Mankiw–Romer–Weil model application to the world SARS COVID-19 pandemic airworthiness support business prospective evaluation

N. Gregory Mankiw, David Romer, and David Weil proposed and developed the Solow–Swan model. The initial model was created by Robert Solow and Trevor Swan in 1956. The cornerstone of the theory was a production function of the Cobb–Douglas type The Solow–Swan model is with the production function of Cobb–Douglas type. The essential element of the models is the economic sectors portions being found from the proportions. Recursive model with the preferences entropy is a variant of the model adjusted to the formulations of the problems with the considerations of the splitting of the outputs according to the optimal preferences distributions with respect to the preferences uncertainties degree measures (entropies) conditional maximizations. The theory of subjective analysis happened to be rather useful and helpful for creation and development of the flurry of many applicable problems based upon the entropy paradigm.Application of the modified Mankiw–Romer–Weil macroeconomics model with the production function is of Cobb–Douglas type is proposed as an attempt for the prospective evaluation, on the example of the airworthiness support business. The assessments are even more actual for the hard pandemic period of SARS COVID-19. The important economic sectors coefficients are modeled as preferences functions of the entropy paradigm. The paper was prepared as a report to the regular every second year International Conference (the Fifteenth International Scientific Conference “AVIA-2021”, which was held at the National Aviation University on April 20-22, 2021). The presented version of the theoretical developments contains main ideas. Some illustrative example simulated with the help of the explained specific recursive procedure is show. A couple of necessary diagrams as a result of the calculation experimentation are plotted

Pre-diploma practices: self-study method guide. Part I

This method guide on the self-study is contemplated in response to the needs of our students in more detailed elaborations concerning the practical training tasks stated, set, or given for the students’ independent work, possibly used in their further graduation papers, or even Ph.D. studies. The whole material is split into portions. Each portion is intended to cover a fraction of the probable applications aimed at the aircraft technical operation in regards with the aeronautical engineering maintenance in aviation business.The method guide contains a few recommendations on the self-study in regards with the application of the knowledge acquired at the Practical Training “Pre-Diploma Practices” carrying out, which is indispensable to complete the works of the individual task, get ready for passing the final kinds of control. Designed for the 2nd year students of the Field of Study 27 “Transport”, Specialty 272 “Aviation Transport”, Specialization 01 “Maintenance and Repair of Aircraft and Aircraft Engines”

Ocean heat transport simulation model based upon the doctrine of the conditional optimization of the hybrid functions entropy

Within the presented paper, it is proposed an entropy model that takes into account the uncertainty of a special kind. The entropy paradigm approach used herein is based upon physical applications [2] adopted to the active systems theory of subjective analysis [3, 4, 126, 138, 179, 184]. The developments of [2-4, 126, 138, 179, 184] imply the models constructions with both the traditional view entropy of the Shannon’s type and hybridization endeavors doctrine [5-215] like discussed in [171]. Now, the interpretation of the oceanic heat transport distribution options could be as follows: 1. First option deals with the cumulative function of the oceanic heat transport distribution with respect to Latitude; and the corresponding effectiveness function for the objective functional (3) is expressed with that cumulative function. Shown in Fig. 2. 2. Second option has the effectiveness function of the ratio, portrayed in Fig. 3, which relates with the elasticity of the first option.The important aspect of the ocean heat transport is considered as being the one of the crucial for the ecological and social-economical steady development in conditions of the contemporary climate change. Theoretical model is developed in the framework of the specific hybrid functions entropy conditional optimization doctrine. The conducted simulation with the first derivative of the obtained extremal for the parameter (free) function gave a result close to the presented in the background literature. The derivative, therefore, could be interpreted for the presented investigations as the ocean heat transport with respect to the latitude. Necessary diagrams are plotted. Numerical acceptable data are adjusted to highlight the plausibility of the proposed approach. As a whole, the attempt opens the possibilities for a more elaborate research

Transport Vehicles Operation. Part I:Number of Transport Vehicles

This method guide on the self-study (SS) is contemplated in response to the needs of our students in more detailed elaborations concerning problems stated, set or given for the students’ independent work on this subject for the specified calculation and graphic work (CGW), possibly used in their term papering (TP), course projecting (CP), further graduation papers or even PH.D. studies. The whole material is split into portions. Each portion is intended to cover a fraction of probable applications aimed at transport vehicles operation or their adjacent problems.The method guide contains a few recommendations on the Self-Study in regards with the completion of the calculation and graphic work on the academic subject of “Transport vehicles operation”, in part I, concerning the section of “Number of transport vehicles” at solving the dilemma of optimal choice. Designed for the 2nd year students of the field of study 27 “Transport”, specialty 275 “Transport technologies”

