scholarly journals Covert Communication in Termography - Analysis of Possibilities and Examples

2021 ◽  
Vol 25 (3) ◽  
pp. 65-72
Author(s):  
Krzysztof Sawicki ◽  
Grzegorz Bieszczad ◽  
Tomasz Sosnowski ◽  
Mariusz Mścichowski
Keyword(s):  
Information Security ◽  
Thermal Imaging ◽  
Communication Channels ◽  
Infrared Camera ◽  
Integration Time ◽  
Covert Communication ◽  
Hidden Information ◽  
Additional Information ◽  
The Third ◽  
Imaging Camera

The article presents a new concept of using thermography – steganography in thermography. Steganography is a technique of hiding information in a non-obvious way and belongs to the field of science related to information security. This article examines three examples of steganographic channels – covert communication channels that use thermal imaging devices in three different ways. The first proposed method uses the possibility of alternating the scene observed by the infrared camera in a way that additional information is included in the thermogram. The second method, called ThermoSteg, uses modification of one of the parameters of the thermal imaging camera (integration time) to embed the signal containing hidden information. The third method is based on digital thermograms and the methods of replacing dead pixels in them by creating the so-called zombie pixels carrying secretive information. Three methods have been implemented under real conditions and proven to work in practice.

scholarly journals ThermoSteg—Covert Channel for Microbolometer Thermographic Cameras

Sensors ◽  
2021 ◽  
Vol 21 (19) ◽  
pp. 6395
Author(s):  
Krzysztof Sawicki ◽  
Grzegorz Bieszczad ◽  
Tomasz Sosnowski
Keyword(s):  
Information Integration ◽  
Thermal Imaging ◽  
Data Extraction ◽  
Physical Phenomenon ◽  
Integration Time ◽  
Covert Channel ◽  
Thermal Camera ◽  
Wireless Data ◽  
Hidden Information ◽  
Imaging Camera

The article presents a new concept—steganography in thermography. Steganography is a technique of hiding information in a non-obvious way and belongs to sciences related to information security. The proposed method, called ThermoSteg, uses a modification of one of the parameters of the thermal imaging camera—integration time—to embed the signal containing hidden information. Integration time changing makes the microbolometer array heat up while reading the sensors. The covert information can be extracted from the stream of thermograms recorded by another thermal camera that observes the first one. The covert channel created with the ThermoSteg method allows the transmission of covert data using a thermal sensor as a wireless data transmitter. This article describes a physical phenomenon that is exploited by the ThermoSteg method and two proposed methods of covert data extraction, and presents the results of experiments.

scholarly journals EFFECTIVE WAYS TO INCREASE THE SECURITY OF STORING INFORMATION IN A DATABASE

2020 ◽  
Vol 70 (2) ◽  
pp. 199-206
Author(s):  
Zh.T. Aituganova ◽  
◽  
B.A. Talpakova ◽  
B.K. Zhussipbek ◽  
◽  
...  
Keyword(s):  
Information Security ◽  
Technological Development ◽  
Communication Channels ◽  
Technical Device ◽  
Additional Information ◽  
Self Defense ◽  
Wide Range ◽  
High Level ◽  
And Storage

In the era of rapid technological development, the issue of information security is very relevant. The article discusses issues related to information security in computer systems due to the simple and quick copying of information through communication channels. The problem of information security covers a wide range of issues, from the legislature to a specific technical device. Program developers suggest the need for technical means of protection that provide a high level of information security. Experience has shown that software cannot guarantee information security. Therefore, any software must be supplemented by organizational measures that determine the rules for access and storage of information. In practice, software users face additional challenges when using security tools. This article presents a classification of guarantees and methods of self-defense, as well as methods of protection by requesting additional information.

scholarly journals An Application for Infrared Camera in Analyzing of the Solidification Process of Al-Si Alloy

2015 ◽  
Vol 15 (3) ◽  
pp. 81-84
Author(s):  
R. Władysiak ◽  
A. Kozuń
Keyword(s):  
Thermal Imaging ◽  
Crystallization Process ◽  
Infrared Camera ◽  
Solidification Process ◽  
Ambient Air ◽  
Test Results ◽  
Similar Shape ◽  
Imaging Camera ◽  
Kinetics Of ◽  
Thermal Curve

Abstract The paper presents the results of the crystallization process of silumin by the TDA thermographic method and the results of the cast microstructure obtained in the sampler TDA-10, that was cooling down in ambient air. The study was conducted for silumin AlSi11 unmodified. The work demonstrated that the use of thermal imaging camera allows for the measurement and recording the solidification process of silumin. Thermal curve was registered with the infrared camera and derivative curve that was calculated on the base of thermal curve have both a very similar shape to adequate them TDA curves obtained from measurements using a thermocouple. Test results by TDA thermographic method enable quantitative analysis of the kinetics of the cooling and solidification process of neareutectic silumin.

