zahari taha - Academia.edu (original) (raw)
Papers by zahari taha
Small and medium enterprises (SMEs) are the driving engine behind economic growth. While SMEs pla... more Small and medium enterprises (SMEs) are the driving engine behind economic growth. While SMEs play a critical role in generating employment and supporting trade, they face numerous challenges, the prominent among them are the need to respond to fasting time-to-market, low-cost and rapid solutions to complex organizational problems. Towards that end, research and development (R & D) aspect deserves particular attention to promote and facilitate the operations of SMEs. Virtual R & D team could be a viable option. However, literature shows that virtual R & D teaming in SMEs is still at its infancy. This article provides a comprehensive literature review on different aspects of virtual R & D teams collected from the reputed publications. The purpose of the state-of-the-art literature review is to provide an overview on the structure and dynamics of R & D collaboration in SMEs. Specifying the foundation and importance of virtual teams, the relationship between virtual R & D team and SMEs has been examined. It concludes with the identification of the gaps in the existing literatures and calls for future research. It is argued that setting-up an infrastructure for virtual R & D team in SMEs still requires a large amount of engineering efforts and deserves consideration at top level management.
Journal of Intelligent Manufacturing, 1999
This paper describes the initial development of a computer based Rapid Prototyping Design Advice ... more This paper describes the initial development of a computer based Rapid Prototyping Design Advice System. The system is intended to assist the designer or project manager, particularly those in small and medium sized companies, in planning the prototyping stage of product development. It provides the user with an efficient and user friendly development aid which uses information obtained from the user and Computer Aided Design data to recommend suitable rapid prototyping solutions.
... Fauzy Ahmad5, V. Chelliah4, Zahari Taha3, Abd. ... Putra Malaysia (UPM), 2Universiti Kebangsa... more ... Fauzy Ahmad5, V. Chelliah4, Zahari Taha3, Abd. ... Putra Malaysia (UPM), 2Universiti Kebangsaan Malaysia (UKM), 3Universiti Malaya (UM), 4Petronas, 5Proton Berhad, 6Universiti Teknologi Petronas (UTP), 7Universiti Teknologi Malaysia (UTM), 8Universiti Teknologi Mara ...
Journal of Advanced Computational Intelligence and Intelligent Informatics, 2010
Page 1. UNIVERSIDADE TÉCNICA DE LISBOA INSTITUTO SUPERIOR TÉCNICO Omnidirectional Vision for Mobi... more Page 1. UNIVERSIDADE TÉCNICA DE LISBOA INSTITUTO SUPERIOR TÉCNICO Omnidirectional Vision for Mobile Robot Navigation José António da Cruz Pinto Gaspar (Mestre) Dissertaçao para a obtençao do Grau de ...
Journal of Advanced Computational Intelligence and Intelligent Informatics, 2008
This research presents a fuzzy controller technique in navigation with obstacle avoidance for a g... more This research presents a fuzzy controller technique in navigation with obstacle avoidance for a general purpose mobile robot in a given global environment with image processing technique using Open Source Computer Vision (OpenCV) library on Visual C++. Fuzzy Logic is used to control the navigation of the robot towards the goal while avoiding obstacles along the way by changing its direction of movement. The positions of the mobile robot, obstacle and the destination are taken into consideration and an overhead camera (above the robot's environment) is used to gather these necessary information. The images captured are processed using different techniques to get the desired positions and is directly integrated with the fuzzy controller making the algorithm more efficient compared to other vision-guided navigation techniques.
Journal of Zhejiang University Science, 2010
Surface roughness is an important parameter for ensuring that the dimension of geometry is within... more Surface roughness is an important parameter for ensuring that the dimension of geometry is within the permitted tolerance. The ideal surface roughness is determined by the feed rate and the geometry of the tool. However, several uncontrollable factors including work material factors, tool angle, and machine tool vibration, may also influence surface roughness. The objective of this study was to compare the measured surface roughness (from experiment) to the theoretical surface roughness (from theoretical calculation) and to investigate the surface roughness resulting from two types of insert, ‘C’ type and ‘T’ type. The experiment was focused on the turning process, using a lathe machine Colchester 6000. The feed rate was varied within the recommended feed rate range. We found that there were large deviations between the measured and theoretical surface roughness at a low feed rate (0.05 mm/r) from the application of both inserts. A work material factor of AISI D2 steel that affects the chip character is presumably responsible for this phenomenon. Interestingly, at a high feed rate (0.4 mm/r), the ‘C’ type insert resulted in 40% lower roughness compared to the ‘T’ type due to the difference in insert geometry. This study shows that the geometry of an insert may result in a different surface quality at a particular level of feed rate.
