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Posada, Mariño Pablo. "Location, location, location choice models". Thesis, Massachusetts Institute of Technology, 2015. http://hdl.handle.net/1721.1/99091.
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Thesis: M.C.P., Massachusetts Institute of Technology, Department of Urban Studies and Planning, 2015.Cataloged from PDF version of thesis.
Includes bibliographical references (pages 109-112).
Cities are, now more than ever before, the main centers of population and production. The growing demand for limited urban space is increasing urban complexity and magnifying both positive and negative externalities of urban agglomeration: increasing productivity, innovation, and social interaction, but also exacerbating living costs, pollution, inequality, congestion, etc. In order to build sustainable cities and have a net positive balance of urban externalities, we need to better understand the motivations of the different agents competing in the race for urban space. Location choice models can help to shine a light on these motivations by providing insights on agents' location preferences. They are also the building blocks of more comprehensive urban models and simulations that can help navigate urban complexity. This thesis explores location choice models for homeowner households and firms in Greater Boston. Specific research questions that these models can help answer include: How do residential location preferences vary with life cycles? What industries value clustering the most? These topics are important given (1) forecasted demographic changes, specifically the aging of the baby-boomers, and (2) the continuing move from a manufacturing-based economy to a service and knowledge-based economy. These changes in population and economy will likely require a change in housing stock in order to better match supply with demand, and changes in the stock of commercial space in order to continue boosting the firms that drive the economy of the region. The thesis also explores the data-related uncertainty of these models (how model estimation changes with different data sources) as well as their temporal transferability (how do preferences change over time). The location choice analysis for households suggests that income has a bigger impact on willingness to pay for location attributes than age of the head of the household or household size. The firm analysis indicates that firms in the professional service and health and education service sector place more value on proximity to jobs in the same industry and density than firms in other sectors. These preferences have strengthened over time. An in-depth analysis, such as the one presented in this thesis, of what city agents look for in a location can, and should, inform planning policies and intervention in order to better match location preferences with opportunities.
by Pablo Posada Mariño.
M.C.P.
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Lee, Sunshin. "Geo-Locating Tweets with Latent Location Information". Diss., Virginia Tech, 2017. http://hdl.handle.net/10919/75022.
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As part of our work on the NSF funded Integrated Digital Event Archiving and Library (IDEAL) project and the Global Event and Trend Archive Research (GETAR) project, we collected over 1.4 billion tweets using over 1,000 keywords, key phrases, mentions, or hashtags, starting from 2009. Since many tweets talk about events (with useful location information), such as natural disasters, emergencies, and accidents, it is important to geo-locate those tweets whenever possible.
Due to possible location ambiguity, finding a tweet's location often is challenging. Many distinct places have the same geoname, e.g., "Greenville" matches 50 different locations in the U.S.A. Frequently, in tweets, explicit location information, like geonames mentioned, is insufficient, because tweets are often brief and incomplete. They have a small fraction of the full location information of an event due to the 140 character limitation. Location indicative words (LIWs) may include latent location information, for example, "Water main break near White House" does not have any geonames but it is related to a location "1600 Pennsylvania Ave NW, Washington, DC 20500 USA" indicated by the key phrase 'White House'.
To disambiguate tweet locations, we first extracted geospatial named entities (geonames) and predicted implicit state (e.g., Virginia or California) information from entities using machine learning algorithms including Support Vector Machine (SVM), Naive Bayes (NB), and Random Forest (RF). Implicit state information helps reduce ambiguity. We also studied how location information of events is expressed in tweets and how latent location indicative information can help to geo-locate tweets. We then used a machine learning (ML) approach to predict the implicit state using geonames and LIWs.
We conducted experiments with tweets (e.g., about potholes), and found significant improvement in disambiguating tweet locations using a ML algorithm along with the Stanford NER. Adding state information predicted by our classifiers increased the possibility to find the state-level geo-location unambiguously by up to 80%. We also studied over 6 million tweets (3 mid-size and 2 big-size collections about water main breaks, sinkholes, potholes, car crashes, and car accidents), covering 17 months. We found that up to 91.1% of tweets have at least one type of location information (geo-coordinates or geonames), or LIWs. We also demonstrated that in most cases adding LIWs helps geo-locate tweets with less ambiguity using a geo-coding API. Finally, we conducted additional experiments with the five different tweet collections, and found significant improvement in disambiguating tweet locations using a ML approach with geonames and all LIWs that are present in tweet texts as features.Ph. D.
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Messer, A'ndrea Elyse Milner George R. "Small ancestral pueblo sites in the Mesa Verde region location, location, location /". [University Park, Pa.] : Pennsylvania State University, 2009. http://etda.libraries.psu.edu/theses/approved/WorldWideIndex/ETD-3773/index.html.
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Thangavelu, Balajee. "Single-Facility location problem among two-dimensional existing facility locations". Ohio University / OhioLINK, 2003. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1175283985.
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Saleem, Muhammad. "Location Analytics for Location-Based Social Networks". Doctoral thesis, Universite Libre de Bruxelles, 2018. https://dipot.ulb.ac.be/dspace/bitstream/2013/271131/5/contratMS.pdf.
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The popularity of location empowered devices such as GPS enabled smart-phones has immensely amplified the use of location-based services in social networks. This happened by allowing users to share Geo-tagged contents such as current locations/check-ins with their social network friends. These location-aware social networks are called Location-based Social Networks (LBSN), and examples include Foursquare and Gowalla. The data of LBSNs are being used for providing different kinds of services such as the recommendation of locations, friends, activities, and media contents, and the prediction of user's locations. To provide such services, different queries are utilized that exploit activity/check-in data of users. Usually, LBSN data is divided into two parts, a social graph that encapsulates the friendships of users and an activity graph that maintains the visit history of users at locations. Such a data separation is scalable enough for processing queries that directly utilize friendship information and visit history of users. These queries are called user and activity analytic queries. The visits of users at locations create relationships between those locations. Such relationships can be built on different features such as common visitors, geographical distance, and mutual location categories between them. The process of analysing such relationships for optimizing location-based services is termed Location Analytics. In location analytics, we expose the subjective nature of locations that can further be used for applications in the domain of prediction of visitors, traffic management, route planning, and targeted marketing.In this thesis, we provide a general LBSN data model which can support storage and processing of queries required for different applications, called location analytics queries. The LBSN data model we introduce, segregates the LBSN data into three graphs: the social graph, the activity graph, and the location graph. The location graph maintains the interactions of locations among each other. We define primitive queries for each of these graphs. In order to process an advanced query, we express it as a combination of these primitive queries and process them on corresponding graphs in parallel. We further provide a distributed data processing framework called GeoSocial-GraphX (GSG). GSG implements the aforementioned LBSN data model for efficient and scalable processing of the queries. We further exploit the location graph for providing novel location analytics queries in the domain of influence maximization and visitor prediction. We introduce a notion of location influence. Such influence can capture the interactions of locations based on their visitors and can be used for propagation of information between them. The applications of such a query lie in the domain of outdoor marketing, and simulation of virus and news propagation. We also provide a unified system IMaxer that can evaluate and compare different information propagation mechanisms. We further exploit the subjective nature of locations by analysing the mobility behaviour of their visitors. We use such information to predict the individual visitors as well as the groups of visitors (cohorts) in future for those locations. The prediction of visitors can be used for better event planning, traffic management, targeted marketing, and ride-sharing services.In order to evaluate the proposed frameworks and approaches, we utilize data from four real-life LBSNs: Foursquare, Brightkite, Gowalla, and Wee Places. The detailed LBSN data mining and statistically significant experimental evaluation results show the effectiveness, efficiency, and scalability of our proposed methods. Our proposed approaches can be employed in real systems for providing life-care services.Doctorat en Sciences de l'ingénieur et technologie
The portal is not showing my complete name. The name (my complete name), I want to have on the diploma is "Muhammad Aamir Saleem". Please correct this issue.
