3,145 research outputs found
I Need Help! The Journey of a Novice Interpreter with Their Mentor and Coach
My coach always made sure that center of our sessions was to achieve long-term excellent performance. I would present a problem area in my work that I wanted to improve, and my coach would focus our meetings on how we can better this problem, but also ensure that this issue would longer linger in my work. That approach was successful, as that problem area was improved, and it no longer remains in my work. Therefore, one of the end products from my coaching was long-term excellent performance
Cosmological black holes and the direction of time
Macroscopic irreversible processes emerge from fundamental physical laws of
reversible character. The source of the local irreversibility seems to be not
in the laws themselves but in the initial and boundary conditions of the
equations that represent the laws. In this work we propose that the screening
of currents by black hole event horizons determines, locally, a preferred
direction for the flux of electromagnetic energy. We study the growth of black
hole event horizons due to the cosmological expansion and accretion of cosmic
microwave background radiation, for different cosmological models. We propose
generalized McVittie co-moving metrics and integrate the rate of accretion of
cosmic microwave background radiation onto a supermassive black hole over
cosmic time. We find that for flat, open, and closed Friedmann cosmological
models, the ratio of the total area of the black hole event horizons with
respect to the area of a radial co-moving space-like hypersurface always
increases. Since accretion of cosmic radiation sets an absolute lower limit to
the total matter accreted by black holes, this implies that the causal past and
future are not mirror symmetric for any spacetime event. The asymmetry causes a
net Poynting flux in the global future direction; the latter is in turn related
to the ever increasing thermodynamic entropy. Thus, we expose a connection
between four different "time arrows": cosmological, electromagnetic,
gravitational, and thermodynamic.Comment: 13 pages, 2 figures in Foundations of Science (2017
Density and gender segregation effects in the culture of the caridean ornamental red cherry shrimp Neocaridina davidi Bouvier, 1904 (Caridea: Atyidae)
The effect of density on growth, sex ratio, survival, and biochemical composition of the red cherry shrimp, Neocaridina davidi Bouvier, 1904, was studied to determine optimum rearing conditions in this ornamental species. It was tested whether gender segregation affected growth and survival of the species. To test the effect of density (Experiment 1), hatched juvenile shrimp were kept at three different densities: 2.5, 5, and 10 individuals l-1 (D2.5, D5 and D10, respectively). To test the effect of gender segregation (Experiment 2), 30-day juveniles were reared in three conditions: culture with only females, culture with only males, and mixed culture (females: males 1:1) at 5 individuals l-1 density. Experiments lasted 90 days, and shrimp were weighted either every 30 days (Experiment 1) or 15 days (Experiment 2). At day 90, females kept at D2.5 weighted 45% more than females stocked at D10 (P 0.05). Males at D2.5 weighted 29% more than D5 and D10 (P < 0.05). Survival was high and unaffected by treatment. Sexual differentiation did not differ among treatments. Females from D2.5 had the lowest lipid and protein content, which would occur if they had a higher spawning. Males from D2.5 had higher content of proteins, probably due to their larger size. Gender segregation had no effect over growth and survival; females grew up to a larger size than males both in monosex and mixed culture. It was shown that given to their non-aggressive behavior, N. davidi is tolerant to a highdensity condition, which makes it feasible as an ornamental species.Fil: Vázquez, Nicolás Darío. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Biodiversidad y Biología Experimental y Aplicada. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Biodiversidad y Biología Experimental y Aplicada; Argentina. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Biodiversidad y Biología Experimental; ArgentinaFil: Delevati Colpo, Karine. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Limnología "Dr. Raúl A. Ringuelet". Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Instituto de Limnología; ArgentinaFil: Sganga, Daniela Eliana. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Biodiversidad y Biología Experimental y Aplicada. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Biodiversidad y Biología Experimental y Aplicada; Argentina. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Biodiversidad y Biología Experimental; ArgentinaFil: Lopez, Laura Susana. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Biodiversidad y Biología Experimental y Aplicada. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Biodiversidad y Biología Experimental y Aplicada; Argentina. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Biodiversidad y Biología Experimental; Argentin
Can knowledge intensive services be a new growth engine for Latin America?
