Surreal Time and Ultratasks

This paper suggests that time could have a much richer mathematical structure than that of the real numbers. Clark & Read (1984) argue that a hypertask (uncountably many tasks done in a finite length of time) cannot be performed. Assuming that time takes values in the real numbers, we give a trivial proof of this. If we instead take the surreal numbers as a model of time, then not only are hypertasks possible but so is an ultratask (a sequence which includes one task done for each ordinal number—thus a proper class of them). We argue that the surreal numbers are in some respects a better model of the temporal continuum than the real numbers as defined in mainstream mathematics, and that surreal time and hypertasks are mathematically possible

An error-based variational approach to computational electromagnetics

Imperial Users onl

Are backwards-infinite causal sequences possible?

Book Reviews: Alexander R. Pruss, Infinity, Causation, and Paradox, Oxford University Press, 2018, 224 pages, Print ISBN-13: 9780198810339. DOI: 10.1093/oso/9780198810339.001.000

Preventive effect of combined Er, Cr:YSGG and fluoride gel on acid resistance of the permanent tooth enamel : an in vitro study

Increasing the resistance of enamel to acids may prevent dental erosion and diminish microhardness alterations in the enamel. This study aimed to evaluate the preventive effect of erbium, chromium: yttrium, scandium, gallium, and garnet laser combined wi

Struggling for a right: Islam and the participation in sports and physical recreation of girls and women in Kuwait

This thesis was submitted for the degree of Doctor of Philosophy and awarded by Brunel University.The present study is the first of its kind. It is a study about the involvement of Kuwaiti females in sports and physical recreation. The study invesigates both the structures and resources that make female participation in sports and physical recreation possible, and the ideological and physical barriers that prevent girls and young women from taking part. The development of female sports and physical recreation in Kuwait is investigated in relation to relevant historical and political developments, taking particular account of the influence of Islamic ideologies about the role of women in society, women's enfranchisement, and women's bodies. It provides evidence from the Holy Qur'an in support of the need for girls and women to exercise their bodies. The research highlights the contradictory position that Kuwaiti women find themselves in living in a relatively liberal Islamic state with an official discourse of gender equality, but facing traditional and unequal gender divisions in daily life and throughout culture, specifically in sports and physical recreation. Opportunities for females in sports and recreation are tied to the political administration system of the state and the study looks at the present day situation of public provision and resourcing, following the liberation of the country from Iraq, as well as private resources that have developed as a result of westernized, global influences.. The study presents recommendations for Kuwaiti sports policy-makers, planners, and providers - that may be useful, too, for those in other societies in the Arabian Peninsula - concerning sports and physical recreation for Muslim girls and women in the future. The project traces the development of organised sport and physical recreation for females from 1950 until the present day. It includes details of physical education in schools, and the establishment and expansion of sport clubs and other facilities that are now in the country. Reference is made to the role of government agencies and departments - in particular the Public Authority for Youth and Sport (PAYS) that has special responsibility to establish stronger and more specialized opportunities. Since there is virtually no previous research or literature about the topic of girls and young women's involvement in sport and physical recreation in Kuwait, the main method of data collection was through questionnaires and interviews, supported by documentary evidence, including official statements.Public Authority for Applied Education and Training in Kuwai

An examination of the impact of the oil prices and economic determinants on India's economic development

The economic development of developing nations has been impacted by several factors, including the fluctuation of oil and other commodity prices due to environmental and economic degradation. This issue requires the attention of contemporary researchers and policymakers. Consequently, the current study investigates the effect of oil prices and economic determinants such as the wholesale price index, the consumer price index, inflation, and industrialization on the growth of the Indian economy. The study utilized the World Bank database from 1986 to 2020 to collect secondary data. The researchers used the Dynamic Auto-regressive Distributed Lags (DARDL) method to examine the relationships between the study's variables. The findings revealed that oil prices, the wholesale price index, the consumer price index, inflation, and industrialization positively affect India's economic growth. This study assists policymakers in formulating economic development policies with the proper emphasis on oil price fluctuations and economic determinants.Haidar Ali Al Dulaimi (College of Business and Economics, University of Babylon, Iraq)Includes bibliographical references