132 research outputs found
Entre revolución y contrarrevolución : el nacimiento de una cultura política nacional en la Italia de Napoleón
No full textFat Brane Phenomena
No full textGravitons could permeate extra space dimensions inaccessible to all other particles, which would be confined to ``branes''. We point out that these branes could be ``fat'' and have a non-vanishing width in the dimensions reserved for gravitons. In this case the other particles, confined within a finite width, should have ``branon'' excitations. Chiral fermions behave differently from bosons under dimensional reduction, and they may --or may not-- be more localized than bosons. All these possibilities are in principle testable and distinguishable, they could yield spectacular signatures at colliders, such as the production of the first branon excitation of 's or 's, decaying into their ground state plus a quasi-continuum of graviton recurrences. We explore these ideas in the realm of a future lepton collider and we individuate a {\it dimensiometer}: an observable that would cleanly diagnose the number of large ``extra'' dimensions.Gravitons could permeate extra space dimensions inaccessible to all other particles, which would be confined to ``branes''. We point out that these branes could be ``fat'' and have a non-vanishing width in the dimensions reserved for gravitons. In this case the other particles, confined within a finite width, should have ``branon'' excitations. Chiral fermions behave differently from bosons under dimensional reduction, and they may --or may not-- be more localized than bosons. All these possibilities are in principle testable and distinguishable, they could yield spectacular signatures at colliders, such as the production of the first branon excitation of 's or 's, decaying into their ground state plus a quasi-continuum of graviton recurrences. We explore these ideas in the realm of a future lepton collider and we individuate a {\it dimensiometer}: an observable that would cleanly diagnose the number of large ``extra'' dimensions.Gravitons could permeate extra space dimensions inaccessible to all other particles, which would be confined to “branes”. We point out that these branes could be “fat” and have a non-vanishing width in the dimensions reserved for gravitons. In this case the other particles, confined within a finite width, should have “branon” excitations. Chiral fermions behave differently from bosons under dimensional reduction, and they may – or may not – be more localized than bosons. All these possibilities are in principle testable and distinguishable, they could yield spectacular signatures at colliders, such as the production of the first branon excitation of γ 's or Z 's, decaying into their ground state plus a quasi-continuum of graviton recurrences. We explore these ideas in the realm of a future lepton collider and we individuate a dimensiometer : an observable that would cleanly diagnose the number of large “extra” dimensions
Perturbative vs. non-perturbative scaling violation in quark fragmentation
No full textEngels J, Dabkowski J, Schilling K. Perturbative vs. non-perturbative scaling violation in quark fragmentation. Zeitschrift für Physik, C : particles and fields. 1980;3(4):371-376.We investigate the approach to scaling for non-perturbative quark fragmentation in the frame-work of the uncorrelated jet model. It is found that subasymptotic kinematic scale breaking is comparable in size to scaling violations from hard gluon emission a la QCD. Experimental data available at present do allow for such non-perturbative scale breaking effects
A singular man : Festschrift Sakharov (Andrej Dmitrievich) on his 63rd birthday
No full textThe speaker, A. de RUJULA, will remind the audience of aspects of the work, the principles and the humor of A. SACHAROV
Avantprojecte de plantacio de 12 ha de vinyes al terme municipal de Casserres
No full textThe following project studies the feasibility of setting up a vineyard on a farmhouse located in Casserres, a village from Bergueda (Barcelona), with the aim to choose the best plant material and carry out the optimum soil management. To achieve it, the climatic and edaphic characteristic of the plot have been studied: the climatological indexes show that the fields could suffer early frosts and the vineyard would probably be exposed to fungal diseases, while the soil sampling indicates that it is calcareous, it has an overhead pH and it presents, mostly, a sandy-loam texture. This results determine that Parellada, Merlot, Sira and Ull de Llebre varieties, with a R-110 and 161-49C rootstock, become the chosen ones and the best adapted to conditions. Regarding the conduction system, it is recommended to install trellis and form a double Royat. Consequently, the ventilation and insolation become optimum and the incidence of fungal diseases decreases. About the soil management, it is proposed to apply a cover crop to reduce the erosion and control the evapotranspiration; in this way, the consequences mentioned would be mitigated. In sum, the implantation of any crop has to be previously studied to take out the maximum profit from the agronomic decisions.El present projecte estudia la viabilitat