Uniaxial Compression Properties and Compression Fatigue Performance of Selective Laser Melted Ti–6Al–4V Cellular Structure

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.

도연명은거원인재탐 ( 陶淵明隱居原因再探 )

진영명 ( Ying Ming Chen ) 한국중국학회 1995 중국학보 Vol.35 No.1

錢鍾書關干比喩創作的理論體系

陳明舒 한국중국문화학회 2003 中國學論叢 Vol.15 No.-

전종서의 문학이론을 보면 비유에 관한 이론이 많다. 또한 그는 이러한 비유이론을 의도적으로 사용해서 문학 작품을 창조해왔다. 필자는 전종서의 비유에 관한 이론을 7가지로 정리해보았다. 1. '본체'와 '비유체' 사이에 유사점이 있으면 두 사물은 전체적으로 대응관계가 형성될 수 있다. 2. 비유의 최고의 효과를 얻기 위해서는 두 가지의 방법을 사용할 수 있는데, 그 첫 번째는 서로 상관이 없는 것에서 유사성을 밝히는 것이고, 두 번째는 아주 평범한 것에서 평범하지 않은 것을 찾아내는 것이다. 3. '본체'와 '비유체' 사이에 유사점은 연상에 의해 밝힐 수 있다. 4. '비유체'는 다양한 측면과 다양한 특징이 있다. 창작자는 자기의 주관적인 필요에 의해 '비유체'의 어떤 측면을 선택한다. 5. 창작자가 비유라는 수사방법을 통해 주관적인 감정을 표현할 수 있다. 6. 한 가지의 '본체'에 대해 많은 비유를 하는 것은 작가의 다양한 감각을 충분히 표현할 수 있도록 하기 위한 것이다. 7. 좋은 비유는 항상 표면적으로 보기에는 무관한 사물일지 모르지만 심리적인 측면에서 보면 유사성을 찾아낼 수 있다.

從萬券堂看麗元畵檀交流

陳明華 단국대학교 중어중문학과 1988 中國文學報 Vol.- No.6

녹음 구어 제시가 중도정신지체 성인여성의 목욕 능력 개선에 미치는 효과

鄭如意,陳明聰,陳政見 대구대학교 특수교육재활과학연구소 2006 再活科學硏究 Vol.24 No.2

1. This study aimed to explore the effect of recorded auditory prompts on helping an adult with profound mental retardation to take bath independently. 「A-B-C-A-C」design, a kind of single-subject experiment was adopted. Three phases, baseline phase, intervention phase(B): auditory prompt, and intervention phase(C): recorded auditory prompt were included. A female with profound mental retardation participated in the experiment. It took over seven months to finishing the intervention. The results of the experiment indicated that auditory prompts, whether human auditory prompt or recorded prompt, could help the client to take bath more independently. The families of the client also regarded recorded auditory prompt was a feasible solution. Based on the result, there were some suggestions for the further research. 본 연구의 목적은 녹음 구어 제시를 이용해서 극 중도 지능장애 성인 여성 스스로 목욕 동작을 완성 할 수 있도록 도와주는 효과에 대한 연구입니다. 본 연구에 사용하는 연구법은 ⌜A-B-A-C-A-C⌟역 설계이다. 기선기의(A)개입一(B)인공구어제시 개입二(C)녹음 구어 제시로 나누어졌다. 실험기간은 모두 7개월 반이었다. 연구결과는 피 실험자가 스스로 목욕할 때와 비교했을 때 인공구어 제시와 녹음구어 제시는 모두 피 실험자가 목욕 동작을 완성 하는 데에 효과가 있는 것으로 나타났다. 이 외에도 녹음 구어 제시는 피 실험자 가족들도 받아들일 수 있다. 본 연구 결과에 근거해서 연구자들은 미래 응용과 연구에 대한 건의도 제출하였다.

