公开(公告)号：US20190007134A1

公开(公告)日：2019-01-03

申请号：US15964790

申请日：2018-04-27

Applicant: NEC Laboratories America, Inc.

Inventor： Ivan DJORDJEVIC ,  Shaoliang ZHANG ,  Ting WANG

IPC: H04B10/11 ,  H04B10/516 ,  H04L29/06 ,  G02B6/028

Abstract: Aspects of the present disclosure describe physical layer security in optical communications wherein Bessel modes are employed and significantly outperform conventional schemes with respect to secrecy and advantageously benefit from atmospheric turbulence effects with beam splitting attacks.

公开(公告)号：US20170209725A1

公开(公告)日：2017-07-27

申请号：US15412406

申请日：2017-01-23

Applicant: NEC Laboratories America, Inc.

Inventor： Junqiang HU ,  Ting WANG

IPC: A62C37/50 ,  A62C13/76

CPC classification number: A62C37/50 ,  A62C13/76 ,  H04Q9/00 ,  H04Q2209/82 ,  H04Q2209/883

Abstract: Aspects of the present disclosure describe apparatus, methods and systems for monitoring the operational status of fire extinguishers through the utilization of optically sensed, color profile determinations of a pressure gauge positioned on the fire extinguisher as well as the utilization of vibrational, and location sensing devices. Advantageously, monitoring apparatus according to the present disclosure are networkable, and a number of their operational characteristics may be configured via the network and associated servers. Furthermore, monitoring apparatus according to the present disclosure may employ vibrational, acceleration, GPS, RFID, and ultrasonic sensors to detect movement, location, and obstructions. In sharp contrast to the prior art, apparatus, methods and systems according to the present disclosure operate with existing fire extinguishers and provide a convenient, cost effective, and highly functional upgrade path for deployed fire extinguishers.