152,730 research outputs found
ho sheng
No full textÓrgano de boca de procedencia china inventado cerca del siglo III A. C.1) Procedencia: China
2) Estado de conservación: Bueno
3) Uso (Características performáticas): La invención del Sheng es atribuida al soberano chino Nyú-Kwa (ca. 2800 A.C.). Se lo menciona desde el Siglo XII A.C. aunque no existen representaciones hasta el siglo VI de nuestra era. Hay diferentes variedades que se distinguen por su tamaño y por el número y función de los tubos. El sheng se ejecuta sosteniendo el recipiente con las palmas de ambas manos mientras se sopla o aspira por el pico y se obturan simultáneamente varios de los orificios de digitación. En el legajo se menciona que el instrumento es la representación simbólica de un “ave fénix”, aunque no se menciona bibliografía respaldatoria y llama la atención la mención al mito greco-romano en este otro contexto cultural (lo cual deja abierto el interrogante para futuras indagaciones de posibles intercambios y/o reinterpretaciones).
4) Historia (Eventos, actores, lugares, historias de uso, donantes, etc): No se encuentra nota de donación ni factura de compra. El ejemplar fue interpretado por Federico Jaureguiberry del grupo Mister América en el ciclo “Azzarini sónico”, noviembre de 2022. Colección Azzarini, 1964.
5) Reparaciones/Curaduría: No se realizaron
6) Referencias bibliográficas: Legajo Museo Azzarini, s/a. Museo Azzarini (1990) Instrumentos Musicales. Napoli: Coop. Laborart Associazione Culturale A.S.C
7) La fecha consignada (1964) corresponde a la creación de la colección Azzarini.
8) Información procesada en el marco del proyecto “(Re)Catalogación de los Instrumentos Musicales del Museo Azzarini-UNLP” 2022-2023, sujeta a modificaciones. Consultas y/o sugerencias especializadas: [email protected] de Instrumentos Musicales "Dr. Emilio Azzarini
Adaptive Bayesian Space-Time Equalisation for Multiple Receive-Antenna Assisted Single-Input Multiple-Output Systems
No full textThis contribution considers nonlinear space–time equalisation (STE) for multiple receive-antenna induced single-input multipleoutput (SIMO) systems. By exploiting the inherent symmetry of the underlying optimal Bayesian STE solution, a novel symmetric radial basis function (RBF) based STE scheme is proposed, which is capable of approaching the optimal Bayesian equalisation performance. Adaptive implementation of this symmetric RBF (SRBF) based STE can be achieved conveniently by estimating the SIMO channels using the least mean square channel estimator and computing the optimal RBF centres from the resulting SIMO channel matrix estimate. Simulation results also demonstrate that the performance of this SRBF based STE is robust with respect to the choice of the RBF variance value. The proposed adaptive solution is then extended to the space–time decision feedback equalisation (ST-DFE) structure
Tschumi, Lissitzky, Li-Sheng y el Sindicato Audiovisual: referencias para la comunicación arquitectónica
No full textMedios como el dibujo, técnicas artísticas y cinematográficas se han utilizado en Arquitectura para representar el espacio arquitectónico y su multiplicidad. Éstos han permitido, en algunos casos, comunicar intenciones de diseño y en otros, comprender la complejidad del espacio a través de herramientas no convencionales en las que se integran dimensiones como espacio, tiempo y ficción.
“Las transcripciones de Manhattan” de Tschumi, en las que se representa el espacio y los acontecimientos a través del dibujo; “sobre dos cuadrados” de El Lissitzky, en el que se relacionan dibujo, color y texto; los diagramas de la superposición de montañas de la pintura de Li-Sheng (Rivers, 1922) que vinculan espacio y secuencia y los documentales de la Bienal de Arquitectura de Quito 2020 (BAQ, 2020) en los que ficción, narrativa y tiempo se encuentran con espacios construidos emblemáticos, sirven de ejemplos gráficos y multimedia para representar y comunicar ideas sobre el espacio arquitectónico usando varios medios.
