Browsing Journal Articles by Author "leowpl@fke.utm.my"

Now showing items 1-20 of 20

    • Bidirectional flow micropump based on dynamic rectification 

      Pei, Song Chee; Ruzairi, Abdul Rahim, Prof. Dr. ; Rashidah @ Siti Saedah, Arsat, Dr.; Uda, Hashim, Prof. Dr.; Loew,  Pei Ling, Dr. (Elsevier B.V., 2013)
      This paper proposes a new bidirectional pumping principle based on a dynamic rectification mechanism. The pump is composed of a moveable actuation platform and a gourd-shaped chamber, whose role is to behave as both a ...

    • Design of 3D micromixer for bio-synthesis using COMSOL multiphysics software package 

      Tijjani Adam, Shuwa; Uda, Hashim, Prof. Dr.; Leow, Pei Ling, Dr.; Foo, Kai Loong (American Scientific Publishers, 2013-12)
      Moving parts of micrometer scale make the chips very expensive and fragile and are therefore to be avoided if at all possible. An alternative method for transporting fluid in the samples is through capillary effect, the ...

    • Disposable polymeric electromagnetic actuated micropump 

      Chee, Pei Song; Rashidah, Arsat, Dr.; Uda, Hashim, Prof. Dr.; Ruzairi, Abdul Rahim, Prof. Dr.; Leow, Pei Ling (American Scientific Publishers, 2012-06)
      Abstract A polymer based disposable micropump was designed and evaluated for drug release and control mechanism. The micropump is constructed via hot embossing replication technique with poly(methylmethacrylate) as body ...

    • Edge detection algorithm for enhancement of linear back projection tomographic images 

      Muhammad Jaysuman, Pusppanathan; Mahdi Faramarzi; Fazlul Rahman, Mohd Yunus; Nor Muzakkir, Nor Ayob; Ruzairi, Abdul Rahim, Prof. Dr.; Fatin Aliah, Phang Abdullah, Dr.; Usman Ullah, Sheikh, Dr.; Loew,  Pei Ling, Dr.; Khairul Hamimah, Abas; Mohd Hafiz, Fazalul Rahiman, Dr.; Shafishuhaza, Sahlan (Penerbit UTM Press, 2014)
      Process tomography (PT) is a leading technique for multiphase flow measurement and flow monitoring systems in various fields. PT has the advantage of interpreting acquired measurement data and transforming it into visual ...

    • The electroosmosis mechanism for fluid delivery in PDMS multi-layer microchannel 

      Tijjani Adam, Shuwa; Uda, Hashim, Prof. Dr.; Md. Eaqub, Ali, Dr.; Leow, Pei Ling (American Scientific Publishers All rights reserved., 2013-01)
      Here we reported on fabrication of multi-layer microstructures that takes the advantage of electroosmosis to mix fluids. Microlaboratories for biochemical applications often require rapid mixing of different fluid streams. ...

    • Hexagon platinum Schottky contact with ZnO thin film for hydrogen sensing 

      Mas Elyza, Mohd Azol; Nafarizal, Nayan, Prof. Madya Dr.; Uda, Hashim, Prof. Dr.; Muhammad Kashif, Muhammad Faroow; Mahnaz, Shafiei; Loew,  Pei Ling; Rashidah @ Siti Saedah, Arsat, Dr. (Penerbit UTM Press, 2013)
      This paper reports on the study of the effect on adding total peripheries and sharp edges to the Schottky contact as a hydrogen sensor. Schottky contact was successfully designed and fabricated as hexagon-shape. The contact ...

    • Image fusion using fuzzy logic pixel fusion for dual modality tomography system 

      Muhammad Jaysuman, Pusppanathan; Mahdi Faramarzi; Fazlul Rahman, Mohd Yunus; Nor Muzakkir, Nor Ayob; Ruzairi, Abdul Rahim, Prof. Dr. ; Fatin Aliah, Phang Abdullah, Dr.; Mohd Hafiz, Fazalul Rahiman, Dr.; Anita, Ahmad, Dr.; Loew,  Pei Ling, Dr.; Khairul Hamimah, Abas (Penerbit UTM Press, 2014)
      Process tomography has been widely investigated and developed over time. The aim of this method is to measure the cross-sectional distribution of multiphase flow parameters based on its sensing technique. These single ...

