A5011309102- Opinion Dynamics and Social Influence
- Complex Network Analysis Techniques
- Transportation Planning and Optimization
- Complex Systems and Time Series Analysis
- Traffic control and management
- Birth, Development, and Health
- Urban Design and Spatial Analysis
- Evolutionary Game Theory and Cooperation
- Thyroid Disorders and Treatments
- Cellular Automata and Applications
- Ion channel regulation and function
- Hormonal Regulation and Hypertension
- Latin American Urban Studies
- Health Systems, Economic Evaluations, Quality of Life
- Drilling and Well Engineering
- Urban Transport and Accessibility
- Seismic Imaging and Inversion Techniques
- Hydraulic Fracturing and Reservoir Analysis
- Interdisciplinary Research and Collaboration
- Pregnancy and preeclampsia studies
- Educational methodologies and cognitive development
- Samuel Beckett and Modernism
- Conflict, Peace, and Violence in Colombia
- American and British Literature Analysis
- Social Media in Health Education
Universidad de Los Andes
2013-2024
University of Chile
1997-2023
University of Talca
2022
Universidad de Navarra
2016-2022
Stockholm Environment Institute
2022
Canadian University of Dubai
2022
Buenos Aires Institute of Technology
2019-2020
University of Antofagasta
2017
Universitat de Barcelona
2016
Universidad de La Sabana
2014
Fetal exposure to maternal glucocorticoids may determine fetal growth and the programing of later disorders. Availability in placenta is regulated by 11beta-hydroxysteroid dehydrogenase (11beta-HSDs) enzymes. To date, there are discrepancies with regard cortisol (F) cord blood levels fetuses intrauterine retardation different species. Objective study expression activity 11beta-HSDs placentas from full term small for gestational age (SGA), appropriate (AGA) large (LGA) newborns,...
Many high-profile societal problems involve an individual or group repeatedly attacking another - from child-parent disputes, sexual violence against women, civil unrest, violent conflicts and acts of terror, to current cyber-attacks on national infrastructure ultrafast cyber-trades stockholders. There is urgent need quantify the likely severity timing such future acts, shed light perpetrators, identify intervention strategies. Here we present a combined analysis multiple datasets across all...
Previous epidemiological studies have shown a significant statistical correlation (P < 0.005 to P 0.0005) between goiter prevalence and rock types in the watersheds that supply 37 localities Western Colombia. Bacterial contamination has also been implicated as cause of endemic goiter. We, therefore, did bacteriological incorporate this variable into model 34 previously surveyed. Samples water were taken at source or intake pipeline system households schools. collected sterile bottles...
We characterize the behavior and social structures appearing from a model of general interaction proposed by Sakoda. The consists two interacting populations in two-dimensional periodic lattice with empty sites. It contemplates set simple rules that combine attitudes, ranges interactions, movement decisions. analyze evolution 45 different via Potts-like energy function which drives system irreversibly to an equilibrium or steady state. discuss robustness structures, dynamical behaviors,...
Spatial segregation is a pressing issue in Latin American cities due to high urbanization, population density, and inequalities. This study examines patterns 84 middle large Colombia their relationship with the spatial configuration of using satellite data. The analysis focuses on evenness isolation metrics for ethnicity, education level, employment status. findings reveal higher level race/ethnicity terms dimension, status dimension. also identifies associations between built environment...
We study the impact of deserting a pre-established path, determined by navigation software, on overall city traffic. To do so, we consider cellular automaton model for vehicular traffic, where cars travel between two randomly assigned points in following three different strategies based minimization individual paths or times. found, general, that, above critical car density, transport improves all if decrease time that vehicles persist trying to follow particular strategy when route is...
Abstract Malignant hyperthermia (MH) is a hereditary myopathy, triggered when susceptible patients are exposed to depolarizing muscle relaxant and/or potent volatile anesthetics. We have studied the effects of dantrolene on free [Ca 2+ ] i intercostal biopsies obtained from two MH‐susceptible before and after administration orally (2.5 mg/kg for 3 days) intravenously (1.0 2 hours biopsy). The was measured by Ca ‐selective microelectrodes. mean resting in treatment 0.42 ± 0.01 μ M (mean SEM,...
