Made available in DSpace on 2016-08-17T14:52:46Z (GMT). No. of bitstreams: 1 Geovane bezerra.pdf: 1597415 bytes, checksum: 1a51bd2c6aed9c1c6ee46b8369083350 (MD5) Previous issue date: 2003-03-20 / This work proposes a collection of architectural patterns for the development of multi-agent systems. Main architectural concerns like communication, cooperation and coordination mechanisms between the agents of the society are particularly analyzed in each described pattern. The generation of new patterns through the extension or composition of the proposed ones is also approached. The methodology for pattern extraction is based on the study of frequently used architectures of multi-agent systems, like blackboard and federative architectures, and on mechanisms of cooperation and coordination usually identified in such architectures, like master-slave, meeting and negotiator mechanisms, as well. Pattern description is based on AUML and KQML. Main AUML diagrams, like agent packages, agent diagrams and agent interaction diagrams are used to represent the structure and behavior of the society. In those diagrams, agent interactions are represented as KQML performatives. Proposed patterns are validated through the construction of three case studies related to the development of multi-agent systems for information retrieval and filtering. In these case studies, the architectures RETSINA, AMALTHAEA and ABARFI are analyzed and the reuse or potential application of proposed patterns is identified. / Este trabalho propõe uma coleção de padrões arquiteturais para o desenvolvimento de sistemas multiagente. Os principais problemas arquiteturais tais como comunicação, cooperação e mecanismo de coordenação entre os agentes são analisados e descritos em cada padrão. A geração de novos padrões pela extensão ou composição dos padrões propostos também é abordada. A metodologia utilizada para extração de padrões está baseada no estudo de arquiteturas de sistemas multiagente freqüentemente utilizadas, como as arquiteturas quadro-negro e federativas e nos mecanismos de cooperação e coordenação geralmente identificados em tais arquiteturas, como os mecanismos mestre-escravo, reunião e negociador. A descrição dos padrões está baseada em AUML e KQML. Os principais diagramas da AUML, como o diagrama de pacotes, o diagrama de agente e o diagrama de interação são usados para representar a estrutura e o comportamento da sociedade. Nesses diagramas, a representação das interações entre os agentes é feita com a utilização das performatives de KQML. Os padrões propostos são validados através da construção de três estudos de caso relacionados ao desenvolvimento de sistemas multiagente para recuperação e filtragem de informações. Nesses estudos de caso, são analisadas as arquiteturas RETSINA, AMALTHAEA e ABARFI e é identificado a potencial reutilização ou aplicação dos padrões propostos.

Despite the abundance of descriptive studies on the urban development plans of Ankara, analytical studies on specific features of these plans, especially on implementation and modification processes are scarce. This study examines the green space structure brought in Jansen&rsquo / s 1932 development plan of Ankara, the way it was implemented and the modifications that a component of this structure was subject to. The 1932 Jansen plan is a holistic and comprehensive plan that contained a conceptual green space structure, integrated with other public uses and social facilities. An in depth evaluation of Jansen&rsquo / s 1928 and 1932 plans is made and a typology of the components of the green space structure is formed. It is found that the plan principles and the components of the green space structure of Jansen&rsquo / s plan for Ankara are perfectly congruent with German planning approach and principles of the time. From the analysis of the plan modifications of the G&uuml / ven Park- Tandogan Greenway a typology of modifications is developed. It is argued that the 1933 and 1957 development laws and regulations lacked definitions for realizing and sustaining the green space types proposed by Jansen, which consequently lead to their modifications. In reality the land ownership status, &ldquo / h&acirc / l&icirc / arazi&rdquo / , under which the greenways of Jansen plan were placed, illustrates the difficulty of translating these spatial categories into the Turkish legislative framework. In this respect, this study is an attempt to provide a contribution to the study of green spaces in relation with the implementation of development plans.

雇主基於一定之經濟上目的，常與勞工在不定期勞動契約中，約定勞工於一定之期間內，必須繼續為雇主提供勞務，不得提前離職。此種最低服務年限約定條款，常見於各行各業之中，且類型繁多，也增加了問題研究的複雜性；因此，本文首重整理歸納實務上已經出現之案例類型，藉以釐清最低服務年限約定條款之定義與性質，作為研究之基礎。 有關最低服務年限約定條款的效力，涉及勞工職業自由與雇主經濟自由之衝突，本文認為應以利益權衡的方式，來判斷最低服務年限約定條款的效力。實務上，基於契約自由原則，率多承認此等條款的法律上效力，並慣於以違約金酌減之方式，來控制最低服務年限約定條款的合理性。不過，本文並不贊同實務通說之見解，另行提出「必要性」與「合理性」的二階段理論，作為最低服務年限約定條款效力的判斷依據。 實務上，最低服務年限約定條款常伴隨一些問題，譬如定型化勞動契約、終止權之限制、違約金約定條款、補償措施返還條款、訓練費用償還條款、選派進修關係等，本文也將在適當之處就此些問題加以論述。 文末，將對於最低服務年限約定條款在我國實務上的現況，作一回顧式的整理，並就相關的議題提出具有展望性的立法建議。