info:eu-repo/semantics/nonPublished
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McGinley, Susan. "Location, Location, Location: The Effect of Riparian Areas on Property Values in Tucson". College of Agriculture and Life Sciences, University of Arizona (Tucson, AZ), 2007. http://hdl.handle.net/10150/622138.
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Simkin, L. P. "The assessment of retail store locations : UK retailers' location practices and the development of a predictive retail store location performance model". Thesis, University of Bradford, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.372163.
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Öner, Özge. "Retail Location". Doctoral thesis, Internationella Handelshögskolan, Högskolan i Jönköping, IHH, Economics, Finance and Statistics, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:hj:diva-23753.
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The thesis in hand presents four individual chapters, all of which explore the spatial aspects of the retail sector. The theoretical framework used in all four papers is vastly rooted in the urban and regional economics literature. Using novel data from Sweden for the application of various econometric methods, the thesis investigates (i) the distance sensitivity of demand and market reach for various types of retail activities, (ii) the spatial composition of retail markets and co-location patterns between the various branches of the sector, (iii) the spatial determinants of independent retailers’ productivity, and (iv) the relationship between the retail sector and place attractiveness. The first paper (co-authored with Johan Klaesson) establishes a methodological framework for estimating distance decay and market accessibility for various types of retail activities given a lack of consumer data. The paper addresses the heterogeneous nature of the sector and provides a solid categorization for various types of retail activities. The second paper (coauthored with Johan P. Larsson) employs a unique empirical approach to characterize the location and co-location of retailers in the metropolitan markets. The analysis captures the co-location tendencies between various types of retailers at a highly disaggregated geographical level, where the importance of access to demand in the pertinent urban landscape is also accentuated. In the third paper, I investigate the spatial determinants of retail productivity. The focus of the paper is on the influence of market size and regional hierarchy on the productivity of independent retailers. The results show a higher productivity premium from the immediate market potential for stores located in central markets compared to stores located in non-central markets. On the other hand, regional market potential is found to play an equally important role for the productivity of stores located both in central and non-central markets. In the fourth paper, I address the role of retail as an urban amenity. In the empirical analysis, to capture the relevance of consumption possibilities for place attractiveness, “access to stores” measures are constructed for both the municipal and regional levels. Although consumption possibilities in the region are found to be positively associated with the place attractiveness of both rural and city municipalities, store access in municipal market boundaries is found to be relevant only for the place attractiveness of city municipalities.
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Poetranto, Groß Dwi Retnani. "Network flow and location (FlowLoc) : the source location problem /". München : Verl. Dr. Hut, 2009. http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&doc_number=017179775&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA.
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Poetranto, Gross Dwi Retnani. "Network flow and location (FlowLoc) the source location problem". München Verl. Dr. Hut, 2008. http://d-nb.info/992662664/04.
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Houshmand, Mozafari Dena. "Providing Location Privacy for the Users of Location-based Services". Thesis, Uppsala universitet, Institutionen för informationsteknologi, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-182167.
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Location-based services (LBS) are becoming more popular due to the growing usage of smartphones. They serve their users with various location-based services by having access to their location information. Privacy of users is in danger if their exact location data is exposed over time since their mobility patterns and their usual visiting spots such as their homes or work places can be revealed in the long term. Some mechanisms are proposed to protect user's location privacy and one of the most common ones is K-anonymity. In this mechanism, K different user's location information who are around the same area are changed to a common value which make them indistinguishable from each other's. The privacy level that is provided by this mechanism is usually measured by its metric named K-anonymity metric. Reza Shokri et al.[36] questions the effectiveness of K-anonymity metric in reflecting the real location privacy provided by K-anonymity mechanism in presence of different adversaries. In this thesis, we have studied different mechanisms which provide location privacy, implemented a new version of K-anonymity which emphasizes on more privacy and measured the effect of number of requests and number of users on the location privacy by using Distortion-based metric, which is a novel metric proposed by Reza Shokri et al.[35] and they believe it covers all the shortcomings of the previously proposed metrics. We have, as well, analysed and studied the application of this novel metric in some real-world scenarios.
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Farber, Leora Naomi. "Representation of displacement in the exhibition Dis-Location/Re-Location". Thesis, University of Pretoria, 2012. http://hdl.handle.net/2263/23070.
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Identity always presupposes a sense of location and a relationship with others and the representation of identity most often occurs precisely at the point when there has been a displacement (Bhabha cited in Papastergiadis 1995:17, emphasis added). In this study I focus on the condition of displacement, placing emphasis on the disjunctures of identity arising from temporal and physical dislocations and relocations in historical and postapartheid South African contexts. Displacement, and the attendant senses of dislocation and alienation it may evoke, is explored with reference to three selected female personae. For each persona, displacement is shown to provoke transmutations in subjectivity and identity, resulting in disjunctive identities and relationships with place. Their individual narratives raise questions around the consequences of displacement for a sense of (un)belonging and the (re)making of identities across geographical, cultural, temporal, ethnic and environmental borders. The pivotal role displacement plays in the processes of formation and transformation of subjectivity and identity is foregrounded. Familial histories of diasporic displacement, together with colonial legacies that have shaped my subject position as a white, middle-class, female South African woman, are interlaced with a recounting of personal experience of displacement in postapartheid South Africa. This personal sense of displacement, experienced between the years 2000 to 2006, is extended to a discussion on what is argued to be collective forms of white, English-speaking South Africans’ dislocation during the same time period. I suggest that their sense of displacement was experienced in relation to the uncertainty of their subject positions in postapartheid South Africa. In the practical and theoretical components of the degree, I consider how the three personae’s subjectivities are practiced and lived from their different space-time continuums. This exploration prompts further questions around how the effects of displacement on subjectivity and new identity formations are contingent upon each persona’s relation to the Other of colonial discourse, or the other-strangerforeigner within. Although there are marked differences between their colonial, diasporic and postcolonial contexts, a central theme that underpins the study is that the three conditions of displacement are linked by disjunctures arising from processes of dislocation, alienation, relocation and adaptation. Each persona’s epistemological reality is shown to comprise multiple ambivalences and ambiguities, and is marked by processes of cultural contestation and inner conflict. Their ambivalences and ambiguities encompass slippages between positions of inclusion and exclusion; insider and outsider; inhabitant and immigrant; alienation and belonging; placelessness and locatedness; homely and unhomely that the experience of uprooting and relocating foregrounds. While displacement is understood in terms of trauma and conflict, this condition is also regarded as a generative space of possibility for the emergence of new identity formations. Using my experiences of self-transformation and renegotiation of my identity through processes of cultural contact and exchange as a departure point, I consider ways in which collective white, English-speaking South Africans’ cultural identities are being reformulated, renegotiated or ‘hybridised’ in postapartheid South Africa as a transforming, postcolonial society.Thesis (DPhil)--University of Pretoria, 2012.
