36 research outputs found

    Mail client with data transfer protected with end-to-end encryption

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    This article is devoted to the study of the issues of secure messaging and file exchange by e-mail at the enterprises of the agro-industrial complex. The purpose of this work is to develop an algorithmic support and software of mail client that supports the functionality of end-to-end data encryption. The following research methods are used in the article: comparison method, observation method, structural analysis method. The comparison method is used to identify differences between key distribution protocols. Methods of observation and analysis make it possible to understand the behavior of various protocols within systems that differ in technical and software properties. The article consists of four parts: Introduction, Materials and Methods, Results, Conclusions. The first part describes the relevance of the topic, discusses the features of various cryptographic protocols. The second part describes the developed algorithms that ensure the operation of the mail client and end-to-end data encryption. The third part discusses the results of software implementation of the developed algorithms. In the fourth part conclusions are made and summed up. The main results of the work are algorithmic implementation of software for local architecture based on the use of symmetric cryptography; a software tool designed according to a local scheme, including modules that allow you to develop a system on a client-server architecture

    The energy balance of the asymmetric combined inductive-capacitive RF discharge at low pressure

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    The combined inductive-capacitive RF discharge at low gas pressure is considered for a case of collisionless ion motion. The power distribution model in the combined RF discharge in case of two asymmetric RF electrodes is developed in term of a ratio of the electrode areas and in term of a magnitude of applied RF voltage. We believe that power distributes on three parts: ionization and acceleration of ions in two electrode-sheath transitions. Two types of design is considered: with one and two RF generators. The dependencies of the dissipated RF power parts are obtained in terms of external discharge parameters. It is revealed an existence of a power maximum on acceleration of ions at electrode, which has a lower area. Been accorded expression for dependence of optimum discharge parameters. At using the power distribution model results the system parameter correlation’s have been obtained for a maximum process effectiveness of physical sputtering for systems on the basis of combined inductive-capacitive discharge.Π£ Ρ€ΠΎΠ±ΠΎΡ‚Ρ– Ρ€ΠΎΠ·Π³Π»ΡΠ΄Π°Ρ”Ρ‚ΡŒΡΡ ΠΊΠΎΠΌΠ±Ρ–Π½ΠΎΠ²Π°Π½ΠΈΠΉ Ρ–Π½Π΄ΡƒΠΊΡ†Ρ–ΠΉΠ½ΠΎ-ємнісної Π’Π§ розряд Π² області низького тиску Ρ€ΠΎΠ±ΠΎΡ‡ΠΎΠ³ΠΎ Π³Π°Π·Ρƒ, ΠΊΠΎΠ»ΠΈ Ρ–ΠΎΠ½ΠΈ Π΄ΠΎΡΡΠ³Π°ΡŽΡ‚ΡŒ стінок розрядної ΠΊΠ°ΠΌΠ΅Ρ€ΠΈ Π±Π΅Π· Π·Ρ–Ρ‚ΠΊΠ½Π΅Π½ΡŒ. Для Π²ΠΈΠΏΠ°Π΄ΠΊΡƒ асимСтричних Π’Π§ Π΅Π»Π΅ΠΊΡ‚Ρ€ΠΎΠ΄Ρ–Π² ΠΏΠΎΠ±ΡƒΠ΄ΠΎΠ²Π°Π½Π° Ρ„Π΅Π½ΠΎΠΌΠ΅Π½ΠΎΠ»ΠΎΠ³ΠΈΡ‡Π½Π° модСль балансу потуТності, Ρ‰ΠΎ ΠΏΡ–Π΄Π²ΠΎΠ΄ΠΈΡ‚ΡŒΡΡ Π΄ΠΎ Π’Π§ розряду Π² залСТності Π²Ρ–Π΄ Π²Ρ–Π΄Π½ΠΎΡˆΠ΅Π½Π½Ρ ΠΏΠ»ΠΎΡ‰ Π’Π§ Π΅Π»Π΅ΠΊΡ‚Ρ€ΠΎΠ΄Ρ–Π² Ρ– Π°ΠΌΠΏΠ»Ρ–Ρ‚ΡƒΠ΄ΠΈ ΠΏΡ€ΠΈΠΊΠ»Π°Π΄Π΅Π½ΠΎΠ³ΠΎ Π’Π§ ΠΏΠΎΡ‚Π΅Π½Ρ†Ρ–Π°Π»Ρƒ. Розглянуті Π΄Π²Π° Ρ‚ΠΈΠΏΠΈ систСм: Π· ΠΎΠ΄Π½ΠΈΠΌ Ρ– Π΄Π²ΠΎΠΌΠ° Π’Π§ Π³Π΅Π½Π΅Ρ€Π°Ρ‚ΠΎΡ€Π°ΠΌΠΈ. ΠžΡ‚Ρ€ΠΈΠΌΠ°Π½Π° Π·Π°Π»Π΅ΠΆΠ½Ρ–ΡΡ‚ΡŒ складових потуТності, Ρ‰ΠΎ ΠΏΠΎΠ³Π»ΠΈΠ½Π°Ρ”Ρ‚ΡŒΡΡ Π² розряді Π² залСТності Π²Ρ–Π΄ Π·ΠΎΠ²Π½Ρ–ΡˆΠ½Ρ–Ρ… ΠΏΠ°Ρ€Π°ΠΌΠ΅Ρ‚Ρ€Ρ–Π² розряду. ВиявлСно існування максимума потуТності