Users are not the enemy

Many system security departments treat users as a security risk to be controlled. The general consensus is that most users are careless and unmotivated when it comes to system security. In a recent study, we found that users may indeed compromise computer security mechanisms, such as password authentication, both knowing and unknowingly. A closer analysis, however, revealed that such behavior is often caused by the way in which security mechanisms are implemented, and users ’ lack of knowledge. We argue that to change this state of affairs, security departments need to communicate more with users, and adopt a user-centered design approach

Inhomogeneous Boundary Value Problem for Hartree Type Equation

In this paper, we settle the problem for time-dependent Hartree equation with inhomogeneous boundary condition in a bounded Lipschitz domain in $\mathbb{R}^{N}$. A global existence result is derived.Comment: 10 page

Whether to Protect or Punish: Legal Consequences of Contravening the Corporations Act

Two major developments in corporate law have once again brought to light the impact of the legal consequences of a Company Secretary, governance professional, director or other company officer contravening the Corporations Act 2001 (Cth) [CA]. These are the High Court of Australia decision in Rich v ASIC (2004)¹ on the meaning of civil penalties and the commencement of the Corporate Law Economic Law Reform Program (Audit Reform and Continuous Disclosure) Act 2004 (Cth) [CLERP 9].² Before delving into the complex issues that have arisen from these developments in Australian corporate law and their impact on the consequences of contraventions of the law, it is necessary to view corporate litigation as a process model. This means that, if there is an alleged contravention of the law, you can put three simple questions: 1. Who can bring the legal action? (who can sue) 2. What are the legal actions? (on what grounds) and 3. What are the remedies or sanctions being claimed? (the consequences). The primary purpose of this article is to answer the third question, as this has recently gone through some important major changes. But to help put this into context, the James Hardie asbestos claims, as discussed in the Jackson QC Report³, provide a perfect example of the process model

Has the role of the Company Secretary changed: how can one person get across it all?

Legislation, the common law, equity, law reform programs, peak bodies, guidance notes, policy papers, ethics and morality are but some of the impositions on the daily life of the Company Secretary. All of these influences are ever-changing and amorphous, yet the Company Secretary is expected to deal confidently with them all on a regular basis

Are All Directors Created Equal? Reassessing the role of the chair in the light of ASIC v Rich

In 1963, on the steps of the Lincoln memorial in Washington, DC, Martin Luther King Jr made it known 'that all men are created equal'. Few people would argue with Dr King's philosophy but it would appear that company directors might be an exception to the rule. Indeed, equality in the boardroom is a different matter altogether; a difference made more palpable by the New South Wales Supreme Court decision in ASIC v Rich on 24 February 2003. The role of company directors has been in the international spotlight for some time now as a result of numerous high profile corporate collapses. Australia has not been alone in reconsidering its position on corporate governance, through, for example, the ASX's Corporate Governance Council, with the Higgs and Smith reviews in the United Kingdom and the Sarbanes-Oxley Act 2002 in the United States looking at similar issues. Predominantly, discussion concerning the chair of the board has revolved around issues of independence, with less attention being given to the legal responsibilities and accountabilities. However, these critical concerns came to the fore in the decision of Austin J in ASIC v Rich

Scaling of Anisotropic Flow and Momentum-Space Densities for Light Particles in Intermediate Energy Heavy Ion Collisions

Anisotropic flows ($v_2$ and $v_4$) of light nuclear clusters are studied by Isospin-Dependent Quantum Molecular Dynamics model for the system of $^{86}$Kr + $^{124}$Sn at intermediate energy and large impact parameters. Number-of-nucleon scaling of the elliptic flow ($v_2$) are demonstrated for the light fragments up to $A$ = 4, and the ratio of $v_4/v_2^2$ shows a constant value of 1/2. In addition, the momentum-space densities of different clusters are also surveyed as functions of transverse momentum, in-plane transverse momentum and azimuth angle relative to the reaction plane. The results can be essentially described by momentum-space power law. All the above phenomena indicate that there exists a number-of-nucleon scaling for both anisotropic flow and momentum-space densities for light clusters, which can be understood by the coalescence mechanism in nucleonic degree of freedom for the cluster formation.Comment: 8 pages, 3 figures; to be published in Physics Letters

Spin Transfers for Baryon Production in Polarized pp Collisions at RHIC-BNL

We consider the inclusive production of longitudinally polarized baryons in ${\vec p}p$ collisions at RHIC-BNL, with one longitudinally polarized proton. We study the spin transfer between the initial proton and the produced baryon as a function of its rapidity and we elucidate its sensitivity to the quark helicity distributions of the proton and to the polarized fragmentation functions of the quark into the baryon. We make predictions using an SU(6) quark spectator model and a perturbative QCD (pQCD) based model. We discuss these different predictions, and what can be learned from them, in view of the forthcoming experiments at RHIC-BNL.Comment: 28 pages, 11 figure

Parton Sum Rules and Improved Scaling Variable

The effect from quark masses and transversal motion on the Gottfried, Bjorken, and Ellis-Jaffe sum rules is examined by using a quark-parton model of nucleon structure functions based on an improved scaling variable. Its use results in corrections to the Gottfried, Bjorken, and Ellis-Jaffe sum rules. We use the Brodsky-Huang-Lepage prescription of light-cone wavefunctions to estimate the size of the corrections. We constrain our choice of parameters by the roughly known higher twist corrections to the Bjorken sum rule and find that the resulting corrections to the Gottfried and Ellis-Jaffe sum rules are relevant, though not large enough to explain the observed sum rule violations.Comment: latex, with 1 postscript figure, to be published in Phys.Lett.

Transverse Radial Flow Effects on Two- and Three-Particle Angular Correlations

We use a simple a transverse radial boost scenario coupled to PYTHIA events to illustrate the impact radial flow may have on two- and three-particle correlation functions measured in heavy-ion collisions. We show that modest radial velocities can impart strong modifications to the correlation functions, some of which may be interpreted as same side ridge and away side structure that can mimic conical emission.Comment: 7 figures, 9 pages, Material presented in part by Pruneau at HOC 07, Montreal, Canada Accepted for publication in Nucl Phys A (Jan 2008

Ratio of Λˉ/Λ\bar{\Lambda}/\Lambda in Semi-inclusive Electroproduction

It is shown that the $\bar{\Lambda}/\Lambda$ cross section ratio in semi-inclusive electroproduction of $\Lambda$ and $\bar{\Lambda}$ hyperons in deep inelastic scattering of charged lepton on a nucleon target, can provide useful information on the quark to $\Lambda$ fragmentation functions. This ratio is calculated explicitly in a quark-diquark model, a pQCD based analysis, and an SU(3) symmetry model, with three different options for the contribution from the unfavored fragmentation functions. The $x$-dependence of this ratio is sensitive to the ratio of unfavored fragmentation functions over favored fragmentation functions, $D_{\bar{u}}^{\Lambda}(z)/D_{u}^{\Lambda}(z)$, whereas the $z$-dependence is sensitive to the flavor structure of the fragmentation functions, i.e., the ratio $D_u^{\Lambda}(z)/D_s^{\Lambda}(z)$. Future measurements by the HERMES Collaboration at DESY can discriminate between various cases.Comment: 11 latex files, 6 figure