Natural gas is an alternative to gasoline as a fuel for automotive engines. The combustion of nat... more Natural gas is an alternative to gasoline as a fuel for automotive engines. The combustion of natural gas produces mainly water and CO2 and significantly less CO and UHC emissions. In many cases, CNG vehicles generate fewer exhaust and greenhouse gas emissions than their gasoline or diesel-powered counterparts. While it is clean burning and in plentiful supply with a reasonably even global distribution, its drawback is that it is less energy dense than petrol and so has required either a large tank or a reduced driving range Using it in conjunction with electric drive as in an electric hybrid vehicle, this disadvantage would be significantly reduced. In this paper we present results of the first stage of our research that is conversion of a gasoline vehicle to run on direct injected compressed natural gas. We also present a proposed scheme for a CNGDI-electric hybrid vehicle.
Journal of Advanced Computational Intelligence and Intelligent Informatics, 2010
One of the factors that contribute to the enhancement of the effectiveness of a Virtual Environme... more One of the factors that contribute to the enhancement of the effectiveness of a Virtual Environment (VE) is the capacity for visual short term memory (VSTM) or memory span. This paper describes an investigation of the memory span of Malaysian population for virtual environment design. Experiments were conducted where number, letters, word, and object or pictures were presented to test subjects. Nineteen University students, (6 males and 13 females) participated in the experiment. Their age is range from 17 to 30 years old. Subjects were asked to observe a group of numbers and letters for ten seconds as well as words for sixty seconds and objects or pictures for thirty second and to write down all the numbers, letters, words and pictures that they have seen during thirty seconds. The two tailed t test is conducted to test the difference of memory span between the male and female population. The result shows that there is no different between the capacity of visual short term memory Malaysian of the male and female population. The memory span was found to be in the range of 6 and 9 digits for numbers, 5 and 10 alphabets for letters, 5 and 11 strings for words, and 6 and 11 items for objects or pictures.
... According to Ivowi (1997), lack of confidence as a result of inadequate preparation, peer inf... more ... According to Ivowi (1997), lack of confidence as a result of inadequate preparation, peer influence, societal influence, parental support and poor facilities in schools are some of the factors responsible for examination malpractices. ...
Electronic copy available at: http://ssrn.com/abstract=1530904 ... Scientific Research and Essays... more Electronic copy available at: http://ssrn.com/abstract=1530904 ... Scientific Research and Essays Vol. 4 (13), pp. 1575-1590, December, 2009 Available online at http://www.academicjournals .org/SRE ISSN 1992-2248 © 2009 Academic Journals ... Virtual R & D teams in small ...
New interaction tools such as internet allows companies to gain valuable input from research and ... more New interaction tools such as internet allows companies to gain valuable input from research and development (R&D) engineers via virtual teams. Consequently engineers also get more expertise in diminutive timeframes. Virtual R&D teams present the key impetus to the technology acquisition process. The present knowledge-economy era is characterized by short product life-cycles. Virtual R&D teams may reduce time-tomarket, make available a large pool of new product know-how and provide greater flexibilities which are the key success factors in a competitive market. This comprehensive review contains almost 100 references and covers the recent literature with emphasis on topic.
The number of small and medium enterprises (SMEs), especially those involved with research and de... more The number of small and medium enterprises (SMEs), especially those involved with research and development (R&D) programs and employed virtual teams to create the greatest competitive advantage from limited labor are increasing. Global and localized virtual R&D teams are believed to have a high potential for SMEs growth. Due to the fast growing complexity of the new product, coupled with new emerging opportunities of virtual teams, a collaborative approach is believed to be the future trend. This research explores the effectiveness of virtuality in SMEs virtual R&D teams. An online questionnaire emailed to Malaysian manufacturing SMEs and 74 usable questionnaires were received, representing a 20.8 percent return rate. To avoid the bias that may result from pre-suggested answer, a series of open-ended questions asked from expertise. This study based on analyzing an open-ended question; extract four main themes among expertise recommendations on the effectiveness of virtual teams for SMEs growth and performance. These are suitable for SMEs new product design manager to realize the key advantage and importance of virtual R&D teams in the process of NPD, which lead to increase the effectiveness of the new product's procedure.