Visual Arts
unrestricted
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Knezev, Maja. "Optimal fault location". [College Station, Tex. : Texas A&M University, 2007. http://hdl.handle.net/1969.1/ETD-TAMU-2061.
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Kent, Eamonn. "Distributed fault location". Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp01/MQ30715.pdf.
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Lass, Jennifer Miriam. "Location and menstruation". Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape11/PQDD_0025/MQ40682.pdf.
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Höckerfelt, Niclas. "Location of cables". Thesis, Linköpings universitet, Institutionen för teknik och naturvetenskap, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-96292.
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Building- and electric projects are controlled by different standards and regulations. In the past years has the standards and regulation been change on the electric field. The changing has result in new possibilities and problems. According to the present “Swedish standards” it’s not allowed to put cables in more than one layer on cable ladders. However it’s not unusual that cables are been put in more than one layer, particularly in old establishments. If performances differs from “Swedish standard” are chosen, the responsibility party have to supply documentation for the chosen performance. In the rapport “Swedish standards” and regulations from “Swedish Electric Authority” are analysed to investigate what possibilities concerning putting cables in more than one layer.All byggnations- och installationsverksamhet styrs av olika normer, föreskrifter och standarder. Inom elområdet har struktur och dokumentation för föreskrifter och standardisering ändrats de senaste åren. Därmed har nya möjligheter och problem uppstått. I ”svensk standard” finns det inga rekommendationer för att förlägga installations- och kraftkabel i mer än ett lager, vid förläggning på kabelstege. Dock är det inte helt ovanligt att kabel idag förläggs i flera lager, detta förekommer framförallt i äldre anläggningar. I och med att det ibland väljs utföranden som inte överrensstämmer med ”svensk standard” blir den utförande parten, enligt elsäkerhetsföreskrifterna, skyldig att tillhanda hålla dokumentation som beskriver det valda utförandet. I rapporten analyseras elsäkerhetsföreskrifterna från Elsäkerhetsverket och ”svensk standard” från Svenska Elektriska Kommissionen, SEK, för att ta reda på vad som är möjligt gällande kabelförläggning. För att kunna styrka de slutsatser som dragits genom bearbetning av olika publikationer gjordes även mätningar med termografering. Slutligen presenteras rekommendationer och slutsatser kring hur kabelförläggning och dimensionering bör utföras.
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Eckerström, Johan. "Location Aware Communication". Thesis, KTH, Mikroelektronik och Informationsteknik, IMIT, 2003. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-93110.
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Automotive telematic systems will be as common in future cars as ABS and airbags are in current cars. These systems will provide services such as navigation aid, automatic emergency alerts, traffic and road information, information about parking possibilities, tourist information, and personalized news. All these services need a communication link to the mobile Internet to be able to work properly. In this master’s thesis General Packet Radio Service, GPRS will be investigated and evaluated as a bearer for these kinds of services. A test application was built to test the location aware communication on the field. Upstream and downstream delays, possible bottlenecks in the network, connection set-up time, characteristics of different operators, and connection breakdowns where analyzed. The tests showed high network delays, and that many connection breakdowns occurred. The operators did not differ much when it comes to performance. One mayor drawback with GPRS is the low scalability with respect to operator’s lack of IP addresses, which will be discussed. Conclusions of the evaluation were that only certain location-based services are suitable over GPRS with the quality of today.
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Hazas, Michael David. "Indoor location systems". Thesis, University of Cambridge, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.619529.
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Sharma, Seema. "Location Based Authentication". ScholarWorks@UNO, 2005. http://scholarworks.uno.edu/td/141.
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With the growth of wireless technologies in sectors like the military, aviation, etc, there is a need to determine the authenticity of a genuine user. Today's conventional authentication mechanisms are based on three factors: knowledge, possession and biometrics. These factors are prone to theft, hardware failure, expensive, etc. Consequently, there is a need of a stronger solution. One such solution is Location Based Authentication that considers the location information of a user. The location information is time based and thus hard to steal. However, accuracy of the GPS, signal strength inside the building, etc, affects its potential. Consequently, there is a need to address alternatives. One such alternative is to implement a puzzle-based authentication scheme based on the location information. In the proposed scheme, the server asks dynamic location-based questions and the client answers them based on the proposed route of travel. This scheme strengthens the current authentication mechanisms.
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Albuquerque, Daniel Filipe. "Ultrasonic location system". Doctoral thesis, Universidade de Aveiro, 2013. http://hdl.handle.net/10773/11508.
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Doutoramento em Engenharia ElectrotécnicaEsta tese apresenta um sistema de localização baseado exclusivamente em ultrassons, não necessitando de recorrer a qualquer outra tecnologia. Este sistema de localização foi concebido para poder operar em ambientes onde qualquer outra tecnologia não pode ser utilizada ou o seu uso está condicionado, como são exemplo aplicações subaquáticas ou ambientes hospitalares. O sistema de localização proposto faz uso de uma rede de faróis fixos permitindo que estações móveis se localizem. Devido à necessidade de transmissão de dados e medição de distâncias foi desenvolvido um pulso de ultrassons robusto a ecos que permite realizar ambas as tarefas com sucesso. O sistema de localização permite que as estações móveis se localizem escutando apenas a informação em pulsos de ultrassons enviados pelos faróis usando para tal um algoritmo baseado em diferenças de tempo de chegada. Desta forma a privacidade dos utilizadores é garantida e o sistema torna-se completamente independente do número de utilizadores. Por forma a facilitar a implementação da rede de faróis apenas será necessário determinar manualmente a posição de alguns dos faróis, designados por faróis âncora. Estes irão permitir que os restantes faróis, completamente autónomos, se possam localizar através de um algoritmo iterativo de localização baseado na minimização de uma função de custo. Para que este sistema possa funcionar como previsto será necessário que os faróis possam sincronizar os seus relógios e medir a distância entre eles. Para tal, esta tese propõe um protocolo de sincronização de relógio que permite também obter as medidas de distância entre os faróis trocando somente três mensagens de ultrassons. Adicionalmente, o sistema de localização permite que faróis danificados possam ser substituídos sem comprometer a operabilidade da rede reduzindo a complexidade na manutenção. Para além do mencionado, foi igualmente implementado um simulador de ultrassons para ambientes fechados, o qual provou ser bastante preciso e uma ferramenta de elevado valor para simular o comportamento do sistema de localização sobre condições controladas.
