다중혈관 관상동맥 환자에서 y-문합을 이용하여 양쪽 내흉동맥만을 사용한 우회술의 조기 성적

Our professional services was launched having a hope to serve as a total on the internet electronic catalogue that gives usage of many PDF file guide assortment. You will probably find many different types of e-guide as well as other literatures from our paperwork database. Distinct preferred topics that spread on our catalog are trending books, solution key, assessment test questions and answer, guideline sample, exercise guideline, test test, customer guide, user guide, assistance instruction, repair guidebook, etc.

Qualitative research for education: An introduction to theories and methods

Boolean satisfiability is probably the most studied of the combinatorial optimization/search problems. Significant effort has been devoted to trying to provide practical solutions to this problem for problem instances encountered in a range of applications in electronic design automation (EDA), as well as in artificial intelligence (AI). This study has culminated in the development of several SAT packages, both proprietary and in the public domain (e.g. GRASP, SATO) which find significant use in both research and industry. Most existing complete solvers are variants of the Davis-Putnam (DP) search algorithm. In this paper we describe the development of a new complete solver, Chaff which achieves significant performance gains through careful engineering of all aspects of the search-especially a particularly efficient implementation of Boolean constraint propagation (BCP) and a novel low overhead decision strategy. Chaff has been able to obtain one to two orders of magnitude performance improvement on difficult SAT benchmarks in comparison with other solvers (DP or otherwise), including GRASP and SATO.

/pdf/chaff-engineering-an-efficient-sat-solver-2ima1ekzuu.pdf

Chaff: engineering an efficient SAT solver

Sexual Behavior in the Human Male

A general logic program (abbreviated to "program" hereafter) is a set of roles that have both positive and negative subgoals. It is common to view a deductive database as a general logic program consisting of rules (IDB) slttmg above elementary relations (EDB, facts). It is desirable to associate one Herbrand model with a program and think of that model as the "meaning of the program, " or Its "declarative semantics. " Ideally, queries directed to the program would be answered in accordance with this model. Recent research indicates that some programs do not have a "satisfactory" total model; for such programs, the question of an appropriate partial model arises. Unfounded sets and well-founded partial models are introduced and the well-founded semantics of a program are defined to be its well-founded partial model. If the well-founded partial model is m fact a total model. it is called the well-founded model. It n shown that the class of programs possessing a total well-founded model properly includes previously studied classes of "stratified" and "locally stratified" programs, The method in this paper is also compared with other proposals in the literature, including Clark's "program completion, " Fitting's and Kunen's 3-vahred interpretations of it, and the "stable models" of Gelfond and Lifschitz.

/pdf/the-well-founded-semantics-for-general-logic-programs-1i37dmxhij.pdf

The well-founded semantics for general logic programs

For applications such as deductive databases employing the Open World Assumption, failed derivations have a lesser importance. In this case, use of the identical equivalences based upon the functional semantics [P] and the logical consequences of P allows the application of two different and powerful tools to reason about programs. In particular, these equivalences seem ideal for discussing the deductive structure of such deductive databases, independent of any particular state of the database of facts.

Equivalences of logic programs

Previous research indicated that Catholic high schools in the United States were not addressing the topic of homosexuality in any significant and systematic way prior to the mid-1990s, though practitioners in Catholic high schools have begun to address the topic in recent years. This study, in sampling seven Catholic schools in the greater Chicago area, investigated how educators in Catholic high schools were addressing the topic of homosexuality and what barriers they encountered in efforts at implementation. It was found that their reasons for addressing the issue included two very recent developments: educators being better trained in gay and lesbian youth issues, and students “coming out” in their schools. Catholic identity has served both as a cause for and a barrier to addressing gay and lesbian issues in the schools. Two other barriers seem to be closely related: lack of support from school administration, which is strongly influenced by fear of community reaction.

What Educators in Catholic Schools Might Expect When Addressing Gay and Lesbian Issues: A Study of Needs and Barriers

The filtering method considered in this paper is based on approximation of a spatial object in d-dimensional space by the minimal convex polyhedron that encloses the object and whose facets are normal to preselected axes. These axes are not necessarily the standard coordinate axes; furthermore, their number is not determined by the dimension of the space. We optimize filtering by selecting optimal such axes based on a preprocessing analysis of stored objects or a sample thereof. The number of axes selected represents a trade-off between access time and storage overhead, as more axes usually lead to better filtering but require more overhead to store the associated access structures. We address the problem of minimizing the number of axes required to achieve a predefined quality of filtering and the reverse problem of optimizing the quality of filtering when the number of axes is fixed. In both cases we also show how to find an optimal collection of axes. To solve these problems, we introduce and study the key notion of separability classification, which is a general tool potentially useful in many applications of a computational geometry flavor. The approach is best suited to applications in which the spatial data is relatively static, some directions are more dominant than others, and the dimension of the space is not high; maps are a prime example.

Separability of polyhedra for optimal filtering of spatial and constraint data

The simplicity and elegance of definite clauses makes this formalism attractive from a theoretical point of view. The objects in this formalism are the uninterpreted terms over the Herbrand universe. Programming however is not done exclusively in the Herbrand universe, but uses higher level concepts such as arithmetic. In that sense we can view definite clauses as the Turing machines of Logic Programming. This gap between theory and programming practice can be reduced by introducing user-oriented domains into the formalism. We have seen that this can be achieved without losing the important properties of definite clauses.

Invited Talk: Some Issues and Trends in the Semantics of Logic Programming

We give an informal review of the problem of eliminating negation in term algebras and its applications. The initial results appear to be very specialized with complex combinatorial proofs. Nevertheless they have applications and relevance to a number of important areas: unification, learning, abstract data types and rewriting systems, constraints and constructive negation in logic languages.

Michael J. Maher

Papers

Equivalences of logic programs

What Educators in Catholic Schools Might Expect When Addressing Gay and Lesbian Issues: A Study of Needs and Barriers

Separability of polyhedra for optimal filtering of spatial and constraint data

Invited Talk: Some Issues and Trends in the Semantics of Logic Programming

Elimination of negation in term algebras