119,661 research outputs found
Letter, [Author unclear] to Paulina T. Merritt
No full textHandwritten letter to Paulina Merritt from an unknown author, October 1, 1876.
Uso de indicadores de desempenho como auxílio nos estudos de eficiência energética em sistemas de abastecimento de água.
No full textA Review of silicon carbide development in MEMS applications
No full textDue to its desirable material properties, Silicon Carbide (SiC) hasbecome an alternative material to replace Si for MicroelectromechanicalSystems (MEMS) applications in harsh environments. To promote SiC MEMSdevelopment towards future cost-effective products, main technology areas inmaterial deposition and processes have attracted significant interest. Thedevelopments in these areas have contributed to the rapid emergence of SiCMEMS prototypes. In this paper, we give an overview of the importantdevelopments in SiC material formation and fabrication processes in recentyears. Some of the most interesting state-of-the-art SiC MEMS devices arereviewed. This highlights the major progresses in SiC MEMS developed thusfar. This paper also looks into the prospect of SiC MEMS drawing attention topotential issues
HIFU 治疗患有肝硬化的原发性肝癌病人
No full textHepatocellular carcinoma (HCC) is one of the commonest cancers in Asia. However, only a small amount of patients is eligible for surgical intervention upon diagnosis. Treatment planning for patients with HCC remains a great challenge to most clinician. In Asia, most of the HCC patients are hepatitis B carrier. The bad combination of liver cancer and hepatitis B related cirrhosis make liver resection impossible in most of the patients.1 Radiofrequency ablation (RFA) is one of the very effective and simple treatment methods for HCC which can achieve survival similar to liver resesction for HCC smaller than 2cm. However, RFA may not be well tolerated in patients with cirrhosis and severe complication may follow after prolonged ablation.2 Transarterial choemoembolization (TACE) is a widely used treatment option for unresectable HCC and its effect has been shown to be better by best symptomatic treatment by randomised controlled studies.3 However, the survival outcome of TACE is not very appealing as the 2 year survival is around 30%. High intensity focused ultrasound (HIFU) is a totally non invasive ablation treatment modality. 4. Our center started offering HIFU treatment in 2006 as a non-invasive mode of surgical ablation for patients who could not tolerate liver resection because of poor liver reserve.5. Our initial results showed that the complete ablation rate with single ablation was 89.2%.6. Up to date, we have performed more than 200 cases of HIFU ablation to treat HCC and no postoperative liver failure has been recorded. HIFU ablation was safely performed in the present case even though the patient had thrombocytopenia. The unique needleless design of the HIFU system makes HIFU ablation superior to RFA, for needle penetration may induce hemorrhage from a hypervascular tumor in a patient with coagulopathy and low platelet count. Furthermore, without needle
puncture, there is no risk of direct tumor seeding to the surrounding major vessels. 4,7 In conclusion, HIFU ablation is a potentially curative measure which seems to be safe and effective for patients with unresectable HCC.
References
1. Cheung TT, Ng KK, Chok KS, Chan SC, Poon RT, Lo CM, Fan ST. Combined resection and radiofrequency ablation for multifocal hepatocellular carcinoma: prognosis and outcomes. World J Gastroenterol 201 O; 16:3056-3062.
2. Cheung TT, Ng KK, Poon RT, Fan ST. Tolerance of radiofrequency ablation by patients of hepatocellular carcinoma. J Hepatobiliary Pancreat Surg 2009; 16:655-660.
3. Lo CM, Ngan H, Tso WK, Liu CL, Lam CM, Poon RT, Fan ST, Wong J. Randomized controlled trial of transarterial lipiodol chemoembolization for unresectable hepatocellular carcinoma. Hepatology 2002; 35: 1164-1171.
4. Cheung TT, Chok KS, Lo RC, Sharr WW, Chan SC, Poon RT, Fan ST, Lo CM. High-intensity focused ultrasound ablation as a bridging therapy for hepatocellular carcinoma patients awaiting liver transplantation. Hepatobiliary Pancreat Dis Int 2012;11:542-544.
5. Ng KK, Poon RT, Chan SC, Chok KS, Cheung TT, Tung H, Chu F, Tso WK, Yu WC, Lo CM, Fan ST. High-intensity focused ultrasound for hepatocellular carcinoma: a single-center experience. Ann Surg 2011; 253:981-987.
6. Cheung TT, Fan ST, Chu FS, Jenkins CR, Chok KS, Tsang SH, Dai WC, Chan AC, Chan SC, Yau TC, Poon RT, Lo CM. Survival analysis of high-intensity focused ultrasound ablation in patients with small hepatocellular carcinoma. HPB (Oxford) 2012.
7. Cheung TT, Poon RT, Yau T, Tsang OS, Lo CM, Fan ST. High-intensity focused ultrasound as a treatment for colorectal liver metastasis in difficult position. Int J Colorectal Dis 2012; 27:987-988
King-Kok Cheung, éd. An Interethnic Companion to Asian American Literature
No full textFeith Michel. King-Kok Cheung, éd. An Interethnic Companion to Asian American Literature . In: Revue Française d'Etudes Américaines, N°79, janvier 1999. L'Amérique du Nord existe-t-elle ? pp. 121-122
Education reform as an agent of change: the development of media literacy in Hong Kong during the last decade
No full textAlthough media education is a comparatively new area of studies in Hong Kong, it is already flourishing. Why? This contribution identifies the education reform as an important factor in encouraging the development of media education in the last decade, and the three major driving forces of this reform have been: the emphasis on civic education since Hong Kong’s return to China sovereignty, the introduction of information technology (ICT), and the recent review of the curriculum. The author also aims to find out whether the patterns used in media education development are their own Asian models or, on the contrary, they follow Wes tern patterns
King-Kok Cheung, éd. An Interethnic Companion to Asian American Literature
No full textFeith Michel. King-Kok Cheung, éd. An Interethnic Companion to Asian American Literature . In: Revue Française d'Etudes Américaines, N°79, janvier 1999. L'Amérique du Nord existe-t-elle ? pp. 121-122
Induced nostalgia increases optimism (via social-connectedness and self-esteem) among individuals high, but not low, in trait nostalgia
No full textNostalgia, a sentimental longing for the past, is not merely a past-oriented emotion, but has implications for the future. Experimentally induced nostalgia fosters optimism by increasing social-connectedness (a sense of acceptance and belongingness) and self-esteem. Do these effects depend on trait nostalgia (i.e., proneness to nostalgic engagement)? Consistent with past research, induced nostalgia fostered optimism, and this effect was mediated by social-connectedness and self-esteem. More important, these effects uniquely applied to participants who were high, but not low, on trait nostalgia. That is, induced nostalgia (vs. control) was indirectly linked to heightened optimism through social-connectedness and self-esteem, for nostalgia prone individuals. Proneness to nostalgic engagement, when coupled with momentary nostalgia, confers benefits, not only in terms of greater social-connectedness and self-esteem, but also in terms of higher optimism
- …
