Realization Of New Technologies Research Articles

Physics‐based modeling and predictive simulation of powder bed fusion additive manufacturing across length scales

AbstractPowder bed fusion additive manufacturing (PBFAM) of metals has the potential to enable new paradigms of product design, manufacturing and supply chains while accelerating the realization of new technologies in the medical, aerospace, and other industries. Currently, wider adoption of PBFAM is held back by difficulty in part qualification, high production costs and low production rates, as extensive process tuning, post‐processing, and inspection are required before a final part can be produced and deployed. Physics‐based modeling and predictive simulation of PBFAM offers the potential to advance fundamental understanding of physical mechanisms that initiate process instabilities and cause defects. In turn, these insights can help link process and feedstock parameters with resulting part and material properties, thereby predicting optimal processing conditions and inspiring the development of improved processing hardware, strategies and materials. This work presents recent developments of our research team in the modeling of metal PBFAM processes spanning length scales, namely mesoscale powder modeling, mesoscale melt pool modeling, macroscale thermo‐solid‐mechanical modeling and microstructure modeling. Ongoing work in experimental validation of these models is also summarized. In conclusion, we discuss the interplay of these individual submodels within an integrated overall modeling approach, along with future research directions.

Considerations on the Plastic Structure of a UAV Payload Made by 3D Printing Technology

With the development of unmanned aerial vehicle (UAV) systems for a multitude of real-time applications, 3D printing technologies have been developed to make thermoplastic structures by fusing filament Fused Deposition Modeling (FDM) or Fused Filament Fabrication (FFF). However, we consider that the realization of new technologies of experimental models / technological demonstrators / prototypes becomes profitable by using 3D printing technologies. The main aim of the paper is to highlight how the use of three types of materials, which are processed differently, influences the Von Mises stresses of the payload used for a UAV, with the mission of photographing and filming from high altitude.

INVESTMENT AND INNOVATION FACTORS IN THE MECHANICAL ENGINEERING OF THE REGIONS IN THE IMPLEMENTATION OF THE PROGRAMME OF DEVELOPMENT OF THE ARCTIC ZONE OF THE RUSSIAN FEDERATION

Purpose : development of methodical recommendations about long and medium-term forecasting of an oil and gas complex. Considering a number of inexact forecasts made in last 4–8 years and also high dependence of economy of our country on power, on an oil and gas complex – contribution of problems of forecasting and assessment of strategic alternatives of development of energy industry to national security is still underestimated and demands improvement of methodology of carrying out technical and economic researches in this area. Methods: of carrying out work: analysis of regularities of scientific and technological development of large companies as systems, analysis of normative documents, system analysis, models on basis of game theory, scenario approach, Forsythe's elements. Results: accounting of features of integrated structure of company when forecasting prospects of her technological development; modeling of results of adaptation of activity of vertically integrated oil and oil and gas companies to short-term changes of price dynamics; recommendations about improvement of methodology of creation of corporate scenarios of technological development. Conclusions and relevance : vertically integrated companiesareabrightexampleofhowmining-and-geologicalandinfrastructurerestrictions set to technological progress others, in comparison with predicted, rates of realization of new technologies and direction them evolution now. The built-in defects the of methods applied in course of Forsythe can be compensated or are even eliminated if in course of obtaining expert answers, and in processing of results of poll to apply a number of basic regularities of long-term technical and economic development and also modern developments in field of scenario approach, system analysis and game theory.

