Propuesta para la implementación de mezclas asfálticas tibias en la ciudad de Medellín

Ante la evidencia de las experiencias de fabricación de mezclas asfálticas convencionales empleadas en la ciudad de Medellín, surge la inquietud de realizar esta alternativa de estudio de investigación documental y generar beneficios importantes en aspectos ambientales, técnicos y económicos, con el fin de estimular a los fabricantes de asfalto, empresas, entidades de desarrollo en el sector público y privado para proponer la implementación de mezcla tibia en la ciudad. Debido a que en la ciudad de Medellín no se ha incursionado en cuanto a la fabricación de nuevas técnicas de mezclas asfálticas, ya que la demanda de producción y aplicación son mezclas convencionales, se considera que la implementación de mezclas asfálticas fabricadas de menor temperatura “Mezclas Tibias” es apropiada, considerando los materiales existentes en el medio, y así iniciar un nuevo proceso tecnológico, generando la posibilidad de entrar este producto al mercado beneficioso a la ciudad

HIGHLAND AVIAN SURVEYS IN CERRO HOYA NATIONAL PARK (AZUERO, PANAMÁ) REVEAL NEW RANGE EXTENSIONS, INCLUDING A RARE HUMMINGBIRD (SELASPHORUS SP.)

Abstract ∙ Cerro Hoya National Park in Panama (CHNP) is one of the least explored protected areas in southern Mesoamerica. It houses the greatest ecosystem diversity in the degraded Azuero Peninsula, but its inaccessibility hinders expeditions and scientific research. Avian richness in CHNP was previously estimated by combining data from five ornithological expeditions at ca. 225 species. However, the highest altitude areas remained relatively unexplored and some historical records were not verified. We intensively surveyed highlands and foothills of CHNP and identified five new range extensions. One of these included a Selasphorus sp., of which we collected three male (two adults, one immature) and one female specimens. We compared morphology and plumage color patterns of these with closely related species in detail and confirm their likely classification with the endangered Glow-throated Hummingbird (Selasphorus ardens). This species is rare, with few documented sightings, confirmed specimens, and no unambiguous female museum specimen until now. We also confirmed historical records and provide 26 unlisted species (one by an external source) to CHNP. Our results confirm that Cerro Hoya is a highly biodiverse skyisland of Mesoamerica. We urge improved enforcement of its protection in combination with further studies of the ecology and evolutionary processes in this unique region. Resumen · Censos ornitológicos en ambientes de altura en el Parque Nacional Cerro Hoya (Azuero, Panamá) revelan nuevas extensiones de distribución, incluyendo un inusual colibrí (Selasphorus sp.) El Parque Nacional Cerro Hoya (PNCH) es una de las áreas protegidas menos exploradas de Panamá y el sur de Mesoamérica. Este alberga la mayor diversidad de ecosistemas en la degradada península de Azuero, pero su inaccesibilidad dificulta la investigación científica. Combinando datos de cinco expediciones ornitológicas, se estimó una riqueza aviar de alrededor de 225 especies. No obstante, las áreas de mayor altitud permanecieron relativamente inexploradas y algunos registros históricos no fueron verificados. Exploramos intensivamente las tierras altas y estribaciones del PNCH e identificamos cinco nuevas extensiones de distribución. Uno de estos incluye Selasphorus sp., del cual colectamos tres especímenes machos (dos adultos, un juvenil) y una hembra. Comparamos detalladamente la morfología y los patrones de coloración del plumaje con especímenes de especies relacionadas estrechamente. Confirmamos que estos individuos podrían pertenecer al amenazado Colibrí Ardiente (Selasphorus ardens). Esta especie es rara, con pocos avistamientos y especímenes de museo con información inconsistente, principalmente en hembras. También confirmamos los registros históricos y agregamos 26 especies no listadas para el PNCH (una obtenida por fuente externa). Nuestros resultados confirman que Cerro Hoya es una isla-cielo de gran biodiversidad en Mesoamérica. Es urgente mejorar la aplicación de su protección, así como estudiar la ecología y los procesos evolutivos en esta región única

Design and validation of the questionnaire “GAMEPLAY” for the assessment of sports activities

Knowledge of play is essential in the field of education and sport, the aim of this research work is to create an instrument in order to measure in a proper and reliable way the analysis of play in people who practise sports non-professionally, based on a multidimensional and hierarchical model of play. Validation of content has been carried out with the agreement and consensus of sixteen experts with a PhD degree in Physical Activity and Sports Science using the Delphi Method and validity of understanding has been established by the application of the questionnaire to a sample of 769 non-professional athletes/players aged between 21 and 51. Some changes were made based on initial data collected using the Delphi Method. The final test named GAMEPLAY was made up of 12 items which were suitably fit regarding validity of understanding and validity of content. Confirmatory factor analysis established three dimensions (usability, satisfaction and empathy

