tower research, design, development and validation

    CERN Document Server

    2016-01-01

    The interdisciplinary research and development work carried out in the last ten years which is presented in this book aimed at replacing the conventional airport control tower by a new “remote tower operation” work environment (RTO) which should enhance work efficiency and safety and reduce costs. This revolutionary human–system interface allows for remote aerodrome traffic control without a physical tower building and enables the establishment of remote airport traffic control centers (RTC) of which each may serve several airports from a central location.

  4. 磁控摩擦阻尼器对信号塔的地震反应控制%Seismic Response Control of Airport Towers Using Magnetic Friction Dampers

    Institute of Scientific and Technical Information of China (English)

    罗威; 涂建维

    2016-01-01

    针对常摩擦阻尼器摩擦力恒定的问题,设计一种新型筒式磁控变摩擦阻尼器,并建立磁控变摩擦阻尼器的力学模型。以机场信号塔结构为工程背景,将信号塔的三维空间有限元模型简化为二维串联多自由度模型;采用LQG主动控制算法和界限Hrovat半主动控制策略对磁控变摩擦阻尼器实施控制;讨论常摩擦阻尼器被动控制和磁控摩擦阻尼器半主动控制对地震作用下信号塔结构振动响应的控制效果。计算结果显示,磁控摩擦阻尼器的半主动控制取得明显优于常摩擦阻尼器被动控制的减振效果,在实际工程中有着良好的应用前景。%To cope with the issue of constant slip force of passive friction dampers, a new type barrel electromagnet friction damper was designed. The mechanical models of the passive friction damper and the magnetic friction damper were introduced respectively. With the airport signal tower structure as the research background, a three-dimensional finite element static model was established by means of ANSYS. Then, based on some assumptions, the three-dimensional model was simplified to a series of two-dimensional lumped mass dynamic models. The vibration control effects of the passive friction damper and the magnetic friction damper for the airport signal tower under the earthquake were discussed. Results of this study show that the semi-active control of the magnetic friction damper performs much better than the passive control of the passive friction damper. It may have a good prospect in actual engineering application.

  5. THE REMOTE AND MOBILE AIR TRAFFIC CONTROL TOWER AND ITS POSSIBLE APPLICATION TO THE OPERATIONAL AREA

    Directory of Open Access Journals (Sweden)

    Tímea VAS

    2014-10-01

    Full Text Available The concept of remote and mobile Air Traffic Control Tower (ATC TWR and its development has started in Europe, Australia and also in the USA, in order to improve the efficiency of Air Traffic Management (ATM systems in terms of air transportation safety. These new technologies are applicable in many countries in peace time, but on mobility reasons these are promoted to achieve commitments in the operational area. This article describes the devices and range of equipment of mobile and remote tower, and their specifications, which can even serve a medium sized airport, furthermore examines, whether how can those provide the air traffic services at an operational airfield.

  6. 14 CFR 105.23 - Parachute operations over or onto airports.

    Science.gov (United States)

    2010-01-01

    ... 14 Aeronautics and Space 2 2010-01-01 2010-01-01 false Parachute operations over or onto airports... Parachute operations over or onto airports. No person may conduct a parachute operation, and no pilot in... any airport unless— (a) For airports with an operating control tower: (1) Prior approval has...

  7. Tower Based Load Measurements for Individual Pitch Control and Tower Damping of Wind Turbines

    Science.gov (United States)

    Kumar, A. A.; Hugues-Salas, O.; Savini, B.; Keogh, W.

    2016-09-01

    The cost of IPC has hindered adoption outside of Europe despite significant loading advantages for large wind turbines. In this work we presented a method for applying individual pitch control (including for higher-harmonics) using tower-top strain gauge feedback instead of blade-root strain gauge feedback. Tower-top strain gauges offer hardware savings of approximately 50% in addition to the possibility of easier access for maintenance and installation and requiring a less specialised skill-set than that required for applying strain gauges to composite blade roots. A further advantage is the possibility of using the same tower-top sensor array for tower damping control. This method is made possible by including a second order IPC loop in addition to the tower damping loop to reduce the typically dominating 3P content in tower-top load measurements. High-fidelity Bladed simulations show that the resulting turbine spectral characteristics from tower-top feedback IPC and from the combination of tower-top IPC and damping loops largely match those of blade-root feedback IPC and nacelle- velocity feedback damping. Lifetime weighted fatigue analysis shows that the methods allows load reductions within 2.5% of traditional methods.

  8. FAA Air Traffic Control Operations Concepts. Volume 7. ATCT (Airport Traffic Control Towers) Tower Controllers

    Science.gov (United States)

    1989-04-21

    INFORM PILOT/ OPERATOR V V tF SIIUATION, RETLIJIEU TO NCRMAL j I1.2.4.7 RECEIVE REPORT OF V C [V I; P V 0 ARRl /VEHICLE I AI•NIRMAL I I Y ()o1/I AA/ AI’-8...OBSERVATIONS 2-16 FDA 2- 270- 01 a. At facilities where AT personnel take 2-16 weotner/ visibility observations, use the Federal Meteorological Handbook ...with the ATE Handbook 7110.65. Appendix C. Standard Operuting Practice (SOP) for the Transfer of ... (See 7210.3). FDA 2- 222-- 02 (1) The specialist

  9. Public Safety Transmitter Towers, Public safety towers controlled by the FCC and combined with all other types of towers., Published in 2006, Johnson County AIMS.

    Data.gov (United States)

    NSGIC GIS Inventory (aka Ramona) — This Public Safety Transmitter Towers dataset, was produced all or in part from Other information as of 2006. It is described as 'Public safety towers controlled by...

  10. Z Specification of Gate and Apron Control Management at Airport

    Directory of Open Access Journals (Sweden)

    Nazir Ahmad Zafar

    2014-01-01

    Full Text Available Modelling of an air traffic control (ATC system is an open issue and has become a challenging problem due to its complexity and increase of traffic at airports and in airspace. Consequently, automated ATC systems are suggested to improve efficiency ensuring the safety standards. It is reported that the number of collisions that occurred at airports surface is three times larger than in airspace. Further, it is observed that gates and aprons congestions cause significant delays at airports; hence, effective monitoring and guidance mechanisms are required to control ground air traffic. In this paper, formal procedure of managing air traffic from gate to enter in the active area of airport for taxiing is provided using Z notation. An integration of gate and apron controllers is described to manipulate the information for correct decision making and flow management. Graph theory is used for representation of airport topology and appropriate routs. In static part of the model, safety properties are described in terms of invariants over the critical data types. In dynamic model, the state space is updated by defining pre- and postconditions ensuring the safety. Formal specification is analysed using Z/Eves tool.

  11. 78 FR 31627 - Twenty-Second Meeting: RTCA Special Committee 224, Airport Security Access Control Systems

    Science.gov (United States)

    2013-05-24

    ...: RTCA Special Committee 224, Airport Security Access Control Systems AGENCY: Federal Aviation... 224, Airport Security Access Control Systems. SUMMARY: The FAA is issuing this notice to advise the public of the twenty-second meeting of the RTCA Special Committee 224, Airport Security Access...

  12. Vibration Control of Tower Structure with Multiple Cardan Gyroscopes

    OpenAIRE

    Haoxiang He; Xin Xie; Wentao Wang

    2017-01-01

    Tower structure is sensitive to hurricane and earthquake, and it is easy to generate large deflection and dynamic response. The multiple cardan gyroscope has two rotational degrees of freedom, which can generate strong moments to constrain the two horizontal orthogonal deflections if the rotor operates in high speeds, so the structural dynamic responses can be decreased. Hence, the method of dynamic control of the tower structure under wind load and earthquake action is proposed by using the ...

  13. Usability Evaluation of Spot and Runway Departure Advisor (SARDA) Concept in Dallas/Fort Worth Airport Tower Simulation

    Science.gov (United States)

    Hayashi, Miwa; Hoang, Ty; Jung, Yoon C.; Gupta, Gautam; Malik, Waqar; Dulchinos, Victoria

    2013-01-01

    Spot and Runway Departure Advisor (SARDA) is a proposed decision-support tool for air traffic control tower controllers for reducing taxi delay and optimizing the departure sequence. In the present study, the tool's usability was evaluated to ensure that its claimed performance benefits are not being realized at the cost of increasing the work burden on controllers. For the evaluation, workload ratings and questionnaire responses collected during a human-in-the-loop simulation experiment were analyzed to assess the SARDA advisories' effects on the controllers' ratings on cognitive resources (e.g., workload, spare attention) and satisfaction. The results showed that SARDA reduced the controllers' workload and increased their spare attention. It also made workload and attention levels less susceptible to the effects of increases in the traffic load. The questionnaire responses suggested that the controllers generally were satisfied with the ease of use of the tool and the objectives of the SARDA concept, but with some caution. To gain more trust from controllers, the the reasoning behind advisories may need to be made more transparent to them.

  14. Adaptive Backstepping Control of Lightweight Tower Wind Turbine

    DEFF Research Database (Denmark)

    Galeazzi, Roberto; Borup, Kasper Trolle; Niemann, Hans Henrik;

    2015-01-01

    This paper investigates the feasibility of operating a wind turbine with lightweight tower in the full load region exploiting an adaptive nonlinear controller that allows the turbine to dynamically lean against the wind while maintaining nominal power output. The use of lightweight structures...

  15. Vibration Control of Tower Structure with Multiple Cardan Gyroscopes

    Directory of Open Access Journals (Sweden)

    Haoxiang He

    2017-01-01

    Full Text Available Tower structure is sensitive to hurricane and earthquake, and it is easy to generate large deflection and dynamic response. The multiple cardan gyroscope has two rotational degrees of freedom, which can generate strong moments to constrain the two horizontal orthogonal deflections if the rotor operates in high speeds, so the structural dynamic responses can be decreased. Hence, the method of dynamic control of the tower structure under wind load and earthquake action is proposed by using the multiple cardan gyroscopes as the dampers. The dynamic mechanism and the fixed axis principle of the multiple cardan gyroscope are introduced, and the dynamic equation of the gyroscope is established. The damping mechanism of the gyroscope is also described. For the tower structure equipped with the multiple cardan gyroscope dampers, the multidimensional control equation considering torsion effect is established, and the equivalent state space equation is presented. Taking a TV Tower with a number of gyroscope dampers as an analysis example, the structural dynamic responses and damping performance under fluctuating wind loads and earthquake action is studied. The results show that the multiple cardan gyroscope dampers with suitable parameters can effectively decrease the structural vibration in horizontal directions and torsional direction.

  16. 78 FR 16757 - Twentieth Meeting: RTCA Special Committee 224, Airport Security Access Control Systems

    Science.gov (United States)

    2013-03-18

    ... Control Systems AGENCY: Federal Aviation Administration (FAA), U.S. Department of Transportation (DOT). ACTION: Meeting Notice of RTCA Special Committee 224, Airport Security Access Control Systems. SUMMARY... Committee 224, Airport Security Access Control Systems. DATES: The meeting will be held April 4, 2013 from...

  17. 76 FR 59481 - Ninth Meeting: RTCA Special Committee 224: Airport Security Access Control Systems

    Science.gov (United States)

    2011-09-26

    ... Control Systems AGENCY: Federal Aviation Administration (FAA), DOT. ACTION: Notice of RTCA Special Committee 224 meeting: Airport Security Access Control Systems. SUMMARY: The FAA is issuing this notice to advise the public of a meeting of RTCA Special Committee 224: Airport Security Access Control...

  18. 78 FR 43963 - Twenty-Third Meeting: RTCA Special Committee 224, Airport Security Access Control Systems

    Science.gov (United States)

    2013-07-22

    ... Control Systems AGENCY: Federal Aviation Administration (FAA), U.S. Department of Transportation (DOT). ACTION: Meeting Notice of RTCA Special Committee 224, Airport Security Access Control Systems. SUMMARY... Committee 224, Airport Security Access Control Systems. DATES: The meeting will be held on June 20,...

  19. 77 FR 71474 - Seventeenth Meeting: RTCA Special Committee 224, Airport Security Access Control Systems

    Science.gov (United States)

    2012-11-30

    ... Control Systems AGENCY: Federal Aviation Administration (FAA), U.S. Department of Transportation (DOT). ACTION: Meeting Notice of RTCA Special Committee 224, Airport Security Access Control Systems. SUMMARY... Committee 224, Airport Security Access Control Systems. DATES: The meeting will be held December 13,...

  20. 77 FR 15448 - Twelfth Meeting: RTCA Special Committee 224, Airport Security Access Control Systems

    Science.gov (United States)

    2012-03-15

    ... Control Systems AGENCY: Federal Aviation Administration (FAA), U.S. Department of Transportation (DOT). ACTION: Notice of meeting RTCA Special Committee 224, Airport Security Access Control Systems. SUMMARY... 224, Airport Security Access Control Systems DATES: The meeting will be held April 5, 2012, from 10...

  1. 78 FR 51810 - Twenty-Fourth Meeting: RTCA Special Committee 224, Airport Security Access Control Systems

    Science.gov (United States)

    2013-08-21

    ... Security Access Control Systems AGENCY: Federal Aviation Administration (FAA), U.S. Department of Transportation (DOT). ACTION: Meeting Notice of RTCA Special Committee 224, Airport Security Access Control... RTCA Special Committee 224, Airport Security Access Control Systems. DATES: The meeting will be held...

  2. 78 FR 22025 - Twenty First Meeting: RTCA Special Committee 224, Airport Security Access Control Systems

    Science.gov (United States)

    2013-04-12

    ... Control Systems AGENCY: Federal Aviation Administration (FAA), U.S. Department of Transportation (DOT). ACTION: Meeting Notice of RTCA Special Committee 224, Airport Security Access Control Systems. SUMMARY... Committee 224, Airport Security Access Control Systems. DATES: The meeting will be held April 9-10,...

  3. 76 FR 50811 - Eighth Meeting: RTCA Special Committee 224: Airport Security Access Control Systems

    Science.gov (United States)

    2011-08-16

    ... Access Control Systems AGENCY: Federal Aviation Administration (FAA), DOT. ACTION: Notice of RTCA Special Committee 224 meeting: Airport Security Access Control Systems. SUMMARY: The FAA is issuing this notice to advise the public of a meeting of RTCA Special Committee 224: Airport Security Access Control...

  4. 77 FR 55894 - Fifteenth Meeting: RTCA Special Committee 224, Airport Security Access Control Systems

    Science.gov (United States)

    2012-09-11

    ... Control Systems AGENCY: Federal Aviation Administration (FAA), U.S. Department of Transportation (DOT). ACTION: Meeting Notice of RTCA Special Committee 224, Airport Security Access Control Systems. SUMMARY... Committee 224, Airport Security Access Control Systems DATES: The meeting will be held September 27-28,...

  5. 77 FR 25525 - Thirteenth Meeting: RTCA Special Committee 224, Airport Security Access Control Systems.

    Science.gov (United States)

    2012-04-30

    ... Access Control Systems. AGENCY: Federal Aviation Administration (FAA), U.S. Department of Transportation (DOT). ACTION: Meeting Notice of RTCA Special Committee 224, Airport Security Access Control Systems... Committee 224, Airport Security Access Control Systems DATES: The meeting will be held May 30, 2012, from...

  6. 77 FR 64838 - Sixteenth Meeting: RTCA Special Committee 224, Airport Security Access Control Systems

    Science.gov (United States)

    2012-10-23

    ... Control Systems AGENCY: Federal Aviation Administration (FAA), U.S. Department of Transportation (DOT). ACTION: Meeting Notice of RTCA Special Committee 224, Airport Security Access Control Systems. SUMMARY... Committee 224, Airport Security Access Control Systems. DATES: The meeting will be held November 15,...

  7. 78 FR 7850 - Nineteenth Meeting: RTCA Special Committee 224, Airport Security Access Control Systems

    Science.gov (United States)

    2013-02-04

    ... Control Systems AGENCY: Federal Aviation Administration (FAA), U.S. Department of Transportation (DOT). ACTION: Meeting Notice of RTCA Special Committee 224, Airport Security Access Control Systems. SUMMARY... Committee 224, Airport Security Access Control Systems. DATES: The meeting will be held February 21,...

  8. 77 FR 2343 - Eleventh Meeting: RTCA Special Committee 224, Airport Security Access Control Systems

    Science.gov (United States)

    2012-01-17

    ... Control Systems AGENCY: Federal Aviation Administration (FAA), U.S. Department of Transportation (DOT). ACTION: Notice of RTCA Special Committee 224, Airport Security Access Control Systems. SUMMARY: The FAA..., Airport Security Access Control Systems. DATES: The meeting will be held February 9, 2012, from 10...

  9. Dimensions of Air Traffic Control Tower Information Needs: From Information Requests to Display Design

    Science.gov (United States)

    Durso, Francis T.; Johnson, Brian R.; Crutchfield, Jerry M.

    2010-01-01

    In an effort to determine the information needs of tower air traffic controllers, instructors from the Federal Aviation Administration's Academy in Oklahoma City were asked to control traffic in a high-fidelity tower cab simulator. Information requests were made apparent by eliminating access to standard tower information sources. Instead,…

  10. 76 FR 9632 - Fifth Meeting: RTCA Special Committee 224: Airport Security Access Control Systems

    Science.gov (United States)

    2011-02-18

    ... meeting: Airport Security Access Control Systems (Update to DO-230B). SUMMARY: The FAA is issuing this... Access Control Systems (Update to DO-230B): Agenda March 10, 2011 Welcome/Introductions/Administrative... Federal Aviation Administration Fifth Meeting: RTCA Special Committee 224: Airport Security Access...

  11. 75 FR 61819 - First Meeting: RTCA Special Committee 224: Airport Security Access Control Systems

    Science.gov (United States)

    2010-10-06

    ... meeting: Airport Security Access Control Systems (Update to DO-230B). SUMMARY: The FAA is issuing this... Control Systems (Update to DO-230B): November 2, 2010 Welcome/Introductions/Administrative Remarks Agenda... Federal Aviation Administration First Meeting: RTCA Special Committee 224: Airport Security Access...

  12. 76 FR 16470 - Sixth Meeting: RTCA Special Committee 224: Airport Security Access Control Systems

    Science.gov (United States)

    2011-03-23

    ... meeting: Airport Security Access Control Systems (Update to DO-230B). SUMMARY: The FAA is issuing this... Control Systems (Update to DO-230B): Agenda April 13, 2011 Welcome/Introductions/Administrative Remarks... Federal Aviation Administration Sixth Meeting: RTCA Special Committee 224: Airport Security Access...

  13. 75 FR 80886 - Third Meeting: RTCA Special Committee 224: Airport Security Access Control Systems

    Science.gov (United States)

    2010-12-23

    ... meeting: Airport Security Access Control Systems (Update to DO-230B). SUMMARY: The FAA is issuing this... Control Systems (Update to DO-230B): Agenda January 13, 2011 Welcome/Introductions/Administrative Remarks... Federal Aviation Administration Third Meeting: RTCA Special Committee 224: Airport Security Access...

  14. Input-Output Modeling and Control of the Departure Process of Congested Airports

    Science.gov (United States)

    Pujet, Nicolas; Delcaire, Bertrand; Feron, Eric

    2003-01-01

    A simple queueing model of busy airport departure operations is proposed. This model is calibrated and validated using available runway configuration and traffic data. The model is then used to evaluate preliminary control schemes aimed at alleviating departure traffic congestion on the airport surface. The potential impact of these control strategies on direct operating costs, environmental costs and overall delay is quantified and discussed.

  15. Legionella control in power station cooling towers using oxidising biocides

    Energy Technology Data Exchange (ETDEWEB)

    Sailer, Christian; Rawlinson, Julia; Killeen, Paul [Ecolab PTY LTD, Ascot, WA (Australia)

    2009-02-15

    Power stations have used oxidising biocides such as chlorine or bromine for many years to control microbial growth in their cooling towers. In this paper Ecolab trademark looks at the direct effect halogen concentration has on Legionella populations in order to determine the most effective halogenation rate required to ensure that the site key performance indicator (KPI) of < 100 colony-forming units (cfu) per mL can be maintained. (orig.)

  16. Application of Lead Viscoelastic Dampers to Wind Vibration Control on Big-Span Power Transmission Tower

    Institute of Scientific and Technical Information of China (English)

    LIANG Zheng-ping; LI Li; YIN Peng; DUAN Song-tao

    2008-01-01

    To study the wind vibration response of power transmission tower, the lead viscoelastic dampers (LVDs) were applied to a cup tower. With time history analysis method, the displacement, velocity, acceleration and force response of the tower was calculated and analyzed. The results show that the control effect of lead viscoelastic dampers is very good, and the damping ratio can reach 20% or more when they are applied to the tower head.

  17. Take control of your 802.11n airport network

    CERN Document Server

    Fleishman, Glenn

    2009-01-01

    Make your 802.11n-based AirPort network fast, reliable, and secure! Find real-world advice from Wi-Fi wizard Glenn Fleishman on setting up the 802.11n models of Apple's AirPort Express, AirPort Extreme, and Time Capsule, with full information about the simultaneous dual-band models introduced in early 2009. You'll get help with all the special networking details, such as how to set the best band and channel for your network, use pre-802.11n base stations and clients without hurting performance, set up complex Int

  18. Assessment of Proposed Cab Glass Coating for FAA Control Towers

    Science.gov (United States)

    2015-11-16

    To) Jun 2012 – Jun 2013 4. TITLE AND SUBTITLE Evaluation of Proposed Cab Glass Coating for FAA Control Towers 5a. CONTRACT NUMBER In- House 5b...Lite 2: 12CL N/A C 12"x12"x1 1/2" Insulated; 1/2" STARPHIRE; .060 CLEAR PVB; 1/2" STARPHIRE Bubble Pack Sheet Stuck to Surface N/A D 12...determine if this improvement (if any) degrades over time. Participants: In- house Wright-Patterson personnel and/or FAA-provided “guest

  19. Final Environmental Assessment, Construction and Operation of Air Traffic Control Tower

    Science.gov (United States)

    2008-05-12

    Existing Control Tower Site. Complete demolition of the Control Tower building on the site would produce waste concrete, asphalt , metal, and wood...Construction & Operation of Air Traffic Control Tower 44 May 12, 2008 receptor elements. Workers would wear ear protection, as necessary, for...appear to be achieving their hazardous waste reduction goals. The major areas not meeting goals appear to be abrasive blasting and industrial

  20. ARC Control Tower: A flexible generic distributed job management framework

    Science.gov (United States)

    Nilsen, J. K.; Cameron, D.; Filipčič, A.

    2015-12-01

    While current grid middleware implementations are quite advanced in terms of connecting jobs to resources, their client tools are generally quite minimal and features for managing large sets of jobs are left to the user to implement. The ARC Control Tower (aCT) is a very flexible job management framework that can be run on anything from a single users laptop to a multi-server distributed setup. aCT was originally designed to enable ATLAS jobs to be submitted to the ARC CE. However, with the recent redesign of aCT where the ATLAS specific elements are clearly separated from the ARC job management parts, the control tower can now easily be reused as a flexible generic distributed job manager for other communities. This paper will give a detailed explanation how aCT works as a job management framework and go through the steps needed to create a simple job manager using aCT and show that it can easily manage thousands of jobs.

  1. Closed-loop control for power tower heliostats

    Science.gov (United States)

    Convery, Mark R.

    2011-10-01

    In a Power Tower solar thermal power plant, alignment and control of the heliostats constitutes one of the largest costs of both time and money. This is especially the case in systems where individual heliostats are small (~1m2). I describe a closed-loop control system that generates the required feedback by inducing small mechanical vibrations in the heliostat reflector surface using piezoelectric actuators. These vibrations induce time-dependent changes in the reflected wavefront that can be detected by photosensors surrounding the thermal receiver target. Time and frequency encoding of the vibrations allows identification of a misaligned heliostat from among the thousands in the system. Corrections can then be applied to bring the reflected beam onto the receiver target. This technique can, in principle, control thousands of heliostats simultaneously.Outdoor testing of a small-scale model of this system has confirmed that such a system is effective and can achieve milliradian tracking accuracy. If such a system were implemented in a commercial plant, it could relax the accuracy specification required of the heliostats as well as provide an automated alignment and calibration system. This could significantly reduce the installed cost of the heliostat field.

  2. 76 FR 38742 - Seventh Meeting: RTCA Special Committee 224: Airport Security Access Control Systems

    Science.gov (United States)

    2011-07-01

    ... Control Systems AGENCY: Federal Aviation Administration (FAA), DOT. ACTION: Notice of RTCA Special Committee 224 meeting: Airport Security Access Control Systems (Update to DO-230B). SUMMARY: The FAA is... Access Control Systems. DATES: The meeting will be held July 15, 2011, from 10 a.m. to 1 p.m....

  3. 76 FR 3931 - Fourth Meeting: RTCA Special Committee 224: Airport Security Access Control Systems

    Science.gov (United States)

    2011-01-21

    ... Control Systems AGENCY: Federal Aviation Administration (FAA), DOT. ACTION: Notice of RTCA Special Committee 224 Meeting: Airport Security Access Control Systems (Update to DO-230B). SUMMARY: The FAA is... Access Control Systems. DATES: The meeting will be held February 8, 2011, from 10 a.m. to 5...

  4. 75 FR 71790 - Second Meeting: RTCA Special Committee 224: Airport Security Access Control Systems

    Science.gov (United States)

    2010-11-24

    ... Control Systems AGENCY: Federal Aviation Administration (FAA), DOT. ACTION: Notice of RTCA Special Committee 224 meeting: Airport Security Access Control Systems (Update to DO-230B). SUMMARY: The FAA is... Access Control Systems. DATES: The meeting will be held December 9, 2010, from 10 a.m. to 5...

  5. Measurement and control system for a fuel supply plant at an airport; Kuko kyuyu plant no keisoku seigyo system

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2000-01-10

    Air transportation demand is increasing internationally both for passengers and cargoes. A number of Asian countries intend to have a hub airport for Asia, and moving forward building new airports and expanding the existing airports. In the area of airport fuel supply, Fuji Electric has received an order from the Inchon International Airport Public Corporation of Korea a measurement and control system, and is making adjustments at site now. This system is a high-reliability open system which links the controller (ICS-2000), FOCUS, and a UNIX computer by the information LAN and the control LAN according to Ethernet, and duplicates the control LAN. On the other hand, the system has such functions as control of aircraft fuel from receiving from a pipeline to filling it into a storage tank, control of rotation speed of delivery pumps and control of the number thereof for operation, thus attempting automation of fuel supply to aircraft. (translated by NEDO)

  6. CHEP2015: Dynamic Resource Allocation with arcControlTower

    CERN Document Server

    Filipcic, Andrej; The ATLAS collaboration; Nilsen, Jon Kerr

    2015-01-01

    Distributed computing resources available for high-energy physics research are becoming less dedicated to one type of workflow and researchers’ workloads are increasingly exploiting modern computing technologies such as parallelism. The current pilot job management model used by many experiments relies on static dedicated resources and cannot easily adapt to these changes. The model used for ATLAS in Nordic countries and some other places enables a flexible job management system based on dynamic resources allocation. Rather than a fixed set of resources managed centrally, the model allows resources to be requested on the fly. The ARC Computing Element (ARC-CE) and ARC Control Tower (aCT) are the key components of the model. The aCT requests jobs from the ATLAS job mangement system (Panda) and submits a fully-formed job description to ARC-CEs. ARC-CE can then dynamically request the required resources from the underlying batch system. In this paper we describe the architecture of the model and the experience...

  7. Dynamic Resource Allocation with the arcControlTower

    CERN Document Server

    Filipcic, Andrej; The ATLAS collaboration; Nilsen, Jon Kerr

    2015-01-01

    Distributed computing resources available for high-energy physics research are becoming less dedicated to one type of workflow and researchers’ workloads are increasingly exploiting modern computing technologies such as parallelism. The current pilot job management model used by many experiments relies on static dedicated resources and cannot easily adapt to these changes. The model used for ATLAS in Nordic countries and some other places enables a flexible job management system based on dynamic resources allocation. Rather than a fixed set of resources managed centrally, the model allows resources to be requested on the fly. The ARC Computing Element (ARC-CE) and ARC Control Tower (aCT) are the key components of the model. The aCT requests jobs from the ATLAS job management system (PanDA) and submits a fully-formed job description to ARC-CEs. ARC-CE can then dynamically request the required resources from the underlying batch system. In this paper we describe the architecture of the model and the experienc...

  8. Control of Carbon Nanotube Density and Tower Height in an Array

    Science.gov (United States)

    Delzeit, Lance D. (Inventor); Schipper, John F. (Inventor)

    2010-01-01

    A method for controlling density or tower height of carbon nanotube (CNT) arrays grown in spaced apart first and second regions on a substrate. CNTs having a first density range (or first tower height range) are grown in the first region using a first source temperature range for growth. Subsequently or simultaneously, CNTs having a second density range (or second tower height range), having an average density (or average tower height) in the second region different from the average density (or average tower height) for the first region, are grown in the second region, using supplemental localized hearing for the second region. Application for thermal dissipation and/or dissipation of electrical charge or voltage in an electronic device are discussed.

  9. Virtual Environment Design for Low/Zero Visibility Tower Tools

    Science.gov (United States)

    Reisman, Ron; Farouk, Ahmed; Edwards, Thomas A. (Technical Monitor)

    1998-01-01

    This paper describes prototype software for three-dimensional display of aircraft movement based on realtime radar and other Air Traffic Control (ATC) information. This prototype can be used to develop operational tools for controllers in ATC Towers who cannot view aircraft in low or zero visibility (LZV) weather conditions. The controller could also use the software to arbitrarily reposition his virtual eyepoint to overcome physical obstructions or increase situation awareness. The LZV Tower tool prototype consists of server and client components. The server interfaces to operational ATC radar and communications systems, sending processed data to a client process written in java. This client process runs under Netscape Communicator to provide an interactive perspective display of aircraft in the airport environment. Prototype VRML airport models were derived from 3-D databases used in FAA-certified high fidelity flight-simulators. The web-based design offers potential efficiency increases and decreased costs in the development and deployment of operational LZV Tower tools.

  10. 50 CFR 21.49 - Control order for resident Canada geese at airports and military airfields.

    Science.gov (United States)

    2010-10-01

    ... birds within gun range. (8) Airports and military airfields exercising the privileges granted by this... rails or their habitats; and (v) In California, any control activities of resident Canada geese in areas... avoiding adverse effects to the species or its critical habitat: (A) Birds: Light-footed clapper...

  11. Wind-induced vibration control of long-span power transmission towers

    Institute of Scientific and Technical Information of China (English)

    YIN Peng; LI Li; HU Liang-xia

    2009-01-01

    We investigated wind-induced vibration control of long-span power transmission towers based on a case study of the Jingdongnan-Nanyang-Jingmen 1000 kV transmission line project in P. R. China. The height of the cup tower is 181 m with a ground elevation of 47 m, which makes it a super flexible and wind-sensitive structure. Therefore, we should analyze the wind-resistant capacity of the system. We simulated applicable transverse fluctuating wind velocity field, developed a lead-rubber damper (LRD) for controlling wind-induced vibration of long-span transmission towers, deduced LRD calculation model parameter, and researched the best layout scheme and installation method of LRD. To calculate the wind-induced response of tower-line coupling system in seven layout schemes, we used the time history analysis method, and obtained the efficiencies of wind-induced vibration control. LRD deformation research proved that the damp of all LRDs was efficient under the designed wind velocity when they were laid along the edge of tower heads. We studied the controlling efficiency resulting from only applying stiffness to the tower poles where the dampers used to be laid under the designed wind velocity. The results show that the controlling efficiency was not ideal when the stiffness is increased on the poles only. Therefore, LRD should contribute to both the stiffness and damp of a structure to effectively reduce the dynamic response of a tower-line coupling system under strong winds. We also discussed the controlling efficiency of LRD under static winds. The results show that there was little difference between displacements derived by the finite element time history method and those obtained by static wind method conducted by a design institute. This means the simulation on space relevant wind velocity field was accurate and reasonable.

  12. An RFID-based luggage and passenger tracking system for airport security control applications

    Science.gov (United States)

    Vastianos, George E.; Kyriazanos, Dimitris M.; Kountouriotis, Vassilios I.; Thomopoulos, Stelios C. A.

    2014-06-01

    Market analysis studies of recent years have shown a steady and significant increase in the usage of RFID technology. Key factors for this growth were the decreased costs of passive RFIDs and their improved performance compared to the other identification technologies. Besides the benefits of RFID technologies into the supply chains, warehousing, traditional inventory and asset management applications, RFID has proven itself worth exploiting on experimental, as well as on commercial level in other sectors, such as healthcare, transport and security. In security sector, airport security is one of the biggest challenges. Airports are extremely busy public places and thus prime targets for terrorism, with aircraft, passengers, crew and airport infrastructure all subject to terrorist attacks. Inside this labyrinth of security challenges, the long range detection capability of the UHF passive RFID technology can be turned into a very important tracking tool that may outperform all the limitations of the barcode tracking inside the current airport security control chain. The Integrated Systems Lab of NCSR Demokritos has developed an RFID based Luggage and Passenger tracking system within the TASS (FP7-SEC-2010-241905) EU research project. This paper describes application scenarios of the system categorized according to the structured nature of the environment, the system architecture and presents evaluation results extracted from measurements with a group of different massive production GEN2 UHF RFID tags that are widely available in the world market.

  13. Heart Rate Variability as a Measure of Airport Ramp-Traffic Controllers Workload

    Science.gov (United States)

    Hayashi, Miwa; Dulchinos, Victoria Lee

    2016-01-01

    Heart Rate Variability (HRV) has been reported to reflect the person's cognitive and emotional stress levels, and may offer an objective measure of human-operator's workload levels, which are recorded continuously and unobtrusively to the task performance. The present paper compares the HRV data collected during a human-in-the-loop simulation of airport ramp-traffic control operations with the controller participants' own verbal self-reporting ratings of their workload.

  14. Study on Seismic Control of Power Transmission Tower-Line Coupled System under Multicomponent Excitations

    Directory of Open Access Journals (Sweden)

    Li Tian

    2013-01-01

    Full Text Available The seismic control of power transmission tower-line coupled system subjected to multicomponent excitations is studied in this paper. The schematic of tuned mass damper is introduced, and equations of motion of a system with tuned mass damper under multi-component excitations are proposed. Three-dimensional finite tower-line system models are created based on practical engineering in studying the response of this system without and with control. The time domain analysis takes into account geometric nonlinearity due to finite deformation. The optimal design of the transmission tower-line system with tuned mass damper is obtained according to different mass ratio. The effects of wave travel, coherency loss, and different site conditions on the system without and with control are investigated, respectively.

  15. Lighting and shading control studies at P.E. Trudeau Airport

    Energy Technology Data Exchange (ETDEWEB)

    Tzempelikos, A. [Purdue Univ., West Lafayette, IN (United States). School of Civil Engineering; Athienitis, A.K.; O' Neill, B.; Kapsis, K. [Concordia Univ., Montreal, PQ (Canada). Dept. of Building, Civil and Environmental Engineering

    2009-06-15

    This paper reported on the use of shading and lighting control algorithms at the P.E. Trudeau airport in Montreal. The airport has several perimeter zones with large glazed facades that receive excessive solar gains throughout the year. These facades were shaded by motorized shades operated manually by the airport personnel. As such, the building did not have efficient solar protection and extra air-conditioning was needed. Several light sensors were placed in strategic positions for monitoring the daylighting performance during variable weather conditions. Control algorithms for efficient shading and lighting operation were then developed using correlations between illuminance sensor signals. The sensors were used to monitor interior daylight levels under different sky conditions and shade positions. Reliable correlations were derived between ceiling and work plane illuminance, which were used to develop control schemes for shading and lighting operation. This paper also included simulation results for the potential energy savings due to reduced lighting and cooling energy demand. It was concluded that the shades close and prevent glare while still providing some view to the outdoors. The lighting energy savings will be significant because of the large glass areas and solar exposure throughout the day for all seasons. 9 refs., 3 tabs., 11 figs.

  16. Traffic Control Under Complex Weather Conditions in Suining Airport

    Institute of Scientific and Technical Information of China (English)

    吕维峰

    2014-01-01

    Complex weather conditions is meaning thunderstorm freezing turbulence wind-shear low visibility weather affect the flight safety. When confronted with complex weather conditions,the controllers should know the weather condition and trend weather,and notify the aircraft under your control zone.The controllers provide the required services to the pilots,help the pilots to avoid the complex weather.In this paper, through different complex weathers under different control command,get the different methods of control.

  17. Wind-induced vibration control of Hefei TV tower with fluid viscous damper

    Institute of Scientific and Technical Information of China (English)

    ZHANG Zhiqiang; Aiqun LI; Jianping HE; Jianlei WANG

    2009-01-01

    The Hefei TV tower is taken as an analytical case to examine the control method with a fluid viscous damper under wind load fluctuation. Firstly, according to the random vibration theory, the effect of fluctuating wind on the tower can be modeled as a 19-dimensional correlated random process, and the wind-induced vibration analysis of the tower subjected to dynamic wind load was further obtained. On the basis of the others' works, a bi-model dynamic model is proposed. Finally, a dynamic model is proposed to study the wind-induced vibration control analysis using viscous fluid dampers, and the optimal damping coefficient is obtained regarding the wind-induced response of the upper turret as optimization objectives. Analysis results show that the maximum peak response of the tower under dynamic wind load is far beyond the allowable range of the code. The wind-induced responses and the wind vibration input energy of the tower are decreased greatly by using a fluid viscous damper, and the peak acceleration responses of the upper turret is reduced by 43.4%.

  18. Flue gas injection control of silica in cooling towers.

    Energy Technology Data Exchange (ETDEWEB)

    Brady, Patrick Vane; Anderson, Howard L., Jr.; Altman, Susan Jeanne

    2011-06-01

    Injection of CO{sub 2}-laden flue gas can decrease the potential for silica and calcite scale formation in cooling tower blowdown by lowering solution pH to decrease equilibrium calcite solubility and kinetic rates of silica polymerization. Flue gas injection might best inhibit scale formation in power plant cooling towers that use impaired makeup waters - for example, groundwaters that contain relatively high levels of calcium, alkalinity, and silica. Groundwaters brought to the surface for cooling will degas CO{sub 2} and increase their pH by 1-2 units, possibly precipitating calcite in the process. Recarbonation with flue gas can lower the pHs of these fluids back to roughly their initial pH. Flue gas carbonation probably cannot lower pHs to much below pH 6 because the pHs of impaired waters, once outgassed at the surface, are likely to be relatively alkaline. Silica polymerization to form scale occurs most rapidly at pH {approx} 8.3 at 25 C; polymerization is slower at higher and lower pH. pH 7 fluids containing {approx}220 ppm SiO{sub 2} require > 180 hours equilibration to begin forming scale whereas at pH 8.3 scale formation is complete within 36 hours. Flue gas injection that lowers pHs to {approx} 7 should allow substantially higher concentration factors. Periodic cycling to lower recoveries - hence lower silica concentrations - might be required though. Higher concentration factors enabled by flue gas injection should decrease concentrate volumes and disposal costs by roughly half.

  19. SARDA: An Integrated Concept for Airport Surface Operations Management

    Science.gov (United States)

    Gupta, Gautam; Hoang, Ty; Jung, Yoon Chul

    2013-01-01

    The Spot and Runway Departure Advisor (SARDA) is an integrated decision support tool for airlines and air traffic control tower enabling surface collaborative decision making (CDM) and departure metering in order to enhance efficiency of surface operations at congested airports. The presentation describes the concept and architecture of the SARDA as a CDM tool, and the results from a human-in-the-loop simulation of the tool conducted in 2012 at the FutureFlight Central, the tower simulation facility. Also, presented is the current activities and future plan for SARDA development. The presentation was given at the meeting with the FAA senior advisor of the Surface Operations Office.

  20. A Study of Airports - Design, Art and Architecture

    Science.gov (United States)

    1981-04-01

    area. Large sweeps of blue,parking lots, and other facilities. yellow, and red wildflowers de- Airtrans is a completely auto- signed by artist Chapman...airport, there are large masses of vegetation, strong earth forms, and broad areas of grass and wildflowers . Because of high speed traffic and the large... California 93727 duce confusion to the traveler Two of the exterior walls dis- monitored and have not caused Tower Chief by establishing strict controls

  1. Vibration control of tower of long span suspension bridge; Chodai tsuribashi shuto no seishin gijutsu

    Energy Technology Data Exchange (ETDEWEB)

    Kubota, H.; Miyazaki, M. [Sumitomo Heavy Industries, Ltd., Tokyo (Japan); Sasaki, M. [Bridge and Offshore Engineering Association, Tokyo (Japan); Fumoto, K. [Honshu-Shikoku Bridge Authority, Tokyo (Japan)

    1998-08-20

    This paper describes the vibration control during the erection of 8P main tower of Kurushima-ohashi Bridge. Since the body of tower crane and the crane post were adjacent to the main tower, stability against wind due to the change of separation flow was worried. Response characteristics and design data for the damper were obtained through the wind tunnel tests. Since the vibration characteristics change in each erection step, generation of vortex excitation was examined in various modes. An active mass damper (AMD) was applied to the tower surface radial bending primary vibration, of which natural frequency changes in a wide range at the wind velocity below working limit, and the other vibration modes. A tuned mass damper (TMD) was also used in the mode where large damping energy is required under the high wind velocity and high frequency conditions. For the rolling pendulum type AMD, a servo-motor driving carriage moves on the frame rail, and a restitutive force is obtained with rotating the fan type rolling element pin-supported on the carriage. The natural frequency of AMD can be adjusted by fan shaped plural weight plates. Variable gain type DVFB control was employed, in which displacement and velocity of the damper are used as the control output. Sufficient functions could be obtained. 7 refs., 4 figs., 5 tabs.

  2. Operational Characteristics Identification and Simulation Model Verification for Incheon International Airport

    Science.gov (United States)

    Eun, Yeonju; Jeon, Daekeun; Lee, Hanbong; Zhu, Zhifan; Jung, Yoon C.; Jeong, Myeongsook; Kim, Hyounkyong; Oh, Eunmi; Hong, Sungkwon; Lee, Junwon

    2016-01-01

    Incheon International Airport (ICN) is one of the hub airports in East Asia. Airport operations at ICN have been growing more than 5 percent per year in the past five years. According to the current airport expansion plan, a new passenger terminal will be added and the current cargo ramp will be expanded in 2018. This expansion project will bring 77 new stands without adding a new runway to the airport. Due to such continuous growth in airport operations and future expansion of the ramps, it will be highly likely that airport surface traffic will experience more congestion, and therefore, suffer from efficiency degradation. There is a growing awareness in aviation research community of need for strategic and tactical surface scheduling capabilities for efficient airport surface operations. Specific to ICN airport operations, a need for A-CDM (Airport - Collaborative Decision Making) or S-CDM (Surface - Collaborative Decision Making), and controller decision support tools for efficient air traffic management has arisen since several years ago. In the United States, there has been independent research efforts made by academia, industry, and government research organizations to enhance efficiency and predictability of surface operations at busy airports. Among these research activities, the Spot and Runway Departure Advisor (SARDA) developed and tested by National Aeronautics and Space Administration (NASA) is a decision support tool to provide tactical advisories to the controllers for efficient surface operations. The effectiveness of SARDA concept, was successfully verified through the human-in-the-loop (HITL) simulations for both spot release and runway operations advisories for ATC Tower controllers of Dallas-Fort Worth International Airport (DFW) in 2010 and 2012, and gate pushback advisories for the ramp controller of Charlotte-Douglas International Airport (CLT) in 2014. The SARDA concept for tactical surface scheduling is further enhanced and is being

  3. Shaking table test and numerical analysis of offshore wind turbine tower systems controlled by TLCD

    Science.gov (United States)

    Chen, Jianbing; Liu, Youkun; Bai, Xueyuan

    2015-03-01

    A wind turbine system equipped with a tuned liquid column damper (TLCD) is comprehensively studied via shaking table tests using a 1/13-scaled model. The effects of wind and wave actions are considered by inputting response-equivalent accelerations on the shaking table. The test results show that the control effect of the TLCD system is significant in reducing the responses under both wind-wave equivalent loads and ground motions, but obviously varies for different inputs. Further, a blade-hub-tower integrated numerical model for the wind turbine system is established. The model is capable of considering the rotational effect of blades by combining Kane's equation with the finite element method. The responses of the wind tower equipped with TLCD devices are numerically obtained and compared to the test results, showing that under both controlled and uncontrolled conditions with and without blades' rotation, the corresponding responses exhibit good agreement. This demonstrates that the proposed numerical model performs well in capturing the wind-wave coupled response of the offshore wind turbine systems under control. Both numerical and experimental results show that the TLCD system can significantly reduce the structural response and thus improve the safety and serviceability of the offshore wind turbine tower systems. Additional issues that require further study are discussed.

  4. Dynamics and Control of Lateral Tower Vibrations in Offshore Wind Turbines by Means of Active Generator Torque

    Directory of Open Access Journals (Sweden)

    Zili Zhang

    2014-11-01

    Full Text Available Lateral tower vibrations of offshore wind turbines are normally lightly damped, and large amplitude vibrations induced by wind and wave loads in this direction may significantly shorten the fatigue life of the tower. This paper proposes the modeling and control of lateral tower vibrations in offshore wind turbines using active generator torque. To implement the active control algorithm, both the mechanical and power electronic aspects have been taken into consideration. A 13-degrees-of-freedom aeroelastic wind turbine model with generator and pitch controllers is derived using the Euler–Lagrangian approach. The model displays important features of wind turbines, such as mixed moving frame and fixed frame-defined degrees-of-freedom, couplings of the tower-blade-drivetrain vibrations, as well as aerodynamic damping present in different modes of motions. The load transfer mechanisms from the drivetrain and the generator to the nacelle are derived, and the interaction between the generator torque and the lateral tower vibration are presented in a generalized manner. A three-dimensional rotational sampled turbulence field is generated and applied to the rotor, and the tower is excited by a first order wave load in the lateral direction. Next, a simple active control algorithm is proposed based on active generator torques with feedback from the measured lateral tower vibrations. A full-scale power converter configuration with a cascaded loop control structure is also introduced to produce the feedback control torque in real time. Numerical simulations have been carried out using data calibrated to the referential 5-MW NREL (National Renewable Energy Laboratory offshore wind turbine. Cases of drivetrains with a gearbox and direct drive to the generator are considered using the same time series for the wave and turbulence loadings. Results show that by using active generator torque control, lateral tower vibrations can be significantly mitigated for

  5. The Quality Control Algorithms Used in the Creation of NASA Kennedy Space Center Lightning Protection System Towers Meteorological Database

    Science.gov (United States)

    Orcutt, John M.; Brenton, James C.

