Dissertations / Theses on the topic 'Re-assembly'
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Jonsson, Anders. "Laboratory tests and re-assembly of the PoGO Lite detector array." Thesis, KTH, Fysik, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-103237.
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Svejcar, Lauren Nicole. "How do species interactions drive community re-assembly of banksia woodlands?" Thesis, Svejcar, Lauren Nicole (2020) How do species interactions drive community re-assembly of banksia woodlands? PhD thesis, Murdoch University, 2020. https://researchrepository.murdoch.edu.au/id/eprint/56229/.
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Degraded land is a major issue globally and impacts human societies on every inhabited continent. To counter the negative effects of land degradation and return ecosystems to reference ecological states, active restoration is often required. However, many restoration efforts suffer from low success in the re-assembly of reference states. As such, there is a need for improvements on current restoration practices. Ecological theory suggests that early plant colonisers could help later arrivals in re-assembly. This theory has the potential to inform restoration efforts.
The major goal of my research is to build on current theoretical understanding of plant-plant interactions while at the same time improving restoration practice for banksia woodlands. My study system offers a great test of my ideas because it is highly biodiverse. A greater understanding of plant-plant interactions in space, and interactions between diverse functional groups, will inform the types of species to include in seed mixes and could potentially improve likelihoods of restoration success in other woody ecosystems around the world.
Specifically, I used observational and manipulative experiments to test spatial arrangements of plant species and build on theories of plant-plant interactions in early and mid-successional stages of restoration. I tracked re-assembly of banksia woodland after sand mining on the Swan Coastal Plain. I utilized spatial point pattern analysis in two studies to analyse spatial associations of perennial plant species and infer interactions from spatial arrangement. Utilizing knowledge gained from the first two studies, I manipulated the spatial arrangement of seeds to test differences in seedling survival. Finally, I tested different densities of a fire-ephemeral species that could impact survival of seedlings in restoration.
Results of my studies demonstrate that plant-plant interactions play a critical role in the survival of some species and spatial arrangement effects restoration outcomes. I found some species have a greater tendency to demonstrate positive interactions, but the strength of positive and negative interactions changes through time and by species. Similarly, density dependent mortality was strong for some species but not others. The spatial arrangement of species was also important to seedling survival. Four of six species had greater survival in concentrated seeding-bare space configurations than completely random dispersed plantings, which are representative of current restoration practices.
Few studies of positive plant-plant interactions exist for Australia and my studies demonstrate that both positive and negative interactions drive re-assembly patterns in restoration. A greater understanding of plant-plant interactions in space, and interactions between diverse functional groups, will inform the types of species to include in seed mixes and seeding spatial arrangements. Utilizing spatially-informed restoration practices could improve likelihoods of restoration success in other woody ecosystems around the world.
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Ozugurel, Emre, and Abhiram Reddam. "Strategies for assembly line re-balancing with focus on level of automation." Thesis, KTH, Industriell produktion, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-41316.
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Production companies often encounter changes that have to be met because of changing market tastes. This requires them to be flexible in their production process. In order to achieve this flexibility the efficiency of the production line is sometimes compromised. Efficiency of the production line and its flexibility has to go hand in hand if the company is to compete successfully in this dynamic market. Line balancing is an important feature in ensuring that a production line is efficient and producing at its optimum. The process of Line balancing attempts to equalize the load on each workstation of the production line.This thesis wishes to address the requirements of three organizations, KTH, SWEREA and Electrolux.We are required to submit a Master‟s thesis in order to be eligible to receive a Masters degree from the Department of Production Engineering and Management at KTH.Swedish research group SWEREA has been involved in a project titled COMPLEX in collaboration with academic and industrial organizations, which aims to define the „complexity „of a production system and help manage it. This project was founded by VINNOVA.Electrolux is a stakeholder in the COMPLEX project and has hence provided us with this opportunity of doing our Master‟s thesis at their plant. The Electrolux factory at Mariestad has undergone significant renovation. This has been done in order to reach higher levels of flexibility and efficiency in order to deal with constantly changing markets. To help rebalance their new production line by focusing on the Level of Automation at inefficient workstations is a priority along with supporting them during this phase of reconstruction.We will work on satisfying all three organizations simultaneously. On completion of this thesis, we wish to have contributed towards rebalancing the new assembly line with special focus on Level of Automation at the Electrolux factory in Mariestad along with supporting them during this phase of reconstruction. We also hope to contribute significantly in developing the definition of complexity and possible ways to deal with it.
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Avdan, Tayfun. "Circular Product Design : Developing (dis/re)assembly oriented methodology towards product end-of-life." Thesis, Linnéuniversitetet, Institutionen för skog och träteknik (SOT), 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-54113.
