Estudio de la investigación turística a través de las coautorías de artículos: cálculo de indicadores de colaboración y análisis de redes sociales

Se analiza la colaboración científica de las universidades catalanas en el campo del turismo entre 2000 y 2010. A partir de las coautorías de artículos, se calculan indicadores de colaboración simples y se examina la red colaboración. Se estudia la colaboración entre investigadores, instituciones y territorios. Los resultados muestran un aumento de la colaboración, diferencias entre las revistas y ausencia de relación entre colaboración y multidisciplinariedad. La red de colaboración presenta una baja densidad y varias subredes.Catalan universities scientific collaboration in tourism is analyzed, from 2000 to 2010. Through coauthorship data, simple collaboration indicators are calculated and the collaboration network is examined. Collaboration among researchers, institutions and territories is investigated. Results show an increase in collaboration, differences among journals, and absence of relationship between collaboration and multidisciplinarity. The collaboration network presents a low density and several subnetworks

Econometric analysis of the industrial growth determinants in Colombia

An econometric study is carried out using a panel data model with fixed effects to identify the industrial development determinants in Colombia during the term 2005–2015. The database used in the study corresponds to World Bank and the Colombian state. The determinants of industrial growth identified at the theoretical level that allow the enhancement of productive capacities to face foreign competition in Colombia are: innovation; networks of innovations and knowledge among companies and organizations; the interest rate; the capital-product ratio, the unit labor cost; and the exchange rate. The amount invested in scientific, technological and innovation activities by industrial group is the only variable that is not significant in the model

SEED ABORTION IN NATURALLY POLLINATED FLOWERS OF MEXICAN NATIVE PLANTS OF \u3ci\u3ePhaseolus coccineus\u3c/i\u3e L.

INTRODUCTION: Phaseolus coccineus L. plants require insects or hummingbirds to pollinate their flowers and set pods. The number of pods that can be produced by a plant is set by the number of flowers while the number of seeds is set by the number of ovules within the flowers (Stephenson, 1981). The arrest of the development of the seed after its partial differentiation, - seed abortion-, also determines the number of seeds per plant. The objective of this work is to determine the percentage of seed abortion per plant of two Mexican native varieties of Phaseolus coccineus L. MATERIALS AND METHODS: Two varieties (accessions no. 8446 and 8448) were selected from the Mexican bean collection of the Instituto Nacional de Investigaciones Forestales, Agrícolas y Pecuarias (INIFAP). Seeds harvested in November 2014, were sown in pots on April 5, 2015 and seedlings were transplanted outdoors on April 20, distant 2 meter apart. The plants were of indeterminate growth, climbing type. There were a natural occurrence of bees, bumblebees, and hummingbirds pollinators during the flowering period. The experiment was a complete randomized design, with two treatments (varieties), five replications (one plant per replication) and five sampling dates (Oct. 14, Nov. 4, Nov. 25, Dec. 9, and Dec. 16). At each sampling date, the mature pods per plant were harvested and opened. The following data were registered: a) the number of normal seeds per pod; b) the number of aborted seeds per pod including early abortions detected with the stereoscopic microscope. The sum of (a) and (b) = c, which represented the potential number of seeds per POD in each sampling date. It was evident at this point that practically all the pods in a variety had the same potential number of seeds. Therefore, the potential number of seeds per PLANT in each sampling date represented by Y = c*n, where n represents the number of pods per plant in each sampling date. Following when applicable, the similar procedure for seed abortion: Z = total number of aborted seeds per plant in each sampling date. The percentage of seed abortion (Z/Y)*100 (total number of aborted seeds per plant in each sampling date/potential number of seeds per plant in each sampling date)

SEED ABORTION IN NATURALLY POLLINATED FLOWERS OF MEXICAN NATIVE PLANTS OF \u3ci\u3ePhaseolus coccineus\u3c/i\u3e L.

INTRODUCTION: Phaseolus coccineus L. plants require insects or hummingbirds to pollinate their flowers and set pods. The number of pods that can be produced by a plant is set by the number of flowers while the number of seeds is set by the number of ovules within the flowers (Stephenson, 1981). The arrest of the development of the seed after its partial differentiation, - seed abortion-, also determines the number of seeds per plant. The objective of this work is to determine the percentage of seed abortion per plant of two Mexican native varieties of Phaseolus coccineus L. MATERIALS AND METHODS: Two varieties (accessions no. 8446 and 8448) were selected from the Mexican bean collection of the Instituto Nacional de Investigaciones Forestales, Agrícolas y Pecuarias (INIFAP). Seeds harvested in November 2014, were sown in pots on April 5, 2015 and seedlings were transplanted outdoors on April 20, distant 2 meter apart. The plants were of indeterminate growth, climbing type. There were a natural occurrence of bees, bumblebees, and hummingbirds pollinators during the flowering period. The experiment was a complete randomized design, with two treatments (varieties), five replications (one plant per replication) and five sampling dates (Oct. 14, Nov. 4, Nov. 25, Dec. 9, and Dec. 16). At each sampling date, the mature pods per plant were harvested and opened. The following data were registered: a) the number of normal seeds per pod; b) the number of aborted seeds per pod including early abortions detected with the stereoscopic microscope. The sum of (a) and (b) = c, which represented the potential number of seeds per POD in each sampling date. It was evident at this point that practically all the pods in a variety had the same potential number of seeds. Therefore, the potential number of seeds per PLANT in each sampling date represented by Y = c*n, where n represents the number of pods per plant in each sampling date. Following when applicable, the similar procedure for seed abortion: Z = total number of aborted seeds per plant in each sampling date. The percentage of seed abortion (Z/Y)*100 (total number of aborted seeds per plant in each sampling date/potential number of seeds per plant in each sampling date)

