A model for Internet management at a higher education institution

The management of the Internet at the Nelson Mandela Metropolitan University (NMMU), an Higher Education Institute (HEI) in the Eastern and Western Cape area in South Africa (SA) was the focus of this research. The investigation was conducted into the level of Internet usage by determining for what purpose the Internet is used by the people at NMMU. The empirical data was collected, analysed and interpreted. From these findings a proposed Internet Management Model was created that will assist NMMU with its Internet management obligations. It has become a standing practice at HEIs for its Internet management and relevant Information and Communication Technology (ICT) resources to be continuously investigated by HEI Management as well as by its users. The reason is that the Internet has become the foundation on which most ICT resources function and therefore is labelled as a distinctive competency for the HEI. HEIs have limited ICT Internet resources and are expected to utilise these resources optimally, to ensure efficient and effective Internet connectivity on all campuses and to all users and systems. This is a daunting task for various reasons, amongst which are: guidelines, best practices, governance influences, etc. are not readily available to assist with decision-making processes; the number of devices that require Internet connectivity is increasing almost on a daily basis; the content found on the Internet has become extremely resources-demanding; the Internet is no longer being utilised only during working hours but on a 24/7 basis; and lastly, the Internet is increasingly being abused by its use for non-work related activities which hinder the required connection and resources requirements for those who are using the Internet for work and research purposes. The purpose of this research study was to provide a proposed Internet Management Model to address all weaknesses and threats, currently being experienced at NMMU. This was created by firstly; determining what was considered best practices regarding Internet management at HEI; secondly, determining what the NMMU Internet users were utilising the Internet for and lastly; using the combined findings to draw conclusions and thereafter create an Internet Management Model for the HEI. This can assist the NMMU ICT Management team to re-align the Internet resources to match the current business and customer requirements. This will ensure that the NMMU Internet resources are effectively and efficiently utilised, which in turn will confirm that the availability of the Internet to its users and systems becomes a reliable and pleasant experience. The ICT Management team can then focus their undivided attention on other ICT-related matters. This treatise is an exploratory, mixed method study which comprises of literature studies, surveys and cross-sectional studies. The literature studies were conducted on secondary sources to identify the national and international governance structures that influence Internet management. The empirical study which consisted of two surveys (questionnaires) was compiled from existing questionnaires as well as from literature studies, and was completed by its respective respondent groups. The first survey was used to gain an insight into what was considered best practices regarding Internet management at HEIs in South Africa. The survey consisted of questions regarding demographic data and various ICT Internet resources. Respondents were asked to identify the practices relevant to their HEI. The second survey was used to gain an insight into what the Internet was being used for at NMMU by staff and students. The survey consisted of questions regarding demographic data and the various uses, frequency and periods of Internet usage. These respondents were then asked to identify the practices relevant to their Internet usage patterns. A cross-sectional study was then used to compare the two different population groups, which were NMMU staff and students, at a single point in time. Both Descriptive and Inferential Statistical methods were used for the analysis of the data. The HEI Internet management survey samples were of various sizes with each sample having its Internet resources specifically aligned with its environment. The common stereotypes regarding their Internet resources were mostly not present

Dinâmica de sistemas setoriais de inovação: um modelo de simulação aplicado no setor brasileiro de software

Tese (doutorado) - Universidade Federal de Santa Catarina, Centro Tecnológico. Programa de Pós-Graduação em Engenharia e Gestão do ConhecimentoAs empresas inovam por meio de interações dinâmicas e complexas com outros agentes de conhecimento, formando um sistema de inovação. No entanto, estudos prévios não levam em consideração as propriedades dinâmicas de tais sistemas. Este trabalho objetiva incrementar a compreensão sobre os efeitos dinâmicos do conhecimento e aprendizado na atividade inovativa ao desenvolver um modelo dinâmico do sistema de inovação. Um novo framework foi construido, que inclui os componentes e relações essenciais de um sistema de inovação, a partir de uma revisão sistemâtica de literatura. O framework foi instanciado para o caso do Setor Brasileiro de Software no Brasil e formalizado num model de dinâmica de sistemas, utilizando dados da Pintec e da literatura prévia. Esta pesquisa proveê explicações sobre como o conhecimento e o aprendizado afetam a dinâmica dos sistemas de inovação e, a partir do modelo, demonstra a dinâmica do mesmo ao realizar experimentos pontuais

Ontologies for the Interoperability of Heterogeneous Multi-Agent Systems in the scope of Energy and Power Systems