This thesis presents a location system based exclusively on ultrasonic signals, without using any other technology. This location system was designed to operate in environments where the use of other technologies is not possible or the use of them is limited, such as underwater applications or hospital environments. The proposed location system uses a network of fixed beacons allowing the mobile stations to locate. Due to the necessity of data transmission and distance measurement an ultrasonic pulse robust to echoes was developed that allows to perform both tasks with success. The location system allows that mobiles locate themselves only listening to the information in the ultrasonic pulse sent by the beacons, for that an algorithm based on time difference of arrival is used. Therefore, the user privacy is guaranteed as well as the complete independence of the system number of users. To simplify the network implementation it is only necessary to manually define the position of some of the beacons, called anchor beacons. These will allow the remaining autonomous beacons to locate themselves by an iterative location algorithm based on a local cost function minimization. For this system to work properly the beacons must synchronize their clocks and measure the distance between them. Therefore, this thesis proposes a clock synchronization protocol which also allows to measure the distance between the beacons by exchanging only three ultrasonic messages. Additionally, the location system permits that damaged beacons may be replaced without compromising the network operability reducing the maintenance complexity. Additionally, a simplified ultrasonic simulator for indoor environments was developed, which has proved to be very accurate and a valuable tool to simulate the location system behavior under controlled conditions.
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Hightower, Jeffrey. "The location stack /". Thesis, Connect to this title online; UW restricted, 2004. http://hdl.handle.net/1773/6917.
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Mankins, Matthew William David 1975. "Location linked information". Thesis, Massachusetts Institute of Technology, 2003. http://hdl.handle.net/1721.1/62043.
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Thesis (S.M.)--Massachusetts Institute of Technology, School of Architecture and Planning, Program in Media Arts and Sciences, 2003.Pages 98 and 99 blank.
Includes bibliographical references (p. 75-81).
This work builds an infrastructure called Location Linked Information that offers a means to associate digital information with public, physical places. This connection creates a hybrid virtual/physical space, called glean space, that is owned, managed, and rated by the public, for the benefit of the populace. Initially embodied by an interactive, dynamic map viewed on a handheld computer, the system provides two functions for its urban users: 1) the retrieval of information about their surroundings, and 2) the optional annotation of location for communal benefit. Having the ability to link physical location with arbitrary information is an essential function to building immersive information environments and the smart city. Public computing systems such as Location Linked Information will enhance the urban experience, just as access to transportation dramatically altered the sensation and form of the city.
by Matthew William David Mankins.
S.M.
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Bamba, Bhuvan. "Scaling location-based services with location privacy constraints: architecture and algorithms". Diss., Georgia Institute of Technology, 2010. http://hdl.handle.net/1853/34693.
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Advances in sensing and positioning technology, fueled by wide deployment of wireless networks, have made many devices location-aware. These emerging technologies have enabled a new class of applications, known as Location-Based Services (LBS), offering both new business opportunities and a wide array of new quality of life enhancing
services. One example of such services is spatial alarms, an enabling technology for location-based advertisement, location-based alerts or reminders and a host of other applications. On the other hand, the ability to locate mobile users accurately also opens door for new threats - the intrusion of location privacy. The time series of location data can be linked to personal identity, which leads to unauthorized information exposure about the individual's medical conditions, alternative lifestyles, unpopular political views or location-based spam and stalking. Thus, there are two important challenges for location-based service provisioning. How do we scale LBSs in the presence of client mobility and location dependent
constraints for the multitude of new, upcoming location-based applications under a common framework? How do we provide anonymous location- based services with acceptable performance and quantifiable privacy protection in the next generation of mobile networks, systems and applications? This dissertation delivers technical solutions to address these important challenges.
First, we introduce spatial alarms as the basic primitive to represent a class of locationbased
services that require location-based trigger capability. Similar to time-based alarms, spatial alarms serve as spatial event reminders that enable us to express different location-based information needs supported by a variety of applications ranging from location-based advertisements, location-based personal assistants, to friend locator services like Google Latitude. We develop a generalized framework and a suite of optimization techniques for server-centric scalable processing of spatial alarms. Our architecture and algorithm development provide significant performance enhancement in terms of system scalability compared to naive spatial alarm processing techniques, while maintaining high accuracy for spatial alarm processing on the server side and reduced communication costs and energy consumption on the client side. Concretely, we develop safe period optimizations for alarm
processing and introduce spatial alarm grouping techniques to further reduce the unnecessary
safe period computation costs. In addition, we introduce a distributed alarm processing architecture that advocates the partitioning of the alarm processing load among the server and the relevant mobile clients to reduce the server load and minimize the client-to-server communication cost through intelligent distribution and parallelization. We also explore a variety of optimization opportunities such as incorporating non-spatial constraints into the location-based information monitoring problem and utilizing efficient indexing methods such as bitmap indexing to further enhance the performance and scalability of spatial alarm processing in the presence of mobility hotspots and skewed spatial alarm distributions.
Second, we develop the PrivacyGrid framework for privacy-enhanced location service provisioning, focusing on providing customizable and personalized location privacy solutions while scaling the mobile systems and services to a large number of mobile users and a large number of service requests. The PrivacyGrid approach has three unique characteristics. First, we develop a three-tier architecture for scaling anonymous information delivery in a mobile environment while preserving customizable location privacy. Second,
we develop a suite of fast, dynamic location cloaking algorithms. It is known that incorporation of privacy protection measures may lead to an inherent conflict between the level of privacy and the quality of services (QoS) provided by the location-based services. Our location cloaking algorithms can scale to higher levels of location anonymity while achieving a good balance between location privacy and QoS. Last but not the least; we develop two types of location anonymization models under the PrivacyGrid architecture, one provides the random way point mobility model based location cloaking solution, and the other provides a road network-based location privacy model powered by both location k-anonymity and segment s-anonymity. A set of graph-based location cloaking algorithms are developed, under the MobiCloak approach, to provide desired levels of privacy protection for users traveling on a road network through scalable processing of anonymous location services.
This dissertation, to the best of our knowledge, is the first one that presents a systematic approach to the design and development of the spatial alarm processing framework and various optimization techniques. The concept of spatial alarms and the scaling techniques developed in this dissertation can serve as building blocks for many existing and emerging location-based and presence based information and computing services and applications. The second unique contribution made in this dissertation is its development of the PrivacyGrid architecture for scaling anonymous location based services under the random waypoint mobility model and its extension of the PrivacyGrid architecture through introducing the MobiCloak road-network based location cloaking algorithms with reciprocity support for spatially constrained network mobility model. Another unique feature of the PrivacyGrid and MobiCloak development is its ability to protect location privacy of mobile users while maintaining the end-to-end QoS for location-based service provisioning in the presence of dynamic and personalized privacy constraints.
