MODERN DREAMS. PLANNING FIREPLACES

An analysis of the current pace of development of hypersonic technologies for the means of launching spacecraft into Earth orbit, as well as for unmanned weapons systems, which embody both impact properties and reconnaissance functions. In order to better understand the strategic importance of technologies based on direct-flow jet engines, fragmentary coverage of the impressive path of achievements of aerospace technology, given some of the highlights of the history of its formation. The presented article analyzes the current problem - increasing the reliability, reliability and accuracy of the definition and classification of moving targets by autonomous means of aircraft on combat duty. The results of the research cover the features of the starting positions and functional action on the combat duty of aircraft of different classes and bases and are able to serve as a reliable scientific basis for improving military equipment on hypersonic technologies

Features of phase transformations in powder steels upon heating

At present, powder materials are used in practically all branches of industry, from medicine to aerospace technology. This is a wide range of materials ranging from constructional and instrumental materials and ending with special-purpose materials and medical implants. Powder metallurgy methods are most often used where the manufacture of products with desired properties is impossible using traditional methods: casting, stamping, etc. Heat treatment is understood as a set of operations of heating, holding at high temperatures and cooling in order to change the structure and workability of the material, improve the combination of its mechanical and physical properties without changing the shape and size of products. Heat treatment is an effective method for improving the physical and mechanical properties and wear resistance of steel. The specific features of sintered steels (porosity, structural heterogeneity, high oxidizability, etc.) make it difficult to use the technological modes of heat treatment developed for cast steels, although the main regularities of the processes occurring during heating and cooling of compact steel can be transferred to sintered materials. Heat treatment of powder steels has a number of features, primarily due to residual porosity, as well as chemical and structural heterogeneity.

Influence of alloying components on diffusion and bonding processes in powder materials

At present, powder materials are used in practically all branches of industry, from medicine to aerospace technology. This is a wide range of materials ranging from constructional and instrumental materials and ending with special-purpose materials and medical implants. Powder metallurgy methods are most often used where the manufacture of products with desired properties is impossible using traditional methods: casting, stamping, etc. The production of all these materials is based on such basic operations as: obtaining starting materials, molding from these materials blanks of a given shape, size and strength, and sintering, intended for the final formation of the required properties and dimensions. The peculiarity of powder metallurgy technology allows creating a huge variety of developed technological schemes, which puts these technologies to a new level and allows for the rapid development of many industries. Alloying powder steels, in contrast to cast steels, has a number of characteristic features due to the specificity of their production. The structure of powder alloy steels and their properties depend on the methods of obtaining steels and technological features of their production. The following main methods of obtaining powder alloyed steels can be named: preparation of multicomponent mixtures of powders of iron and alloying elements and their subsequent processing; the use of alloyed iron powders, to which, if necessary, add carbon or other alloying elements; impregnation with liquid alloying metals or diffusion saturation of frameworks sintered from iron powders.

Netiquette concept at the assessment of college student social competence with TOPSIS method

Social competence of students college is important during the process of implementing the practicum, from social competence we can find out capable the students are in several ways such as the ability to collaborate, speak in forums, reduce social conflicts in the environment, make a network and much more. In this study, it provides a model solution for assessing social competence in students college when carrying out practicum. The purpose of the study was to develop an assessment model by measuring students' social competence during the implementation of the practicum. The number of correspondents in the study was 78 students taken from the number of practicum students in Aerospace Engineering. The data analysis technique uses the TOPSIS method, where the results of this study will obtain the best ranking of 78 KP students who have the highest social competence value. The model of the assessment can be used by lecturers of the Aerospace Engineering, Adisutjipto Aerospace Technology Institute during the practicum process or after. With this assessment model, the advantages of the Adisutjipto Aerospace Technology Institute can synergize in creating graduates with a global and humanistic character.

Air and Space Law Education: Preparing for the Future in China, Indonesia, Italy and Thailand

Aerospace technology has developed rapidly within the last decade. Facing the future, there is an urgency to balance aerospace technology developments with providing sufficient human resources through education, in this context from the perspective of air and space law. From east to west, this article elaborates on air and space law education in four countries with different experiences in aerospace activities, namely China, Thailand, Indonesia, and Italy. The development of higher education in conducting such programs is essential to ensure that the national aerospace industry will never lack proper human resources from its own nationals, including professionals with specific air and space law expertise. Furthermore, higher education has a significant role in bridging the industry with recent developments and advising the government in setting up aviation and space policies, as in the successful case of China and Italy. In the end, this article provides policy recommendations on promoting air and space law in higher education.