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This thesis aims at developing a (dis/re)assembly oriented methodology towards product end-of-life. Particular focus in this thesis is on the circularity of furniture via design for (dis/re)assembly. The main motivation behind this study was the need for a method to evaluate the (dis/re)assembly options of furniture designs to be able to facilitate repair, reuse, remanufacturing, refurbishing, or recycling. The study draws upon relevant theories and prior research on Circular product Design, Design for EoL, Design for Environment, and Design for (Dis)assembly of vehicles, electrical and elocronic equipments, whitegoods, as well as office furniture, though relatively limited. The proposed methodology determines major aspects of design for (dis/re)assembly to be taken in to consideration in the early stages of product development. It further provides a set of parameters that are relevant to cabinet type and upholstery furniture group. The study involves a variety of qualitative research methods that are embedded in an interactive research conduct with the engagement of different stakeholders that are charged with the task of product development at Ikea of Sweden (IoS), the collaborator of this study. The proposed methodology is implemented on three selected furniture designs in a pilot study. The results of the study, above all, suggest that (dis/re)assemblability of a product is a strategic choice that needs to be made at early phases of product development, namely the design phase. Two particular features of the furniture groups, upon which this study focuses, emerges as factors having negative impact on the disassemblability of products: first, wooden frame sofas with respect to their complex structure and connectivity of componants and, second, permanent joints with respect to their destructive impact on the product. The study concludes that it is feasible to develop and implement a potentially comprehensible method to evaluate the ease of disassembly of furniture products and to design for disassembly. The proposed methodology in this study is a contribution to support product design for disassembly towards product circularity.
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Gold, Malcolm. "Proselytism, retention and re-affiliation : the hybridisation of an Assembly of God Church." Thesis, University of Warwick, 2000. http://wrap.warwick.ac.uk/55811/.
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This study provides a qualitative analysis of an Assembly of God Pentecostal church in the North East of England. The research employed an ethnographic framework incorporating overt participant observation and in-depth interviews over the period of one year at the City Christian Centre. In addition, a number of other churches (of varying denominations) were visited and observed. In this work, former interpretations within the sociology of religion, regarding membership and recruitment, are challenged and new perspectives offered. Few ethnographic studies of conservative evangelical Christians in the United Kingdom exist and quantitative work on this group, generally, has failed to define significant concepts such as salvation and conversion adequately. While such concepts remain foundational to the conservative evangelical believer, a significant transformation of religious expression is taking place within contemporary British Pentecostalism. This thesis gives an account of a synthesis between classical Pentecostals and the Charismatic movement that is creating a distinct form of spiritual expression resulting in a hybrid church. This fusion of traditions affects congregations in a number of important areas. Expressions of praise and worship, theological interpretations and church leadership each reflect the dynamics of the hybrid church. So in addition, does a shift in class composition. Once the preserve of the working classes, Pentecostalism in Britain is now much more socially and economically diverse in its membership. This thesis comes at an interesting time for the sociology of religion. Much is said about a resurgence of interest in religion, this is partly due to its persistence in society. Much work has focused on church demographics and secularisation, this work, however, shifts the emphasis away from religious decline to religious adaptation and change.
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Blanchard, Jesse Ryan. "A Confluence of Invasion, Behavioral, and Theoretical Ecology: What Drives Ephemeral Metacommunity Re-assembly?" FIU Digital Commons, 2018. https://digitalcommons.fiu.edu/etd/3651.
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Metacommunity theory has been particularly useful in understanding the way spatially structured communities assemble. Both niche and neutral processes are known to influence metacommunity assembly, and the relative influence of each depends on the level of dispersal-limitation. Contemporary trait-based analyses of metacommunity assembly have enhanced our understanding of these processes. Of the traits investigated, individual personalities have received the least attention, but have been suggested to be drivers of metacommunity assembly model parameters, such as dispersal tendencies and patch density. I address this topic from three angles, three chapters, in this dissertation. First, I used a three-year field survey of fish metacommunity assembly in Everglades National Park to investigate the influence of dispersal-limitation on trait-based metacommunity assembly, asking which traits were important under different levels of dispersal-limitation. I found that the relative influence of traits and local environmental factors decreased, and the influence of regional factors increased with increasing dispersal-limitation. The Rocky Glades has recently been invaded by a micropiscivore with many novel traits, the African Jewelfish. In the second chapter I used my field data to ask what influence this invader has on metacommunity assembly. Overall, African Jewelfish abundance was the third most influential factor in driving assembly. I also used data, which were previously collected by collaborators, from three years prior and two years following the invasion to observe shifts in assembly rules. Assembly became significantly more aggregative immediately following the invasion, a condition which persisted more than a decade later. All previous studies asking the same question, found the same result: invasive introductions correspond with increased species aggregation. This may be a consistent, taxa-independent signal of truly invasive species that can be detected early in the invasion process, making it a potentially useful management tool after further empirical review. In the final chapter, I investigate the potential influence of individual personalities on a metapopulation’s structure. To do this, I used a behavioral individual-based model to explore the influence of sociability, an individual’s propensity to associate with conspecifics, on metapopulation structure at ecologically relevant spatiotemporal scales. I found that individual sociability can significant influence key metapopulation parameters such as dispersal distance and patch density but may not influence landscape occupation. Chapter three concludes with new hypothesis to be evaluated by future field studies. Overall, this dissertation demonstrates the relative roles of invasions, species traits, and individual personalities on metacommunity assembly processes.
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Buzzard, Vanessa, Catherine M. Hulshof, Trevor Birt, Cyrille Violle, and Brian J. Enquist. "Re-growing a tropical dry forest: functional plant trait composition and community assembly during succession." WILEY-BLACKWELL, 2016. http://hdl.handle.net/10150/621413.
