Decision support evaluation for building information modeling software selection

Building Information Modeling (BIM) has shift the construction industry into a new approach in development of project.The effectiveness of BIM towards increasing productivity and quality of project has been reported not only in literature yet project report.Thus, there are numerous of BIM software available with different features and function.This trend has created decision problem among the companies to select the best software that fulfill company need and project needs.Hence, a web-based Decision Support System (DSS) application namely topsis4BIM has been developed.This paper presented the evaluation the proposed DSS though using the latest technology such as web 2.0 and cloud technology

Towards the significance of decision aid in Building Information Modeling (BIM) software selection process

Building Information Modeling (BIM) has been considered as a solution in construction industry to numerous problems such as delays, increased lead in times and increased costs. This is due to the concept and characteristic of BIM that will reshaped the way construction project teams work together to increase productivity and improve the final project outcomes (cost, time, quality, safety, functionality, maintainability, etc.).As a result, the construction industry has witnesses numerous of BIM software available in market.Each of this software has offers different function, features. Furthermore, the adoption of BIM required high investment on software, hardware and also training expenses.Thus, there is indentified that there is a need of decision aid for appropriated BIM software selection that fulfill the project needs.However, research indicates that there is limited study attempt to guide decision in BIM software selection problem.Thus, this paper highlight the importance of decision making and support for BIM software selection as it is vital to increase productivity, construction project throughout building lifecycle

CFD SIMULATION OF PASSIVE VORTEX GENERATOR ON SEPARATED FLOW DIFFUSER

The passive vortex generator is a simple and economic flow control device which has shown great potential to solve flow separation problem. In this work, the sub boundary layer vortex generator performance in asymmetrical diffuser of 45 degree angle has been simulated using computational fluid dynamics SST k-w turbulence model was employed to capture the turbulence separation at Reynolds number of 1.1x10 based on flat wall length. The diffuser domain consists of three sections namely inlet, expansion and outlet section. To ensure the fully developed flow at upstream of the diffuser, the inlet section height was fixed to 20 mm. The expansion section was designed with 8.5:1 ratio and diffuser total lengths were equal to 3.2 m. The vortex generator performance has been analyzed based on the effect of varying on height, generator spacing ratio and streamwise position in the diffuser. As a result, the vortex generator height shows strong correlation with separation point. While the device spacing and its position show a positive effect in reducing the reverse velocity amount as well as separation region. The optimized configuration of the vortex generator in the diffuser has been identified as the device height of 4 mm with 2.4 spacing ratio and being placed closed to the expansion section entranc

Conceptual design of fuzzy TOPSIS DSS for building information modeling (BIM)

Building Information Modeling (BIM) is playing a significant role in the development of Construction industry.Evaluation of BIM software selection is one of the key roles in successfully BIM adoption.Currently, there is limited study on BIM software selection. With a great potential for integration of MADM and the current Web 2.0 technology, the development of Web DSS based on TOPSIS is desired to solve this problem. In order to develop an effective DSS, the development of subsystem which is TOPSIS would be integrated with fuzzy element.The proposed of this integration is to deal with the vagueness of decision makers in order to evaluate and rating the software and attributes of BIM software selection.Inteads of use crips value, the decision maker will asked to weight and rating through linguistics.For example Very Low (VL), Low (L), Medium Low (ML), Medium (M), Medium High (MH), High (H) and Very High (VH) will used for wighting asessement in BIM software selection.In order to demostrade this proposed DSS, a real construction project which UTHM Multipurpose hall will be deploy

Criteria Requirement for IBS Vendor Selection

The role of vendor selection in construction procurement was addressed as a crucial process to achieve project objective not only in conventional construction project, but also in IBS project. Due to the promising advantages of IBS, constructions industry has witness numerous of IBS vendor available in Malaysia market. This situation has created a decision problem among the construction company to select the best vendor that fulfils the project need. Several complexities of construction vendor selection were discussed in past studies. Thus, there is a need of decision aid in IBS vendor selection. A discussion of criteria in construction vendor selection has also been presented. As initial step to develop a decision model, a documental analysis was performed to gather the related IBS vendor selection criteria. Literature suggest that construction vendor selection can be grouped into cost, quality, service, buyer and vendor relationship, assurance supply, payment term, and past performance. After gather and filtering criteria from literature, 38 criteria were found related with IBS vendor selection. This set of criteria is essential to further develop research instrument to identify the criteria of IBS vendor selection in the next phase of research

