Tesi: "Departure"

1

Cavusoglu, Ergin. "Places of departure". Thesis, University of Portsmouth, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.515535.

Testo completo

Abstract (sommario):

This PhD by Publication reflects on a program of research, which is informed by a number of approaches developed and manifested in debates surrounding the theory and practice of the use of video and sound installations in a contemporary art context. The submission brings together key critically recognised accomplishments in my exhibited and published body of work, which address the broader themes of 'places of departure' and 'mobile transitions'. It consists of three parts. Each analyses a body of works, including the video and sound installations entitled Point of Departure 2006, Adrift 2006, Quintet Without Borders 2007, Tahtakale 2004, Poised in the Infinite Ocean 2004, Downward Straits 2004, and Entanglement 2003. My practice has been informed significantly by theories and themes surrounding the notions of liminality, border crossing, mobility and ideas on place, placelesness and space. The explorations of these ideas have manifested themselves in architecturally and sonically complex types of installations, each informing and contributing to knowledge from a different perspective. The contextual nature of the works and the development of technical knowledge have formed the basis of what can be described as a research based approach to new video and audio installation techniques and they have provided the basis for this submission. This becomes evident on a number of levels specifically at a time when video art installation practice has become increasingly popular, and the use of new technologies widely available and accessible for artists. For the purpose of this PhD by Publication I have chosen a particular selection of works, which demonstrate the ability of contemporary art practice to contribute in unique and innovative ways to the field of knowledge surrounding understandings of place and mobility.

Gli stili APA, Harvard, Vancouver, ISO e altri

2

Shaw, Nelson Edward. "An isolated departure". The Ohio State University, 1991. http://rave.ohiolink.edu/etdc/view?acc_num=osu1328287453.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

3

Shah, Manan H. (Manan Harish) 1977. "Arrival / departure : architecture of dislocation". Thesis, Massachusetts Institute of Technology, 2002. http://hdl.handle.net/1721.1/70351.

Testo completo

Abstract (sommario):

Thesis (M. Arch.)--Massachusetts Institute of Technology, Dept. of Architecture, 2002.
Includes bibliographical references (p. 76-77).
Our identities are defined by a qualitative set of parameters that are at once universal and site specific. We are, as an old saying puts it, "products of our environment." Our knowledge and our beings are constantly being tested and changed through our interactions, both physical and cerebral, in our environments. Historically this sphere of influence was rather narrow, but as technology and travel have increased, environments have become fragmented; they no longer have clear edges, are discontinuous, and above all, are always changing. I am at once a product of where I live, where my parents lived, where I study, what I have read about, where I have traveled, and where I dream to be. I consequently have many homes, many anchors, and many points of reference. The following architectural thesis investigations study architectural responses to the complexity of the conditions created in individuals and communities through the modern migratory process. Using the theme of ambivalence (the coexistence of opposing attitudes or feelings), this thesis addresses many independent and overlapping issues of identity and migration from both the scale of object and architecture. The thesis posits the question: is an architectural infrastructure possible that can allow for communication between migrants and local communities and between migrants themselves that can span time, language, and space? And can such infrastructure protect ethnicity while still allowing to be shared?
by Manan H. Shah.
M.Arch.

Gli stili APA, Harvard, Vancouver, ISO e altri

4

Vanderson, William W. (William Walter) 1977. "Improving aircraft departure time predictability". Thesis, Massachusetts Institute of Technology, 2000. http://hdl.handle.net/1721.1/36102.

Testo completo

Abstract (sommario):

Thesis (M.Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2000.
Includes bibliographical references (p. 88).
In this thesis, a forecasting model is described that improves departure predictions over those of Collaborative Decision Making (CDM), reducing error by up to 30% for a given day. This model propagates delay from incoming flights to outgoing flights by using minimum turn times calculated from Airline Service Quality Performance (ASQP) data. The model was run on data covering every day of March, April, and May of 1999, and produced departure predictions 6 hours, 4 hours, 2 hours, and 1 hour in advance of departure time. The greatest improvement on CDM predictions was achieved in the 4-hour predictions.
by William W. Vanderson.
M.Eng.

Gli stili APA, Harvard, Vancouver, ISO e altri

5

Saunders, Josiah Paul. "Kant's Departure from Hume's Moral Naturalism". Thesis, University of Canterbury. Philosophy and Religious Studies, 2007. http://hdl.handle.net/10092/992.

Testo completo

Abstract (sommario):

This thesis considers Kant's departure from moral naturalism. In doing so, it explores the relationship between ethics, naturalism, normativity and freedom. Throughout this exploration, I build the case that Kant's ethics of autonomy allows us to make better sense of ethics than Hume's moral naturalism. Hume believes that morality is ultimately grounded in human nature. Kant finds this understanding of ethics limiting. He insists that we are free - we can critically reflect upon our nature and (to an extent) alter it accordingly. This freedom, I contend, renders the moral naturalist's appeal to nature lacking. Of course, a Kantian conception of freedom - some form of independence from the causal order - is fairly unpopular in contemporary circles. In particular, a commitment to naturalism casts doubt on such a notion of freedom. I argue with Kant that such a conception of freedom is essential to the conception of ourselves as rational agents. The critical turn, unlike naturalism, warrants this conception of freedom, accommodating the point of view of our rational agency. It thus allows Kant's ethics of autonomy to better grasp certain key elements of morality - normativity and our agency - than Hume's moral naturalism.

Gli stili APA, Harvard, Vancouver, ISO e altri

6

Carter, Matt. "Departure a novella and other stories /". Morgantown, W. Va. : [West Virginia University Libraries], 2001. http://etd.wvu.edu/templates/showETD.cfm?recnum=1867.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

7

Almgren, Erik. "Sensor Fusion for Enhanced Lane Departure Warning". Thesis, Linköping University, Department of Electrical Engineering, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-7707.

Testo completo

Abstract (sommario):

A lane departure warning system relying exclusively on a camera has several shortcomings and tends to be sensitive to, e.g., bad weather and abrupt manoeuvres. To handle these situations, the system proposed in this thesis uses a dynamic model of the vehicle and integration of relative motion sensors to estimate the vehicle’s position on the road. The relative motion is measured using vision, inertial, and vehicle sensors. All these sensors types are affected by errors such as offset, drift and quantization. However the different sensors are sensitive to different types of errors, e.g., the camera system is rather poor at detecting rapid lateral movements, a type of situation which an inertial sensor practically never fails to detect. These kinds of complementary properties make sensor fusion interesting. The approach of this Master’s thesis is to use an already existing lane departure warning system as vision sensor in combination with an inertial measurement unit to produce a system that is robust and can achieve good warnings if an unintentional lane departure is about to occur. For the combination of sensor data, different sensor fusion models have been proposed and evaluated on experimental data. The models are based on a nonlinear model that is linearized so that a Kalman filter can be applied. Experiments show that the proposed solutions succeed at handling situations where a system relying solely on a camera would have problems. The results from the testing show that the original lane departure warning system, which is a single camera system, is outperformed by the suggested system.

