1,116 research outputs found
Hybrid Koopman C*-formalism and the hybrid quantum-classical master equation
Based on Koopman formalism for classical statistical mechanics, we propose a
formalism to define hybrid quantum-classical dynamical systems by defining
(outer) automorphisms of the C*-algebra of hybrid operators and realizing them
as linear transformations on the space of hybrid states. These hybrid states
are represented as density matrices on the Hilbert space obtained from the
hybrid C*-algebra by the GNS theorem. We also classify all possible dynamical
systems which are unitary and obtain the possible hybrid Hamiltonian operators.Comment: 20 page
Serum proteomics of active tuberculosis patients and contacts reveals unique processes activated during Mycobacterium tuberculosis infection.
Tuberculosis (TB) is the most lethal infection among infectious diseases. The specific aim of this study was to establish panels of serum protein biomarkers representative of active TB patients and their household contacts who were either infected (LTBI) or uninfected (EMI-TB Discovery Cohort, Pontevedra Region, Spain). A TMT (Tamdem mass tags) 10plex-based quantitative proteomics study was performed in quintuplicate containing a total of 15 individual serum samples per group. Peptides were analyzed in an LC-Orbitrap Elite platform, and raw data were processed using Proteome Discoverer 2.1. A total of 418 proteins were quantified. The specific protein signature of active TB patients was characterized by an accumulation of proteins related to complement activation, inflammation and modulation of immune response and also by a decrease of a small subset of proteins, including apolipoprotein A and serotransferrin, indicating the importance of lipid transport and iron assimilation in the progression of the disease. This signature was verified by the targeted measurement of selected candidates in a second cohort (EMI-TB Verification Cohort, Maputo Region, Mozambique) by ELISA and nephelometry techniques. These findings will aid our understanding of the complex metabolic processes associated with TB progression from LTBI to active disease
Emotional intelligence and aggressive behavior in sport. Can sports modality and hours of training infer?
El objetivo del presente estudio es comprobar si existe relación entre las horas semanales de entrenamiento, la inteligencia emocional (IE)
y la agresividad que manifiestan los deportistas. También se pretende conocer si es sexo, edad, cantidad de horas de entrenamiento y modalidad de
práctica (deportes individuales, de contacto o de no contacto), infieren en la inteligencia emocional y la agresividad. Los participantes en el estudio han
sido 472 deportistas españoles (n=235 varones y n=237 mujeres) pertenecientes a 22 clubs. Los resultados muestran que los deportistas que practican
deportes de no contacto tienen mayor capacidad para identificar y valorar emociones que los deportistas que practican deportes de contacto; los
practicantes de deportes de contacto, muestran mayores niveles de agresividad física o verbal, y hostilidad o ira, que los deportistas que practica deportes
individuales y de no contacto. En cuanto al sexo los hombres presentan mayores niveles de agresividad física o verbal que las mujeres. Los de menos edad
presentan mayores niveles de identificación y valoración emocional que los de media edad. Los de menor edad obtienen mayores puntuaciones que
agresividad física o verbal y hostilidad e ira que los de mayor edad. Los sujetos que menos tiempo dedican a la práctica deportiva tienen mayores niveles
de agresividad física o verbal que los que consumen más tiempo de entrenamiento. Los sujetos que tienen mayores niveles de agresividad física o verbal
tienen menor capacidad para valorar las emocionesThe objective of the present study is to verify if there is a relation between weekly hours of training, emotional intelligence (EI) and
aggressiveness that athletes show. It is also intended to know if gender, age, number of hours of training and practice modality (individual sports, contact
or non-contact) infer with emotional intelligence and aggression. The participants in the study were 472 Spanish athletes (n = 235 males and n = 237
females) belonging to 22 clubs. The results show that athletes who practice non-contact sports have a greater capacity to identify and value emotions
than athletes who practice contact sports; contact sports practitioners show higher levels of physical or verbal aggression and hostility or anger than
athletes who practice individual and non-contact sports. Regarding gender, men have higher levels of physical or verbal aggression than women. Youngaged
athletes have higher levels of identification and emotional assessment than those of middle age. Younger children obtain higher scores than
physical or verbal aggressiveness and hostility and anger than older ones. Subjects who spend less time in sports have higher levels of physical or verbal
aggression than those who spend more time training. Subjects who have higher levels of physical or verbal aggressiveness have less ability to assess
emotion
Quality Characteristics and Shelf-Life of Ultra-High Pressure Homogenized (UHPH) Almond Beverage
