Monitoring Power Module Solder Degradation From Heat Dissipation in Two Opposite Directions

Co-existing heat currents in opposite directions in graphene nanoribbons

Study on the Thermal Resistance of Multi-chip Module High Power LED Packaging Heat Dissipation System

Thermal resistance is a key technical index which indicates the thermal management of multi-chip module high power LED (MCM-LED) packaging heat dissipation system. In this paper, the prototype structure of MCM-LED packaging heat dissipation system is proposed to study the reliable thermal resistance calculation method. In order to analyze the total thermal resistance of the MCM-LED packaging he...

Are Usability and Security Two Opposite Directions in Computer Systems?

Instinct tells us that computer security and computer usability are inversely proportional to each other. In other words, the tougher and stricter the security is, the less usability there is, and vice versa. However, there have been plenty of cases where both computer security and computer usability went hand in hand with each other and actually improved together. In the last few years securit...

Monitoring power dissipation for fault detection

In this paper, we suggest that the dynamic power dissipation of a circuit can be used to detect faults in it. The change in dissipation caused by a fault can be maximized by applying speciic test vectors. For example circuits, we show that the power dissipation can be used to detect faults which do not aaect static power dissipation. We also discuss how faults may be detected with a frequency d...

Opposite momenta lead to opposite directions

When a particle decays into two fragments, the wavefunctions of the latter are spherical shells with expanding radii. In spite of this spherical symmetry, the two particles can be detected only in opposite directions. When particles at rest decay into two fragments, the latter have opposite momenta, p1 + p2 = 0. (1) Yet, the statistical distribution of each fragment is isotropic. The same holds...