In the competitive ma rke t , virtual teams repres ent a growing res pons e to the need for fas t... more In the competitive ma rke t , virtual teams repres ent a growing res pons e to the need for fas tin g time-to -ma r k et, low-co s t an d rap id s o lu tio n s to co mp lex o rg an izatio n al pro b lems . Virtu al teams en ab le o rg an izatio n s to p o o l th e talen ts an d exp ertis e o f emp lo y ees an d n o n-emp lo y ees b y elimin atin g time an d s p ace b arriers . No wad ay s co mp an ies are heav ily inv es tin g in v ir t u a l team to en h an ce th eir performance and competitiveness. Despite virtual team growing prevalence, relatively little is known ab o u t th is n ew fo rm of team. Hen ce th e s tu d y o ffers an exten s iv e literatu re rev iew with d e f in itio n s o f virtual teams and a structured analysis of the present body of knowledge of virtual teams. First, we dis tinguis h virtual tea ms from conventional teams , different types of virtual teams to identify where current knowledge applies. Second, we dis tin g u ish what is needed for effective virtual team considering the people, process and technology point of view and underlying characteristics of virtual teams and challenges the entail. Finally we have identified an d exten d ed 12 key factors that need to be considered, and describes a methodology focused on supporting virtual team working, with a new approach that has not been s pecifically addres s ed in the exis ting literature and s ome guide line for future research extracted.
Journal of Quality in Maintenance Engineering, 2004
Abstract Applications of systems like total quality management (TQM), total productive maintenanc... more Abstract Applications of systems like total quality management (TQM), total productive maintenance (TPM) and just-in-time (JIT) have been studied mainly in large industries with little attention being paid to small and medium industries (SMIs) in developing countries. This paper discusses ...
This paper explores potential advantages and barriers of virtual teams toward making an interrela... more This paper explores potential advantages and barriers of virtual teams toward making an interrelation between small and medium-sized firms (SMEs) with a comprehensive review on different aspects of virtual teams in SMEs based on authentic and reputed publications. The purpose of the state-of-the-art literature review is to provide an overview of what is known about the structure and dynamics of virtual collaboration in SMEs which they are the back bone of the world business. This study seeks to address some of the advantages of virtual R&D team in the existing extensive literature on the increase SMEs interrelations. Besides of identify benefits of virtual R&D team in SMEs, propose the way of further studies and recommend improvements. We argue that the routines used to promote interrelation between SMEs, based on virtual collaboration can sometimes create problems for firms as they ignore new challenges. We elaborate various theories on the virtual R&D team by reviewing the precedent papers.
Journal of Quality in Maintenance Engineering, 2005
Findings It is evident that a well drawn TPM implementation plan not only improves equipment ef... more Findings It is evident that a well drawn TPM implementation plan not only improves equipment efficiency and effectiveness but also brings appreciable improvements in other areas such as reduction of manufacturing cycle time, size of inventory, customer complaints, and creates ...
Innovation plays a central role in economic development, at regional and national level. In the c... more Innovation plays a central role in economic development, at regional and national level. In the competitive environment companies are obliged to produce more rapidly, more effectively and more efficiently in new product development which is a result of research and development (R&D) activities. It is necessary for them to put together different capabilities and services with the goal, through cooperation between suppliers and customers, service providers and scientific institutions to achieve innovations of high quality. Depending on the type of industry, the type of business, the type of innovation and the strategic objectives that have been set, firms will regularly have to modify the way in which their R&D and innovation is organized. Nowadays shift from serial to simultaneous and parallel working in innovation has become more commonplace. Literatures have shown that collaboration is as a meta-capability for innovation. By a comprehensive reviewing of literature this article after define a virtual teams and its characteristics, addressing virtual environments innovation and the relationship to R&D activities. Finally conclude that innovation cannot be successful unless the knowledge and information in the R&D project are effectively captured, shared and internalized by the R&D project's virtual team members.
