Examination of negative side effects caused by the corrosion preventive compounds

В статті представлені вимоги до процедури оцінки негативних побічних ефектів, спричинених застосуванням антикорозійних сполук або інших поверхнево-активних речовин, які застосовуються в авіації. Показано, що негативний вплив на втому конструкцій літака має бути проаналізований на різних стадіях втоми та на різних масштабних рівнях. Розглянуто три аспекти загальної методології: вплив поверхнево-активних речовин на стадії зародження втомних тріщин, відомий як ефект Ребіндера; вплив поверхнево-активних речовин на швидкість розповсюдження втомних тріщин; зменшення втомної довговічності заклепкових з’єднань як результат зменшення сил тертя між листами обшивки. Показано, що всі ці підходи можуть бути об’єднані в одну загальну методологію сертифікації антикорозійних сполук

Theoretical and methodical essence of technology transfer on the basis of entreprenry and intrapreneurship

In the article it is proved that a considerable part of scientific developments of industrial enterprises, in most cases quite effective and promising, remain unclaimed; high, and in most cases inaccessible even to the technological product development companies themselves. their commercialization (transfer) costs are not high enough, and in most cases not accessible even to the technological product development companies themselves. The conceptual and categorical apparatus of technology transfer has been clarified. It is proved that transfer of technologies developed at machine-building enterprises can be carried out mainly with the use of two entrepreneurial institutions: entrepreneurship (external transfer) and intrapreneurship (intra-firm transfer). Possible organizational and economic forms of the end result have been formed when used in machine-building enterprises of entreprenry and intrapreneurship. The basic prerequisites for the formation and use of integrated high technologies at machine-building enterprises, which most closely meet the economic and legal criteria of the transfer process. Such prerequisites, in particular, include: increase in the scientific and technological capacity, complication of engineering products, acceleration of scientific and technological progress, introduction of intellectual development in the production, increasing the level of market competition, etc. A detailed analysis of the current state of the domestic technological market has been carried out, and the main positive and negative factors have been identified, which most or not ensure the effectiveness of its functioning. It was found that the level of financial support for innovative activity in the country (0.3-0.4% of GDP) is not able to ensure the effectiveness of scientific research. Obstacles to the effective implementation of intra-company technology transfer at machinebuilding enterprises are identified and generalized. These include economic, scientific, technical, social and political obstacles

Intra-firm technology transfer as a factor of sustainable development of industrial enterprises

Technological processes of machine-building enterprises are quite specific, characteristic only for this sector and are virtually absent from all the others. In recent times, scientists and developers of technology products in the engineering industry increasingly focused on development of unconventional technologies, the possibility of the development of which is based on significant achievements in fundamental and applied research

Surface of metal as an indicator of fatigue damage

Advances in Military Technology, Vol. 8, No. 2, December 2013The possibility of fatigue damage analysis by the extrusion/intrusion structures on the surface of aluminium alloy is shown. Quantitative characteristics of the extrusion/intrusion structures and the methods for their monitoring are substantiated. Two approaches for fatigue analysis are presented: a) direct inspection of the aircraft components, b) application of fatigue sensors

Definition of ranking of regions by the level of investment attractiveness (on the example of Poltava region)

Статтю присвячено розробці теоретичного та методологічного забезпечення формування сприятливої інвестиційної привабливості регіону з метою забезпечення поступального розвитку. Визначено фактори та обґрунтовано систему показників, що впливають на ступінь інвестиційної привабливості регіону. Досліджено причини низької інвестиційної активності в регіонах України та чинники, які гальмують інвестиційний процес. Сформульовано напрями інвестиційної політики на сучасному етапі розвитку економіки. Запропоновано перелік найбільш значущих регіональних та загальнодержавних факторів, які позитивно впливають на інвестиційне середовище регіону. Проаналізовано методичні підходи та параметри визначення інвестиційної привабливості регіонів України. Систематизовано інформацію про рівень інвестиційної привабливості Полтавської області.Статья посвящена разработке теоретического и методологического обеспечения формирования благоприятной инвестиционной привлекательности региона с целью обеспечения поступательного развития. Определены факторы и обоснована система показателей, влияющих на степень инвестиционной привлекательности региона. Исследованы причины низкой инвестиционной активности в регионах Украины и факторы, которые тормозят инвестиционный процесс. Сформулированы направления инвестиционной политики на современном этапе развития экономики. Предложен перечень наиболее значимых региональных и общегосударственных факторов, которые положительно влияют на инвестиционную среду региона. Проанализированы методические подходы и параметры определения инвестиционной привлекательности регионов Украины. Систематизирована информация об уровне инвестиционной привлекательности Полтавской области.The article is devoted to development of theoretical and methodological support for the formation of favorable investment attractiveness of the region to ensure sustainable development. Factors are defined and parameters system is substantiated that affect the degree of investment attractiveness of the region. The reasons of low investment activity in the regions of Ukraine, the factors that hinder the investment process are examined; the directions of investment policy at the present stage of economic development are formulated. The list of the most important regional and national factors that positively affect the investment environment in the region is proposed. Methodological approaches and parameters determining investment attractiveness of regions of Ukraine are analyzed. Information on the level of investment attractiveness of the Poltava region is systematized

