18,998 research outputs found
Enoploclytia tepeyacensis Vega & Garassino & Zapata-Jaime 2023, sp. nov.
No full textEnoploclytia tepeyacensis sp. nov. (Fig. 1A–D) Enoploclytia tepeyacensis Vega, Garassino & Zapata-Jaime in Vega et al. 2013: 209–211, figs. 2 [unavailable]. Type material. HOLOTYPE: MUZ-824, carapace preserving dorsal surface, carapace length 96.8 mm, width 53.2 mm, height 44.2 mm, early Campanian beds of the Austin Group (Dessau Formation) near Jiménez, Coahuila, NE Mexico. PARATYPE: MUZ-825, carapace preserving only left side, length 65.9 mm, height 32.1 mm, same locality as holotype. Diagnosis. Carapace elongate and cylindrical; deep cervical groove, gently inclined, intercepting dorsal margin at an angle of ca. 60°; dorsal midline of the carapace without intercalated plate; deep, very reduced gastro-orbital groove; deep, sinuous postcervical groove, intercepting dorsal margin at an angle of ca. 50°; deep, very short branchiocardiac groove, not joining postcervical groove, not extending ventrally below mid-height, intercepting dorsal margin at an angle of ca. 60°; deep hepatic groove, strongly convex ventrally at intersection with postcervical groove and strongly concave dorsally at intersection with cervical groove; deep inferior groove strongly convex posteriorly; all regions of the carapace covered dorsally with strong tubercles, becoming reduced in size ventrally. Etymology. The trivial name alludes to El Tepeyac area, Coahuila, where the Mexican specimens were discovered. Remarks. A full description and figures of Enoploclytia tepeyacensis, and stratigraphic account are given by Vega et al. (2013).Published as part of Vega, Francisco J., Garassino, Alessandro & Zapata-Jaime, Régulo, 2023, Validation of Enoploclytia tepeyacensis Vega, Garassino, & Zapata-Jaime (Crustacea: Decapoda: Erymidae) from the Cretaceous (Campanian) of Mexico, pp. 498-500 in Zootaxa 5315 (5) on pages 498-500, DOI: 10.11646/zootaxa.5315.5.9, http://zenodo.org/record/814243
Recent Results From the EU POF-PLUS Project: Multi-Gigabit Transmission Over 1 mm Core Diameter Plastic Optical Fibers
No full textRecent activity to achieve multi-gigabit transmission over 1 mm core diameter graded-index and step-index plastic optical fibers for distances up to 50 meters is reported in this paper. By employing a simple intensity-modulated direct-detection system with pulse amplitude or digital multi-tone modulation techniques, low-cost transceivers and easy to install large-core POFs, it is demonstrated that multi-gigabit transmission up to 10 Gbit/s over 1-mm core diameter POF infrastructure is feasible. The results presented in this paper were obtained in the EU FP7 POF-PLUS project, which focused on applications in different scenarios, such as in next-generation in-building residential networks and in datacom applications
Ordenación de San Vicente de Jaime de Huguet
No full textVidrio, Negativo, Diapositiva, 85 x 100 mm, Gelatino Bromuro, S_fragmentado C, S_reforzado, E_Integra, E_materializadaPintura dela Ordenación de San Vicente de Jaime de Huguet, en el retablo de Sarría de Barcelona, hoy en el Museo de Arte de CataluñaUnidad Documenta
Correcting MM estimates for "fat" data sets
No full textRegression MM estimates require the estimation of the error scale, and the determination of a constant that controls the efficiency. These two steps are based on the asymptotic results that are derived assuming that the number of predictors p remains fixed while the number of observations n tends to infinity, which means assuming that the ratio p/n is "small". However, many high-dimensional data sets have a "large" value of p/n (say, ≥0.2). It is shown that the standard asymptotic results do not hold if p/n is large; namely that (a) the estimated scale underestimates the true error scale, and (b) that even if the scale is correctly estimated, the actual efficiency can be much lower than the nominal one. To overcome these drawbacks simple corrections for the scale and for the efficiency controlling constant are proposed, and it is demonstrated that these corrections improve on the estimate's performance under both normal and contaminated data.Fil: Maronna, Ricardo Antonio. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de La Plata. Facultad de Ciencias Exactas; ArgentinaFil: Yohai, Victor Jaime. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentin
Establecimiento de un vivero de plantas de jardín con el fin de utilizarlas en la ornamentación de las instalaciones del Politécnico Colombiano Jaime Isaza Cadavid Seccional Urabá
No full textIncluye anexosIncluye Lista de referenciasTrabajo de Grado presentado para optar al título (Tecnólogo en Producción Agropecuaria). Politécnico Colombiano Jaime Isaza Cadavid - Facultad de ciencias agrarias. 