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Ming‑Wei Wu,Jhewn‑Kuang Chen,Mo‑Kai Tsai,Pei Wang,Tien‑Lin Cheng,Bo‑Huan Lin,Po‑Hsing Chiang,Annadurai Dhinakar 대한금속·재료학회 2022 METALS AND MATERIALS International Vol.28 No.1
The selective laser melted (SLM) Ti–6Al–4V cellular solid is a promising material in biomedical and other applications. The mechanical properties of the SLM Ti–6Al–4V cellular material are predominantly controlled by the design of the cellular structure. The objective of this study was to investigate the uniaxial compressive properties and compressive fatigueperformance of the SLM Ti–6Al–4V cellular solid with a new cuboctahedron unit cell reinforced by four diagonal strutsand two horizontal struts along the X and Y axes. The infuences of hot isostatic pressing (HIP) on the various mechanicalproperties were also examined. The results showed a smoother stress–strain curve and fewer stress oscillations in the HIPspecimen than in the SLM specimen. The HIP process slightly decreased the yield strength of the SLM sample from 55 to52 MPa. Under uniaxial compressive stress, the SLM and HIP specimens exhibited layer-by-layer fracture and diagonalshear fracture, respectively. Furthermore, the HIP treatment signifcantly increased the fatigue performance and improved thefatigue endurance ratio at 106cycles from 0.15 to 0.35. The HIP treatment contributed to several positive efects, includingphase transformation from brittle α′ to α + β, the elimination of strut porosity and residual stress, an increase in lath size,and a better combination of strength and ductility, thereby improving the fatigue performance. The efects of stress mode onthe fracture mechanism were also clarifed using in situ observation in combination with digital image correlation.
The Measurement of People’s Satisfaction on Public Safety and Police Service
Chang Charles (Kuang-Ming),Wang Tsu-Shea 아시아경찰학회 2006 Asia Pacific Journal of Police & Criminal Justice Vol.4 No.1
In American police history, supervisor’s judgment, crime reports and public opinion investigation have been used as indicators to measure police performance. Contemporarily, public opinion investigation is the most important indicator because it is the instrument to measure citizen satisfaction, a major dimension of police performance in community problem-solving era.<BR> Page and Shapiro (1992) noted that public opinion is rational and stable; public opinion does change, but the change is incremental and predictable; a sudden change of public opinion can be traced to a certain events. Longitudinal data of polls conducted by independent institutions demonstrated that Taiwanese attitude and perception toward public safety is stable, incremental and predictable too. This paper shows the national trend of polls on Taiwanese sense of public safety. In addition, differences among counties and cities will be compared.
Ming-Cheng Wu,Kuang-Hui Lu 한국응용곤충학회 2014 Journal of Asia-Pacific Entomology Vol.17 No.3
The juvenile hormone titer during the last instar is a crucial determining switch for metamorphosis inlepidopterans.Wepreviously observed that the induction of glutathione S-transferase (GST) activity by a juvenilehormone analog (JHA) is reversely proportional to the occurrence of JHA-induced supernumerary instarsfollowing topical application of JHA to Spodoptera litura during the last instar period. In this paper, at least fiveJHA-induced GSTs were purified by glutathione-affinity chromatography, and one was further isolated fordetermination of the N-terminal sequence. The corresponding cDNA was cloned and named SlGST1 (GenBankaccession no. AY506545). SlGST1 was classified into the epsilon class of GSTs by phylogenetic analysis. Northernblot analyses further showed that the SlGST1 in fat bodies can be induced by JHA, particularly in 0-day-old sixthinstarlarvae, in which induction was much higher than that in 1- and 2-day-old sixth-instar larvae. To ourknowledge, this is the first JHA-inducible GST to have been identified, and we believe that it will provide newinsight into the role of GST in insect development, particularly during metamorphosis.
Max-throughput interference avoidance mechanism for indoor self-organizing small cell networks
Kuang-Hsun Lin,Cho-Hsin Tsai,Jen-Wei Chang,Yu-Chieh Chen,Hung-Yu Wei,Fu-Ming Yeh 한국통신학회 2017 ICT Express Vol.3 No.3
Since mobile traffic has been growing recently, the deployment of indoor small cells has become an attractive solution to enhance coverage. However, the increasing density of cells makes inter-cell interference more considerable. In this paper, we propose a max-throughput Interference Avoidance (MTIA) centralized algorithm to improve the system’s throughput. Based on signaling and reports, a central controller connected to each base station can properly turn off base stations that may induce a relatively strong interference, and thus increase SINR. We implemented the MTIA algorithm in an LTE TDD network simulation and showed that MTIA effectively reduces inter-cell interference and improves the system’s throughput.