Prevention of Natural Flowering in Pineapple (Ananas comosus) by Shading and Urea Application

Meng-Tzu Lin,Alfred Ming Chen1,Tzong-Shyan Lin,Ching-San Kuan,Ching-Lung Lee,Wen-Ju Yang 한국원예학회 2015 Horticulture, Environment, and Biotechnology Vol.56 No.1

The year-round production of pineapple (Ananas comosus var. comosus) is often interrupted by natural flowering during winter in Taiwan. A stable and promising technique for preventing natural flowering is required. In this study, we have tested the effect of shading and urea application on the flowering of pineapple. Shading 90% of sun light(s) before mid-November delayed the natural flowering of pineapple and the delay was affected by the plant age. For pineapples planted less than 11 month before mid-November, applying 1% urea plus shading treatment (SN) completely inhibited natural flowering. All the flowering-inhibited plants could be forced to flower by applying calcium carbide. Long-term shading might result in a decreased number of fruitlets within a fruit. However, 6 weeks of recovery before forcing flowering was sufficient for plants to produce fruits with quality equal to that of the control plants. In winter, pineapple plants that were prone to flowering tended to accumulate more leaf starch and increase their C/N ratio. The SN treatment increased the leaf nitrogen concentration and thus effectively maintained a low leaf C/N ratio. Furthermore, flowering-inhibited plants exhibited a constantly low level of leaf starch during the winter and their flowering forced by calcium carbide did not accompany with leaf starch accumulation.

Tenofovir Alafenamide for Chronic Hepatitis B Patients with Advanced Fibrosis and Partial Virologic Responses to Oral Nucleos(T)Ide Analogues- Interim Report

( Ming-lung Yu ),( Ming-lun Yeh ),( Chi-yi Chen ),( Pin-nan Cheng ),( Ming-jong Bair ),( Jyh-jou Chen ),( Ching-chu Lo ),( Chi-ming Tai ),( Ching-yang Tsai ),( Kuo-chih Tseng ),( Chien-hung Chen ),( C 대한간학회 2020 춘·추계 학술대회 (KASL) Vol.2020 No.1

Aims: Insufficient data regarding the treatment strategy for partial response to nucleot(s)ide analogue (NUC) raised the aim of investigating tenofovir alafenamide (TAF) switching for chronic hepatitis B (CHB) patients with advanced fibrosis and partial response to other NUCs. Methods: CHB patients with advanced fibrosis (stage 3 or 4) and under NUC (except TAF) therapy with detectable hepatitis B virus (HBV) DNA for >52 weeks are enrolled to TAF 25 mg/day for 96 weeks. The objectives are viral suppression, alanine aminotransferase (ALT) normalization and safety. Results: From Feb. 2019, 34 patients, including 21 (61.8%) with entecavir, 10 (29.4%) TDF and 3 (8.8%) lamivudine or adefovir, were enrolled (15 [44.1%] male, median 53 years). The fibroscan demonstrated a mean of 10.5 kPa (7 [20.6%] cirrhotic). Sixteen (47.1%) patients were HBV e antigen positive, seven (20.6%) had YMDD mutation. The median HBV DNA level declined from 68.5 IU/mL at enrollment to 27.0 IU/mL at 4^th week, and undetectable at 12^th, 24^th, 36^th week, respectively, after TAF switching, with undetectable HBV DNA in 14/34 (41.2%), 17/33 (51.5%), 15/25 (60.0%), and 9/15 (60.0%) patients and rate of ALT normalization (≤40 U/L) of 85.3%, 85.3%, 84.8%, 92.0%, and 80.0%, respectively, after TAF switching. (figure 1) Two patients experienced transient virological breakthrough and another one developed at the final time follow up. Serum creatinine and eGFR levels were stable after TAF switching (figure 1). Two patients early terminated including one at 12^th week due to personal reason, and another one accidently died at 20^th week due to acute heart attack. Others suffered only mild degrees of adverse events which were considered unrelated to treatment. Conclusions: The preliminary results demonstrated the TAF switching is effective and safe in viral suppression for CHB patients with advanced fibrosis and partial virologic responses to other NUCs.

