Evaluación de las pérdidas de caña de azúcar (saccharum officinarum spp.) que se producen en la UEB central azucarero “Cristino Naranjo” (Original)

The present work developed in the Central Sugar UEB Cristino Naranjo, It belongs to the Popular Piece Of Advice Cristino Naranjo, of the municipality Cacocum, province of Holguín, the same it had for objective to evaluate the losses in the Central Sugar UEB, I eat such: The losses in harvest, the evaluation of the efficiency of the cleanliness in the center of stock (THE), the loss of cane for fan (PVL), the consumption of electric power and the entrance of strange matter to the central sugar basin's tilter and the consequences that they bring I get in the manufacturing process. For the realization of the same utilized the standard himself NRAG XXI (2005) and the Manual of centers of stock and of cleanliness, through the analytical method – investigating, they measured themselves them percentage of ground in the harvested mass, center in the harvested mass, sheets in the harvested mass, plants arvenses in the harvested mass, the cane dries in the mass harvested, lost of cane at the field. Enter the ranking results it are  found that losses find 4.1 % below the 5 %, the efficiency of the center to a 30 %, the index of consumption 0,79 kW·t-1, and the matter makes bight wonder to the central you oscillate on the average to 11.8 %.El presente trabajo se desarrolló en la UEB Central Azucarero “Cristino Naranjo”, perteneciente al Consejo Popular “Cristino Naranjo”, del municipio Cacocum, provincia de Holguín, el mismo tuvo por objetivo evaluar las pérdidas en la UEB Central Azucarero, tales como: las pérdidas en cosecha, la evaluación de la eficiencia de la limpieza en el centro de acopio (EL), la pérdida de caña por ventilador (PVL), el consumo de energía eléctrica y la entrada de materia extraña al basculador del central azucarero y las consecuencias que traen consigo en el proceso fabril. Para la realización del mismo se utilizó la norma NRAG-XX1 (2005) Tecnológica explotativa. Gastos de energía eléctrica, y el Manual de centros de acopio y de limpieza, a través del método analítico – investigativo, se midieron los porcentajes de suelo en la masa cosechada, cogollo en la masa cosechada, hojas en la masa cosechada, plantas arvenses en la masa cosechada, caña seca en la masa cosechada, pérdidas de caña en el campo. Entre los resultados de mayor importancia se encuentran que las pérdidas se encuentran a 4,1 % debajo del 5 %, la eficiencia del centro a un 30 %, el índice de consumo 0,79 kW∙t-1, y la materia extraña entrante al central oscila en promedio a 11,8 %

EVALUACIÓN DE AUTOTRENES EN EL TRANSPORTE DE CAÑA DE AZÚCAR EN LA EMPRESA AZUCARERA “ARQUIMEDES COLINA ANTUNES” UTILIZANDO COSECHADORAS PARA CAÑA DE AZÚCAR CASE A 7000 (Original)

This work was performed at the Sugar Company “Arquímedes Colina" Granma. Aiming to evaluate the performance of the transport unit by calculating the coefficient of utilization of capacity, use the route, the use of working time, speed and technical mining rates with these machines harvesters. The work was done in the firing mechanical cutting in areas belonging to the company, by calculating the different indicators that determine the performance of transport units with harvesters (Case A 7000), which in this case were the trucks Beiba. The analysis method used is analytical-research, using the technique of photo timing for the transport process and data collection, as determined by the methodology for determining the exploitative rates that characterize the performance of transport units (as Companioni 1992). For statistical processing we used the Statgraphics Plus 5.1 software Esp Where the main results were: The use of load factor is low to 0.87 while the optimal body is 0.95 to 0.98, obtained technical speed is 36 km h -1and the range is 60 to 80 km.h-1 and the operating speed is well below the stated range is 15.4 km h 45 to 55 km h.-1El presente trabajo se realizó en la Empresa Azucarera “Arquímedes Colina” de Granma. Teniendo como objetivo de valorar  el rendimiento de la unidad de transporte partiendo del cálculo del  coeficiente de aprovechamiento de la capacidad de carga, de utilización del recorrido, de la utilización del tiempo de trabajo, de la velocidad técnica y la velocidad de explotación con estas máquinas cosechadoras. El trabajo se realizó en el pelotón de corte mecanizado en áreas perteneciente a la empresa,   mediante el cálculo  de los diferentes indicadores que determinan el rendimiento de las unidades de transporte con las máquinas cosechadoras (Case A 7000), que en este caso fueron los camiones BEIBEN. El método de análisis que se utilizó es el analítico-investigativo, utilizando la técnica del foto cronometraje para el proceso de transporte y la recopilación de datos, determinados según la metodología para la determinación de los índices explotativos que caracterizan el rendimiento de las unidades de transporte (según Companioni 1992). Para el procesamiento  estadístico se utilizó el software Statgraphics plus 5.1 Esp. Donde los principales resultados obtenidos fueron: El coeficiente de aprovechamiento de carga es bajo a  0,87 mientras que el óptimo se encuentra ente  0,95  a  0,98, la velocidad técnica obtenida es de 36 km.h-¹, el intervalo es de 60 a 80 km.h-¹ y la velocidad de explotación está muy por debajo del rango establecido es de 15,4 km h-¹ de 45 a 55 km.h-¹.&nbsp

