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Thèses sur le sujet « Cycle cover »

Auteur : Grafiati

Publié le 10 mars 2023

Mis à jour le 31 juillet 2025

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1

Coop, Lisa Jane. "The diurnal cycle of cloud cover over southern and central Africa." Master's thesis, University of Cape Town, 2008. http://hdl.handle.net/11427/4838.

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Includes abstract.<br>Includes bibliographical references (leaves 113-119).<br>The current understanding of the temporal and spatial distribution of clouds over southern and central Africa is poor and the regional processes governing cloud occurrence is only weakly understood. This study seeks to improve the current understanding of cloud diurnal variability over this region by providing a base-line diurnal climatology of lowlevel, mid-level and high-level cloud cover. Diurnal variations of cloudiness are examined using ten years of cloud data from latest version of the International Satellite

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2

Hägglund, Jonas. "Snarks : Generation, coverings and colourings." Doctoral thesis, Umeå universitet, Institutionen för matematik och matematisk statistik, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-53337.

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For a number of unsolved problems in graph theory such as the cycle double cover conjecture, Fulkerson's conjecture and Tutte's 5-flow conjecture it is sufficient to prove them for a family of graphs called snarks. Named after the mysterious creature in Lewis Carroll's poem, a \emph{snark} is a cyclically 4-edge connected 3-regular graph of girth at least 5 which cannot be properly edge coloured using three colours. Snarks and problems for which an edge minimal counterexample must be a snark are the central topics of this thesis. The first part of this thesis is intended as a short introduct

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Couedel, Antoine. "Analysis of performances of crucifers-legumes cover crop mixtures to provide multiple-ecosystem services." Thesis, Toulouse, INPT, 2018. http://www.theses.fr/2018INPT0097/document.

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Les cultures intermédiaires multi-services (CIMS) implantées en interculture entre deux cultures de rente permettent de produire de nombreux services écosystémiques. Parmi les familles d’espèces utilisées comme CIMS, les crucifères réduisent efficacement la lixiviation de nitrate et de sulfate en captant l’azote (N) et le soufre (S) minéral du sol (services de piège à N et à S). Les crucifères ont aussi la capacité de contrôler les pathogènes via des composés biocides issus de l’hydrolyse de métabolites secondaires appelés glucosinolates (GSL). L’objectif de nos travaux de recherche est d’éval

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4

Germer, Sonja. "Near-surface hydrology and hydrochemistry under contrasting land-cover." Phd thesis, Universität Potsdam, 2008. http://opus.kobv.de/ubp/volltexte/2008/1904/.

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Human transformation of the Earth’s land surface has far-reaching and important consequences for the functioning of hydrological and hydrochemical processes in watersheds. In nowadays land-use change from forest to pasture is a major issue in particular in the tropics. A sustainable management of deforested areas requires an in-depth understanding of the water and nutrient cycle. On this basis we compared the involved hydrological pathways for rainfall to reach streams and the nutrient budgets of a tropical rainforest and a pasture. In addition we studied the links of hydrochemical differences

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Valayamkunnath, Prasanth. "Understanding the Role of Vegetation Dynamics and Anthropogenic induced Changes on the Terrestrial Water Cycle." Diss., Virginia Tech, 2019. http://hdl.handle.net/10919/105061.

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The land surface and atmosphere interact through complex feedback loops that link energy and water cycles. Effectively characterizing these linkages is critical to modeling weather and climate extremes accurately. Seasonal variability in vegetation growth and human-driven land cover changes (LCC) can alter the biophysical properties of the land surface, which can in turn influence the water cycle. We quantified the impacts of seasonal variability in vegetation growth on land surface energy and water balances using ecosystem-scale eddy covariance and large aperture scintillometer observations.

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6

Lytle, William. "Coupled Evaluation of Below- and Above-Ground Energy and Water Cycle Variables from Reanalysis Products Over Five Flux Tower Sites in the U.S." Thesis, The University of Arizona, 2015. http://hdl.handle.net/10150/595636.

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Reanalysis products are widely used to study the land-atmosphere exchanges of energy, water, and carbon fluxes, and have been evaluated using in situ data above or below ground. Here measurements for several years at five flux tower sites in the U.S. (with a total of 315,576 hours of data) are used for the coupled evaluation of both below- and above-ground processes from three global reanalysis products and six global land data assimilation products. All products show systematic errors in precipitation, snow depth, and the timing of the melting and onset of snow. Despite the biases in soil mo

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Silvestri, Selene. "Models and Algorithms for Some Covering Problems on Graphs." Thesis, Universita degli studi di Salerno, 2016. http://hdl.handle.net/10556/2303.

