481 research outputs found
3-Hydroxy-5,5-dimethyl-2-(2-oxopropyl)cyclohex-2-enone
The title compound, C11H16O3, was obtained by reaction of dimedone, 5,5-dimethylcyclohexane-1,3-dione, and α-chloroacetone. The cyclohexenone ring exhibits an envelope conformation with puckering amplitudes Q = 0.433 (2) and Φ = −109.0 (3)°. The 2-oxopropyl fragment is almost perpendicular to the cyclohexanone ring [dihedral angle = 77.72 (8)°]. In the crystal, the molecules are linked to each other through O—H⋯O hydrogen bonding, building a chain parallel to the b axis
Coloración atípica en una hembra de Iberolacerta cyreni en la Sierra de Guadarrama (Madrid)
El trabajo se financió por
el proyecto MICIIN-CGL2011-24150/BOSPeer reviewe
Revisión de la distribución y abundancia de la herpetofauna en las Islas Chafarinas: datos históricos vs. tendencias poblacionales
El estudio fue financiado por contratos
del Organismo Autónomo de Parques NacionalesPeer reviewe
Dyslexia Diagnosis by EEG Temporal and Spectral Descriptors: An Anomaly Detection Approach.
Diagnosis of learning difficulties is a challenging goal. There are huge number of factors involved in the evaluation procedure that present high variance among the population with the same difficulty. Diagnosis is usually performed by scoring subjects according to results obtained in different neuropsychological (performance-based) tests specifically designed to this end. One of the most frequent disorders is developmental dyslexia (DD), a specific difficulty in the acquisition of reading skills not related to mental age or inadequate schooling. Its prevalence is estimated between 5% and 12% of the population. Traditional tests for DD diagnosis aim to measure different behavioral variables involved in the reading process. In this paper, we propose a diagnostic method not based on behavioral variables but on involuntary neurophysiological responses to different auditory stimuli. The experiments performed use electroencephalography (EEG) signals to analyze the temporal behavior and the spectral content of the signal acquired from each electrode to extract relevant (temporal and spectral) features. Moreover, the relationship of the features extracted among electrodes allows to infer a connectivity-like model showing brain areas that process auditory stimuli in a synchronized way. Then an anomaly detection system based on the reconstruction residuals of an autoencoder using these features has been proposed. Hence, classification is performed by the proposed system based on the differences in the resulting connectivity models that have demonstrated to be a useful tool for differential diagnosis of DD as well as a method to step towards gaining a better knowledge of the brain processes involved in DD.This work was partly supported by the MINECO/FEDER under PGC2018-098813-B-C31, PGC2018-098813-B-C32 and PSI2015-65848-R projects. We gratefully acknowledge the support of NVIDIA Corporation with the donation of one of the GPUs used for this research. Work by F.J.M.M. was supported by the MICINN “Juan de la Cierva - Formaci´on” Fellowship. We also thank the Leeduca research group and Junta de Andaluc´ıa for the data supplied and the support
Quantum Noise Limits for Nonlinear, Phase-Invariant Amplifiers
Any quantum device that amplifies coherent states of a field while preserving
their phase generates noise. A nonlinear, phase-invariant amplifier may
generate less noise, over a range of input field strengths, than any linear
amplifier with the same amplification. We present explicit examples of such
nonlinear amplifiers, and derive lower bounds on the noise generated by a
nonlinear, phase-invariant quantum amplifier.Comment: RevTeX, 6 pages + 4 figures (included in file; hard copy sent on
request
Long-Term Measurement of Piglet Activity Using Passive Infrared Detectors
Measuring animal activity is useful for monitoring animal welfare in real time. In this regard, passive infrared detectors have been used in recent years to quantify piglet activity because of their robustness and ease of use. This study was conducted on a commercial farm in Northwest Spain during six complete breeding cycles. The hourly average activity of weaned piglets with a body mass of 6–20 kg was recorded and further analyzed by using a multiplicative decomposition of the series followed by a wavelet analysis. Finally, the real series were compared to the theoretical models of activity. Results showed a high level of movement immediately after weaning and a sustained level of activity throughout the cycles. The daily behavior of the piglets followed a clear circadian pattern with several peaks of activity. No differences in behavior were observed between spring–summer cycles and autumn–winter cycles. Single-peak models achieved the best predictive results. In addition, the installed sensors were found to underestimate mild activityThis research was funded by Consellería de Educación, Universidade e Formación Profesional and Consellería de Economía, Emprego e Industria da Xunta de Galicia, grant number ED431B 2018/12-GPCS
La influencia de Suárez en la configuración de un nuevo orden económico. Elementos para un debate sobre la génesis de la teoría económica moderna
