Search results for "DEB"
showing 10 items of 1307 documents
Zvaigžņotā Debess: 2017, Pavasaris (235)
2017
Contents: “ZVAIGŽŅOTĀ DEBESS” FORTY YEARS AGO: E.Mūkins. Clouds of Venus: Structure and Composition (abridged) ; J.Miezis. 3rd All-union Young Astronomers Gathering (abridged) ; DEVELOPMENTS in SCIENCE: K.Schwartz. New Discoveries in the Milky Way ; DISCOVERIES: I.Eglītis. Small Planets Get Latvian Names ; I.Pundure. Earth-mass World Revealed around Proxima Centauri ; SPACE RESEARCH and EXPLORATION: J.Jaunbergs. Mysteries of Saturn’s Clouds ; A.Slavinskis. Contribution of Estonian Student Satellite Programme ESTCube to Largest Challenges for Humanity ; R.Misa. Impossible Engine that Is likely Possible ; I.Pundure. ESO VLT to Search for Planets in Alpha Centauri System ; EARTH and COSMOS: J.…
Anomalous temperature dependence of the IR spectrum of polyalanine
1997
Abstract We have studied the temperature dependence of the infrared spectra of acetanilide (ACN), tryptophan–(alanine) 15 , and tyrosine–(alanine) 15 . No sidebands of the amide-I vibration were observed in the polypeptides, but two anomalous sidebands of the NH stretch with a similar temperature dependence as that of the anomalous amide-I vibrational mode at 1650 cm −1 of crystalline ACN were detected. Fermi resonance combined with the appearance of a red-shifted sideband of NH stretch through coupling to lattice modes seems to explain this band structure. Observations are indicative of excitons that may occur in polypeptides as well as in single crystals of ACN.
Fonti, suggestioni e intersezioni classiche, tardoantiche e medievali nell’«Alda» di Guglielmo di Blois
2019
In questo saggio vengono studiate le fonti classiche, tardoantiche e medievali dell’«Alda», commedia elegiaca latina di Guglielmo di Blois (scritta verso il 1169-1170). In particolare, dopo una presentazione generale dell’opera e una rassegna critica degli studi e delle edizioni, ci si sofferma sulle suggestioni attinte a Terenzio, Virgilio, Orazio, Ovidio, Stazio, all’«Aegritudo Perdicae», Massimiano, Boezio, Ildeberto di Lavardin, ad alcune commedie elegiache del sec. XII (il «Geta» e l’«Aulularia» di Vitale di Blois, il «Pamphilus», la «Lidia» di Arnolfo d’Orléans) e alla tradizione novellistica “orientale” («Mischle Sendebar»). This essay is founded on the classical, late and medieval s…
Comparative analysis of acoustic emission signals generated by electrical discharges measured by the hydrophone and the wideband contact transducer
2005
The paper presents a comparative analysis of the acoustic emission (AE) pulses and signals generated by PDs. For this purpose the measurements of the acoustic emission signals generated by PDs were taken in the multipoint-plane system using a hydrophone placed directly in the area of discharge generation, and the AE pulses using a piezoelectric contact transducer which was on a side wall of a power transformer tub. Next, time runs and amplitude density spectra were drawn. Also the descriptors describing signals in the frequency domain were determined and the time-frequency analysis was carried out, which determined spectrograms for the energy density spectrum.
Presence of plastic particles in waterbirds faeces collected in Spanish lakes
2017
Plastic intake by marine vertebrates has been widely reported, but information about its presence in continental waterfowl is scarce. Here we analyzed faeces of waterbirds species (European coot, Fulica atra, mallard, Anas platyrhynchos and shelduck, Tadorna tadorna) for plastic debris in five wetlands in Central Spain. We collected 89 faeces of shelduck distributed in four lakes, 43.8% of them presented plastic remnants. Sixty percent of 10 faeces of European coot and 45% of 40 faeces of mallard contained plastic debris. Plastic debris found was of two types, threads and fragments, and were identified as remnants of plastic objects used in agricultural fields surrounding the lakes. Differe…
Toxic Theisms? New Strategies for Prebunking Religious Belief-Behaviour Complexes
2020
This article offers a brief epidemiological analysis and description of some of the main cognitive (and coalitional) biases that can facilitate the emergence and enable the maintenance of a broad category of toxic traditions, which will be referred to here as “religious” belief-behaviour complexes (BBCs) or “theisms”. I argue that such BBCs played an “adaptive” role in the Upper Paleolithic and have continued to “work” throughout most of human history by enhancing the species’ capacity for material production and promoting its biological reproduction. However, today the theist credulity and conformity biases that surreptitiously shape these kinds of social assemblages have now becom…
The effects of forest management on wood-inhabiting fungi occupying dead wood of different diameter fractions
2014
Forest management has caused severe ecological degradation throughout the Globe. One of its most prominent consequences is the drastic change in dead wood profile and consequently in the dead wood dependent biota. Wood-inhabiting fungi are, considering ecosystem functions, the most important species group utilizing dead wood, because they take care of majority of the decaying process. The earlier research focusing on the effects of forest management on wood-inhabiting fungi has strongly focused on large dead wood pieces (i.e. coarse woody debris, CWD), even though it has been shown that a major part of fungal diversity utilizes (also) small dead wood pieces (i.e. [very] fine woody debris, […
Hop: Histogram of patterns for human action representation
2017
This paper presents a novel method for representing actions in terms of multinomial distributions of frequent sequential patterns of different length. Frequent sequential patterns are series of data descriptors that occur many times in the data. This paper proposes to learn a codebook of frequent sequential patterns by means of an apriori-like algorithm, and to represent an action with a Bag-of-Frequent-Sequential-Patterns approach. Preliminary experiments of the proposed method have been conducted for action classification on skeletal data. The method achieves state-of-the-art accuracy value in cross-subject validation.
Qüestions sòcio-científiques i debats per a millorar l'argumentació en classes de Física i Química
2017
En aquesta investigació s’estudia l’ús de les qüestions sòcio-científiques i els debats per a millorar l’argumentació a les classes de Física i Química. Els problemes que s’aborden al llarg de l’estudi són: Quines habilitats argumentatives en ciència tenen els alumnes d’ESO i Batxillerat? En quina mesura l’ensenyament tradicional de la Física i Química potencia l’habilitat argumentativa dels alumnes? Pot la realització de debats sòcio-científics millorar aquesta habilitat? Per a donar resposta a les dos primeres preguntes a manera de diagnòstic es proposa la següent primera hipòtesi: Els alumnes de Secundària tenen un baix nivell d’habilitat argumentativa perquè l’argumentació és un procedi…
Space-charge relaxation in perovskites.
1994
We report a dielectric anomaly in several perovskites at intermediate frequencies 10\ensuremath{\le}f\ensuremath{\le}${10}^{7}$ Hz in the temperature range 400 \ifmmode^\circ\else\textdegree\fi{}C \ensuremath{\le}T\ensuremath{\le}800 \ifmmode^\circ\else\textdegree\fi{}C. We have found this dielectric maximum in more than 100 samples of various shapes and textures. This anomaly is shown to arise from a Debye dielectric dispersion that slows down following an Arrhenius law. We have established a link between this dielectric relaxation and the conductivity. We propose that it can be achieved through a space-charge model that quantitatively agrees with the experimental results in the lower temp…