Comprender el mundo. La valencia hermenéutica del binomio Lebenswelt (Husserl) e In-der-Welt-sein (Heidegger).

Sin resume

La educación en valores como estrategia de desarrollo y consolidación de la persona moral

Se plantea la centralidad de los valores a través de una serie de reflexiones sociales y pedagógicas que pretenden conformar las líneas de actuación asociadas al afianzamiento y mejora de la personalidad moral. Resulta urgente procurar un desarrollo moral de la persona que se oriente en dos direcciones complementarias: una, hacia el logro de una felicidad interior no egoísta y otra, hacia la consecución de una felicidad fraternal y hospitalaria

Montecarlo simulation of the role of defects as the melting mechanism

We study in this paper the melting transition of a crystal of fcc structure with the Lennard-Jones potential, by using isobaric-isothermal Monte Carlo simulations. Local and collective updates are sequentially used to optimize the convergence. We show the important role played by defects in the melting mechanism in favor of modern melting theories.Comment: 6 page, 10 figures included. Corrected version to appear in Phys. Rev.

Kin discrimination allows plants to modify investment towards pollinator attraction.

Pollinators tend to be preferentially attracted to large floral displays that may comprise more than one plant in a patch. Attracting pollinators thus not only benefits individuals investing in advertising, but also other plants in a patch through a 'magnet' effect. Accordingly, there could be an indirect fitness advantage to greater investment in costly floral displays by plants in kin-structured groups than when in groups of unrelated individuals. Here, we seek evidence for this strategy by manipulating relatedness in groups of the plant Moricandia moricandioides, an insect-pollinated herb that typically grows in patches. As predicted, individuals growing with kin, particularly at high density, produced larger floral displays than those growing with non-kin. Investment in attracting pollinators was thus moulded by the presence and relatedness of neighbours, exemplifying the importance of kin recognition in the evolution of plant reproductive strategies

Changes in the trajectory of the radio jet in 0735+178?

We present multi-epoch 8.4 and 43 GHz Very Long Baseline Array images of the BL Lac object 0735+178. The images confirm the presence of a twisted jet with two sharp apparent bends of 90$^{\circ}$ within two milliarcseconds of the core, resembling a helix in projection. The observed twisted geometry could be the result of precession of the jet inlet, but is more likely produced by pressure gradients in the external medium through which the jet propagates. Quasi-stationary components are observed at the locations of the 90$^{\circ}$ bends, possibly produced by differential Doppler boosting. Identification of components across epochs, since the earliest VLBI observations of this source in 1979.2, proves difficult due to the sometimes large time gaps between observations. One possible identification suggests the existence of superluminal components following non--ballistic trajectories with velocities up to $11.6\pm 0.6 h_{65}^{-1} c$. However, in images obtained after mid-1995, components show a remarkable tendency to cluster near several jet positions, suggesting a different scenario in which components have remained nearly stationary in time at least since mid-1995. Comparison with the earlier published data, covering more than 19 years of observations, suggests a striking qualitative change in the jet trajectory sometime between mid-1992 and mid-1995, with the twisted jet structure with stationary components becoming apparent only at the later epochs. This would require a re-evaluation of the physical parameters estimated for 0735+178, such as the observing viewing angle, the plasma bulk Lorentz factor, and those deduced from these.Comment: 18 pages, 5 figures, accepted for publication in MNRA

Agronomic, economic and ecological aspects of the papaya (Carica papaya) production in Tabasco, Mexico

The cultivation of papaya is important in the tropic because it provides source of income to the farmer within a short time. Statistical data were obtained from farmers located in the Chontalpa, Rios and Centro-Sierra regions; the size of the survey was 67 farmers. The study shows the results of the farmers’ problem in a drastic reduction of their productivity because of the virosis and low prices in commercialization. The farmers were classified into three levels of technology, “low”, “middle” and “high”. The first one covers 88% of the farmers in seasonal conditions in contrast with the high technology that concentrates 4.5% in irrigation conditions. According to the technology used, the fertilizer shows more yields. Economically, the high technology had an internal tax return of 0.43 in comparison with the low technology of 0.25, which means that the investment is recovered with different yields. However, the use of high technology makes the system more competitive. Key words

Estimation of Genetic Parameters for Peak Yield, Yield and Persistency Traits in Murciano-Granadina Goats Using Multi-Traits Models

This paper studies parameters of a lactation curve such as peak yield (PY) and persistency (P), which do not conform to the usual selection criteria in the Murciano-Granadina (MG) breed, but are considered to be an alternative to benefit animal welfare without reducing production. Using 315,663 production records (of 122,883 animals) over a period of 24 years (1990–2014), genetic parameters were estimated with uni-, bi- and multivariate analysis using multiple trait derivative free restricted maximum likelihood (MTDFREML). The heritability (h2)/repeatability (re) of PY, yield (Y) and P was estimated as 0.13/0.19, 0.16/0.25 and 0.08/0.09 with the uni-trait and h2 of bi- and multi-traits analysis ranging from 0.16 to 0.17 of Y, while that of PY and Y remained constant. Genetic correlations were high between PY–Y (0.94 ± 0.011) but low between PY–P (–0.16 ± 0.054 to –0.17 ± 0.054) and between Y–P (–0.06 ± 0.058 to –0.05 ± 0.058). Estimates of h2/re were low to intermediate. The selection for Y–PY or both can be implemented given the genetic correlation between these traits. PY–P and Y–P showed low to negligible correlation values indicating that if these traits are implemented in the early stages of evaluation, they would not be to the detriment of PY–Y. The combination of estimated breeding values (EBVs) for all traits would be a good criterion for selection

Seroprevalencia de hepatitis virales en pacientes programados para artroplastia de sustitución de cadera y rodilla

Se estudiaron 102 pacientes consecutivos propuestos para artoplastia de sustitución de cadera o rodilla entre julio de 1998 y mayo de 2000 para conocer la prevalencia de marcadores serológicos de los virus de la hepatitis B (VHB) y C (VHC), y su asociación con factores de riesgo o predictivos prequirúrgicos. La edad media fue de 70±6 años, con predominio femenino. La prevalencia de antígeno de superficie del VHB fue de 1,96%, la de anticuerpo anti-core del mismo virus fue del 26,47%, y no se observó ningún marcador positivo frente al VHC. Ningún factor de riesgo o predictivo estudiado presentó diferencias significativas según la positividad de los marcadores, excepto la hepatopatía previa. La cohorte de pacientes estudiados, representativa de los pacientes programados para esta cirugía en nuestro medio, no presenta un mayor riesgo de transmisión de hepatitis vírica, aunque sí mayor contacto con el VHB que otras poblaciones de menor edad.One hundred and two consecutive patients scheduled for hip or knee arthroplasty were studied from July 1998 to May 2000, to detect the prevalence of serologic markets of B (HBV) and C (HCV) hepatitis viruses, and its preoperative association with rink or predictive factors. Mean age was 70±6 years, and women predominated. Prevalence of HBV surface antigen was 1,96%, that of HBV anti-core antibody was 26,47%, and no positive markers were observed against HCV. None of variables evaluated as risk or predictive factors showed significant association with presence of serum markers, except previous liver disease. The studied group of patients, representative of the scheduled patients for total hip or knee arthroplasty in our area, does not suggest a higher risk of viral hepatitis transmission. However, a higher number of contacts with HBV than in younger populations have been observed in this group