6,146 research outputs found
A new operational matrix based on Bernoulli polynomials
In this research, the Bernoulli polynomials are introduced. The properties of
these polynomials are employed to construct the operational matrices of
integration together with the derivative and product. These properties are then
utilized to transform the differential equation to a matrix equation which
corresponds to a system of algebraic equations with unknown Bernoulli
coefficients. This method can be used for many problems such as differential
equations, integral equations and so on. Numerical examples show the method is
computationally simple and also illustrate the efficiency and accuracy of the
method
THE EFFECTS OF A VIRTUAL REALITY SIMULATOR ON FORMATIVE AND SUMMATIVE ASSESSMENT METHODS FOR DENTAL CLINICAL SKILLS
Dental students’ psychomotor skills are being assessed implicitly by formative feedbacks during clinical laboratory sessions and through knowledge-based questions and practical performance measurements given in forms of summative assessments such as a Clinical Skills Examinations (CSE) and Objective Structured Clinical Examinations (OSCE). Preliminary results from the three BDS Year 1 groups showed a moderate association between some of the psychomotor skills and CSE and OSCE results (1st Cohort BDS1 2007/2008, 2nd Cohort BDS1 2008/2009 and 3rd Cohort BDS1 2009/2010)
Dimensionality-driven spin-flop transition in quasi-one-dimensional PrBa2Cu4O8
In the quasi-one-dimensional cuprate PrBaCuO, the Pr cations
order antiferromagnetically at 17 K in zero field. Through a combination of
magnetic susceptibility, torque magnetometry, specific heat and interchain
transport measurements, the anisotropic temperature-magnetic field phase
diagram associated with this ordering has been mapped out. A low-temperature
spin-flop transition in the Pr sub-lattice is found to occur at the same
magnetic field strength and orientation as a dimensional crossover in the
ground state of the metallic CuO chains. This coincidence suggests that the
spin reorientation is driven by a change in the anisotropic
Rudermann-Kittel-Kasuya-Yosida (RKKY) interaction induced by a corresponding
change in effective dimensionality of the conduction electrons.Comment: 8 pages, 8 figure
Breach of continuous disclosure in Australia
Given that disclosure is important for the efficient functioning of capital markets, this paper explores the impact of infringement of continuous disclosure by Australian listed firms. We observe a significantly negative market reaction for our sample firms around the day an infringement is announced. Our findings also provide partial evidence of an increase in spreads and a decrease in price informativeness following the announcement of a breach. Overall, our results indicate that the market considers the breach of continuous disclosure to be a relatively important incident
Why do financial literacy programmes fail?
Numerous studies have found a positive relationship between financial literacy and financial experience. Typically, this relationship is interpreted as being a causal relationship, i.e. an increase in financial literacy leads to better financial decision making. However, a simple relationship cannot be interpreted in a causal way. In this paper, we show evidence for a causal relationship running the opposite way, i.e. people with more financial experience seem to acquire more financial knowledge and become more financially literate. This finding has important implications as it suggests that programmes targeted at improving financial literacy could be more effective if they incorporate experiential components
Do criminal sanctions deter insider trading?
Many developed markets have taken what appears to be a tough stance on illegal insider trading through the use of criminal sanctions. Although criminal sanctions represent a much greater penalty than civil sanctions, the higher burden of proof required makes their enforceability weaker. This trade-off between severity and enforceability makes the impact of criminal sanctions ambiguous. In this paper, we empirically examine this issue by studying the deterrence of insider trading following the introduction of criminal sanctions in a developed market. Significant changes in sanction regimes are rare, especially when criminal sanctions are introduced without other changes. In February 2008, New Zealand introduced criminal sanctions for insider trading. This change of law offers a unique setting in which to examine the deterrence effect of criminalization. Using measures for the cost of trading, degree of information asymmetry, and probability of informed trading, we find that the enactment of this law led to a worsening in these measures. These findings suggest that the weaker enforceability of criminalization outweighs the associated increased severity of the penalties
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