482 research outputs found
A criação de "Numa clara manhã de abril", de Marcos Iolovitch, no contexto histórico
No full textEste artigo procura inserir no contexto histórico o primeiro trabalho literário a usar a comunidade judaica brasileira como tema principal, o romance autobiográfico Numa clara manhã de abril, de Marcos Iolovitch, originalmente publicado em 1940. Iolovitch foi um imigrante que veio da Rússia no início do século XX para uma comunidade agrícola estabelecida pela Jewish Colonization Association (JCA ou ICA) na região sul do Brasil. Pretendemos discutir as condições sociais, culturais e econômicas tanto na Rússia quanto no Brasil, assim como as ações governamentais destes países durante o período 1801-1930, que contribuíram para a escrita deste romance e formaram o pano de fundo para os eventos e as ideias discutidas pelo autor. Nossa discussão inclui o estabelecimento de comunidades agrícolas judaicas na Rússia e o papel dos menonitas em sua administração, os esforços do Barão Maurice Hirsch e da ICA para estabelecer comunidades agrícolas para imigrantes russos, os motivos comerciais da ICA no Brasil, o efeito de convulsões políticas e econômicas no Brasil sobre os imigrantes judeus e o incentivo oferecido a escritores pela rica vida intelectual em Porto Alegre, a capital do estado do extremo sul do Brasil. Além das fontes secundárias, fundamentamos nossa discussão com memórias originais de menonitas e com relatórios e documentos do Departamento de Estado dos Estados Unidos da América das primeiras décadas do século XX. The Creation of On a clear April morning, by Marcos Iolovitch, in historical context - Abstract: This article seeks to place in historical context the first literary work to use the Brazilian Jewish community as subject matter, the autobiographical novel, On a Clear April Morning, by Marcos Iolovitch, originally published in 1940. Iolovitch was an early 20th century immigrant to the farming communities set up by the Jewish Colonization Association (JCA) in the south of Brazil. We propose to discuss social, cultural, and economic conditions in both Russia and Brazil, as well as governmental actions in both countries during the period 1801-1930 that led to the writing of this novel and formed the background for the events and ideas discussed by the author. Our discussion will include the establishment of Jewish farming communities in Russia and the role of Mennonites in their administration, the efforts by Baron Maurice Hirsch and the JCA to establish farming communities for Russian immigrants, the commercial motives of the JCA in Brazil, the effect of political and economic upheavals in Brazil on Jewish immigrants and the support offered to writers by the rich intellectual life in Porto Alegre, Brazil’s southernmost state capital. In addition to secondary sources, we will support our discussion with published interviews with Marcos Iolovitch, original Mennonite memoirs and early 20th Century U.S. Department of State reports and documents.
No ad blockers for old men? : demographic evidence for ad blocker usage from Germany
No full textWeb users are turning to ad blockers to avoid ads because they perceive them as an invasion of privacy, as annoying or as slackening their internet browsing experience. There has been significant research into factors driving ad blocker adoption. In this paper, the author will highlight significance correlation between ad blocker usage and age. The author conducted an online survey and built two groups, ad blocker users and non-users. When checking for significant differences in the demographic data, the author has found significant difference in the age of ad blocker users
19.1 A 300MHz-BW, 27-to-38dBm In-Band OIP3 sub-7GHz Receiver for 5G Local Area Base Station Applications
No full textRecently, the so-called sub-6GHz band of the 5G new radio (NR) has been extended to 7.125GHz to address the relentless customer demand for higher data-rate communication. This demands a new design approach for the local area base-station (LA-BS) receivers (RXs) to cover a wide operating frequency range of 0.41 to 7.125GHz. Moreover, for NR bands above 3GHz, the maximum RF bandwidth (BW) is as high as 400MHz, in which a -35dBm modulated in-band (IB) blocker can be present. These impose stringent BW and IB linearity requirements for the baseband amplifiers in the LA-BS receivers. In addition to IB interferences, a -15dBm continuous-wave (CW) out-of-band (OOB) close-in blocker can also be present at 60MHz offset frequency from the passband edges, thus demanding a highly selective RX. Finally, the blocker 1dB compression point (B1textdB) becomes a key parameter for local area co-location applications in which the power of the far-out OOB blocker can be as large as -4dBm.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
A Six-Phase Two-Stage Blocker-Tolerant Harmonic-Rejection Receiver
No full text| openaire: EC/H2020/704947/EU//ADVANTAG5Modern wideband receivers need to operate linearly in the presence of strong out-of-band blockers. In this article, we introduce a blocker-tolerant harmonic rejection (HR) receiver, which can suppress blockers at the local oscillator harmonics. The suppression is achieved by applying the HR in two stages, such that the first HR already occurs at the first gain-stage output. The proposed receiver achieves this HR with a simple six-phase local-oscillator (LO) clocking. The proposed design also uses simple gain coefficients of ±1 while implementing HR in two stages that compensates for the mismatch effects of each stage. In addition, the near-band blocker linearity is improved by implementing a third-order baseband feedback response, which acts in conjunction with the N -path filtering. Implemented in a 28-nm Fully-Depleted Silicon-on-Insulator (FDSOI) process, the receiver demonstrates the 18-37-dB HR from the first stage and 46-53 dB of HR in total. Furthermore, a blocker compression point (BCP) of 2.5 dBm fora third harmonic blocker and a near-band BCP of -6.5 dBm are achieved.Peer reviewe
Reduced occurrence of appropriate therapy for ventricular arrhythmias after beta-blocker uptitration following implant of a primary prevention CRT-defibrillator
