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Dissertations / Theses on the topic 'Network maps'
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Division, Johnson City GIS. "Johnson City Street Network - 1993." Digital Commons @ East Tennessee State University, 1993. https://dc.etsu.edu/rare-maps/63.
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Street map of Johnson City, Tennessee created on June 18, 1993 by Johnson City GIS. This map denotes the highways and roads of Johnson City as they were in 1993. No scale is included.https://dc.etsu.edu/rare-maps/1062/thumbnail.jpg
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Quintin, G. M. M. "Implementation of self-organizing maps neural networks on network parallel computers." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape7/PQDD_0004/MQ44855.pdf.
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Eduards, Rasmus. "Custom Base Maps for Utility Network Applications." Thesis, KTH, Geoinformatik, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-264936.
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Web maps are today used more than ever. These are often displayed in geographical information system solutions. Web maps are often constructed in the terms of different layers where the bottom-most layer is called base map or background map. A specific kind of base maps are those that are the canvas for utility networks. These base maps can look vastly different from each other. Sometimes the base map can be overlooked. Currently there are different theories and opinions on how these base maps shall be designed and what information they shall contain. This thesis investigates a suitable base map design for utility network management and also creates some prototypes as a proof of concept. The thesis focus mostly on three factors, colour, information visualisation and symbology. This is investigated by using a user-centred design approach and comparing it to existing findings in literature and among map theories. The user-centred design process involves a case study performed with participants that work with utility networks in web map solutions. The research method is an iterative process where the participants are answering three quantitative surveys. The surveys includes prototypes which is refined for each step after analysing the participants answers. The thesis concludes that low saturated colours is good practise to enhance the network, this is both evident in literature as well as in the case study. Amount of lightness in the base map seem to be more of a opinionated matter and can highly differentiate depending on users device. Using hue is recommended to make borders between map elements more distinct. The base map shall only obtain the most relevant information and more specific information is recommended to be added through additional layers. Further studies need to be done in order to investigate the networks design and there is also a need to investigate how a map solution with several layers shall be design and how the relationships between those layers shall be constructed for utility network management
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Ramadas, Manikantan. "Detecting Anomalous Network Traffic With Self-Organizing Maps." Ohio University / OhioLINK, 2003. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1049472005.
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Bäcklund, Jakob, and Elias Kärnsund. "Implementation of a Crowd-based InformationSharing System for Network Performance Maps." Thesis, Linköpings universitet, Institutionen för datavetenskap, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-110144.
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This thesis examines ways to improve the user experience of a mobile Internetconnection. We discuss how this can be achieved using dierent techniques,but primarily focus on techniques using network performance maps. We designand implement a proof-of-concept system that allows users to record networkperformance experience and share these records among each other such as toimprove their future performance.We use bandwidth measurements at locations over an area to create a networkperformance map. We examine what such maps can be used for and howit is best implemented. We also create a proof-of-concept implementation fora system creating network performance maps using multiple mobile devices.The thesis also discusses how information sharing between mobile devices usingWi-Fi networks can be done eciently. This is also something we use inour proof-of-concept implementation, when synchronizing data between mobiledevices.In summary, our Android-based proof-of-concept implementation allows usersto perform bandwidth measurements, and to share these measurements amongeach other, such as to help each other improve their network performance maps.A good such system allows users to get an overview of the network performanceover the measured area; information that can be used to optimize the Internetusage via download scheduling or bit rate adaption.
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Cranston, Daniel, and Filip Skarfelt. "Normalized Convolution Network and Dataset Generation for Refining Stereo Disparity Maps." Thesis, Linköpings universitet, Datorseende, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-158449.
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Finding disparity maps between stereo images is a well studied topic within computer vision. While both classical and machine learning approaches exist in the literature, they frequently struggle to correctly solve the disparity in regions with low texture, sharp edges or occlusions. Finding approximate solutions to these problem areas is frequently referred to as disparity refinement, and is usually carried out separately after an initial disparity map has been generated. In the recent literature, the use of Normalized Convolution in Convolutional Neural Networks have shown remarkable results when applied to the task of stereo depth completion. This thesis investigates how well this approach performs in the case of disparity refinement. Specifically, we investigate how well such a method can improve the initial disparity maps generated by the stereo matching algorithm developed at Saab Dynamics using a rectified stereo rig. To this end, a dataset of ground truth disparity maps was created using equipment at Saab, namely a setup for structured light and the stereo rig cameras. Because the end goal is a dataset fit for training networks, we investigate an approach that allows for efficient creation of significant quantities of dense ground truth disparities. The method for generating ground truth disparities generates several disparity maps for every scene measured by using several stereo pairs. A densified disparity map is generated by merging the disparity maps from the neighbouring stereo pairs. This resulted in a dataset of 26 scenes and 104 dense and accurate disparity maps. Our evaluation results show that the chosen Normalized Convolution Network based method can be adapted for disparity map refinement, but is dependent on the quality of the input disparity map.
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Sawant, Ankush. "Time-based Approach to Intrusion Detection using Multiple Self-Organizing Maps." Ohio University / OhioLINK, 2005. http://www.ohiolink.edu/etd/view.cgi?ohiou1113833809.
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Aliakbarian, Meysam. "Derivation of continuous zoomable road network maps through utilization of Space-Scale-Cube." Master's thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2014. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-153432.
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The process of performing cartographic generalization in an automatic way applied on geographic information is of highly interest in the field of cartography, both in academia and industry. Many research e↵orts have been done to implement di↵erent automatic generalization approaches. Being able to answer the research question on automatic generalization, another interesting question opens up: ”Is it possible to retrieve and visualize geographic information in any arbitrary scale?” This is the question in the field of vario-scale geoinformation. Potential research works should answer this question with solutions which provide valid and efficient representation of geoinformation in any on-demand scale. More brilliant solutions will also provide smooth transitions between these on-demand arbitrary scales. Space-Scale-Cube (Meijers and Van Oosterom 2011) is a reactive tree (Van Oosterom 1991) data structure which shows positive potential for achieving smooth automatic vario-scale generalization of area features. The topic of this research work is investigation of adaptation of this approach on an interesting class of geographic information: road networks datasets. Firstly theoretical background will be introduced and discussed and afterwards, implementing the adaptation would be described. This research work includes development of a hierarchical data structure based on road network datasets and the potential use of this data structure in vario-scale geoinformation retrieval and visualization.
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Edler, Lars [Verfasser]. "Analysing Economic Data with Self-Organizing Maps : A Geometric Neural Network Approach / Lars Edler." Kiel : Universitätsbibliothek Kiel, 2008. http://d-nb.info/1019667230/34.
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Tavernari, Daniele. "Statistical and network-based methods for the analysis of chromatin accessibility maps in single cells." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2016. http://amslaurea.unibo.it/12297/.
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In questo lavoro, metodi provenienti dalla Fisica, dalla Statistica e dalla Teoria dei Grafi sono stati impiegati per caratterizzare ed analizzare profili di apertura e accessibilità della cromatina ottenuti con la tecnica ATAC-seq in singole cellule, nella fattispecie linfociti B provenienti da tre pazienti affetti da Leucemia Linfocitica Cronica.
Una pipeline bioinformatica è stata sviluppata per processare i dati di sequencing ed ottenere le posizioni accessibili del genoma per ciascuna cellula. La quantità di regioni aperte e la loro distribuzione spaziale lungo il DNA sono state caratterizzate. Infine, l’apertura simultanea nelle stesse singole cellule di regioni regolatrici è stata impiegata come metrica per valutare relazioni funzionali, e in questo modo grafi tra enhancer e promoter sono stati costruiti e le loro proprietà sono state analizzate.
La distribuzione spaziale lungo il genoma di regioni aperte consecutive ricapitola proprietà strutturali come gli array di nucleosomi e le strutture a loop della cromatina. Inoltre, i profili di accessibilità delle regioni regolatrici sono significativamente conservati nelle singole cellule. I network tra enhancer e promoter forniscono un modo per caratterizzare la rilevanza di ciascuna regione regolatrice in termini di centralità. Le statistiche sulla connettività tra enhancer e promoter confermano il modello di relazione uno-a-uno come il più frequente, in cui un promoter è regolato dall'enhancer ad esso più vicino. Infine, anche il funzionamento dei superenhancer è stato indagato.
