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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
61

Sanace sesuvu silničního tělesa / Stabilization of landslide on road embankment

Kořínková, Jana January 2018 (has links)
The topic of this Master`s thesis is to design stabilization of road embankment, which is between Brno-Chrlice and Brno-Holásky. Aim of this thesis is finding acceptable solution of problem including finding cause of fault and describing other possible options. Solution will be design in GEO5. Thesis is completed with procedure in pile installation and drawing documentation.
62

The relationship between career anchors and job satisfaction amongst employees within a leading retail organisation in the Western Cape

Fakir, Zaida January 2010 (has links)
Magister Commercii (Industrial Psychology) - MCom(IPS) / In the current recessionary cycle in which individuals finds themselves, it is interesting to see whether organisations and individuals have changed their strategies or whether they pursued their tried and tested inherent mechanisms of recruitment/work selection. In recessionary times, organisations would usually have a bigger pool to select from whilst employees, in turn, would try to position themselves in a stable work environment. From an organisational perspective, organisations have also undergone major transitions such as downsizing, merges and acquisitions, right sizing, restructuring, and reengineering. These changes have a direct impact on employees' level of motivation and job satisfaction (Ellison & Schreuder, 2000). The concept of a traditional career that an employee occupies for a lifetime performing one type of work in an organisation no longer exists. Instead, employees now work for more than one organisation in their lifetime. These changes entail that employees need to be flexible and adaptive in making career decisions (Schreuder & Coetzee, 2006). Career anchorscan be operationalized as a representation of self- perceived talents, motives, values and abilities that guide employees to make career decisions. Schreuder and Coetzee (2006), are of the opinion that if employees are not familiar with their career anchors, they could find themselves trapped in work environments that are not satisfactory and would continually be questioning themselves. Suutari and Taka (2004) emphasize the fact that there needs to be a fit between the careers of employees and the work environment. If there is no fit between the career anchors of employees and the work environment then employees are likely to become dissatisfied which may result in a high turnover of staff with a corresponding low productivity rate. This study investigates and explores the phenomenon of career anchors based on Schein's 1978 career anchor theory and how these career anchors affect employees level of job satisfaction. The Career Anchor Inventory and the Job Descriptive Index were administered to a sample of 154 employees at a leading retail organisation who completed the questionnaires. The results of this research study indicate that there are significant relationships between biographical factors and career anchors as well as between biographical factors and job satisfaction and similarly between typology of career anchors and dimensions of job satisfaction.
63

Zajištění hlubokého zářezu v sesuvné oblasti / Securing of Deep Cut in Slide Area

Pargač, Martin January 2013 (has links)
The thesis called Securing of Deep Cut in Slide Area focuses on the basic analysis of the problems connected to landslides and securing of the slopes. It also presents a solution of a certain problem, where the slope stability, potencional landslide launchers and subsequent remediaton are discussed.
64

Le renouveau des carrières organisationnelles : une approche prospective des ancres de carrière dans les industries alimentaires / The renewal of organizational careers : a foresight approach to career anchors in the food industries