Π½Π° прискорСння Ρ–ΠΎΠ½Ρ–Π² Π½Π° Π΅Π»Π΅ΠΊΡ‚Ρ€ΠΎΠ΄ ΠΌΠ΅Π½ΡˆΠΎΡ— ΠΏΠ»ΠΎΡ‰Ρ–. Π—Π½Π°ΠΉΠ΄Π΅Π½Π° Π·Π°Π»Π΅ΠΆΠ½Ρ–ΡΡ‚ΡŒ полоТСння Π΄Π°Π½ΠΎΠ³ΠΎ максимума Π²Ρ–Π΄ ΠΏΠ°Ρ€Π°ΠΌΠ΅Ρ‚Ρ€Ρ–Π² систСми. Π Π΅Π·ΡƒΠ»ΡŒΡ‚Π°Ρ‚ΠΈ ΠΌΠΎΠΆΡƒΡ‚ΡŒ Π±ΡƒΡ‚ΠΈ використані як ΠΏΡ€ΠΈ ΠΊΠΎΠ½ΡΡ‚Ρ€ΡƒΡŽΠ²Π°Π½Π½Ρ– ΠΉ ΠΎΠΏΡ‚ΠΈΠΌΡ–Π·Π°Ρ†Ρ–Ρ— Ρ€ΠΎΠ·ΠΏΠΈΠ»ΡŽΠ²Π°Π»ΡŒΠ½ΠΈΡ… систСм Π½Π° Π±Π°Π·Ρ– ΠΊΠΎΠΌΠ±Ρ–Π½ΠΎΠ²Π°Π½ΠΎΠ³ΠΎ розряду, Ρ‚Π°ΠΊ Ρ– для подальшого Ρ€ΠΎΠ·Π²ΠΈΡ‚ΠΊΡƒ ΠΌΠΎΠ΄Π΅Π»ΡŒΠ½ΠΈΡ… ΡƒΡΠ²Π»Π΅Π½ΡŒ ΠΏΡ€ΠΎ Ρ„Ρ–Π·ΠΈΠΊΡƒ Π’Π§ розрядів.Π’ Ρ€Π°Π±ΠΎΡ‚Π΅ рассматриваСтся ΠΊΠΎΠΌΠ±ΠΈΠ½ΠΈΡ€ΠΎΠ²Π°Π½Π½Ρ‹ΠΉ ΠΈΠ½Π΄ΡƒΠΊΡ†ΠΈΠΎΠ½Π½ΠΎ-Смкостной Π’Π§ разряд Π² области Π½ΠΈΠ·ΠΊΠΎΠ³ΠΎ давлСния Ρ€Π°Π±ΠΎΡ‡Π΅Π³ΠΎ Π³Π°Π·Π°, ΠΊΠΎΠ³Π΄Π° ΡƒΡ…ΠΎΠ΄ ΠΈΠΎΠ½ΠΎΠ² ΠΈΠ· ΠΏΠ»Π°Π·ΠΌΡ‹ Π½Π° стСнки разрядной ΠΊΠ°ΠΌΠ΅Ρ€Ρ‹ происходит Π±Π΅Π· столкновСний. Для случая асиммСтричных Π’Π§ элСктродов построСна фСномСнологичСская модСль баланса ΠΏΠΎΠ΄Π²ΠΎΠ΄ΠΈΠΌΠΎΠΉ ΠΊ разряду Π’Π§ мощности Π² зависимости ΠΎΡ‚ ΠΎΡ‚Π½ΠΎΡˆΠ΅Π½ΠΈΡ ΠΏΠ»ΠΎΡ‰Π°Π΄Π΅ΠΉ Π’Π§ элСктродов ΠΈ Π°ΠΌΠΏΠ»ΠΈΡ‚ΡƒΠ΄Ρ‹ ΠΏΡ€ΠΈΠ»ΠΎΠΆΠ΅Π½Π½ΠΎΠ³ΠΎ Π’Π§ ΠΏΠΎΡ‚Π΅Π½Ρ†ΠΈΠ°Π»Π°. РассмотрСны Π΄Π²Π° Ρ‚ΠΈΠΏΠ° систСм: с ΠΎΠ΄Π½ΠΈΠΌ ΠΈ двумя Π’Π§ Π³Π΅Π½Π΅Ρ€Π°Ρ‚ΠΎΡ€Π°ΠΌΠΈ. ΠŸΠΎΠ»ΡƒΡ‡Π΅Π½Ρ‹ зависимости ΡΠΎΡΡ‚Π°Π²Π»ΡΡŽΡ‰ΠΈΡ… ΠΏΠΎΠ³Π»ΠΎΡ‰Π°Π΅ΠΌΠΎΠΉ Π² разрядС мощности Π² зависимости ΠΎΡ‚ Π²Π½Π΅ΡˆΠ½ΠΈΡ… ΠΏΠ°Ρ€Π°ΠΌΠ΅Ρ‚Ρ€ΠΎΠ² разряда. ΠžΠ±Π½Π°Ρ€ΡƒΠΆΠ΅Π½ΠΎ сущСствованиС максимума мощности Π½Π° ускорСниС ΠΈΠΎΠ½ΠΎΠ² Π½Π° элСктрод мСньшСй ΠΏΠ»ΠΎΡ‰Π°Π΄ΠΈ. НайдСна Π·Π°Π²ΠΈΡΠΈΠΌΠΎΡΡ‚ΡŒ полоТСния Π΄Π°Π½Π½ΠΎΠ³ΠΎ максимума ΠΎΡ‚ ΠΏΠ°Ρ€Π°ΠΌΠ΅Ρ‚Ρ€ΠΎΠ² систСмы. Π Π΅Π·ΡƒΠ»ΡŒΡ‚Π°Ρ‚Ρ‹ ΠΌΠΎΠ³ΡƒΡ‚ Π±Ρ‹Ρ‚ΡŒ ΠΈΡΠΏΠΎΠ»ΡŒΠ·ΠΎΠ²Π°Π½Ρ‹ ΠΊΠ°ΠΊ ΠΏΡ€ΠΈ конструировании ΠΈ ΠΎΠΏΡ‚ΠΈΠΌΠΈΠ·Π°Ρ†ΠΈΠΈ Ρ€Π°ΡΠΏΡ‹Π»ΠΈΡ‚Π΅Π»ΡŒΠ½Ρ‹Ρ… систСм Π½Π° Π±Π°Π·Π΅ ΠΊΠΎΠΌΠ±ΠΈΠ½ΠΈΡ€ΠΎΠ²Π°Π½Π½ΠΎΠ³ΠΎ разряда, Ρ‚Π°ΠΊ ΠΈ для дальнСйшСго развития ΠΌΠΎΠ΄Π΅Π»ΡŒΠ½Ρ‹Ρ… прСдставлСний ΠΎ Ρ„ΠΈΠ·ΠΈΠΊΠ΅ Π’Π§ разрядов

