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Добірка наукової літератури з теми "Control Tower Operations"

Автор: Grafiati

Опубліковано: 10 березня 2023

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Статті в журналах з теми "Control Tower Operations"

Wang, Jin Yu, Guang Jie Fu, Dong Xue Lin, and Chao Wang. "Research on Tower Crane Safety Control System Based on GPRS and U Disk Storage." Applied Mechanics and Materials 341-342 (July 2013): 901–5. http://dx.doi.org/10.4028/www.scientific.net/amm.341-342.901.

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Driven by the interests of the construction unit, field workers illegal operations and other reasons, tower crane collapse accidents occur frequently, personal injury or death became common occurrence. According to the nationalGB12602-2010 lifting mechanical overload protection device security technical specifications, security and monitoring equipment must be installed on the tower crane. The GPRS and U disk storage tower crane control system has catered to the national security specified requirements. By the control system, the data can not only be recorded and inquired, well it can also be wireless remote transmitted. Supervisors who are in units can also monitor the construction site online. Meanwhile, the system can control the tower crane operations according to the specific situation of overrun. The system has a good promotional value.

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Wang, Jin Yu, Guang Jie Fu, Dong Xue Lin, and Chao Wang. "Signal Acquisition and Process on Tower Crane Safety Control System." Advanced Materials Research 753-755 (August 2013): 2141–44. http://dx.doi.org/10.4028/www.scientific.net/amr.753-755.2141.

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Tower crane collapse accidents occur frequently, personal injury or death became a common occurrence. According to the nationalGB12602-2011 lifting mechanical overload protection device security technical specifications, security and monitoring equipment must be installed on the tower crane. The GPRS and U disk storage tower crane control system has catered to the national security specified requirements, record and inquires can be realized, at the same time, the control system can achieve data wireless remote. Supervising person that in the units can monitor the construction site online. Meanwhile, the system can control the tower crane operations according to the specific situation of overrun.

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Montonen, Jan-Henri, Niko Nevaranta, Markku Niemelä, and Tuomo Lindh. "Comparison of Extrainsensitive Input Shaping and Swing-Angle-Estimation-Based Slew Control Approaches for a Tower Crane." Applied Sciences 12, no. 12 (June 10, 2022): 5945. http://dx.doi.org/10.3390/app12125945.

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Tower cranes are needed to move heavy objects safely around construction sites. In tower cranes, payload oscillations are a typical problem that can cause safety issues, especially if the crane is not operated by an experienced user. Depending on the system, there are different causes for oscillations, e.g., inertial forces from the crane movement or external forces, such as weather conditions. Hence, the selected control law for input tracking plays an important role to limit the oscillatory motion and to help the crane operator to prevent unwanted operations. In this paper, we study the slew control of a tower crane application from the viewpoint of reducing payload oscillations. Two different approaches are studied: open-loop control based on extrainsensitive input shaping and closed-loop swing angle control, based on the estimation of the hoist cable angle. The proposed control approaches are validated by running the developed control program against a multibody mechanics simulator containing a model of a Liebherr tower crane. The studied control laws are also evaluated using an experimental setup, which consists of a two-axis manipulator, inverters, and a programmable logic controller in which the studied control methods are implemented. The results from the multibody dynamics simulations and from the experimental setup are presented and evaluated from the viewpoint of crane operation.

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Friedrich, Maik, and Christoph Möhlenbrink. "How to Evaluate Remote Tower Metrics in Connection With Weather Observations." Aviation Psychology and Applied Human Factors 8, no. 2 (September 2018): 100–111. http://dx.doi.org/10.1027/2192-0923/a000142.

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Abstract. Owing to the different approaches for remote tower operation, a standardized set of indicators is needed to evaluate the technical implementations at a task performance level. One of the most influential factors for air traffic control is weather. This article describes the influence of weather metrics on remote tower operations and how to validate them against each other. Weather metrics are essential to the evaluation of different remote controller working positions. Therefore, weather metrics were identified as part of a validation at the Erfurt-Weimar Airport. Air traffic control officers observed weather events at the tower control working position and the remote control working position. The eight participating air traffic control officers answered time-synchronized questionnaires at both workplaces. The questionnaires addressed operationally relevant weather events in the aerodrome. The validation experiment targeted the air traffic control officer’s ability to categorize and judge the same weather event at different workplaces. The results show the potential of standardized indicators for the evaluation of performance and the importance of weather metrics in relation to other evaluation metrics.

