755 research outputs found
Incidence of complications in breast reconstruction with autologous tissue in a third level hospital
Background: The objective of this study is to analyze the incidence of complications after breast reconstruction with pedicled or free flaps at the hospital general de Mexico "Dr. Eduardo Liceaga”.
Methods: A retrospective, single-center study, including 44 female patients, who underwent immediate or delayed breast reconstruction after breast cancer, between 2019 and 2020, and had at least a 2-year follow up, evaluating the association between patient risk factors (age, history of radiotherapy, presence of overweight or obesity and immediate or delayed reconstruction) with the presence of complications such as seroma, hematoma, wound infection or wound dehiscence. We analyzed data with SPSS software, v23.0.
Results: There was no statistically significant difference for the presence of complications associated with risk factors studied.
Conclusions: We need more prospective, multicenter studies, including larger sample and strict follow up of patients
3D printed scaled setup for smoke transport analysis in a subterranean passenger platform
In this work, the study of smoke fire transportation inside of a subway passenger platform is presented. The study includes a set of numerical simulations to observe the behavior of the smoke inside the platform. Two smoke transport simulations using the FDS program are also included. Subsequently, the development of a 3D - 1:100 scale model is described and it was used to perform an experimental observation of the phenomenon. The model was built by using a 3D printer which allowed to include more architectural details of the real scenario. The inclusion of these details allowed to observe qualitative similarity between the results of the simulation and the experimental work. Although there are clear differences between what could happen in a real scenario and what was observed in the scale model, it was identified that the model is an important complement to the simulations. In addition to the simulations, the use of this type of 3D models allows the observation of the phenomenon by different specialists such as firefighters, policeman, medical personnel, etc., in the same place and its intention is to provide a more interactive tool to the observation group, increasing the time devoted to the development of contingency actions and reducing the costs associated with the logistics of a real simulacrum. The model allows to better identify the strengths, opportunities, weaknesses and threats of the contingency procedures developed by the safety and hygiene groups and to make their corresponding adjustments if necessary.Peer Reviewe
Estudio preliminar sobre el desperdicio de alimentos en la cafetería de la Facultad de Ciencias Biológicas
En esta investigación se estimó el desperdicio de
alimento, generado por una población (1000 personas)
constituida por estudiantes y profesores de la Facultad
de Ciencias Biológicas (FCB) de la Universidad
Autónoma de Nuevo León (UANL). Este desperdicio
corresponde al residuo de comida rápida y residuos de
platos generados de la comida buffet, estimado según
lo señalado por la población (durante su estancia en
la universidad), a través de un cuestionario diseñado
y aplicado en línea utilizando la plataforma SIASE
(Sistema Integral para la administración de Servicios
educativos de la UANL). El estudio tuvo como objetivo
conocer las características del consumidor (según edad,
poder adquisitivo e índice de masa corporal), sus hábitos
de consumo y el residuo que genera, según su tipo y
cantidad. Los resultados muestran que el 70% de los
estudiantes tiene un peso corporal normal (IMC=25), la
mayoría (96%) de ellos se encuentra en el rango de edad
entre 18 a 28 años y más de la mitad (55%) destina
entre 20 y 50 pesos para comprar alimentos. Estos
datos, sugieren que la población estudiantil tiene un
presupuesto limitado para alimentarse en la universidad,
lo cual es congruente con su baja frecuencia de
consumo por semana (2 o 3 veces). Lo anterior refiere
que el poder adquisitivo influye en la preferencia que
tienen los estudiantes por alimentos económicos como:
galletas, pan, chilaquiles, hot dog, tacos, tortas, papas
fritas con queso y bebidas embotelladas (refresco
y jugos). Respecto a la población de profesores el
61% posee un IMC>25, gasta entre 100 en
la compra de alimentos y genera residuos de platos
tales como: carne, pollo o pescado (10%); arroz o
pastas (10%); además, ensalada o verduras (20%),
pan o tortillas (15%) y bebidas gaseosas (>20% de su
volumen). Con base en los resultados del cuestionario,
adicionalmente se diseñaron menús económicos
(30.00 pesos) que contienen subproductos
de alimentos producidos durante su preparación, con el
fin de promover hábitos de alimentación más saludables
en los estudiantes e implementar una estrategia de
reducción del desperdicio, resultados que no evaluamos
en esta investigación. Este estudio preliminar de
estimación de desperdicios alimentarios esboza
algunos de los factores requeridos para determinar en
futuras investigaciones, la magnitud de los desperdicios
alimentarios y cuantificar sus efectos en el ámbito
económico, social y ambiental. El conocimiento de
esta magnitud podría utilizarse como referencia para
proponer la estrategia de reducción de los residuos de
alimentos
Red wine polyphenols prevent metabolic and cardiovascular alterations associated with obesity in Zucker fatty rats (Fa/Fa)