24
Ito, Seigo, i Nobuo Kawaguchi. "Orientation-Location Estimation And Orientation-Location Based Service Using Wireless LAN". INTELLIGENT MEDIA INTEGRATION NAGOYA UNIVERSITY / COE, 2005. http://hdl.handle.net/2237/10454.
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Xu, Ge (Toby). "Exploring historical location data for anonymity preservation in location-based services". [Ames, Iowa : Iowa State University], 2007.
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Wang, Chen. "Location based services and location based behavior in a smart city". Thesis, Lyon, 2016. http://www.theses.fr/2016LYSEC017/document.
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Le concept de ”Smart Cities” a émergé au cours des dernières années pour décrire comment les investissements dans le capital humain et social, et dans les technologies de la communication (TIC) infrastructures et services électroniques peuvent maintenir la croissance durable et la qualité de vie, par une gestion judicieuse des ressources naturelles et par un gouvernement participatif. Pour nous, Smart City est un environnement réel augmenté permettant l’informatique ubiquitaire, avec web 2.0, qui est collaborative, mobile et contextuelle, les acteurs humains, ainsi que des objets connectés faisant désormais partie intégrante de l’Internet. Dans le contexte de notre projet international France-Chine sur Smart City, nous avons utilisé une approche MOCOCO (Mobilité, Contextualisation, Collaboration) à mener des travaux de recherche avec de multiples applications dans des situations de travail professionnels et à domicile, des situations d’apprentissage mobile contextuelles, ainsi que des applications de Smart City sont prises en compte - le transport, la distribution des marchandises, et des activités sportives et culturelles. Cette thèse se concentre sur les services basés sur la localisation (LBS), et Internet des Objets (IdO), qui sont deux aspects importants de Smart City. Le choix de la Gestion Dynamique des Voies de Circulation comme une étude de cas dans cette thèse est également une bonne pratique d’intégration de nouvelles technologies pour rendre la ville plus intelligente et pour rendre notre vie plus confortable. Selon Schiller et Voisard (2004), les services basés sur la localisation peuvent ˆêtre définis comme des services qui intègrent l’emplacement ou la position d’un dispositif mobile avec d’autres informations afin de fournir une valeur ajoutée à un utilisateur. L’objectif est d’utiliser la mise en œuvre IdO pour améliorer LBS, fournissant l’intelligence ambiante et d’assurer la facilité d’utilisation pour usagers dans des situations dynamiques. L’aspect théorique de nos contributions est que nous examinons la possibilité et la faisabilité de l’utilisation de l’IdO pour augmenter LBS. L’architecture de l’IdO a une capacité d’intégrer divers objets, ce qui fournit à LBS une meilleure gestion des dispositifs de géolocalisation; l’intergiciel de l’IdO, capable de faire l’abstraction des objets et la composition de services, donne la possibilité de déployer des composants de service plus intelligents et personnalisés, ainsi peut améliorer l’intergiciel de LBS. L’aspect pratique de nos contributions est que nous avons choisi une problématique de gestion dynamique des voies comme une étude de cas, validant notre approche d’utiliser l’IdO pour augmenter LBS dans une application de Smart City. L’objectif du système de gestion dynamique des voies est d’assurer une meilleure utilisation de voie de circulation par l’allocation dynamique de voies à différents types de transport. Nous avons fourni l’architecture du système du point de vue de TIC, et un environnement de simulation pour valider la conception de la solution. Nous avons également développé une preuve de concept pour valider les aspects technologiques du système. L’environnement de simulation comprend un simulateur pour simuler la fonction du système et les comportements des véhicules, un éditeur de scénario, et un générateur de trafic en tant qu’outils d’initialisation. Différentes formes de visualisation de résultats de simulation sont également prises en compte. En outre, nous avons développé un outil d’évaluation basé sur la visualisation en 3D, qui permet l’interaction entre l’utilisateur et l’outil en temps réel, pour effectuer des tests d’utilisation comme l’étude des aspects IHM, puisque les facteurs humains devraient toujours être mis en premiers dans le contexte de Smart City. [...]The concept of “Smart Cities” has emerged during the last few years to describe how investments in human and social capital and modern Information and Communication Technologies (ICT) infrastructure and e-services fuel sustainable growth and quality of life, enabled by a wise management of natural resources and through participative government. To us, Smart City is a real augmented environment allowing ubiquitous computing, with up-to-date web 2.0, which is collaborative, mobile and contextual, human actors as well as different things (connected objects) are now an integral part of internet. In the international France-China project on Smart City we used the MOCOCO approach (Mobility, Contextualization, Collaboration) to conduct research work with multiple applications in working, learning and social situations; professional and home working situations, professional and teenager contextual mobile learning situations as well as Smart City applications are taken into account – transportation, goods distribution and local sport and cultural activities. This dissertation focuses on Location Based Services, and Internet of Things, which are both important aspects of Smart City. The choice of dynamic management of road lanes as a case study in this thesis, is also a good practice of integrating new technologies to make the city smarter and to make our life more comfortable. According to Schiller and Voisard (2004), Location Based Services (LBS) can be defined as services that integrate a mobile device’s location or position with other information so as to provide added value to a user. During recent years, LBS has evolved from simple GIS applications and positioning of emergent phone callers to more complicated, proactive, application-oriented services adapted to different users. However, heterogeneity of devices, data management and analysis, and HCI aspects are always main challenges for LBS. Our goal is to make the LBS meet the requirements of Smart City, with use of Internet of Things (IoT), integrating a certain degree of ambient intelligence. The theoretical aspect of our contributions is that we examine at component level the possibility and feasibility of using IoT to better support LBS. The ability of IoT architecture of integrating various objects gives LBS a better management of location-aware devices; the sensors can also enrich the data source of LBS. The middleware of IoT, good at objects abstraction and service composition, provides possibilities to deploy more intelligent and customized service components, thus can enhance the middleware of LBS. The practical aspect of our contributions is that we choose a dynamic lane management problem as a use case study demonstrating our approach in regard to combining LBS with IoT for a Smart City application. The goal of the dynamic lane management system is to make a better use of road lanes by dynamic allocation of lanes to different types of transportation. We provide the system architecture, user interfaces and a simulation environment to validate the solution design. We also develop a proof of concept to validate the technological aspects of the lane management system. The simulation environment of the lane management system is another important part of our contributions, it includes a core simulator to simulate the function of the system and the behaviors of the vehicles, and an editor of scenario and a generator of traffic as initialization tools. Different visualization methods of simulation results are also taken into consideration. In addition, we develop an evaluation tool which allows for real time user interaction, based on the visualization of the results of the simulator to conduct user tests for HCI aspects, as human factors should always be considered in the context of Smart City. [...]