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Harry-Ngei, N., I. Ubong, and P. N. Ede. "Review of the Scrubber as a Tool for the Control of flue Gas Emissions in a Combustion System." European Journal of Engineering and Technology Research 4, no. 11 (November 1, 2019): 1–4. http://dx.doi.org/10.24018/ejeng.2019.4.11.1561.

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This paper focuses on the description, function and working principles of the wet gas scrubber required to control air pollution emissions from a combustion system of a boiler. Important points to note in the selection and operation of the scrubber as well as the different types of scrubbers commonly deployed in the industries to cut down on emissions were addressed. A comprehensive reviews of the removal mechanisms and schemes of the scrubber were reported for various research on the subject. The packed tower scrubber, however, was recommended because of varying advantages and ease of operations.

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Harry-Ngei, N., I. Ubong, and P. N. Ede. "A Review of the Scrubber as a Tool for the Control of flue Gas Emissions in a Combustion System." European Journal of Engineering Research and Science 4, no. 11 (November 1, 2019): 1–4. http://dx.doi.org/10.24018/ejers.2019.4.11.1561.

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Al Hattab, Malak, Emile Zankoul, Mohammad Barakat, and Farook Hamzeh. "Crane overlap and operational flexibility: balancing utilization, duration, and safety." Construction Innovation 18, no. 1 (January 2, 2018): 43–63. http://dx.doi.org/10.1108/ci-11-2016-0062.

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Purpose With tower cranes being the site hubs, thoroughly planning and managing their operations can result in better construction performance. As urban spaces become more constricted, overlapping working radii of tower cranes becomes inevitable. While project planners are concerned with safety hazards, research has not comprehensively addressed workload distribution and synchronization of overlapping cranes. Therefore, this study aims at exploring the impact of overlapping cranes, used on high-rise buildings, on operational flexibility which is the balance between schedule duration, crane utilization and safety. Design/methodology/approach A simulation model was developed and applied on a real project to analyze and compare the impacts of different overlap sizes. Seven scenarios of different overlap sizes, i.e. different number of tasks falling in the overlap space, were executed in the model; their results were plotted and analyzed. Findings The outcomes result from several compounded factors such as the experience of planners and crane operators, the sequencing of critical versus non-critical activities and the overall effort and care taken when planning operations of overlapping cranes. Increasing overlap size can be beneficial or unfavorable depending on how properly planners allocate overlapping cranes to workload demand, keeping in mind that there are certain trade-offs while achieving operational flexibility. Originality/value While project planners are concerned with safety hazards associated with crane overlaps, research has not been comprehensively nor proactively addressing the workload distribution and synchronization of overlapping crane processes. This study contributes to science by addressing the need to harness the flexibility in using overlapping tower cranes while minimizing the resulting interruptions and safety risks. This study sheds light on the potential benefits of allowing cranes to overlap while considering their collision free operations. Operational flexibility is seen as the balance between achieving shorter schedule durations and higher crane utilizations while maintaining collision free motion paths.

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Mott, John H., Margaret L. McNamara, and Darcy M. Bullock. "Accuracy Assessment of Aircraft Transponder–Based Devices for Measuring Airport Operations." Transportation Research Record: Journal of the Transportation Research Board 2626, no. 1 (January 2017): 9–17. http://dx.doi.org/10.3141/2626-02.

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Accurate counts of aircraft operations at unmonitored or partially monitored general aviation airports are difficult to achieve, but they are important because of their effect on the allocation of federal and state airport improvement funds. Impediments to correctly counting aircraft operations include inaccuracies related to the acoustic counters that are commonly used to collect data and errors in the statistical procedures that extrapolate the sample data into meaningful counts. In response to these impediments, the authors developed a measurement technique that uses data from aircraft transponders to determine the occurrence of aircraft operations at these airports. To validate the accuracy of this technique, operations counts calculated from its use at a general aviation airport in the state of Indiana were compared with those obtained from the FAA’s Air Traffic Activity Data System database, which contains official operations data reported by airports with towers. This comparison, which was conducted using data for April 2016, indicated that the new technology provided values within 5% of the 7,837 total operations reported by tower operators. The transponder signal–counting technology thus appears to be an effective and inexpensive means of establishing accurate operations counts not only at these airports but potentially at the more than 2,800 of the 3,331 airports in the National Plan of Integrated Airport Systems that lack associated air traffic control towers.

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Ameduri, Salvatore, Monica Ciminello, Antonio Concilio, Ignazio Dimino, Bernardino Galasso, Mariano Guida, Marco Fabio Miceli, et al. "Whirl Tower Demonstration of an SMA Blade Twist System." Actuators 11, no. 6 (May 25, 2022): 141. http://dx.doi.org/10.3390/act11060141.