TOMOGRAFÍA SÍSMICA DE REFRACCIÓN APLICADA A HIDROGEOLOGÍA EN EL RINCÓN DE SANTA MARÍA

La comunidad de El Rincón, en la provincia de Herrera, utiliza las aguas subterráneas como principal fuente de suministro de agua potable y para sus actividades agroindustriales. No obstante, la gestión integral del recurso conlleva al empleo de técnicas geofísicas, como la tomografía sísmica de refracción. Técnica implementada en esta investigación, con el objetivo de determinar la distribución de los estratos geológicos presentes en la zona y caracterizar el acuífero en explotación. Para esto se realizaron perfiles sísmicos, utilizados para elaborar un modelo de velocidades entre los 350 m/s y 4500 m/s, que al correlacionarse con la descripción litológica de los sondeos mecánicos del área (pozos), permite inferir la litología, destacando dos acuíferos, el primero, es el más somero, de tipo granular (areniscas), mientras que el segundo, es de tipo fisurado (aglomerado tobáceo fracturado). Ambos presentan diferentes profundidades y espesores. El acuífero somero, se encuentra sobreyacido por arcillas, indicando un acuífero con pocas probabilidades de contaminación.  Se presenta la ampliación de la distribución de la especie de murciélago Carollia sowelli (murciélago de cola corta de Sowell) en el Istmo de Panamá, basado en características y datos morfológicos de la especie

TOMOGRAFÍA SÍSMICA DE REFRACCIÓN APLICADA A HIDROGEOLOGÍA EN EL RINCÓN DE SANTA MARÍA

The community of El Rincón, in the province of Herrera, uses groundwater as the main source of drinking water supply and for its agro-industrial activities. However, the integral management of the resource leads to the use of geophysical techniques, such as seismic refractive tomography. Technique implemented in this research, with the objective of determining the distribution of the geological strata present in the area and characterize the aquifer in exploitation. For this purpose, seismic profiles were made, used to develop a model of velocities between 350 m/s and 4500 m/s, which, when correlated with the lithological description of the mechanical boreholes of the area (wells), allows inferring the lithology, highlighting two aquifers, the first, is the shallower, granular type (sandstone), while the second, is fissured type (fractured tobaceous agglomerate). Both have different depths and thicknesses. The shallow aquifer is overlain by clays, indicating an aquifer with little chance of contamination.La comunidad de El Rincón, en la provincia de Herrera, utiliza las aguas subterráneas como principal fuente de suministro de agua potable y para sus actividades agroindustriales. No obstante, la gestión integral del recurso conlleva al empleo de técnicas geofísicas, como la tomografía sísmica de refracción. Técnica implementada en esta investigación, con el objetivo de determinar la distribución de los estratos geológicos presentes en la zona y caracterizar el acuífero en explotación. Para esto se realizaron perfiles sísmicos, utilizados para elaborar un modelo de velocidades entre los 350 m/s y 4500 m/s, que al correlacionarse con la descripción litológica de los sondeos mecánicos del área (pozos), permite inferir la litología, destacando dos acuíferos, el primero, es el más somero, de tipo granular (areniscas), mientras que el segundo, es de tipo fisurado (aglomerado tobáceo fracturado). Ambos presentan diferentes profundidades y espesores. El acuífero somero, se encuentra sobreyacido por arcillas, indicando un acuífero con pocas probabilidades de contaminación.  Se presenta la ampliación de la distribución de la especie de murciélago Carollia sowelli (murciélago de cola corta de Sowell) en el Istmo de Panamá, basado en características y datos morfológicos de la especie

Impact of COVID-19 on cardiovascular testing in the United States versus the rest of the world