Tesis por compendio de publicaciones[ES]El sector eléctrico, tradicionalmente dirigido por monopolios y poderosas empresas de servicios públicos, ha experimentado cambios significativos en las últimas décadas. Los avances más notables son una mayor penetración de las fuentes de energía renovable (RES por sus siglas en inglés) y la generación distribuida, que han llevado a la adopción del paradigma de las redes inteligentes (SG por sus siglas en inglés) y a la introducción de enfoques competitivos en los mercados de electricidad (EMs por sus siglas en inglés) mayoristas y algunos minoristas. Las SG emergieron rápidamente de un concepto ampliamente aceptado en la realidad. La intermitencia de las fuentes de energía renovable y su integración a gran escala plantea nuevas limitaciones y desafíos que afectan en gran medida las operaciones de los EMs. El desafiante entorno de los sistemas de potencia y energía (PES por sus siglas en inglés) refuerza la necesidad de estudiar, experimentar y validar operaciones e interacciones competitivas, dinámicas y complejas. En este contexto, la simulación, el apoyo a la toma de decisiones, y las herramientas de gestión inteligente, se vuelven imprescindibles para estudiar los diferentes mecanismos del mercado y las relaciones entre los actores involucrados. Para ello, la nueva generación de herramientas debe ser capaz de hacer frente a la rápida evolución de los PES, proporcionando a los participantes los medios adecuados para adaptarse, abordando nuevos modelos y limitaciones, y su compleja relación con los desarrollos tecnológicos y de negocios. Las plataformas basadas en múltiples agentes son particularmente adecuadas para analizar interacciones complejas en sistemas dinámicos, como PES, debido a su naturaleza distribuida e independiente. La descomposición de tareas complejas en asignaciones simples y la fácil inclusión de nuevos datos y modelos de negocio, restricciones, tipos de actores y operadores, y sus interacciones, son algunas de las principales ventajas de los enfoques basados en agentes. En este dominio, han surgido varias herramientas de modelado para simular, estudiar y resolver problemas de subdominios específicos de PES. Sin embargo, existe una limitación generalizada referida a la importante falta de interoperabilidad entre sistemas heterogéneos, que impide abordar el problema de manera global, considerando todas las interrelaciones relevantes existentes. Esto es esencial para que los jugadores puedan aprovechar al máximo las oportunidades en evolución. Por lo tanto, para lograr un marco tan completo aprovechando las herramientas existentes que permiten el estudio de partes específicas del problema global, se requiere la interoperabilidad entre estos sistemas. Las ontologías facilitan la interoperabilidad entre sistemas heterogéneos al dar un significado semántico a la información intercambiada entre las distintas partes. La ventaja radica en el hecho de que todos los involucrados en un dominio particular los conocen, comprenden y están de acuerdo con la conceptualización allí definida. Existen, en la literatura, varias propuestas para el uso de ontologías dentro de PES, fomentando su reutilización y extensión. Sin embargo, la mayoría de las ontologías se centran en un escenario de aplicación específico o en una abstracción de alto nivel de un subdominio de los PES. Además, existe una considerable heterogeneidad entre estos modelos, lo que complica su integración y adopción. Es fundamental desarrollar ontologías que representen distintas fuentes de conocimiento para facilitar las interacciones entre entidades de diferente naturaleza, promoviendo la interoperabilidad entre sistemas heterogéneos basados en agentes que permitan resolver problemas específicos de PES. Estas brechas motivan el desarrollo del trabajo de investigación de este doctorado, que surge para brindar una solución a la interoperabilidad de sistemas heterogéneos dentro de los PES. Las diversas aportaciones de este trabajo dan como resultado una sociedad de sistemas multi-agente (MAS por sus siglas en inglés) para la simulación, estudio, soporte de decisiones, operación y gestión inteligente de PES. Esta sociedad de MAS aborda los PES desde el EM mayorista hasta el SG y la eficiencia energética del consumidor, aprovechando las herramientas de simulación y apoyo a la toma de decisiones existentes, complementadas con las desarrolladas recientemente, asegurando la interoperabilidad entre ellas. Utiliza ontologías para la representación del conocimiento en un vocabulario común, lo que facilita la interoperabilidad entre los distintos sistemas. Además, el uso de ontologías y tecnologías de web semántica permite el desarrollo de herramientas agnósticas de modelos para una adaptación flexible a nuevas reglas y restricciones, promoviendo el razonamiento semántico para sistemas sensibles al contexto

Estudio de sistemas renovables avanzados para el desarrollo energético sostenible