27
Pozzobon, Oscar. "Secure location services : vulnerability analysis and provision of security in location systems /". [St. Lucia, Qld.], 2004. http://www.library.uq.edu.au/pdfserve.php?image=thesisabs/absthe18315.pdf.
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Asimenu, Ernest. "FDI location characteristics of MNEs location decisions in the Ghanaian banking sector". Thesis, Brunel University, 2013. http://bura.brunel.ac.uk/handle/2438/13046.
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Foreign Direct Investment (FDI) is a significant source of capital for economic growth in developing countries. The increasing financial links across countries, especially between industrial and developing countries have been associated with the liberalization of international financial markets. Moreover, globalization in production, due to technological innovations in communications and transport coupled with better policies in developing countries, are often considered to be the primary forces that drove globalization and foreign direct investment in the 1990s and recent times. The literature on FDI can be categorised into three main groups: the first group investigates the effect of FDI on macroeconomic indicators, such as economic growth, exchange rate, rate of inflation, balance of payments, and rate of unemployment. The second group examines the impact of FDI on different factors such as technology transfer to recipient countries, management practices by national firms, and labour skill and productivities in hosting countries. The third group focuses on the characteristics of FDI and the driving forces for its inflows and outflows to different countries. This research focuses on the latter strand thereby enabling an investigation of the location characteristics of MNEs location decision in the banking sector. The main aim of this thesis is to examine and analyse FDI location characteristics in the Ghanaian banking sector. This has been achieved by making use of both qualitative and quantitative data series’ to ascertain whether the major location factors are the characteristics/determinants of MNEs location decision in relation to a specific industry (banking) and a specific country (Ghana). Using a multimethod approach, the findings of this thesis reveal that political and legal factors are very significant, followed by macroeconomic policy factors and infrastructure factors. Market factors and labour market factors which have been found in previous studies (Lall 2001; Asiedu; 2003; Dunning 2004; Helpman; 2006 and Felbermayr et al. 2011) to be important determinants of FDI inflows have been found in this thesis to be the least important factors for MNEs’ location decision in relation to FDI inflows to Ghana.
29
Lu, Zhenxin, i 蘆振鑫. "Location-aware routing with reduced location maintenance routing for Ad hoc networks". Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2004. http://hub.hku.hk/bib/B29737308.
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Al-Loughani, Intesar Mansour. "Algorithmic Approaches for Solving the Euclidean Distance Location and Location-Allocation Problems". Diss., Virginia Tech, 1997. http://hdl.handle.net/10919/30694.
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This dissertation is concerned with the development of algorithmic approaches for solving
the minisum location and location-allocation problems in which the Euclidean metric is
used to measure distances. To overcome the nondifferentiability difficulty associated with
the Euclidean norm function, specialized solution procedures are developed for both the
location and the location-allocation problems. For the multifacility location problem
(EMFLP), two equivalent convex differentiable reformulations are proposed. The first of
these is formulated directly in the primal space, and relationships between its Karush-Kuhn-
Tucker (KKT) conditions and the necessary and sufficient optimality conditions for
EMFLP are established in order to explore the use of standard convex differentiable
nonlinear programming algorithms that are guaranteed to converge to KKT solutions. The
second equivalent differentiable formulation is derived via a Lagrangian dual approach
based on the optimum of a linear function over a unit ball (circle). For this dual approach,
which recovers Francis and Cabot's (1972) dual problem, we also characterize the
recovery of primal location decisions, hence settling an issue that has remained open since
1972. In another approach for solving EMFLP, conjugate or deflected subgradient based
algorithms along with suitable line-search strategies are proposed. The subgradient
deflection method considered is the Average Direction Strategy (ADS) imbedded within
the Variable Target Value Method (VTVM). The generation of two types of subgradients
that are employed in conjunction with ADS are investigated. The first type is a simple
valid subgradient that assigns zero components corresponding to the nondifferentiable
terms in the objective function. The second type expends more effort to derive a low-norm
member of the subdifferential in order to enhance the prospect of obtaining a descent
direction. Furthermore, a Newton-based line-search is also designed and implemented in
order to enhance the convergence behavior of the developed algorithm. Various
combinations of the above strategies are composed and evaluated on a set of test
problems. Computational results for all the proposed algorithmic approaches are
presented, using a set of test problems that include some standard problems from the
literature. These results exhibit the relative advantages of employing the new proposed
procedures.
Finally, we study the capacitated Euclidean distance location-allocation problem. There
exists no global optimization algorithm that has been developed and tested for this class of
problems, aside from a total enumeration approach. We develop a branch-and-bound
algorithm that implicitly/partially enumerates the vertices of the feasible region of the
transportation constraints in order to determine a global optimum for this nonconvex
problem. For deriving lower bounds on node subproblems, a specialized variant of the
Reformulation-Linearization Technique (RLT) is suitably designed which transforms the
representation of this nonconvex problem from the original defining space into a higher
dimensional space associated with a lower bounding (largely linear) convex program. The
maximum of the RLT relaxation based lower bound that is obtained via a deflected
subgradient strategy applied to a Lagrangian dual formulation of this problem, and another
readily computed lower bound in the projected location space is considered at each node
of the branch-and-bound tree for fathoming purposes. In addition, certain cut-set
inequalities in the allocation space, and objective function based cuts in the location space
are generated to further tighten the lower bounding relaxation. Computational experience
is provided on a set of randomly generated test problems to investigate both the RLT-based
and the projected location- space lower bounding schemes. The results indicate that
the proposed global optimization approach for this class of problem offers a promising
viable solution procedure. In fact, for two instances available available in the in the
literature, we report significantly improved solutions. The dissertation concludes with
recommendations for further research for this challenging class of problems. Data for the
collection of test problems is provided in the Appendix to facilitate further testing in this
area.Ph. D.
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Götzinger, Markus [Verfasser], i Dirk [Akademischer Betreuer] Neumann. "Facility location planning for distribution networks and infrastructure locations = Standortplanung für Distributionsnetzwerke und Infrastruktureinrichtungen". Freiburg : Universität, 2014. http://d-nb.info/112347866X/34.
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Barutcuoglu, Aras. "Multiobjective Hub Location Problem". Master's thesis, METU, 2009. http://etd.lib.metu.edu.tr/upload/3/12610817/index.pdf.
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In this study, we propose a two-phase solution approach for approximating the efficient frontier of a bicriteria hub location problem. We develop an evolutionary algorithm to locate the hubs on the network as the first phase. In the second phase, we develop a bounding procedure based on dominance relations and using the determined bounds, we solve the allocation subproblem for each located hub set. The two-phase approach is tested on the Australian Post data set and it is observed that our approach approximates the entire efficient frontier well. In addition, we suggest an interactive procedure to find the solutions that are in the decision maker&rsquos preferred region of the solution space. In this procedure, we progressively incorporate the preferences of the decision maker and direct the search towards the preferred regions. Based on some computational experiments, it is observed that the interactive procedure converges to the preferred regions.