Peer reviewedPublisher PD
All-particle cosmic ray energy spectrum measured by the HAWC experiment from 10 to 500 TeV
We report on the measurement of the all-particle cosmic ray energy spectrum
with the High Altitude Water Cherenkov (HAWC) Observatory in the energy range
10 to 500 TeV. HAWC is a ground based air-shower array deployed on the slopes
of Volcan Sierra Negra in the state of Puebla, Mexico, and is sensitive to
gamma rays and cosmic rays at TeV energies. The data used in this work were
taken from 234 days between June 2016 to February 2017. The primary cosmic-ray
energy is determined with a maximum likelihood approach using the particle
density as a function of distance to the shower core. Introducing quality cuts
to isolate events with shower cores landing on the array, the reconstructed
energy distribution is unfolded iteratively. The measured all-particle spectrum
is consistent with a broken power law with an index of prior to
a break at ) TeV, followed by an index of . The
spectrum also respresents a single measurement that spans the energy range
between direct detection and ground based experiments. As a verification of the
detector response, the energy scale and angular resolution are validated by
observation of the cosmic ray Moon shadow's dependence on energy.Comment: 16 pages, 11 figures, 4 tables, submission to Physical Review
Constraining the Ratio in TeV Cosmic Rays with Observations of the Moon Shadow by HAWC
An indirect measurement of the antiproton flux in cosmic rays is possible as
the particles undergo deflection by the geomagnetic field. This effect can be
measured by studying the deficit in the flux, or shadow, created by the Moon as
it absorbs cosmic rays that are headed towards the Earth. The shadow is
displaced from the actual position of the Moon due to geomagnetic deflection,
which is a function of the energy and charge of the cosmic rays. The
displacement provides a natural tool for momentum/charge discrimination that
can be used to study the composition of cosmic rays. Using 33 months of data
comprising more than 80 billion cosmic rays measured by the High Altitude Water
Cherenkov (HAWC) observatory, we have analyzed the Moon shadow to search for
TeV antiprotons in cosmic rays. We present our first upper limits on the
fraction, which in the absence of any direct measurements, provide
the tightest available constraints of on the antiproton fraction for
energies between 1 and 10 TeV.Comment: 10 pages, 5 figures. Accepted by Physical Review
Analysis of gender equality competence present in cultural positions
Articulating the gender dimension in organizations is not easy because their members have to be trained to adopt positions that facilitate the implementation of solutions that help to combat inequalities. The aim of this article was to identify the gender equality competence present in the three types of cultural positions Castells proposed in members of a City Council in Sevilla-Spain, who wanted to implement gender mainstreaming. The participants were 27 people (16 women and 11 men). The method used was discourse analysis. The obtained results show that, while all competences were present in the project position, in the resistance position, there was none. In the legitimizers, we observed inconsistency in the discourse presented. This arouses considerations on the importance of knowing the gender equality competences in order to implement gender mainstreaming in organization
The Effect of a Physical Activity Program on the Total Number of Primary Care Visits in Inactive Patients: A 15-Month Randomized Controlled Trial
Abstract
Background: Effective promotion of exercise could result in substantial savings in healthcare cost expenses in terms of
direct medical costs, such as the number of medical appointments. However, this is hampered by our limited knowledge of
how to achieve sustained increases in physical activity.
Objectives: To assess the effectiveness of a Primary Health Care (PHC) based physical activity program in reducing the total
number of visits to the healthcare center among inactive patients, over a 15-month period.
Research Design: Randomized controlled trial.
Subjects: Three hundred and sixty-two (n = 362) inactive patients suffering from at least one chronic condition were
included. One hundred and eighty-three patients (n = 183; mean (SD); 68.3 (8.8) years; 118 women) were randomly allocated
to the physical activity program (IG). One hundred and seventy-nine patients (n = 179; 67.2 (9.1) years; 106 women) were
allocated to the control group (CG). The IG went through a three-month standardized physical activity program led by
physical activity specialists and linked to community resources.
Measures: The total number of medical appointments to the PHC, during twelve months before and after the program, was
registered. Self-reported health status (SF-12 version 2) was assessed at baseline (month 0), at the end of the intervention
(month 3), and at 12 months follow-up after the end of the intervention (month 15).
Results: The IG had a significantly reduced number of visits during the 12 months after the intervention: 14.8 (8.5). The CG
remained about the same: 18.2 (11.1) (P = .002).
Conclusions: Our findings indicate that a 3-month physical activity program linked to community resources is a shortduration,
effective and sustainable intervention in inactive patients to decrease rates of PHC visits.
Trial Registration: ClinicalTrials.gov NCT0071483
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