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This paper focuses on the development and demonstration of a novel blade morphing system within a whirl tower facility. The scope is to investigate the behavior of the proposed architecture under representative loads, demonstrating its capability to alter the blade original shape in operation under centrifugal, aerodynamic, and internal forces. The morphing concept was developed inside the European project “Shape Adaptive Blades for Rotorcraft Efficiency”, SABRE, and consists of a shape memory alloy system able to change the original twist law and, in this way, enhance rotor performance at certain specific regimes, such as hover and vertical flight. These phases, indeed, are generally penalized with respect to other more extended flight regimes (cruise). The work starts with an overview of the research in the field of morphing, with specific reference to the researches envisaging rotary wing demonstrations. Then, an overview of the morphing twist concept is provided, with particular attention paid to those features particularly suited for the whirl tower representative test environment. The laboratory characterization and commissioning operations are illustrated. Then, the task of the installation of the prototype on the whirl tower facility is described together with the testing modality adopted. Finally, the results of the test campaign are illustrated and critically discussed, providing the reader with insights and possible future steps to be taken in further research. The impact on the morphing capability of the following different parameters was investigated: the number of the prototype segments switched on, the speed and thus the centrifugal actions, and the angles of attack. The stiffening effect due to centrifugal actions was quantified through the measurement of the actual twist and the internal deformation. The link between speed, angle of attack at root, and twist and flap angles was also tracked, building a database useful for the comprehension of the phenomenon, and for the assessment of numerical predictive models. The achieved results highlighted the capability of the system to produce a twist angle matching the target of 8° per blade radius; this figure is related to a potential power saving of 10% in hover and vertical flight and an improvement of about 1% on the over-all efficiency of the rotorcraft.

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Jin, Lianghai, Han Liu, Xiazhong Zheng, and Shu Chen. "Exploring the Impact of Wind Loads on Tower Crane Operation." Mathematical Problems in Engineering 2020 (July 31, 2020): 1–11. http://dx.doi.org/10.1155/2020/2807438.

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The construction industry continues to be one of the industries with the highest accident rate. Tower cranes have always been the central component of many construction operations. With recent advancements in tower cranes, more efforts have been made for their safe operation. The impact of natural environmental factors on the operation of tower cranes cannot be ignored, especially the impact of the wind load, which can be found in construction regulations worldwide. Therefore, a large number of recent studies have focused on exploring different approaches to improving the impact of loads, such as improved feedback controllers and collocated sensors. However, there are few studies on the impact of the flexible cable pendulum system under wind load. To quantify the impact in this paper, first, the swing model of the hanging and the model of sling fluctuation are proposed as the base. Second, the flexible cable pendulum model is designed for the impact of tower cranes under wind load. By field experiments, the applicability of the model in practical use is analyzed. A case of the Crane Beach Hydropower Station is investigated as a demonstration. With MATLAB programming, the variation in the hanging impulse with wind speed is shown, indicating that the maximum wind speed should be 12 m/s if the factors that people can control are considered. When considering the factors that can be harmful to humans, the maximum wind speed is 17 m/s. With the proposed model, the impacts of wind load on tower crane operation can be quantified without actual deployment, offering a more straightforward quantitative tool for safe regulations and engineering management.

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Більше джерел

Дисертації з теми "Control Tower Operations"

Ellakany, Farid. "Enhancing the Thermo-Economic Performance of a Direct Steam Generation Solar Tower Power Plant through the Implementation of Steam Flow Control Strategies for Flexible Operation." Thesis, KTH, Kraft- och värmeteknologi, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-150112.

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Above 90% of the current installed concentrating solar power plants are based on conventional steam-turbine cycles. The operation of steam turbines in these plants is distinctive when compared to traditional base-load power plants. The reason goes back to the intermittent nature of solar power which, in the absence of thermal energy storage or a back-up combustion boiler, forces plant operators to shut down the turbines during night time or at times of low solar radiation. Furthermore, such intermittency often leads to undesirable off-design turbine operating circumstances, either by load variations or changes on live-steam conditions.The present study examines the influence of implementing two operating strategies dealing with steam flow control as a function of incoming solar power for enhancing the thermo-economic performance of a direct steam generation solar tower power plant. The first one consists of a simultaneous high pressure turbine stage- and feed-water preheater bypass. This strategy is used during periods in which the solar radiation is higher than nominal. On these occasions, the plant is capable of generating a larger flow of steam, which allows for an increase in the power production when inserting the additional steam in the turbine bypass. On the other hand, the second operating strategy consists of using an additional feed-water preheater when the power from the field is lower than nominal. In this way, the feed water can reach a higher temperature prior entering the boiler, which is not only beneficial during times of cloud-passages, but also during the start-up process.A dynamic model of a direct steam generation solar tower power plant has been developed following design and operation specifications of an existing reference plant. The two proposed strategies were implemented to the reference model, then a whole year worth simulation was performed for both the reference and the modified models. Lastly, the thermodynamic and economic performance of both systems was measured for the purpose of comparison, by means of using KTH in-house tool DYESOPT. Results show that the implementation of the proposed strategies can enhance the economic viability of the systems by yielding a reduction of 8.7% on the levelized cost of electricity, mainly due to allowing achieving a 12% increase in the net electricity production.