In conclusione, ATAC-seq si rivela un'efficace tecnica per indagare l'apertura della cromatina in singole cellule, i cui profili di accessibilità ricapitolano caratteristiche strutturali e funzionali della cromatina. Al fine di indagare i meccanismi della malattia, il panorama di accessibilità dei lifociti tumorali può essere confrontato con quello di cellule sane e cellule trattate con farmaci epigenetici.
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Young, Ryan F. "Utilization of a Neural Network to Improve Fuel Maps of an Air-Cooled Internal Combustion Engine." Ohio University / OhioLINK, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1282143527.
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Fallgren, Per. "Användning av Self Organizing Maps som en metod att skapa semantiska representationer ur text." Thesis, Linköpings universitet, Institutionen för datavetenskap, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-119765.
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Denna studie är ett kognitionsvetenskapligt examensarbete som syftar på att skapa en modell som skapar semantiska representationer utifrån ett mer biologiskt plausibelt tillvägagångssätt jämfört med traditionella metoder. Denna modell kan ses som ett första steg i utredningen av ansatsen som följer. Studien utreder antagandet om Self Organizing Maps kan användas för att skapa semantiska representationer ur stora mängder text utifrån ett distribuerat inspirerat tillvägagångssätt. Resultatet visar på ett potentiellt fungerande system, men som behöver utredas vidare i framtida studier för verifiering av högre grad.
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Junqueira, Marianna Meirelles. "Transformando textos em mapas cognitivos: desenvolvimento e um exemplo de aplicação." Universidade de São Paulo, 2013. http://www.teses.usp.br/teses/disponiveis/81/81132/tde-10042014-194736/.
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O principal objetivo dessa pesquisa consistiu em desenvolver e analisar uma ferramenta de transformação de textos escritos por estudantes em mapas cognitivos para fornecer de forma visual, global e sintética, uma visão das principais relações conceituais citadas em um conjunto de textos. A ferramenta foi estruturada em dois momentos: primeiramente os textos foram lidos para a geração de uma matriz de associação que representa as relações encontradas entre cada par de conceitos. Em seguida, as matrizes foram somadas e, a partir da matriz final, foram construídos diferentes tipos de mapas cognitivos. Para o desenvolvimento de tal ferramenta, foram coletados dados na disciplina Introdução ao Ensino de Química do curso de licenciatura em química do IQ-USP. Essa disciplina foi organizada em três módulos denominados: natureza da ciência, concepções de ensino e aprendizagem, e natureza do conhecimento químico e a aprendizagem da química. No final de cada módulo, foi aplicada uma questão dissertativa com uma lista de conceitos pré-selecionados que objetivava conhecer as relações conceituais expressas pelos estudantes sobre o tema em questão. A partir das respostas dos alunos foram realizados alguns testes: (i) com o software ALA-Reader® e os seus modos de leitura L e S para a quantificação das relações entre conceitos presentes nos textos e geração da matriz de associação; (ii) para verificação da influência da natureza dos textos na contabilização das relações entre conceitos e na elaboração dos mapas e (iii) para a obtenção das representações gráficas do tipo vizinho(s) mais próximo(s) e corte percentual representativo. A partir dos testes realizados, foi possível concluir que o modo de leitura S do programa ALA-Reader® é mais coerente e deve ser utilizado para a leitura dos textos. Além disso, a matriz de associação gerada depende essencialmente da estrutura do texto em questão - texto original ou texto modificado para proposições, tendo em vista a diferença na contabilização das relações par a par encontradas nos textos. Os dois tipos de redes de conceitos apresentam diferentes focos, porém, podem ser considerados complementares. As redes vizinho(s) mais próximo(s) se mostraram interessantes para análises que requerem todos os conceitos fornecidos ou almejam buscar as relações feitas por determinados conceitos. As redes com corte percentual representativo apresentaram-se auxiliares para investigações que requeiram fazer um recorte nos pontos considerados principais pelos sujeitos. No discorrer do texto, também são apresentados alguns recursos que podem ser acrescidos nas redes de conceitos para auxiliar as análises, como a inserção das frases de ligação gerando um mapa conceitual ou o destaque dos conceitos centrais nas estruturas. Com o objetivo de ilustrar o uso das representações gráficas construídas, foi feita uma breve interpretação dessas no contexto da disciplina na qual os dados foram coletados. A partir dessa análise, foi possível, por exemplo, elencar as principais ideias explicitadas pelos alunos e relacioná-las ao que foi discutido em sala de aula.The main objective of this research was to develop and analyze a tool to turn texts written by students into cognitive maps to provide a visual, global and synthetic representation of the key conceptual relationships mentioned in a set of texts. The tool was structured in two phases: first the texts were read to generate a proximity file representing the relationships found between each pair of concepts. Then, the proximity files were added and from the final file different types of cognitive maps were built. For the development of this tool, data were collected in the academic discipline entitled Introduction to Teaching Chemistry, for the degree in Chemistry at IQ-USP. This academic discipline was organized in three modules called: nature of science, conceptions of teaching and learning, and the nature of chemical knowledge and Chemistry learning. At the end of each module, an essay question was applied with a list of pre-selected concepts that aimed to investigate the conceptual relations established by the students on the topic in question. From students\' responses some tests were performed: (i) with the ALA-Reader® software and its reading modes L and S to quantify the relationships between concepts present in texts and generate the proximity file, (ii) to verify the influence of the nature of the texts in the accounting of the relationships between concepts and in the elaboration of maps, and (iii) to obtain graphical representations of close neighbors type and representative percentage cut. Based on the tests, it was concluded that the mode S of reading of the ALA Reader® program is more consistent and should be used for the reading of the texts. Furthermore, the proximity file generated depends essentially on the structure of the text in question - the original text or the modified one for propositions, in view of the difference in the accounting of conceptual relations found in the texts. The two types of networks of concepts have different focuses, however, they can be considered complementary. The close neighbors networks were interesting for analysis which require all concepts provided or aim to seek relations established by certain concepts. Networks with representative percentage cut proved to be auxiliary for those investigations which require a cut in the main points considered by the subjects. Throughout the text, some features that can be added to the networks to support the analysis are also presented, such as: the insertion of linking phrases generating a concept map or the highlight of the central concepts in the structures. In order to illustrate the use of graphical representations built, a brief interpretation of them was made based on the context of the academic discipline in which the data were collected. This study enabled, for example, the development of a list the main ideas conveyed by students and the possibility to relate them to what was discussed in class
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Bergkvist, Conny, and Stefan Wikner. "Self-organizing maps for virtual sensors, fault detection and fault isolation in diesel engines." Thesis, Linköping University, Department of Electrical Engineering, 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-2757.
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This master thesis report discusses the use of self-organizing maps in a diesel engine management system. Self-organizing maps are one type of artificial neural networks that are good at visualizing data and solving classification problems. The system studied is the Vindax(R) development system from Axeon Ltd. By rewriting the problem formulation also function estimation and conditioning problems can be solved apart from classification problems.
In this report a feasibility study of the Vindax(R) development system is performed and for implementation the inlet air system is diagnosed and the engine torque is estimated. The results indicate that self-organizing maps can be used in future diagnosis functions as well as virtual sensors when physical models are hard to accomplish.
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Danielsson, Jakob, and Anton Forsberg. "Crowd-based Network Prediction : a Comparison of Data-exchange Policies." Thesis, Linköpings universitet, Institutionen för datavetenskap, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-119685.
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Network performance maps can be used as a tool to predict network conditions at a given location, based on previous measurements at that location. By using measurement data from other users in similar locations, these predictions can be significantly improved. This thesis looks into the accuracy of predictions when using different approaches to distribute this data between users, we compare the accuracy of predictions achieved by using a central server containing all known measurements to the accuracy achieved when using a crowd-based approach with opportunistic exchanges between users. Using data-driven simulations, this thesis also compares and evaluates the impact of using different exchange policies. Based on these simulations we conclude which of the exchange policies provides the most accurate predictions.
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Vorminder, Sarah. "The sociology of maps : Land surveying production and networking practices during Storskiftet in Sweden 1761–1769." Thesis, Uppsala universitet, Historiska institutionen, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-385272.
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Freund, Alexander J. "The Necessity and Challenges of Automatic Causal Map Processing: A Network Science Perspective." Miami University / OhioLINK, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=miami1619545359648916.
