Fingerprint Spoof Detection By NIR Optical Analysis

Optical analysis of ink and other contaminants in process waters

TAPPI Journal ◽

10.32964/tj11.8.51 ◽

2012 ◽

Vol 11 (8) ◽

pp. 51-58

Author(s):

ANTTI HAAPALA ◽

MIKA KÖRKKÖ ◽

ELISA KOIVURANTA ◽

JOUKO NIINIMÄKI

Keyword(s):

Optically Active ◽

Process Water ◽

Paper Machine ◽

Optical Analysis ◽

Direct Process ◽

Active Components ◽

Water Contaminants ◽

Dependent Measurement ◽

Measurement Methodology

Analysis methods developed specifically to determine the presence of ink and other optically active components in paper machine white waters or other process effluents are not available. It is generally more interest¬ing to quantify the effect of circulation water contaminants on end products. This study compares optical techniques to quantify the dirt in process water by two methods for test media preparation and measurement: direct process water filtration on a membrane foil and low-grammage sheet formation. The results show that ink content values obtained from various analyses cannot be directly compared because of fundamental issues involving test media preparation and the varied methodologies used to formulate the results, which may be based on different sets of assumptions. The use of brightness, luminosity, and reflectance and the role of scattering measurements as a part of ink content analysis are discussed, along with fine materials retention and measurement media selection. The study concludes with practical tips for case-dependent measurement methodology selection.

Download Full-text

In Vivo Optical Analysis of Quantitative Changes in Collagen and Elastin During Arterial Remodeling¶

Photochemistry and Photobiology ◽

10.1562/2004-03-10-ra-107.1 ◽

2005 ◽

Vol 81 (2) ◽

pp. 457 ◽

Cited By ~ 19

Author(s):

Alexander Christov ◽

Renee M. Korol ◽

Erbin Dai ◽

Liying Liu ◽

Haiyan Guan ◽

...

Keyword(s):

Arterial Remodeling ◽

Optical Analysis ◽

Quantitative Changes

Download Full-text

Aero-optical analysis of compressible flow over an open cavity

10.2514/6.1987-1399 ◽

1987 ◽

Author(s):

PHILIP CASSADY ◽

STANLEY BIRCH ◽

P. TERRY

Keyword(s):

Compressible Flow ◽

Open Cavity ◽

Optical Analysis

Download Full-text

VLSI for Space Applications—Single Event Effect Investigation and Optical Analysis on an Integrated Laser Platform

ISTFA 2017: Conference Proceedings from the 43rd International Symposium for Testing and Failure Analysis ◽

10.31399/asm.cp.istfa2017p0621 ◽

2017 ◽

Author(s):

Samuel Chef ◽

Chung Tah Chua ◽

Yu Wen Siah ◽

Philippe Perdu ◽

Chee Lip Gan ◽

...

Keyword(s):

Pulsed Laser ◽

Single Event ◽

Optical Analysis ◽

Space Applications ◽

Laser Probing ◽

Single Event Effect ◽

Evaluation Time ◽

Black Boxes ◽

System Use ◽

First Time

Abstract Today’s VLSI devices are neither designed nor manufactured for space applications in which single event effects (SEE) issues are common. In addition, very little information about the internal schematic and usually nothing about the layout or netlist is available. Thus, they are practically black boxes for satellite manufacturers. On the other hand, such devices are crucial in driving the performance of spacecraft, especially smaller satellites. The only way to efficiently manage SEE in VLSI devices is to localize sensitive areas of the die, analyze the regions of interest, study potential mitigation techniques, and evaluate their efficiency. For the first time, all these activities can be performed using the same tool with a single test setup that enables a very efficient iterative process that reduce the evaluation time from months to days. In this paper, we will present the integration of a pulsed laser for SEE study into a laser probing, laser stimulation, and emission microscope system. Use of this system will be demonstrated on a commercial 8 bit microcontroller.

Download Full-text