Objectives: This study sought to quantify and compare the decline in volumes of cardiovascular procedures between the United States and non-US institutions during the early phase of the coronavirus disease-2019 (COVID-19) pandemic. Background: The COVID-19 pandemic has disrupted the care of many non-COVID-19 illnesses. Reductions in diagnostic cardiovascular testing around the world have led to concerns over the implications of reduced testing for cardiovascular disease (CVD) morbidity and mortality. Methods: Data were submitted to the INCAPS-COVID (International Atomic Energy Agency Non-Invasive Cardiology Protocols Study of COVID-19), a multinational registry comprising 909 institutions in 108 countries (including 155 facilities in 40 U.S. states), assessing the impact of the COVID-19 pandemic on volumes of diagnostic cardiovascular procedures. Data were obtained for April 2020 and compared with volumes of baseline procedures from March 2019. We compared laboratory characteristics, practices, and procedure volumes between U.S. and non-U.S. facilities and between U.S. geographic regions and identified factors associated with volume reduction in the United States. Results: Reductions in the volumes of procedures in the United States were similar to those in non-U.S. facilities (68% vs. 63%, respectively; p = 0.237), although U.S. facilities reported greater reductions in invasive coronary angiography (69% vs. 53%, respectively; p < 0.001). Significantly more U.S. facilities reported increased use of telehealth and patient screening measures than non-U.S. facilities, such as temperature checks, symptom screenings, and COVID-19 testing. Reductions in volumes of procedures differed between U.S. regions, with larger declines observed in the Northeast (76%) and Midwest (74%) than in the South (62%) and West (44%). Prevalence of COVID-19, staff redeployments, outpatient centers, and urban centers were associated with greater reductions in volume in U.S. facilities in a multivariable analysis. Conclusions: We observed marked reductions in U.S. cardiovascular testing in the early phase of the pandemic and significant variability between U.S. regions. The association between reductions of volumes and COVID-19 prevalence in the United States highlighted the need for proactive efforts to maintain access to cardiovascular testing in areas most affected by outbreaks of COVID-19 infection

Search for heavy resonances decaying to two Higgs bosons in final states containing four b quarks

A search is presented for narrow heavy resonances X decaying into pairs of Higgs bosons (H) in proton-proton collisions collected by the CMS experiment at the LHC at root s = 8 TeV. The data correspond to an integrated luminosity of 19.7 fb(-1). The search considers HH resonances with masses between 1 and 3 TeV, having final states of two b quark pairs. Each Higgs boson is produced with large momentum, and the hadronization products of the pair of b quarks can usually be reconstructed as single large jets. The background from multijet and t (t) over bar events is significantly reduced by applying requirements related to the flavor of the jet, its mass, and its substructure. The signal would be identified as a peak on top of the dijet invariant mass spectrum of the remaining background events. No evidence is observed for such a signal. Upper limits obtained at 95 confidence level for the product of the production cross section and branching fraction sigma(gg -> X) B(X -> HH -> b (b) over barb (b) over bar) range from 10 to 1.5 fb for the mass of X from 1.15 to 2.0 TeV, significantly extending previous searches. For a warped extra dimension theory with amass scale Lambda(R) = 1 TeV, the data exclude radion scalar masses between 1.15 and 1.55 TeV

Measurement of the top quark forward-backward production asymmetry and the anomalous chromoelectric and chromomagnetic moments in pp collisions at √s = 13 TeV

Abstract The parton-level top quark (t) forward-backward asymmetry and the anomalous chromoelectric (d̂ t) and chromomagnetic (μ̂ t) moments have been measured using LHC pp collisions at a center-of-mass energy of 13 TeV, collected in the CMS detector in a data sample corresponding to an integrated luminosity of 35.9 fb−1. The linearized variable AFB(1) is used to approximate the asymmetry. Candidate t t ¯ events decaying to a muon or electron and jets in final states with low and high Lorentz boosts are selected and reconstructed using a fit of the kinematic distributions of the decay products to those expected for t t ¯ final states. The values found for the parameters are AFB(1)=0.048−0.087+0.095(stat)−0.029+0.020(syst),μ̂t=−0.024−0.009+0.013(stat)−0.011+0.016(syst), and a limit is placed on the magnitude of | d̂ t| &lt; 0.03 at 95% confidence level. [Figure not available: see fulltext.

Measurement of the top quark mass using charged particles in pp collisions at root s=8 TeV

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Measurement of t(t)over-bar normalised multi-differential cross sections in pp collisions at root s=13 TeV, and simultaneous determination of the strong coupling strength, top quark pole mass, and parton distribution functions

Peer reviewe

Search for Physics beyond the Standard Model in Events with Overlapping Photons and Jets

Results are reported from a search for new particles that decay into a photon and two gluons, in events with jets. Novel jet substructure techniques are developed that allow photons to be identified in an environment densely populated with hadrons. The analyzed proton-proton collision data were collected by the CMS experiment at the LHC, in 2016 at root s = 13 TeV, and correspond to an integrated luminosity of 35.9 fb(-1). The spectra of total transverse hadronic energy of candidate events are examined for deviations from the standard model predictions. No statistically significant excess is observed over the expected background. The first cross section limits on new physics processes resulting in such events are set. The results are interpreted as upper limits on the rate of gluino pair production, utilizing a simplified stealth supersymmetry model. The excluded gluino masses extend up to 1.7 TeV, for a neutralino mass of 200 GeV and exceed previous mass constraints set by analyses targeting events with isolated photons.Peer reviewe