Actuellement, le marché aéronautique est en constante augmentation. Pour faire face à cela, les avionneurs doivent se restructurer et revoir les processus de fabrication des pièces. En effet, il est nécessaire d’augmenter les cadences et réduire les prix tout en conservant les performances des pièces (poids et résistance mécanique). Cependant, ces trois objectifs sont contradictoires et un compromis est difficile à trouver. Ces travaux de thèse abordent cette problématique dans le cadre du CORAC. Ils proposent une manière originale d’optimiser une pièce de structure aéronautique qui vise à développer une nouvelle approche de la conception de pièces et de processus de fabrication pour tendre vers des solutions de compromis performantes. Pour ce faire, une méthodologie multicritère en trois étapes est proposée. D’abord, l’expertise industrielle est formalisée afin de formuler le problème mathématiquement. Ensuite, un algorithme génétique est utilisé afin de déterminer une population de solutions dont les performances sont placées sur un front de Pareto.Enfin, une étape de choix parmi la population finale prenant en compte le contexte industriel est mise en place. Cette méthodologie est appliquée à une porte d’avion moyen-courrier fabriquée par matriçage puis usinage. Dans ce cas, elle permet de choisir la solution la plus adaptée au contexte industriel parmi mille solutions de compromis. / Nowadays, the aeronautical market grows constantly. To face this, aircraft industry has to restructure and the manufacturing processes must be revised. Indeed, production rate must increase and manufacturing cost decrease while keeping the performances of the parts (weight and mechanical resistance). These objectives are contradictory and compromises must be found. This thesis broaches this problematic in relation to the CORAC. A novel method to optimize an aeronautical structural part and its manufacturing process is developed to tend toward performing compromise solutions. To do so, a three steps multi-criteria method is proposed. First, the industrial expertise is formalized to mathematically express the problem. Then, a genetic algorithm is used to determine a population in which every solution is located on a single Pareto front. At least, a decision step is set up to find the best solution in the population considering the industrial environment of the part. This methodology is applied to an aircraft door manufactured by forging and machining. In this case, it allows choosing the solution that fit the most the industrial environment within a one thousand solutions’ population.

The Diploma Thesis called Linguistic Characteristics of Current Production of Cookbooks consists of a theoretical knowledge and a practical analysis. The former deals with basic definitions and brief evolution of the history of Czech cookbooks which introduces the most important authors and publications. Furthermore, this part overviews individual parts of recipes and their diachronic changes. The end of the theoretical section is dedicated to important figures of speech described by the individual linguistic structures (stylistics, syntax, lexicology, morphology). The latter comprises the compilation of two cookbooks published after 1989 - Domácí kuchařka (translation: House Cookbook) and Deník Dity P. (Dita P.'s Diary). The works have been thoroughly chosen to point out the differences in both linguistic and non-linguistic structures. The Thesis tries to prove that, even though cook recipes have very pronounced features that distinguish them from other literary genres, they can also differ significantly from each other. This section includes illustrative pictures for further concretization.

The operation and maintenance phase of a complex technical system may deal with strategicdecisions for asset retirement and end-of-life management. When a fleet of aircraft reachesthe retirement phase, the operation of remaining fleet should still be kept at a defined level ofavailability. Obviously, the provisioning of spares is a key issue to support the maintenanceand operation of the remaining fleet. The best practice within the aviation industry is to re-usethe spares of retired aircraft to support the operational fleet. This is referred to parting-out.The purpose of the research conducted for this thesis has been to develop decision supportmethodologies, models and tools for the management of a sustainable part-out-based sparesprovisioning for an aircraft fleet during its retirement period. The proposed methodology willbe used to support the retirement process of aircraft fleet and enhance the organisation’scapability of making efficient and cost-effective decisions concerning the re-use of spare partsduring the retirement period. To achieve the purpose of this research, literature studies, casestudies, algorithm development and simulations have been conducted. Empirical data havebeen collected through document studies, interviews, and the perusal of archival records fromSaab Support and Services AB. The data analysis performed for this research has been basedon theories and methodologies within reliability analysis, cost modelling, spares forecasting,stock provisioning and decision making, in combination with the best practices implementedby the aviation industry for the end-of-life management and retirement of aircraft.In the present thesis, part-out-based spares provisioning (PBSP) program is proposed to utiliseretired aircraft units effectively as spare parts. The proposed approach is illustrated andverified through a case study performed on the “Saab-105” military aircraft fleet withinSwedish air force fleet. A PBSP programme is proposed, associated management activitiesare described, the key decision criteria are presented, and a functional framework for aneffective PBSP is suggested. The proposed PBSP program provides a foundation for furthermeasures and tasks to be performed within the retirement period, such as terminatingmaintenance contracts, discarding internal maintenance capabilities, reviewing stocks, scalingdown administrative processes (e.g. spares procurement and obsolescence monitoring), etc.An important part of the PBSP programme is the reliability analysis of multiple repairableunits, and this has been investigated, using parametric and non-parametric reliabilityapproaches. The aim is to identify a practical approach for estimation of the future sparedemand at fleet level. Furthermore, a set of computational models and search algorithm havebeen developed for the identification of applicable termination times, of both the parting-outprocess and the maintenance and repair actions performed on the units. This includestermination of the parting-out process (PO), the sending of parted-out units directly to storage(POS), and repair actions performed on the units received at the repair shops owing tocorrective (CM) and preventive (PM) maintenance, as well as the parted-out units that need tobe repaired (POM). The feasible termination alternatives are compared with regard to theirrespective costs and the most cost-effective solutions are identified.The results of the research study show that a PBSP programme can yield large reductions inmaintenance and spares procurement costs, while supporting operation of existing fleet athighest required availability. It also contributes positively to implement a green supply chainduring the retirement phase. The methodology and approaches introduced within the thesiscan be applied in other civil applications, such as energy, mining, process industry andtransportation sectors.

