Time resolution analysis of detectors based on plastic scintillators coupled to silicon photomultipliers

The performance of several trigger counters based on plastic scintillators with silicon photomultiplier readout is investigated with cosmic rays. Efficiency and time resolution are measured using digital waveform analysis. The obtained results are relevant for trigger subsystems of Multi-Purpose Detector (MPD) and Baryonic Matter at the Nuclotron (BM@N) at the NICA heavy-ion collider. The results show very high efficiency and good timing performance of the counters

El consumo de feijoa sellowiana reduce los niveles de glucosa en sangre

El presente trabajo muestra el efecto que produce el jugo de la feijoa en reducir los niveles de glucosa en sangre en ratas wistar. Para ello, se diseñó una fase experimental en el que a este tipo de ratas se les trató con una solución de alto contenido de glucosa. En condiciones control las ratas presentaron niveles de glucosa en sangre de 85 ± 5 mg/dL. Después de consumir la solución glucosada durante 3 semanas su nivel de glucosa en sangre subió a 150 mg/dL. Posteriormente se les dio de tomar el jugo de feijoa por 3 semanas más. Cada semana se monitorearon los niveles de glucosa, al llegar la sexta semana se detectaron niveles similares a las condiciones control, es decir se alcanzaron niveles de 80 mg/dL de glucosa en sangre e inclusive menor, de 65 ± 4 mg/dL. Estos resultados muestran que el consumo diario del jugo de feijoa ayuda a reducir niveles de glucosa en sangre

Centrality evolution of the charged-particle pseudorapidity density over a broad pseudorapidity range in Pb-Pb collisions at root s(NN)=2.76TeV

Peer reviewe

Ecuación que obtiene con buena aproximación la suma de los primeros enteros a cualquier potencia entera positiva

En este trabajo se presenta un análisis numérico para obtener un método sencillo que calcule la suma de los primeros enteros, de 1 hasta n, elevados a cualquier potencia entera k. El aspecto más importante durante el análisis fue la obtención de una expresión de sólo tres términos para calcular la suma final de manera precisa con una diferencia porcentual relativamente pequeña. Asimismo, se presenta un estudio de esta diferencia porcentual que compara la suma precisa y la exacta

La espectroscopia y su tecnología: Un repaso histórico y su importancia para el siglo XXI

Muchas de las tecnologías del siglo XXI están encaminadas a resolver problemas generados en varios frentes: ambientales, de salud pública, de detección, nuevos materiales, nanotecnologías y muchas más que escapan de nuestra imaginación. Una de ellas, la espectroscopia, ha llegado a tal grado de desarrollo que, por ejemplo, en el área de la salud, es tan necesaria que es prácticamente imposible pensar en un diagnóstico sin el uso de la misma. Podemos ver literalmente al interior del cuerpo humano sin necesidad de procedimientos invasivos. En el ámbito ambiental, hemos sido capaces de detectar cantidades increíblemente minúsculas de contaminantes tanto en aire, suelo y agua. Además no debe olvidarse que esta tecnología es y ha sido, una herramienta de primer orden en las ciencias astronómicas. La espectroscopia y las tecnologías relacionadas con ella, son instrumentos esenciales en los laboratorios de casi todo el mundo. Sin embargo, no es un tema que se aborde como parte del conocimiento del desarrollo de las tecnologías basadas en la física de la luz, cosa que nos parece importante resaltar. Un repaso histórico, sus aplicaciones y tendencias, son motivo de discusión de este trabajo.Many of the technologies of the XXI century are aimed at solving problems generated on several fronts: environmental, public health, detection, new materials, nanotechnology and many more beyond our imagination. One of them, spectroscopy, has reached such a degree of development that, for example, in the area of health, is so necessary, it is virtually impossible to think of a diagnosis without the use thereof; We can literally see inside the human body without invasive procedures. In the environmental field, we have been able to detect quantities incredibly tiny contaminants, both in air, soil and water. Also, this technology is and has been a tool of the first order in astronomical science. Spectroscopy and related technologies are essential tools in the laboratories of almost everyone. However, it is not a topic to be addressed as part of the development of knowledge-based technologies in the physics of light, which seems important to highlight. A historical overview, applications and trends are cause for discussion of this work

El consumo de feijoa sellowiana reduce los niveles de glucosa en sangre

El presente trabajo muestra el efecto que produce el jugo de la feijoa en reducir los niveles de glucosa en sangre en ratas wistar. Para ello, se diseñó una fase experimental en el que a este tipo de ratas se les trató con una solución de alto contenido de glucosa. En condiciones control las ratas presentaron niveles de glucosa en sangre de 85 ± 5 mg/dL. Después de consumir la solución glucosada durante 3 semanas su nivel de glucosa en sangre subió a 150 mg/dL. Posteriormente se les dio de tomar el jugo de feijoa por 3 semanas más. Cada semana se monitorearon los niveles de glucosa, al llegar la sexta semana se detectaron niveles similares a las condiciones control, es decir se alcanzaron niveles de 80 mg/dL de glucosa en sangre e inclusive menor, de 65 ± 4 mg/dL. Estos resultados muestran que el consumo diario del jugo de feijoa ayuda a reducir niveles de glucosa en sangre