Ultraviolet-assisted synthesis of encapsulating adhesives and their application for lifetime improvement of organic light emitting diodes

Chen-Ming Chen,Ming-Hua Chung,Tsung-Eong Hsieh,Bohr-Ran Huang,Huai-En Hsieh,Fuh-Shyang Juang,Yu-Sheng Tsai,Mark O. Liu,Jen-Lien Lin 한국물리학회 2009 Current Applied Physics Vol.9 No.4

The lifetimes of organic light emitting diodes (OLEDs) have been successfully enhanced with the modulation of LiF thickness and the utilization of encapsulating adhesives, which have been successfully and quickly synthesized with UV irradiation. Experimental results demonstrate that LiF and lab-made encapsulating adhesives can block the invasion of moisture as well as oxygen in the atmosphere into the OLEDs so that the lifetimes of devices with their encapsulation are 18-folds longer than those without encapsulation. The lifetimes of organic light emitting diodes (OLEDs) have been successfully enhanced with the modulation of LiF thickness and the utilization of encapsulating adhesives, which have been successfully and quickly synthesized with UV irradiation. Experimental results demonstrate that LiF and lab-made encapsulating adhesives can block the invasion of moisture as well as oxygen in the atmosphere into the OLEDs so that the lifetimes of devices with their encapsulation are 18-folds longer than those without encapsulation.

Optimal Lot-sizing and Pricing with Markdown for a Newsvendor Problem

Chen, Jen-Ming,Chen, Yi-Shen,Chien, Mei-Chen Korean Institute of Industrial Engineers 2008 Industrial Engineeering & Management Systems Vol.7 No.3

This paper deals with the joint decisions on pricing and ordering for a monopolistic retailer who sells perishable goods with a fixed lifetime or demand period. The newsvendor-typed problem is formulated as a two-period inventory system where the first period represents the inventory of fresh or new-arrival items and the second period represents the inventory of items that are older but still usable. Demand may be for either fresh items or for somewhat older items that exhibit physical decay or deterioration. The retailer is allowed to adjust the selling price of the deteriorated items in the second period, which stimulates demand and reduces excess season-end or stale inventory. This paper develops a stochastic dynamic programming model that solves the problem of preseason decisions on ordering-pricing and a within-season decision on markdown pricing. We also develop a fixed-price model as a benchmark against the dual-price dynamic model. To illustrate the effect of the dual-price policy on expected profit, we conduct a comparative study between the two models. Extension to a generalized multi-period model is also discussed.

Optimizing Production of Two Potential Probiotic Lactobacilli Strains Isolated from Piglet Feces as Feed Additives for Weaned Piglets

Ming-Lun Chiang,Hsi-Chia Chen,Kun-Nan Chen,Yu-Chun Lin,Ya-Ting Lin,Ming-Ju Chen 아세아·태평양축산학회 2015 Animal Bioscience Vol.28 No.8

Two probiotic strains, Lactobacillus johnsonii x-1d-2 and Lactobacillus mucosae x-4w-1, originally isolated from piglet feces, have been demonstrated to possess antimicrobial activities, antibiotic resistances and interleukin-6 induction ability in RAW 267.4 macrophages in our previous study. These characteristics make L. johnsonii x-1d-2 and L. mucosae x-4w-1 good candidates for application in feed probiotics. In this study, soybeal meal, molasses and sodium acetate were selected to optimize the growth medium for cultivation of L. johnsonii x-1d-2 and L. mucosae x-4w-1. These two strains were then freeze-dried and mixed into the basal diet to feed the weaned piglets. The effects of L. johnsonii x-1d-2 and L. mucosae x-4w-1 on the growth performance and fecal microflora of weaned piglets were investigated. The results showed that the bacterial numbers of L. johnsonii x-1d-2 and L. mucosae x-4w-1 reached a maximum of 8.90 and 9.30 log CFU/mL, respectively, when growing in optimal medium consisting of 5.5% (wt/vol) soybean meal, 1.0% (wt/vol) molasses and 1.0% (wt/vol) sodium acetate. The medium cost was 96% lower than the commercial de Man, Rogosa and Sharpe medium. In a further feeding study, the weaned piglets fed basal diet supplemented with freeze-dried probiotic cultures exhibited higher (p<0.05) body weight gain, feed intake, and gain/feed ratio than weaned piglets fed basal diet. Probiotic feeding also increased the numbers of lactobacilli and decreased the numbers of E. coli in the feces of weaned piglets. This study demonstrates that L. johnsonii x-1d-2 and L. mucosae x-4w-1 have high potential to be used as feed additives in the pig industry.