Mullite Whiskers and Mullite-whisker Felt

The Naval Surface Warfare Center has developed processes for the preparation of mullite (3(Al2O3)(dot)2(SiO2)) whiskers and mullite-whisker felt. Three patents on the technology were issued in 1990. The processes are based on chemical reactions between AlF3, Al2O3, and SiO2. The felt is formed in-situ during the processing of shaped powdered precursors. It consists of randomly oriented whiskers which are mutually intergrown forming a rigid structure. The microstructure and properties of the felt and size of the whiskers can be modified by varying the amount of Al2O3 in the starting mixture. Loose mullite whiskers can be used as a reinforcement for polymer-, metal-, and ceramic-matrix composites. The felt can be used as preforms for fabricating composite materials as well as for thermal insulation and high temperature, chemically stable filters for liquids (melts) and gases

Path integral representation of the evolution operator for the Dirac equation

A path integral representation of the evolution operator for the four-dimensional Dirac equation is proposed. A quadratic form of the canonical momenta regularizes the original representation of the path integral in the electron phase space. This regularization allows to obtain a representation of the path integral over trajectories in the configuration space, i.e. in the Minkowsky space. This form of the path integral is useful for the formulation of perturbation theory in an external electromagnetic field.Comment: 3 page

Determination of Technological Parameters and Indicators of the Quality of New Herbal Collection

Rheumatic diseases include more than 1000 nosological forms, among which the highest incidence is osteoarthritis, rheumatoid arthritis and osteoporosis. The predominantly advanced age, the presence of comorbid diseases, the duration of the course of the disease and the need for concomitant treatment complicate the conduct of anti-inflammatory and analgesic therapy in such patients. Herbal medicines, in particular in the form of doses, due to the mildness of the action and the absence of significant side effects, can be used in the complex therapy of the acute period of rheumatic diseases, as well as for the prevention of relapse.The aim of the presented work was to develop the composition, technology and determination of the quality indices of herbal collection, which reveals analgesic and anti-inflammatory properties and can be used for the prophylaxis and auxiliary therapy of a number of conditions in rheumatology.Materials and methods. In the course of research, the methods used in the State Pharmacopoeia of Ukraine 2.0 (SPHU) were used.Results. As a result of the analysis of literary data and our own experimental studies on the chemical composition and pharmacological activity of certain types of medicinal plant material, we have developed herbal collection that is recommended for the treatment and prevention of rheumatic diseases of the joints. Studies have been conducted on the development of quality collection indicators, which guarantee the effectiveness, safety, reproducibility of the imposed collection. The basic technological parameters of the raw material are determined: specific, bulk and volume mass, porosity, degree, degree of shredding. In order to prevent uneven mixing, an optimal degree of grinding of the raw material of the investigated collection, which ranges from 0.20 mm to 0.35 mm, is established, which allows obtaining a homogeneous mixture and contributes to the maximum yield of extractive and active substances. A series of experimental works aimed at studying the influence of the method of infusion (for 15, 30, 45, 60 minutes and until complete cooling) on the quality of the collected water extracts from the collection was conducted. The optimal method for setting the collection for 60 minutes is the best, since the content of extractives and flavonoids in the aqueous extract was highest and amounted to 49.57±0.52 % and 0.52±0.03 % respectively.Conclusions. The composition of the herbal drug was developed: Harpagophyti radiх, Sophoraе alabastra, Valvae fructus Phaseoli vulgaris, Polygoni avicularis herba with the following ratio of components 50: 20: 20:10. The technological parameters of the raw material are studied: specific, volumetric and bulk mass, porosity, singularity of raw materials. The optimum degree of shredding of raw material is established, which helps to maximally remove biologically active substances and extractives. Experimental way is determined the optimal mode of collection, which can be recommended to the consumer to obtain the maximum therapeutic effect

Main Tendencies of the Nut Market Development in Ukraine and Throughout the World Основные тенденции развития рынка орехов в Украине и мире

The author has determined the peculiarities of functioning and main problems of the nut inland market development, its type and aspect structure, the place of Ukraine in the world’s production and trade with nuts, the tendencies in the formation of price of their varieties as regards different countries as well as the development of nursery practice and establishment of orchards. The processes in the nut world’s market situation formation and current changes have been considered and the purpose fullness of legislative regulating the state support of the industrial nut-growing development proved.Определены особенности функционирования и основные проблемы развития отечественного рынка орехов, его тип, видовая структура и строение. Установлено место Украины в мировом производстве и торговле орехами, тенденции ценообразования на их разновидности в разрезе стран, а также в развитии питомников и закладке насаждений. Рассмотрены процессы формирования и текущие изменения конъюнктуры на мировом рынке орехов. Доказана целесообразность законодательного урегулирования государственной поддержки развития промышленного ореховодства

