Software components enable practical reuse of software parts and amortization of investments over multiple applications. Software components are binary units of independent production, acquisition that are combined together to form a functioning system. Building solution by combining bought and made components improves quality and supports rapid development, leading to short time to market. For these reasons, component technology is expected by many to be the corner stone of software in the year to come. Even though component software is a very promising way of building applications, it is very ...

This thesis uses the link structure of the World Wide Web as a basis to create better search engines. It focuses on the HITS algorithm, which was the first algorithm to up the link topology. HITS is implemented with slight modifications and tested with variations of its input parameters. It is also used in order to discover emerging communities in cyberspace. Other related algorithms, which use the link structure of the web as an undirected graph are described and compared with HITS. Finally, an attempt to combine link-based with text-based analysis in order to create more accurate search methods ...

Marine observatories based on sensor networks provide continuous ocean monitoring. The design phase of such systems, which is part of the complete development life cycle, is a complex and challenging task. The design difficulties may induce the designers to make architectural design errors during the design phase. This study aims to identify the best design approach that helps sensor networks designers in preventing errors and validating models at an early phase. In addition, it introduces a new environmental constraint that should be taken into consideration when building design models. To ...

Geographic Information Systems (GIS) have gone a great way since it has started as a science. GIS is making headlines in a number of disciplines and, through its advancement, has improved our ability to model our real world. In the past years the need to support the storage and retrieval of dynamic changes, which occur to our data, has increased which consequently led to the interest in spatio-temporal behavior in GIS. These years have also seen the birth of several spatio-temporal data Models, whose aim is to support this spatio-temporal behavior. The main aim behind Spatio-Temporal support is ...

In this thesis, we investigate the use of neural networks for solving the Traveling Salesman Problem (TSP). First, we review the main elements of the theory of NP-completeness. Then, we explain what makes some problems computationally intractable. We review some heuristic approaches used to provide near-optimal solutions to NP-complete problems. Then, we introduce the topic of neural networks and describe some of the most popular neural network models. We pay a special attention to a recent model, named the Hybrid Neural Network model (HNN), used for solving optimization problems and the Hybrid ...

Enterprise Resource Planning (ERP) systems are vital for managing any modern-day business. These systems aim to facilitate an organization's work by automating and integrating all business information and processes. However, ERP systems suffer from many problems that may cause an implementation failure. Many of these problems are related to usability, which is affected by the complexity of user interfaces (Uls). Usability can be defined in terms of an end-user's efficiency, effectiveness, and satisfactions. A study was conducted in this thesis to inquire about the usability problems that ...

The global Internet has experienced many years of sustained exponential growth doubling in size every nine months or faster [8]. Millions of users at tens of thousands of sites around the world depend on the global Internet as part of their daily work environment. This massive use of the Internet as well as the continuous interconnection of new groups arises many problems such as: packet loss, network congestion, insufficient bandwidth, increase in delay... In this thesis, we focus mainly on the problem of communication delay and bandwidth allocation. Our main goal is to find a way to minimize ...

This thesis deals with the modeling of comlex three-dimensional objects, and emphasizes on the Boolean operations between objects. It discusses a modification of the ray-casting method, which offers an improved performance over the regular ray-casting method. A small simulation will be performed, on a personal computer, about how to draw three-dimentional primitives and shading them using the wire-frame technique, plus performing Boolean operations between two objects using the modified version of the ray-casting method. Data structures and the main drawing algorithms that were created for this ...

In recent times, a new technology – Blockchain was brought forward to the global society. The world is using the term ‘Blockchain technology’ to signify diverse things such as the Bitcoin Blockchain, virtual currencies like Cardano and XRP, and smart contracts. Blockchain-based applications are springing up, covering several fields comprising financial services, reputation system and Internet of Things (IoT), and so on. Generally, Blockchain is implicit to be distributed ledgers that is a list of transactions verified and stored into blocks and shared among a number of computer nodes in a ...

This thesis deals with the communication network performance of the Automatic Vehicle Location (AVL) distributed database system. The Automatic Vehicle Location system is used to real-time track the movement of vehicles, traveling along a large geographical area. The full control of the movement of these vehicles requires the use of many communication systems such as Global Positioning system, Packet switching network and distributed database systems including vehicle position databases. The main goal of this thesis is to minimize the update response time in a real-time fully replicated distributed ...