Gli stili APA, Harvard, Vancouver, ISO e altri

8

Burgain, Pierrick Antoine. "On the control of airport departure operations". Diss., Georgia Institute of Technology, 2010. http://hdl.handle.net/1853/37261.

Testo completo

Abstract (sommario):

This thesis is focused on airport departure operations; its objective is to assign a value to surface surveillance information within a collaborative framework. The research develops a cooperative concept that improves the control of departure operations at busy airports and evaluates its merit using a classical and widely accepted airport departure model. The research then assumes departure operations are collaboratively controlled and develops a stochastic model of taxi operations on the airport surface. Finally, this study investigates the effect of feeding back different levels of surface surveillance information to the departure control process. More specifically, it examines the environmental and operational impact of aircraft surface location information on the taxi clearance process. Benefits are evaluated by measuring and comparing engine emissions for given runway utilization rates.

Gli stili APA, Harvard, Vancouver, ISO e altri

9

Dissel, Adam F. "Departure phase aborts for manned Mars missions". College Park, Md. : University of Maryland, 2007. http://hdl.handle.net/1903/6761.

Testo completo

Abstract (sommario):

Thesis (Ph. D.) -- University of Maryland, College Park, 2007.
Thesis research directed by: Aerospace Engineering. Title from t.p. of PDF. Includes bibliographical references. Published by UMI Dissertation Services, Ann Arbor, Mich. Also available in paper.

Gli stili APA, Harvard, Vancouver, ISO e altri

10

Chin, Kian Keong. "Departure time choice in equilibrium traffic assignment". Thesis, University of Leeds, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.364638.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

11

Mun, Jin-Su. "Dynamic traffic assignment models with departure timechoice". Thesis, University College London (University of London), 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.396430.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

12

Wang, Shan. "The Traveler's Journey: from departure to arrival". Thesis, Boston University, 2007. https://hdl.handle.net/2144/28591.

Testo completo

Abstract (sommario):

Boston University. University Professors Program Senior theses.
PLEASE NOTE: Boston University Libraries did not receive an Authorization To Manage form for this thesis. It is therefore not openly accessible, though it may be available by request. If you are the author or principal advisor of this work and would like to request open access for it, please contact us at open-help@bu.edu. Thank you.
2031-01-02

Gli stili APA, Harvard, Vancouver, ISO e altri

13

Gunhardson, Erica. "Indoor Positioning Using Angle of Departure Information". Thesis, Linköpings universitet, Fysik och elektroteknik, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-122914.

Testo completo

Abstract (sommario):

I detta examensarbete undersöks möjligheten att kunna använda en positioneringsmetod som inte enbart förlitar sig på den uppmätta signalstyrkan. Istället används en metod som bestämmer från vilken vinkel en signal uppkommer ifrån. Den här tekniken kallas för direction-finding. När informationen om signalens vinkel fastställts används den i ett positioningsfilter som uppskattar positionen. Två tillvägagångssätt har använts i den här rapporten, ett där enbart vinkeln används och ett där både signalstyrka och vinkel används.

Gli stili APA, Harvard, Vancouver, ISO e altri

14

Shields, Billy. "Brazil's mission to Haiti continuity or departure? /". [Gainesville, Fla.] : University of Florida, 2006. http://purl.fcla.edu/fcla/etd/UFE0014413.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

15

Green, David Anthony. "Departure processes from MAP/PH/1 queues". Title page, contents and abstract only, 1999. http://thesis.library.adelaide.edu.au/public/adt-SUA20020815.092144.

Testo completo

Abstract (sommario):

Bibliography: leaves 145-150. Electronic publication; Full text available in PDF format; abstract in HTML format. A MAP/PH/1 queue is a queue having a Markov arrival process (MAP), and a single server with phase-type (PH-type) distributed service time. This thesis considers the departure process of these types of queues, using matrix analytic methods, the Jordan canonical form of matrices, non-linear filtering and approximation techniques. Electronic reproduction.[Australia] :Australian Digital Theses Program,2001.

Gli stili APA, Harvard, Vancouver, ISO e altri

16

Robeson, Isaac J. "A departure regulator for closely spaced parallel runways". Thesis, Georgia Institute of Technology, 2011. http://hdl.handle.net/1853/42783.

Testo completo

Abstract (sommario):

Increased efficiency at airports is necessary to reduce delays and fuel consumption. Many of the busiest airports in the nation have at least one pair of closely spaced parallel runways (CSPRs), defined by a separation of less than 2500 ft, with one runway dedicated to arrivals and the other to departures. CSPRs experience a large decrease in capacity under instrument conditions because they can no longer operate independently. In order to mitigate this decrease in capacity and to increase efficiency, proposed herein is a departure regulator for runways so configured, along with a plan of study to investigate the effects of this regulator. The proposed departure regulator makes use of data from precision tracking systems such as ADS-B to issue automated or semi-automated departure clearances. Assuming sequential departure separations are sufficient for clearance, the regulator will automatically issue, or advise the controller to issue, the departure clearance as soon as the arrival on the adjacent runway has descended below its decision height. By issuing the departure clearance earlier, the departure regulator reduces the gap between a pair of arrivals that is required to clear a departure. By decreasing the gap, the regulator increases the number of opportunities where a departure clearance can be issued, given a particular arrival stream. A simulation models the effects of the regulator and quantifies the resulting increases in capacity. The simulation results indicate that all forms of the regulator would provide significant gains of between 14% and 23% in capacity over the current operating paradigm. The results also indicate that the capacity gains are greatest at high arrival rates. Therefore, implementation of the departure regulator could significantly decrease the congestion at many major airports during inclement weather.

Gli stili APA, Harvard, Vancouver, ISO e altri

17

Nilsson, Axel, e Filip Skogstjärna. "Development of a Web Based Departure Control System". Thesis, Linköpings universitet, Programvara och system, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-137689.

Testo completo

Abstract (sommario):

A departure control system (DCS) is an administrative tool used by airports to handle boarding and baggage management. However the DCSs used by smaller swedish airports are outdated and tied to desktop applications which are a hassle to update. The solution to this problem is to develop a new web based DCS. A DCS needs hardware to fully function (scanners, printers), this poses the problem of communicating between a web browser and hardware. To solve this problem a local server was developed to handle the hardware and communication with the browser which was then integrated into a web application. When developing the DCS, readability and further development was kept in mind making code quality and code commenting key factors. To evaluate whether these factor positively affected readability, an interview was conducted. The foundation of a web based DCS was developed and according to the interview results the conclusions is that code commenting, proper naming and modularity increases source code comprehension.