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Radwan, Mohsen Nada Ashraf. "Lightweight & Efficient Authentication for Continuous Static and Dynamic Patient Monitoring in Wireless Body Sensor Networks." Thesis, Université d'Ottawa / University of Ottawa, 2019. http://hdl.handle.net/10393/39938.
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The emergence of the Internet of Things (IoT) brought about the widespread of Body Sensor Networks (BSN) that continuously monitor patients using a collection of tiny-powered and lightweight bio-sensors offering convenience to both physicians and patients in the modern health care environment. Unfortunately, the deployment of bio-sensors in public hacker-prone settings means that they are vulnerable to various security threats exposing the security and privacy of patient information. This thesis presents an authentication scheme for each of two applications of medical sensor networks. The first is an ECC based authentication scheme suitable for a hospital-like setting whereby the patient is hooked up to sensors connected to a medical device such as an ECG monitor while the doctor needs real-time access to continuous sensor readings. The second protocol is a Chebyshev chaotic map-based authentication scheme suitable for deployment on wearable sensors allowing readings from the lightweight sensors connected to patients to be sent and stored on a trusted server while the patient is on the move. We formally and informally proved the security of both schemes. We also simulated both of them on AVISPA to prove their resistance to active and passive attacks. Moreover, we analyzed their performance to show their competitiveness against similar schemes and their suitability for deployment in each of the intended scenarios.
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Chetty, Vasu Nephi. "Necessary and Sufficient Informativity Conditions for Robust Network Reconstruction Using Dynamical Structure Functions." BYU ScholarsArchive, 2012. https://scholarsarchive.byu.edu/etd/3810.
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Dynamical structure functions were developed as a partial structure representation of linear time-invariant systems to be used in the reconstruction of biological networks. Dynamical structure functions contain more information about structure than a system's transfer function, while requiring less a priori information for reconstruction than the complete computational structure associated with the state space realization. Early sufficient conditions for network reconstruction with dynamical structure functions severely restricted the possible applications of the reconstruction process to networks where each input independently controls a measured state. The first contribution of this thesis is to extend the previously established sufficient conditions to incorporate both necessary and sufficient conditions for reconstruction. These new conditions allow for the reconstruction of a larger number of networks, even networks where independent control of measured states is not possible. The second contribution of this thesis is to extend the robust reconstruction algorithm to all reconstructible networks. This extension is important because it allows for the reconstruction of networks from real data, where noise is present in the measurements of the system. The third contribution of this thesis is a Matlab toolbox that implements the robust reconstruction algorithm discussed above. The Matlab toolbox takes in input-output data from simulations or real-life perturbation experiments and returns the proposed Boolean structure of the network. The final contribution of this thesis is to increase the applicability of dynamical structure functions to more than just biological networks by applying our reconstruction method to wireless communication networks. The reconstruction of wireless networks produces a dynamic interference map that can be used to improve network performance or interpret changes of link rates in terms of changes in network structure, enabling novel anomaly detection and security schemes.
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Huo, Juan. "Adaptive map alignment in the superior colliculus of the barn owl : a neuromorphic implementation." Thesis, University of Edinburgh, 2010. http://hdl.handle.net/1842/4762.
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Adaptation is one of the basic phenomena of biology, while adaptability is an important feature for neural network. Young barn owl can well adapt its visual and auditory integration to the environmental change, such as prism wearing. At first, a mathematical model is introduced by the related study in biological experiment. The model well explained the mechanism of the sensory map realignment through axongenesis and synaptogenesis. Simulation results of this model are consistent with the biological data. Thereafter, to test the model’s application in hardware, the model is implemented into a robot. Visual and auditory signals are acquired by the sensors of the robot and transferred back to PC through bluetooth. Results of the robot experiment are presented, which shows the SC model allowing the robot to adjust visual and auditory integration to counteract the effects of a prism. Finally, based on the model, a silicon Superior Colliculus is designed in VLSI circuit and fabricated. Performance of the fabricated chip has shown the synaptogenesis and axogenesis can be emulated in VLSI circuit. The circuit of neural model provides a new method to update signals and reconfigure the switch network (the chip has an automatic reconfigurable network which is used to correct the disparity between signals). The chip is also the first Superior Colliculus VLSI circuit to emulate the sensory map realignment.
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Hollinger, David L. "Crop Condition and Yield Prediction at the Field Scale with Geospatial and Artificial Neural Network Applications." Kent State University / OhioLINK, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=kent1310493197.
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Larsson, Susanna. "Monocular Depth Estimation Using Deep Convolutional Neural Networks." Thesis, Linköpings universitet, Datorseende, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-159981.
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For a long time stereo-cameras have been deployed in visual Simultaneous Localization And Mapping (SLAM) systems to gain 3D information. Even though stereo-cameras show good performance, the main disadvantage is the complex and expensive hardware setup it requires, which limits the use of the system. A simpler and cheaper alternative are monocular cameras, however monocular images lack the important depth information. Recent works have shown that having access to depth maps in monocular SLAM system is beneficial since they can be used to improve the 3D reconstruction. This work proposes a deep neural network that predicts dense high-resolution depth maps from monocular RGB images by casting the problem as a supervised regression task. The network architecture follows an encoder-decoder structure in which multi-scale information is captured and skip-connections are used to recover details. The network is trained and evaluated on the KITTI dataset achieving results comparable to state-of-the-art methods. With further development, this network shows good potential to be incorporated in a monocular SLAM system to improve the 3D reconstruction.
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Hulanský, Jozef. "Vizualizace polohy senzorových jednotek." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2014. http://www.nusl.cz/ntk/nusl-220665.
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This master thesis deals with wireless sensor network with protocol IPv6. In the begining there are explained the priciples of communication in wireless sensor network, and based on this teories are configured a wireles network with predefined development kit. Furthermore, by using geographic coordinates, positions of the nodes are displayed on a website, what is a part of this thesis. On this website are also presented the measured values from sensors. For saving all informations and measured values about each nodes was used remote MySQL server. Communication between this server and 6LoWPAN network provide Perl script which is runs at periodical intervals. With this method automatization of the whole system are ensured.
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Masakapalli, Shyam Kumar. "Network flux analysis of central metabolism in plants." Thesis, University of Oxford, 2011. http://ora.ox.ac.uk/objects/uuid:ac8b3836-9ab7-4060-b50a-df8aaa0e4ba5.
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The aim of this thesis was to develop stable-isotope steady-state metabolic flux analysis (MFA) based on 13C labeling to quantify intracellular fluxes of central carbon metabolism in plants. The experiments focus on the analysis of a heterotrophic cell suspension culture of Arabidopsis thaliana (L) Heynh. (ecotype Landsberg erecta). The first objective was to develop a robust methodology based on combining high quality steady-state stable labeling data, metabolic modeling and computational analysis. A comprehensive analysis of the factors that influence the outcome of MFA was undertaken and best practice established. This allowed a critical analysis of the subcellular compartmentation of carbohydrate oxidation in the cell culture. The second objective was to apply the methodology to nutritional perturbations of the cell suspension. A comparison of growth on different nitrogen sources revealed that transfer to an ammonium-free medium: (i) increased flux through the oxidative pentose phosphate pathway (oxPPP) by 10% relative to glucose utilisation; (ii) caused a substantial decrease in entry of carbon into the tricarboxylic acid cycle (TCA); and (iii) increased the carbon conversion efficiency from 55% to 69%. Although growth on nitrate alone might be expected to increase the demand for reductant, the cells responded by decreasing the assimilation of inorganic N. Cells were also grown in media containing different levels of inorganic phosphate (Pi). Comparison of the flux maps showed that decreasing Pi availability: (i) decreased flux through the oxPPP; (ii) increased the proportion of substrate fully oxidised by the TCA cycle; and (iii) decreased carbon conversion efficiency. These changes are consistent with redirection of metabolism away from biosynthesis towards cell maintenance as Pi is depleted. Although published genome-wide transcriptomic and metabolomic studies suggest that Pi starvation leads to the restructuring of carbon and nitrogen metabolism, the current analysis suggests that the impact on metabolic organisation is much less extreme.
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Matus, Gabriel. "Využití umělé inteligence v podnikatelství." Master's thesis, Vysoké učení technické v Brně. Fakulta podnikatelská, 2016. http://www.nusl.cz/ntk/nusl-234840.
