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

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

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

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

Behaviour of concrete filled stainless steel elliptical hollow sections

This paper presents the behaviour and design of axially loaded concrete filled stainless steel elliptical hollow sections. The experimental investigation was conducted using normal and high strength concrete of 30 and 100 MPa. The current study is based on stub column tests and is therefore limited to cross-section capacity. Based on the existing design guidance in Eurocode 4 for composite columns, the proposed design equations use the continuous strength method to determine the strength of the stainless steel material. It is found to provide the most accurate and consistent prediction of the axial capacity of the composite concrete filled stainless steel elliptical hollow sections due largely to the more precise assessment of the contribution of the stainless steel tube to the composite resistance

The co-evolution of the “social” and the “technology": a netnographic study of Social movements in virtual worlds

Virtual worlds provide new forms of social interaction. They offer alternative spaces where social functions can be carried out in online three-dimensional virtual environments. One social phenomenon which has moved into the virtual world is the social movement, which are an important means of bringing out social, cultural and political changes through collective action. These social movements exist in an immersive technological ecosystem which is constantly evolving as designers release patches which change the way users “live” within these environments. Using a biography of artifacts approach, we explore not just the evolution of the technological artifact itself (the virtual world), but also its co-evolution with the social phenomena (a social movement). Using Netnography, a modified version of ethnography, and actornetwork theory, we explore a social movement in World of Warcraft, and observe how it evolves over time as changes to the virtual world are implemented

Heating and cooling system

A heating and cooling apparatus capable of cyclic heating and cooling of a test specimen undergoing fatigue testing is discussed. Cryogenic fluid is passed through a block clamped to the speciment to cool the block and the specimen. Heating cartridges penetrate the block to heat the block and the specimen to very hot temperaures. Control apparatus is provided to alternatively activate the cooling and heating modes to effect cyclic heating and cooling between very hot and very cold temperatures. The block is constructed of minimal mass to facilitate the rapid temperature changes

Developing cross-disciplinary education by facilitating collaboration within and between diverse teams

There is currently substantial interest within Higher Education in providing modules or courses that are interdisciplinary, or cross disciplinary boundaries in one way or another. A cross-disciplinary education may benefit both the student and the educator. Yet, developing such a cross-disciplinary offer is challenging when it requires collaboration between academics more familiar working within their own silos. Particularly so, when these colleagues are also dispersed across multiple sites. This article addresses this issue by offering a personal reflection on such an educational development at the University of Westminster