Gli stili APA, Harvard, Vancouver, ISO e altri

18

Dossman, Bryant C. "Stopover Departure and Movement Behaviors of Migratory Songbirds". The Ohio State University, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=osu1428055119.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

19

York, Brent W. "Aircraft departure resistance prediction using structured singular values". Thesis, This resource online, 1993. http://scholar.lib.vt.edu/theses/available/etd-07212009-040352/.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

20

Chow, A. H. F. "System optimal traffic assignment with departure time choice". Thesis, University College London (University of London), 2007. http://discovery.ucl.ac.uk/19591/.

Testo completo

Abstract (sommario):

This thesis investigates analytical dynamic system optimal assignment with departure time choice in a rigorous and original way. Dynamic system optimal assignment is formulated here as a state-dependent optimal control problem. A fixed volume of traffic is assigned to departure times and routes such that the total system travel cost is minimized. Although the system optimal assignment is not a realistic representation of traffic, it provides a bound on performance and shows how the transport planner or engineer can make the best use of the road system, and as such it is a useful benchmark for evaluating various transport policy measures. The analysis shows that to operate the transport system optimally, each traveller in the system should consider the dynamic externality that he or she imposes on the system from the time of his or her entry. To capture this dynamic externality, we develop a novel sensitivity analysis of travel cost. Solution algorithms are developed to calculate the dynamic externality and traffic assignments based on the analyses. We also investigate alternative solution strategies and the effect of time discretization on the quality of calculated assignments. Numerical examples are given and the characteristics of the results are discussed. Calculating dynamic system optimal assignment and the associated optimal toll could be too difficult for practical implementation. We therefore consider some practical tolling strategies for dynamic management of network traffic. The tolling strategies considered in this thesis include both uniform and congestion-based tolling strategies, which are compared with the dynamic system optimal toll so that their performance can be evaluated. In deriving the tolling strategies, it is assumed that we have an exact model for the underlying traffic behaviour. In reality, we do not have such information so that the robustness of a toll calculation method is an important issue to be investigated in practice. It is found that the tolls calculated by using divided linear traffic models can perform well over a wide range of scenarios. The divided linear travel time models thus should receive more attention in the future research on robust dynamic traffic control strategies design. In conclusion, this thesis contributes to the literature on dynamic traffic modelling and management, and to support further analysis and model development in this area.

Gli stili APA, Harvard, Vancouver, ISO e altri

21

Nosedal-Sánchez, Jenaro. "Aircraft departure synchronization to reduce ATC en route interventions". Doctoral thesis, Universitat Autònoma de Barcelona, 2016. http://hdl.handle.net/10803/384849.

Testo completo

Abstract (sommario):

La investigación que se presenta en esta tesis, se enfoca en el análisis a nivel micro y macro de la posiciones atemporales de trayectorias aéreas en la fase de ruta, obtenidas a partir del uso de una transformación bidimensional (posiciones de latitud y longitud) transformación D y de la aplicación de modelos causales y técnicas de programación por restricciones para simular y validar un proceso de ajuste acotado de tiempos de despegue que conserva las ventanas de salida programadas y al mismo tiempo relaja las interdependencias tensas entre trayectorias 4D (reduciendo o resolviendo desequilibrios entre demanda y capacidad en el espacio aéreo). La investigación desarrollada, con la finalidad de producir sinergias entre los Usuarios del espacio aéreo (AUs) y simultáneamente para reducir las intervenciones de Control de Tráfico Aéreo (ATC) en ruta, en vez de revisar el sistema de Gestión de Tráfico Aéreo de manera fragmentada, propone un marco innovador que soporta una análisis exhaustivo de las interdependencias entre Gestión de Flujo de Tráfico Aéreo y Gestión de la Capacidad (ATFCM), Gestión de Despegues (DMAN) y las Trayectorias Comerciales de Referencia (RBTs) acordadas. El objetivo general de este trabajo es aportar a la literatura con el uso de combinaciones robustas de marcas temporales de las RBTs que preservan los perfiles 3D acordados dentro de un conjunto de trayectorias competitivas y colaborativas bajo un enfoque global que reducen al mínimo las intervención de ATC. Adicionalmente, el enfoque propuesto permite la vinculación de parte de tierra con las operaciones del lado aire, y habilita la conexión entre los requerimientos de los AUs dentro de la red de tráfico, por lo que proporciona un marco para implementar nuevas herramientas de apoyo en las decisiones (DST) para el desarrollo de servicios ATFCM más competitivos y colaborativos.
The research work presented in this thesis focuses on the micro and macro analysis of the untimed en route waypoints of aircraft trajectories obtained after applying a bi-dimensional (i.e. latitude and longitude positions) D - transform and on the application of causal modelling and constraint programming (CP) techniques to simulate and validate a departure-time-bounded adjustment process that preserves the scheduled slots while relaxing tight 4DT interdependences (for instance, reducing or solving airspace demand - capacity imbalances). The research developed instead of a fragmented look at the Air Traffic Management (ATM) system, in order to generate synergies between airspace users (AUs) while reducing Air Traffic Control (ATC) interventions, proposes an innovative framework supporting a comprehensive analysis of interdependencies between Air Traffic Flow and Capacity Management (ATFCM), Departure Management (DMAN) and the agreed Reference Business Trajectories (RBTs). The overarching goal of this dissertation is to contribute to the literature about the use of robust combination of RBT's time stamps preserving the 3D agreements into a set of collaborative-competitive trajectories under a global scope with minimum ATC interventions. Furthermore, the proposed approach allows the linkage of land side with air side operations, and enables the connection between AUs requirements within the traffic network, thus provides a framework to deploy new Decision Support Tools (DSTs) towards more collaborative and competitive ATFCM services.

Gli stili APA, Harvard, Vancouver, ISO e altri

22

Kope, Jared. "Empowerment and Unlearning: A Departure Towards Inter-Cultural Understanding". Thèse, Université d'Ottawa / University of Ottawa, 2014. http://hdl.handle.net/10393/31140.

Testo completo

Abstract (sommario):

This thesis includes two stand-alone articles with the overall purpose of critically exploring experiences related to sport-for-development from the program participants’ perspective on the one hand, and from the practitioners’ perspective on the other. After outlining the research objectives and present a review of literature, theoretical framework, epistemology, methodology, methods, and analysis, the first article focuses on the YLP participants’ experiences with a particular interest on empowerment processes. Specifically, I employed a Critical Youth Empowerment (CYE) framework in relation to youth experiences and larger community involvement with youth programming (Jennings et al., 2006). Photovoice was conducted and supplemented with eleven semi-structured interviews, one focus group and a month-long participant observation. The above-mentioned research was juxtaposed with a second article presenting an autoethnographic account of my own experiences as a practitioner and researcher. My autoethnography mixes theory, methodology, and methods throughout the narrative. My hope was to produce a theoretically rich and reflexive account of the experiences that led me to conceptualize sport-for-development differently. This self-critical piece aims at providing an opportunity for readers to reflect upon and hopefully challenge their own practices, knowledge production, and research orthodoxy.

