271,184 research outputs found
Establishment of the nomenclatural status of two nomina, Stenothoe bella Krapp-Schickel & Lo Brutto, 2015 and Stenothoe levantina Krapp-Schickel & Lo Brutto, 2015 (Crustacea, Peracarida), unavailable for the International Code of Zoological Nomenclature
No full textKrapp-Schickel, Traudl, Brutto, Sabrina Lo (2022): Establishment of the nomenclatural status of two nomina, Stenothoe bella Krapp-Schickel & Lo Brutto, 2015 and Stenothoe levantina Krapp-Schickel & Lo Brutto, 2015 (Crustacea, Peracarida), unavailable for the International Code of Zoological Nomenclature. Zootaxa 5092 (2): 247-248, DOI: https://doi.org/10.11646/zootaxa.5092.2.
Letter, [Author unclear] to Paulina T. Merritt
No full textHandwritten letter to Paulina Merritt from an unknown author, October 1, 1876.
Cavity-backed T-fed slot antenna
No full textCavity-backed slot antennas are experiencing a revival because of the ever-increasing need for low-profile and conformal antennas which have a low radar cross section out of their operating frequency bands. Like thin microstrip patch antennas, cavity-backed slot antennas typically have a narrow impedance bandwidth of 1 to 6 percent of center frequency, which limits their usage. A new method of feeding a thin cavity slot antenna with a stripline leading to a T-bar, which lies beneath or in the slot, greatly enhances the impedance bandwidth over a range of 10 to 30 percent depending on the slot width.In the past, the design parameters for the T-fed slot antenna were obtained empirically. A computer model is developed in this thesis to provide a vehicle for analyzing the antenna's performance prior to fabrication. Since the antenna cavity is thin, there is a complex interaction between the T-bar, slot, stripline feed, and modes of the cavity.In the antenna model, all of the cavity apertures are closed with a perfect conductor, and the fields there and on the T-bar are replaced with equivalent currents. The analysis is simplified by the superposition principle to obtain the total fields in the cavity by summing all the fields produced independently by each equivalent current source in the closed cavity. A method of moments approach is used to find the coefficients of the unknown equivalent sources by matching the fields in the cavity and the stripline to the appropriate boundary conditions. From these values the impedance of the antenna is determined. To verify the model, T-fed slot antennas were fabricated and measured at X-band and S-band. The calculated and measured values are compared.Made available in DSpace on 2011-05-07T12:17:04Z (GMT). No. of bitstreams: 2
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DVB-T Positioning with a One Shot Receiver
No full textIn this paper a one shot receiver for DVB-T positioning is presented. DVB-T SFN signals can be used as Signals-of-Opportunity in urban environment to assist GNSS in case the GNSS-only positioning shows degraded performance. The normal mechanism of DVB-T positioning involves a tracking stage to refine the coarse delay estimation obtained by the acquisition stage. However due to the high SNR of DVB-T signals, the delay estimation can be refined by some simple interpolation methods with lower complexity and power consumption. Two different interpolation methods, linear interpolation and sinc interpolation, are analysed in the paper. Simulation results show that the one shot receiver proposed in this paper behaves as a tracking-based receiver, but exhibits a lower complexit
Using two GNSS satellites and few DVB-T signals for positioning in dynamic scenarios
No full textIn this paper, we study a hybrid positioning system working with two GNSS satellites and two DVB-T transmitters in a SFN. By calculating the TDOA between the two satellites, the receiver clock error can be eliminated and a hyperboloid surface can be generated. The user location will result on a line generated by intersecting the hyperboloid surface with the earth surface. A similar approach is used with DVB-T signals. One of the challenges to overcome in the positioning methods based on DVB-T/SFN signals is to distinguish the signals transmitted by different emitters. Here we assume that the user can first computes his own position by GNSS during an initialization phase. This initial information can be used to correctly associate the DVB-T signals and select two of them with good properties for the hybrid positioning implementation. The simulation results show that this hybrid system works with good performanc
L’accesso ai documenti relativi all’amministrazione straordinaria di banche nell’ordinamento europeo: il caso Banca Carige (nota a Corte di Giustizia EU, 28 settembre 2022 - Case T-552/19 OP e 29 giugno 2022 - Case T‐501/19)
No full textLa Sezione IV della Corte di Giustizia dell’Unione Europea, con le sentenze del
28 settembre 2022 (Malacalza Investimenti v European Central Bank – T-552/19 OP)
e del 29 giugno 2022 (Corneli v European Central Bank – T-501/19) si è pronunciata
sulla vicenda che ha interessato Banca Carige, confermando che la Banca Centrale
Europea non avrebbe potuto negare alla Malacalza Investimenti s.r.l. e alla Sig.ra
Corneli l’accesso ai documenti con i quali era stata decretata l’amministrazione straordinaria della Banca
Handwritten biographical information on Paulina T. McClung Merritt
No full textA handwritten biography of Paulina T. McClung Merritt by an unknown author, 1892.
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