Elucidation of rapid reduction of water flow through concrete crack regarded as self-healing phenomenon

ID No : 75 ABSTRACT The development of self-healing concrete has witnessed several strides in the last three decades. Among these is the understanding of the mechanisms of self-healing concrete, as well as the realization of new technologies of enhancing crack selfhealing in concrete. Previous research suggests that crack closing mechanism occurs due to mainly 1) Hydration of anhydrous cement, 2) Formation and crystallization of Calcium Carbonate, 3) Swelling of cement matrix and 4) Sedimentation of particles in the crack interstices. In this research however, after a one by one investigation, it was found that these mechanisms do not fully explain the drastic water flow recovery that occurs in the initial stages of water permeation through cracked concrete. This preliminary finding then prompted direct visual observation of water flow through cracks’ narrow spaces. This was achieved by using acrylic resin and glass as transparent media over the concrete surface of split and machine cut cracks respectively. With this, an interesting observation was made – the creation of air bubbles (waterless spaces inside the interstices) following the condition of full water saturation. It was observed that water flow through the narrow crack openings creates air bubbles by probably various water action mechanisms. The created air bubbles narrow water flow paths in the crack, causing significant water flow reduction in the initial and later stages of water supply condition.

Cultorological Approach to Training of the Future Managers of Tourism in Precarpathia

The article deals with the «culturological approach» to the professional training of futuremanagers of tourism in Precarpathia. As the Precarpathian region attracts thousands of touristsyear-round the demand of training qualified specialists in the sphere of tourism and hospitality isconstantly growing.Nowadays the question of a successful and perspectives career in tourism results in training anew standard professional, a specialist of many-sided knowledge,with the ability to fulfil tasksconcerning thinking over, making and realizing management decisions. In order to develop touristCarpathian region, the Precarpathian National University named after V.Stefanyk educates futureexperts in such specialities as "Tourism" and "Hospitality Industry".Involving youth in social cultural values and ideals, education contributes to maintaining socialorder and by providing realization of new technologies, scientific rethinking of existing knowledgeeducation promotes social changes, society development, i.e. education operates as an agent ofmoral regulation facilitating social integration.Different interpretations of the concept «culture» were studied. The conclusion that culture is amultiaspect and multifunctional notion was made.Cultorological approach in education provides effectiveness of the process of putting culture asa social phenomenon into action. The fact of culturological direction extending of the wholeeducational process in the university interrelating to its components (common-cultural,professional and functional) is of great importance. Cultorological approach introduction to theprocess of training of the future tourism experts that is aimed at the developing of civil societyvalues and an independent creative personality is a premise of modernization of higher educationin Ukraine

Die Zukunft der operativen Gynäkologie: vom Dogma zur Wissenschaft – von der Wissenschaft zum Standard

In the future of gynecologic surgery, there will be a reduction of traditional and an increase of endoscopic surgery. Development, progress, and realization of new technologies have to be based on scientific results, as it has been shown for the surgery of early-stage ovarian cancer. Endoscopy is already part of daily routine surgery in nearly all gynecologic departments, although important questions like the optimal technique, proper indications, and the consequences of these new technologies regarding the course of ovarian cancer are still not answered. Especially gynecological surgery has to turn away from a dogmatic way of thinking to a critical science-oriented practice in the future.

Konstitution als Schlüssel zur Werkstoffentwicklung

Although being a classic discipline, phase diagram studies have lost nothing of their importance in modern materials science. On the contrary, the study of phase equilibria becomes even more important as materials development plays an increasing key role in the realization of new technologies, due to the fact that the materials systems on which such technologies are based become more complex and consist of an increasing number of components. In this paper, progress in the methodology of phase equilibria studies is discussed. Moreover, typical examples of applied phase diagram research are presented, which show how an intimate understanding of microstructural development, as well as the optimization of property values and the combination of certain material properties can be developed from the knwoledge of phase equilibria

New technology and developments in management organization

New technology can provide the means to institute considerable changes in management organization, both through its application to operations and through its direct use in managerial work. These changes are expected to lead to smaller more cohesive management structures on the basis of the advantages offered by new technology for control and integration. However, a number of organizational design choices are involved with the introduction of new technology. These may present uncertainties, and it is not expected that the changes discussed will be appropriate to all kinds of organization. In Britain, there are also particular institutional and cultural barriers to the full realization of new technology's managerial potential.