Gli stili APA, Harvard, Vancouver, ISO e altri

23

Pagliari, Romano Italo. "Estimating the monetary value of airport runway departure slots". Thesis, Cranfield University, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.245446.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

24

AGUIAR, HELENA CARNEIRO. "WHEN DEPARTURE PRECEDING THE ARRIVAL: SINGULARITIES OF FETAL DEATH". PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2016. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=29368@1.

Testo completo

Abstract (sommario):

PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO
COORDENAÇÃO DE APERFEIÇOAMENTO DO PESSOAL DE ENSINO SUPERIOR
PROGRAMA DE SUPORTE À PÓS-GRADUAÇÃO DE INSTS. DE ENSINO
O presente trabalho tem como finalidade refletir sobre as particularidades e vicissitudes do óbito fetal, destacando o estatuto virtual do objeto perdido (embrião ou feto). O óbito fetal ocorre justamente no momento marcado por oscilação entre dimensões de indiferenciação e de diferenciação. A gravidez suscita uma nova organização psíquica, visando à construção da parentalidade e a interrupção abrupta deste processo durante a gestação exige um trabalho de elaboração psíquica bastante singular. A dificuldade em lidar com o óbito fetal afeta a todos os envolvidos – evidentemente os familiares, mas também os profissionais de saúde. Algumas vezes, o trabalho de luto pode não ser possível pela dificuldade de inserir o evento em uma cadeia simbólica que permita sua elaboração e introjeção. Nesses casos, destaca-se a via da melancolia por constituir-se uma opção, por vezes, mais disponível aos pais diante da morte do filho. Na melancolia não está claro o que foi perdido, a perda é recusada e, através da identificação narcísica, o melancólico mantém o objeto dentro de si. Os pais que perderam tão precocemente seus filhos terão que descobrir uma forma de fazer face ao insuportável desta perda, destacando-se a importância de uma saída criativa.
The aim of this paper is to reflect on the particularities and vicissitudes of fetal death, focusing on the virtuality of the lost object (embryo or fetus). Fetal death occurs in a moment of oscillation between differentiation and undifferentiation. During pregnancy the psychic structure begins to change in order to prepare the future parents for the maternal and paternal role. Fetal death abruptly interrupts this process, thus demanding a particular psychological work. Dealing with fetal death affects everyone around, although more evidently the family, but also health professionals. Sometimes, the mourning may not be possible, because it may be difficult to include the event in a symbolic chain that allows its development and internalization. In such cases, the path of melancholy stands out, because often its an easier option for parents. In melancholy, what was lost is not clear, loss is refused by a narcissistic identification; melancholic people maintain the object inside. Parents who lost their children so early have to find a way to cope with the unbearable, and the importance of creative possibilities should be highlighted.

Gli stili APA, Harvard, Vancouver, ISO e altri

25

Simaiakis, Ioannis. "Analysis, modeling and control of the airport departure process". Thesis, Massachusetts Institute of Technology, 2013. http://hdl.handle.net/1721.1/79342.

Testo completo

Abstract (sommario):

Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 2013.
This electronic version was submitted and approved by the author's academic department as part of an electronic thesis pilot project. The certified thesis is available in the Institute Archives and Special Collections.
Cataloged from department-submitted PDF version of thesis.
Includes bibliographical references (p. 305-313).
Increased air traffic demand over the past two decades has resulted in significant increases in surface congestion at major airports in the United States. The overall objective of this thesis is to mitigate the adverse effects of airport surface congestion, including increased taxi-out times, fuel burn, and emissions. The thesis tackles this objective in three steps: The first part deals with the analysis of departure operations and the characterization of airport capacity; the second part develops a new model of the departure process; and the third part of the thesis proposes and tests, both on the field and in simulations, algorithms for the control of the departure process. The characterization and estimation of airport capacity is essential for the successful management of congestion. This thesis proposes a new parametric method for estimating the departure capacity of a runway system, the most constrained element of most airports. The insights gained from the proposed technique are demonstrated through a case study of Boston Logan International Airport (BOS). Subsequently, the methodology is generalized to the study of interactions among the three main airports of the New York Metroplex, namely, John F. Kennedy International Airport (JFK), Newark Liberty International Airport (EWR) and LaGuardia Airport (LGA). The individual capacities of the three airports are estimated, dependencies between their operations are identified, and the capacity of the Metroplex as a whole is characterized. The thesis also identifies opportunities for improving the operational capacity of the Metroplex without significant redesign of the airspace. The proposed methodology is finally used to assess the relationship between route availability during convective weather and the capacity of LGA. The second part of the thesis develops a novel analytical model of the departure process. The modeling procedure includes the estimation of unimpeded taxi-out time distributions, and the development of a stochastic and dynamic queuing model of the departure runway(s), based on the transient analysis of D(t)=Ek(t)=1 queuing systems. The parameters of the runway service process are estimated using operational data. Using the aircraft pushback schedule as input, the model predicts the expected runway schedule and the takeoff times. It also estimates the expected queuing delay and its variance for each light, along with the congestion level of the airport, sizes of the departure queues, and the departure throughput. The model is trained using data from EWR in 2011, and is subsequently used to predict taxi-out times at EWR in 2007 and 2010. The final part of this thesis proposes dynamic programming algorithms for controlling the departure process, given the current operating environment. These algorithms, called Pushback Rate Control protocols, predict the departure throughput of the airport, and recommend a rate at which to release pushbacks from the gate in order to control congestion. The thesis describes the design and field-testing of a variant of Pushback Rate Control at BOS in 2011, and the development of a decision-support tool for its implementation. The analysis shows that during 8 four-hour test periods, fuel use was reduced by an estimated 9 US tons (2,650 US gallons), and taxi-out times were reduced by an average of 5.3 min for the 144 flights that were held at the gate. The thesis concludes with simulations of the Pushback Rate Control protocol at Philadelphia International Airport (PHL), one of the most congested airports in the US, and a discussion of the potential benefits and implementation challenges.
by Ioannis Simaiakis.
Ph.D.

Gli stili APA, Harvard, Vancouver, ISO e altri

26

Chopra, Varun Nikhil G. "Monitoring vehicle entry and departure through location-based services". Thesis, California State University, Long Beach, 2015. http://pqdtopen.proquest.com/#viewpdf?dispub=1603970.

Testo completo

Abstract (sommario):

Shipping ports and terminals are usually very busy with high traffic duration times. The high trafficked areas of shipping terminals at ports often contribute to the high density traffic volume which affects the community and the port by possibly extending commuters' travel time, delaying shipments of goods, and potentially being a safety hazard. Location-based services would be able to measure the time a vehicle enters and exits the terminals at the port. Location-based services such as geofencing would help determine entry and exit times of vehicles. These services would be used in hopes of determining an efficient way to reduce traffic conditions by notifying terminals of entry and departure times of vehicles. By gathering travel times of vehicles, a process could be developed by representatives of the terminals at the port to more efficiently operate. A system which consists of two architectures is built to gather adequate travel times. The first system is a server side application with REST endpoints exposed and the second application is a client side application which consumes those endpoints. This study provides an analysis and implementation on how location-based services establishes a means to measure entry and exit times of vehicles moving through geofenced gates.

