1,754 research outputs found
The Utility of a Novel Proximal Femur Maturity Index for Staging Skeletal Growth in Patients with Idiopathic Scoliosis
No full textInvestigation performed at the Department of Orthopaedics and Traumatology, The University of Hong Kong, Pokfulam, Hong Kong SAR.
Background: For growing patients, it is ideal to have a growth plate visible in routine radiographs for skeletal maturity assessment without additional radiation. The proximal femoral epiphyseal ossification is in proximity to the spine; however, whether it can be used for assessing a patient’s growth status remains unknown.
Methods: Two hundred and twenty sets of radiographs of the spine and the left hand and wrist of patients with idiopathic scoliosis were assessed for skeletal maturity and reliability testing. Risser staging, Sanders staging (SS), distal radius and ulna (DRU) classification, the proximal humeral ossification system (PHOS), and the novel proximal femur maturity index (PFMI) were used. The PFMI was newly developed on the basis of the radiographic appearances of the femoral head, greater trochanter, and triradiate cartilage. It consists of 7 grades (0 to 6) associated with increasing skeletal maturity.
The PFMI was evaluated through its relationship with pubertal growth (i.e., the rate of changes of standing and sitting body height [BH] and arm span [AS]) and with established skeletal maturity indices. Longitudinal growth data and 780 corresponding
spine radiographs were assessed to detect peak growth using receiver operating characteristic (ROC) curve analysis.
Results: The PFMI was found to be correlated with chroncological age (tb = 0.522), growth rates based on standing BH (tb = 20.303), and AS (tb = 20.266) (p < 0.001 for all). The largest growth rate occurred at PFMI grade 3, with mean standing BH growth rates (and standard deviations) of 0.79 ± 0.44 cm/month for girls and 1.06 ± 0.67 cm/mo for boys.
Growth rates of 0.12 ± 0.23 cm/mo (girls) and 0 ± 0 cm/mo (boys) occurred at PFMI grade 6, indicating growth cessation. Strong correlations were found between PFMI gradings and Risser staging (tb = 0.743 and 0.774 for girls and boys), Sanders staging (tb = 0.722 and 0.736, respectively), and radius (tb = 0.792 and 0.820) and ulnar gradings (tb = 0.777
and 0.821), and moderate correlations were found with PHOS stages (tb = 0.613 and 0.675) (p < 0.001 for all). PFMI gradings corresponded to as young as SS1, R4, U1, and PHOS stage 1. Fair to excellent interrater and intrarater reliabilities were observed. PFMI grade 3 was most prevalent and predictive for peak growth based on ROC results.
Conclusions: The PFMI demonstrated clear pubertal growth phases with satisfactory reliability. Grade 3 indicates peak growth and grade 6 indicates growth cessation.
Clinical Relevance: The use of PFMI can benefit patients by avoiding additional radiation in skeletal maturity assessment and can impact current clinical protocol of patient visits. PFMI gradings had strong correlations with SS, DRU gradings, and Risser staging, and they cross-referenced to their established grades at peak growth and growth cessation. PFMI may aid in clinical decision making
Some Weighted Hardy-type Inequalities of Vector-Valued Functions
No full textBy adopting the C-technique of Cheung and Pečrić, we establish some interesting weighted Hardy-type inequalities of vector-valued functions. These generalize and improve some existing results of Cheung, Cheung-Hanjš-Pēcarić, Hanjš-Love-Pečarić, Levinson, and Pachpatte. [ABSTRACT FROM AUTHOR
Steven Cheung and Coasian Economics: A Personal Reflection
No full textAbstractIt is an intimidating challenge, both emotionally and intellectually, to write something of enough worth to celebrate the 80th birthday of Steven Cheung and to honor the memory of Professor Ronald Coase. Both are serious scholars. Coase was a devoted scholar; nothing interested him other than academics. Steve has much wider interests, ranging from photography, calligraphy, to art collection. Nonetheless, both are adamant reformers and determined to change economics. They have set an intimidating standard.</jats:p
Steve Cheung as Teacher
No full textAbstractIt was 1968 and I was studying economics with Armen Alchian at UCLA. It was my first year as a graduate student and Armen was teaching the Microeconomics course to all the first year grad students. While I had an undergraduate degree in economics, Armen was the first professor I had that made it fun and fascinating. To him, economics was the science of human behavior and not a bunch of mathematical mechanisms called a market. In the middle of this year, my military draft number was up and I was called to join the U.S. Army. However, my draft board gave me the choice of Army or college teaching. I asked Armen for some help and he wrote letters for me to various colleges, including California State College in San Luis Obispo. With only my masters degree, I was offered the job at Cal Poly and taught there for 3 years, until I was too old to be drafted into the military. I called Armen and told him I wanted to return to graduate school but I did not want to live again in Los Angeles. Where should I go? Without any hesitation, Armen said, “Go to the University of Washington and follow Steve Cheung wherever he goes. Take every course he teaches and listen carefully to everything he says.”</jats:p
Feasibility study on the establishment of a steel fabrication factory in southern part of China.