    2016-01-01

    An accurate database of meteorological data is essential for designing any aerospace vehicle and for preparing launch commit criteria. Meteorological instrumentation were recently placed on the three Lightning Protection System (LPS) towers at Kennedy Space Center (KSC) launch complex 39B (LC-39B), which provide a unique meteorological dataset existing at the launch complex over an extensive altitude range. Data records of temperature, dew point, relative humidity, wind speed, and wind direction are produced at 40, 78, 116, and 139 m at each tower. The Marshall Space Flight Center Natural Environments Branch (EV44) received an archive that consists of one-minute averaged measurements for the period of record of January 2011 - April 2015. However, before the received database could be used EV44 needed to remove any erroneous data from within the database through a comprehensive quality control (QC) process. The QC process applied to the LPS towers' meteorological data is similar to other QC processes developed by EV44, which were used in the creation of meteorological databases for other towers at KSC. The QC process utilized in this study has been modified specifically for use with the LPS tower database. The QC process first includes a check of each individual sensor. This check includes removing any unrealistic data and checking the temporal consistency of each variable. Next, data from all three sensors at each height are checked against each other, checked against climatology, and checked for sensors that erroneously report a constant value. Then, a vertical consistency check of each variable at each tower is completed. Last, the upwind sensor at each level is selected to minimize the influence of the towers and other structures at LC-39B on the measurements. The selection process for the upwind sensor implemented a study of tower-induced turbulence. This paper describes in detail the QC process, QC results, and the attributes of the LPS towers meteorological

  6. Reuso de efluentes em torres de resfriamento - estudo conceitual: Aeroporto Internacional do Rio de Janeiro = Water reuse for cooling towers – conceptual study: Rio de Janeiro International Airport

    Directory of Open Access Journals (Sweden)

    Denize Dias de Carvalho

    2010-07-01

    Full Text Available O reuso de água é ferramenta valiosa na gestão da água, que promove a otimização da utilização do recurso desta, que reduz e, muitas vezes, até elimina os impactos no meio ambiente. Neste trabalho foi investigada a composição do efluente secundário da estação de tratamento de efluentes (ETE APOIO do Aeroporto Internacional do Rio de Janeiro, com o objetivo de propor o processo adequado à reutilização deste efluente como água de reposição nas torres de resfriamento desse Aeroporto. Com base nas análises de cátions, ânions, DBO e DQO, verificou-se o parâmetro SDT - Cl- como crítico para processamento do efluente. Foi proposta uma sequência para reutilização do efluente que continha o tratamento de osmose inversa, o custo do m3 produzido por essa sequência foi estimado em R$ 2,90 m-3. Water reuse is an important tool in water management; it is a conceptthat promotes optimization of the water resource, reducing and often even eliminating environmental impacts. In this work, the composition of a secondary effluent (from the effluent treatment station (ETE APOIO at Rio de Janeiro International Airport was analyzed, with theaim of determining an adequate process for the reutilization of this effluent as replacement cooling water. Chemical analyses such as cation and anion analysis, BOD and COD were performed. Based on these analyses, it was found that TDS - Cl- was the critical parameter foreffluent processing. A treatment system was proposed for effluent reuse including reverse osmosis; the cost estimate per m3 produced by this system was R$ 2.90 m-3.

  7. Airport Heterotopia

    DEFF Research Database (Denmark)

    Christiansen, Steen Ledet

    Airports are areas of transit, places of in-between-ness where mobility is key; airports function not just as transfer points where people are moved from one place to another, but also as areas where mobile technology is critically important to make sure that travellers can stay connected....... The airport serves as a node in the network of flows that is air travel. Airports orchestrate social life into distinct movements and behaviors. The ontology of the airport is peculiarly split between a sense of placelessness, while at the same time being a place of material organization and social complexity....... It is a system of interconnected material worlds, and thus a heterotopia; a blending space of overlapping ontologies. Ursula Le Guin playfully examines this concept of overlapping ontologies in her short story collection Changing Planes, where airport travellers can shift realities due to the unpleasantries...

  8. Virtual Tower

    Energy Technology Data Exchange (ETDEWEB)

    Wayne, R.A. [Sandia National Labs., Albuquerque, NM (United States). Security Engineering Dept.

    1997-08-01

    The primary responsibility of an intrusion detection system (IDS) operator is to monitor the system, assess alarms, and summon and coordinate the response team when a threat is acknowledged. The tools currently provided to the operator are somewhat limited: monitors must be switched, keystrokes must be entered to call up intrusion sensor data, and communication with the response force must be maintained. The Virtual tower is an operator interface assembled from low-cost commercial-off-the-shelf hardware and software; it enables large amounts of data to be displayed in a virtual manner that provides instant recognition for the operator and increases assessment accuracy in alarm annunciator and control systems. This is accomplished by correlating and fusing the data into a 360-degree visual representation that employs color, auxiliary attributes, video, and directional audio to prompt the operator. The Virtual Tower would be a valuable low-cost enhancement to existing systems.

  9. Airport Casualties: Non-Admission and Return Risks at Times of Internalized/Externalized Border Controls

    Directory of Open Access Journals (Sweden)

    Maybritt Jill Alpes

    2015-09-01

    Full Text Available This article analyzes what can happen to forced returnees upon arrival in their country of nationality. Subjective configurations of state agents in the Global South have created return risks, which in turn transform subjectivities of post-colonial citizens. The article contributes to this Special Issue by tracing repercussions of the externalization and internalization of border controls. In the case of Cameroon, these connections have resulted in the criminalization of emigration. Aspiring migrants are prosecuted if their departure projects fail to respect the entry requirements of countries in the Global North. The article is based on research conducted in Douala, Cameroon, in the form of discussions with control agents at the international airport, investigations at a prison, a review of related case law, police registers and interviews with Cameroonians returnees (November 2013–January 2014. Border controls and connected anti-fraud programs suppress family-based forms of solidarity and allow only for subjectivities rooted in state-managed forms of national identity. The article illustrates how efforts to combat fraud fuel corruption in returnees’ social networks, whereby, instead of receiving remittances, families in emigration countries have to mobilize financial resources in order to liberate returnees from police stations or prison complexes. Migration related detention of nationals in the Global South highlights the growing significance of exit controls in migration management.

  10. Wireless Channel Characterization: Modeling the 5 GHz Microwave Landing System Extension Band for Future Airport Surface Communications

    Science.gov (United States)

    Matolak, D. W.; Apaza, Rafael; Foore, Lawrence R.

    2006-01-01

    We describe a recently completed wideband wireless channel characterization project for the 5 GHz Microwave Landing System (MLS) extension band, for airport surface areas. This work included mobile measurements at large and small airports, and fixed point-to-point measurements. Mobile measurements were made via transmission from the air traffic control tower (ATCT), or from an airport field site (AFS), to a receiving ground vehicle on the airport surface. The point-to-point measurements were between ATCT and AFSs. Detailed statistical channel models were developed from all these measurements. Measured quantities include propagation path loss and power delay profiles, from which we obtain delay spreads, frequency domain correlation (coherence bandwidths), fading amplitude statistics, and channel parameter correlations. In this paper we review the project motivation, measurement coordination, and illustrate measurement results. Example channel modeling results for several propagation conditions are also provided, highlighting new findings.

  11. Improving the airport operation and environmental quality at small airports in indonesia

    Directory of Open Access Journals (Sweden)

    Sakti Adji Adisasmita

    2011-12-01

    Full Text Available The study purpose is to strengthen the policy and supervision of airport operation and improve the airport environmental quality to face Green Airport in the near future. The data used are primary and secondary data. The primary data is based on field survey, interview and questionnaires, while secondary data is based on data collected from various agencies. In general, the conclusions are as follows: i the study results show that the airport operator has given enough attention to the environmental management. With good environmental management, airport operator will find comfort in operating the airport such that airports could improve the operation and environmental quality control system; ii the concept of green airport can be a reference to the the airport operator such that the airport activities does not negatively impact to the environment; and iii the implementation of Green Airport concept will improve the quality of environment; and iv the application of green airport concept will reduce the costs of environmental management. The recommendations are i improve strategy and airport development in facing the green airport for the future challenges; and ii airport development plan should noticed since the beginning of airport planned/developed so as to facilitate for the availability airport land expansion, permits, changes in traffic patterns, aircraft technology and implementation of environmental management aspect.

  12. Tower Camera

    Data.gov (United States)

    Oak Ridge National Laboratory — The tower camera in Barrow provides hourly images of ground surrounding the tower. These images may be used to determine fractional snow cover as winter arrives, for...

  13. Airport Logistics : Modeling and Optimizing the Turn-Around Process

    OpenAIRE

    Norin, Anna

    2008-01-01

    The focus of this licentiate thesis is air transportation and especially the logistics at an airport. The concept of airport logistics is investigated based on the following definition: Airport logistics is the planning and control of all resources and information that create a value for the customers utilizing the airport. As a part of the investigation, indicators for airport performance are considered. One of the most complex airport processes is the turn-around process. The turn-around is...

  14. Public Airports

    Data.gov (United States)

    Earth Data Analysis Center, University of New Mexico — This data set is a vector point digital data structure that contains the locations of General Public Use Airports in the State of New Mexico. It only contains those...

  15. Technical research on control of caisson construction for the middle tower foundation of Taizhou Bridge

    Institute of Scientific and Technical Information of China (English)

    Liu Jianbo; Yang Yanhua; Zhang Yongtao; Du Song

    2011-01-01

    The real-time informational monitoring system is adopted in the construction of middle tower foundation of Taizhou Bridge for the first time. The geometric state of the caisson, the stress of upstream and downstream anchorage cables, underwater topography, the drag forces of the caisson cutting edge and frictional resistances of the sidewall and etc. are monitored in real time. According to the synthesized data analysis and decision-making system, the spatial states of the caisson are adjusted in time to locate and embed the deep water caisson precisely. The offset error of the caisson is less than 30 cm and the vertical error is 1/363 at the final stage. The control technology for construction of large caisson under deep water is concluded and would be helpful for the construction of bridge foundation in the future.

  16. Wind tower service lift

    Science.gov (United States)

    Oliphant, David; Quilter, Jared; Andersen, Todd; Conroy, Thomas

    2011-09-13

    An apparatus used for maintaining a wind tower structure wherein the wind tower structure may have a plurality of legs and may be configured to support a wind turbine above the ground in a better position to interface with winds. The lift structure may be configured for carrying objects and have a guide system and drive system for mechanically communicating with a primary cable, rail or other first elongate member attached to the wind tower structure. The drive system and guide system may transmit forces that move the lift relative to the cable and thereby relative to the wind tower structure. A control interface may be included for controlling the amount and direction of the power into the guide system and drive system thereby causing the guide system and drive system to move the lift relative to said first elongate member such that said lift moves relative to said wind tower structure.

  17. An evaluation of fish behavior upstream of the water temperature control tower at Cougar Dam, Oregon, using acoustic cameras, 2013

    Science.gov (United States)

    Adams, Noah S.; Smith, Collin; Plumb, John M.; Hansen, Gabriel S.; Beeman, John W.

    2015-07-06

    This report describes the initial year of a 2-year study to determine the feasibility of using acoustic cameras to monitor fish movements to help inform decisions about fish passage at Cougar Dam near Springfield, Oregon. Specifically, we used acoustic cameras to measure fish presence, travel speed, and direction adjacent to the water temperature control tower in the forebay of Cougar Dam during the spring (May, June, and July) and fall (September, October, and November) of 2013. Cougar Dam is a high-head flood-control dam, and the water temperature control tower enables depth-specific water withdrawals to facilitate adjustment of water temperatures released downstream of the dam. The acoustic cameras were positioned at the upstream entrance of the tower to monitor free-ranging subyearling and yearling-size juvenile Chinook salmon (Oncorhynchus tshawytscha). Because of the large size discrepancy, we could distinguish juvenile Chinook salmon from their predators, which enabled us to measure predators and prey in areas adjacent to the entrance of the tower. We used linear models to quantify and assess operational and environmental factors—such as time of day, discharge, and water temperature—that may influence juvenile Chinook salmon movements within the beam of the acoustic cameras. Although extensive milling behavior of fish near the structure may have masked directed movement of fish and added unpredictability to fish movement models, the acoustic-camera technology enabled us to ascertain the general behavior of discrete size classes of fish. Fish travel speed, direction of travel, and counts of fish moving toward the water temperature control tower primarily were influenced by the amount of water being discharged through the dam.

  18. Heraklion Airport

    DEFF Research Database (Denmark)

    Frigaard, Peter

    Heraklion City is located on Crete Island, Grece with a population of 150000. In the project for extension of the airport at Heraklion, part of the runway is placed in the sea. The runway must be designed to resist attack from the waves. the observed wave and wind data in the period of 1949...

  19. Water tower

    CERN Multimedia

    1970-01-01

    The water tower, being built on the highest point of the site, 460.5 m above the sea level. The tank will hold 750 m3 of water, and the tower will be topped by a knob which can serve as a geological survey reference mark.

  20. Pilot-scale cooling tower to evaluate corrosion, scaling, and biofouling control strategies for cooling system makeup water.

    Science.gov (United States)

    Chien, S H; Hsieh, M K; Li, H; Monnell, J; Dzombak, D; Vidic, R

    2012-02-01

    Pilot-scale cooling towers can be used to evaluate corrosion, scaling, and biofouling control strategies when using particular cooling system makeup water and particular operating conditions. To study the potential for using a number of different impaired waters as makeup water, a pilot-scale system capable of generating 27,000 kJ∕h heat load and maintaining recirculating water flow with a Reynolds number of 1.92 × 10(4) was designed to study these critical processes under conditions that are similar to full-scale systems. The pilot-scale cooling tower was equipped with an automatic makeup water control system, automatic blowdown control system, semi-automatic biocide feeding system, and corrosion, scaling, and biofouling monitoring systems. Observed operational data revealed that the major operating parameters, including temperature change (6.6 °C), cycles of concentration (N = 4.6), water flow velocity (0.66 m∕s), and air mass velocity (3660 kg∕h m(2)), were controlled quite well for an extended period of time (up to 2 months). Overall, the performance of the pilot-scale cooling towers using treated municipal wastewater was shown to be suitable to study critical processes (corrosion, scaling, biofouling) and evaluate cooling water management strategies for makeup waters of complex quality.

  1. The Quality Control Algorithms Used in the Process of Creating the NASA Kennedy Space Center Lightning Protection System Towers Meteorological Database

    Science.gov (United States)

    Orcutt, John M.; Brenton, James C.

    2016-01-01

    The methodology and the results of the quality control (QC) process of the meteorological data from the Lightning Protection System (LPS) towers located at Kennedy Space Center (KSC) launch complex 39B (LC-39B) are documented in this paper. Meteorological data are used to design a launch vehicle, determine operational constraints, and to apply defined constraints on day-of-launch (DOL). In order to properly accomplish these tasks, a representative climatological database of meteorological records is needed because the database needs to represent the climate the vehicle will encounter. Numerous meteorological measurement towers exist at KSC; however, the engineering tasks need measurements at specific heights, some of which can only be provided by a few towers. Other than the LPS towers, Tower 313 is the only tower that provides observations up to 150 m. This tower is located approximately 3.5 km from LC-39B. In addition, data need to be QC'ed to remove erroneous reports that could pollute the results of an engineering analysis, mislead the development of operational constraints, or provide a false image of the atmosphere at the tower's location.

  2. ARRA FEMP Technical Assistance -- Federal Aviation Administration Project 209 -- Control Tower and Support Building, Palm Springs, CA

    Energy Technology Data Exchange (ETDEWEB)

    Arends, J.; Sandusky, William F.

    2010-03-31

    This report represents findings of a design review team that evaluated construction documents (at the 100% level) and operating specifications for a new control tower and support building that will be built in Palm Springs, California by the Federal Aviation Administration (FAA). The focus of the review was to identify measures that could be incorporated into the final design and operating specifications that would result in additional energy savings for the FAA that would not have otherwise occurred.

  3. Demolition technique of high thin-wall hyperbolic reinforced concrete cool tower by directional controlled blasting

    Institute of Scientific and Technical Information of China (English)

    Luo Yong; Cui Xiaorong; Lu Hua

    2008-01-01

    Based on blasting demolition of high thin-wall hyperbolic reinforced concrete cool tower,by virtue of engi-neering practice of blasting the tube concrete structures,the analysis and research were made on the mechanism of cool tower collapse through selecting blasting parameters and selecting gap form,gap size and gap angle.The cool tower was twisted,collapsed directionally and broken weU according to the design requirements.The expected results and purpo-ses of blasting were obtained with no back blow,total blasted pile approximates to 4 ~ 5 m,no occurrence of flying stones and no damage to fixed buildings and equipment,the large-sized hyperbolic thin-wall reinforced concrete cool towers are twisted during blasting and it collapses well with good breaking.The test and measurement of blasting vibra-ting velocity was carried out during blasting and the measuring results are much less than critical values specified by Safety Regulations for Blasting.The study shows that gap form,gap size and gap angle are the key factors to cool tower collapse and will give beneficial references to related theoretical study and field application.

  4. The strategic control of gaze direction in the Tower-of-London task.

    Science.gov (United States)

    Hodgson, T L; Bajwa, A; Owen, A M; Kennard, C

    2000-09-01

    In this paper, we describe a novel approach to the study of problem solving involving the detailed analysis of natural scanning eye movements during the "one-touch" Tower-of-London (TOL) task. We showed subjects a series of pictures depicting two arrangements of colored balls in pockets within the upper and lower halves of a computer display. The task was to plan (but not to execute) the shortest movement sequence required to rearrange the balls in one half of the display (the Workspace) to match the arrangement in the opposite half (the Goalspace) and indicate the minimum number of moves required for problem solution. We report that subjects are more likely to look towards the Goalspace in the initial period after picture presentation, but bias gaze towards the Workspace during the middle of trials. Towards the end of a trial, subjects are once again more likely to fixate the Goalspace. This pattern is found regardless of whether the subjects solve problems by rearranging the balls in the lower or upper visual fields, demonstrating that this strategy correlates with discrete phases in problem solving. A second experiment showed that efficient planners direct their gaze selectively towards the problem critical balls in the Workspace. In contrast, individuals who make errors spend more time looking at irrelevant items and are strongly influenced by the movement strategy needed to solve the preceding problem. We conclude that efficient solution of the TOL requires the capacity to generate and flexibly shift between control sets, including those underlying ocular scanning. The role of working memory and the prefrontal cerebral cortex in the task are discussed.

  5. Virtueller Tower

    OpenAIRE

    Fürstenau, Norbert

    2006-01-01

    Es wird ein Überblick über den Stand der Forschung und Entwicklung zum Remote Tower Experimentalsystem gegeben, des im Rahmen des DLR-Projekts RapTOr am Forschungsflughafen Braunschweig aufgebaut wird.

  6. Control of Wind-Induced Vibration of Transmission Tower-Line System by Using a Spring Pendulum

    Directory of Open Access Journals (Sweden)

    Peng Zhang

    2015-01-01

    Full Text Available The high-voltage power transmission tower-line system, which is a high flexible structure, is very susceptible to the wind-induced vibrations. This paper proposes the utilization of the internal resonance feature of the spring pendulum to reduce the wind-induced vibration of a transmission tower. The kinetic expression of the spring pendulum system is obtained through Lagrangian equation. The condition of the internal resonance is verified to be λ = 2, in which λ is the ratio of the spring mode frequency over the pendulum mode frequency. A 55 m tower in the Liaoning province is established in SAP2000 to numerically verify the effectiveness of the proposed device. The spring pendulum is modeled using Link element. The wind speed history is generated based on Kaimal spectrum using harmonic superposition method. Results show that, (1 compared with the suspended mass pendulum, the spring pendulum absorbs more energy and reduces the oscillation more effectively and (2 the vibration control performance of the proposed spring pendulum improves as the external wind load increases.

  7. Airport Configuration Prediction Project

    Data.gov (United States)

    National Aeronautics and Space Administration — Airport configuration is a primary factor in various airport characteristics such as arrival and departure capacities and terminal area traffic patterns. These...

  8. Airports Geographic Information System -

    Data.gov (United States)

    Department of Transportation — The Airports Geographic Information System maintains the airport and aeronautical data required to meet the demands of the Next Generation National Airspace System....

  9. Noise control of counterflow cooling towers%逆流式冷却塔的噪声治理

    Institute of Scientific and Technical Information of China (English)

    费朝阳; 陈长征; 周勃

    2011-01-01

    根据逆流式冷却塔辐射噪声的实测频谱图,分析了冷却塔的主要噪声来源和频谱特征.分别从吸声、消声和隔声等方面制定了降噪方案,取得了良好的降噪效果.%Based on the measured radiation noise frequency spectrogram, analyses the main noise source and noise spectrum characteristics of cooling tower.Makes a noise control scheme from the aspects of sound absorption, attenuation and insulation.The effect of the noise control is satisfactory.

  10. The infrared-based early warning system for bird strike prevention at Frankfurt airport

    Science.gov (United States)

    Münzberg, M.; Schilling, A.; Schlemmer, H.; Vogel, H.; Cramer, H.; Schlosshauer, J.

    2011-06-01

    Flocks of migratory birds are very often using geographic structures like rivers, valleys or coast lines for orientation. Wherever the preferred migration routes are crossing the approach corridor of an airport there is an increased risk of bird strike. Flocks of birds crossing the runway corridor of the new runway Northwest of the Frankfurt airport are kept under surveillance now with in total three watch towers located at the river Main which in this case is the preferred used line of orientation. Each of the watch towers carries an early warning system which consists of two pairs of stereoscopic thermal imaging cameras sensitive in the mid wavelength infrared range (3 - 5 μm). A stereoscopic pair measures the swarm size, direction of flight and velocity in real time and with high accuracy. From these results an early warning is derived under all relevant weather conditions. The fixed focus thermal imaging cameras are thermally compensated and designed for ultra low image distortion. Each stereoscopic pair is aligned in the sub-pixel range and is controlled by a reference beam to ensure that the alignment is preserved under all environmental conditions and over a very long time. The technical concept is discussed and the design of the realized warning system at the Frankfurt airport is presented.

  11. Surface-Tolerant Coatings for Aircraft Hangars, Flight Control Tower, and Deluge Tanks at Fort Campbell

    Science.gov (United States)

    2007-06-01

    Tower, and Deluge Tanks at Fort Campbell Final Report on Project AR-F-320 for FY05 L.D. Stephenson and Ashok Kumar Construction Engineering Research...eliminate mildew. The cleaning solution is applied and the surface is scrubbed with an abrasive pad such as 3M Scotch-Brite or other nonwoven ...equipped with nonwoven abrasive pads (e.g., 3M Clean-n-Strip) are well suited for cleaning broad flat areas. Two levels of cleanliness may be

  12. Controls on permafrost thaw in a coupled groundwater-flow and heat-transport system: Iqaluit Airport, Nunavut, Canada

    Science.gov (United States)

    Shojae Ghias, Masoumeh; Therrien, René; Molson, John; Lemieux, Jean-Michel

    2016-12-01

    Numerical simulations of groundwater flow and heat transport are used to provide insight into the interaction between shallow groundwater flow and thermal dynamics related to permafrost thaw and thaw settlement at the Iqaluit Airport taxiway, Nunavut, Canada. A conceptual model is first developed for the site and a corresponding two-dimensional numerical model is calibrated to the observed ground temperatures. Future climate-warming impacts on the thermal regime and flow system are then simulated based on climate scenarios proposed by the Intergovernmental Panel on Climate Change (IPCC). Under climate warming, surface snow cover is identified as the leading factor affecting permafrost degradation, including its role in increasing the sensitivity of permafrost degradation to changes in various hydrogeological factors. In this case, advective heat transport plays a relatively minor, but non-negligible, role compared to conductive heat transport, due to the significant extent of low-permeability soil close to surface. Conductive heat transport, which is strongly affected by the surface snow layer, controls the release of unfrozen water and the depth of the active layer as well as the magnitude of thaw settlement and frost heave. Under the warmest climate-warming scenario with an average annual temperature increase of 3.23 °C for the period of 2011-2100, the simulations suggest that the maximum depth of the active layer will increase from 2 m in 2012 to 8.8 m in 2100 and, over the same time period, thaw settlement along the airport taxiway will increase from 0.11 m to at least 0.17 m.

  13. Adaptive Airport Strategic Planning

    NARCIS (Netherlands)

    Kwakkel, J.H.; Walker, W.E.; Marchau, V.A.W.J.

    2010-01-01

    Airport Strategic Planning (ASP) focuses on the development of plans for the long-term development of an airport. The dominant approach for ASP is Airport Master Planning (AMP). The goal of AMP is to provide a detailed blueprint for how the airport should look in the future, and how it can get there

  14. Airport Project Goes Smoothly

    Institute of Scientific and Technical Information of China (English)

    2006-01-01

    <正>The Shanghai Airport Group Company has set up a headquarters to command a project to refurbish Pudong and Hongqiao airports. Construction on Pudong Airport will be completed by the end of 2007, while that on Hongqiao Airport will be finished by the end of 2009.

  15. Airport technology international 1993

    Science.gov (United States)

    Papagiorcopulo, George

    The present survey of developments in airport technologies and their management discusses airport extensions and upgradings, airport developments in China, polluter penalization, airport effects on environments, European ground-handling methods, ATC in Europe, EC duty-free sales at airports, and the privatization of airport security. Also discussed are airport advertising, new alternatives in air-cargo handling, ATC training, taxi-guidance systems, and the reduction of fuel consumption and emissions on the ground. (No individual items are abstracted in this volume)

  16. 国外控制机场飞机噪声影响的措施%Noise Impact Control Measures of Aircrafts in Foreign Airports

    Institute of Scientific and Technical Information of China (English)

    尹建坤; 赵仁兴; 田瑞丽; 马丽霞

    2015-01-01

    介绍了国外机场控制飞机噪声影响的主要做法。国际民航组织发行的《飞机噪声管理的平衡做法指导》主要是从减少噪声源,土地使用规划和管理,减噪运行程序和运行限制等方面控制噪声污染。美国采取的控制措施主要有做好航空规划和城市规划的协调发展,根据机场周边敏感点情况设计影响居民较少的飞行程序,并给出了机场噪声控制措施汇总。欧盟采取的控制措施是建立安静的空中交通系统,技术上需要有安静的飞机,低噪声程序和社会影响管理等。举例说明了目前国外几个机场采取的降噪措施。结合国外机场飞机噪声控制措施,提出了适合我国的飞机噪声控制措施建议。%The main approaches to control the impact of aircraft noise in foreign airports were introduced. The“Bal-ance approach guidance for aircraft noise management”by ICAO has provided the approaches for noise pollution control in the aspects of noise source reduction, land-use planning and management, noise abatement operational procedures and opera-tion restrictions, etc. In the United States, the main control measures are the balancing between aviation development plan-ning and urban development planning, designing the flight procedures with less affect on residents according to the distribu-tion of sensitive points around the airport, and summarizing the airport noise control measures. Control measure by the EU is to establish a quiet air traffic system, including the use of technically quiet aircrafts, low-noise flight procedures and social impact management. The noise reduction measures currently used by several foreign airports were illustrated. Summarizing the aircraft noise control measures in foreign airports, some aircraft noise control measures for domestic airports were sug-gested.

  17. 77 FR 68196 - Orders Limiting Operations at John F. Kennedy International Airport, LaGuardia Airport, and...

    Science.gov (United States)

    2012-11-15

    ... CFR 93.227 (DCA); 74 FR 51648 (Oct. 7, 2009) (EWR); 74 FR 51650 (Oct. 7, 2009) (JFK); 77 FR 30585 (May... Authorizations (slots) at John F. Kennedy International Airport (JFK), LaGuardia Airport (LGA), and Newark... occurred at slot-controlled and non- slot-controlled airports. JFK and EWR were effectively closed...

  18. 76 FR 27743 - Notice of Availability of a Draft Environmental Assessment for a Proposed Airport Traffic Control...

    Science.gov (United States)

    2011-05-12

    ... visibility and improve safety of airport movement areas, have the capability to meet existing and future...-day public comment period at the following libraries: Champaign Public Library, 200 W Green...

  19. Airport noise and teratogenesis

    Energy Technology Data Exchange (ETDEWEB)

    Edmonds, L.D.; Layde, P.M.; Erickson, J.D.

    1979-07-01

    It has been suggested that exposure to high-noise levels near major airports may cause increased incidence of birth defects in the offspring of parents residing near these airports. Using data gathered in Metropolitan Atlanta during 1970 to 1972, we compared the rates of seventeen categories of defects in high- and low-noise census tracts. No significant differences were observed. However, when we subdivided the category of central nervous system defects into several subcategories of specific defects, we noted a significantly increased incidence of spina bifida without hydrocephalus in the high-noise areas. Because of the small number of cases associated with this finding we did a matched case-control study using all cases of central nervous system defects born during the years 1968 to 1976. No significantly increased risk for residents in the high-noise areas was noted in this study. It is our opinion that noise or other factors associated with residence near airports are unlikely to be important environmental teratogens.

  20. CYBER SECURITY FOR AIRPORTS

    Directory of Open Access Journals (Sweden)

    Kasthurirangan Gopalakrishnan

    2013-12-01

    Full Text Available In today’s information age, government organizations and business enterprises are heavily relying on interconnected computer systems to manage a variety of public services including energy, transportation, water, etc. While this increased connectivity has many operational advantages benefitting the public, they have also become vulnerable to cyber attacks such as Corporate Security Breaches, Spear Phishing, and Social Media Fraud. The aviation sector is one the critical infrastructure systems that is not only vulnerable to physical threats, but also cyber threats, especially with the increased use of Bring Your Own Device (BYOD at airports. It has been recognized that there is currently no cyber security standards established for airports in the United States as the existing standards have mainly focused on aircraft Control System (CS. This paper summarizes the need, background, ongoing developments and research efforts with respect to the establishment of cyber-security standards and best practices at U.S. airports with special emphasis on cyber security education and literacy.

  1. Monte Carlo Analysis of Airport Throughput and Traffic Delays Using Self Separation Procedures

    Science.gov (United States)

    Consiglio, Maria C.; Sturdy, James L.

    2006-01-01

    This paper presents the results of three simulation studies of throughput and delay times of arrival and departure operations performed at non-towered, non-radar airports using self-separation procedures. The studies were conducted as part of the validation process of the Small Aircraft Transportation Systems Higher Volume Operations (SATS HVO) concept and include an analysis of the predicted airport capacity using with different traffic conditions and system constraints under increasing levels of demand. Results show that SATS HVO procedures can dramatically increase capacity at non-towered, non-radar airports and that the concept offers the potential for increasing capacity of the overall air transportation system.

  2. Anti-Swing Control of Gantry and Tower Cranes Using Fuzzy and Time-Delayed Feedback with Friction Compensation

    Directory of Open Access Journals (Sweden)

    H.M. Omar

    2005-01-01

    Full Text Available We designed a feedback controller to automate crane operations by controlling the load position and its swing. First, a PD tracking controller is designed to follow a prescribed trajectory. Then, another controller is added to the control loop to damp the load swing. The anti-swing controller is designed based on two techniques: a time-delayed feedback of the load swing angle and an anti-swing fuzzy logic controller (FLC. The rules of the FLC are generated by mapping the performance of the time-delayed feedback controller. The same mapping method used for generating the rules can be applied to mimic the performance of an expert operator. The control algorithms were designed for gantry cranes and then extended to tower cranes by considering the coupling between the translational and rotational motions. Experimental results show that the controller is effective in reducing load oscillations and transferring the load in a reasonable time. To experimentally validate the theory, we had to compensate for friction. To this end, we estimated the friction and then applied a control action to cancel it. The friction force was estimated by assuming a mathematical model and then estimating the model coefficients using an off-line identification technique, the method of least squares (LS.

  3. The analysis on the restricting factors and countermeasures of airport noise pollution control%机场噪声污染防治制约因素与对策

    Institute of Scientific and Technical Information of China (English)

    吴娜伟; 王亚男; 李冉; 虞朝晖; 孙琪

    2014-01-01

    With the rapid development of air transport industry, the airport noise problemhas become increasingly prominent.The construction and development of airports wereobstructed byseveral issues, such as imperfect airport noise control standards, unreasonable airport site selection, and unfulfillment of deceasing-noise measuresimplementation. As an important pre management means to control the environmental risks of the airport construction project, environmental impact assessment not only has great influence on controlling the negative effects of airport noise, but also benefit to achieve the connection between the selection and construction of the airport and the local city planning. And this will avoid the old development pattern of“the airport being surrounded by city”, then to achieve the coordinated development of the airport and the city.%随着我国航空运输业的迅速发展,机场噪声问题日益突出。飞机噪声控制标准不完善、机场选址不合理、降噪措施落实不到位等问题,不利于机场的建设和发展。环境影响评价作为控制机场建设项目环境风险重要的前置性的管理手段,对控制机场噪声的不良环境影响具有重要作用,也有利于实现机场选址和建设与当地有关的规划衔接,避免走“城市包围机场”的老路,有利于实现到机场和城市发展的协调。

  4. Application of S7-300 PLC in Temperature Control System for Fractionating Tower%S7-300PLC在精馏塔温度控制系统中的应用

    Institute of Scientific and Technical Information of China (English)

    陈曦; 赵德瑞; 吕湘晔

    2011-01-01

    针对精馏塔温度系统结构复杂和精确度要求高等特点,采用西门子S7-300可编程控制器PIE对系统温度进行控制.控制回路采用单参数模糊PID调制法;同时,将单参数模糊PID控制和可编程控制器的逻辑判断指令结合起来,使PID控制更为灵活,较好地满足了生产过程的要求.实际运行结果验证了PLC应用于精馏塔温度控制系统的可行性及精确性.%Aiming at the features of the temperature system of fractionating tower, i.e.complex structure and high precision requirement, the temperature is controlled by adopting Siemens S7-300 programmable controller.The single parameter fuzzy PID modulation method is used in the control loop.In addition, the single parameter fuzzy PID control is combined with the logic judgment instruction in programmable controller,thus PID control becomes more flexible, and better meets the requirements of productive process.The result of practical operation verifies the feasibility and precision of using PLC in temperature control system of fractionating tower.

  5. Airport Configuration Prediction Project

    Data.gov (United States)

    National Aeronautics and Space Administration — There is presently poor knowledge throughout the National Airspace System (NAS) of the airport configurations currently in use at each airport. There is even less...

  6. Airport as city

    NARCIS (Netherlands)

    Yin, M.

    2011-01-01

    The airport city is a two-fold phenomenon: the areas surrounding the airport develop due to their proximity and accessibility to the terminal complex, and the terminal complex itself develops in to a pseudo-urban centre. This situation is manifest to varying extents in all major airports of the worl

  7. Lhasa Airport Gets Upgrade

    Institute of Scientific and Technical Information of China (English)

    2008-01-01

    On November 12, Gonggar Airport in Lhasa, capital of southwest China’s Tibet Autonomous Region, ended its 43-year history of not being able to handle night flights with a passenger jet bound for Chengdu City in neighboring Sichuan Province, taking off at 7:50 p.m.The progress is the result of a $150-million navigation lighting project that the airport completed in June.Gonggar Airport, situated 3,600 meters above sea level, is one of the world’shighest airports. It began operation in March 1956. After an expansion projectin 2001 -03, the airport can now handle 1.1 million passengers every year.

  8. The FAA Plans and Programs for the Future Airport and Air Traffic control System.

    Science.gov (United States)

    1980-11-13

    have been effectively resolved through minor software design changes, contrary to self-serving charges by the controllers’ union, the number of...improvements can be achieved. You will hear more later on about the computer and display replacement program. (VU-GRAPH -- ETABS ) o Other work in advanced...tabular weather uata t,’ the controllers, the Electronic Tabular Display Subsystem ( ETABS ) and the Terminal Information Display System (TIDS) will be used

  9. Productivity Analysis of Public and Private Airports: A Causal Investigation

    Science.gov (United States)

    Vasigh, Bijan; Gorjidooz, Javad

    2007-01-01

    Around the world, airports are being viewed as enterprises, rather than public services, which are expected to be managed efficiently and provide passengers with courteous customer services. Governments are, increasingly, turning to the private sectors for their efficiency in managing the operation, financing, and development, as well as providing security for airports. Operational and financial performance evaluation has become increasingly important to airport operators due to recent trends in airport privatization. Assessing performance allows the airport operators to plan for human resources and capital investment as efficiently as possible. Productivity measurements may be used as comparisons and guidelines in strategic planning, in the internal analysis of operational efficiency and effectiveness, and in assessing the competitive position of an airport in transportation industry. The primary purpose of this paper is to investigate the operational and financial efficiencies of 22 major airports in the United States and Europe. These airports are divided into three groups based on private ownership (7 British Airport Authority airports), public ownership (8 major United States airports), and a mix of private and public ownership (7 major European Union airports. The detail ownership structures of these airports are presented in Appendix A. Total factor productivity (TFP) model was utilized to measure airport performance in terms of financial and operational efficiencies and to develop a benchmarking tool to identify the areas of strength and weakness. A regression model was then employed to measure the relationship between TFP and ownership structure. Finally a Granger causality test was performed to determine whether ownership structure is a Granger cause of TFP. The results of the analysis presented in this paper demonstrate that there is not a significant relationship between airport TFP and ownership structure. Airport productivity and efficiency is

  10. Vibration Control of Articulated Tower Platform%铰接塔海洋平台的振动控制

    Institute of Scientific and Technical Information of China (English)

    蔡蕴斌; 刘锟; 蔡国平

    2013-01-01

    A tuned mass damper (TMD) was designed in the vibration control for an articulated tower platform.The motion equation of the system was firstly given with considering gravity,water pressure difference and wave force,and this equation was discreted using the finite difference method.Then active controller was designed using the optimal control method.The determination of parameters of TMD was also given in this paper.Simulation results indicate that the control effectiveness using active TMD control is better than that using passive TMD control,and the displacement of the TMD using active TMD control is smaller than that using passive TMD control.%采用调谐质量阻尼器(Tuned Mass Damper,TMD)设计了铰接塔海洋平台的振动主动控制方法.首先给出了考虑重力梯度、水压力差、波浪力等外部载荷作用的系统动力学方程,并采用有限差分法对方程进行了离散,而后采用最优控制方法设计TMD的主动控制,并给出了TMD参数的设计方法.仿真结果表明,主动TMD的控制效果优于被动TMD,而且主动控制时的TMD位移量明显小于被动控制方法.

  11. Biocide efficiency against Legionellae and amoebae in cooling towers - the necessity to control the risk of Legionnaires' disease

    Energy Technology Data Exchange (ETDEWEB)

    Guhl, W.; Hater, W.; Stumpe, S. [Henkel KGaA, Duesseldorf (Germany)

    2007-08-15

    Legionella, known to be the causative agent of Legionnaires' disease, is a wide-spread bacteria occurring naturally in water. Favorable growing conditions in man-made systems can lead to massive growth and thus to a considerable risk for human beings. Evaporative cooling towers provide good living conditions due to their operational conditions. As a consequence, the growth of Legionella in these systems has to be controlled. Amongst other measures biocides are dosed to control the growth of the microbiological population and thus the possible risk of an infection by Legionellae. However, Legionella preferably lives in biofilms and/or amoebae, which strongly shelter this microbe. Furthermore, amoebae by themselves can be harmful to humans as well. Therefore, a biocide treatment should control Legionella (planktonic in water and in biofilms/amoebae) as well as the amoebae. This paper shows that an adapted biocide treatment can increase the efficiency of a biocide against Legionellae and amoebae und therefore minimize the risk of an infection by Legionella. (orig.)

  12. Airport Ground Staff Scheduling

    DEFF Research Database (Denmark)

    Clausen, Tommy

    travels safely and efficiently through the airport. When an aircraft lands, a significant number of tasks must be performed by different groups of ground crew, such as fueling, baggage handling and cleaning. These tasks must be complete before the aircraft is able to depart, as well as check......-in and security services. These tasks are collectively known as ground handling, and are the major source of activity with airports. The business environments of modern airports are becoming increasingly competitive, as both airports themselves and their ground handling operations are changing to private...... ownership. As airports are in competition to attract airline routes, efficient and reliable ground handling operations are imperative for the viability and continued growth of both airports and airlines. The increasing liberalization of the ground handling market prompts ground handling operators...

  13. Fluctuations in airport arrival and departure traffic: A network analysis

    Institute of Scientific and Technical Information of China (English)

    Li Shan-Mei; Xu Xiao-Hao; Meng Ling-Hang

    2012-01-01

    Air traffic is a typical complex system,in which movements of traffic components (pilots,controllers,equipment,and environment),especially airport arrival and departure traffic,form complicated spatial and temporal dynamics.The fluctuations of airport arrival and departure traffic are studied from the point of view of networks as the special correlation between different airports.Our collected flow volume data on the time-dependent activity of US airport arrival and departure traffic indicate that the coupling between the average flux and the fluctuation of an individual airport obeys a certain scaling law with a wide variety of scaling exponents between 1/2 and 1.These scaling phenomena can explain the interaction between the airport internal dynamics (e.g.queuing at airports,a ground delay program and following flying traffic) and a change in the external (network-wide) traffic demand (e.g.an increase in traffic during peak hours every day),allowing us to further understand the mechanisms governing the collective behaviour of the transportation system.We separate internal dynamics from external fluctuations using a scaling law which is helpful for us to systematically determine the origin of fluctuations in airport arrival and departure traffic,uncovering the collective dynamics.Hot spot features are observed in airport traffic data as the dynamical inhomogeneity in the fluxes of individual airports.The intrinsic characteristics of airport arrival and departure traffic under severe weather is discussed as well.

  14. Tanzania - Mafia Island Airport

    Data.gov (United States)

    Millennium Challenge Corporation — The evaluation design and subsequent data gathering activities will address the following key research questions: a) Has the Mafia Island Airport Upgrade Project...

  15. Volcanic hazards to airports

    Science.gov (United States)

    Guffanti, M.; Mayberry, G.C.; Casadevall, T.J.; Wunderman, R.

    2009-01-01

    Volcanic activity has caused significant hazards to numerous airports worldwide, with local to far-ranging effects on travelers and commerce. Analysis of a new compilation of incidents of airports impacted by volcanic activity from 1944 through 2006 reveals that, at a minimum, 101 airports in 28 countries were affected on 171 occasions by eruptions at 46 volcanoes. Since 1980, five airports per year on average have been affected by volcanic activity, which indicates that volcanic hazards to airports are not rare on a worldwide basis. The main hazard to airports is ashfall, with accumulations of only a few millimeters sufficient to force temporary closures of some airports. A substantial portion of incidents has been caused by ash in airspace in the vicinity of airports, without accumulation of ash on the ground. On a few occasions, airports have been impacted by hazards other than ash (pyroclastic flow, lava flow, gas emission, and phreatic explosion). Several airports have been affected repeatedly by volcanic hazards. Four airports have been affected the most often and likely will continue to be among the most vulnerable owing to continued nearby volcanic activity: Fontanarossa International Airport in Catania, Italy; Ted Stevens Anchorage International Airport in Alaska, USA; Mariscal Sucre International Airport in Quito, Ecuador; and Tokua Airport in Kokopo, Papua New Guinea. The USA has the most airports affected by volcanic activity (17) on the most occasions (33) and hosts the second highest number of volcanoes that have caused the disruptions (5, after Indonesia with 7). One-fifth of the affected airports are within 30 km of the source volcanoes, approximately half are located within 150 km of the source volcanoes, and about three-quarters are within 300 km; nearly one-fifth are located more than 500 km away from the source volcanoes. The volcanoes that have caused the most impacts are Soufriere Hills on the island of Montserrat in the British West Indies

  16. Semiactive Vibration Control of a Wind Turbine Tower using an MR Damper

    DEFF Research Database (Denmark)

    Kirkegaard, Poul Henning; Nielsen, Søren R. K.; Poulsen, B. L.;

    2002-01-01

    For fatigue vibration reduction modern wind turbines are installed with different kind of passive systems such as a tuned mass damper or a tuned liquid damper. However, passive control systems are limited because they cannot adapt to broadbanded loading conditions, i.e. they perform well for the ...

  17. White Tower, London, England

    OpenAIRE

    William the Conqueror; William Rufus; Henry I

    2007-01-01

    White Tower (Tower of London), London, England. Photograph taken by Terry Barry. There is restoration work being carried out on one of the towers. The White Tower is a central tower at the Tower of London. The great central keep was built by William the Conqueror and finished by his sons and successors, William Rufus and Henry I, around 1087. It is 90 feet high and is of massive construction, the walls varying from 15 feet thickness at the base to almost 11 feet in the upper parts. Above ...

  18. 7m焦炉煤塔授煤控制系统改造%Transformation of the Control System for the Coal Tower of Coking Oven

    Institute of Scientific and Technical Information of China (English)

    孙光辉

    2014-01-01

    The application performance of coal receiving control system of the coal tower at the 7m top charging coke oven in Tongling Xinyaxing Coking is introduced. The abnormal shutdowns and failures caused by defects of electrical components at the coal tower mouth were analyzed in detail. The original control system was modified by adopting PLC combining with industrial wireless Ethernet technology, which has greatly enhanced the operation safety of the coal tower equipment such as the charging cars and improved production efficiency.%介绍了7m顶装焦炉煤塔授煤控制系统在铜陵新亚星焦化厂的应用情况,对煤塔漏嘴电气元件缺陷造成异常停机和事故进行了详细的分析,采用PLC结合工业无线以太网技术对原控制系统进行改造,大大增强了煤塔及装煤车等设备在运行过程中的安全性能,提高了生产效率。

  19. 日本机场噪声管理经验简介及对我国的启示%Introduction to Japan’ s Experience in Airport Noise Control and its Implications to China

    Institute of Scientific and Technical Information of China (English)

    卢力; 胡笑浒; 周鑫

    2015-01-01

    机场噪声问题一直是机场环境影响评价工作中的重点内容,也是社会各界关注的焦点。为顺利开展机场声环境影响评价和相关管理工作,理顺机场噪声污染防治工作,系统地从法律、法规、标准、科学研究、资金投入等方面对日本机场噪声管理进行了研究,梳理了我国机场噪声污染防治存在的问题,主要包括缺乏统一管理体系、评价标准不完善、投资不到位等,并结合日本经验和我国实际状况,提出了出台机场噪声管理条例、修订评价标准、建立机场噪声防治专项资金等对策建议。%The noise control is always an important component of airport environmental impact assessment. In order to improve the airport noise assessment in China, Japan’ s experience in airport noise control is introduced in terms of relevant laws and regulations, standards, research and funding. The problems with China’ s airport noise control are then analyzed such as lack of uniform management system, incomplete assessment standards and inadequate funding. Suggestions are raised in terms of establishing airport noise management regulations, revising assessment standards and setting up special fund for airport noise control.

  20. Corrosion control when using secondary treated municipal wastewater as alternative makeup water for cooling tower systems.

    Science.gov (United States)

    Hsieh, Ming-Kai; Li, Heng; Chien, Shih-Hsiang; Monnell, Jason D; Chowdhury, Indranil; Dzombak, David A; Vidic, Radisav D

    2010-12-01

    Secondary treated municipal wastewater is a promising alternative to fresh water as power plant cooling water system makeup water, especially in arid regions. Laboratory and field testing was conducted in this study to evaluate the corrosiveness of secondary treated municipal wastewater for various metals and metal alloys in cooling systems. Different corrosion control strategies were evaluated based on varied chemical treatment. Orthophosphate, which is abundant in secondary treated municipal wastewater, contributed to more than 80% precipitative removal of phosphorous-based corrosion inhibitors. Tolyltriazole worked effectively to reduce corrosion of copper (greater than 95% inhibition effectiveness). The corrosion rate of mild steel in the presence of free chlorine 1 mg/L (as Cl2) was approximately 50% higher than in the presence of monochloramine 1 mg/L (as Cl2), indicating that monochloramine is a less corrosive biocide than free chlorine. The scaling layers observed on the metal alloys contributed to corrosion inhibition, which could be seen by comparing the mild steel 21-day average corrosion rate with the last 5-day average corrosion rate, the latter being approximately 50% lower than the former.

  1. Systemic Approach to Traffic Evaluation of Mostar Airport

    Directory of Open Access Journals (Sweden)

    Eldo Raguž

    2005-11-01

    Full Text Available The attempt of this work is to systematically find solutionsfor Mostar Airport development through technical and technologicalharmonization of traffic processes undertaken in twoseparate organizations - airport and air traffic control and coordinationbetween other traffic branches. The work uses theindicators of traffic flows and tourist trends in the region, andtogether with the mentioned simulations it attempts to evaluatethe traffic potentials in the region by affecting the change in thecurrent negative traffic flows at Mostar Airport.