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This work deals with traveling salesman problem (TSP) and examines it’s possibilities to use in business. It is about the optimization of the travel cost, saving time and unnecessary mileage. Part of the work is a program with a GUI written in program MATLAB. Program uses neural networks to calculate the most effective path between places, where the trader has to reach. It’s possible to use the algorithm for many purposes, e.g. distribution of goods, store management, planning of PCBs or rescue services. Program communicates with the Google Maps API server, which provides the actual information of the path.
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Žoldoš, Petr. "Aplikace pro zobrazení modelu bezdrátové sítě." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2011. http://www.nusl.cz/ntk/nusl-218923.
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The first step of Master's thesis was to gain knowledge about technologies Adobe Flex SDK and Google Maps API. Knowledge was used to develop an application, which let users create, generate and modify graphical wireless network model. Position and characteristics of each single unit are monitored either in a map interface or in building plans. Dates are gathered from forms filled by current user, from external file or periodically from connected database system. Theoretical part enlightens technologies that were used. It describes program development and solutions, which were made, along with examples of the source code. Included are printscreens of graphical user interface as well as description of how does it all work.
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Rastogi, Preeti. "Assessing Wireless Network Dependability Using Neural Networks." Ohio University / OhioLINK, 2005. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1129134364.
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Arosio, Lucia. "Seismic ambient noise tomography of central Italy using a deep learning algorithm." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2022. http://amslaurea.unibo.it/25637/.
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This work aims at testing a convolutional neural network (CNN), developed by Zhang et al. (2020), to measure group velocity of Rayleigh waves, extracted from records of background seismic noise, and at studying the crustal structure of Central Italy.
I investigate an area in Central Italy by means of seismograms recorded by 73 seismic stations located approximately in the Central and Northern Apennines. The study is part of a larger project, named MUSE (Multiparametric and mUltiscale Study of Earthquake preparatory phase), that has the goal, among others, of detecting the spatial and temporal evolution of the velocity in the Earth’s crust. In this context, I have obtained the group velocity maps representative of the entire time span, from 01/01/2010 to 01/05/2021.
In this study, I employ the technique of seismic ambient noise interferometry to extract Rayleigh wave measurements from the fully diffuse wavefields (Shapiro and Campillo, 2004). I then use CNN and other methods to determine the dispersion characteristics of the Rayleigh wave fundamental mode: a traditional method, requiring operator interaction; a classical automated procedure; and the recent neural network. I then invert each of the three dispersion data sets retrieved with the different approaches, to compute group velocity maps at different periods. I compare the performance of the different methods employed, and thus evaluate the performance of the CNN network, by comparing the maps among them, with geological observations, and also with a pre-existing model from the literature (Molinari et al., 2015).
The CNN method shows excellent potential, but – at the current stage of development – it needs more accurate and specific training to reach the precision of manual picks. My maps image the crustal structure of the Northern Apennines area with unprecedented detail. This work poses the basis for further studies, to image the time variations of 3D structure (i.e., 4D tomography).
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Nordlöv, Anna. "Incorporating GIS in urban planning : Quantifying accessibility to sociotopic user values for use in urban planning and citizen dialogue – a case study of Årstafältet, Stockholm." Thesis, KTH, Geoinformatik, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-231027.
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There exists a debate regarding where to build new housing in increasingly denser cities today. Often it is the green spaces that must be sacrificed which lead to conflicts among decision makers and citizens. Although, some sources claim (Byrne et al., 2010; Van Herzele & Wiedemann, 2003) that it is not only the fact that there is a green area close to you that matters; but rather which values that piece of green land offers you as a citizen. Values of parks can be described as the features or attributes the park area possess that inspire people to go to and stay there. In Stockholm, Sweden these values are connected to sociotopes, a delimited area containing a set of user values with social meaning (Ståhle, 2006). User values thus describes an activity or an experience that is present at a location. There exists a lack of and a desire for more detailed mapping of user values of green areas as well as a potential need for finding an efficient method for aiding in citizen dialogue when green areas are planned for urban development. The purpose of this thesis is thus to try to incorporate geographical information science (GIS) in urban planning by investigating if it is possible to measure the physical accessibility of user values of a green area before and after its urban development in lines with the recommendations on accessibility from the municipality. Then, try to create a visual tool to be used in the designing phase of urban planning and in citizen dialogue when developing a new urban area. To do this, a case study was done of Årstafältet, a green area in Stockholm that is planned for urban development and improvement of existing and creation of new user values. By using GIS, the user values were defined spatially, and geographical data based on the study area currently as well as after the development where found or created based on descriptions of the new area in planning documents. Accessibility was defined as the physical distance a resident must walk from their home to the closest access point of a user value. Based on previous research, 1000m was deemed the largest distance a resident can walk to be considered a potential user of a user value. An access analysis was made for all residents within the study area to the closest access point of every user value. The results of the analysis were visualized in two ways, one regarding urban design and another regarding citizen dialogue in the form of bivariate maps and a GIS web application. Apart from the visual maps, some numerical results regarding distance, distance change and number of accessed user values were calculated. The maps point out the areas that are mostly affected both in the negative and positive sense. More research needs to be done to decide the best way of deriving and using the numerical measures. Because of the many assumptions and generalizations made in the study it is difficult to make any overall conclusions about the accessibility of user values at Årstafältet. What is more interesting is the reception by people in the field of GIS and urban planning; which was in general positive. They noted upon the important aspect of concretize the design phase of the urban planning process, which often is based on feeling, and create a solid ground to base more informed decisions upon. The visualization methods presented were well received as tools for enabling more people access into the planning process as well as an easy way of exploring geographical data. Also, the possibility to extend this type of access analysis beyond sociotopic user values was deemed as very useful. Lastly, they expressed that this type of analysis is desired by the workers in the field and highly relevant in today’s urban planning process.
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McGlinchey, Stephen John. "Transformation-invariant topology preserving maps." Thesis, University of the West of Scotland, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.311794.
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Danielsson, Melinda. "Exchange of Tracking Information on a Shared Platform - How the space of interaction can be designed to increase practitioners' motivation in physical activity outdoors." Thesis, Malmö universitet, Fakulteten för kultur och samhälle (KS), 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:mau:diva-23092.
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Interactive technology in the area of fitness and wellbeing has gained increasing interest in the HCI community with the emphasize to design technologies and tools in the aim to encourage people and make them more engaged in physical activity. However, there is little investigation in which precise factors that contribute to user motivation and self-efficacy.Physical activity outdoors together with tracking devices enables the users to view and interpret the results from their practice based on movements. The data can then be visualized on geographic maps, which are powerful tools for presentation. Online platforms on the web give users the opportunity to share their own results together with other practitioners’ results. This creates a shared network of practitioners in a world-wide online setting, based on geolocated information visualized on geographic maps. The study starts with the hypothesis that the space of interaction on a map-based social network platform can be further developed in the aim to increase practitioners’ motivation in physical activity. Two approaches are identified in the study: comparative and supportive. The study examines how they can be integrated in the space of a map-based social network platform in the aim to motivate practitioners. The study results in different kinds of features and investigate in practitioners’ experience of them.
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Víteček, Petr. "Vícekriteriální návrh pokrytí území rádiovým signálem." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2014. http://www.nusl.cz/ntk/nusl-220363.
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This thesis deals with radio network design for a chosen part of a map. Here map is represented by digital map file, which was created within the project DEM. First step is to calculate distances between points in chosen map. With help of optimization algorithms, appropriate position of transceiver in the map and parameters of radio systems are determined, also final coverage by radio signal, represented by intensity of electric field or received power in whole map. The optimization algorithm is used to find the best solution in terms of input parameters (e.g. power of transmitter, height of mast) and resulting coverage of land by radio signal.
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ROBLES, FELICIA ANNAMARIA. "Young adults from disrupted families. A study on relations." Doctoral thesis, Università Cattolica del Sacro Cuore, 2018. http://hdl.handle.net/10280/51025.
