8,282 research outputs found
Trials of Celebrity
No full textThis issue of Pacific Journalism Review engages with the theme of the dynamics of fame in a small country. In contrast to the dominant focus of the newly emergent field of Celebrity Studies on celebrity as a global phenomenon, the emphasis in this issue is on the interface between the global and the local; on questions of how the distinctiveness of national and local values fares when caught up or willingly imitating the circulation of global fame and influence
Trials of Celebrity
No full textThis issue of Pacific Journalism Review engages with the theme of the dynamics of fame in a small country. In contrast to the dominant focus of the newly emergent field of Celebrity Studies on celebrity as a global phenomenon, the emphasis in this issue is on the interface between the global and the local; on questions of how the distinctiveness of national and local values fares when caught up or willingly imitating the circulation of global fame and influence
A 0.96-mW dB-Linear Variable Gain Amplifier With 0.4-dB Linearity Error Over a 62.4-dB Gain Tuning Range
No full textThis letter presents a low-power dB-linear variable gain amplifier (VGA) with a small linear-in-dB error over a wide gain tuning range. An exponential current ratio is realized in the linear-in-dB control circuit based on the subthreshold I-V characteristic. The VGA is built with subthreshold common-gate transistors as current steering, accurately replicating the exponential current ratio and forming a tunable gain. Implemented in 55-nm CMOS technology, the proposed VGA occupies a compact active area of 0.011 mm2 excluding the buffer. It achieves a linear-in-dB error of 0.4 dB over a gain tuning range of 62.4 dB, corresponding to the state-of-the-art relative error of 0.6%. The proposed design shows constant 80-MHz bandwidth with a power consumption of 0.96 mW. Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.Electronic Instrumentatio
DB 2020: Analyzing and Forecasting DB Market Trends
No full textabstract: Over the last two decades, Alternative Project Delivery Methods (APDM), such as Design-Build (DB), have become more popular in the construction industry, specifically in the U.S., and the competition for APDM projects has risen among construction companies. The Engineering News Record (ENR) magazine analyzes DB firms and publishes the list of the top 100 every year. According to ENR articles and many scientific papers, the implementation of DB method has grown drastically over the last decade, however, information about growth trends depending on firm size and segment is lacking. Also missing is knowledge the future market trends over the next five years. Furthermore, public agencies and DB firms may be worried that DB projects do not distribute wealth equally among DB firms. Using the top 100 firms deemed representative of the DB market, the author has divided the market into volumes based on rankings to analyze the total DB market revenue growth. A comparison between international and domestic revenues indicated that the top five DB firms have 64% more involvement in the international market compared to the domestic market. Furthermore, while the research shows increasing market share only for the top five firms, the author has found that (1) a large portion of their market share is due to a large growth in their international market, and (2) revenues for all volumes of the DB market have increased. Moreover, regression and time series analyses allow for the forecasting of the DB market growth, which the author anticipate to move from about 150B in 2020.Dissertation/ThesisMasters Thesis Construction 201
A -109.1 dB/-98 dB THD/THD+N Chopper Class-D Amplifier with >83.7 dB PSRR Over the Entire Audio Band
No full textThis paper reports a chopper Class-D audio amplifier that obtains high PSRR over the entire audio band. A chopping scheme is proposed to minimize intermodulation distortion between pulse-width modulation (PWM) and chopping in the audio band. A high-voltage chopper is developed to handle a 14.4 V PWM signal. Timing matching techniques are proposed to minimize chopping nonidealities which ensure good PSRR and THD. Fabricated in a 180nm BCD process, the prototype obtains a PSRR >109 dB at 217 Hz and >83.7 dB over the entire audio band. It also achieves -109.1 dB/-98 dB THD/THD+N and can deliver a maximum of 13 W to an 8-Ω load.Accepted author manuscriptElectronic Instrumentatio
Replication Data for: Syneruptive incorporation of martian surface sulphur in the nakhlite lava flows revealed by S and Os isotopes and highly siderophile elements: implication for mantle sources in Mars.
No full textThe data set contains petrographic (BSE and X-ray maps), chemical (highly siderophile elements), and stable isotope (in situ ∆33S and δ34S for sulpide grains) data for five Martian meteorite samples (nakhlites). Samples were obtained from the Natural History Museum of London and NASA Johnson Space Center. Scanning Electron Microscopy was performed at the Imaging Spectroscopy and Analysis Centre of the University of Glasgow (Great Britain). Sulphur isotope compositions were measured at the Centre de Recherches Pétrographiques et Géochimiques in Nancy (France). Highly siderophile element data were obtained at the Durham Geochemistry Centre, Durham University (Great Britain) and at the Institute of Geological Sciences, Freie Universität Berlin (Germany)
Replication Data for: Syneruptive incorporation of martian surface sulphur in the nakhlite lava flows revealed by S and Os isotopes and highly siderophile elements: implication for mantle sources in Mars.
No full textThe data set contains petrographic (BSE and X-ray maps), chemical (highly siderophile elements), and stable isotope (in situ ∆33S and δ34S for sulpide grains) data for five Martian meteorite samples (nakhlites). Samples were obtained from the Natural History Museum of London and NASA Johnson Space Center. Scanning Electron Microscopy was performed at the Imaging Spectroscopy and Analysis Centre of the University of Glasgow (Great Britain). Sulphur isotope compositions were measured at the Centre de Recherches Pétrographiques et Géochimiques in Nancy (France). Highly siderophile element data were obtained at the Durham Geochemistry Centre, Durham University (Great Britain) and at the Institute of Geological Sciences, Freie Universität Berlin (Germany)
Replication Data for: Syneruptive incorporation of martian surface sulphur in the nakhlite lava flows revealed by S and Os isotopes and highly siderophile elements: implication for mantle sources in Mars.
No full textThe data set contains petrographic (BSE and X-ray maps), chemical (highly siderophile elements), and stable isotope (in situ ∆33S and δ34S for sulpide grains) data for five Martian meteorite samples (nakhlites). Samples were obtained from the Natural History Museum of London and NASA Johnson Space Center. Scanning Electron Microscopy was performed at the Imaging Spectroscopy and Analysis Centre of the University of Glasgow (Great Britain). Sulphur isotope compositions were measured at the Centre de Recherches Pétrographiques et Géochimiques in Nancy (France). Highly siderophile element data were obtained at the Durham Geochemistry Centre, Durham University (Great Britain) and at the Institute of Geological Sciences, Freie Universität Berlin (Germany)
A - 121.5-dB THD Class-D Audio Amplifier With 49-dB LC Filter Nonlinearity Suppression
No full textClass-D audio amplifiers produce electromagnetic interference (EMI), which often needs to be suppressed by an external LC filter. However, due to component nonlinearity, this filter can itself cause significant distortion. This article presents a class-D amplifier that suppresses LC filter nonlinearity by 49 dB and is robust to ±30% variations in its cutoff frequency. This is achieved by a dual-loop architecture, in which an inner loop provides stability, while an outer loop provides the high gain needed to suppress the LC filter and output-stage nonlinearity. A prototype, implemented in a 180-nm BCD process, achieves -121.5-dB total harmonic distortion (THD) and -107.1-dB THD+N, which is maintained to within 3 dB even as the LC filter cutoff frequency is varied from 62 to 106 kHz. It can deliver a maximum of 21 W into a 4-Ω load with 87% efficiency and 12 W into an 8-Ω load with 91% efficiency, measured at 10% THD. Green Open Access added to TU Delft Institutional Repository 'You share, we take care!' - Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.Electronic InstrumentationMicroelectronic
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