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Chang-Lun Liao,Kuan-Hong Lin,Shun-Tian Lin 한양대학교 세라믹연구소 2008 Journal of Ceramic Processing Research Vol.9 No.6
The microstructures and dielectric properties of Ba0.88(Nd1.40Bi0.42La0.30)Ti4O12/ alkali-borosilicate glass composites were investigated in this study, with the volume percentage of the glass phase in the composite being either 50, 55, or 60 vol.%. Sintered density measurements indicated that the density increased with an increase in the sintering temperature for the composites with 50 and 55 vol.% glass additions, but, at a sintering temperature higher than 800 oC, the density decreased for the composite with a 60 vol.% glass addition. XRD patterns revealed that the peak of the highest intensity in the B(NBL)T crystal belongs to the (401) crystal plane, while that in the B(NBL)T/glass composites to the (320) crystal plane. Along with the change in crystalline preferred orientation, the lattice constants of the crystal also changed. SEM micrographs indicated that the B(NBL)T phase developed into columnar grains at sintering temperatures higher than 1260 oC. Moreover, when glass was added, the grain morphology changed, especially at sintering temperatures higher than 850 oC. When sintered at 950 oC for 2 hours, the composite with 55 vol.% glass yielded the highest dielectric constant (εr= 23.2), the lowest dielectric loss (tanδ = 4.1 × 10-3), and a high Q×f value (Q × f = 1,620 GHz, Q = 1/tanδ, f = 6.67 GHz). The microstructures and dielectric properties of Ba0.88(Nd1.40Bi0.42La0.30)Ti4O12/ alkali-borosilicate glass composites were investigated in this study, with the volume percentage of the glass phase in the composite being either 50, 55, or 60 vol.%. Sintered density measurements indicated that the density increased with an increase in the sintering temperature for the composites with 50 and 55 vol.% glass additions, but, at a sintering temperature higher than 800 oC, the density decreased for the composite with a 60 vol.% glass addition. XRD patterns revealed that the peak of the highest intensity in the B(NBL)T crystal belongs to the (401) crystal plane, while that in the B(NBL)T/glass composites to the (320) crystal plane. Along with the change in crystalline preferred orientation, the lattice constants of the crystal also changed. SEM micrographs indicated that the B(NBL)T phase developed into columnar grains at sintering temperatures higher than 1260 oC. Moreover, when glass was added, the grain morphology changed, especially at sintering temperatures higher than 850 oC. When sintered at 950 oC for 2 hours, the composite with 55 vol.% glass yielded the highest dielectric constant (εr= 23.2), the lowest dielectric loss (tanδ = 4.1 × 10-3), and a high Q×f value (Q × f = 1,620 GHz, Q = 1/tanδ, f = 6.67 GHz).
Jin, Chang-Feng,Li, Bo,Lin, Shun-Mei,Yadav, Raj-Kumar,Kim, Hyung-Ryong,Chae, Han-Jung Hindawi Publishing Corporation 2013 International Journal of endocrinology Vol.2013 No.-
<P><I>Eucommia ulmoides</I> Oliv. (EU) has been used for treatment of liver diseases. The protective effects of <I>Eucommia Ulmoides</I> Oliv. cortex extracts (EUCE) on the carbon tetrachloride- (CCl<SUB>4</SUB>-) induced hepatic lipid accumulation were examined in this study. Rats were orally treated with EUCE in different doses prior to an intraperitoneal injection of 1 mg/kg CCl<SUB>4</SUB>. Acute injection of CCl<SUB>4</SUB> decreased plasma triglyceride but increased hepatic triglyceride and cholesterol as compared to control rats. On the other hand, the pretreatment with EUCE diminished these effects at a dose-dependent manner. CCl<SUB>4</SUB> treatment decreased glutathione (GSH) and increased malondialdehyde (MDA) accompanied by activated P450 2E1. The pretreatment with EUCE significantly improved these deleterious effects of CCl<SUB>4</SUB>. CCl<SUB>4</SUB> treatment increased P450 2E1 activation and ApoB accumulation. Pretreatment with EUCE reversed these effects. ER stress response was significantly increased by CCl<SUB>4</SUB>, which was inhibited by EUCE. One of the possible ER stress regulatory mechanisms, lysosomal activity, was examined. CCl<SUB>4</SUB> reduced lysosomal enzymes that were reversed with the EUCE. The results indicate that oral pretreatment with EUCE may protect liver against CCl<SUB>4</SUB>-induced hepatic lipid accumulation. ER stress and its related ROS regulation are suggested as a possible mechanism in the antidyslipidemic effect of EUCE.</P>
( Chien Chang Liao ),( Chao Shun Lin ),( Ta Liang Chen ) 대한내과학회 2014 대한내과학회 추계학술대회 Vol.2014 No.1
Background: Limited information was available regarding the postoperative adverse outcomes among surgical patients with asthma in population-based study. The purpose of this study is to investigate postoperative major complications and mortality in surgical patients with asthma. Methods: Using reimbursement claims from the Taiwan National Health Insurance Research Database, we identifi ed 24,109 surgical patients with preoperative asthma and 24,109 non-asthma patients undergoing major surgeries using matching procedure with propensity score by sociodemographics, coexisting medical conditions and surgical characteristics. Adjusted odds ratios (ORs) and 95% confi dence intervals (CIs) of 30-day postoperative complications and mortality associated with asthma were analyzed in the multivariate logistic regressions. Results: Predisposing asthma increased postoperative pneumonia (OR, 1.48; 95% CI, 1.34-1.64), septicemia (OR, 1.11; 95% CI, 1.02-1.21), and urinary tract infection (OR, 1.17; 95% CI, 1.09-1.26). Preoperative emergency care for asthma was signifi cantly associated with postoperative 30-day in-hospital mortality, with an OR of 1.84 (95% CI, 1.11-3.04). Preoperative emergency service, hospitalizations, intensive care unit (ICU) admissions, and systemic use of corticosteroids for asthma were also associated with higher postoperative complication rates for asthmatic patients. Admission to intensive care unit for caring asthma preoperatively was associated with postoperative pneumonia (OR, 1.64; 95% CI, 1.37-1.97), septicemia (OR, 1.75; 95% CI, 1.50-2.05), urinary tract infection (OR, 1.85; 95% CI, 1.60-2.15) and mortality (OR, 1.88; 95% CI, 1.35- 2.62). Conclusions: Postoperative complications and 30-day mortality rates were significantly increased in asthmatic patients undergoing major surgeries. We suggest special attention and urgency revising the protocol of perioperative care for this specifi c population.