No full textby Cheung Him-wah, Tam Sui-leung.Thesis (M.B.A.)--Chinese University of Hong Kong, 1991.Bibliography: leaves 62-63.SUMMARY --- p.iiCONTENTS --- p.iiiCHAPTERChapter 1 --- INTRODUCTION --- p.1Chapter 1.1 --- Economic Situation of Hong Kong --- p.1Chapter 1.2 --- Economic Situation of China --- p.2Chapter 1.3 --- The Feasibility Study --- p.3Chapter 1.4 --- Supporting Arguments --- p.4Chapter 2 --- METHODOLOGY --- p.7Chapter 2.1 --- Market Demand Analysis --- p.7Chapter 2.2 --- Location Selection Analysis 一 Part I --- p.7Chapter 2.3 --- Location Selection Analysis 一 Part II --- p.8Chapter 2.4 --- Form of Investment Analysis --- p.8Chapter 2.5 --- Cash Flow Analysis --- p.9Chapter 2.6 --- Flow Chart --- p.9Chapter 3 --- MARKET DEMAND ANALYSIS --- p.10Chapter 3.1 --- Types of Product --- p.10Chapter 3.2 --- Forecasting Methodologies --- p.11Chapter 3.3 --- Demand Forecasting --- p.12Chapter 4 --- PRELIMINARY SELECTION OF LOCATION --- p.18Chapter 4.1 --- Background --- p.18Chapter 4.2 --- Shenzhen Special Economic Zone --- p.19Chapter 4.3 --- Huichow --- p.21Chapter 4.4 --- Shantou Special Economic Zone --- p.23Chapter 4.5 --- Guangzhou 一 Guangzhou Economic & Technology Developing Zone --- p.24Chapter 4.6 --- Hainan Special Economic Zone --- p.26Chapter 4.7 --- Zhuhai - The West Economic Developing District --- p.28Chapter 4.8 --- First-round Conclusion --- p.30Chapter 5 --- FORMS OF INVESTMENT --- p.33Chapter 5.1 --- Background --- p.33Chapter 5.2 --- Compensation Trade --- p.33Chapter 5.3 --- Joint Exploration and Exploitation --- p.35Chapter 5.4 --- Equity Joint Venture --- p.35Chapter 5.5 --- Contractual Joint Venture --- p.37Chapter 5.6 --- Wholly Foreign Owned Enterprise --- p.38Chapter 5.7 --- Comparisons of the Three Forms of Investment --- p.39Chapter 5.8 --- Final Selection of Investment Form --- p.41Chapter 6 --- COST ANALYSIS AND CASH FLOW ANALYSIS --- p.43Chapter 6.1 --- Introduction of Cost Analysis --- p.43Chapter 6.2 --- Cash Flow Analysis --- p.53Chapter 6.3 --- Net Present Value Analysis --- p.58Chapter 7 --- CONCLUSION --- p.60APPENDEX IAPPENDIX IIAPPENDIX IIIAPPENDIX IVBIBLIOGRAPHY --- p.6
汉英同传中删减与增译现象的案例分析
No full textAuthor name used in this publication: 张其帆, Cheung Kay-fan AndrewTitle in Traditional Chinese: 漢英同傳中刪減與增譯現象的案例分析Journal title in Traditional Chinese: 中國翻譯2011-2012 > Academic research: refereed > Publication in refereed journalVersion of RecordPublishedVoR allowe
Xin li ji jiu yu wei ji shi jian he zai nan zhong zuo wei gong gong wei sheng zai nan ying dui zhun bei de ce lüe
No full textCheung, Yee Lai.Thesis Ph.D. Chinese University of Hong Kong 2014.Includes bibliographical references (leaves 193-207).Abstracts and some appendixes also in Chinese.Title from PDF title page (viewed on 02, December, 2016).Cheung, Yee Lai
Characterization of Human Papillomavirus Type 58 E7 Protein Variant T20I/G63S
No full textCheung, Pui Yiu Grace.Thesis M.Phil. Chinese University of Hong Kong 2016.Includes bibliographical references (leaves ).Abstracts also in Chinese.Title from PDF title page (viewed on …)
Minority Media Production Practices and Cultural Citizenship in Hong Kong
No full textChong, Cheung Kwan Cindy.Thesis Ph.D. Chinese University of Hong Kong 2016.Includes bibliographical references (leaves ).Abstracts also in Chinese.Title from PDF title page (viewed on …)
Directed Multigraph of Networks
No full textCheung, King Chau.Thesis Ph.D. Chinese University of Hong Kong 2016.Includes bibliographical references (leaves ).Abstracts also in Chinese.Title from PDF title page (viewed on …)
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