Complex q -Rung Orthopair Fuzzy N -Soft Sets: A New Model with Applications

This research article expands the formal representation of human thinking to a most generalized hybrid theory, namely, complex q -rung orthopair fuzzy N -soft set. It is able to capture a great deal of graded imprecision and vagueness, which so often appear together in human interpretations. This model renders a parameterized mathematical tool for the ranking-based fuzzy modeling of two-dimensional paradoxical data. To that purpose, the proposed theory integrates complex q -rung orthopair fuzzy sets with the parametric structure of N -soft sets. The framework that arises captures information beyond the confined space of complex intuitionistic fuzzy N -soft sets and complex Pythagorean fuzzy N -soft sets, with the assistance of a parameter q . We establish the basic set-theoretical operations of this model and prove some of its fundamental properties. The Einstein and other elementary algebraic operations on complex q -rung orthopair fuzzy N -soft values shall be introduced to broaden the mathematical toolbox of this field. Its relationships with contemporary approaches shall demonstrate its outstanding flexibility. Moreover, we establish two competent multicriteria decision-making algorithms that capture the nuances of periodical inconsistent data. Their feasibility shall be demonstrated with an explicit application to the selection of optimum aerospace technology required for the economic development of the Mexican space agency. A comparative analysis of both strategies with the prevailing techniques substantiates their rationality. In addition, we illustrate this comparative study with an explicative bar chart that shows the compatibility of their outcomes. Finally, we examine the functionality of the proposed model and compare it with alternative theories.

Reinforced thermoplastic fasteners

Обоснована актуальность применения армированных термопластов для изготовления крепежа для аэрокосмической техники. Разработана технология получения крепежа для соединения трехслойных панелей из угленаполненного (40%) полиэфирэфиркетона импортного и отечественного производства. Проведены исследования полученного крепежа. Полученные результаты применены в разработке технологии изготовления крепежа для несущих ферменных конструкций поддерживающих кабельную разводку на космических аппаратах. Средняя удельная прочность крепежа на разрыв составляет 115 МПа·см/г, что определяет перспективность применения его в конструкциях аэрокосмической техники. На крепеж получены Технические условия «Детали крепежные армированные». The relevance of the use of reinforced thermoplastics for the manufacture of fasteners for aerospace equipment is substantiated. A technology has been developed for obtaining fasteners for joining three-layer panels made of carbon-filled (40%) polyetheretherketone of foreign and domestic production. The research of the received fasteners has been carried out. The results obtained are used in the development of a technology for the manufacture of fasteners for load-bearing truss structures that support cabling on spacecraft. The average specific tensile strength of the fastener is 115 MPa cm/g, which determines the prospects of its application in the structures of aerospace technology. The technical conditions «Reinforced fastening parts» were received for the fasteners.

Effects of simulated prolonged restrained sitting on physical and physiological states

Introduction: Advancement in aerospace technology, and resultant change in operational capabilities has posed unique challenges on the aircrew, who is required to operate for prolonged periods seated and restrained. Examination of the effects of prolonged restrained sitting on physical and physiological states was the desired objective of the study. Material and Methods: Longitudinal evaluation of subjective appreciation of physical discomfort and pain, and physiological parameters, namely, heart rate (HR), blood pressure (BP), oxygen saturation (SpO2), skin temperature, and calf girth changes across 6-h of simulated prolonged restrained sitting was undertaken among 15 healthy male non aircrew volunteers with mean age of 31.2 ± 3.63 years. Subjective discomfort was assessed by Category Partitioning Scale (CPS) and pain by Short-Form McGill Pain Questionnaire (SF-MPQ). Results: Prolonged restraint sitting of 6-h resulted in a significant increase in calf girth. Significant changes were also observed in CPS and SF-MPQ scores indicating an increase perception of discomfort and pain. Changes in HR, MAP, SpO2, and lower limb skin temperature were also observed even though these changes were lower in magnitude. Conclusion: The pain and discomfort following 6-h of prolonged restraint sitting were found to be appreciable by the subjects. This, along with a significant change in the calf circumference and other physiological parameters were possibly due to effects of venous pooling as a result of sitting for prolonged periods. The effects so observed could have potential flight safety implications and affect mission effectiveness. However, these findings need to be examined in actual cockpit conditions where the seat is more ergonomically designed; yet the aircrew is subjected to a wide spectrum of additional aeromedical stressors.