No full textBackground: Absence of beta-blocker use independently predicts appropriate therapy. Following cardiac resynchronisation therapy (CRT) implant, reverse remodelling and protection against bradycardia allows for beta-blocker dose uptitration. The differential dosing effects on the occurrence of a first episode of appropriate therapy in primary prevention CRT-defibrillator (CRT-D) patients remains unstudied. Methods and Results: Changes in beta-blocker dose following CRT-D in consecutive primary prevention patients implanted between 2008 and 2015 were retrospectively studied. Beta-blocker dose was expressed as percent of target dose. Uptitration of beta-blocker dose following implant was calculated as the change in percent of target dose between implant and 6-months follow-up. Results from a prospectively maintained database of all device analysis were used to determine the occurrence of appropriate therapy. A total of 162 patients (68 +/- 8 years) were studied. One hundred and ten (68%) patients underwent uptitration (mean 47 +/- 19% in target dose) and 52 (32%) remained on a stable beta-blocker dose. During 37 +/- 22 months follow-up, the cumulative percent of appropriate therapy was 31% in patient receiving no-uptitration versus 10% in the uptitrated patients (p < 0.001). After correction for known predictors of appropriate therapy, uptitration was independently associated with an OR = 0.263 (CI = 0.103-0.675; p = 0.001) for the occurrence of appropriate therapy. Every 1%-increase in target dose for beta-blocker associated with a significant lower risk for appropriate therapy, OR = 0.982 (CI = 0.965-0.999; p = 0.042). Conclusion: Following implantation of a primary prevention CRT-D, uptitration of beta-blockers associated with a reduced occurrence of a first episode of appropriate therapy for ventricular arrhythmias. An inverse dose-response effect was seen between beta-blocker dose and appropriate therapy.Martens, P (reprint author), Ziekenhuis Oost Limburg, Dept Cardiol, Schiepse Bos 6, B-3600 Genk, Belgium.
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SAW-less GNSS Front-End Amplifier with 80.4-dB GSM Blocker Suppression Using CMOS Directional Coupler Notch Filter
No full textThis paper presents a SAW-less GNSS front-end amplifier with GSM blocker suppression using CMOS directional coupler notch filter. The front-end amplifier is aimed at the GNSS receiver integrated in cellular phones. Based on our proposed CMOS stacked spiral-coupled (SSC) directional coupler working at the frequency of 900MHz as notch filter, the front end amplifier achieves a NF of 1.7dB and a 80.4-dB suppression of the GSM blocker while provides signal gain of 38.6-dB for the GPS L1-band signal.http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000332006801001&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701Engineering, Electrical & ElectronicEICPCI-S(ISTP)
Use of Non-Selective Beta-Blocker for Refractory Stomal Variceal Hemorrhage
No full textBleeding stomal varices are often difficult to manage given the comorbidities that are associated with their presentation. Here, we report a case of a 62-year-old female with stomal variceal hemorrhage in the setting of chronic portal vein thrombosis who was ineligible for transhepatic intrajugular portosystemic shunt or surgery as a result of her challenging anatomy and peri-operative risks. Despite coil embolization, this patient experienced refractory bleeds which ceased following the initiation of a non-selective beta-blocker (NSBB). This case provides further evidence for the expanding role of NSBBs as an important therapeutic agent for complicated ectopic varices.Memorial University Open Access Author's Fun
6.5 A 3dB-NF 160MHz-RF-BW Blocker-Tolerant Receiver with Third-Order Filtering for 5G NR Applications
No full textThe introduction of the fifth-generation (5G) New Radio (NR) standard has imposed several challenges in the design of sub-6GHz receivers (RX). Firstly, the maximum channel bandwidth(2BW) increases to 100MHz, while a -15dBm continuous-wave (CW) blocker can be located only \Delta f=85MHz away from the desired band edge. Such a small \Delta f/BW(\sim2) places a stringent linearity requirement on an RX, thus demanding the use of higher-order filtering. Secondly, in-band (IB) linearity also becomes critical, since the band of interest may contain many signals resulting from carrier aggregation and digital beamforming 0peration. Finally, a sub-3dB noise Figure (NF) is required to achieve the highest possible link budget, which allows to maximize the spectral efficiency and data rate.Electronic
Deleting collected digital evidence by exploiting a widely adopted hardware write blocker
No full textAbstractIn this primary work we call for the importance of integrating security testing into the process of testing digital forensic tools. We postulate that digital forensic tools are increasing in features (such as network imaging), becoming networkable, and are being proposed as forensic cloud services. This raises the need for testing the security of these tools, especially since digital evidence integrity is of paramount importance. At the time of conducting this work, little to no published anti-forensic research had focused on attacks against the forensic tools/process. We used the TD3, a popular, validated, touch screen disk duplicator and hardware write blocker with networking capabilities and designed an attack that corrupted the integrity of the destination drive (drive with the duplicated evidence) without the user's knowledge. By also modifying and repackaging the firmware update, we illustrated that a potential adversary is capable of leveraging a phishing attack scenario in order to fake digital forensic practitioners into updating the device with a malicious operating system. The same attack scenario may also be practiced by a disgruntled insider. The results also raise the question of whether security standards should be drafted and adopted by digital forensic tool makers
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