Controlling chaos for automotive disc brake squeal suppression
Bao-Chau Lin,Shun-Chang Chang,Jui-Feng Hu,Yeou-Feng Lue 대한기계학회 2015 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.29 No.6
Disc brake squeal is a manifestation of friction-induced, self-excited instability in disc brake systems. This paper investigates the nonsmoothbifurcations and chaotic dynamics associated with braking systems. In most situations, decreasing squealing is a means to suppresschaotic disturbances, which would otherwise compromise the comfort of passengers. The proposed method begins with an estimationof the largest Lyapunov exponent using synchronization to differentiate between periodic and chaotic motions. We then observecomplex nonlinear behaviors associated with a range of parameters and plot them in a bifurcation diagram. Rich dynamics of disc brakesystems are examined using the bifurcation diagram, phase portraits, Poincaré maps, frequency spectra, and Lyapunov exponents. Finally,state feedback control is used to overcome chaotic behaviors and prevent squealing from occurring during braking. Finally, the effectivenessof the proposed control method is examined through numerical simulations.
Wei-Che Lin,Wen-Chieh Chen,Pei-Wen Wang,Yi-Chia Chan,Yen-Hsiang Chang,Harn-Shen Chen,Szu-Tah Chen,Wei-Chih Chen,Kai-Lun Cheng,Shun-Yu Chi,Pi-Ling Chiang,Chen-Kai Chou,Feng-Fu Chou,Shun-Chen Huang,Feng 대한초음파의학회 2023 ULTRASONOGRAPHY Vol.42 No.3
Radiofrequency ablation (RFA) is a minimally invasive management strategy that has been widely applied for benign and recurrent malignant thyroid lesions as an alternative to surgery in Taiwan. Members of academic societies for specialists in interventional radiology, endocrinology, and endocrine surgery collaborated to develop the first consensus regarding thyroid RFA in Taiwan. The modified Delphi method was used to reach a consensus. Based on a comprehensive review of recent and valuable literature and expert opinions, the recommendations included indications, pre-procedural evaluations, procedural techniques, post-procedural monitoring, efficacy, and safety, providing a comprehensive review of the application of RFA. The consensus effectively consolidates advice regarding thyroid RFA in clinical practice for local experts.
Jian-Shian Lin,Ming-Hua Chung,Chen-Ming Chen,Fuh-Shyang Juang,Yu-Sheng Tsai,Shu-Wei Chang,Shun-Hsi Wang,Teh-Chao Liao,Lung-Chang Liu 한국물리학회 2010 Current Applied Physics Vol.10 No.5
UV-curable organic/inorganic hybrid composites with gas barrier and heat-dissipating capability have been successfully fast synthesized with microwave irradiation and utilized for the encapsulation of top-emitting organic light-emitting diodes (TEOLEDs). Experimental results manifest that lab-made organic/inorganic hybrid composites can effectively not only obstruct the invasion of moisture as well as oxygen in the atmosphere into the device but also lower the temperature of device. Therefore, the lifetimes of TEOLEDs with their encapsulation are 2.2 folds longer than those without encapsulation.
Fabrication of Gas-permeable Die Materials Having Orthogonally Arrayed Pore Channels
Chan Tien-Yin,Lin Shun-Tian,Chang Hua-Jun,Chen Chia-Liang 한국분말야금학회 2006 한국분말야금학회 학술대회논문집 Vol.2006 No.1
Gas-permeable metal die materials are developed using tool steel powder, packed in a mold having the insertion of orthogonally arrayed polymer wires. Linear gas-permeable channels in orthogonal array are thus developed by the burning out of the polymer wires, which yield a microstructure with wear resistance value and air permeability much larger than those of the conventional gas-permeable die material.
Thermometry for Dirac Fermions in Graphene
Fan-Hung Liu,Chang-Shun Hsu,Shun-Tsung Lo,Chiashain Chuang,Lung-I Huang,Tak-Pong Woo,Chi-Te Liang,Y. Fukuyama,Y. Yang,R. E. Elmquist,Pengjie Wang,Xi Lin 한국물리학회 2015 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.66 No.1
We use both the zero-magnetic-field resistivity and the phase coherence time determined by weaklocalization as independent thermometers for Dirac fermions (DF) in multilayer graphene. In thehigh current (I) region, there exists a simple power law TDF / I0.5, where TDF is the effective Diracfermion temperature for epitaxial graphene on SiC. In contrast, TDF / I1 in exfoliated multilayergraphene. We discuss possible reasons for the different power laws observed in these multilayergraphene systems. Our experimental results on DF-phonon scattering may find applications ingraphene-based nanoelectronics.