El objetivo de esta ponencia es presentar el material de diseño y representación arquitectónica realizado en varios formatos por los estudiantes en el ejercicio docente de los talleres formativos de Dibujo Arquitectónico y Diseño Básico de la Universidad Indoamérica en la ciudad de Ambato en Ecuador durante el período B22, entre los meses de septiembre del 2022 y abril del 2023; y el período A23, entre abril y agosto del 2023. De esta experiencia se desprende un análisis fotográfico de las nuevas y tradicionales formas de comunicación presentes en las narraciones, representaciones tridimensionales, dibujos axonométricos y secuencias en video realizados en base a los trabajos de Tschumi, El Lissitzky, Li-Sheng y el Sindicato Audiovisual
Error resilient techniques for storage elements of low power design
No full textOver two decades of research has led to numerous low-power design techniques being reported. Two popular techniques are supply voltage scaling and power gating. This thesis studies the impact of these two design techniques on the reliability of embedded processor registers and memory systems in the presence of transient faults; and with the aim to develop and validate efficient mitigation techniques to improve reliability with small cost of energy consumption, performance and area overhead. This thesis presents three original contributions. The first contribution presents a technique for improving the reliability of embedded processors. A key feature of the technique is low cost, which is achieved through reuse of the scan chain for state monitoring, and it is effective because it can correct single and multiple bit errors through hardware and software respectively. To validate the technique, ARMR Cortex TM -M0 embedded microprocessor is implemented in FPGA and further synthesised using 65-nm technology to quantify the cost in terms of area, latency and energy. It is shown that the presented technique has a small area overhead (8.6%) with less than 4% worst-case increase in critical path. The second contribution demonstrates that state integrity of flip-flops is sensitive to process, voltage and temperature (PVT) variation through measurements from 82 test chips. A PVT-aware state protection technique is presented to ensure state integrity of flip-flops while achieving maximum leakage savings. The technique consists of characterisation algorithm and employs horizontal and vertical parity for error detection and correction. Silicon results show that flip-flops state integrity is preserved while achieving up to 17.6% reduction in retention voltage across 82-dies. Embedded processors memory systems are susceptible to transient errors and blanket protection of every part of memory system through ECC is not cost effective. The final contribution addresses the reliability of embedded processor memory systems and describes an architectural simulation-based framework for joint optimisation of reliability, energy consumption and performance. Accurate estimation of memory reliability with targeted protection is proposed to identify and protect the most vulnerable part of the memory system to minimise protection cost. Furthermore, L1-cache resizing together with voltage and frequency scaling is proposed for further energy savings while maintaining performance and reliability. The contributions presented are supported by detailed analyses using state-of-the-art design automation tools, in-house software tools and validated using FPGA and silicon implementation of commercial low power embedded processor
Exetastes compressus Watanabe & Sheng 2018, sp. nov.
