Browsing Productos de investigación by Title
Now showing items 325-344 of 798
-
Experiences with the use of Snap Circuits and Arduino boards as tools for human development with students in an insular Colombian community
(Latin American and Caribbean Consortium of Engineering Institutions, 2018)Insular communities in Colombia have had significant lags in human development. As a strategy to help overcome these shortcomings, this paper proposes the use of technological tools such as Snap Circuits and Arduino boards. ... -
Experimental and numerical analysis of a water emptying pipeline using different air valves
(MDPI AG, 2017)The emptying procedure is a common operation that engineers have to face in pipelines. This generates subatmospheric pressure caused by the expansion of air pockets, which can produce the collapse of the system depending ... -
Experimental data on the production and characterization of biochars derived from coconut-shell wastes obtained from the Colombian Pacific Coast at low temperature pyrolysis
(Elsevier Inc., 2020)Biochars are emerging eco-friendly products showing outstanding properties in areas such as carbon sequestration, soil amendment, bioremediation, biocomposites, and bioenergy. These interesting materials can be synthesized ... -
Experimental investigation of high-speed melt spinning by means of digital image analysis
(OSA - The Optical Society, 2016)We carry out an experimental characterization via high-speed camera of Chill-Block Melt Spinning process by means of digital optical flow for melt ejection velocity calculation and temperature measurement. © OSA 2016. -
Extension of the B3LYP-dispersion-correcting potential approach to the accurate treatment of both inter-and intra-molecular interactions
(2013)We recently demonstrated that dispersion-correcting potentials (DCPs), which are atom-centered Gaussian-type functions that were developed for use with B3LYP (Torres and DiLabio in J Phys Chem Lett 3:1738-1744, 2012), ... -
Fabrication of carbon nanofibrous microelectrode array (CNF-MEA) using nanofiber immersion photolithography
(Institute of Electrical and Electronics Engineers Inc., 2014)Microelectrode arrays (MEAs) are widely used for stimulating and receiving electrical signals between human and machines and for in vitro neural study. This work demonstrates the fabrication process of nanofibrous 3D ... -
Factors that affect quality of work life of the millennials linked to the commercial sector in Colombia
(Cartagena de Indias, 2021-05-01)The present investigation has two aims: (1) to empirically examine the factors that affect QWL among the millennials working in the commercial sector in Colombia and (2) to investigate the role of a set of individual ... -
Failures Identification in Refrigeration Equipment
(Cartagena de Indias, 2020-12-24)A refrigerator is an essential element in the preservation of perishable products; if there is some damage, its poorly performance prevents to guarantee the quality of the products contained in it, because the temperature ... -
Failures Monitoring in Refrigeration Equipment
(Springer Verlag, 2018)The refrigerators are the responsible to assure the temperature and humidity conditions for perishable products stored in it. In this sense, it is necessary to guarantee its good performance at all times in order to preserve ... -
Features of dengue and chikungunya infections of colombian children under 24 months of age admitted to the emergency department
(Oxford University Press, 2018)We aimed to assess clinical and laboratory differences between dengue and chikungunya in children <24 months of age in a comparative study. We collected retrospective clinical and laboratory data confirmed by NS1/IgM for ... -
Fetal ECG extraction using independent component analysis by Jade approach
(SPIE, 2017)Fetal ECG monitoring is a useful method to assess the fetus health and detect abnormal conditions. In this paper we propose an approach to extract fetal ECG from abdomen and chest signals using independent component analysis ... -
Finding a voice through research
(SAGE Publications Ltd, 2006)One question guided this experimental study: What impact does the change from teacher training to educational research have on university teachers' methodology and attitudes to teaching? To find answers to this question, ... -
Fiscal impacts and cross-border effects of a change in state liquor policy
(Cartagena de Indias, 2020-07)This paper analyzes the economic effects of the 2012 change in liquor policy (Initiative 1183) in Washington State in the United States. This policy increased the availability of liquor but also increased taxes on liquor ... -
Flexible Liquid Crystal Polymer based complementary split ring resonator loaded quarter mode substrate integrated waveguide filters for compact and wearable broadband RF applications
(Institute of Electrical and Electronics Engineers Inc., 2014)In this paper the flexible Liquid Crystal Polymer (LCP) substrate is used to implement broadband wearable/foldable conformal bandpass filters that use compact cavity resonators working under the principle of quarter mode ... -
Fractional Fourier analysis of random signals and the notion of α -Stationarity of the Wigner-Ville distribution
(2013)In this paper, a generalized notion of wide-sense α-stationarity for random signals is presented. The notion of stationarity is fundamental in the Fourier analysis of random signals. For this purpose, a definition of the ... -
Fractional sampling theorem for -bandlimited random signals and its relation to the von neumann ergodic theorem
(Institute of Electrical and Electronics Engineers Inc., 2014)Considering that fractional correlation function and the fractional power spectral density, for -stationary random signals, form a fractional Fourier transform pair. We present an interpolation formula to estimate a random ... -
Fracture Dynamic Analysis of Cracked Reissner Plates Using the Boundary Element Method
(Cartagena de IndiasIngeniería Mecánica, 2020-05-15)This work presents a Dual Boundary Element Method/Dual Reciprocity Boundary Element Method formulation for the dynamic analysis of fractured shear deformable plates. Equations for the Dual Boundary Element Method, including ... -
Fringe quality map for fringe projection profilometry in LabVIEW
(Sociedad Espanola de Optica, 2018)The phase retrieval process is mainly affected by local shadows, irregular surface brightness and fringe discontinuities. To overcome these problems, image-processing strategies are carried out such as binary masks, ... -
From a Home-Area-Network to a Secure Internet of Things Application
(Springer, 2019)In this paper, we present a secure system to control devices at home through the web, which we implement based on the Do It Yourself (DIY) culture. We use a model based on the Goal Question Metric approach to evaluate the ... -
Fuzzy logic methodology to study the behavior of energy transformation processes based on statistics T2and Q
(Cartagena de Indias, 2020-10)In the processes of energy transformation, to carry out an adequate follow-up of the process parameters represent an opportunity to propose strategies to improve the processes' performance. For this reason, it is essential ...