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1. A longstanding goal of ecology and conservation biology is to understand the environmental and biological controls of forest succession. However, the patterns and mechanisms that guide successional trajectories, especially within tropical forests, remain unclear. 2. We collected leaf functional trait and abiotic data across a 110-year chronosequence within a tropical dry forest in Costa Rica. Focusing on six key leaf functional traits related to resource acquisition and competition, along with measures of forest stand structure, we propose a mechanistic framework to link species composition, community trait distributions and forest structure. We quantified the community-weighted trait distributions for specific leaf area, leaf dry matter concentration, leaf phosphorus concentration, leaf carbon to nitrogen ratio and leaf stable isotopic carbon and nitrogen. We assessed several prominent hypotheses for how these functional measures shift in response to changing environmental variables (soil water content, bulk density and pH) across the chronosequence. 3. Increasingly, older forests differed significantly from younger forests in species composition, above-ground biomass and shifted trait distributions. Early stages of succession were uniformly characterized by lower values of community-weighted mean specific leaf area, leaf stable nitrogen isotope and leaf phosphorus concentration. Leaf dry matter concentration and leaf carbon to nitrogen ratio were lower during earlier stages of succession, and each trait reached an optimum during intermediate stages of succession. The leaf carbon isotope ratio was the only trait to decrease linearly with increasing stand age indicating reduced water use efficiency in older forests. However, in contrast with expectations, community-weighted trait variances did not generally change through succession, and when compared to null expectations were lower than expected. 4. The observed directional shift in community-weighted mean trait values is consistent with the 'productivity filtering' hypothesis where a directional shift in water and light availability shifts physiological strategies from 'slow' to 'fast'. In contrast with expectations arising from niche based ecology, none of the community trait distributions were over-dispersed. Instead, patterns of trait dispersion are consistent with the abiotic filtering and/or competitive hierarchy hypotheses.
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Tudor, Emily Paige. "The Patterns and Processes of Insect Pollinator Re-assembly across a Post-mining Restoration Landscape." Thesis, Curtin University, 2021. http://hdl.handle.net/20.500.11937/83667.
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This thesis presents an integration of in situ field studies and ex situ laboratory experiments to provide a deeper insight into the patterns and processes underpinning the reassembly of insect pollinator communities in post-mining Jarrah Forest restoration. Overall, this research highlighted the value of early successional patches and suggests that the habitat selection of some endemic insect pollinators is driven largely by their thermal tolerance, energetic requirements, and ecophysiology.
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McElgunn, Hannah. "The discursive (re)production and transformation of social life at the occupy wall street general assembly." Thesis, McGill University, 2012. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=107912.
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This study focuses on a consensus-based deliberative practice, known as the New York City General Assembly (NYCGA). This practice, built on the values of inclusivity and equality of voice, is a key component of the Occupy Wall Street (OWS) protest. While political commentators have criticized the protest's lack of a singular demand, such a critique ignores the matrix of values and interactional norms that underlie communicative events occurring at the OWS camp, particularly the NYCGA. Consequently, this critique risks overlooking the ways in which the NYCGA produces, reinforces, and potentially transforms social relationships and sociocultural subjects, both within the real-time of the assembly and beyond. To investigate these processes of (re)production and transformation of social life, I conduct a linguistic analysis of two different aspects of the NYCGA. Firstly, I analyze the textual archive of the NYCGA that comprises (1) written documents passed through the consensus process, and (2) how-to guides and minutes produced about the consensus process. Secondly, I analyze performances of this discursive practice reconstructed through minutes and video footage. I suggest the NYCGA is a pedagogic ritual that equips participants to disrupt, or more ideally transform, ongoing discursive interactions by recontextualizing them and thus shifting their norms and attendant values.Cette étude porte sur l'Assemblée Générale de la Ville de New York (AGNY), une pratique délibérative basée sur le consensus. Cette pratique, qui épouse les valeurs d'inclusion et d'égalité, est au coeur des manifestations des indignés de « Occupy Wall Street ». La critique de cette pratique générée par des commentateurs politiques et selon laquelle celle-ci ne fabriquerait pas de demande singulière néglige cependant la matrice de valeurs et de normes sociales qui sous-tend tout événement communicatif, tels que l'AGNY. Par conséquent, le risque de cette critique est qu'elle ignore les façons dont l'AGNY construit, soutient et potentiellement transforme les relations sociales ainsi que leurs sujets socioculturels, et ce non seulement pendant, mais également au-delà des assemblées. Afin d'explorer ces processus de (re)production et de transformation de la vie sociale, cette étude propose une analyse linguistique de l'AGNY en deux parties : dans un premier temps, un examen des archives textuelles de l'AGNY (composées des documents écrits retenus par l'assemblée par voie de consensus, et des guides pratiques et des compte-rendus qui décrivent ces assemblées) et dans un deuxième temps, une analyse du déroulement de l'AGNY au travers de ses comptes-rendus et de ses enregistrements vidéo. Ces analyses démontrent que l'AGNY est un rituel pédagogique qui apprend à ces participants à intervenir (par voies d'interruptions ou plus idéalement, de transformations) au cours de discours interactifs, modifiant, par un processus de recontextualisation, les normes et les valeurs de ces discours.
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Harpster, Matthew Benjamin. "A re-assembly and reconstruction of the 9th-century AD vessel wrecked off the coast of Bozburun, Turkey." Diss., Texas A&M University, 2005. http://hdl.handle.net/1969.1/2695.