scholarly journals Examining the Possibilities of Analyzing the Solidification Process of Al-Si Alloy with the Infrared Camera

2016 ◽  
Vol 16 (1) ◽  
pp. 89-94 ◽  
Author(s):  
R. Władysiak ◽  
A. Kozuń ◽  
T. Pacyniak
Keyword(s):  
Thermal Imaging ◽  
Crystallization Process ◽  
Infrared Camera ◽  
Solidification Process ◽  
Ambient Air ◽  
Test Results ◽  
Similar Shape ◽  
Imaging Camera ◽  
Kinetics Of ◽  
Thermal Curve

Abstract The paper presents the results of the crystallization process of silumin by the TDA thermographic method and the results of the cast microstructure obtained in the sampler ATD-10, that was cooling down in ambient air. The study was conducted for silumins AlSi8 and AlSi11 unmodified. The work demonstrated that the use of thermal imaging camera allows for the measurement and recording the solidification process of silumin. Thermal curve was registered with the infrared camera and derivative curve that was calculated on the base of thermal curve have both a very similar shape to adequate them TDA curves obtained from measurements using a thermocouple. Test results by TDA thermographic method enable quantitative analysis of the kinetics of the cooling and solidification process of hypo-and neareutectic silumins.

Ocular surface temperature differences in glaucoma

2021 ◽  
pp. 112067212110237
Author(s):  
Ari Leshno ◽  
Ori Stern ◽  
Yaniv Barkana ◽  
Noa Kapelushnik ◽  
Reut Singer ◽  
...  
Keyword(s):  
Surface Temperature ◽  
Thermal Imaging ◽  
Ocular Surface ◽  
Open Angle Glaucoma ◽  
Tissue Temperature ◽  
Body Temperatures ◽  
Current Thinking ◽  
Imaging Camera ◽  
The Mean ◽  
The Difference

Purpose: Accumulating evidence suggests that neuroinflammation and immune response are part of the sequence of pathological events leading to optic nerve damage in glaucoma. Changes in tissue temperature due to inflammation can be measured by thermographic imaging. We investigated the ocular surface temperature (OST) profile of glaucomatous eyes to better understand the pathophysiology of these conditions. Methods: Subjects diagnosed with glaucoma (primary open angle glaucoma [POAG] or pseudo exfoliation glaucoma [PXFG]) treated at the Sam Rothberg Glaucoma Center (11/2019–11/2020.) were recruited. Healthy subjects with no ocular disease served as controls. The Therm-App thermal imaging camera was used for OST acquisition. Room and body temperatures were recorded, and the mean temperatures of the medial cantus, lateral cantus, and cornea were calculated with image processing software. Results: Thermographic images were obtained from 52 subjects (52 eyes: 25 POAG and 27 PXFG) and 66 controls (66 eyes). Eyes with glaucoma had a significantly higher OST compared to controls (mean 0.9 ± 0.3°C, p < 0.005). The difference between the two groups remained significant after adjustment for age, sex, intraocular pressure (IOP) and room and body temperatures. Lens status and topical IOP-lowering medication did not significantly affect OST. A subgroup analysis revealed that the OST was higher among eyes with POAG compared to eyes with PXFG, but not significantly. Conclusions: Differences in the OST between glaucomatous and normal eyes strengthens current thinking that inflammation affects the pathophysiology of glaucoma. Longitudinal studies are warranted to establish the prognostic value of thermographic evaluations in these patients.

scholarly journals Thermal Imaging Study to Determine the Operational Condition of a Conveyor Belt Drive System Structure

Energies ◽  
2021 ◽  
Vol 14 (11) ◽  
pp. 3258
Author(s):  
Dawid Szurgacz ◽  
Sergey Zhironkin ◽  
Stefan Vöth ◽  
Jiří Pokorný ◽  
A.J.S. (Sam) Spearing ◽  
...  
Keyword(s):  
Thermal Imaging ◽  
Thermal Condition ◽  
Thermal State ◽  
Operating Time ◽  
Imaging Study ◽  
Conveyor Belt ◽  
System Structure ◽  
Thermal Imaging Camera ◽  
Imaging Camera ◽  
Maintenance Service

The paper discusses the results of a study carried out to determine the thermal condition of a conveyor power unit using a thermal imaging camera. The tests covered conveyors in the main haulage system carrying coal from a longwall. The measurements were taken with a thermal imaging diagnostic method which measures infrared radiation emitted by an object. This technology provides a means of assessing the imminence and severity of a possible failure or damage. The method is a non-contact measuring technique and offers great advantages in an underground mine. The thermograms were analysed by comparing the temperature distribution. An analysis of the operating time of the conveyors was also carried out and the causes of the thermal condition were determined. The main purpose of the research was to detect changes in thermal state during the operation of a belt conveyor that could indicate failure and permit early maintenance and eliminate the chance of a fire. The article also discusses the construction and principle of operation of a thermal imaging camera. The findings obtained from the research analysis on determining the thermal condition of the conveyor drive unit are a valuable source of information for the mine’s maintenance service.