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Rosa, De Piano. "Concepts of multimodal interactions to support Human Performance in Remote Tower Operations." Doctoral thesis, 2018. http://hdl.handle.net/2158/1203521.

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This thesis deals with the development of exploratory concepts of multimodal interactions able to support the Human Performance (HP) of Tower (TWR) Air Traffic Controllers (ATCOs) from a remote tower, during the traffic management on the area under their responsibility. Nowadays the TWR Controllers’ job consists in the management of the aircraft and vehicles movements on the runways and taxiways of an airport and they perform their tasks with the Out-The-Window (OTW) view, which means that they look at the vehicles without using any screens, but directly looking outside of the tower building windows, especially in small and medium airports. In recent years, a new operational concept emerged in aviation: the Remote Tower Operations (RTOs). The motivation of the growth of this new concept is the current European situation of small and medium density airports that often have to face the difficulties and the high costs for the provision of a safe and efficient Air Traffic Service (ATS). The idea behind is that in the new remote working environment, the Tower ATCO will no longer perform his/her tasks from a local aerodrome but from a distant position. According to the European guidelines that are being developed to define the technical and operational requirements of the Remote Tower system, it is supposed that the TWR ATCOs will monitor the traffic mainly through the implementation of high definition cameras, including also radar screens and radio transmission, instead of the OTW. In addition to the visual information, the aerodrome outdoor sound is also taken into consideration for the development of the Control Working Position (CWP) support tools, without any mention to data collected through other sensory modalities. The PhD work has been carried out in the framework of a European project called MOTO (The embodied reMOte TOwer) which, considering the above-mentioned context and the theories of multisensory interaction and embodied cognition, explores the possibility to improve human performance in RTOs. The multisensory concept and the embodied cognition, which study the feeling and the modalities humans use to interact with the environment, have been considered as the theoretical context to achieve a full understanding on how controllers use all of their senses during every day operations, in order to improve the situation awareness and to decrease the workload. This approach offers the advantage of analysing complex human behaviours during natural interactions in real-world environments and in enriched simulations of the real world.

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Книги з теми "Control Tower Operations"

Michigan. Intercity Transportation Planning Division. Passenger Transportation Planning Section. and Michigan State Transportation Commission, eds. Michigan control tower airport operations, 1980-1984. [Lansing, Mich.]: State Transportation Commission, 1985.

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FEDERAL AVIATION ADMINISTRATION. Recommended standard traffic patterns and practices for aeronautical operations at airports without operating control towers. [Washington, D.C.] (800 Independence Ave., S.W., Washington 20591): U.S. Dept. of Transportation, Federal Aviation Administration, 1993.

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Rajagopal, Sanjeevi. Operational and Environmental Consequences of Large Industrial Cooling Water Systems. Boston, MA: Springer US, 2012.

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Inc, Game Counselor. Game Counselor's Answer Book for Nintendo Players. Redmond, USA: Microsoft Pr, 1991.

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Inc, Game Counsellor, ed. The Game Counsellor's answer book for Nintendo Game players: Hundredsof questions -and answers - about more than 250 popular Nintendo Games. Redmond, Washington: Microsoft Press, 1991.

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Venugopalan, Vayalam P., Sanjeevi Rajagopal, and Henk A. Jenner. Operational and Environmental Consequences of Large Industrial Cooling Water Systems. Springer, 2014.

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Electronic warfare: Towed decoys could improve survivability of current Navy aircraft : report to congressional committees. Washington, D.C. (P.O. Box 37050, Washington, D.C. 20013): The Office, 1997.

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N-Force Presents: Tips Force. Shropshire, UK: Europress Impact Ltd., 1992.

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Частини книг з теми "Control Tower Operations"

van Schaik, F. J., J. J. M. Roessingh, G. Lindqvist, and K. Fält. "Detection and Recognition for Remote Tower Operations." In Virtual and Remote Control Tower, 53–65. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-28719-5_3.