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In 1973, researchers from the Institute of Nautical Archaeology (INA) were led to the site of a wrecked ship by sponge diver Mehmet A??k??n, near his hometown of Bozburun, Turkey. During further monitoring over the following 21 years by INA, the site was identified as a merchant vessel dating from the 9th century AD. The excavation of the site by INA researchers and students from Texas A&M University occurred over four summer seasons, from 1995 to 1998, and yielded approximately 900 whole or nearly-whole amphorae, personal items, palynological material, and approximately 35 percent of the vessel??s wooden hull. This dissertation is a record of the curation, cataloging, analysis and re-assembly of the preserved elements of the Bozburun vessel??s hull, as well as a theoretical reconstruction of the entire vessel. The Bozburun vessel is unique as it is the only fully-excavated shipwreck from the 9th century AD, and is, indeed, a valuable source of examples of ship construction in the Mediterranean between the 7th and the 11th centuries AD. This dissertation, after discussing the methods of excavation and cataloging methods, posits the hypothesis that the techniques used to build this vessel represent a transitional stage in shipbuilding technology, combining distinctly old and new techniques. While the builders used embedded edge joinery in the ship??s planking, a very old method, they also appear to have used a conceptual framework and standards to design the vessel as well; methods evident in modified forms in Italian shipbuilding treatises from the Renaissance.
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Won, James C. (James Chong Moo) 1974. "Design for Assembly (DFA) analysis and application for cold-gas thrusters of a space re-entry vehicle module." Thesis, Massachusetts Institute of Technology, 2001. http://hdl.handle.net/1721.1/8549.
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Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2001.Includes bibliographical references (p. 113-114).
Design for Assembly (DFA) is a way of analyzing and designing, or redesigning, a product from the perspective of assembly in order to reduce cost and increase reliability and quality. A review was performed on the design of cold-gas thrusters of a space re-entry vehicle module project from MIT Lincoln Laboratory. This review was performed from an assembly standpoint, and focused on a redesign through DFA principles. Accordingly, it evaluated the effectiveness of DFA and specific methodologies in applications such as this "non-conventional" aerospace/defense application, in which cost is not as primary of an issue as reliability and quality. Improvements to the methodology which might be better suited for these types of applications were also explored. General Design for Assembly framework and guidelines were reviewed, followed by specific reviews of two methodologies. These were then implemented for the case study. A DFA redesign of the cold-gas thruster was developed through the results of the two methodologies. Through this process, important issues of the original design were identified and examined. The approach to these issues was strictly from a DFA perspective. Resolutions and design modifications to these issues were developed for assistance in future creation of improved assembly-oriented designs.
by James C. Won.
S.M.
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Zhang, Jianhai. "Synthetic Biology of Antibiotic Production : Assembly and Re-factoring of Secondary Metabolite Biosynthesis Gene Clusters for Heterologous Expression in Genetically Engineered Bacterial Host." Thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for bioteknologi, 2014. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-27325.
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The issues in new antibiotic discovery are pressing, because the frequent re-discovery of antibiotic scaffolds leads to few novel antibiotics discovered, besides, with the widespread use of antibacterial agents, multi-resistant pathogens are emerging, which poses more huge challenge in antibiotic discovery. However, next generation sequencing technology and bioinformatics have revealed that many secondary metabolite biosynthesis gene clusters possess the potential of producing new bioactive secondary metabolites (BSMs), which were ignored previously. Among the microorganisms, actinomycetes species are the best sources for those gene clusters. Synthetic biology is the enabling technology to activate those silent gene clusters, which aims to engineer organisms for expected applications with combination of various biotechnologies. The project employs the reciprocal regulation system between jadomycin (Jd) and chloramphenicol (Cm) in S. venezuelae: JadR1 activates Jd synthesis while represses Cm synthesis with ethanol shock. This system can be used to rationally engineer S. venezuelaee for heterologous production of BSMs with re-factored gene clusters containing appropriate control elements: deletion of the jadR1 gene shall lead to down-regulation of Jd production, simultaneously induce overproduction of Cm due to the relieved repression of the Cm structural genes’ promoters. Besides, the cml gene cluster should be completely deleted to avoid interfering with the introduced gene cluster. The appropriate control element is an inducible promoter screened out with GUS assay among cmlFp, cmlIp, cmlXp, jadJp. The inducible promoter would be used to construct an inducible system for industrial scale production of BSMs, because constitutive heterologous expression of BSMs is harmful for producing hosts.The jadR1- cml- mutants were successfully generated with Gibson Assembly, transconjugation, double crossover and replica plating. The gene cluster MP112-09-Lac was cloned with native promoter and ermE* respectively and transconjugated to jadR1- cml- mutant, however, cloing of MPS05-B41-Lin was hindered by wrong PCR amplification. The four promoters were tested with GUS assay, based on MYM medium and cmlF is speculated to be the most desirable inducible promoter.
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Cho, Ji-Hyeon Jacee. "Remapping nominal features in the second language." Diss., University of Iowa, 2012. https://ir.uiowa.edu/etd/3278.
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This dissertation investigates second language (L2) development in the domains of morphosyntax and semantics. Specifically, it examines the acquisition of definiteness and specificity in Russian within the Feature Re-assembly framework (Lardiere, 2009), according to which the hardest L2 learning task is not to reset parameters but to reconfigure, or remap features from the way they are assembled in the L1 into new formal configurations in the L2. Within the Feature Re-assembly approach, it has been argued that re-assembling features that are represented overtly in the L1 and mapping them onto those that are encoded covertly by context in the L2 will present a greater difficulty than re-assembling features in the opposite direction (Slabakova, 2009). This dissertation examines the acquisition of four linguistic properties (types of modifiers, word order, indefinite determiners and case marking) that encode definiteness and specificity overtly or covertly in L2 Russian by English and Korean speakers. The native languages of the learners were chosen specifically in order to test various overt-covert mappings.