Small and medium enterprises (SMEs) are the driving engine behind economic growth. While SMEs pla... more Small and medium enterprises (SMEs) are the driving engine behind economic growth. While SMEs play a critical role in generating employment and supporting trade, they face numerous challenges, the prominent among them are the need to respond to fasting time-to-market, low-cost and rapid solutions to complex organizational problems. Towards that end, research and development (R & D) aspect deserves particular attention to promote and facilitate the operations of SMEs. Virtual R & D team could be a viable option. However, literature shows that virtual R & D teaming in SMEs is still at its infancy. This article provides a comprehensive literature review on different aspects of virtual R & D teams collected from the reputed publications. The purpose of the state-of-the-art literature review is to provide an overview on the structure and dynamics of R & D collaboration in SMEs. Specifying the foundation and importance of virtual teams, the relationship between virtual R & D team and SMEs has been examined. It concludes with the identification of the gaps in the existing literatures and calls for future research. It is argued that setting-up an infrastructure for virtual R & D team in SMEs still requires a large amount of engineering efforts and deserves consideration at top level management.
Journal of Intelligent Manufacturing, 1999
This paper describes the initial development of a computer based Rapid Prototyping Design Advice ... more This paper describes the initial development of a computer based Rapid Prototyping Design Advice System. The system is intended to assist the designer or project manager, particularly those in small and medium sized companies, in planning the prototyping stage of product development. It provides the user with an efficient and user friendly development aid which uses information obtained from the user and Computer Aided Design data to recommend suitable rapid prototyping solutions.
... Fauzy Ahmad5, V. Chelliah4, Zahari Taha3, Abd. ... Putra Malaysia (UPM), 2Universiti Kebangsa... more ... Fauzy Ahmad5, V. Chelliah4, Zahari Taha3, Abd. ... Putra Malaysia (UPM), 2Universiti Kebangsaan Malaysia (UKM), 3Universiti Malaya (UM), 4Petronas, 5Proton Berhad, 6Universiti Teknologi Petronas (UTP), 7Universiti Teknologi Malaysia (UTM), 8Universiti Teknologi Mara ...
Journal of Advanced Computational Intelligence and Intelligent Informatics, 2010
Page 1. UNIVERSIDADE TÉCNICA DE LISBOA INSTITUTO SUPERIOR TÉCNICO Omnidirectional Vision for Mobi... more Page 1. UNIVERSIDADE TÉCNICA DE LISBOA INSTITUTO SUPERIOR TÉCNICO Omnidirectional Vision for Mobile Robot Navigation José António da Cruz Pinto Gaspar (Mestre) Dissertaçao para a obtençao do Grau de ...
Journal of Advanced Computational Intelligence and Intelligent Informatics, 2008
This research presents a fuzzy controller technique in navigation with obstacle avoidance for a g... more This research presents a fuzzy controller technique in navigation with obstacle avoidance for a general purpose mobile robot in a given global environment with image processing technique using Open Source Computer Vision (OpenCV) library on Visual C++. Fuzzy Logic is used to control the navigation of the robot towards the goal while avoiding obstacles along the way by changing its direction of movement. The positions of the mobile robot, obstacle and the destination are taken into consideration and an overhead camera (above the robot's environment) is used to gather these necessary information. The images captured are processed using different techniques to get the desired positions and is directly integrated with the fuzzy controller making the algorithm more efficient compared to other vision-guided navigation techniques.
Journal of Zhejiang University Science, 2010
Surface roughness is an important parameter for ensuring that the dimension of geometry is within... more Surface roughness is an important parameter for ensuring that the dimension of geometry is within the permitted tolerance. The ideal surface roughness is determined by the feed rate and the geometry of the tool. However, several uncontrollable factors including work material factors, tool angle, and machine tool vibration, may also influence surface roughness. The objective of this study was to compare the measured surface roughness (from experiment) to the theoretical surface roughness (from theoretical calculation) and to investigate the surface roughness resulting from two types of insert, ‘C’ type and ‘T’ type. The experiment was focused on the turning process, using a lathe machine Colchester 6000. The feed rate was varied within the recommended feed rate range. We found that there were large deviations between the measured and theoretical surface roughness at a low feed rate (0.05 mm/r) from the application of both inserts. A work material factor of AISI D2 steel that affects the chip character is presumably responsible for this phenomenon. Interestingly, at a high feed rate (0.4 mm/r), the ‘C’ type insert resulted in 40% lower roughness compared to the ‘T’ type due to the difference in insert geometry. This study shows that the geometry of an insert may result in a different surface quality at a particular level of feed rate.
