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Meng-Luen Lee,Ming-Yuh Chang,Tung-Ming Chang,Rei-Cheng Yang,Ming-Che Chang,Albert D. Yang 대한의학회 2018 Journal of Korean medical science Vol.33 No.10
Concurrent involvement of bilateral renal and cerebral arteries, usually incurred as stenosis is rare in childhood-onset Takayasu arteritis (c-TA). We report the case of a 14-year-old girl, with c-TA, presenting with transient ischemic attack after endovascular revascularization for renal artery stenosis and cerebrovascular stroke after surgical revascularization for cerebral artery stenosis associated with childhood-onset moyamoya syndrome. We deem th decrease of blood pressure by endovascular revascularization and improvement of cerebral perfusion by surgical revascularization may have jeopardized the cerebral deep watershed zone to cerebral ischemia followed by cerebral hyperperfusion syndrome and caused transient ischemic attack and cerebrovascular stroke in our patient. Revascularization could be a double-edge sword for c-TA patients presenting with concomitant renal artery stenosis and cerebral artery stenosis, and should be performed with caution. Quantitative analysis of cerebral blood flow by brain magnetic resonance imaging and angiography should be performed within 48 hours after surgical revascularization in c-TA.
Che-Chao Chiang,Min-chi Chang,Po-Tsang Chen,Fu-Ming Chiang 세계문화관광학회 2010 Conference Proceedings Vol.11 No.0
This study examines the information searching of business travelers and their behavior based on the cultural differences. Despite growing academic interest in business travel i n recent years, there has been little investigation of the information search behaviors of business travelers in a cross-culture context. The above themes are rational assumed that information search behaviour are necessary to understand. To address the identified gap s in the literature, the proposed relationships are examined and presented through using chi-square method with a survey sample. The research sample included Japanese, English and Chinese business travellers. A self-administrated questionnaire was distributed to 211 business travelers attending international conventions in Taipei. The research findings reveal that information preferences of business travelers are significantly differed from the three recognized groups in the case of Taiwan. Some significant differences in information search behaviors were recognized amongst the three recognized respondent groups. Marketing implications were also proposed and presented.
Split-Capacitor Self-Balancing of Single-Phase Half-Bridge Inverters
Che-Wei Chang,Terng-Wei Tsai,Yaow-Ming Chen 전력전자학회 2019 ICPE(ISPE)논문집 Vol.2019 No.5
This paper uncovers the mechanism of the unbalanced split capacitor voltage caused by the deviation of the sensing signal. For the single-phase half-bridge (SPHB) inverter, the deviation of the sensing signal will lead to an offset on the output current and further causes the deviation of split capacitor voltage. However, this unbalance capacitor voltage will help to compensate the output current offset. Consequently, the capacitor voltages will drift to a certain stable voltage level, which is commonly called the selfbalancing effect. This paper presents the precise mathematical equations by analyzing the self-balancing mechanism and accurately predict the value of capacitor voltage variations. Computer simulations and hardware experimental results of a 1kVA SPHB inverter are shown to verify the accuracy of the mathematical equations.
The End User Computing Strategy of Using Excel VBA in Promoting Nursing Informatics in Taiwan
Chang, Polun,Hsu, Chiao-Ling,Hou, I-Ching,Tu, Ming Hsiang,Liu, Che-Wei The Research Institute of Nursing Science Seoul Na 2008 간호학의 지평 Vol.5 No.1
The nursing informatics has been booming in Taiwan since 2003 when we started to use the end user computing strategy to promote it. We used Excel 2003, which was well known and used by our clinical nurses, as well as the embedded VBA to teach them how simple information applications could and should be built to meet their information management needs in order to support their professional responsibility. Many cost-effective projects were successfully done and the importance and potentials of nursing informatics started to be noticed. Our training strategy and materials are introduced in this paper.