d’implantar un vinyar en una masia de la localitat de Casserres, un poble de la comarca del Bergueda (Barcelona), amb l’objectiu d’escollir la materia vegetal mes adequada i dur a terme la gestio del sol mes optima. Per aconseguir-ho, s’han tingut en compte les caracteristiques climatologiques i edafiques de la parcel·la: els indexs climatologics estudiats mostren que la finca pateix gelades primerenques i que la vinya estaria exposada a una alta probabilitat de patir malalties fungiques, mentre que el mostreig que s’ha fet del sol indica que aquest es calcari, que te un pH elevat i que presenta, majoritariament, una textura franco-arenosa. A partir d’aquests resultats es determina que les varietats Parellada, Merlot, Sira i Ull de Llebre, amb els peus R-110 i 161-49C, esdevenen el material escollit i millor adaptat per a les condicions. Respecte al tutoratge es recomana instal·lar una espatllera i formar un cordo Royat doble, ja que aixi s’obtenen una ventilacio i una insolacio optimes i es redueix la incidencia de malalties criptogamiques. Pel que fa a la gestio del sol, es proposa aplicar una coberta vegetal que s’encarregara, principalment, de reduir l’erosio i controlar l’evapotranspiracio; d’aquesta manera s’aconsegueix atenuar les consequencies dels factors limitants esmentats. En resum, la implantacio de qualsevol cultiu ha de ser previament estudiada per treure’n el maxim profit a partir de la presa de decisions agronomiques mes adients.El presente proyecto estudia la viabilidad de implantar un viñedo en una masia de la localidad de Casserres, un pueblo de la comarca del Bergueda (Barcelona), con el objetivo de escoger la materia vegetal mas adecuada y llevar a cabo la gestion del suelo mas optima. Para conseguirlo, se han tenido en cuenta las caracteristicas climatologicas y edaficas de la parcela: los indices climatologicos estudiados muestran que la finca sufre heladas tempranas y que la viña estaria expuesta a una alta probabilidad de sufrir enfermedades fungicas, mientras que el muestreo que se ha hecho del suelo indica que este es calcareo, que tiene un pH elevado y que presenta, mayoritariamente, una textura franco-arenosa. A partir de estos resultados se determina que las variedades Parellada, Merlot, Sira y Tempranillo, con los pies R-110 y 161-49C, acontecen el material escogido y mejor adaptado para las condiciones. Respecto al sistema de conduccion, se recomienda instalar una espaldera y formar un cordon Royat doble obteniendo; de esta forma se consiguen una ventilacion y una insolacion optimas y se reduce la incidencia de enfermedades fungicas. En cuanto a la gestion del suelo, se propone aplicar una cubierta vegetal que se encargara, principalmente, de reducir la erosion y controlar la evapotranspiracion; de este modo se consigue atenuar las consecuencias de los factores limitantes mencionados. En resumen, la implantacion de cualquier cultivo tiene que ser previamente estudiada para sacar el maximo provecho a partir de la toma de decisiones agronomicas mas adecuadas
Avantprojecte de plantacio de 12 ha de vinyes al terme municipal de Casserres
No full textThe following project studies the feasibility of setting up a vineyard on a farmhouse located in Casserres, a village from Bergueda (Barcelona), with the aim to choose the best plant material and carry out the optimum soil management. To achieve it, the climatic and edaphic characteristic of the plot have been studied: the climatological indexes show that the fields could suffer early frosts and the vineyard would probably be exposed to fungal diseases, while the soil sampling indicates that it is calcareous, it has an overhead pH and it presents, mostly, a sandy-loam texture. This results determine that Parellada, Merlot, Sira and Ull de Llebre varieties, with a R-110 and 161-49C rootstock, become the chosen ones and the best adapted to conditions. Regarding the conduction system, it is recommended to install trellis and form a double Royat. Consequently, the ventilation and insolation become optimum and the incidence of fungal diseases decreases. About the soil management, it is proposed to apply a cover crop to reduce the erosion and control the evapotranspiration; in this way, the consequences mentioned would be mitigated. In sum, the implantation of any crop has to be previously studied to take out the maximum profit from the agronomic decisions.El present projecte estudia la viabilitat d’implantar un vinyar en una masia de la localitat de Casserres, un poble de la comarca del Bergueda (Barcelona), amb l’objectiu d’escollir la materia vegetal mes adequada i dur a terme la gestio del sol mes optima. Per aconseguir-ho, s’han tingut en compte les caracteristiques climatologiques i edafiques de la parcel·la: els indexs climatologics estudiats mostren que la finca pateix gelades primerenques i que la vinya estaria exposada a una alta probabilitat de patir malalties fungiques, mentre que el mostreig que s’ha fet del sol indica que aquest es calcari, que te un pH elevat i que presenta, majoritariament, una textura franco-arenosa. A partir d’aquests resultats es determina que les varietats Parellada, Merlot, Sira i Ull de Llebre, amb els peus R-110 i 161-49C, esdevenen