Natural gas is an alternative to gasoline as a fuel for automotive engines. The combustion of nat... more Natural gas is an alternative to gasoline as a fuel for automotive engines. The combustion of natural gas produces mainly water and CO2 and significantly less CO and UHC emissions. In many cases, CNG vehicles generate fewer exhaust and greenhouse gas emissions than their gasoline or diesel-powered counterparts. While it is clean burning and in plentiful supply with a reasonably even global distribution, its drawback is that it is less energy dense than petrol and so has required either a large tank or a reduced driving range Using it in conjunction with electric drive as in an electric hybrid vehicle, this disadvantage would be significantly reduced. In this paper we present results of the first stage of our research that is conversion of a gasoline vehicle to run on direct injected compressed natural gas. We also present a proposed scheme for a CNGDI-electric hybrid vehicle.
Journal of Advanced Computational Intelligence and Intelligent Informatics, 2010
One of the factors that contribute to the enhancement of the effectiveness of a Virtual Environme... more One of the factors that contribute to the enhancement of the effectiveness of a Virtual Environment (VE) is the capacity for visual short term memory (VSTM) or memory span. This paper describes an investigation of the memory span of Malaysian population for virtual environment design. Experiments were conducted where number, letters, word, and object or pictures were presented to test subjects. Nineteen University students, (6 males and 13 females) participated in the experiment. Their age is range from 17 to 30 years old. Subjects were asked to observe a group of numbers and letters for ten seconds as well as words for sixty seconds and objects or pictures for thirty second and to write down all the numbers, letters, words and pictures that they have seen during thirty seconds. The two tailed t test is conducted to test the difference of memory span between the male and female population. The result shows that there is no different between the capacity of visual short term memory Malaysian of the male and female population. The memory span was found to be in the range of 6 and 9 digits for numbers, 5 and 10 alphabets for letters, 5 and 11 strings for words, and 6 and 11 items for objects or pictures.
... According to Ivowi (1997), lack of confidence as a result of inadequate preparation, peer inf... more ... According to Ivowi (1997), lack of confidence as a result of inadequate preparation, peer influence, societal influence, parental support and poor facilities in schools are some of the factors responsible for examination malpractices. ...
Electronic copy available at: http://ssrn.com/abstract=1530904 ... Scientific Research and Essays... more Electronic copy available at: http://ssrn.com/abstract=1530904 ... Scientific Research and Essays Vol. 4 (13), pp. 1575-1590, December, 2009 Available online at http://www.academicjournals .org/SRE ISSN 1992-2248 © 2009 Academic Journals ... Virtual R & D teams in small ...
New interaction tools such as internet allows companies to gain valuable input from research and ... more New interaction tools such as internet allows companies to gain valuable input from research and development (R&D) engineers via virtual teams. Consequently engineers also get more expertise in diminutive timeframes. Virtual R&D teams present the key impetus to the technology acquisition process. The present knowledge-economy era is characterized by short product life-cycles. Virtual R&D teams may reduce time-tomarket, make available a large pool of new product know-how and provide greater flexibilities which are the key success factors in a competitive market. This comprehensive review contains almost 100 references and covers the recent literature with emphasis on topic.
The number of small and medium enterprises (SMEs), especially those involved with research and de... more The number of small and medium enterprises (SMEs), especially those involved with research and development (R&D) programs and employed virtual teams to create the greatest competitive advantage from limited labor are increasing. Global and localized virtual R&D teams are believed to have a high potential for SMEs growth. Due to the fast growing complexity of the new product, coupled with new emerging opportunities of virtual teams, a collaborative approach is believed to be the future trend. This research explores the effectiveness of virtuality in SMEs virtual R&D teams. An online questionnaire emailed to Malaysian manufacturing SMEs and 74 usable questionnaires were received, representing a 20.8 percent return rate. To avoid the bias that may result from pre-suggested answer, a series of open-ended questions asked from expertise. This study based on analyzing an open-ended question; extract four main themes among expertise recommendations on the effectiveness of virtual teams for SMEs growth and performance. These are suitable for SMEs new product design manager to realize the key advantage and importance of virtual R&D teams in the process of NPD, which lead to increase the effectiveness of the new product's procedure.
