75 research outputs found
Single- and Multi-carrier Quadrature Amplitude Modulation: Principles and Applications for Personal Communications, WATM and Broadcasting: 2nd
No full textSingle- and Multi-carrier Quadrature Amplitude Modulation Principles and Applications for Personal Communications, WLANs and Broadcasting L. Hanzo Department of Electronics and Computer Science, University of Southampton, UK W. Webb Motorola, Arlington Heights, USA formerly at Multiple Access Communications Ltd, Southampton, UK T. Keller Ubinetics, Cambridge Technology Centre, Melbourn, UK formerly at Department of Electronics and Computer Science, University of Southampton, UK Motivated by the rapid evolution of wireless communication systems, this expanded second edition provides an overview of most major single- and multi-carrier Quadrature Amplitude Modulation (QAM) techniques commencing with simple QAM schemes for the uninitiated through to complex, rapidly-evolving areas, such as arrangements for wide-band mobile channels. Targeted at the more advanced reader, the multi-carrier modulation based second half of the book presents a research-orientated outlook using a variety of novel QAM-based arrangements. * Features six new chapters dealing with the complexities of multi-carrier modulation which has found applications ranging from Wireless Local Area Networks (WLAN) to Digital Video Broadcasting (DVB) * Provides a rudimentary introduction for readers requiring a background in the field of modulation and radio wave propagation * Discusses classic QAM transmission issues relevant to Gaussian channels * Examines QAM-based transmissions over mobile radio channels * Incorporates QAM-related orthogonal techniques, considers the spectral efficiency of QAM in cellular frequency re-use structures and presents a QAM-based speech communications system design study * Introduces Orthogonal Frequency Division Multiplexing (OFDM) over both Gaussian and wideband fading channels By providing an all-encompassing self-contained treatment of single- and multi- carrier QAM based communications, a wide range of readers including senior undergraduate and postgraduate students, practising engineers and researchers alike will all find the coverage of this book attractive
Curriculum Adaptations to Teach for Creativity Using a Published Language Arts Curriculum
No full textThe purpose of this qualitative action research study was to examine a published language arts curriculum, determine how Anna Craft’s possibility thinking framework could be integrated into the curriculum, and then observe how students responded to the implementation of lessons integrating the elements of possibility thinking. The findings revealed that a teacher can use the possibility thinking elements to encourage creativity while still teaching the objectives of a published curriculum. Creativity development can be encouraged by using a variety of supports that build possibility thinking. The data demonstrated a connection between life experiences and the curriculum through possibility thinking. The data also indicated that visual bridges in connection with writing can encourage the imagination. Flexible story structure and independent learning featured narrative as a tool to encourage the possibility thinking elements through dance, creating stories, and puppet plays. In addition, problem-solving played a key role when connected with narrative and collaboration to support the encouragement of creativity through the possibility thinking elements. Where students were engaged in collaboration, narrative, and problem-solving activities in connection with literacy instruction, it led to an increase in possibility thinking amongst students
Arts Education in an Urban School District: Principals' Perspectives and Practices in a Standards-Based Environment Coupled with an Economic Downturn
No full textThis case study explored perspectives of urban principals towards the values of arts education within the context of accountability coupled with economic strain, which has worked to undervalue arts education, and has impacted urban students' access to quality arts education (Chapman, 2004 & 2005). Since differences in access to arts education has been drawn along differences in ethnic, racial and socioeconomic status, this was understood as a social justice issue (Theoharis, 2007). Specifically, this research addressed the roles of principals and investigated the research question: How do urban principals and school leaders perceive the value of the arts within a climate of accountability and financial strain? Informed by critical theory, this question was supplemented by the following attendant questions: 1a.) How do urban school leaders make decisions about offering arts education at their schools? 1b.) What do urban school leaders consider when they make these decisions? 2a.) How are urban school leaders maintaining access to arts education within a climate of accountability and financial strain? 