142 research outputs found

    Using Green Roof Concept As A Passive Design Technology To Minimise The Impact Of Global Warming

    Get PDF
    Global warming phenomenon or climate change has grabbed people attention worldwide. This phenomenon leads to many environmental issues including, higher atmospheric temperatures, intensive precipitation and increase greenhouse gaseous emission. Sea level rising, melting of ice sheets, drought, hurricane are also the effect of global warming

    Fundamental Metrics for Wireless Sensor Networks localization

    Get PDF
    During the last decade, Localization in wireless sensor networks (WSNs) is a broad topic that has received considerable attention from the research community. The approaches suggested to estimate location are implemented with different concepts, functionalities, scopes and technologies. This paper introduces a methodological approach to the evaluation of localization algorithms and contains a discussion of evaluation criteria and performance metrics followed by statistical/ empirical simulation models and metrics that affect the performance of the algorithms and hence their assessment. The major contribution of this paper is to analyze and identify relevant metrics to compare different approaches on the evaluation of localization schemes.DOI:http://dx.doi.org/10.11591/ijece.v2i4.24

    JACIE - A scripting language for Internet-based multimedia collaborative applications.

    Get PDF
    "The Internet has opened the opportunity for geographically dispersed computer users to concurrently interact, collaborate and socialise in a virtual group environment. It has shifted the nature of Internet users from "individualistic net-surfers" to "active collaborative teamworkers". But developing Internet-based collaborative applications is very laborious, tedious and time consuming. Besides patience, knowledge and skill in low-level network programming are required especially for managing interactions and communications. This thesis presents a research on the construction of a development tool for collaborative multimedia applications. The tool, named JACIE (Java-based Authoring language for Collaborative Interactive Environments), is a script language which has been developed to support rapid implementation of a wide range of network-based interactive and collaborative applications. In particular, it facilitates the management of interaction and communication through simple communication primitives such as channels and interaction protocols, hence hiding much network programming from programmers. JACIE also features a template-based programming style, a single program for both client and server, and platform-independence by using Java as the target language. A compiler prototype has been developed that translates JACIE codes to Java. Several sample applications have been implemented in JACIE and are discussed in the thesis. The major research contribution is a high-level abstraction language for collaborative multimedia applications that simplifies many programming tasks. JACIE can be a useful multimedia software engineering tool well-suited for a wide range of collaborative applications, be they stand-alone client/server applications or Web-based client/server applets.

    Enhancing the quality of service for real time traffic over optical burst switching (OBS) networks with ensuring the fairness for other traffics

    Get PDF
    Optical burst switching (OBS) networks have been attracting much consideration as a promising approach to build the next generation optical Internet. A solution for enhancing the Quality of Service (QoS) for high priority real time traffic over OBS with the fairness among the traffic types is absent in current OBS ’ QoS schemes. In this paper we present a novel Real Time Quality of Service with Fairness Ratio (RT-QoSFR) scheme that can adapt the burst assembly parameters according to the traffic QoS needs in order to enhance the real time traffic QoS requirements and to ensure the fairness for other traffic. The results show that RT-QoSFR scheme is able to fulfill the real time traffic requirements (end to end delay, and loss rate) ensuring the fairness for other traffics under various conditions such as the type of real time traffic and traffic load. RT-QoSFR can guarantee that the delay of the real time traffic packets does not exceed the maximum packets transfer delay value. Fur- thermore, it can reduce the real time traffic packets loss, at the same time guarantee the fair- ness for non real time traffic packets by determining the ratio of real time traffic inside the burst to be 50 – 60%, 30 – 40%, and 10 – 20% for high, normal, and low traffic loads respectively

    Solving Task Scheduling Problem in Cloud Computing Environment Using Orthogonal Taguchi-Cat Algorithm

    Get PDF
    In cloud computing datacenter, task execution delay is no longer accidental. In recent times, a number of artificial intelligence scheduling techniques are proposed and applied to reduce task execution delay. In this study, we proposed an algorithm called Orthogonal Taguchi Based-Cat Swarm Optimization (OTB-CSO) to minimize total task execution time. In our proposed algorithm Taguchi Orthogonal approach was incorporated at CSO tracing mode for best task mapping on VMs with minimum execution time. The proposed algorithm was implemented on CloudSim tool and evaluated based on makespan metric. Experimental results showed for 20VMs used, proposed OTB-CSO was able to minimize makespan of total tasks scheduled across VMs with 42.86%, 34.57% and 2.58% improvement over Minimum and Maximum Job First (Min-Max), Particle Swarm Optimization with Linear Descending Inertia Weight (PSO-LDIW) and Hybrid Particle Swarm Optimization with Simulated Annealing (HPSO-SA) algorithms. Results obtained showed OTB-CSO is effective to optimize task scheduling and improve overall cloud computing performance with better system utilization

