Series of broad resonances in atomic three-body systems

We re-examine the series of resonances found earlier in atomic three-body systems by solving the Faddeev-Merkuriev integral equations. These resonances are rather broad and line-up at each threshold with gradually increasing gaps, the same way for all thresholds and irrespective of the spatial symmetry. We relate these resonances to the Gailitis mechanism, which is a consequence of the polarization potential.Comment: 14 pages, 7 figures. arXiv admin note: text overlap with arXiv:0810.303

Teacher perception of the instructional evaluation process : an exploratory study.

This study is motivated by the fact that pedagogy has become a major political issue in this decade. State and Federal Governments, Boards of Education, School Systems, and Educators at all levels are trying to come up with strategies to put education on the right track and to recapture the interest of young people. Financial problems, drugs, lack of interest from parents and students, and poorly motivated personnel, may be some of the factors affecting the teaching process in school environment resulting in the lowering of the quality of instruction. Among the factors that might be affecting the teaching process in the schools are poorly motivated instructional personnel, who play so important a role in creating a successful school environment. If a teacher is not well motivated, student achievement will be negatively affected and the schools can still fail. Even if one works in a new building with modern facilities, with the best instructional materials, selected students, flexible schedules, is fairly well paid, and has competent colleagues, there are no guarantees of success if teacher motivation is low. If a supervisor detects that the staff is not well motivated for whatever reason, a solution must be found. Through this study, I reviewed various styles of supervision that instructional supervisors can use as models for assessing classroom teachers. The study focused on five of the most common models used in different school districts within the state. (1) Cooperative Supervision; (2) Self-directed Supervision; (3) Clinical Supervision; (4) Oriented Monitoring; (5) Differentiated Supervision. The study was conducted among teachers in a Western Massachusetts Public School System. A questionnaire was administered to collect the data. The collected data answered the following questions: (1) Is the teacher evaluation process contributing to the teaching-learning process in the classroom? (2) Are supervisors providing information about the options that teachers have to be evaluated? A theoretical model based on Clinical Supervision and Administrative Monitoring was prepared by the researcher as an instrument that supervisors can use to evaluate teacher effectiveness

PTFI Big Gossan Mine - Ventilation Design to Support the New Stope Sequence Strategy

Big Gossan (BG) mine is an open stope mine operated by PT Freeport Indonesia(PTFI). This mine started its development in 2006. Currently, the mine consists of 9 active levels, each level is designed with about 1 km footwall drift East-West. The production initiated in 2009, but the mine was temporarily shut down due to a company decision. Lately the mine has been re-activated since 2017 and will be pushed into its peak production in 2019, with 7000 tpd production rate. In order to meet with the production goal, 5 levels consisting of 34 at least production stopes are required on a yearly basis. The other strategy to meet the production goal is an improvement of stopes sequencing. Big Gossan Mine is ventilated by two parallel 1600kW exhaust Mixed-Flow fans.This paper presents the ventilation plan and design to support the improved stope sequence until peak production, include the analysis of ventilation design criteria, ventilation network modeling, infrastructure required, possibility of main fans upgrade and other ventilation open stope mine challenges

Social Marketing in Action

This book was written for those interested in creating social change for the greater good. In this book, we provide a wide selection of social marketing cases from which we can learn and teach. The book is intended for both academic and practitioner use. Part I of this book offers a brief yet comprehensive review of social marketing. This provides the reader with the background in social change and marketing necessary to read and analyze the subsequent cases. Parts II, III, IV, and V of this book offer a total of 24 social marketing cases, from a variety of countries, addressing many different issues. For classroom use, this book is written to serve as a stand-alone tool, with Part I providing a concise introduction to social marketing principles and theory. Chapter appendices provide links to further readings on social marketing principles for those wishing to delve deeper. If still further detail on social marketing principles and theory are desired, this book can easily be paired with another social marketing textbook as well. We have aimed the book to be accessible to undergraduate students but also offer sufficient material to challenge students at the graduate level. Advanced students should be encouraged to further explore the references and links provided, to critique the case approaches, and to offer alternative strategies for the cases provided. A separate teaching guide collection is available for the book as well. This collection contains answers to the discussion questions in the cases, as well as suggested activities for inside and outside of the classroom. Additionally, the teaching guides for many cases offer suggestions for further reading and other helpful resources. For practitioner use, Part I offers a refresher on basic social marketing principles. In addition, a variety of references are offered, allowing for further personal study. Parts II through V offer detailed information about a wide variety of actual social marketing programs. You can compare and contrast these cases with your own situation, hopefully gaining insights that will be helpful in your own social marketing efforts