Gli stili APA, Harvard, Vancouver, ISO e altri

27

Tap, Hans. "Do you mean here? Points of departure for design". Licentiate thesis, Blekinge Tekniska Högskola, Institutionen för arbetsvetenskap och medieteknik, 2001. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-00209.

Testo completo

Abstract (sommario):

It has been recognised that there is a need to get a better understanding of the user of technology in work as information technology progressively saturates users' everyday working environments. One motivating force has been a perceived need to link the design of new technology with the work actually being done. One way to do this has been to turn to ethnography as an analytic approach when studying work, and then try to relate the results to design in different ways. The main question in this thesis is precisely how technology is being used in everyday work activity. The individual papers include discussions about what the resulting analyses can do for design. The contributions from the analyses do nog guide design in any 'linear' way but can be brought to the 'design table' and serve as points of departures for design considerations.

Gli stili APA, Harvard, Vancouver, ISO e altri

28

Drazovich, Spencer. "Factors Effecting Departure Delays in Multi-Airport U.S. Regions". Scholarship @ Claremont, 2017. http://scholarship.claremont.edu/cmc_theses/1456.

Testo completo

Abstract (sommario):

For many metropolitan areas in U.S., flight traffic is distributed between multiple airports that service the region. Since 2008, there are trends showing that in certain multi-airport regions, flight traffic is being consolidated toward one “dominant” airport (as in LA) where as in other regions, departure traffic is becoming more evenly distributed between the multiple airports. The purpose of this study is to examine the effects these trends in departure volume are having on overall departure delay times in these regions. For this analysis, data from the airports in Los Angeles, San Francisco, New York, Washington, D.C. and Chicago are included. Based on the results of this research, there is evidence that the dominant hub model as evidenced in LA with LAX, is preferable when managing delays to a more dispersed model showcased in DC.

Gli stili APA, Harvard, Vancouver, ISO e altri

29

Danely, Jason Allen. "Departure and return abandonment, memorial and aging in Japan /". Diss., Connect to a 24 p. preview or request complete full text in PDF format. Access restricted to UC campuses, 2008. http://wwwlib.umi.com/cr/ucsd/fullcit?p3324442.

Testo completo

Abstract (sommario):

Thesis (Ph. D.)--University of California, San Diego, 2008.
Title from first page of PDF file (viewed October 3, 2008). Available via ProQuest Digital Dissertations. Vita. Includes bibliographical references (p. 364-391).

Gli stili APA, Harvard, Vancouver, ISO e altri

30

Stumm, Brian J. "An investigation on bubble departure in subcooled flow boiling /". Online version of thesis, 1993. http://hdl.handle.net/1850/11186.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

31

Abbott, Troy D. "Aircraft stability and departure prediction using Eigenvalue Sensitivity analysis". Thesis, This resource online, 1995. http://scholar.lib.vt.edu/theses/available/etd-06112009-063745/.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

32

Vautard, Félix. "Improvement of departure time suitability for interregional rail timetables". Licentiate thesis, KTH, Transportplanering, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-272220.

Testo completo

Abstract (sommario):

In order to respond to growing interregional rail traffic, rail capacity should be allocated better. To achieve this, one possibility is to optimise suitability of departure times for rail passengers in the timetabling process. The suitability of departure and arrival times refers to how well the timetable can diminish constraints on passengers that must adapt their activities to train schedules. However, current knowledge on this issue is limited. Indeed, only few studies have quantified how passengers valuate departure time suitability. These studies are also quite brief in their coverage of the influence of travellers’ profiles on these valuations. In addition, current methods comparing the socioeconomic consequences of different timetables are not applicable in all contexts, and most of them rely on strong simplifications. In summary, this thesis aims to answer the following research questions:

QC 20200423

Gli stili APA, Harvard, Vancouver, ISO e altri

33

Makhele, Tshepiso. "Akhona leaves Generations". Move, 2013. http://encore.tut.ac.za/iii/cpro/DigitalItemViewPage.external?sp=1000725.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

34

Peacock, James. "Points of departure : Paul Auster and the loss of authority". Thesis, University of Edinburgh, 2006. http://hdl.handle.net/1842/25066.

Testo completo

Abstract (sommario):

This thesis argues that the primary catalyst for Paul Auster’s work is the loss of authority. In his poetry this is chiefly the loss of the language’s ability, and hence the poet’s ability to reflect accurately and with sincere attention the objects of the gaze. Following The Invention of Solitude, the absent authority becomes the father and by analogy God and foundational mythologies for national and authorial identity. In Auster’s texts we see two possible reasons for the loss. First, a tendency for characters to retreat melancholically and sophistically into the self. Alternatively characters can seek democratic correlations with others in a more ethical and ultimately more libertine form of mourning.

Gli stili APA, Harvard, Vancouver, ISO e altri

35

Farnsworth, John Seibert. "Coves of departure : field notes from the Sea of Cortez". Thesis, University of Stirling, 2015. http://hdl.handle.net/1893/21811.

Testo completo

Abstract (sommario):

Coves of Departure: Field Notes from the Sea of Cortez is a literary natural history presented in mixed forms of nature memoir, personal essay and redacted field notes. Intended as narrative nonfiction for general readership, it focusses on the natural history of Mexico’s Baja California peninsula, attending especially to the littoral zone of the Sea of Cortez. Numbered chapters narrate several sea kayak expeditions led by the author to the Isla Espiritu Santo archipelago of Baja California Sur. Chapters chronicling discrete expeditions are sectioned off by two long interludes that describe natural history explorations in the northern state, Baja California. The title essay, which transitions between the second interlude and the final chapter, investigates natural history from the perspective of material ecocriticism,.

Gli stili APA, Harvard, Vancouver, ISO e altri

36

Galgamuwa, Uditha Nandun. "Estimating crash modification factors for lane-departure countermeasures in Kansas". Diss., Kansas State University, 2018. http://hdl.handle.net/2097/38756.