  2. Speed Control of a DC Motor for the Orientation of a Heliostat in a Solar Tower Power Plant using Artificial Intelligence Systems (FLC and NC

    Directory of Open Access Journals (Sweden)

    Abdelfettah Zeghoudi

    2015-06-01

    Full Text Available Recent research in the field of motor controls is becoming more interesting especially with the developments of new control methods. This study shows a comparative study between two artificial intelligence methods namely neural networks and fuzzy logic for the speed control of a DC motor for the orientation of a heliostat in a solar tower power plant. The speed controller of DC motor is performed using two Fuzzy Logic Configuration (FLC1 and FLC2 and neural controller in MATLAB environment. The simulation results are used to make sure the real possibility of using artificial intelligence systems to identify and control this type of installation. The performance of the Fuzzy Logic Controller and Neural control are compared using different errors metrics. The results show that Fuzzy logic method is more efficient compared with neural controller method.

  3. Modeling the effect of night time penalties on commercial and business flights for regional airport noise and economics: Rotterdam Airport case study

    NARCIS (Netherlands)

    Wan Mohamed, W.M.; Curran, R.; Van der Zwan, F.M.; Roling, P.

    2009-01-01

    Noise is one of the main concerns of airports around the world. Several measures have been taken by regulators to reduce noise at airports. Some of these measures are meant to control noise at major or busy airports; however, certain operational restrictions (quota, curfew, and budget) are also impl

  4. Cogeneration/district cooling system in new Kuala Lumpur International Airport; Malaysia Kuala Lumpur shinkokusai kuko no cogeneration chiiki reibo system

    Energy Technology Data Exchange (ETDEWEB)

    Nakane, S. [Tokyo Gas Co. Ltd., Tokyo (Japan)

    1998-11-05

    Described herein is a cogeneration/district cooling system for a new international airport constructed in Kuala Lumpur, the capital of Malaysia, from the design to start of services. The airport constructed in the first stage has two-4000m long runways, and sufficiently accommodates up to 84 flights an hour and more than 60 million passengers a year. It has a total floor area of approximately 700 thousand m{sub 2} for various airport facilities. The gas turbine cogeneration plant is located in a 3.8ha area, together with other facilities, including refrigerator plant, control house, cooling towers, water and jet fuel tanks, warehouses, fire-fighting pump yard, gatekeeper`s office, and parking lots for the employees and guests. The cogeneration plant produced 58,534Gcal of chilled water and 41,425MWH of power (of which 31,864MHW was supplied to the airport) in July and August at average loads of 13,008RT and 27,839kW, respectively, which represent 65 and 70% of the design loads. 2 refs., 5 figs., 8 tabs.

  5. The Leaning Tower

    Institute of Scientific and Technical Information of China (English)

    石夫

    2005-01-01

    W hy does the Leaning Tower of Pisa in Italy lean?It leans because of a m istake.It has leanedalm ostsince the day the tower was built.In1173,the people ofPisa,Italy,wanted to build a belltower.They wanted the tower to be them ost beautiful bell tower in all of Italy.The city also needed a bell tower because the church did nothave one.H owever,there was a problem.As soon as the firstfloor ofthe building was finished,the towerstarted to lean.Builders tried to m ake the building straight again as they added m...

  6. 1998 Harrisburg Airport Survey

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — This data set includes data collected in 1998 to evaluate the ability of lidar to survey airport obstructions in collaboration with NOAA National Geodetic Survey....

  7. Airport Status Web Service

    Data.gov (United States)

    Department of Transportation — A web service that allows end-users the ability to query the current known delays in the National Airspace System as well as the current weather from NOAA by airport...

  8. Thermal Effect of the Cable-Stayed Bridge Tower

    Institute of Scientific and Technical Information of China (English)

    Zhang Hai-long; Li Jun; Liu Chang-guo; Jiang Tian-hua; Wei jun

    2003-01-01

    This paper studies the thermal effect of the cable-stayed bridge tower based on full time accurate measurement and finite element analysis on Xiantao Hanjiang River Highway Bridge. The measured results and the displacement variation of top tower show that the tower rotates periodically when it is exposed in sunshine. But the tower column will not decline when there is no sunshine. In spite of in winter or in summer, the period when the tower column changed smallest is from 0∶00 am to 5∶00 am. The time period when the tower column has maximum deviation lags behind the time when the tower column has maximum temperature difference, and this phenomenon is obvious in winter. The conclusions also have directive value in predicting the tower deformations and their directions in construction control of cable-stayed bridge, and in verifying the finite element program.

  9. 基于Modbus协议的铁塔攀爬机控制系统%Design of Modbus Tower Climbing Control System

    Institute of Scientific and Technical Information of China (English)

    张洪波; 李庆梅; 赵梦奇

    2014-01-01

    铁塔攀爬机是一种新型升降设备,主要用于特高压工程输电线路铁塔检修时运载工作人员或输送检修器械。设备传动形式采用齿轮齿条式,齿轮动力来源于带减速器的交流伺服电机。安全装置信号、操作指令信号均经过可编程人机界面控制器( operator control station,OCS)处理后,再基于Modbus RTU协议向交流伺服驱动器发送指令,控制电动机运转。设备在OCS的控制下,运行安全、稳定可靠。%The eiffel tower climbing machine is a new type of lifting equipment, mainly used in transmission line iron tower engineering maintenance, carrying the staff or conveying equipment maintenance. Equipment drive mode a-dopts gear rack type, gear power from the AC servo motor with gear box. After processing by operator control station, safety device signals and operating instructions send instruction to the AC servo drive, based on the Modbus RTU proto-col, to control motor running. Under the control of OCS,the equipment is safe,stable and reliable operation.

  10. Sensitivity analysis of airport noise using computer simulation

    Directory of Open Access Journals (Sweden)

    Flavio Maldonado Bentes

    2011-09-01

    Full Text Available This paper presents the method to analyze the sensitivity of airport noise using computer simulation with the aid of Integrated Noise Model 7.0. The technique serves to support the selection of alternatives to better control aircraft noise, since it helps identify which areas of the noise curves experienced greater variation from changes in aircraft movements at a particular airport.

  11. 14 CFR 158.30 - PFC Authorization at Non-Hub Airports.

    Science.gov (United States)

    2010-01-01

    ... 14 Aeronautics and Space 3 2010-01-01 2010-01-01 false PFC Authorization at Non-Hub Airports. 158... (CONTINUED) AIRPORTS PASSENGER FACILITY CHARGES (PFC'S) Application and Approval § 158.30 PFC Authorization at Non-Hub Airports. (a) General. This section specifies the procedures a public agency controlling...

  12. Statistics Analysis Measures Painting of Cooling Tower

    Directory of Open Access Journals (Sweden)

    A. Zacharopoulou

    2013-01-01

    Full Text Available This study refers to the cooling tower of Megalopolis (construction 1975 and protection from corrosive environment. The maintenance of the cooling tower took place in 2008. The cooling tower was badly damaged from corrosion of reinforcement. The parabolic cooling towers (factory of electrical power are a typical example of construction, which has a special aggressive environment. The protection of cooling towers is usually achieved through organic coatings. Because of the different environmental impacts on the internal and external side of the cooling tower, a different system of paint application is required. The present study refers to the damages caused by corrosion process. The corrosive environments, the application of this painting, the quality control process, the measures and statistics analysis, and the results were discussed in this study. In the process of quality control the following measurements were taken into consideration: (1 examination of the adhesion with the cross-cut test, (2 examination of the film thickness, and (3 controlling of the pull-off resistance for concrete substrates and paintings. Finally, this study refers to the correlations of measurements, analysis of failures in relation to the quality of repair, and rehabilitation of the cooling tower. Also this study made a first attempt to apply the specific corrosion inhibitors in such a large structure.

  13. 基于PLC控制的水塔供水系统设计%Water Supply System Design of Water Tower Based on PLC Control

    Institute of Scientific and Technical Information of China (English)

    刘杰

    2014-01-01

    This article compared the traditional control method of automatic water system, designed the electrical control system based on PLC control which has the advantages of high reliability, strong anti-interference ability, convenient programming, ease of use, etc., developed the scheme of using the programmable controller to control the water supply system of water tower, completed the hardware and software design of electrical control system, including PLC model selection, assignment of I/O ports, I/O hardware wiring diagram drawing, PLC ladder program design. This article also elaborated the water supply process of water tower based on PLC control, and gave the corresponding control schematic.%文章在对比了传统的自动供水系统的控制方法,设计了基于PLC控制的电气控制系统,具有可靠性高,抗干扰能力强,编程方便,易于使用等优点,制定了采用可编程控制器控制水塔供水系统的方案,完成了电气控制系统硬件和软件的设计,其中包括PLC机型的选择、I/O端口的分配、I/O硬件接线图的绘制、PLC梯形图程序的设计。文章对PLC控制水塔供水工作过程也作了详细阐述,并给出了相应的控制原理图。

  14. Acoustic Imaging Evaluation of Juvenile Salmonid Behavior in the Immediate Forebay of the Water Temperature Control Tower at Cougar Dam, 2010

    Energy Technology Data Exchange (ETDEWEB)

    Khan, Fenton; Johnson, Gary E.; Royer, Ida M.; Phillips, Nathan RJ; Hughes, James S.; Fischer, Eric S.; Ploskey, Gene R.

    2011-10-01

    This report presents the results of an evaluation of juvenile Chinook salmonid (Oncorhynchus tshawytscha) behavior in the immediate forebay of the Water Temperature Control (WTC) tower at Cougar Dam in 2010. The study was conducted by the Pacific Northwest National Laboratory for the U.S. Army Corps of Engineers. The overall goal of the study was to characterize juvenile salmonid behavior and movement patterns in the immediate forebay of the WTC tower for fisheries resource managers to use to make decisions on bioengineering designs for long-term structures and/or operations to facilitate safe downstream passage for juvenile salmonids. We collected acoustic imaging (Dual-Frequency Identification Sonar; DIDSON) data from February 1, 2010 through January 31, 2011 to evaluate juvenile salmonid behavior year-round in the immediate forebay surface layer of the WTC tower (within 20 m, depth 0-5 m). From October 28, 2010 through January 31, 2011 a BlueView acoustic camera was also deployed in an attempt to determine its usefulness for future studies as well as augment the DIDSON data. For the DIDSON data, we processed a total of 35 separate 24-h periods systematically covering every other week in the 12-month study. Two different 24-hour periods were processed for the BlueView data for the feasibility study. Juvenile salmonids were present in the immediate forebay of the WTC tower throughout 2010. The juvenile salmonid abundance index was low in the spring (<200 fish per sample-day), began increasing in late April and peaked in mid-May. Fish abundance index began decreasing in early June and remained low in the summer months. Fish abundance increased again in the fall, starting in October, and peaked on November 8-9. A second peak occurred on December 22. Afterwards, abundance was low for the rest of the study (through January 2011). Average fish length for juvenile salmonids during early spring 2010 was 214 {+-} 86 mm (standard deviation). From May through early November

  15. A National Airport Conference Held

    Institute of Scientific and Technical Information of China (English)

    2004-01-01

    <正>A national working conference on civil airport was held at Ramada Pudong Airport Hotel on August 10. At the two-day conference, CAAC Minister Yang Yuanyuan and Shanghai Vice-Mayor Yang Xiong delivered speeches. Yang Guoqing, vice minister of CAAC, gave a working report on upgrading China’s civil airports.Yang Yuanyuan required all the airports to adhere to the

  16. 19 CFR 122.15 - User fee airports.

    Science.gov (United States)

    2010-04-01

    ..., California Southern California Logistics Airport. Waterford, Michigan Oakland County International Airport...-Palomar Airport. Daytona Beach, Florida Daytona Beach International Airport. Decatur, Illinois Decatur Airport. Egg Harbor Township, New Jersey Atlantic City International Airport. Englewood,...

  17. Research of Embedded Tower Crane Monitoring System Based on FCS

    Directory of Open Access Journals (Sweden)

    Xijian Zheng

    2013-09-01

    Full Text Available To compensate for the lack of traditional safety limit device of tower crane, a design scheme of embedded tower crane intelligent monitoring system based on Fieldbus Control System was proposed. By this, online collection and transmission of tower crane real-time conditions were achieved, which could effectively improve the reliability and anti-interference of the system. Embedded development technology was used to build ARM-based master control platform. Embedded Linux cross-compiler environment was also built. Combining with embedded programming software, human-computer interaction interface of tower crane intelligent monitoring system was built, storage and display of tower crane’s online parameters were also realized. The use of the technology has opened up a new field of tower crane condition monitoring application. The research of this paper may provide reference for tower crane safety monitoring and fault diagnosing.

  18. Airline competition at European airports

    NARCIS (Netherlands)

    K. Frenken; S. van Terwisga; T. Verburg; G. Burghouwt

    2004-01-01

    Hub-and-spoke networks of airlines create entry barriers at large hub airports. As a result, deregulation does not necessary lead to more competition. In this paper, airline competition at European airports in the 1990s is analysed. Results show important differences between airports, which are rela

  19. Use of social media by airports

    Directory of Open Access Journals (Sweden)

    Nigel Halpern

    2012-10-01

    Full Text Available This article investigates the use of social media by airports using content analysis of 1,559 airport websites. One-fifth of airports use at least one type of social media. There is a greater use of social media by airports in North America and Europe, by larger airports, and by airports that are owned and operated by private interests. Demand for social media is greater at airports in North America and Europe, and at larger airports. Findings from 183 airport Twitter accounts demonstrate a positive correlation between the extent to which airports are active users of social media and the number of followers that they have.

  20. Confusion at the Tower

    Science.gov (United States)

    Li, Loretta F.

    2014-01-01

    This study will explore the omission of the Tower of Babel narrative from middle and secondary school world history, world studies, and world geography textbooks and will consider what might be learned from inclusion of the story in the curriculum. A total of 17 textbooks are analyzed. The Tower of Babel narrative is examined within the context of…

  1. Cooling tower waste reduction

    Energy Technology Data Exchange (ETDEWEB)

    Coleman, S.J.; Celeste, J.; Chine, R.; Scott, C.

    1998-05-01

    At Lawrence Livermore National Laboratory (LLNL), the two main cooling tower systems (central and northwest) were upgraded during the summer of 1997 to reduce the generation of hazardous waste. In 1996, these two tower systems generated approximately 135,400 lbs (61,400 kg) of hazardous sludge, which is more than 90 percent of the hazardous waste for the site annually. At both, wet decks (cascade reservoirs) were covered to block sunlight. Covering the cascade reservoirs reduced the amount of chemical conditioners (e.g. algaecide and biocide), required and in turn the amount of waste generated was reduced. Additionally, at the northwest cooling tower system, a sand filtration system was installed to allow cyclical filtering and backflushing, and new pumps, piping, and spray nozzles were installed to increase agitation. the appurtenance upgrade increased the efficiency of the cooling towers. The sand filtration system at the northwest cooling tower system enables operators to continuously maintain the cooling tower water quality without taking the towers out of service. Operational costs (including waste handling and disposal) and maintenance activities are compared for the cooling towers before and after upgrades. Additionally, the effectiveness of the sand filter system in conjunction with the wet deck covers (northwest cooling tower system), versus the cascade reservoir covers alone (south cooling tower south) is discussed. the overall expected return on investment is calculated to be in excess of 250 percent. this upgrade has been incorporated into the 1998 DOE complex-wide water conservation project being led by Sandia National Laboratory/Albuquerque.

  2. AN AIRPORT MODERNIZES

    Institute of Scientific and Technical Information of China (English)

    2007-01-01

    t is all systems go for the new Terminal 3 at the Beijing Capital International Airport(BCLA).Called the"Gateway Project,"Terminal 3 passed its final tests on November 6 and will begin operations as of February 2008.

  3. Acoustic Imaging Evaluation of Juvenile Salmonid Behavior in the Immediate Forebay of the Water Temperature Control Tower at Cougar Dam, 2010

    Energy Technology Data Exchange (ETDEWEB)

    Khan, Fenton; Johnson, Gary E.; Royer, Ida M.; Phillips, Nathan RJ; Hughes, James S.; Fischer, Eric S.; Ham, Kenneth D.; Ploskey, Gene R.

    2012-04-01

    This report presents the results of an evaluation of juvenile Chinook salmon (Oncorhynchus tshawytscha) behavior at Cougar Dam on the south fork of the McKenzie River in Oregon in 2010. The study was conducted by the Pacific Northwest National Laboratory for the U.S. Army Corps of Engineers (USACE). The overall goal of the study was to characterize juvenile salmonid behavior and movement patterns in the immediate forebay of the Water Temperature Control (WTC) tower of the dam for USACE and fisheries resource managers use in making decisions about bioengineering designs for long-term structures and/or operations to facilitate safe downstream passage for juvenile salmonids. We collected acoustic imaging (Dual-Frequency Identification Sonar; DIDSON) data from March 1, 2010, through January 31, 2011. Juvenile salmonids (hereafter, called 'fish') were present in the immediate forebay of the WTC tower throughout the study. Fish abundance index was low in early spring (<200 fish per sample-day), increased in late April, and peaked on May 19 (6,039 fish). A second peak was observed on June 6 (2904 fish). Fish abundance index decreased in early June and remained low in the summer months (<100 fish per sample-day). During the fall and winter, fish numbers varied with a peak on November 10 (1881 fish) and a minimum on December 7 (12 fish). A second, smaller, peak occurred on December 22 (607 fish). A univariate statistical analysis indicated fish abundance index (log10-transformed) was significantly (P<0.05) positively correlated with forebay elevation, velocity over the WTC tower intake gate weirs, and river flows into the reservoir. A subsequent multiple regression analysis resulted in a model (R2=0.70) predicting fish abundance (log-transformed index values) using two independent variables of mean forebay elevation and the log10 of the forebay elevation range. From the approximate fish length measurements made using the DIDSON imaging software, the average fish

  4. Drop Tower Physics

    Science.gov (United States)

    Dittrich, William A. Toby

    2014-10-01

    The drop towers of yesteryear were used to make lead shot for muskets, as described in The Physics Teacher1 in April 2012. However, modern drop towers are essentially elevators designed so that the cable can "break" on demand, creating an environment with microgravity for a short period of time, currently up to nine seconds at the drop tower in Bremen, Germany. Using these drop towers, one can briefly investigate various physical systems operating in this near zero-g environment. The resulting "Drop Tower Physics" is a new and exciting way to challenge students with a physical example that requires solid knowledge of many basic physics principles, and it forces them to practice the scientific method. The question is, "How would a simple toy, like a pendulum, behave when it is suddenly exposed to a zero-g environment?" The student must then postulate a particular behavior, test the hypothesis against physical principles, and if the hypothesis conforms to these chosen physical laws, the student can formulate a final conclusion. At that point having access to a drop tower is very convenient, in that the student can then experimentally test his or her conclusion. The purpose of this discussion is to explain the response of these physical systems ("toys") when the transition is made to a zero-g environment and to provide video demonstrations of this behavior to support in-class discussions of Drop Tower Physics.

  5. 机场水泥混凝土道面施工质量控制技术%Quality Control Technology for Airport Cement Concrete Pavement Construction

    Institute of Scientific and Technical Information of China (English)

    董军; 贡文献

    2011-01-01

    针对机场水泥混凝土道面施工中容易出现掉边掉角、表面网状或环状裂纹、板体断裂和蜂窝麻面等质量通病,根据大面积混凝土铺筑施工的特点和环境因素,综合分析其质量通病产生的原因,并提出相应的施工控制措施,在实践中取得了明显效果,可供水泥混凝土道面施工参考.%For the common quality defects on airport cement concrete pavement such as side or corner peeling,surface pattern crack or annular crack, slab fracture, and voids and pits, according to the characteristics of large area concrete pavement construction and environmental factors, the causes of these quality defects are analyzed and the corresponding control measures are put forward, which have achieved significant effect in practical engineering. These measures can be reference for cement concrete pavement construction.

  6. Literature review of the airport business

    NARCIS (Netherlands)

    Carmona Benitez, R.B.; Lodewijks, G.

    2008-01-01

    Airports are very important for economic growth. The demand for airport capacity has been growing very fast and private companies are now also investing in airport infrastructure. Airports must however be regulated because they are natural monopolies with high market power. Airports have variables

  7. 某航空指挥塔台概念设计及技术措施%Design concept and technique resolutions for a control tower

    Institute of Scientific and Technical Information of China (English)

    李巍; 王国强; 高华; 李晓霞; 柳艳红

    2013-01-01

    太原空中交通管理中心航空指挥塔台高64m,采用型钢-混凝土剪力墙简体结构.依据建筑使用功能和立面效果的要求,工程存在多种不规则类型以及类静定结构的受力特点.结构设计对此提出有别于其他建筑的抗震设计概念和思路,并通过对结构方案的选型、对关键构件和节点的延性分析、以及有针对性地选择计算软件来分析不同受力特性等措施,使此类高耸建筑(尤其是类静定结构)满足三水准两阶段抗震设防目标.%The control tower of Taiyuan Air Route Traffic Control Center is a 64 meters tall steel reinforced concrete shear-wall tube. To fulfill the requirements of elevation and building function, the tower comes out to be an irregular structure with strength characteristic similar to the statically determinate structure. Special seismic design concept was proposed. To achieve the seismic fortification goal for such a tall building, especially as a class statically determinate structure, structural type selection, ductility analysis of crucial components and nodes and selection of analytical software were done.

  8. Ejection Tower Lab

    Data.gov (United States)

    Federal Laboratory Consortium — The Ejection Tower Facility's mission is to test and evaluate new ejection seat technology being researched and developed for future defense forces. The captive and...

  9. Theoretical and experimental study on seismic response control on top of Three-Gorges ship lift towers using magnetorheological intelligent isolation system and its keytechnique

    Institute of Scientific and Technical Information of China (English)

    Weilian QU; Jianwei TU

    2009-01-01

    A vertical ship lift under earthquake excitation may suffer from a whipping effect due to the sudden change of building lateral stiffness at the top of the ship lift towers. This paper proposes a roof magnetorheological (MR) intelligent isolation system to prevent the seismic whipping effect on machinery structures. Theoretically, the dynamic models of MR damper and the mechanical model of ship lift was established, the inverse neural network controlling algorithm was proposed and the fundamental semi-active control equation for the Three-Gorges ship lift where the MR intelligent isolation system was installed was deduced. Experimentally, the experimental model of the ship lift was given, the vibrating table experiment of the MR intelligent isolation system controlling the whipping effect was carried out and the results of the inverse neural network control strategy and passive isolation strategy were compared. In practical aspect, the large-scale MR damper (500kN) and a sliding support with limited stiffness were designed and fabricated. It was proven that the MR intelligent isolation system with proper control strategy can greatly reduce the seismic whipping effect on the top workshop of the ship lift and be simple and effective enough to be applied to real engineering structures.

  10. Airports and Airfields - AIRPORTS_NTAD_IN: Public Use Airports in Indiana (Bureau of Transportation Statistics, Point Shapefile)

    Data.gov (United States)

    NSGIC GIS Inventory (aka Ramona) — Bernardin-Lochmueller and Associates (BLA) created an Indiana subset of the NTAD airports dataset described below. Dataset includes airports, heliports, seaplane...

  11. Airports and Navigation Aids Database System -

    Data.gov (United States)

    Department of Transportation — Airport and Navigation Aids Database System is the repository of aeronautical data related to airports, runways, lighting, NAVAID and their components, obstacles, no...

  12. Cellular Phone Towers, Towers, Published in 2008, Duchesne County.

    Data.gov (United States)

    NSGIC GIS Inventory (aka Ramona) — This Cellular Phone Towers dataset, was produced all or in part from Other information as of 2008. It is described as 'Towers'. Data by this publisher are often...

  13. The TALE Tower Detector

    Science.gov (United States)

    Bergman, D. R.

    The TA Low Energy Extension will include a Tower FluorescenceDetector. Extensive air showers at the lowest usful energies for fluorescence detectors will in general be close to the detector. This requires viewing all elevation angles to be able to reconstruct showers. The TALE Tower Detector, operating in conjunction with other TALE detectors will view elevation angles up to above 70 degrees, with an azimuthal coverage of about 90 degrees. Results from a prototype mirror operated in conjunction with the HiRes detector will also be presented.

  14. AIRPORT NOISE CHARGES AND LOCAL COMMUNITIES: APPLICATION TO REGIONAL AIRPORTS

    Directory of Open Access Journals (Sweden)

    LUCA MANTECCHINI

    2016-11-01

    Full Text Available There have always been conflicts among airports and local communities due to the aeronautical noise generated by airport operations. In fact, this is a factor that - if not properly managed - could severely cut down the growth of air traffic in an airport with direct effects on the economic and territorial system. Beside this, in the last decade the critical issues related to the impact of aeronautical noise on airport operations have greatly reduced, thanks to technological improvements in aircraft design. Nevertheless, the reduction of noise emissions during a single aircraft operation does not make the issue of the airports’ location less important. This is the case of regional airports in EU, which have recently experimented a large traffic increase due to the development of low-cost traffic. It is now clear that the problem cannot be reduced to its mere technological aspect, but it ought to be dealt with the involvement of the various stakeholders in order to mitigate the emissions and adequately compensate the impacts to local communities. Typically, there are two possible countermeasures to mitigate the effects of aircraft noise: operational measures, based on the application of technological and organizational devices and market-based measures. The application of noise taxes, aiming at compensating the negative externalities generated by airport operations is becoming increasingly widespread in EU. In this paper, a methodology for the application of noise taxes based on the actual noise of aircraft operating into an airport is discussed and implemented in a test case.

  15. Adiabatic Rearrangement of Hollow PV Towers

    Directory of Open Access Journals (Sweden)

    Eric A Hendricks

    2010-10-01

    Full Text Available Diabatic heating from deep moist convection in the hurricane eyewall produces a towering annular structure of elevated potential vorticity (PV. This structure has been referred to as a hollow PV tower. The sign reversal of the radial gradient of PV satisfies the Charney-Stern necessary condition for combined barotropic-baroclinic instability. For thin enough annular structures, small perturbations grow exponentially, extract energy from the mean flow, and lead to hollow tower breakdown, with significant vortex structural and intensity change. The three-dimensional adiabatic rearrangements of two prototypical hurricane-like hollow PV towers (one thick and one thin are examined in an idealized framework. For both hollow towers, dynamic instability causes air parcels with high PV to be mixed into the eye preferentially at lower levels, where unstable PV wave growth rates are the largest. Little or no mixing is found to occur at upper levels. The mixing at lower and middle levels is most rapid for the breakdown of the thin hollow tower, consistent with previous barotropic results. For both hollow towers, this advective rearrangement of PV affects the tropical cyclone structure and intensity in a number of ways. First, the minimum central pressure and maximum azimuthal mean velocity simultaneously decrease, consistent with previous barotropic results. Secondly, isosurfaces of absolute angular momentum preferentially shift inward at low levels, implying an adiabatic mechanism by which hurricane eyewall tilt can form. Thirdly, a PV bridge, similar to that previously found in full-physics hurricane simulations, develops as a result of mixing at the isentropic levels where unstable PV waves grow most rapidly. Finally, the balanced mass field resulting from the PV rearrangement is warmer in the eye between 900 and 700 hPa. The location of this warming is consistent with observed warm anomalies in the eye, indicating that in certain instances the hurricane

  16. Optimal Inflatable Space Towers with 3 - 100 km Height

    Science.gov (United States)

    Bolonkin, Alexander

    2003-01-01

    Theory and computations are provided for building inflatable space towers up to one hundred kilometers in height. These towers can be used for tourism, scientific observation of space, observation of the Earth's surface, weather and upper atmosphere, and for radio, television, and communication transmissions. These towers can also be used to launch space ships and Earth satellites. These projects are not expensive and do not require rockets. They require thin strong films composed from artificial fibers and fabricated by current industry. The towers can be built using present technology. The towers can be used (for tourism, communication, etc.) during the construction process and provide self-financing for further construction. The tower design does not require work at high altitudes; all construction can be done at the Earth's surface. The transport system for a tower consists of a small engine (used only for friction compensation) located at the Earth's surface. The tower is separated into sections and has special protection mechanisms in case of damage. Problems involving security, control, repair, and stability of the proposed towers are addressed in other publications. The author is prepared to discuss these and other problems with serious organizations desiring to research and develop these projects.

  17. Airport Pricing Strategies

    Science.gov (United States)

    Pels, Eric; Verhoef, Erik T.

    2003-01-01

    Conventional economic wisdom suggests that congestion pricing would be an appropriate response to cope with the growing congestion levels currently experienced at many airports. Several characteristics of aviation markets, however, may make naive congestion prices equal to the value of marginal travel delays a non-optimal response. This paper has developed a model of airport pricing that captures a number of these features. The model in particular reflects that airlines typically have market power and are engaged in oligopolistic competition at different sub-markets; that part of external travel delays that aircraft impose are internal to an operator and hence should not be accounted for in congestion tolls. We presented an analytical treatment for a simple bi-nodal symmetric network, which through the use of 'hyper-networks' would be readily applicable to dynamic problems (in discrete time) such as peak - off-peak differences, and some numerical exercises for the same symmetric network, which was only designed to illustrate the possible comparative static impacts of tolling, in addition to marginal equilibrium conditions as could be derived for the general model specification. Some main conclusions are that second-best optimal tolls are typically lower than what would be suggested by congestion costs alone and may even be negative, and that the toll as derived by Brueckner (2002) may not lead to an increase in total welfare. While Brueckner (2002) has made clear that congestion tolls on airports may be smaller than expected when congestion costs among aircraft are internal for a firm, our analysis adds to this that a further downward adjustment may be in order due to market power. The presence of market power (which causes prices to exceed marginal costs) may cause the pure congestion toll to be suboptimal, because the resulting decrease in demand is too high (the pure congestion tall does not take into account the decrease in consumer surplus). The various

  18. Augmented Reality Tower Technology Assessment

    Science.gov (United States)

    Reisman, Ronald J.; Brown, David M.

    2009-01-01

    Augmented Reality technology may help improve Air Traffic Control Tower efficiency and safety during low-visibility conditions. This paper presents the assessments of five off-duty controllers who shadow-controlled' with an augmented reality prototype in their own facility. Initial studies indicated unanimous agreement that this technology is potentially beneficial, though the prototype used in the study was not adequate for operational use. Some controllers agreed that augmented reality technology improved situational awareness, had potential to benefit clearance, control, and coordination tasks and duties and could be very useful for acquiring aircraft and weather information, particularly aircraft location, heading, and identification. The strongest objections to the prototype used in this study were directed at aircraft registration errors, unacceptable optical transparency, insufficient display performance in sunlight, inadequate representation of the static environment and insufficient symbology.

  19. 19 CFR 122.84 - Intermediate airport.

    Science.gov (United States)

    2010-04-01

    ... 19 Customs Duties 1 2010-04-01 2010-04-01 false Intermediate airport. 122.84 Section 122.84... Intermediate airport. (a) Application. The provisions of this section apply at any U.S. airport to which an... aircraft arrives at the next airport, the aircraft commander or agent shall make entry by filing the:...

  20. 14 CFR 141.38 - Airports.

    Science.gov (United States)

    2010-01-01

    ... 14 Aeronautics and Space 3 2010-01-01 2010-01-01 false Airports. 141.38 Section 141.38 Aeronautics... CERTIFICATED AGENCIES PILOT SCHOOLS Personnel, Aircraft, and Facilities Requirements § 141.38 Airports. (a) An... has continuous use of each airport at which training flights originate. (b) Each airport used...

  1. Airport Careers. Aviation Careers Series. Revised.

    Science.gov (United States)

    Zaharevitz, Walter

    This booklet, one in a series on aviation careers, outlines the variety of careers available in airports. The first part of the booklet provides general information about careers at airports, while the main part of the booklet outlines the following nine job categories: airport director, assistant airport director, engineers, support personnel,…

  2. 基于复合控制的塔式太阳能跟踪控制装置设计%Design of tracking controller in solar power tower based on hybrid control

    Institute of Scientific and Technical Information of China (English)

    甘屹; 曲凤挺; 郭家忠; 王子健; 曾乐才

    2016-01-01

    针对塔式太阳能热发电站中定日镜跟踪装置的跟踪精度不高、构建成本较大等问题,提出采用将遗传算法的选择机制与吸热塔能量变化的反馈机制相结合的方式对光热电站的太阳能跟踪控制系统进行改进.在光热电站的少数几台定日镜上配备光电检测元件,并以其控制角度为基准控制其他定日镜的角度调整.采用DSP(digital signal processing)为控制核心,完成了跟踪控制器的通讯框架及控制系统的硬件电路设计.实验表明,该方案在保证光热电站整体控制精度的基础上,减少了光电检测元件安装数量和电站构建成本,并保证了视日轨迹跟踪控制时的自动调整能力.%With the problems of low tracking accuracy and high construction cost of the heliostat tracker in the solar thermal power tower,the combination of the selection mechanism of genetic algorithm and the feedback mechanism of energy changes in the heat absorption tower was proposed to improve the tracking controller.Optoelectronic sensors were equipped in a few of heliostats.Based on these heliostat control angles,the angles of the other heliostats were adjusted.The communication framework and the circuit of tracking controller were designed using DSP as the control core.Experimental results showed that the proposed solar tracking controller could reduce the number of optoelectronic sensor and the construction cost of solar thermal power plant without reducing the overall control precision of the solar thermal power tower.At the same time,the control system had the ability of automatic adjustment when its tracking control depended on the trajectory of the sun.

  3. Quality Control of Truss Storey Installation for Shanghai Tower%上海中心大厦桁架层安装施工质量控制

    Institute of Scientific and Technical Information of China (English)

    朱洁民

    2012-01-01

    The equipment storey of Shanghai Tower consists of outrigger truss, ring truss and floor radial truss. The ring truss and giant columns form the giant peripheral truss. Thus the steel structure of truss storey has characteristics of heavy segments and strict requirements on installation precision and welding quality. This paper introduces supervision control points from controlling of safety risk, installation process, components temporary stability, welding quality of super-thick plates, deformation and installation precision. Moreover the controlling points of hoisting, high-strength bolts construction and welding construction process are analyzed in detail. The quality control process and key points for steel structure are summarized to ensure the successful construction.%上海中心大厦设备层由外伸臂桁架、环带桁架和楼面径向桁架组成,环带桁架与巨型柱形成外围巨型桁架.桁架层具有钢结构分段构件重且数量多、安装精度和焊接质量要求高等施工特点.从安全风险控制、安装顺序控制、构件临时稳定控制、超厚板件焊接质量控制、变形及安装精度控制等方面介绍了监理控制要点.并详细分析了吊装、高强螺栓施工、焊接施工等各工序控制要点.系统总结了钢结构质量控制流程及关键点,保证了工程顺利施工.

  4. TacTower

    DEFF Research Database (Denmark)

    Rasmussen, Majken Kirkegaard; Jürgensen, Christine

    2009-01-01

    Learning from the multiplayer interaction in sports, we describe our project TacTower; a flexible system for professional elite handball players to train game perception and kinesthetic em- pathy. The design is founded in ideas of Collective Interaction and qualities that is inherent in sport...

  5. 单神经元PID控制在炼油装置塔顶pH控制中的应用%Application of Single Neuron PID Control in pH Control of Tower Top in Refining Units

    Institute of Scientific and Technical Information of China (English)

    徐朝阳; 陈江; 黄善祥

    2013-01-01

    pH是过程工业中一个常见的控制对象,尤其在炼油装置中对pH的控制尤为重要.文中先分析炼油装置塔顶pH的控制特点,若pH控制不好会对设备产生严重的腐蚀,这样导致设备的寿命有所下降,更影响炼油质量.再通过仿真得出合理的控制算法,能有限减小pH滞后带来的影响.最后通过PLC的编程,实现对整个系统的控制,使改进的算法在实际中得到很好地应用,可有效解决炼油装置塔顶pH控制难的问题.%pH is a common controlled parameter in the process industry,and especially it is very important in the refining units.This paper analyzed the characteristic of pH control in the tower of refining units,because it will reduce the life of the equipment at the corrosion station without being controlled well,especially influence the quality of petroleum products.Then the paper came up with a better control method according to the simulation between the common and the improved single neuron PID control which could reduce the influence from the long delayed pH value.A better method was used well in the reality with the help of PLC controller to solve the problem of the pH control of the tower top in refining units well.

  6. RISK ASSESSMENT PROCEDURE FOR CIVIL AIRPORT

    Directory of Open Access Journals (Sweden)

    Natalia Distefano

    2014-03-01

    Full Text Available A practical problem in air transport is how to manage risk and safety. In recent years have been developed special technical and managerial skills to the systematic, forward looking identification and control of hazards throughout the life cycle of a project, program, or activity. Safety Management System (SMS involves identifying, evaluating, and addressing of hazards or risk. Its sole purpose is to prevent accidents. Safety risk assessment is defined as the systematic identification and evaluation of the risk posed by the complete spectrum of possible accident scenarios. Risk assessment is a tool that supports decision making and as such supports risk management. Risk management comprises the safety optimization of the system, the verification process and risk acceptance, which support airport operations. This paper proposed a quantitative methodology for the risk assessment for a civil airport, which is based on historical data of aircraft accidents, contained in the Aviation Safety Network database, from 1 January 1980 to 31 December 2010.

  7. 76 FR 30822 - Technical Amendment to List of User Fee Airports: Addition of Naples Municipal Airport, Naples, FL

    Science.gov (United States)

    2011-05-27

    ... Airports: Addition of Naples Municipal Airport, Naples, FL AGENCY: U.S. Customs and Border Protection... user fee airports to reflect the recent user fee airport designation for Naples Municipal Airport, in Naples, Florida. User fee airports are those airports which, while not qualifying for designation...

  8. Airports (National) - National Geospatial Data Asset (NGDA) Airports

    Data.gov (United States)

    Department of Transportation — The Airports database (NTAD 2015) is a geographic point database of aircraft landing facilities in the United States and U.S. Territories. Attribute data is provided...

  9. Good Towers of Function Fields

    DEFF Research Database (Denmark)

    Bassa, Alp; Beelen, Peter; Nguyen, Nhut

    2014-01-01

    In this paper, we will give an overview of known and new techniques on how one can obtain explicit equations for candidates of good towers of function fields. The techniques are founded in modular theory (both the classical modular theory and the Drinfeld modular theory). In the classical modular...... setup, optimal towers can be obtained, while in the Drinfeld modular setup, good towers over any non-prime field may be found. We illustrate the theory with several examples, thus explaining some known towers as well as giving new examples of good explicitly defined towers of function fields....

  10. Flight delay performance at Hartsfield-Jackson Atlanta International Airport

    Directory of Open Access Journals (Sweden)

    Grigoriy Yablonsky

    2014-01-01

    Full Text Available Purpose: The main objective of this paper is to determine the annual cyclical flight delays at Hartsfield-Jackson Atlanta International Airport. Then using other data such as annual precipitation, passenger and aircraft traffic volumes and other factors, we attempted to correlate these factors with overall delays. These data could assist airport management in predicting periods of flight delay.Design/methodology/approach: Data were taken and analyzed from the data base “Research and Innovation Technology Administration” (RITA for the years 2005-2011 for Hartsfield-Jackson Atlanta International Airport. The data included 2.8 million flights originating and departing from this airport. Data were also gathered from the National Oceanic and Atmospheric Administration (NOAA showing precipitation. Additional data were gathered from the FAA regarding delay causes, number and types of delays and changes to the infrastructure of ATL airportFindings: There is a repeatable annual pattern of delays at ATL that can be modeled using delay data from the Bureau of Transportation Statistics. This pattern appears to be caused primarily by the frequency and amount of precipitation that falls at ATL and by the amount of flights that arrive and depart at ATL.Originality/value: This information could assist airport operations personnel, FAA air traffic controllers and airlines in anticipating and mitigating delays at specific times of the year.

  11. AirPort Extreme

    Institute of Scientific and Technical Information of China (English)

    2005-01-01

    AirPort Extreme是基于IEEE802.11g无线通讯协议的54Mbps的无线路由机站,它提供了比802.11b标准几乎快5倍以上的连接速率。AirPort Extreme基站可以同时为50台Mac和PC机用户服务。它支持从无线打印至带有USB接口或以太网接口的打印机,支持无线桥接技术,并同时提供了一整套强大的管理工具。除此之外,AirPort Extreme基站还配有一个内建防火墙,

  12. Background noise analysis in urban airport surroundings of Brazilian cities, Congonhas Airport, São Paulo

    Directory of Open Access Journals (Sweden)

    Fabio Scatolini

    Full Text Available ABSTRACT OBJECTIVE To perform a quantitative analysis of the background noise at Congonhas Airport surroundings based on large sampling and measurements with no interruption. METHODS Measuring sites were chosen from 62 and 72 DNL (day-night-level noise contours, in urban sites compatible with residential use. Fifteen sites were monitored for at least 168 hours without interruption or seven consecutive days. Data compilation was based on cross-reference between noise measurements and air traffic control records, and results were validated by airport meteorological reports. Preliminary diagnoses were established using the standard NBR-13368. Background noise values were calculated based on the Sound Exposure Level (SEL. Statistic parameters were calculated in one-hour intervals. RESULTS Only four of the fifteen sites assessed presented aircraft operations as a clear cause for the noise annoyance. Even so, it is possible to detect background noise levels above regulation limits during periods of low airport activity or when it closes at night. CONCLUSIONS All the sites monitored showed background noise levels above regulation limits between 7:00 and 21:00. In the intervals between 6:00-6:59 and 21:00-22:59 the noise data, when analyzed with the current airport operational characteristics, still allow the development of additional mitigating measures.

  13. Airport Surveillance Radar : Model 7 -

    Data.gov (United States)

    Department of Transportation — The Airport Surveillance Radar Model 7 (ASR-7) is a short-range (60 nautical miles (nmi)) analog radar system used to detect and report the presence and location of...

  14. Airport Surveillance Radar : Model 8 -

    Data.gov (United States)

    Department of Transportation — The Airport Surveillance Radar Model 8 (ASR-8) is a short-range (60 nautical mile (nmi)), analog radar system used to detect and report the presence and location of...

  15. Traffic Management System on Airport Manoeuvring Areas

    Directory of Open Access Journals (Sweden)

    Miroslav Borković

    2006-11-01

    Full Text Available In the last twenty years the number of flights at the busiestairports in the world has doubled, which, in the meantime hasled to a situation in which runways and taxi ways (manoeuvringareas cannot follow such substantial increase. As the result,many airports could not use their capacities in the full range interms of handling passengers and cargo. As a consequence,there were delays and traffic congestion, fuel was unnecessarilywasted, all of which caused negative impact on the environment.Traffic capacity increase on the ground cannot be consideredwithout the development and implementation of thesystem infrastructure that would optimize traffic flows and itsdistribution on the airport itself In these terms, and for positivesolution of these problems, a new system for surveillance andcontrol of aircraft on the airport manoeuvring areas is necessary,one which could be implemented fairly quickly, would becomplementary with the existing international standards andwould be upgraded to the existing and available technology andinfrastructure. With the implementation of the Advanced SurfaceMonitoring and Control System (A-SMGCS the aircrafttaxiing time could be significantly shortened and could be determinedmore accurately, which would have positive impacton the flight schedule. The unnecessary aircraft braking actionscould be also avoided, and this would reduce the fuel consumption,as well as noise and environmental pollution.

  16. Combined Application of Silencer and Sound Barrier in Cooling Tower Noise Control%消声装置和声屏障在冷却塔降噪治理中的组合应用

    Institute of Scientific and Technical Information of China (English)

    俞敏捷

    2014-01-01

    针对火电厂自然通风冷却塔的噪声污染,通过分析研究冷却塔噪声特性,以辽宁某电厂冷却塔噪声控制为例,根据厂界及敏感点噪声控制目标,利用CADNA_ A软件进行分析和预测,采取消声装置和声屏障相结合的噪声控制技术,使厂界及敏感点噪声达到相关标准,取得了理想效果,为同类工程噪声治理提供参考。%This paper focused on the noise pollution of natural ventilation cooling tower in power plant. Taking cooling towers in a power plant in Liaoning as an example,the noise characteristics and noise control of cooling towers were analyzed and studied. According to the noise control target of factory circle and sensitive points,the noise distribution was analyzed and forecasted by CADNA_ A software. The result showed that the noise in factory circle and sensitive points reached the relevant standards and achieved the desired results by the combined applica-tion of silencer and sound barrier. This approach provides a reference for similar project.

  17. TacTowers

    DEFF Research Database (Denmark)

    Ludvigsen, Martin; Fogtmann, Maiken Hillerup; Grønbæk, Kaj

    2010-01-01

    The interactive training equipment, TacTower, is aimed at supporting multiple elite athletes, such as handball players in training their micro-tactical skills in close-contact situations. It focuses on psychomotor abilities and trains the skills involved in reading the opponents’ actions and anti...... for the elite athletic community, as this domain holds interesting challenges while also inspiring relevant, new forms of interaction design for other domains....

  18. Engineering photochemical smog through convection towers

    Energy Technology Data Exchange (ETDEWEB)

    Elliott, S.; Prueitt, M.L.; Bossert, J.E.; Mroz, E.J.; Krakowski, R.A.; Miller, R.L. [Los Alamos National Lab., NM (United States); Jacobson, M.Z.; Turco, R.P. [Los Alamos National Lab., NM (United States)]|[Univ. of California, Los Angeles, CA (United States). Atmospheric Sciences Dept.

    1995-02-01

    Reverse convection towers have attracted attention as a medium for cleansing modern cities. Evaporation of an aqueous mist injected at the tower opening could generate electrical power by creating descent, and simultaneously scavenge unsightly and unhealthful particulates. The study offered here assesses the influence to tower water droplets on the photochemical component of Los Angeles type smog. The primary radical chain initiator OH is likely removed into aqueous phases well within the residence time of air in the tower, and then reacts away rapidly. Organics do not dissolve, but nighttime hydrolysis of N{sub 2}O{sub 5} depletes the nitrogen oxides. A lack of HOx would slow hydrocarbon oxidation and so also ozone production. Lowering of NOx would also alter ozone production rates, but the direction is uncertain. SO{sub 2} is available in sufficient quantities in some urban areas to react with stable oxidants, and if seawater were the source of the mist, the high pH would lead to fast sulfur oxidation kinetics. With an accommodation coefficient of 10{sup {minus}3}, however, ozone may not enter the aqueous phase efficiently. Even if ozone is destroyed or its production suppressed, photochemical recovery times are on the order of hours, so that tower processing must be centered on a narrow midday time window. The cost of building the number of structures necessary for this brief turnover could be prohibitive. The increase in humidity accompanying mist evaporation could be controlled with condensers, but might otherwise counteract visibility enhancements by recreating aqueous aerosols. Quantification of the divergent forcings convection towers must exert upon the cityscape would call for coupled three dimensional modeling of transport, microphysics, and photochemistry. 112 refs.

  19. 78 FR 38069 - Expansion of Global Entry to Additional Airports

    Science.gov (United States)

    2013-06-25

    ...); Philadelphia International Airport, Philadelphia, Pennsylvania (PHL); San Juan--Luis Munos Marin International Airport, San Juan, Puerto Rico (SAJ); Ft. Lauderdale Hollywood International Airport, Fort Lauderdale..., Texas (SAT); San Diego International Airport, San Diego, California (SAN); Tampa International...

  20. 19 CFR 122.13 - List of international airports.

    Science.gov (United States)

    2010-04-01

    ... International Airport Great Falls, Mont.—Great Falls International Airport Havre, Mont.—Havre City-County Airport Houlton, Maine—Houlton International Airport International Falls, Minn.—Falls...

  1. A Cross-Sectional Study of Tobacco Advertising, Promotion, and Sponsorship in Airports across Europe and the United States.