No full textExetastes compressus sp. nov. (Figs 1–13) Exetastes fukuchiyamanus: Sheng & Sun, 2014: 52, 437 (in part). Holotype: CHINA: ♀, Xinbin, Laoning, 22. X. 2009, IT. (GSFPM). Paratypes: JAPAN: 1 ♀, Hyogo Pref., Kami Town, Niimi, Mikata-kogen, 12. X. 2012, S. Fujie leg. (KPMNH). CHINA: 1 ♀, Kuandian, Liaoning, 20. IX. 2006, M. - L. Sheng leg. (GSFPM); 1 ♀, Kuandian, Liaoning, 29. IX. 2006, C. Gao leg. (GSFPM); 1 ♀, Kuandian, Liaoning, 5. X. 2006, C. Gao leg. (GSFPM); 1 ♀, Kuandian, Laoning, 11. VIII. 2011, IT. (GSFPM); 1♀ & 13 ♂, baishilazi, Kuandian, Laoning, 11. IX. 2011, IT. (GSFPM); 1 ♀, Kuandian, Laoning, 15. IX. 2011, IT. (GSFPM); 1 ♀, baishilazi, Kuandian, Laoning, 6. X. 2011, IT. (GSFPM); 6 ♀ & 32 ♂, Kuandian, Laoning, 3. IX. 2015, M.- L. Sheng leg. (GSFPM); 7 ♀ & 4 ♂, Kuandian, Laoning, 4. X. 2015, IT. (GSFPM); 4 ♀, Kuandian, Laoning, 13 X 2015, IT. (GSFPM); 1 ♂, Xinbin, Liaoning, 26 VIII 2009, IT (GSFPM); 1 ♀ & 1 ♂, Xinbin, Laoning, 10. IX. 2009, IT. (GSFPM); 2 ♀ 2 M, Xinbin, Laoning, 24. IX. 2009, IT. (GSFPM); 2 ♂, Xinbin, Laoning, 8. X. 2009, IT. (GSFPM); 2 ♀, Xinbin, Laoning, 21. VI. 2017, IT. (GSFPM); 1 ♀, Shennongjia, Hubei, 10. X. 2011, Y. - Q. Li leg. (GSFPM); 1 ♀, Mentougou, Beijing, 24. IX. 2014, IT (GSFPM). Description. Female (n=33). Body length 10.0– 12.5 mm. Head 0.5–0.6 × as long as wide, covered with dense punctures and silver setae (Figs 1–3). Clypeus 0.5–0.6 × as long as wide, slightly convex in lateral view (Fig. 4). Face 0.5–0.6 × as long as wide, convex medially (Figs 3, 4). Length of malar space 0.47–0.5 × as long as basal mandibular width Mandible not strongly twisted (Fig. 3). OOL 0.8–0.9 × as long as POL. Antenna with 49–55 (HT: 53) flagellomeres. Fl1 1.6–1.8 × as long as Fl2. Apical flagellomeres except for distal segment widened, length less than width (or the same) (Fig. 2). Mesosoma covered with dense punctures and silver setae (Fig. 6). Epomia absent (Fig. 6). Pleural carina of propodeum strong posteriorly, weak anteriorly. Propodeum covered with irregular rugae, with a pair of indistinct longitudinal ridge medially, without a pair of sublateral convexities (Fig. 7). Fore wing length 8.5–10.0 mm. Vein 1 m-cu with a ramulus (Fig. 1). Areolet large, receiving vein 2 m-cu at middle (Fig. 1). Vein Rs strongly sinuated basally (Fig. 1). Hind femur 6.2–6.25 × as long as maximum depth in lateral view. Longest spur of hind tibia shorter than half length of first tarsomere. Hind first tarsomere 2.0–2.1 × as long as second tarsomere. Tarsal claws pectinate (Fig. 9). Metasoma strongly polished, covered with fine and sparse punctures (Fig. 10). T1 2.3–2.4 × as long as maximum width, covered with minute and transverse striae basally. T2 0.9–1.2 × as long as maximum width. Punctures on T2 and T3 relatively dense on basal 0.3 (Fig. 10). T4-T7 strongly compressed (Fig. 10). Ovipositor sheath 0.3-0.4 × as long as hind tibia, weakly widened apically, covered with brown setae. Colouration (Figs 1–10). Body (excluding wings and legs) black, except for: clypeus reddish-brown ventrally; mandibular teeth tinged with reddish-brown; antenna with a median white band; collar, posterodorsal corner of pronotum, and subalar prominence whitish-yellow; scutellum with a yellow spot; metasomal sternites blackishbrown; ovipositor reddish-brown. Wings hyaline. Veins and pterostigma blackish-brown except for yellowishbrown wing base. Legs black to blackish-brown except for: apical part of fore femur, fore and mid tibiae and tarsi more or less tinged with yellowish-brown; hind second to fourth tarsomeres whitish-yellow to white. Male (n=55). Similar to female. Body length 8.9–9.5 mm. Fore wing length 7.5–7.8 mm. Antenna with 49–55 flagellomeres. Lower-lateral portion of face, median portion of mandible, anterior and posterior sides of fore coxa, apical portion of mid coxa, ventral-apical portions of fore and mid femora, fore and mid tibiae and first to fourth tarsomeres, posterolateral portions of propodeum white (Figs 11–13). Distribution. Japan (Honshu) and China (Beijing, Hubei, and Liaoning). Bionomics. The host is unknown. All of adult wasps collected in autumn. Etymology. The specific name is from the strongly compressed metasomal tergites. Remarks. We recognized only a single female from Japan and thus this species may be rare in Japan. This species is similar to E. fukuchiyamanus, but