    Bone-like coatings deposition by using of modern pulsed ion-plasma technology

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    The technology of synthesis of multilayer coatings on the basis of alumina oxide and structures, like tricalcium phosphate and hydroxylapatite, was suggested by Reactive Ion-Beam Synthesis (RIBS) method in a same vacuum cycle. The substance of the method consists in a physical sputtering of target of compound composition on the specimens with its simultaneous bombardment by intensive ion beams of chemically active gases. The concurrent using of pulsed ion-plasma technology offer the ability to beneficially modify a wide array of surface properties at low temperature; to increase adhesion, density, deposition rate and quality of oxide coatings, to deposit complex multilayer dielectric coatings with ultra disperse structure. The analysis of results obtained in the work, allows to make a conclusion about the advantages of combining of pulsed ion-plasma technology with RIBS method using for the purpose of strong attachment of metal prosthesis in bone tissue and the activation of osseogenesis and osseointegration processes.ВСхнологія нанСсСння Π±Π°Π³Π°Ρ‚ΠΎΡˆΠ°Ρ€ΠΎΠ²ΠΈΡ… ΠΏΠΎΠΊΡ€ΠΈΡ‚Ρ‚Ρ–Π² Π½Π° основі оксиду Π°Π»ΡŽΠΌΡ–Π½Ρ–ΡŽ Ρ‚Π° структур, Ρ‚ΠΈΠΏΡƒ Ρ‚Ρ€ΠΈΠΊΠ°Π»ΡŒΡ†Ρ–ΠΉΡ„ΠΎΡΡ„Π°Ρ‚ Ρ‚Π° гідроксилапатит Π·Π°ΠΏΡ€ΠΎΠΏΠΎΠ½ΠΎΠ²Π°Π½Π° ΠΌΠ΅Ρ‚ΠΎΠ΄ΠΎΠΌ Ρ€Π΅Π°ΠΊΡ‚ΠΈΠ²Π½ΠΎΠ³ΠΎ Ρ–ΠΎΠ½Π½ΠΎ-ΠΏΠ»Π°Π·ΠΌΠΎΠ²ΠΎΠ³ΠΎ синтСзу (Π Π†ΠŸΠ‘) Π² Ρ”Π΄ΠΈΠ½ΠΎΠΌΡƒ Π²Π°ΠΊΡƒΡƒΠΌΠ½ΠΎΠΌΡƒ Ρ†ΠΈΠΊΠ»Ρ–. Π‘ΡƒΡ‚Π½Ρ–ΡΡ‚ΡŒ ΠΌΠ΅Ρ‚ΠΎΠ΄Ρƒ полягає Ρƒ Ρ„Ρ–Π·ΠΈΡ‡Π½ΠΎΠΌΡƒ Ρ€ΠΎΠ·ΠΏΠΈΠ»Π΅Π½Π½Ρ– ΠΌΡ–ΡˆΠ΅Π½Ρ– складного стСхіомСтричного складу Π½Π° ΠΏΡ–Π΄ΠΊΠ»Π°Π΄Π΅Π½ΠΊΡƒ Π· Ρ—Ρ— одночасним бомбардуванням інтСнсивними Ρ–ΠΎΠ½Π½ΠΈΠΌΠΈ ΠΏΡƒΡ‡ΠΊΠ°ΠΌΠΈ Ρ…Ρ–ΠΌΡ–Ρ‡Π½ΠΎ Π°ΠΊΡ‚ΠΈΠ²Π½ΠΈΡ… Π³Π°Π·Ρ–Π². БуміснС використання Ρ–ΠΌΠΏΡƒΠ»ΡŒΡΠ½ΠΎΡ— Ρ–ΠΎΠ½Π½ΠΎ-ΠΏΠ»Π°Π·ΠΌΠΎΠ²ΠΎΡ— Ρ‚Π΅Ρ…Π½ΠΎΠ»ΠΎΠ³Ρ–Ρ— дозволяє ΡƒΡΠΏΡ–ΡˆΠ½ΠΎ Π·ΠΌΡ–Π½ΡŽΠ²Π°Ρ‚ΠΈ Π² ΡˆΠΈΡ€ΠΎΠΊΠΎΠΌΡƒ Π΄Ρ–Π°ΠΏΠ°Π·ΠΎΠ½Ρ– ΠΏΠΎΠ²Π΅Ρ€Ρ…Π½Π΅Π²Ρ– властивості ΠΎΡ‚Ρ€ΠΈΠΌΠ°Π½ΠΈΡ… ΠΏΠΎΠΊΡ€ΠΈΡ‚Ρ‚Ρ–Π²: ΠΏΡ–Π΄Π²ΠΈΡ‰ΠΈΡ‚ΠΈ Π°Π΄Π³Π΅Π·Ρ–ΡŽ, Ρ‰Ρ–Π»ΡŒΠ½Ρ–ΡΡ‚ΡŒ, ΡˆΠ²ΠΈΠ΄ΠΊΡ–ΡΡ‚ΡŒ нанСсСння Ρ‚Π° ΡΠΊΡ–ΡΡ‚ΡŒ оксидних ΠΏΠΎΠΊΡ€ΠΈΡ‚Ρ‚Ρ–Π², Π° Ρ‚Π°ΠΊΠΎΠΆ ΠΎΡ‚Ρ€ΠΈΠΌΠ°Ρ‚ΠΈ Π±Π°Π³Π°Ρ‚ΠΎΡˆΠ°Ρ€ΠΎΠ²Ρ– Π΄Ρ–Π΅Π»Π΅ΠΊΡ‚Ρ€ΠΈΡ‡Π½Ρ– покриття Π· ΡƒΠ»ΡŒΡ‚Ρ€Π°Π΄ΠΈΡΠΏΠ΅Ρ€ΡΠ½ΠΎΡŽ ΡΡ‚Ρ€ΡƒΠΊΡ‚ΡƒΡ€ΠΎΡŽ. Аналіз ΠΎΡ‚Ρ€ΠΈΠΌΠ°Π½ΠΈΡ… Ρ€Π΅Π·ΡƒΠ»ΡŒΡ‚Π°Ρ‚Ρ–Π² дозволяє Π·Ρ€ΠΎΠ±ΠΈΡ‚ΠΈ висновок відносно Π·Π½Π°Ρ‡Π½ΠΈΡ… ΠΏΠ΅Ρ€Π΅Π²Π°Π³ сумісного використання Ρ–ΠΌΠΏΡƒΠ»ΡŒΡΠ½ΠΎΡ— Ρ–ΠΎΠ½Π½ΠΎ-ΠΏΠ»Π°Π·ΠΌΠΎΠ²ΠΎΡ— Ρ‚Π΅Ρ…Π½ΠΎΠ»ΠΎΠ³Ρ–Ρ— Ρ‚Π° ΠΌΠ΅Ρ‚ΠΎΠ΄Ρƒ Π Π†ΠŸΠ‘ Π· ΠΌΠ΅Ρ‚ΠΎΡŽ забСзпСчСння Π½Π°Π΄Ρ–ΠΉΠ½ΠΎΡ— фіксації ΠΌΠ΅Ρ‚Π°Π»Π΅Π²ΠΎΠ³ΠΎ ΠΏΡ€ΠΎΡ‚Π΅Π·Ρƒ Ρƒ кістковій Ρ‚ΠΊΠ°Π½ΠΈΠ½Ρ– Ρ‚Π° Π°ΠΊΡ‚ΠΈΠ²Π°Ρ†Ρ–Ρ— процСсів остСосинтСзу Ρ‚Π° остСоінтСграції.