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1
El objetivo de este trabajo de investigación fue la función real de variable real, es una función que une a cada cifra real otra cifra real. Esta unión se expresa de la siguiente manera: f: R → R. Si la pareja (x, y) está incorporada a la función f, implica que f (x) = y . Por consiguiente, el domino lo constituyen las cifras x, para ellos existe la valía de f (x). La imagen, compuesto por los valores que toma f (x) donde x forma parte del dominio; es, en consecuencia, el colectivo de resultados. A x se le denomina variable explicativa o variable independiente. Sus valías se representan en el eje horizontal, eje de abscisas o eje OX. La y es la variable explicada o variable dependiente. Sus valías se representan en el eje vertical, eje de ordenadas o eje OY. Una y otra están formadas por cifras reales. Las funciones se emplean para solucionar o para explicar fenómenos físic...
2
tesis doctoral
Se obtuvieron diecinueve VHHs (dominios variables únicos de los anticuerpos de cadena pesada) que unen a CD105 (endoglina) humano, un co-receptor endotelial de TFG-β implicado en la regulación de la angiogénesis y el desarrollo de tumores, mediante screening por phage display de una biblioteca de ADNc de VHH obtenida de alpacas inmunizadas con un lisado de una línea celular de cáncer de vejiga que sobreexpresa CD105 (T24). Las secuencias de los VHH se analizaron con ExPASY, GeneDoc y BLAST y mostraron las características estructurales típicas de los VHHs. Ellas se clonaron y expresaron en pET22b(+)/E.coli y los VHHs recombinantes se purificaron por cromatografía de afinidad. Trece VHHs anti-CD105 fueron microarreglados en biochips para determinar la especificidad y afinidad a CD105 unido a membrana celular por SPRi, Los datos de SPRi mostraron que los VHHs unen a las células SC...
3
artículo
This paper shows pair breaking and electrostatic (Coulomb) interaction effects on the distribution of mass and kinetic energy in cold fission of 233U, 235U and 239Pu thermal neutron induced. The fission process ends at the scission point, when the complementary fragments 1 and 2, having masses y are formed. Then those fragments goes away each other and acquire kinetic energies y , reaching the detectors after emission of y neutrons, having masses and kinetic energies, respectively. As a result, in regions where the average of varies abruptly as function of , the distribution of will be wider than it was for the distribution of as a function of . Furthermore, the emission of neutrons erodes odd-even effects on the distribution of neutron number, defined as the difference between the relatives yields of fragments with even and odd, respectively. Neutron emission, consequently, also erodes ...
4
tesis de maestría
Se empleó el método de covarianza de flujos turbulentos para la determinación de flujos netos de carbono, respiración ecosistémica y productividad primaria bruta del bosque amazónico, en la región Madre de Dios, desde noviembre de 2016 (temporada lluviosa) hasta octubre de 2018 (temporada seca). Para ello, se utilizó un sistema compuesto por un anemómetro sónico, un analizador de gases infrarrojo, sensores de radiación, humedad y temperatura ubicados sobre una plataforma, a 46 metros, sobre el dosel del bosque. La compilación, procesamiento y análisis de datos se realizó empleando el lenguaje de programación R y los softwares comerciales Eddy Pro y TOVI. Se registró un 78,30 % de datos válidos en un periodo efectivo de 541 días. Las temperaturas promedio del aire oscilaron entre 21,6 y 25,6 °C y la humedad relativa alrededor de 80%. La distribución de patrones de vien...
5
artículo
In the present study we propose the use of graphitic felt anodes coated with iron to control electrochemically the amount of coagulating agent, in the form of the Fe(II)/Fe(III) pair, which is introduced into the aqueous phase. At the same time, this pair helps catalyze the electro-Fenton process while H2O2 is generated cathodically. Here are reported the conditions to modify cathodically the graphite felt surface, as well as its characterization by SEM-EDS microscopy and X-ray diffraction (XRD). This material is then used as an anode that acts as a source for the Fe(II)/Fe(III) pair, while an unmodified felt acts as a H2O2 generator. Under these conditions, by means of permanganometry, the H2O2 content produced in function of time is quantified. Finally, the graphite felt was applied in the electrochemical treatment of synthetic emulsions of palmitic acid stabilized in aqueous medium, a...