    • Imaging of a metallic object using magnetic induction tomography 

      Muhammad Saiful Badri, Mansor; Zulkarnay, Zakaria; Ruzairi, Abdul Rahim, Prof. Dr. ; Ibrahim, Balkhis; Mohd Fahajumi, Jumaah; Mohd Zikrillah, Zawahir; Herlina, Abdul Rahim, Dr.; Loew, Pei Ling, Dr.; Khairul Hamimah, Abbas (International Frequency Sensor Association Publishing (IFSA), 2013-08)
      This paper describes the metallic imaging results from magnetic induction tomography (MIT) hardware. Copper phantom, representing a high conductivity material, was placed into the measurement region of interest. The initial ...

    • An introduction of two differential excitation potentials technique in electrical capacitance tomography 

      Elmy Johana, Mohamad, Dr.; Ruzairi, Abdul Rahim, Prof. Dr.; Leow, Pei Ling, Dr.; Mohd Hafiz Fazalul, Rahiman, Dr.; Omar Mohd Faizan, Marwah; Nor Muzakkir, Nor Ayob; Herlina, Abdul Rahim, Dr.; Fazlul Rahman, Mohd Yunus (Elsevier B.V., 2012-06)
      The investigation of this work is to analyse the sensitivity distributions using single and two differential excitation potentials techniques in order to improve the situation of: (1) non-uniform sensitivity distribution; ...

    • Magnetic induction tomography modeling in biological tissue imaging using two-port network technique 

      Muhammad Saiful Badri, Mansor; Mohd Fahajumi, Jumaah; Zulkarnay, Zakaria; Ruzairi, Abdul Rahim, Prof. Dr. ; Nor Muzakkir, Nor Ayob; Khairul Hamimah, Abbas; Siti Zarina, Mohd Muji; Sazali, Yaacob, Prof. Dr.; Herlina, Abdul Rahim, Dr.; Loew,  Pei Ling, Dr. (International Frequency Sensor Association (IFSA), 2013)
      Magnetic Induction Tomography (MIT) is a non-invasive and non-intrusive imaging technique which interested in passive electrical properties of a material that are permittivity, permeability and conductivity. MIT applies ...

    • Micropump pattern replication using Printed Circuit Board (PCB) technology 

      Pei, Song Chee; Rashidah @ Siti Saedah, Arsat, Dr.; Uda, Hashim, Prof. Dr.; Ruzairi, Abdul Rahim, Prof. Dr.; Loew, Pei Ling, Dr. (Taylor and Francis Group, LLC., 2013-06-01)
      This article shows a low-cost rapid hot embossing poly (methylmeth acrylate) (PMMA)-based micropump replication with printed circuit board (PCB) mold. PCB material offers advantages of low cost, rigid, and rapid thermal ...

    • Modular architecture of a non-contact pinch actuation micropump 

      Chee, Pei Song; Rashidah, Arsat. Dr.; Tijjani Adam, Shuwa; Uda, Hashim, Prof. Dr.; Ruzairi, Abdul Rahim, Prof. Dr.; Leow, Pei Ling (MDPI, Basel, Switzerland., 2012-09)
      This paper demonstrates a modular architecture of a non-contact actuation micropump setup. Rapid hot embossing prototyping was employed in micropump fabrication by using printed circuit board (PCB) as a mold material in ...

    • Novel in-house fabrication of nano lab-on-chip devices 

      Tijjani Adam, Shuwa; Uda, Hashim, Prof. Dr.; Dhahi, Th Sabar; Leow, Pei Ling; Chee, Pei Song (Bentham Science Publishers, 2013)
      20nm SiNWs transducers have been fabricated by means of simple in-house fabrication method. A low cost, simple top-down approach has been successfully used for the fabrication of very sensitive SiNWs. The fabrication was ...

