Results 21 to 30 of about 557 (133)

Técnicas para caracterización de espumas de asfalto

open access: yesCiencia e Ingeniería Neogranadina, 2019
En la estabilización de suelos y en el reciclaje de pavimentos, se ha considerado que la relación de expansión y la vida media defnen relativamente bien la calidad de las espumas de asfalto.
Sandra Ximena Campagnoli   +2 more
doaj   +4 more sources

Design of an Emulgel‐Type Cosmetic with Antioxidant Activity Using Active Essential Oil Microcapsules of Thyme (Thymus vulgaris L.), Cinnamon (Cinnamomum verum J.), and Clove (Eugenia caryophyllata T.)

open access: yesInternational Journal of Polymer Science, Volume 2018, Issue 1, 2018., 2018
Essential oils (EO) are complex mixtures of biosynthesized chemicals basically by plants, which provide them their characteristic aroma. Many have biologically recognized activities as antioxidants and anti‐inflammatory among others, and many of them are employed as cosmetic actives. Very often, these properties are not fully exploited because of their
Glicerio Leon-Méndez   +6 more
wiley   +1 more source

Impact of changing location and power of a PV system in electrical distribution networks, integrating MATLAB and OpenDSS

open access: yesDyna, 2018
This paper presents the electrical impact of connecting a photovoltaic (PV) system without storage to the electric distribution network 13-bus IEEE test case, integrating MATLAB and OpenDSS using a fluctuated vector of irradiance as an input for the PV ...
Javier Andrés Ruíz-Garzón   +2 more
doaj   +1 more source

Generation and Control of Basic Geometric Trajectories for a Robot Manipulator Using CompactRIO®

open access: yesJournal of Robotics, Volume 2017, Issue 1, 2017., 2017
The utility of a robot manipulator focuses on the ability to locate its end effector in a position with a determined orientation following a specified trajectory. For this, algorithms were used in order to generate and control the movements joints of robot in a synchronized way.
Jorge Luis Aroca Trujillo   +3 more
wiley   +1 more source

Diseño y desarrollo de un dispositivo electrónico para transmisión de datos con cobertura universal

open access: yesIngeniería e Investigación, 2015
Este artículo presenta el diseño y desarrollo de un dispositivo electrónico con cobertura celular y satelital para la localización y el rastreo de activos móviles en Colombia (transporte público, transporte de carga).
Hernan Paz Penagos   +2 more
doaj   +1 more source

Assessment of the Compressive Strength of Lime Mortars with Admixtures, Subjected to Two Curing Environments

open access: yesIngeniería e Investigación, 2021
This article presents the assessment of the compressive strength of three types of lime mortar, one without admixture and the remaining two added with metakaolin and brick dust.
Andrés Felipe Espitia Morales   +1 more
doaj   +1 more source

A multiscale approach to evaluate the effect of different extraction and pre‐treatment methodologies on physicochemical properties of cashew (Anacardium occidentale L.) nut shell liquid

open access: yesJournal of Chemical Technology &Biotechnology, Volume 101, Issue 2, Page 266-275, February 2026.
Abstract BACKGROUND Cashew nutshell liquid (CNSL) is an agro‐industrial residue from cashew production that has gained relevance due to its possibilities to generate valuable by‐products. Although lab‐scale CNSL extraction has been studied in terms of yield and energy efficiency, the effect of industrial‐scale extraction and nut pre‐treatment methods ...
Johan León   +7 more
wiley   +1 more source

Asymptotic behavior of solutions of the damped Boussinesq equation in two space dimensions

open access: yesInternational Journal of Mathematics and Mathematical Sciences, Volume 22, Issue 1, Page 131-145, 1999., 1999
The Cauchy problem for the damped Boussinesq equation with small initial data is considered in two space dimensions. Existence and uniqueness of its classical solution is proved and the solution is constructed in the form of a series. The major term of its long‐time asymptotics is calculated explicitly and a uniform in space estimate of the residual ...
Vladimir V. Varlamov
wiley   +1 more source

Impacto de la toma de conciencia en las organizaciones

open access: yesSignos, 2017
El objetivo del presente artículo es determinar los impactos económicos, ambientales y de seguridad y salud en el trabajo, ocasionados por la ausencia de toma de conciencia en las organizaciones.
Shirley Katherine Contreras Sanabria   +2 more
doaj   +1 more source

Initial teacher training in engineering: a case study

open access: yesDyna, 2022
The quality of teachers and their teaching is an important factor in accounting for the student's learning outcomes at the end of their engineering training.
Hernan Paz-Penagos   +2 more
doaj   +1 more source

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