Nonlinear Dynamics of Composite Plates and Shells

The equations of refined geometrically nonlinear theory of dynamic deformation of flexible with respect to transversal shear and compression ofplates and shells are proposed. The solutions for problems of transversal nonlinear vibrations of hinge fixedplate-strip are obtained. Numerical results are compared with the known in literature

ANALYSIS OF THE CHEMICAL COMPOSITION OF CHAROITE ROCKS

The unique charoite mineralization, established on the Murun alkaline massif in the northwestern part of the Aldan shield on the border of the Irkutsk region and Yakutia, is still of great interest to some of researchers (geologists, crystallographers, geochemists, etc.). The outcrops of charoite-bearing rocks at the “Sirenevyi Kamen” deposit are noted both in the indigenous outcrops and in eluvial clatters [Bondarenko, 2009].The unique charoite mineralization, established on the Murun alkaline massif in the northwestern part of the Aldan shield on the border of the Irkutsk region and Yakutia, is still of great interest to some of researchers (geologists, crystallographers, geochemists, etc.). The outcrops of charoite-bearing rocks at the “Sirenevyi Kamen” deposit are noted both in the indigenous outcrops and in eluvial clatters [Bondarenko, 2009]

Method of Determination of Natural Frequencies and Forms of Nonlinear Vibrations for Layered Cylindrical Panels

The technique of finding a finite number of first natural frequencies for geometrically nonlinear vibrations of layered elongated cylindrical panels at discrete consideration of components is proposed and verified. The influence of the radius of curvature on the natural frequencies of three- and five-layered panels is investigated. The dependence between the volume of filler three-layer panels and the lowest natural frequency has been established

ОСНОВНІ НАПРЯМКИ РЕФОРМУВАННЯ ВИБОРЧОГО ЗАКОНОДАВСТВА УКРАЇНИ

In order to raise the efficiency of the electoral process in Ukraine the authors have studied the topical issues concerning the regulation of certain provisions of the institution of parliamentary elections in Ukraine. The problem of the functioning of representative democracy has been considered through the analysis of the elements of the electoral system with the task of theoretical modeling of the most optimal variant of the elements set of the electoral system, which may reflect the real state of representation in the parliament. Theoretical and legal analysis of such components of the electoral system as a constituency, electoral (party) list, ways of voting. The authors have concluded that the major shortcoming of the current electoral system in Ukraine is closed electoral lists that contribute to the formation of political clans, with the party members’ dependence from the political leader, who actually generates a list and makes it impossible for the voters’ real ability to express their preferences for specific candidates. Besides, the relationship between the MPs and constituencies residents is completely dissolved, and eventually an MP is not a representative of the voters, but a hostage of a party leader. Considering the experience of previous years, the authors have suggested to reform the electoral system of Ukraine, namely: to guarantee the transparency of electoral lists; to provide preferential voting patterns (where the voters vote both for a party list and for specific candidates from the list); to provide ordinal ballot papers for voters (the voter’s opportunity to determine the procedure of obtaining mandates within the party list).Розглянуто актуальні питання регулювання окремих положень інституту виборів народних депутатів України. Проблему функціонування представницької демократії розглянуто крізь аналіз елементів виборчої системи із завданням теоретичного моделювання найбільш оптимального варіанту набору елементів виборчої системи, яка зможе відобразити реальний стан представництва в парламенті. Проведено теоретико-правовий аналіз таких складових виборчої системи, як виборчий округ, виборчий (партійний) список, способи голосування. Негативно охарактеризовано положення виборчого законодавства у питанні використання інституту закритих партійних списків

Formation of zonal agro-eco clusters as a mechanism for the development of rural areas

Today, the degree of agricultural development, and, in the future, the level of national food security, the public health and the quality of life, are largely ensured by innovative developments in the field of alternative agriculture, the preservation of natural resources and, above all, the main production facility – land. At the same time, the unfilled market capacity of organic products and the significant land potential for the development of organic farming create all the necessary prerequisites for enhancing the competitiveness of Russian rural producers. The development of agricultural entrepreneurship towards the greening of land use, organic production and development of the domestic market for organic (ecological) products in the format of zonal agro-eco clusters is one of the strategic directions for implementing reforms in the agricultural sector. The paper presents the directions of the formation and development of zonal agro-eco clusters for the production, processing and sale of organic products in the agricultural regions of Russia.peer-reviewe

Quantum Transparency of Barriers for Structure Particles

Penetration of two coupled particles through a repulsive barrier is considered. A simple mechanism of the appearance of barrier resonances is demonstrated that makes the barrier anomalously transparent as compared to the probability of penetration of structureless objects. It is indicated that the probabilities of tunnelling of two interacting particles from a false vacuum can be considerably larger than it was assumed earlier.Comment: Revtex, 4 pages, 4 figure

