Contemporary steganography approaches suffer from many serious deficiencies; generally, they attempt to hide data as detectable and suspicious noise in a cover that is assumed to look innocent. In addition, steganography approaches found in literature have focused on how to conceal a message and not on how to camouflage its transmittal. This paper presents a comprehensive survey that focuses mainly on, but not limited to, computational linguistics aspects of steganography and it is organised as follows: Section 1 concisely details the fundamental concepts related to steganography, summarises the current state of the research, and highlights the technical concerns. Then, it briefly describes the modern steganography, namely noiseless steganography (Nostega). Section 2 discusses the contemporary steganography and Nostega paradigm (the modern steganography). Section 3 demonstrates Nostega-based methodologies. Section 4 presents a brief overview of steganalysis. Section 5 concludes the survey and highlights directions for future research.
Noise measurement in the fast lane! - case study
Due to the nature of the Vehicle and Operator Services Agency (VOSA) work, noise is an inevitable by-product of its daily activities. Consequently to ensure the welfare of both its staff and the community in which it operates, VOSA undertakes regular noise assessments to ensure that the relevant regulations are being adhered to, thereby protecting both the environment in which it operates as well as all staff involved in the operations. VOSA provides a range of licensing, testing and enforcement services, with...
Noise induced hearing loss: how can you start monitoring your workforce?
An estimated 20,000 people working during the last year suffered from noise induced hearing loss (NIHL), new as well as longstanding cases, caused or made worse by work.The cause of NIHL is preventable but the affects are permanent, resulting in life changing injuries that can seriously impair a workers’ quality of life. Industries with the highest incidences of NIHL include manufacturing, construction, energy and extraction. Prolonged exposure to dangerous levels of noise in the workplace is concerning...
Is a background noise survey worth doing? - Case Study
As a plant owner or designer you will logically try to keep construction costs down wherever possible. So noise control features can easily be sidelined as an “optional extra” to be added later if the need arises. You might also be confident a new industrial plant will comply with all regulations on completion, but that doesn’t mean a future neighbour won’t complain about noise – whether real or perceived! Undertaking a pre-construction background noise survey can therefor offer...
Industrial hygiene assessment of a large chemical manufacturing facility – Case Study
Challenge: Antea®Group was contracted by a large international chemical manufacturing organization to provide a plant-wide industrial hygiene assessment of chemical and noise exposures within their facility. The overall objective of the project was to evaluate worker exposures, compare results as to compliance with applicable regulations and guidelines, and to provide recommendations for appropriate corrective actions. Solution: Antea Group completed a plant wide industrial hygiene assessment of a 24-hour...
British American Tobacco Survey – Case Study
Project Highlights Envirochem carried out environmental perimeter monitoring during the demolition of warehouses at the British American Tobacco site in Southampton. Airborne Dust, noise and vibration levels were all monitored using state of the art equipment. Project Description Three monitoring stations were identified in conjunction with the client and the Environmental Health officer (EHO). Dust, noise and vibration limits set by the EHO were programmed into the instruments, allowing text alerts to be sent...