Sampling strategies using the "accumulation chamber" for monitoring geological storage of CO2

Fundación Ciudad de la Energía (CIUDEN) is carrying out a project of geological storage of CO2, where CO2 injection tests are planned in saline aquifers at a depth of 1500 m for scientific objectives and project demonstration. Before any CO2 is stored, it is necessary to determine the baseline flux of CO2 in order to detect potential leakage during injection and post-injection monitoring. In November 2009 diffuse flux measurements of CO2 using an accumulationchamber were made in the area selected by CIUDEN for geological storage, located in Hontomin province of Burgos (Spain). This paper presents the tests carried out in order to establish the optimum sampling methodology and the geostatistical analyses performed to determine the range, with which future field campaigns will be planned

CO2 and Rn degassing from the natural analog of Campo de Calatrava (Spain): Implications for monitoring of CO2 storage sites

Natural analogs offer a valuable opportunity to investigate the long-term impacts associated with thepotential leakage in geological storage of CO2.Degassing of CO2and radon isotopes (222Rn?220Rn) from soil, gas vents and thermal water dischargeswas investigated in the natural analog of Campo de Calatrava Volcanic Field (CCVF; Central Spain) todetermine the CO2?Rn relationships and to assess the role of CO2as carrier gas for radon. Furthermore,radon measurements to discriminate between shallow and deep gas sources were evaluated under theperspective of their applicability in monitoring programs of carbon storage projects.CO2flux as high as 5000 g m?2d?1and222Rn activities up to 430 kBq m?3were measured;220Rn activi-ties were one order of magnitude lower than those of222Rn. The222Rn/220Rn ratios were used to constrainthe source of the Campo de Calatrava soil gases since a positive correlation between radon isotopic ratiosand CO2fluxes was observed. Thus, in agreement with previous studies, our results indicate a deepmantle-related origin of CO2for both free and soil gases, suggesting that carbon dioxide is an efficientcarrier for Rn. Furthermore, it was ascertained that the increase of222Rn in the soil gases was likely pro-duced by two main processes: (i) direct transport by a carrier gas, i.e., CO2and (ii) generation at shallowlevel due to the presence of relatively high concentrations of dissolved U and Ra in the thermal aquiferof Campo de Calatrava.The diffuse CO2soil flux and radon isotopic surveys carried out in the Campo de Calatrava VolcanicFields can also be applicable to geochemical monitoring programs in CCS (Carbon Capture and Storage)areas as these parameters are useful to: (i) constrain CO2leakages once detected and (ii) monitor both theevolution of the leakages and the effectiveness of subsequent remediation activities. These measurementscan also conveniently be used to detect diffuse leakages

The Financial Literacy of Undergraduate Public Accounting Students: A Case Study

En la sociedad moderna, la educación financiera, entendida como el conjunto de conocimientos y habilidades para comprender y utilizar las finanzas apropiadamente, se vuelve cada vez más necesaria.  El presente artículo tuvo los objetivos de caracterizar y diferenciar la educación financiera de los estudiantes universitarios de contaduría pública en función de su género y su estado laboral actual.  Se aplicó un cuestionario electrónico a 100 estudiantes de un programa educativo de Contaduría Pública en una universidad pública estatal en México. Se encontró evidencia que sugiere que los hombres podrían tener puntuaciones mayores en aspectos relacionados con conocimiento y conducta financieros. Sin embargo, se requiere más investigación para determinarlo. En el caso de las diferencias encontradas por el estado laboral actual, se pudo establecer que los participantes que más se comunican con sus padres al atravesar por crisis financieras son aquellos que no tienen empleo. La educación financiera, al ser un tema de alta incidencia en la vida de las personas, debería promoverse con mayor intensidad en la vida estudiantil. Esto propiciaría finanzas más saludables entre el estudiantado. No obstante, este planteamiento requiere desarrollarse más para concretar un programa de alfabetización financiera para todos los alumnos universitarios sin importar su especialidad.In modern society, financial education, understood as the set of knowledge and skills to understand and use finance appropriately, is becoming increasingly necessary.  The present article had the objectives of characterizing and differentiating the financial education of university students of public accounting according to their gender and their current employment status.  An electronic questionnaire was administered to 100 students in a public accounting education program at a state public university in Mexico. Evidence was found suggesting that men may have higher scores in aspects related to financial knowledge and behavior. However, more research is needed to determine this. In the case of the differences found by current employment status, it could be established that the participants who communicate more with their parents when going through financial crises are those who are unemployed. Financial education, being a topic of high incidence in people's lives, should be promoted with greater intensity in student life. This would lead to healthier finances among students. However, this approach needs to be further developed in order to develop a financial literacy program for all university students regardless of their major