Results of Archaeoparasitological and Palynological Analyzes of the Contents of the Sewage Drain of the Chorgun Tower (South-Western Crimea)

2021 ◽  
pp. 377-389
Author(s):  
Evgeniy Nedelkin ◽  
◽  
Alexander Khrustalev ◽  
Anna Babenko ◽  
Sergey Slepchenko ◽  
...  
Keyword(s):  
Intestinal Parasites ◽  
Gastrointestinal Diseases ◽  
Archaeological Research ◽  
Additional Information ◽  
The Third ◽  
15Th Century ◽  
Palynological Study ◽  
Sanitary Conditions ◽  
The Village ◽  
Constant Source

The article presents the results of an archaeoparasitological and palynological study of a sample taken from the sewage drain of the Chorgun Tower. This is a fortification on the territory of the village of Chernorechie (South-Western Crimea). According to archaeological research, the construction of the keep dates back to the third quarter of the 15th century. Four types of eggs of intestinal parasites infecting humans and synanthropic animals were identified in the sample. Regarding parasitic and infectious gastrointestinal diseases, human whipworm and roundworm eggs found in the sample are indicative of relatively unfavorable sanitary conditions of the fortification. Based on the features of the archaeoparasitological spectrum, it can be concluded that anthelminthic agents were used or food with antiparasitic effects against roundworms was consumed. The difficult sanitary and epidemiological situation was also complicated by synanthropic rodents, such as rats and domestic mice, which could be a constant source of dangerous infections in the Chorgun Keep. A palynological study of the contents of the sewage runoff made it possible to obtain additional information on the nutrition of people who used the latrine facilities in the Chorgun Keep. What is equally important is that the study demonstrates the possibilities of methods for the study of canalization as a source of bioarchaeological information.

Rewetting Analysis of Hot Moving Surface by Round Water Jet Impingement

2018 ◽  
Author(s):  
Avadhesh Kumar Sharma ◽  
Mayank Modak ◽  
Santosh K. Sahu
Keyword(s):  
Experimental Investigation ◽  
Reynolds Number ◽  
Thermal Imaging ◽  
Transient Temperature ◽  
Axial Distance ◽  
Initial Surface ◽  
Moving Plate ◽  
Thermal Imaging Camera ◽  
Plate Velocity ◽  
Imaging Camera

Impinging jets are commonly utilized in the run-out table (ROT) cooling in the hot rolling process in steel manufacturing industries. The phenomenon of rapid cooling of a sufficiently hot surface is termed as the quenching. The present paper reports the rewetting behavior of 0.15 mm thick hot moving stainless steel foil (SS-304) by circular impinging jet from bottom side through experimental investigation. The transient temperature of the hot foil is recorded by using thermal imaging camera (A655sc, FLIR system). Tests are performed for a varied range of Reynolds number (Re = 2500–10000), nozzle to plate distance (z/d = 6), moving plate velocity (0–40 mm/s) and initial surface temperature 500±10 °C. Transient temperature obtained from thermal imaging camera is used to evaluate rewetting time and rewetting velocity. Based on the experimental investigation correlation has been proposed to predict non-dimensional rewetting velocity as a function of various parameters, namely, Reynolds number, non-dimensional axial distance and moving plate velocity.

Policy analysis in think tanks

2017 ◽  
Author(s):  
Mauricio I. Dussauge-Laguna ◽  
Marcela I. Vazquez
Keyword(s):  
Policy Analysis ◽  
Communication Channels ◽  
Relevant Information ◽  
Think Tanks ◽  
The Third ◽  
The Future ◽  
Future Challenges ◽  
The Impact

The chapter provides an overview of how policy analysis takes place in Mexican Think Tanks. It focuses on two of the few organisations of this kind that currently exist in the country: the Centro de Investigación para el Desarrollo (CIDAC, or Centre for Research for Development) and the Centro de Estudios Espinosa Yglesias (CEEY, or Centre of Studies Espinosa Yglesias). The chapter is divided into four sections. The first discusses the main features of think tanks, with a particular focus on the Mexican ones. The second presents the origins and general objectives of CIDAC and CEEY, and describes how these two organizations conduct policy analysis. The third compares both cases, paying particular attention to how they define their topics of interest, how they gather relevant information, what kind of policy products they generate, what kind of communication channels they use, and how they assess the impact that their analyses may have had. The chapter closes with some conclusions and general remarks about the future challenges of policy analysis in Mexican think tanks.

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