Cruciferous vegetables: dietary phytochemicals for cancer prevention

Relationships between diet and health have attracted attention for centuries; but links between diet and cancer have been a focus only in recent decades. The consumption of diet-containing carcinogens, including polycyclic aromatic hydrocarbons and heterocyclic amines is most closely correlated with increasing cancer risk. Epidemiological evidence strongly suggests that consumption of dietary phytochemicals found in vegetables and fruit can decrease cancer incidence. Among the various vegetables, broccoli and other cruciferous species appear most closely associated with reduced cancer risk in organs such as the colorectum, lung, prostate and breast. The protecting effects against cancer risk have been attributed, at least partly, due to their comparatively high amounts of glucosinolates, which differentiate them from other vegetables. Glucosinolates, a class of sulphur- containing glycosides, present at substantial amounts in cruciferous vegetables, and their breakdown products such as the isothiocyanates, are believed to be responsible for their health benefits. However, the underlying mechanisms responsible for the chemopreventive effect of these compounds are likely to be manifold, possibly concerning very complex interactions, and thus difficult to fully understand. Therefore, this article provides a brief overview about the mechanism of such compounds involved in modulation of carcinogen metabolising enzyme systems

Ionospheric Drift Motions and Velocities at UTHM’s Parit Raja Station During Periods of Low Solar and Geomagnetic Activities

Measurements relating to ionospheric plasma drift have been made by the Wireless and Radio Science Centre (WARAS) at Universiti Tun Hussein Onn Malaysia (UTHM) Parit Raja station in Batu Pahat, Johor, since 2004. This is done using a digital doppler interferometer which allows investigations into the dynamics of the ionosphere at this equatorial station to be carried out. These measurements include Doppler shifts and angles of arrival of the reflected HF signals that also allows simultaneous determination of plasma drift directions, drift distance covered and velocities as well as virtual heights of reflection, from ionospheric scattering point sources embedded within the moving plasma. By employing Doppler inteferometry reception technique at four receivers connected to four square array antennas nearby, it is possible to identify the locations, movements and velocities of the bulk scattering points reflected from the ionospheric F-region from the vertically incident HF waves. These waves are transmitted at frequencies of 6MHz, 7MHz, and 8MHz which cover the local F-layers since the critical frequencies lie between 5.9MHz and 8MHz. This work is based on data collected from the F2-layer of this local station at about 300km of virtual height during the measurement period of 2005

Ionospheric Drift Motions and Velocities at UTHM's Parit Raja Station During Periods of Low Solar and Geomagnetic Activities

Measurements relating to ionospheric plasma drift have been made by the Wireless and Radio Science Centre (WARAS) at Universiti Tun Hussein Onn Malaysia (UTHM) Parit Raja station in Batu Pahat, Johor, since 2004. This is done using a digital doppler interferometer which allows investigations into the dynamics of the ionosphere at this equatorial station to be carried out. These measurements include Doppler shifts and angles of arrival of the reflected HF signals that also allows simultaneous determination of plasma drift directions, drift distance covered and velocities as well as virtual heights of reflection, from ionospheric scattering point sources embedded within the moving plasma. By employing Doppler inteferometry reception technique at four receivers connected to four square array antennas nearby, it is possible to identify the locations, movements and velocities of the bulk scattering points reflected from the ionospheric F-region from the vertically incident HF waves. These waves are transmitted at frequencies of 6MHz, 7MHz, and 8MHz which cover the local F-layers since the critical frequencies lie between 5.9MHz and 8MHz. This work is based on data collected from the F2-layer of this local station at about 300km of virtual height during the measurement period of 2005

Multiwall Carbon Nanotube (MWCNT), MWCNT / Carbon Black (CB) And MWCNT / Silica Hybird Fillers Filled Natural Rubber Nanocomposites

Carbon nanotubes are an intriguing reinforcement for polymers because of their unique mechanical proprties and extremely large surface area per unit volume. this MWCNTs are added in oder to get a sustantial improvement in the physical and mechanical propeties of rubber compound. In these present studies, MWCNTs are added as a filler in natural rubber (NR) matrix