Systematic Approach for the selection of monitoring technologies in CO2 geological storage projects. Application of multicriteria decision making

Geologic storage of carbon dioxide (CO2) has been proposed as a viable means for reducing anthropogenic CO2 emissions. Once injection begins, a program for measurement, monitoring, and verification (MMV) of CO2 distribution is required in order to: a) research key features, effects and processes needed for risk assessment; b) manage the injection process; c) delineate and identify leakage risk and surface escape; d) provide early warnings of failure near the reservoir; and f) verify storage for accounting and crediting. The selection of the methodology of monitoring (characterization of site and control and verification in the post-injection phase) is influenced by economic and technological variables. Multiple Criteria Decision Making (MCDM) refers to a methodology developed for making decisions in the presence of multiple criteria. MCDM as a discipline has only a relatively short history of 40 years, and it has been closely related to advancements on computer technology. Evaluation methods and multicriteria decisions include the selection of a set of feasible alternatives, the simultaneous optimization of several objective functions, and a decision-making process and evaluation procedures that must be rational and consistent. The application of a mathematical model of decision-making will help to find the best solution, establishing the mechanisms to facilitate the management of information generated by number of disciplines of knowledge. Those problems in which decision alternatives are finite are called Discrete Multicriteria Decision problems. Such problems are most common in reality and this case scenario will be applied in solving the problem of site selection for storing CO2. Discrete MCDM is used to assess and decide on issues that by nature or design support a finite number of alternative solutions. Recently, Multicriteria Decision Analysis has been applied to hierarchy policy incentives for CCS, to assess the role of CCS, and to select potential areas which could be suitable to store. For those reasons, MCDM have been considered in the monitoring phase of CO2 storage, in order to select suitable technologies which could be techno-economical viable. In this paper, we identify techniques of gas measurements in subsurface which are currently applying in the phase of characterization (pre-injection); MCDM will help decision-makers to hierarchy the most suitable technique which fit the purpose to monitor the specific physic-chemical parameter

Oral manifestations of ellis-van creveld syndrome. A rare case report

Ellis-van Creveld syndrome (EVC) or chondroectodermal dysplasia is an autosomal recessive disorder, characterized by dwarfism, polydactyly, hypoplastic fingernails and congenital heart defects, finding in most of the cases orofacial anomalies. We describe a clinical case of a 9 year old male patient diagnosed with EVC who visited our Maxillofacial private consultation at Alcorcon Southern Hospital, presenting typical oral manifestations such as dental agenesis, delayed eruption, hypoplasia of the enamel, dental dysmorphism, taurodontism and supernumerary teeth. EVC syndrome is a rare disease and requires a multidisciplinary approach. Oral features are constant and requires the jointly performance of Odontologist and Maxillofacial surgeon aiming to get an appropriate treatment sequence surgery-orthodontics in order to achieve a suitable functional result to improve the quality of life of these patients

CO2 Emission from two old mine drillings (Mt. Amiata, Central Italy) as a possible example of storage and leakage of deep-seated CO2

CO2 Emission from two old mine drillings (Mt. Amiata, Central Italy) as a possible example of storage and leakage of deep-seated CO

Origin of the gases released from the Acqua Passante and Ermeta wells (Mt. Amiata, central Italy) and possible environmental implications for their closure

The Mt. Amiata volcano (Tuscany, central Italy) hosts the second largest geothermal field of Italy. Its SW and NE sectors are characterized by the presence of several CO2-rich (mayor que95% by vol.) gas discharges. An intense Hg mining activity had taken place from the 19th century up to the end of the ?70s, particularly close to Abbadia San Salvatore, during which two drillings (Acqua Passante and Ermeta) intercepted a CO2-rich gas fertile horizon. The related gases are emitted in the atmosphere since 1938 and 1959, respectively, causing severe concerns for the local air quality. In this work the results of a geochemical and isotopic survey carried out on these gas emissions from March 2009 to January 2014 are presented. CO2 fluxes from both the two wells and soil from an area of about 653,500 m2 located between them were measured. The two wells are emitting up to 15,000, 92 and 8 tons y-1 of CO2, CH4 and H2S, respectively, while the computed soil CO2 output was estimated at 4,311 ton y-1. The spatial distribution of the CO2 soil flux suggests the presence of preferential patterns, indicating sites of higher permeability. Since the local municipality is evaluating the possibility to plug the Ermeta vent, a temporarily closure should first be carried out to test the possible influence of this operation on the diffuse soil degassing of deep-originated CO2 in the surrounding area. This implies that diffuse soil gases should carefully be monitored before proceeding with its definitive closure