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( Pui-tak Lee ) 부경대학교 글로벌지역학연구소 2017 Journal of Global and Area Studies(JGA) Vol.1 No.2
The primary concern of this paper is to examine the business networks of Cantonese merchants in the period of 1850s-1910s, based on what the merchants recorded by themselves in the family correspondences and the wills (the probate jurisdiction, the Supreme Court of Hong Kong, Hong Kong Record Series 144). These materials are informative of the testators’ life stories such as origins of emigration, family details, occupation, involvement of businesses, and location of residence. From these materials emerges the networking pattern that made the Cantonese merchants successful at home and overseas. To examine the hidden aspect of cross border networks of Cantonese, this paper will focus on the following issues: How did the Cantonese successfully extend and maintain their networks of business from Guangdong to Hong Kong, South China, Southeast Asia, Australia and North America? To what extent were the family networks interwoven with the business networks and were they effective in helping production, circulation, and consumption? Above all, did the Cantonese overseas network tell us something unique about Chinese practice of capitalism?
Cognition, Metacognition, and Metacognitive Theory : A Critical Analysis
Pui-wan Cheng 대한사고개발학회 1999 The International Journal of Creativity & Problem Vol.9 No.1
This paper offers a critical analysis of the validity and utility of metacognition as an independent construct for psychological studies. To examine the construct validity of metacognition, the relationship between cognition and metacognition is first analyzed and the conceptual issues involved in the study of metacognition are then examined. To demonstrate the construct utility of metacognition, theoretical perspectives from different areas of psychological studies with a metacognitive focus are presented. It is concluded that metacognition, with its emphasis on the superordinate role of awareness and control in directing cognitive activities and its linkage to motivational correlates, is a valid and useful concept that generates important insights into the conditions and mechanisms of human performance.
Endovascular Management of Hepatic Artery Pseudoaneurysms: A Case Series
Pui Lam Cheung,Yat Sing Lee,Chong Boon Tan,Hin Yue Lau,Chi Wai Siu,Chik Xing Chan,Wai Tat Chan,Cheuk Him Ho 대한혈관외과학회 2023 Vascular Specialist International Vol.39 No.1
Although rare, hepatic artery aneurysms are associated with a high morbidity and mortality, necessitating a prompt diagnosis. A significant proportion of hepatic artery aneurysms are pseudoaneurysms, and the major risk factors of which have already been identified in previous literatures. Presentation can be variable, but diagnosis almost relies entirely on computed tomography and digital subtraction angiography. The endovascular approach has progressively become the preferred option due to its better performance when compared to the traditional surgical approach. However, formulation of an endovascular treatment plan for these lesions remains difficult as multiple factors should be considered to identify the best endovascular treatment modality. Five cases of pseudoaneurysm due to recent Whipple operation, hepatobiliary infections, and underlying malignancy are presented in this article to illustrate the effectiveness and complexity of endovascular treatment in this disease entity.
Jason Pui Yin Cheung,Prudence Wing Hang Cheung,Chee Kidd Chiu,Chris Yin Wei Chan,Mun Keong Kwan 대한척추외과학회 2019 Asian Spine Journal Vol.13 No.1
Study Design: Surgeon survey. Purpose: To study the various surgical practices of different surgeons in the Asia–Pacific region. Overview of Literature: Given the diversity among Asia–Pacific surgeons, there is no clear consensus on the preferred management strategies for cervical myelopathy. In particular, the role of prophylactic decompression for silent cervical spinal stenosis is under constant debate and should be addressed. Methods: Surgeons from the Asia–Pacific Spine Society participated in an online questionnaire comprising 50 questions. Data on clinical diagnosis, investigations and outcome measures, approach to asymptomatic and silent cervical spinal stenosis, guidelines for surgical approach, and postoperative immobilization were recorded. All parameters were analyzed by the Mantel–Haenszel test. Results: A total of 79 surgeons from 16 countries participated. Most surgeons used gait disturbance (60.5%) and dyskinetic hand movement (46.1%) for diagnosis. Up to 5.2% of surgeons would operate on asymptomatic spinal stenosis, and 18.2% would operate on silent spinal stenosis. Among those who would not operate, most (57.1%) advised patients on avoidance behavior and up to 9.5% prescribed neck collars. For ossification of the posterior longitudinal ligament (OPLL), anterior removal was most commonly performed for one-level disease (p <0.001), whereas laminoplasty was most commonly performed for two- to four-level disease (p =0.036). More surgeons considered laminectomy and fusion for multilevel OPLL. Most surgeons generally preferred to use a rigid neck collar for 6 weeks postoperatively (p <0.001). Conclusions: The pooled recommendations include prophylactic or early decompression surgery for patients with silent cervical spinal stenosis, particularly OPLL. Anterior decompression is primarily suggested for one- or two-level disease, whereas laminoplasty is preferred for multilevel disease.
Jason Pui Yin Cheung,Prudence Wing Hang Cheung,Dino Samartzis,Keith Dip-Kei Luk 대한척추외과학회 2018 Asian Spine Journal Vol.12 No.2
Study Design: Prospective study. Purpose: To determine the risk of clinically significant curve progression in adolescent idiopathic scoliosis (AIS) based on the initial Cobb angle and to test the utility of the distal radius and ulna (DRU) classification in predicting these outcomes. Overview of Literature: Determining the remaining growth potential in AIS patients is necessary for predicting prognosis and initiating treatment. Limiting the maturity Cobb angle to <40° and <50° reduces the risk of adulthood progression and need for surgery, respectively. The risk of curve progression is the greatest with skeletally immature patients and thus warrants close monitoring or early intervention. Many parameters exist for measuring the skeletal maturity status in AIS patients, but the DRU classification has been shown to be superior in predicting peak growth and growth cessation. However, its predictive capabilities for curve progression are unknown. Methods: Totally, 513 AIS patients who presented with Risser 0–3 were followed until either skeletal maturity or the need for surgery, with a minimum 2-year follow-up period. Outcomes of 40° and 50° were used for probability analysis based on the cut-offs of adulthood progression risk and surgical threshold, respectively. Results: At the R6/U5 grade, most curves (probability of ≥48.1%–55.5%) beyond a Cobb angle of 25° progressed to the 40° threshold. For curves of ≥35°, there was a high risk of unfavorable outcomes, regardless of skeletal maturity. Most patients with the R9 grade did not progress, regardless of the initial curve magnitude (probability of 0% to reach the 50° threshold for an initial Cobb angle of ≥35°). Conclusions: This large-scale study illustrates the utility of the DRU classification for predicting curve progression and how it may effectively guide the timing of surgery. Bracing may be indicated for skeletally immature patients at an initial Cobb angle of 25°, and those with a scoliosis ≥35° are at an increased risk of an unfavorable outcome, despite being near skeletal maturity.