ПОРІВНЯЛЬНА ОЦІНКА ЯКОСТІ ЖИТТЯ ПІСЛЯОПЕРАЦІЙНИХ ХВОРИХ ІЗ КАЛЬКУЛЬОЗНИМ ХОЛЕЦИСТИТОМ ТА ХОЛЕДОХОЛІТІАЗОМ

Purpoe: to collect and calculate indicators of quality of life in postoperative patients with gallstones of gall bladder and common bile duct. To compare data from patients with open and laparoscopic treatment. To determine optimal way of treatment. Materials and Methods. For rating quality of life 36-Item Short-Form Health Status (SF-36) was used. The statistic was collected using retrospective analysis of worked out data in laparoscopic surgery unit in Volyn Regional State Hospital where patients underwent surgical treatment (2016–2018). There were 126 patients: 52 patients who underwent conventional surgical treatment (group I) and 74 who underwent laparoscopic treatment (group II). Results and Discussion. After analysis and summarization of statistics, it was noted that the pain syndrome in patients in group I was present only in the first 2 days, and on the second day after surgery was observed only during active movement. In group II, the pain lasted from 4 to 7 days. ERAS (Enhanced Recovery After Surgery) principles were used in both groups. Independent getting up of patients in group I was possible in (4.1±1.9) hours, in group II (19.7±3.3) hours after the operation was completed. Oral nutrition was resumed in patients in group I  after (14.7±3.1) hours, in group II after (25.9±5.5) hours after the operation was completed. Data on the well-being of operated patients are shown in graphs 1 and 2 for the groups respectively. Conclusions. Simultaneous laparoscopic operations for the treatment of cholecystitis and choledocholithiasis show high efficacy and safety. Feeling better, less pain and shoter recovery period give the patient physical relief, which guarantees both psychological comfort and rapid recovery of general well-being in the short term and in the long run after laparoscopic cholecystectomy and choledocholithotomy.Мета: визначити показники якості життя у післяопераційних хворих із конкрементами у жовчному міхурі та загальній жовчній протоці. Порівняти хворих, яким виконували лапароскопічну і відкриту операції. Знайти оптимальний шлях лікування. Матеріали і методи. Для оцінки якості життя використовували опитувальник 36-Item Short-Form Health Status (SF-36). Статистичні дані отримані шляхом ретроспективного аналізу даних, напрацьованих під час лікування хворих в умовах відділення інвазивних методів діагностики та лікування Волинської обласної клінічної лікарні в 2016–2018 рр., а саме: 126 пацієнтів (І група – 52 хворих групи відкритого операційного лікування; ІІ група – 74 хворих групи лапароскопічного лікування). Результати. Після аналізу і підведення статистики було відмічено, що больовий синдром у хворих з І групи був наявним лише в перші 2 дні, при чому на другий день після операції відзначався лише при активному русі. У ІІ групі больовий синдром тривав від 4 до 7 днів. В обох групах використовували принципи ERAS (Enhanced Recovery After Surgery). Самостійне вставання хворих у І групі було можливим через (4,1±1,9) год, у ІІ групі – (19,7±3,3) год після завершення операції. Пероральне харчування відновили у хворих в І групі через (14,7±3,1) год, у ІІ групі – (25,9±5,5) год після завершення операції. Дані про самопочуття прооперованих пацієнтів наведені на рисунках 1 і 2 для групи лапароскопічного лікування жовчнокам'яної хвороби і відкритого відповідно. Висновки. Симультанні лапароскопічні операції з приводу лікування холециститу та холедохолітіазу показують високу ефективність і безпеку. Краще самопочуття, менший больовий синдром і період відновлення сил надають хворому полегшення фізичне, що гарантує і психологічний комфорт та швидке відновлення загального самопочуття в короткі терміни, і в тривалій перспективі після лапароскопічної холецистектомії та холедохолітотомії

Перший досвід впровадження малоінвазивних технологій в кардіохірургічній практиці

Aim of work: the article adduces a possibility of using mini-invasive technology in cardiac surgeryЦель работы: в статье рассмотрено возможность использования малоинвазивных методов в кардиохирургии.Мета роботи: у статті розглянуто можливість використання малоінвазивних методів у кардіохірургії

New Interstellar Extinction Maps Based on Gaia and Other Sky Surveys

We present new three-dimensional (3D) interstellar extinction maps in the $V$ and Gaia $G$ filters within 2 kpc of the Sun, a 3D differential extinction (dust spatial distribution density) map along the lines of sight in the same space, a 3D map of variations in the ratio of the extinctions in the $V$ and Gaia $G$ filters within 800 pc of the Sun, and a 2D map of total Galactic extinction through the entire dust half-layer from the Sun to extragalactic space for Galactic latitudes $|b|>13^{\circ}$. The 3D maps have a transverse resolution from 3.6 to 11.6 pc and a radial resolution of 50 pc. The 2D map has an angular resolution of 6.1 arcmin. We have produced these maps based on the Gaia DR3 parallaxes and Gaia, Pan-STARRS1, SkyMapper, 2MASS, and WISE photometry for nearly 100 million stars. We have paid special attention to the space within 200 pc of the Sun and high Galactic latitudes as regions where the extinction estimates have had a large relative uncertainty so far. Our maps estimate the extinction within the Galactic dust layer from the Sun to an extended object or through the entire dust half-layer from the Sun to extragalactic space with a precision $\sigma(A_\mathrm{V})=0.06$ mag. This gives a high relative precision of extinction estimates even at high Galactic latitudes, where, according to our estimates, the median total Galactic extinction through the entire dust half-layer from the Sun to extragalactic objects is $A_\mathrm{V}=0.12\pm0.06$ mag. We have shown that the presented maps are among the best ones in data amount, space size, resolution, precision, and other properties.Comment: 15 pages, 4 table