2b.) To what extent are urban school leaders who are maintaining this access aware of the relationships between arts education and social justice? Qualitative sources of data were collected including transcripts, observation notes and analytical memos. Participants included six urban, high school principals and additional staff members from three of the high schools. Findings revealed that principals believed that students who participated in arts education were engaged, were able to enjoy and escape from the rest of the school day, and finally, were able to express themselves. Principals who valued arts education were able to maintain access to arts education on limited levels. Their decisions were largely guided by evaluation requirements, available resources and tradition. Principals supported the accountability movement and felt their schools were improving; however, principals also revealed that providing quality arts education remained a major challenge and indicated a need for more to be done. Although principals expressed a concern with social justice issues, most did not indicate an awareness of arts education curricula as a means to engage students in critical thinking or social activism that could challenge the status quo
Looking for complication: The case of management education
No full textThis paper argues that in face of the changes occurring in the organizational world, management education should consider the need to rethink some of its premises and adapt to the new times. The need to complicate management learning due to increased complication in competitive landscapes, is analyzed. Four possibilities of addressing organizational topics in a complicated way are contrasted: the vertical, horizontal, hypertextual, and dialectical approaches. The promises of the dialectical approach are particularly stressed as a more demanding and potentially enriching path for the creation of knowledge about organizations. The test of the four approaches in a group of undergraduate students provides some preliminary data for analyzing the strenghts and weaknesses of our proposal.
Peripatetic electronic teachers in higher education
No full textThis paper explores the idea of information and communications technology providing a medium enabling higher education teachers to act as freelance agents. The notion of a ‘Peripatetic Electronic Teacher’ (PET) is introduced to encapsulate this idea. PETs would exist as multiple telepresences (pedagogical, professional, managerial and commercial) in PET‐worlds; global networked environments which support advanced multimedia features. The central defining rationale of a pedagogical presence is described in detail and some implications for the adoption of the PET‐world paradigm are discussed. The ideas described in this paper were developed by the author during a recently completed Short‐Term British Telecom Research Fellowship, based at the BT Adastral Park
Types of Bias-Based Bullying and School Climate Perceptions, Attendance, and Grades
No full textBias-based bullying relating to disability, sexual orientation, and gender identity has extremely detrimental effects on the victim’s school climate perceptions, attendance records, and academic achievement. This study used a cross-sectional research design to compare the self-reported school climate perceptions, attendance habits, and grades of student victims of disability-based bias-related bullying and sexual orientation- and gender identity-based bias-related bullying using secondary data from the California Healthy Kids Survey. Participants (N = 713,107) filled out the California Healthy Kids Survey self-report surveys in the years 2017, 2018, and 2019. Regression analyses and a two-sample t-test were used to analyze and compare the relationships between gender identity- and sexual orientation-based bullying versus disability-based bullying and self-reported student grades, attendance rates, reasons for absences, and school climate perceptions. When compared to students who experience gender-identity- or sexual orientation-based bullying, students who experienced disability-based bullying had significantly more negative perceptions of their schools’ climates. Victims of disability-based bullying also reported more absences, more truancies, and lower grades than victims of gender-identity- and sexual orientation-based bullying. When compared to students who reported experiencing disability-based bullying, students who reported experiencing sexual orientation- and gender-identity-based bullying more frequently reported missing school due to mental or physical illness, bullying or mistreatment in school, feeling unsafe traveling to and from school, and feeling negative emotions such as sadness, hopelessness, anxiety, stress, or anger. The findings were used to determine where certain interventions for victims of sexual orientation- and gender identity-based versus disability-based bias-related bullying are needed
52475, 1894-04-14, COSIER (William) † ; FULLER (George Arthur), The Rookery, Dorking † ; « A Gentleman » [= PEEVOR (Geo. T.)] ; et a.
No full textA MICROPROCESSOR-CONTROLLED CONTINUOUS-FLOW CRYOSTAT FOR SINGLE-CRYSTAL X-RAY-DIFFRACTION IN THE RANGE 10-300 K
No full text- …