Aerohydrogasdynamics and Flight Dynamics. Part II. A : Flight Dynamics

This method guide on the self-study (SS) is contemplated in response to the needs of our students in more detailed elaborations concerning problems stated, set or given for the students’ independent work on this subject for the specified calculation and graphic work (CGW), possibly used in their term papering (TP), course projecting (CP), further graduation papers or even Ph.D. studies. The whole material is split into portions. Each portion is intended to cover a fraction of probable applications aimed at aero-hydro-gas-dynamics and flight dynamics or their adjacent problems. Specificaly, this part is: self-study method guide, part II. A, "Flight dynamics. Trajectory problems. A".The method guide contains a few recommendations on the self-study in regards with the completion of the calculation and graphic work on the academic subject of “Aerohydrogasdynamics and flight dynamics”, in part II. A, concerning the section of “Flight dynamics” at solving the aircraft trajectory problems. Designed for the 3rd year students of the field of study 27 “Transport”, specialty 272 “Aviation Transport”

Sensors, measurement fusion and missile trajectory optimisation

When considering advances in “smart” weapons it is clear that air-launched systems have adopted an integrated approach to meet rigorous requirements, whereas air-defence systems have not. The demands on sensors, state observation, missile guidance, and simulation for air-defence is the subject of this research. Historical reviews for each topic, justification of favoured techniques and algorithms are provided, using a nomenclature developed to unify these disciplines. Sensors selected for their enduring impact on future systems are described and simulation models provided. Complex internal systems are reduced to simpler models capable of replicating dominant features, particularly those that adversely effect state observers. Of the state observer architectures considered, a distributed system comprising ground based target and own-missile tracking, data up-link, and on-board missile measurement and track fusion is the natural choice for air-defence. An IMM is used to process radar measurements, combining the estimates from filters with different target dynamics. The remote missile state observer combines up-linked target tracks and missile plots with IMU and seeker data to provide optimal guidance information. The performance of traditional PN and CLOS missile guidance is the basis against which on-line trajectory optimisation is judged. Enhanced guidance laws are presented that demand more from the state observers, stressing the importance of time-to-go and transport delays in strap-down systems employing staring array technology. Algorithms for solving the guidance twopoint boundary value problems created from the missile state observer output using gradient projection in function space are presented. A simulation integrating these aspects was developed whose infrastructure, capable of supporting any dynamical model, is described in the air-defence context. MBDA have extended this work creating the Aircraft and Missile Integration Simulation (AMIS) for integrating different launchers and missiles. The maturity of the AMIS makes it a tool for developing pre-launch algorithms for modern air-launched missiles from modern military aircraft.EThOS - Electronic Theses Online ServiceGBUnited Kingdo

Аэрогидрогазодинамика и динамика полета. Часть I : Аэрогидрогазодинамика

Методические рекомендации разработаны в ответ на запрос наших студентов в более систематизированном и упорядоченном изложении основ расчета и построения поляр самолета на русском языке. Данные методические рекомендации предназначены для выполнения расчетно-графической работы (РГР), хотя отчасти могут быть использованы при выполнении курсовых работ (КР) и при курсовом проектировании (КП). Материал структурирован в частях, разделах и параграфах.Методические рекомендации содержат ряд указаний для самоподготовки при выполнении расчетно-графической работы по академической дисциплине «Аэрогидрогазодинамика и динамика полета», в части I, касающейся раздела «Аэрогидрогазодинамика» при построении поляры самолета. Рассчитаны на студентов 3-го курса направления подготовки 27 «Транспорт», специальности «Авиационный транспорт»

Aerohydrogasdynamics and Flight Dynamics. Part II. A : Flight Dynamics

This method guide on the self-study (SS) is contemplated in response to the needs of our students in more detailed elaborations concerning problems stated, set or given for the students’ independent work on this subject for the specified calculation and graphic work (CGW), possibly used in their term papering (TP), course projecting (CP), further graduation papers or even Ph.D. studies. The whole material is split into portions. Each portion is intended to cover a fraction of probable applications aimed at aero-hydro-gas-dynamics and flight dynamics or their adjacent problems. Specificaly, this part is: self-study method guide, part II. A, "Flight dynamics. Trajectory problems. A".The method guide contains a few recommendations on the self-study in regards with the completion of the calculation and graphic work on the academic subject of “Aerohydrogasdynamics and flight dynamics”, in part II. A, concerning the section of “Flight dynamics” at solving the aircraft trajectory problems. Designed for the 3rd year students of the field of study 27 “Transport”, specialty 272 “Aviation Transport”