Tesis por compendio[ES] La energía juega un papel fundamental en el desarrollo sostenible de las comunidades. Así, proporcionar recursos energéticos fiables, económicamente aceptables, medioambientalmente respetuosos y socialmente beneficiosos, resulta esencial para el desarrollo sostenible de las mismas. A pesar de la universalidad de dicha definición, el uso de la energía está muy vinculada al nivel de desarrollo de los países. De este modo, la problemática energética de los países desarrollados contrasta enormemente con la de los países en desarrollo. En esta tesis doctoral se ha identificado la principal problemática energética de ambas realidades: grave impacto medioambiental de los modelos de generación del transporte tradicionales en los países desarrollados y pobreza energética en los países en desarrollo. A partir del compendio de artículos científicos de esta tesis doctoral se ha caracterizado el uso de sistemas renovables avanzados que permite solucionar dicha problemática de forma sostenible. En concreto, el principal problema energético en países desarrollados ha sido tratado mediante la planificación energética y el diseño óptimo de sistemas híbridos de energías renovables (HRES por sus siglas en inglés) en electrolineras, necesarios para la introducción de vehículos eléctricos como alternativa de movilidad sostenible. Por otro lado, el estudio de metodologías de diseño óptimas de HRES off grid y de las estufas para cocinar mejoradas mediante gasificación de biomasa se ha focalizado en la inaccesibilidad eléctrica y a sistemas de cocina limpia que sufren las comunidades en desarrollo. Así, esta tesis aporta una serie de metodologías para optimizar y adecuar los sistemas renovables presentados para el desarrollo energético sostenible de las comunidades. Además, no sólo demuestra la idoneidad de estos sistemas para dicho fin, sino también su versatilidad de aplicación en función del nivel de crecimiento de las comunidades.[CA] L'energia juga un paper fonamental en el desenvolupament sostenible de les comunitats. Així, proporcionar recursos energètics fiables, econòmicament acceptables, mediambientalment respectuosos i socialment beneficiosos, resulta essencial per al desenvolupament sostenibles de les mateixes. A pesar de la universalitat d'aquesta definició, l'ús de la energia està vinculada al nivell de desenvolupament dels països. D'aquesta manera, la problemàtica energètica dels països desenvolupats contrasta enormement amb la dels països en desenvolupament. A aquesta tesis doctoral s'ha identificat la principal problemàtica energètica d'ambdues realitats: greu impacte mediambiental dels models de generació del transport tradicional en els països desenvolupats i pobresa energètica en els països en desenvolupament. A partir del compendi d'articles científics d'aquesta tesis doctoral s'ha caracteritzat l'ús de sistemes renovables avançats que permet solucionar aquesta problemàtica de manera sostenible. En concret, el principal problema energètic en països desenvolupats s'ha tractat mitjançant la planificació energètica i el disseny òptim de sistemes híbrids d'energies renovables (HRES, per les seues segles en anglès) en electrolineres, necessaris per la introducció de vehicles elèctrics com alternativa de mobilitat sostenible. D'altra banda, l'estudi de metodologies de disseny òptimes de HRES off grid i d'estufes per a cuinar millorades mitjançant gasificació de biomassa s'ha focalitzat en la inaccessibilitat elèctrica i a sistemes de cuina neta que pateixen les comunitats en desenvolupament. Així, aquesta tesis aporta una sèrie de metodologies per optimitzar i adequar el sistemes renovables presentats per al desenvolupament energètic sostenible de les comunitats. A més, no tan sols demostra la idoneïtat d'aquests sistemes per a aqueix fi, sinó també la seua versatilitat d'aplicació en funció del nivell de creixement de les comunitats.[EN] Energy plays a significant role for the sustainable development of communities. Hence, supplying reliable energy resources, which result economically acceptable, environmentally friendly and socially beneficial, arises as essential for their sustainable development. Despite the universality of such definition, the energy use is highly linked to the development degree of the countries. Thus, energy problems of developed countries sharply contrast with those of developing countries. This doctoral thesis identifies the main energy issues of both realities: severe environmental impact of energy generation models for traditional transport in developed countries and energy poverty in developing countries. The compendium of scientific papers of this doctoral dissertation characterizes the use of advanced renewable energy systems to solve such problems in a sustainable way. Namely, the main energy issue in developed countries has been addressed by means of energy planning and the optimal design of Hybrid Renewable Energy Systems (HRES) in electric vehicle charging stations, which ensure the introduction of electric vehicles as a sustainable mobility alternative. Moreover, the study of methodologies for the optimal design of off grid HRES and improved cooking stoves based on biomass gasification have approached the inaccessibility to electricity and to clean cooking systems that developing communities suffer. Therefore, this thesis provides a number of methodologies to optimize and adapt the presented renewable energy systems for the sustainable energy development of communities. Furthermore, it demonstrates not only the suitability of these systems for such aim, but also their versatility of application regarding the growing degree of the communities.Bastida Molina, P. (2021). Estudio de sistemas renovables avanzados para el desarrollo energético sostenible [Tesis doctoral]. Universitat Politècnica de València. https://doi.org/10.4995/Thesis/10251/172548TESISCompendi