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Miller, Mark, Sam Holley, Bettina Mrusek, and Linda Weiland. "Assessing Cognitive Processing and Human Factors Challenges in NextGen Air Traffic Control Tower Team Operations." In Advances in Intelligent Systems and Computing, 289–95. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-51369-6_39.

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Padoy, Nicolas. "Toward an Operating Room Control Tower?" In Healthcare and Artificial Intelligence, 115–19. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-32161-1_16.

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Papenfuss, Anne, and Christoph Möhlenbrink. "Assessing Operational Validity of Remote Tower Control in High-Fidelity Simulation." In Virtual and Remote Control Tower, 87–113. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-28719-5_5.

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Friedrich, Maik. "Which Metrics Provide the Insight Needed? A Selection of Remote Tower Evaluation Metrics to Support a Remote Tower Operation Concept Validation." In Virtual and Remote Control Tower, 221–40. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-28719-5_10.

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Friedrich, Maik. "Which Metrics Provide the Insight Needed? A Selection of Remote Tower Evaluation Metrics to Support a Remote Tower Operation Concept Validation." In Virtual and Remote Control Tower, 197–216. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-030-93650-1_9.

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Block, Joachim, and Stefan Pickl. "OR Control Towers: A Concept for Optimizing the Performance of Complex Adaptive Operating Systems." In Operations Research Proceedings, 491–97. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-18500-8_61.

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Malmstedt, Andréas, and Jenny Bäckstrand. "How to Predict Disruptions in the Inbound Supply Chain in a Volatile Environment." In Advances in Transdisciplinary Engineering. IOS Press, 2022. http://dx.doi.org/10.3233/atde220182.

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The most common solutions to protect the supply chains for disruptions are increasing inventory, adding capacity, and using multiple suppliers. While these approaches in general prove to solve the disruption problem, they come with a negative effect on cost per product and cost of capital. In a highly volatile demand environment with fast pace changing technology, increasing inventory can constitute a big risk for obsolesce, hence additional measures are needed to create a competitive business advantage with such a supply chain. Furthermore, when competing about the same sources, as in the case of semiconductors, Operations Executives need to be able to respond fast when supply issues occur, in order to minimize the potential impact from a disruption. The ability to react and response to a disruption is enhanced with Supply chain risk tools utilizing the most recent technologies, such as Control Tower solutions enabling End-to End monitoring and transparency. However, even with the help of such technology, the decision maker will still be reactive and can merely respond to occurrences. To reach the next level of responsiveness, additional layer of intelligence is needed in the supply chain solution. From the available literature about Supply Chain Resilience, and similar advanced supply chain solutions, we can conclude that the main focus of research has so far been on the demand side, i.e., how to enhance forecast management. There are thus few practical and academic contributions on how to manage the supply side or more precise on how to manage the Inbound Supply Chain in a volatile business environment. The purpose of this paper is to investigate what factors that are crucial to regard when creating a proactive and responsive Inbound Supply Chain.

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Тези доповідей конференцій з теми "Control Tower Operations"

Reynolds, Tom, Richard Jordan, Mariya Ishutkina, and James Kuchar. "Benefits Assessment Methodology for an Air Traffic Control Tower Advanced Automation System." In 10th AIAA Aviation Technology, Integration, and Operations (ATIO) Conference. Reston, Virigina: American Institute of Aeronautics and Astronautics, 2010. http://dx.doi.org/10.2514/6.2010-9053.

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Alias, Cyril, Cagdas Ozgur, Mandar Jawale, and Bernd Noche. "Analyzing the potential of Future-Internet-based logistics control tower solutions in warehouses." In 2014 IEEE International Conference on Service Operations and Logistics, and Informatics (SOLI). IEEE, 2014. http://dx.doi.org/10.1109/soli.2014.6960767.

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Silva, Alexandre, Eduardo Ferreira, Normand Laforge, and Sergio Carvalho. "The use of surveillance data in augmented reality system to assist control tower operations." In 2015 3rd Experiment International Conference (exp.at'15). IEEE, 2015. http://dx.doi.org/10.1109/expat.2015.7463261.

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Srivastava, Yogesh Chandra, Abhishek Srivastava, Consuelo Granata, and Tanvi Garg. "Digital Control Tower – Instantaneous Visibility, Granularity and Decision Support for an LNG Mega Project." In ADIPEC. SPE, 2022. http://dx.doi.org/10.2118/211056-ms.

