Tavangarian F.,Isfahan University of Technology |
Tavangarian F.,Industrial Technology Group |
Emadi R.,Isfahan University of Technology
Ceramics International | Year: 2011
This is the first report of successful synthesis of pure spinel-forsterite nanocomposites from talc, alumina, and magnesium carbonate powders. Appropriate ratios of initial materials were mixed and mechanically activated in a planetary ball mill. The obtained powders were annealed at high temperatures. Pure spinel-forsterite nanocomposites with crystallites size in the range of 30-87 nm were obtained after 40 h of mechanical activation and subsequent annealing at 1200 °C for 1 h. The results of cold crushing strength (CCS) showed that the maximum strength of the fired spinel-forsterite bodies (∼67 MPa) can be obtained in those samples with 10 wt.% spinel. The bulk density (BD) and apparent porosity (AP) of these samples were 1.46% and 17%, respectively. © 2011 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
Mohamed Y.A.-R.I.,University of Alberta |
Radwan A.A.A.,University of Alberta |
Lee T.K.,Industrial Technology Group
IEEE Transactions on Industrial Electronics | Year: 2012
Reference-current-based active compensation techniques are widely used to actively damp the negative admittance effect associated with constant power loads in power electronic systems. These methods, however, yield strong coupling among the active compensator, speed, and current control dynamics when applied to motor drives. To overcome these difficulties, a new reference-voltage-based active compensator (RVC) is proposed to mitigate the negative admittance effect in permanent-magnet synchronous motor drives with tight-speed regulation. The proposed RVC suppresses the interaction dynamics between the compensator and motor drive dynamics in the low- and medium-frequency regions and maintains stability and effective damping performance along the whole loading trajectory of the motor drive. In addition, the proposed compensator has a very simple structure, and it can easily be augmented to existing motor drives with minimal interactions with existing drive control strategy and parameters. A theoretical comparative analysis and test results are provided to demonstrate the validity and effectiveness of the proposed technique. © 2011 IEEE.
Granstrand O.,Chalmers University of Technology |
Holgersson M.,Industrial Technology Group
International Journal of Technology Management | Year: 2014
This paper gives various indications of market and technology diversification as well as of global market and technology convergence (rather than specialisation) in the context of management, legal and economic convergence. The results show that different countries focus on a wider but increasingly similar set of markets for R&D outputs in the form of patents, which implies increasing intra-national market diversification and inter-national market convergence. The results also show that different countries focus on a wider but (to some extent) increasingly similar set of technologies that are patented, which implies increasing intra-national technology diversification and inter-national technology convergence. In addition, intellectual property (IP) legal convergence takes place as newly industrialised countries (NICs) have strengthened their IP regimes in compliance with TRIPS and subsequently do so in the context of their indigenous innovation policies. Asian NICs have significantly increased their international patenting and supply of patented inventions. Altogether, this puts new demands across countries on multinational technology and innovation management skills, and in particular multinational IP management skills. © 2014 Inderscience Enterprises Ltd.
Chan C.W.,Industrial Technology Group |
Man H.C.,Industrial Technology Group |
Yue T.M.,Industrial Technology Group
Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science | Year: 2012
NiTi wires of 0.5 mm diameter were laser welded using a CW 100-W fiber laser in an argon shielding environment with or without postweld heat-treatment (PWHT). The microstructure and the phases present were studied by scanning-electron microscopy (SEM), transmissionelectron microscopy (TEM), and X-ray diffractometry (XRD). The phase transformation behavior and the cyclic stress-strain behavior of the NiTi weldments were studied using differential scanning calorimetry (DSC) and cyclic tensile testing. TEM and XRD analyses reveal the presence of Ni4Ti3 particles after PWHT at or above 623 K (350 °C). In the cyclic tensile test, PWHT at 623 K (350 °C) improves the cyclic deformation behavior of the weldment by reducing the accumulated residual strain, whereas PWHT at 723 K (450 °C) provides no benefit to the cyclic deformation behavior. Welding also reduces the tensile strength and fracture elongation of NiTi wires, but the deterioration could be alleviated by PWHT. © The Minerals, Metals & Materials Society and ASM International 2012.
Oishi K.,Industrial Technology Group
Nihon rinsho. Japanese journal of clinical medicine | Year: 2012
The suprachiasmatic nucleus (SCN) is considered the master circadian pacemaker that controls most of the physical circadian rhythms of mammals including behavior. Studies of clock genes have implied that oscillatory mechanisms function in peripheral organs and isolated cells, and that they are entrained to the SCN. The circadian clock is an intracellular, transcriptional-translational mechanism that shares the same molecular components in the SCN and in peripheral cells. Hundreds of tissue-specific circadian genes that regulate an impressive diversity of biological processes have been identified using DNA microarray technology. This review summarized the recent information of clock and clock-controlled genes in mammals.
