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Multimedia over IP (MOIP) is one of IP-based realtime communication that has been gaining popularity in recent years. Quality-of-service (QoS) is still one of the major challenges in real-time communication over IP networks. Excessive delay severely impairs communication interactivity, while packet loss results in glitches in audio and poor picture quality and frozen frames in video. In this paper,...
The grey-level co-occurrence matrices (GLCM) has been widely used for various texture analysis implementations and has provided satisfying results. The conventional GLCM method is two dimensional as it focus on the co-occurrence of the specific pixel pairs. The one-dimensional GLCM reduces the matrices to a single dimension by focusing only on the differences of the grey level between pixel pairs...
This paper is part of a larger project on MOSIX cluster computing. This paper also is a continuation of the previously published paper regarding MOSIX potential performance and threat (M. Hakim, J. Jais, 2008). The main focuses are on MOSIX implementation, survey and benchmark on MOSIX performance. In this paper, the information is presented in a broad to narrow approach, which is from an overview...
The Netflow version 9 is the latest Netflow version introduced by CISCO for the network monitoring and analysis purposes. Then come IPFIX that defined by IETF to overcome problem in Netflow version 9 and to enhance a few aspect of network flow capturing and filtering. It cooperated with PSAMP (packet sampling) standard for intelligent packet sampling for flow monitoring. This research paper will introduce...
One new algorithm is being proposed, which is the integration between one multiobjective evolutionary algorithm (MOEA): strength Pareto evolutionary algorithm 2 (SPEA2) and competitive coevolution using k-random opponents competitive fitness strategy. The resulting algorithm is referred to as SPEA2-CE-KR. This proposed algorithm was benchmarked against the original SPEA2 using seven DTLZ test problems...
The control system of AFPT (air flow pressure and temperature) pilot plant has been used successfully to demonstrate the design of some controllers such as PID, cascade PID and fuzzy logic controller. It is important to develop a gas density control system in the AFPT pilot plant since gas density is one of the gas properties which need to be set precisely in few processes. The control system is designed...
In large areas of information technology, huge collections tourism images are being created and publish anywhere especially in blog or in personal website. Many of these collections are the photo that being taken around the globe using digital camera. We know the one way of indexing and searching these digital images collections was using keyword metadata, or simply by browsing. Nowadays, content...
In this paper, we propose a CBIR approach to retrieve water element images. The experiment shows that symmetries are good example in describing the images analysis of images because we know that symmetries can be found all around and also living organisms that can represent in basic shape like circle, triangle and rectangular. In a geometry image, the kinds of symmetry interest can be described as...
Various works have been done in verifying object constraint language (OCL) by translating it to formal specification language. This paper presents the process of translating OCL to prototype verification system (PVS) using model transformation. PVS is a formal specification language based on higher-order logic and comes with a theorem prover. Two processes have been identified to translate OCL to...
This paper describes serialization support in an object oriented Java processor like jHISC. The relevance of serializing an object confines to situations when an object has to be sent over network or stored as a persistent object. But these are not rare scenarios when an application in a mobile device is considered. This paper proposes a serialization functional unit which consists of a serialization...
This paper will provide an analysis of a survey on picture attributes based on userpsilas affinity of choice. There are four picture attributes evaluated, which are picture size, picture presentation, picture colour and picture category. The objective of this survey is to collect and analyze the affinity of choice as selected by the users. There are 63 respondents involved in this survey. The respondents...
The request to protect sensitive data and computer systems from malicious impostors while allowing ease of access for legitimate users is one of the greatest challenges in the computer security field. Traditionally, conventional ID and passwords authentication schemes are used for controlling access to computer systems. However, this approach has many inherent flaws such as password sharing and password...
Classification of EEG mental task signals is a technique in the design of Brain machine interface [BMI]. A BMI can provide a digital channel for communication in the absence of the biological channels and are used to rehabilitate patients with neurodegenerative diseases, a condition in which all motor movements are impaired including speech leaving the patients totally locked-in. BMI are designed...
In this paper, we extend the blind adaptive equalization scheme of Labat, Macchi and Laot that starts up as a linear equalizer (LE) and switches into a decision feedback equalizer (DFE) once the channel eye is open. The modified scheme converges faster and switches more successfully to the DFE under severe equalization conditions such as short filter lengths and low signal-to-noise-ratios (SNR) even...
In this paper, we develop a simple and accurate stochastic model for the steady-state throughput of a TCP bulk data transfer as a function of round-trip time, loss event rate and burstiness of loss. Our model generalizes the TCP window adaptation policy and provides the analytical characterization of the fast recovery algorithm. We validated our model by conducting a large number of simulations using...
In corpus-based response generation, dialogue utterances and strategies are constructed in the form of dialogue models. Previous approaches in dialogue modeling are based on speech acts at different level of abstractions, but often constructed as grammar-based. This paper presents modeling dialogue utterances and strategies based on Conversational Acts Theory. In this approach, learning is more intuitive...
The layered structure of network processing is an effective formalism for constructing software systems. However, it has weakness in the efficiency of the total network system. Recently, cross-layer communications among network objects are expected to be a savior, which patches the lack of functionality in the layered structure. This paper describes the necessary conditions which must be met for implementing...
The ADSA (Adaptive Distributed Search and Advertising) project has advocated the use of a distributed search architecture that allows for many search engines to be independently owned and controlled, offering many advantages over the common centralised search architectures of today. Moreover, ADSA has introduced the facility for generating revenue from providing a search service. A number of quantitative...
Mapping process is important in integrating data and knowledge from multiple heterogeneous relational databases. Mapping from a relational database to a description that uses the Resource Description Framework (RDF) shows promising results where it will not jeopardize the semantics of the data. The integration is also important in realizing simultaneous data query from multiple databases. Thus, this...
This paper investigates the performance of neural network autoregressive with exogenous input (NNARX) model structure and evaluates the training data that provide robust model on fresh data set. The system under test is a self-refilling steam distillation essential oil extraction system. Two PRBS signals with different probability band were tested at different operating points and conditions. A total...
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