    Science.gov (United States)

    Soong, Andrea; Navas-Acien, Ana; Pang, Yuanjie; Lopez, Maria Jose; Garcia-Esquinas, Esther; Stillman, Frances A

    2016-09-28

    Tobacco advertising, promotion, and sponsorship (TAPS) bans are effective and are increasingly being implemented in a number of venues and countries, yet the state of TAPS in airports and their effect on airport smoking behavior is unknown. The objective of this study was to evaluate the presence of TAPS in airports across Europe and the US, and to begin to examine the relationship between TAPS and smoking behaviors in airports. We used a cross-sectional study design to observe 21 airports in Europe (11) and the US (10). Data collectors observed points of sale for tobacco products, types of products sold, advertisements and promotions, and branding or logos that appeared in the airport. Tobacco products were sold in 95% of all airports, with significantly more sales in Europe than the US. Advertisements appeared mostly in post-security areas; however, airports with advertisements in pre-security areas had significantly more smokers observed outdoors than airports without advertisements in pre-security areas. Tobacco branding appeared in designated smoking rooms as well as on non-tobacco products in duty free shops. TAPS are widespread in airports in Europe and the US and might be associated with outdoor smoking, though further research is needed to better understand any relationship between the two. This study adds to a growing body of research on tobacco control in air transit and related issues. As smoke-free policies advance, they should include comprehensive TAPS bans that extend to airport facilities.

  2. A Cross-Sectional Study of Tobacco Advertising, Promotion, and Sponsorship in Airports across Europe and the United States

    Directory of Open Access Journals (Sweden)

    Andrea Soong

    2016-09-01

    Full Text Available Tobacco advertising, promotion, and sponsorship (TAPS bans are effective and are increasingly being implemented in a number of venues and countries, yet the state of TAPS in airports and their effect on airport smoking behavior is unknown. The objective of this study was to evaluate the presence of TAPS in airports across Europe and the US, and to begin to examine the relationship between TAPS and smoking behaviors in airports. We used a cross-sectional study design to observe 21 airports in Europe (11 and the US (10. Data collectors observed points of sale for tobacco products, types of products sold, advertisements and promotions, and branding or logos that appeared in the airport. Tobacco products were sold in 95% of all airports, with significantly more sales in Europe than the US. Advertisements appeared mostly in post-security areas; however, airports with advertisements in pre-security areas had significantly more smokers observed outdoors than airports without advertisements in pre-security areas. Tobacco branding appeared in designated smoking rooms as well as on non-tobacco products in duty free shops. TAPS are widespread in airports in Europe and the US and might be associated with outdoor smoking, though further research is needed to better understand any relationship between the two. This study adds to a growing body of research on tobacco control in air transit and related issues. As smoke-free policies advance, they should include comprehensive TAPS bans that extend to airport facilities.

  3. A Cross-Sectional Study of Tobacco Advertising, Promotion, and Sponsorship in Airports across Europe and the United States

    Science.gov (United States)

    Soong, Andrea; Navas-Acien, Ana; Pang, Yuanjie; Lopez, Maria Jose; Garcia-Esquinas, Esther; Stillman, Frances A.

    2016-01-01

    Tobacco advertising, promotion, and sponsorship (TAPS) bans are effective and are increasingly being implemented in a number of venues and countries, yet the state of TAPS in airports and their effect on airport smoking behavior is unknown. The objective of this study was to evaluate the presence of TAPS in airports across Europe and the US, and to begin to examine the relationship between TAPS and smoking behaviors in airports. We used a cross-sectional study design to observe 21 airports in Europe (11) and the US (10). Data collectors observed points of sale for tobacco products, types of products sold, advertisements and promotions, and branding or logos that appeared in the airport. Tobacco products were sold in 95% of all airports, with significantly more sales in Europe than the US. Advertisements appeared mostly in post-security areas; however, airports with advertisements in pre-security areas had significantly more smokers observed outdoors than airports without advertisements in pre-security areas. Tobacco branding appeared in designated smoking rooms as well as on non-tobacco products in duty free shops. TAPS are widespread in airports in Europe and the US and might be associated with outdoor smoking, though further research is needed to better understand any relationship between the two. This study adds to a growing body of research on tobacco control in air transit and related issues. As smoke-free policies advance, they should include comprehensive TAPS bans that extend to airport facilities. PMID:27690072

  4. The new Drop Tower catapult system

    Science.gov (United States)

    von Kampen, Peter; Kaczmarczik, Ulrich; Rath, Hans J.

    2006-07-01

    The Center of Applied Space Technology and Microgravity (ZARM) was founded in 1985 as an institute of the University Bremen, which focuses on research on gravitational and space-related phenomena. In 1988, the construction of the "Drop Tower" began. Since then, the eye-catching tower with a height of 146 m and its characteristic glass roof has become the emblem of the technology centre in Bremen. The Drop Tower Bremen provides a facility for experiments under conditions of weightlessness. Items are considered weightless, when they are in "free fall", i.e. moving without propulsion within the gravity field of the earth. The height of the tower limits the simple "free fall" experiment period to max. 4.74 s. With the inauguration of the catapult system in December 2004, the ZARM is entering a new dimension. This world novelty will meet scientists' demands of extending the experiment period up to 9.5 s. Since turning the first sod on May 3rd, 1988, the later installation of the catapult system has been taken into account by building the necessary chamber under the tower. The catapult system is located in a chamber 10 m below the base of the tower. This chamber is almost completely occupied by 12 huge pressure tanks. These tanks are placed around the elongation of the vacuum chamber of the drop tube. In its centre there is the pneumatic piston that accelerates the drop capsule by the pressure difference between the vacuum inside the drop tube and the pressure inside the tanks. The acceleration level is adjusted by means of a servo hydraulic breaking system controlling the piston velocity. After only a quarter of a second the drop capsule achieves its lift-off speed of 175 km/h. With this exact speed, the capsule will rise up to the top of the tower and afterwards fall down again into the deceleration unit which has been moved under the drop tube in the meantime. The scientific advantages of the doubled experiment time are obvious: during almost 10 s of high

  5. Modeling resilience, friability, and cost of an airport affected by the large-scale disruptive event

    NARCIS (Netherlands)

    Janic, M.

    2013-01-01

    This paper deals with modeling resilience, friability, and cost of an airport affected by the largescale disruptive event. These events affecting the airport's operations individually or in combination can be bad weather, failures of particular crucial aiiport and ATC (Air Traffic Control) component

  6. Controlled Blasting Demolition of Two Cooling Towers under Complicated Environment%复杂环境下2座冷却塔控制爆破拆除

    Institute of Scientific and Technical Information of China (English)

    祁亚静; 杨小林; 褚怀保; 张英才

    2012-01-01

    Two cooling towers with 75 meters in height and 62. 84 meters in diameter in the complicated circumstances were dem- olished by directional blasting. According to the structural features,the surrounding environment and safety requirements of the cooling tower, nine shock absorption windows were opened on the front tower in the dumped direction of cooling tower,only the pillar of the cooling tower was blasted so that the wall of the cooling tower landing lightly, and the blasting take the Security measures such as duplex burst gap that pre-open a dormer and offload tank. Combined with the collapsed reasons of bursting of the cooling tower, take the method of two cooling lowers collapsed oppositely. In addition, the measured data are analyzed for the vibration, which verifies that the vibration damping effects are significantly,the measured vibration value is less than the theoretical calculated value.%采用定向倾倒控制爆破技术成功地拆除了复杂环境下2座高度分别为75 m、底部直径为62.63 m的冷却塔.针对冷却塔结构的特点,周围环境及安全要求,在冷却塔倾倒方向的正面塔体上开了9个减震窗口,仅对冷却塔人字支柱进行爆破,实现冷却塔壁体轻着落,并采取了封闭式防护和开挖减振沟及铺设缓冲垫层等安全防护措施.结合冷却塔爆破自身垮落原因,采取两冷却塔相向倒塌.此外,利用实测数据对触地振动进行了分析,验证了控振措施减振效果明显,实测振速值小于理论计算振速.

  7. Airports and Airfields - AIRPORTS_PUBLIC_INDOT_IN: Public-Use Airports in Indiana (Indiana Department of Transportation, Point Shapefile)

    Data.gov (United States)

    NSGIC GIS Inventory (aka Ramona) — AIRPORTS_PUBLIC_INDOT_IN is a point shapefile that shows public-use airports in Indiana. It is derived from data provided by personnel of the Indiana Department of...

  8. Airport Surface Access and Mobile Apps

    Directory of Open Access Journals (Sweden)

    Luis Martin-Domingo

    2015-02-01

    Full Text Available Purpose: Airport Surface Access faces two main opposite issues: (1 cars, being the main transport mode, contribute to the increasing level of congestion and pollution of cities; and (2 simultaneously, parking fees are one important source of airports commercial revenue, creating a dilemma for airports when facing the problem. Following the recent trend of air passengers travelling with Smartphone (78% in 2013, the purpose of this paper is to monitor the adoption of mobile Applications (Apps by airports and to analyze if the information and functions provided in those Apps can help to overcome the above two issues. Design/methodology/approach: 31 iPhone App of some of the largest European airports were evaluated in the lab using the evaluation model of Destinations Mobile Applications (Scolari and Fernández-Cavia 2014 adapted for for the Airport Surface Access on Airport Apps Findings and Originality/value: The Apps evaluated provided a very limited functionality to help passengers to plan and book their trips to/from the airports on public transports and gave high priority to parking information and services. Originality/value: Although Airport Surface Access has been a widely researched, the originality of this paper is the analysis of airport mobile Apps as a potential tool for airports to deal with the surface airport access problems.Access, Airports, Mobile Internet, Commercial Revenues

  9. 14 CFR 139.325 - Airport emergency plan.

    Science.gov (United States)

    2010-01-01

    ...; (8) Failure of power for movement area lighting; and (9) Water rescue situations, as appropriate. (c... will be used to accommodate uninjured, injured, and deceased persons; (6) Plans for crowd control... control of crowds in the event of an emergency on the airport; and (7) Procedures for removing...

  10. 77 FR 4394 - Release of Airport Property: Orlando Executive Airport, Orlando, FL

    Science.gov (United States)

    2012-01-27

    ... Federal Aviation Administration Release of Airport Property: Orlando Executive Airport, Orlando, FL AGENCY... provides notice of intent to release certain airport properties 12.4 acres at the Orlando Executive Airport, Orlando, FL from the conditions, release certain properties from all terms, conditions, reservations...

  11. 14 CFR 121.445 - Pilot in command airport qualification: Special areas and airports.

    Science.gov (United States)

    2010-01-01

    ... 14 Aeronautics and Space 3 2010-01-01 2010-01-01 false Pilot in command airport qualification: Special areas and airports. 121.445 Section 121.445 Aeronautics and Space FEDERAL AVIATION ADMINISTRATION... Qualifications § 121.445 Pilot in command airport qualification: Special areas and airports. (a)...

  12. Airport Ground Resource Planning Tool Project

    Data.gov (United States)

    National Aeronautics and Space Administration — This effort undertakes the creation of an Airport Ground Resource Planning (AGRP) tool. Little or no automation is currently available to support airport ground...

  13. 75 FR 39091 - Airport Privatization Pilot Program

    Science.gov (United States)

    2010-07-07

    ... Program (62 FR 48693). A request for participation in the Pilot Program must be initiated by the filing of... Federal Aviation Administration Airport Privatization Pilot Program AGENCY: Federal Aviation... (SJU) preliminary application for participation in the airport privatization pilot program...

  14. Evolution of Chinese airport network

    CERN Document Server

    Zhang, Jun; Du, Wen-Bo; Cai, Kai-Quan

    2011-01-01

    With the rapid development of economy and the accelerated globalization process, the aviation industry plays more and more critical role in today's world, in both developed and developing countries. As the infrastructure of aviation industry, the airport network is one of the most important indicators of economic growth. In this paper, we investigate the evolution of Chinese airport network (CAN) via complex network theory. It is found that although the topology of CAN remains steady during the past several years, there are many dynamic switchings inside the network, which changes the relative relevance of airports and airlines. Moreover, we investigate the evolution of traffic flow (passengers and cargoes) on CAN. It is found that the traffic keeps growing in an exponential form and it has evident seasonal fluctuations. We also found that cargo traffic and passenger traffic are positively related but the correlations are quite different for different kinds of cities.

  15. 机场航空噪声监测系统及其作用%Aircraft noise monitoring and control around airport

    Institute of Scientific and Technical Information of China (English)

    余成轩

    2012-01-01

    Combined with the practice of aircraft noise monitoring system installation at Shanghai Hongqiao International Airport, this paper introduced the development of the system in the world. The main function, system structure and key-technology are recommended. Also, how to reduce the aircraft noise with the help of monitoring system is discussed.%结合上海虹桥国际机场建设航空噪声监测系统的具体实践,探讨了机场航空噪声监测系统在国内外的发展与应用,系统关键技术及其在机场噪声管理中的作用.

  16. Decision Support for Collaborative Airport Strategic Planning

    NARCIS (Netherlands)

    Wijnen, R.A.A.

    2013-01-01

    An airport’s operation and development impacts many stakeholders. Therefore, an airport should be treated as a socio-technical system. An airport operator and its stakeholders should strategically plan and develop the airport together. This dissertation describes the development of the HARMOS Decisi

  17. Planning, Management, and Economics of Airport Operation

    Science.gov (United States)

    Wiley, J.

    1972-01-01

    An overview of the role of the airport in the transportation complex and in the community is presented. The establishment of the airport including its requirements in regional planning and the operation of the airport as a social and economic force are discussed.

  18. 19 CFR 122.85 - Final airport.

    Science.gov (United States)

    2010-04-01

    ... 19 Customs Duties 1 2010-04-01 2010-04-01 false Final airport. 122.85 Section 122.85 Customs... AIR COMMERCE REGULATIONS Procedures for Residue Cargo and Stopover Passengers § 122.85 Final airport. When an aircraft enters at the last domestic airport of discharge, the traveling general...

  19. 75 FR 39090 - Airport Privatization Pilot Program

    Science.gov (United States)

    2010-07-07

    ... procedures to be used in applications for exemption under the Airport Privatization Pilot Program (62 FR... Federal Aviation Administration Airport Privatization Pilot Program AGENCY: Federal Aviation... application for participation in the airport privatization pilot program received under 49 U.S.C....

  20. 75 FR 68018 - Airport Privatization Pilot Program

    Science.gov (United States)

    2010-11-04

    ... procedures to be used in applications for exemption under Airport Privatization Pilot Program (62 FR 48693... Federal Aviation Administration Airport Privatization Pilot Program AGENCY: Federal Aviation... the airport privatization pilot program received under 49 U.S.C. Section 47134. The...

  1. Tautological Classes on Projective Towers

    CERN Document Server

    Negut, Andrei

    2011-01-01

    When one has a tower of projective bundles over an algebraic variety and wishes to compute the push-forward of any cohomology class down this tower, one needs to recursively compute the Segre classes corresponding to each level. In this paper, we give a closed combinatorial formula that encodes this recursive procedure.

  2. Implementing Solar Technologies at Airports

    Energy Technology Data Exchange (ETDEWEB)

    Kandt, A.; Romero, R.

    2014-07-01

    Federal agencies, such as the Department of Defense and Department of Homeland Security, as well as numerous private entities are actively pursuing the installation of solar technologies to help reduce fossil fuel energy use and associated emissions, meet sustainability goals, and create more robust or reliable operations. One potential approach identified for siting solar technologies is the installation of solar energy technologies at airports and airfields, which present a significant opportunity for hosting solar technologies due to large amounts of open land. This report focuses largely on the Federal Aviation Administration's (FAA's) policies toward siting solar technologies at airports.

  3. 塔式太阳能发电系统定日镜控制研究%Research on Heliostat Control System of Solar Power Tower Plants

    Institute of Scientific and Technical Information of China (English)

    唐丽婵; 陆宇; 汤雪华

    2014-01-01

    As environmental pollution and resource waste becoming increasingly obvious, the importance of the new energy has been more and more apparent. As a representative of the new energy, solar energy has been widely used. The tower plants have the highest concentration ratio in the solar thermal power generation technology, which is the reason why tower plants can operate of a higher temperature, so that it can give higher efficiency and more power of the system. Therefore, solar tower power generation has a good application prospect.%随着环境污染和资源浪费问题的日益突出,新能源的重要性已越来越明显。太阳能作为新能源家族中的代表能源已广泛成为人们所利用的对象。在太阳能热发电技术中,塔式发电系统的聚光比最高,因此塔式发电系统可以进行更高温度的运行,从而导致更高的系统效率以及更多的电力产出。因此,太阳能塔式发电有着良好的应用前景。

  4. EIB智能照明控制系统在某航站楼工程中的应用%Application of EIB Intelligent Lighting Control System in an Airport Terminal Project

    Institute of Scientific and Technical Information of China (English)

    吴霓霞

    2014-01-01

    本文主要介绍了电气安装总线(Electrical Installation Bus,简称EIB)系统的概念、产生、特点、构成、应用及发展远景。对比传统的照明控制方式,详细介绍了EIB系统在某航站楼照明工程中的应用。%The paper mainly introduces conception, production, characteristics, composition, application and development prospect of the electrical installation bus system(EIB for short). This paper introduces the application of EIB system in lighting engineering in an airport terminal project, compared with the traditional lighting control mode.

  5. Modelling, Simulation, and Analysis of HAL BangaloreInternational Airport

    Directory of Open Access Journals (Sweden)

    P. Lathasree

    2007-11-01

    Full Text Available Air traffic density in India and the world at large is growing fast and posing challengingproblems. The problems encountered can be parameterized as flight delay, workload of air trafficcontrollers and noise levels in and around aerodromes. Prediction and quantification of theseparameters aid in developing strategies for efficient air traffic management. In this study, themethod used for quantifying is by simulation and analysis of the selected aerodrome and airspace. This paper presents the results of simulation of HAL Bangalore International Airport,which is used by civil as well as military aircraft. With the test flying of unscheduled militaryaircraft and the increase in the civil air traffic, this airport is hitting the limit of acceptable delay.The workload on air traffic controllers is pushed to high during peak times. The noise contourprediction, especially for the test flying military aircraft is sounding a wake up call to thecommunities living in the vicinity of the Airport.

  6. A Novel Surveillance System Applied in Civil Airport

    Directory of Open Access Journals (Sweden)

    Sun Hua Bo

    2016-01-01

    Full Text Available Conventional security monitoring of civil airport usually uses a fixed camera to acquire images. There are several problems with performance including difficulties introduced in the information transmission, storage, and analysis of the process. Insect compound eyes offer unique advantages for moving target capture and these have attracted the attention of many researchers in recent years. This paper contributes to this research by proposing a new surveillance system applied in civil airport. We discuss the finished bionic structure of the system, the development of the bionic control circuit, and introduce the proposed mathematical model of bionic compound eyes for data acquisition and image mosaic. Image matching for large view is also illustrated with different conditions. This mode and algorithm effectively achieve safety surveillance of airport with large field of view and high real-time processing.

  7. Health Impact Statement Schiphol Airport

    NARCIS (Netherlands)

    Staatsen BAM; Franssen EAM; Lebret E; CCM

    1994-01-01

    In this report an assessment has been made of the effects on public health caused by environmental pollution originating from activities around Schiphol airport. This investigation is part of an integral Environmental Impact Assessment that was legally required for the planned expansion of the airp

  8. Teaching at Logan International Airport

    Science.gov (United States)

    Schmidt, Steffen

    2005-01-01

    Although Terminal C at Logan airport does not look like a classroom, for about fifty minutes on this author's way back from Boston it was for him. Like many public spaces, Logan now has a very robust Wi-Fi wireless network and this enabled him to take advantage of a departure delay to "teach" his class. In 1970 when the author started…

  9. [Airport related air pollution and health effects].

    Science.gov (United States)

    Iavicoli, Ivo; Fontana, Luca; Ancona, Carla; Forastiere, Francesco

    2014-01-01

    Airport is an extremely complex emission source of airborne pollutants that can have a significant impact on the environment. Indeed, several airborne chemicals emitted during airport activities may significantly get worse air quality and increase exposure level of both airport workers and general population living nearby the airports. In recent years airport traffic has increased and consequently several studies investigated the association between airport-related air pollution and occurrence of adverse health effects, particularly on respiratory system, in exposed workers and general population resident nearby. In this context, we carried out a critical evaluation of the studies that investigated this correlation in order to obtain a deeper knowledge of this issue and to identify the future research needs. Results show that the evidence of association between airport-related air pollution and health effects on workers and residents is still limited.

  10. Human factors in layers of defense in airport security

    NARCIS (Netherlands)

    Andriessen, H.; Van Gulijk, C.; Ale, B.J.M.

    2012-01-01

    Airport security systems are built up out of layers of defence based on the security-in-depth model (Talbot & Jakeman, 2008). The Transport Safety Authority (TSA) in the United States defined a staggering 20 layers of defence to control security risks. This means that not only security personnel is

  11. Virtual Airport Simulation Technology: Perceptions of Airport Operations Initial Training Program Variables and Effectiveness for Airside Professional Competence

    Science.gov (United States)

    DeCarlo, Jeffrey

    2010-01-01

    Air travel is expected to grow by a factor of 2 to 3 times by 2025 and people working in the aviation system, including airport personnel, pilots, and air traffic controllers, must be able to safely and efficiently operate in this arena ("NextGen"). In response to the personnel training and education requirements concomitant with "NextGen,"…

  12. Cooling towers principles and practice

    CERN Document Server

    Hill, G B; Osborn, Peter D

    1990-01-01

    Cooling Towers: Principles and Practice, Third Edition, aims to provide the reader with a better understanding of the theory and practice, so that installations are correctly designed and operated. As with all branches of engineering, new technology calls for a level of technical knowledge which becomes progressively higher; this new edition seeks to ensure that the principles and practice of cooling towers are set against a background of up-to-date technology. The book is organized into three sections. Section A on cooling tower practice covers topics such as the design and operation of c

  13. Application of i-bus Intelligent Building Control System in Xianyang International Airport%i-bus智能建筑控制系统在咸阳国际机场的应用

    Institute of Scientific and Technical Information of China (English)

    刘洁; 尚东卫

    2013-01-01

    简要介绍ABB i-bus®智能建筑控制系统的结构及特点,并通过该系统在西安咸阳国际机场T3航站楼项目的应用,阐述系统现场智能面板控制、中文触摸屏控制、光照度自动感应控制、中央图形化控制,以及与其他系统的集成。%A brief intro duction to the structure and characteristics of ABB i-bus®intelligent building control system is provided. The integrated functions of intelligent panel control, Chinese touch screen control, light illuminance automatic induction control and central graphical control integration with other systems are described through the application of the system in terminal building T3 of Xianyang international airport in Xi’ an.

  14. Anti-swing Control of Fuzzy Neural Network of Tower Crane Based on Passivity%基于无源性的塔机模糊神经网络防摆控制

    Institute of Scientific and Technical Information of China (English)

    王雨婷; 陈志梅; 邵雪卷

    2015-01-01

    针对塔式起重机的防摆控制问题,提出了一种基于无源性的模糊神经网络控制方法。通过建立Lyapunov能量函数,分析了系统的无源特性,在此基础上采用模糊控制并依靠神经网络对隶属函数进行学习,不需要依赖系统精确的数学模型,实现了塔式起重机小车的定位和负载的防摆,提高了系统的鲁棒性。仿真结果表明该方法的有效性和可行性。%Aiming at anti swing of tower crane,a control method of fuzzy neural network based on passivity is pro-posed. The passivity of system is analyzed by establishing the Lyapunov energy function,and the membership func-tion can be learned to rely on neural network by using fuzzy control on this basis. The accurate mathematical model of system was no more needed. In this method the position and anti swing of tower crane can be related. The robust-ness of system also be improved. The simulation results proved the feasibility and effectiveness of the method.

  15. SOME ISSUES OF THE AIRPORT MANAGEMENT

    Directory of Open Access Journals (Sweden)

    Marian Ovidiu

    2012-07-01

    Full Text Available Internationally, the recommended standards for the operation and management of civil-use airports are provided by the International Civil Aviation Organization (ICAO. In most individual countries, airports are managed directly by the government, most often under the ministry of transport. In some countries, including EU countries, some airports are privately owned and operated, although, despite private ownership, they are still subject to much of the country’s regulations regarding aviation operations. The complex system of civil airports is made up of individual airport facilities of varying sizes, serving various purposes, all organized into plans of regional, national, and international levels. The range of rules, regulations, and policies, administered from varying levels of government, cover the full spectrum of airport and aviation system operations. Furthermore, a large number of professional and industry organizations play a large part in influencing the policies by which airport management must operate their facilities. By understanding where an airport manager’s airport falls within the civil aviation system, what rules must be followed, and what sources of support and assistance exist, the task of efficiently managing the complex system that is an airport, becomes highly facilitated.

  16. 基于ARM9的机场应急救援拖车同步控制研究%Research of airport emergency rescue trailer synchronous control based on ARM9

    Institute of Scientific and Technical Information of China (English)

    张积洪; 周同旭

    2012-01-01

    A synchronous electrical control system of airport emergency rescue trailer is designed. Based on the ARM-Linux platform, the GUI and programming design of host and master PC is completed by using Qt/Embedded and Ladder, and the host and the master computer take ARM9 and PLC as the core respectively, and they communicate through 485. By connecting the testing model and control system, the simultaneously turning function controlled by remote controller is achieved. The feasibility of the system has been confirmed by testing the model.%研究了一种机场应急救援拖车的同步电气控制系统.基于ARM-Linux平台,上位机以ARM9为核心,下位机以PLC为核心,使用Qt/Embedded和梯形图完成对上、下位机的GUI和程序设计,上下位机采用485通讯.连接试验模型和控制系统,实现了用遥控器控制机场应急救援拖车同步转向,通过对模型的测试,其可行性已被初步的实验证实.

  17. Vienna international airport noise abatement

    Directory of Open Access Journals (Sweden)

    Heidelinde Jelinek-Nigitz

    2016-03-01

    Full Text Available Purpose: On the topic of sustainable aviation a study was carried out to measure the difference between the actual change in air traffic noise and the airport’s residents’ perception of the noise change at Vienna International Airport. Therefore, a questionnaire was developed in cooperation with the airport and an online survey was conducted. Design/methodology/approach: For the survey of the opinion of the affected population of the surrounding communities, a web based online questionnaire is created and distributed via various channels including e-mail, and online forums. After the basic structure of the questionnaire had been defined, the questions were developed in cooperation with employees form the environmental department of VIE, who had a sustainable influence on the questions’ order and formulation. As the survey was supposed to be answered by residents around VIE. Findings: Results of the online study show that only parts of the participants are affected by air traffic noise at VIE. Even less experienced a significant change over the last five years. About one third of the participants stated that they are affected by air traffic noise in one way or another. The majority of these people live in Lower Austria, the federal state in which the airport is located. The participants obviously judge air traffic noise during day time more importantly than air traffic noise at night. Research limitations/implications: Due to the low number of returns, no statistically relevant conclusions can be drawn, the results of the survey can be used to make some general statements. Originality/value: Economic growth and deregulation lead to growing aircraft operations. Vienna International Airport with its approximately 260,000 flight movements per year is the biggest airport in Austria and a major hub in Europe. The combination of constantly growing air transport and the resulting noise exposure, as well as the steadily increasing

  18. Allegheny County Cell Tower Points

    Data.gov (United States)

    Allegheny County / City of Pittsburgh / Western PA Regional Data Center — This dataset portrays cell tower locations as points in Allegheny County. The dataset is based on outbuilding codes in the Property Assessment Parcel Database used...

  19. 45-FOOT HIGH DROP TOWER

    Data.gov (United States)

    Federal Laboratory Consortium — The Drop Tower is used to simulate and measure the impact shocks that are exerted on parachute loads when they hit the ground. It is also used for HSL static lift to...

  20. Tower Temperature and Humidity Sensors (TWR) Handbook

    Energy Technology Data Exchange (ETDEWEB)

    Cook, DR

    2010-02-01

    Three tall towers are installed at the Atmospheric Radiation Measurement (ARM) Climate Research Facility: a 60-meter triangular tower at the Southern Great Plains (SGP) Central Facility (CF), a 21-meter walkup scaffolding tower at the SGP Okmulgee forest site (E21), and a 40-meter triangular tower at the North Slope of Alaska (NSA) Barrow site. The towers are used for meteorological, radiological, and other measurements.

  1. 76 FR 31823 - Technical Amendment to List of User Fee Airports: Addition of Dallas Love Field Municipal Airport...

    Science.gov (United States)

    2011-06-02

    ... Airports: Addition of Dallas Love Field Municipal Airport, Dallas, TX AGENCY: U.S. Customs and Border... revising the list of user fee airports to reflect the recent user fee airport designation for Dallas Love... of user fee status for Dallas Love Field Municipal Airport. This document updates the list of...

  2. Strategic development of commercial airports in Chongqing

    Institute of Scientific and Technical Information of China (English)

    夏煦

    2014-01-01

    Civil airports in China in the last 10 years have expanded substantially, and the construction of airports has come into a period planning to build airports into large transportation hub. This article combines the new trends of commercial real estate and the airport business, and explores various business marketing and management modes for operating airports with specific reference to the case of Chongqing. The main research results are as follows: First, the introduction of products and services markets should make more focus on the structure and habits of travelers. Second, developing new commercial projects through the BOT model and practicing resource replacement mode. Third, planning the terminal surrounding functions, the layout of successful business is the key factor of the rapid increase of airport non-aeronautical revenue.

  3. The impact of mobile marketing in airport

    Directory of Open Access Journals (Sweden)

    Lázaro Florido-Benítez

    2016-02-01

    Full Text Available Purpose: This paper seeks to analyze the effects of mobile marketing tool at airports and passengers. Design/methodology: This research approach consist of going through data files and bibliographical sources in search of information gathered by authors, institutions and organizations regarding our case study. Findings: Mobile marketing to increase passenger satisfaction and commercial income in the airports. Large airports are taking advantage of the consolidation of mobile devices in the 21st century to create applications for branding and communication. Originality/value: This paper is the first research that examines the impact of mobile marketing in airports. First, to evaluate the effects that mobile marketing is having over the levels of passenger satisfaction at airports. Second, to analyze the impact of mobile marketing on passengers behavior in the aerodrome; lastly, to study the effects of this tool on the perceived image of an airport.

  4. Study on Settlement Control of Intercity Railway Tunnel under-passing Flight Area of Shenzhen Airport%城际铁路隧道下穿机场飞行区沉降控制研究

    Institute of Scientific and Technical Information of China (English)

    袁新朋

    2015-01-01

    Aiming at the problem of Pearl River Delta Intercity Railway under passing the airport for the first time,based on a wide range of investigation and fieldwork,combined with the actual situation of the project,a settlement control standard of Guangzhou-Dongguan-Shenzhen intercity railway undercrossing Shenzhen Airport pavement is put forward in the paper. Combined with the environmental conditions and the special settlement control standard of the flight area,3D numerical analysis method is applied to simulate the construction process of shield tunnel,the degree and influence area of the construction process to soil disturbance are obtained and surface subsidence of different buried depths is calculat-ed. According to the analysis result,the revised settlement control standard is proposed. Suggestions on pavement moni-toring during construction process are put forward according to the complex environment in the flight area. The automatic total station is erected in non-pavement area to perform whole cycle prismatic-free automatic scanning on the specified pavement to solve the problems such as difficult admittance of personnel in flight area and no monitoring point embed-ded.%针对珠三角城际铁路首次下穿运营机场的问题,通过广泛的资料调研和实地考察,结合工程实际,提出了穗莞深城际铁路下穿深圳机场道面沉降控制标准。结合飞行区环境条件及特殊的沉降控制标准,采用三维数值分析方法对盾构隧道施工过程进行模拟分析,给出了施工过程对土体扰动的程度及影响范围,计算了不同埋深的地表沉降。根据分析结果提出了穿越过程修正的沉降控制标准。根据飞行区地表复杂的环境提出了施工过程的道面监测建议,即在非道面区架设自动全站仪,对指定道面进行全周期无棱镜自动扫面,以解决飞行区人员准入难、不准埋设监测点等问题。

  5. Discussion Selection and Using Principles of the P-xylene Unit Adsorbent Tower Program-controlled Valve%对二甲苯装置吸附塔程控阀选型及使用原则探讨

    Institute of Scientific and Technical Information of China (English)

    秦文戈

    2015-01-01

    The p-xylene unit of the Sinopec independent intellectual property rights,using the sequence control program control many sets of program-controlled switch valve order, in order to realize the continuous operation of simulated moving bed adsorption separation process . Among them, the duration of program-controlled valve switch, the synchronicity, the stability of the long period operation and other factors, such as setting parameters of the sequence control program directly affect adsorbent tower pressure stability. This paper key analysis and discuss the principles and matters for attention in the selection and putting-in-service proactively adjustment and operation of the valve ,on the basis of the sinopec process, to facilitate the valve run steady for a long time, reduce the adsorbent tower pressure fluctuations, finally realizes the stable long run of the plant.%中石化自主知识产权的对二甲苯装置,利用顺控程序控制多台程控阀顺序开关,以实现模拟移动床吸附分离工艺的连续运行。其中,程控阀开关时间的长短、切换的同步性、长周期运行的稳定性等因素直接影响吸附塔的压力稳定。本文以中石化的多程控阀工艺为基础,重点分析并探讨了程控阀在选型、投用调试及运行过程中应当遵循的原则和注意事项,以利于程控阀长周期稳定运行,减少吸附塔压力波动,最终实现装置的安稳长运行。

  6. Reducing the risk of Legionnaires' disease associated with cooling towers

    Energy Technology Data Exchange (ETDEWEB)

    Freije, M.R. [HC Information Resources Inc., Carlsbad, CA (United States)

    2008-08-15

    To reduce the health and legal risks associated with Legionnaires' disease, facility managers should take steps to minimize Legionella bacteria in plumbing systems, open industrial equipment, water features, cooling towers, and other aerosolizing water systems. The risk of Legionnaires' disease associated with cooling towers can be reduced by controlling Legionella bacteria in cooling water and preventing transmission of the bacteria from towers to people. This paper presents nine reasonable ways to accomplish these goals. (orig.)

  7. Scheduling of outbound luggage handling at airports

    DEFF Research Database (Denmark)

    Barth, Torben C.; Pisinger, David

    2012-01-01

    This article considers the outbound luggage handling problem at airports. The problem is to assign handling facilities to outbound flights and decide about the handling start time. This dynamic, near real-time assignment problem is part of the daily airport operations. Quality, efficiency......). Another solution method is a decomposition approach. The problem is divided into different subproblems and solved in iterative steps. The different solution approaches are tested on real world data from Frankfurt Airport....

  8. Travel Time Variability and Airport Accessibility

    OpenAIRE

    Koster, P.R.; Kroes, E.P.; Verhoef, E.T.

    2010-01-01

    This discussion paper resulted in a publication in Transportation Research Part B: Methodological (2011). Vol. 45(10), pages 1545-1559. This paper analyses the cost of access travel time variability for air travelers. Reliable access to airports is important since it is likely that the cost of missing a flight is high. First, the determinants of the preferred arrival times at airports are analyzed, including trip purpose, type of airport, flight characteristics, travel experience, type of che...

  9. Denver's airport of doom; the story behind the world's possibly most controversial airport

    NARCIS (Netherlands)

    Stolwijk, J.

    2014-01-01

    Big airport projects have often been prone to controversy. Schiphol’s Polderbaan project, Heathrow’s expansion, and the construction of Berlin’s new airport all suffered from political, financial or technical issues. However, Denver International Airport (often referred to as DIA) caused uproar in s

  10. 75 FR 54946 - Airport Improvement Program (AIP): Policy Regarding Access to Airports From Residential Property

    Science.gov (United States)

    2010-09-09

    ... Federal Register on October 13, 2009 (74 FR 52524). Comments were due on March 31, 2010. Comments on the... Federal Aviation Administration Airport Improvement Program (AIP): Policy Regarding Access to Airports... Federally obligated airport from an adjacent or nearby property, when that property is used as a...

  11. Precise Ortho Imagery as the Source for Authoritative Airport Mapping

    Science.gov (United States)

    Howard, H.; Hummel, P.

    2016-06-01

    As the aviation industry moves from paper maps and charts to the digital cockpit and electronic flight bag, producers of these products need current and accurate data to ensure flight safety. FAA (Federal Aviation Administration) and ICAO (International Civil Aviation Organization) require certified suppliers to follow a defined protocol to produce authoritative map data for the aerodrome. Typical airport maps have been produced to meet 5 m accuracy requirements. The new digital aviation world is moving to 1 m accuracy maps to provide better situational awareness on the aerodrome. The commercial availability of 0.5 m satellite imagery combined with accurate ground control is enabling the production of avionics certified .85 m orthophotos of airports around the globe. CompassData maintains an archive of over 400+ airports as source data to support producers of 1 m certified Aerodrome Mapping Database (AMDB) critical to flight safety and automated situational awareness. CompassData is a DO200A certified supplier of authoritative orthoimagery and attendees will learn how to utilize current airport imagery to build digital aviation mapping products.

  12. PRECISE ORTHO IMAGERY AS THE SOURCE FOR AUTHORITATIVE AIRPORT MAPPING

    Directory of Open Access Journals (Sweden)

    H. Howard

    2016-06-01

    Full Text Available As the aviation industry moves from paper maps and charts to the digital cockpit and electronic flight bag, producers of these products need current and accurate data to ensure flight safety. FAA (Federal Aviation Administration and ICAO (International Civil Aviation Organization require certified suppliers to follow a defined protocol to produce authoritative map data for the aerodrome. Typical airport maps have been produced to meet 5 m accuracy requirements. The new digital aviation world is moving to 1 m accuracy maps to provide better situational awareness on the aerodrome. The commercial availability of 0.5 m satellite imagery combined with accurate ground control is enabling the production of avionics certified .85 m orthophotos of airports around the globe. CompassData maintains an archive of over 400+ airports as source data to support producers of 1 m certified Aerodrome Mapping Database (AMDB critical to flight safety and automated situational awareness. CompassData is a DO200A certified supplier of authoritative orthoimagery and attendees will learn how to utilize current airport imagery to build digital aviation mapping products.

  13. Analysis of Welding Deformation Prevention and Control of Tower Flange and Cylinder%风力发电塔架法兰与筒体焊接变形预防控制技术分析

    Institute of Scientific and Technical Information of China (English)

    高永君; 刘坚宏; 张斌; 席嘉伟; 马志文

    2014-01-01

    风力发电塔架法兰与筒体焊接时,法兰平面易产生“角变形”,致使法兰平面度、内倾度、法兰椭圆度超标,为了预防和控制法兰变形,故在法兰采购时预留内倾量,并在焊接采用对把焊接,在两法兰之间夹垫片用螺栓紧固,严控焊接顺序。该方法可很好地控制法兰平面度、内倾度变形。此控制方法已在工程中得到应用,收获了很好的经济效果。%Tis paper provided the prevention and control of welding deformation of wind power tower fange and cylinder, wind power tower flange and cylinder welding.The flange plane is easy to produce"angular deformation".Thus, the flange flatness negative camber exceeded the standard fange ellipticity. In order to prevent and control the deformation of fange, the reserved introverted in flange procurement (welding deformationamount), and a pair of flanges on the welding in welding, clamping pad between two fanges and fxed by fastening bolts, strict control of welding sequence and a welding. Te technical measures can meet the requirements of inner flange flatness, inclination, and the control method has been applied in the engineering, and gains good results.

  14. Taxi Time Prediction at Charlotte Airport Using Fast-Time Simulation and Machine Learning Techniques

    Science.gov (United States)

    Lee, Hanbong

    2016-01-01

    Accurate taxi time prediction is required for enabling efficient runway scheduling that can increase runway throughput and reduce taxi times and fuel consumptions on the airport surface. Currently NASA and American Airlines are jointly developing a decision-support tool called Spot and Runway Departure Advisor (SARDA) that assists airport ramp controllers to make gate pushback decisions and improve the overall efficiency of airport surface traffic. In this presentation, we propose to use Linear Optimized Sequencing (LINOS), a discrete-event fast-time simulation tool, to predict taxi times and provide the estimates to the runway scheduler in real-time airport operations. To assess its prediction accuracy, we also introduce a data-driven analytical method using machine learning techniques. These two taxi time prediction methods are evaluated with actual taxi time data obtained from the SARDA human-in-the-loop (HITL) simulation for Charlotte Douglas International Airport (CLT) using various performance measurement metrics. Based on the taxi time prediction results, we also discuss how the prediction accuracy can be affected by the operational complexity at this airport and how we can improve the fast time simulation model before implementing it with an airport scheduling algorithm in a real-time environment.

  15. 云南大理机场鸟类调查及鸟撞防治对策%Bird Survey and Bird Strike Control at Dali Airport, Yunnan Province

    Institute of Scientific and Technical Information of China (English)

    罗旭; 梁丹; 马国强; 杜小浪; 洪磊

    2011-01-01

    The projected ground surface area around the Dali airport was classified into 7 types of bird habitat, I. E. , orchards or nurseries, mills or factories, villages, forests, water bodies, cropland and barren hills to obtain the basic ecological information for bird strike control in this area. Four surveys on bird species and corresponding numbers in the 7 types of habitats were conducted in the four seasons of 2010, and the characteristics of the habitat vegetation and those of the insect communities were also investigated at the same time. The threat extent of different bird species to the aviation safety was comprehensively analyzed according to the data of bird size, flight height, size of population and occurrence frequency. The survey showed that there were totally 81 bird species belonging to 31 families of 12 orders recorded in the peripheral area of Dali airport, among which 6 species were listed as highthreat species, 14 as threat species and 61 species were listed as less threat species in the light of their body size, flight activity and other behavior characters. The bird strike control strategy was proposed to secure the flight safety for the airport based on analyses of the topography, habitat, season change, food source and other factors.%为获得云南大理机场鸟撞预防所需的基础性生态资料,将大理机场净空范围内的地面投影区域分为果园苗圃、工厂、村落、林地、水域、农地、荒山7种类型生境,2010年春、夏、秋、冬季分4次对这7种生境的鸟类种类和数量进行调查,同时收集栖息地植被与昆虫群落特征.根据鸟类体型、飞行高度、群体数量以及遇见频次等信息综合分析各种鸟类对航空飞行的威胁程度.结果表明:大理机场及其周边共有鸟类81种,隶属于12目31科,其中有严重威胁鸟类6种、有威胁的14种和无威胁的61种;从地形、生境、季节、食源等方面对威胁鸟种进行分析,并依此提出大理机场鸟撞防治对策.

  16. Tall towers for large wind turbines. Report from Vindforsk project V-342

    Energy Technology Data Exchange (ETDEWEB)

    Engstroem, Staffan; Lyrner, Tomas; Hassanzadeh, Manouchehr; Stalin, Thomas; Johansson, John

    2010-07-15

    joints both longitudinally and laterally. Such a tower is transported as the separate cut, bent, drilled and painted steel plates, which are assembled at the turbine site. Also pretensioned concrete towers have a long history in wind power, starting with in-situ built slip formed towers. Today most concrete towers are assembled from prefabricated elements, cast in sizes allowing road transportation. The advantages of the concrete towers are concentrated to the lower parts, which are capable of absorbing large moments in an economical way. Therefore hybrid towers are appearing on the market, with a concrete part for the lower section and a conventional steel shell tower for the upper. From the present study one can draw a quite firm conclusion that hybrid towers generally are more economical than pure concrete ones. Due to the very large base width, lattice towers reveal the lowest weights and investments of all towers. The advantages are counteracted by disadvantages that may be equally strong. The number of bolts is very high and they need periodic checking. The dynamic properties are hard to control. During icing conditions large accumulation of ice in extreme cases may endanger the turbine. An acceptable level of safety for the maintenance personnel may be hard to maintain. And finally the visual qualities are controversial. Wood has been used as a construction material for wind turbine blades for decades, but only recently considered for wind turbine towers. This may seem strange, since towers should be a less demanding application than blades. Wood is also in general known to be an economical construction material resistant to fatigue and buckling. The so far only large wind turbine tower of wood is designed by a German company for a 1,5 MW wind turbine. In this report the wooden towers were studied less extensively than the others, due to the less developed and known technology especially regarding joints. From the study one can draw a general conclusion that it is

  17. Control system design for the deethanizer absorber tower pressure in the light end unit of the Nico Lopez refinery; Diseno del sistema de control para la presion en la torre absorvedora deetanizadora de la unidad de finales ligeros de la refineria Nico Lopez

    Energy Technology Data Exchange (ETDEWEB)

    Morales Corral, Camilo [Refineria Nico Lopez, Ciudad Habana (Cuba)]. E-mail: Camilo.morales@refhab.cupet.cu; Pedre Mendoza, Isabel [DAISA, Ciudad Habana (Cuba)]. E-mail: Isabel@daisa.copextel.com.cu; Garcini Leal, Hector J. [Instituto Superior Politecnico Jose A. Echeverria, La Habana (Cuba)]. E-mail: garcini,novi@electrica.cujae.edu.cu; Fernandez, Luis M. [Instituto de Cibernetica, Matematica y Fisica, La Habana (Cuba)]. E-mail: luis@icmf.inf.cu; Benitez Gonzalez, Ivon Oristela [Instituto Superior Politecnico Jose A. Echeverria, La Habana (Cuba)

    2010-11-15

    This paper is about pressure feed forward control. It is for an absorber tower of the Light End Unit. This one is in the Havana Oil Refinery. Control loop was designed using identification technic and simulation software. Moreover the design control loop has been validated and his quality has been determined. [Spanish] En el presente trabajo se aborda un control anticipatorio de presion. Fue desarrollado para la torre absorvedora de la Unidad de Finales Ligeros. La cual pertenece a la refineria de La Habana. Fue disenado un lazo de control empleando tecnicas de identificacion y programas de simulacion. Ademas el lazo disenado es validado y se determina su calidad.

  18. Legionella safety in cooling towers; Legionellaveiligheid in koeltorens

    Energy Technology Data Exchange (ETDEWEB)

    Kordes, B. [Kordes Advies, (Netherlands); De Bok, F. [KBBL Wijhe, (Netherlands); De Zeeuw, L. [Holland Environment Group, (Netherlands); Settels, P. [Safety, Health Services and Ergonomics, ING, (Netherlands); Oesterholt, F.; Wullings, B. [KWR Watercycle Research Institute, (Netherlands); Guiot, P. [Tevan, Gorinchem (Netherlands); Brands, R. [Cumulus Nederland, Cuijk (Netherlands); Nuijten, O. [Kennisinstituut ISSO, Rotterdam (Netherlands); Wijne, R. [Beer advocaten, Amsterdam (Netherlands)

    2010-04-15

    In 9 articles attention is paid to several aspects with regard to Legionella in cooling towers: representative sampling, the use of copper and silver ionization or hydrogen peroxide to prevent Legionella growth and biofilms, the use of a zero-tolerance model to control a cooling tower installation, detection of DNA of Legionella Pneumophila, legionella safety in air conditioners, the model Legionella risk analysis and control of cooling tower installations, legislation and regulations for the control of cooling tower installations with regard to the Dutch Occupational Health and Safety Act ('Arbo-wet'), and an article about a lawsuit for victims of a Legionella outbreak, caused by careless owners of a cooling tower in Amsterdam, Netherlands. [Dutch] In 9 artikelen wordt in deze aflevering aandacht besteed aan verschillende aspecten m.b.t. Legionella in koeltorens: representatieve monstername, de toepassing van koper en zilver-ionisatie of waterstofperoxide om de groei van Legionella en biofilms te voorkomen, het gebruik van een zero-tolerance model om een koeltoren installatie te controleren, detectie van DNA van Legionella Pneumophila, Legionella veiligheid in luchtbehandelingsinstallaties, het model Legionella risicoanalyse en beheersplan voor koeltoreninstallaties, de rol van de Arbo-wet, en een artikel over een rechtszaak voor slachtoffers van Legionella door onzorgvuldig beheer van een koeltoren in Amsterdam.

  19. Virtual queuing at airport security lanes

    NARCIS (Netherlands)

    Lange, de R.; Samoilovich, I.; Rhee, van der B.