Submitted in fulfillment of the requirements for the Master’s Degree in Business Administration, Durban University of Technology, 2017. / Small and Medium Enterprises (SMEs) in South Africa (SA) contribute significantly to job creation, wealth, social stability, economic growth and reduction of poverty. While research has been conducted, with regard to customer’s perception for entire world, not too many studies have focused on the automotive sector, with specific reference to the Durban Metropolitan areas. Therefore the understanding of the factors affecting Automotive SMEs are clearly defined and explained, in order to help entrepreneurs to improve product quality and attract customers to the business. Furthermore, the study focused on examining the customers’ perceptions towards product quality. The research sample was selected using convenience sampling because populations are easily available to the researcher. The target population for this study were all owners of SMEs in the automotive sector in Durban. Based on the census study, the sample size of the study was 120 owners of the SMEs in the Durban Metropolitan Areas. A combined method of both quantitative and qualitative techniques were employed, while the analysis of data was done using the Statistics Package for Social Scientists (SPSS) version 23.0, with the result presented by figures developed in Microsoft Excel and cross tabulation tables. Various techniques were tested such as (Pearson Chi-square Test, qualitative analysis and, factor analysis). However, the report based on testing techniques were as follows: The result of the gender participants of males were greater than females who participated in the study. Therefore, the Pearson Chi-square Test was done and the result state that p = .000. Qualitative analysis was tested and the result report of “what exactly are the customers’ perceptions towards product quality in the business”. However, the result of the qualitative analysis shows that the larger number of the respondents, they felt that “good customer service” were their customers’ perceptions in the study. Factor analysis was also tested using KMO and Bartlett’s Test to present results. The result of Bartleytt’s Test of Sphericity was = 212.800; Sig = .000 this indicated that the data were appropriate for the purpose of factors analysis. The result of Kaiser-Meyer-Olkin Measure of Sampling Adequacy was = .609. This result shows that there were sufficient items for each factor. The findings of the study revealed that lack of managerial skills and development negatively compromises product quality of the automotive sector. The findings further revealed that creativity and necessary entrepreneurial skills influence implementation of sustainable growth of SMEs, and the entrepreneur’s success depends on the identification of crucial entrepreneurial skills for starting a business as well as for helping the business to survive and grow in the early stages. Therefore, capacity building for SME owners to sustain business growth is recommended. The results of the study further revealed that the absence of financial support from financial institutions delays the improvement of stock in the business as this is an obstacle resulting in the unsustainability of the SMEs in the long term. / M

No description available.

This thesis examines an automated method to detect surface deformations on automotive panels for the purpose of quality control along a manufacturing assembly line. Automation in the automotive manufacturing industry is becoming more prominent, but quality control is still largely performed by human workers. Quality control is important in the context of automotive body panels as deformations can occur along the assembly line such as inadequate handling of parts or tools around a vehicle during assembly, rack storage, and shipping from subcontractors. These defects are currently identified and marked, before panels are either rectified or discarded. This work attempts to develop an automated system to detect deformations to alleviate the dependence on human workers in quality control and improve performance by increasing speed and accuracy. Some techniques make use of an ideal CAD model behaving as a master work, and panels scanned on the assembly line are compared to this model to determine the location of deformations. This thesis presents a solution for detecting deformations of various scales without a master work. It also focuses on automated analysis requiring minimal intuitive operator-set parameters and provides the ability to classify the deformations as dings, which are deformations that protrude from the surface, or dents, which are depressions into the surface. A complete automated deformation detection system is proposed, comprised of a feature extraction module, segmentation module, and classification module, which outputs the locations of deformations when provided with the 3D mesh of an automotive panel. Two feature extraction techniques are proposed. The first is a general feature extraction technique for 3D meshes using octrees for multi-resolution analysis and evaluates the amount of surface variation to locate deformations. The second is specifically designed for the purpose of deformation detection, and analyzes multi-resolution cross-sections of a 3D mesh to locate deformations based on their estimated size. The performance of the proposed automated deformation detection system, and all of its sub-modules, is tested on a set of meshes which represent differing characteristics of deformations in surface panels, including deformations of different scales. Noisy, low resolution meshes are captured from a 3D acquisition, while artificial meshes are generated to simulate ideal acquisition conditions. The proposed system shows accurate results in both ideal situations as well as non-ideal situations under the condition of noise and complex surface curvature by extracting only the deformations of interest and accurately classifying them as dings or dents.