2014PDFTeniendo en cuenta la normatización ambiental y la Ley de educación que promueven la conservación de la biodiversidad a la vez que suscitan crear espacios y ambientes agradables en Instituciones educativas, y el espíritu investigativo se desarrolla este proyecto en el Politécnico Colombiano Jaime Isaza Cadavid, sede Urabá, ubicado en el corregimiento el Reposo del municipio de Apartadó, Antioquia. Sus condiciones climáticas son: altura 30 m.s.n.m., temperatura promedio 28°C, precipitación 3.000 mm promedio año, humedad relativa 85%, brillo solar 4,4 horas/día, los suelos son de topografía plana y se encuentra bajo las condiciones agroecológicas del bosque húmedo Tropical (bh-T). Para el desarrollo del proyecto se colectaron 239 plantas ornamentales de 33 especies, en diferentes lugares de la zona, adaptadas a las condiciones agroecológicas de la región y se establecieron en un vivero en 160 m2 el cual se construyó cerca de las instalaciones con la infraestructura adecuada, éste permitirá buenas condiciones para el crecimiento de las especies establecidas que servirán como material de siembra en las áreas verdes que requiera intervenir el politécnico. Igualmente, se mejoró un área de acceso al auditorio del Politécnico mediante la implementación de un diseño de jardín utilizando algunas de las especies colectadas. Además de los resultados, en el primer capítulo, se presenta una revisión de literatura sobre la instalación de viveros de plantas ornamentales, las características de las mismas y la selección de especies para un diseño de jardín acorde con los recursos que se dispongan para realizarlo. Además, se identifican y se describen las especies recomendadas para la zona con base en lo cual se realizó la recolección de materiales, lo que servirá de guía para otros proyectos que se pretenda desarrollar en esta área
Employing M1 direct calibration/de-embedding approaches for large signal model validation at mm-wave frequencies
No full textIn this contribution, we employ direct calibration/de-embedding approaches to validate the large signal device model of state-of-the-art HBTs and CMOS technologies operating in the mm-wave frequency band WR6. The capability of placing the first tier calibration reference plane in close proximity to the DUT allows the large signal metric to be directly compared with foundry models.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
FIGURE 2. Mauroniscus chilensis n in Description of a new species of Mauroniscus Bourgeois, 1911 from Chile (Coleoptera: Mauroniscidae)
No full textFIGURE 2. Mauroniscus chilensis n. sp.: Female, a: ventrite VIII, scale 0.25 mm; b: spermathecal sclerite, scale 0.05 mm; c: pygidium, scale 0.25 mm; Male, d: ventrite VIII; e: pygidium; f: IX segment, scale 0.2 mm. Male genitalia, g: tegmen dorsal view; h: edeagus dorsal view; i: median lobe dorsal view, scale 0.2 mmPublished as part of Estrada, Patricia & Solervicens, Jaime, 2021, Description of a new species of Mauroniscus Bourgeois, 1911 from Chile (Coleoptera: Mauroniscidae), pp. 127-132 in Zootaxa 4915 (1) on page 130, DOI: 10.11646/zootaxa.4915.1.9, http://zenodo.org/record/445256
Dynamic Estimation of Vital Signs with mm-wave FMCW Radar
No full textIn this paper, we propose a method for continuous monitoring of vital signs-in particular, respiration frequency-with a commercial mm-wave radar. The nearly constant frequency (NCF) model is adopted to represent chest displacement due to respiration and simulate radar response. Based on this model, an extended Kalman filter (EKF) based estimator is developed to track the breathing frequency of a person. The impact of dynamic model parameters is investigated in numerical simulation. The possibility to track breathing frequency with the proposed method is demonstrated by experimental data processing. 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.Microwave Sensing, Signals & System
FIGURES 1−3. 1 in Two new synonymies in the genus Praocis (Coleoptera: Tenebrionidae)
No full textFIGURES 1−3. 1. Praocis sulcata Eschscholtz, lectotype, length: 8.5 mm; 2. P. rotundata Lacordaire, length: 10.5 mm; 3. P. soror Kulzer, holotype, length: 10.0 mm.Published as part of Flores, Gustavo E. & Pizarro-Araya, Jaime, 2010, Two new synonymies in the genus Praocis (Coleoptera: Tenebrionidae), pp. 65-68 in Zootaxa 2386 (1) on page 67, DOI: 10.11646/zootaxa.2386.1.5, http://zenodo.org/record/530703
A 23-to-29GHz Receiver with mm-Wave N-Input-N-Output Spatial Notch Filtering and Autonomous Notch-Steering Achieving 20-to-40dB mm-Wave Spatial Rejection and -14dBm In-Notch IP1 dB
No full textDigital beamforming receivers (RXs) support MIMO operation and offer great flexibility and accuracy in multi-beam formation and calibration. However, compared with analog phased-array and hybrid systems, due to the absence of any rejection for spatial in-band blockers, the RX/ADC dynamic range and linearity should be high enough to prevent array saturation. Therefore, the use of self-steering spatial notch filters (SNFs) is necessary to aid the digital beamformers and reduce RX/ADC power consumption while strong blockers exist. To address that, the sub-6GHz RXs in [1], [2] synthesize a baseband spatial notch impedance and translate it to RF by passive mixers. However, this technique cannot be directly applied at mm-wave frequencies as the impedance translational performance of the passive mixers degrades significantly. Hence, the mm-wave beamformer in [3] realizes a cascadable SNF at an intermediate frequency (IF). However, the front-end mm-wave components like mixers and phase shifters have to tolerate strong blockers, thus degrading RX linearity. Besides, it uses multiple IF buffers and VGAs for signal scaling and combining, which could be power-hungry if a similar method is adopted to realize a mm-wave SNF. To improve on those limitations, we propose a scalable SNF structure, which (1) suppresses the strongest in-band blocker at mm-wave frequencies, (2) supports N-input-N-output MIMOs, and (3) requires no active blocks except the phase shifters. A two-step autonomous notch-steering technique is also developed to adjust the SNF notch direction power-efficiently and accurately.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
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