Information, Trading and Stock Returns: Lessons from Dually-Listed Securities

This paper compares the intra-day patterns on the NYSE and AMEX of volatility, trading volume and bid-ask spreads for European dually- listed stocks, Japanese dually-listed stocks also listed in London, and Japanese dually-listed stocks not listed in London with American stocks of comparable average trading volume and volatility. It is shown that the intra-day patterns for these stocks are remarkably similar even though the public information flows differ markedly across these stocks during the trading day. In the morning, Japanese stocks have the greatest volatility and volume, followed by European stocks and American stocks. These rankings are reversed in the afternoon. We argue that these patterns are consistent with markets reacting to the overnight accumulation of public information which is greatest for Japanese stock and smallest for American stocks and inconsistent with the view that early morning volatility can be attributed to monopolistic specialist behavior.

Outsourcing Tools for IT

Department of ComputingRefereed conference pape

Review of ankle inversion sprain simulators in the biomechanics laboratory

Ankle inversion ligamentous sprain is one of the most common sports injuries. The most direct way is to investigate real injury incidents, but it is unethical and impossible to replicate on test participants. Simulators including tilt platforms, trapdoors, and fulcrum devices were designed to mimic ankle inversion movements in laboratories. Inversion angle was the only element considered in early designs; however, an ankle sprain is composed of inversion and plantarflexion in clinical observations. Inversion velocity is another parameter that increased the reality of simulation. This review summarised the simulators, and aimed to compare and contrast their features and settings

Kinematics analysis of ankle inversion ligamentous sprain injuries in sports: five cases from televised tennis competitions

Background: Ankle ligamentous sprain is common in sports. The most direct way to study the mechanism quantitatively is to study real injury cases; however, it is unethical and impractical to produce an injury in the laboratory. A recently developed, model-based image-matching motion analysis technique allows quantitative analysis of real injury incidents captured in televised events and gives important knowledge for the development of injury prevention protocols and equipment. To date, there have been only 4 reported cases, and there is a need to conduct more studies for a better understanding of the mechanism of ankle ligamentous sprain injury. Purpose: This study presents 5 cases in tennis and a comparison with 4 previous cases for a better understanding of the mechanism of ankle ligamentous sprain injury. Study Design: Case series; level of evidence, 4. Methods: Five sets of videos showing ankle sprain injuries in televised tennis competition with 2 camera views were collected. The videos were transformed, synchronized, and rendered to a 3-dimensional animation software. The dimensions of the tennis court in each case were obtained to build a virtual environment, and a skeleton model scaled to the injured athletes height was used for the skeleton matching. Foot strike was determined visually, and the profiles of the ankle joint kinematics were individually presented. Results: There was a pattern of sudden inversion and internal rotation at the ankle joint, with the peak values ranging from 48°- 126° and 35°-99°, respectively. In the sagittal plane, the ankle joint fluctuated between plantar flexion and dorsiflexion within the first 0.50 seconds after foot strike. The peak inversion velocity ranged from 509 to 1488 deg/sec. Conclusion: Internal rotation at the ankle joint could be one of the causes of ankle inversion sprain injury, with a slightly inverted ankle joint orientation at landing as the inciting event. To prevent the foot from rolling over the edge to cause a sprain injury, tennis players who do lots of sideward cutting motions should try to land with a neutral ankle orientation and keep the center of pressure from shifting laterally

A COMPUTATIONAL BIOMECHANICS STUDY TO INVESTIGATE THE EFFECT OF MYOELECTRIC STIMULATION ON PERONEAL MUSCLES IN PREVENTING INVERSION-TYPE ANKLE LIGAMENTOUS SPRAIN INJURY

A three-dimensional multi-body lower limb model with 16 bones and 22 ligaments was developed to study ankle ligamentous inversion sprain. A male athlete who was diagnosed with a grade I anterior talofibular ligament (ATaFL) sprain during an accidental injury in laboratory in a published report. His ankle kinematics injury data profile was computed. The effect of delivering myoelectric stimulation on peroneal muscles was simulated as torques during ankle inversion. Largest strain in the ATaFL was 8.3%, 9.0% and 11.4%, respectively, at different inversion velocity thresholds of 300 deg/s, 400 deg/s and 500 deg/s. A ligament strain/sprain more than 10-15% would lead to a ligament tear suggesting that applied muscle moments could successfully prevent ankle inversion sprain when an injury identification threshold does not reach 400 deg/s

Green Building Rating Systems and Construction Waste in High Density Urban Environment: The Case Study of Hong Kong

Hong Kong, as many other countries, is currently facing a waste management crisis with the shortage of reclamation sites and landfill space. Examination of construction waste management (CWM) criteria within Hong Kong’s BEAM Plus is limited and lacking. In this paper, CWM criteria were assessed and a case study was conducted on a recent project, pursuing BEAM Plus, to assess the effectiveness of CWM criteria to facilitate waste reduction. The findings revealed that the overall impact of BEAM Plus on construction waste reduction is negligible. The case study showed that the reasons material/waste-related credits are not commonly attempted is due to the lack of minimum thresholds and a low weighting relative to credits in other categories. In the case study, waste generated per constructed floor area was 0.21 tons/m2. This paper also makes recommendations to improve CWM criteria in BEAM Plus in order to promote a more sustainable building industry

A COMPUTATIONAL BIOMECHANICS STUDY TO INVESTIGATE THE EFFECT OF MYOELECTRIC STIMULATION ON PERONEAL MUSCLES IN PREVENTING INVERSION-TYPE ANKLE LIGAMENTOUS SPRAIN INJURY

A three-dimensional multi-body lower limb model with 16 bones and 22 ligaments was developed to study ankle ligamentous inversion sprain. A male athlete who was diagnosed with a grade I anterior talofibular ligament (ATaFL) sprain during an accidental injury in laboratory in a published report. His ankle kinematics injury data profile was computed. The effect of delivering myoelectric stimulation on peroneal muscles was simulated as torques during ankle inversion. Largest strain in the ATaFL was 8.3%, 9.0% and 11.4%, respectively, at different inversion velocity thresholds of 300 deg/s, 400 deg/s and 500 deg/s. A ligament strain/sprain more than 10-15% would lead to a ligament tear suggesting that applied muscle moments could successfully prevent ankle inversion sprain when an injury identification threshold does not reach 400 deg/s

Landfill extension developments in Hong Kong : a study of agenda setting and policy dynamics

published_or_final_versionPolitics and Public AdministrationMasterMaster of Public Administratio