Characterization of Alpha Beta Nitride in Buried Nitride SOI Substrate

Poon, M. C.,Kwong, S.,Wong, H. 대한전자공학회 1991 ICVC : International Conference on VLSI and CAD Vol.2 No.1

Buried nitride SOI substrates prepared using stationary beam synthesis have been characterized. Both α- and β- phae silicon nitride layers have been found to form in the SOI substrate under different implantation and anneling conditions. While both nitrides are found to have good material qualities, the α nitride is found to have better insulating property than the β nitride. As β nitride is first reported in buried nitride SOI and its formation is known to be more stringent than the α nitride, preliminary studies on the nitride formation kinetics will also be discussed.

Three-Dimensional Television using Optical Scanning Holography

Poon, Ting-Chung The Korean Infomation Display Society 2002 Journal of information display Vol.3 No.3

We first review a real-time three-dimensional (3-D) holographic recording technique called optical scanning holography (OSH) and discuss holographic reconstruction using spatial light modulators (SLMs). We then present how the overall system can be used for 3-D holographic television (TV) display with a wide-angle view of a 3-D image, and address some of the issues encountered. Finally, we suggest some techniques to alleviate the issues encountered in such a 3-D holographic TV system.

Dynamic Reservation Scheme of Physical Cell Identity for 3GPP LTE Femtocell Systems

Poon Gup Lee,Jang Keun Jeong,Navrati Saxena,Ji Tae Shin 한국정보처리학회 2009 Journal of information processing systems Vol.5 No.4

Anything Goes?

Poon, Dennis,Joseph, Leonard Council on Tall Building and Urban Habitat Korea 2012 International journal of high-rise buildings Vol.1 No.1

When Cole Porter wrote the song "Anything Goes" in 1934, he did not include skyscraper examples. The recently completed Chrysler and Empire State buildings followed decades of tall building development in a logical and predictable line. Today, dramatic improvements in materials and methods of analysis, design and fabrication have given architects and engineers freedom to imagine, and contractors to build, towers in configurations never seen before. If writing now, Porter would surely have mentioned such designs to demonstrate anything goes. Or does it? This article explores the possibilities and challenges of tall building structural design through current and proposed projects. Examples include engineering buildings with outward forms that appear structurally unfavorable and taking advantage of load reduction through shaping opportunities.

Online Higher Education in Hong Kong : The state, the Market, and the Universities

POON, LAI-MAN,PHILIP KWOK-FAI HUI 이화여자대학교 국제통상협력연구소 2001 Jounal of APEC Studies Vol.3 No.1

Global trends have led to marketization of higher education. The rapid development of Information Technology and the Internet challenge the established paradigms of educational enterprise. Hong Kong has restructured its economy in line with the Asian Pacific region and is undergoing change in order to establish itself as service based and technologically driven. This paper addresses online higher education in Hong Kong, with a focus on non-government funded continuing and professional education. Three cases of online education courses organized by public funded universities are identified together with online higher and continuing education in the private sector. Public-private partnership is developed between the higher education institutes(HEI) and the online education service providers. The state intervention is only on traditional higher education programmes but the area of cyber education for adults is left to the market.

Wearable Intelligent Systems for E-Health

Poon, Carmen C.Y.,Liu, Qing,Gao, Hui,Lin, Wan-Hua,Zhang, Yuan-Ting Korean Institute of Information Scientists and Eng 2011 Journal of Computing Science and Engineering Vol.5 No.3

Due to the increasingly aging population, there is a rising demand for assistive living technologies for the elderly to ensure their health and well-being. The elderly are mostly chronic patients who require frequent check-ups of multiple vital signs, some of which (e.g., blood pressure and blood glucose) vary greatly according to the daily activities that the elderly are involved in. Therefore, the development of novel wearable intelligent systems to effectively monitor the vital signs continuously over a 24 hour period is in some cases crucial for understanding the progression of chronic symptoms in the elderly. In this paper, recent development of Wearable Intelligent Systems for e-Health (WISEs) is reviewed, including breakthrough technologies and technical challenges that remain to be solved. A novel application of wearable technologies for transient cardiovascular monitoring during water drinking is also reported. In particular, our latest results found that heart rate increased by 9 bpm (P < 0.001) and pulse transit time was reduced by 5 ms (P < 0.001), indicating a possible rise in blood pressure, during swallowing. In addition to monitoring physiological conditions during daily activities, it is anticipated that WISEs will have a number of other potentially viable applications, including the real-time risk prediction of sudden cardiovascular events and deaths.

