2,482 research outputs found

    Education for Peace and Justice

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    This article explores theoretical and practical issues related to education for peace and justice. It briefly presents educational theories of Plato, Aristotle, John Dewey, and Paulo Freire, recent papal and conciliar teachings, and the work of prominent religious educators. The power of education for aiding in justice and peace education is shown through guiding principles, curricular and methodological arrangements, ways of handling controversial issues, and the effective use of the arts

    Educators in the Catholic Intellectual Tradition

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    This book contains a collection of studies of prominent educators who have made significant contributions to handing on the Catholic intellectual tradition in the United States. These men and women have enriched this tradition by careful attention to educational theories and methods that find their origin in the Jewish and Christian past. Ancient Israel was assiduous in handing on the Torah or Law, the prophets dramatically called people back to the practices of the covenant, and the sages gave practical advice for everyday living. The Acts of the Apostles and the Letters of Paul chronicle the careful attention to safeguarding and transmitting the teachings in the early apostolic Christian communities. Contributors to this tradition in the past three centuries have been mainly European scholars. However, in the past two centuries educators in the United States have made notable contributions to the task of handing on the Catholic intellectual tradition. Table of contents: John Lancaster Spalding: prelate and philosopher of Catholic education / Lucinda A. Nolan -- Edward Pace: pioneer psychologist, philosopher, and religious educator / John L. Elias -- Thomas E. Shields: progressive Catholic religious educator / John L. Elias -- George Johnson: policy maker for Catholic education / John L. Elias -- Virgil Michel: prophet of liturgical education and reform / Jacqueline Parascandola -- Sister M. Rosalia Walsh and the parish catechetical apostolate / Lucinda A. Nolan -- Jacques Maritain and his contribution to the philosophy of Catholic education in America / Luz M. Ibarra -- Neil G. McCluskey: a public voice for Catholic education / Harold D. Horell -- Mary Perkins Ryan: visionary in modern Catholic religious education / Ann M. Heekin -- Shaping the Christian century: the vision of Gerald Sloyan / Philip A. Franco.https://digitalcommons.sacredheart.edu/shupress_bks/1023/thumbnail.jp

    Challenges in Clock Synchronization for On-Site Coding Digital Beamformer

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    Typical radio frequency (RF) digital beamformers can be highly complex. In addition to a suitable antenna array, they require numerous receiver chains, demodulators, data converter arrays, and digital signal processors. To recover and reconstruct the received signal, synchronization is required since the analog-to-digital converters (ADCs), digital-to-analog converters (DACs), field programmable gate arrays (FPGAS), and local oscillators are all clocked at different frequencies. In this article, we present a clock synchronization topology for a multichannel on-site coding receiver (OSCR) using the FPGA as a master clock to drive all RF blocks. This approach reduces synchronization errors by a factor of 8, when compared to conventional digital beamformer

    Cross-Mixing Hybrid Beamformer for Wideband Apertures

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    Existing beamforming arrays suffer from the size and cost of the RF front-end and digital back-end components. In this paper, a novel hybrid beamforming configuration for wideband receivers is introduced. The design replaces phase shifters and local oscillators (LO) with cross mixing antenna elements to maximize diversity gain. In this paper, an analytical model of the cross mixing beamformer (CMB) is first presented. Simulations are carried out showing that a maximum diversity gain can be achieved with the CMB approach. Two prototypes were implemented using 2×12\times 1 and 4×24\times 2 element arrays and tested at 2.31 GHz. Measured results show that CMB achieves coherent signal combining and can preserve the phase delay information needed for hybrid beamforming setups

    Semi-Resistive Approach for Tightly Coupled Dipole Array Bandwidth Enhancement

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    A new approach to enhance the bandwidth of Tightly Coupled Dipole Arrays (TCDA) is presented. The new design achieves the integration of a semi-resistive Frequency Selective Surface network (FSS) composed of a non-resistive low-pass FSS and two resistive band-stop FSSs. The integration of this FSS network within a dual-polarized Tightly Coupled Dipole Array (TCDA) led to an increased impedance bandwidth of 28:1 from 0.20GHz to 5.6GHz. Notably, the use of an FSS superstrate allowed for scanning down to 60° at VSWR \u3c 3 in the E-plane and VSWR \u3c 4 in the D- and H-planes. Additionally, the strategic use of the inserted low-pass FSS reduces the resistive effects above 2.5GHz for improved average efficiency. A array prototype was fabricated and tested to verify the bandwidth and gain of a finite array. The simulated radiation efficiency was demonstrated to be 83%, on average, across the band

    Algunos aspectos de las relaciones entre establecidos y marginados: el modelo Maycomb

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    Este ensayo de sociología de los procesos sociales contemporáneos fue publicado originalmente en 1990 y recogido por Cas Wouters en el cuarto volumen de la compilación de trabajos de Norbert Elias que editó en la imprenta de University College Dublin. Se trata de un corolario de la “investigación sociológica sobre los problemas de la vida en comunidad” que, bajo el título de Establecidos y marginados, fue publicada originalmente en 1965 por la editorial londinense de Frank Cass & Co. Una traducción española de este libro apareció durante el año 2016 en el Fondo de Cultura Económica. Por su valor metodológico para la comprensión de una de las características repetitivas de las sociedades humanas se ofrece este ensayo a los lectores de la Revista de Santander en su primera traducción castellana, debida a Marina González de Cala y Amelia Acebedo Silva.&nbsp

    Europe’s perennial "outsiders": a processual approach to Roma stigmatization and ghettoization