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Abstract Objectives/Scope Cloud based end to end digital project management platform with digital control tower, as fundamental technologies of the fourth industrial revolution, have enormous potential to improve real time visibility, productivity, collaboration, data sharing, efficiency, predictability, decision power and sustainability in the construction industry. Throughout the lifecycle of capital / mega projects, the engineering, construction, operations, and maintenance stakeholders face numerous issues, including the lack of trust and visibility, inefficiencies, and the fragmentation of the information value chain into fragile data silos. Digital control tower aimed to narrow down the time, budget and quality & safety challenges of a capital project by having overall / end to end control of project from initiation phase to handover and operations phase of the project. Methods, Procedures, Process Digital control tower provides systematic, 360-degree view of project details along with real-time analytics spanning from design engineering, pre-construction planning, onsite execution, action tracker, construction services, equipment's, quality, budget and safety (leading and lagging indicators). Stakeholders involved throughout the project lifecycle (i.e.: owner, engineering team, pre-construction and planning team, construction management and site team), enables instantaneous connectivity from the top floor to the shop floor for seamless communication by reducing waste time. Digital control tower also enables bird's eye view for real time project performance monitoring and progress, it also enables week wise look ahead task for better monitoring and control, also narrows down the issues or concerns to an activity, area or person. The control tower can create the customizable necessary discipline/function dashboards available to all relevant roles and stakeholders without limitation. Results, Observations, Conclusions Digital Control Tower leverages Artificial intelligence, Machine learning and Blockchain technologies to seamlessly capture, maintain and process fragmented data set into intelligent predictive analytics which helps the project stakeholders to take right decision on right time, so as to avoid any kind of delays in project. Novel/Additive Information Digital Control Tower is not a standard dashboard, it's an integrated digital ecosystem where stakeholders can drive projects with real time data for decision making.

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Joshi, Mehul, Padmanabhan Ramabhaskaran, Ankit Shah, Sandeep Soni, Rohan Gupte, and Jitendra Mitra. "Remote Automated Well Test Operation on Un-Manned Well-Head Tower to Achieve Operational Safety and Efficiency." In ADIPEC. SPE, 2022. http://dx.doi.org/10.2118/211016-ms.

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Abstract The unmanned operation in an offshore operating asset with large number of wells inherits a variety of operational and safety challenges, which demands innovation and emerging technology adoption. This paper demonstrates one of such operational activities related to well testing, where the value realized from mitigation of challenges brings significant process improvement in terms of safety and efficiency. Moreover, this paper also highlights the importance of planning and implementing such an initiative to overcome the process optimization challenges and associated change management risks. The current process of well test operation requires the process engineer to divert the well strings by operating the valves manually to perform the test. The associated challenges related to the execution of such an operation were captured while devising the automated well test approach for remote WHT. This solution was formulated on a fallback strategy to retain the existing process in case of remote access failure. Using the SCADA system at the control location, the operator can execute the remote operation using a simplified process just by selecting a well and initiating the associated test operation. This automated process enabled users to plan, execute, and control the well test operation seamlessly, realizing operational KPIs safely and efficiently. The manual interventions and related mistakes were minimized by using this automated approach. The interlock feature of the approach brought automation and operational efficiency to the process due to the system performing conditional checks on different associated equipment in this process. This significantly improved the manhour efforts and interlinked human errors, which could otherwise cause a significant loss of operational time and cost. The seamless integration with corporate data sources assured information flow from field to head offices fast and accurately, which adds to the process efficiency by avoiding human errors related to manual data handling. The integration aspect of this solution was unique as it was based on constant feedback and rigorous testing with end-users, along with robust architecture to incorporate various IT components and OT cybersecurity concerns. The novelty of this solution was based on an approach that caters to the complexity, safety and process efficiency concerns of the current process when observed from the operational challenges associated with a giant producing field in a remote location. This brings the field in control and enables the asset operation team to plan the operations in a proactive manner, delivering quality outputs while achieving the critical operational KPIs.

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Panjeshahi, Mohammad Hassan, Mona Gharaie, and Lena Ahmadi. "Improving the Performance of Cooling Water Systems Using Exergy Analysis: A Novel Approach." In ASME 2009 International Mechanical Engineering Congress and Exposition. ASMEDC, 2009. http://dx.doi.org/10.1115/imece2009-12646.

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Circulating cooling water systems almost serve all the operations of industrial plants where there is requirement of an external heat sink for heat removal and temperature control. Research on cooling systems focused on the energy analysis of individual components, cooling tower and heat exchanger network. However, the energy concept, alone is insufficient to describe the energy efficiency of the whole system. In this study, the exergy analysis is applied to evaluate the performance of the circulating cooling water system. To achieve this objective, the exergy destruction of the cooling tower and heat exchanger network in terms of different operational conditions are investigated. The results indicated that the exergy destruction in the cooling tower is increased by increasing the cooling tower inlet temperature; whereas the exergy destruction of the heat exchanger network decreases. Therefore, the problem of cooling water system for performance evaluation becomes an optimisation problem to search for the minimum exergetic destruction. Additionally, the second law efficiency of the cooling tower and water network is studied through the exergetic analysis.

