T. S. Titova, O. D. Pokrovskaya Interdisciplinary proposition of the theory of terminalistics [more] [back]
Objective: To characterize an interdisciplinary proposition and scientifi c novelty of the introduced theory of terminalistics. Methods: Analytical method was applied in the study. Results: Theoretical topicality of the theory of terminalistics was justifi ed by means of analyzing problematic areas, studied by the allied scientifi c disciplines. Academic novelty and aspects of practical application of the theory were pointed out. Characteristic features of the new theory were demonstrated. Development periodization and the structure of the theory of terminalistics were suggested, the analysis of scientifi c doctrines, generating the methodologies of terminalistics, was conducted. Practical importance: A new multi scientifi c transport and logistical approach will make it possible to integrate the issues of hauling and terminal storage handling of freight, regarding them not only as local transport, storage and logistical systems, but as storage-retrieval systems. For OAO “Russian Railways” incorporating the accumulated knowledge of the objects of storage-retrieval infrastructure in terminalistics will make it possible to implement the key directions of “The development strategy of railway transport of the Russian Federation for the period through to 2030” and achieve the 3–4 PL-level of a logistic provider. Keywords: Terminalistics, storage-retrieval systems, logistical objects
M. V. Gofman, A. A. Kornyenko, Y. T. Mironchikov Digital marking of audio signals procedure for hidden acoustic communication via aerial audio channel [more] [back]
Objective: To develop the procedure of digital marking of audio signals, aimed at data transmission via an aerial audio channel. Methods: The methods applied in the study refer to the theory of communication and steganography. Results: The introduced digital marker uses all audible frequency coverage. The digital marker codes one data bit. The decision on the value of the transferred bit is rendered on the basis of the central value sign of the cross-correlation function. Two methods were introduced for digital marker construction. They are purposely oriented at frequency properties of usual audio signals. Low computation complexity of the given marking procedure makes it possible to use it for wireless data communication between usual smartphones. The procedures provide the opportunity to perform digital marking both for speech and music audio signals without the emergence of any distinctly audible artifacts. Data is embedded in the form of a marker in audio signal frequency domain by means of amplitude modulation of its frequency components. Practical importance: The presented model of hidden data transmission can be applied in inaudible for the human ear data transmission via an aerial audio channel. Keywords: Digital marker, audio signal, hidden data transmission, aerial audio channel, acoustic communication, stegoaudio signal.
D. V. Efanov, A. M. Kostrominov, A. D. Manakov, A. V. Makshanov, V. A. Sharov Modified modulus weight-based sum codes in experiment on organization of concurrent error detection systems of combinational benchmarks [more] [back]
Objective: To study the specifi cities of the effect of unit selection when building modulus weight-based sum codes on structural redundancy of concurrent error detection systems of logical circuits of automatics. Methods: The methods of the theory of informatics and coding, the theory of discrete devices and engineering diagnostics of discrete systems were applied. Results: Characteristics of structural redundancy of concurrent error detection systems were analyzed, built on the basis of modifi ed modulus codes with summation of weight-based data bits with weight coeffi cients, generating the sequence of natural numbers. In the experiment with a set of combinational benchmarks MCNC Benchmarks it was shown that the use of presented codes makes it possible to organize concurrent error detection systems, possessing lower structural redundancy than a classical duplication system. Practical importance: The obtained results alongside with data of the known studies in this sphere make it possible to consider the prospects of modifi ed modulus weight-based sum codes application when solving the tasks of building testable discrete systems.. Keywords: Engineering diagnostics, concurrent error detection system, Berger code, modified modulus weight-based sum code, structural redundancy.