A Reverse Hex Solver

We present Solrex,an automated solver for the game of Reverse Hex.Reverse Hex, also known as Rex, or Misere Hex, is the variant of the game of Hex in which the player who joins her two sides loses the game. Solrex performs a mini-max search of the state space using Scalable Parallel Depth First Proof Number Search, enhanced by the pruning of inferior moves and the early detection of certain winning strategies. Solrex is implemented on the same code base as the Hex program Solver, and can solve arbitrary positions on board sizes up to 6x6, with the hardest position taking less than four hours on four threads.Comment: Presented at Computers and Games 2016 Leiden, International Conference on Computers and Games. Springer International Publishing, 201

City of Strangers: Gulf Migration and the Indian Community in Bahrain

{Excerpt} Unpacking and applying the concept of structural violence is one of the principal tasks of this book. To be clear from the outset, however, in lodging the experiences of the men and women I encountered in the larger rubric of structural violence, I do not intend to imply that we should ignore the agency exerted in the scenario I\u27ve just described, or in the scenarios that litter this book: we ought not ignore the basic fact that these scenarios are composed of humans choosing to abuse, exploit, maim, and dominate other humans. Rather, I seek to couple that basic fact with an analysis of the structural forces that cause, permit, encourage, or are in some other way involved in the production of violence between citizen and foreigner in Bahrain. In the final accounting, the episodic violence levied against foreigners in Bahrain becomes one facet of the more comprehensive structural forces that govern foreign labor in the Gulf states. The central mission of the anthropologist remains explication, and typically the explication of lives distant and different from those of the intended reader. The conceptual framework of structural violence, which I explore in detail, provides an analytic foundation from which I work outward in scope and, to some degree, backward in time. From that foundation I peer at the decisions and contexts that brought the men and women I came to know from India to the Gulf, at their experiences upon arrival in Bahrain, and at the strategies they deploy against the difficulties they face while abroad. I also examine the contours of the Bahraini state itself, the ongoing articulation of a particular idea of modernity in the Gulf, and the intricacies of the concept of citizenship as they have evolved in dialectic with the extraordinary flow of foreign labor to the island

In the Trenches at the Talent Wars: Competitive Interaction for Scarce Human Resources - A Qualitative Study

The purpose of this paper is to examine how firms are competing for scarce human resources in the talent wars. First, the paper makes the distinction between responding to labor shortages with investments in recruiting and retention and directly competing against identified labor market competitors for scarce human resources. It appears firms compete with rivals in the open labor market and in initiating and defending against talent raids. The process of identifying and responding to the tactics of labor market competitors is reviewed for both types of direct competition. Firms tend to respond to rivals’ tactics either by changing the employment relationship with threatened employees or engaging in tactics to influence the behavior of the competing firm. Factors that determine the propensity and type of response to competitor’s tactics are reviewed and integrated. The greater the threat posed by the rival’s tactics the greater the likelihood affected firms will respond with externally as opposed to internally oriented tactics. The greater the skill mobility of threatened employees, the more administrative and financial resources will be invested in the counter-response. Finally, firms use a variety of preemptive tactics to reduce the threat of talent raids. These tactics are listed and explained. The paper concludes with recommendations for firms seeking to gain or protect advantage relative to rivals in the war for talent

Energy Efficency In Housing: An Evaluation Of The Importance Of Increased Wall Thickness

In April 2002 revisions to Part L of the Building Regulations were introduced, to improve the energy efficiency of UK buildings. For many housing schemes using traditional masonry cavity walls this may result in an increased cavity width and a consequent increase in the dwelling footprint. The potential impact that this may have on site utilisation, particularly in the light of planning guidance aimed at increasing site densities, has raised concern within the development community. Developers argue that even minor increases in wall thickness may reduce the number of dwellings on sites, thereby reducing overall profitability. This paper analyses these concerns by investigating the impact of increased wall thickness in the context of two developments constructed in the late 1990s. The existing site layouts were analysed under different footprint assumptions and an assessment made of the capacity of the layout to accommodate footprint increases. The theoretical analysis demonstrates that dwelling numbers are unlikely to be reduced as a result of the standards introduced in 2002. It is only when anticipated future improved standards are applied that dwelling numbers may be affected. However, the paper demonstrates also that dwelling loss is not inevitable and that it is perfectly possible to produce very low energy housing, while still achieving densities in line with planning requirements and with no reduction in the overall quality of a scheme. In the end it is not a matter of wall thickness but of good site layout and good house type design

MiRTLE (Mixed-Reality Teaching and Learning Environment): from prototype to production and implementation

This position paper focuses on our efforts to implement and evaluate a Mixed Reality Teaching and Learning Environment (MiRTLE) in higher education institutions and other organisations, our current technical research to streamline and improve the utility of the system, and potential pedagogical developments for MiRTLE in the future

Using virtual worlds for online role-play

The paper explores the use of virtual worlds to support online role-play as a collaborative activity. This paper describes some of the challenges involved in building online role-play environments in a virtual world and presents some of the ideas being explored by the project in the role-play applications being developed. Finally we explore how this can be used within the context of immersive education and 3D collaborative environments

Evolution of Helping and Harming in Viscous Populations When Group Size Varies

Funding: Balliol College and the Royal Society.Recent years have seen huge interest in understanding how demographic factors mediate the evolution of social behavior in viscous populations. Here we study the impact of variation in group size on the evolution of helping and harming behavior. Although variation in group size influences the degree of relatedness and the degree of competition between groupmates, we find that these effects often exactly cancel, so as to give no net impact of variation in group size on the evolution of helping and harming. Specifically, (1) obligate helping and harming are never mediated by variation in group size, (2) facultative helping and harming are not mediated by variation in group size when this variation is spatial only, (3) facultative helping and harming are mediated by variation in group size only when this variation is temporal or both spatial and temporal, and (4) when there is an effect of variation in group size, facultative helping is favored in big groups and facultative harming is favored in little groups. Moreover, we find that spatial and temporal heterogeneity in individual fecundity may interact with patch-size heterogeneity to change these predictions, promoting the evolution of harming in big patches and of helping in little patches.Publisher PDFPeer reviewe

Theoretical and Empirical Challenges in Studying: The HR Practice - Firm Performance Relationship

Over the past 10 years a plethora of research has been conducted seeking to establish a relationship between human resource (HR) practices and firm performance. While this research has demonstrated promising results, a significant number of problems exist. This paper seeks to identify the theoretical and empirical challenges facing researchers who wish to further establish the impact of HR practices on firm performance. We conclude with some recommendations for future research in this area that might more accurately assess this relationship in ways that will be useful for both researchers and practitioners

Differential pressure cell Patent

Differential pressure cell insensitive to changes in ambient temperature and extreme overloa

Field-effect transistors as dc amplifiers

Field effect transistors as direct current amplifier