SCALED APPROACH TO OPEN SOURCING DEPARTMENT OF THE NAVY PRODUCED SOFTWARE

The Department of Defense (DoD) must continue to develop, sustain, and update its software-based capabilities. For the Department of the Navy (DoN), the life cycle costs of software continue to grow; over time, developing code will not be cost effective. An alternative to developing code is to further integrate open source software (OSS) into DoN programs. OSS is software that grants users the ability to view, use, and change the software source code. The use of OSS has been extensively researched, as addressed in the MITRE Corporation’s study on free and open source software (FOSS) in the DoD, completed in 2003. Despite favorable reports and published DoD policy, and the widespread successful use of OSS in current software, program managers are reluctant to fully integrate OSS into the DoN due to concerns with legal requirements, cybersecurity, total expenses, and the ability to implement and control OSS on classified systems while adhering to security regulations. This study utilized a quantitative, scaled approach to determine the risks and benefits to open sourcing for all DoN software. Several OSS case studies were examined. This research concluded that while OSS has been tested and proven cost-effective in certain areas of the DoN, it may not be the most efficient solution for all DoN projects. Therefore, the DoN should consider further implementation of OSS in security, software development, infrastructure support, and for program lifecycle cost reductions.DoN Secretariat Historianhttp://archive.org/details/scaledapproachto1094560404Captain, United States Marine CorpsCaptain, United States Marine CorpsApproved for public release; distribution is unlimited

Analisis Pemahaman Konsep Matematika Siswa Kelas V dalam Menyelesaikan Soal di SD Negeri Gunturan Pandak Bantul Tahun Ajaran 2016/2017

The purpose the research to describe the understanding of mathematical concepts about solid. Questions research to know Percentage re-explain concept, to know Percentage classify and give example / non example, also to know Percentage utilizing count operation. Type of research quantitative description, subject of the research is students of grade V SD Negeri Gunturan and the object is understanding of mathematical concepts. Data analysis techniques performed at problem solving were analyzed with 3 indicators of understanding of mathematical concepts 3 indicator concept understanding are re-explaining concepts, classifying and giving examples, utilizing counting operations. Result research of understanding concepts 50,91% low category. Percentage of re-explain the concept of 68.35% height. Percentage classify and give example / non example 50.80% medium category. Percentage utilizing count operation 33.59% low category

Democratization of territorial constitution : current trends and the constitutional experience of Denmark

Purpose: The paper aims to analyze the processes of decentralization of public authority in Denmark. The authors assume that the main reason for expanding territorial units' autonomy is a general trend towards democratization of unitary states, as evidenced in other European countries, such as Italy, France, Spain, the United Kingdom and Northern Ireland. Design/Methodology/Approach: For the purpose of democratization of the territorial constitution of a regional country, it seems necessary: first, to create such constitutional governance mechanisms, which would enable to account for the interest of those populations to the fullest extent; second, to formulate the principles and norms of asymmetry of the territorial structure of a regional state with different legal status of different territorial units; third, to introduce a special legal mechanism for regulation of disputes between central and local governments. Findings: Characterizing the process of democratization in the modern unitary state, the authors conclude that significant success in the area of democratization of the territorial organization of public authority is due to the principal constitutional and legislative reforms aimed at devolution and decentralization of central power and delegation of authorities to local self-government above mentioned processes. Practical Implications: The research results may be implemented into legislation in order to improve and increase the effectiveness of realization of the vertical power separation in the decentralized states where territorial units are ensured with a relatively high level of independence and autonomy. Originality/Value: The main contribution of this study is to establish an interdependence between the processes of democratization and regionalization of power in modern state, as well as to analyze the positive foreign legal experience in the amicable resolution of contradictions between central and self-governing authorities.peer-reviewe

Загальна хімічна технологія : методичні вказівки до вивчення курсу. Ч. 3

Методичний посібник містить приклад розрахунку матеріального балансу печі для випалювання колчедану. Для студентів хімічного факультету (напрям підготовки: 6.051301 – “Хімічна технологія”) денної форми навчання