In humans, IGF-I and -II have an important role in pre- postnatal growth. The IGFs circulate plasma principally as a ternary complex with the IGF binding protein-3 acid-labile subunit (ALS), which increases their half life.The objectives of study were to determine whether human placenta expresses mRNA protein for ALS evaluate any possible differences placentas from small (SGA) appropriate (AGA) or gestational age newborns.We studied 47 AGA 42 SGA pregnancies. IGF-I, IGF-II, protein-3,...
Abstract Calcium uptake and (Ca 2+ + Mg )‐ATPase were measured in sarcoplasmic reticulum (SR) vesicles prepared from muscles of eight patients susceptible to malignant hyperthermia (MH) control subjects. Intracellular resting free calcium level some the studied subjects was also determined. Both capacity activity significantly lower SR MH‐susceptible than normal Besides, these myoplasmic Ca increased. These results corroborate previous suggestions that abnormal function membrane related MH syndrome.
<i>Background:</i> Glucocorticoid excess promotes visceral obesity and cardiovascular disease. Ligand availability to the glucocorticoid receptor is controlled by isoforms of 11β-hydroxysteroid dehydrogenase (11β-HSD) which converts endogenous cortisone active cortisol. <i>Aim:</i> To evaluate expression activity 11β-HSD1 in subcutaneous adipose tissue (SC) (VAT) prepubertal children with normal weight. <i>Methods:</i> Fourteen patients (11 female/3 male)...
This paper explores the spatial variations of statistical scaling features low to high latitude geomagnetic field fluctuations at Swarm altitude. The data for this study comes from vector magnetometer onboard A satellite, measured resolution (1 Hz) one year (from 9 March 2016, 2017). We estimated structure-function exponents using p-leaders discrete wavelet multifractal technique, which we obtained singularity spectrum related magnetic in North-East-Center (NEC) coordinate system. From...
Abstract In this paper, we study consensus behavior based on the local application of majority algorithm (a generalization rule) over four-connected bi-dimensional networks. context, characterize theoretically every four-vicinity network in its capacity to reach (every individual at same opinion) for any initial configuration binary opinions. Theoretically, determine all regular grids with four neighbors which is reached and ones not. addition, those instances not reached, statistically...
We compared thyroid function between newborns from goitrous and nongoitrous localities in which iodine intake has been supplemented since 1955. Cord serum samples were analyzed 185 infants born during a 9-month period (1986-1987) 2 1 of western Colombia. Urinary was determined all mothers before delivery. No significant differences found among neonates the 3 (Kruskal-Wallis test) for various hormone values, values within normal range, although there trend distribution TSH to higher both...
This work presents the development of a new model for exhaust gas temperature based on both basis function expansion and Brayton cycle. is power generated, ambient temperature, compression rate, each combustion chamber. last unknown, but could be estimated. The functions also include spatial distribution chamber gases swirl angle surface. Thus, path in turbine, base related to particular main assumption that allows solving fault detection isolation problem turbines at level chambers. As...
We revisited the global traffic light optimization problem through a cellular automata model, which allows us to address relationship between lights and car routing. conclude that both aspects are not separable. Our results show good routing strategy weakens importance of period for mid-densities, thus limiting parameter space where such is relevant. This confirmed by analyzing travel time normalized shortest path origin destination. As an unforeseen result, we report what seems be power-law...
Medical treatment, patient satisfaction, and hospital brand equity are positively related to three communication contexts: interpersonal, internal, corporate. To integrate those contexts expand that line of research, visceral analysis suggests social networks transforming the impact institutional communications conducted by hospitals. Specifically, questions continue need answered fill gaps in, clarify reinforce previous research. end, this article analyzes strategic media in spreading...
Abstract The stochastic dynamics of conserved quantities is an emergent phenomena observed in many complex systems, ranging from social and to biological networks. Using extension the Ehrenfest urn model on a network, over which quantity transported random fashion, we study elementary packets through network by means master equation approach compare with mean field approximation simulations. By use theory, it possible compute ensemble average evolution number each node which, thermodynamic...
The SALURBAL (Urban Health in Latin America) Project is an interdisciplinary multinational network aimed at generating and disseminating actionable evidence on the drivers of health cities America. We conducted a temporal multilayer analysis where we measured cohesion over time using structural properties assessed diversity within between different project activities according to participant attributes. Between 2017 2020 comprised 395 participants across 26 countries, 23 disciplines, 181...