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La famiglia nell'attualità è attraversata da cambiamenti che stanno trasformando le fondamenta della identità personale, gli assiomi della vita quotidiana. Il caso della famiglia che ha attraversato una rottura ed è contrassegnata da separazione e divorzio, solleva un gran numero di questioni umane e sociali e origina diverse transizioni, che sono state al centro dell'approfondimento oggetto di questa tesi dottorale, condotto su un campione di giovani adulti italiani. Essa mostra, nella fattispecie attraverso le peculiari caratteristiche della ricerca qualitativa, i tratti salienti di specifici metodi visuali, denominati "Family map" e "Life line". Essi hanno contribuito a definire la struttura, il posizionamento relazionale dei membri della famiglia, le stesse relazioni tra essi, nonchè di concettualizzare chi "appartiene" a una famiglia che ha attraversato un cambiamento, una transizione, che porta dunque con sè un corredo di eventi correlati. L'intervistato ha partecipato di volta in volta secondo una modalità (inter)attiva e ha descritto graficamente all'interno delle quattro specifiche sezioni ed i cerchi concentrici della mappa e poi lungo la linea, quali relazioni e fatti sono più o meno importanti. L'intervistatore ha potuto rivolgere domande volte ad acquisire informazioni su alcuni processi di cambiamento e la prospettiva peculiare di tale cambiamento, così come percepita da ciascun attore, ad esempio in riferimento ad eventi passati o presenti. Attraverso lo specifico snodarsi grafico dei supporti - allo sesso tempo fornendo un inquadramento consistente di dati- questo lavoro ha gettato luce su cosa le relazioni familiari, gli eventi e le rappresentazioni configurano nella percezione della persona coinvolta. La scommessa posta attraverso l'uso di questi metodi visuali è quella di continuare a concepire gli individui in termini di approccio relazionale, attraverso l'interdipendenza con il sè, l'altro da sè e il mondo, lungo tutto il corso della propria esistenza. Un grande contributo di questo strumento sui generis è che ha aperto le porte a numerose altre domande che stimolano la ricerca di risposte e la stessa futura ricerca riguardante i figli di separati.Many changes are affecting the family today, transforming the foundations of self-identity, which are the core models for everyday personal life. The situation of family disruption, such as separation and divorce, raises either a number of human and social issues, and transitions which deserved to be better understood in this PhD thesis, being carried out on a sample of young Italian adults. It shows in the form of qualitative research the main features of specific visual methods, the Family map and Life line. They contributed to define the structure, the positions of family members, the relationships between them and conceptualize who belongs to a family that has changed, with crucial events related. The interviewee has been actively identifying and describing graphically (within the four sections and the concentric circles of the map and along the line) which relations and facts are more or less relevant. The interviewer could ask questions in order to get some processes of change and the actors’ own perception of such change, e.g. with reference to current state or past events. Along a specific visual development of the graphs -while providing a helpful framework- this research throwed some light on what family relationships, events and representations are on the perception of the person involved. The challenge posed for this visual methods is to continue to conceive of individuals in terms of relational approach, through the interdependence with self, others, and the world during the course of life. A great contribution of this tool sui generis is that it opened the door to numerous additional questions concerning children of divorce, that need answers and further research.
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ROBLES, FELICIA ANNAMARIA. "Young adults from disrupted families. A study on relations." Doctoral thesis, Università Cattolica del Sacro Cuore, 2018. http://hdl.handle.net/10280/51025.
Full textAbstract:
La famiglia nell'attualità è attraversata da cambiamenti che stanno trasformando le fondamenta della identità personale, gli assiomi della vita quotidiana. Il caso della famiglia che ha attraversato una rottura ed è contrassegnata da separazione e divorzio, solleva un gran numero di questioni umane e sociali e origina diverse transizioni, che sono state al centro dell'approfondimento oggetto di questa tesi dottorale, condotto su un campione di giovani adulti italiani. Essa mostra, nella fattispecie attraverso le peculiari caratteristiche della ricerca qualitativa, i tratti salienti di specifici metodi visuali, denominati "Family map" e "Life line". Essi hanno contribuito a definire la struttura, il posizionamento relazionale dei membri della famiglia, le stesse relazioni tra essi, nonchè di concettualizzare chi "appartiene" a una famiglia che ha attraversato un cambiamento, una transizione, che porta dunque con sè un corredo di eventi correlati. L'intervistato ha partecipato di volta in volta secondo una modalità (inter)attiva e ha descritto graficamente all'interno delle quattro specifiche sezioni ed i cerchi concentrici della mappa e poi lungo la linea, quali relazioni e fatti sono più o meno importanti. L'intervistatore ha potuto rivolgere domande volte ad acquisire informazioni su alcuni processi di cambiamento e la prospettiva peculiare di tale cambiamento, così come percepita da ciascun attore, ad esempio in riferimento ad eventi passati o presenti. Attraverso lo specifico snodarsi grafico dei supporti - allo sesso tempo fornendo un inquadramento consistente di dati- questo lavoro ha gettato luce su cosa le relazioni familiari, gli eventi e le rappresentazioni configurano nella percezione della persona coinvolta. La scommessa posta attraverso l'uso di questi metodi visuali è quella di continuare a concepire gli individui in termini di approccio relazionale, attraverso l'interdipendenza con il sè, l'altro da sè e il mondo, lungo tutto il corso della propria esistenza. Un grande contributo di questo strumento sui generis è che ha aperto le porte a numerose altre domande che stimolano la ricerca di risposte e la stessa futura ricerca riguardante i figli di separati.Many changes are affecting the family today, transforming the foundations of self-identity, which are the core models for everyday personal life. The situation of family disruption, such as separation and divorce, raises either a number of human and social issues, and transitions which deserved to be better understood in this PhD thesis, being carried out on a sample of young Italian adults. It shows in the form of qualitative research the main features of specific visual methods, the Family map and Life line. They contributed to define the structure, the positions of family members, the relationships between them and conceptualize who belongs to a family that has changed, with crucial events related. The interviewee has been actively identifying and describing graphically (within the four sections and the concentric circles of the map and along the line) which relations and facts are more or less relevant. The interviewer could ask questions in order to get some processes of change and the actors’ own perception of such change, e.g. with reference to current state or past events. Along a specific visual development of the graphs -while providing a helpful framework- this research throwed some light on what family relationships, events and representations are on the perception of the person involved. The challenge posed for this visual methods is to continue to conceive of individuals in terms of relational approach, through the interdependence with self, others, and the world during the course of life. A great contribution of this tool sui generis is that it opened the door to numerous additional questions concerning children of divorce, that need answers and further research.
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Liu, Yonggang. "Patterns and dynamics of ocean circulation variability on the West Florida shelf." [Tampa, Fla] : University of South Florida, 2006. http://purl.fcla.edu/usf/dc/et/SFE0001413.
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Künzle, Philippe. "Building topological maps for robot navigation using neural networks." Thesis, McGill University, 2005. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=82266.
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Robots carrying tasks in an unknown environment often need to build a map in order to be able to navigate. One approach is to create a detailed map of the environment containing the position of obstacles. But this option can use a large amount of memory, especially if the environment is large. Another approach, closer to how people build a mental map, is the topological map. A topological map contains only places that are easy to recognize (landmarks) and links them together.In this thesis, we explore the issue of creating a topological map from range data. A robot in a simulated environment uses the distance from objects around it (range data) and a compass as inputs. From this information, the robot finds intersections, classifies them as landmarks using a neural network and creates a topological map of its environment. The neural network detecting landmarks is trained online on sample intersections. Although the robot evolves in a simulated environment, the ideas developed in this thesis could be applied to a real robot in an office space.
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Birgersson, Anna, and Klara Hellgren. "Texture Enhancement in 3D Maps using Generative Adversarial Networks." Thesis, Linköpings universitet, Datorseende, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-162446.
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In this thesis we investigate the use of GANs for texture enhancement. To achievethis, we have studied if synthetic satellite images generated by GANs will improvethe texture in satellite-based 3D maps. We investigate two GANs; SRGAN and pix2pix. SRGAN increases the pixelresolution of the satellite images by generating upsampled images from low resolutionimages. As for pip2pix, the GAN performs image-to-image translation bytranslating a source image to a target image, without changing the pixel resolution. We trained the GANs in two different approaches, named SAT-to-AER andSAT-to-AER-3D, where SAT, AER and AER-3D are different datasets provided bythe company Vricon. In the first approach, aerial images were used as groundtruth and in the second approach, rendered images from an aerial-based 3D mapwere used as ground truth. The procedure of enhancing the texture in a satellite-based 3D map was dividedin two steps; the generation of synthetic satellite images and the re-texturingof the 3D map. Synthetic satellite images generated by two SRGAN models andone pix2pix model were used for the re-texturing. The best results were presentedusing SRGAN in the SAT-to-AER approach, in where the re-textured 3Dmap had enhanced structures and an increased perceived quality. SRGAN alsopresented a good result in the SAT-to-AER-3D approach, where the re-textured3D map had changed color distribution and the road markers were easier to distinguishfrom the ground. The images generated by the pix2pix model presentedthe worst result. As for the SAT-to-AER approach, even though the syntheticsatellite images generated by pix2pix were somewhat enhanced and containedless noise, they had no significant impact in the re-texturing. In the SAT-to-AER-3D approach, none of the investigated models based on the pix2pix frameworkpresented any successful results. We concluded that GANs can be used as a texture enhancer using both aerialimages and images rendered from an aerial-based 3D map as ground truth. Theuse of GANs as a texture enhancer have great potential and have several interestingareas for future works.