PopStar Evolutionary Synthesis Models II: Optical emission-line spectra from Giant H{\sc ii} regions

This is the second paper of a series reporting the results from the PopStar evolutionary synthesis models. Here we present synthetic emission line spectra of H{\sc ii} regions photoionized by young star clusters, for seven values of cluster masses and for ages between 0.1 and 5.2 Myr. The ionizing Spectral Energy Distributions (SEDs) are those obtained by the PopStar code \citep*{mgb09} for six different metallicities, with a very low metallicity set, Z=0.0001, not included in previous similar works. We assume that the radius of the H{\sc ii} region is the distance at which the ionized gas is deposited by the action of the mechanical energy of the winds and supernovae from the central ionizing young cluster. In this way the ionization parameter is eliminated as free argument, since now its value is obtained from the cluster physical properties (mass, age and metallicity) and from the gaseous medium characteristics (density and abundances). We discuss our results and compare them with those from previous models and also with a large and data set of giant H{\sc ii} regions for which abundances have been derived in a homogeneous manner. The values of the [OIII] lines (at $\lambda\lambda$ 4363, 4959, 5007\AA) in the lowest metallicity nebulae are found to be very weak and similar to those coming from very high metallicity regions (solar or over-solar). Thus, the sole use of the oxygen lines is not enough to distinguish between very low and very high metallicity regions. In these cases we emphasize the need of the additional support of alternative metallicity tracers, like the [SIII] lines in the near-\textit{IR}.Comment: 20 pages, 26 figures, accepted for publication in MNRAS Main Journa

Tendency in the growth of creole kids in extensive systems

The present investigation was developed at the State of Puebla, Mexico, to describe the tendency in the growth of Creole kids by means of the evaluation of the average daily weight gain (ADWG). A total of 161 kids were controlled from the birth to the 102 days of age. Every 15 days the kids were weighed, previous fasting with separation of the mother from afternoon of the previous day. The variables included were date and weight at birth, sex, childbirth type and weights every 15 days. The results show that the average weight to the birth was 2.562 ± 0.583 kg, the males surpassing females (p<0.01) in 9.57 percent (0.232 kg). Differences were observed in favour of those of simple childbirth. The final weight was 10.186 ± 2.723 kg for the females and 11.508 ± 3.616 kg for the males. The males from simple childbirth reached a greater weight (12.229 kg). The average daily weight gain (g) for all the animals was of 82.37 ± 26.9 g. The weight at the first month reached 106.2 g; at the second 95.5 g and 53.9 g at third. The smaller gains are observed in the females born from double childbirth with 64.01 ± 17.1 g, whereas the best growth behavior was find in males from simple childbirth with 94.34 ± 30.31 g. The better adjustment of the growth was obtained with potential type equations for the total of kids (Y= 3.23X0.262); second degree polynomial equations were better for the females (Y= 3.35 + 0.07497X -0.00007085 X2); potential equations for males (Y= 4.23X0.21); and also, potential for kids of simple childbirth (Y= 3.91X0.23) and second degree polynomial equations for kids of double childbirth (Y= 3.26 + 0.0947X - 0.00002069 X2).En el Estado de Puebla, México, se desarrolló la presente investigación con el objetivo de describir la tendencia en el crecimiento de cabritos criollos mediante la evaluación de la ganancia media diaria de peso (GMDp). Se dio seguimiento individual a 161 cabritos desde el nacimiento hasta los 102 días de edad, pesándose cada 15 días, previo ayuno con separación de la madre desde la tarde del día anterior. Las variables consideradas fueron fecha y peso de nacimiento, sexo, tipo de parto y pesos quincenales. Los resultados muestran que el peso promedio al nacimiento es de 2,562 ± 0,583 kg, superando los machos a las hembras (p<0,01) en un 9,57 p.100 (0,232 kg). Los de parto simple tuvieron mejor comportamiento. El peso final fue de 10,186 ± 2,723 kg para las hembras y de 11,508 ± 3,616 kg para los machos. La ganancia media diaria de peso (g) para el total de los animales fue de 82,37 ± 26,9 g en promedio. Por períodos, al primer mes alcanzan 106,2 g; en el segundo 95,5 g y 53,9 en el tercero. Las menores ganancias se observan en las hembras nacidas de parto gemelar, con 64,01 ± 17,1 g, mientras que el mejor comportamiento lo tienen los machos simples con 94,34 ± 30,31g. Las ecuaciones de mejor ajuste del crecimiento fueron de tipo potencial para el total de cabritos (Y= 3,23X 0,262); polinomial de segundo grado para las hembras (Y= 3,35 + 0,07497X - 0,00007085X2); potencial para machos (Y= 4,23X 0,21); potencial para cabritos de parto simple (Y =3,91X 0,23) y polinomial de segundo grado para cabritos de parto doble (Y= 3,26 + 0,0947X - 0,00002069X2)