    2013-01-01

    Airports continuously seek opportunities to reduce the security costs without negatively affecting passenger satisfaction. In this paper, we investigate the possibilities of implementing virtual queuing at airport security lanes, by offering some passengers a time window during which they can arrive

  20. 40 CFR 258.10 - Airport safety.

    Science.gov (United States)

    2010-07-01

    ... 40 Protection of Environment 24 2010-07-01 2010-07-01 false Airport safety. 258.10 Section 258.10 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) SOLID WASTES CRITERIA FOR MUNICIPAL SOLID WASTE LANDFILLS Location Restrictions § 258.10 Airport safety. (a) Owners or operators of...

  1. Modelling delay propagation within an airport network

    NARCIS (Netherlands)

    Pyrgiotis, N.; Malone, K.M.; Odoni, A.

    2013-01-01

    We describe an analytical queuing and network decomposition model developed to study the complex phenomenon of the propagation of delays within a large network of major airports. The Approximate Network Delays (AND) model computes the delays due to local congestion at individual airports and capture

  2. 14 CFR 398.3 - Specific airports.

    Science.gov (United States)

    2010-01-01

    ... 14 Aeronautics and Space 4 2010-01-01 2010-01-01 false Specific airports. 398.3 Section 398.3... STATEMENTS GUIDELINES FOR INDIVIDUAL DETERMINATIONS OF BASIC ESSENTIAL AIR SERVICE § 398.3 Specific airports. (a) At an eligible place, essential air service may be specified as service to a particular...

  3. Airports of the United States - Direct Download

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — This map layer includes airports in the United States, Puerto Rico and the U.S. Virgin Islands. The data were derived from an extract of the Public-Use Airports...

  4. 32 CFR 644.423 - Airport development.

    Science.gov (United States)

    2010-07-01

    ... 32 National Defense 4 2010-07-01 2010-07-01 true Airport development. 644.423 Section 644.423... development. (a) Authority. 49 U.S.C. 1723 provides that (a) . . . whenever the Secretary of Transportation... carrying out a project for airport development under this subchapter, or for the operation of any...

  5. Light Rails at Kennedy Airport

    Institute of Scientific and Technical Information of China (English)

    2004-01-01

    <正>The Port Authority in New Jersey, New York opened a new light rail on December 18, 2003 to link Kennedy Airport to New York city. The rail with an investment of US$1.5 billion runs along the airport’s terminals, taxi stop, shuttle station and parking area to connect with the city’s downtown rail network, subways, railways and coach stations.The light rail is convenient, safe, reliable and fast to free passengers of the worries about traffic jam and the pressure

  6. Tighter Airports,Safer Games

    Institute of Scientific and Technical Information of China (English)

    2008-01-01

    China’s aviation authorities have beefed up security measures in order to guarantee an incident-free Olympics New security check procedures issued by China’s civil aviation authorities in the wake of a foiled terrorist attack will make Chinese airports and air travel safer. The regulations,which came into force on March 14,banned liquid products,including drinks,and some cosmetics and medicines from carry-on luggage on domestic flights. The day before the cabin ban,the General Administration of Civil Aviation of China (CAAC) had announced it was stepping up safety checks ahead of the Olympic Games.

  7. Modelling of Bending of Windturbine Tower

    DEFF Research Database (Denmark)

    Andersen, Kurt

    1997-01-01

    Describes a model of a windturbine tower's transverse oscillation depending of turbulence in the wind.......Describes a model of a windturbine tower's transverse oscillation depending of turbulence in the wind....

  8. Siting Solar Photovoltaics at Airports: Preprint

    Energy Technology Data Exchange (ETDEWEB)

    Kandt, A.; Romero, R.

    2014-06-01

    Airports present a significant opportunity for hosting solar technologies due to their open land; based on a 2010 Federal Aviation Administration study, the US Department of Agriculture, and the US Fish and Wildlife Service, there's potential for 116,704 MW of solar photovoltaics (PV) on idle lands at US airports. PV has a low profile and likely low to no impact on flight operations. This paper outlines guidance for implementing solar technologies at airports and airfields, focusing largely on the Federal Aviation Administration's policies. The paper also details best practices for siting solar at airports, provides information on the Solar Glare Hazard Analysis Tool, and highlights a case study example where solar has been installed at an airport.

  9. 76 FR 490 - Marking Meteorological Evaluation Towers

    Science.gov (United States)

    2011-01-05

    ... Federal Aviation Administration 14 CFR Part 77 Marking Meteorological Evaluation Towers AGENCY: Federal.... SUMMARY: The FAA is considering revising its current Advisory Circular on Obstruction Marking and Lighting to include guidance for Meteorological Evaluation Towers (METs). These towers are erected in...

  10. Airport Delay and Improvement Study, John F. Kennedy International Airport and LaGuardia Airport.

    Science.gov (United States)

    1981-10-01

    LaGuardia Airport fb Current System Operation Aircraft delat has been ar integral part of the operationr or out presen s %tem of major huh airpnort,. Ru ri...iuardia %%henl Kcnnecd% is usingt thre Ruiiwa% 131 11 S. I it, pioposal riral. with the departure delav increasing h,, 3.5 minutes. Oserall. a delat ...genieral iatrioii actIisits. adds 5.7󈧥 additiontal I%TF;RIM AK k ORTErX %S rFEM mntes o t delat , at a Co st of S95.5-8 annual[%. Because of he os

  11. The solar towers of Chankillo

    CERN Document Server

    Sparavigna, Amelia Carolina

    2012-01-01

    An ancient solar observatory is composed by thirteen towers lined on a hill of a coastal desert of Peru. This is the Chankillo observatory. Here we discuss it, showing some simulations of the local sun direction. An analysis of the behaviour of shadows is also proposed.

  12. Good towers of function Fields

    DEFF Research Database (Denmark)

    Nguyen, Nhut

    of q. In this thesis, we study a construction using Drinfeld modules that produces explicitly defined families of algebraic curves that asymptotically achieve Ihara’s constant. Such families of curves can also be described using towers of function fields. Restated in this language the aim...

  13. 77 FR 22376 - Airport Improvement Program (AIP) Grant Assurances

    Science.gov (United States)

    2012-04-13

    .... Airport Revenues. a. All revenues generated by the airport and any local taxes on aviation fuel... airport, local taxes on aviation fuel) shall not apply. (2) If the Secretary approves the sale of a... Federal Aviation Administration Airport Improvement Program (AIP) Grant Assurances AGENCY:...

  14. 19 CFR 122.11 - Designation as international airport.

    Science.gov (United States)

    2010-04-01

    ... 19 Customs Duties 1 2010-04-01 2010-04-01 false Designation as international airport. 122.11...; DEPARTMENT OF THE TREASURY AIR COMMERCE REGULATIONS Classes of Airports § 122.11 Designation as international airport. (a) Procedure. International airports, as defined in § 122.1(e), will be designated after...

  15. 19 CFR 122.14 - Landing rights airport.

    Science.gov (United States)

    2010-04-01

    ... 19 Customs Duties 1 2010-04-01 2010-04-01 false Landing rights airport. 122.14 Section 122.14... TREASURY AIR COMMERCE REGULATIONS Classes of Airports § 122.14 Landing rights airport. (a) Permission to land. Permission to land at a landing rights airport may be given as follows: (1) Scheduled flight....

  16. 14 CFR 93.123 - High density traffic airports.

    Science.gov (United States)

    2010-01-01

    ... 14 Aeronautics and Space 2 2010-01-01 2010-01-01 false High density traffic airports. 93.123... (CONTINUED) AIR TRAFFIC AND GENERAL OPERATING RULES SPECIAL AIR TRAFFIC RULES High Density Traffic Airports § 93.123 High density traffic airports. (a) Each of the following airports is designated as a...

  17. 14 CFR 152.325 - Financial status report: Airport planning.

    Science.gov (United States)

    2010-01-01

    ... 14 Aeronautics and Space 3 2010-01-01 2010-01-01 false Financial status report: Airport planning... agency conducting a project for airport system planning shall submit a financial status report on a form... TRANSPORTATION (CONTINUED) AIRPORTS AIRPORT AID PROGRAM Accounting and Reporting Requirements § 152.325...

  18. Building designed granular towers one drop at a time

    Science.gov (United States)

    Chopin, Julien; Kudrolli, Arshad

    2012-02-01

    The impact of a drop on a surface leads to beautiful dynamical shapes that result from a subtle interplay between inertial effects, fluid properties and substrate characteristics. In this talk, we will present an experiment where the successive impacts of drops lead to surprisingly slender mechanically stable structures that we called granular towers. They are created by dripping a dense granular suspension on a liquid absorbing surface such as a blotter paper or a dry granular bed. These towers formed by rapid solidification of the drop upon impact are analogous to many natural structures found in nature including frozen lava flows, icicles and stalagmites. We find that the height can be determined by balancing the excess liquid flux and the drainage through the granular tower. The velocity impact, the free fall time and the density of the suspension are found to control the tower width and its detailed morphology. We show that these facts can be manipulated to obtain various symmetric, smooth, corrugated, zigzag, and chiral structures. Further, the shape of the tower can be used as a quick diagnostic tool to characterize the rheology of a granular suspension. [J. Chopin and A. Kudrolli, Phys. Rev. Lett. 107, 208304 (2011)

  19. 汽油分馏塔现场分段预制组焊质量控制%Quality Control of Sectional Pre-fabrication Fit-up Welding of Gasoline Fractionating Tower at Site

    Institute of Scientific and Technical Information of China (English)

    谭中毅; 李刚

    2012-01-01

    As one of critical equipments-the gasoline fractionating tower, the quality control is very important for an ethylene plant. Based on the fabrication scheme of sectional pre-fabrica-tion fit-up welding at site as well as the characteristic of equipment structure, the quality control key points were worked out. According to quality control measures aimed at the equipment are a-dopted and certain methods were used to ensure the quality of fit-up welding. It provides a reference for quality control of similar equipment for pre-fabrication fit-up welding at site.%作为乙烯装置中的关键设备之一——汽油分馏塔,其制造安装质量的重要性不言而喻.根据设备现场分段预制组焊的制造方案及设备的结构特点提出了汽油分馏塔的质量控制重点,并采取了针对性的措施保证了设备组焊的高质量,此经验可为同类设备现场组焊的质量控制提供一定的借鉴.

  20. 75 FR 9017 - Orders Limiting Scheduled Operations at John F. Kennedy International Airport, LaGuardia Airport...

    Science.gov (United States)

    2010-02-26

    ... CFR Sec. 93.227 (DCA); 74 FR 51648 (Oct. 7, 2009) (EWR); 74 FR 51650 (Oct. 7, 2009) (JFK); 74 FR 51653... Airport, LaGuardia Airport and Newark Liberty International Airport; High Density Rule at Reagan National Airport AGENCY: Federal Aviation Administration (FAA), DOT. ACTION: Notice of limited waiver of the...

  1. Feasibility of piezoelectric tiles adoption: A case study at Kuala Lumpur International Airport (KLIA) Malaysia

    Science.gov (United States)

    Chew, Boon Cheong; Loo, Heoy Shin; Bohari, Izyan Adilah; Hamid, Syaiful Rizal; Sukri, Fatin Hafizah; Kusumarwadani, Rini

    2017-03-01

    The basic function of an international airport is an aerodrome, provides not only the facilities for flights management, but also for customs and passport control. Nowadays, most of the international airports have established commercial outlets for food, products and services. As such, these airports are built with larger scale and more sophisticated on both infrastructure and infostructure which aim to be the most extensive air-travel service providers that connect the nations to the international gateways. Looking at the daily operations of an international airport, the energy consumption is apprehended to be enormous. Besides, knowing the fact that reliance on fossil fuels to power the airport buildings and to run the operations daily, this has led to many negative socioenvironmental implications. To date, some of the world major international airports have begun in renewable energy adoption-which mainly focused on solar energy as a way to reduce fossil energy consumption and towards greenhouse gases reduction. Inspired by thinking differently since solar energy has been adopted in Kuala Lumpur International Airport (KLIA) in 2014, through this study we proposed another form of renewable energy-piezoelectric technology adoption into our KLIA as a feasibility study. We believe that piezoelectric technology could complement the renewable energy mix, by tapping the crowd kinetic energy gathered internally in the airport buildings particularly at a few main entrances. Hence, the objectives of this study are (a) to examine the potential factors that will foster piezoelectric tiles adoption at KLIA and (b) to propose the ways for KLIA in speeding up piezoelectric tiles adoption within the airport terminals. The case study on the Malaysia Airports Holding Berhad (MAHB which manages the KLIA) was based on primary data collected through a series of qualitative focus group conducted on 14 (8 senior managers and 6 technical professionals) who were interested and supportive

  2. Dynamic capabilities in airport management : A study of Jönköping Airport

    OpenAIRE

    Tollén, Erik; Frånlund, Olof

    2010-01-01

    Background: The deregulation of the airline and airport sectors has introduced airport managers to free market competition. Purpose: The purpose of this thesis is to identify dynamic capabilities in a regional airport, examine which of the predominant views they correlate to and whether dynamic capabilities concern different levels of strategy. Method: This study uses a qualitative method. Data are collected through a documentary review and interview. The documentary review concerns the fea...

  3. 虹桥机场航管办公大楼热源塔热泵系统应用分析%Application analysis of the heat-source tower heat pump system in air traffic control tower of Hongqiao airport

    Institute of Scientific and Technical Information of China (English)

    夏学鹰; 李静

    2012-01-01

    介绍上海虹桥机场航管办公大楼热源塔热泵系统的应用,重点阐述了热源塔热泵系统的组成及工作原理、系统的改造方案、运行方式及经济性分析等,并总结了热源塔热泵系统在实际工程应用中的几点体会.

  4. Future Airportal Surveillance and Prediction Project

    Data.gov (United States)

    National Aeronautics and Space Administration — Recent advances in airport surface surveillance and other sensor, automation, and data sharing technologies now allow the consideration of a significant change in...

  5. Airports and Airfields, Published in unknown, SWGRC.

    Data.gov (United States)

    NSGIC GIS Inventory (aka Ramona) — This Airports and Airfields dataset as of unknown. Data by this publisher are often provided in Geographic coordinate system; in a Not Sure projection; The extent...

  6. Airport Gate Assignment: New Model and Implementation

    CERN Document Server

    Li, Chendong

    2008-01-01

    Airport gate assignment is of great importance in airport operations. In this paper, we study the Airport Gate Assignment Problem (AGAP), propose a new model and implement the model with Optimization Programming language (OPL). With the objective to minimize the number of conflicts of any two adjacent aircrafts assigned to the same gate, we build a mathematical model with logical constraints and the binary constraints, which can provide an efficient evaluation criterion for the Airlines to estimate the current gate assignment. To illustrate the feasibility of the model we construct experiments with the data obtained from Continental Airlines, Houston Gorge Bush Intercontinental Airport IAH, which indicate that our model is both energetic and effective. Moreover, we interpret experimental results, which further demonstrate that our proposed model can provide a powerful tool for airline companies to estimate the efficiency of their current work of gate assignment.

  7. CERN lands a slot at Geneva Airport

    CERN Multimedia

    2002-01-01

    From left to right:Carlo Lamprecht, Luciano Maiani and Jean-Pierre Jobin. When you step off your plane at Geneva Airport there's a good chance you'll come face-to-face with an advertising hoarding bearing the message 'CERN, the world's largest particle physics research laboratory, where the World Wide Web was born...five minutes from here'. This may be obvious to you, but it certainly isn't to the majority of the 7 million travellers who pass through the gates of Geneva Airport every year. On the initiative of the Chairman of its Board of Directors, State Councillor Carlo Lamprecht, Geneva International Airport has therefore come up with the idea of highlighting CERN's presence by giving the Laboratory its own hoarding. The hoarding was inaugurated on 24 May by Carlo Lamprecht, Airport Director Jean-Pierre Jobin and CERN Director-General Luciano Maiani.

  8. Research on the stiffening girder erection sequence of three-tower suspension bridge

    Institute of Scientific and Technical Information of China (English)

    Zheng Runqing; Luo Xiheng

    2012-01-01

    Compared to the conventional two-tower suspension bridge, the three-tower suspension bridge has obviously different characteristics in structural performance because of the extra middle tower and main span. The construction sequence for the stiffening girder is significantly different between the three-tower suspension bridge and the two-tower suspension bridge. The tangential angle of the main cable is one of the controlling factors of the stiffening girder erection stage for a suspension bridge. According to 5 feasible cases for the stiffening girder erection scheme in Taizhou Bridge, the research about the tangential angle in each case mentioned above was made, and some factors that should be taken into account for the erection scheme of stiffening girder were pointed out.

  9. Irreducibility of The Igusa Tower

    Institute of Scientific and Technical Information of China (English)

    Haruzo HIDA

    2009-01-01

    We shall give a simple (basically) purely in characteristic p proof of the irreducibility of the Igusa tower over Shimura varieties of PEL type. Our result covers Shimura variety of type A and type C classical groups, in particular, the Siegel modular varieties, the Hilbert-Siegel modular varieties, Picard surfaces and Shimura varieties of inner forms of unitary and symplectic groups over totally real fields.

  10. Ozone Treatment For Cooling Towers

    Science.gov (United States)

    Blackwelder, Rick; Baldwin, Leroy V.; Feeney, Ellen S.

    1990-01-01

    Report presents results of study of cooling tower in which water treated with ozone instead of usual chemical agents. Bacteria and scale reduced without pollution and at low cost. Operating and maintenance costs with treatment about 30 percent of those of treatment by other chemicals. Corrosion rates no greater than with other chemicals. Advantage of ozone, even though poisonous, quickly detected by smell in very low concentrations.

  11. Hybrid Tower, Designing Soft Structures

    DEFF Research Database (Denmark)

    Ramsgaard Thomsen, Mette; Tamke, Martin; Holden Deleuran, Anders;

    2015-01-01

    predictions about the inherent interdependency and material dependent performance of the hybrid structure and (2) the inter-scalar design strategies for specification and fabrication. The first investigation focuses on the design pipelines developed between the implementation of realtime physics...... (membrane reinforcement strategy) and micro scale (design of bespoke textile membrane). The paper concludes with a post construction analysis. Comparing structural and environmental data, the predicted and the actual performance of tower are evaluated and discussed....

  12. Airports and Airfields, To provide airports recognized by LA DOTD as "official" airports, Published in 2007, 1:24000 (1in=2000ft) scale, Louisiana State University.

    Data.gov (United States)

    NSGIC GIS Inventory (aka Ramona) — This Airports and Airfields dataset, published at 1:24000 (1in=2000ft) scale as of 2007. It is described as 'To provide airports recognized by LA DOTD as "official"...

  13. 2004 Savannah River Cooling Tower Collection (U)

    Energy Technology Data Exchange (ETDEWEB)

    Garrett, Alfred [Savannah River Site (SRS), Aiken, SC (United States). Savannah River National Lab. (SRNL); Parker, Matthew J. [Savannah River Site (SRS), Aiken, SC (United States). Savannah River National Lab. (SRNL); Villa-Aleman, E. [Savannah River Site (SRS), Aiken, SC (United States). Savannah River National Lab. (SRNL)

    2005-05-01

    The Savannah River National Laboratory (SRNL) collected ground truth in and around the Savannah River Site (SRS) F-Area cooling tower during the spring and summer of 2004. The ground truth data consisted of air temperatures and humidity inside and around the cooling tower, wind speed and direction, cooling water temperatures entering; inside adn leaving the cooling tower, cooling tower fan exhaust velocities and thermal images taken from helicopters. The F-Area cooling tower had six cells, some of which were operated with fans off during long periods of the collection. The operating status (fan on or off) for each of the six cells was derived from operations logbooks and added to the collection database. SRNL collected the F-Area cooling tower data to produce a database suitable for validation of a cooling tower model used by one of SRNL's customer agencies. SRNL considers the data to be accurate enough for use in a model validation effort. Also, the thermal images of the cooling tower decks and throats combined with the temperature measurements inside the tower provide valuable information about the appearance of cooling towers as a function of fan operating status and time of day.

  14. Self-assembled granular towers

    Science.gov (United States)

    Pacheco-Vazquez, Felipe; Moreau, Florian; Vandewalle, Nicolas; Dorbolo, Stephan; GroupResearch; Applications in Statistical Physics Team

    2013-03-01

    When some water is added to sand, cohesion among the grains is induced. In fact, only 1% of liquid volume respect to the total pore space of the sand is necessary to built impressive sandcastles. Inspired on this experience, the mechanical properties of wet piles and sand columns have been widely studied during the last years. However, most of these studies only consider wet materials with less than 35% of liquid volume. Here we report the spontaneous formation of granular towers produced when dry sand is poured on a highly wet sand bed: The impacting grains stick on the wet grains due to instantaneous liquid bridges created during the impact. The grains become wet by the capillary ascension of water and the process continues, giving rise to stable narrow sand towers. Actually, the towers can reach the maximum theoretical limit of stability predicted by previous models, only expected for low liquid volumes. The authors would like to thank FNRS and Conacyt Mexico for financial support. FPV is a beneficiary of a movility grant from BELSPO/Marie Curie and the University of Liege.

  15. A New Intelligent Airplane Landing Planning Method in Congested Airports

    Directory of Open Access Journals (Sweden)

    Kazem Dastgerdi

    2015-06-01

    Full Text Available Nowadays considering many advantages of air traveling, we notice that traffic congestion has significantly increased in airspace of countries, and it is expected that this growth rate, increases even more in the forthcoming years.This growth rate and different limitations posed on developing some airports led to the problem of landing airplanes to become one of the most important issues formed in the field of aviation. In this paper, in the form of a new approach based on CPSO algorithm for intelligent landing planning, determining optimal landing times, optimal allocation of runways, and at last the order of successive landings of planes has been done in a way that appropriately fulfills the main goal of the problem (minimizing the total flights delays; thus helping significantly to controlling air traffic congestion in airports approaches. The simulation results show that compared to the last presented methods, including methods based on genetic algorithms, GLS and Bionomic, has decreased the total amounts of flight delays considerably. Getting zero for total amount of flight delays for the two problems with real data of DFW airport in Texas, United States, confirms the more capability of CPSO algorithm compared to the other intelligent methods for obtaining optimal solutions to the problem.

  16. Energy Research in Airports: A Review

    Directory of Open Access Journals (Sweden)

    Sergio Ortega Alba

    2016-05-01

    Full Text Available The main function of an airport is to provide access to air transport both for passengers and cargo. The number of air operations over the past 20 years has increased rapidly, and this has led to a rise in the energy needs of airports to satisfy this demand. As a consequence, the cost of energy supply for airport managers has escalated. At the same time, global energy consumption has soared due to the needs of emerging countries like China and India, with the consequent environmental impact. This complex scenario of environmental and economic factors has made airport managers become aware of the need to reduce energy consumption as well as a more efficient use of it. The aim of this article is to analyze the main behaviors and energy trends at airports in more recent research, starting with the description of the main energy sources and consumers, the application of energy conservation and energy efficiency measures, the establishment of energy indicators and benchmarking between airports, as well as energy modeling and simulation.

  17. Airport Merchandising Using Micro Services Architecture

    Directory of Open Access Journals (Sweden)

    Hari Bhaskar Sankaranarayanan

    2016-06-01

    Full Text Available Airport offers an ecosystem where passengers, airlines, airport, and merchants meet under one roof during travel. During the journey, there is a good amount of time spent by passengers on waiting or transit before boarding the flight. Passengers look for spending that time by shopping, dining, and entertainment. Airport merchants and airlines look for merchandising opportunities to acquire new customers, up-sell, and cross-sell their products and services. Highly personalized merchandising offers can be generated on the fly by combining contextual information from passenger profile, likes and interests, merchant offers, and location specific events, seasons, and festivals. To achieve this, a strong airport merchandising platform is needed. The goal of the airport merchandising platform is to exchange information in a seamless manner across travel systems. The platform is designed on microservices design principles that use information from airlines, airport, social media, and merchant systems. Microservices can promote quick development, deployment, and realization of services. Microservices also improve the time to market capabilities. Mobile and desktop applications consume them to offer a personalized shopping experience to the passengers.

  18. STRATEGIC MARKET POSITION OF THE GDANSK AIRPORT

    Directory of Open Access Journals (Sweden)

    Henryk Ćwikliński

    2015-09-01

    Full Text Available Airports are a key link of the air transport infrastructure, which is a part of the whole transportation system. Their potential is determined by a network of airlines relations and affects the long-term, strategic position in the market of aviation services. The most possible scenario of the macro-environment of the Gdansk Airport has a relatively high predictability and generally positive influencing on the potential for development in the next years. Only international and demographic areas can constitute a barrier to achieving the strategic objectives. Gdansk Airport takes permanently the third position on the Polish market. Strategic gap analysis leads to the conclusion that, compared to its main competitors Airport Gdansk has a gap of compliance trends, but in relation to smaller regional airports excess gap. GDN services are located in the square "Star" in the BCG matrix. This airport has prepared an investment program till 2035. The dynamics of the projected increase in the number of passengers and air operations in Gdansk is generally slightly higher than the growth nationwide forecasts. The strategic challenge for next years will be to strengthen the status of the GDN as a Polish aviation gateway to Scandinavia.

  19. Airport mobile marketing as a channel to promote cross-selling

    Directory of Open Access Journals (Sweden)

    Lázaro Florido-Benítez

    2016-12-01

    Full Text Available Purpose: The purpose of this study is to analyze the airport mobile marketing and what elements have had a positive or negative influence in cross-selling via an airport app.  Design/methodology: For this analysis, a survey was conducted to users that use the Schiphol Amsterdam Airport app. A total of 103 questionnaires were analyzed using structural equation modeling.  Findings: This study found that security/control factor supplied by the mobile marketing tool to passengers at the airport, it has been demonstrated that it favours an increase in cross-selling. in addition, if an airport is perceived to have a good brand image, it will have a positive effect in cross-selling.  Originality/value: This paper is the first research that examines the impact of mobile marketing in airports. Smelling multiple products and services to the same client before, during, and post consumption  is a marketing technique that intends to (1 satisfy a client’s need and (2 increase a company’s profit by using cross-selling and other complementary services. Airline companies are experts in carrying out this activity, and airports have found that mobile applications are the perfect tool to increase their commercial profits. Offering complementary products and services is a very lucrative business, and a mobile device or smartphone are -- and will become -- the ideal medium to meet users’ demands as well as to improve the passenger experience.  Keywords: mobile marketing, cross-selling, information, security-control, image-perception, satisfaction, WOM

  20. Evaluating transmission towers potentials during ground faults

    Institute of Scientific and Technical Information of China (English)

    2008-01-01

    During ground faults on transmission lines, a number of towers near the fault are likely to acquire high potentials to ground. These tower voltages, if excessive, may present a hazard to humans and animals. This paper presents analytical methods in order to determine the transmission towers potentials during ground faults, for long and short lines. The author developed a global systematic approach to calculate these voltages, which are dependent of a number of factors. Some of the most important factors are: magnitudes of fault currents, fault location with respect to the line terminals, conductor arrangement on the tower and the location of the faulted phase, the ground resistance of the faulted tower, soil resistivity, number, material and size of ground wires. The effects of these factors on the faulted tower voltages have been also examined for different types of power lines.

  1. 'Towers in the Tempest' Computer Animation Submission

    Science.gov (United States)

    Shirah, Greg

    2008-01-01

    The following describes a computer animation that has been submitted to the ACM/SIGGRAPH 2008 computer graphics conference: 'Towers in the Tempest' clearly communicates recent scientific research into how hurricanes intensify. This intensification can be caused by a phenomenon called a 'hot tower.' For the first time, research meteorologists have run complex atmospheric simulations at a very fine temporal resolution of 3 minutes. Combining this simulation data with satellite observations enables detailed study of 'hot towers.' The science of 'hot towers' is described using: satellite observation data, conceptual illustrations, and a volumetric atmospheric simulation data. The movie starts by showing a 'hot tower' observed by NASA's Tropical Rainfall Measuring Mission (TRMM) spacecraft's three dimensional precipitation radar data of Hurricane Bonnie. Next, the dynamics of a hurricane and the formation of 'hot towers' are briefly explained using conceptual illustrations. Finally, volumetric cloud, wind, and vorticity data from a supercomputer simulation of Hurricane Bonnie are shown using volume techniques such as ray marching.

  2. 77 FR 30350 - Airport Improvement Program (AIP) Use of Mineral Revenue at Certain Airports

    Science.gov (United States)

    2012-05-22

    ... modifications to this assurance at 77 FR 22376. Specifically, paragraph (a)(3) of Sponsor Assurance 25 permits... Federal Aviation Administration Airport Improvement Program (AIP) Use of Mineral Revenue at Certain Airports AGENCY: Federal Aviation Administration (FAA), DOT. ACTION: Notice of guidance; opportunity...

  3. Airport Noise Tech Challenge Overview

    Science.gov (United States)

    Bridges, James

    2011-01-01

    The Supersonics Project, operating under NASA Aeronautics Mission Directorate#s Fundamental Aero Program, has been organized around the Technical Challenges that have historically precluded commercial supersonic flight. One of these Challenges is making aircraft that are capable of such high aerodynamic performance quiet enough around airports that they will not be objectionable. It is recognized that a successful civilian supersonic aircraft will be a system where many new technologies will come together, and for this to happen not only will new low noise propulsion concepts be required, but new engineering tools that predict the noise of the aircraft as these technologies are combined and compromised with the rest of the aircraft design. These are the two main objectives of the Airport Noise Tech Challenge. " ! As a Project in the Fundamental Aero Program, we work at a relatively low level of technology readiness. However, we have high level milestones which force us to integrate our efforts to impact systems-level activities. To keep the low-level work tied to delivering engineering tools and low-noise concepts, we have structured our milestones around development of the concepts and organized our activities around developing and applying our engineering tools to these concepts. The final deliverables in these milestones are noise prediction modules validated against the best embodiment of each concept. These will then be used in cross-disciplinary exercises to demonstrate the viability of aircraft designs to meet all the Technical Challenges. Some of the concepts being developed are shown: Fan Flow Diverters, Multi-jet Shielding, High-Aspect Ratio Embedded Nozzles, Plasma Actuated Instability Manipulation, Highly Variable Cycle Mixer- Ejectors, and Inverted Velocity Profiles. These concepts are being developed for reduced jet noise along with the design tools which describe how they perform when used in various aircraft configurations. Several key upcoming

  4. Cellular Phone Towers, Cell Towers, Published in unknown, Norton County Appraisal Office.

    Data.gov (United States)

    NSGIC GIS Inventory (aka Ramona) — This Cellular Phone Towers dataset, was produced all or in part from Other information as of unknown. It is described as 'Cell Towers'. Data by this publisher are...

  5. Verification of BModes: Rotary Beam and Tower Modal Analysis Code; Preprint

    Energy Technology Data Exchange (ETDEWEB)

    Bir, G.

    2010-04-01

    This paper describes verification of BModes, a finite-element code developed to provide coupled modes for the blades and tower of a wind turbine. The blades, which may be rotating or non-rotating, and the towers, whether onshore or offshore, are modeled using specialized 15-dof beam finite elements. Both blade and tower models allow a tip attachment, which is assumed to be rigid body with six moments of inertia, and a mass centroid that may be offset from the blade or tower axis. Examples of tip attachments are aerodynamic brakes for blades and nacelle-rotor subassembly for towers. BModes modeling allows for tower supports including tension wires, floating platforms, and monopiles on elastic foundations. Coupled modes (implying coupling of flap, lag, axial, and torsional motions) are required for modeling major flexible components in a modal-based, aeroelastic code such as FAST1. These are also required for validation of turbine models using experimental data, modal-based fatigue analysis, controls design, and understanding aeroelastic-stability behavior of turbines. Verification studies began with uniform tower models, with and without tip inertia, and progressed to realistic towers. For the floating turbine, we accounted for the effects of hydrodynamic inertia, hydrostatic restoring, and mooring lines stiffness. For the monopole-supported tower, we accounted for distributed hydrodynamic mass on the submerged part of the tower and for distributed foundation stiffness. Finally, we verified a model of a blade carrying tip mass and rotating at different speeds (verifications of other blade models, rotating or non-rotating, have been reported in another paper.) Verifications were performed by comparing BModes-generated modes with analytical results, if available, or with MSC.ADAMS results. All results in general show excellent agreement.

  6. Design of Fire Auto-alarm and Control System of the Container Tower for the Second-phase Project of Shanghai Waigaoqiao Port Area%上海外高桥港区二期工程集装箱调度中心火灾报警系统设计介绍

    Institute of Scientific and Technical Information of China (English)

    郭力清

    2000-01-01

    简要介绍上海外高桥港区二期工程集装箱调度中心火灾报警系统的设计及体会。%It briefly introduces design and understandings of the fire auto-alarm and control system of the Container Tower for the 2nd-phase Project of Shanghai Waigaoqiao Port Area.

  7. 佳木斯东郊机场鸟类资源及鸟击防控措施研究1)%Airport Bird Ecological Investigation and Measures of Prevention and Control of Bird Strike Dongjiao Jiamusi

    Institute of Scientific and Technical Information of China (English)

    吕冬云; 刘东海; 赵宇; 岳丽红; 周清波; 潘亭如; 周雪婷; 罗志文

    2013-01-01

      通过对佳木斯东郊机场围界内进行2年多的鸟类生态与环境调查,掌握了佳木斯机场的鸟类种类及其分布情况,分析了鸟类活动的规律。通过调查提出了适合佳木斯机场鸟击防范的措施,为保障佳木斯机场安全提供了技术支持。%By Jiamusi city eastern outskirts of the airport within the enclosures for more than 2 years of bird ecology and environmental investigations and the Jiamusi airport bird species and their distribution ,such as analysis of the laws of bird activity .Suitable for the Jiamusi city air‐port bird strike prevention measures through the investigation ,provided technical support for the protection of the safety of Jiamusi Airport .

  8. Solar Power Tower Design Basis Document, Revision 0

    Energy Technology Data Exchange (ETDEWEB)

    ZAVOICO,ALEXIS B.

    2001-07-01

    This report contains the design basis for a generic molten-salt solar power tower. A solar power tower uses a field of tracking mirrors (heliostats) that redirect sunlight on to a centrally located receiver mounted on top a tower, which absorbs the concentrated sunlight. Molten nitrate salt, pumped from a tank at ground level, absorbs the sunlight, heating it up to 565 C. The heated salt flows back to ground level into another tank where it is stored, then pumped through a steam generator to produce steam and make electricity. This report establishes a set of criteria upon which the next generation of solar power towers will be designed. The report contains detailed criteria for each of the major systems: Collector System, Receiver System, Thermal Storage System, Steam Generator System, Master Control System, and Electric Heat Tracing System. The Electric Power Generation System and Balance of Plant discussions are limited to interface requirements. This design basis builds on the extensive experience gained from the Solar Two project and includes potential design innovations that will improve reliability and lower technical risk. This design basis document is a living document and contains several areas that require trade-studies and design analysis to fully complete the design basis. Project- and site-specific conditions and requirements will also resolve open To Be Determined issues.

  9. Turbulence Structure in the Wake Region of a Meteorological Tower

    Science.gov (United States)

    Barthlott, Christian; Fiedler, Franz

    A meteorological tower significantly modifies the air flow, the mean windspeed and wind direction as well as the turbulencestructure of the air. Suchchanges can be noticed in particular in the wake region of the tower.Measurementson the 200 m tower ofForschungszentrum Karlsruhewere carried outusing Solent sonic anemometers in the lee of the towerand cup anemometers on both sides.In the wake region, spectral energydensity is increased in the high-frequency range. Superposition of this disturbance spectrum on the undisturbedspectrum yields a `knee' in the resulting spectrum. In the case of low turbulence intensity with stable stratification,a plateau with a constant energy content is observed in front of the knee.This effect is caused by the new production of turbulence energy from the mean flow as well as by an energy transfer fromlarger to smaller vortices. Power spectra in strongly stable conditionsshow a more rapid decrease of intensity in the region where the inertialsubrange is expected.The relevant scales of wake turbulence are derived from the maximum of the disturbance spectrum.Locations of the high-frequency peak do not depend on atmospheric stability,but are controlled mainly by mean wind speed.Apart from the reduction of the mean wind speed, the spectra and cospectra exhibit a strong anisotropy for such cases.The results demonstrate the significant influence of a tower on turbulence spectra in the wake region.

  10. Wind turbine tower for storing hydrogen and energy

    Science.gov (United States)

    Fingersh, Lee Jay

    2008-12-30

    A wind turbine tower assembly for storing compressed gas such as hydrogen. The tower assembly includes a wind turbine having a rotor, a generator driven by the rotor, and a nacelle housing the generator. The tower assembly includes a foundation and a tubular tower with one end mounted to the foundation and another end attached to the nacelle. The tower includes an in-tower storage configured for storing a pressurized gas and defined at least in part by inner surfaces of the tower wall. In one embodiment, the tower wall is steel and has a circular cross section. The in-tower storage may be defined by first and second end caps welded to the inner surface of the tower wall or by an end cap near the top of the tower and by a sealing element attached to the tower wall adjacent the foundation, with the sealing element abutting the foundation.

  11. Yeager Airport Hydrogen Vehicle Test Project

    Energy Technology Data Exchange (ETDEWEB)

    Davis, Williams [West Virginia University Research Corporation, Morgantown, WV (United States)

    2015-10-01

    The scope of this project was changed during the course of the project. Phase I of the project was designed to have the National Alternative Fuels Training Consortium (NAFTC), together with its partners, manage the Hydrogen Vehicle Test Project at the Yeager Airport in conjunction with the Central West Virginia Regional Airport Authority (CWVRAA) in coordination with the United States Department of Energy National Energy Technology Laboratory (U.S. DOE NETL). This program would allow testing and evaluation of the use of hydrogen vehicles in the state of West Virginia utilizing the hydrogen fueling station at Yeager Airport. The NAFTC and CWVRAA to raise awareness and foster a greater understanding of hydrogen fuel and hydrogen-powered vehicles through a targeted utilization and outreach and education effort. After initial implementation of the project, the project added, determine the source(s) of supply for hydrogen powered vehicles that could be used for the testing. After completion of this, testing was begun at Yeager Airport. During the course of the project, the station at Yeager Airport was closed and moved to Morgantown and the West Virginia University Research Corporation. The vehicles were then moved to Morgantown and a vehicle owned by the CWVRAA was purchased to complete the project at the new location. Because of a number of issues detailed in the report for DE-FE0002994 and in this report, this project did not get to evaluate the effectiveness of the vehicles as planned.

  12. Location of airports - selected quantitative methods

    Directory of Open Access Journals (Sweden)

    Agnieszka Merkisz-Guranowska

    2016-09-01

    Full Text Available Background: The role of air transport in  the economic development of a country and its regions cannot be overestimated. The decision concerning an airport's location must be in line with the expectations of all the stakeholders involved. This article deals with the issues related to the choice of  sites where airports should be located. Methods: Two main quantitative approaches related to the issue of airport location are presented in this article, i.e. the question of optimizing such a choice and the issue of selecting the location from a predefined set. The former involves mathematical programming and formulating the problem as an optimization task, the latter, however, involves ranking the possible variations. Due to various methodological backgrounds, the authors present the advantages and disadvantages of both approaches and point to the one which currently has its own practical application. Results: Based on real-life examples, the authors present a multi-stage procedure, which renders it possible to solve the problem of airport location. Conclusions: Based on the overview of literature of the subject, the authors point to three types of approach to the issue of airport location which could enable further development of currently applied methods.

  13. Northern New Mexico regional airport market feasibility

    Energy Technology Data Exchange (ETDEWEB)

    Drake, R.H.; Williams, D.S.

    1998-06-01

    This report is about the market for airline travel in northern New Mexico. Interest in developing a northern New Mexico regional airport has periodically surfaced for a number of years. The New Mexico State Legislature passed a memorial during the 1998 Second Session calling for the conduct of a study to determine the feasibility of building a new regional airport in NNM. This report is a study of the passenger market feasibility of such an airport. In addition to commercial passenger market feasibility, there are other feasibility issues dealing with siting, environmental impact, noise, economic impact, intermodal transportation integration, region-wide transportation services, airport engineering requirements, and others. These other feasibility issues are not analyzed in any depth in this report although none were discovered to be show-stoppers as a by-product of the authors doing research on the passenger market itself. Preceding the need for a detailed study of these other issues is the determination of the basic market need for an airport with regular commercial airline service in the first place. This report is restricted to an in-depth look at the market for commercial passenger air service in NNM. 20 figs., 8 tabs.

  14. ICAO's anti-SARS airport activities.

    Science.gov (United States)

    Finkelstein, Silvio; Curdt-Christiansen, Claus M

    2003-11-01

    To prevent SARS from spreading through air travel and in order to rebuild the confidence of the traveling public in the safety of air travel, ICAO has set up an "Anti-SARS Airport Evaluation Project." The first phase of this project was to develop a set of protective measures for international airports in affected areas to adopt and implement and then to send out, on the request of Contracting States, a team of inspectors to evaluate and assess airports and issue a "statement of evaluation" that the airport inspected complies with the ICAO anti-SARS protective measures. In cooperation with the World Health Organization (WHO), the first part of phase 1 was completed in early June this year, and the second part of phase 1 followed soon after. By mid-July, five international airports in Southeast Asia had been inspected and found to be in full compliance with the ICAO anti-SARS protective measures. The success of this ICAO project is believed to have contributed significantly to the recovery of international air travel and related industries now taking place. Phase 2 of the project is now being developed. It is aimed at preventing a resurgence of SARS, but it also contains elements to make the methodology developed applicable to future outbreaks of any other communicable disease in which the mode of transmission could involve aviation and/or the need to prevent the spread of the disease by air travel.

  15. INNOVATION OF AIRPORTS AND AERODROMES IN TRANSPORT

    Directory of Open Access Journals (Sweden)

    Tomasz BALCERZAK

    2016-03-01

    Full Text Available The paper attempts to characterize changes occurring in EU transport policy, taking into account innovation of airports and aerodromes. To face challenges like: increase in air traffic, ensuring safety of flight operations, regional development or requirements of passengers it is necessary to determine desired direction network of airports and aerodromes within the aviation policy, which is part of the national and European transport policy. Overview of national and EU studies, strategies and legislative plans enable to specify changes taking place in the EU aviation policy, as well as to create potential scenarios of its development with particular attention to the innovation of aerodromes and airports. Based on the above analysis it should be noted, that aims of the European institutions and agencies are: reduction amount of restrictive rules on general aviation (including GA aerodromes, spread concepts of multimodality and Small Aircraft Transport Systems, enhance competitiveness of the EU aviation sector but also reduction investment funding at airports. Conclusions may be a theoretical inspiration in the process of updating master plans of aerodromes and airports.

  16. Torre de control. aeropuerto de Fort Worth - Dallas - Texas – (EE. UU.

    Directory of Open Access Journals (Sweden)

    Becket, Welton

    1975-11-01

    Full Text Available The control tower consists of a low building and the actual tower. The 2,400 m2 surface space of the concrete base building is occupied by administrative offices, training facilities, shops and reception area. The structural system of the 60 m high tower is made up of 4 service cores, completed by a cabin and a control equipment level. The service cores are hollow modular units, equally of concrete, which house the elevator, stairs, power and communication cables. The cabin that crowns the tower is an 11-sided polygon. Immediately below it is the equipment level, formed by four quadrants the configuration of which guarantees 360 degree visibility. The control tower is the focal point and nerve centre of the activities at the airport.Está formada por un cuerpo bajo y la torre propiamente dicha. La base, realizada de hormigón, distribuye, en sus 2.400 m2 de superficie: oficinas administrativas, locales de enseñanza, tiendas y una zona de recepción. La torre, de 60 m de altura, se diseñó como un sistema estructural constituido por cuatro núcleos de servicio, rematada por una cabina y una planta para los equipos de control. Los núcleos son unidades modulares huecas, también de hormigón, que albergan en su interior un ascensor, las escaleras, las instalaciones de electricidad y comunicaciones. La cabina que corona el edificio es un polígono regular de once lados. Inmediatamente debajo de ella se encuentra el nivel de equipos, formado por cuatro cuadrantes cuya configuración asegura una visibilidad de 360°. La torre es el punto focal y centro neurálgico de todas las actividades del aeropuerto.

  17. Microscopic Analysis and Modeling of Airport Surface Sequencing Project

    Data.gov (United States)

    National Aeronautics and Space Administration — Although a number of airportal surface models exist and have been successfully used for analysis of airportal operations, only recently has it become possible to...

  18. ORGANIZATIONAL CHANGE FOR THE ENVIRONMENTALLY SUSTAINABLE AIRPORT MANAGEMENT

    Directory of Open Access Journals (Sweden)

    Vildan Durmaz

    2011-11-01

    Full Text Available Air transportation industry is a globally growing industry. As an inseparable part of this industry, airport management is also becoming more crucial issue to be dealt with. Airports offer economic and social benefits to the society, but also environmental impacts of airport operations are increasing due to high traffic growth. While airport capacity is increasing, airport operators are being responsible for mitigating environmental constraints. Today to implement airport environmental management system is seen as a critical way of solution. To ensure effective implementation of this system, an organizational change with definite roles, responsibilities and structure are needed. This study illustrates a way of organizational response to market forces and national regulations guiding the achievement of sustainable airports by determining the structure and the roles in an airport organization.

  19. Lidar Wind Profiler for the NextGen Airportal Project

    Data.gov (United States)

    National Aeronautics and Space Administration — The development of a standoff sensor that can measure 3D components of wind velocity in the vicinity of an airport has the potential to improve airport throughput,...

  20. Mechanical Properties of UHPFRC Joint for FORIDA Wind Turbine Tower

    DEFF Research Database (Denmark)

    Sørensen, Eigil Verner

    FORIDA Development, Vestas and Aalborg University are currently undertaking the project “FORIDA Hybrid Towers – The towers for next generation of wind turbines”, aiming to develop a new wind turbine tower structure (The FORIDA Tower) for very tall turbines. The tower is going to be a hybrid...... of materials combining steel and Ultra High Performance Fibre Reinforced Concrete (UHPFRC), applied as precast units. The FORIDA Tower is competitive regarding price, design, flexibility and durability....

  1. Optical sampling of the flux tower footprint

    Science.gov (United States)

    Gamon, J. A.