Testo completo

Abstract (sommario):

Doctor of Philosophy
Department of Civil Engineering
Sunanda Dissanayake
Lane-departure crashes are the most predominant crash type in Kansas which causes very high number of motor vehicle fatalities. Therefore, the Kansas Department of Transportation (KDOT) has implemented several different types of countermeasures to reduce the number of motor vehicle fatalities associated with lane-departure crashes. This research was conducted to estimate the safety effectiveness of commonly used lane-departure countermeasures in Kansas on all crashes and lane-departure crashes using Crash Modification Factors (CMFs). Paved shoulders, rumble strips, safety edge treatments and median cable barriers were identified as the commonly used lane-departure countermeasures on both tangent and curved road segments while chevrons and post-mounted delineators were identified as the most commonly used lane-departure countermeasures on curved road segments. This research proposes a state-of-art method of estimating CMFs using cross-sectional data for chevrons and post-mounted delineators. Furthermore, another state-of-art method is proposed in this research to estimate CMFs for safety edge treatments using before-and-after data. Considering the difficulties of finding the exact date of implementation of each countermeasure, both cross-sectional and before-and-after studies were employed to estimate the CMFs. Cross-sectional and case-control methods, which are the two major methods in cross-sectional studies were employed to estimate CMFs for paved shoulders, rumble strips, and median cable barriers. The conventional cross-sectional and case-control methods were modified when estimating CMFs for chevrons and post-mounted delineators by incorporating environmental and human behaviors in addition to geometric and traffic-related explanatory variables. The proposed method is novel and has not been used in the previous cross-sectional models available in the literature. Generalized linear regression models assuming negative binomial error structure were used to develop models for cross-sectional method to estimate CMFs while logistic regression models were used to estimate CMFs using case-control method. Results showed that incorporating environmental and human-related variables into cross-sectional models provide better model fit than in conventional cross-sectional models. To validate the developed models for cross-sectional method, mean of the residuals and the Root Mean Square Error (RMSE) were used. For the case-control method, Receiver Operational Characteristic (ROC) was used to evaluate the predictive power of models for a binary outcome using classification tables. However, it was seen that the case-control method is not suitable for estimating CMFs for all crashes since the range of the crash frequency is wide in each road segment. A regression-based method of estimating CMFs using before-and-after data was proposed to estimate CMFs for safety edge treatments. This method allows researchers to identify the safety effectiveness of an individual CMFs on road segments where multiple treatments have been applied at the same time. Since this method uses road geometric and traffic-related characteristics in addition to countermeasure information as the explanatory variables, the model itself would be the Safety Performance Function (SPF). Therefore, developing new SPF is not necessary. Finally, the CMFs were estimated using before-and-after Empirical Bayes method to validate the results from the regression-based method. The results of this study can be used as a decision-making tool when implementing lane-departure countermeasures on similar roadways in Kansas. Even though there are readily available CMFs from the national level studies, having more localized CMFs will be beneficial due to differences in traffic-related and geometric characteristics on different roadways.

Gli stili APA, Harvard, Vancouver, ISO e altri

37

Mori, Brian Katsuo. "Studies of bubble growth and departure from artificial nucleation sites". Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/tape17/PQDD_0009/NQ35258.pdf.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

38

Melocchi, Louis Daniel. "Improving the student departure problem| Instructors, iPads, and adoption theory". Thesis, Argosy University/Phoenix, 2014. http://pqdtopen.proquest.com/#viewpdf?dispub=3583940.

Testo completo

Abstract (sommario):

Increased competitive and regulatory pressures are requiring American universities to find new and innovative models to improve student academic success and college value. Previous research has noted that the introduction of mobile or tablet-based devices into education pedagogies can support learning activities if implemented effectively. This study provides an empirical analysis on the relationship between instructor iPad adoption in classroom learning activities and instructor perceived improvement in student retention rates. An adapted version of the Unified Theory of Acceptance and Use of Technology (UTAUT) model was used as the theoretical model to assess this relationship along with regression analysis to estimate the variance. Overall, the findings validate the application of the UTAUT model towards instructor adoption of iPad technologies in classroom learning activities, and support the supposition that instructors who more readily adopt the use of iPads technologies in their classroom activities also perceive that student retention outcomes can improve by doing so. Social influence and performance expectancy were determined to be the largest factors influencing instructor adoption. Furthermore, the personality traits of versatility, creativity and emotional control were found to have no bearing on the relationship between instructor technology adoption and perceived improvement to student retention. Recommendations for further research included: (a) extending this study to other educational institutions, (b) exploring the relationship between instructor adoption of iPad technology and actual, as opposed to perceived, student retention outcomes, and (c) adapting the theoretical framework used in this study to include perceived student retention as a predictor of intent to adopt.

Gli stili APA, Harvard, Vancouver, ISO e altri

39

Longden, Bernard. "The student departure puzzle : echoes of policy in student experience". Thesis, University of Sheffield, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.274982.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

40

Pujet, Nicolas. "Modeling and control of the departure process of congested airports". Thesis, Massachusetts Institute of Technology, 1999. http://hdl.handle.net/1721.1/9363.

Testo completo

Abstract (sommario):

Thesis (Ph.D.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1999.
Includes bibliographical references (p. 118-121).
A simple queueing model of departure operations at congested airports is proposed. This model is calibrated and validated in the case of Boston Logan airport, using runway configuration and traffic data from the Airline Service Quality Performance (ASQP) dataset. The model is then used to evaluate preliminary departure control schemes aimed at alleviating congestion on the airport surface. The potential impact of these control schemes on direct operating costs, environmental costs and overall delay is quantified and discussed. This thesis also demonstrates that the ASQP dataset does not record enough traffic to precisely identify arrival-departure interaction effects, which results in large uncertainties in the departure model. Since more complete datasets could become available in the near future, the thesis shows how such datasets could be used to reduce the departure model uncertainties.
by Nicolas Pujet.
Ph.D.

Gli stili APA, Harvard, Vancouver, ISO e altri

41

Simaiakis, Ioannis. "Modeling and control of airport departure processes for emissions reduction". Thesis, Massachusetts Institute of Technology, 2009. http://hdl.handle.net/1721.1/58289.

Testo completo

Abstract (sommario):

Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics; and, (S.M. in Technology and Policy)--Massachusetts Institute of Technology, Engineering Systems Division, Technology and Policy Program, 2009.
Cataloged from PDF version of thesis.
Includes bibliographical references (p. 139-141).
Taxiing aircraft contribute significantly to the fuel burn and emissions at airports. This thesis investigates the possibility of reducing fuel burn and emissions from surface operations through a reduction of the taxi times of departing aircraft. Data analysis of the departing traffic in four major US airports provides a comprehensive assessment of the impact of surface congestion on taxi times, fuel burn and emissions. For this analysis two metrics are introduced: one that compares the taxi times to the unimpeded ones and another that evaluates them in terms of their contribution to the airport's throughput. A novel approach is proposed that models the aircraft departure process as a queuing system. The departure taxi (taxi-out) time of an aircraft is represented as a sum of three components: the unimpeded taxi-out time, the time spent in the departure queue, and the congestion delay due to ramp and taxiway interactions. The dependence of the taxi-out time on these factors is analyzed and modeled. The performance of the model is validated through a comparison of its predictions with observed data at Boston's Logan International Airport (BOS). A reduction in taxi times may be achieved through the queue management strategy known as N-Control, which controls the push back process so as to keep the number of departing aircraft on the surface of the airport below a specified threshold. The developed model is used to quantify the impact of N-Control on taxi times, delays, fuel burn and emissions at BOS. Finally, the benefits and implications of N-Control are compared to the ones theoretically achievable from a scheme that controls the takeoff queue of each departing aircraft.
by Ioannis Simaiakis.
S.M.in Technology and Policy
S.M.

