Towards a GIS-T database design and implementation for public transit planning: the case study of Dar-Es-salaam metropolitan city, Tanzania.

Dissertation submitted in partial fulfilment of the requirements for the Degree of Master of Science in Geospatial Technologies

A design for an advanced architecture of satellite ground segments

This project proposes a preliminary architectural design for a control and data processing center, also known as 'ground segment', for Earth observation satellites.

Design and evaluation of a consulting system for database design

Database design is a difficult problem for non-expert designers. It is desirable to assist such designers during the problem solving process by means of a knowledge based (KB) system. A number of prototype KB systems have been proposed, however there are many shortcomings. Few have incorporated sufficient expertise in modeling relationships, particularly higher order relationships. There has been no empirical study that experimentally tested the effectiveness of any of these KB tools. Problem solving behavior of non-experts, whom the systems were intended to assist, has not been one of the bases for system design. In this project a consulting system for conceptual database design that addresses the above short comings was developed and empirically validated.^ The system incorporates (a) findings on why non-experts commit errors and (b) heuristics for modeling relationships. Two approaches to knowledge base implementation--system restrictiveness and decisional guidance--were used and compared in this project. The Restrictive approach is proscriptive and limits the designer's choices at various design phases by forcing him/her to follow a specific design path. The Guidance system approach which is less restrictive, provides context specific, informative and suggestive guidance throughout the design process. The main objectives of the study are to evaluate (1) whether the knowledge-based system is more effective than a system without the knowledge-base and (2) which knowledge implementation--restrictive or guidance--strategy is more effective. To evaluate the effectiveness of the knowledge base itself, the two systems were compared with a system that does not incorporate the expertise (Control).^ The experimental procedure involved the student subjects solving a task without using the system (pre-treatment task) and another task using one of the three systems (experimental task). The experimental task scores of those subjects who performed satisfactorily in the pre-treatment task were analyzed. Results are (1) The knowledge based approach to database design support lead to more accurate solutions than the control system; (2) No significant difference between the two KB approaches; (3) Guidance approach led to best performance; and (4) The subjects perceived the Restrictive system easier to use than the Guidance system. ^

Design and evaluation of a consulting system for database design

Database design is a difficult problem for non-expert designers. It is desirable to assist such designers during the problem solving process by means of a knowledge based (KB) system. Although a number of prototype KB systems have been proposed, there are many shortcomings. Firstly, few have incorporated sufficient expertise in modeling relationships, particularly higher order relationships. Secondly, there does not seem to be any published empirical study that experimentally tested the effectiveness of any of these KB tools. Thirdly, problem solving behavior of non-experts, whom the systems were intended to assist, has not been one of the bases for system design. In this project, a consulting system, called CODA, for conceptual database design that addresses the above short comings was developed and empirically validated. More specifically, the CODA system incorporates (a) findings on why non-experts commit errors and (b) heuristics for modeling relationships. Two approaches to knowledge base implementation were used and compared in this project, namely system restrictiveness and decisional guidance (Silver 1990). The Restrictive system uses a proscriptive approach and limits the designer's choices at various design phases by forcing him/her to follow a specific design path. The Guidance system approach, which is less restrictive, involves providing context specific, informative and suggestive guidance throughout the design process. Both the approaches would prevent erroneous design decisions. The main objectives of the study are to evaluate (1) whether the knowledge-based system is more effective than the system without a knowledge-base and (2) which approach to knowledge implementation - whether Restrictive or Guidance - is more effective. To evaluate the effectiveness of the knowledge base itself, the systems were compared with a system that does not incorporate the expertise (Control). An experimental procedure using student subjects was used to test the effectiveness of the systems. The subjects solved a task without using the system (pre-treatment task) and another task using one of the three systems, viz. Control, Guidance or Restrictive (experimental task). Analysis of experimental task scores of those subjects who performed satisfactorily in the pre-treatment task revealed that the knowledge based approach to database design support lead to more accurate solutions than the control system. Among the two KB approaches, Guidance approach was found to lead to better performance when compared to the Control system. It was found that the subjects perceived the Restrictive system easier to use than the Guidance system.

Disseny i implementació de la base de dades d'un sistema de descàrrega d'aplicacions per a mòbils intel·ligents

Projecte que representa la base de dades d'una plataforma per a descàrregues d'aplicacions que enregistra la informació d'usuaris, desenvolupadors, descàrregues i aplicacions.

Disseny i implementació de la base de dades d'un sistema de control energètic

Aportació d'una proposta sobre el disseny d'una base de dades que serveixi de magatzem d'informació per a una aplicació que permeti la generació de dades estadístiques sobre l'ús de l'energia.

Diseño e implementación de la base de datos de un sistema de descargas de aplicaciones para móviles inteligentes

En este trabajo se nos encarga la implementación de un sistema de base de datos que sea capaz de dar respuesta a las necesidades de los desarrolladores de aplicaciones móviles a nivel mundial.

Disseny i implementació d'una base de dades relacional per a un concessionari de vehicles

TFC de l'àrea de Base de dades del segon cicle d'Enginyeria Informàtica basat en el disseny i la implementació d'una base de dades relacional per a un concessionari de vehicles.

Disseny i implementació d'una base de dades relacional per a un concessionari de vehicles

Disseny i implementació d'una base de dades relacional per a un concessionari de vehicles i un magatzem de dades per obtenir estadístiques.

Proyecto de desarrollo de una base de datos

Desarrollo de las fases de planificación, análisis, diseño e implementación de un proyecto de desarrollo de una base de datos para un cliente ficticio.

Creació d'un quadre de comandament per a l'anàlisi de resultats d'un hospital

En aquest projecte es realitzarà un quadre de comandament amb l'eina Oracle BI, amb la construcció del data warehouse i procés ETL.

Aegis : Conexión a bases de datos distribuidas

Esta aplicación pretende ser en un cliente ligero de conexión a las distintas bases de datos, de tal forma que, de manera transparente y simplemente seleccionando un esquema de ejecución, se permitan consultas tanto de forma online como programada.

Diseño e implementación de la base de datos de un sistema de descarga de aplicaciones para móviles inteligentes

Este proyecto consiste en el diseño de una base de datos para una aplicación de gestión de la asociación mundial de programadores de aplicaciones móviles. El sistema de base de datos de dicha aplicación deberá guardar información principalmente de clientes o usuarios finales, programadores, aplicaciones y descargas, así como de toda la información relacionada y necesaria para la gestión.

Disseny i implementació de la base de dades d'un sistema de descàrrega d'aplicacions per a mòbils intel·ligents

El propòsit d'aquest treball de fi de carrera és la planificació, l'anàlisi, el disseny i la implementació d'una base de dades d'un sistema de descàrrega d'aplicacions per a mòbils intel·ligents.