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2014 - 2015<br>Several real-life problems as well as problems of theoretical importance within the field of Operations Research are combinatorial in nature. Combinatorial Optimization deals with decision-making problems defined on a discrete space. Out of a finite or countably infinite set of feasible solutions, one has to choose the best one according to an objective function. Many of these problems can be modeled on undirected or directed graphs. Some of the most important problems studied in this area include the Minimum Spanning Tree Problem, the Traveling Salesman Problem, the Veh

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8

Loucaides, Socratis. "Human impact on the silica cycle : reduction of dissolved silica inputs into the ocean as a result of the increasing impervious cover /." Electronic version (PDF), 2003. http://dl.uncw.edu/etd/2003/loucaidess/socratisloucaides.pdf.

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Summers, Percy M. "The Post-frontier: Land use and social change in the Brazilian Amazon (1992 - 2002)." Diss., Virginia Tech, 2008. http://hdl.handle.net/10919/27903.

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Deforestation of tropical forests is one of the most pressing environmental problems of the twenty-first century, leading to the loss of environmental services such as climate regulation and biodiversity. The expansion of the agricultural frontier by small landholder farmers continues to be one of the major drivers of land use change in the Amazon region. Much of the recent research in the Brazilian Amazon has been focused on modeling their behavior in order to prescribe policies that can curb current deforestation rates and promote more sustainable land use practices. The availability of more

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10

Klec, Martin. "Analýza nákladů inženýrských staveb." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2017. http://www.nusl.cz/ntk/nusl-295665.

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The thesis titled "Cost analysis of engineering structures" presents a comparison of the life cycle costs of linear structures with an asphalt surface against the life cycle cost of linear structures with a concrete surface. The thesis deals with prices, costs, calculations and budgets in its theoretical part. The following chapters present history and current status, road constructions, life cycle of the construction and differences between concrete and asphalt covering. Practical part of the thesis is divided into three parts. In each sub-section, there is a practical example of comparing th

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11

Schmidt, Anja. "Time series analysis of ground frost conditionsat Abisko, sub-Arctic Sweden, 1985-2010." Thesis, Uppsala universitet, Institutionen för geovetenskaper, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-301910.

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Observed climatic change may result in modification of the ground thermal regime.The causes of shallow ground temperature variability, however, are not well documented.This thesis reports ground temperatures from Absiko Scientific Research Station, measured ata site currently not underlain by permafrost to illustrate the response of shallow groundtemperatures to changes in climatic parameters. Both air temperature and precipitationincreased at Abisko from 1985-2010. The strongest increase in air temperature occurred inwinter, whereas the precipitation increased mainly during the summer months.

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12

Fish, Jocelyn M. "Small cycle double covers and line graphs." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp01/MQ38584.pdf.

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Perron, Mary Ann. "The Value of Urban Ponds for Odonata and Plant Biodiversity." Thesis, Université d'Ottawa / University of Ottawa, 2020. http://hdl.handle.net/10393/40522.

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Urbanization involves the conversion of natural areas to impervious surfaces, which can lead to an increase in the frequency and severity of flood events in cities. To mitigate flood risk, stormwater ponds are constructed to manage urban runoff. Stormwater ponds can also be colonized by wildlife, but their suitability as habitat is disputed due to potential toxicological risks. This study assessed the suitability of stormwater ponds as habitat for the bioindicators Odonata (dragonflies and damselflies) and determined environmental factors that impact their community structure. Odonata (adults,

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14

Streib, Noah Sametz. "Planar and hamiltonian cover graphs." Diss., Georgia Institute of Technology, 2011. http://hdl.handle.net/1853/43744.

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This dissertation has two principal components: the dimension of posets with planar cover graphs, and the cartesian product of posets whose cover graphs have hamiltonian cycles that parse into symmetric chains. Posets of height two can have arbitrarily large dimension. In 1981, Kelly provided an infinite sequence of planar posets that shows that the dimension of planar posets can also be arbitrarily large. However, the height of the posets in this sequence increases with the dimension. In 2009, Felsner, Li, and Trotter conjectured that for each integer h at least 2, there exists a least po

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15

Manthey, Bodo. "Approximability of cycle covers and smoothed analysis of binary search trees." [S.l.] : [s.n.], 2005. http://deposit.ddb.de/cgi-bin/dokserv?idn=978602366.

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16

Tarasca, Nicola. "Geometric cycles on moduli spaces of curves." Doctoral thesis, Humboldt-Universität zu Berlin, Mathematisch-Naturwissenschaftliche Fakultät II, 2012. http://dx.doi.org/10.18452/16518.