6
artículo
Se muestra las consecuencias erosivas de la emisión de neutrones sobre la distribución de número de masa (A) y energía cinética (E) de los fragmentos de fisión inducida por neutrones térmicos de U-233 y U-235, respectivamente. Además se muestra los efectos de la ruptura de parejas de nucleones, y de la interacción electrostática entre fragmentos en el punto de escisión, sobre la distribución de masa y energía cinética en la región fría de la fisión inducida por neutrones térmicos de U-233, U-235 y Pu-239, respectivamente. La emisión de neutrones erosiona los efectos par-impar sobre la distribución de número de neutrones (δN) de los fragmentos, definido como la diferencia de los rendimientos relativos de los fragmentos con número par (N_p) y número impar (N_i) de neutrones, respectivamente. Para evitar los efectos de la emisión de neutrones, se estudia la fisión ...
7
artículo
Objetive: To determine the functional integrity of the brainstem auditory pathway by the auditive brainstem response (ABR) in language-retarded children without pathology in both the middle ear and central nervous system and no neonatal hearing loss risk factors. Design: Retrospective transversal study. Setting: Naval Medical Center and Air Force Central Hospital Otorhinolaryngology Services, Lima. Peru. Material and methods: Analysis of children’s ABR performed in the last ten years included 48 children, 28 males and 20 females, 1 to 11 year-old. Main outcome measures were both latency time and morphology of waves I, II, III, IV, and V. Results: Latencies were normal at any age. Morphological distortion and/ or wave hypovoltage were found in 77% of the patients, more frequently (58%) in waves I and II that correspond to the auditory nerve and brainstem cochlear nuclei. Conclusions: Th...
8
tesis de maestría
Se empleó el método de covarianza de flujos turbulentos para la determinación de flujos netos de carbono, respiración ecosistémica y productividad primaria bruta del bosque amazónico, en la región Madre de Dios, desde noviembre de 2016 (temporada lluviosa) hasta octubre de 2018 (temporada seca). Para ello, se utilizó un sistema compuesto por un anemómetro sónico, un analizador de gases infrarrojo, sensores de radiación, humedad y temperatura ubicados sobre una plataforma, a 46 metros, sobre el dosel del bosque. La compilación, procesamiento y análisis de datos se realizó empleando el lenguaje de programación R y los softwares comerciales Eddy Pro y TOVI. Se registró un 78,30 % de datos válidos en un periodo efectivo de 541 días. Las temperaturas promedio del aire oscilaron entre 21,6 y 25,6 °C y la humedad relativa alrededor de 80%. La distribución de patrones de vien...
9
artículo
Using Monte Cario simulation have been carried out an.atomistic description of the structure and ordering processes in the system Cu - Au in a two-dimensional model. The ABV model of the alloy is a system of N atoms A and B, located in rigid lattice with sorne vacañt sites. In the model we assume pair wise interactions between nearest neighbors with constant ordering energy J,;, 0.03 eV. The dynarnics was introduced by means of a vacancy that exchanges of place with any atom of its neighbors . The simulations were carried out in a square lattice with 1024 and 4096 particles, using periodic boundary conditions to avoid border effects. We calculate the first two parameters of short range arder of Warren-Cowley as function of the concentration and tenl.petature. It was also studied the probabilities of formation of different atomic clusters that consist of 9 atoms as function of the concen...