ВСхнология нанСсСния многослойных ΠΏΠΎΠΊΡ€Ρ‹Ρ‚ΠΈΠΉ Π½Π° основС оксида алюминия ΠΈ структур, Ρ‚ΠΈΠΏΠ° Ρ‚Ρ€ΠΈΠΊΠ°Π»ΡŒΡ†ΠΈΠΉΡ„ΠΎΡΡ„Π°Ρ‚ ΠΈ гидроксилапатит прСдлагаСтся ΠΌΠ΅Ρ‚ΠΎΠ΄ΠΎΠΌ Ρ€Π΅Π°ΠΊΡ‚ΠΈΠ²Π½ΠΎΠ³ΠΎ ΠΈΠΎΠ½Π½ΠΎ-ΠΏΡƒΡ‡ΠΊΠΎΠ²ΠΎΠ³ΠΎ синтСза (РИПБ) Π² Π΅Π΄ΠΈΠ½ΠΎΠΌ Π²Π°ΠΊΡƒΡƒΠΌΠ½ΠΎΠΌ Ρ†ΠΈΠΊΠ»Π΅. Π‘ΡƒΡ‰Π½ΠΎΡΡ‚ΡŒ ΠΌΠ΅Ρ‚ΠΎΠ΄Π° состоит Π² физичСском распылСнии мишСни слоТного стСхиомСтричСского состава Π½Π° ΠΎΠ±Ρ€Π°Π·Π΅Ρ† с Π΅Π³ΠΎ ΠΎΠ΄Π½ΠΎΠ²Ρ€Π΅ΠΌΠ΅Π½Π½ΠΎΠΉ Π±ΠΎΠΌΠ±Π°Ρ€Π΄ΠΈΡ€ΠΎΠ²ΠΊΠΎΠΉ интСнсивными ΠΈΠΎΠ½Π½Ρ‹ΠΌΠΈ ΠΏΡƒΡ‡ΠΊΠ°ΠΌΠΈ химичСски Π°ΠΊΡ‚ΠΈΠ²Π½Ρ‹Ρ… Π³Π°Π·ΠΎΠ². БовмСстноС ΠΏΡ€ΠΈΠΌΠ΅Π½Π΅Π½ΠΈΠ΅ ΠΈΠΌΠΏΡƒΠ»ΡŒΡΠ½ΠΎΠΉ ΠΈΠΎΠ½Π½ΠΎ-ΠΏΠ»Π°Π·ΠΌΠ΅Π½Π½ΠΎΠΉ Ρ‚Π΅Ρ…Π½ΠΎΠ»ΠΎΠ³ΠΈΠΈ позволяСт ΡƒΡΠΏΠ΅ΡˆΠ½ΠΎ Π²Π°Ρ€ΡŒΠΈΡ€ΠΎΠ²Π°Ρ‚ΡŒ Π² ΡˆΠΈΡ€ΠΎΠΊΠΎΠΌ Π΄ΠΈΠ°ΠΏΠ°Π·ΠΎΠ½Π΅ повСрхностныС свойства ΠΏΠΎΠ»ΡƒΡ‡Π°Π΅ΠΌΡ‹Ρ… ΠΏΠΎΠΊΡ€Ρ‹Ρ‚ΠΈΠΉ: ΠΏΠΎΠ²Ρ‹ΡˆΠ°Ρ‚ΡŒ адгСзию, ΠΏΠ»ΠΎΡ‚Π½ΠΎΡΡ‚ΡŒ, ΡΠΊΠΎΡ€ΠΎΡΡ‚ΡŒ нанСсСния ΠΈ качСство оксидных ΠΏΠΎΠΊΡ€Ρ‹Ρ‚ΠΈΠΉ, Π° Ρ‚Π°ΠΊΠΆΠ΅ Π½Π°Π½ΠΎΡΠΈΡ‚ΡŒ многослойныС диэлСктричСскиС покрытия с ΡƒΠ»ΡŒΡ‚Ρ€Π°Π΄ΠΈΡΠΏΠ΅Ρ€ΡΠ½ΠΎΠΉ структурой. Анализ Ρ€Π΅Π·ΡƒΠ»ΡŒΡ‚Π°Ρ‚ΠΎΠ², ΠΏΠΎΠ»ΡƒΡ‡Π΅Π½Π½Ρ‹Ρ… Π² Ρ€Π°Π±ΠΎΡ‚Π΅, позволяСт ΡΠ΄Π΅Π»Π°Ρ‚ΡŒ Π²Ρ‹Π²ΠΎΠ΄ ΠΎ прСимущСствах ΠΊΠΎΠΌΠ±ΠΈΠ½ΠΈΡ€ΠΎΠ²Π°Π½Π½ΠΎΠ³ΠΎ использования ΠΈΠΌΠΏΡƒΠ»ΡŒΡΠ½ΠΎΠΉ ΠΈΠΎΠ½Π½ΠΎ-ΠΏΠ»Π°Π·ΠΌΠ΅Π½Π½ΠΎΠΉ Ρ‚Π΅Ρ…Π½ΠΎΠ»ΠΎΠ³ΠΈΠΈ ΠΈ ΠΌΠ΅Ρ‚ΠΎΠ΄Π° РИПБ для обСспСчСния Π½Π°Π΄Π΅ΠΆΠ½ΠΎΠΉ фиксации мСталличСского ΠΏΡ€ΠΎΡ‚Π΅Π·Π° Π² костной Ρ‚ΠΊΠ°Π½ΠΈ ΠΈ Π°ΠΊΡ‚ΠΈΠ²Π°Ρ†ΠΈΠΈ процСссов остСосинтСза ΠΈ остСоинтСграции