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Charvandeh, Jenny. "Location aware web access". Thesis, KTH, Kommunikationssystem, CoS, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-91492.
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The user's mobile communication device has an increasing sense of where the user is. This location information may be very fine grained or very coarse. Given some amount of location information it is possible to create location aware services. This thesis presents and evaluates a system for location aware web browsing. Indoors the user can click on a point on a map (to establish a virtual location using a previously installed user application), outdoors the location can be provided by GPS, or the location might be provided by some other location system (indoors or outdoors), then each HTTP GET request for a URL will be augmented with information about the user's location or their virtual location. Subsequently a web query is created. Then the location information encoded as longitude and latitude is appended to this web query. The web server uses this location information to generate dynamically location aware web pages. Finally a web browser shows the web pages.Tillgång till information varsomhelst och vilken tid som helst är en viktig utkom av modern rörliga kommunikations systems. Alltmera har användarens terminal kännedom om användarens plats. Informationen om platsen kan vara lite eller omfattande. Tillgång till information om platsen gör det möjligt att skapa platsmedvetna tjänster. I den här master thesis presenterar och utvärderar jag ett system för plats medvetna web användning. Användaren klickar på en punkt på en karta (för att inrätta en virtuell lokalisering genom att använda tidigare installerat applikationer), sedan deras HTTP GET request för en URL utvidgas med information om användarens position eller deras virtuella (verkliga) lokalisering. En platsmedveten web query har skapats så att information om plats som latitude och longitude läggs till denna web query. Sedan en web server använder denna information för att generera dynamiska web sidor.
34
Bischoff, Martin. "Location of connection facilities /". Aachen : Shaker, 2008. http://d-nb.info/988141434/04.
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Sakarya, Fatma Ayhan. "Passive source location estimation". Diss., Georgia Institute of Technology, 1992. http://hdl.handle.net/1853/13714.
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ZAMPIER, HERBERT DE VASCONCELOS. "MOBILE LOCATION HYPERBOLICS SYSTEMS". PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2003. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=3378@1.
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COORDENAÇÃO DE APERFEIÇOAMENTO DO PESSOAL DE ENSINO SUPERIORPor anos, o tema da localização de terminais móveis são estudados. Inicialmente de caráter militar, tais estudos já são de grande interesse da sociedade civil. Com o crescimento explosivo do tráfego gerado pelo uso da telefonia móvel, os sistemas de localização tornam-se um forte chamariz de renda das empresas de telefonia móvel. Vários podem ser os serviços baseados em localização, entretanto, dentre eles, os chamados serviços de emergência, tem sido fonte de grande debate internacional. Isto porque, na década passada,os Estados Unidos, através de seu órgão regulador, fixou prazos para que operadoras de telefonia móvel naquele país fossem capazes de obter, com uma certa precisão, a localização de chamadas de emergência, o chamado E911. Contudo, para tal, existem vários modos e técnicas de obtenção da localização, das quais destacam-se as técnicas baseadas em diferença de tempos de chegada, do inglês Time Diference of Arrival - TDoA-. Técnicas estas baseadas na solução de equações hiperbólicas para ofertarem a localização de uma dada estação móvel. Daí, sistemas baseados em TDoA serem também chamados de Sistemas Hiperbólicos. Apegando-se a tais fatos, este estudo explora o tema no intuito de implementar um novo método para a solução de sistemas hiperbólicos de localização. Tal método é caracterizado pela otimização nas medidas de diferenças de tempos de chegada estimadas pelo sistema, que através desta otimização fornecem a localização da estação móvel com uma considerável precisão.
The issue about Mobile Location Systems have been studied for a long time.At first, it was circumscribed to the militar area, but nowadays it has been spread along civil society needs. Due to the boom of the cellular mobile technology, location system may become necessary for the cellular mobile company. Location based services may vary. However, the emergency calls service have been discussed by international companies. This has happened because, last decade, the United States has obliged the wireless carriers to locate accurately emergency calls accurately, called E911. But, for this do happen, there are several ways and techniques to get accuracy location,among which we can highlight time diference of arrival -TDOA-. These techniques are based on hiperbolic equations solutions that offer the location of a mobile. This is why the systems based on TDOA are called Hiperbolic Systems. This dissertation has tried develop new analysis for the hiperbolic system of location. This dissertation is marked by optimization of the TDOA measures, which may offer accuracy location of the station mobile.
37
Smith, Scott T. (Scott Thomas) 1976. "Scalable distributed resource location". Thesis, Massachusetts Institute of Technology, 1998. http://hdl.handle.net/1721.1/47618.
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Thesis (S.B. and M.Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1998.Includes bibliographical references (p. 45).
by Scott T. Smith.
S.B.and M.Eng.
38
Nichols, Patrick James 1981. "Location-aware active signage". Thesis, Massachusetts Institute of Technology, 2004. http://hdl.handle.net/1721.1/17964.
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Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2004.Includes bibliographical references (p. 85-86).
Three-dimensional route maps, which depict a path from one location to another, can be powerful tools for visualizing and communicating directions. This thesis presents a client-server architecture for generating and displaying accurate, usable route maps between locations on MIT's campus. Two exemplary clients of this architecture--MITquest, a web based Java applet, and location-aware active signage--demonstrate the flexibility and power of this model for route generation. Additionally, we provide a framework for displaying a set of campus-wide, public events of interest to an MIT visitor, including methods for inferring events from public sources and automatically selecting events of interest.
by Patrick James Nichols, II.
M.Eng.
39
Warda, Peter. "Knowledge, location, and trade". Doctoral thesis, Internationella Handelshögskolan, Högskolan i Jönköping, IHH, Nationalekonomi, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:hj:diva-25754.
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The purpose of this thesis is to analyze how knowledge contained in traded goods influences firms’ demand for labor, and how knowledge-rich routines across space affect the innovative performance in firms and regions. Four research questions are presented that address how knowledge can travel in space. Each research question forms an individual paper in the thesis and can be read separately. The first part of the thesis gives a general introduction and outlines the theoretical background and motivation for the research questions examined in Papers 1 through 4. Papers 1 and 2 address how the knowledge composition of the labor force in Swedish manufacturing firms is impacted by changes in imported goods. Paper 1 analyzes imports of capital and intermediate goods and how their quality influences labor demand in different firm size categories. In Paper 2 the analysis is directed toward an examination of how offshoring of intermediate goods affects different occupations. The technology-specific content of the offshored intermediate goods is emphasized. Moreover, Papers 3 and 4 address how knowledge embodied in exported goods and codified knowledge in patents are affected by changes in new routines. Paper 3 analyzes how firms’ knowledge absorption capacity affects the development, adoption and introduction of new export products among Swedish manufacturing firms. Finally, the focus in Paper 4 is on innovations measured in terms of local patents production in European regions. In this paper, we analyze how the local patents production in a European region benefits both from local R&D inputs in its own region and from spillovers of R&D inputs in other European regions.
