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Dissertations / Theses on the topic 'Trait decay'

Author: Grafiati

Published: 22 June 2024

Last updated: 31 July 2025

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1

Defendini, Hélène. "Bases génétiques et conséquences évolutives de la perte de sexe dans le groupe des pucerons." Electronic Thesis or Diss., Rennes, Agrocampus Ouest, 2023. http://www.theses.fr/2023NSARA094.

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La reproduction sexuée est considérée comme le mode de reproduction ancestral des eucaryotes, mais elle été perdue à plusieurs reprises dans de nombreux taxons. Comprendre les mécanismes par lesquels les lignées asexuées apparaissent et persistent dans le temps reste un défi majeur de la biologie évolutive. Au cours de ma thèse, j'ai étudié les bases génétiques ainsi que les conséquences évolutives de la perte du sexe chez les pucerons, un groupe qui présente un polymorphisme de reproduction. Le mode de reproduction ancestral des pucerons est la parthénogenèse cyclique (CP, une alternance de p

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2

Minbashi, Niloofar. "Applying Data Analytics to Freight Train Delays in Shunting Yards." Licentiate thesis, KTH, Transportplanering, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-284672.

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The European Commission has foreseen a modal share of 30% by 2030 for rail freight transport. To achieve this increase in the modal share, enhanced reliability of rail freight services is required. Optimal functioning of shunting yards is one of the areas that can improve this reliability. Shunting yards are large areas allocated to reassemble freight trains for dispatching to new destinations. Their productivity has a direct impact on the overall performance of a rail freight network. Therefore, analysing and modelling of departure deviations from shunting yards are required to enhance the in

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3

Sundqvist, Frej. "Developing Markov chain models for train delay evolution in winter climate." Thesis, Umeå universitet, Institutionen för fysik, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-179526.

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The traffic on Swedish railways is increasing and punctuality is of important matter for both passenger and freight trains. The problem of modeling train delay evolution is complex since conflicts between trains can occur and since a delay can have a wide variety of causes. Swedish railways faces in addition harsh winter climate. Studies of railways in Scandinavia have shown that harsh winter climate decreases the punctuality of trains. This thesis work investigates the possibilities of modeling train delay evolution as continuous time Markov processes and which specific modeling choices are p

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4

Fakhraei, Roudsari Farzad. "Spatial, temporal and size distribution of freight train time delay in Sweden." Thesis, KTH, Trafik och logistik, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-59708.

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Delays and cancelled trains are often described as a problem for companies that transport goods by rail. Lack of reliability of freight trains is seen as a disadvantage compared to other modes. To date there has been limited quantitative information in Sweden about the size and the structure of the problem of trains not arriving in time. In this thesis information for two years, 2008 and 2009 is available that enable us to do the analysis of distribution on a spatial, temporal and seize-frequency scale. Since the spatial and frequency-size distributions describe the vulnerability of a transpor

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5

Karthikeyan, Arun Kumar, and Praveen Kumar Mani. "Visual and Analytical Support for Real-time Evaluation of Railway Traffic Re-scheduling Alternatives During Disturbances." Thesis, Blekinge Tekniska Högskola, Sektionen för datavetenskap och kommunikation, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-4299.

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Disturbances in the railway network are frequent and to some extent, inevitable. When this happens, the traffic dispatchers need to re-schedule the train traffic and there is a need for decision support in this process. One purpose of such a decision support system would be to visualize the relevant, alternative re-scheduling solutions and benchmark them based on a set of relevant train traffic attributes which quantify the effects of each solution. Currently, there are two research projects financed by the Swedish Transport Administration (i.e. Trafikverket) which focus on developing decision

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6

Nilsson, Robert, and Kim Henning. "Predictions of train delays using machine learning." Thesis, KTH, Hälsoinformatik och logistik, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-230224.

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Train delays occur on a daily basis in the commuter rail of Stockholm. This means that the travellers might become delayed themselves for their particular destination. To find the most accurate method for predicting train delays, the machine learning methods decision tree with and without AdaBoost and neural network were compared with different settings. Neural network achieved the best result when used with 3 layers and 22 neurons in each layer. Its delay predictions had an average error of 122 seconds, compared to the actual delay. It might therefore be the best method for predicting train d

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7

Granlöf, Markus. "A study of the effects of winterclimate and atmospheric icing onhigh-speed passenger trains." Thesis, Umeå universitet, Institutionen för matematik och matematisk statistik, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-171868.

