6 research outputs found
The Audit Program of ANECA-CCA for Central America and the ISO 9001:2015 Standard - A Qualitative-Comparative Analysis
This article presents a comparative analysis of the quality management system model of the Audit program for Central America of ANECA-CCA and the requirements of the ISO 9001: 2015 standard for quality management systems. As a result of this article, an alignment is established between the contents of the Audit program for Central America of ANECA-CCA and the corresponding clauses of the ISO 9001: 2015 Standard.—Este artículo presenta un análisis comparativo de modelo del Sistema de gestión de la calidad del programa Audit para Centroamérica de ANECA-CCA y los requisitos de la Norma ISO 9001: 2015 para sistemas de gestión de la calidad. Como resultados de este artículo se establece una alineación
entre el contenido de las dimensiones del programa Audit para Centroamérica de ANECA-CCA y las correspondientes cláusulas de la Norma ISO 9001: 2015
Characterization of the dynamic behavior of transition systems between rigid and flexible catenary
—El estudio que se presenta tratará sobre el
comportamiento dinámico que existe ante la transición que se
produce a la entrada y salida de un túnel cuando en este último se
ha instalado catenaria rígida mientras en el exterior se mantienen
sistemas de catenaria flexible. La viga de transición utilizada es
un elemento que pretende mitigar las diferencias dinámicas en
la fuerza del contacto que se produce entre ambos tipos de
catenaria. Su geometría está basada en la viga de rígida, teniendo
el mismo perfil inicial y reduciendo su sección para disminuir la
rigidez. Los mecanismos actuales de catenaria rígida y transición
no permiten el paso a velocidades por encima de 100 km/h,
produciéndose pérdidas de contacto y arcos eléctricos que
aumentan el desgaste de los componentes considerablemente. El
presente trabajo se centra en la caracterización del comportamiento
dinámico de los sistemas de transición actuales entre tipos de
catenaria y propone una configuración alternativa que permita
reducir la pérdida de contacto entre componentes para velocidades
por encima del límite conocido. Esto permitirá aumentar el rango
de velocidades de explotación y la instalación de catenaria rígida en
un mayor ámbito, reduciendo las necesidades de galibo y en
consecuencia el diámetro de los túneles a crearThe study presented will deal with the dynamic behavior
that exists before the transition that occurs at the entrance and exit
of a tunnel when a rigid catenary has been installed in the latter
while flexible catenary systems are maintained abroad. The
transition beam used is an element that aims to mitigate the
dynamic differences in the strength of the contact that occurs
between both types of catenary. Its geometry is based on the rigid
beam, having the same initial profile and reducing its section to
reduce stiffness. The current rigid catenary and transition
mechanisms do not allow passage at speeds above 100 km / h,
resulting in loss of contact and electric arcs that increase the wear
of the components considerably. This paper focuses on the
characterization of the dynamic behavior of current transition
systems between types of catenary and proposes an alternative
configuration that allows reducing the loss of contact between
components for speeds above the known limit. This will allow
increasing the range of operating speeds and the installation of
rigid catenary in a larger area, reducing the needs of gauge and
consequently the diameter of the tunnels to be created.
The study presented will deal with the dynamic behavior that exists
before the transition that occurs at the entrance and exit of a tunnel when a rigid catenary has been installed in the latter while flexible
catenary systems are maintained abroad. The transition beam used
is an element that aims to mitigate the dynamic differences in the
strength of the contact that occurs between both types of catenary.
Its geometry is based on the rigid beam, having the same initial
profile and reducing its section to reduce stiffness. The current
rigid catenary and transition mechanisms do not allow passage at
speeds above 100 km / h, resulting in loss of contact and electric
arcs that increase the wear of the components considerably. This
paper focuses on the characterization of the dynamic behavior of
current transition systems between types of catenary and proposes
an alternative configuration that allows reducing the loss of contact
between components for speeds above the known limit. This will
allow increasing the range of operating speeds and the installation
of rigid catenary in a larger area, reducing the needs of gauge and
consequently the diameter of the tunnels to be create
Liquid-liquid displacement porometry to estimate the molecular weight cut-off of ultrafiltration membranes
Benign symmetric lipomatosis with lingual involvement: Case report and literature review
Stress neuropeptide levels in adults with chest pain due to coronary artery disease: potential implications for clinical assessment
: Substance P (SP) and neuropeptide Y (NPY) are neuropeptides
involved in nociception. The study of biochemical markers of pain in
communicating critically ill coronary patients may provide insight for pain
assessment and management in critical care. Purpose of the study was to
to explore potential associations between plasma neuropeptide levels and
reported pain intensity in coronary critical care adults, in order to test the
reliability of SP measurements for objective pain assessment in critical
care