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Jan-Yi Lin,Mei-Chen Lin,Yan-Yu Lin,Ting An Lin,Chen-Hung Huang,Ching-Wen Lou,Jia-Horng Lin 한국섬유공학회 2021 Fibers and polymers Vol.22 No.3
In this study, the coating process is employed on metal wire to help improve the friction resistant property ofcarbon fibers, thereby provides more application feasibility. The yarn coating technique for reinforcement and woven fabricprocess are used to produce carbon/stainless steel/polyester/polypropylene/acrylic (CSPPA) woven fabrics that arecharacterized with softness and a light weight. The constituent coated yarns exhibit good conductivity after being coated witha PP layer, and likewise strengthen the woven fabrics in terms of mechanical behavior of tensile strength, elongation, bendingtorsion, creep resistance, and wear-resistant properties. The test results indicate that in the woven process, samples retaingood morphology. Due to PP sheath, the tensile strength of woven fabrics increases from 23 MPa to 42 MPa. Although thelamination layer numbers does not improve the EMI SE of woven fabrics, the EMI SE still reaches over 40 dB. Themanufacturing design proposed in this study provides an innovative finishing for carbon fibers without affecting the intrinsicproperties, and provides a greater range of application for carbon fibers.
Mei-Chen Lin,Ching-Wen Lou,Jan-Yi Lin,Ting An Lin,Shih-Peng Wen,Jia-Horng Lin 한국섬유공학회 2019 Fibers and polymers Vol.20 No.2
This study combines and twists 75D polyester (PET) multi-filaments and polylactic acid (PLA) multi-filaments with twist coefficients of 2, 3, 4, 5, and 6 to form 150D PET/PLA plied yarns. The 0.08-mm-diameter stainless steel (SS) fibers are made into SS braids with a 60-tooth braid gear and a take-up gear with 60, 70, 80, 90, or 100 teeth. PET/PLA plied yarn and SS braids are then combined and electrochemically treated with an electric current of 100, 200, 300, 400, or 500 mA at 60 ℃ for 24 hours, forming the PET/PLA/SS composite bone scaffolds. PET/PLA/SS composite bone scaffolds are observed by scanning electron microscope (SEM) and energy dispersive spectroscope (EDS), and tested for weight increase rate and biocompatibility. The experiment results show that the optimal twist coefficient for PET/PLA plied yarn is 4 and the optimal tooth number on the take-up gear for SS braids is 80. SEM observation result shows that hydroxyapatite (HA) deposits on the surface of PET/PLA/SS composite bone scaffolds and attaches to the PET/PLA plied yarns. Finally, regardless of electric currents, all PET/PLA/SS composite bone scaffolds possess good biocompatibility.
Fabrication of a Biodegradable Multi-layered Polyvinyl Alcohol Stent
Mei-Chen Lin,Ching-Wen Lou,Jan-Yi Lin,Ting An Lin,Yueh-Sheng Chen,Jia-Horng Lin 한국섬유공학회 2018 Fibers and polymers Vol.19 No.8
This study aims to develop biodegradable vascular stents that prevent permanent damage caused by rejection of the immune system of the human body. Polyvinyl alcohol (PVA) yarns are twisted to enhance their strength. The twisted yarns are braided and then coated with chitosan (CS). The CS-coated PVA vascular stents are chemically crosslinked with genipin (GP) to improve their flexibility and biodegradability. Their morphological characteristics are also observed using a stereoscopic microscope, and their properties are evaluated through scanning electron microscopy, Fourier transform infrared, bending test, biodegradability test, drug release measurement, and MTT assay. Results reveal that wet PVA-CS-GP vascular stents coated with multiple CS layers can maintain a tubular structure when they are bent. After crosslinking is performed, the compressive strength of the PVA-CS-GP stents is 17.04 times higher than that of pure PVA. The weight loss rate of the PVA-CS-GP vascular stents as <3 % after 30 days. The PVA-CS-GP vascular stents composed of 0.10 % heparin sodium show a good drug release effect. Biological activity test indicates that these stents exhibit good proliferation, and our structural model verifies that they are good vascular stents.