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Harsh winter climate causes various problems for both the public andprivate sector in Sweden, especially in the northern part and the railway industryis no exception. This master thesis project covers an investigation of the eects ofthe winter climate and a phenomena called atmospheric icing on the performance ofthe train in a region called the Botnia-Atlantica region. The investigation was donewith data over a short period January-February 2017 with simulated weather datafrom the Weather research and forecast model that was compared with the periodOctober - December 2016. The investigation on

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8

Chin, Elizabeth D. "Symptom Experience and Treatment Delay during Acute Exacerbation of Chronic Obstructive Pulmonary Disease: A Dissertation." eScholarship@UMMS, 2012. https://escholarship.umassmed.edu/gsn_diss/30.

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Chronic obstructive pulmonary disease (COPD) is a major health problem in the United States. Acute exacerbations of COPD are primarily responsible for the physical, psychological and economic burden of this disease. Early identification and treatment of exacerbations is important to improve patient and healthcare outcomes. Little is known about how patients with COPD recognize an impending exacerbation and subsequently decide to seek treatment. The purpose of this qualitative descriptive study was to explore and describe symptom recognition and treatment delay in individuals experiencing an ac

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9

Newhall, William George. "Wideband Propagation Measurement Results, Simulation Models, and Processing Techniques for a Sliding Correlator Measurement System." Thesis, Virginia Tech, 1997. http://hdl.handle.net/10919/35678.

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Radio wave propagation measurements provide a way to accurately and reliably characterize environments to assist in the development and optimization of wireless communication systems. As digital radio systems occupy wider bandwidths and use multipath signal combining to enhance quality of service, knowledge of time dispersion and the multipath structure of radio channels become increasingly important. The wideband measurement system presented herein provides a practical means to precisely measure the delays and strengths of individual multipath components which arrive at a radio receiver. <

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10

Oharek, Aleš. "Zvyšování bezpečnosti a výkonnosti navigace dopravních letadel po trati letu." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2009. http://www.nusl.cz/ntk/nusl-228554.

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Thesis presents description of the air traffic safety, efficiency, capacity and preferences of navigation equipment. Those aspect are further used to suggestion of future advancement airspace, which occur during almost all phases of the flight.

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11

Coelho, Mônica Andrigo Moreira de Ulhoa. "Tradução e adaptação transcultural da escala de avaliação da primeira infância para bebês e crianças DECA I/T (Devereux Early Childhood Assessment for Infants And Toddlers)." Pontifícia Universidade Católica de São Paulo, 2017. https://tede2.pucsp.br/handle/handle/20514.

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Submitted by Filipe dos Santos (fsantos@pucsp.br) on 2017-10-19T12:01:37Z No. of bitstreams: 1 Mônica Andrigo Moreira de Ulhoa Coelho.pdf: 2869552 bytes, checksum: e62b5c2bb3ae86f54aac6a298dd0f093 (MD5)<br>Made available in DSpace on 2017-10-19T12:01:39Z (GMT). No. of bitstreams: 1 Mônica Andrigo Moreira de Ulhoa Coelho.pdf: 2869552 bytes, checksum: e62b5c2bb3ae86f54aac6a298dd0f093 (MD5) Previous issue date: 2017-09-29<br>Fundação São Paulo - FUNDASP<br>The subject of this master´s dissertation is related to early childhood and resilience in infants (four weeks to 18 months old) and todd

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12

Mell, Hugo. "Fast-slow strategies in human populations : applying insights from life history theory to explain patterns of interindividual variation." Thesis, Paris Sciences et Lettres (ComUE), 2018. http://www.theses.fr/2018PSLEE074.

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Des gradients sociaux ont été documentés pour une variété de comportements individuels. Au sein des pays occidentaux par exemple, les personnes ayant un statut socio-économique plus bas ont tendance à investir moins dans leur éducation, à fumer davantage, sont plus susceptibles de souffrir d'obésité et plus enclines à prendre des risques dans des contextes économiques. Ainsi, être exposé à des conditions de vie précaire semble engendrer une série de comportements, covariant de manière systématique. Ce syndrome comportemental a été principalement interprété comme le produit de déficits cognitif

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13

Mihajlo, Jecković. "Ultrazvučna dijagnostika upalnih oboljenja creva u komparaciji sa magnetnom rezonancom u dečjem i adolescentnom dobu." Phd thesis, Univerzitet u Novom Sadu, Medicinski fakultet u Novom Sadu, 2016. http://www.cris.uns.ac.rs/record.jsf?recordId=100637&source=NDLTD&language=en.