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Yin, Hu Jun. "Self-organising maps : statistical analysis, treatment and applications." Thesis, University of York, 1996. http://etheses.whiterose.ac.uk/14035/.
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This thesis presents some substantial theoretical analyses and optimal treatments of Kohonen's self-organising map (SOM) algorithm, and explores the practical application potential of the algorithm for vector quantisation, pattern classification, and image processing. It consists of two major parts. In the first part, the SOM algorithm is investigated and analysed from a statistical viewpoint. The proof of its universal convergence for any dimensionality is obtained using a novel and extended form of the Central Limit Theorem. Its feature space is shown to be an approximate multivariate Gaussian process, which will eventually converge and form a mapping, which minimises the mean-square distortion between the feature and input spaces. The diminishing effect of the initial states and implicit effects of the learning rate and neighbourhood function on its convergence and ordering are analysed and discussed. Distinct and meaningful definitions, and associated measures, of its ordering are presented in relation to map's fault-tolerance. The SOM algorithm is further enhanced by incorporating a proposed constraint, or Bayesian modification, in order to achieve optimal vector quantisation or pattern classification. The second part of this thesis addresses the task of unsupervised texture-image segmentation by means of SOM networks and model-based descriptions. A brief review of texture analysis in terms of definitions, perceptions, and approaches is given. Markov random field model-based approaches are discussed in detail. Arising from this a hierarchical self-organised segmentation structure, which consists of a local MRF parameter estimator, a SOM network, and a simple voting layer, is proposed and is shown, by theoretical analysis and practical experiment, to achieve a maximum likelihood or maximum a posteriori segmentation. A fast, simple, but efficient boundary relaxation algorithm is proposed as a post-processor to further refine the resulting segmentation. The class number validation problem in a fully unsupervised segmentation is approached by a classical, simple, and on-line minimum mean-square-error method. Experimental results indicate that this method is very efficient for texture segmentation problems. The thesis concludes with some suggestions for further work on SOM neural networks.
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Huusko, S. (Sampsa). "MaaS-palvelualustan tekniset vaatimukset." Master's thesis, University of Oulu, 2017. http://urn.fi/URN:NBN:fi:oulu-201705051686.
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Tässä työssä on kartoitettu MaaS-palvelualustan teknisiä vaatimuksia siitä näkökulmasta, että tällä hetkellä kehitteillä olevat MaaS-taustajärjestelmät olisivat mahdollisimman yhteensopivia eri liikkumispalveluntarjoajien ja reittioppaiden käyttämien aikataulutietojen ja maksujärjestelmien kanssa. Työssä kartoitettiin Suomessa ja ulkomailla jo olemassa olevia MaaS-hankkeita ja liikenteen tietojärjestelmiä. Löydösten perusteella voidaan liikenteen tietojärjestelmien olevan murrosvaiheessa: yhteinäiset standardit ovat vasta muodostumassa, tietojärjestelmät ovat osittain hajaantuneet. Avoimen tiedon ja rajapintojen avaamisen osalta työ on jo aloitettu. Liikennekaari-hankkeen toteutuessa avattavien maksujärjestelmien ja aikataulutietojen määrittelyt ovat teknisesti vasta luonnosasteella. MaaS-taustajärjestelmien kehittäjien, liikkumispalveluntarjoajien ja maksuliikenteen järjestelmien tarjoajien yhteistyö on välttämätöntä helposti yhteensopivien ja skaalautuvien liikenteen palvelujen takaamiseksi. Työssä on myös koostettu Kuusamossa Rukan alueella liikennöivälle SkiBus-linja-autolle GTFS-Static -muotoiset aikataulutiedostot. Aikataulutiedostot on toteutettu Liikenneviraston RAE-työkalulla, joka on tarkoitettu julkisen liikenteen aikataulutiedostojen koostamista varten. Tästä työstä voivat hyötyä esimerkiksi kaupunkien liikennesuunnittelijat, liikennöitsijät, MaaS-palveluiden kehittäjät sekä kaikki sellaiset henkilöt, jotka ovat kiinnostuneita tietämään, kuinka tietotekniikkaa hyödynnetään tällä hetkellä liikenteen palvelullistamiseksiMobility as a Service (MaaS) platforms should be compatible and scalable with systems used by public transport agencies, transport operators, and also with journey planners and different payments systems. In this thesis, the technical requirements of Mobility as a Service- platforms are mapped. Furthermore, national and international MaaS projects and traffic information systems are studied. Based on the findings, traffic information systems are still fragmented and standards are under development. The recent law proposal (2016) by the Ministry of Transport and Communications forces transport providers to provide open public interfaces for payments and schedule data but they aren’t defined technically, yet. To provide good interoperability, collaboration between transport and payment system providers is crucial. As a use case, GTFS-static schedule format files for a bus route operating in the ski center Ruka area and connecting also the city of Kuusamo were created in the experimental section of this thesis. GTFS-files were created with Finnish Transport Agency’s RAE GTFS editor which is a tool for public transport agencies to provide their schedule data. The results of this thesis can be exploited by city planners, developers of MaaS services and people interested in servitization of transport
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Zhong, Cheng. "Generating Contour Maps for Dynamic Fields Monitored by Sensor Networks." Fogler Library, University of Maine, 2008. http://www.library.umaine.edu/theses/pdf/ZhongC2008.pdf.
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Camargo, Francisco Quevedo. "Genotype-phenotype maps for gene networks : from evolution to computation." Thesis, University of Oxford, 2017. http://ora.ox.ac.uk/objects/uuid:57eb4d3e-81c2-43d7-a040-f468abd52597.
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One of the most fundamental and least understood elements of evolution is the mapping between genotype and phenotype. Recent work on genotype-phenotype (GP) maps suggests that these maps show properties which may have important evolutionary implications. These properties include a skewed distribution of genotypes over phenotypes, linear scaling between phenotype robustness and the logarithm of phenotype frequency, and a positive correlation between phenotype robustness and evolvability. However, most of these properties have only been studied for self-assembling systems, such as protein complexes or RNA folding. In this thesis, we ask ourselves if these properties are more general. First, we apply tools from algorithmic information theory to a wide class of inputoutput maps, of which GP maps are a subset. We find that these maps show a strong bias towards simple phenotypes, a pattern known as simplicity bias. We also define a matrix map of tunable complexity, with which we can study the conditions under which simplicity bias is present. Next, we investigate multiple models of GP maps for gene regulatory networks (GRNs). These include Boolean threshold networks, where we fix the strength of gene interactions, while varying the network topology, as well as systems of differential equations, where we fix the network topology while varying interaction strengths. For both modelling frameworks, the GRN GP maps exhibit all the structural properties found in the literature, as well as simplicity bias. We also find that the number of genotypes mapping to the wild-type phenotypes for various GRNs is unusually large, and argue that this is evidence that the structure of the GP map plays an important role in determining evolutionary outcomes. Finally, we return to more general input-output maps, and show that in addition to simplicity bias these maps also present randomness deficiency, that is, their output spectrum is less complex than expected. We argue that this additional property combines with simplicity bias in GP maps, and more generally, in input-output maps, and suggest a general trend towards simplicity in nature.
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Larsson, Sebastian, and Ossian Petri. "Content evaluation of StarCraft maps using Neuroevolution." Thesis, Blekinge Tekniska Högskola, Institutionen för kreativa teknologier, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-11684.