el material escollit i millor adaptat per a les condicions. Respecte al tutoratge es recomana instal·lar una espatllera i formar un cordo Royat doble, ja que aixi s’obtenen una ventilacio i una insolacio optimes i es redueix la incidencia de malalties criptogamiques. Pel que fa a la gestio del sol, es proposa aplicar una coberta vegetal que s’encarregara, principalment, de reduir l’erosio i controlar l’evapotranspiracio; d’aquesta manera s’aconsegueix atenuar les consequencies dels factors limitants esmentats. En resum, la implantacio de qualsevol cultiu ha de ser previament estudiada per treure’n el maxim profit a partir de la presa de decisions agronomiques mes adients.El presente proyecto estudia la viabilidad de implantar un viñedo en una masia de la localidad de Casserres, un pueblo de la comarca del Bergueda (Barcelona), con el objetivo de escoger la materia vegetal mas adecuada y llevar a cabo la gestion del suelo mas optima. Para conseguirlo, se han tenido en cuenta las caracteristicas climatologicas y edaficas de la parcela: los indices climatologicos estudiados muestran que la finca sufre heladas tempranas y que la viña estaria expuesta a una alta probabilidad de sufrir enfermedades fungicas, mientras que el muestreo que se ha hecho del suelo indica que este es calcareo, que tiene un pH elevado y que presenta, mayoritariamente, una textura franco-arenosa. A partir de estos resultados se determina que las variedades Parellada, Merlot, Sira y Tempranillo, con los pies R-110 y 161-49C, acontecen el material escogido y mejor adaptado para las condiciones. Respecto al sistema de conduccion, se recomienda instalar una espaldera y formar un cordon Royat doble obteniendo; de esta forma se consiguen una ventilacion y una insolacion optimas y se reduce la incidencia de enfermedades fungicas. En cuanto a la gestion del suelo, se propone aplicar una cubierta vegetal que se encargara, principalmente, de reducir la erosion y controlar la evapotranspiracion; de este modo se consigue atenuar las consecuencias de los factores limitantes mencionados. En resumen, la implantacion de cualquier cultivo tiene que ser previamente estudiada para sacar el maximo provecho a partir de la toma de decisiones agronomicas mas adecuadas
A solution of a hoary conundrum: the origin and properties of cosmic rays
No full textI discuss a theory of non-solar cosmic rays (CRs) based on a single type of CR source at all energies. All observed properties of CRs are predicted in terms of very simple and completely `standard' physics. The source of CRs is extremely `economical': it has only one parameter to be fitted to the enormous ensemble of all of the data. All other inputs are `priors', that is theoretical or observational items of information independent of the properties of the source of CRs and chosen to lie in their pre-established ranges.I discuss a theory of non-solar cosmic rays (CRs) based on a single type of CR source at all energies. All observed properties of CRs are predicted in terms of very simple and completely `standard' physics. The source of CRs is extremely `economical': it has only one parameter to be fitted to the enormous ensemble of all of the data. All other inputs are `priors', that is theoretical or observational items of information independent of the properties of the source of CRs and chosen to lie in their pre-established ranges
A Cannonball Model of Cosmic Rays
No full textI outline a "Cannon-Ball" model of Cosmic Rays in which their distribution in the Galaxy, their total "luminosity", the broken power-law spectra with their observed slopes, the position of the knee(s) and ankle(s), and the alleged variations of composition with energy are all explained in terms of simple and "standard" physics.I outline a Cannon-Ball model of Cosmic Rays in which their distribution in the Galaxy, their total luminosity, the broken power-law spectra with their observed slopes, the position of the knee(s) and ankle(s), and the alleged variations of composition with energy are all explained in terms of simple and standard physics
Avantprojecte de plantacio de 12 ha de vinyes al terme municipal de Casserres
No full textThe following project studies the feasibility of setting up a vineyard on a farmhouse located in Casserres, a village from Bergueda (Barcelona), with the aim to choose the best plant material and carry out the optimum soil management. To achieve it, the climatic and edaphic characteristic of the plot have been studied: the climatological indexes show that the fields could suffer early frosts and the vineyard would probably be exposed to fungal diseases, while the soil sampling indicates that it is calcareous, it has an overhead pH and it presents, mostly, a sandy-loam texture. This results determine that Parellada, Merlot, Sira and Ull de Llebre varieties, with a R-110 and 161-49C rootstock, become the chosen ones and the best adapted to conditions. Regarding the conduction system, it is recommended to install trellis and form a double Royat. Consequently, the ventilation and insolation become optimum and the incidence of fungal diseases decreases. About the soil management, it is proposed to apply a cover crop to reduce the erosion and control the