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Gonzalez M.V.,National Autonomous University of Mexico | Jaime-Acuna O.E.,Research Center Cientifica Educacion Superior Of Ensenada | Escobar-Alarcon L.,ININ | Pawelec B.,ICP CSIC | Fierro J.L.G.,ICP CSIC
Applied Catalysis B: Environmental | Year: 2013

TiO2 and Fe(S)-doped TiO2 photocatalysts have been synthetized by a microwave-assisted method and deeply characterized by means of several techniques (N2 adsorption-desorption isotherms, scanning electron microscopy (SEM), TEM, high resolution transmission electron microscopy (HRTEM), powder X-ray diffraction (XRD), temperature-programmed desorption of NH3 (TPD-NH3) and UV-vis diffuse reflectance, Raman and XPS spectroscopic techniques). The synthetized samples were tested in the photodegradation of methyl red dye under UV irradiation at room temperature. Depending on the temperature and duration of the microwave synthesis, some changes in the textural and crystalline structure of the titanium dioxide were observed which influenced on the photocatalytic activity. The best photocatalyst found in this study was the one doped with S (0.1wt.%) prepared by microwave-assisted synthesis at 215°C for 60min and calcined at 550°C. The enhancement of color removal over this sample (49% of color removal) was associated to the formation of anatase phase and the enhancement of the sample acidity with respect to undoped TiO2 sample. A volcano-shaped curve was obtained for methyl red degradation against TiO2 crystal size. Catalyst calcination at 700°C led to a drastic drop in activity due to formation of large TiO2 crystals of rutile phase, as confirmed by XRD. © 2013 Elsevier B.V.

PubMed | University of Tübingen, McGill University, Tufts University, Gono University and 6 more.
Type: Journal Article | Journal: Physica medica : PM : an international journal devoted to the applications of physics to medicine and biology : official journal of the Italian Association of Biomedical Physics (AIFB) | Year: 2016

In photon brachytherapy (BT), experimental dosimetry is needed to verify treatment plans if planning algorithms neglect varying attenuation, absorption or scattering conditions. The detectors response is energy dependent, including the detector material to water dose ratio and the intrinsic mechanisms. The local mean photon energy E(r) must be known or another equivalent energy quality parameter used. We propose the brachytherapy photon radiation quality indexQ(BT)(E), to characterize the photon radiation quality in view of measurements of distributions of the absorbed dose to water, Dw, around BT sources.While the external photon beam radiotherapy (EBRT) radiation quality index Q(EBRT)(E)=TPR10(20)(E) is not applicable to BT, the authors have applied a novel energy dependent parameter, called brachytherapy photon radiation quality index, defined as Q(BT)(E)=Dprim(r=2cm,0=90)/Dprim(r0=1cm,0=90), utilizing precise primary absorbed dose data, Dprim, from source reference databases, without additional MC-calculations.For BT photon sources used clinically, Q(BT)(E) enables to determine the effective mean linear attenuation coefficient (E) and thus the effective energy of the primary photons Eprim(eff)(r0,0) at the TG-43 reference position Pref(r0=1cm,0=90), being close to the mean total photon energy Etot(r0,0). If one has calibrated detectors, published Etot(r) and the BT radiation quality correction factor [Formula: see text] for different BT radiation qualities Q and Q0, the detectors response can be determined and Dw(r,) measured in the vicinity of BT photon sources.This novel brachytherapy photon radiation quality indexQ(BT) characterizes sufficiently accurate and precise the primary photons penetration probability and scattering potential.

Camps I.,National Autonomous University of Mexico | Muhl S.,National Autonomous University of Mexico | Camps E.,ININ | Quinones-Galvan J.G.,ININ | Flores M.,University of Guadalajara
Surface and Coatings Technology | Year: 2014

The simultaneous ablation of silicon and titanium targets in a nitrogen atmosphere was performed in order to obtain the ternary compound TiSiN. The study showed that the plasma density played an important role in determining the composition and properties of the deposited thin films. The plasma parameters were measured using a planar Langmuir probe. The laser fluence applied to the silicon target was varied and this changed the silicon plasma density. The results demonstrated that the deposition rate and the silicon content in the films strongly depended on the plasma density. The composition measurements showed that the silicon content changed from 6 to 29at.% when the plasma density was increased from 1×1019m-3 to 1×1020m-3. The silicon ion energy was fixed at ~160eV. In order to determine the hardness, friction coefficient, wear resistance and adhesion of the coatings, the TiSiN films were deposited onto nitrided stainless steel substrates at low temperature (200°C) and a working pressure of 1.33Pa (Ar/N2 60/40). The overall results showed that the film hardness varied between 24 and 34GPa, the friction coefficient (in air) from 0.55 to 0.58 with a wear rate as low as 1.2×10-6mm3/Nm and the critical load of adhesion, measured by scratch testing, was between 30 and 64N. © 2014 Elsevier B.V.