Non-conventional digital signatures and their implementations – A review

The final publication is available at Springer via http://dx.doi.org/10.1007/978-3-319-19713-5_36The current technological scenario determines a profileration of trust domains, which are usually defined by validating the digital identity linked to each user. This validation entails critical assumptions about the way users’ privacy is handled, and this calls for new methods to construct and treat digital identities. Considering cryptography, identity management has been constructed and managed through conventional digital signatures. Nowadays, new types of digital signatures are required, and this transition should be guided by rigorous evaluation of the theoretical basis, but also by the selection of properly verified software means. This latter point is the core of this paper. We analyse the main non-conventional digital signatures that could endorse an adequate tradeoff betweeen security and privacy. This discussion is focused on practical software solutions that are already implemented and available online. The goal is to help security system designers to discern identity management functionalities through standard cryptographic software libraries.This work was supported by Comunidad de Madrid (Spain) under the project S2013/ICE-3095-CM (CIBERDINE) and the Spanish Government project TIN2010-19607

Extreme Galactic-Winds and Starburst in IR Mergers and IR QSOs

We report -as a part of a long-term study of mergers and IR QSOs- detailed spectroscopic evidences for outflow (OF) and/or Wolf Rayet features in: (i) low velocity OF in the ongoing mergers NGC 4038/39 and IRAS 23128-5919; (ii) extreme velocity OF (EVOF) in the QSOs IRAS 01003-2238 and IRAS 13218+0552; (iii) OF and EVOF in a complete sample of ultra-luminous IR galaxies/QSOs ("The IRAS 1 Jy MKO-KPNO Survey", of 118 objects). We found EVOF in IRAS 11119+3257, 14394+5332, 15130+1958 and 15462-0450. The OF components detected in these objects were mainly associated to starburst processes: i.e., to galactic-winds generated in multiple type II SN explosions and massive stars. The EVOF were detected in objects with strong starburst plus obscured IR QSOs; which suggest that interaction of both processes could generate EVOF. In addition, we analyze the presence of Wolf Rayet features in the large sample of Bright PG-QSOs (Boroson and Green 1992), and nearby mergers and galactic-wind galaxies. We found clear WR features in the Fe II QSOs (type I): PG 1244+026, 1444+407, 1448+273, 1535+547; and in the IR merger Arp 220. HST archive images of IR+BAL QSOs show in practically all of these objects "arc or shell" features probably associated to galactic-winds (i.e., to multiple type II SN explosions) and/or merger processes. Finally, we discuss the presence of extreme starburst and galactic wind as a possible evolutive link between IR merger and IR QSOs; where the relation between mergers and extreme starburst (with powerful galactic-winds) plays in important role, in the evolution of galaxies.Comment: 14 pages, 6 figure

The critical current of YBa2Cu3O7-d Low Angle Grain Boundaries

Transport critical current measurements have been performed on 5 degree [001]-tilt thin film YBa2Cu3O7-delta single grain boundaries with magnetic field rotated in the plane of the film, phi. The variation of the critical current has been determined as a function of the angle between the magnetic field and the grain boundary plane. In applied fields above 1 T the critical current, j_c, is found to be strongly suppressed only when the magnetic field is within an angle phi_k of the grain boundary. Outside this angular range the behavior of the artificial grain boundary is dominated by the critical current of the grains. We show that the phi dependence of j_c in the suppressed region is well described by a flux cutting model.Comment: To be published in PRL, new version with minor changes following referees report

Top-quark FCNC Productions at LHC in Topcolor-assisted Technicolor Model

We evaluate the top-quark FCNC productions induced by the topcolor assisted technicolor (TC2) model at the LHC. These productions proceed respectively through the parton-level processes g g -> t c_bar, c g->t, c g -> t g, c g -> t Z and c g -> t \gamma. We show the dependence of the production rates on the relevant TC2 parameters and compare the results with the predictions in the minimal supersymmetric model. We find that for each channel the TC2 model predicts a much larger production rate than the supersymmetric model. All these rare productions in the TC2 model can be enhanced above the 3-sigma sensitivity of the LHC. Since in the minimal supersymmetric model only c g -> t is slightly larger than the corresponding LHC sensitivity, the observation of these processes will favor the TC2 model over the supersymmetric model. In case of unobservation, the LHC can set meaningful constraints on the TC2 parameters.Comment: 5 pages, 4 fig