In the competitive ma rke t , virtual teams repres ent a growing res pons e to the need for fas t... more In the competitive ma rke t , virtual teams repres ent a growing res pons e to the need for fas tin g time-to -ma r k et, low-co s t an d rap id s o lu tio n s to co mp lex o rg an izatio n al pro b lems . Virtu al teams en ab le o rg an izatio n s to p o o l th e talen ts an d exp ertis e o f emp lo y ees an d n o n-emp lo y ees b y elimin atin g time an d s p ace b arriers . No wad ay s co mp an ies are heav ily inv es tin g in v ir t u a l team to en h an ce th eir performance and competitiveness. Despite virtual team growing prevalence, relatively little is known ab o u t th is n ew fo rm of team. Hen ce th e s tu d y o ffers an exten s iv e literatu re rev iew with d e f in itio n s o f virtual teams and a structured analysis of the present body of knowledge of virtual teams. First, we dis tinguis h virtual tea ms from conventional teams , different types of virtual teams to identify where current knowledge applies. Second, we dis tin g u ish what is needed for effective virtual team considering the people, process and technology point of view and underlying characteristics of virtual teams and challenges the entail. Finally we have identified an d exten d ed 12 key factors that need to be considered, and describes a methodology focused on supporting virtual team working, with a new approach that has not been s pecifically addres s ed in the exis ting literature and s ome guide line for future research extracted.
Journal of Quality in Maintenance Engineering, 2004
Abstract Applications of systems like total quality management (TQM), total productive maintenanc... more Abstract Applications of systems like total quality management (TQM), total productive maintenance (TPM) and just-in-time (JIT) have been studied mainly in large industries with little attention being paid to small and medium industries (SMIs) in developing countries. This paper discusses ...
This paper explores potential advantages and barriers of virtual teams toward making an interrela... more This paper explores potential advantages and barriers of virtual teams toward making an interrelation between small and medium-sized firms (SMEs) with a comprehensive review on different aspects of virtual teams in SMEs based on authentic and reputed publications. The purpose of the state-of-the-art literature review is to provide an overview of what is known about the structure and dynamics of virtual collaboration in SMEs which they are the back bone of the world business. This study seeks to address some of the advantages of virtual R&D team in the existing extensive literature on the increase SMEs interrelations. Besides of identify benefits of virtual R&D team in SMEs, propose the way of further studies and recommend improvements. We argue that the routines used to promote interrelation between SMEs, based on virtual collaboration can sometimes create problems for firms as they ignore new challenges. We elaborate various theories on the virtual R&D team by reviewing the precedent papers.
Journal of Quality in Maintenance Engineering, 2005
Findings It is evident that a well drawn TPM implementation plan not only improves equipment ef... more Findings It is evident that a well drawn TPM implementation plan not only improves equipment efficiency and effectiveness but also brings appreciable improvements in other areas such as reduction of manufacturing cycle time, size of inventory, customer complaints, and creates ...
Innovation plays a central role in economic development, at regional and national level. In the c... more Innovation plays a central role in economic development, at regional and national level. In the competitive environment companies are obliged to produce more rapidly, more effectively and more efficiently in new product development which is a result of research and development (R&D) activities. It is necessary for them to put together different capabilities and services with the goal, through cooperation between suppliers and customers, service providers and scientific institutions to achieve innovations of high quality. Depending on the type of industry, the type of business, the type of innovation and the strategic objectives that have been set, firms will regularly have to modify the way in which their R&D and innovation is organized. Nowadays shift from serial to simultaneous and parallel working in innovation has become more commonplace. Literatures have shown that collaboration is as a meta-capability for innovation. By a comprehensive reviewing of literature this article after define a virtual teams and its characteristics, addressing virtual environments innovation and the relationship to R&D activities. Finally conclude that innovation cannot be successful unless the knowledge and information in the R&D project are effectively captured, shared and internalized by the R&D project's virtual team members.