clearly separated by the following character states: hind first tarsomere 2.1 × as long as second tarsomere (2.4–2.7 × in E. fukuchiyamanus); T2-T7 largely smooth dorsally (Fig. 10) (covered with dull-surface in E. fukuchiyamanus: Fig. 16); apical segments of female flagellum with length less than width (or the same) (Fig. 2) (length equal to or greater than width in E. fukuchiyamanus); dorsomedian area of collar nearly entirely white (Figs 5, 6, 11, 13) (at most with a pair of small yellowish-white spots in E. fukuchiyamanus: Figs 17, 17).Published as part of Watanabe, Kyohei & Sheng, Mao-Ling, 2018, Taxonomic notes on Exetastes fukuchiyamanus Uchida, 1928 (Hymenoptera, Ichneumonidae, Banchinae), with description of a new species from Japan and China, pp. 281-288 in Zootaxa 4399 (2) on pages 282-285, DOI: 10.11646/zootaxa.4399.2.11, http://zenodo.org/record/120655
Magnetoresistance in triphenyl-diamine derivative blue organic light emitting devices
No full textCopyright 2008 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. This article appeared in Journal of Applied Physics 103, 043706 (2008) and may be found at
An efficient predistorter design for compensating nonlinear memory high power amplifier
No full textThis contribution applies digital predistorter to compensate distortions caused by memory high power amplifiers (HPAs) which exhibit true output saturation characteristics. Particle swarm optimization is first implemented to identify the Wiener HPA’s parameters. The estimated Wiener HPA model is then directly used to design the predistorter. The proposed digital predistorter solution is attractive owing to its low on-line computational complexity, small memory units required and simple VLSI hardware structure implementation. Moreover, the designed predistorter is capable of successfully compensating serious nonlinear distortions and memory effects caused by the memory HPA operating in the output saturation region. Simulation results obtained are presented to demonstrate the effectiveness of this novel digital predistorter design
On multi-user EXIT chart analysis aided turbo-detected MBER beamformer designs
No full textThis paper studies the mutual information transfer characteristics of a novel iterative soft interference cancellation (SIC) aided beamforming receiver communicating over both additive white Gaussian noise (AWGN) and multipath slow fading channels. Based on the extrinsic information transfer (EXIT) chart technique, we investigate the convergence behavior of an iterative minimum bit error rate (MBER) multiuser detection (MUD) scheme as a function of both the system parameters and channel conditions in comparison to the SIC aided minimum mean square error (SIC-MMSE) MUD. Our simulation results show that the EXIT chart analysis is sufficiently accurate for the MBER MUD. Quantitatively, a two-antenna system was capable of supporting up to K=6 users at Eb/N0 = 3dB, even when their angular separation was relatively low, potentially below 20º. <br/
Zhongguo gu dai she sheng yang xing mi jue
No full textBen shu zhai lu le gu dai yi jia you guan fang shi she sheng bao jian fang mian de lun shu, bing zuo le dian xiao, zhu shi he an y
Semi-blind adaptive beamforming for high-throughput quadrature amplitude modulation systems
No full textA semi-blind adaptive beamforming scheme is proposed for wireless systems that employ high-throughput quadrature amplitude modulation signalling. A minimum number of training symbols, equal to the number of receiver antenna arrays elements, are first utilised to provide a rough initial least squares estimate of the beamformer's weight vector. A concurrent constant modulus algorithm and soft decision-directed scheme is then applied to adapt the beamformer. This semi-blind adaptive beamforming scheme is capable of converging fast to the minimum mean-square-error beamforming solution, as demonstrated in our simulation study
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