    Development tools students' speed qualities in a period of swimming butterfly

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    Three trainings systems are developed for speeding up for students with the middle level of qualification. 9 sportsmen took part in research. Among them there are 6 youths and 3 girls. For three months of trainings for the sportsmen of the second group it was exhaust 9 the most essential technical elements in swimming on 50 m. A middle index of improvement of results is 1,46 s. The considerable improvement of results is marked for students the first and third groups (used a method: to power and speed endurance)

    Grounding of ecological and economical operating efficiency of hydroelectric power plant

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    Mail client with data transfer protected with end-to-end encryption

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    This article is devoted to the study of the issues of secure messaging and file exchange by e-mail at the enterprises of the agro-industrial complex. The purpose of this work is to develop an algorithmic support and software of mail client that supports the functionality of end-to-end data encryption. The following research methods are used in the article: comparison method, observation method, structural analysis method. The comparison method is used to identify differences between key distribution protocols. Methods of observation and analysis make it possible to understand the behavior of various protocols within systems that differ in technical and software properties. The article consists of four parts: Introduction, Materials and Methods, Results, Conclusions. The first part describes the relevance of the topic, discusses the features of various cryptographic protocols. The second part describes the developed algorithms that ensure the operation of the mail client and end-to-end data encryption. The third part discusses the results of software implementation of the developed algorithms. In the fourth part conclusions are made and summed up. The main results of the work are algorithmic implementation of software for local architecture based on the use of symmetric cryptography; a software tool designed according to a local scheme, including modules that allow you to develop a system on a client-server architecture

    Improving aquaaerobics as means of hydrorehabilitation of students of special medical groups.

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    The questions which concern with estimate of implementation of aquaaerobics in an educational process of physical culture of students with weakened health were examined. In experiment took place 76 students of Law Academy. The data that were used in this research were taken from a questionnaire survey that was made among students, analysis of methodological literature and own practical experience. The experimental program of aquaaerobical studies with students of special medical group was developed .The analysis of students quantity of special medical groups which attended physical training studies showed that aquaaerobisc appeared no less attractive then medical swimming
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