Lincoln\u27s Legacy of Leadership

Through this in-depth look at Abraham Lincoln, both before and during his presidency, we can learn through his leadership in times of confusion, war, and dissent. The set of chapters included in this volume are based on papers that constituted part of the 2008-2009 Jepson Leadership Forum at the Jepson School of Leadership Studies at the University of Richmond. The chapters consider Lincoln’s intellectual, moral, political, and military leadership. The authors include the world’s foremost Lincoln scholars, including Pulitzer Prize winner Daniel Walker Howe, and Lincoln Prize winners Richard Carwardine and Douglas Wilson.https://scholarship.richmond.edu/bookshelf/1007/thumbnail.jp

Leader-Member Exchange (LMX) Theory

Leader-member exchange (LMX) theory is rooted in the idea that leaders and followers exchange benefits, and that their relationships are at the heart of the leadership process. Social scientists have long attempted to understand how people relate to each other, beginning with explorations of costs and rewards, interpersonal behavior, and human relationship. A number of theories have used the lens of interpersonal relationships to understand leadership, including Edwin Hollander\u27s focus on idiosyncrasy credits, Tom Tuyler\u27s notion of procedural justice, Dave Messick\u27s delineation of psychological exchanges, and James MacGregor Burns\u27s conceptualization of transforming and transactional leadership. Most notably, George Graen and his colleagues constructed the formal leader-member exchange theory, which began by elaborating on the nature of the leader-follower relationship and its outcomes, and later created a model for effective leadership. This entry traces the background of these ideas and discusses the Graen theory in some detail

What Makes Leadership Necessary, Possible and Effective: The Psychological Dimensions

In this chapter we explore leadership from a psychological perspective. We consider the three questions raised by the examples discussed above. What about the human condition makes leadership necessary, what makes leadership possible, and what makes leadership effective? Considering leadership from these vantage points will allow us to organize a wealth of psychological knowledge about leading and following, and about doing them both well or not well

[Introduction to] Women and Leadership: History, Theories, and Case Studies

The compact Women and Leadership: History, Theories, and Case Studies, provides valuable research by experts on leadership and women\u27s history to help students and citizens who want a more nuanced explanation of what we know about women as leaders and about how they have led in different fields, in different parts of the world, and in past centuries.https://scholarship.richmond.edu/bookshelf/1281/thumbnail.jp

Wealth inequality and activism: Perceiving injustice galvanizes social change but perceptions depend on political ideologies

What motivates people to engage in activism against wealth inequality? The simple answer is, perceiving injustice. However, the current work demonstrates that these perceptions depend on political ideologies. More specifically, for political liberals who frequently question the fairness of the economic system, messages simply describing the extent of the inequality (distributive injustice) are enough to motivate activism (Study 1). For political conservatives, who are inclined to believe that inequality results from fair procedures, messages must also detail how the system of economic forces is unjust (procedural injustice; Studies 2 and 3). Together, these studies suggest perceiving injustice can galvanize social change, but for conservatives, this means more than simply outlining the extent of the inequality

Implications of taxonomic modifications and alien species on biological water quality assessment as exemplified by the Belgian Biotic Index method

BRIEF OF APPELLEE THIS IS AN APPEAL FROM THE FINAL JUDGMENT OF THE THIRD JUDICIAL DISTRICT COURT, SALT LAKE COUNTY, STATE OF UTAH AFFIRMING THE ORDER OF SUSPENSION OF THE DRIVER\u27S LICENSE SERVICES, RENDERED IN AN ADMINISTRATIVE ADJUDICATION HEARING, THE HONORABLE RAYMOND S. UNO, JUDGE PRESIDING

Redundancy, Deduction Schemes, and Minimum-Size Bases for Association Rules

Association rules are among the most widely employed data analysis methods in the field of Data Mining. An association rule is a form of partial implication between two sets of binary variables. In the most common approach, association rules are parameterized by a lower bound on their confidence, which is the empirical conditional probability of their consequent given the antecedent, and/or by some other parameter bounds such as "support" or deviation from independence. We study here notions of redundancy among association rules from a fundamental perspective. We see each transaction in a dataset as an interpretation (or model) in the propositional logic sense, and consider existing notions of redundancy, that is, of logical entailment, among association rules, of the form "any dataset in which this first rule holds must obey also that second rule, therefore the second is redundant". We discuss several existing alternative definitions of redundancy between association rules and provide new characterizations and relationships among them. We show that the main alternatives we discuss correspond actually to just two variants, which differ in the treatment of full-confidence implications. For each of these two notions of redundancy, we provide a sound and complete deduction calculus, and we show how to construct complete bases (that is, axiomatizations) of absolutely minimum size in terms of the number of rules. We explore finally an approach to redundancy with respect to several association rules, and fully characterize its simplest case of two partial premises.Comment: LMCS accepted pape

Advanced EFL learners' beliefs about language learning and teaching: a comparison between grammar, pronunciation, and vocabulary

This paper reports on the results of a study exploring learners’ beliefs on the learning and teaching of English grammar, pronunciation and vocabulary at tertiary level. While the importance of learners’ beliefs on the acquisition process is generally recognized, few studies have focussed on and compared learners’ views on different components of the language system. A questionnaire containing semantic scale and Likert scale items probing learners’ views on grammar, pronunciation and vocabulary was designed and completed by 117 native speakers of Dutch in Flanders, who were studying English at university. The analysis of the responses revealed that (i) vocabulary was considered to be different from grammar and pronunciation, both in the extent to which an incorrect use could lead to communication breakdown and with respect to the learners’ language learning strategies, (ii) learners believed in the feasibility of achieving a native-like proficiency in all three components, and (iii) in-class grammar, pronunciation and vocabulary exercises were considered to be useful, even at tertiary level. The results are discussed in light of pedagogical approaches to language teaching

Beyond Hypergraph Dualization

International audienceThis problem concerns hypergraph dualization and generalization to poset dualization. A hypergraph H = (V, E) consists of a finite collection E of sets over a finite set V , i.e. E ⊆ P(V) (the powerset of V). The elements of E are called hyperedges, or simply edges. A hypergraph is said simple if none of its edges is contained within another. A transversal (or hitting set) of H is a set T ⊆ V that intersects every edge of E. A transversal is minimal if it does not contain any other transversal as a subset. The set of all minimal transversal of H is denoted by T r(H). The hypergraph (V, T r(H)) is called the transversal hypergraph of H. Given a simple hypergraph H, the hypergraph dualization problem (Trans-Enum for short) concerns the enumeration without repetitions of T r(H). The Trans-Enum problem can also be formulated as a dualization problem in posets. Let (P, ≤) be a poset (i.e. ≤ is a reflexive, antisymmetric, and transitive relation on the set P). For A ⊆ P , ↓ A (resp. ↑ A) is the downward (resp. upward) closure of A under the relation ≤ (i.e. ↓ A is an ideal and ↑ A a filter of (P, ≤)). Two antichains (B + , B −) of P are said to be dual if ↓ B + ∪ ↑ B − = P and ↓ B + ∩ ↑ B − = ∅. Given an implicit description of a poset P and an antichain B + (resp. B −) of P , the poset dualization problem (Dual-Enum for short) enumerates the set B − (resp. B +), denoted by Dual(B +) = B − (resp. Dual(B −) = B +). Notice that the function dual is self-dual or idempotent, i.e. Dual(Dual(B)) = B