repositories = "Archivo Digital UPM"

Encontrado 30,802 documentos, página mostrada 1 de 3081

Optimization and evaluation in space conditions of multi-GHz optical modulators

Description: Among the different optical modulator technologies available such as polymer, III-V semiconductors, Silicon, the well-known Lithium Niobate (LN) offers the best trade-off in terms of performances, ease of use, and power handling capability [1-9]. The LN technology is still widely deployed within the...
Language(s): Inglés

Cognitive test-bed for wireless sensor networks

Description: Cognitive Wireless Sensor Networks are an emerging technology with a vast potential to avoid traditional wireless problems such as reliability, interferences and spectrum scarcity in Wireless Sensor Networks. Cognitive Wireless Sensor Networks test-beds are an important tool for future developments,...
Language(s): Inglés

Silicon micromachined waveguide components at 0.75 to 1.1 THz

Description: Silicon micromachined waveguide components operating in the WM-250 (WR-1) waveguide band (0.75 to 1.1 THz) are measured. Through lines are used to characterize the waveguide loss with and without an oxide etch to reduce the surface roughness. A sidewall roughness of 100nm is achieved, enabling a wav...
Language(s): Catalán

Novel dual-band single circular polarization antenna feeding network for satellite communications

Description: In this paper a novel dual-band single circular polarization antenna feeding network for satellite communications is presented. The novel antenna feed chain1 is composed of two elements or subsystems, namely a diplexer and a bi-phase polarizer. In comparison with the classic topology based on an ort...
Language(s): Inglés

A perceptive insight into cities patterns by visualizing urban economies

Description: Urban economic activities are an essential facet in defining city identity. Traditional approaches rely very often on the most theoretical and quantitative features of the studies, excluding de-facto a direct association between those findings and the tangible subject of the analysis. To fill the ga...
Language(s): Inglés

Insertion of impairments in test video sequences for quality assessment based on psychovisual characteristics

Description: Assessing video quality is a complex task. While most pixel-based metrics do not present enough correlation between objective and subjective results, algorithms need to correspond to human perception when analyzing quality in a video sequence. For analyzing the perceived quality derived from concret...
Language(s): Inglés

Data consistency management in an open smart home management platform

Description: In this paper, the authors introduce a novel mechanism for data management in a middleware for smart home control, where a relational database and semantic ontology storage are used at the same time in a Data Warehouse. An annotation system has been designed for instructing the storage format and lo...
Language(s): Inglés

Parameter-based mechanism for unifying user interaction, applications and communication protocols

Description: In the smart building control industry, creating a platform to integrate different communication protocols and ease the interaction between users and devices is becoming increasingly important. BATMP is a platform designed to achieve this goal. In this paper, the authors describe a novel mechanism f...
Language(s): Inglés

Conditions for perfect focusing multiple point sources with the SMS design method

Description: In this work, we demonstrate how it is possible to sharply image multiple object points. The Simultaneous Multiple Surface (SMS) design method has usually been presented as a method to couple N wave-front pairs with N surfaces, but recent findings show that when using N surfaces, we can obtain M ima...
Language(s): Inglés

Encontrado 30,802 documentos, página mostrada 1 de 3081

Uso de cookies: Este sitio web utiliza cookies propias y de terceros para dar un mejor servicio. Si continúa navegando se considera que acepta su uso. OKMás información