10
artículo
Creative tourism is currently emerging as a differential and alternative proposal for experiences to vindicate the cultural, environmental and artistic aspects, while the tourist simulates immersive interaction with social, cultural and natural landscapes. This article develops a case study with the village community of La Puerta, San Nicolás de quebrada seca, municipality of Sopetrán, Antioquia, in order to analyze the possibilities of tourism use, which can be accessed by the inhabitants of the Afro-descendant collective territory of the village of La Puerta, in Sopetrán, Antioquia, from the approach of the orange economy. For this purpose, a qualitative research method was applied, from a participatory and interactive methodological approach, with the predominance of techniques such as sociographic analysis and group discussion. Recognition of the modes of representation and territ...
11
artículo
This paper shows pair breaking and electrostatic (Coulomb) interaction effects on the distribution of mass and kinetic energy in cold fission of 233U, 235U and 239Pu thermal neutron induced. The fission process ends at the scission point, when the complementary fragments 1 and 2, having masses y A1A2 are formed. Those fragments goes away each other and acquire kinetic energies y E1E2. The fragments emit neutrons eroding mass and kinetic energy distribution. In order to avoid these disturbances, cold fission, i.e. with no neutron emission, is studied. Contrary to expected, for that excitation energy region, tough weak, an even-odd effect is observed.This result is not incompatible with a strong odd-even effect on the charge distribution or neutron number distribution. Moreover In cold fission, the minimum value of total excitation energy ( ), as a function of , is correlated with the "Cou...
12
artículo
This paper shows pair breaking and electrostatic (Coulomb) interaction effects on the distribution of mass and kinetic energy in cold fission of 233U, 235U and 239Pu thermal neutron induced. The fission process ends at the scission point, when the complementary fragments 1 and 2, having masses y A1A2 are formed. Those fragments goes away each other and acquire kinetic energies y E1E2. The fragments emit neutrons eroding mass and kinetic energy distribution. In order to avoid these disturbances, cold fission, i.e. with no neutron emission, is studied. Contrary to expected, for that excitation energy region, tough weak, an even-odd effect is observed.This result is not incompatible with a strong odd-even effect on the charge distribution or neutron number distribution. Moreover In cold fission, the minimum value of total excitation energy ( ), as a function of , is correlated with the "Cou...
13
artículo
Molecular dynamics simulations with embedded-atom potential (EAM) have been performed to study the energetic and structural changes during the collision and coalescence of two Cun nanoparticles. We simulated collision of nanoparticles at several temperatures below the melting point and with different impact energy. Analyzing the potential energy change during the collision we identify three clearly defined stages. The pair correlation function and the pair analysis technique are used to reveal the structural changes in the collision process. The variation in the time of the population of different pairs has been quantified, being observed diverse structural transformations. During the collision of two equal icosahedral nanoparticles ( Cu55 ) has been observed different behavior of 1551 pairs depending on the impact velocity.
14
tesis doctoral
Uno de los objetivos de Desarrollo Sostenible establecidos por las Naciones Unidas en setiembre del 2015, es la respuesta mundial a la amenaza del cambio climático debido a la utilización de combustibles fósiles, y también asegurar el acceso y uso de las energías asequibles, fiables, sostenibles y modernas; siendo una de las tareas importantes la eficiencia energética y, principalmente en los motores eléctricos de inducción considerando que consumen cerca del 80 % del consumo energético industrial. Las pequeñas mejoras en la eficiencia generan importantes ahorros en los costos, así como disminución del impacto ambiental, por lo que surge la necesidad y la importancia de mejorar la eficiencia de los motores de inducción. En la presente Tesis se desarrolla una metodología para determinar las dimensiones y forma de las ranuras del rotor, para la optimización multiobjetivo y o...
15
artículo
In a normal coagulation / flocculation process, the coagulated / flocculated material is removed by sedimentation. The research proposal is to electrocoagulate and float them (electroflotation); For this, Al+3 and Fe+3 in-situ and oxygen and hydrogen are produced, in order to make this procedure more efficient (electroflotation), a pair of auxiliary electrodes is used, whose sole function is to produce these O2/H2 gases, This way the clots formed by the upper part of the system are removed. The simulated organic load comes from the reduction of the size of species such as proteins / meat, starches / cereals, cellulose / vegetables, fats / oils of vegetable and animal origin. The study was able to reduce turbidity of 1200-1300 NTU to values ​​below 16 NTU and values ​​of 3,400 mgL-1 of COD to values ​​below 500 mgL-1 of COD.
