Esta tesis estudia la aplicación a la World Wide Web (WWW) de las técnicas de prebúsqueda desde un punto de vista realista y práctico. La prebúsqueda se aplica a la web para reducir la latencia percibida por los usuarios ya que, básicamente, consiste en predecir y preprocesar los siguientes accesos de los usuarios. Hasta ahora, la literatura disponible acerca de la prebúsqueda web se ha concentrado en cuestiones teóricas y no ha considerado algunos de los problemas que aparecen al implementar la técnica en condiciones reales. Por otra parte, los trabajos de investigación existentes usan para la evaluación modelos simplificados que no consideran cómo los aspectos prácticos afectan realmente a la implementación de una técnica de prebúsqueda. Además, apenas unos pocos trabajos han usado índices de prestaciones que sean relevantes para los usuarios en la evaluación de los beneficios que la prebúsqueda puede lograr. Con objeto de superar estas tres restricciones se ha desarrollado Delfos, un entorno de prebúsqueda web que implementa predicción y prebúsqueda en un sistema real, puede integrarse en la arquitectura web sin realizar modificaciones en los protocolos web estándar, y es compatible con los programas existentes. Delfos también puede usarse para evaluar y comparar técnicas de prebúsqueda y algoritmos de predicción así como ayudar en el diseño de otros nuevos ya que proporciona información estadística detallada de los experimentos llevados a cabo. A modo de ejemplo, Delfos se ha usado para proponer, probar y evaluar una nueva técnica (Predecir en la Prebúsqueda, PAP) que es capaz de reducir considerablemente la latencia percibida por el usuario sin costes adicionales respecto al mecanismo de prebúsqueda básico. Los algoritmos de predicción propuestos en la literatura de investigación que alcanzan la mayor precisión incurren en un alto coste computacional, y esto representa un problema para incluirlos en sistemas reales. Para aminorar este inconveniente, en esta tesis se propone un nuevo algoritmo de predicci on de bajo coste, (Referrer Graph, RG). / De La Ossa Pérez, BA. (2011). Web Prefetching Techniques in Real Environments [Tesis doctoral no publicada]. Universitat Politècnica de València. https://doi.org/10.4995/Thesis/10251/15574 / Palancia

abstract: Recent advances in manufacturing system, such as advanced embedded sensing, big data analytics and IoT and robotics, are promising a paradigm shift in the manufacturing industry towards smart manufacturing systems. Typically, real-time data is available in many industries, such as automotive, semiconductor, and food production, which can reflect the machine conditions and production system’s operation performance. However, a major research gap still exists in terms of how to utilize these real-time data information to evaluate and predict production system performance and to further facilitate timely decision making and production control on the factory floor. To tackle these challenges, this dissertation takes on an integrated analytical approach by hybridizing data analytics, stochastic modeling and decision making under uncertainty methodology to solve practical manufacturing problems. Specifically, in this research, the machine degradation process is considered. It has been shown that machines working at different operating states may break down in different probabilistic manners. In addition, machines working in worse operating stage are more likely to fail, thus causing more frequent down period and reducing the system throughput. However, there is still a lack of analytical methods to quantify the potential impact of machine condition degradation on the overall system performance to facilitate operation decision making on the factory floor. To address these issues, this dissertation considers a serial production line with finite buffers and multiple machines following Markovian degradation process. An integrated model based on the aggregation method is built to quantify the overall system performance and its interactions with machine condition process. Moreover, system properties are investigated to analyze the influence of system parameters on system performance. In addition, three types of bottlenecks are defined and their corresponding indicators are derived to provide guidelines on improving system performance. These methods provide quantitative tools for modeling, analyzing, and improving manufacturing systems with the coupling between machine condition degradation and productivity given the real-time signals. / Dissertation/Thesis / Doctoral Dissertation Industrial Engineering 2020