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Ziel dieser Arbeit ist die explizite Berechnung gewisser geometrischer Zykel in Modulräumen von Kurven. In den letzten Jahren wurden Divisoren auf $\Mbar_{g,n}$ ausgiebig untersucht. Durch die Berechnung von Klassen in Kodimension 1 konnten wichtige Ergebnisse in der birationalen Geometrie der Räume $\Mbar_{g,n}$ erzielt werden. In Kapitel 1 geben wir einen Überblick über dieses Thema. Im Gegensatz dazu sind Klassen in Kodimension 2 im Großen und Ganzen unerforscht. In Kapitel 2 betrachten wir den Ort, der im Modulraum der Kurven vom Geschlecht 2k durch die Kurven mit einem Büschel vom Grad

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17

Gordon, Line. "Land Use, Freshwater Flows and Ecosystem Services in an Era of Global Change." Doctoral thesis, Stockholm : Univ, 2003. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-16.

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18

Liao, Julia Den-Yue. "Woodland development and soil carbon and nitrogen dynamics and storage in a subtropical savanna ecosystem." Texas A&M University, 2004. http://hdl.handle.net/1969.1/1560.

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Woody plant invasion of grasslands is prevalent worldwide, but the biogeochemical consequences of this vegetation shift remain largely unquantified. In the Rio Grande Plains, TX, grasslands and savannas dominated by C4 grasses have undergone succession over the past century to subtropical thorn woodlands dominated by C3 trees/shrubs. To elucidate mechanisms of soil organic carbon (SOC) and soil total N (STN) storage and dynamics in this ecosystem, I measured the mass and isotopic composition (δ13C, δ15N) of C and N in whole-soil and soil size/density fractions in chronosequences cons

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19

連敏筠. "Cycle Cover of Graphs." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/7za764.

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碩士<br>國立交通大學<br>應用數學系所<br>96<br>A cycle cover of a graph G is a collection of cycles of G which covers all edges of G. The size of a cycle cover is the sum of the lengths of the cycles in the cover. A flow in G under orientation D is an integer-valued function on E(G) such that the output value is equal to the input value for each v in V(G). The support of ph(i) is defined by S(ph(i)) = {e in E(G) : phi(e) not equalto 0}. For a positive integer k, if −k < (e) < k for every e in E(G), then is called a k-flow, and furthermore, if S(phi) = E(G), then is called a nowhere-zero k-flow. In this t

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20

Lin, Chia-Hui, and 林家暉. "Three Types of Two-disjoint-cycle-cover Pancyclicity And Their Applications to Cycle Embedding in Locally Twisted Cubes." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/47777454426457619950.

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碩士<br>靜宜大學<br>資訊工程學系<br>104<br>A graph G = (V, E) is two-disjoint-cycle-cover [r1, r2]-pancyclic if for any integer l satisfying r1 ≤ l ≤ r2, there exist two vertex-disjoint cycles C1 and C2 in G such that the lengths of C1 and C2 are l and |V|− l, respectively, where |V| denotes the total number of vertices in G. On the basis of this definition, we further propose Ore-type conditions for graphs to be two-disjoint-cycle-cover vertex/edge [r1, r2]-pancyclic. In addition, we study cycle embedding in the n-dimensional locally twisted cube LTQn under the consideration of two-disjoint-cycle-cover v

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21

Fei-Hung, Lin. "A Cost-effective Minimum Cycle Cover (MCC) Algorithm in WDM Networks with Automatic Protection Switching." 2006. http://www.cetd.com.tw/ec/thesisdetail.aspx?etdun=U0009-2501200721295700.

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Lin, Fei-Hung, and 林飛宏. "A Cost-effective Minimum Cycle Cover (MCC) Algorithm in WDM Networks with Automatic Protection Switching." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/77943824012377364343.

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碩士<br>元智大學<br>資訊工程學系<br>95<br>In networks with planar topologies, this paper proposes a heuristic method based on routing which is the Minimum Cycle Cover (MCC) algorithm for performing Automatic Protection Switching (APS) in optical networks. The algorithm provide for restoration inherit many advantages of Double Cycle Cover (DCC). The protection process proposed is fast, full restoration, distributed, and autonomous. It restores the network in real time, without relying on a central manager or a centralized database, but the drawback of this DCC scheme needs constructing of fault tolerant en

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Briber, Brittain. "Urbanization, the carbon cycle, and ecosystems: an exploration of coupled dynamics and feedbacks." Thesis, 2015. https://hdl.handle.net/2144/14023.

