256 research outputs found

    STUDY OF SI SURFACE MODIFICATION WITH IRRADIATION, PLASMA AND ULTRASOUND FOR GAS SENSING APPLICATION

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    In order to search the new physical principles for high sensitive and selective gas sensors on the base of porous silicon creating we examined gas sensitivity of the silicon surface modified with charge particle irradiation, chemical plasma and ultrasound. Single crystal Si and SiO2/Si structures were irradiated with ions (6.8 MeV H, 27.2 MeV He, 290 MeV Ar, 372 MeV Xe, 710 MeV Bi), treated with chemical plasma with 80-100eV F-content and with ultrasound (Р=0.5 W, 8 MHz). The sample’s absorption properties were obtained from the analysis of the optical parameters changes (refraction index and absorption coefficient, and a thickness of near-surface region, too). The latest were studied by the method of multiangular monochromatic ellipsometry in test camera in ethyl alcohol, ammonia and acetone environment. Scanning electron microscope (SEM) and atomic force microscope (AFM) were used to analyze the surface morphology. Protons and alpha particles were found to lead to the Si near-surface layer destruction of and an enhancement of the surface roughness. The proton irradiated samples revealed a higher sensitivity to the absorption of ammonia and acetone molecules. Plasma treated Si displays surface modification (loosening of near-surface layer), though, gas absorption is not clearly revealed. Optical properties of Si/SiO2 structures depend on the dimensions and the depths of nanopores, created by the etching of latent tracks in dioxide after irradiation. The greatest optical constant changes occurred in irradiated with 209Ві structures, where tracks penetrated the whole dioxide. Accordingly bismuth-irradiated structures have the best gas sensitivity. Ultrasound influences on the optical parameters of porous Si/SiO2 structure (loosening of the near-surface layer). However, these changes are unstable; and optical characteristics relax to the initial value in time. The best result was obtained for SnO2 /SiO2 /Si structure, where nanopores etched in the Xe latent tracks areas, were filled with SnO2

    The influence of amino acids on the activity of antioxidant enzimes, malonic dialdehyde content and productivity of garlic (Allium Sativum L.)

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    The research was carried out in 2017–2019 in the conditions of the Right-Bank Forest Steppe of Ukraine. The results of study, the effect of spraying by certain amino acids; salicylic(300 ppm), gibberellin (150 ppm) and ascorbic acids (200 ppm) on garlic (Allium sativum L.) plants are presented in the article. It was found that amino acid solutions improves the antioxidant state: the activities of SOD, CAT, POD, GR, GST in treated leaves tended to increase, the activity of SOD was higher than the control of 7.5–15.0%; CAT (27.4–45.9%); POD (7.0–83.0%); GR (5.4–49.9%); and GST (14.8–41.3%). It was noted that the content of chlorophyll a+b in the leaves significantly increased (2.6–10.8%), The use of amino acids increased the accumulation of dry matter by 1.4–4.0%. The yield increase was 1.14–2.27 t ha-1 (7.7–15.3% compared to control). The content of B vitamins in the garlic cloves was greatly influenced by gibberellic acid, where increasing the amount of B vitamins reached to 21.9% relative to control The use of salicylic and ascorbic acids increased the amount of B vitamins by 7.6 and 8.2%, respectively. The most significant increasing of C vitamin content was observed by spraying of plants with ascorbic acid (+12.5%), whereas by spraying with salicylic and gibberellic acids its content increased by 6.0 and 7.5%, respectively. In the future, the data obtained can be used to reduce the impact of abiotic factors on the physiological state and productivity of garlic plants. Also, the obtained data will serve as a theoretical basis for producers in view of the purposes for which the products are grown (for sale in fresh form, processing or storage)

    Analysis of the Current State of and Trends in the Development of the Hotel Industry in Regions of Ukraine

