The Design and Development of New Thermally Stable Infra-Red Active Photochromic Compounds

Author(s):  
Harry G. Heller ◽  
Kevin Koh ◽  
Mamut Kose ◽  
Neil Rowles
2013 ◽  
Vol 594-595 ◽  
pp. 919-923
Author(s):  
Ahamad Zaidi Ahmad Firdaus ◽  
Ng Shao Liang ◽  
Mohd Bin Sulaiman Hafis ◽  
Mohd Jamir Mohd Ridzuan ◽  
Nur Hidayah Ahmad Zaidi

This paper presents the design and development of tracking system for the mines detector robot. The scope for the tracking system covers two important tasks: 1. Design of optimum tracking path to cover maximum scanning area of an enclosed field, and 2. Obstacles avoidance system to be able avoid the various types of obstacles during the scanning process. The tracking algorithms were designed and simulated using Webots simulation software. Upon successful simulation where all design objectives have been achieved, the algorithms were programmed in microcontroller to implement the tracking system on the mines detector robot. Experimental test rig for the robot was a flat surface, enclosed 3m x 3m area where several obstacles of different sizes and shapes were randomly placed. Several metal samples representing the metal detonator of minefield were also placed to test the sensing system of the robot. Infra-red (IR) sensors were used for the system to detect the obstacles and also to detect the end-path boundary of a routine scanning cycle. While simulation test results have shown achieved design objectives, experimental results shown 90% achievement and limitation on evading big size of circle-type obstacle.


Author(s):  
C. Wolpers ◽  
R. Blaschke

Scanning microscopy was used to study the surface of human gallstones and the surface of fractures. The specimens were obtained by operation, washed with water, dried at room temperature and shadowcasted with carbon and aluminum. Most of the specimens belong to patients from a series of X-ray follow-up study, examined during the last twenty years. So it was possible to evaluate approximately the age of these gallstones and to get information on the intensity of growing and solving.Cholesterol, a group of bile pigment substances and different salts of calcium, are the main components of human gallstones. By X-ray diffraction technique, infra-red spectroscopy and by chemical analysis it was demonstrated that all three components can be found in any gallstone. In the presence of water cholesterol crystallizes in pane-like plates of the triclinic crystal system.


Author(s):  
Pallavi Dharwada ◽  
Joel S. Greenstein ◽  
Anand K. Gramopadhye ◽  
Steve J. Davis

1962 ◽  
Vol 18 (4) ◽  
pp. 1487-1497 ◽  
Author(s):  
I BUTCHER ◽  
W GERRARD ◽  
E MOONEY ◽  
R ROTHENBURY ◽  
H WILLIS
Keyword(s):  

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