Pazos L.,Industrial Technology Group
IFMBE Proceedings | Year: 2015
The design of a trauma implant represents a challenge for manufacturers and mechanical design criteria are necessary to avoid repeated experimental tests. Particularly, the design of intramedullary nails could be optimized on the basis of theoretical evaluation. The goal of the study was to theoretically predict the static performance of six cannulated stainless steel intramedullary nails and compare the predictions with experimental measurements. The predicted values for the bending structural stiffness and the yield moment were determined using formulas of mechanics of materials for bending beams. The experimental data supported the theoretical models for predicting the mechanical performance of intramedullary nails. Basic concepts were introduced to contribute for the understanding of mechanical design criteria of intramedullary nails. © Springer International Publishing Switzerland 2015.
Vera-Jimenez N.I.,Industrial Technology Group |
Nielsen M.E.,Industrial Technology Group
Molecular Immunology | Year: 2013
Wound healing and tissue regeneration are essential mechanisms to ensure the survival and health of any organism. Despite this, only a few studies have been devoted to study tissue regeneration during wound healing in fish. Reactive oxygen species (ROS), in particular hydrogen peroxide, play an important dual role both for promoting tissue repair, but also for eradication of pathogens. This study aims at dissecting the contribution of PAMPs (using β-glucan) and DAMPs in the respiratory burst response of carp head kidney-derived leukocytes, and address their contribution to wound healing processes. Consistent with a pathogen eradication strategy, ROS responses to PAMP stimulation (β-glucan) was fast, vigorous and highly dominated by production of superoxide anion. In contrast, stimulation with DAMPs led to a slow, subtle but long-lasting production of oxygen radicals dominated by hydrogen peroxide. Using an in vitro model of scratch-wounded CCB fibroblast cell cultures and a novel PhotoID proliferation assay, stimulation with low and continuous levels of hydrogen peroxide (5. μM) led to a slight increase in the percentage of wound recovery and thus promoted wound closure. In contrast, high doses of hydrogen peroxide (300. μM) impaired fibroblast scratch-wound recovery and caused cell death. These results elucidate the capacity of hydrogen peroxide to influence the fate of tissue regeneration through the establishment of environments suitable for promoting either tissue regeneration or oxidative stress and thereby potential tissue damage. Direct in vitro stimulation with β-glucans did not impact fibroblast scratch-wound recovery, which further suggests that interaction with tissue-resident leukocytes or other components of the fish immune system are required to induce fibroblast proliferation and thus for the accelerated wound healing promoted by β-glucan stimulation. © 2013 Elsevier Ltd.
Chan H.-T.,Industrial Technology Group |
Bhat R.,Industrial Technology Group |
Karim A.A.,Industrial Technology Group
Food Chemistry | Year: 2010
Effects of sodium dodecyl sulphate (SDS) and sonication treatment on physicochemical properties of starch were studied on four types of starch, namely, corn, potato, mung bean, and sago. The SDS and sonication treatments caused a significant reduction of protein content for all the starches. The SDS treatment did not cause apparent damage on granular structure but sonication appeared to induce changes such as rough surface and fine fissures on starch granules. The combination of SDS and sonication increased amylose content for all starches. This could be attributed to the removal of surface protein by SDS and structural weakening by sonication which facilitated amylose leaching from swollen starch granule. The X-ray pattern for all starches remained unchanged after SDS treatment, suggesting no complexation of amylose-SDS had occurred. Combined SDS-sonication treatment increased swelling and solubility of corn, mung bean, and potato starch. The treated starches showed significant increase in peak viscosity with reduction in pasting temperature, except for potato starch. Results of the present study indicate the possibilities of exploring SDS and sonication treatments for starch modifications. © 2009 Elsevier Ltd. All rights reserved.
Industrial Technology Group | Date: 2016-02-23
Systems and methods for physical asset inspection are provided. According to one embodiment, a probe is positioned to multiple data capture positions with reference to a physical asset. For each position: odometry data is obtained from an encoder and/or an IMU; a 2D image is captured by a camera; a 3D sensor data frame is captured by a 3D sensor, having a view plane overlapping that of the camera; the odometry data, the 2D image and the 3D sensor data frame are linked and associated with a physical point in real-world space based on the odometry data; and switching between 2D and 3D views within the collected data is facilitated by forming a set of points containing both 2D and 3D data by performing UV mapping based on a known positioning of the camera relative to the 3D sensor.