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    An analysis of the current state of the hotel industry in regions of Ukraine is carried out, and trends in its development are revealed. It is noted that marketing tools for attracting tourists are underdeveloped in all regions of Ukraine, the information about many types of services in the hotel industry is either insufficient or absent mainly due to the very limited range of services. It is established that the occupancy of hotels in most regions of Ukraine is seasonal (in areas that do not belong to the most popular tourist zones, it is the lowest in summer; while in resort areas, it is the highest in summer and winter). Moreover, as a rule, the occupancy during the year is even more uneven by the days of the week – it decreases on weekends, increasing on weekdays due to people who are on a business trip. It is established that the general trend, identified as a result of the studies carried out for all regions of Ukraine, is to determine the need for innovation and new partnership relations, in particular, among travel agencies and hospitality enterprises, authorities and state self-government bodies, for an effective development of regional infrastructures. This, first of all, should be realized through cooperation mechanisms involving various sources of financing. As a result of the analysis of the current state of and trends in the development of the hotel industry in regions of Ukraine, it is concluded that in recent years the structure and development strategy of enterprises in the hotel industry have changed significantly. Today, it is necessary to improve the quality of services with simultaneous expanding their range, which is justified by the ever-growing demand of consumers due to the requirements of advanced technologies. A significant expansion of the range of accommodation facilities (apartments, villas, holiday homes, country and guest houses, chalets, etc.) will help to better satisfy the demand of various groups of tourists and diversify types of recreation

    Features of Innovative Corporate Culture in Organization Management

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    The features of innovative corporate culture in organization management are determined. The structure of innovation paradigm of corporate culture in the context of organization management, including structural, humanistic, ideological, symbolic, communicative, and information paradigms, is given. It is clarified that information culture of an organization has a great influence on its management, since adopting a management decision requires a prompt processing of significant arrays of information; the competence of a manager depends not so much on the experience gained in the past but on the possession of a sufficient amount of relevant information on a particular situation and the ability to make useful conclusions. The factors influencing the formation of corporate culture are determined. It is concluded that the formation of a new innovative paradigm of corporate culture of organization management, which has an informational nature, can become a composite element of management. It can be based on knowledge about the information environment, laws of its functioning, the ability to navigate information flows

    Зміна повідомлення про підозру

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    Кондратенко, В. О. Зміна повідомлення про підозру / Валерія Олександрівна Кондратенко // Шляхи удосконалення досудового розслідування: організаційно-правові аспекти : матеріали наук.-практ. круглого столу (м. Харків, 24 жовт. 2019 р.) / МВС України ; Харків. нац. ун-т внутр. справ, Фак. № 1 (з підготовки слідчих), Каф. кримінал. процесу та організації досуд. слідства. - Харків, 2019. - С. 94-96.Зазначено, що повідомлення про підозру в структурі досудового розслідування займає особливе місце, оскільки підводить підсумок у кримінальному провадженні щодо зібраних доказів, визначає подальше його спрямування.It is noted that the report on suspicion in the structure of the pre-trial investigation occupies a special place, as it summarizes the criminal proceedings on the collected evidence, determines its further direction.Отмечено, что сообщение о подозрении в структуре досудебного расследования занимает особое место, поскольку подводит итог в уголовном производстве по собранным доказательствам, определяет дальнейшее его направление

    Morphophysiological peculiarities of productivity formation in columnar apple varieties

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    Received: December 30th, 2021 ; Accepted: February 22nd, 2022 ; Published: March 4th, 2022 ; Correspondence: [email protected] of generative buds is one of the most important biological processes of plant transition from vegetative to generative state. This process is key to the problem of creating regular fruit-bearing and early-fruiting plantations. The article provides information on the organogenesis of buds in plants of columnar apple varieties in the Forest-Steppe of Ukraine, which allows establishing the features of this process in complex fruit formations of different ages, and the levels of their productivity and longevity. Research to study the organogenesis of different-age fruit formations of columnar apple varieties was conducted in the northern part of the Forest-Steppe of Ukraine during 2016–2020. The efficiency of realization the plants biological potential of all studied columnar apple varieties at III–IV and V–IX stages of organogenesis was high: the largest number of buds from their total number differentiated into generative on trees varieties ‘Sparta’, ‘President’, ‘Bilosnizhka’, ‘Valuta’ and ‘Tantsivnytsia’ (37–51%), the smallest in ‘Favoryt’ and ‘Bolero’. The biggest number of flowers per one potentially generative bud was formed by plants of ‘Tantsivnytsia’ and ‘Bilosnizhka’ varieties. The lowest level of ovarian loss during the X stage of organogenesis was observed on plants of ‘Valuta’, ‘President’, and ‘Tantsivnytsia’ varieties (41–49%), and the highest - in ‘Favoryt’ variety (up to 83%). More effective realization of potential productivity at the XI stage of organogenesis occurred in plants of ‘President’, ‘Valuta’ and ‘Tantsivnytsia’ varieties; their trees on one potentially generative bud formed - 0.27–0.38 fruits. The coefficient of determination indicates that the influence of meteorological conditions of the year on the passage of III–IV stages of organogenesis is 46%; V–IX stages - 42%; Stage X - 17%; Stage XI - 24%