On The Security of RFID-based Monitoring Mechanism for Retail Inventory Management
( Yu Yi Chen ),( Jinn Ke Jan ),( Meng Lin Tsai ),( Chun Ching Ku ),( Der Chen Huang ) 한국인터넷정보학회 2012 KSII Transactions on Internet and Information Syst Vol.6 No.2
The aim of this article is to provide a study on the issue of inventory inaccuracy and to show the manner in which RFID technology can improve the inventory management performance. The objective of inventory control is to monitor the stock flow of merchandises in order to understand the operating profit and loss. A proper mechanism of inventory control could be made to help the profitability. As RFID is applied to inventory control, it can improve efficiency, enhance accuracy and achieve security. In this paper, we introduce the evolution of different mechanisms of inventory control with RFID system - counting method, collect-all method, and continuous monitoring method. As for improving the accuracy of inventory check during business hours, continuous monitoring is the solution. We introduce the infrastructure of the RFID inventory management system based on M2M architecture can make the inventory be efficiently monitored with instant warnings.
Ting An Lin,Yu-Chun Chuang,Jan-Yi Lin,Mei-Chen Lin,Ching-Wen Lou,Keng Siang Sim,Jia-Horng Lin 한국섬유공학회 2020 Fibers and polymers Vol.21 No.10
People have increasingly rising health consciousness in recent years and researchers are thus devoted themselvesto develop multi-functional textile products. In this study, stainless steel (SS) filaments are used for electromagnetic shieldingeffectiveness (EMSE) while polypropylene (PP) filaments are used for ultraviolet resistance and good mechanical properties. Spinning and weaving continuous formation techniques are employed to produce wrapped yarns with SS and PP filaments,after which a weaving process is employed for the preparation of SS/PP woven fabrics. The woven fabrics are tested forEMSE and UV resistance, examining the effect of the lamination-layer numbers and lamination-layer angles. Test resultsshow that the optimal EMSE and UV resistance occur when SS/PP woven fabrics are laminated with two layers at 90 °. Notonly focus on the mechanical performance, the proposed woven fabrics with good EMSE, UV resistance, and a light weight,and are good candidate for a variety of application as required. The proposed UV resistance and EMSE woven fabricssignificantly increase the additional values of traditional textiles.
Yu-Hsuan Lu,Dan Chen,Sheng-Fu Hsiao,Ching-Jan Chen,Hung-Shou Nien 전력전자학회 2015 ICPE(ISPE)논문집 Vol.2015 No.6
In recent years, the ripple-based constant on-time (RBCOT) control scheme for voltage regulators has been adopted in many applications because of its high efficiency feature under light-load conditions. However, a RBCOT control suffers from output-voltage offset problem. Therefore, an offset correction circuit (OC) is often added to the basic RBCOT scheme to correct the problem. In the OC circuit, there is a RC filter. The size of this RC filter not only affects the circuit stability and converter transient responses but also directly affects the controller chip size/cost. The main focus of the present paper is to investigate the relationship between the RC filter value and the feedback stability so that RC value can be minimized while avoiding circuit instability. A time-domain analysis approach is proposed to model OCRBCOT scheme for a buck converter configuration. Experimental and simulation results are given for verification.
Yi‑Chia Kuan,Venkatesan Thiruvengadam,Jia‑Shin Lin,Jia‑Hsin Liu,Tsan‑Jan Chen,Hsin‑Mao Wu,Wen‑Ching Wang,Liang‑Jwu Chen 한국식물생명공학회 2018 Plant biotechnology reports Vol.12 No.1
The broad-specificity amino acid racemase (Bsar) from Pseudomonas putida catalyzes the racemization of various amino acids, offering a flexible and feasible platform to develop a new non-antibiotic selectable marker system for plant transformation. In the present study, we demonstrated that a Bsar variant, Bsar-R174K, that is useful as a selectable marker gene in Arabidopsis and rice that were susceptible to l-lysine and D-alanine. The introduction of wild-type Bsar, Bsar-R174K or Bsar-R174A into E. coli lysine or asparagine auxotrophs was able to rescue the growth of these microorganisms in minimal media supplemented with selectable amino acid enantiomers. The transformation of Arabidopsis with Bsar or Bsar variants based on d-alanine selection revealed that Bsar-R174K had the greatest efficiency (2.40%), superior to kanamycin selectionbased transformation (1.10%). Whereas, l-lysine-based selection exhibited lower efficiency for Bsar-R174K (0.17%). The progenies of selected Bsar-R174K transgenic Arabidopsis revealed normal growth properties. In addition, Bsar-R174K transgenic rice was obtained on l-lysine medium with an efficiency of 0.9%, and the progenies of the transgenic rice revealed morphologically normal phenotypes comparable with their wild-type counterparts. This study presents the first report of broad range amino acid racemase Bsar-R174K as a non-antibiotic selectable marker system applied in transgenic plants.