175,726 research outputs found
Arnold, D. E. — Ecology and ceramic production in an Andean Community
No full textMonzon Susana. Arnold, D. E. — Ecology and ceramic production in an Andean Community. In: Journal de la Société des Américanistes. Tome 80, 1994. pp. 355-358
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[Letter from Ricardo Hernandez to D. Jack Davis, March 31, 1993]
No full textA letter from Ricardo Hernandez to D. Jack Davis, a co-director of the NTIEVA program. The letter is about the funding application to the TCA and includes a list of applicants and their information
One-loop effective potential in M4 x T2 with and without 't hooft flux
No full text43 pages, 3 figures.We review the basic notions of compactification in the presence of a back-
ground flux. In extra-dimentional models with more than five dimensions, Scherk
and Schwarz boundary conditions have to satisfy’t Hooft consistency conditions.
Different vacuum configurations can be obtained, depending whether trivial or
non-trivial’t Hooft flux is considered. The presence of the “magnetic” back-
ground flux provide, in addition, a mechanism for producing four-dimensional
chiral fermions. Particularizing to the six-dimensional case, we calculate the
one-loop effective potential for a U(N) gauge theory on M4 × T 2. We firstly
review the well known results of the trivial ’t Hooft flux case, where one-loop
contributions produce the usual Hosotani dynamical symmetry breaking. Finally
we applied our result for describing, for the first time, the one-loop contributions
in the non-trivial’t Hooft flux case.The work of A.F. Faedo, D. Hernandez and S. Rigolin has been partially
supported by CICYT through the project FPA2006-05423 and by CAM through the
project HEPHACOS, P-ESP-00346. D. Hern´andez acknowledges financial support
from the MEC through FPU grant AP-2005-3603. S.Rigolin aknowledges also the
partial support of an Excellence Grant of Fondazione Cariparo and of the European
Programme “Unification in the LHC era” under the contract PITN-GA-2009-237920
(UNILHC)Peer reviewe
Graphene oxide biohybrid layer enhances sensitivity and anticorrosive properties in refractive index sensor
No full textGraphene-based materials are capable of enhancing the refractometric response of prism-A nd optical fiber-based surface plasmon resonance (SPR) sensors; however, complicated multistep and time-consuming attaching processes could limit their practical applications. Herein, for the first time, we demonstrate the immobilization of graphene oxide (GO) submicrometric sheets onto the surface of a gold-coated single-mode fiber using a coating of fungal self-assembling proteins, the hydrophobins (HFBs), as an adhesive nanolayer. Hetero-core fiber tip SPR structures used in this study, consisting of a mirrored multimode-single-mode fiber structure coated with different thin layers (a chromium layer of 3 nm and a gold layer of 30 nm on top) exhibited a refractive index sensitivity (SRI) of 1842 nm RIU-1 (RIU: Refractive index unit) at a refractive index (RI) of 1.36. Self-assembly of GO over the SPR fiber tip via HFB, offered an enhancement of up to 20% in the SRI. Moreover, this HFB-GO coating prevented degradation of the Al thin film mirror caused by corrosive salt-water solutions. The process is very simple, harmless, rapid (around 15 min) and scalable, as it is mostly based on one plasma treatment, which can be performed in large chambers and two dip coating steps, in liquid baths. All these features make the use of self-assembled bio/non-bio hybrid coating a green industrial method to improve the performance of SPR fiber biosensors, if compared with traditional chemical methods. Materials applied in this technology, fungal proteins and derivatives of graphite, are sustainable and largely available
Multivariate analysis of fuel consumption related to eco-driving: Interaction of driving patterns and external factors
No full textEco-driving, as individual car-use behavior, is a cost-effective way of improving fuel efficiency, reducing CO2 emissions and other air pollutants like NOx. This paper aims to expand the knowledge on the short-term impacts of eco-driving by developing an analytical model of the key factors that explain fuel consumption and eco-driving, and to examine their relations in greater depth. Additionally, this paper analyses the effects on drivers' stress levels after eco-driving.An eco-driving field trial is applied to collect real data of 1156 trips, using two vehicles and 24 drivers (42% Female; Age, M = 30.15; Years of driving experience, M = 10.30) in two Spanish cities with different road characteristics. A sequential method involving factor analysis, regression analysis and path analysis is used to analyze the sample.The results confirm that eco-driving is strongly affected by driving behavior like deceleration rate, RPM and speed, also showing that external factors as congestion and road slope have a direct influence on fuel consumption. The results also reveal that perceived stress levels vary among drivers, but there is not significant change when drivers eco driving
Molecular Determinants of Selectivity in Disordered Complexes May Shed Light on Specificity in Protein Condensates
No full textBiomolecular condensates challenge the classical concepts of molecular recognition. The variable composition and heterogeneous conformations of liquid‐like protein droplets are bottlenecks for high‐resolution structural studies. To obtain atomistic insights into the organization of these assemblies, here we have characterized the conformational ensembles of specific disordered complexes, including those of droplet‐driving proteins. First, we found that these specific complexes exhibit a high degree of conformational heterogeneity. Second, we found that residues forming contacts at the interface also sample many conformations. Third, we found that different patterns of contacting residues form the specific interface. In addition, we observed a wide range of sequence motifs mediating disordered interactions, including charged, hydrophobic and polar contacts. These results demonstrate that selective recognition can be realized by variable patterns of weakly defined interaction motifs in many different binding configurations. We propose that these principles also play roles in determining the selectivity of biomolecular condensates
[Braulio Hernandez]
No full textPhotograph of Braulio Hernandez visiting a grave. Text on the back of the photograph reads: "Braulio Hernandez visiting grave of friend killed in battle May 1911." The grave marker to the right reads: "MARIANO RIOS, FALLECIO A LOS 27 ANOS DE EDAD, MAYO 11 DE 1911, El Paso, Texas." The small headstone in the center reads: "Capitan D. Madrid." A car is visible in the background
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Dr. Hector P. Garcia sits between National Queen Priscilla D. Hernandez and a lady guest (photograph)
No full textDr. Hector P. Garcia sits between National Queen Priscilla D. Hernandez and a lady guest
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