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Context. Games are becoming larger and the amount of assets required is increasing. Game studios turn toward procedural generation to ease the load of asset creation. After the game is released the studios want to extend the longevity of their creation. One way of doing this is to open up the game for community created add-ons and assets or utilize some procedural content generation. Both community created assets and procedural generation comes with a classification problem to filter out the undesirable content. Objectives. This thesis will attempt to create a method to evaluate community-generated StarCraft maps with the help of machine learning. Methods. Manually extracted metrics from StarCraft maps and ratings from community repositories. This data is used to train neural networks using NeuroEvolution of Augmenting Topologies (NEAT). The method will be compared with Sequential Minimal Optimization (SMO) and ZeroR. Results and Conclusions. The problem turned out to be more difficult than initially thought. The results using NEAT are marginally better than SMO and ZeroR. The suspected reason for this is insufficient input data and/or bad input parameters. Further experimentation could be conducted with deep learning to try to find a suitable solution for this problem.
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Gautam, S. Vijay. "Performance Analysis Of A Variation Of The Distributed Queueing Access Protocol." Thesis, Indian Institute of Science, 1995. http://hdl.handle.net/2005/149.
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"A distributed queueing Medium Access Control (MAC) protocol is used in Distributed Queue Dual Bus (DQDB) networks. A modified version of the MAC protocol was proposed by R.R. Pillai and U. Mukherji in an attempt to overcome some of the shortcomings of the DQDB MAC protocol. They analyzed the performance of the system for Bernoulli arrivals and for large propagation delays between the nodes. We extend the performance analysis of the modified MAC protocol for a DQDB type of Network. The parameter of interest to us is the bus access delay. This has two components, viz., the request bus access delay and the data bu6 access delay. We use the model at the request point at node and present methods to evaluate the delay experienced in such a model. The model is an n-priority ./D/l queue with D vacations (non-preemptive priority) where n is the number of nodes sending requests on the request bus for transmission on the data bus. The methods presented help to evaluate the request bus access delay when the arrivals at each node are Markovian Arrival Processes (MAPs). The algorithms for evaluating the mean request bus access delay are based on matrix geometric techniques. Thus, one can use the algorithms developed in the literature to solve for the finite buffers case too. This model, for the request bus access delay, holds irrespective of the propagation delay between the nodes.
We also evaluate the inter-departure time of class 1 customers and virtual customers in a 2-priority M/G/l system with G vacations (non-preemptive priority). In the case of Poisson arrivals at all the nodes, we would have a 2-priority M/D/l system with D vacations (non-preemptive priority). We thus evaluate the inter-arrival time of the free slots on the data bus as seen by Node 2. Note that this is independent of the number of active nodes in the network
We then develop methods to evaluate the mean data bus access delay experienced by the customers at Node 2 in a three-node network with 2 nodes communicating with the third when the propagation delay between the nodes is large. We consider the case of finite Local Queue buffers at the two nodes. Using this assumption we arrive at process of arrivals to the Combined Queue and the process of free slots on the data bus to be Markov Modulated Bernoulli processes. The model at the combined queue at Node 2 then has a Quasi Birth-Death evolution. Thus, this system is solved by using the Ramaswami-Latouche algorithm. The stationary probabilities are then used to evaluate the mean data bus access delay experienced at Node 2. The finite buffer case of this system can be solved by G.Wi Stewart's algorithm. The method in modelling the system and the results are presented in detail for Poisson arrivals. The extension of this to more complex processes is also explained. We encounter in the analysis an explosion of the state-space of the system. We try to counter this by considering approximations to the process of free slots on the data bus. The approximations considered are on the basis of what are known as Idealized Aggregates. The performance of the approximation is also detailed. It works very well under low and moderate load but underestimates the mean delay under heavy load.
Thereafter, we discuss the performance of the system with reference to the mean of the access delay and the standard deviation of the access delay under varying traffic at the two nodes. For this part we use simulation results to discuss the performance. The comparison between the performance measures at both the nodes is also done.
Then we develop methods/techniques to understand the performance of the system when we have finite propagation delays between the nodes. We concentrate on the 3-node problem and calculate performance bounds based on linear programs. This is illustrated in detail for Bernoulli arrivals for the case of 1 slot propagation delay between the nodes as well as for the case of 2 slots propagation delay. The performance of the bounds obtained is also detailed. The presence of an idling system at the combined queue of Node 2 makes the bounds somewhat loose. Finally, we discuss the performance of the system with reference to the mean access delay and the standard deviation of the access delay under varying load on the system. Again, we rely on simulation studies.
Finally, we study the performance of the system as a multiplexer. For this, we restrict the traffic to Markov Modulated Processes (or those which would satisfy the Gartner-Ellis Theorem requirements). The traffic is characterized by what are known as Envelope Processes - Lower and Upper. The class of processes which satisfy the conditions of the
Gartner-Ellis theorem come under the category where both the Envelope Processes exist and the Minimum Envelope Rate and the Maximum Lower Envelope Rate are the same. We use the system evolution equations at the combined queue at any node to develop relations between the various input and output processes. First, this is done for a. system of this kind, in isolation. Then, we consider this system as a part of the modified protocol and present relations, among the various input and output processes, which are specific to the modified protocol. The possible use of all of the above to do Admission Control at the entry point to the Asynchronous Transfer Mode (ATM) network is also presented.
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Obeid, Naji. "MIM-Logic : a logic for reasoning about molecular interaction maps." Toulouse 3, 2014. http://thesesups.ups-tlse.fr/2527/.
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Les séries de réactions biochimiques apparaissant au cœur d'une cellule forme ce qu'on appelle des voies métaboliques. La plupart de ces voies sont très complexes impliquant un grand nombre de protéines et d'enzymes. Une représentation logique de ces réseaux contribue au raisonnement à propos de ces voies en général, allant du fait de répondre à certaines questions, compléter des arcs et nœuds manquant, et trouver des incohérences. Dans ce contexte on propose un nouveau model logique basé sur un fragment de logique de premier ordre capable de décrire les réactions apparaissant dans des Molecular Interaction Maps. On propose aussi une méthode de déduction automatique efficace capable de répondre aux questions par déduction pour prédire les résultats des réactions et par abduction pour trouver les états des protéines et de leurs réactions. Cette méthode automatique est basée sur une procédure de traduction qui élimine les quantificateurs des formules de logique premier ordreThe series of biochemical reactions that occur within a cell form what we call Metabolic Pathways. Most of them can be quite intricate and involve many proteins and enzymes. Logical representations of such networks can help reason about them in general, where the reasoning can range from answering some queries, to completing missing nodes and arcs, and finding inconsistencies. This work proposes a new logical model based on a fragment of first-order logic capable of describing reactions that appear in a Molecular Interaction Maps. We also propose an efficient automated deduction method that can answer queries by deduction to predict reaction results or by abductive reasoning to find reactions and protein states. This automated deduction method is based on a translation procedure that transforms first-order formulas into quantifier free formulas
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Procházka, Tomáš. "Využití neuronových sítí pro klasifikaci alternací vlny T." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2008. http://www.nusl.cz/ntk/nusl-217219.
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This thesis deals with analysis of T-wave Alternans (TWA), periodical changes of T wave in ECG signal. Presence of these alternans may predict higher risk of sudden cardiac death. From the several possible ways of TWA classification, the training algorithms of self organizing maps are used in this thesis. Result of the thesis is a program, which in the first step detects QRS complexes in the signal. Then, in the next step, gained reference points are used for T-waves detection. Detected waves are represented by a vector of significant points, which is used as an input for artificial neural network. Final output of the program is a decision about presence of TWA in the signal and its rate.
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Chawdhary, Adit. "DevSOM: Developmental Learning in Self Organizing Feature Maps." University of Cincinnati / OhioLINK, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1623164888614564.
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Correia, Mauro Vicentini. "Redes neurais e algoritmos genéticos no estudo quimiossistemático da família Asteraceae." Universidade de São Paulo, 2010. http://www.teses.usp.br/teses/disponiveis/46/46135/tde-12082013-153222/.
