Let A be a Coxeter arrangement of rank ℓ. In 1987 Orlik, Solomon and Terao conjectured that for every 1≤d≤ℓ, the first d exponents – when listed in increasing order are realized as free restriction to some intersection reflecting hyperplanes dimension d. This conjecture does follow from rather extensive case-by-case studies by Orlik 1992 1993, where they show all restrictions arrangements free....

BACKGROUND Insufficient social security combined with family structure changes has resulted in a poverty of the elderly. The objective of this study was to examine an association of living arrangements of the elderly with chronic disease prevalence and prescription drug use. METHODS 2008 Korea Health Panel Survey (KHPS) data were used in this study. Information on living arrangements, socio-d...

It is vividly debated how the ongoing process of European integration will a¤ect the need and scope for welfare state activities. To some this process signals that welfare state activities have to be rolled back, while others stress that international integration may increase the need for (explicit or implicit) social insurance arrangements. This paper discusses these issues by first considerin...

This paper investigates the relationship between health shocks and labour market outcomes in 9 European countries using the European Community Household Panel. Matching techniques are used to control for the non-experimental nature of the data. The results suggest that there is a significant causal effect from health on the probability of employment: individuals who incur a health shock are sig...

Chemical safety is acknowledged by Agenda 21 as one of the most serious problems worldwide, involving governance at the national and international levels. In Brazil, chemical safety problems have increased in intensity and extent, far beyond the capacity to deal with them. The problems are all the more serious in Brazil because issues of democracy, security, sustainability, and equity, all fund...

The Student Association Senate formally notified Dean of Students Frederick Wierum yesterday of their intention to sponsor the appearance of Abbie Hoffman and Leonard Weinglass. The notification, which is a policy requirement, was accompanied by a formal request to use the facilities of the Rice gymnasium to hold the event. The SA voted Tuesday to invite the radical speakers after the Student C...

A potentially serious problem with current payment systems is that their underlying hard problems from number theory may be solved by either a quantum computer or unanticipated future advances in algorithms and hardware. A new quantum payment system is proposed in this paper. The suggested system makes use of fundamental principles of quantum mechanics to ensure the unconditional security witho...

Various tax policies provide consumers with forms of insurance. Social security has the payoff characteristics of an annuity. The income tax provides consumers with a degree of Income insurance because the government shares part of the individual's income risk. Redistributive taxes can be used to spread aggregate income risks across different generations The effects of these and other tax polic...

By introducing repo markets we understand how agents need to borrow issued securities before shorting them: (re)-hypothecation is at the heart of shorting. Non-negative amounts of securities in the box of an agent (amounts borrowed or owned but not lent on) can be sold, and recursive use of securities as collateral allows agents to leverage their positions. A binding box constraint induces a li...

A potentially serious problem with current payment systems is that their underlying hard problems from number theory may be solved by either a quantum computer or unanticipated future advances in algorithms and hardware. A new quantum payment system is proposed in this paper. The suggested system makes use of fundamental principles of quantum mechanics to ensure the unconditional security witho...