Quasi-linear viscoelastic properties of fibrotic neck tissues obtained from ultrasound indentation tests in vivo

Author name used in this publication: Sing-Fai Leung2004-2005 > Academic research: refereed > Publication in refereed journalAccepted ManuscriptPublishe

Reliability of measurement of skin ultrasonic properties in vivo : a potential technique for assessing irradiated skin

Author name used in this publication: Y. P. HuangAuthor name used in this publication: Y. P. ZhengAuthor name used in this publication: A. F. T. MakAuthor name used in this publication: S. F. Leung2006-2007 > Academic research: refereed > Publication in refereed journalAuthor’s OriginalPublishe

Secondhand smoke exposure and maternal action to protect children from secondhand smoke: Pre- and post-smokefree legislation in Hong Kong

Background: Smokefree legislation may protect children from secondhand smoke (SHS) in the home from smoking parent(s). We examined the effect of the 2007 smokefree legislation on children's exposure to SHS in the home and maternal action to protect children from SHS exposure in Hong Kong. Methods: Families with a smoking father and a non-smoking mother were recruited from public clinics before (2005-2006, n = 333) and after the legislation (2007-2008, n = 742) which led to a major extension of smokefree places in Hong Kong. Main outcomes included children's SHS exposure in the home, nicotine level in mothers' and children's hair and home environment, mothers' action to protect children from SHS, and their support to the fathers to quit. Results: Fewer mothers post-legislation reported children's SHS exposure in the home (87.2% versus 29.3%, p<0.01), which was consistent with their hair nicotine levels (0.36ng/mg versus 0.04ng/mg, p<0.01). More mothers post-legislation in the last month took their children away from cigarette smoke (6.3% versus 92.2%; p<0.01) and advised fathers to quit over 3 times (8.3% versus 33.8%; p<0.01). No significant change was found in the content of smoking cessation advice and the proportion of mothers who took specific action to support the fathers to quit. Conclusions: SHS exposure in the home decreased and maternal action to protect children from SHS increased after the 2007 smokefree legislation. Maternal support to fathers to quit showed moderate improvement. Cessation services for smokers and specific interventions for smoking families should be expanded together with smokefree legislation. © 2014 Chan et al.published_or_final_versio

Synthesis of wurtzite ZnSe nanorings by thermal evaporation

In this study, free standing crystalline ZnSe nanorings and nanowires have been fabricated on Au coated Si substrates by simple thermal evaporation of ZnSe powders. Ring- or wirelike morphology can be achieved in a controllable manner by using different reactor pressures during growth, while all the other conditions remain the same. Our results show that the ZnSe nanorings are wurtzite phase instead of the zinc-blende phase, observed in typical one-dimensional ZnSe nanostructures. The growth mechanism of the nanorings has been discussed, and the cathodoluminescence of the nanorings has been described. © 2006 American Institute of Physics.published_or_final_versio

Synthesis and analysis of abnormal wurtzite ZnSe nanowheels

An abnormal structure of the ZnSe nanowheels composed of teethlike extended patterns on nanoring bases has been successfully synthesized by thermal evaporation method. It is interesting to note that the as-synthesized ZnSe nanowheels are metastable wurtzite phase with the dominant exposed surfaces of ± (2 1- 1- 0) while the stable ZnSe is typically zinc blende phase. A full picture of the growth mechanism of the metastable wurtzite phase ZnSe nanostructures will be proposed from the thermodynamic point of view. Meanwhile, the formation of the nanowheels is also explained by a two-stage mechanism. In the first stage, the base of the nanowheel begins to form by vapor-solid mechanism, while in the second stage, the teethlike extended structures grow through the self-catalyzed growth process. The cathodoluminescence spectrum of ZnSe nanowheel exhibited a band edge transition at about 460 nm and a strong self-activated luminescence at 610 nm. It is important to note that the discussions of the nanostructure thermodynamics and stability can be applied to understand the growth mechanism of other nanostructures which are critical for optimization of the nanostructures. © 2007 American Institute of Physics.published_or_final_versio

Real-time ultrasonic assessment of progressive proteoglycan depletion in articular cartilage

2008-2009 > Academic research: refereed > Publication in refereed journalAccepted ManuscriptPublishe

O estranhamente familiar na obra de Attilio Colnago

Esta dissertação investiga o unheimlich em português, 'estranhamente familiar' -, conceito psicanalítico desenvolvido por Sigmund Freud, em obras que fazem parte de 4 (quatro) séries do trabalho do artista plástico Attilio Colnago: "Do Retorno às Meias Verdades", 10 + 1 Perigosas Maneiras de Amar", "Minas das Liberdades Gerais" e "Diálogos com a Paixão". Aproxima as obras do artista já tão conhecidas por seus aspectos principais tais como a presença da figura humana, os espaços interiores, o sagrado em um contraponto com o profano, e as memórias do estranhamente familiar. Para tanto, pesquisou-se a bibliografia ligada ao tema, que teve como ponto de partida o ensaio de Freud de 1919, "Das Unheimliche", traduzido para o português como "O Estranho" e prosseguiu-se através de escritos de outros autores que se interessam pelo conceito de estranhamente familiar, trazendo-o para a contemporaneidade e associando-o a outras áreas do conhecimento, entre eles Nicholas Royle, Anneleen Masschelein e Anthony Vidler. Com base na teoria estudada foram selecionadas, dentre as séries escolhidas, as obras mais significativas em relação ao tema para serem analisadas. Busca-se desvendar e analisar um lado ainda não investigado da obra do artista e ao mesmo tempo mostrar a importância de se estudar o conceito de estranhamente familiar no campo das artes plásticas.This research is focused on graphite as a possible urban expressions in Vila Velha, metropolitan region of Vitória, state of Espírito Santo. In order to understand it in contemporary times, it was necessary brief historical approach as well as the survey of theories about the architectural-urban planning. Such elements assisted in traffic for concepts - world - until contribute, finally, in the city of Vila Velha. Moreover, the historical inquiry from the 1960s illustrates the two main poles of graphite: Europe, May 1968 and the United States and, in particular, its incorporation as a tripod supporting the Hip-Hop movement. Also have a preview of how this global phenomenon is reproduced in Brazil and specifically in Vila Velha city. The support references; theses; dissertations, websites and complementary character - but not least, interviews and conversations and emails made to its practitioners, especially the graffiti artist Bertz, is relevant to understanding the actions of graffiti and taggers. The study recognizes them and illustrates the magnitude of the diffusion inherent in graffiti and graffiti aesthetics in various environments and media, with emphasis on its transgressive character while working out one of his paradoxes: a feedback system of consumer goods cultural that prays deniesand sometimes enables its existence