Structure, optical, electrical and thermoelectric properties of solution-processed Li-doped NiO films grown by SILAR

The article presents a new facial synthesis of Li-doped NiO films (NiO:Li) via an easy and cost-effective method Successive Ionic Layer Adsorption and Reaction (SILAR) with the processing of the obtained NiO films in a lithium-containing aqueous solution for their transformation after annealing into NiO:Li layers. Comparative analysis of crystal structure, optical, electrical and thermoelectric properties of the obtained NiO and NiO:Li 420-1050 nm thick films have reveiled a cubic rock-salt NiO structure, at that, NiO:Li samples are nanocrystalline single phased Li-NiO solid solutions. The fabricated NiO and NiO:Li films are p-type semiconductors with activation energy Ea = 0.1 eV and Ea = 0.25‒0.31 eV, respectively. The obtained in-plane Seebeck coefficients Z are in the range 0.20–0.33 mV/К. Notwithstanding the fact that the maximum values of the thermoelectric power factors P=2.2 μW/K2·m, are rather small, they were achieved if the hot end of the NiO:Li film was heated only to 115 °C. Thus, the produced in this work new low cost thermoelectric thin film material is suitable for a production of electrical energy for low-power devices due to absorption of low-potential heat

The effect of Aronia melanocarpa extract on the phospholipid composition of the rat myocardium during stress

The research was performed on 80 male rats of the Wistar line. Animals of two age groups were used: adults (10–12 months) and old (22–25 months). The obtained data show that the development of immobilization stress in adult and aged rats are accompanied by the formation of a characteristic complex of changes in the phospholipid composition of the myocardium. Intraperitoneal injection of the chokeberry extract (Aronia melanocarpa) at a dose of 0.2 g/kg 60 minutes before the immobilization has limited stress modulation of myocardial phospholipid composition in aged animals. Thus, the extract of Aronia melanocarpa increases the myocardial resistance to the injury effect of stress. Výzkum byl proveden na 80 samcích potkanů linie Wistar. Byla použita zvířata dvou věkových skupin: dospělí (10–12 měsíců) a staří (22–25 měsíců). Získaná data ukazují, že rozvoj imobilizačního stresu u dospělých a starých potkanů je doprovázen tvorbou charakteristického komplexu změn ve fosfolipidovém složení myokardu. Intraperitoneální injekce extraktu z temnoplodce černoplodého (Aronia melanocarpa) v dávce 0,2 g/kg 60 minut před imobilizací má omezenou modulaci stresu složení fosfolipidů myokardu u starých zvířat. Extrakt z Aronia melanocarpa tak zvyšuje odolnost myokardu vůči negativnímu účinku stres

Antioksidativna aktivnost metanolskog ekstrakta lista biljke Saxifraga Rotundifolia L.

The aim of this study was to investigate the potential antioxidant activity of the methanol leaf extract of Saxifraga rotundifolia L., depending on the total quantity of phenols, flavonoids and flavonol. The tested extracts showed high phenolic content (324.39 mg GA/g) and small amounts of flavonoids (36.81 mg RU/g) and flavonols (11.52 mg RU/g). The antioxidant activity was determined by a series of in vitro methods. The tested extracts showed high level of total antioxidant activity (509.78 mg AA/g), and high degree of ABTS+ and DPPH "scavenger" activity with IC50 value of 48.76 μg/mL for ABTS+ method and 30.39 μg/mL for DPPH method. The results indicate that the tested extract has significant antioxidant activity and can be a source of natural antioxidants.Cilj rada je bio da se ispita potencijalna antioksidativna aktivnost metanolskog ekstrakta lista biljke Saxifraga rotundifolia L. u zavisnosti od ukupne količine fenola, flavonoida i flavonola. Ispitivani ekstrakt pokazao je visok sadržaj fenola (324,39 mg GA/g) i manje količine flavonoida (36,81 mg RU/g) i flavonola (11,52 mg RU/g). Antioksidativna aktivnost određena je serijom in vitro metoda. Ispitivani ekstrakt pokazuje visok nivo ukupne antioksidativne aktivnosti (509,78 mg AA/g), kao i visok stepen АBTS+. i DPPH ,,skevindžer“ aktivnosti sa IC50 vrednošću od 48,76 μg/mL za ABTS+. i 30,39 μg/mL za DPPH metodu. Dobijeni rezultati ukazuju da ispitivani ekstrakt poseduje značajnu antioksidativnu aktivnost i može biti izvor prirodnih antioksidanata