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UVOD: Hronične inflamatorne bolesti se ispoljavaju kao Kronova bolest i ulcerozni kolitis. Njihova značajnost ogleda se u hronicitetu kao i u stepenu u kom ograničavaju rast i razvoj dece i omladine. Brojne su posledice ovih oboljenja: dugotrajno izostajanje sa nastave, ograničavanje životnih aktivnosti i pojava komplikacija koje neretko zahvataju i druge organske sisteme. Etiologija je i dalje nerazja&scaron;njenja navodeći kao značajan hronični inflamatorni proces u genetski uslovljenih pojedinaca a provociranih nekim infektivnim agensom. Početkom 21. veka genetska istraživanja su otkrila os

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14

Milliet, De Faverges Marie. "Développement et implémentation de modèles apprenants pour l’exploitation des grandes gares." Electronic Thesis or Diss., Paris, CNAM, 2020. http://www.theses.fr/2020CNAM1283.

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Cette thèse traite de l’incertitude et de la robustesse dans les problèmes de d´décision, avec le cas d’application des affectations de quais en gare en cas de retards. Une m´méthodologie en deux parties est proposée pour aborder ce problème. Dans un premier temps, les archives de données de retards sont utilisées pour construire des modèles de prédiction de distribution de probabilités conditionnellement aux valeurs d’un ensemble de variables explicatives. Une m´méthodologie de validation et d’évaluation de ces prédictions est mise en place afin d’assurer leur fiabilité pour de la prise de d´

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15

Grasreiner, Sebastian. "Combustion modeling for virtual SI engine calibration with the help of 0D/3D methods." Doctoral thesis, Technische Universitaet Bergakademie Freiberg Universitaetsbibliothek "Georgius Agricola", 2012. http://nbn-resolving.de/urn:nbn:de:bsz:105-qucosa-90518.

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Spark ignited engines are still important for conventional as well as for hybrid power trains and are thus objective to optimization. Today a lot of functionalities arise from software solutions, which have to be calibrated. Modern engine technologies provide an extensive variability considering their valve train, fuel injection and load control. Thus, calibration efforts are really high and shall be reduced by introduction of virtual methods. In this work a physical 0D combustion model is set up, which can cope with a new generation of spark ignition engines. Therefore, at first cylinder ther

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16

Lin, Tzu-Ya, and 林姿雅. "Development of Delay-Based Base Train Equivalents for Multiple-Type Train Operations." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/72685302729051998977.

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碩士<br>國立臺灣大學<br>土木工程學研究所<br>100<br>A conventional railway system usually has multiple types of trains with various service patterns operating on the same line. This difference in train characteristics lead to different capacity impacts on the system. Recently a new concept was proposed to use Base train equivalent (BTE) standardize different train type into base train; this concept is similar to Passenger car equivalent (PCE) on highway. By convert these non-base trains to a standardized unit we call the convert volume as base train units (BTU). However, previous study focuses on the developme

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17

"Establishing a Biomarker of Cellular Aging for Mesenchymal Stem Cells and Investigating Their Regenerative Potential." Tulane University, 2019.

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18

Hsin-IChen and 陳心一. "Long Distance Train Delay Prediction: Evidence from Taiwan Railway System." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/62617643261656329122.

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碩士<br>國立成功大學<br>交通管理學系碩博士班<br>98<br>Delay of railway trains is highly affecting reliability of the system, and has significant negative impact on customers' satisfaction. Simulation models often used in previous research and in practice to predict the train delay; due to the growth of the scale of system, it turned to be too costly to develop on such problem. This research suggesting an approach on predicts train delay in the short term by linear model and neural network. With the train operation data of Taiwan Railway Administration for three month, we build several models on predicting weat

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19

Lin, Yu-Min, and 林育民. "Exploring the Reasons of Train Delay: A Case Study of Tilting Train of Taiwan Railways Administration." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/4wneqn.