Identification of nonlinear elastic structures using empirical mode decomposition and nonlinear normal modes

Poon, C.W.,Chang, C.C. Techno-Press 2007 Smart Structures and Systems, An International Jou Vol.3 No.4

The empirical mode decomposition (EMD) method is well-known for its ability to decompose a multi-component signal into a set of intrinsic mode functions (IMFs). The method uses a sifting process in which local extrema of a signal are identified and followed by a spline fitting approximation for decomposition. This method provides an effective and robust approach for decomposing nonlinear and non-stationary signals. On the other hand, the IMF components do not automatically guarantee a well-defined physical meaning hence it is necessary to validate the IMF components carefully prior to any further processing and interpretation. In this paper, an attempt to use the EMD method to identify properties of nonlinear elastic multi-degree-of-freedom structures is explored. It is first shown that the IMF components of the displacement and velocity responses of a nonlinear elastic structure are numerically close to the nonlinear normal mode (NNM) responses obtained from two-dimensional invariant manifolds. The IMF components can then be used in the context of the NNM method to estimate the properties of the nonlinear elastic structure. A two-degree-of-freedom shear-beam building model is used as an example to illustrate the proposed technique. Numerical results show that combining the EMD and the NNM method provides a possible means for obtaining nonlinear properties in a structure.

ASCI 2022: Report of Scientific Programme

Poon William Wai Lun,Cheung Stephen Chi Wai,Chan Carmen Wing Sze 아시아심장혈관영상의학회 2022 Cardiovascular Imaging Asia Vol.6 No.3

Poster Session:PS 0538 ; Nephrology : Peritoneal Transport and Mesothelial Damage of C-Reactive Protein Transgenic Mice Undergoing Peritoneal Dialysis

( Pyk Poon ),( Bch Kwan ),( Hy Lan ),( Xr Huang ),( Cc Szeto ),( Pkt Lii ) 대한내과학회 2014 대한내과학회 추계학술대회 Vol.2014 No.1

Background: C-reactive protein (CRP) is a mediator of systemic infi ammation. Peritoneal dialysis (PD) is known to cause peritoneal infi ammation and fi brosis. We study the degree of peritoneal infi ammation and fi brosis in CRP-transgenic (Tg) mice before and after PD treatment. Methods: Wild-type (WT) and CRP-Tg C57 mice (all male, 10-12 weeks old) were injected intra-peritoneally with 4.25% dextrose PD solution (3ml/mouse) daily for 28 days, followed by a 4-hour peritoneal equilibration test (PET). The mice were then sacrifi ced. Parietal peritoneum and omental tissues were collected for the assessment of infi ammation and fi brosis. Results: After 28 days of PD, CRP-Tg mice had higher dialysate creatinine and dialysate- to-plasma (D/P) creatinine ratio than WT mice. Parietal peritoneum of the CRP-Tg mice was more cellular than that of the WT mice. CRP-Tg mice also had higher connective tissue growth factor (CTGF), intercellular adhesion molecule 1 (ICAM1) and tumor necrosis factor a (TNFa) RNA expressions as well as immunohistochemical staining in the parietal peritoneum than the WT mice. In addition, CRP-Tg mice had significantly more a-smooth muscle actin (aSMA) in the parietal peritoneum and omentum than WT mice. Conclusions: CRP-Tg mice have signifi cantly more infi ammation and fi brosis than WT mice after PD treatment. Our results suggest that CRP is an important mediator of the infi ammation and fi brosis induced by PD. The implication of our results to human PD therapy needs further investigation.

THE IMPACT OF NEGATIVE BRAND PUBLICITY ON HOTEL CONSUMERS IN CHINA

Patrick Poon,Lishan Xie,Teng Gao 글로벌지식마케팅경영학회 2014 Global Marketing Conference Vol.2014 No.11

Negative publicity can be defined as negative information about a product, a service, a brand, an organization or an individual that is circulated through mass media such as print media and broadcast media (Dean, 2004; O'Guinn, Allen, & Semenik, 2011). Indeed, there has been a growing interest in the marketing literature concerning the effects of negative brand publicity on consumer perceptions and evaluations (Cleeren, van Heerde, & Dekimpe, 2013; Dills & Hernández Julián, 2012; Pullig, Netemeyer & Biswas, 2006; Thirumalai & Sinha, 2011). Negatively publicized instances such as defective products/services or unethical business practices are likely to impair a brand’s image and its equity. However, previous literature has mainly focused on the effect of performance-related negative publicity on consumer responses and there are limited studies about the effect of value- or ethics-related negative publicity. Owing to the inherent characteristics of inseparability and intangibility, hospitality managers need to pay particular attention to ethical issues and the detrimental impact of value-related negative publicity. This study aims to examine the impact of negative brand publicity on hotel consumers for two types of negative publicity (namely, performance-related and value-related). A content analysis and a consumer survey were conducted in China so as to investigate the hotel recovery strategy and consumer responses toward negative publicity. The content analysis was performed on two largest local daily newspapers in China. It showed that the occurrence of value-related negative publicity (e.g., not keeping promises, or dishonesty) was much greater than performance-related negative publicity (e.g., untidy room, or equipment malfunction) in China’s hotel industry. Compensations appeared to be the most common method for hotel responses toward the two types of negative publicity. The consumer survey showed that consumer responses such as hotel evaluations and patronage intentions were negatively affected by negative brand publicity. Female consumers were found to be more sensitive to unethical issues than male consumers. In other words, females were more negatively affected by value-related publicity than performance-related publicity. Managerial implications for hospitality managers are discussed.