Historic Landscapes of the Guadiamar River basin (Seville): Mining and metallurgy in the easternmost area of the Iberian Pyritic Belt

En este artículo se presentan los primeros resultados, incidiendo especialmente en los aspectos arqueometalúrgicos, del proyecto de investigación Los Paisajes del Guadiamar. Este proyecto se desarrolla desde el año 2010, f inanciado por la “Fundación Focus-Abengoa”, en el valle medio del río Guadiamar (centro-oeste de la provincia de Sevilla). Aunque aún no se ha con- cluido la obtención de todos los datos arqueológicos y analíticos, una valoración preliminar permite adelantar algunas conclusiones y, sobre todo, contrastar hipótesis y teorías enunciadas en anteriores trabajos de investigación.The f irst results of the research project Los Paisajes del Guadiamar are presented in this paper, paying special attention to archaeometallurgical aspects. This project has been going on since 2010, located in the mid-valley of the River Guadiamar (central-western area of the province of Seville) and backed by the “Fundación Focus-Abengoa”. Although not all the archaeo- logical and analytical data are yet available, a preliminary approach permits to put forward some conclusions and, above all, to validate or to refute hypotheses and theories proposed in previous research works

Efficient and versatile data analytics for deep networks

Deep networks (DN) perform cognitive tasks related with image and text at human-level. To extract and exploit the knowledge coded within these networks we propose a framework which combines state-of-the-art technology in parallelization, storage and analysis. Our goal, to make DN models available to all data scientists

Optimal Nitrogen Fertilization to Reach the Maximum Grain and Stover Yields of Maize (Zea mays L.): Tendency Modeling

Utilization of maize stover to the production of meat and milk and saving the grains for human consumption would be one strategy for the optimal usage of resources. Variance and tendency analyses were applied to find the optimal nitrogen (N) fertilization dose (0, 100, 145, 190, 240, and 290 kg/ha) for forage (F), stover (S), cob (C), and grain (G) yields, as well as the optimal grain-to-forage, cob-to-forage, and cob-to-stover ratios (G:F, C:F, and C:S, respectively). The study was performed in central Mexico (20.691389° N and −101.259722° W, 1740 m a.m.s.l.; Cwa (Köppen), 699 mm annual precipitation; alluvial soils). N-190 and N-240 improved the individual yields and ratios the most. Linear and quadratic models for CDM, GDM, and G:F ratio had coefficients of determination (R2) of 0.20–0.46 (p < 0.03). Cubic showed R2 = 0.30–0.72 (p < 0.02), and the best models were for CDM, GDM, and the G:F, C:F, and C:S DM ratios (R2 = 0.60–0.72; p < 0.0002). Neither SHB nor SDM negatively correlated with CDM or GDM (r = 0.23–0.48; p < 0.0001). Excess of N had negative effects on forage, stover, cobs, and grains yields, but optimal N fertilization increased the proportion of the G:F, C:F, and C:S ratios, as well as the SHB and SDM yields, without negative effects on grain production

Scientific collaboration in tourism: the case of catalan universities

Se analiza la colaboración científica de las universidades catalanas en el campo del turismo entre 2000 y 2010. A partir de las coautorías de artículos, se calculan indicadores de colaboración simples y se examina la red colaboración. Se estudia la colaboración entre investigadores, instituciones y territorios. Los resultados muestran un aumento de la colaboración, diferencias entre las revistas y ausencia de relación entre colaboración y multidisciplinariedad. La red de colaboración presenta una baja densidad y varias subredes.Catalan universities scientific collaboration in tourism is analyzed, from 2000 to 2010. Through coauthorship data, simple collaboration indicators are calculated and the collaboration network is examined. Collaboration among researchers, institutions and territories is investigated. Results show an increase in collaboration, differences among journals, and absence of relationship between collaboration and multidisciplinarity. The collaboration network presents a low density and several subnetworks