This research looks at Transnet a State owned Enterprise with a key focus on how it manages its non-core property assets that are currently highly dilapidated and in a poor state of repair with resultant sub-optimal returns being derived. The non-core property portfolio of Transnet is immediately visible, by way of comparison, of their deteriorating condition as opposed to those in close proximity or surrounding them that are privately owned. Transnet is a Freight and Logistics state owned company that owns huge tracts of prime and well located land countrywide that are not optimally utilized and also holds a large property portfolio consisting of predominantly 'D' grade buildings that are currently physically, functionally and economically obsolete lacking constant maintenance or engagement in redevelopments. Most assets were initially purpose built to support freight and rail logistics operations but have overtime become functionally obsolete due to changes in logistic chains operations, advancements in technology and nature of goods coming unto the railway system. The current study was aimed at assessing the reasons as to why the non-core property assets are physically deteriorated and achieving below market related returns. The study establishes a framework for optimal management of non-core property assets in Transnet, with literature review establishing the correct approach to issues impacting real estate management such as finance, maintenance and facilities management, property management structure and systems, legislative framework guiding SOE's and corporate governance. Theoretical models have made important contributions to the formalization of certain problems related to management of SOEs and the need to improve corporate governance with a lot of research done in SOEs in China and Europe in general. The key focus of this study was to establish the causes that have resulted in the noncore property assets being highly neglected and in a poor state of repair resulting in sub-optimal returns being achieved on portfolio. The results of the case study within a survey presented a divergent view of core property assets being better managed than non-core property assets. ii The research methodology undertaken was a survey within a case study. The case study is Transnet and the target respondents consisted of personnel involved in the direct management of core and non-core property assets within the company who were interviewed and questionnaires were also used to gather research findings data. The secondary data was analyzed using quarterly asset management data and benchmarked with Investment Property Data (IPD). The research findings present a comprehensive list of challenges faced by Transnet in the management of non-core property assets with the greatest impact being the Public Finance Management Act and National Government Immoveable Assets Management Act which clearly stipulates that when assets no longer serve the core business they must be disposed of. It is also clearly evident that funding cannot be granted for property development projects that are not aligned with the core business of Transnet which is freight and rail logistics. The study brings to the attention that capital investment and strategic decisions related to management of non-core property assets including legislation need to be reviewed. This will greatly shape the future of the non-core property business and its ability to manage its future operations financially viable and sustainable. Alternative sources of funding such as the Real Estate Investment Trusts on the Johannesburg stock exchange are other avenues that can be explored to raise capital funds for upgrading existing property portfolio or raising funds for property developments. The key focus on how the enterprise should behave, and what should be done is to make non-core property assets financially sustainable and viable for the business to achieve desired returns.

The diploma thesis describes the performance evaluation of the organization according to model Start plus. The first part of the thesis is focused on the theoretical description of methods, which are used to evaluate performance of the organization. The second part of thesis describes analysis of the organization evaluation using multi-criteria model Start plus. Base on the findings, each criteria is rated and then strengths and areas for possible improvement are identified.

This master´s thesis focuses on the assessment of the financial and business performance of the company SVITAP J. H. J. spol. s r. o. by using the methods of benchmarking. First part of the work provides a theoretical background for the issue. The second part of the thesis contains instroduction of the company and situational analysis of the company. In the main part of the thesis is the acutal benchmarking of the company with selected competitors. On top of that I present possible recommendations for the selected company in order to enhance or even eliminate identified weaknesses.

The aim of this Master’s thesis is to analyze the performance of Air Bank a. s. in the period 2012 – 2017 using indicators typical for the banking sector. The results are compared with three selected competing banks. Then from publicly available information assesment is made for the two scenarios of the future development of Air Bank a. s. on the basis of the results of the economic evaluation. In the discussion part the scenarios are evaluated and then deducted the implications of Air Bank a. s. in case of fulfillment of the scenarios. The merger scenario is more advantageous in terms of economic and long-term competitiveness.

The diploma thesis is focused on the evaluation of the financial and business performance of the company NOVA Blansko Ltd. by using the benchmarking method. The first part of this work consists of the theoretical basis of the specific issue. The second part focuses on introducing the company and performing a situation analysis. The following part is a key part of this work, it contains the actual implementation of benchmarking of the company with selected competitors. The final part of this work summarizes the main findings obtained from individual analyses and recommendations for improving the company's performance.

As per its theme, this thesis deals with company performance assessment of the selected company according to the multicriterial model START PLUS. The work consists of three main parts: theoretical, analytical and design. The output of performed analyzes via point evaluation is to identify strengths and weaknesses of the company, on basis of what proposals for changes leading to an overall improvement of the company's performance will be presented.

This work focuses on the evaluation of financial and business performance of STARTECH spol. s.r.o. through the benchmarking method. The first part of the thesis defines the theoretical background related to the topic. The second part of the work contains a situational analysis, which includes a presentation of the analyzed company and competing partners who were selected for benchmarking and benchmarking itself. The last part of the work are general summaries and recommendations. The aim of the analysis is to identify the weknesses of STARTECH spol. s.r.o. and formulate suggestions for improvement.

Una de las preocupaciones que mayormente tienen los países en vías de desarrollo es el efecto de los desastres naturales sobre la educación. Por este motivo, la presente investigación realiza un análisis del efecto de los desastres naturales: Heladas e inundaciones, sobre la generación de resultados educativos, medido como puntaje de pruebas estandarizadas de matemática y lenguaje. Además, se analiza si la tipología de estos desastres podría implicar resultados diferenciados. Para ello, se aplica un modelo de efectos aleatorios con una base de datos panel disponible del estudio Young Lives (Niños del Milenio). En efecto, el estudio confirma la hipótesis de que los desastres naturales evaluados influyen en los resultados educativos por el lado de riqueza del hogar y estado de salud del estudiante. / One of the concerns that developing countries have mostly is the effect of natural disasters on education. Therefore, the present investigation carries out an analysis of the effect of natural disasters: Frost and floods, on the generation of educational results, measured as a standardized math and language test score. Furthermore, whether the typology of these disasters could imply differentiated results. For this, a random effects model is applied with a panel database available from the Young Lives study. Hence, the study confirms the hypothesis that the natural disasters evaluated influence educational outcomes on the side of household wealth and student health status. / Trabajo de investigación