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Ich'ŏn, South Korea

Kwon J.-T.,Seoul National University | Kwon J.-T.,National Institute of Environmental Research | Minai-Tehrani A.,Seoul National University | Hwang S.-K.,Seoul National University | And 14 more authors.
Toxicological Research | Year: 2012

The purpose of this study was to determine the acute pulmonary toxicity of metallic silver nanoparticles (MSNPs, 20.30 nm in diameter). Acute pulmonary toxicity and body distribution of inhaled MSNPs in mice were evaluated using a nose-only exposure chamber (NOEC) system. Bronchoalveolar lavage (BAL) fluid analysis, Western blotting, histopathological changes, and silver burdens in various organs were determined in mice. Mice were exposed to MSNPs for 6 hrs. The mean concentration, total surface area, volume and mass concentrations in the NOEC were maintained at 1.93 × 107 particles/cm3, 1.09 × 1010 nm2/cm3, 2.72 × 1011 nm3/cm3, and 2854.62 μg/m3, respectively. Inhalation of MSPNs caused mild pulmonary toxicity with distribution of silver in various organs but the silver burdens decreased rapidly at 24-hrs post-exposure in the lung. Furthermore, inhaled MSNPs induced activation of mitogen-activated protein kinase (MAPK) signaling in the lung. In summary, single inhaled MSNPs caused mild pulmonary toxicity, which was associated with activated MAPK signaling. Taken together, our results suggest that the inhalation toxicity of MSNPs should be carefully considered at the molecular level. Source


Diwakar M.,Dehradun Institute of Technology | Patel P.K.,Dehradun Institute of Technology | Gupta K.,HCT
2013 IEEE 2nd International Conference on Image Information Processing, IEEE ICIIP 2013 | Year: 2013

Object tracking is an important task within the field of computer vision. There are two key steps in video analysis: detection of interesting moving objects and tracking of such objects from frame to frame. Mean shift object tracking algorithm is a feature based algorithm. In this paper color information of object are extracted as well as texture information is also extracted by using local binary pattern technique to represent the object. In joint color-texture histogram region of interest is extracted and then edges and corners are extracted from the region of interest. Color histogram is insensitive to nondeformation and partial occlusion but it does not perform well when in case of color aberration. To overcome this drawback Local Binary Pattern method is used. This feature makes this algorithm more efficient in comparison of color histogram algorithm. © 2013 IEEE. Source


Diwakar M.,Dehradun Institute of Technology | Patel P.K.,Indian Institute of Technology Kanpur | Gupta K.,HCT
Proceedings of the 2013 International Conference on Advances in Computing, Communications and Informatics, ICACCI 2013 | Year: 2013

In the area of image processing, several methods of edge detection have been proposed till now like Sobel, Robert, Prewitt, Canny, Marr-Hildreth etc. All these methods are having their own advantages and disadvantages. In this paper a new method has been proposed for edge detection using Cellular Automata. Different rules have been applied for edge detection. The outputs are better in terms of clarity and computation time. Finally, the edge detection has been applied for detecting cancerous cells in brain. Using Cellular Automata rules helps in determining the exact location and size of tumor as edges detected using Cellular Automata are fine, continuous and clear. The results of edge detection are confirmed with graphical examples. © 2013 IEEE. Source


Hasna A.M.,HCT
ICETC 2010 - 2010 2nd International Conference on Education Technology and Computer | Year: 2010

As chemical engineering education moves into the new millennium, characterized by competitive global educational market the role of educators in the twenty first century is changing; primarily there is a need to provide modern didactic methods in curriculum delivery. Similarly instructions in chemical engineering programs need to evolve to reflect the industry realities. With much vigor we have heard of the many reports criticizing higher education nad publicizing the need to update and revitalize engineering curriculums to make it relevant in the 21st century. Criticism included, apathetic students, illiterate graduates, and incompetent teaching staff, this remains a thorny issue in higher education. Hence changing student's mind set from being a student to becoming graduate engineers requires global constructs. This paper contributes to chemical engineering elearning and teaching by investigating the challenges for chemical engineering academic staffs and the e-learning barriers to their development and competencies. This work calls for pedagogic re-engineering in learning and teaching process by providing faculty proficiencies in e-learning, since engineering teaching needs to move away from fragmented teaching styles and move into a systems approach to provide an open ended engineering experience. Finally, we recommend implementation strategy guidelines under three key areas as a possible way to address some of the issues. Chemical engineering academic staffs need to learn from history and not remain teaching last century's engineering curriculums. © 2010 IEEE. Source


News Article
Site: http://www.materialstoday.com/news/

Höganäs is testing a new high-capacity transport (HCT) truck to be used in carrying metal powder from Höganäs to the port of Helsingborg in Sweden. Loading two containers instead of one will lower carbon dioxide emission by up to 35%, the company says. ‘This is an important part of our sustainability efforts. In the future we will be able to halve the number of transports between the cities,’ said Melker Jernberg, CEO of Höganäs AB. The HCT vehicles can carry higher tonnage than ordinary heavy lorries, and the new vehicle has a capacity of 54 tonnes of cargo. Each year Höganäs AB dispatches 200 000 tonnes of metal powder from Höganäs to Helsingborg port for further transportation to Asia and North and South America. The goal with the HCT project is to reduce the number of vehicles from eight to four vehicles per day. This story uses material from Höganäs, with editorial changes made by Materials Today. The views expressed in this article do not necessarily represent those of Elsevier.

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