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No presente trabalho duas metodologias da área de inteligência artificial (Redes Neurais e Algoritmos Genéticos) foram utilizadas para realizar um estudo Quimiossistemático da família Asteraceae. A família Asteraceae é uma das maiores famílias entre as Angiospermas, conta com aproximadamente 24.000 espécies. As espécies da família produzem grande diversidade de metabólitos secundários, entre os quais merecem destaque os terpenóides, poliacetilenos, flavonóides e cumarinas. Para um melhor entendimento da diversidade química da família construiu-se um Banco de Dados com as ocorrências de doze classes de metabólitos (monoterpenos, sesquiterpenos, sesquiterpenos lactonizados, diterpenos, triterpenos, cumarinas, flavonóides, poliacetilenos, benzofuranos, benzopiranos, acetofenonas e fenilpropanóides) produzidos pelas espécies da família. A partir desse banco três diferentes estudos foram realizados. No primeiro estudo, utilizando os mapas auto-organizáveis de Kohonen e o banco de dados químico classificado segundo duas das mais recentes filogenias da família foi possível realizar com sucesso separações de tribos e gêneros da família Asteraceae. Também foi possível indicar que a informação química concorda mais com a filogenia de Funk (Funk et al. 2009) do que com a filogenia de Bremer (Bremer 1994, 1996). No estudo seguinte, onde se objetivou a criação de modelos de previsão dos números de ocorrências das doze classes de metabólitos, utilizando o perceptron de múltiplas camadas com algoritmo de retropropagação de erro, o resultado foi insatisfatório. Apesar de em algumas classes de metabólitos a fase de treino da rede apresentar resultados satisfatórios, a fase de teste mostrou que os modelos criados não são capazes de realizar previsão para dados aos quais eles não foram submetidos na fase de treino, e portanto não são modelos adequados para realizar previsões. Finalmente, o terceiro estudo consistiu na criação de modelos de regressão linear utilizando como método de seleção de variáveis os algoritmos genéticos. Nesse estudo foi possível indicar que os monoterpenos e os sesquiterpenos são bastante relacionados biossinteticamente, também foi possível indicar que existem relações biossintéticas entre monoterpenos e diterpenos e entre sesquiterpenos e triterpenosIn this study two methods of artificial intelligence (neural network and genetic algorithms) were used to work out a Chemosystematic study of the Asteraceae family. The family Asteraceae is one of the largest families among the Angiosperms, having about 24,000 species. The species of the family produce a large diversity of secondary metabolites, and some worth mentioning are the terpenoids, polyacetylenes, flavonoids and coumarins. For a better understanding of the chemical diversity of the family a database was built up with the occurrences of twelve classes of metabolites (monoterpenes, sesquiterpenes, lactonizadossesquiterpenes, diterpenes, triterpenes, coumarins, flavonoids, polyacetylenes, Benzofurans, benzopyrans, acetophenones and phenylpropanoids) produced by species of the family. From this database three different studies were conducted. In the first study, using the Kohonen self-organized map and the chemical data classified according to two of the most recent phylogenies of the family, it was possible to successfully separatethe tribes and genera of the Asteraceae family. It was also possible to indicate that the chemical information agrees with the phylogeny of Funk (Funk et al. 2009) than with the phylogeny of Bremer (Bremer 1994, 1996). In the next study, which aims at creating models to predict the number of occurrences of the twelve classes of metabolites using multi-layer perceptron with backpropagation algorithm error, the result was found unsatisfactory. Although in some classes of metabolites the training phase of the network has satisfactory results, the test phase showed that the models created are not able to make prevision for data to which they were submitted in the training phase and thus are not suitable models for predictions. Finally, the third study was the creation of linear regression models using a genetic algorithm method of variable selection. This study could indicate that the monoterpenes and sesquiterpenes are closely related biosynthetically, and was also possible to indicate that there are biosynthetic relations between monoterpenes and diterpenes and between sesquiterpenes and triterpenes
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Santo, Anna Ruth. "A Human-Centered Approach to Designing an Invasive Species Eradication Program." Thesis, Virginia Tech, 2015. http://hdl.handle.net/10919/52562.
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The increasing scope and speed of biological invasions around the world is a major concern of the modern environmental conservation movement. Although many ecological impacts of biological invasions are still not well understood, there is a general consensus that exotic, invasive species are a primary driver of extinctions globally. By altering ecosystem structure and function, invasive species also affect human quality of life; however, not all impacts lead to negative outcomes.
Given that invasive species have diverse impacts on society, their management in human-dominated landscapes is a wicked problem wherein the resolution is as much an issue of social value as technical capacity. The purpose of my research was to understand the propensity for engaging private landowners in an effort to eradicate an invasive species on an inhabited island. Specifically, I investigated private landowner perspectives on eradicating the North American beaver (Castor canadensis) from the Tierra del Fuego (TDF) island archipelago in Argentina and Chile. The beaver was introduced in 1946 and has since become a central conservation issue due to its long-lasting changes to local hydrology, nutrient cycling, riparian vegetation, food webs, and aquatic and terrestrial species assemblages.
Because eradication requires near complete cooperation from stakeholders and no research had been conducted to understand the perspectives or willingness of private landowners to cooperate, my objectives were to: 1) characterize the links private landowners make between the presence of beavers and impacts to the ecosystem services in their riparian areas, and 2) explore the role of a market-based incentive program to increase landowner cooperation in eradication efforts.
Through semi-structured interviews, I elicited landowner mental models of how beavers impact the ecosystem services they receive from their riparian lands. I found that TDF ranchers prioritized provisioning ecosystem services, and held diverse and idiosyncratic beliefs about how beavers influence these outcomes. TDF ranchers may not recognize the beaver as a highly salient problem because they do not connect them to reductions in ecosystem services that are important to them. Among those who do perceive beavers affecting important ecosystem services, there is no clear, unified understanding of how the beavers disturb the ecosystem and key ecosystem services.
Additionally, in a broadly administered survey, I used a factorial vignettes to examine the role of program structure and other program-related factors on landowners' willingness to participate in a voluntary eradication program. Overall, landowners were willing to cooperate in an incentive program to eradicate beavers. They were positively motivated by greater financial compensation, an increased expectation that the program would be successful, and the program assuming full responsibility for its implementation. Other factors returned mixed results indicating that further research may be required.
In diverse, human-inhabited, and privately-owned landscapes, conservation requires collective action—i.e., the high threshold of participation needed for eradication to be achieved. Understanding the knowledge systems that cause landowners to perceive value or risk serves as a first step in understanding behaviors, and can also serve as a framework for crafting more effective outreach, as current communication about the beaver and the proposed eradication may not resonate with private landowners. Further, barriers to inaction can be overcome by understanding landowner needs and how program-related factors influence the potential for cooperation.
In sum, by putting human needs at the forefront of program design, conservation planners can better understand stakeholder perspectives, reduce barriers to participation, and ultimately increase cooperation and improve conservation outcomes.Master of Science
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Chen, Ye. "Fuzzy Cognitive Maps: Learning Algorithms and Biomedical Applications." University of Cincinnati / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1423581705.
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Ikhalia, Ehinome. "A malware threat avoidance model for online social network users." Thesis, Brunel University, 2017. http://bura.brunel.ac.uk/handle/2438/16039.
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The main purpose of this thesis is to develop a malware threat avoidance model for users of online social networks (OSNs). To understand the research domain, a comprehensive and systematic literature review was conducted and then the research scope was established. Two design science iterations were carried out to achieve the research aim reported in this thesis. In the first iteration, the research extended the Technology Threat Avoidance Theory (TTAT) to include a unique characteristic of OSN - Mass Interpersonal Persuasion (MIP). The extended model (TTAT-MIP), focused on investigating the factors that needs to be considered in a security awareness system to motivate OSN users to avoid malware threats. Using a quantitative approach, the results of the first iteration suggests perceived severity, perceived threat, safeguard effectiveness, safeguard cost, self-efficacy and mass interpersonal persuasion should be included in a security awareness system to motivate OSN users to avoid malware threats. The second iteration was conducted to further validate TTAT-MIP through a Facebook video animation security awareness system (referred in this thesis as Social Network Criminal (SNC)). SNC is a Web-based application integrated within Facebook to provide security awareness to OSN users. To evaluate TTAT-MIP through SNC, three research techniques were adopted: lab experiments, usability study and semi-structured interviews. The results suggest that participants perceived SNC as a useful tool for malware threat avoidance. In addition, SNC had a significant effect on the malware threat avoidance capabilities of the study participants. Moreover, the thematic analysis of the semi-structured interviews demonstrated that the study participants' found SNC to be highly informative; persuasive; interpersonally persuasive; easy to use; relatable; fun to use; engaging; and easy to understand. These findings were strongly related to the constructs of TTAT-MIP. The research contributes to theory by demonstrating a novel approach to design and deploy security awareness systems in a social context. This was achieved by including users' behavioural characteristic on the online platform where malware threats occur within a security awareness system. Besides, this research shows how practitioners keen on developing systems to improve security behaviours could adopt the TTAT-MIP model for other related contexts.