The thesis 'Using of Tools and Methods of Management Accouting in the Management Process of Buying Specific Items (with an example of a specific company)' describes the current process of purchasing specific parts in the company Škoda Auto a.s., focusing on quality assurance and responsibility for term accomplishment. The theoretical part of this thesis introduces the in-house company structure of Škoda Auto a.s., focusing on the Purchasing Department, with the emphasis on the Department of Control of the Purchased Parts and presents in detail the overall process of buying these parts. The practical part of the thesis is focused on the evaluation of the activities of this department by comparing current projects and projects before the establishment of the department. In conclusion, there are recommendations and suggestions for the improvement of the current system

This thesis deals with optimization of inventory of spare parts and maintenance materials in NET4GAS, s.r.o. The aim of the thesis is to sort the items stored in the company and to propose specific supply methodology for the year 2013. The thesis is divided into two parts. The first, theoretical part includes theoretical knowledge of inventory management together with the methods used in the managing process, it also introduces specific inventory management of spare parts and maintenance materials. The second, practical part describes NET4GAS, s.r.o., its current system of inventory management of spare parts and maintenance materials, it identifies the local current problems in inventory management, it proposes selection of appropriate methods of inventory optimization and it demonstrates their application to real data. For the classification of stored items is selected ABC method. To draw up the supply plan is primarily used bootstrap method (also called bootstrapping), which makes estimates of future consumption of spare parts and maintenance materials. The final section summarizes all the recommendations for improving the current inventory management.

A première vue, le sujet des prises de participations dans les sociétés non cotées apparaît comme un sujet du droit des sociétés. Mais avec la présence du capital-investissement, des investisseurs institutionnels et des différents véhicules d’investissement, le sujet relève désormais du droit des affaires. En effet plusieurs techniques juridiques ont été créées par les praticiens afin de répondre aux besoins des investisseurs. Tel est l’exemple des actions de préférence, et des différents types de valeurs mobilières. C’est aussi le cas de la création des différentes modalités de prises de participations tels que la convention de portage d’actions ou la création d’une Holding de reprise. Les prises de participations dans les sociétés non cotées ne sont pas réglementées comme elles le sont dans les sociétés cotées. La liberté contractuelle est le principe qui prévaut. Les législations françaises et libanaises connaissaient des dispositions juridiques et commerciales similaires. Mais depuis plusieurs années, le droit français, influé par la pratique du droit international des affaires, et par les concepts anglo-saxon, a tellement évolué. Cela n’est pas le cas au Liban. Pourtant, la pratique du capital-investissement s’est fortement développée au Liban. Ainsi il s’agit, tout au long de cette étude, de préciser la notion de prise de participation et ses différentes modalités. Et aussi il semble opportun d’examiner l’applicabilité des principes de négociation et des nouvelles clauses accompagnant le contrat de cession d’actions ou parts sociales, par rapport au droit français et libanais / At first sight, the subject of “The acquisition of shares in non-listed companies” seems to be relevant to the corporate law. However, with the presence of the private equity, institutional investors and different vehicles of investment, the subject is more related to business law. In fact many legal techniques were created by practitioners to respond to the investor’s needs such as preferred shares and different securities; similarly the creation of different ways to acquire shares such as holding companies and the stock carrying agreement. There is no specific regulation for the acquisition of shares in non-listed companies. The principle of contractual freedom prevails. The French and Lebanese legislation contains many similar legal principles. Nevertheless, few years ago, the French laws, influenced by the international business law, and the Anglo-Saxon approach of the subject, have evolved. This was not the case in Lebanon, although the practice of private equity was developed in Lebanon. We will proceed through this study, to clarify the notion of acquisition of shares in non-listed companies, as well as the different techniques used. It is also useful to examine how much we can apply the negotiation principles and new clauses that often accompany the sale agreement of shares, in the context of Lebanese and French law

This project studied two different ways of imposing boundary conditions weakly with the finite difference summation-by-parts (SBP) operators. These operators were combined with the boundary handling methods of simultaneous-approximation-terms (SAT) and the Projection to impose homogeneous Neumann and Dirichlet boundary conditions. The convergence rate of both methods was analyzed for different boundary conditions for the one-dimensional (1D) Schrödinger equation, without potential, which resulted in both methods performing similarly. A multi-block discretization was then implemented and different combinations of SBP-SAT and SBP-Projection were applied to impose inner boundary conditions of continuity between the blocks. A convergence study of the different methods of imposing the inner BC:s was conducted for the 1D Schrödinger equation without potential. The resulting convergence was the same for all methods and it was concluded that they performed similarly. Methods involving SBP-Projection had the slight advantage of faster computation time. Finally, the 1D Gross-Pitaevskii equation (GPE) and the 1D Schrödinger equation were analyzed with a step potential. The waves propagating towards the potential barrier were in both cases partially transmitted and partially reflected. The waves simulated with the Schrödinger equation dispersed, while the solitons simulated with the GPE kept their shape due to the equations reinforcing non-linear term. The bright soliton was partly transmitted and partly reflected. The dark soliton was either totally reflected or totally transmitted.