    2015-03-01

    The purpose of this review is to address the reasons and methods for conducting optical remote sensing within the flux tower footprint. Fundamental principles and conclusions gleaned from over two decades of proximal remote sensing at flux tower sites are reviewed. An organizing framework is the light-use efficiency (LUE) model, both because it is widely used, and because it provides a useful theoretical construct for integrating optical remote sensing with flux measurements. Multiple ways of driving this model, ranging from meteorological measurements to remote sensing, have emerged in recent years, making it a convenient conceptual framework for comparative experimental studies. New interpretations of established optical sampling methods, including the Photochemical Reflectance Index (PRI) and Solar-Induced Fluorescence (SIF), are discussed within the context of the LUE model. Multi-scale analysis across temporal and spatial axes is a central theme, because such scaling can provide links between ecophysiological mechanisms detectable at the level of individual organisms and broad patterns emerging at larger scales, enabling evaluation of emergent properties and extrapolation to the flux footprint and beyond. Proper analysis of sampling scale requires an awareness of sampling context that is often essential to the proper interpretation of optical signals. Additionally, the concept of optical types, vegetation exhibiting contrasting optical behavior in time and space, is explored as a way to frame our understanding of the controls on surface-atmosphere fluxes. Complementary NDVI and PRI patterns across ecosystems are offered as an example of this hypothesis, with the LUE model and light-response curve providing an integrating framework. We conclude that experimental approaches allowing systematic exploration of plant optical behavior in the context of the flux tower network provides a unique way to improve our understanding of environmental constraints and

  2. Optical sampling of the flux tower footprint

    Directory of Open Access Journals (Sweden)

    J. A. Gamon

    2015-03-01

    Full Text Available The purpose of this review is to address the reasons and methods for conducting optical remote sensing within the flux tower footprint. Fundamental principles and conclusions gleaned from over two decades of proximal remote sensing at flux tower sites are reviewed. An organizing framework is the light-use efficiency (LUE model, both because it is widely used, and because it provides a useful theoretical construct for integrating optical remote sensing with flux measurements. Multiple ways of driving this model, ranging from meteorological measurements to remote sensing, have emerged in recent years, making it a convenient conceptual framework for comparative experimental studies. New interpretations of established optical sampling methods, including the Photochemical Reflectance Index (PRI and Solar-Induced Fluorescence (SIF, are discussed within the context of the LUE model. Multi-scale analysis across temporal and spatial axes is a central theme, because such scaling can provide links between ecophysiological mechanisms detectable at the level of individual organisms and broad patterns emerging at larger scales, enabling evaluation of emergent properties and extrapolation to the flux footprint and beyond. Proper analysis of sampling scale requires an awareness of sampling context that is often essential to the proper interpretation of optical signals. Additionally, the concept of optical types, vegetation exhibiting contrasting optical behavior in time and space, is explored as a way to frame our understanding of the controls on surface–atmosphere fluxes. Complementary NDVI and PRI patterns across ecosystems are offered as an example of this hypothesis, with the LUE model and light-response curve providing an integrating framework. We conclude that experimental approaches allowing systematic exploration of plant optical behavior in the context of the flux tower network provides a unique way to improve our understanding of environmental

  3. Aspect Of Reliability In Airport Business Continuity Management

    Directory of Open Access Journals (Sweden)

    Kozłowski Michał

    2015-11-01

    Full Text Available The paper presents the issue of ensuring the continuity of the operation at the airport. Requirements and objectives relating to business continuity management have been defined in accordance with ISO 22301 international standard. Conducted a study of reliability issues operation of the airport. Defined the function of the reliability and operational readiness of the airport. Presented the concept of using function of operational readiness in the risk assessment for the continuity of the airport.

  4. Guidelines to improve airport preparedness against chemical and biological terrorism.

    Energy Technology Data Exchange (ETDEWEB)

    Edwards, Donna M.; Price, Phillip N. (Lawrence Berkeley National Laboratory, Berkeley, CA); Gordon, Susanna P.; Gadgil, Ashok (Lawrence Berkeley National Laboratory, Berkeley, CA)

    2005-05-01

    Guidelines to Improve Airport Preparedness Against Chemical and Biological Terrorism is a 100-page document that makes concrete recommendations on improving security and assessing vulnerable areas and helps its readers understand the nature of chemical and biological attacks. The report has been turned over to Airports Council International (ACI) and the American Association of Airport Executives (AAAE), two organizations that together represent the interests of thousands of airport personnel and facilities in the U.S. and around the world.

  5. Greywater production in airports : qualitative and quantitative assessment.

    OpenAIRE

    Couto, Eduardo de Aguiar do; Calijuri, Maria Lúcia; Assemany, Paula Peixoto; Santiago,Aníbal da Fonseca; Carvalho, Isabella de Castro

    2013-01-01

    Airport complexes are great water consumers where the adoption of reuse practices adapted to their particular characteristics may represent significant savings of financial and environmental resources. Greywater reuse is an important alternative for reducing potable water consumption in airports. The objective of this study was to assess the quality of greywater produced in airport environments and the reuse potential of such effluent. This study was developed in a mid-size airport in Brazil,...

  6. Green towers and green walls

    Energy Technology Data Exchange (ETDEWEB)

    Sharp, R. [Sharp and Diamond Landscape Architecture and Planning, Vancouver, BC (Canada)

    2006-07-01

    North American cities face many major environmental and health issues such as urban heat island effect, the intensity of storms, microclimate around buildings, imperviousness of sites, poor air quality and increases in respiratory disease. Several new technologies are starting to address global impacts and community level issues as well as the personal health and comfort of building occupants. These include green towers, living walls, vegetated rooftops and ecological site developments. This paper examined these forms of eco-development and presented their benefits. It discussed green walls in Japan; green towers in Malaysia, Singapore and Great Britain; green facades of climbing plants; active living walls in Canada; and passive living walls in France and Canada. It also discussed thermal walls; thematic walls; vertical gardens and structured wildlife habitat. Last, it presented testing, monitoring, research and conclusions. The Centre for the Advancement of Green Roof Technology is setting up a program to test thermal performance, to assess plant survival and to monitor green walls at the British Columbia Institute of Technology in Vancouver, Canada as much of the research out of Japan is only available in Japanese script. It was concluded that green architecture can provide shade, food, rainwater, shelter for wildlife and mimic natural systems. 15 refs.

  7. 76 FR 36983 - Marking Meteorological Evaluation Towers

    Science.gov (United States)

    2011-06-24

    ... terrain. Without a similar evaluation process, the FAA cannot recommend lighting for METs. It is important... Federal Aviation Administration 14 CFR Part 77 Marking Meteorological Evaluation Towers AGENCY: Federal... recommended guidance for the voluntary marking of Meteorological Evaluation Towers (METs) erected in...

  8. An Optimal Unramified Tower of Function Fields

    DEFF Research Database (Denmark)

    Brander, Kristian

    2008-01-01

    Efficient construction of long algebraic geometric--codes resulting from optimal towers of function fields is known to be difficult. In the following a tower which is both optimal and unramified after its third level, is investigated in the hope that its simple ramification structure can be explo...

  9. Atmospheric Extenction in Solar Tower Plants

    OpenAIRE

    2014-01-01

    Atmospheric attenuation of solar energy between heliostat and receiver in a solar tower plant can vary strongly with site and time - How strong can this loss be? - Which instruments can be used to measure this loss? - How can one connect accessible meteorological parameters with this loss? - Influence on output and design of Tower plants

  10. Air pollution simulation and geographical information systems (GIS) applied to Athens International Airport.

    Science.gov (United States)

    Theophanides, Mike; Anastassopoulou, Jane

    2009-07-01

    This study presents an improved methodology for analysing atmospheric pollution around airports using Gaussian-plume numerical simulation integrated with Geographical Information Systems (GIS). The new methodology focuses on streamlining the lengthy analysis process for Airport Environmental Impact Assessments by integrating the definition of emission sources, simulating and displaying the results in a GIS environment. One of the objectives of the research is to validate the methodology applied to the Athens International Airport, "Eleftherios Venizelos", to produce a realistic estimate of emission inventories, dispersion simulations and comparison to measured data. The methodology used a combination of the Emission Dispersion and Modelling System (EDMS) and the Atmospheric Dispersion and Modelling system (ADMS) to improve the analysis process. The second objective is to conduct numerical simulations under various adverse conditions (e.g. scenarios) and assess the dispersion in the surrounding areas. The study concludes that the use of GIS in environmental assessments provides a valuable advantage for organizing data and entering accurate geographical/topological information for the simulation engine. Emissions simulation produced estimates within 10% of published values. Dispersion simulations indicate that airport pollution will affect neighbouring cities such as Rafina and Loutsa. Presently, there are no measured controls in these areas. In some cases, airport pollution can contribute to as much as 40% of permissible EU levels in VOCs.

  11. A Cohort Study on Meniscal Lesions among Airport Baggage Handlers

    DEFF Research Database (Denmark)

    Mikkelsen, Sigurd; Brauer, Charlotte; Pedersen, Ellen Bøtker

    2016-01-01

    of unskilled men employed at Copenhagen Airport or in other companies in the metropolitan Copenhagen area from 1990 to 2012 (the Copenhagen Airport Cohort). The cohort at risk included 3,307 airport baggage handlers with heavy lifting and kneeling or squatting work tasks and 63,934 referents with a similar...

  12. 14 CFR 121.97 - Airports: Required data.

    Science.gov (United States)

    2010-01-01

    ... 14 Aeronautics and Space 3 2010-01-01 2010-01-01 false Airports: Required data. 121.97 Section 121... § 121.97 Airports: Required data. (a) Each certificate holder conducting domestic or flag operations must show that each route it submits for approval has enough airports that are properly equipped...

  13. 14 CFR 121.624 - ETOPS Alternate Airports.

    Science.gov (United States)

    2010-01-01

    ... 14 Aeronautics and Space 3 2010-01-01 2010-01-01 false ETOPS Alternate Airports. 121.624 Section... Alternate Airports. (a) No person may dispatch or release an airplane for an ETOPS flight unless enough ETOPS Alternate Airports are listed in the dispatch or flight release such that the airplane...

  14. 46 CFR 72.05-30 - Windows and airports.

    Science.gov (United States)

    2010-10-01

    ... 46 Shipping 3 2010-10-01 2010-10-01 false Windows and airports. 72.05-30 Section 72.05-30 Shipping... Structural Fire Protection § 72.05-30 Windows and airports. (a) For the purpose of this subpart, all glass in windows or airports shall be at least 1/4 inch thick. However, greater thickness may be required...

  15. 14 CFR 121.117 - Airports: Required data.

    Science.gov (United States)

    2010-01-01

    ... 14 Aeronautics and Space 3 2010-01-01 2010-01-01 false Airports: Required data. 121.117 Section... Operations § 121.117 Airports: Required data. (a) No certificate holder conducting supplemental operations may use any airport unless it is properly equipped and adequate for the proposed...

  16. Un Viaje al Aeropuerto (A Trip to the Airport).

    Science.gov (United States)

    Federal Aviation Administration (DOT), Washington, DC.

    This illustrated, bilingual Spanish-English intermediate reader describes a class trip to an airport, in which the class tours the airport, and learns about airport activities, the parts of an airplane, and other related topics. Each page of the text is illustrated with a drawing. The narrative is followed by a list of 24 suggested learning…

  17. 78 FR 53184 - Land Release for Penn Yan Airport

    Science.gov (United States)

    2013-08-28

    ... Federal Aviation Administration Land Release for Penn Yan Airport AGENCY: Federal Aviation Administration... requesting public comment on the Penn Yan Airport (PEO), Penn Yan, New York, Notice of Proposed Release from Aeronautical Use of approximately 0.069 +/- acres of airport property, to allow for...

  18. 77 FR 12905 - Land Release for Penn Yan Airport

    Science.gov (United States)

    2012-03-02

    ... Federal Aviation Administration Land Release for Penn Yan Airport AGENCY: Federal Aviation Administration... requesting public comment on the Penn Yan Airport (PEO), Penn Yan, New York, Notice of Proposed Release from Aeronautical Use of approximately 10.00 +/- acres of airport property, to allow for...

  19. 77 FR 17492 - Expansion of Global Entry to Additional Airports

    Science.gov (United States)

    2012-03-26

    ... selection process, and the initial airport locations. See 77 FR 5681 and 8 CFR 235.12. Travelers who wish to... SECURITY U.S. Customs and Border Protection Expansion of Global Entry to Additional Airports AGENCY: U.S... as Global Entry, at twenty major U.S. airports. Global Entry allows pre-approved,...

  20. 77 FR 27272 - Land Release for Dunkirk Airport

    Science.gov (United States)

    2012-05-09

    ... Federal Aviation Administration Land Release for Dunkirk Airport AGENCY: Federal Aviation Administration... requesting public comment on the Dunkirk Airport (DKK), Dunkirk, New York, Notice of Proposed Release from Aeronautical Use of approximately 2.666 +/- acres of airport property, to allow for...

  1. 77 FR 55895 - Permanent Closure of Cincinnati Blue Ash Airport

    Science.gov (United States)

    2012-09-11

    ... Federal Aviation Administration Permanent Closure of Cincinnati Blue Ash Airport AGENCY: Federal Aviation Administration (FAA), DOT. ACTION: Notice of permanent closure of Cincinnati Blue Ash Airport (ISZ). SUMMARY: The... Cincinnati advising that on August 29, 2012, it was permanently closing Cincinnati Blue Ash Airport...

  2. Airports, Hotel, and Ground Transportation Information | Division of Cancer Prevention

    Science.gov (United States)

    Airports in and near Washington, DC Reagan National (DCA)  Approximate 30 minute drive from Rockville* Has its own Metro stop on the blue and yellow lines in Virginia NOTE: This airport may be the closest and easiest option if not renting a car or do not want to pay for an airport cab/shuttle.   Dulles International (IAD) |

  3. 78 FR 48217 - Notice of Request To Release Airport Property

    Science.gov (United States)

    2013-08-07

    ... To Release Airport Property AGENCY: Federal Aviation Administration (FAA), DOT. ACTION: Notice of intent to rule on request to release airport property at the Ottumwa Regional Airport (OTM), Ottumwa....martin@faa.gov . The request to release property may be reviewed, by appointment, in person at this...

  4. Carbon Nanotube Tower-Based Supercapacitor

    Science.gov (United States)

    Meyyappan, Meyya (Inventor)

    2012-01-01

    A supercapacitor system, including (i) first and second, spaced apart planar collectors, (ii) first and second arrays of multi-wall carbon nanotube (MWCNT) towers or single wall carbon nanotube (SWCNT) towers, serving as electrodes, that extend between the first and second collectors where the nanotube towers are grown directly on the collector surfaces without deposition of a catalyst and without deposition of a binder material on the collector surfaces, and (iii) a porous separator module having a transverse area that is substantially the same as the transverse area of at least one electrode, where (iv) at least one nanotube tower is functionalized to permit or encourage the tower to behave as a hydrophilic structure, with increased surface wettability.

  5. Flux Sampling Errors for Aircraft and Towers

    Science.gov (United States)

    Mahrt, Larry

    1998-01-01

    Various errors and influences leading to differences between tower- and aircraft-measured fluxes are surveyed. This survey is motivated by reports in the literature that aircraft fluxes are sometimes smaller than tower-measured fluxes. Both tower and aircraft flux errors are larger with surface heterogeneity due to several independent effects. Surface heterogeneity may cause tower flux errors to increase with decreasing wind speed. Techniques to assess flux sampling error are reviewed. Such error estimates suffer various degrees of inapplicability in real geophysical time series due to nonstationarity of tower time series (or inhomogeneity of aircraft data). A new measure for nonstationarity is developed that eliminates assumptions on the form of the nonstationarity inherent in previous methods. When this nonstationarity measure becomes large, the surface energy imbalance increases sharply. Finally, strategies for obtaining adequate flux sampling using repeated aircraft passes and grid patterns are outlined.

  6. Preliminary study on the applicability of semi-geodesic winding in the design and manufacturing of composite towers

    Science.gov (United States)

    Kayran, A.; İbrahimoǧlu, C. S.

    2014-12-01

    During last twenty years, wind turbine manufacturers took the path of building larger machines to generate more electricity. However, the bigger the size became, the more material was required to support the loads, leading to great weight increases. Larger turbines and higher hub heights also resulted in larger tower base diameters which are limited considering their logistics. In many countries, the limit for transports with special permits maximizes the diameter to 4.5 metres. Considering this fact, the wind turbine market dominated by welded steel shell towers is looking for new structural solutions for their future turbines. Although, composite materials are not used as the structural material in the towers of today's turbines, the demand for larger wind turbines forces engineers to seek for alternative material systems with high specific strength and stiffness ratios to be used in towers. Inspired by the applicability of filament winding in tower production, in the present article we investigated the effect of semi-geodesic winding on the winding angle, thickness, stiffness coefficients and vibration characteristics of filament wound composite conical shells of revolution which simulate wind turbine towers at the structural level. Present study showed that the preset friction applied during semi-geodesic winding is an important design parameter which can be controlled to obtain gradually increasing thickness from tower top to the base of the tower, and favourably alter the dynamic characteristics of the composite towers.

  7. TMD对钢塔风振控制的优化设计%OPTIMIZATION DESIGN OF WIND-INDUCED VIBRATION CONTROL OF STEEL TV TOWER

    Institute of Scientific and Technical Information of China (English)

    刘学利; 王肇民

    2001-01-01

    提出了利用悬挂水箱作为调谐质量阻尼器来控制钢塔的风振,将TMD对钢塔的控制作用归结为结构阻尼的增加,并给出了TMD参数的优化设计方法。实例计算结果表明,提出的方法简便、实用,可应用于实际工程的设计中。%Tank is used to control wind-induced vibration of steel TV toweras pendulous tuned mass dampers. The influence of TMD is summed up as increasing structural damping, and optimization design method of TMD is given. The example shows that the method is simple and practical. It can be applied to the real project.

  8. 75 FR 60495 - Notice of Intent To Rule on Request To Release Airport Property at Monroe Regional Airport...

    Science.gov (United States)

    2010-09-30

    ... Federal Aviation Administration Notice of Intent To Rule on Request To Release Airport Property at Monroe Regional Airport, Monroe, LA AGENCY: Federal Aviation Administration (FAA) DOT. ACTION: Request for Public... Regional Airport under the provisions of Title 49, U.S.C. Section 47153(c). DATES: Comments must...

  9. 76 FR 30422 - Notice of Intent To Rule on Request To Release Airport Property at the Helena Regional Airport...

    Science.gov (United States)

    2011-05-25

    ... Federal Aviation Administration Notice of Intent To Rule on Request To Release Airport Property at the Helena Regional Airport, Helena, Montana AGENCY: Federal Aviation Administration (FAA), Department of Transportation (DOT). ACTION: Notice of Request to Release Airport Property. SUMMARY: The FAA proposes to...

  10. 78 FR 20168 - Notice of Intent To Rule on Request To Release Airport Property at the Boulder Municipal Airport...

    Science.gov (United States)

    2013-04-03

    ... Federal Aviation Administration Notice of Intent To Rule on Request To Release Airport Property at the Boulder Municipal Airport, Boulder, CO AGENCY: Federal Aviation Administration (FAA), DOT. ACTION: Notice of request to release airport property. SUMMARY: The FAA proposes to rule and invite public...

  11. 77 FR 12906 - Notice of Intent To Rule on Request To Release Airport Property at the Dubois Regional Airport...

    Science.gov (United States)

    2012-03-02

    ... Federal Aviation Administration Notice of Intent To Rule on Request To Release Airport Property at the Dubois Regional Airport, Reynoldsville, PA AGENCY: Federal Aviation Administration (FAA) DOT. ACTION: Notice of request to release airport property. SUMMARY: The FAA proposes to rule and invite...

  12. 76 FR 23854 - Notice of Intent To Rule on Request To Release Airport Property at the Dubois Regional Airport...

    Science.gov (United States)

    2011-04-28

    ... Federal Aviation Administration Notice of Intent To Rule on Request To Release Airport Property at the Dubois Regional Airport, Reynoldsville, PA AGENCY: Federal Aviation Administration (FAA) DOT. ACTION: Notice of request to release airport property. SUMMARY: The FAA proposes to rule and invite...

  13. 76 FR 19517 - Orders Limiting Scheduled Operations at John F. Kennedy International Airport, LaGuardia Airport...

    Science.gov (United States)

    2011-04-07

    ....\\1\\ \\1\\ 75 FR 9017 (Feb. 26, 2010). ATA also stated the National Oceanic and Atmospheric...\\ 14 CFR 93.227 (DCA); 74 FR 51648 (Oct. 7, 2009) (EWR); 74 FR 51650 (Oct. 7, 2009) (JFK); 74 FR 51653... Airport, LaGuardia Airport, and Newark Liberty International Airport; High Density Rule at Reagan...

  14. 75 FR 41922 - Notice of Intent To Rule on Request To Release Airport Property at Fort Smith Regional Airport...

    Science.gov (United States)

    2010-07-19

    ... Smith Regional Airport, Fort Smith, AR AGENCY: Federal Aviation Administration (FAA), DOT. ACTION... comment on the release of land at Fort Smith Regional Airport under the provisions of Title 49, U.S.C... comments submitted to the FM must be mailed or delivered to Mr. John Parker, Airport Director, Fort...

  15. Louisiana Airports, Geographic NAD83, FEMA (1997)[airports_FEMA_1997

    Data.gov (United States)

    Louisiana Geographic Information Center — This is is a point dataset for the locations and attributes of 20 Louisiana airports. The attributes include name, address, city, county (sic), state, phone,...

  16. Optimal Hybrid Renewable Airport Power System: Empirical Study on Incheon International Airport, South Korea

    Directory of Open Access Journals (Sweden)

    Seoin Baek

    2016-06-01

    Full Text Available In response to global energy problems (e.g., the oil crisis, the Fukushima accident, the Paris Agreement, the South Korean government has executed a strict renewable energy plan to decrease the country’s dependence on fossil fuel. Public facilities, such as international airports, which use substantial amounts of electricity, are the most in need of government regulation. In this study, we attempt to determine the optimal hybrid electricity generation system for South Korea’s largest airport: Incheon International Airport. In the analysis, we use three scenarios: the current load, 120% of the current load, and 140% of the current load, according to the plan to expand Incheon International Airport. According to the COE (cost of electricity and the NPC (net present cost of the result, it is economically feasible to completely cover the potential increase in the electric load with PV power. Government policy implications and limitations are discussed.

  17. Public Use Airports, Geographic WGS84, BTS (2006) [public_use_airports_BTS_2006

    Data.gov (United States)

    Louisiana Geographic Information Center — The Public Use Airports database is a geographic point database of aircraft landing facilities in the United States and U.S. Territories. Attribute data is provided...

  18. Public Use Airport Runways, Geographic WGS84, BTS (2006) [public_use_airport_runway_BTS_2006

    Data.gov (United States)

    Louisiana Geographic Information Center — The Public Use Airport Runways database is a geographic dataset of runways in the United States and US territories containing information on the physical...

  19. Mapping and Managing essential resource flows in airport regions - the case of Amsterdam Airport Schiphol

    NARCIS (Netherlands)

    Geldermans, R.J.; Wandl, A.; Van den Dobbelsteen, A.A.J.F.

    2014-01-01

    Metropolitan airports are focal points of large amounts of essential resource flows, such as energy, materials, water and food. These flows are predominantly linear, whilst externalising both the negative and positive impacts associated with them. Moreover, qualitative and quantitative understanding

  20. Ant Colony Algorithm and Simulation for Robust Airport Gate Assignment

    Directory of Open Access Journals (Sweden)

    Hui Zhao

    2014-01-01

    Full Text Available Airport gate assignment is core task for airport ground operations. Due to the fact that the departure and arrival time of flights may be influenced by many random factors, the airport gate assignment scheme may encounter gate conflict and many other problems. This paper aims at finding a robust solution for airport gate assignment problem. A mixed integer model is proposed to formulate the problem, and colony algorithm is designed to solve this model. Simulation result shows that, in consideration of robustness, the ability of antidisturbance for airport gate assignment scheme has much improved.

  1. Aircraft noise in the region of the Bucharest-Otopeni Airport. [noise pollution in airport environment

    Science.gov (United States)

    Costescu, M.; Gherghel, C.; Curtoglu, A.

    1974-01-01

    Aircraft noise, especially in the region adjoining airports, constitutes a problem that will be aggravated in the near future because of increasing aircraft traffic and the appearance of new types of large tonnage aircraft with continuously increasing powers and speeds. Criteria for the evaluation of aircraft noise are reported and some results of studies carried out in the region of Bucharest-Otopeni Airport are detailed.

  2. Airborne LIDAR point cloud tower inclination judgment

    Science.gov (United States)

    liang, Chen; zhengjun, Liu; jianguo, Qian

    2016-11-01

    Inclined transmission line towers for the safe operation of the line caused a great threat, how to effectively, quickly and accurately perform inclined judgment tower of power supply company safety and security of supply has played a key role. In recent years, with the development of unmanned aerial vehicles, unmanned aerial vehicles equipped with a laser scanner, GPS, inertial navigation is one of the high-precision 3D Remote Sensing System in the electricity sector more and more. By airborne radar scan point cloud to visually show the whole picture of the three-dimensional spatial information of the power line corridors, such as the line facilities and equipment, terrain and trees. Currently, LIDAR point cloud research in the field has not yet formed an algorithm to determine tower inclination, the paper through the existing power line corridor on the tower base extraction, through their own tower shape characteristic analysis, a vertical stratification the method of combining convex hull algorithm for point cloud tower scarce two cases using two different methods for the tower was Inclined to judge, and the results with high reliability.

  3. A Seminar On Shanghai Airport Airspace Held

    Institute of Scientific and Technical Information of China (English)

    2004-01-01

    <正>A seminar on Shanghai airport airspace, sponsored by the airport’s second-phase project headquarters and East China Air Traffic Administration, was held in Shanghai between March 21 and 23.Present at the seminar were Shanghai Vice-Mayor

  4. Best management practices for airport deicing stormwater.

    Science.gov (United States)

    Switzenbaum, M S; Veltman, S; Mericas, D; Wagoner, B; Schoenberg, T

    2001-06-01

    With the advent of new regulations concerning aircraft deicing and management of spent aircraft deicing fluids (ADFs), many airports now face the dual challenges of simultaneously maintaining public safety and protecting the environment. This paper provides a theoretical assessment of the potential environmental impact of stormwater runoff and offers detailed current information on alternative deicing fluid application methods and materials, collection and treatment practices.

  5. 32 CFR 644.428 - Airport property.

    Science.gov (United States)

    2010-07-01

    ... 32 National Defense 4 2010-07-01 2010-07-01 true Airport property. 644.428 Section 644.428 National Defense Department of Defense (Continued) DEPARTMENT OF THE ARMY (CONTINUED) REAL PROPERTY REAL ESTATE HANDBOOK Disposal Disposal of Fee-Owned Real Property and Easement Interests § 644.428...

  6. 78 FR 28278 - Operating Limitations at New York LaGuardia Airport

    Science.gov (United States)

    2013-05-14

    ... primary marketing air carrier in the case of AIR-21 small hub/nonhub airport slot exemptions; or to the... marketing control up to 5 business days after the actual operation. This post-transfer approval is limited..., charter, ferry, and positioning flights. Helicopter operations are excluded from the...

  7. 77 FR 30585 - Operating Limitations at New York LaGuardia Airport; Technical Amendment

    Science.gov (United States)

    2012-05-23

    ... January 1, 2007; to the primary marketing air carrier in the case of AIR-21 small hub/nonhub airport slot... marketing control up to 5 business days after the actual operation. This post-transfer approval is limited..., charter, ferry, and positioning flights. Helicopter operations are excluded from the...

  8. A Cohort Study on Meniscal Lesions among Airport Baggage Handlers.

    Directory of Open Access Journals (Sweden)

    Sigurd Mikkelsen

    Full Text Available Meniscal lesions are common and may contribute to the development of knee arthrosis. A few case-control and cross-sectional studies have identified knee-straining work as risk factors for meniscal lesions, but exposure-response relations and the role of specific exposures are uncertain, and previous results may be sensitive to reporting and selection bias. We examined the relation between meniscal lesions and cumulative exposure to heavy lifting in a prospective register-based study with complete follow-up and independent information on exposure and outcome. We established a cohort of unskilled men employed at Copenhagen Airport or in other companies in the metropolitan Copenhagen area from 1990 to 2012 (the Copenhagen Airport Cohort. The cohort at risk included 3,307 airport baggage handlers with heavy lifting and kneeling or squatting work tasks and 63,934 referents with a similar socioeconomic background and less knee-straining work. Baggage handlers lifted suitcases with an average weight of approximately 15 kg, in total approximately five tonnes during a 9-hour workday. The cohort was followed in the National Patient Register and Civil Registration System. The outcome was a first time hospital diagnosis or surgery of a meniscal lesion. Baggage handlers had a higher incidence of meniscal lesions than the referents. Within baggage handlers spline regression showed that the incidence rate ratio was 1.91 (95% confidence interval: 1.29-2.84 after five years as a baggage handler and then decreased slowly to reach unity after approximately 30 years, adjusted for effects of potential confounders. This relation between baggage handling and meniscal lesions was present for work on the apron which involves lifting in a kneeling or squatting position, but not in the baggage hall, which only involves lifting in standing positions. The results support that long-term heavy lifting in a kneeling or squatting position is a risk factor for the development of

  9. A Cohort Study on Meniscal Lesions among Airport Baggage Handlers.

    Science.gov (United States)

    Mikkelsen, Sigurd; Brauer, Charlotte; Pedersen, Ellen Bøtker; Alkjær, Tine; Koblauch, Henrik; Simonsen, Erik Bruun; Helweg-Larsen, Karin; Thygesen, Lau Caspar

    2016-01-01

    Meniscal lesions are common and may contribute to the development of knee arthrosis. A few case-control and cross-sectional studies have identified knee-straining work as risk factors for meniscal lesions, but exposure-response relations and the role of specific exposures are uncertain, and previous results may be sensitive to reporting and selection bias. We examined the relation between meniscal lesions and cumulative exposure to heavy lifting in a prospective register-based study with complete follow-up and independent information on exposure and outcome. We established a cohort of unskilled men employed at Copenhagen Airport or in other companies in the metropolitan Copenhagen area from 1990 to 2012 (the Copenhagen Airport Cohort). The cohort at risk included 3,307 airport baggage handlers with heavy lifting and kneeling or squatting work tasks and 63,934 referents with a similar socioeconomic background and less knee-straining work. Baggage handlers lifted suitcases with an average weight of approximately 15 kg, in total approximately five tonnes during a 9-hour workday. The cohort was followed in the National Patient Register and Civil Registration System. The outcome was a first time hospital diagnosis or surgery of a meniscal lesion. Baggage handlers had a higher incidence of meniscal lesions than the referents. Within baggage handlers spline regression showed that the incidence rate ratio was 1.91 (95% confidence interval: 1.29-2.84) after five years as a baggage handler and then decreased slowly to reach unity after approximately 30 years, adjusted for effects of potential confounders. This relation between baggage handling and meniscal lesions was present for work on the apron which involves lifting in a kneeling or squatting position, but not in the baggage hall, which only involves lifting in standing positions. The results support that long-term heavy lifting in a kneeling or squatting position is a risk factor for the development of symptomatic

  10. NASA Research on an Integrated Concept for Airport Surface Operations Management

    Science.gov (United States)

    Gupta, Gautam

    2012-01-01

    Surface operations at airports in the US are based on tactical operations, where departure aircraft primarily queue up and wait at the departure runways. There have been attempts to address the resulting inefficiencies with both strategic and tactical tools for metering departure aircraft. This presentation gives an overview of Spot And Runway Departure Advisor with Collaborative Decision Making (SARDA-CDM): an integrated strategic and tactical system for improving surface operations by metering departure aircraft. SARDA-CDM is the augmentation of ground and local controller advisories through sharing of flight movement and related operations information between airport operators, flight operators and air traffic control at the airport. The goal is to enhance the efficiency of airport surface operations by exchanging information between air traffic control and airline operators, while minimizing adverse effects on stakeholders and passengers. The presentation motivates the need for departure metering, and provides a brief background on the previous work on SARDA. Then, the concept of operations for SARDA-CDM is described. Then the preliminary results from testing the concept in a real-time automated simulation environment are described. Results indicate benefits such as reduction in taxiing delay and fuel consumption. Further, the preliminary implementation of SARDA-CDM seems robust for two minutes delay in gate push-back times.

  11. Wind towers architecture, climate and sustainability

    CERN Document Server

    Bahadori, Mehdi N; Sayigh, Ali

    2014-01-01

    This book offers a holistic treatment of wind towers, from their underlying scientific principles to design and operation. Includes suggestions for optimization based on the authors' own research findings from recent analytical studies.

  12. Critical point wetting drop tower experiment

    Science.gov (United States)

    Kaukler, W. F.; Tcherneshoff, L. M.; Straits, S. R.

    1984-01-01

    Preliminary results for the Critical Point Wetting CPW Drop Tower Experiment are produced with immiscible systems. Much of the observed phenomena conformed to the anticipated behavior. More drops will be needed to test the CPW theory with these immiscible systems.

  13. Dubai Tower%迪拜高塔

    Institute of Scientific and Technical Information of China (English)

    2005-01-01

    @@ The design for RMJM 83-storey Dubai Tower is a dynamic and elegantly proportioned skyscraper, rising over 400 metres above the Arabian Gulf. Situated at the prominent water' s edge, this crystalline glass tower is intended to provide an iconic and symbolic reference for Dubai in the neighbouring city of Doha, Qatar. The development will contain world-class retail, offices,hotel, serviced apartments and residential units.

  14. Offshore lattice tower; Gittermast im Meer

    Energy Technology Data Exchange (ETDEWEB)

    Vries, E. de [Smart Tower, Arnheim (Netherlands)

    2001-05-01

    The projected offshore wind park has turned out to be a challenge also for non-experts in wind power. A new tower construction was developed in the Netherlands. The contribution points out the advantages of a concrete lattice tower. [German] Die geplante Errichtung von Windparks auf See fordert jetzt auch branchenfremde Ingenieurbueros heraus. In den Niederlanden wurde nun ein voellig neuer Turm entwickelt. Im Beitrag werden die Vorteile der Verwendung eines Betongittermastes aufgezaehlt. (orig.)

  15. Characterization and Analysis of Energy Demand Patterns in Airports

    Directory of Open Access Journals (Sweden)

    Sergio Ortega Alba

    2017-01-01

    Full Text Available Airports in general have high-energy consumption. Influenced by many factors, the characteristics of airport energy consumption are stochastic, nonlinear and dynamic. In recent years, airport managers have made huge efforts to harmonize airport operation with environmental sustainability by minimizing the environmental impact, with energy conservation and energy efficiency as one of their pillars. A key factor in order to reduce energy consumption at airports is to understand the energy use and consumption behavior, due to the multiple parameters and singularities that are involved. In this article, a 3-step methodology based on monitoring methods is proposed to characterize and analyze energy demand patterns in airports through their electric load profiles, and is applied to the Seve Ballesteros-Santander Airport (Santander, Spain. This methodology can be also used in airports in order to determine the way energy is used, to establish the classification of the electrical charges based on their operation way as well as to determine the main energy consumers and main external influencers. Results show that airport present a daily energy demand pattern since electric load profiles follow a similar curve shape for every day of the year, having a great dependence of the terminal building behavior, the main energy consumer of the airport, and with heating, ventilation and air conditioning (HVAC and lighting being the most energy-intensive facilities, and outside temperature and daylighting the main external influencers.

  16. 77 FR 73310 - Technical Amendment to List of User Fee Airports: Addition of Bozeman Yellowstone International...

    Science.gov (United States)

    2012-12-10

    ... Airports: Addition of Bozeman Yellowstone International Airport, Belgrade, MT AGENCY: U.S. Customs and... user fee airports to reflect the recent user fee airport designation for Bozeman Yellowstone... approving the designation of user fee status for Bozeman Yellowstone International Airport was signed...

  17. 14 CFR 121.197 - Airplanes: Turbine engine powered: Landing limitations: Alternate airports.

    Science.gov (United States)

    2010-01-01

    ... limitations: Alternate airports. 121.197 Section 121.197 Aeronautics and Space FEDERAL AVIATION ADMINISTRATION... airports. No person may list an airport as an alternate airport in a dispatch or flight release for a... obstruction clearance plane and the runway. In the case of an alternate airport for departure, as provided...

  18. Objective Lightning Probability Forecasts for East-Central Florida Airports

    Science.gov (United States)

    Crawford, Winfred C.

    2013-01-01

    The forecasters at the National Weather Service in Melbourne, FL, (NWS MLB) identified a need to make more accurate lightning forecasts to help alleviate delays due to thunderstorms in the vicinity of several commercial airports in central Florida at which they are responsible for issuing terminal aerodrome forecasts. Such forecasts would also provide safer ground operations around terminals, and would be of value to Center Weather Service Units serving air traffic controllers in Florida. To improve the forecast, the AMU was tasked to develop an objective lightning probability forecast tool for the airports using data from the National Lightning Detection Network (NLDN). The resulting forecast tool is similar to that developed by the AMU to support space launch operations at Kennedy Space Center (KSC) and Cape Canaveral Air Force Station (CCAFS) for use by the 45th Weather Squadron (45 WS) in previous tasks (Lambert and Wheeler 2005, Lambert 2007). The lightning probability forecasts are valid for the time periods and areas needed by the NWS MLB forecasters in the warm season months, defined in this task as May-September.

  19. Avanex Unique Endophyte Technology: Reduced Insect Food Source at Airports.

    Science.gov (United States)

    Pennell, Christopher G L; Popay, Alison J; Rolston, M Philip; Townsend, Richard J; Lloyd-West, Catherine M; Card, Stuart D

    2016-02-01

    Birds and other forms of wildlife are a major issue for airport authorities worldwide, as they can create hazards to operating aircraft. Wildlife "strikes," the majority caused by birds, can cause damage to operating aircraft and in severe cases lead to a loss of human life. Many airfields contain large areas of ground cover herbage alongside their runways that consist of mixtures of grasses, legumes, and weeds that can harbor many invertebrates. Many airfields use insecticides to control insect populations; however, mounting pressure from regional councils and water boards aim to reduce this practice due to ground water runoff and contamination concerns. Avanex Unique Endophyte Technology, a product specifically developed to reduce the attractiveness of airports and surrounding areas to birds, is based on a novel association between a selected strain of Epichloë endophyte and a turf-type tall fescue cultivar. This grass-endophyte association acts through a direct mechanism whereby a negative response in birds is created through taste aversion and postingestion feedback as well as an indirect mechanism by deterring many invertebrates, a food source of many bird species.

  20. Performance Evaluation of the Approaches and Algorithms for Hamburg Airport Operations

    Science.gov (United States)

    Zhu, Zhifan; Okuniek, Nikolai; Gerdes, Ingrid; Schier, Sebastian; Lee, Hanbong; Jung, Yoon

    2016-01-01

    The German Aerospace Center (DLR) and the National Aeronautics and Space Administration (NASA) have been independently developing and testing their own concepts and tools for airport surface traffic management. Although these concepts and tools have been tested individually for European and US airports, they have never been compared or analyzed side-by-side. This paper presents the collaborative research devoted to the evaluation and analysis of two different surface management concepts. Hamburg Airport was used as a common test bed airport for the study. First, two independent simulations using the same traffic scenario were conducted: one by the DLR team using the Controller Assistance for Departure Optimization (CADEO) and the Taxi Routing for Aircraft: Creation and Controlling (TRACC) in a real-time simulation environment, and one by the NASA team based on the Spot and Runway Departure Advisor (SARDA) in a fast-time simulation environment. A set of common performance metrics was defined. The simulation results showed that both approaches produced operational benefits in efficiency, such as reducing taxi times, while maintaining runway throughput. Both approaches generated the gate pushback schedule to meet the runway schedule, such that the runway utilization was maximized. The conflict-free taxi guidance by TRACC helped avoid taxi conflicts and reduced taxiing stops, but the taxi benefit needed be assessed together with runway throughput to analyze the overall performance objective.

  1. Wind Turbine Tower Vibration Modeling and Monitoring by the Nonlinear State Estimation Technique (NSET

    Directory of Open Access Journals (Sweden)

    Peng Guo

    2012-12-01

    Full Text Available With appropriate vibration modeling and analysis the incipient failure of key components such as the tower, drive train and rotor of a large wind turbine can be detected. In this paper, the Nonlinear State Estimation Technique (NSET has been applied to model turbine tower vibration to good effect, providing an understanding of the tower vibration dynamic characteristics and the main factors influencing these. The developed tower vibration model comprises two different parts: a sub-model used for below rated wind speed; and another for above rated wind speed. Supervisory control and data acquisition system (SCADA data from a single wind turbine collected from March to April 2006 is used in the modeling. Model validation has been subsequently undertaken and is presented. This research has demonstrated the effectiveness of the NSET approach to tower vibration; in particular its conceptual simplicity, clear physical interpretation and high accuracy. The developed and validated tower vibration model was then used to successfully detect blade angle asymmetry that is a common fault that should be remedied promptly to improve turbine performance and limit fatigue damage. The work also shows that condition monitoring is improved significantly if the information from the vibration signals is complemented by analysis of other relevant SCADA data such as power performance, wind speed, and rotor loads.

  2. Cellular Phone Towers - TOWERS_CELLUAR_FCC_ULS_IN: Cellular Towers in Indiana (Bernardin, Lochmueller & Associates, Derived from FCC ULS, Point Shapefile)

    Data.gov (United States)

    NSGIC GIS Inventory (aka Ramona) — This dataset is a point shapefile of licensed cellular towers downloaded as part of the FCC ULS database of cellular towers in Indiana. The ground condition of this...

  3. New terminal of Beijing Capial International Airport

    Institute of Scientific and Technical Information of China (English)

    2000-01-01

    THE extension of the terminal at the Beijing Capital International Airport, one of the key construction projects of the Ninth National Five Year Plan, was completed successfully in September 1999. The Hshaped new terminal building covers a total area of 336 thousand square meters -- four times that of the old one. It stands three floors above ground (part of it four floors) and one floor underground. Its opening upgrades peak time passenger

  4. Hotellipaketin suunnittelu Case: Hilton Helsinki Airport

    OpenAIRE

    Kyrö, Niina; Grönqvist, Henna

    2014-01-01

    Tämän opinnäytetyön aiheena oli hotellipaketin suunnittelu, joka toteutettiin toimeksiantona kansainväliseen Hilton -ketjuun kuuluvalle Hilton Helsinki Airportille. Hilton Helsinki Airport tarjoaa täyden palvelun hotellina asiakkailleen majoitus-, kokous- ja ravintolapalveluita. Opinnäytetyö oli toiminnallinen. Sen tavoitteena oli tuottaa toteuttamiskelpoinen hotellipaketti. Työn tarkoituksena oli luoda lisäarvoa toimeksiantajan hotellipakettitarjontaan ja edistää hotellin asiakastyytyväisyyt...

  5. Airport testing an explosives detection portal

    Energy Technology Data Exchange (ETDEWEB)

    Rhykerd, C.; Linker, K.; Hannum, D.; Bouchier, F.; Parmeter, J.

    1998-08-01

    At the direction of the US Congress, following the Pan Am 103 and TWA 800 crashes, the Federal Aviation Administration funded development of non-invasive techniques to screen airline passengers for explosives. Such an explosives detection portal, developed at Sandia National Laboratories, was field tested at the Albuquerque International airport in September 1997. During the 2-week field trial, 2,400 passengers were screened and 500 surveyed. Throughput, reliability, maintenance and sensitivity were studied. Follow-up testing at Sandia and at Idaho National Engineering and Environmental Laboratory was conducted. A passenger stands in the portal for five seconds while overhead fans blow air over his body. Any explosive vapors or dislodged particles are collected in vents at the feet. Explosives are removed from the air in a preconcentrator and subsequently directed into an ion mobility spectrometer for detection. Throughput measured 300 passengers per hour. The non-invasive portal can detect subfingerprint levels of explosives residue on clothing. A survey of 500 passengers showed a 97% approval rating, with 99% stating that such portals, if effective, should be installed in airports to improve security. Results of the airport test, as well as operational issues, are discussed.

  6. 76 FR 78529 - Establishment of Class D and E Airspace and Amendment of Class E; Brooksville, FL

    Science.gov (United States)

    2011-12-19

    ... Brooksville, FL, to accommodate a new air traffic control tower at Hernando County Airport This action... accommodate a new air traffic control tower at Hernando County Airport (76 FR 55298). Interested parties were... including 1,500 feet MSL within a 5.1-mile radius of Hernando County Airport, Brooksville, FL, and Class...

  7. The accessibility of European regions and airport network

    OpenAIRE

    Redondi, Renato; Malighetti, Paolo; Paleari, Stefano

    2011-01-01

    The objective of this work is to evaluate the accessibility of European municipalities by ground and air transportation. We compute the quickest paths between any origin municipality and any destination municipality separated by more than 500 km. The total travel time includes three components: i) travel by car to reach the origin airport; ii) travel by air from the origin airport to the destination airport, including waiting times when no direct flight is available; and iii) travel by car fr...

  8. Aerodynamical errors on tower mounted wind speed measurements due to the presence of the tower

    Energy Technology Data Exchange (ETDEWEB)

    Bergstroem, H. [Uppsala Univ. (Sweden). Dept. of Meteorology; Dahlberg, J.Aa. [Aeronautical Research Inst. of Sweden, Bromma (Sweden)

    1996-12-01

    Field measurements of wind speed from two lattice towers showed large differences for wind directions where the anemometers of both towers should be unaffected by any upstream obstacle. The wind speed was measured by cup anemometers mounted on booms along the side of the tower. A simple wind tunnel test indicates that the boom, for the studied conditions, could cause minor flow disturbances. A theoretical study, by means of simple 2D flow modelling of the flow around the mast, demonstrates that the tower itself could cause large wind flow disturbances. A theoretical study, based on simple treatment of the physics of motion of a cup anemometer, demonstrates that a cup anemometer is sensitive to velocity gradients across the cups and responds clearly to velocity gradients in the vicinity of the tower. Comparison of the results from the theoretical study and field tests show promising agreement. 2 refs, 8 figs

  9. A STUDY ON LEGIONELLA PNEUMOPHILA, WATER CHEMISTRY, AND ATMOSPHERIC CONDITIONS IN COOLING TOWERS AT THE SAVANNAH RIVER SITE

    Energy Technology Data Exchange (ETDEWEB)

    Smith, C.; Brigmon, R.

    2009-10-20

    Legionnaires disease is a pneumonia caused by the inhalation of the bacterium Legionella pneumophila. The majority of illnesses have been associated with cooling towers since these devices can harbor and disseminate the bacterium in the aerosolized mist generated by these systems. Historically, Savannah River Site (SRS) cooling towers have had occurrences of elevated levels of Legionella in all seasons of the year and in patterns that are difficult to predict. Since elevated Legionella in cooling tower water are a potential health concern a question has been raised as to the best control methodology. In this work we analyze available chemical, biological, and atmospheric data to determine the best method or key parameter for control. The SRS 4Q Industrial Hygiene Manual, 4Q-1203, 1 - G Cooling Tower Operation and the SRNL Legionella Sampling Program, states that 'Participation in the SRNL Legionella Sampling Program is MANDATORY for all operating cooling towers'. The resulting reports include L. pneumophila concentration information in cells/L. L. pneumophila concentrations >10{sup 7} cells/L are considered elevated and unsafe so action must be taken to reduce these densities. These remedial actions typically include increase biocide addition or 'shocking'. Sometimes additional actions are required if the problem persists including increase tower maintenance (e.g. cleaning). Evaluation of 14 SRS cooling towers, seven water quality parameters, and five Legionella serogroups over a three-plus year time frame demonstrated that cooling tower water Legionella densities varied widely though out this time period. In fact there was no one common consistent significant variable across all towers. The significant factors that did show up most frequently were related to suspended particulates, conductivity, pH, and dissolved oxygen, not chlorine or bromine as might be expected. Analyses of atmospheric data showed that there were more frequent significant

  10. Physical environment. [environmental impact statement required for general aviation airport construction

    Science.gov (United States)

    1975-01-01

    Environmental legislation affecting airports and the more common environmental effects resulting from airport construction are discussed with special emphasis on general aviation airports. The discussion is focused on the regulation of noise, pollution, and water quality.

  11. 77 FR 38705 - Draft Specification for Airport Light Bases, Transformer Housings, Junction Boxes, and...

    Science.gov (United States)

    2012-06-28

    ... Federal Aviation Administration Draft Specification for Airport Light Bases, Transformer Housings... comment on the Draft ``Specification for Airport Light Bases, Transformer Housings, Junction Boxes, and... recommendations for airport light bases, transformer housings, junction boxes and accessories. The FAA has...

  12. Airport Surface Management Tools for NAS Users Project

    Data.gov (United States)

    National Aeronautics and Space Administration — Decision support tools that make use of surface surveillance technologies data can potentially make it possible to increase airport throughput, better accommodate...