A Decomposition Approach for Fixed Channel Assignment Problems in Large-Scale Cellular Networks
Jin, Ming-Hui,Wu, Eric Hsiao-Kuang,Horng, Jorng-Tzong The Korea Institute of Information and Commucation 2003 Journal of communications and networks Vol.5 No.1
Due to insufficient available bandwidth resources and the continuously growing demand for cellular communication services, the channel assignment problem has become increasingly important. To trace the optimal assignment, several heuristic strategies have been proposed. So far, most of them focus on the small-scale systems containing no more than 25 cells and they use an anachronistic cost model, which does not satisfy the requirements ity. Solving the small-scale channel assignment problems could not be applied into existing large scale cellular networks' practice. This article proposes a decomposition approach to solve the fixed channel assignment problem (FCAP) for large-scale cellular networks through partitioning the whole cellular network into several smaller sub-networks and then designing a sequential branch-and-bound algorithm that is made to solve the FCAP for them sequentially. The key issue of partition is to minimize the dependences of the sub-networks so that the proposed heuristics for solving smaller problems will suffer fewer constraints in searching for better assignments. The proposed algorithms perform well based on experimental results and they were applied to the Taiwan Cellular Cooperation (TCC) in ChungLi city to find better assignments for its network.
Reducing Hysteresis Effect of Force Actuator in a Scanning Probe Microscope
Po-Kuang Chang,Jium-Ming Lin 제어로봇시스템학회 2009 제어로봇시스템학회 국제학술대회 논문집 Vol.2009 No.8
This research is to use only PI controllers to reduce the hysteresis effect of a force actuator for a Scanning Probe Microscope (SPM). Comparisons with the previous design with Linear Velocity Transducer (LVT) for inner-loop feedback compensation are also made. Generally, the phase margins are larger for the newly proposed method. This improvement has been verified by MATLAB simulation and practical implementation to reduce the hysteresis effect of the force actuator. Thus the new design is cheaper and valuable.
The study of Harvest System for Organic Perishable Vegetable in Plugs
( Jia-ming Yang ),( Xie-zhi Li ),( Kuang-wen Hsieh ) 한국농업기계학회 2018 한국농업기계학회 학술발표논문집 Vol.23 No.1
Vegetable is the indispensable food for the daily life of mankind. Due to the demand for increasing the quality of vegetable in Taiwan, the protected culture must be developed for cultivation of vegetable. There are two common approaches of cultivation, including seeding and plug transplant, and both approaches require much labor. By applying the Organic Perishable Vegetable in Plugs planted, the labor problem in the past for plug seeding, sprout cultivation, transplantation and harvesting could be improved. Besides, the yield and quality could be increased. However, the short of labor is still a major problem for harvesting. This study would develop a set of harvesting machinery that is applicable for Organic Perishable Vegetable in Plugs. This could reduce the time and labor for harvesting in fields, and reach the objectives of saving of labor and increasing the productivity.
Che-Sheng Chu,Chih-Kuang Liang,Ming-Yueh Chou,Yu-Te Lin,Chien-Jen Hsu,Chin-Liang Chu,Po-Han Chou 대한신경정신의학회 2016 PSYCHIATRY INVESTIGATION Vol.13 No.3
ObjectiveaaPostoperative delirium (POD) is a highly prevalent complex neuropsychiatric syndrome in elderly patients. However, its pathophysiology is currently unknown. Early detection and prevention of POD is important; therefore, the aim of this study was to investigate the link between preoperative insulin growth factor 1 (IGF-1) levels in the serum and POD in the Chinese elderly patients. MethodsaaOne hundred and three patients who were undergoing an orthopedic operation took part in the study. Preoperative serum IGF-1 levels were measured. POD was determined daily using the Confusion Assessment Method (CAM) and DSM-IV TR. Baseline serum IGF-1 levels were compared between patients who did and did not develop POD. Correlation coefficients were calculated to evaluate relationship between baseline characteristics and serum IGF-1 levels. The relationship between baseline biomarkers and delirium status was investigated using logistic regression analysis, adjusting for potential confounding variables. ResultsaaTwenty-three patients developed POD. The POD group had lower MMSE scores and higher CCI scores and proportions of acute admission. Preoperative serum IGF-1 levels were correlated with MMSE scores and age (MMSE: r=0.230, p<0.05; age: r=-0.419, p<0.001). Baseline serum IGF-1 levels did not differ between patients who did and did not develop POD, even after adjusting for potential confounding factors, MMSE score, and age. ConclusionaaNo association was found between preoperative IGF-1 levels and POD, suggesting that they are not direct biomarkers of the incidence of POD among the Chinese elderly population. Further research with larger sample sizes is warranted to clarify the relationship.