Gli stili APA, Harvard, Vancouver, ISO e altri

42

Hagar, LaRita D. "Intercultural learning for international students: Designing a pre-departure orientation". Scholarly Commons, 2014. https://scholarlycommons.pacific.edu/uop_etds/250.

Testo completo

Abstract (sommario):

The State Department conducts exchange programs for thousands of participants each year to build mutual understanding between the citizens of the United States and other countries. At the beginning of each program, inbound exchange students participate in pre-departure orientations to prepare them for their experiences in the United States. It is vital that these pre-departure orientation programs lay the groundwork for mutual understanding by fostering intercultural sensitivity and developing intercultural competence. For this study, I explored best practices for facilitating intercultural learning online among international students and designed an interactive, facilitated, student-centered, and culturally adapted virtual pre-departure orientation that promotes intercultural learning online. Experts evaluated this course plan and their feedback resulted in lessons learned and recommendations for the development phase of instructional design for this course plan.

Gli stili APA, Harvard, Vancouver, ISO e altri

43

Gobin, Bradley Scott. "Quantitative Approach and Departure Risk Assessment for Unmanned Aerial Systems". Thesis, Virginia Tech, 2020. http://hdl.handle.net/10919/100707.

Testo completo

Abstract (sommario):

The usage of unmanned aerial systems (UAS), also called drones, has grown at an increasing rate, with expectations of the number of unmanned aircraft (UA) to triple between 2019 and 2023 as commercial and government usage of UAS increases as per the Federal Aviation Administration. As the usage of UA increases, the probability of a UA crash resulting in injuries of 3rd parties on the ground also increases. The goal of this research was to create a method and software tool that gives the user an accurate representation of the risk to 3rd parties on the ground associated with a given flight plan. The main area of focus was on large rotorcraft and fixed-wing aircraft that are used by the military and that have the potential to do large amounts of damage if a crash were to occur. How unique types of failures affect the ground area at risk and the UA crash characteristics and how these characteristics affect population on the ground were all considered. With this information, a probability of fatality value is calculated, which helps the user determine if the mission risk is acceptable. The ability to optimize this flight path to find the lowest risk flight path is also possible, based upon user specifications.
Master of Science
Understanding the likelihood of an undesired event occurring is vital for the use of any system in the real world. This is especially true in the case of aircraft, were an undesired event can likely cause loss of life. A new area of aircraft that require additional insight into the failure characteristics are unmanned aerial systems, often referred to as drones. Drones do not have a pilot inside the aircraft, who could correct for any failures that might occur. Due to this potential inability to correct for a failure, a method must be developed to gain a better understanding of the potential failures and risks involved in drone operations. The method developed during this work was turned into a software tool, which allows a mission for a drone to be mapped out and the risk to be determined. Due to the drones being unmanned the risk is taken as the expected number of fatalities to the 3rd party individuals on the ground. This expected number of fatalities is determined by the population density of the area the flight is occurring over, and the crash characteristics for the aircraft. These methods and accompanying assumptions are outlined in the body of this work.

Gli stili APA, Harvard, Vancouver, ISO e altri

44

Riexinger, Luke E. "Residual Crashes and Injured Occupants with Lane Departure Prevention Systems". Diss., Virginia Tech, 2021. http://hdl.handle.net/10919/103060.

Testo completo

Abstract (sommario):

Every year, approximately 34,000 individuals are fatally injured in crashes on US roads [1]. These fatalities occur across many types of crash scenarios, each with its own causation factors. One way to prioritize research on a preventive technology is to compare the number of occupant fatalities relative to the total number of occupants involved in a crash scenario. Four crash modes are overrepresented among fatalities: single vehicle road departure crashes, control loss crashes, cross-centerline head-on crashes, and pedestrian/cyclist crashes [2]. Interestingly, three of these crash scenarios require the subject vehicle to depart from the initial lane of travel. Lane departure warning (LDW) systems track the vehicle lane position and can alert the driver through audible and haptic feedback before the vehicle crosses the lane line. Lane departure prevention (LDP) systems can perform an automatic steering maneuver to prevent the departure. Another method of prioritizing research is to determine factors common among the fatal crashes. In 2017, 30.4% of passenger vehicle crash fatalities involved a vehicle rollover [1]. Half of all fatal single vehicle road departure crashes resulted in a rollover yet only 12% of fatal multi-vehicle crashes involved a rollover [1]. These often occur after the driver has lost control of the vehicle and departed the road. Electronic stability control (ESC) can provide different braking to each wheel and allow the vehicle to maintain heading. While ESC is a promising technology, some rollover crashes still occur. Passive safety systems such as seat belts, side curtain airbags, and stronger roofs work to protect occupants during rollover crashes. Seat belts prevent occupants from moving inside the occupant compartment during the rollover and both seat belts and side curtain airbags can prevent occupants from being ejected from the vehicle. Stronger roofs ensure that the roof is not displaced during the rollover and the integrity of the occupant compartment is maintained to prevent occupant ejection. The focus of this dissertation is to evaluate the effectiveness of vehicle-based countermeasures, such as lane departure warning and electronic stability control, for preventing or mitigating single vehicle road departure crashes, cross-centerline head-on crashes, and single vehicle rollover crashes. This was accomplished by understanding how drivers respond to both road departure and cross-centerline events in real-world crashes. These driver models were used to simulate real crash scenarios with LDW/LDP systems to quantify their potential crash reduction. The residual crashes, which are not avoided with LDW/LDP systems or ESC, were analyzed to estimate the occupant injury outcome. For rollover crashes, a novel injury model was constructed that includes modern passive safety countermeasures such as seat belts, side curtain airbags, and stronger roofs. The results for road departure, head-on, and control loss rollover crashes were used to predict the number of crashes and injured occupants in the future. This work is important for identifying the residual crashes that require further research to reduce the number of injured crash occupants.
Doctor of Philosophy
Every year in the US, approximately 34,000 individuals are fatally injured in many different types of crashes. However, some crash types are more dangerous than other crash types. Drift-out-of-lane (DrOOL) road departure crashes, control loss road departure crashes, head-on crashes, and pedestrian crashes are more likely to result in an occupant fatality than other crash modes. In three of these more dangerous crash types, the vehicle departs from the lane before the crash occurs. Lane departure warning (LDW) systems can detect when the vehicle is about to cross the lane line and notify the driver with beeping or vibrating the steering wheel. A different system, called lane departure prevention (LDP), can provide automatic steering to prevent the vehicle from leaving the lane or return lane. In control loss crashes, the vehicle's motion is in a different direction than the vehicle's heading. During control loss, it is easier for the vehicle to roll over which is very dangerous. Electronic stability control (ESC) can prevent control loss by applying selective braking to each tire to keep the vehicle's motion in the same direction as the vehicle's heading. If a rollover still occurs, vehicles are equipped with passive safety systems and designs such as seat belts, side curtain airbags, and stronger roofs to protect the people inside. Seat belts can prevent occupants from striking the vehicle interior during the rollover and both seat belts and side curtain airbags can prevent occupants from being ejected from the vehicle. Stronger roofs ensure that the roof is not displaced during the rollover to prevent occupants from being ejected from the vehicle. The focus of this dissertation is to estimate how many crashes LDW, LDP, and ESC systems could prevent. This was accomplished by understanding how drivers respond after leaving their lane in real crashes. Then, these real crash scenarios were simulated with an LDW or LDP system to estimate how many crashes were prevented. The occupants of residual crashes, which were not prevented by the simulated systems, were analyzed to estimate the number of occupants with at least one moderate injury. Understanding which crashes and injuries that were not prevented with this technology can be used to decide where future research should occur to prevent more fatalities in road departure, head-on and control loss crashes.