  13. A Review of Lean Management Models at King Khaled International Airport (KKIA

    Directory of Open Access Journals (Sweden)

    Tareq Al Muhareb

    2012-07-01

    Full Text Available This study evaluates processes of enhancing service quality that is provided to airports’ customers. Applying lean practices can assure the enhancement of service quality from the customers’ perspective. Through this study King Khalid International Airport (KKIA has been chosen for the purpose of enhancing the passenger’s flow, by applying two Lean practices, which are SERVQUAL and Lean Six Sigma ‘DMAIC’ or Define, Measure, Analyze, Improve and Control. These two practices are chosen because SERVQUAL is described as one of the best Lean’s methods as it use five stages to evaluate them and improve service quality and DMAIC used for the purpose of enhancing the Level of Service (LOS which can be applied in airports. Through this study, several studies about applying Lean algorithms in International Airports for improving performance and LOS have been reviewed. This study also reviewed the effects of applying these practices specially SERVQUAL and DMAIC on these airports and how they enhanced and improved the overall level of service.

  14. The Drop Tower Bremen -An Overview

    Science.gov (United States)

    von Kampen, Peter; Könemann, Thorben; Rath, Hans J.

    The Center of Applied Space Technology and Microgravity (ZARM) was founded in 1985 as an institute of the University of Bremen, which focuses on research on gravitational and space-related phenomena. In 1988, the construction of ZARM`s drop tower began. Since its inau-guration in September 1990, the eye-catching Drop Tower Bremen with a height of 146m and its characteristic glass roof has become twice a landmark on the campus of the University of Bremen and the emblem of the technology park Bremen. As such an outstanding symbol of space science in Bremen the drop tower provides an european unique facility for experiments under conditions of high-quality weightlessness with residual gravitational accelerations in the microgravity regime. The period of maximum 4.74s of each freely falling experiment at the Drop Tower Bremen is only limited by the height of the drop tower vacuum tube, which was fully manufactured of steal and enclosed by an outer concrete shell. Thus, the pure free fall height of each microgravity drop experiment is approximately 110m. By using the later in-stalled catapult system established in 2004 ZARM`s short-term microgravity laboratory is able to nearly double the time of free fall. This world-wide inimitable capsule catapult system meets scientists` demand of extending the period of weightlessness. During the catapult operation the experiment capsule performs a vertical parabolic flight within the drop tower vacuum tube. In this way the time of microgravity can be extended to slightly over 9s. Either in the drop or in the catapult operation routine the repetition rates of microgravity experiments at ZARM`s drop tower facility are the same, generally up to 3 times per day. In comparison to orbital platforms the ground-based laboratory Drop Tower Bremen represents an economic alternative with a permanent access to weightlessness on earth. Moreover, the exceptional high quality of weightlessness in order of 1e-6 g (in the frequency range below 100

  15. FIELD EXPERIMENTS AND MODELING AT CDG AIRPORTS

    Science.gov (United States)

    Ramaroson, R.

    2009-12-01

    Richard Ramaroson1,4, Klaus Schaefer2, Stefan Emeis2, Carsten Jahn2, Gregor Schürmann2, Maria Hoffmann2, Mikhael Zatevakhin3, Alexandre Ignatyev3. 1ONERA, Châtillon, France; 4SEAS, Harvard University, Cambridge, USA; 2FZK, Garmisch, Germany; (3)FSUE SPbAEP, St Petersburg, Russia. 2-month field campaigns have been organized at CDG airports in autumn 2004 and summer 2005. Air quality and ground air traffic emissions have been monitored continuously at terminals and taxi-runways, along with meteorological parameters onboard trucks and with a SODAR. This paper analyses the commercial engine emissions characteristics at airports and their effects on gas pollutants and airborne particles coupled to meteorology. LES model results for PM dispersion coupled to microphysics in the PBL are compared to measurements. Winds and temperature at the surface and their vertical profiles have been stored with turbulence. SODAR observations show the time-development of the mixing layer depth and turbulent mixing in summer up to 800m. Active low level jets and their regional extent have been observed and analyzed. PM number and mass size distribution, morphology and chemical contents are investigated. Formation of new ultra fine volatile (UFV) particles in the ambient plume downstream of running engines is observed. Soot particles are mostly observed at significant level at high power thrusts at take-off (TO) and on touch-down whereas at lower thrusts at taxi and aprons ultra the UFV PM emissions become higher. Ambient airborne PM1/2.5 is closely correlated to air traffic volume and shows a maximum beside runways. PM number distribution at airports is composed mainly by volatile UF PM abundant at apron. Ambient PM mass in autumn is higher than in summer. The expected differences between TO and taxi emissions are confirmed for NO, NO2, speciated VOC and CO. NO/NO2 emissions are larger at runways due to higher power. Reactive VOC and CO are more produced at low powers during idling at

  16. Tilts of the Master Equatorial Tower

    Science.gov (United States)

    Ahlstrom, H. G., Jr.; Gawronski, W.; Girdner, D.; Noskoff, E.; Sommerville, J. N.

    2000-07-01

    At the center of the DSS-14 antenna, a tower reaches to the focal point of the antenna dish. The master equatorial (ME) instrument is located at the top of the tower. This instrument precisely (with an accuracy that exceeds that of the antenna) follows the commanded trajectory. Through the optical coupling, the antenna focal point follows the ME. One factor of the antenna pointing precision is the movement of the ME base, i.e., the top of the tower. For this reason, measurements of the ME tower tilts have been taken in order to quantify the tilts, to determine possible causes of the tilting, and to update the antenna pointing budget. They were conducted under three antenna operating modes: during tracking, slewing, and antenna stowing. The measurements indicate that the ME tower tilts introduce significant pointing errors that exceed the required 32-GHz (Ka-band) pointing precision (estimated as 0.8 mdeg for a 0.1-dB gain loss). Four different sources of tilt were identified and require verification.

  17. Simple model of a cooling tower plume

    Science.gov (United States)

    Jan, Cizek; Jiri, Nozicka

    2016-06-01

    This article discusses the possibilities in the area of modeling of the so called cooling tower plume emergent at operating evaporating cooling systems. As opposed to recent publication, this text focuses on the possibilities of a simplified analytic description of the whole problem where this description shall - in the future - form the base of a calculation algorithms enabling to simulate the efficiency of systems reducing this cooling tower plume. The procedure is based on the application of basic formula for the calculation of the velocity and concentration fields in the area above the cooling tower. These calculation is then used to determine the form and the total volume of the plume. Although this approach does not offer more exact results, it can provide a basic understanding of the impact of individual quantities relating to this problem.

  18. Installing met towers in marine environments

    Energy Technology Data Exchange (ETDEWEB)

    Hanberg, Jackie [DNV Canada (Canada)

    2011-07-01

    Onshore measurements are taken to supplement offshore wind resource measurement campaigns. To maximize the quality of the measured data, the conditions presented by marine environments must be well understood and mitigated. This paper discusses the several factors that need attention prior to installation of the met towers. The towers experience high corrosion from their exposure to moist, salt-laden, marine air. Careful instrumentation and material selection can prevent or decrease corrosion. Stainless or galvanized hardware and coating sensor terminals with petroleum jelly are both helpful. Soil in the marine environment has variable moisture levels and is extremely wet, which makes grounding systems and backfill enhancers necessary. Weather conditions in these environments also tend to be unpredictable; hence, towers should be strong enough to handle typical marine weather. In conclusion, successful marine wind resource assessment campaigns require environmental research, careful planning, and awareness of the specific issues.

  19. On Using Wind Speed Preview to Reduce Wind Turbine Tower Oscillations

    DEFF Research Database (Denmark)

    Kristalny, Maxim; Madjidian, Daria; Knudsen, Torben

    2013-01-01

    We investigate the potential of using previewed wind speed measurements for damping wind turbine fore-aft tower oscillations. Using recent results on continuous-time H 2 preview control, we develop a numerically efficient framework for the feedforward controller synthesis. One of the major benefits...

  20. An analysis of continuous black carbon concentrations in proximity to an airport and major roadways

    Science.gov (United States)

    Dodson, Robin E.; Andres Houseman, E.; Morin, Barbara; Levy, Jonathan I.

    Black carbon (BC), a constituent of particulate matter, is emitted from multiple combustion sources, complicating determination of contributions from individual sources or source categories from monitoring data. In close proximity to an airport, this may include aircraft emissions, other emissions on the airport grounds, and nearby major roadways, and it would be valuable to determine the factors most strongly related to measured BC concentrations. In this study, continuous BC concentrations were measured at five monitoring sites in proximity to a small regional airport in Warwick, Rhode Island from July 2005 to August 2006. Regression was used to model the relative contributions of aircraft and related sources, using real-time flight activity (departures and arrivals) and meteorological data, including mixing height, wind speed and direction. The latter two were included as a nonparametric smooth spatial term using thin-plate splines applied to wind velocity vectors and fit in a linear mixed model framework. Standard errors were computed using a moving-block bootstrap to account for temporal autocorrelation. Results suggest significant positive associations between hourly departures and arrivals at the airport and BC concentrations within the community, with departures having a more substantial impact. Generalized Additive Models for wind speed and direction were consistent with significant contributions from the airport, major highway, and multiple local roads. Additionally, inverse mixing height, temperature, precipitation, and at one location relative humidity, were associated with BC concentrations. Median contribution estimates indicate that aircraft departures and arrivals (and other sources coincident in space and time) contribute to approximately 24-28% of the BC concentrations at the monitoring sites in the community. Our analysis demonstrated that a regression-based approach with detailed meteorological and source characterization can provide insights

  1. Flangeless Connections in Steel Tubular Wind Towers

    OpenAIRE

    Heistermann, Christine; Tran, Anh Tuan; Veljkovic, Milan, ed. lit.; Rebelo, Carlos

    2014-01-01

    Extensive research is conducted on the improvement of renewable energies. One field is the use of wind energy, where the tower construction is one of the main issues. This paper deals with new ideas and ongoing research in this area. To raise the height of steel tubular towers, fatigue as the design limit and constraints due to transportation issues have to be overcome. Changes in the cross-section are considered as one of possible solutions. This work presents an extensive finite element stu...

  2. Towers and KM3NeT

    Science.gov (United States)

    Anassontzis, E. G.; Aggouras, G.; Ball, A. E.; Chinowsky, W.; Fahrun, E.; Grammatikakis, G.; Green, C.; Grieder, P.; Katrivanos, P.; Koske, P.; Markopoulos, E.; Minkowsky, P.; Nygren, D.; Papageorgiou, K.; Przybylski, G.; Resvanis, L. K.; Siotis, I.; Sopher, J.; Tsagli, V.; Zhukov, V. A.

    2006-11-01

    NESTOR Collaboration has deployed one NESTOR module of the deep-sea neutrino telescope at a depth of 4000 m, 14 km off the southwest coast of Greece. The deployment site provides excellent environmental data. Power and data were transferred through a 30 km electro-optical cable to the shore laboratory. In this report, we describe briefly the detector and the well-defined procedure for recovery and deployment of a detector attached to the electro-optical cable and we depict the deployment of several towers and complementary independent strings acoustically connected to the towers.

  3. 76 FR 15028 - Airport Improvement Program (AIP): Interim Policy Regarding Access to Airports From Residential...

    Science.gov (United States)

    2011-03-18

    ... users that are comparable to those charged to airport tenants so that all users bear a fair proportion... excavation or grading of land needed to construct a residential property or construction of a residence... duration of time, not to exceed 20 years. ``Development'' is defined as excavation or grading of...

  4. 77 FR 23598 - Technical Amendment to Cuba Airport List: Addition of Recently Approved Airports

    Science.gov (United States)

    2012-04-20

    ... SECURITY U.S. Customs and Border Protection 19 CFR Part 122 Technical Amendment to Cuba Airport List... from Cuba. DATES: Effective: April 20, 2012. FOR FURTHER INFORMATION CONTACT: Arthur A.E. Pitts, Sr., U... to all aircraft (except public aircraft) entering or departing the United States to or from...

  5. 78 FR 42419 - Airport Improvement Program (AIP): Policy Regarding Access to Airports From Residential Property

    Science.gov (United States)

    2013-07-16

    ... into new agreements. Two commenters shared their positive experiences as residential through-the-fence... self-fueling. The FAA will respond to specific comments submitted by organizations and individuals in... users who could be asked to bear a higher burden of the airport's costs or find the value of...

  6. 77 FR 51948 - Airport Improvement Program (AIP): Policy Regarding Access to Airports From Residential Property...

    Science.gov (United States)

    2012-08-28

    ... previously published interim policy (76 FR 15028; March 18, 2011) to commercial service airports that... 14, 2012. DATES: The comment period for the proposed policy document published July 30, 2012 (77 FR... Proposed Policy in the Federal Register at 77 FR 44515 proposing an FAA policy, based on Federal...

  7. Low-cost Triangular Lattice Towers for Small Wind Turbines

    Science.gov (United States)

    Adhikari, Ram Chandra

    This thesis focuses on the study of low-cost steel and bamboo triangular lattice towers for small wind turbines. The core objective is to determine the material properties of bamboo and assess the feasibility of bamboo towers. Using the experimentally determined buckling resistance, elastic modulus, and Poisson's ratio, a 12 m high triangular lattice tower for a 500W wind turbine has been modeled as a tripod to formulate the analytical solutions for the stresses and tower deflections, which enables design of the tower based on buckling strength of tower legs. The tripod formulation combines the imposed loads, the base distance between the legs and tower height, and cross-sectional dimensions of the tower legs. The tripod model was used as a reference for the initial design of the bamboo tower and extended to finite element analysis. A 12 m high steel lattice tower was also designed for the same turbine to serve as a comparison to the bamboo tower. The primary result of this work indicates that bamboo is a valid structural material. The commercial software package ANSYS APDL was used to carry out the tower analysis, evaluate the validity of the tripod model, and extend the analysis for the tower design. For this purpose, a 12 m high steel lattice tower for a 500 W wind turbine was examined. Comparison of finite element analysis and analytical solution has shown that tripod model can be accurately used in the design of lattice towers. The tower designs were based on the loads and safety requirements of international standard for small wind turbine safety, IEC 61400-2. For connecting the bamboo sections in the lattice tower, a steel-bamboo adhesive joint combined with conventional lashing has been proposed. Also, considering the low durability of bamboo, periodic replacement of tower members has been proposed. The result of this study has established that bamboo could be used to construct cost-effective and lightweight lattice towers for wind turbines of 500 Watt

  8. 49 CFR 37.33 - Airport transportation systems.

    Science.gov (United States)

    2010-10-01

    ... 49 Transportation 1 2010-10-01 2010-10-01 false Airport transportation systems. 37.33 Section 37.33 Transportation Office of the Secretary of Transportation TRANSPORTATION SERVICES FOR INDIVIDUALS WITH DISABILITIES (ADA) Applicability § 37.33 Airport transportation systems. (a)...

  9. 75 FR 62008 - Safety Management System for Certificated Airports

    Science.gov (United States)

    2010-10-07

    ... Research Projects The FAA initiated a number of collaborative efforts studying SMS application at U.S..., training, and reporting. Some airports may realize financial benefits through reduced insurance costs... would help an airport ensure: Individuals are trained on the safety implications of working on...

  10. Creating Authenticity: Banal nationalism in Henri Coand\\[acaron] Airport

    OpenAIRE

    Alexandra Coţofan\\[acaron

    2011-01-01

    Alexandra Coţofan\\[acaron] analyzes the retail spaces of the Henri Coand\\[acaron] International Airport in Bucharest, Romania's largest international airport. She looks at how authenticity is created through the interactions among the company, staff and passengers in the production of ‘banal nationalism’.

  11. Route planning for airport personnel transporting passengers with reduced mobility

    DEFF Research Database (Denmark)

    Reinhardt, Line Blander; Clausen, Tommy; Pisinger, David

    Major airports have an average throughput of more than 100,000 passengers per day, some of which will need special assistance. The largest airports have a daily average throughput of more than 500 passengers with reduced mobility. A significant number of people and busses are assigned to provide ...

  12. Art at the Airport: An Exploration of New Art Worlds

    Science.gov (United States)

    Szekely, Ilona

    2012-01-01

    Many airports have transformed empty waiting spaces into mini malls, children's play areas, and displays of beautiful art, making a long wait a bit more pleasant. For the modern airport, showcasing art has become an important component, with perks including a built-in global audience, as well as the vast spaces of modern architecture. For the art…

  13. Atmospheric Corrosivity at Australian and Overseas Airbases and Airports

    Science.gov (United States)

    2014-07-01

    protective coating systems and corrosion inhibitor treatments deteriorate and become less effective. The CLIMAT environmental corrosion test has...UNCLASSIFIED UNCLASSIFIED Atmospheric Corrosivity at Australian and Overseas Airbases and Airports J C Bitcon Maritime...Division Defence Science and Technology Organisation DSTO-TN-1320 ABSTRACT Atmospheric corrosivity at 25 airbases and airports in Australia

  14. 75 FR 61612 - Airports/Locations: Special Operating Restrictions

    Science.gov (United States)

    2010-10-06

    ... ellen.crum@faa.gov . SUPPLEMENTARY INFORMATION: Background On November 30, 1999 (64 FR 66768), the FAA... Federal Aviation Administration 14 CFR Part 91 Airports/Locations: Special Operating Restrictions AGENCY... amending its airports and locations special operating restrictions regulation to clarify a...

  15. 19 CFR 122.12 - Operation of international airports.

    Science.gov (United States)

    2010-04-01

    ... Administration in 14 CFR part 91. (2) Customs and Border Protection. CBP, based on security or other risk... 19 Customs Duties 1 2010-04-01 2010-04-01 false Operation of international airports. 122.12...; DEPARTMENT OF THE TREASURY AIR COMMERCE REGULATIONS Classes of Airports § 122.12 Operation of...

  16. 78 FR 3311 - Safety Enhancements, Certification of Airports

    Science.gov (United States)

    2013-01-16

    ...) on Safety Enhancements Part 139, Certification of Airports (76 FR 5510). In the NPRM, the FAA... period until May 13, 2011, (76 FR 20570) because we learned that a number of airport operators were not... again reopened the comment period until July 5, 2011, (76 FR 32105) because several industry...

  17. 78 FR 44188 - Notice of Request To Release Airport Property

    Science.gov (United States)

    2013-07-23

    ... Federal Aviation Administration Notice of Request To Release Airport Property AGENCY: Federal Aviation Administration (FAA), DOT. ACTION: Notice of intent to rule on request to release airport property at Sioux..., Kansas City, MO 64106, (816) 329-2644, lynn.martin@faa.gov . The request to release property may...

  18. 78 FR 48926 - Notice of Request To Release Airport Property

    Science.gov (United States)

    2013-08-12

    ... Federal Aviation Administration Notice of Request To Release Airport Property AGENCY: Federal Aviation Administration (FAA), DOT. ACTION: Notice of Intent to Rule on Request to Release Airport Property at the Ottumwa..., MO 64106, (816) 329-2644, lynn.martin@faa.gov . The request to release property may be reviewed,...

  19. 76 FR 78967 - Notice of Request To Release Airport Property

    Science.gov (United States)

    2011-12-20

    ... Federal Aviation Administration Notice of Request To Release Airport Property AGENCY: Federal Aviation Administration (FAA), DOT. ACTION: Notice of Intent To Rule on Request to Release Airport Property at the Liberal... Room 364, Kansas City, MO 64106, (816) 329-2644, lynn.martin@faa.gov . The request to release...

  20. 78 FR 65417 - Notice of Request To Release Airport Property

    Science.gov (United States)

    2013-10-31

    ... Federal Aviation Administration Notice of Request To Release Airport Property AGENCY: Federal Aviation Administration (FAA), DOT. ACTION: Notice of Intent to Rule on Request to Release Airport Property at the Kearney..., (816) 329-2644, lynn.martin@faa.gov . The request to release property may be reviewed, by...

  1. 76 FR 66352 - Notice of Request To Release Airport Property

    Science.gov (United States)

    2011-10-26

    ... Federal Aviation Administration Notice of Request To Release Airport Property AGENCY: Federal Aviation Administration (FAA) DOT. ACTION: Notice of Intent to Rule on Request to Release Airport Property at the Halifax... Park, GA 30337. The request to release property may be reviewed, by appointment, in person at this...

  2. 78 FR 16911 - Notice of Request To Release Airport Property

    Science.gov (United States)

    2013-03-19

    ... Federal Aviation Administration Notice of Request To Release Airport Property AGENCY: Federal Aviation Administration (FAA), DOT. ACTION: Notice of intent to rule on request to release airport property at the Ankeny..., Kansas City, MO 64106, (816) 329-2644, lynn.martin@faa.gov . The request to release property may...

  3. 77 FR 58438 - Notice of Request To Release Airport Property

    Science.gov (United States)

    2012-09-20

    ... Federal Aviation Administration Notice of Request To Release Airport Property AGENCY: Federal Aviation Administration (FAA), DOT. ACTION: Notice of Intent to Rule on Request to Release Airport Property at the Meade..., Kansas City, MO 64106, (816) 329-2644, lynn.martin@faa.gov . The request to release property may...

  4. 78 FR 49790 - Notice of Request To Release Airport Property

    Science.gov (United States)

    2013-08-15

    ... Federal Aviation Administration Notice of Request To Release Airport Property AGENCY: Federal Aviation Administration (FAA), DOT. ACTION: Notice of intent to rule on request to release airport property at the Ottumwa..., MO 64106, (816) 329-2644, lynn.martin@faa.gov . The request to release property may be reviewed,...

  5. 电视塔桅钢结构工程的监理质量安全控制信息读析%Supervision of Quality and Safety Control of TV Tower Masted Steel Projects

    Institute of Scientific and Technical Information of China (English)

    杨红斌

    2013-01-01

    With the expansion of communication supervision business scope, simply mastering the knowledge of communication tower is not enough; it is also necessary to learn about the professional knowledge of television transmitting tower. This paper aims to discuss how to deal with television tower business. First, be clear about the situation. There are many risks and uncertainty in foreign business operation environment. Domestically, the economic structure strategic adjustment is ongoing. How to adapt to the rapidly developing society and unpredictable market under the economic developing mode transferring environment is the key to the company. In order to keep the market share, the company must intensify efforts to expand market and solicit new business, thinking carefully, seizing opportunities and improving its ability. Second, improve service quality. Customer service goal is the starting point and objective of the company's service, and the effect of customer service goal is reflected in the optimization of service knowledge, service experience and service management and customer's satisfaction. Third, due to the specialty of broadcasting and TV industry and the difference between television tower construction and communication tower, this kind of project occupy a small proportion of the construction projects in the same period, so there is specialty and challenge for the existing communications supervision industry.%  根据通信监理业务范围的不断扩大,不光要对通信铁塔知识的掌握,而且对广电行业的电视发射塔的专业知识也要逐步进行了解,如何应对广电的电视塔业务是本文的主要研讨目的。首先、认清形式:国外业务运营环境风险大,存在着不确定性;国内在推进经济结构战略性调整,加快转变经济发展方式的导向下,公司如何适应社会快速发展和市场变化莫测的严峻形势。为了保持公司市场占有率,加大力度持续拓展市

  6. ENVIRONMENTAL CAPACITY AND SUSTAINABLE DEVELOPMENT OF AIRPORTS IN UKRAINE

    Directory of Open Access Journals (Sweden)

    Katheryna Kazhan

    2011-03-01

    Full Text Available Abstract. Forecasting of development of the major airports of Ukraine indicates that further increasingof air traffic and approaching of residential areas close to airports will cause constraints of airportoperational capacity according to ensuring environmental requirements. At present, aircraft noise is themost significant factor among other factors of airport environmental impact. For ensuring sustainabledevelopment of civil airports the model of airport environmental capacity is proposed. The model in longtermconsideration allows determination of optimal (according to reduction of noise levels fleet, choosingthe most profitable aircraft operational regimes in the frames of ICAO Balanced Approach to aircraft noisecontrol. The model is based on entropy optimization method. Using proposed approach needs taking intoaccount additional constraints: operational, environmental (emissions of aircraft engines. Meteorologicaland flight characteristics of aircraft type also should be taken into account.Keywords: aircraft noise, acoustical capacity, environmental capacity, operational restrictions.

  7. A Geometric Fuzzy-Based Approach for Airport Clustering

    Directory of Open Access Journals (Sweden)

    Maria Nadia Postorino

    2014-01-01

    Full Text Available Airport classification is a common need in the air transport field due to several purposes—such as resource allocation, identification of crucial nodes, and real-time identification of substitute nodes—which also depend on the involved actors’ expectations. In this paper a fuzzy-based procedure has been proposed to cluster airports by using a fuzzy geometric point of view according to the concept of unit-hypercube. By representing each airport as a point in the given reference metric space, the geometric distance among airports—which corresponds to a measure of similarity—has in fact an intrinsic fuzzy nature due to the airport specific characteristics. The proposed procedure has been applied to a test case concerning the Italian airport network and the obtained results are in line with expectations.

  8. Optimization of steel monopod offshore-towers under probabilistic constraints

    NARCIS (Netherlands)

    Vrouwenvelder, A.C.W.M.

    2008-01-01

    In this work, economical design implementation of a circular steel monopod-offshore-tower, which is subjected to the extreme wave loading, is presented. The mass of the tower is considered as the objective function. The thickness and radius of the cross-section of the tower are adopted as design var

  9. Tower Power: Producing Fuels from Solar Energy

    Science.gov (United States)

    Antal, M. J., Jr.

    1976-01-01

    This article examines the use of power tower technologies for the production of synthetic fuels. This process overcomes the limitations of other processes by using a solar furnace to drive endothermic fuel producing reactions and the resulting fuels serve as a medium for storing solar energy. (BT)

  10. Gravity Helped Terrorists Destory Twin Towers

    Institute of Scientific and Technical Information of China (English)

    李兆增

    2002-01-01

    Though terrorists triggered (触发) the collapse (倒塌) of the World Trade Center's Twin Towers, much of the energy--calculated by a physicist to have been at least 2 percent that of the atomic bomb dropped on Hiroshima(广岛)--was supplied by nature's most ubiquitous(普通存在的)force: gravity.

  11. Balsa Tower Walls Brave "Big Buster"

    Science.gov (United States)

    Granlund, George

    2008-01-01

    Like many technology teachers, the author, a technology education teacher at Arthur Hill High School in Saginaw, Michigan, tries to stretch his budget by "milking" each student activity for maximum benefit. In the technology department, they use balsa wood towers to teach the basics of structural engineering. To get the most from their materials,…

  12. The Tower of Hanoi and Inductive Logic

    Science.gov (United States)

    Merrotsy, Peter

    2015-01-01

    In the "Australian Curriculum," the concept of mathematical induction is first met in the senior secondary subject Specialist Mathematics. This article details an example, the Tower of Hanoi problem, which provides an enactive introduction to the inductive process before moving to more abstract and cognitively demanding representations.…

  13. Tri-generation at Bordeaux airport; Trigeneration a l`aeroport de Bordeaux

    Energy Technology Data Exchange (ETDEWEB)

    Fourteau, J. [Aeroport de Bordeaux, 33 (France). Direction Technique; Andre, D. [BET Climat (France)

    1996-07-01

    A cogeneration system (Cogenair 2000) for the Bordeaux airport has been studied, for power generation, space heating and air conditioning. The system is composed of a cogeneration plant with natural gas generating plants, heat exchangers and absorption and compression refrigerating plants for winter and summer needs. A centralized control system is included for electric power and thermal comfort management. The organizational, fiscal, legal and financial aspects are also presented

  14. Airport Solar Photovoltaic Concentrator Project. Phase 1 - final report, June 1, 1978-February 28, 1979

    Energy Technology Data Exchange (ETDEWEB)

    1979-12-01

    The system design, analysis, and specification, site preparation, and operation and evaluation plan for a 500 kWe photovoltaic power supply to be located at the Phoenix Sky Harbor International Airport in Phoenix, Arizona, are presented. The solar cell arrays are concentrator silicon solar cells with tracking 70X Cassegrain-type concentrators. The power conditioning system, tracking system, and control systems are described in detal. Environmental impact studies are described. Component specifications and drawings are included. (WHK)

  15. Airport electric vehicle powered by fuel cell

    Science.gov (United States)

    Fontela, Pablo; Soria, Antonio; Mielgo, Javier; Sierra, José Francisco; de Blas, Juan; Gauchia, Lucia; Martínez, Juan M.

    Nowadays, new technologies and breakthroughs in the field of energy efficiency, alternative fuels and added-value electronics are leading to bigger, more sustainable and green thinking applications. Within the Automotive Industry, there is a clear declaration of commitment with the environment and natural resources. The presence of passenger vehicles of hybrid architecture, public transport powered by cleaner fuels, non-aggressive utility vehicles and an encouraging social awareness, are bringing to light a new scenario where conventional and advanced solutions will be in force. This paper presents the evolution of an airport cargo vehicle from battery-based propulsion to a hybrid power unit based on fuel cell, cutting edge batteries and hydrogen as a fuel. Some years back, IBERIA (Major Airline operating in Spain) decided to initiate the replacement of its diesel fleet for battery ones, aiming at a reduction in terms of contamination and noise in the surrounding environment. Unfortunately, due to extreme operating conditions in airports (ambient temperature, intensive use, dirtiness, …), batteries suffered a very severe degradation, which took its toll in terms of autonomy. This reduction in terms of autonomy together with the long battery recharge time made the intensive use of this fleet impractical in everyday demanding conditions.

  16. Flight Schedule Recovery under Uncertain Airport Capacity

    Institute of Scientific and Technical Information of China (English)

    Zhu Bo; Zhu Jinfu

    2016-01-01

    Airlines adj ust their flight schedules to satisfy more stringent airport capacity constraints caused by in-clement weather or other unexpected disruptions.The problem will be more important and complicated if uncertain disruptions occur in hub airports.A two-stage stochastic programming model was established to deal with the real-time flight schedule recovery and passenger re-accommodation problem.The first-stage model represents the flight re-timing and re-fleeting decision in current time period when capacity information is deterministic,while the sec-ond-stage recourse model evaluates the passenger delay given the first-stage solutions when one future scenario is realized.Aiming at the large size of the problem and requirement for quick response,an algorithmic framework combining the sample average approximation and heuristic method was proposed.The computational results indi-cated of that the proposed method could obtain solutions with around 5% optimal gaps,and the computing time was linearly positive to the sample size.

  17. PERFORMANCE ANALYSIS OF MECHANICAL DRAFT COOLING TOWER

    Energy Technology Data Exchange (ETDEWEB)

    Lee, S; Alfred Garrett, A; James02 Bollinger, J; Larry Koffman, L

    2009-02-10

    Industrial processes use mechanical draft cooling towers (MDCT's) to dissipate waste heat by transferring heat from water to air via evaporative cooling, which causes air humidification. The Savannah River Site (SRS) has cross-flow and counter-current MDCT's consisting of four independent compartments called cells. Each cell has its own fan to help maximize heat transfer between ambient air and circulated water. The primary objective of the work is to simulate the cooling tower performance for the counter-current cooling tower and to conduct a parametric study under different fan speeds and ambient air conditions. The Savannah River National Laboratory (SRNL) developed a computational fluid dynamics (CFD) model and performed the benchmarking analysis against the integral measurement results to accomplish the objective. The model uses three-dimensional steady-state momentum, continuity equations, air-vapor species balance equation, and two-equation turbulence as the basic governing equations. It was assumed that vapor phase is always transported by the continuous air phase with no slip velocity. In this case, water droplet component was considered as discrete phase for the interfacial heat and mass transfer via Lagrangian approach. Thus, the air-vapor mixture model with discrete water droplet phase is used for the analysis. A series of parametric calculations was performed to investigate the impact of wind speeds and ambient conditions on the thermal performance of the cooling tower when fans were operating and when they were turned off. The model was also benchmarked against the literature data and the SRS integral test results for key parameters such as air temperature and humidity at the tower exit and water temperature for given ambient conditions. Detailed results will be published here.

  18. Comparison of the efficacy of free residual chlorine and monochloramine against biofilms in model and full scale cooling towers.

    Science.gov (United States)

    Türetgen, Irfan

    2004-04-01

    The presence of microbial cells on surfaces results in the formation of biofilms, which may also give rise to microbiologically influenced corrosion. Biofilms accumulate on all submerged industrial and environmental surfaces. The efficacy of disinfectants is usually evaluated using planktonic cultures, which often leads to an underestimate of the concentration required to control a biofilm. The aim of this study was to investigate the efficacy of monochloramine on biofilms developed in a cooling tower. The disinfectants selected for the study were commercial formulations recommended for controlling microbial growth in cooling towers. A cooling tower and a laboratory model recirculating water system were used as biofilm reactors. Although previous studies have evaluated the efficacy of free chlorine and monochloramine for controlling biofilm growth, there is a lack of published data concerning the use monochloramine in cooling towers. Stainless steel coupons were inserted in each tower basin for a period of 30 d before removal. Monochloramine and free chlorine were tested under identical conditions on mixed biofilms which had been allowed to grow on coupons. Monochloramine was found to be significantly more effective than free chlorine against cooling tower biofilms.

  19. Airport sentinel surveillance and entry quarantine for dengue infections following a fever screening program in Taiwan

    Directory of Open Access Journals (Sweden)

    Kuan Mei-Mei

    2012-08-01

    Full Text Available Abstract Background Dengue has not reached an endemic status in Taiwan; nevertheless, we have implemented a fever screening program at airports for the early detection of febrile passengers with a dengue infection. This study is intended to assess the performance of the airport screening procedures for dengue infection. Methods We analyzed data from the national surveillance system of the Taiwan Centers for Disease Control. We included the imported dengue cases reported by sentinel airports and clinics as well as the domestic cases from 2007–2010. Results Approximately 44.9% (95%CI: 35.73-54.13% of the confirmed imported dengue cases with an apparent symptom (febrile in the viremic stage were detected via the airport fever screening program, with an estimated positive predictive value of 2.36% (95% CI: 0.96- 3.75% and a negative predictive value > 99.99%. Fluctuations in the number of the symptomatic imported dengue cases identified in the airports (X were associated with the total number of imported dengue cases (Y based on a regression analysis of a biweekly surveillance (i.e., n = 104, R2X:Y = 0.61, P 2X(t-1:Y = 0.22, R2X(t-2:Y = 0.31, P  Conclusions A moderate sensitivity of detecting dengue at the airports examined in this study indicated some limitations of the fever screening program for the prevention of importation. The screening program could assist in the rapid triage for self-quarantine of some symptomatic dengue cases that were in the viremic stage at the borders and contribute to active sentinel surveillance; however, the blocking of viral transmission to susceptible populations (neighbors or family from all of the viremic travelers, including those with or without symptoms, is critical to prevent dengue epidemics. Therefore, the reinforcement of mosquito bite prevention and household vector control in dengue-endemic or dengue-competent hotspots during an epidemic season is essential and highly recommended.

  20. 77 FR 59703 - Environmental Impact Statement; Taos Regional Airport, Taos, NM

    Science.gov (United States)

    2012-09-28

    ... Federal Aviation Administration Environmental Impact Statement; Taos Regional Airport, Taos, NM AGENCY...) for the ``Taos Regional Airport, Airport Layout Plan Improvements'' Environmental Impact Statement... requested the FAA to approve revisions to its Airport Layout Plan (ALP) to reflect and allow construction...

  1. 78 FR 15804 - Waiver of Aeronautical Land-Use Assurance: Rolla National Airport (VIH), Rolla, MO

    Science.gov (United States)

    2013-03-12

    ... Federal Aviation Administration Waiver of Aeronautical Land-Use Assurance: Rolla National Airport (VIH... airport property at the Rolla National Airport (VIH) from aeronautical use to non-aeronautical for revenue... Airport (VIH) is proposing the release of one parcel, of 10 acres, more or less from aeronautical to...

  2. 77 FR 19410 - Notice of Schedule Information Submission Deadline for O'Hare International Airport, San...

    Science.gov (United States)

    2012-03-30

    ... Airport, 73 FR 3510 (Jan. 18, 2008) as amended 76 FR 18620 (Apr. 4, 2011); Operating Limitations at Newark Liberty International Airport, 73 FR 29550 (May 21, 2008) as amended 76 FR 18618 (Apr. 4, 2011). The FAA...'s John F. Kennedy International Airport (JFK), and Newark Liberty International Airport (EWR)...

  3. 78 FR 19356 - Notice of Schedule Information Submission Deadline for O'Hare International Airport, San...

    Science.gov (United States)

    2013-03-29

    ... International Airport, 73 FR 3510 (Jan. 18, 2008) as amended 76 FR 18620 (Apr. 4, 2011); Operating Limitations at Newark Liberty International Airport, 73 FR 29550 (May 21, 2008) as amended 76 FR 18618 (Apr. 4...'s John F. Kennedy International Airport (JFK), and Newark Liberty International Airport (EWR)...

  4. An Evaluation of the Importance of Military Associations at Civil Airports

    Science.gov (United States)

    Clark, Patti J.

    2010-01-01

    Today there are over 1,500 public-use airports in the United States. Each of these airports provides a service to the surrounding community, whether in the form of a general aviation or commercial air service facility. An airport is dependent on many facets of the local government infrastructure for support services. Also, the airports have ties…

  5. 48 CFR 3036.570 - Special precautions for work at operating airports.

    Science.gov (United States)

    2010-10-01

    ... work at operating airports. Where any acquisition will require work at an operating airport, insert the clause at (HSAR) 48 CFR 3052.236-70, Special Precautions for Work at Operating Airports, in solicitations... work at operating airports. 3036.570 Section 3036.570 Federal Acquisition Regulations System...

  6. 14 CFR 382.99 - What agreements must carriers have with the airports they serve?

    Science.gov (United States)

    2010-01-01

    ... airports they serve? 382.99 Section 382.99 Aeronautics and Space OFFICE OF THE SECRETARY, DEPARTMENT OF... the airports they serve? (a) As a carrier, you must negotiate in good faith with the airport operator of each U.S. airport described in § 382.95(b) to ensure the provision of lifts for boarding...

  7. 14 CFR 135.395 - Large nontransport category airplanes: Landing limitations: Alternate airports.

    Science.gov (United States)

    2010-01-01

    ...: Landing limitations: Alternate airports. 135.395 Section 135.395 Aeronautics and Space FEDERAL AVIATION... category airplanes: Landing limitations: Alternate airports. No person may select an airport as an alternate airport for a large nontransport category airplane unless that airplane (at the weight...

  8. 77 FR 55896 - Notice of Release Effecting Federal Grant Assurance Obligations Due to Airport Layout Plan...

    Science.gov (United States)

    2012-09-11

    ... Due to Airport Layout Plan Revision at Mather Airport, Sacramento, CA AGENCY: Federal Aviation... Administration (FAA) proposes to rule and invites public comment on the application for an Airport Layout Plan... Force to the County. As a result, the existing Airport Layout Plan will be revised to delete the...

  9. Wind energy conversion. Volume IX. Aerodynamics of wind turbine with tower disturbances

    Energy Technology Data Exchange (ETDEWEB)

    Chung, S.Y.

    1978-09-01

    Lifting line theory which is the counterpart of Prandtl's lifting line theory for rotating wing is employed for the overall performance analysis of a horizontal axis wind turbine rotor operating in a uniform flow. The wake system is modeled by non-rigid wake which includes the radial expansion and the axial retardation of trailing vortices. For the non-uniform flow which are caused by the ground, the tower reflection, or the tower shadow, the unsteady airloads acting on the turbine blade are computed, using lifting line theory and a non-rigid wake model. An equation which gives the wind profile in the tower shadow region is developed. Also, the equations to determine pitch angle control are derived to minimize the flapping moment variations or the thrust variations due to the non-uniform flow over a rotation.

  10. Development of a mechanistically based computer simulation of nitrogen oxide absorption in packed towers

    Energy Technology Data Exchange (ETDEWEB)

    Counce, R.M.

    1981-01-01

    A computer simulation for nitrogen oxide (NO/sub x/) scrubbing in packed towers was developed for use in process design and process control. This simulation implements a mechanistically based mathematical model, which was formulated from (1) an exhaustive literature review; (2) previous NO/sub x/ scrubbing experience with sieve-plate towers; and (3) comparisons of sequential sets of experiments. Nitrogen oxide scrubbing is characterized by simultaneous absorption and desorption phenomena: the model development is based on experiments designed to feature these two phenomena. The model was then successfully tested in experiments designed to put it in jeopardy.

  11. Growth and development of spring towers at Shiqiang, Yunnan Province, China

    Science.gov (United States)

    Jones, Brian; Peng, Xiaotong

    2017-01-01

    Throughout the world, high artesian pressures in hydrothermal areas have led to the growth of tall spring towers that have their vents at their summits. The factors that control their development and formative precipitates are poorly understood because these springs, irrespective of location, are mostly inactive. Spring towers found at Shiqiang (Yunnan Province, China), which are up to 4 m high and 3 m in diameter, are formed largely of calcite and aragonite crystal bushes, euhedral calcite crystals and coated grains with alternating Fe-poor and Fe-rich zones, calcite rafts, and cements formed of various combinations of calcite, aragonite, strontianite, Mg-Si reticulate, needle fiber calcite, calcified and non-calcified microbes, diatoms, and insects. Collectively, the limestones that form the towers can be divided into (1) Group A that are friable, porous and form the cores of the towers and have δ18OSMOW values of + 15.7 to + 19.7‰ (average 17.8‰) and δ13CPDB values of + 5.1 to + 6.9‰ (average 5.9‰), and (2) Group B that are hard and well lithified and found largely around the vents and the tower sides, and have δ18OSMOW values of + 13.0 to + 22.0‰ (average 17.6‰) and δ13CPDB values of + 1.4 to + 3.6‰ (average 2.6‰). The precipitates and the isotopic values indicate that these were thermogene springs. Growth of the Shiqiang spring towers involved (1) Phase IA when precipitation of calcite and aragonite bushes formed the core of the tower and Phase IB when calcite, commonly Fe-rich, was precipitated locally, (2) Phase II that involved the precipitation of white cements, formed of calcite, aragonite, strontianite, and Mg-Si reticulate coatings in cavities amid the Phase I precipitates, and (3) Phase III, which formed probably after spring activity ceased, when needle-fiber calcite was precipitated and the mounds were invaded by microbes (some now calcified), diatoms, and insects. At various times during this complex history, pore waters mediated

  12. Convenient Airports: Point of View of the Passengers

    Science.gov (United States)

    Magri, Adival Aparecido, Jr.; Alves, Claudio Jorge Pinto

    2003-01-01

    The competition among airlines or among airports aiming at to increase the demand for its services has been more and more incited. Knowledge the perception of the users for the offered services means to meet the customer's needs and expectations in order either to keep the customer, and therefore keep a significant advantage over competitors. The passenger of the air transportation wants rapidity, security and convenience. Convenience can be translated by comfort that the passenger wants for the price that he can pay. In this paper had been identified. as a result of a survey achieved in six Brazilian airports during 2002, the best indicators in the passenger's perception. These indicators among any others were listed m the handbook of Airports Council International (ACI). Distinctive perceptions were observed among passengers with different travel motivations. This survey had been carried through in the airports of Brasilia, Porto Alegre, Salvador. Fortaleza, Curitiba and Bel6m. Considering this survey we can identified the most attractive airport among them. This work is a way to help improve quality of service, in particular, m these six airports of the Brazilian network. The results should be published and made available to all the parties concerned (airport authority, airlines and service providers) and should lead to corrective action when the passenger is not satisfied with the service.

  13. A Fast-Time Simulation Tool for Analysis of Airport Arrival Traffic

    Science.gov (United States)

    Erzberger, Heinz; Meyn, Larry A.; Neuman, Frank

    2004-01-01

    The basic objective of arrival sequencing in air traffic control automation is to match traffic demand and airport capacity while minimizing delays. The performance of an automated arrival scheduling system, such as the Traffic Management Advisor developed by NASA for the FAA, can be studied by a fast-time simulation that does not involve running expensive and time-consuming real-time simulations. The fast-time simulation models runway configurations, the characteristics of arrival traffic, deviations from predicted arrival times, as well as the arrival sequencing and scheduling algorithm. This report reviews the development of the fast-time simulation method used originally by NASA in the design of the sequencing and scheduling algorithm for the Traffic Management Advisor. The utility of this method of simulation is demonstrated by examining the effect on delays of altering arrival schedules at a hub airport.

  14. NPP planning based on analysis of ground vibration caused by collapse of large-scale cooling towers

    Energy Technology Data Exchange (ETDEWEB)

    Lin, Feng; Ji, Hongkui [Department of Structural Engineering, Tongji University, No. 1239 Siping Road, Shanghai 200092 (China); Gu, Xianglin, E-mail: gxl@tongji.edu.cn [Department of Structural Engineering, Tongji University, No. 1239 Siping Road, Shanghai 200092 (China); Li, Yi [Department of Structural Engineering, Tongji University, No. 1239 Siping Road, Shanghai 200092 (China); Wang, Mingreng; Lin, Tao [East China Electric Power Design Institute Co., Ltd, No. 409 Wuning Road, Shanghai 200063 (China)

    2015-12-15

    Highlights: • New recommendations for NPP planning were addressed taking into account collapse-induced ground vibration. • Critical factors influencing the collapse-induced ground vibration were investigated. • Comprehensive approach was presented to describe the initiation and propagation of collapse-induced disaster. - Abstract: Ground vibration induced by collapse of large-scale cooling towers can detrimentally influence the safe operation of adjacent nuclear-related facilities. To prevent and mitigate these hazards, new planning methods for nuclear power plants (NPPs) were studied considering the influence of these hazards. First, a “cooling tower-soil” model was developed, verified, and used as a numerical means to investigate ground vibration. Afterwards, five critical factors influencing collapse-induced ground vibration were analyzed in-depth. These influencing factors included the height and weight of the towers, accidental loads, soil properties, overlying soil, and isolation trench. Finally, recommendations relating to the control and mitigation of collapse-induced ground vibration in NPP planning were proposed, which addressed five issues, i.e., appropriate spacing between a cooling tower and the nuclear island, control of collapse modes, sitting of a cooling tower and the nuclear island, application of vibration reduction techniques, and the influence of tower collapse on surroundings.

  15. Response characteristics of a long life type floating offshore airport in waves. 3rd Report. Response due to short waves and an attempt of active inclination control; Chojumyogata futaishiki kaijo kuko no harochu oto tokusei. Tanhachoiki no oto oyobi shisei seigyo no kokoromi

    Energy Technology Data Exchange (ETDEWEB)

    Hirayama, T.; Ma, N.; Nishio, O.; Sato, N. [Yokohama National University, Yokohama (Japan). Faculty of Engineering

    1996-12-31

    Notice was given on response characteristics in a short wavelength range of a large floating structure for an offshore airport consisting of semi-submersible replaceable type units, and influence of unit lacking. An attempt was also made on performing restoration of inclination change during unit lacking and suppression of long-cycle variation in waves by using air pressure control. The result of a numerical calculation based on a three-dimensional singular point method may be summarized as follows: mass force added vertically on columns in short wavelength range differs in the outer edges and the central part; relatively uniform values are shown in the central part; and interactive interference is recognized in wave forces in the vertical direction, but the influence therefrom decreases as the wave length decreases. Calculations on vertical movements and bending moments in waves were performed by using a mode synthesizing method. The calculations used fluid force which was calculated based on the three-dimensional singular point method utilizing symmetry with respect to each condition for a complete model plus unit lacking and unit lacking plus inclination control. As a result of verifying the calculations by using an experiment, relatively good agreement was achieved in either case. A high-frequency vibration experiment made clear the characteristics of elastic response in the short-wave length range. 14 refs., 14 figs.