En las últimas décadas el sector servicios no sólo ha seguido ganando peso en la estructura económica global, sino que ha sufrido transformaciones cualitativas profundas, entre las cuáles se destacan la emergencia y el crecimiento de un conjunto de actividades que se caracterizan por su alto nivel de innovación y su contribución al aumento de la productividad. Se trata de los llamados “servicios intensivos en conocimiento”, que agrupan a segmentos tan diversos como servicios contables y legales, arquitectura, audiovisuales, ingeniería, software, publicidad, investigación y desarrollo (I+D), o servicios de salud y educación, pero que comparten la característica de emplear intensivamente capital humano de alto nivel de calificación y de ser usuarias y productoras de información y conocimiento para prestar servicios a sus clientes. Alrededor de estos servicios, que son altamente transables, se han formado cadenas globales de valor, hecho que ha llevado a una activa competencia entre firmas y países para ingresar y escalar dentro de las mismas. Este artículo recoge evidencia respecto de la creciente relevancia de estos servicios en la economía mundial, analiza los determinantes de la competitividad en dichos sectores, y discute el actual rol y las potencialidades de América Latina en estos mercados, con el objetivo de derivar algunas lecciones de política para la región.In the last decades, the service sector has not only increased their presence in the global economic scenario, but it also has suffered deep qualitative transformations, including the emergence and the rapid growth of a number of activities that are characterized by high innovative standards and their contribution to a considerable growth in productivity. We refer to the so called “knowledge intensive services”, which include activities as diverse as accounting and legal services, architecture, audiovisuals, engineering, software, advertising, research and development (R&D), health and education. All these activities share two main features: a) they require an intensive use of high skilled human resources; b) they use and produce information and knowledge to deliver services to their customers. Global value chains have been created in recent years around these activities, which are highly tradable, something that has led to an intense competition between firms and countries to participate and upgrade within those chains. This paper gathers evidence regarding the growing relevance of these services in the global economy. It also analyzes the determinants of competitiveness in those industries, discusses the role and perspectives of Latin America and finally suggests some policy lessons for our region.Fil: Lopez, Andres Flavio. Universidad Nacional de Tres de Febrero; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Ramos, Daniela. Universidad Nacional de Tres de Febrero; Argentin
Servicios basados en conocimiento y desarrollo en América Latina
El buen desempeño macroeconómico de América Latina entre 2004 y 2011 (solo interrumpido en 2009 por los efectos de la crisis sistémica global) generó expectativas sobre el inicio de un posible sendero de crecimiento sostenido. Sin embargo, debido a una combinación de circunstancias externas e internas, en años recientes la situación se deterioró severamente (especialmente en Sudamérica), alejando de nuevo la esperanza de salvar las trampas del ingreso medio o bajo en el que se encuentran sumidos los países de la región.Fil: Lopez, Andres Flavio. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Saavedra 15. Instituto Interdisciplinario de Economía Politica de Buenos Aires. Universidad de Buenos Aires. Facultad de Ciencias Económicas. Instituto Interdisciplinario de Economía Politica de Buenos Aires; ArgentinaFil: Ramos, Daniela. Centro de Invest.para la Transformacion; Argentin
Deterioration of willow seeds during storage
Willow (Salix spp.) seeds are able to tolerate desiccation, but differ from typical orthodox seeds in that they lose viability in a few days at room temperature, and in that the chloroplasts in embryo tissues do not dedifferentiate during maturation drying, thus retaining chlorophyll and maintaining intact their thylakoid membranes. In the present study, we investigated the damage generated in willow seeds during storage under appropriate conditions to exclude the eventual generation of reactive oxygen species by photooxidation. To this end, we measured different indicators of molecular damage, such as changes in the fatty acid profile, protein degradation, nuclease activities, and DNA damage, and evaluated normal germination and total germination in seeds stored for one, ten and sixteen years. We found: (i) a decrease in the fraction of unsaturated fatty acids; (ii) changes in the protein profile due to a decrease in protein solubility; (iii) activation of nucleases; and (iv) DNA fragmentation. Taken together, our findings identified programmed cell death as a key mechanism in seed deterioration during storage. We also found that, although the seeds maintained high percentages of total germination, the death program had already started in the seeds stored for ten years and was more advanced in those stored for sixteen years.Fil: Lopez Fernandez, Maria Paula. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Biodiversidad y Biología Experimental y Aplicada. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Biodiversidad y Biología Experimental y Aplicada; ArgentinaFil: Moyano, Laura. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Biodiversidad y Biología Experimental y Aplicada. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Biodiversidad y Biología Experimental y Aplicada; ArgentinaFil: Correa, María Daniela. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Biodiversidad y Biología Experimental; ArgentinaFil: Vasile, Franco Emanuel. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional del Chaco Austral. Departamento de Industrias Alimentarias; ArgentinaFil: Burrieza, Hernán Pablo. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Biodiversidad y Biología Experimental y Aplicada. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Biodiversidad y Biología Experimental y Aplicada; ArgentinaFil: Maldonado, Sara Beatriz. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Biodiversidad y Biología Experimental y Aplicada. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Biodiversidad y Biología Experimental y Aplicada; Argentin
Ozonioterapia em procedimentos estéticos
Ozone therapy is a therapy performed through the administration of ozone in the body, the gas is composed of 3 oxygen atoms (O3) and aims to assist in tissue oxygenation, in order to increase the immune system response, helping in diseases infectious diseases. Therefore, the aim of this study is to understand the scientific evidence of the ozone therapy technique in aesthetic dysfunctions. This is a literature review on the SciELO, PubMed and Science Direct electronic journal portal. It is considered a safe technique that does not harm the health of individuals and is commonly used to treat various disorders: aesthetic and medical.A ozonioterapia é uma terapia realizada por meio da administração do ozônio no corpo, o gás é composto por 3 átomos de oxigênio (O3) e tem como objetivo de auxiliar na oxigenação dos tecidos, afim de aumentar a resposta do sistema imunológico, ajudando nas doenças infecciosas. Sendo assim, o objetivo do presente estudo é compreender as evidências cientifícas da técnica de ozonioterapia nas disfunções estéticas. Trata-se de uma revisão de literatura no portal de periódicos eletrônicos da SciELO, PubMed e Science Direct. É considerada uma técnica segura que não traz danos a saúde dos indivíduos e é comumente utilizada para tratar diversas disfunções: estéticas e médicas.
 
Intradermotherapy for acne treatments
A acne vulgar é patologia e disfunção estética, crônica, comum em adolescentes. Atinge o folículo pilossebáceo, promovendo hiperprodução sebácea, hiperqueratinização folicular, aumento da colonização por Propionibacterium acnes e inflamação dérmica periglandular. A intradermoterapia é uma técnica utilizada para tratar diversas disfunções estéticas como: gordura localizada, celulite, rejuvenescimento, dentre outras disfunções como a acne. Sendo assim, o objetivo do presente estudo é identificar quais os ativos mais utilizados para o tratamento de acne com a utilização da intradermoterapia. Trata-se de uma revisão da literatura, sendo realizada a partir do portal de periódicos eletrônicos da SciELO, PubMed e Science Direct. Apesar de existir uma lacuna na literatura científica sobre o uso da intradermoterapia nos processos de tratamento para acne, a prática clínica vem demonstrando efeitos benéficos.Acne vulgaris is a chronic pathology and aesthetic dysfunction common in adolescents. It affects the pilosebaceous follicle, promoting sebaceous hyperproduction, follicular hyperkeratinization, increased colonization by Propionibacterium acnes and periglandular dermal inflammation. Intradermotherapy is a technique used to treat various aesthetic disorders such as: localized fat, cellulite, rejuvenation, among other disorders such as acne. Therefore, the aim of this study is to identify which actives are most used for the treatment of acne with the use of intradermotherapy. This is a literature review, carried out through the SciELO, PubMed and Science Direct electronic journals portal. Although there is a gap in the scientific literature on the use of intradermotherapy in acne treatment processes, clinical practice has shown beneficial effects
Música e inclusión en niños con Síndrome de Down en educación inicial
La presente tesina se centra en la Música como un instrumento metodológico para la
inclusión de niños y niñas con Síndrome de Down. El tema surge a partir del desarrollo
de distintas experiencias en las visitas a centros educativos en los últimos años en el
curso de Investigación y Práctica. Los niños Síndrome de Down al igual que todos los
niños en el aula, muestran interés por aprender y disfrutar de las clases. En ese sentido,
esta investigación presenta conceptos relacionados a la música, su función e
importancia en el nivel inicial y como un recurso metodológico en la inclusión de los
niños y niñas SD, donde se reconocerá el rol docente como parte importante en este
proceso. Asimismo, se encontrará la caracterización de los niños SD, su proceso de
inclusión y el desarrollo de habilidades a nivel emocional, cognitivo, físico y cognitivo
en la etapa preescolar
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