evapotranspiration; in this way, the consequences mentioned would be mitigated. In sum, the implantation of any crop has to be previously studied to take out the maximum profit from the agronomic decisions.El present projecte estudia la viabilitat d’implantar un vinyar en una masia de la localitat de Casserres, un poble de la comarca del Bergueda (Barcelona), amb l’objectiu d’escollir la materia vegetal mes adequada i dur a terme la gestio del sol mes optima. Per aconseguir-ho, s’han tingut en compte les caracteristiques climatologiques i edafiques de la parcel·la: els indexs climatologics estudiats mostren que la finca pateix gelades primerenques i que la vinya estaria exposada a una alta probabilitat de patir malalties fungiques, mentre que el mostreig que s’ha fet del sol indica que aquest es calcari, que te un pH elevat i que presenta, majoritariament, una textura franco-arenosa. A partir d’aquests resultats es determina que les varietats Parellada, Merlot, Sira i Ull de Llebre, amb els peus R-110 i 161-49C, esdevenen el material escollit i millor adaptat per a les condicions. Respecte al tutoratge es recomana instal·lar una espatllera i formar un cordo Royat doble, ja que aixi s’obtenen una ventilacio i una insolacio optimes i es redueix la incidencia de malalties criptogamiques. Pel que fa a la gestio del sol, es proposa aplicar una coberta vegetal que s’encarregara, principalment, de reduir l’erosio i controlar l’evapotranspiracio; d’aquesta manera s’aconsegueix atenuar les consequencies dels factors limitants esmentats. En resum, la implantacio de qualsevol cultiu ha de ser previament estudiada per treure’n el maxim profit a partir de la presa de decisions agronomiques mes adients.El presente proyecto estudia la viabilidad de implantar un viñedo en una masia de la localidad de Casserres, un pueblo de la comarca del Bergueda (Barcelona), con el objetivo de escoger la materia vegetal mas adecuada y llevar a cabo la gestion del suelo mas optima. Para conseguirlo, se han tenido en cuenta las caracteristicas climatologicas y edaficas de la parcela: los indices climatologicos estudiados muestran que la finca sufre heladas tempranas y que la viña estaria expuesta a una alta probabilidad de sufrir enfermedades fungicas, mientras que el muestreo que se ha hecho del suelo indica que este es calcareo, que tiene un pH elevado y que presenta, mayoritariamente, una textura franco-arenosa. A partir de estos resultados se determina que las variedades Parellada, Merlot, Sira y Tempranillo, con los pies R-110 y 161-49C, acontecen el material escogido y mejor adaptado para las condiciones. Respecto al sistema de conduccion, se recomienda instalar una espaldera y formar un cordon Royat doble obteniendo; de esta forma se consiguen una ventilacion y una insolacion optimas y se reduce la incidencia de enfermedades fungicas. En cuanto a la gestion del suelo, se propone aplicar una cubierta vegetal que se encargara, principalmente, de reducir la erosion y controlar la evapotranspiracion; de este modo se consigue atenuar las consecuencias de los factores limitantes mencionados. En resumen, la implantacion de cualquier cultivo tiene que ser previamente estudiada para sacar el maximo provecho a partir de la toma de decisiones agronomicas mas adecuadas
COVID-19 Monitoring System using Social Distancing and Face Mask Detection on Surveillance video datasets
No full textIn the current times, the fear and danger of COVID-19 virus still stands
large. Manual monitoring of social distancing norms is impractical with a large
population moving about and with insufficient task force and resources to
administer them. There is a need for a lightweight, robust and 24X7
video-monitoring system that automates this process. This paper proposes a
comprehensive and effective solution to perform person detection, social
distancing violation detection, face detection and face mask classification
using object detection, clustering and Convolution Neural Network (CNN) based
binary classifier. For this, YOLOv3, Density-based spatial clustering of
applications with noise (DBSCAN), Dual Shot Face Detector (DSFD) and
MobileNetV2 based binary classifier have been employed on surveillance video
datasets. This paper also provides a comparative study of different face
detection and face mask classification models. Finally, a video dataset
labelling method is proposed along with the labelled video dataset to
compensate for the lack of dataset in the community and is used for evaluation
of the system. The system performance is evaluated in terms of accuracy, F1
score as well as the prediction time, which has to be low for practical
applicability. The system performs with an accuracy of 91.2% and F1 score of
90.79% on the labelled video dataset and has an average prediction time of 7.12
seconds for 78 frames of a video.Comment: I, Rujula Singh R, would like to apologize to the research community
for the confusion caused by the inconsistency in author lists between
multiple versions of this paper. I take full responsibility for this error
and will be more diligent in the future to ensure the accuracy and
consistency of our research publication
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