The data obtained from two experimental tasks (grammaticality and felicity judgments) completed by 56 Russian native speaker controls, 51 English- and 53 Korean-speaking learners support Slabakova's prediction that overt-to-covert realization of the feature is more challenging than covert-to-overt realization. In addition, the findings uncovered other important factors facilitating or impeding acquisition, such as the nature of the form-to-meaning mapping (one-to-one or one-to-many) and the availability of clear, unambiguous evidence for a certain mapping in the input available to learners. Results also reveal that the presence or absence of the L1 transfer depends on the overt/covert status of the feature in the L2. That is, when the feature is marked overtly in both the L1 and L2, L1 transfer has facilitative effect on the acquisition of the feature. On the contrary, when the feature is marked covertly in both the L1 and L2, L1 transfer has no or negative effects. These findings provide new insights into the effects of the native language on L2 learnability and enable us to come to a more precise and fine-grained understanding of grammatical meaning acquisition in the second language.
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Tybon, Robert, and n/a. "Generating Solutions to the Jigsaw Puzzle Problem." Griffith University. School of Management, 2004. http://www4.gu.edu.au:8080/adt-root/public/adt-QGU20041101.085937.
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This thesis examines the problem of the automated re-assembly of jigsaw puzzles. The objectives of this research are as follows: to provide a clear statement of the jigsaw puzzle re-assembly problem; to find out which solution technique is best suited to this problem; to determine the level of sensitivity of the proposed solution technique when solving different variations of this problem; and to explore solution methods for solving incomplete jigsaw puzzles (puzzles with missing pieces). The jigsaw puzzle re-assembly problem has been investigated only intermittently in the research literature. This work presents an extensive examination of the suitability and efficiency of the standard solution techniques that can be applied to this problem. A detailed comparison between different solution methods including Genetic Algorithms, Simulated Annealing, Tabu Search and Constraint Satisfaction Programming, shows that a constraint-based approach is the most efficient method of generating solutions to the jigsaw puzzle problem. The proposed re-assembly algorithm is successful. Consequently, it can be used in development of automated solution generators for other problems in the same domain, thus creating new theoretical and applied directions in this field of research. One potential theoretical line of research concerns jigsaw puzzles that do not have a complete set of puzzle pieces. These incomplete puzzles represent a difficult aspect of this problem that is outlined but can not be resolved in the current research. The computational experiments conducted in this thesis demonstrate that the proposed algorithm being optimised to re-assemble the jigsaw puzzles is not efficient when applied to the puzzles with missing pieces. Further work was undertaken to modify the proposed algorithm to enable efficient re-assembly of incomplete jigsaw puzzles. Consequently, an original heuristic strategy, termed Empty Slot Prediction, was developed to support the proposed algorithm, and proved successful when applied to certain sub-classes of this problem. The results obtained indicate that no one algorithm can be used to solve the multitude of possible scenarios involved in the re-assembly of incomplete jigsaw puzzles. Other variations of the jigsaw puzzle problem that still remain unsolved are presented as avenues for future research. The solution of this problem involves a number of procedures with significant applications in other computer-related areas such as pattern recognition, feature and shape description, boundary-matching, and heuristic modelling. It also has more practical applications in robotic vision and reconstruction of broken artefacts in archaeology.
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Tybon, Robert. "Generating Solutions to the Jigsaw Puzzle Problem." Thesis, Griffith University, 2004. http://hdl.handle.net/10072/366062.
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This thesis examines the problem of the automated re-assembly of jigsaw puzzles. The objectives of this research are as follows: to provide a clear statement of the jigsaw puzzle re-assembly problem; to find out which solution technique is best suited to this problem; to determine the level of sensitivity of the proposed solution technique when solving different variations of this problem; and to explore solution methods for solving incomplete jigsaw puzzles (puzzles with missing pieces). The jigsaw puzzle re-assembly problem has been investigated only intermittently in the research literature. This work presents an extensive examination of the suitability and efficiency of the standard solution techniques that can be applied to this problem. A detailed comparison between different solution methods including Genetic Algorithms, Simulated Annealing, Tabu Search and Constraint Satisfaction Programming, shows that a constraint-based approach is the most efficient method of generating solutions to the jigsaw puzzle problem. The proposed re-assembly algorithm is successful. Consequently, it can be used in development of automated solution generators for other problems in the same domain, thus creating new theoretical and applied directions in this field of research. One potential theoretical line of research concerns jigsaw puzzles that do not have a complete set of puzzle pieces. These incomplete puzzles represent a difficult aspect of this problem that is outlined but can not be resolved in the current research. The computational experiments conducted in this thesis demonstrate that the proposed algorithm being optimised to re-assemble the jigsaw puzzles is not efficient when applied to the puzzles with missing pieces. Further work was undertaken to modify the proposed algorithm to enable efficient re-assembly of incomplete jigsaw puzzles. Consequently, an original heuristic strategy, termed Empty Slot Prediction, was developed to support the proposed algorithm, and proved successful when applied to certain sub-classes of this problem. The results obtained indicate that no one algorithm can be used to solve the multitude of possible scenarios involved in the re-assembly of incomplete jigsaw puzzles. Other variations of the jigsaw puzzle problem that still remain unsolved are presented as avenues for future research. The solution of this problem involves a number of procedures with significant applications in other computer-related areas such as pattern recognition, feature and shape description, boundary-matching, and heuristic modelling. It also has more practical applications in robotic vision and reconstruction of broken artefacts in archaeology.Thesis (PhD Doctorate)
Doctor of Philosophy (PhD)
School of Management
Faculty of Commerce and Management
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Prawatmuang, Woramon. "Effects of positive evidence, indirect negative evidence and form-function transparency on second language acquisition : evidence from L2 Chinese and L2 Thai." Thesis, University of Cambridge, 2018. https://www.repository.cam.ac.uk/handle/1810/270338.
