Passive Optical Signal Tapping Device

Securing Passive Optical Networks Against Signal Injection Attacks

Passive optical access networks are susceptible to intended attacks and unintended failures. This paper discusses intrusion by user-side signalinjection resulting in reduced network accessibility and it proposes possible countermeasures. The central function is that an intruding signal can be switched off when it is present.

Active and Passive Nanowire Waveguides for Optical Signal Processing

Miniature Optical Signal Transmission System for an Active Intravascular Device

Objective: Active devices with wired receive coils enable very fast and robust catheter tracking and also intravascular imaging, but potential RF heating of such active devices has so far prevented their clinical use. Recently, a transformer-based cable was presented that efficiently reduces RF heating for active devices [1]. Similar results were obtained with an approach based on diodes [2]. W...

Device-Free Passive Localization

This report describes a Device-Free Passive Localization System (DfP). The system provides a software solution over nominal WiFi equipment to detect the presence and track intruders in an area of interest. The system is based on measuring the changes in the received RSSI at a fixed receiver form a fixed transmitter. Using RSSI values for multiple transmitters and monitoring points, we show a sy...

Tapping Anywhere : A Position - free Wearable Input Device

" Tapping Anywhere " is a new input device that can control wearables mounted on any position of a human body by tapping actions with foot or hand. A body-mounted sensor detects changes in the body's static charge or static capacity caused by the tapping action. This method can be used not only for controlling wearables with rhythmic commands, but also for monitoring activities in everyday life.