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碩士<br>國立宜蘭大學<br>應用經濟與管理學系經營管理碩士班<br>104<br>Railway transport require precise calculation and careful planning. Therefore system reliability is an important performance criteria. Railway system is a close system, thus if delay occur, other trains might also be affected, a form of “chain effect”. Taiwan Railways Administration (TRA) tilting train delay data were collected and analyzed in this study. Train delay can divided into: station delay, train delay, route operation delay and other delay. After discovered main issue of train delay occurrence, this study provide suggestions for train delay

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20

Huang, Pei-Tzu, and 黃佩慈. "Reliability Evaluation of a Multistate Railway Transportation Network with Train Delay." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/h73c9x.

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碩士<br>國立臺灣科技大學<br>工業管理系<br>107<br>In order to relieve working pressure and daily hustle, tourism plays an indispensable role in people’s lives. For most travelers, railway transportation is the primary conveyance because of its convenience and cost-effective. Accordingly, it’s difficult to provide lots of travelers with train service, especially on holidays and special festivals. Significantly, to measure whether the railway transportation system can meet travelers’ requirements, this thesis focuses on investigating the network reliability of a railway transportation system from a travel agenc

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21

CHANG, YU-WEI, and 張祐瑋. "The impact of personal traits, age and domain knowledge on Decoy effect." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/70667524541503594317.

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碩士<br>國立臺北大學<br>國際企業研究所<br>104<br>The needs of people are various and unique, in order to meet the needs, researchers believe that the various sorts and varieties of selection can satisfies more widely of needs. However, Decoy Effect (a phenomenon that an option added increases the favorable perceptions of similar, but superior, items in the choice set) indicate that the preference of people can be changed by adding a decoy option. Everyone has different thoughts even they get the same message, the aims of the thesis are to know how consumers react to decoy effect; we want to know the impact o

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Wu, Nan-Lin, and 吳南霖. "Roles of TRAIL and decoy receptor 3 in epidermal keratinocyte terminal differentiation and inflammatory skin diseases." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/26652209456456108051.

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博士<br>國立臺灣大學<br>藥理學研究所<br>101<br>Skin provides the primary barrier to prevent excessive water loss and protect against the external insults and invasion of pathogens. The homeostasis of normal skin is maintained by the balance between continuous replenishment of proliferating keratinocytes and well-controlled cell death. Cornification, the process of terminal differentiation of epidermal keratinocytes, is a special form of programmed cell death in skin and distinct from apoptotic cell death. These terminally differentiated, dead keratinocytes construct the outermost cornified layer, which is t

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Huan-Kuang, Chang, and 張煥光. "Analytic Time Delay Study of Train Failure Treatment Mode for MRT System - A Case Study of Metro Taipei." Thesis, 2003. http://ndltd.ncl.edu.tw/handle/93694150793715546417.

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碩士<br>國立臺灣科技大學<br>管理研究所<br>91<br>The major purpose of this dissertation is to clarify the train failure treatment procedure and delay time. Based on the system concept, FMEA method, and comprehensive MRT system we induced 8 modes of train failure treatment. Based on the work and time study we developed the optimistic, average, pessimism time standards for train subsystems. Through the case study of Metro Taipei and SPSS statistic analysis we summarized finding and suggestions of the correlated factors as environment, aging, human error, equipment, time value, operation for continuous improveme

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Manitz, Juliane. "Statistical Inference for Propagation Processes on Complex Networks." Doctoral thesis, 2014. http://hdl.handle.net/11858/00-1735-0000-0022-5F38-B.

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Die Methoden der Netzwerktheorie erfreuen sich wachsender Beliebtheit, da sie die Darstellung von komplexen Systemen durch Netzwerke erlauben. Diese werden nur mit einer Menge von Knoten erfasst, die durch Kanten verbunden werden. Derzeit verfügbare Methoden beschränken sich hauptsächlich auf die deskriptive Analyse der Netzwerkstruktur. In der hier vorliegenden Arbeit werden verschiedene Ansätze für die Inferenz über Prozessen in komplexen Netzwerken vorgestellt. Diese Prozesse beeinflussen messbare Größen in Netzwerkknoten und werden durch eine Menge von Zufallszahlen beschrieben. Alle vorge

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Conte, Carla. "Identifying dependencies among delays." Doctoral thesis, 2008. http://hdl.handle.net/11858/00-1735-0000-000D-F124-2.

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