The effects of ultra-high-pressure homogenization (UHPH) at 200 MPa, in combination with different inlet temperatures (55 or 75 °C) during storage at 4 °C were studied and compared with pasteurized (90 °C, 90 s) almond beverage. Microbiological analysis of the physical (particle sedimentation and color) and volatile profile of the most relevant compound in almond beverages was performed at days 1, 7, 14, and 21 of cold storage. UHPH treatment 200 at 75 °C led to higher microbiological reduction after treatment and higher stability during cold storage in almond beverages than pasteurization or UHPH 200 at 55 °C. Physical characteristics of UHPH-treated samples exhibited a high stability during storage with a stable color. Volatile compounds extracted by solid phase microextraction were identified by gas chromatography coupled with mass spectrometry. The effect of UHPH treatment significantly (p < 0.05) affected the volatile profile compared with pasteurized beverages, although UHPH conditions applied produced similar effects in almond beverages. Benzaldehyde was the most abundant compound detected in all treatments. Hexanal was more abundant in UHPH-treated samples, indicating a higher lipid oxidation compared to pasteurized almond beverages
Regulators of sports commitment from the perspective of practitioners. Review and adaptation of the degree of commitment to sport (csq) scale in different sports modalities
El objetivo de este estudio ha sido comprobar las diferencias en el compromiso deportivo entre grupos de deportistas cuyas modalidades de práctica difieren en cuanto la interacción con los adversarios, y si para ello se puede aplicar con garantía de éxito la Escala de Grado de Compromiso hacia el Deporte (CSQ). Se ha comenzado realizando un análisis factorial sobre CSQ, y un MANOVA 2x4 (sexo x edades) para comprobar el efecto de estas variables en el compromiso deportivo. Han participado 472 deportistas, 49.8% varones y 50.2% mujeres. Los resultados evidencian la estructura bifactorial (compromiso actual y compromiso futuro) de la escala planteada por Orlick (2004) y validada en el contexto español con futbolistas adolescentes por Belando, Ferriz-Morell, y Moreno-Murcia (2012). Se ha comprobado que las horas de entrenamiento y la edad de los deportistas influye en el compromiso hacia el deporte, sin embargo, el sexo y la modalidad deportiva no es en ningún caso determinante.The objective of this study was to verify the differences that may exist in the sports commitment between groups of athletes whose practice modalities differ in the presence, or not, of interaction with opponents and if this can be applied with guarantee of success the Degree of Commitment to Sports (CSQ) Scale. A factorial analysis of CSQ has begun, followed by a MANOVA 2x4 (sex x ages) to verify the effect of these variables on sports commitment.
472 athletes participated, 49.8% males and 50.2% females. The results showed the bifactorial structure (current commitment and future commitment) of the scale proposed by Orlick (2004) and validated in the Spanish context with adolescent soccer players by Belando, Ferriz-Morell, and Moreno-Murcia (2012).
It has been verified that the hours of training and the age of the athletes influences the commitment to the sport, however the sex and the sport modality is not in any case determinant
Independent Component Analysis to Detect Clustered Microcalcification Breast Cancers
The presence of clustered microcalcifications is one of the earliest signs in breast cancer detection. Although there exist many studies broaching this problem, most of them are nonreproducible due to the use of proprietary image datasets. We use a known subset of the currently largest publicly available mammography database, the Digital Database for Screening Mammography (DDSM), to develop a computer-aided detection system that outperforms the
current reproducible studies on the same mammogram set. This proposal is mainly based on the use of extracted image features obtained by independent component analysis, but we also study the inclusion of the patient's age as a nonimage feature which requires no human expertise. Our system achieves an average of 2.55 false positives per image at a sensitivity of 81.8% and 4.45 at a sensitivity of 91.8% in diagnosing the BCRP_CALC_1 subset of DDSM
Two-neutron transfer in the 6 He + 120 Sn reaction
A large yield of
α
particles produced in the
120
Sn
(
6
He
,
α
)
reaction was measured at 20.3-, 22.2-, 22.4-, and 24.5-MeV bombarding energies. The
α
particles are distributed over a broad energy range in the vicinity and below the elastic scattering
6
He
peak. Energy integrated
α
-particle cross sections have been obtained at
θ
lab
=
36
∘
,
40
∘
, and
60
∘
. The
α
energy distributions have been analyzed at a fixed laboratory angle
(
≈
60
∘
)
in terms of the reaction
Q
value, considering the
2
n
-transfer reaction kinematics
120
Sn
(
6
He
,
α
)
122
Sn
. A kinematical analysis of the
Q
-value distribution shows that the recoil system
120
Sn
+
2
n
is formed in highly excited states in the continuum, at increasing excitation energies as the bombarding energy increases. It is shown that by using Brink's formula, the excitation energy depends on the transferred angular momentum following a linear relation with the square of the angular momentum, indicating that some kind of dinuclear rotating system is formed after the reaction.Conselho Nacional de Desenvolvimento Científico e Tecnológico-CNPq/MCTI de Brasil y Fundação de Amparo à Pesquisa do Estado de São Paulo. Brasil–FAPESP. 2013/22100-7 y 2014/19666-1VI Plan Propio de Investigación de la Universidad de Sevilla (2017-2018
Asociaciones de moluscos de fondos sedimentarios circalitorales y batiales del norte del mar de Alborán
Molluscan assemblages from shelf and slope soft bottoms of the Alboran Sea have been
sampled with a beam trawl during 2014 and 2015 MEDITS expeditions. A total of 134 spp. of
molluscs (shell size > 3 mm) were identified, being gastropods the most diverse and dominant group.