Gli stili APA, Harvard, Vancouver, ISO e altri

45

Frank, Tara Elizabeth. "Why Do They Leave? The Departure of Student Affairs Professionals". Diss., Virginia Tech, 2013. http://hdl.handle.net/10919/19306.

Testo completo

Abstract (sommario):

Departure among student affairs administrators in higher education has been an issue for decades (Evans, 1988; Lorden, 1998; Tull, 2006). Rates of departure from student affairs within the first five years of experience are estimated at 50% to 60% (Holmes, Verrier, & Chisholm, 1983; Lorden, 1998; Tull, 2006). However, there is very little research that examines the reasons that student affairs professionals leave the field.
I conducted a qualitative study, using purposeful sampling, to determine what factors were most salient in new student affairs professionals\' departure. The conceptual framework was a modified version of Daly and Dee\'s (2006) model that described how psychological, structural, and environmental variables affect intent to stay with an organization. Participants included 24 former student affairs professionals who earned a master\'s degree in student affairs administration or a related field between 2004 and 2010 and who left the field between 2009 and 2011. Data were analyzed using a constant comparative method.
Findings suggest that new professionals depart student affairs for both Institutional and Individual reasons. Institutionally, professionals want to believe they are valued and supported, particularly by those in management positions. They want stable and supportive supervisors. They also seek stable organizational environments. Many feel they work too many hours for too little money and find few opportunities to advance. Individually, professionals seek a personal connection to their institution and job and leave the profession if those expectations are unmet. Additionally, some professionals find it difficult to obtain work/life balance. When they are left feeling unfulfilled in their jobs, they seek satisfaction outside of the field, pursuing other positions that more fully meet their wants and needs more. Future research could explore whether the rate of new student affairs professional departure is unusual when compared to other professions (e.g., teachers, social workers, nurses) or whether it is endemic to the student affairs profession.
Ph. D.

Gli stili APA, Harvard, Vancouver, ISO e altri

46

Ellzey, Delilah. "Ethnic-Racial Identity and Student Departure in African American Undergraduates". Kent State University / OhioLINK, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=kent162688965349327.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

47

Hawthorn, Ruth. "'Then came a departure' : writing loss in the Middle Generation". Thesis, University of Glasgow, 2012. http://theses.gla.ac.uk/3712/.

Testo completo

Abstract (sommario):

Building on recent studies of twentieth-century elegy, this thesis examines the re-working of elegiac tropes in the poetry of Delmore Schwartz, Randall Jarrell, John Berryman and Robert Lowell - four writers among the Middle Generation of American poets who share a persistent preoccupation with loss. As personal and national disappointments and bereavements are reflected in their distinctly elegiac poetics, their work overtly questions not only the possibility of finding consolation, but also the worth of their subject and the ability of language to express, with any conviction or accuracy, what has been lost. Highly conscious of the elegiac tradition, their work collectively distorts this genre, moulding it into a flexible mode which is more readily able to reflect the historical and cultural developments of the mid-twentieth century. Countering the still-prevalent view of these poets as “confessional” writers, this thesis’ focus on elegy challenges critics who have dismissed these four as solipsistic or narcissistic. Instead, they emerge as a group who were deeply invested in understanding their contemporary scene and whose most significant relationships were textual, rather than biographical. Their writing reveals an ongoing and serious engagement with one another’s work, as they built on each other’s poetic experiments. The thesis complicates the canonical divide which has entrenched these poets as the mainstream establishment, pitted against a more radical “postmodern” avant-garde, which includes the Beats, Black Mountain and the New York School. Through close textual analysis and an exploration of their links with Elizabeth Bishop, Schwartz, Jarrell, Berryman and Lowell are posited as poets whose engagement with the elegy has significantly altered the post-World War II poetic landscape.

Gli stili APA, Harvard, Vancouver, ISO e altri

48

Butalla, Martin William. "The departure of the restrainer in 2 Thessalonians 2:3". Theological Research Exchange Network (TREN), 1998. http://www.tren.com.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

49

Komma, Abishek. "Continuous departure-time choice models for home-to-work commute". [Gainesville, Fla.] : University of Florida, 2008. http://purl.fcla.edu/fcla/etd/UFE0022449.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

50

Mukhopadhyay, Mousumi. "Lane departure avoidance system". 2011. http://hdl.handle.net/1805/2628.

Testo completo

Abstract (sommario):

Indiana University-Purdue University Indianapolis (IUPUI)
Traffic accidents cause millions of injuries and tens of thousands of fatalities per year worldwide. This thesis briefly reviews different types of active safety systems designed to reduce the number of accidents. Focusing on lane departure, a leading cause of crashes involving fatalities, we examine a lane-keeping system proposed by Minoiu Enache et al.They proposed a switched linear feedback (LMI) controller and provided two switching laws, which limit driver torque and displacement of the front wheels from the center of the lane. In this thesis, a state feedback (LQR) controller has been designed. Also, a new switching logic has been proposed which is based on driver's torque, lateral offset of the vehicle from the center of the lane and relative yaw angle. The controller activates assistance torque when the driver is deemed inattentive. It is deactivated when the driver regains control. Matlab/Simulink modeling and simulation environment is used to verify the results of the controller. In comparison to the earlier switching strategies, the maximum values of the state variables lie very close to the set of bounds for normal driving zone. Also, analysis of the controller’s root locus shows an improvement in the damping factor, implying better system response.

Gli stili APA, Harvard, Vancouver, ISO e altri

Tesi sul tema "Departure"

Cita una fonte nei formati APA, MLA, Chicago, Harvard e in molti altri stili