New concepts in automation and robotic technology for surface engineering

Nowadays, the use of robots for the automation of process is very common. This is due to the advantages provided: cost reduction, quality increase, high reproducibility, etc. Nevertheless the robots have the disadvantage, that a high initial investment is necessary. Thermal spraying processes use industrial robots for many reasons, some of them are: high control of the process, quality increase, dangerous work environment, etc. The industrial robot can control many parameters during the process; like the trajectory and the velocity of the torch, which have a significant influence on the heat and mass transfer to the piece and coating. Properties such as coating thickness, porosity, micro hardness and thermal stress distribution are therefore significantly influenced by the spraying distance, velocity and trajectory. It is thus necessary to implement new tools, which support robot programming and fulfill the requirements of torch handling for thermal spraying and lacquered operation. Optimized robot programming is necessary for high quality products regarding coating properties and functionality. To optimize the robot programming, different off-line programming tools are used. The off-line programming has the advantages: increase of work safety and efficiency, low time to program, continuous production, etc.Escuela Técnica Superior de Ingeniería IndustrialUniversidad Politécnica de CartagenaInstitute for Manufacturing Technologies of Ceramic Components and Composites (IMTCCC; University of Stuttgart

A relative moment tensor inversion technique applied to seismicity induced by mining

Three hybrid moment tensor inversion methods were developed for seismic sources originating from a small source region. These techniques attempt to compensate for various types of systematic error (or noise) that influence seismograms recorded in the underground environment in order to achieve an accurate and robust measure of the seismic moment tensor. The term 'hybrid' was used to distinguish between the relative method proposed by Dahm (1995) and the methods developed in this thesis. The hybrid methods were essentially weighting schemes designed to enhance the accuracy of the computed moment tensors by decreasing the influence of any low quality observations, to damp (or amplify) any signals that have been overestimated (or underestimated) due to local site effects, and to correct for raypath focussing or defocussing that results from inhomogeneities in the rockmass. The weighting or correction applied to a particular observation was derived from the residuals determined when observed data were compared with corresponding theoretical data (for a particular geophone site, sensor orientation and wave phase) and were calculated using a cluster of events rather than a single event. The first and second weighting schemes were indirectly related to the mean and the median of the residuals where the residuals were defined as the ratio of the theoretical to observed data. In the third scheme, the residuals were defined as the difference between the observed and theoretical data and the weights were based on the distance of a data point (measured in standard deviations) from the mean residual. In each of the weighting schemes, the correction was applied iteratively until the standard error of the least-squares solution (normalised to the scalar seismic moment) was a minimum. The schemes were non-linear because new weights were calculated for each iteration. A number of stability tests using synthetic data were carried out to quantify the source resolving capabilities of the hybrid methods under various extreme conditions. The synthetic events were pure double-couple sources having identical fault-plane orientations, and differing only in rake. This similarity in the mechanisms was chosen because the waveforms of tightly grouped events recorded underground often show high degrees of similarity. For each test, the results computed using the three hybrid methods were compared with one another and with those computed using the single event, absolute method and two relative methods (with and without a reference mechanism). In the noise-free situation, it was found that the relative method without reference mechanism showed the highest resolution of mechanisms, provided that the coverage of the focal sphere was not too sparse (> 3 stations). The hybrid method using a median correction was found to be the most robust of all the methods tested in the most extreme case of poor coverage (2 stations) of the focal sphere. When increasing levels of pseudo-random noise were applied to the data, the absolute moment tensor inversion method, the hybrid method using a median correction, and the hybrid method using a weighted mean correction all showed similar robustness and stability in extreme configurations concerning network coverage of the focal sphere and noise level. When increasing levels of systematic noise were added to the data, the hybrid methods using a median correction and weighted mean correction were found to exhibit similar robustness and stability in extreme configurations concerning network coverage of the focal sphere and systematic noise. In all situations investigated, these two hybrid methods outperformed the relative and absolute methods. The hybrid moment tensor inversion methods using a median and weighted mean correction were applied to a cluster of 14 events, having remarkably similar waveforms, recorded at Oryx Gold Mine. For comparative purposes, the absolute method was also applied. The inputs to the inversion methods consisted of the spectral plateaus of both P- and S-waves at frequencies below the comer frequency of the time-integrated displacement traces. The polarities of dominant motion were used as an additional constraint and were determined from cross-correlation of observed with synthetic P- or S-waves. The solutions computed using the hybrid moment tensor inversion using a median correction displayed a distinct improvement after the iterative residual correction procedure was applied. The radiation patterns and faultplane solutions showed a high degree of similarity, and are probably more accurate reflections of reality than those computed using the absolute moment tensor inversion methods. These observations are very encouraging and point towards the method's potential for use as a standard processing tool for mine seismicity. The implications of this work are a better understanding of the focal mechanisms of seismic events induced by mining activities, ultimately leading to improved safety underground