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    This paper draws on the theoretical work of Norbert Elias and Loïc Wacquant in seeking to understand the stigmatized and marginalized position of the Roma population within Europe. The paper argues that the persistent persecution of Roma, reflected in social policy, cannot be understood without reference to long-term social processes, which shape the nature of the asymmetric power relations between Roma and non-Roma. Elias's theory of established-outsider relations is applied at the intra-state European level in arguing that Roma constitute a cross-border "outsider" group; with their intense stigmatization explained and perpetuated by a common set of collective fantasies which are maintained through complex group processes of disidentification, and which result in Roma being seen as of lesser human worth. Wacquant's theoretical concept of the "ghetto" is then drawn upon to show how the manifestations of stigmatization for the stigmatized are at once psychological, social and spatial. The paper suggests that the synthesis of the two theorists' relational, theoretical concepts allows for an approach that can expose the way in which power is exercised within and through group relations. Such an approach emphasizes the centrality of the interdependence between Roma and non-Roma, and the fluctuating power balance that characterises that relationship across time and space. The paper concludes that, while existing research focused on policy and outcomes is useful in understanding the negative contemporary experiences of Roma populations, they need to be understood in the context of wider social processes and historical continuities in seeking to elucidate how these processes shape policies and contribute to social and spatial marginalization

    The Role of Slow Slip Events in the Cascadia Subduction Zone Earthquake Cycle

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    Slow slip events (SSEs) detected on the Cascadia Subduction Zone interface at 30–50 km depth imply a release of accumulated strain. However, studies of interseismic deformation in Cascadia typically find coupling on the upper 30 km of the interface, which is generally accepted as defining the seismogenic zone. Estimates of coupling using net interseismic velocities (including SSE effects) and restricting coupling to the shallow interface may underestimate slip deficit accumulation at depths \u3e30 km. Here, we detect reversals in GPS motion as indications of SSEs, then use SSE displacements to estimate cumulative slow slip from 2007 to 2021. We calculate pure interseismic velocities, correcting for SSE displacements, and use them to constrain an elastic block model, estimating slip deficit on the subduction interface down to 50 km. By evaluating slip deficit and slow slip independently, we examine SSEs’ effect on interseismic strain accumulation, and the effect of inter-SSE slip deficit and slow slip on vertical deformation of the forearc. We find that moderate to high coupling extends to 40 km depth, and while shallow coupling is consistent with previous estimates of the seismogenic zone, a deeper region of slip deficit beneath the Olympic Peninsula may be partially (61%) relieved aseismically by SSEs. Patterns of surface uplift suggest that complete relief of deep coupling over multiple decades may be accomplished by time-varying rates of aseismic slip

    Effects of Chronotype and Social Jetlag on Blood Biomarkers During WLFF 2-Week Critical Training Period

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    Chronotype, an individual\u27s natural preference towards activity during certain times of the day, influences the interaction between one\u27s internal circadian rhythms and the external environment. When this is disrupted, it can result in social jet lag (SJL), the misalignment between our sleep/wake schedule on work days and free days. Wildland firefighters grapple with unpredictable and intense demands of their job, making them vulnerable to the challenges posed by SJL. Their duties necessitate abrupt changes in active hours, pushing against their body\u27s inherent circadian preferences. SJL is a behavioral trait that may alter an individual\u27s ability to respond to high stress environments and situations. PURPOSE: To analyze the relationship between chronotype and social jet lag on blood biomarkers during a WLFF 2-week Critical Training period. METHODS: Participants underwent baseline testing which included the Morningness-Eveningness Questionnaire and the Munich Chronotype Questionnaire. Anthropometric measurements were recorded alongside body composition via skinfold measurements. A comprehensive blood draw was conducted to analyze Complete Blood Count. Following baseline assessments, participants entered a 12-day CT period. During this period, daily activity and HR were monitored. Participants maintained a daily training log, sleep log, and completed a Visual Analog Scale for sleep quality and muscle soreness. Upon completion of the CT period, the same measurements as the baseline testing were completed. RESULTS: 25 participants completed the study. Chronotype analysis showed a ME of exercise in lactate dehydrogenase (LDH) and creatine kinase (CK) with both increasing post-CT in intermediate (INT) and morning-types (MT) (p1h of SJL (pCONCLUSION: This data shows that chronotype and SJL had modest effects on blood biomarkers in response to a 2-week CT period but the magnitude of SJL does influence the increase in muscle damage biomarkers. Strategies to mitigate SJL among WLFFs may be necessary to manage the effects of hard training

    Techniques for Achieving High Isolation in RF Domain for Simultaneous Transmit and Receive

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    With the growth of wireless data traffic, additional spectrum is required to meet consumer demands. Consequently, innovative approaches are needed for efficient management of the available limited spectrum. To double the achievable spectral efficiency, a transceiver can be designed to receive and transmit signals simultaneously (STAR) across the same frequency band. However, due to the coupling of the high power transmitted signal into the collocated receiver, the receiver\u27s performance is degraded. For successful STAR realization, the coupled high-power transmit (Tx) signal should be suppressed by 100-120 dB over the entire operational bandwidth. So far, most STAR implementations are narrowband, and not useful for ultra wideband (UWB) communications. In this paper, we present a review of novel approaches employed to achieve improved cancellation across wide bandwidths in RF and propagation domains. Both single and multi-antenna systems are considered. Measurements show an average cancellation of 50 dB using two stages of RF signal cancellation
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