Improving chiral property of domain-wall fermions by reweighting method

The reweighting method is applied to improve the chiral property of domain-wall fermions. One way to achieve this is to enlarge $L_s$, the size of fifth dimension, which controls the size of the induced chiral symmetry breaking. While this is a type of reweighting method for shifting the action parameter, it seems non-trivial since this reweighting means change of the five dimensional lattice volume. In this report, we address issues in this direction of reweighting and evaluate its effectiveness.Comment: 7 pages, talk presented at The XXVII International Symposium on Lattice Field Theory, July 26-31 2009, Peking University, Beijing, Chin

Chaco Landscapes: Data, Theory and Management

The Colorado Plateau is a land of long horizons punctuated by dramatic buttes, mesas, and mountain ranges. The rich cultural heritage and natural beauty of this region hold meaning for the millions of tourists who visit each year to experience this iconic landscape. Many of these same places on the Plateau are still considered central to indigenous religious practices, histories, and oral traditions of descendent communities in the region. This landscape is also defined by the complex connections and histories of diverse resident communities. Ancient communities of the Plateau are the focus of ongoing major anthropological investigations into such issues as Neolithic demography and agriculture, emergent sociopolitical complexity, and human impact on the environment. In short, Chacoan archaeology has many stakeholders. Chaco Canyon is a UNESCO World Heritage Site, important not only for contemporary indigenous peoples and archaeologists but for all of humanity. It preserves a unique aspect of the human experience and draws over 40,000 visitors yearly to witness its grandeur and Native history. The confounding aspect of this cultural chapter is precisely its scope and formal expression across such a vast landscape. It was not until the 1970s that archaeologists fully grasped the extent of the ancient Chacoan roadways and thus the scope of the Chaco world. Forty years later, we are still struggling to understand this spatial and temporal complexity, trying to determine the connections and human experiences of those who built and traversed these roads, great houses, shrines, and kivas. Chaco was not a single locality, nor was it merely a series of discrete localities or elements; management decisions that reduce this landscape to dots on a map threaten to destroy the most compelling, least-understood, and perhaps most significant aspect of this phenomenon. A century of research has shown that Chaco was comprised of relationships and shared symbols. Our ability to resolve many of the remaining research issues outlined above depends upon the protection of this landscape in a way that honors both what is known and what we still have to learn. The goal of this paper is to provide an academic overview regarding the Chaco landscape: what it is, what we know about it, how we know what we know, and what we still have to learn. The purpose is to provide a comprehensive tool that can be used for management purposes. The text provides a summary road map while appendices to this document contain supporting information and broader discussions. The paper is divided into 7 sections: (1) introduction to Chaco in time and space; (2) management history and considerations; (3) landscape theory; (4) defining the Chaco landscape, part one – the material elements; (5) research issues; (6) defining the Chaco landscape, part two – the experiential elements; and (7); concluding arguments. In the main body of this paper we lay out our primary points; supporting data and additional discussion for each section is found in corresponding appendices

Luck & Skill: Black Swans & Machiavelli\u27s Ideas on Power, Fortune, Virtu

We hear all the time about the value of hard work and perseverance, and the part they play in the professional life of successful people. What we do not hear so much about are the many professionals who work hard and persevere, yet never seem to quite reach the level of success they aim for. Some current authors are beginning to give more attention to the part luck/black swans/outliers play in success. This is not a new phenomenon, Machiavelli had a lot to say about it back in the Renaissance. So how can knowledge of this dynamic help in a modern organization

The Emergent Logic of Health Law

The American health care system is on a glide path toward ruin. Health spending has become the fiscal equivalent of global warming, and the number of uninsured Americans is approaching fifty million. Can law help to divert our country from this path? There are reasons for deep skepticism. Law governs the provision and financing of medical care in fragmented and incoherent fashion. Commentators from diverse perspectives bemoan this chaos, casting it as an obstacle to change. I contend in this Article that pessimism about health law’s prospects is unjustified, but that a new understanding of health law’s disarray is urgently needed to guide reform. My core proposition is that the law of health care provision is best understood as an emergent system. Its contradictions and dysfunctions cannot be repaired by some master design. No one actor has a grand overview—or the power to impose a unifying vision. Countless market players, public planners, and legal and regulatory decisionmakers interact in oft-chaotic ways, clashing with, reinforcing, and adjusting to each other. Out of these interactions, a larger scheme emerges—one that incorporates the health sphere’s competing interests and values. Change in this system, for worse and for better, arises from the interplay between its myriad actors. By quitting the quest for a single, master design, we can better focus our efforts on possibilities for legal and policy change. We can and should continuously survey the landscape of stakeholders and expectations with an eye toward potential launching points for evolutionary processes—processes that leverage current institutions and incentives. What we cannot do is plan or predict these evolutionary pathways in precise detail; the complexity of interactions among market and government actors precludes fine-grained foresight of this sort. But we can determine the general direction of needed change, identify seemingly intractable obstacles, and envision ways to diminish or finesse them over time. Dysfunctional legal doctrines, interest group expectations, consumers’ anxieties, and embedded institutional and cultural barriers can all be dealt with in this way, in iterative fashion. This Article sets out a strategy for doing so. To illustrate this strategy, I suggest emergent approaches to the most urgent challenges in health care policy and law—the crises of access, value, and cost

Information sharing and its integrative role: An empirical study of the malt barley value chain in Ethiopia

Purpose - The objective of this paper is to describe the volume and quality of information and communication channel use at various stages of the malt barley value chain in Ethiopia and to investigate how metrics of these variables influence the extent of integration of the chain. Design/methodology/approach - The study is based on survey data collected from 320 farmers and 100 traders and interview responses captured from76 respondents. Descriptive statistics and ordered logistic regression were used for data analysis. Findings - The descriptive statistics show a lower volume and poor quality of information is being shared at farmer-trader interface and that value chain integration is weak at all studied interfaces. Results of ordered logistic regression show that information volume and quality positively influence value chain integration, whereas a positive relationship between channel use and value chain integration was found only at farm level interfaces. Evidences found suggested that inconsistent information systems, lack of information sharing plans, low level of members’ awareness about the value of information, and lack of trust to share information were factors that inhibited information sharing in the malt barley value chain. Originality/Value - The study offers pioneering evidence of the relative role of information volume and quality and channel use as factors that influence the extent of integration of the value chain