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This study investigates second language (L2) acquisition of word orders and markers of collectivity in Chinese and Thai. One of the differences between Chinese and Thai is that Chinese nominal phrases appear with a “numeral + classifier + noun” word order while Thai phrases appear as “noun + numeral + classifier”. Another difference is that men, the Chinese collective marker, cannot be used with nouns referring to animals or indefinite nouns, while phûak, the Thai collective marker, can do so. Based on the cross-linguistic differences, an empirical study was conducted to answer whether Thai learners of Chinese and Chinese learners of Thai would be able to acquire target language (TL) structures that are different from those in their native language (L1) and whether they could reject incorrect TL structures. One hundred and forty-four participants were recruited to complete an acceptability judgment task and a self-paced reading task. It is found that both Chinese and Thai learners could perform native-like in their acceptance of TL word orders since early stages of acquisition. However, it took them until an advanced level to be able to completely reject incorrect TL word orders that resembled structures in their L1. Thai learners also faced difficulty rejecting the use of men with animal and indefinite nouns in their L2 Chinese. In contrast, Chinese learners tended to be successful in their acquisition of phûak. The results are interpreted in terms of roles of positive evidence and form-function transparency. In general, L2 learners tend to acquire a TL structure earlier when they can receive positive evidence in TL input and when a form-function connection of the structure is transparent. Nonetheless, these factors do not have an absolute effect on acquisition outcome since some learners may be able to use a probabilistic learning strategy to successfully acquire L2 knowledge even when positive evidence is unavailable.
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Brandelli, Amelia Duarte Teixeira. "Re-encontros : o sentido poético na justaposição pictórica." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2006. http://hdl.handle.net/10183/16390.
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O Sentido poético da justaposição pictórica é uma pesquisa em poéticas visuais que tem como objetivo investigar conceitos como justaposição, montagem e metáfora na constituição da minha produção em pintura. Este estudo, portanto, discute uma pintura organizada a partir do encontro de materiais que, justapostos, fazem analogia a procedimentos da pintura. Desta forma serão discutidas no transcorrer da apresentação, questões recorrentes e seus desdobramentos no processo de criação. Os materiais utilizados na construção das obras são pensados e escolhidos por suas qualidades táteis e sensuais, tais como textura, brilho, opacidade e sedução. Em um certo momento a pintura deixa o plano bidimensional e parte para a tridimensionalidade; esta mudança será analisada através de teóricos como Rosalind Krauss e Alberto Tassinari. Nesta justaposição de cores, texturas, materiais e objetos, o título apresenta-se como elemento também justaposto ao trabalho físico da pintura.The poetical sense of the pictorial juxtaposition is a research in poetical appearances that has the objective to investigate concepts as juxtaposition, assembly and metaphor in the constitution of my production in painting. This study, therefore, discuss a painting organized from the meeting of materials argues that, juxtaposed, make analogy to the painting procedures. In such a way, questions and its unfoldings in the creation process will be argued in the recurrent presentation. The materials used in the construction of the workmanships are thought and chosen for its tactile and sensual qualities, such as texture, brightness, opacity and seduction. At a certain moment the painting leaves the two-dimensional plan and goes to the tree-dimensional plan; this change will be analyzed through theoreticians as Rosalind Krauss and Alberto Tassinari. In this juxtaposition of colors, textures, materials and objects, the heading is presented as an also juxtaposed element to the physical work of the painting.
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Clouse, Jared William. "The Amaranth (Amaranthus Hypochondriacus) Genome: Genome, Transcriptome and Physical Map Assembly." BYU ScholarsArchive, 2015. https://scholarsarchive.byu.edu/etd/5916.
Full textAbstract:
Amaranthus hypochondriacus is an emerging pseudo-cereal native to the New World which has garnered increased attention in recent years due to its nutritional quality, in particular its seed protein, and more specifically its high levels of the essential amino acid lysine. It belongs to the Amaranthaceae family, is an ancient paleotetraploid that shows amphidiploid inheritance (2n=32), and has an estimated genome size of 466 Mb. Here we present a high-quality draft genome sequence of the grain amaranth A. hypochondriacus. The genome assembly consisted of 377 Mb in 3,518 scaffolds with an N50 of 371 kb. Repetitive element analysis predicted that 48% of the genome is comprised of repeat sequences, of which Copia-like elements were the most common classified retrotransposon. A transcriptome, consisting of 66,370 contigs, was assembled from eight different tissue and abiotic stress libraries. Annotation of the genome identified 23,059 genes that were supported by our de novo transcriptome assembly, the RefBeet 1.1 gene index and the Uniprot_sprot database. To describe the genetic diversity within the grain amaranths (A. hypochondriacus, A. caudatus, and A. cruentus) and their putative progenitor (A. hybridus) we re-sequenced seven accessions in the genus Amaranthus (four A. hypochondriacus, and one of each A. caudatus, A. cruentus, and A. hybridus), which identified 7,184,636 and 1,760,433 interspecific and intraspecific single nucleotide polymorphisms, respectively. A phylogeny analysis of the re-sequenced accessions substantiated the classification of A. hybridus as the progenitor species of the grain amaranths. Lastly, we generated a physical map for A. hypochondriacus using the BioNano optical mapping platform. The physical map spanned 340 Mb and a hybrid assembly using the BioNano optical genome maps nearly doubled the N50 of the assembly to 697 kb. Moreover, we analyzed synteny between amaranth and Beta vulgaris (sugar beet) and estimated, using Ks analysis, the age of the most recent polyploidization event in amaranth.
