Browsing by Author "Lin, Chun-Chang"

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APPLYING THE AHP TO SUPPORT THE BEST-VALUE CONTRACTOR SELECTION - LESSONS LEARNED FROM TWO CASE STUDIES IN TAIWAN
(2013)
Wang, Wei-Chih
;
Yu, Wen-der
;
Yang, I-Tung
;
Lin, Chun-Chang
;
Lee, Ming-Tsung
Lately the Best-Value (BV) method for contractor selection has been receiving considerable attention in the public sector in many countries. However, the operations used in performing the BV method often differ due to the various government procurement requirements. Consequently, some of the methods popular in the academic community are not easily incorporated in the BV method in some countries. To enhance the procurement process, this study aims to gain experience by applying the well-known analytical hierarchy process (AHP) to weight the decision criteria for selecting BV contractors of two construction projects in Taiwan. Through these two case studies, this work confirms that the AHP provides a significant benefit for considering the individual preferences of all decision-makers when weighting the criteria. However, this study finds two major potential obstacles, the legal requirements associated with using the AHP and the time it takes to implement the AHP. To overcome these obstacles, this work suggests guidelines to meet the legal requirements for implementing the AHP in the BV contractor selection, and proposes several strategies to shorten the AHP implementation time. The lessons learned here are relevant to those countries in which BV method must be performed in a transparent and strictly regulated environment.
Evaluating bid item prices to support contractor selection - A case study
(2007-06-01)
Lin, Chun-Chang
;
Wang, Wei-Chih
;
Yang, Jyh-Bin
;
土木工程學系
;
Department of Civil Engineering
Bid price is a highly-weighted appraisal criterion in a multi-criteria evaluation method to select contractors for construction projects. By evaluating both the magnitude and reasonableness of the bid price, this study presents an electronically-facilitated model for evaluating bid prices. The model defines a reasonable total price for a project and a reasonable cost for each cost category (or bid item) by considering the project prices estimated by the project owner and submitted by all qualified bidders. Scoring systems are then employed to score the prices submitted by bidders, and weighting methods are used to integrate the derived scores. The bidder with the highest integrated score receives the most favorable price appraisal. The merits of the proposed model are demonstrated by its successful application to a recent public construction project in Taiwan.
Spontaneously Micropatterned Silk/Gelatin Scaffolds with Topographical, Biological, and Electrical Stimuli for Neuronal Regulation
(2020-02-01)
Lin, Chun-Chang
;
Chang, Jing-Jing
;
Yung, Ming-Chi
;
Huang, Wei-Chen
;
Chen, San-Yuan
Effective integration of stimulation and direction in bionic scaffolds by materials and microstructure design has been the focus in the advancement of nerve regeneration. Hydrogels are the most promising biomimicked materials used in developing nerve grafts, but the highly hydrated networks limit the fabrication of hydrogel materials into complex biomedical devices. Herein, facile lithography-free and spontaneously micropatterned techniques were used to fabricate a smart protein hydrogel-based scaffold, which carried topographical, electrical, and chemical induction for neural regulation. The synthesized tissue-mimicked silk-gelatin (SG)/polylactic acid bilayer system can self-form three-dimensional ordered corrugation micropatterns with well-defined dimensions (wavelength, lambda) based on the stress-induced topography. Through magnetically and topographically guided deposition of the synthesized nerve growth factor-incorporated Fe3O4-graphene nanoparticles (GFPNs), a biologically and electrically conductive cell passage with one-dimensional directionality was constructed to allow for a controllable constrained geometric effect on neuronal adhesion, differentiation, and neurite orientation. Particularly, the SG with corrugation patterns of lambda approximate to 30 mu m resulted in the optimal cell adhesion and differentiation in response to the pattern guidance. Furthermore, the additional electrical stimulation applied on GFPN-deposited SG resulted in a 1.5-fold increase in the neurite elongation by day 7, finally leading to the neuronal connection by day 21. Such a hydrogel device with synergistic effects of physical and chemical enhancement on neuronal activity provides an expectable opportunity in the development of next-generation nerve conduits.