China
Africa
Explore chapters and articles related to this topic
Physical and Waterside Security in the Port Facility
Published in Kenneth Christopher, Port Security Management, 2014
Perimeter security refers to detecting, assessing, and tracking intruders and/or threats related to the facility perimeter, the area contiguous to and surrounding the target environment. Physical security devices along the perimeter can include one or more of a combination of intrusion detectors, alarms, barriers, lighting, structural materials, procedural controls, and human resources. Individual components of port perimeter physical security depend on the environment and general location of the port facility.
Physical Security of Substations
Published in John D. McDonald, Electric Power Substations Engineering, 2017
John Oglevie, W. Bruce Dietzman, Cale Smith
Access to energized equipment and bus work may be of concern if the perimeter security measures are breached. Polycarbonate or other barriers on ladders and structure legs can be used to provide additional barriers. Refer to the NESC and Occupational Safety and Health Administration (OSHA) requirements. These barriers may also function as animal deterrents.
Highly sensitive optical length measurement by using a microwave photonic filter with multi-passband
Published in Journal of Modern Optics, 2019
Jianghai Wo, Jin Zhang, Tao Wang, Pengfei Du, Anle Wang, Sishi Li, Xiang Li, Haida Yang, Yalan Wang
An optical fibre sensor with high sensitivity is very critical when measuring either physical or chemical properties of the environment and can find numerous applications in the field of structural health monitoring, perimeter security, medical care and electrical power engineering. When compared with traditional electrical or mechanical sensing techniques, the most significant advantages of fibre-based devices are compact size, light weight, inertness in chemical and biological applications, applicability in harsh environments and immunity to electromagnetic interference (1). The most common fibre-optic sensors now are FBG sensors (2) and interferometric sensors (3), which are demodulated involving converting the measurand into the shift in the optical wavelength domain. The measuring sensitivity and response speed are limited since an optical interrogator for example optical spectrum analyser (OSA) is usually necessary. Moreover, ordinary fibre sensors suffer from the cross-sensitivity of other parameters (4), and it is difficult for multi-parameter measurement.