A model for Internet management at a higher education institution

The management of the Internet at the Nelson Mandela Metropolitan University (NMMU), an Higher Education Institute (HEI) in the Eastern and Western Cape area in South Africa (SA) was the focus of this research. The investigation was conducted into the level of Internet usage by determining for what purpose the Internet is used by the people at NMMU. The empirical data was collected, analysed and interpreted. From these findings a proposed Internet Management Model was created that will assist NMMU with its Internet management obligations. It has become a standing practice at HEIs for its Internet management and relevant Information and Communication Technology (ICT) resources to be continuously investigated by HEI Management as well as by its users. The reason is that the Internet has become the foundation on which most ICT resources function and therefore is labelled as a distinctive competency for the HEI. HEIs have limited ICT Internet resources and are expected to utilise these resources optimally, to ensure efficient and effective Internet connectivity on all campuses and to all users and systems. This is a daunting task for various reasons, amongst which are: guidelines, best practices, governance influences, etc. are not readily available to assist with decision-making processes; the number of devices that require Internet connectivity is increasing almost on a daily basis; the content found on the Internet has become extremely resources-demanding; the Internet is no longer being utilised only during working hours but on a 24/7 basis; and lastly, the Internet is increasingly being abused by its use for non-work related activities which hinder the required connection and resources requirements for those who are using the Internet for work and research purposes. The purpose of this research study was to provide a proposed Internet Management Model to address all weaknesses and threats, currently being experienced at NMMU. This was created by firstly; determining what was considered best practices regarding Internet management at HEI; secondly, determining what the NMMU Internet users were utilising the Internet for and lastly; using the combined findings to draw conclusions and thereafter create an Internet Management Model for the HEI. This can assist the NMMU ICT Management team to re-align the Internet resources to match the current business and customer requirements. This will ensure that the NMMU Internet resources are effectively and efficiently utilised, which in turn will confirm that the availability of the Internet to its users and systems becomes a reliable and pleasant experience. The ICT Management team can then focus their undivided attention on other ICT-related matters. This treatise is an exploratory, mixed method study which comprises of literature studies, surveys and cross-sectional studies. The literature studies were conducted on secondary sources to identify the national and international governance structures that influence Internet management. The empirical study which consisted of two surveys (questionnaires) was compiled from existing questionnaires as well as from literature studies, and was completed by its respective respondent groups. The first survey was used to gain an insight into what was considered best practices regarding Internet management at HEIs in South Africa. The survey consisted of questions regarding demographic data and various ICT Internet resources. Respondents were asked to identify the practices relevant to their HEI. The second survey was used to gain an insight into what the Internet was being used for at NMMU by staff and students. The survey consisted of questions regarding demographic data and the various uses, frequency and periods of Internet usage. These respondents were then asked to identify the practices relevant to their Internet usage patterns. A cross-sectional study was then used to compare the two different population groups, which were NMMU staff and students, at a single point in time. Both Descriptive and Inferential Statistical methods were used for the analysis of the data. The HEI Internet management survey samples were of various sizes with each sample having its Internet resources specifically aligned with its environment. The common stereotypes regarding their Internet resources were mostly not present

Integrated ecological-economic modelling and assessment aproach for coastal ecosystem management