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Urban areas are responsible for the majority of global anthropogenic CO2 emissions. Urbanization has altered the structure and function of terrestrial ecosystems and is increasing rapidly, further modifying global carbon cycling. The three research papers in this dissertation explore the role of urban vegetation in the carbon cycle using a combination of atmospheric observation, field measurements, remote sensing, and modeling. First, I characterized the spatiotemporal patterns of observed atmospheric CO2 mixing ratios and compared these data to estimated CO2 fluxes at three sites across Bosto

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Matthews, H. Damon. "Land cover change, vegetation dynamics and the global carbon cycle : experiments with the UVic earth system climate model." 2004. http://hdl.handle.net/1828/484.

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This thesis explores the role of terrestrial vegetation in the global climate system in a series of modelling studies using the University of Victoria Earth System Climate Model (UVic ESCM). The ways that vegetation affects climate, as well as the feedbacks that operate between changing climate and vegetation distributions, are investigated within the framework of three foci: 1) historical land cover changes that have resulted from human modification of natural vegetation cover; 2) historical land cover change and the dynamics of terrestrial vegetation in the context of anthropogenic and natur

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Thapa, Chandra. "Graphical approaches to single-sender and two-sender index coding." Thesis, 2018. http://hdl.handle.net/1959.13/1388175.

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Research Doctorate - Doctor of Philosophy (PhD)<br>In index coding, a sender broadcasts messages through a noiseless broadcast channel to multiple receivers, each possessing a subset of the messages a priori, known as side-information. The sender knows the side-information available at each receiver, and uses that information to broadcasts coded messages, called an index code, such that all receivers can decode their requested messages using their side-information and the received index code. The aim is to find an index code with the minimum information bits per received message bits, called t

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Wang, Pei-Ling. "Modeling global human-induced soil degradation and its impacts on water balance." Thesis, 2021. http://hdl.handle.net/1828/13361.

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Soils are a critical resource for supporting ecosystems, agricultural systems, and human wellbeing. However, these same soils have been degraded by human activities throughout human history. Despite the rapid development of global models that include dynamic changes in land use and land cover (LULC) and biogeochemical processes to assess climate and hydrological impacts, soil properties are often assumed to be spatially or temporally constant. These assumptions can affect the results of model projections, impact assessments and underestimate the human impact on Earth systems. This study reveal

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Mahesh, Babu Vaddi. "Adjacent Independent Row (Air) Matrices and Index Coding." Thesis, 2018. https://etd.iisc.ac.in/handle/2005/5406.

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An index coding problem, comprises a transmitter that has a set of independent messages and a set of receivers. Each receiver knows a subset of messages, called its side-information, and demands another subset of messages, called its want-set. The transmitter can take cognizance of the side-information of the receivers and broadcast coded messages, called the index code, over a noiseless channel. The objective is to minimize the number of coded transmissions, called the length of the index code, such that each receiver can decode its wanted messages using its sideinformation and the cod

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Wang, Chun-Kai, and 王俊凱. "Two Edge-Disjoint Hamiltonian Cycles and One Isometric Path Cover in Augmented Cubes." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/10688943365551438099.

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碩士<br>朝陽科技大學<br>資訊工程系碩士班<br>100<br>The n-dimensional hypercube network Qn is one of the most popular interconnection networks since it has simple structure and is easy to implement. The n-dimensional augmented cube AQn, an important variation of the hypercube, possesses several embedding properties that hypercubes and other variations do not possess. The advantages of AQn are that the diameter is only about half of the diameter of Qn and it is node-symmetric. Recently, some interesting properties of AQn have been investigated in the literature. The presence of edge-disjoint Hamiltonian cycles

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Manthey, Bodo [Verfasser]. "Approximability of cycle covers and smoothed analysis of binary search trees / Bodo Manthey." 2005. http://d-nb.info/978602366/34.

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Hosney, Mohamed. "PERFORMANCE OF GEOSYNTHETIC CLAY LINERS IN COVER, SUBSURFACE BARRIER, AND BASAL LINER APPLICATIONS." Thesis, 2014. http://hdl.handle.net/1974/8641.

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The use of geosynthetic clay liners (GCLs) as (i) covers for arsenic-rich gold mine tailings and landfills, (ii) subsurface barrier for migration of hydrocarbons in the Arctic, and (iii) basal liner for sewage treatment lagoons were examined. After 4 years in field and laboratory experiments, it was found that best cover configuration above gold mine tailings might include a layer of GCL product with polymer-enhanced bentonite and a geofilm-coated carrier geotextile serving above the tailings under ≥ 0.7 m overburden. However, acceptable performance could be achieved with using a standard GCL

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