Early time dynamics of laser-ablated silicon using ultrafast grazing incidence X-ray scattering

Controlling the morphology of laser-derived nanomaterials is dependent on developing a better understanding of the particle nucleation dynamics in the ablation plume. Here, we utilize the femtosecond-length pulses from an x-ray free electron laser to perform time-resolved grazing incidence x-ray scattering measurements on a laser-produced silicon plasma plume. At 20 ps we observe a dramatic increase in the scattering amplitude at small scattering vectors, which we attribute to incipient formation of liquid silicon droplets. These results demonstrate the utility of XFELs as a tool for characterizing the formation dynamics of nanomaterials in laser-produced plasma plumes on ultrafast timescales

A postgraduate diploma course in community geriatrics for primary care doctors: Experience of first three years

This paper describes the setting up of a postgraduate diploma course in Community Geriatrics for primary care physicians and the experience gained in its first three years of running. This study programme was set up in response to the rapidly rising elderly population in Hong Kong and the fact that most of the primary care doctors practising today had an inadequate undergraduate curriculum in the health care issues that are relevant to older people. The objectives of the Course are to improve the knowledge, skills and confidence of primary care physicians in the care of elderly people. It also emphasises the aspects of care that are unique to elderly people. The Course is delivered by different modes of learning: distance learning, face-to-face problem-orientated seminars and small group clinical teaching. Learning centres are established in different regional hospitals in Hong Kong in order to allow small group clinical teaching while, at the same time, reducing travelling time for the students. Information technology is also used to facilitate teaching and learning, as well as to encourage communication among teachers and students. The Course was oversubscribed for all its intakes in the first three years of running. Some graduates have taken on visiting medical officer positions at elderly homes.published_or_final_versio

Aqcostic quantification and colour kinesis: evaluation of left atrial and left ventricular function in real time

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Impact of Secondhand Smoke Exposure on Smoking Cessation in Cardiac Patients

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Genetic linkage of beta and gamma subunits of epithelial sodium channel to systolic blood pressure in southern Chinese

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Changes in blood pressure after 6 years in the Hong Kong cardiovascular risk factor prevalence survey cohort

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To scale, or not to scale? : willingness-to-accept non-surgical periodontal treatment

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An analysis on reasons of non-compliant to cardiac rehabilitation programme

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Management and outcome of antenatally diagnosed congenital cystic adenomatoid malformation of the lung

Objective: To review the management and outcome of babies with antenatally diagnosed congenital cystic adenomatoid malformation. Design: Retrospective cohort review. Setting: Tertiary neonatal care unit at Queen Mary Hospital and antenatal diagnostic centre at Tsan Yuk Hospital. Patients: Consecutive patients with antenatally suspected congenital cystic adenomatoid malformation in their concepti among antenatal patients attending Tsan Yuk Hospital from 1994 to 2002. Twenty-four of 33 cases were referred to Queen Mary Hospital for postnatal management and for whom comprehensive records were available for analysis in 23. Interventions: Postnatal interventions in their babies included investigational imaging for congenital cystic adenomatoid malformation and surgery. Main outcome measures: Antenatal and postnatal outcome, as well as pathology of the excised lesions. Results: Antenatal outcome: termination of pregnancy in two cases and spontaneous abortion in one; in-utero regression was documented in nine cases and in one hydropic change was apparent. Postnatal outcome: only eight of 20 babies born alive had symptoms in neonatal period. Two developed serious infective complications in infancy, one with documented in-utero regression. Pulmonary parenchymal abnormalities were detected on computed tomography of the thorax in six of seven cases with normal or non-specific chest radiograph findings. Among nine cases with in-utero regression, congenital cystic adenomatoid malformation was confirmed by operative histology in five and abnormal computed tomography findings in three. Fifteen babies underwent surgical excision, one of whom died because of severe pre-existing pulmonary hypoplasia and nine endured minor postoperative complications. A favourable outcome was documented at a mean follow-up of 22 months (range, 2 months-7 years). Conclusions: In-utero regression of congenital cystic adenomatoid malformation on antenatal ultrasound may not represent genuine resolution. Computed tomographic thorax should be considered in all newborns with antenatally diagnosed congenital cystic adenomatoid malformation, and if confirmed early operation before first hospital discharge is recommended.published_or_final_versio

Return to work after cardiac rehabilitation

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