The DUNE Far Detector Vertical Drift Technology, Technical Design Report

International audienceDUNE is an international experiment dedicated to addressing some of the questions at the forefront of particle physics and astrophysics, including the mystifying preponderance of matter over antimatter in the early universe. The dual-site experiment will employ an intense neutrino beam focused on a near and a far detector as it aims to determine the neutrino mass hierarchy and to make high-precision measurements of the PMNS matrix parameters, including the CP-violating phase. It will also stand ready to observe supernova neutrino bursts, and seeks to observe nucleon decay as a signature of a grand unified theory underlying the standard model. The DUNE far detector implements liquid argon time-projection chamber (LArTPC) technology, and combines the many tens-of-kiloton fiducial mass necessary for rare event searches with the sub-centimeter spatial resolution required to image those events with high precision. The addition of a photon detection system enhances physics capabilities for all DUNE physics drivers and opens prospects for further physics explorations. Given its size, the far detector will be implemented as a set of modules, with LArTPC designs that differ from one another as newer technologies arise. In the vertical drift LArTPC design, a horizontal cathode bisects the detector, creating two stacked drift volumes in which ionization charges drift towards anodes at either the top or bottom. The anodes are composed of perforated PCB layers with conductive strips, enabling reconstruction in 3D. Light-trap-style photon detection modules are placed both on the cryostat's side walls and on the central cathode where they are optically powered. This Technical Design Report describes in detail the technical implementations of each subsystem of this LArTPC that, together with the other far detector modules and the near detector, will enable DUNE to achieve its physics goals

The DUNE Far Detector Vertical Drift Technology, Technical Design Report

DUNE is an international experiment dedicated to addressing some of the questions at the forefront of particle physics and astrophysics, including the mystifying preponderance of matter over antimatter in the early universe. The dual-site experiment will employ an intense neutrino beam focused on a near and a far detector as it aims to determine the neutrino mass hierarchy and to make high-precision measurements of the PMNS matrix parameters, including the CP-violating phase. It will also stand ready to observe supernova neutrino bursts, and seeks to observe nucleon decay as a signature of a grand unified theory underlying the standard model. The DUNE far detector implements liquid argon time-projection chamber (LArTPC) technology, and combines the many tens-of-kiloton fiducial mass necessary for rare event searches with the sub-centimeter spatial resolution required to image those events with high precision. The addition of a photon detection system enhances physics capabilities for all DUNE physics drivers and opens prospects for further physics explorations. Given its size, the far detector will be implemented as a set of modules, with LArTPC designs that differ from one another as newer technologies arise. In the vertical drift LArTPC design, a horizontal cathode bisects the detector, creating two stacked drift volumes in which ionization charges drift towards anodes at either the top or bottom. The anodes are composed of perforated PCB layers with conductive strips, enabling reconstruction in 3D. Light-trap-style photon detection modules are placed both on the cryostat's side walls and on the central cathode where they are optically powered. This Technical Design Report describes in detail the technical implementations of each subsystem of this LArTPC that, together with the other far detector modules and the near detector, will enable DUNE to achieve its physics goals

The DUNE Far Detector Vertical Drift Technology, Technical Design Report

International audienceDUNE is an international experiment dedicated to addressing some of the questions at the forefront of particle physics and astrophysics, including the mystifying preponderance of matter over antimatter in the early universe. The dual-site experiment will employ an intense neutrino beam focused on a near and a far detector as it aims to determine the neutrino mass hierarchy and to make high-precision measurements of the PMNS matrix parameters, including the CP-violating phase. It will also stand ready to observe supernova neutrino bursts, and seeks to observe nucleon decay as a signature of a grand unified theory underlying the standard model. The DUNE far detector implements liquid argon time-projection chamber (LArTPC) technology, and combines the many tens-of-kiloton fiducial mass necessary for rare event searches with the sub-centimeter spatial resolution required to image those events with high precision. The addition of a photon detection system enhances physics capabilities for all DUNE physics drivers and opens prospects for further physics explorations. Given its size, the far detector will be implemented as a set of modules, with LArTPC designs that differ from one another as newer technologies arise. In the vertical drift LArTPC design, a horizontal cathode bisects the detector, creating two stacked drift volumes in which ionization charges drift towards anodes at either the top or bottom. The anodes are composed of perforated PCB layers with conductive strips, enabling reconstruction in 3D. Light-trap-style photon detection modules are placed both on the cryostat's side walls and on the central cathode where they are optically powered. This Technical Design Report describes in detail the technical implementations of each subsystem of this LArTPC that, together with the other far detector modules and the near detector, will enable DUNE to achieve its physics goals