Entity

Time filter

Source Type

Bucaramanga, Colombia

The Industrial University of Santander , also called UIS, is a public, coeducational, research university based primarily in Bucaramanga, Santander, Colombia. It is the largest by student population, and the top ranking university in northeast Colombia. The university was created by ordinance No. 83 of June 22, 1944, by the Departmental Assembly, and began its labors in March 1948. Its main campus, known also as Campus Universitario Principal , is located in the northeast part of the city and hosts the faculties of science, Engineering, and Humanities. Its also possesses a second campus, which hosts the faculty of Health, and a building known as the Sede Bucarica, which is a national monument. The university also has satellite campuses across the department in the cities of Barrancabermeja, Barbosa, Málaga, Piedecuesta, Socorro. The university offers education at undergraduate and postgraduate levels, with 124 academic programs, which includes 21 master, 9 medical residency programs, and 6 doctorates. Wikipedia.


Arguello H.,Industrial University of Santander | Arce G.R.,University of Delaware
IEEE Transactions on Image Processing | Year: 2014

Compressive spectral imaging (CSI) senses the spatio-spectral information of a scene by measuring 2D coded projections on a focal plane array. A ℓ1-norm-based optimization algorithm is then used to recover the underlying discretized spectral image. The coded aperture snapshot spectral imager (CASSI) is an architecture realizing CSI where the reconstruction image quality relies on the design of a 2D set of binary coded apertures which block-unblock the light from the scene. This paper extends the compressive capabilities of CASSI by replacing the traditional blocking-unblocking coded apertures by a set of colored coded apertures. The colored coded apertures are optimized such that the number of projections is minimized while the quality of reconstruction is maximized. The optimal design of the colored coded apertures aims to better satisfy the restricted isometry property in CASSI. The optimal designs are compared with random colored coded aperture patterns and with the traditional blocking-unblocking coded apertures. Extensive simulations show the improvement in reconstruction PSNR attained by the optimal colored coded apertures designs. © 2014 IEEE. Source


Patent
Industrial University of Santander | Date: 2013-08-28

The invention relates to a material consisting of hard fibers on which nanoparticles of metals or metal oxides, preferably period IV transition metal oxides, are deposited, using different techniques, said material being used in the degradation and removal of contaminants found in liquid matrices. The invention also relates to a method for the in situ synthesis thereof.


Patent
Industrial University of Santander | Date: 2012-08-31

The present invention consists of the use of a control rotary actuator coupled to a worm gear mechanism for changing the transmission ratio by varying the speed of the crown of the epicyclic gear mechanism. The claimed CVT is characterized by a combined mechanical system with a low power motor, which serves as a positioner. The design of the present invention is based on the use of a rotary control actuator worm gear instead of traditional continuously variable transmission pulleys or the continuously variable toroidal transmission, in order to modify the transmission ratio by varying the speed of the epicyclic crown mechanism. This continuously variable transmission does not require any clutch to vary the gear ratio or transmission throughout its operating range. The present invention does not use intentional friction forces in order to transmit the input power to the output of the existing forces, distinguishing itself from what already exists which are based on high frictional forces as a means to transmit torque or speed.


Patent
Industrial University of Santander | Date: 2012-08-31

The present invention discloses an X-ray source which uses a rectangular cavity resonator, which is excited with a microwave TE


Rodrigues R.C.,Federal University of Rio Grande do Sul | Ortiz C.,Industrial University of Santander | Berenguer-Murcia A.,University of Alicante | Torres R.,Industrial University of Santander | Fernandez-Lafuente R.,Institute Catalisis CSIC
Chemical Society Reviews | Year: 2013

Immobilization of enzymes may produce alterations in their observed activity, specificity or selectivity. Although in many cases an impoverishment of the enzyme properties is observed upon immobilization (caused by the distortion of the enzyme due to the interaction with the support) in some instances such properties may be enhanced by this immobilization. These alterations in enzyme properties are sometimes associated with changes in the enzyme structure. Occasionally, these variations will be positive. For example, they may be related to the stabilization of a hyperactivated form of the enzyme, like in the case of lipases immobilized on hydrophobic supports via interfacial activation. In some other instances, these improvements will be just a consequence of random modifications in the enzyme properties that in some reactions will be positive while in others may be negative. For this reason, the preparation of a library of biocatalysts as broad as possible may be a key turning point to find an immobilized biocatalyst with improved properties when compared to the free enzyme. Immobilized enzymes will be dispersed on the support surface and aggregation will no longer be possible, while the free enzyme may suffer aggregation, which greatly decreases enzyme activity. Moreover, enzyme rigidification may lead to preservation of the enzyme properties under drastic conditions in which the enzyme tends to become distorted thus decreasing its activity. Furthermore, immobilization of enzymes on a support, mainly on a porous support, may in many cases also have a positive impact on the observed enzyme behavior, not really related to structural changes. For example, the promotion of diffusional problems (e.g., pH gradients, substrate or product gradients), partition (towards or away from the enzyme environment, for substrate or products), or the blocking of some areas (e.g., reducing inhibitions) may greatly improve enzyme performance. Thus, in this tutorial review, we will try to list and explain some of the main reasons that may produce an improvement in enzyme activity, specificity or selectivity, either real or apparent, due to immobilization. © 2013 The Royal Society of Chemistry. Source

Discover hidden collaborations