Keuleyan, Remi 11 October 2019 (has links)
Le contexte actuel du marché du travail déstabilise la société salariale et, avec la disparition de la relation d’emploi à long terme, les salariés sont contraints d’élaborer des stratégies de carrière pour se protéger de nouveaux risques sociaux. Cependant, les entreprises des industries alimentaires rencontrent des difficultés pour recruter et fidéliser les salariés essentiels à leur développement. Par conséquent, il semble que la carrière organisationnelle continue de servir les intérêts stratégiques des entreprises. Dans cette recherche, nous nous interrogeons sur le devenir des carrières : « Comment évolue la carrière organisationnelle dans les industries alimentaires ? ». Nos objectifs sont d’une part, de répondre à un problème concret de gestion des carrières dans les industries alimentaires en France et d’autre part, d’enrichir les connaissances actuelles en matière d’orientation professionnelle qui semblent insuffisantes au regard des phénomènes observés sur le marché du travail. En outre, nous nous intéressons à toutes les catégories socioprofessionnelles, et notamment la population ouvrière qui semble largement oubliée des recherches sur la gestion des carrières. De façon à anticiper ces évolutions, nous élaborons une méthodologie appropriée en combinant la théorie des ancres de carrière avec la méthode de prospective de métiers. Cette nouvelle méthode, que nous appelons la « prospective des carrières », repose sur l’analyse de cent quarante études empiriques, cinquante-huit entretiens semi-directifs, cent quatre-vingt-trois questionnaires autoadministrés, un focus groupe et un webinaire. Nos principaux résultats concernent la co-construction de cinq scénarios prospectifs des carrières, l’identification de trente-quatre orientations de carrière possibles et l’opérationnalisation du concept de prospective de soi. / The present labour market destabilize the labour society and, with the disappearance of the long-terme employment relationship, employees are forced to develop career strategies to protect themselves from new social risks. However, companies in the food industry are facing difficulties in recruiting and retaining employees needed for their development. Therefore, it appears that the organizational career continues to serve the strategic interests of the companies. In this research, we wonder about the future of careers: “How is the organizational career evolving in the food industries?”. Our objectives are, on one side, to respond to a concrete career management problem in the food industry in France and, on the other side, to extend the current knowledge of vocational guidance that seem insufficient in the light of phenoma observed in the labor market. In addition, we are interested in all socioprofesionnal categories, and in particular the working-class population, which seems largely forgotten in career management research. In order to ancitipate these evolutions, we develop an appropriate methodology by combining the theory of career anchors with the jobs prospective method. The new method, which we call “career foresight”, is based on the analysis of one hundred and forty empirical studies, fifty-eight semi-structured interviews, one hundred and eighty-three self-administered questionnaires, a focus group and a webinar. Our main results concern the co-construction of five prospective career scenarios, the identification of thirty-four possible career orientations and the operationalization of the self-prospective concept.
65

Modeling of Concrete Anchors Supporting Non-Structural Components Subjected toStrong Wind and Adverse Environmental Conditions

Aragao Almeida, Salvio, Jr 04 September 2019 (has links)
No description available.
66

Numerical Studies of Tension Loaded Deformed Rebar Anchors Embedded in Concrete

Chhetri, Sandip 29 October 2020 (has links)
No description available.
67

An Exploration of Conceptual Blends in Gamespace and Gameplay

Zickel, Lee 21 June 2021 (has links)
No description available.
68

Quantification of tribological effects in expansion fasteners

Drahorad, Nicolò January 2019 (has links)
Post-installed anchors for civil construction are elements that ensure the integrity of building structures even under the most severe static, seismic and shock loadings. Despite the high popularity of this technology in construction sites all over the world, the current state of knowledge is limited and there is still a great potential for significant improvements. Specifically, expansion anchors’ mechanism relies purely on friction, therefore being able to manipulate and optimize their tribological behavior is key to meet strict safety regulations and develop outperforming and outlasting design solutions. This research project, conducted at Hilti Corporation in Schaan (Liechtenstein), presents an investigation of several antifriction coating solutions. Laboratory-scale tests have been performed to quantify the different coefficient of friction while, with full-scale standardized tests (anchor set in concrete), it has been possible to evaluate the overall mechanical performances of the specimens. Afterwards, the obtained data have been analyzed with numerical software and the samples have been further investigated with optical microscopy. The outcome of this thesis work is crucial for the development of the next generation of expansion fasteners and gives additional insights for a deeper understanding in the tribology of functional coatings. / Eftermonterade fästankare i byggnader säkerställer byggnadsstrukturernas integritet, även under de mest allvarliga statiska, seismiska och chockbelastningar. Trots stor användning och popularitet  på byggarbetsplatser över hela världen är det nuvarande kunskapsläget av denna teknik begränsat och det finns en stor potential för betydande förbättringar. Specifikt bygger expansionsankringsmekanismen på ren friktion. Därför är möjligheten att manipulera och optimera fästankarnas tribologiska beteende nyckeln till att uppfylla strikta säkerhetsbestämmelser och kunna utveckla bättre prestanda och designlösningar. Detta forskningsprojekt har utförts på Hilti Corporation i Schaan (Liechtenstein) och presenterar en undersökning av flera antifriktionsbeläggningslösningar. Laboratorieprov har utförts för att kvantifiera olika friktionskoefficienter, och efter fullskaliga standardiserade tester (med fästankare i betong) har det varit möjligt att utvärdera de övergripande mekaniska prestationerna av dessa. Erhållna data har analyserats numerisk och proverna har undersökts ytterligare med optisk mikroskopi. Resultatet av detta examensarbete är viktigt för utvecklingen av nästa generation expansionsfästen och ger även ytterligare insikt och en djupare förståelse av tribologin av funktionella beläggningar.
69