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Gao, Zhen, Amrit Verma, Yuna Zhao, Zhiyu Jiang, and Zhengru Ren. "A Summary of the Recent Work at NTNU on Marine Operations Related to Installation of Offshore Wind Turbines." In ASME 2018 37th International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/omae2018-78334.

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In this paper, a summary of the recent work at NTNU on the installation of offshore wind turbines using jack-up and floating vessels will be reported. The wind turbine components considered here are the monopile foundations and the blades. The detailed discussions are given to the crane operations for installing wind turbine blades as well as novel installation methods for pre-assembled rotor-nacelle-tower. It includes numerical modelling and analysis for global dynamic responses of the installation system (installation vessels plus wind turbines) and for local structural responses of the blades in case of contact/impact. In particular, the stochastic nature of the environmental conditions (mainly wind and waves) and their influence on the global dynamic responses of the installation system will be assessed based on time-domain simulations. In addition, tugger line tension control is introduced for the final connection to the hub in order to reduce the motions of the blade and therefore the potential damages to the blades. It is then followed by a discussion about nonlinear structural analysis of the blade in contact with tower or surrounding structures using ABAQUS. Damages in the composite plies and sandwich core materials of the blade due to contact/impact for a given initial velocity are then estimated. The obtained damage distribution formulates the basis for a probabilistic assessment of structural safety during installation. Novel installation methods in which the rotor-nacelle-tower structure is pre-assembled onshore and installed on top of the foundation offshore, and the corresponding installation vessels are discussed at the end of the paper. Finally, the main conclusions and the recommendations for future work are drawn.

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Taylor, Grahame, Jonathan Wylde, and Bridgette Allan. "Novel H2S Scavenger Testing Methodology to Meet the Ever-Present Challenge of Simulating Scavenger Application Methods with Laboratory Testing Protocols." In SPE International Conference on Oilfield Chemistry. SPE, 2021. http://dx.doi.org/10.2118/204356-ms.

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Abstract The design methodology for H2S scavengers relies heavily on developing a test protocol that most closely simulates field applications. These include gas contact towers, direct gas production injection and multiphase treatments, such as subsea umbilical delivery lines to sea floor well heads, hydrocarbon flow lines and sour storage tank treatments. There are very few testing standards and while there are industry accepted methods, the novel methods presented fill the gaps that exist. A thorough review is made of existing test methodologies such as the static gas breakthrough test and the multiphase Parr Autoclave. Each of these has become an accepted, albeit unofficial, industry standard. Novel methods recently developed comprise the "Direct Injection Laboratory Simulator" (DILS) which, as the name suggests, represents a laboratory method of evaluating a direct gas injection application. Also included is a unique modification of the gas breakthrough test, known as the "miniature Ultrafab tower" which simulates a regenerative tower-based system, commonly in operation in the field. The results showed fascinating validation of gas direct injection and dynamic tower interactions. In some cases, the results are as expected and in others fresh insight has been obtained into any observed discrepancy between a scavenger's field performance and how it performs in the laboratory development studies. In the case of the "miniature Ultrafab tower", this ingenious piece of equipment has been proven to accurately simulate the packing typically seen in the gas contactor to enhance gas/liquid interaction as well as provides the ability to continually replenish the tower with fresh chemical during the test using an accurately controlled flow rate from an HPLC pump. These have been shown to be vitally important parameters for accurate lab to field correlation and are uniquely available from this test, for example gleaning the minimum flow rate of fresh scavenger which can control the H2S concentration to the predetermined level; exactly as is done in field operations. This novel apparatus also has a separator chamber where the spent chemical can be collected, analyzed and evaluated, exactly as is done in a field trial for a dynamic contact gas tower. Armed with a new series of test methodologies, the development of H2S scavengers can enjoy a much higher success rate in the all-important transition from laboratory to field. The test methods also give invaluable tools to trouble shooting and investigate unexpected deficiencies in products which have in the past performed as expected. This includes providing a validation method for changes and enhancements desired during the manufacture process and raw material sourcing for chemical scavengers.