Four main depth related assemblages were detected in multivariate analyses and characterized by
(1) Turritella communis, Chamelea striatula and Nucula sulcata for the inner shelf, (2) Timoclea
ovata, Clelandella miliaris and Neopycnodonte cochlear for the outer shelf, (3) Nassarius ovoideus,
Calumbonella suturale and N. sulcata for the upper slope and (4) Abra longicallus, Euspira fusca and
Aporrhais serresianus for the middle slope. Species richness and abundance decreased with depth,
unlike evenness and Shannon-Wiener diversity which displayed an opposite pattern. A higher spatial
variability was detected for the shelf, indicating that more assemblages may occur at this level and
further sampling is needed for covering all sedimentary habitat types of the Alboran Sea.Versión del edito
Elastic scattering, inelastic excitation, and 1 n pick-up transfer cross sections for 10 B + 120 Sn at energies near the Coulomb barrier
The
10
B
+
120
Sn
reaction has been systematically studied at laboratory energies around the Coulomb barrier:
E
LAB
=
31.5
, 33.5, 35.0, and 37.5 MeV. Cross sections for the elastic scattering and some reaction processes have been measured: excitation to the
1
+
state of
10
B
; excitation to the
2
+
and
3
−
states of
120
Sn
; and the one-neutron pick-up transfer
120
Sn
(
10
B
,
11
B
)
119
Sn
. Coupled reaction channel (CRC) calculations have been performed in the context of the double-folding São Paulo potential. The theoretical calculations result in a good overall description of the experimental angular distributions. The effect on the theoretical elastic-scattering angular distributions of couplings to the inelastic and transfer states (through the CRC calculations) and to the continuum states (through continuum-discretized coupled-channels calculations) has been investigated.Instituto Nacional de Ciência e Tecnologia–Física Nuclear e Aplicações (INCT-FNA) 464898/2014-5Ministerio de Economía y Competitividad de España y el Fondo Europeo de Desarrollo Regional (FEDER) FIS2014-51941-P,Junta de Andalucía. FQM-160Programa de investigación e innovación de la Unión Europea Horizonte 2020. 65400
Extractive Text-Based Summarization of Arabic videos: Issues, Approaches and Evaluations
International audienceIn this paper, we present and evaluate a method for extractive text-based summarization of Arabic videos. The algorithm is proposed in the scope of the AMIS project that aims at helping a user to understand videos given in a foreign language (Arabic). For that, the project proposes several strategies to translate and summarize the videos. One of them consists in transcribing the Ara-bic videos, summarizing the transcriptions, and translating the summary. In this paper we describe the video corpus that was collected from YouTube and present and evaluate the transcription-summarization part of this strategy. Moreover, we present the Automatic Speech Recognition (ASR) system used to transcribe the videos, and show how we adapted this system to the Algerian dialect. Then, we describe how we automatically segment into sentences the sequence of words provided by the ASR system, and how we summarize the obtained sequence of sentences. We evaluate objectively and subjectively our approach. Results show that the ASR system performs well in terms of Word Error Rate on MSA, but needs to be adapted for dealing with Algerian dialect data. The subjective evaluation shows the same behaviour than ASR: transcriptions for videos containing dialectal data were better scored than videos containing only MSA data. However, summaries based on transcriptions are not as well rated, even when transcriptions are better rated. Last, the study shows that features, such as the lengths of transcriptions and summaries, and the subjective score of transcriptions, explain only 31% of the subjective score of summaries
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