Mechanism analysis for concrete breakout capacity of single anchors in tension

Yang, Keun-Hyeok, Ashour, Ashraf January 2008 (has links)
A numerical technique based on the theory of plasticity is developed to predict an optimum failure surface generatrix and concrete breakout capacity of single anchors away from edges under tensile loads. Concrete is regarded as a rigid, perfectly plastic material obeying a modified coulomb failure criteria with effective compressive and tensile strengths. The failure mode is idealized as an assemblage of two rigid blocks separated by failure surfaces of displacement discontinuity. Minimization of the collapse load predicted by the energy equation produces the optimum shape of the failure surface generatrix. A simplified solution is also developed by approximating the failure surface as two straight lines. The effect of different parameters on the concrete breakout capacity of anchors is reviewed using the developed mechanism analysis, ACI 318-05, and test results of 501 cast-in-place and 442 post-installed anchor specimens. The shape of failure surface and concrete breakout capacity of anchors predicted by the mechanism analysis are significantly affected by the ratio between effective tensile and compressive strengths of concrete. For anchors installed in concrete having a low ratio between effective tensile and compressive strengths, a much larger horizontal extent of failure planes in concrete surface is predicted by the mechanism analysis than recommended by ACI 318-05, similar to test results. Experimental concrete breakout capacity of anchors is closer to the prediction obtained from the mechanism analysis than ACI 318-05. ACI 318-05 provisions for anchors sharply underestimate the breakout capacity of cast-in-place and post-installed anchors having effective embedment depths exceeding 200 and 80 mm (7.87 to 3.15 in.), respectively, installed in concrete of compressive strength larger than 50 MPa (7250 psi).
70

<strong>NUMERICAL INVESTIGATIONS ON BONDED ANCHORS WITH  POST-INSTALLED SUPPLEMENTARY REINFORCEMENT UNDER TENSION LOADING</strong>

Emmanuel Oladipupo Oyakojo (16497072) 06 July 2023 (has links)
<p>Recent experiments have highlighted the efficacy of post-installed reinforcement in enhancing the capacity of groups of  bonded anchors undergoing concrete breakout failure mode. This technique is particularly useful to enhance the performance of anchorages installed in members of limited dimensions such as beams and columns. This thesis presents the results of corresponding numerical investigations on bonded anchor groups in concrete strengthened with post-installed supplementary reinforcement subjected to tension loads. The study is conducted using the 3D Finite Element (FE) approach. The constitutive law of concrete is the microplane model with relaxed kinematic constraint. The interface between anchor or reinforcement and concrete is modeled with two-node bar elements, which are assigned with corresponding bond-stress slip characteristics. The proposed FE approach is validated against experimental results available in the literature by comparing load-displacement behavior and failure mode. </p> <p>The validation incorporates anchor groups with different configurations of post-installed supplementary reinforcing steel bars. The numerical investigations provide a deeper insight into the detailed behavior of anchor groups with post-installed reinforcement through the visualization of crack patterns, stress flows, and strain development. The results show that the post-installed rebars can lead to a significant increase in the performance of post-installed anchorages, and the load increase depends on the number and arrangement of rebars and the failure mode of the system. </p> <p>Lastly, the thesis presents a parametric study on strengthened anchor groups with post-installed rebars in narrow reinforced concrete (RC) members under various configurations. These simulations mimic anchorages used for seismic retrofitting beam-column joints in RC structures using a fully fastened haunch retrofit solution. Due to the limited width and depth of beams and columns, the capacity of the anchorages is often the weakest link in such retrofitting methods. The results from the FE study indicate that the post-installed supplementary reinforcement can be an efficient solution for upgrading the performance of post-installed anchorages in such retrofitting techniques.</p>

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