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Aldana, Andrés, Diego Guillen, Antonio Bula, and Marco Sanjuan. "Development of a Predictive Model for the Mass Transfer on the Paddy Rice (Oryza Sativa) Tower Drying Operation at Industrial Scale." In ASME 2017 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/imece2017-71600.

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Paddy drying is one of the main operations on the rice milling industry and it has a wide impact in terms of kernel quality, infestation reduction and costs of operation. That is why process control is one of the main fields to ensure a successful operation. This paper presents the development of an industrial scale drying rate prediction model. The model includes on his structure mass balance equations, drying rate and bulk density equation and an experimental expression that estimates the rate of change in moisture as a function of the dry basis kernel water fraction, Sherwood number, mass transfer Biot number and a proposed non-dimensional temperature -Nt-. The importance of including -Nt- parameter is based on the thermal gradients between the drying air, internal kernel water and the installation environmental conditions. These factors create a distinctive characteristic from other drying rate prediction models because they associate the process with environmental conditions of the location where drying operation takes place.

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Bulgarino, Nicole A. "Savannah River Site Biomass Cogeneration Facility." In ASME 2013 Power Conference. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/power2013-98160.

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Ameresco & Department of Energy Savannah River partnered together to install three biomass fueled energy plants. The main plant is a 20 megawatt steam power plant and the other two smaller plants are thermal heating plants. All three facilities are located on the Department of Energy Savannah River Site (SRS). These facilities were developed and financed under an Energy Savings Performance Contract (ESPC), which utilizes energy and operational savings to fund the capital investment and operations cost over the performance period. Ameresco was fully responsible for the design, installation, oversight, management, safety, environmental compliance, and continues to be responsible for the operations and maintenance of the Biomass Cogeneration Facility. This is the largest biomass facility installed under ESPC in the federal government. The facilities have the capacity to combust 385,000 tons of forest residue annually. In the first year alone, the energy and operation cost savings at SRS is in excess of $34 million. Clean biomass and bio-derived fuels (such as tire derived fuel and untreated pallets) is the primary fuel source for all of the new boilers. Biomass is used to fuel two steam boilers capable of producing 240,000 lb. /hr. of high-pressure steam and to power a steam turbine capable of generating up to 20 MW of electricity. The smaller thermal plants provide biomass-produced steam for the areas’ heating and industrial processes. These plants satisfy winter steam requirements for both domestic heat and process steam and is fueled solely with biomass wood chips, utilizing fuel oil as backup source of fuel. Key benefits of the SRS biomass project include: • Over 2,000,000 MBtu/yr. of thermal renewable energy production and a minimum of generation of 77,000,000 kWh of green power • Annual Energy Reductions of approximately 500,000 MBtu/yr. • No-cost Renewable Energy Credits retained by the DOE SR • Support of the South Carolina Biomass Council Goals • Decrease of water intake from the Savannah River by 1,400,000 kgal/yr., supporting water conservation efforts in the region • Reduction of 400 tons/yr. of Particulate Matter (PM) emissions • Reduction of 3,500 tons/yr. of Sulfur Dioxide emissions • Reduction of 100,000 tons/yr. of Carbon Dioxide emissions The smaller heating plants include the main boiler systems and live bottom trailer fuel storage. The Biomass Cogeneration Facility includes the biomass boiler systems, the steam turbine generation system, and the facility auxiliary systems as well as the site infrastructure within these boundaries. The Facility has been designed, built, and tested per industrial/commercial codes for cogeneration facilities. The main components of the Facility are listed below: • Fuel Yard – Material Unloading & Storage and Delivery System ○ Biomass Fuel Chip unloading system ○ Fuel Storage Area ○ Transfer conveyors ○ Fuel Screening System ○ Tire Derived Fuel Storage & Unloading Area ○ Whole Log Chipping System & Storage • Water Treatment System – Water treatment system to treat river water for use in boilers as well as cooling tower for condensing turbine • Boiler Systems – (2) Boiler Island from metering bin, water side and flue gas side, pollution control devices and stacks • Chemical Treatment System – Chemical skids, injection skids for cooling tower and boiler treatment • Steam Turbine Generator System & Turbine Cooling System – (1) steam turbine and generator & Cooling Tower with cooling tower pumps • Emergency Generator System – (1) back diesel generator • Plant Control System – Master SCADA system which integrates all systems and balance of plant equipment I/O into one control system

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Звіти організацій з теми "Control Tower Operations"

Allen, Charles, Kenneth Branton, Patricia Slade, and Chris Taylor. Final Environmental Assessment, Construction and Operation of Air Traffic Control Tower. Fort Belvoir, VA: Defense Technical Information Center, May 2008. http://dx.doi.org/10.21236/ada634607.

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