Now showing items 1-16 of 16

    • Science and Mathematics as part of practical projects in technology and design: An analysis of challenges in realising the curriculum in Norwegian schools 

      Bungum, Berit; Esjeholm, Bjørn-Tore; Lysne, Dag Atle (Journal article; Tidsskriftartikkel; Peer reviewed, 2014)
      Technology and design is seen by many as having a potential for students to work with science and mathematics in practical contexts. The view is particularly evident in the Norwegian curriculum, where technology and design is defined as an interdisciplinary topic involving Science, Mathematics and Art & Crafts. This paper reports from a video study of the use of mathematics and science in student ...
    • Design of water shock tube for testing shell materials 

      Ji, Hongjuan; Mustafa, Mohamad; Khawaja, Hassan Abbas; Ewan, Bruce C.; Moatamedi, Mojtaba (Journal article; Tidsskriftartikkel; Peer reviewed, 2014-04-15)
      This paper presents design considerations for a shock tube experimental rig used to investigate the dynamic failure mechanisms of shell geometries subjected to water shock impact loading. In such setup, it is desirable that the drive pressure used within the tube can provide a wide range of impulsive loads on the test structures and some flexibility can be achieved on the applied pulse durations. ...
    • Investigation of the Structure of Airflow Behind a Porous Fence Aided by CFD Based Virtual Sensor Data 

      Mustafa, Mohamad; Xu, Yizhong (Journal article; Tidsskriftartikkel; Peer reviewed, 2015-02-28)
      Physical experiments have difficulties to thoroughly investigate the full structure of air flow behind a porous fence. Physical measurement sensors have their limitations of data acquisitions in turbulent air flow. Computational Fluid Dynamics (CFD) technique provides an infinite number of virtual sensors that allows producing quantitative CFD based virtual sensors data for users. In this paper, ...
    • Ownership Identification of Reindeer Calf Using Wireless Sensor Networks (WSN) 

      Mustafa, Mohamad (Journal article; Tidsskriftartikkel; Peer reviewed, 2015-08-10)
      This paper presents a technique for identifying the ownership of new-born reindeer claves using wireless sensor networks (WSNs), which is an important tool that can be used to acquire useful information about animals’ activities and movements. Reindeer are semi wild and they give birth while in the wild. Although reindeer cows usually carry identification tags or signs of their owners, it is ...
    • Measurement of Wind Flow Behavior at the Leeward Side of Porous Fences Using Ultrasonic Anemometer Device 

      Mustafa, Mohamad; Xu, Yizhong; Haritos, George; Kenji, Kosugi (Journal article; Tidsskriftartikkel; Peer reviewed, 2016-01)
      Efficiency of wind fences is evaluated by the reduction of wind velocity and the effective shelter area behind the fence. Fence porosity is the most influential structural parameters in the porous fence design, and has significant impact on the structure of wind velocity and turbulence leeward. In this work, three fences with porosity of 23%, 35% and 45% have been tested under 10m/s inlet velocity ...
    • Biogas from Organic Waste - A Case Study 

      Mustafa, Mohamad; Calay, Rajnish K; Roman, Elisabeth (Peer reviewed, 2016-07-01)
      This paper presents a case study to investigate the potential for upgrade of a bio-waste treatment plant. The paper also discusses development potentials in order to optimize the plant for maximum energy and environmental benefits. Data gathered over two consecutive years about the production of biogas, energy and bio-rest were considered and mass balance analysis of inputs and outputs of the ...
    • Thaw Penetration in Frozen Ground Subjected to Hydronic Heating 

      Sveen, Svein Erik; Nguyen, Hung Thanh; Sørensen, Bjørn Reidar (Peer reviewed, 2016-09-22)
      To facilitate excavation and foundation work in seasonally freezing or permafrost regions, the frozen soil must be thawed, either by natural (solar) thawing, or by artificial thawing where an auxiliary heat source is utilized to accelerate the process. In this paper, the process of rapid thawing of frozen ground subject to hydronic heating is studied. In particular, the performance characteristics ...
    • Efficient Distributed Localization Algorithm for Ownership Identification of Reindeer Calf Using Wireless Sensor Networks 

      Mustafa, Mohamad; Morral Adell, Gemma; diengy, Ndeye Amy (Journal article; Tidsskriftartikkel, 2017)
      This paper presents a distributed algorithm for identifying the ownership of new-born reindeer calves using wireless sensor networks (WSNs). Reindeer are semi wild animals giving birth while in the wild. Although reindeer cows usually carry identification tags or signs of their owners, it is difficult to identify the ownership of the calves within a mixed herd. Currently, identification is performed ...
    • A Hybrid Biomass Hydrothermal Gasification- Solid Oxide Fuel Cell System Combined with Improved CHP Plant for Sustainable Power Generation 

