1,721,003 research outputs found
Dynamic distributed clustering in wireless sensor networks via Voronoi tessellation control
No full textConstrained Control of Linear Discrete-Time Systems under Quartic Performance Criterion
Full text linkIn several applications, a performance criterion that is quartic in the state can be a desired alternative to the classic quadratic control. This letter proposes a receding horizon controller for linear time-invariant systems subject to linear state and input constraints, which makes use of a running cost that is quadratic in the input and quartic in the state. Stability and recursive feasibility of the proposed receding horizon scheme are proven. Numerical simulations are presented, considering the problem of controlling a single-link inverted pendulum on a cart.SCOPUS: ar.jinfo:eu-repo/semantics/publishe
A New Low Temperature Pyrometer for Measuring the Forehead Skin
No full textA New Low Temperature Pyrometer for Measuring the Forehead Ski
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Fine needle aspiration biopsy diagnosis of a bone metastasis from an occult carcinoma of the liver. A case report
No full textIn a 66-year-old male, fine needle aspiration biopsy (FNAB) of an osteolytic vertebral lesion determined the diagnosis of a liver cell carcinoma, until then clinically silent. FNAB confirmed the diagnosis of the tumor and the identification of the primary site without resorting to surgery
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
A Simple Lossless Compression Heuristic for Grey Scale Images
No full textIn this paper, we show a simple lossless compression heuristic for gray scale images. The main advantage of this approach is that it provides a highly parallelizable compressor and decompressor. In fact, it can be applied independently to each block of 8x8 pixels, achieving 80 percent of the compression obtained with LOCO-I (JPEG-LS), the current lossless standard in low-complexity applications. The compressed form of each block employs a header and a fixed length code, and the sequential implementations of the encoder and decoder are 50 to 60 percent faster than LOCO-I
Il telescopio spaziale AstroSat-Skywave (UAI-AMSAT): studio di fattibilità dell'osservatorio FLAVIO
No full textOn-going feasibility study of a spaceborne high performance telescope dubbed AstroSat-SkyWave proposed by the Unione Astrofili Italiani (UAI) and the Radio Amateur Satellite Corporation-Italia (AMSAT-IT). A quite compact Houghton-Cassegrain-derived configuration with a 250 mm mirror, f/3.6 named FLAVIO. Mission Goals: photometry,imaging and spectrometr
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