    • Performance of hexagon Au electrode on ZnO thin film schottky diode gas sensor 

      Mas Elyza, Mohd Azol; Mahnaz, Shafiei, Dr.; Loew,  Pei Ling, Dr.; Foo, Kai Loong; Uda, Hashim, Prof. Dr.; Rashidah @ Siti Saedah, Arsat, Dr. (International Frequency Sensor Association (IFSA), 2013)
      This paper presents an analysis of Schottky diode performance with the utilization of zinc oxide (ZnO) thin film as a gas sensor. The presented device is implemented with new type of electrode shape which is hexagon compared ...

    • Polysilicon nanowire fabrication as a transducer for fast reaction assays in nano lab-on-chip domain 

      Tijjani Adam, Shuwa; Uda, Hashim, Prof. Dr.; Dhahi, Th Sabar; Foo, Kai Loong; Leow, Pei Ling; Chee, Pei Song (American Scientific Publishers, 2013-02)
      The difficulty with the treatment of cancer is caused by lack of ability to detect the tumor associated with the disease at the early stage. Often, cancer is detected in its later stages, when it has compromised the function ...

    • Segmented capacitance tomography electrodes: A design and experimental verifications 

      Elmy Johana, Mohamad, Dr.; Ruzairi, Abdul Rahim, Prof. Dr.; Leow, Pei Ling, Dr.; Mohd Hafiz Fazalul, Rahiman, Dr.; Omar Mohd Faizan, Marwah; Nor Muzakkir, Nor Ayob (Institute of Electrical and Electronics Engineers (IEEE), 2012-05)
      A segmented capacitance tomography system for real-time imaging of multiphase flows is developed and presented in this work. The earlier research shows that the electrical tomography (ECT) system is applicable in flow ...

    • Selection of optimal parameters in fabrication of poly (dimethylsiloxane) microfluidics using taguchi method 

      Tijjani Adam, Shuwa; Uda, Hashim, Prof. Dr.; Leow, Pei Ling; Foo, Kai Loong; Chee, Pei Song (American Scientific Publishers, 2013-01)
      The excellent performance and achievements by the microfluidics systems at fluid flow manipulation in the recent years have ignited the passion and interest of many researchers around the world, Since a microfluidic is ...

    • Sensor modeling for portable Electrical Capacitance Tomography system using simulation by COMSOL Multiphysics 

      Elmy Johana, Mohamad, Dr.; Muhammad Afiq Zimam, Mohamed; Ruzairi, Abdul Rahim, Prof. Dr.; Leow, Pei Ling, Dr.; Mohd Hafiz Fazalul, Rahiman, Dr.; Khairul Hamimah, Abas; Salinda, Bunyamin (Innovative Computing, Information and Control (ICIC) International, 2012-10)
      This work presents the development process for modeling a 16-segmented portable ECT (Electrical Capacitance Tomography) sensor (using FEM software package COMSOL Multiphysics). The physical sensors are 3D dimensional but ...

    • Study on wireless sensor based industrial tomography systems 

      Chiew, Loon Goh; Nor Muzakkir, Nor Ayob; Ruzairi, Abdul Rahim, Prof. Dr.; Herlina, Abdul Rahim, Dr.; Muhammad Jaysuman, Pusppanathan; Mohd Hafiz, Fazalul Rahiman, Dr.; Loew,  Pei Ling, Dr.; Zulkarnay, Zakaria (International Frequency Sensor Association Publishing (IFSA), 2013)
      Wireless sensor technologies are promising in the field of industrial tomography system, to visualize the cross-sectional images of an industrial flow process. The aim of the paper is to review the technical and scientific ...

    • Ultrasonic tomography imaging for liquid-gas flow measurement 

      Muhammad Jaysuman, Pusppanathan; Nor Muzakkir, Nor Ayob; Fazlul Rahman, Mohd Yunus; Khairul Hamimah, Abbas; Herlina, Abdul Rahim, Dr.; Loew,  Pei Ling, Dr.; Ruzairi, Abdul Rahim, Prof. Dr. ; Fatin Aliah, Phang Abdullah, Dr.; Mohd Hafiz, Fazalul Rahiman, Dr.; Zulkarnay, Zakaria (International Frequency Sensor Association (IFSA), 2013)
      This research was carried out to measure two-phase liquid - gas flow regime by using a dual functionality ultrasonic transducer. Comparing to the common separated transmitter-receiver ultrasonic pairs transducer, the dual ...