      Mustafa, Mahmoud; Nord, Natasa; Calay, Rajnish K; Mustafa, Mohamad (Journal article; Tidsskriftartikkel; Peer reviewed, 2017)
      The most popular technique, so far, for biomass waste to energy conversion has been incineration, but this technique has raised a lot of objection among nature activists due to the release of particulate matter and pollutants like nitrogen oxides (NOx) into the atmosphere. However, advanced non-incineration conversion methods like pyrolysis, thermal gasification, and plasma-arc gasification are ...
    • Numerical Simulation of Non-normal Wind Load on Porous Fences 

      Xu, Yizhong; Mustafa, Mohamad; Calay, Rajnish K; Sørensen, Bjørn Reidar (Journal article; Tidsskriftartikkel; Peer reviewed, 2017)
      This paper presents a numerical simulation of non-normal wind loads on a porous fence. It was found that non-normal wind load has significant impact on the performance of the fence in terms. The performance of the fence was measured as the effective fence zone behind the fence where flow characteristics and normal drag coefficients were maintained within safe level. It is recommended the incidental ...
    • A Techno-economic Study of a Biomass Gasification Plant for the Production of Transport Biofuel for Small Communities 

      Mustafa, Albara Mohamad Yazid Faisal; Calay, Rajnish K; Mustafa, Mohamad (Journal article; Tidsskriftartikkel; Peer reviewed, 2017-03-30)
      A techno-economic feasibility study of liquid bio-fuel production from biomass to meet the demand for public transport in small communities is presented. The methodology adopted in this work is based on calculating the demand of fuels required by transport sector and then estimating the amount of available biomass from various sources which can be treated to produce biofuels to meet the demand ...
    • Surface Functionalization of Carbon Nanotubes for Energy Applications 

      Berber, Mohamaed; Hafez, Inas H.; Mustafa, Mohamad Y. (Peer reviewed; Chapter, 2018-05-05)
      Carbon nanotubes (CNTs) are receiving a great deal of attention as a catalyst support for different energy applications, due to their high surface area and high conductivity. Recent literature studies have shown that the application of CNTs mainly depends on their surface functionalization process. Typically, pristine CNTs (as produced) have no functional groups, which is usually considered as an ...
    • Fuel cell technology application for Dubai rail systems 

      Mustafa, Mohamad; Al-Mahadin, Aziz; Kanstad, Bjørn Eirik; Calay, Rajnish K (Peer reviewed; Chapter, 2018-06-11)
      Heat engines, such as internal combustion engines, have significant adverse effects on the environment due to their heat and harmful emissions. In addition, they are dependent on energy from fossil resources, which are depleting rapidly and they are not being properly utilized due to the relatively low efficiency of heat engines usually expressed by Carnot's efficiency. The low temperature direct ...
    • Utilizing fuel cell technology for Dubai Roads and Transport Authority (RTA) 

      Al-Mahadin, Aziz; Mustafa, Mohamad (Peer reviewed; Chapter, 2018-06-11)
      The need for developing environmentally friendly and sustainable energy sources is globally evident. This is due to two main reasons: Fossil fuels will continue to supply energy demands for only a few more decades and the amount of pollution generated due to fossil fuels is exceeding acceptable limits. One very promising clean energy converter is the fuel cell (FC). Fuel cells have the ability to ...
    • Control of Airborne Noise Generated in the Cavities of a T-Slotted Aluminum Cylindrical Column 

      Mustafa, Mohamad Y.; Yizhong, Xu; Sørensen, Bjørn Reidar; Santos, José; Al-Mahadin, Aziz (Peer reviewed; Chapter, 2018-06-11)
      This paper presents a study of airborne noise generated by a T-slotted cylindrical aluminum hollow column with six slots of the type used for the construction of communication towers. Noise is a very distracting phenomena and an environmental concern caused by various sources. Noise pollution is becoming more severe with the introduction of massive human activities and the use of heavy machineries, ...
    • Feasibility of Computational Fluid Dynamics for Analyzing Airflow around Porous Fences 

      Xu, Yizhong; Calay, Rajnish K; Mustafa, Mohamad (Journal article; Peer reviewed, 2019-01-19)
      This article presents using the computational fluid dynamics (CFD) modeling to analyze the flow around porous fences. The feasibility of applying 2D and 3D models was assessed with respect to corresponding wind tunnel experiments. Comparisons between the flow structures on leeward of the fence as predicted by CFD models and the wind tunnel measurements were discussed. Velocity values for the two ...