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Hydrophobization of cotton fabric by Gliding Arc plasma discharge
Pavel Cerny,Petr Bartos,Pavel Olsan,Petr Spatenka 한국물리학회 2019 Current Applied Physics Vol.19 No.2
The surface modification in order to obtain hydrophobic cotton fabrics was carried out using air/HMDSO Gliding Arc plasma discharge. The dependence of the surface wettability on used process parameters, such as air flow, sample distance and treatment time were investigated. The wettability of cotton fabrics was evaluated by the drop test method by measuring the time of droplet absorption and water contact angle (WCA). The changes in the surface morphology were examined by optical microscopy and scanning electron microscopy (SEM). The treated hydrophobic fabrics were subjected to the analysis of chemical composition of the applied coatings using the ATR-FTIR spectroscopy. Hydrophobic cotton fabrics were obtained, especially with a high resistance to static wetting. In addition, the treated cotton fabrics were tested using a spray test measurement and were subjected to multiple washing.
음원 파라미터 모델과 인공신경망을 이용한 음성장애 검출
파벨 시틸(Pavel Chytil),조철우(Cheolwoo Jo),미샤 파벨(Misha Pavel) 한국음성학회 2008 음성과학 Vol.15 No.2
There is a number of clinical conditions that affect directly or indirectly the physical properties of the vocal folds and thereby the pressure waveforms of elicited sounds. If the relationships between the clinical conditions and the voice quality are sufficiently reliable, it should be possible to detect these diseases or disorders. The focus of this paper is to determine the set of features and their values that would characterize the speaker’s state of vocal folds. To the extent that these features can capture the anatomical, physiological, and neurological aspects of the speaker they can be potentially used to mediate an unobtrusive approach to diagnosis. We will show a new approach to this problem supported with results obtained from two disordered voice corpora.
Russia as a Security Disaster Area: Possible Conflicts and Interventions in 2015
( Pavel K Baev ) 한국국방연구원 2002 The Korean Journal of Defense Analysis Vol.14 No.1
The fluid state of the system of international relations in the middle of the global war against terrorism increases the need to undertake risk analysis of the options that until recently could have been dismissed as improbable. This article takes a deliberately pessimistic view on Russia, which continues to be a source of major security challenges, and attempts to measure the scale of possible disasters in medium-long perspective. This country, despite its present-day semblance of stability, may see a chain of violent conflicts engulfing the most vulnerable parts of its vast periphery - and some of those may pose such risks to international peace and security that external interventions might become necessary. The analysis examines the elements of the basic scenario of gradual erosion of the central authority in Russia under the impact of centrifugal forces and identifies a number of possible flash-points in the North, South, West and Far East of the country. The requirements for, and formats of external armed interventions in these low-intensity but high-risk conflicts are evaluated, while the fundamental issue of whether the West would be politically willing and militarily capable of performing any of the described interventions is deliberately left out.
Pavel V. Yemelin,Sergey S. Kudryavtsev,Natalya K. Yemelina 대한환경공학회 2021 Environmental Engineering Research Vol.26 No.4
The purpose of the article is to present a methodological approach to assessing the state of the risk to the environment from man-made emergencies at chemically hazardous sites. The methodological approach is based on an expert method, the use of which allowed the authors to create the structure of the risk management system and, determine the plurality of criteria parameters while taking into account their weight in the formation of the environmental consequences of chemical accidents. Criteria parameters were grouped into clusters of physicochemical and toxicological properties of hazardous chemicals used at a chemical plant, equipment operating at an enterprise, personnel, and environmental vulnerability. The research became the basis of the Guidelines for Assessing the Environmental Risk from Emergencies at Chemically Hazardous Sites. As an example, the article presents the calculation of the level of environmental risk for a terrestrial site from the metallurgical enterprise LLP Kazakhmys Smelting, in Zhezkazgan town, Republic of Kazakhstan. The developed methodology is the basis of the Information and Analytical System for Assessing the Environmental Consequences of Man-made Emergencies, which allows users to facilitate the implementation of a set of measures aimed to forecast and reduce the impact of emergency’s damaging factors on the environment.