Thesis submitted to the Faculty of Sciences and Technology, New University of Lisbon, for the degree of Doctor of Philosophy in Environmental SciencesOver the past few decades, policy-makers have defined new instruments to address coastal ecosystem degradation. Emerging coastal management frameworks highlight the use of the best available knowledge about the ecosystem to manage coastal resources and maintain ecosystem’s services. Progress is required, however, in translating data into useful knowledge for environmental problem solving. This thesis aims to contribute to research assessing changes in coastal ecosystems and benefits generated due to management actions (or to the lack thereof). The overall objectives are to assess the ecological and economic impacts of existing management programmes, as well as future response scenarios and to translate the outcomes into useful information for managers. To address these objectives, three different approaches were developed: A multilayered ecosystem model A multilayered ecosystem model was developed to simulate management scenarios that account for the cumulative impacts of multiple uses of coastal zones. This modelling field is still at an early stage of development and is crucial, for instance, to simulate the impacts of aquaculture activities on the ecosystem, accounting for multiple farms and their interactions with other coastal activities. The multilayered ecosystem model is applied in this thesis to test scenarios designed to improve water quality and manage aquaculture. An ecological-economic assessment methodology (ΔDPSIR approach) The Differential Drivers-Pressure-State-Impact-Response (ΔDPSIR) approach further develops the integrated approach by providing an explicit link between ecological and economic information related to the use and management of coastal ecosystems. Furthermore, the ΔDPSIR approach provides a framework to synthesise scientific data into useful information for the evaluation of previously adopted policies and future response scenarios. The ΔDPSIR application is tested using different datasets and scales of analysis, including: (i)assessment of the ecological-economic impacts of the scenarios at the waterbody/watershed level, using the multilayered ecosystem model outputs, and (ii) evaluation of the ecologicaleconomic effects of aquaculture options at the individual aquaculture level, using data from an abalone farm. These are two important scale of analysis for the development of an ecosystem approach to aquaculture.A dynamic ecological-economic model (MARKET model) One of the missing links in ecosystem modelling is with economics. The MARKET model was developed to simulate the feedbacks between the ecological-economic components of aquaculture production. This model was applied to simulate shellfish production in a given ecosystem under different assumptions for price and income growth rates and the maximum available area for cultivation. Further application of the MARKET model at a wider scale might be useful for understanding the ecological and economic limitations on global aquaculture production. This integrated ecological-economic modelling and assessment approach can be further applied to address new coastal management issues, such as coastal vulnerability to natural catastrophes. It can also support implementation of current legislation and policies, such as the EU Integrated Coastal Zone Management recommendation or the development of River Basin Management Plans following the EU Water Framework Directive requirements. On the other hand, the approach can address recurring coastal management needs, such as the assessment of the outcomes of past or on-going coastal management plans worldwide, in order to detect symptoms of the overuse and misuse of coastal ecosystems.Portuguese Foundation for Science and Technology(FCT) as a Ph.D. scholarship (SFRH/BD/25131/2005.European Union, Sixth Framework Programme FP6-2002-INCO-DEV-1 SPEAR (INCO-CT-2004-510706) projec

Bilateral Industrial Symbiosis. An assessment of its potential in New South Wales to deal sustainably with manufacturing waste

Manufacturing takes place in NSW on sites that are dispersed throughout the state. They may be isolated, remote from one another and hence from likely users of their waste. This scenario is not conducive to industrial symbiosis which is conventionally understood to be a network of organisations in close geographic proximity that share resources, cascade energy and use each other’s waste. Regulations governing the disposal of waste are stringent and associated costs are significant, largely due to the highest landfill levies anywhere in Australia. The state government’s strategy is to increase levies to a level that ‘induces’ generators of waste to find alternatives to landfill. Responding to these challenges will necessitate a fundamental change in the approach to dealing with waste. The way in which manufactures might accomplish the change sustainably and systematically is the underlying issue addressed in this thesis. The concept of physical bilateral symbiosis, specifically an arrangement between a generator of waste and its user, has been developed to suit geographic conditions in NSW. However, an attempt to establish trials of its autogenous form was unsuccessful. Nevertheless, results of the attempt indicated that broader issues should be investigated: managers’ perceptions of waste disposal, their willingness and their capacity to meet the challenges imposed by government; collectively, what I have called a generator’s internal infrastructure. These issues, in turn, led to an investigation of how third parties, that is, the external infrastructure, might be able to facilitate bilateral symbiosis. The principal findings are that while some generators may develop uses for their waste others will simply not be able to do so. There is, in practice, no external infrastructure capable of facilitating systematic, bilateral symbiosis on behalf of a generator. Furthermore, government action, particularly in relation to policy on funding, is neither appropriate nor adequate for sustainable development in relation to waste. The overall conclusion is that much could be done by the private sector to increase the use of waste, if government policy were to support the effort. However, that support is expected to be very difficult to achieve, even in the form of appropriate legislation in NSW, let alone coordinated among the various jurisdictions in Australia. In regard to what actually happens in practice, the current scenario in general is unlikely to change significantly within the foreseeable future