Cardona D.,ININ | Cardona D.,National Autonomous University of Mexico | Camps E.,ININ | Escobar-Alarcon L.,ININ | Rodil S.E.,National Autonomous University of Mexico
Applied Physics A: Materials Science and Processing | Year: 2013

Compounds containing bismuth, iron and oxygen (BFO) can result in materials with important magnetic and electrical properties for high-technology applications. We plan to prepare such compounds using the simultaneous ablation of bismuth and iron oxide targets. For that reason in the first part of this work we study the plasmas and the materials produced by ablation of bismuth or Fe2O3 targets, and then the two plasmas are combined in order to deposit the BFO compounds. The individual plasmas were characterized using a Langmuir probe, in order to measure the mean kinetic ion energy (E p) and plasma density (Np). Bismuth and magnetite-Fe 3O4 thin films were obtained in high vacuum (2.7 × 10-4 Pa). Meanwhile for the deposition of α-Fe2O3 (hematite) or amorphous bismuth oxide thin films a reactive atmosphere (Ar/O2 = 80/20) was used. All depositions were made at room temperature. The bismuth thin films crystallized in the rhombohedral metallic system with preferential orientations that depended on the Bi-ion energy used. Bismuth oxide phases were only obtained after annealing of the Bi thin films at different temperatures. Iron oxide thin films reproducing the target stoichiometry were obtained at a certain value of iron-ion energy. Preliminary structural results of the BFO thin films obtained by the combination of the individual plasmas are presented. © Springer-Verlag 2012.

Camps E.,ININ | Escobar-Alarcon L.,ININ | Camps I.,National Autonomous University of Mexico | Muhl S.,National Autonomous University of Mexico | Flores M.,University of Guadalajara
Applied Physics A: Materials Science and Processing | Year: 2013

The simultaneous laser ablation of two targets (graphite and titanium) in an Ar-N2 gas mixture was carried out to deposit thin films of the ternary compound TiCN at room temperature. The base conditions used to produce the TiN without carbon were taken from our previous studies. The experimental conditions for the ablation of the carbon target were varied so that the carbon content in the films could be changed depending on the carbon ion energy. The control of the experimental conditions was carried out using a Langmuir planar probe which permitted the determination of the mean kinetic ion energy. The maximum hardness value of 35 GPa, was obtained with a carbon ion energy of about 250 eV, which corresponds to a film with 5 at% carbon content. In order to perform tribological and scratch tests, two types of substrate were used: nitrided AISI 316 stainless steel and AISI 316 stainless steel previously coated with a thin titanium layer (∼50 nm). Values of the wear rate in the range of 1.39 × 10-6 to 7.45 × 10-5 mm3 N-1m-1, friction coefficient from 0.21 to 0.28 and adhesion from scratch test measurements up to 80 N for final critical load, were obtained. © Springer-Verlag 2012.

SAN DIEGO & INDIANAPOLIS--(BUSINESS WIRE)--Shareholder rights law firm Robbins Arroyo LLP is investigating whether certain officers and directors of Interactive Intelligence Group, Inc. (NASDAQGS: ININ) breached their fiduciary duties to shareholders in connection with the sale of the company to Genesys Telecommunications Laboratories, Inc. ("Genesys"). Interactive Intelligence provides software and cloud services for customer engagement, communications, and collaboration worldwide. On August 31, 2016, Interactive Intelligence announced that it had signed a definitive merger agreement with Genesys. Under the terms of the transaction, Interactive Intelligence shareholders will receive $60.50 per share in cash. However, the Interactive Intelligence board of directors may not have adequately pursued alternatives to the acquisition or obtained the best possible price for Interactive Intelligence shares of common stock. For example, Interactive Intelligence stock traded at $80.47 per share on January 30, 2014, and a Wall Street analyst set a $67.00 per share price target for the company's stock. The transaction appears to undervalue the company and will result in a loss for Interactive Intelligence shareholders. View this press release on the law firm's Shareholder Rights Blog: Concerned shareholders who would like more information about their rights and potential remedies can contact attorney Darnell R. Donahue at (800) 350-6003,, or via the shareholder information form on the firm's website. Robbins Arroyo LLP is a nationally recognized leader in shareholder rights law. The firm represents individual and institutional investors in shareholder derivative and securities class action lawsuits, and has helped its clients realize more than $1 billion of value for themselves and the companies in which they have invested.

Gonzalez H.E.,ININ | Carmona L.J.J.,ININ
International Journal of Engineering and Technology Innovation | Year: 2015

In this paper a parallel code for solving simultaneous linear equations with real coefficients are used. We postulate a new linear transformation in matrix product form and we apply this linear transformation to a matrix (A) and next we apply again this linear transformation to a vector (b) and so we obtain Cramer Rule solution of the linear system of equations in efficient way. We use subroutines of cuBLAS 2nd and 3rd levels in double precision and we obtain correct numeric results.

INDIANAPOLIS--(BUSINESS WIRE)--#cctr--Zevacor has deployed the unified communications and collaboration cloud solution, PureCloud Communicate℠, from Interactive Intelligence Group Inc. (Nasdaq: ININ).

SAN DIEGO, Nov. 18, 2016 /PRNewswire/ -- Robbins Geller Rudman & Dowd LLP ("Robbins Geller") today announced that a class action has been commenced on behalf of holders of The Interactive Intelligence Group, Inc. ("Interactive Intelligence") (NASDAQ:ININ) common stock on September 30,...

INDIANAPOLIS & SLOUGH, U.K.--(BUSINESS WIRE)--#CCaaS--Interactive Intelligence Group Inc. (Nasdaq: ININ), a global provider of cloud services for customer engagement, communications and collaboration, has been positioned as a Visionary in the Gartner 2016 Magic Quadrant for Contact Center as a Service, Western Europe1 for the second year in a row. Interactive Intelligence is the only vendor to appear in all three Gartner contact center Magic Quadrants: the Magic Quadrant for Contact Center as a Service

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