40
Navalho, David Precatado. "Unified cooperative location system". Master's thesis, FCT- UNL, 2009. http://hdl.handle.net/10362/2420.
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Dissertação apresentada na Faculdade de
Ciências e Tecnologia da Universidade Nova
de Lisboa para a obtenção do Grau de Mestre
em Engenharia Informática.The widespread use of smaller, less expensive, and more capable mobile devices, has opened the door for more complex and varied mobile computing applications. Additionally, manufacturers are increasingly equipping these handheld devices with every type of wireless connectivity and sensors that can be explored for providing more complex services. In recent years, several techniques for location estimation have been developed, providing different degrees of accuracy. Some of these solutions require the installation of specific hardware in the environment, while others explore the existing infrastructure. In particular, it is possible to explore the existing communication infrastructure to build a location system relying on signal strength measures. However, while several systems already exist to locate users based on different approaches, there is no single one that is good for every situation while providing high accuracy, low cost and ubiquitous coverage. Not only that, but very few research has been made regarding on how a group of users can cooperate to improve accuracy or reduce energy consumption while using the location system. This work presents the Unified Cooperative Location System, a modular and extensible location system. Its modular design can use every available technology on each device and different algorithms for location estimation. This approach allows to provide location services with high availability by relying on different technologies. It also allows to reduce the energy consumption on devices by sharing the responsibility of executing energy-heavy operations. The system also includes an information exchange mechanism, allowing devices to gather location information from nearby users, like GPS or Wi-Fi, which would otherwise be unavailable for some. The results of our experiences show that the possibility of exchanging GSM information provides a practical solution for location estimation based on multiple GSM signals, thus significantly increasing location accuracy with this technology.
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Reeder, Kory Ray. "The Location of Lines". Bowling Green State University / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1521462083959007.
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Sieber, Otto F. "AFRICOM does location matter?" Thesis, Monterey, Calif. : Naval Postgraduate School, 2009. http://edocs.nps.edu/npspubs/scholarly/theses/2009/Mar/09Mar%5FSieber.pdf.
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Thesis (M.A. in Security Studies (Middle East, South Asia, and Sub-Saharan Africa))--Naval Postgraduate School, March 2009.Thesis Advisor(s): Lawson, Letitia. "March 2009." Description based on title screen as viewed on April 24, 2009. Author(s) subject terms: United States Africa Command, AFRICOM, Location decision, Analytical Hierarchy Process (AHP), strategic decision making. Includes bibliographical references (p. 73-77). Also available in print.
43
Promboon, Yajai. "Acoustic emission source location /". Digital version accessible at:, 2000. http://wwwlib.umi.com/cr/utexas/main.
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Yes̨ilkökc̨en, Gülcan N. "Supply connected location-allocation problem /". *McMaster only, 1997.
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Blazevic, Antonio. "Using location-allocation to optimize the location of fire tanker airbases in California /". Available to subscribers only, 2006. http://proquest.umi.com/pqdweb?did=1203554881&sid=28&Fmt=2&clientId=1509&RQT=309&VName=PQD.
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Rechert, Klaus [Verfasser], i Gerhard [Akademischer Betreuer] Schneider. "Sharing location information with trusted peers : : a user-centric analysis of location privacy". Freiburg : Universität, 2013. http://d-nb.info/1114397776/34.
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Jain, Naveen K. "Resource, Strategies, Location Determinants, And Host Country Location Choice By Emerging Market Firms". FIU Digital Commons, 2009. http://digitalcommons.fiu.edu/etd/147.
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The extant literature had studied the determinants of the firms’ location decisions with help of host country characteristics and distances between home and host countries. Firm resources and its internationalization strategies had found limited attention in this literature. To address this gap, the research question in this dissertation was whether and how firms’ resources and internationalization strategies impacted the international location decisions of emerging market firms. To explore the research question, data were hand-collected from Indian software firms on their location decisions taken between April 2000 and March 2009. To analyze the multi-level longitudinal dataset, hierarchical linear modeling was used. The results showed that the internationalization strategies, namely market-seeking or labor-seeking had direct impact on firms’ location decision. This direct relationship was moderated by firm resource which, in case of Indian software firms, was the appraisal at CMMI level-5. Indian software firms located in developed countries with a market-seeking strategy and in emerging markets with a labor-seeking strategy. However, software firms with resource such as CMMI level-5 appraisal, when in a labor-seeking mode, were more likely to locate in a developed country over emerging market than firms without the appraisal. Software firms with CMMI level-5 appraisal, when in market-seeking mode, were more likely to locate in a developed country over an emerging market than firms without the appraisal. It was concluded that the internationalization strategies and resources of companies predicted their location choices, over and above the variables studied in the theoretical field of location determinants.
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Lee, Jeong Heon. "Physical Layer Security for Wireless Position Location in the Presence of Location Spoofing". Diss., Virginia Tech, 2011. http://hdl.handle.net/10919/26417.
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While significant research effort has been dedicated to wireless position location over the past decades, most location security aspects have been overlooked. Recently, with the proliferation of diverse wireless devices and the desire to determine their position, there is an increasing concern about the security of location information which can be spoofed or disrupted by adversaries or unreliable signal sources. This dissertation addresses the problem of securing a radio location system against location spoofing, specifically the characterization, analysis, detection, and localization of location spoofing attacks by focusing on fundamental location estimation issues.
The objective of this dissertation is four-fold. First, it provides an overview of fundamental security issues for position location, particularly associated with range-based localization. Of particular interest are security risks and vulnerabilities in location estimation, types of localization attacks, and their impact. The second objective is to characterize the effects of signal strength and beamforming attacks on range estimates and the resulting position estimate. The characterization can be generalized to a variety of location spoofing attacks and provides insight into the anomalous behavior of range and location estimators when under attack. Through this effort we can also identify effective attacks that are of particular interest to attack detection and localization. The third objective is to develop an effective technique for attack detection which requires neither prior environmental nor statistical knowledge. This is accomplished by exploiting the bilateral behavior of a hybrid framework using two received signal strength (RSS) based location estimators. We show that the resulting approach is effective at detecting attacks with the detection rate increasing with the severity of the induced location error. The last objective of this dissertation is to develop a localization method resilient to attacks and other adverse effects.
Since the detection and localization approach relies solely on RSS measurements in order to be applicable to a wide range of wireless systems and scenarios, this dissertation focuses on RSS-based position location. Nevertheless, many of the basic concepts and results can be applied to any range-based positioning system.Ph. D.
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Kim, Moon-Jeong. "Residential Location Decisions: Heterogeneity and the Trade-off between Location and Housing Quality". The Ohio State University, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=osu1269405095.
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Angel, Julie R. "Location, Location, Location: A Probabilistic Model of Banked Earthwork Placement Within the Central Ohio Landscape During the Early and Middle Woodland Periods". The Ohio State University, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=osu1274205403.
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