Jia-Ming Chen,Wan-Li Chiang,Bin-Chuan Ji,Ruei-Jhe Jhang,Pei-Hsin Chen,Ya-Lun Li,Che-Ju Chang,Sung-Yen Huang,Tsung-Chieh Lee,Chia-Yun Chen,Ching-Hsiung Lin,Sheng-Hao Lin 한국한의학연구원 2023 Integrative Medicine Research Vol.12 No.4
Background: In intensive care units, mechanical ventilation is an important therapy to help patients with dysp- nea. However, long-term ventilator dependence would consume huge medical resources and increase the risk of morbidity and mortality. The aim of the study was to examine the efficacy of the acupuncture combined with western medical care on ventilator parameters in ventilator-dependent patients. Methods: In this clinical trial, 80 ventilator-dependent patients aged 20 to 80 years old were randomly assigned to acupuncture group and control group in the respiratory care center (RCC) of Changhua Christian Hospital. Besides regular medical care and therapy, participants in the acupuncture group received acupuncture therapy at the same 17 acu-points for 20 minutes once a day, a total of 12 sessions. The ventilator parameters were recorded to evaluate the respiratory efficiency for all participants. The primary outcome was rapid shallow breathing index (RSBI), and secondary outcomes were respiratory rate (RR), tidal volume (TV) and ventilation per minute (MV). Results: Though there was no significant difference in the parameter between the acupuncture group and the control group, we found the trend of decreasing RSBI in the acupuncture group. In subgroup analyses, the mean of RSBI significantly decreased 16.02 (with the SD in 60.84) in acupuncture group, while it increased 17.84 (with the SD in 39.38) in control group (p = 0.036) after 12 sessions. Conclusion: Acupuncture treatment can improve breathing ability of patients with respirator dependence in respiratory care center.
Wei-Che Chang,Ming-Yang Cheng,Hong-Jin Tsa 제어로봇시스템학회 2013 제어로봇시스템학회 국제학술대회 논문집 Vol.2013 No.10
Mechanical cutting is very important in many industrial applications. Since mechanical cutting often involves contour following, generally, prior trajectory planning is inevitable. However, in some applications the geometric model of the object for cutting is not available. One possible approach to circumventing this difficulty is to employ a visual servoing approach. As a result, in this paper, an eye-to-hand camera mounted on the ceiling is used to obtain the shape information of the object. Moreover, PH splines are designed to represent the obtained object shape. Based on the obtained PH splines, an interpolator is developed to generate the desired feature command for the Image-Based Visual Servoing (IBVS) structure. Another eye-to-hand camera is placed in a position that can have a full view of the object for cutting so as to provide vision feedback for the IBVS structure. Finally, contouring following experiments of several objects with arbitrary shapes have been conducted to validate the effectiveness of the proposed approach.
Chung-Che Chou,Gee‑Jin Yu,Kung‑Juin Wang,Wei‑Tze Chang,Chiun‑Lin Wu,Charlene Chin‑Jie Zhao,Chun‑Yao Yang,Ming‑Ti Chou 한국정밀공학회 2023 International Journal of Precision Engineering and Vol.24 No.9
This paper presents a study to investigate the feasibility of using robotic welding technologies to weld the continuity plate and the column flange plate during manufacturing steel built-up box columns in buildings. Specimens designed to emulate the key components in the steel beam-to-column moment connections for Special moment frame were fabricated and welded using a proposed automated procedure that performs multi-layer, multi-pass welding for thick steel plates. Effects of controlling parameters on robotic welding results that includes the manner of bead stacking, wire feed speed, travel speed, working angle, arc voltage, the path of the welding pass, and the methods to start and finish welding passes were investigated. The quality of the welded products was assessed by visual inspection and ultrasonic testing (UT). Further mechanical tests including tensile tests, bending tests, and cyclic loading tests were carried out on selected welded products that passed the UT examination. The test results indicated that the robotic welds showed no visible damage or cracks, met requirements specified in the AWS specification, and exhibited satisfactory strength and ductility.
( Chih Chun Hsieh ),( Tao Chih Chang ),( Dong Yih Lin ),( Ming Che Chen ),( Wei Te Wu ) 대한금속재료학회 ( 구 대한금속학회 ) 2007 METALS AND MATERIALS International Vol.13 No.5
The purpose of this study is to investigate the precipitation characteristics of σ phase in the fusion zone of stainless steel welds at various welding passes during a tungsten arc welding (GTAW) process. The morphology, quantity, and chemical composition of the δ-ferrite and σ phase were analyzed using optical microscopy (OM), a ferritscope (FS), a X-ray diffractometer (XRD), scanning electron microscopy (SEM), an electron probe micro-analyzer (EPMA), and a wavelength dispersive spectrometer (WDS), respectively. Massive δ-ferrite was observed in the fusion zone of the first pass welds during welding of dissimilar stainless steels. The σ phase precipitated at the inner δ-ferrite particles and decreased δ-ferrite content during the third pass welding. The σ and δ phases can be stabilized by Si element, which promoted the phase transformation of δ→σ + γ2 in the fusion zone of the third pass welds. It was found that the σ phase was a Fe-Cr-Si intermetallic compound found in the fusion zone of the third pass welds during multi-pass welding.