    Polymethine Dye as Sensors of NH 3

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    We have investigated the properties of polymethine dyes (PMD) and the purpose of using them as sensors of hazardous gases presence. Research indicates that in case of utilizing PMD as a sensor of hazardous gases we need to use the monochromatic light which wavelength corresponds to the inflection point of the long-wave absorption edge of PMD. Such sensor of hazardous gases can detect changes in the optical density of the sensor layer or the light intensity transmitted through the layer

    Method of individual forecasting of sow reproductive performance on the basis of a non-linear canonical model of a random sequence

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    Improvement of sow reproductive performance is a key factor determining the efficiency of the pig production cycle and profitability of pork production. This article presents the solution of an important scientific and practical problem of individual forecasting of sow reproduction . The population used for the present study is from a pig farm managed by the Limited Liability Company (LLC) ‘Tavriys’kisvyni’ located in Skadovsky district (Kherson region, Ukraine). The experimental materials used for this study consisted of 100 inds. of productive parent sows of the Large White breed.The litter size traits – the total number of piglets born (TNB), number of piglets born alive (NBA) and number of weaned piglets (NW) – were monitored in the first eight parities over an eleven year period (2007–2017). The method of the forecasting of sow litter size is developed based on the non-linear canonical model of the random sequence of a litter size change. The proposed method allows us to take maximum account of stochastic peculiarities of sow reproductive performance and does not impose any restrictions on the random sequence of a litter size change (linearity, stationarity, Markov property, monotony, etc.). The block diagram of the algorithm presented in this work reflects the peculiarities of calculation of the parameters of a predictive model. The expression for the calculation of an extrapolation error allows us to estimate the necessary volume of a priori and a posteriori information for achieving the required quality of solving the forecasting problem. The results of the numerical experiment confirmed the high accuracy of the proposed method of forecasting of sow reproduction. The method offered by us almost doubles the accuracy of forecasting of sow litter size compared to the use of the Wiener and Kalman methods. Thus, average forecast error decreases across the range of features TNB (1.71), NBA (1.68) and NW (1.25 piglets). Apparently, this may reflect a higher level of manifestation of the genetically determined level of individual sow fertility at the moment of piglet weaning. The higher adequacy of the developed mathematical model with regard to NW can be also due to the fact that the relations between sow litter size in different farrowings primarily have a non-linear character, which is taken into maximum account in our offered model. Given non-linearity, on the other hand, turns out to be a significant factor determining a lower estimation of the repeatability value for NW compared to the estimations for TNB and NBA. The use of the developed method will help to improve the efficiency of pig farming

    Efficiency of productivity potential realization of different-age sites of a trunk of grades of columnar type apple-trees

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    Received: April 15th, 2022 ; Accepted: May 15th, 2022 ; Published: May 17th, 2022 ; Correspondence: [email protected] article provides information about buds organogenesis in plants of columnar apple cultivars in the Forest-Steppe of Ukraine (Kyiv), which allows to establish the features of this process in complex fruit formations of different ages, and their productivity and longevity. We recommend studying of apple trees productivity in the process of its formation by analyzing of rudimentary organs formation and their consistent development into vegetative and generative organs, which are elements of productivity. Studies of organogenesis different-age fruit formations of columnar apple cultivars were conducted in the northern part of the Forest-Steppe of Ukraine during 2016–2020. It was established that separate age sections of columnar apple trees trunk formed different initial productivity potential. In plants of all studied varieties and age groups, the laying of generative buds, the implementation of reproductive elements in V–IX and X–XI stages of organogenesis were more effective in older age areas of the trunk. Complex fruit formations, regardless of the trunk age where they are placed, form a high potential for productivity, which is effectively realized. The dependence of the formation and productivity potential realization on the stages of organogenesis and meteorological factors is established
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