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Yi-Chen, Chen, and 陳怡甄. "Self-Assembly and Eletrochemical Sieving Studies of Luminescent Re(I)-Containing Cyclophanes." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/45942547721644451986.
Full textAbstract:
碩士國立中正大學
化學研究所
92
bstract The research focus in this thesis is classified into three parts. The first part is to utilize Py2S (4,4’- dipyridyl sulfide) and Py2S2 (4,4’- dipyridyl disulfide) as bridging ligands for the construction of neutral molecular loops, [Re(CO)3Cl(Py2S)]2 1 and [Re(CO)3Cl(Py2S2)]2 2. The one- dimensional channel structures with the cavity sizes of 6.8×6.8 Å2 (1) and 7.2×7.2 Å2 (2), respectively, have been confirmed by the X-ray diffraction studies, where the channel behavior is due to both ππ and non-classical hydrogen-bonding interactions. The second part is to utilize a series of designed pyridyl amides (L7-L10) as bridging ligands for the construction of molecular loops or squares with Re(I) as corner ions. The hydrogen-bonding functions of pyridyl amide may be anticipated to contribute in the formation of supramolecular nanotubes as functional materials by self-assembly. Fortunately, the crystal structure of complex 3, [ReL7]2, has been determined by an X-ray diffraction study, showing the channel structure based on the NH…CO hydrogen bonds. The spectroscopic and photophysical properties were also investigated. Complexes 1-7 studied here are weakly emissive, and this may be explained by the flexible backbone of the ligands. The loops 1 and 3 can be spin-coated on the glass electrode and dipped into an aqueous solution with various sizes of redox probes, and it is successfully demonstrated to show size exclusion based on the cavity sizes. This study shows that the porous nature of molecular materials may have potential applications in transportation or chemical sensing.
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HSIAO, YU-JEN, and 蕭羽媜. "Supramolecular assembly of tetrapyridyl ligands with [{Re(CO)4}3(C3N3S3)] (C3N3S3 = cyanurate trianion) and copper(I) halides." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/e3zq4t.
Full textAbstract:
碩士國立中正大學
化學暨生物化學研究所
106
The thesis is divided into two parts. In the Part 1, we used two ligands of 1,2,4,5-tetraethynyl(4-pyridyl)benzene) (p-tpeb) and tetra(4-pyridyl)-tetrathiafulvalene (TTF(py)4) to react with (Re(CO)4)3(N3S3), respectively, to afford a two molecular cages of hexanuclear {[(Re(CO)3)6(p-tpeb)2(N3S3)2]·4CH3CN·C7H8}n (1) and dodecanuclear {[(Re(CO)3)12(TTF(py)4)3(N3S3)4]·8CH3CN·12DMF}n (2) under solvothermal conditions. In the Part 2, copper(I) halides were reacted with p-tpeb and m-tpeb to give a series of coordination polymers containing [(CuI)2(p-tpeb)]n (3), [(CuI)2(m-tpeb)]n (4) and [(CuBr)2(m-tpeb)]n (5) under solvothermal conditions. 3-5 are all composed of a building block of Cu2X2, where they form 3-D, 1-D chain, and 2-D layer structures for 3-5, respectively. In addition, 5 is a 2-fold interpenetrated framework. All compounds 1-5 have been isolated and structurally characterized by elemental analysis (EA), infrared spectrometry (IR), and powder and single-crystal X-ray diffraction. Compounds 1-5 are all weakly emissive in the solid state at room temperature. 1 and 2 are most likely to originate from MLCT and ILCT transitions. 3 possibly originated from ILCT and XMCT. Interestingly, the low-energy emissions of 4 and 5 most probably originated from an XMCT transition, and this is because their Cu⋯Cu distances shorter than 2.8 Å (the sum of the van der waal radii). Owing to the higher p-orbital energy of iodide compared with bromine, the emission of 4 is significantly red-shifted to that of 5 is reasonable.
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Chun-YenYang and 楊俊彥. "Mechanisms of Transition of Birefringent Spherulites in Poly(3-hydroxybutyrate) with Amorphous Polymers: Micro-Phase Domains Induced Lamellae Re-assembly." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/hsts85.