El presente artículo realiza una aproximación general a la filosofía de Francisco Suárez, considerado por muchos el canal principal a través del cual se transmitió al pensamiento moderno la filosofía de Escoto y Ockham, con el objeto de mostrar la relevancia de sus aportaciones para la configuración de la economía moderna. El esfuerzo de Suárez para poner fin a los problemas políticos del siglo XVI, fundamentado en la idea de “naturaleza pura”, propició – aunque no intencionalmente– un enfoque secular, dando lugar a una concepción racionalista y estática de la ley, con importantes consecuencias en la configuración del nuevo orden social y político. Contrastando de manera sintética y general este original enfoque con el de Tomás de Aquino, al que consideramos el principal exponente del paradigma clásico, pretendemos mostrar su influencia en la génesis de la teoría económica moderna.This paper takes a general approach to the philosophy of Francisco Suarez in order to show the importance of his contributions to the configuration of modern economics. Indeed many consider Suárez to be the main channel through which Duns Scotus and William of Ockham´s philosophy was transmitted to modern thought. Although not intentionally, Suárez’s effort to end the political problems of the sixteenth century, based on the idea of “pure nature”, led to a secular conception of the world, which resulted in a rationalist and static conception of law with important consequences in shaping the new social and political order. Herein, we contrast this original approach with that of Thomas Aquinas, who we consider the leading exponent of the classical paradigm, to demonstrate the influence Suárez had on the genesis of modern economic theory
Una visión antropológica de la innovación económica
This article examines on the foundations of innovation in economic and business theory. After a brief review of the main problems that econo- mic theory faces in its attempt to fit innovation into its mechanical and biologist models, the need for a more robust epistemology and anthropology comes to light for understanding the practical character of human action and its free and social nature. To this end, we undertake an anthropological approach to quintessentially human manifestations –language and working order to recover the meaning of innovation and overcome its tension with tradition, which is an expression of the struggle that occurs between nature and history when using a reductive theory of knowledge and a false anthropology.El presente artículo reflexiona sobre los fundamentos del fenómeno de la innovación en la economía y en la empresa. Tras un breve recorrido por los principales inconvenientes con que se topó la teoría económica en su intento por dar cabida a la innovación en sus modelos de corte mecánico o biologicista, se pone de manifiesto la necesidad de una epistemología y antropología más robustas para comprender el carácter práctico de la acción humana y su naturaleza comunitaria y libre. A tal fin se realiza una aproximación antropológica a las principales manifestaciones humanas culturales –el lenguaje y el trabajo– para recuperar el sentido de la innovación y superar la tensión con la tradición, expresión de la pugna que se produce entre naturaleza e historia cuando se adoptan una teoría del conocimiento reductiva y una antropología falsa
RDF query and protocols language using for description and representation of web ontologies
The purpose of this article is to expose the metadata structure based on RDF (Resource Description Framework) and the way in which queries can be made using SPARQL (Protocol and RDF Query Language), as a principle for searching the Semantic Web. It also describes what must be considered to build a Web Ontology and the tools that can help the Software developer to make querys using SPARQL
New Fertilizer Strategies Combining Manure and Urea for Improved Rice Growth in Mozambique
The cost of chemical fertilizers is increasing and becoming unaffordable for smallholders
in Africa. The present study aimed to assess the impact of combined fertilization strategies using
urea and animal manure (beef cattle manure and poultry litter manure) on rice yield and nutrient
uptake. For this, a field experiment was carried out on a loam sandy soil in the Chókwè Irrigation
Scheme. We set seven treatments in a Randomized Complete Block Design (RCBD), namely: T0: no
fertilizer, T1: 100% urea, T2: 100% beef cattle manure, T3: 100% poultry litter, T4: 50% urea + 50% beef
cattle manure, T5: 50% urea + 50% poultry litter and T6: 40% urea + 30% beef cattle manure + 30%
poultry litter, replicated four times each. All treatments, except T0, received an amount of nitrogen
(N) equivalent to 100 kgN ha1. Results revealed that the highest yield grain (425 g m2), plant
height (115 cm), number of tillers (18) and thousand-grain weight (34g) were observed in treatments
combining urea with manure (T4, T5 and T6) indicating that N supply in the mixture (urea + manure)
is more efficient than in isolated applications of N (T1, T2 and T3). The data obtained in this study
suggest that a combination of fertilizers (T6) lead to competitive yields and is thus recommended for
best soil management practicesinfo:eu-repo/semantics/publishedVersio
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