High-Alpha Research Vehicle (HARV) longitudinal controller: Design, analyses, and simulation resultss

This paper describes the design, analysis, and nonlinear simulation results (batch and piloted) for a longitudinal controller which is scheduled to be flight-tested on the High-Alpha Research Vehicle (HARV). The HARV is an F-18 airplane modified for and equipped with multi-axis thrust vectoring. The paper includes a description of the facilities, a detailed review of the feedback controller design, linear analysis results of the feedback controller, a description of the feed-forward controller design, nonlinear batch simulation results, and piloted simulation results. Batch simulation results include maximum pitch stick agility responses, angle of attack alpha captures, and alpha regulation for full lateral stick rolls at several alpha's. Piloted simulation results include task descriptions for several types of maneuvers, task guidelines, the corresponding Cooper-Harper ratings from three test pilots, and some pilot comments. The ratings show that desirable criteria are achieved for almost all of the piloted simulation tasks

Market Power and Collusion on Interconnection Phone Market in Tunisia : What Lessons from International Experiences

We try in this paper to characterize the state of mobile phone market in Tunisia. Our study is based on a survey of foreign experience (Europe) in detecting collusive behavior and a comparison of the critical threshold of collusion between operators in developing countries like Tunisia. The market power is estimated based on the work of Parker Roller (1997) and the assumption of "Balanced Calling Pattern". We use then the model of Friedman (1971) to compare the critical threshold of collusion. We show that the "conduct parameter" measuring the intensity of competition is not null during the period 1993-2011. Results show also that collusion is easier on the Tunisian market that on the Algerian, Jordanian, or Moroccan one

Hope Matters: The Power of Social Work

Julie Berrett-Abebe (with Mary Susan Convery) is a contributing author, The Power of Presence: Finding Hope in an Oncology Group Setting, Chapter 11. When looking for a change or a solution to a problem, we turn to these manifestations of hope, both as individuals and on a societal level.The capacity to hope for change enables social workers to serve people who have experienced torture, trauma, drug addiction, domestic violence, or child abuse. The challenges facing clients are multilayered and complex, and require a sensitive, informed approach.Hope Matters: The Power of Social Work can inspire hope in each one of us, no matter our personal and professional challenges. The editors explore the stories of professional social workers in all fields of practice as they promote the clinical and community uses of hope to inspire their clients and help them solve seemingly intractable problems. The contributors to this collection highlight the role of resilience in making progress toward overcoming obstacles and reaching a positive outcome. Hope Matters is filled with uplifting examples of the power and importance of social work.Hope Matters: The Power of Social Work is a companion to the recently published Social Work Matters: The Power of Linking Policy and Practice, which has demonstrated social work\u27s central role in working toward achieving healthy functioning in society.https://digitalcommons.fairfield.edu/education-books/1067/thumbnail.jp