Full textAbstract:
碩士國立成功大學
化學工程學系碩博士班
101
In this study, the crystal morphology and the birefringence of poly(3-hydroxybutyrate)/poly(methyl acrylate) (PHB/PMA) blends were studied by using polarized-light optical microscopy (POM), differential scanning calorimetry (DSC), Fourier-transfer infrared spectrometer (FTIR), wide-angle X-ray diffraction (WAXD), atomic-force microscopy (AFM), environmental scanning electron microscopy (ESEM) and small angle X-ray scattering (SAXS). PHB/PMA blends with PMA content more than 30 wt%, the Maltese cross of the spherulite rotate clockwise from negative- to positive-type spherulite with increasing Tc. The properties of amorphous polymers and the blend composition were the most important factors for the Maltese cross rotation phenomenon rather than the molecular weight of PHB, sample thickness, melting temperature, and melting time. At higher Tc, the DSC results show multiple melting peaks due to the melt of imperfect crystals. Moreover, the SEM results show that the number of PMA domains in the intraspherulite regions of PHB spherulites is reduced with increasing Tc. These two results indicate that some PMA molecular chains might be trapped into the interlamellar regions of PHB crystals, leading to the formation of imperfect PHB crystals. From FT-IR and WAXD results, the rotation phenomenon from negative- to positive-type spherulite was not caused by molecular interactions or crystal form difference. The mechanism of the rotation phenomenon of the Maltese cross in this blends is supposed to be the tilt of PHB lamellae from edge-on at lower Tc (induced by numerous tiny spherical PMA domains) to flat-on lamellae with a little tilt forward or backward to the nucleus at higher Tc. Interestingly, these spherical amorphous domains are considered to be able to influence the lamellar orientation and the optical birefringence.
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Gao, Zhufeng. "Assembly and test operations with multipass requirement in semiconductor manufacturing." Thesis, 2014. http://hdl.handle.net/2152/24901.
Full textAbstract:
In semiconductor manufacturing, wafers are grouped into lots and sent to a separate facility for assembly and test (AT) before being shipped to the customer. Up to a dozen operations are required during AT. The facility in which these operations are performed is a reentrant flow shop consisting of several dozen to several hundred machines and up to a thousand specialized tools. Each lot follows a specific route through the facility, perhaps returning to the same machine multiple times. Each step in the route is referred to as a "pass." Lots in work in process (WIP) that have more than a single step remaining in their route are referred to as multi-pass lots. The multi-pass scheduling problem is to determine machine setups, lot assignments and lot sequences to achieve optimal output, as measured by four objectives related to key device shortages, throughput, machine utilization, and makespan, prioritized in this order. The two primary goals of this research are to develop a new formulation for the multipass problem and to design a variety of solution algorithms that can be used for both planning and real-time control. To begin, the basic AT model considering only single-pass scheduling and the previously developed greedy randomized adaptive search procedure (GRASP) along with its extensions are introduced. Then two alternative schemes are proposed to solve the multipass scheduling problem. In the final phase of this research, an efficient procedure is presented for prioritizing machine changeovers in an AT facility on a periodic basis that provides real-time support. In daily planning, target machine-tooling combinations are derived based on work in process, due dates, and backlogs. As machines finish their current lots, they need to be reconfigured to match their targets. The proposed algorithm is designed to run in real time.text
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Chen, Bo-So, and 陳柏壽. "(I) Anion-Directed Assembly & Supramolecular Isomerismfor Zn2+ and Cd2+ Complexes(II) Photoinduced Electron Transfer (PET) Studies of Re(I) Complexes Containing 2-Pyridin-2-yl-1H-benzoimidazoleand 2,2’-bis-(4,5-dimethylimidazole )." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/99707929585165011703.
Full textAbstract:
碩士國立中正大學
化學所
94
Abstract Supramolecular coordination compounds of Zn2+ and Cd2+ with pyridyl-amide ligand, L6 and L7, have been isolated and their crystal structures determined by X-ray diffraction studies. Anion influence on the structures of metal-organic frameworks has been observed. The reaction of L6 with ZnCl2 and ZnBr2 leads to the formation of 1D coordination polymer, but for ZnI2 a discrete macrocycle is obtained. Although the L7 ligand coordinating to zinc halide can not produce so much difference compared with the L6 ligand system, but different anions also resulted in different space group, P21/C for Cl, P-1 for Br and I, suggesting different structural packing in the solid state. Except dipyridyldiamides, we also have utilized tripyridyltriamide, L11’ as a tridentate bridging ligand. The reaction of AgPF6 with L11’ leads to a 2-D coordination polymer. The 48-membered macrocycles constructed from three-coordinate AgI ions as connectors and three tripyridyltriamide moieties propagate into 2-D extended structures. We have also synthesized a series of Re-based coordination compounds with 2-Pyridin-2-yl-1H-benzoimidazole and 2,2’-bis- (4,5-dimethyl imidazole ). These compounds display luminescence properties in an acidic condition but in a basic condition the properties are quenched. The luminescence quenching mechanism is suggested due to deprotonation of imidazole, where photo induced electron transfer happens to quench the luminescence. The anion and cation recognition studies have also been carried in these.
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Bates, Philip David. "Re-examining the initial steps of membrane and storage lipid assembly in pea leaves and soybean embryos the dominant flux of newly synthesized fatty acid incorporation into extra-plastidic glycerolipids is through phosphatidylcholine acyl editing /." Diss., 2008. http://proquest.umi.com/pqdweb?did=1681946151&sid=1&Fmt=2&clientId=3552&RQT=309&VName=PQD.
Full textAbstract:
Thesis (Ph. D.)--Michigan State University. Biochemistry and Molecular Biology, 2008.Title from PDF t.p. (Proquest, viewed on Aug. 17, 2009) Includes bibliographical references (p. 187-203). Also issued in print.