    A Review On The Influence Of Building Façade In Relation With Post-Occupancy Comfort Of Green Building

    Get PDF
    Green buildings represent sustainable design and construction that require a holistic interaction between all components of a building that are environmentally responsible throughout a building’s life cycle from the beginning until the completion. A green building should deliver its occupants with a comfortable indoor environment that will satisfy their comfort needs and enhance the productivity while working in the building. Previous literature reveals that indoor environment quality (IEQ) evaluation in green rating standards such as the LEED United State and BREEAM United Kingdom; do play a significant role in the certification process of green building. The indoor environment quality (IEQ) comprises of several main aspects such as temperatures, humidity, noise, lighting, space design, structural systems and last but not least the building envelope design of roof and building facade. Consequently, establishing the thermal comfort of building occupants is a challenging area that often relate to high energy use for heating and cooling. Thus, it is believed that the sustainable design strategies such as green roof and effective façade design that suits with the climate can be used to enhance indoor environment quality (IEQ). Hence, this will improve the occupant comfort, satisfaction and work performance in a certified green building. However, this remains an inconsistent relationship, which requires additional empirical support. Despite the widespread adoption of a certified green building image and benefits, the actual impacts of these green environments have on occupant comfort satisfaction remains unclear because they rarely assessed at the post-occupancy period of the certified building. Therefore, the aim of this paper is to review the literature that claims to link the occupant's comfort of the green building to the indoor environment and architectural façade design. This paper adds to the debate by identifying the need for appropriate selection of building façade in optimizing the occupant's thermal comfort of green building

    Strategies of Accessible City for Malaysia as A Developing Country

    Get PDF
    Becoming an Accessible City in developing countries has mitigating barriers as compared to developed countries. It is comprehensive to non-discriminate PwDs in access and facilities for equal opportunity. Accessibility legislation of different nations has various success in implementing and enforcing Universal Design through regulatory, government initiatives, and planning approaches. ASEAN developing nations have awareness and advocacy, because the fragmentary built environment, resulting in Accessible City concept that has not strived to expectation. Eliciting from interviews of access consultants and city planning regulations from London, Oslo, and Singapore. Conclusively, extraction of inclusion strategies is to be adapted for implementation in Malaysia. Keywords: Accessible City; Universal Design; Inclusion strategies; developing countries. eISSN: 2398-4287© 2021. The Authors. Published for AMER ABRA cE-Bs by e-International Publishing House, Ltd., UK. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/). Peer–review under responsibility of AMER (Association of Malaysian Environment-Behaviour Researchers), ABRA (Association of Behavioural Researchers on Asians/Africans/Arabians) and cE-Bs (Centre for Environment-Behaviour Studies), Faculty of Architecture, Planning & Surveying, Universiti Teknologi MARA, Malaysia. DOI: https://doi.org/10.21834/ebpj.v6iSI4).291

    Development of Character Education Modelbased on Siri’ Value

    Get PDF
    ABSTRACT: It had been developed a valid, practical, and effective Siri’-Based Character Education Model. The result of developing this model was a product in the form of a Model Handbook. The validity of this model was executed through expert validations and practitioners. The practicality of the model was obtained from the model trials. Meanwhile, effectiveness of this model was obtained through effectiveness test. According to expert validation the level of model feasibility showed that: (1) conceptual model is 4.04 (absolutely valid), (2)book is 3.57 (valid), (3) the instrument of model implementationobservation sheet was 4.00 (absolutely valid),(4) instrument validation observation sheet model activities management of 3.93 (valid). The level of operational feasibility of the model was based on practitioners' assessment, that: (a) 54.15% of teachers assess the model can immediately be implemented or practiced. (b) 34.18% of teachers state that the Model could be practiced after being studied more deeply. (c) 11.67% of teachers assess the model can be practiced if they were given training earlier. The results of the t-test showed the value of t count of -14,936 with sig 0,000. Because sig<0.05, it can be concluded that there are significant differences between the character values of students before and after the use of this model developed. Itmeans that the development ofSiri’ Value-Based Character Education Model in increasing the character value of students in school is effective
    corecore