  16. Airports offer unrealized potential for alternative energy production.

    Science.gov (United States)

    DeVault, Travis L; Belant, Jerrold L; Blackwell, Bradley F; Martin, James A; Schmidt, Jason A; Wes Burger, L; Patterson, James W

    2012-03-01

    Scaling up for alternative energy such as solar, wind, and biofuel raises a number of environmental issues, notably changes in land use and adverse effects on wildlife. Airports offer one of the few land uses where reductions in wildlife abundance and habitat quality are necessary and socially acceptable, due to risk of wildlife collisions with aircraft. There are several uncertainties and limitations to establishing alternative energy production at airports, such as ensuring these facilities do not create wildlife attractants or other hazards. However, with careful planning, locating alternative energy projects at airports could help mitigate many of the challenges currently facing policy makers, developers, and conservationists.

  17. Wind-induced response analysis of a wind turbine tower including the blade-tower coupling effect

    Institute of Scientific and Technical Information of China (English)

    Xiao-bo CHEN; Jing LI; Jian-yun CHEN

    2009-01-01

    To analyze wind-induced response characteristics of a wind turbine tower more accurately, the blade-tower coupling effect was investigated. The mean wind velocity of the rotating blades and tower was simulated according to wind shear effects,and the fluctuating wind velocity time series of the wind turbine were simulated by a harmony superposition method. A dynamic finite element method (FEM) was used to calculate the wind-induced response of the blades and tower. Wind-induced responses of the tower were calculated in two cases (one included the blade-tower coupling effect, and the other only added the mass of blades and the hub at the top of the tower), and then the maximal displacements at the top of the tower of the tow cases were compared with each other. As a result of the influence of the blade-tower coupling effect and the total base shear of the blades, the maximal displacement of the first case increased nearly by 300% compared to the second case. To obtain more precise analysis, the blade-tower coupling effect and the total base shear of the blades should be considered simultaneously in the design of wind turbine towers.

  18. Optical study of solar tower power plants

    Science.gov (United States)

    Eddhibi, F.; Ben Amara, M.; Balghouthi, M.; Guizani, A.

    2015-04-01

    The central receiver technology for electricity generation consists of concentrating solar radiation coming from the solar tracker field into a central receiver surface located on the top of the tower. The heliostat field is constituted of a big number of reflective mirrors; each heliostat tracks the sun individually and reflects the sunlight to a focal point. Therefore, the heliostat should be positioned with high precision in order to minimize optical losses. In the current work, a mathematical model for the analysis of the optical efficiency of solar tower field power plant is proposed. The impact of the different factors which influence the optical efficiency is analyzed. These parameters are mainly, the shading and blocking losses, the cosine effect, the atmospheric attenuation and the spillage losses. A new method for the calculation of blocking and shadowing efficiency is introduced and validated by open literature.

  19. Dynamic analysis of the Milad Tower

    Science.gov (United States)

    Wilhelm, Edwin; Ford, Mitchell; Coelho, Darren; Lawler, Lachlan; Ansourian, Peter; Alonso-Marroquin, Fernando; Tahmasebinia, Faham

    2016-08-01

    This report involves the modelling of the Milad Tower using the finite element analysis program Strand7. A dynamic analysis was performed on the structure in order to understand the deflections and stresses as a result of earthquake and wind loading. In particular, Linear Static as well as Natural Frequency and Spectral Response solvers were used to determine the behaviour of the structure under loading. The findings of the report highlight that the structure was modelled accurately with the outputs representing realistic values. The report suggests that the design of the beams, columns, slabs and all structural members was sufficient enough to support the tower during maximum loading cases. The governing load case was earthquake loading.

  20. Disaster Management for Cooling Tower- Case Study.

    Directory of Open Access Journals (Sweden)

    1Deshmukh Azhar A

    2016-05-01

    Full Text Available Cooling towers are prone to numerous disasters that can arise naturally or through human intervention. The safety of cooling towers becomes utmost importance for the plants to function properly. The study focused on identification of various disasters and the risks associated with them. The disasters can be earthquake, volcanoes, storm, extreme temperature, fire incident, terror attack, hazardous material leakage etc. The impact and vulnerability analysis of these disasters is conducted to find the associated risks properly. Mitigating risks is as important as identifying them. The two most important risks identified are Design Risk and Bacterial Risk. The preparedness to these risks helps in mitigating them. A probabilistic catastrophic risk model has been identified which performs a cost benefit analysis for mitigating the risks

  1. Solar Physics at the Einstein Tower

    CERN Document Server

    Denker, C; Rendtel, J; Arlt, K; Balthasar, H; Diercke, A; Manrique, S J González; Hofmann, A; Kuckein, C; Önel, H; Pavai, V Senthamizh; Staude, J; Verma, M

    2016-01-01

    The solar observatory Einstein Tower (Einsteinturm) at the Telegrafenberg in Potsdam is both a landmark of modern architecture and an important place for solar physics. Originally built for high-resolution spectroscopy and measuring the gravitational redshift, research shifted over the years to understanding the active Sun and its magnetic field. Nowadays, telescope and spectrographs are used for research and development, i.e., testing instruments and in particular polarization optics for advanced instrumentation deployed at major European and international astronomical and solar telescopes. In addition, the Einstein Tower is used for educating and training of the next generation astrophysicists as well as for education and public outreach activities directed at the general public. This article comments on the observatory's unique architecture and the challenges of maintaining and conserving the building. It describes in detail the characteristics of telescope, spectrographs, and imagers; it portrays some of ...

  2. Solar physics at the Einstein Tower

    Science.gov (United States)

    Denker, C.; Heibel, C.; Rendtel, J.; Arlt, K.; Balthasar, Juergen H.; Diercke, A.; González Manrique, S. J.; Hofmann, A.; Kuckein, C.; Önel, H.; Senthamizh Pavai, V.; Staude, J.; Verman, M.

    2016-11-01

    The solar observatory Einstein Tower ({Einsteinturm}) at the Telegrafenberg in Potsdam is both a landmark of modern architecture and an important place for solar physics. Originally built for high-resolution spectroscopy and measuring the gravitational redshift, research shifted over the years to understanding the active Sun and its magnetic field. Nowadays, telescope and spectrographs are used for research and development, i.e., testing instruments and in particular polarization optics for advanced instrumentation deployed at major European and international astronomical and solar telescopes. In addition, the Einstein Tower is used for educating and training of the next generation astrophysicists as well as for education and public outreach activities directed at the general public. This article comments on the observatory's unique architecture and the challenges of maintaining and conserving the building. It describes in detail the characteristics of telescope, spectrographs, and imagers; it portrays some of the research and development activities.

  3. Damping of wind turbine tower vibrations

    DEFF Research Database (Denmark)

    Brodersen, Mark Laier; Pedersen, Mikkel Melters

    Damping of wind turbine vibrations by supplemental dampers is a key ingredient for the continuous use of monopiles as support for offshore wind turbines. The present thesis consists of an extended summary with four parts and appended papers [P1-P4] concerning novel strategies for damping of tower...... dominated vibrations.The first part of the thesis presents the theoretical framework for implementation of supplemental dampers in wind turbines. It is demonstrated that the feasibility of installing dampers at the bottom of the tower is significantly increased when placing passive or semiactive dampers...... that a minimum of three braces in a symmetric circumferential configuration are needed to introduce homogeneous damping in the two lowest vibration modes, independent of the rotor direction. A novel hybrid viscous damper concept is described in the second part. The hybriddamper consists of a viscous dash...

  4. Airports and Airfields, Airport runway/taviway linework as developed during 1996 planimetric and orthoimagery project., Published in 1996, Vilas County Land Information/Mapping.

    Data.gov (United States)

    NSGIC GIS Inventory (aka Ramona) — This Airports and Airfields dataset, was produced all or in part from Orthoimagery information as of 1996. It is described as 'Airport runway/taviway linework as...

  5. Airports and Airfields, Airports in 18 county region in South Georgia, Published in 1999, 1:7200 (1in=600ft) scale, Southern Georgia Regional Commission.

    Data.gov (United States)

    NSGIC GIS Inventory (aka Ramona) — This Airports and Airfields dataset, published at 1:7200 (1in=600ft) scale as of 1999. It is described as 'Airports in 18 county region in South Georgia'. Data by...

  6. Side Stream Filtration for Cooling Towers

    Energy Technology Data Exchange (ETDEWEB)

    None

    2012-10-20

    This technology evaluation assesses side stream filtration options for cooling towers, with an objective to assess key attributes that optimize energy and water savings along with providing information on specific technology and implementation options. This information can be used to assist Federal sites to determine which options may be most appropriate for their applications. This evaluation provides an overview of the characterization of side stream filtration technology, describes typical applications, and details specific types of filtration technology.

  7. Evaluation of TEP Deaeration Tower Rectangular Flange

    Institute of Scientific and Technical Information of China (English)

    WANG; Zhi-hao

    2013-01-01

    The rectangular flange is adapted in the heater of TEP deaeration tower(Fig.1).The rectangular flange is no-round type flange,the evaluation of which is worked on equivalent round flange method.Thecalculation is based on no-round type flange evaluation chapter in HGT 20582—2011 Steel chemical vessel strength calculation code.The loads on the flange are inner pressure,nozzle loads and seismic loads.The nozzle loads is

  8. European dry cooling tower operating experience

    Energy Technology Data Exchange (ETDEWEB)

    DeSteese, J.G.; Simhan, K.

    1976-03-01

    Interviews were held with representatives of major plants and equipment manufacturers to obtain current information on operating experience with dry cooling towers in Europe. The report documents the objectives, background, and organizational details of the study, and presents an itemized account of contacts made to obtain information. Plant selection was based on a merit index involving thermal capacity and length of service. A questionnaire was used to organize operational data, when available, into nine major categories of experience. Information was also solicited concerning the use of codes and standards to ensure the achievement of cooling tower performance. Several plant operators provided finned-tube samples for metallographic analysis. Additionally, information on both operating experience and developing technology was supplied by European technical societies and research establishments. Information obtained from these contacts provides an updated and representative sample of European experience with dry cooling towers, which supplements some of the detailed reviews already available in the literature. In addition, the study presents categorized operating experience with installations which have not been reviewed so extensively, but nevertheless, have significant operational histories when ranked by the merit index. The contacts and interviews reported in the survey occurred between late March and October 1975. The study was motivated by the expressed interest of U.S. utility industry representatives who expect European experience to provide a basis of confidence that dry cooling is a reliable technology, applicable when necessary, to U.S. operating requirements.

  9. Dynamic performance of cable-stayed bridge tower with multi-stage pendulum mass damper under wind excitations--Ⅱ:Experiment

    Institute of Scientific and Technical Information of China (English)

    Guo Anxin; Y L Xu; Li Hui

    2007-01-01

    The possibility of using a multi-stage pendulum mass damper(MSPMD) to control wind-induced vibration of a single column tower of a cable-stayed bridge during construction was studied theoretically in part Ⅰ of this work.In this paper,the performance of the MSPMD for reducing bridge tower vibration is studied experimentally.A MSPMD model and a tower model of the bridge with geometry scaling of 1:100 were designed and manufactured.Calibration of the MSPMD model with different wire lengths is conducted to verify the analytical model of the damper.A series of tests for the uncontrolled freestanding tower,tower with cables,and tower with MSPMD model are then performed under harmonic and white noise excitations.The experimental results show that the responses of the tower model significantly decrease with the installation of the MSPMD model,which demonstrates the effectiveness of the MSPMD to mitigate the vibration of the bridge tower.

  10. The economic impact of South Africa’s international airports

    Directory of Open Access Journals (Sweden)

    Rose Luke

    2010-11-01

    Full Text Available Infrastructure is strongly linked to economic growth and plays a major role in providing greater mobility and choice, leading to an improvement in incomes and welfare. Transport infrastructure such as highways, bridges, ports, airports and railways is critical in achieving economic growth. If the supply of these facilities does not keep up with rising demand, the cost of moving goods will increase, and there will be a downward pressure on profits and growth. Airports play a critical role in generating employment within an economy, creating wealth, contributing to the tax base, stimulating tourism and contributing to world trade. While the latter two are less easily measured, it is possible to determine a base impact that an airport has on an economy by measuring the direct and indirect gross domestic product, employment and taxation impacts. This study quantifies these for the three main international airports in South Africa.

  11. Airports and Airfields, Published in 2007, Churchill County, NV.

    Data.gov (United States)

    NSGIC GIS Inventory (aka Ramona) — This Airports and Airfields dataset as of 2007. Data by this publisher are often provided in State Plane coordinate system; in a Not Sure projection; The extent of...

  12. US Helicopter Expands Service to Newark Liberty International Airport

    Institute of Scientific and Technical Information of China (English)

    2007-01-01

    @@ US Helicopter Corporation ("US Helicopter") (OTC Bulletin Board: USHP) and Continental Airlines (NYSE: CAL)announced a partnership to provide eight-minute shuttle service between Manhattan and Newark Liberty International Airport beginning Dec.18, 2006.

  13. Optimal assignment of incoming flights to baggage carousels at airports

    DEFF Research Database (Denmark)

    Barth, Torben C.

    The problem considered in this report is an assignment problem occurring at airports. This problem concerns the assignment of baggage carousels in baggage claim halls to arriving aircraft (baggage carousel assignment problem). This is a highly dynamic problem since disruptions frequently occur...... during operations. We introduce a basic static model that can be adapted to the layout of different airports. Afterwards we show how a decision support system based on a MIP-model can be designed in a dynamic real world environment. The system supports the decisions of the dispatcher during daily...... operations. Computational results for a real world problem at Frankfurt Airport are presented. At Frankfurt Airport the suggested solution method was successfully implemented and is running now for over half an year. The experiences show that the system increases the quality of the dispatching process...

  14. A World Expo Campaign Launched At Shanghai Airports

    Institute of Scientific and Technical Information of China (English)

    2006-01-01

    <正>The Shanghai Airport Group Company held a meeting on August 22, announcing a decision on renaming its spiritual civilization construction leading group into the Spiritual Civilization Construction Commission. It will adopt an action programme for the years

  15. The airport atmospheric environment: respiratory health at work.

    Science.gov (United States)

    Touri, Léa; Marchetti, Hélène; Sari-Minodier, Irène; Molinari, Nicolas; Chanez, Pascal

    2013-06-01

    Air traffic is increasing, raising concern about local pollution and its adverse health effects on the people living in the vicinity of large airports. However, the highest risk is probably occupational exposure due to proximity. Jet exhaust is one of the main concerns at an airport and may have a health impact, particularly on the respiratory tract. Current studies are neither numerous enough nor strong enough to prove this kind of association. Yet, more and more people work in airports, and occupational exposure to jet exhaust is a fact. The aim of this review was to evaluate the existing knowledge regarding the impact of airport pollution on respiratory health. We conducted systematic literature searches to examine workplace exposures.

  16. Report of Accomplishments under the Airport Improvement Program.

    Science.gov (United States)

    2014-09-26

    maintaining essential air transportation and preventing unjust and . discriminatory practices; - Special emphasis should be given to reliever airports and...exceed 50 percent. Environmental Considerations The Federal Aviation Administration (FAA) considers and weighs environmental factors in evaluating

  17. 78 FR 55330 - Policy Regarding Airport Rates and Charges

    Science.gov (United States)

    2013-09-10

    ... Airport proprietors must retain the ability to respond to local conditions with flexibility and innovation... movements for each of the two preceding years. 4. Planning and Forecasting Information. (a) To the...

  18. Global Map: Airports of the United States - Direct Download

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — This map layer includes Global Map data showing airports in the United States, Puerto Rico and the U.S. Virgin Islands. The data are a modified version of the...

  19. Software Tool for Significantly Increasing Airport Throughput Project

    Data.gov (United States)

    National Aeronautics and Space Administration — NASA's Next Generation Air Transportation System (NextGen) Airportal effort seeks to optimize aircraft surface movements through approaches that could double or...

  20. Airport Configuration Planner with Optimized Weather Forecasts Project

    Data.gov (United States)

    National Aeronautics and Space Administration — The core planning algorithms to support the NGATS concepts will need accurate predictions of airport configuration over planning horizons of six hours or more. Such...

  1. The airport atmospheric environment: respiratory health at work

    Directory of Open Access Journals (Sweden)

    Léa Touri

    2013-06-01

    Full Text Available Air traffic is increasing, raising concern about local pollution and its adverse health effects on the people living in the vicinity of large airports. However, the highest risk is probably occupational exposure due to proximity. Jet exhaust is one of the main concerns at an airport and may have a health impact, particularly on the respiratory tract. Current studies are neither numerous enough nor strong enough to prove this kind of association. Yet, more and more people work in airports, and occupational exposure to jet exhaust is a fact. The aim of this review was to evaluate the existing knowledge regarding the impact of airport pollution on respiratory health. We conducted systematic literature searches to examine workplace exposures.

  2. Microscopic Analysis and Modeling of Airport Surface Sequencing Project

    Data.gov (United States)

    National Aeronautics and Space Administration — The complexity and interdependence of operations on the airport surface motivate the need for a comprehensive and detailed, yet flexible and validated analysis and...

  3. The influence of passenger demographics on airport attribute evaluation

    Directory of Open Access Journals (Sweden)

    Stephen Carstens

    2012-11-01

    Full Text Available It is imperative for airport operators and airlines to have a clear understanding of the factors which influence the passenger’s decision with regard to which airport/airline combination to use in a multi-airport scenario. Interactions between demographic variables, such as gender and purpose of travel, and the choice attributes in the decision-making process exist. The extent to which specific attributes influence the passenger’s decision could be invaluable to service providers (airport operators and airlines in allocating and employing limited resources. The purpose of this article is to investigate the extent of the interactions between passenger demographics and attribute evaluation by taking into account the ordinal nature of the measurement scale.

  4. Allocation of Ground Handling Resources at Copenhagen Airport

    DEFF Research Database (Denmark)

    Justesen, Tor Fog

    operations is imperative for the viability and continued development of both individual airports and the air transportation industry in general. This thesis gives a general introduction to the management of airport operations. It describes the main airport processes and optimization problems...... that these processes give rise to. The primary focus is on ground handling resource allocation problems, it looks in detail at the following problems: the check-in counter allocation problem, the baggage make-up position problem, the tactical stand and gate allocation problem, the operational stand and gate allocation...... to generate appropriate initial variables, enabling the heuristic to efficiently find near-optimal and operationally valid solutions. The work described in this thesis was carried out in the context of an Industrial PhD project at Copenhagen Airport in collaboration with the Technical University of Denmark...

  5. Novel Surveillance Technologies for Airport Ramp Area Operations Project

    Data.gov (United States)

    National Aeronautics and Space Administration — The objective of the current research is to develop the concept, algorithms and software necessary for enabling a novel surveillance system for airports ramp areas....

  6. Analysis of efficiency of the Brazilian international airports

    Directory of Open Access Journals (Sweden)

    Marina Rodriguez Brochado

    2008-07-01

    Brazil. Analysis of correlations was used to select the 0 variable most representative of this system and after that, it was calculated efficiency of the system for classic and inverted the borders by means of model BCC guided for output. Finally, it was possible to identify which improvements are necessary for the inefficient airports, in way to identify which improvements are necessary to operational level to reach the efficiency. Key-words: Data Envelopment Analysis, Efficiency, Airports.

  7. 41 CFR 102-75.400 - Is industrial property located on an airport also considered to be “airport property”?

    Science.gov (United States)

    2010-07-01

    ... 41 Public Contracts and Property Management 3 2010-07-01 2010-07-01 false Is industrial property... Public Airports § 102-75.400 Is industrial property located on an airport also considered to be “airport... is industrial, then the property must be classified as such for disposal without regard to the...

  8. 冷却塔风机电机绕组烧毁及控制系统优化%Cooling tower fan motor winding burn and optimization of control system

    Institute of Scientific and Technical Information of China (English)

    宋辉; 陈梅; 姜楠

    2012-01-01

      Motor winding burn is common fault. Signs before winding burned is not easy to find, and after burned, some direct cause which lead to burn was hidden, analysis difficulty was increased. The motor sealing, winding insulation damage and other aspects were analyzed,At the same time, temperature change of the heat exchanger which did this closed cooling tower system optimization brought for motor timely maintenance and avoiding circulating water temperature.%  绕组烧毁是电机常见故障。绕组烧毁前的迹象不容易发现,而烧毁后一些导致烧毁的直接原因又被掩盖,给事后分析增加了难度。文章就电机密封、绕组绝缘破坏等几方面进行了分析,同时阐述闭式冷却塔系统优化对于电机及时维修和避免循环水温度带来换热器温度变化。

  9. A Framework for Probabilistic Evaluation of Interval Management Tolerance in the Terminal Radar Control Area

    Science.gov (United States)

    Hercencia-Zapana, Heber; Herencia-Zapana, Heber; Hagen, George E.; Neogi, Natasha

    2012-01-01

    Projections of future traffic in the national airspace show that most of the hub airports and their attendant airspace will need to undergo significant redevelopment and redesign in order to accommodate any significant increase in traffic volume. Even though closely spaced parallel approaches increase throughput into a given airport, controller workload in oversubscribed metroplexes is further taxed by these approaches that require stringent monitoring in a saturated environment. The interval management (IM) concept in the TRACON area is designed to shift some of the operational burden from the control tower to the flight deck, placing the flight crew in charge of implementing the required speed changes to maintain a relative spacing interval. The interval management tolerance is a measure of the allowable deviation from the desired spacing interval for the IM aircraft (and its target aircraft). For this complex task, Formal Methods can help to ensure better design and system implementation. In this paper, we propose a probabilistic framework to quantify the uncertainty and performance associated with the major components of the IM tolerance. The analytical basis for this framework may be used to formalize both correctness and probabilistic system safety claims in a modular fashion at the algorithmic level in a way compatible with several Formal Methods tools.

  10. Optimal Airport Surface Traffic Planning Using Mixed-Integer Linear Programming

    Directory of Open Access Journals (Sweden)

    P. C. Roling

    2008-01-01

    Full Text Available We describe an ongoing research effort pertaining to the development of a surface traffic automation system that will help controllers to better coordinate surface traffic movements related to arrival and departure traffic. More specifically, we describe the concept for a taxi-planning support tool that aims to optimize the routing and scheduling of airport surface traffic in such a way as to deconflict the taxi plans while optimizing delay, total taxi-time, or some other airport efficiency metric. Certain input parameters related to resource demand, such as the expected landing times and the expected pushback times, are rather difficult to predict accurately. Due to uncertainty in the input data driving the taxi-planning process, the taxi-planning tool is designed such that it produces solutions that are robust to uncertainty. The taxi-planning concept presented herein, which is based on mixed-integer linear programming, is designed such that it is able to adapt to perturbations in these input conditions, as well as to account for failure in the actual execution of surface trajectories. The capabilities of the tool are illustrated in a simple hypothetical airport.

  11. An Algorithm for Managing Aircraft Movement on an Airport Surface

    Directory of Open Access Journals (Sweden)

    Giuseppe Maresca

    2013-08-01

    Full Text Available The present paper focuses on the development of an algorithm for safely and optimally managing the routing of aircraft on an airport surface in future airport operations. This tool is intended to support air traffic controllers’ decision-making in selecting the paths of all aircraft and the engine startup approval time for departing ones. Optimal routes are sought for minimizing the time both arriving and departing aircraft spend on an airport surface with engines on, with benefits in terms of safety, efficiency and costs. The proposed algorithm first computes a standalone, shortest path solution from runway to apron or vice versa, depending on the aircraft being inbound or outbound, respectively. For taking into account the constraints due to other traffic on an airport surface, this solution is amended by a conflict detection and resolution task that attempts to reduce and possibly nullify the number of conflicts generated in the first phase. An example application on a simple Italian airport exemplifies how the algorithm can be applied to true-world applications. Emphasis is given on how to model an airport surface as a weighted and directed graph with non-negative weights, as required for the input to the algorithm.

  12. 77 FR 16891 - Notice of Intent To Rule on Request To Release Airport Property at Tulsa International Airport...

    Science.gov (United States)

    2012-03-22

    ... Auto Salvage for use as an automobile salvage yard. Any person may inspect the request by appointment..., 2012. Joseph G. Washington, Acting Manager, Airports Division Office. BILLING CODE 4910-13-P...

  13. Airports and Airfields, airport data set, Published in 2006, 1:1200 (1in=100ft) scale, Washoe County.

    Data.gov (United States)

    NSGIC GIS Inventory (aka Ramona) — This Airports and Airfields dataset, published at 1:1200 (1in=100ft) scale, was produced all or in part from Orthoimagery information as of 2006. It is described as...

  14. Airports and Airfields, airport data set attribute, Published in 2006, 1:1200 (1in=100ft) scale, Washoe County.

    Data.gov (United States)

    NSGIC GIS Inventory (aka Ramona) — This Airports and Airfields dataset, published at 1:1200 (1in=100ft) scale, was produced all or in part from Orthoimagery information as of 2006. It is described as...

  15. Airports and Airfields, Polygons of airport runways, Published in 1995, 1:12000 (1in=1000ft) scale, Cochise County.

    Data.gov (United States)

    NSGIC GIS Inventory (aka Ramona) — This Airports and Airfields dataset, published at 1:12000 (1in=1000ft) scale, was produced all or in part from Orthoimagery information as of 1995. It is described...

  16. LIGHT-BEAM SENSORLESS CONTROL OF HELIOSTATS FOR TOWER TYPE SOLAR THERMAL POWER GENERATION APPLICATIONS%塔式太阳能热发电中定日镜无光线位置传感器跟踪控制及误差消除

    Institute of Scientific and Technical Information of China (English)

    马逊; 王平

    2012-01-01

    A method for the control of heliostats for the tower type solar thermal power generation applications without solar position sensor and projection light sensor was presented. Theoretically, sensorless control is not a no-error control, and these errors could be eliminated in control method. Some methods to eliminate the steady-state control error in engineering applications were presented, and the algorithm was verified in Badaling experimental solar thermal power generating plant.%提出一种无需太阳位置传感器和投射光线传感器的定日镜控制技术,用数学手段对镜体的位置进行计算,结合高精度伺服电机实现光斑的正确投射.理论上无传感器控制并不是一种无静差控制,在实际工程应用中应尽量将静态误差在控制环节中用算法消除.提出几种在实际中影响较大的误差消除算法,并在八达岭太阳能热发电实验电站对该方案进行验证.

  17. Technical Evaluation of Side Stream Filtration for Cooling Towers

    Energy Technology Data Exchange (ETDEWEB)

    None

    2012-10-01

    Cooling towers are an integral component of many refrigeration systems, providing comfort or process cooling across a broad range of applications. Cooling towers represent the point in a cooling system where heat is dissipated to the atmosphere through evaporation. Cooling towers are commonly used in industrial applications and in large commercial buildings to release waste heat extracted from a process or building system through evaporation of water.

  18. Structural engineering developments in power plant cooling tower construction. 100 years of natural draught cooling towers - from tower cooler to cooling tower. Bautechnische Entwicklungen im Kraftwerkskuehlturmbau. 100 Jahre Naturzugkuehltuerme - vom Kaminkuehler zum Kuehlkamin

    Energy Technology Data Exchange (ETDEWEB)

    Damjakob, H.; Depe, T.; Vrangos, V. (Balcke-Duerr AG, Ratingen (Germany))

    1992-06-01

    Almost exactly 100 years ago, tower-type structures were first used for the production of artificial ventilation for cooling purposes. The shell of these so-called tower coolers, today known as 'natural draught cooling towers', was, from the outset, the subject of multiple structural engineering develepments in respect of design, material, construction and statistical calculation. These developments have been stimulated especially by the spasmodic increase in dimensions in the application of power plant cooling towers and, more recently, in connection with ecological requirements. (orig.).

  19. Convective Cloud Towers and Precipitation Initiation, Frequency and Intensity

    Science.gov (United States)

    Vant-hull, B.; Mahani, S. E.; Autones, F.; Rabin, R.; Mecikalski, J. R.; Khanbilvardi, R.

    2012-12-01

    : Geosynchronous satellite retrieval of precipitation is desirable because it would provide continuous observation throughout most of the globe in regions where radar data is not available. In the current work the distribution of precipitation rates is examined as a function of cloud tower area and cloud top temperature. A thunderstorm tracking algorithm developed at Meteo-France is used to track cumulus towers that are matched up with radar data at 5 minute 1 km resolution. It is found that roughly half of the precipitation occurs in the cloud mass that surrounds the towers, and when a tower is first detected the precipitation is already in progress 50% of the time. The average density of precipitation per area is greater as the towers become smaller and colder, yet the averaged shape of the precipitation intensity distribution is remarkably constant in all convective situations with cloud tops warmer than 220 K. This suggests that on average all convective precipitation events look the same, unaffected by the higher frequency of occurrence per area inside the convective towers. Only once the cloud tops are colder than 220 K does the precipitation intensity distribution become weighted towards higher instantaneous intensities. Radar precipitation shown in shades of green to blue, lightning in orange; black diamonds are coldest points in each tower. Ratio of number of pixels of given precipitation inside versus outside the convective towers, for various average cloud top temperatures. A flat plot indicates the distribution of rainfall inside and outside the towers has the same shape.

  20. Feasibility Study on High Concentrating Photovoltaic Power Towers

    Science.gov (United States)

    Frohberger, Dirk; Jaus, Joachim; Wiesenfarth, Maike; Schramek, Philipp; Bett, Andreas W.

    2010-10-01

    This paper presents an analysis on the concept of high concentrating PV power towers. A feasibility study is conducted in order to evaluate the future potential of this technology. Objective of the analysis is to provide an improved basis for establishing research and development priorities for the PV power tower concept. Performance assessments and cost calculations for a 1 MW prototype PV tower power are derived. Based on the assumption of a highly homogeneously illuminated receiver, levelized costs of electricity of 0.29 €/kWh have been calculated for a prototype PV tower power.

  1. 78 FR 7852 - Notice of Intent To Rule on Request To Release Airport Property at the Rocky Mountain...

    Science.gov (United States)

    2013-02-04

    ... Rocky Mountain Metropolitan Airport, Broomfield, CO AGENCY: Federal Aviation Administration (FAA), DOT... public comment on the release of land at the Rocky Mountain Metropolitan Airport under the provisions of..., Manager, Federal Aviation Administration, Northwest Mountain Region, Airports Division, Denver...

  2. Relationships between aerosol extinction coefficients derived from airport visual range observations and alternative measures of airborne particle mass

    Energy Technology Data Exchange (ETDEWEB)

    Oezkaynak, H.; Schatz, A.D.; Thurston, G.D.; Isaacs, R.G.; Husar, R.B.

    1985-11-01

    This paper analyzes methods for predicting fine particle (M/sub f/ and inhalable particle (IP) mass concentrations using relative humidity corrected light extinction coefficient (b/sub ext/) estimated from airport visual range (V/sub r) observations. The analyses presented are based on theoretical determinations as well as statistical investigations utilizing EPA's NASN and Inhalable Particle Monitoring Network (IPMN) data bases and routine airport visual range observations in twelve large US cities. Our results indicate that, after controlling for certain limitations of airport visual range data, most of the regression models developed in this paper can be applied satisfactorily to predict M/sub f/ and IP. Furthermore, the findings indicate that a more representative formula than the commonly used meteorological range formula to predict atmospheric b/sub ext/ values in urban areas may be b/sub ext/ = (1.8 +/- 0.04)/V/sub r/. Because of known local or regional influences, however, the authors suggest calibration of any predictive model which utilizes airport visibility data against site-specific aerometric data on particle mass concentrations or scattering coefficient measurements.

  3. Dry cooling tower with water augmentation

    Energy Technology Data Exchange (ETDEWEB)

    Ireland, R.G.; Tramontini, V.N.

    1981-06-23

    An air cooling tower system is disclosed for condensing exhaust steam in power plants, that has water cooling augmentation to maintain the plant cooling capacity during high atmospheric temperature periods. The cooling tower includes a plurality of banks of brazed aluminum plate and fin type heat exchangers arranged in inverted ''v'' shaped sets. These heat exchangers cool ammonia used as the cooling fluid in the primary condenser for the power plant turbine exhaust steam. Each of these heat exchangers has a core consisting of a plurality of parallel aluminum plates spaced apart by fin assemblies that define a plurality of fluid passes. Approximately every other one of these passes has closed sides that open at the ends of the core to headers and define ammonia passes. The passes adjacent the ammonia passes are open at the sides and define air passes that permit the free flow of air transversely through the heat exchanger cores. An additional pass is provided adjacent every fourth one of the ammonia passes and these have closed sides and ends and define the passes for the cooling water. The water passes communicate at the bottom of the core with a water inlet manifold and at the top of the core with a water outlet manifold. The cooling tower system is designed so that at 55 degrees fahrenheit air temperatures or below, the cooling air alone will provide the necessary cooling for the ammonia to satisfy plant requirements. Above 55 degrees fahrenheit air temperature, cooling water from a separate water tank is pumped through the water passes to provide an additional cooling effect to maintain the design cooling capacity.

  4. Particle number concentrations near the Rome-Ciampino city airport

    Science.gov (United States)

    Stafoggia, M.; Cattani, G.; Forastiere, F.; Di Menno di Bucchianico, A.; Gaeta, A.; Ancona, C.

    2016-12-01

    Human exposure to ultrafine particles (UFP) has been postulated to be associated with adverse health effects, and there is interest regarding possible measures to reduce primary emissions. One important source of UFP are airport activities, with aircraft take-offs being the most relevant one. We implemented two measurement campaigns of total particle number concentrations (PNC), a proxy for UFP, near a medium-size airport in central Italy. One-minute PNC averages were collected on June 2011 and January 2012 concurrently with 30-min average meteorological data on temperature and wind speed/direction. Data on minute-specific take-offs and landings were obtained by the airport authorities. We applied statistical regression models to relate PNC data to the presence of aircraft activities while adjusting for time trends and meteorology, and estimated the increases in PNC ±15 min before and after take-offs and landings. We repeated the analyses considering prevalent wind direction and by size of the aircraft. We estimated PNC increases of 5400 particles/cm3/minute during the 15 min before and after take-offs, with a peak of 19,000 particles/cm3/minute within 5 min after take-offs. Corresponding figures for landings were 1300 and 1000 particles, respectively. The highest PNC estimates were obtained when the prevailing wind came from the runway direction, and led to estimated PNC increases of 60,000 particles/cm3/minute within 5 min after take-offs. No main differences were noted from the exhaust of different types of aircrafts. The area surrounding Ciampino airport is densely inhabited, raising concerns about the potential adverse effects of long-term and short-term exposure to airport-borne UFP. A close monitoring of airport activities and emissions is mandatory to reduce the public health impact of the airport on the nearby population.

  5. The Exact Limit of Some Cubic Towers

    DEFF Research Database (Denmark)

    Anbar Meidl, Nurdagül; Beelen, Peter; Nguyen, Nhut

    2016-01-01

    Recently, a new explicit tower of function fields was introduced by Bassa, Beelen, Garcia and Stichtenoth (BBGS). This resulted in currently the best known lower bound for Ihara’s constant in the case of non-prime finite fields. In particular over cubic fields, the tower’s limit is at least as good...... as Zink’s bound; i.e. λ(BBGS/Fq3 ) ≥ 2(q2 - 1)/(q + 2). In this paper, the exact value of λ(BBGS/Fq3 ) is computed. We also settle a question stated by Ihara....

  6. The Solar Tower at Monte Mario: a New Didactic Laboratory for Astronomy

    Science.gov (United States)

    D'Alessio, F.; Faccini, M.; Leoni, R.; Giobbi, G.

    The year 2009 witnessed the restoration of the Solar Tower of Astronomical Observatory of Rome, in the INAF main office of Villa Mellini, Monte Mario. This structure underwent a patient restructuring of optics, mechanics and control equipment. Moreover, some areas have been converted into welcome centre for the visitors, so as to transform a scientific instrument - which was active up to a few years ago - into a didactic structure, mainly suitable for school groups. The Solar Tower of Monte Mario, which has been open to the public since January 2010, allows visitors to directly observe the Sun, as well as the spectrum of its light. The Tower therefore becomes an effective didactic instrument in order to teach and talk about a wide range of scientific topics - from Solar Physics to Sun-Earth interactions, to Stellar Evolution. Here we describe the work done by the DivA group of INAF-OAR for putting back into service the Solar Tower, from the technical and didactic viewpoints. We shall also take stock of the activities organized in the first few months of activity.

  7. ANGULAR DISTORTION ALLOWABLE VALUE AND ASSESS METHOD OF WELD ON COKE TOWER

    Institute of Scientific and Technical Information of China (English)

    2007-01-01

    A graph as the new engineering method for estimate the safety of bulging deformation of coke tower is proposed. Through stresses analysis of circumferential weld of coke tower and comparing the stresses produced by pressure with heat stress of steady state, residual stress, bending stress produced by both itself weight and wind loads, it showed that the stresses produced by pressure on the angle distortion are the main factor of equivalent stress of the combined stress. After comparing four kinds of stress controlling conditions, the relation to stress with depth of angular distortion, grade of curvature of angular distortion and half of region of angular distortion has been inferred. Graph of deformation allowable value of coke tower for different condition by angular distortion and half of region of angular distortion has been plotted. The five steps for its engineering use have been explained. The lighter the grade of curvature is, the larger of bulge allowance, may be, and the bigger of depth of angular distortion may pose too. For the coke tower with a popular structure of Dg 5 400 mm×28 mm, the result by graph is nearly more than the result of two formulas formed by other research, the error is less than 7.0%. But, the graph can be easily applied to different size of angular distortion.

  8. Gunnison County Airport Terminal solar cooperative agreement

    Energy Technology Data Exchange (ETDEWEB)

    Waller, L. H.; Kreider, J. F.

    1981-01-01

    The results of solar system performance studies carried out on the final construction of a passive space heating system for the Gunnison County Airport Terminal are presented. The principal topic discussed is the economic performance of the system with supporting material on thermal performance and system design. The conclusions of this study, using the methods of computer modeling and life-cycle economics are: (1) the final design passive solar heating system with night insulation will provide, on the average, 41% of the annual heating load for the terminal, (2) the passive system will result in a saving of 154 million Btu per year or, equivalently, 45,122 kWh per year, and (3) over a 40-year period the system is expected to save 3.1 million dollars in heating energy costs after the solar system investment has been paid off. Over the first 20-year period the net savings are approximately $100,000. The simple payback period is 13 years.

  9. Deformation control of Beijing international airport line Dong zhimen station crossing the existing turn line%首都国际机场线东直门车站上跨下穿既有折返线变形控制

    Institute of Scientific and Technical Information of China (English)

    吴锋波; 金淮; 马雪梅; 谢孟卿

    2011-01-01

    It is an important high risk engineering project that the new urban raikway transits existing traffic stations or lines. Strict deformation control should be taken for the project of crossing over and under passing of an existing metro tunnel, so as to keep the existing metro tunnel to operate safely. The coalescence of third-party monitoring measurement and synchronous lifting control technology is used for deformation control of the international airport line Dong zhimen station project which crosses the existing No. 13 metro turn line. The monitoring measurement takes close attention to the deformation of the tunnel and track structure and finds some data beyond the value allowed many times. The coalescence of automatic measurement system and synchronous lifting control system has been applied to the displacement control, and the existing turn line keeps operating safely. The results show that the coalescence of third-party monitoring measurement and synchronous lifting control technology could control excessive displacement of the existing line effectively. This method is worth to be used in similar engineering projects.%新建城市轨道交通穿越既有线为重大风险工程,综合上跨和下穿两种形式的穿越更应严格控制既有线的变形,保证既有线的安全运营.通过第三方监测和微量位移技术相结合的方式,对首都机场线东直门车站上跨和下穿既有13号线折返线工程进行变形控制.监测过程中密切关注隧道结构和轨道结构的变形,发现多次数据超值现象,经过自动化监测系统和顶升系统的同步应用,对既有折返线进行了有效的位移调控,既有13号线折返线的安全运营未受影响.结果表明第三方监测和微量位移技术的结合可及时掌控既有线的安全状态,有效调整既有线的过量位移,值得类似工程推广.

  10. Nanchang Hero Bridge Crown Steel Tower Construction Technology%南昌市英雄大桥钢塔冠施工工艺及质量控制

    Institute of Scientific and Technical Information of China (English)

    彭立平

    2014-01-01

    Due to space constraints Tower construction height, crown tower danger and difficulty of construction is very large, this is to highlight the heroic crown Steel Tower Bridge construction technology and construction quality control process.%由于塔柱高空施工空间限制,塔冠施工危险性及难度非常大,本为重点介绍英雄大桥钢塔冠施工工艺及施工过程中的质量控制。

  11. Reviews and Syntheses: optical sampling of the flux tower footprint

    Science.gov (United States)

    Gamon, J. A.

    2015-07-01

    The purpose of this review is to address the reasons and methods for conducting optical remote sensing within the flux tower footprint. Fundamental principles and conclusions gleaned from over 2 decades of proximal remote sensing at flux tower sites are reviewed. The organizing framework used here is the light-use efficiency (LUE) model, both because it is widely used, and because it provides a useful theoretical construct for integrating optical remote sensing with flux measurements. Multiple ways of driving this model, ranging from meteorological measurements to remote sensing, have emerged in recent years, making it a convenient conceptual framework for comparative experimental studies. New interpretations of established optical sampling methods, including the photochemical reflectance index (PRI) and solar-induced chlorophyll fluorescence (SIF), are discussed within the context of the LUE model. Multi-scale analysis across temporal and spatial axes is a central theme because such scaling can provide links between ecophysiological mechanisms detectable at the level of individual organisms and broad patterns emerging at larger scales, enabling evaluation of emergent properties and extrapolation to the flux footprint and beyond. Proper analysis of the sampling scale requires an awareness of sampling context that is often essential to the proper interpretation of optical signals. Additionally, the concept of optical types, vegetation exhibiting contrasting optical behavior in time and space, is explored as a way to frame our understanding of the controls on surface-atmosphere fluxes. Complementary normalized difference vegetation index (NDVI) and PRI patterns across ecosystems are offered as an example of this hypothesis, with the LUE model and light-response curve providing an integrating framework. I conclude that experimental approaches allowing systematic exploration of plant optical behavior in the context of the flux tower network provides a unique way to

  12. [Airports and air quality: a critical synthesis of the literature].

    Science.gov (United States)

    Cattani, Giorgio; Di Menno di Bucchianico, Alessandro; Gaeta, Alessandra; Romani, Daniela; Fontana, Luca; Iavicoli, Ivo

    2014-01-01

    This work reviewed existing literature on airport related activities that could worsen surrounding air quality; its aim is to underline the progress coming from recent-year studies, the knowledge emerging from new approaches, the development of semi-empiric analytical methods as well as the questions still needing to be clarified. To estimate pollution levels, spatial and temporal variability, and the sources relative contributions integrated assessment, using both fixed point measurement and model outputs, are needed. The general picture emerging from the studies was a non-negligible and highly spatially variable (within 2-3 km from the fence line) airport contribution; even if it is often not dominant compared to other concomitant pollution sources. Results were highly airport-specific. Traffic volumes, landscape and meteorology were the key variables that drove the impacts. Results were thus hardly exportable to other contexts. Airport related pollutant sources were found to be characterized by unusual emission patterns (particularly ultrafine particles, black carbon and nitrogen oxides during take-off); high time-resolution measurements allow to depict the rapidly changing take-off effect on air quality that could not be adequately observed otherwise. Few studies used high time resolution data in a successful way as statistical models inputs to estimate the aircraft take-off contribution to the observed average levels. These findings should not be neglected when exposure of people living near airports is to be assessed.

  13. Reality based optimization of steel monopod offshore-towers

    NARCIS (Netherlands)

    Vrouwenvelder, A.C.W.M.

    2008-01-01

    In this work, the implementation of reliability-based optimization (RBO) of a circular steel monopod-offshore-tower with constant and variable diameters (represented by segmentations) and thicknesses is presented. The tower is subjected to the extreme wave loading. For this purpose, the deterministi

  14. Legionella species isolated from cooling towers in Kuala Lumpur.

    Science.gov (United States)

    Ngeow, Y F; Tan, C H; Lim, S Y

    1992-03-01

    Three building complexes in Kuala Lumpur were surveyed for the presence of legionellae in cooling towers. The organisms were grown from 12 out of 46 samples of water collected from 30 towers. L. pneumophila serogroups 1 and 7 were the commonest serogroups isolated. None belonged to the Pontiac subgroup of L. pneumophila serogroup 1.

  15. Wind-induced Vibrations in the European Court Towers

    DEFF Research Database (Denmark)

    Hansen, Jannick B.; Brincker, Rune; Andersen, Ken G.;

    2012-01-01

    Issues regarding occupancy comfort in vibration-sensitive structures are the motivation of this study concerning windinduced vibrations in the European Court Towers in Luxembourg. In one of the two identical towers tuned liquid dampers (TLD) have been installed. Recent studies investigate the cha...

  16. 47 CFR 5.109 - Antenna and tower requirements.

    Science.gov (United States)

    2010-10-01

    ... 47 Telecommunication 1 2010-10-01 2010-10-01 false Antenna and tower requirements. 5.109 Section 5... BROADCAST) Technical Standards and Operating Requirements § 5.109 Antenna and tower requirements. (a) Applicants with fixed stations that use antennas that exceed 6 meters in height above the ground level...

  17. 76 FR 70468 - Extension of Agency Information Collection Activity Under OMB Review: Airport Security

    Science.gov (United States)

    2011-11-14

    ... (SIDA); (4) submission to TSA of identifying information about individuals to whom the airport operator... information on individuals with unescorted access to a SIDA. Airport operators must ensure that...

  18. Twelfth Annual Report of Operations under the Airport and Airway Development Act.

    Science.gov (United States)

    1981-01-01

    Expand apron. Rock Island County Quad City Mount Vernon 08 $ 338,670 Apply porous friction surface Mount Vernon Airport R/W 5-23; rehabilitate runway...lights. Authority Mount Vernon -Outland (COMMUTER) Peoria 09 $ 554,390 Construct and light airport entrance Greater Peoria Airport road. Authority...taxiway lighting. Airport Board Owensboro-Daviess County (COMMUTER) Somerset 07 $ 13,500 Replace portion of lighting on R/W 4-22. Somerset -Pulaski County

  19. Airport Choice in Sao Paulo Metropolitan Area: An Application of the Conditional Logit Model

    Science.gov (United States)

    Moreno, Marcelo Baena; Muller, Carlos

    2003-01-01

    Using the conditional LOGIT model, this paper addresses the airport choice in the Sao Paulo Metropolitan Area. In this region, Guarulhos International Airport (GRU) and Congonhas Airport (CGH) compete for passengers flying to several domestic destinations. The airport choice is believed to be a result of the tradeoff passengers perform considering airport access characteristics, airline level of service characteristics and passenger experience with the analyzed airports. It was found that access time to the airports better explain the airport choice than access distance, whereas direct flight frequencies gives better explanation to the airport choice than the indirect (connections and stops) and total (direct plus indirect) flight frequencies. Out of 15 tested variables, passenger experience with the analyzed airports was the variable that best explained the airport choice in the region. Model specifications considering 1, 2 or 3 variables were tested. The model specification most adjusted to the observed data considered access time, direct flight frequencies in the travel period (morning or afternoon peak) and passenger experience with the analyzed airports. The influence of these variables was therefore analyzed across market segments according to departure airport and flight duration criteria. The choice of GRU (located neighboring Sao Paulo city) is not well explained by the rationality of access time economy and the increase of the supply of direct flight frequencies, while the choice of CGH (located inside Sao Paulo city) is. Access time was found to be more important to passengers flying shorter distances while direct flight frequencies in the travel period were more significant to those flying longer distances. Keywords: Airport choice, Multiple airport region, Conditional LOGIT model, Access time, Flight frequencies, Passenger experience with the analyzed airports, Transportation planning

  20. Cellular Phone Towers, Wireless Towers data layer - not sure of the tower type included, Published in 2008, 1:63360 (1in=1mile) scale, Graham County.

    Data.gov (United States)

    NSGIC GIS Inventory (aka Ramona) — This Cellular Phone Towers dataset, published at 1:63360 (1in=1mile) scale, was produced all or in part from Not Provided information as of 2008. It is described as...