Die stress characterization using arrays of CMOS sensors

1998 ◽  
Author(s):  
A.T. Bradley ◽  
R.C. Jaeger ◽  
J.C. Suhling ◽  
Y. Zou
Keyword(s):  
Cmos Sensors ◽  
Die Stress

Aktueller Stellenwert der Kardio-MRT in Diagnostik und Therapie

2021 ◽  
Vol 146 (07) ◽  
pp. 461-465
Author(s):  
Julia M. Vietheer ◽  
Christian W. Hamm ◽  
Andreas Rolf
Keyword(s):  
Late Gadolinium Enhancement ◽  
T2 Mapping ◽  
Strain Imaging ◽  
Gadolinium Enhancement ◽  
Quantitative Parameter ◽  
Diagnostik Und Therapie ◽  
Die Stress

Quantifizierung der links- und rechtsventrikulären Funktion Strain Imaging erweitert die klassische Volumetrie der MRT um einen sehr subtilen globalen und regionalen Funktionsparameter. Strain detektiert sehr frühe Funktionseinbußen beider Ventrikel, die visuell noch nicht erkennbar sind. Insbesondere der longitudinale Strain ist bei ischämischen und nichtischämischen Erkrankungen frühzeitig reduziert. Strain hat über die EF hinaus zusätzliche prognostische Bedeutung. Gewebecharakterisierung T1- und T2-Mapping erweitern die klassische Gewebecharakterisierung mit Late Gadolinium Enhancement (LGE) um sehr subtile quantitative Parameter, die diffuse Fibrose (T1) und Ödem (T1 und T2) widerspiegeln. Ischämiediagnostik Die Perfusions-MRT unter Vasodilatatorstress ist das genaueste Verfahren zur Ischämiediagnostik. Die MR-INFORM-Studie zeigt, dass mithilfe der Stress-MRT fast die Hälfte der Katheteruntersuchungen in einem Kollektiv mit hoher Prätestwahrscheinlichkeit vermieden werden kann. Dabei ist die Stress-MRT der FFR-basierten Strategie nicht unterlegen und genauso sicher.

VIS-NIR hyperspectral cameras

Photoniques ◽  
2021 ◽  
pp. 58-64
Author(s):  
Stéphane Tisserand
Keyword(s):  
Multispectral Imaging ◽  
Three Dimensional ◽  
Spectral Domain ◽  
Spectral Bands ◽  
Cmos Sensors

Hyperspectral and multispectral imaging can record a single scene across a range of spectral bands. The resulting three-dimensional dataset is called a "hypercube". A spectrum is available for each point of the image. This makes it possible to analyse, quantify or differentiate the elements and materials constituting the scene. This article presents the existing technologies on the market and their main characteristics in the VIS/NIR spectral domain (400-1000 nm). It then focuses on a specific multispectral technology called snapshot multispectral imaging, combining CMOS sensors and pixelated multispectral filters (filtering at the pixel level).

scholarly journals Generalized optimizations of two-stage forging of micro/meso copper fastener

2018 ◽  
Vol 185 ◽  
pp. 00002
Author(s):  
Shih-Hsien Lin ◽  
Un-Chin Chai ◽  
Gow-Yi Tzou ◽  
Dyi-Cheng Chen
Keyword(s):  
Simulation Analysis ◽  
Effective Strain ◽  
Cold Forging ◽  
Two Stage ◽  
Forming Simulation ◽  
Multi Stage ◽  
Element Simulation ◽  
Die Stress ◽  
Stress Optimization ◽  
Forging Force

Three are generalized simulation optimizations considering the forging force, the die stress, and the dual-goals in two-stage forging of micro/meso copper fastener. Constant shear friction between the dies and workpiece is assumed to perform multi-stage cold forging forming simulation analysis, and the Taguchi method with the finite element simulation has been used for mold-and-dies parameters design simulation optimizations considering the forging force, die stress, and dual-goals. The die stress optimization is used to explore the effects on effective stress, effective strain, velocity field, die stress, forging force, and shape of product. The influence rank to forging process of micro/meso copper fastener for three optimizations can be determined, and the optimal parameters assembly consider die stress can be obtained in this study. It is noted that the punch design innovation can reduce the forging force and die stress.

scholarly journals CHARACTERIZATION OF MODERN CCD AND CMOS SENSORS FOR SKY SURVEYS

2021 ◽  
Vol 53 ◽  
pp. 190-197
Author(s):  
S. Karpov ◽  
A. Christov ◽  
A. Bajat ◽  
R. Cunniffe ◽  
M. Prouza
Keyword(s):  
Laboratory Testing ◽  
Frame Rate ◽  
Wide Field ◽  
Large Format ◽  
Ccd Cameras ◽  
Sky Survey ◽  
Monitoring Applications ◽  
Cmos Sensors ◽  
Robotic Telescopes

Here we review the efforts we take in a newly established laboratory inside Institute of Physics in Prague in order to characterize modern large-format CCD and CMOS sensors for sky survey applications. While the laboratory is primarily established in order to participate in low-level CCD sensor characterization for LSST project, we also managed to perform a thorough laboratory testing of recently released Andor Marana sCMOS (which is especially interesting for wide-field sky monitoring applications due to its large format, backilluminated design, high achievable frame rate and low read-out noise), as well as detailed measurements of response non-linearity of Moravian Instruments G4-16000 CCD cameras (based on large-format Kodak KAF-16803 chip) used in several robotic telescopes. We briefly review the results acquired on these cameras, as well as hardware and software we developed for the laboratory.

Sign in / Sign up

Export Citation Format

Share Document