16
artículo
In a normal coagulation / flocculation process, the coagulated / flocculated material is removed by sedimentation. The research proposal is to electrocoagulate and float them (electroflotation); For this, Al+3 and Fe+3 in-situ and oxygen and hydrogen are produced, in order to make this procedure more efficient (electroflotation), a pair of auxiliary electrodes is used, whose sole function is to produce these O2/H2 gases, This way the clots formed by the upper part of the system are removed. The simulated organic load comes from the reduction of the size of species such as proteins / meat, starches / cereals, cellulose / vegetables, fats / oils of vegetable and animal origin. The study was able to reduce turbidity of 1200-1300 NTU to values ​​below 16 NTU and values ​​of 3,400 mgL-1 of COD to values ​​below 500 mgL-1 of COD.
17
tesis de grado
Her lateral dominion coats capital his sensory development's the space motive and crushes importance in order to 5 little boy to 7 years to be of the scheme it links up narrowly with the reading's learning and he notarizes it. Pérez (1986), he recommends taking into account human space a bidirectional space is presents for example in the writing, of the writing and of the reading. Sorne children present the left-handed side's predominance Toward the 4 years, than in the course of time tend to be told to (García Núñez, 1983). Other ones manifest the right-hand side's predominance, then also he will go away affirming at the mercy of the mediate educational influence. Kephart (1960), he maintains that when driving abilities become general they must be well-established to be the foundation of the little boy in the organization perceptual and conceptual worldly; Therefore, join the drivin...
18
tesis de maestría
Sobre la base del modelo de Análisis Crítico del Discurso de Fairclough (1992), se aborda la entrevista política de televisión en vivo —desde el caso de televisión por cable Todo se Sabe, programa peruano de entrevistas políticas, de emisión diaria y en vivo, en sus emisiones del 04 al 08 de diciembre del 2017—, como una práctica social respecto de la cual se desentrañará el proceso de producción del discurso, poniendo especial énfasis en el desempeño del(a) entrevistador(a) político(a). Asimismo, se investigará de qué manera dicho proceso de producción encarna los conceptos de política, poder y democracia. Para tal fin, se propone un método de estudio basado en cuatro factores de análisis: temporalcuantitativo, lógico-argumentativo, de pertinencia informativa, y de interacción y comunicación, los que indagan por parámetros mínimos que, según muestran los es...
19
artículo
The purpose of this instrumental study was to show how to conduct an RStudio process to obtain a content validity visual representation through the alluvial function of the ggplot2 package to Condom Use Self-Efficacy Scale (This paper explains the stages to analyze content validity using a visual representation of an interrater agreement and item – factor belonging and focused mainly on qualitative aspects to evaluate the judge’s behavior and items’ weight. Furthermore, the paper discusses classical criteria to obtain content validity and its representation. The visual representation used shows high relevance to present the qualitative data associated with the content validity analysis since it allows to visualize in a differential way the weight of the dimensions in each item, the content validity coefficient in the set of dimensions, and the behavior of the judges in the overall ...
20
artículo
The purpose of this instrumental study was to show how to conduct an RStudio process to obtain a content validity visual representation through the alluvial function of the ggplot2 package to Condom Use Self-Efficacy Scale (This paper explains the stages to analyze content validity using a visual representation of an interrater agreement and item – factor belonging and focused mainly on qualitative aspects to evaluate the judge’s behavior and items’ weight. Furthermore, the paper discusses classical criteria to obtain content validity and its representation. The visual representation used shows high relevance to present the qualitative data associated with the content validity analysis since it allows to visualize in a differential way the weight of the dimensions in each item, the content validity coefficient in the set of dimensions, and the behavior of the judges in the overall ...