Literatura científica selecionada sobre o tema "Military polygon"
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Artigos de revistas sobre o assunto "Military polygon"
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Krishnan, M., e G. Kannan. "Polygon Shaped 3G Mobile Band Antennas for High Tech Military Uniforms". Advanced Electromagnetics 5, n.º 3 (11 de novembro de 2016): 7. http://dx.doi.org/10.7716/aem.v5i3.365.
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Smart Textiles integrated with communicating components have been used in military for many applications. Wearable antenna can be attached or embedded into smart textiles which could be used for communication between combat soldiers in the battlefield. This paper presents the design of three different polygon shaped patch antenna operating on 3G Mobile Band frequency 2100 MHz embedded on three different dielectric constant materials for Military applications. The proposed polygon shaped patch antenna introduces horizontal slit in its patch to improve the antenna performance. The effect of slit length and slit width on the antenna performance is analyzed.
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Khrushchov, D., S. Chumachenko, V. Zatserkovnyi, P. Trofymenko e А. Splodytel. "CONCEPTUAL FRAMEWORK FOR INFOGEOLOGICAL MODELING OF MILITARY ACTIVITY TERRITORIES". Visnyk of Taras Shevchenko National University of Kyiv. Geology, n.º 1(96) (2022): 83–93. http://dx.doi.org/10.17721/1728-2713.96.12.
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The purpose of the study is to elaborate framework of infogeological modeling of the military activity territories (using territorial objects in Ukraine) to provide informational support of research and works on the treatment of the geological environment of territories of military activity. The main methodological instrument of informational support of research and works on the treatment of the geological environment of territories of military activity is information modeling. Given the local level of military activity territories, the complex ecological and geological model serves as the primary methodological technique. Methods developed on this paradigm's principles aim to eliminate the consequences of military activity and restore the territories of the military conflicts. Ground research was developed using conceptual models, particularly checking main components of these models that aim at determining the indetermination. To identify the influence of the military activity sources, we used the Leopold Matrix and Sorensen Level Diagram, network diagram, method of the combined analysis of maps, and factor analysis. The evaluation of the spread of factors of military and technogenic load of chemical origin in the functional zones and subzones of the military polygon was carried out based on the complex approach to the ecological evaluation of the contamination of the territories of intensive military and technogenic load using the landscape profiling and imitating modeling taking into account geochemical and hydrometeorological conditions. The analysis of the soils, contaminated with military and technogenic origin substances in the places of functional subzones locations targeted fields of military polygon showed the indicators of concentration of some of the contaminating substances exceed norms 5-20 times. Field research in military polygon showed that contamination of its territory has zonal character and is grouped around local subzones of the military object where military preparation using armaments and military equipment is carried out, being the primary source of factors of military and technogenic load of the geological environment. Prospects for further development of this field lie in developing the integral theory of infogeological modeling of geological environment of military activity territories, oriented at the evaluation of different types of influences and threats.
3
Splodytel, А. "HEAVY METALS DISTRIBUTION TRENDS ON "OLESHKIVSKI PISKY" MILITARY TRAINING SITE". Visnyk of Taras Shevchenko National University of Kyiv. Geology, n.º 2 (89) (2020): 42–48. http://dx.doi.org/10.17721/1728-2713.89.06.
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The results of ecological-geochemical researches of soil cover of "Oleshkivski pisky" military training site, using maximum allowable concentration and classification of chemical elements with respect to hazard classes are presented. Analytical works to identify gross content and heavy metals movable forms in soils were defined by methods of atomic absorption and mass-spectometry with inductively coupled plasma (ICPMS) as well as by using gamma-ray activation analysis and X-ray fluorescence analysis. Analysis and interpretation of the coefficients of heavy metal components concentration were conducted based on landscape and geochemical fundamentals. The regular network of the protoselection points was developed. This network is built taking into account landscape structure of the territory, and provides control over landscape and geochemical currents and barriers. The average index of soil cover pollution of the polygon was calculated taking into account different toxicity of the elements. This index reaches its maximum in the region of firing positions and military polygon. The average Zc index of the upper soil level is 32, which corresponds to the dangerous level of soil pollution. The research revealed the content of moveable forms of heavy metals in soil cover of the polygon in order to identify toxic and tolerant levels of heavy metals concentration and reserve sources of elements in soils, which can maintain optimal concentration level in soil solution. It was defined that content of heavy metals in three movable forms are represented in the following geochemical units, mg/kg: in acid soluble form – Mn > Zn > Pb > Cu > V > Ni > Co > Cd; in exchangeable form – Mn > Zn > Pb > V > Co = Ni > Cu > Cd; in water soluble form – Mn > Zn > Pb = V > Co > Ni > Cd > Cu. The article presents research results on accumulation intensity and the nature of distribution of gross and mobile heavy metals forms in soil and on their migration in the soil profile. The dominant technogenic geochemical unit was extracted: Cd > Hg > Pb > Cu > Zn > Ni > V > Co > Mn. Landscapes with maximum polyelement contamination have been identified.
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Babić, Tomislav, Marko Kršulja e Maja Šupuković. "Mechanical load caused by physical activity by wearing military equipment". Zbornik Veleučilišta u Rijeci 9, n.º 1 (2021): 387–99. http://dx.doi.org/10.31784/zvr.9.1.24.
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In this paper fatigue for professional soldier caused by active physical activity and endurance limits is investigated. The resulting workload is one of indicators of how training, preparedness and other acquired work skills can contribute to the human body being a large working “machine”. Ergometry test was conducted and field test for soldier fitness condition and energy expenditure was measured regarding the level of body’s metabolism. Field test consisted of three runs on a polygon of 10 km and different workloads, the energy consumption was monitored. Work load was compared with Occupational Safety and Health law acts. The results showed difference in workload conditions and hart rate which allowed to determine rest spots and safety in training conditions.
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Pokonieczny, Krzysztof, e Sylwia Borkowska. "Using artificial neural network for labelling polygon features in topographic maps". GeoScape 13, n.º 2 (1 de dezembro de 2019): 125–31. http://dx.doi.org/10.2478/geosc-2019-0012.
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Abstract The purpose of this article was to present the methodology which enables automatic map labelling. This topic is particularly important in the context of the ongoing research into the full automation of visualization process of spatial data stored in the currently used topographic databases (e.g. OpenStreetMap, Vector Map Level 2, etc.). To carry out this task, the artificial neural network (multilayer perceptron) was used. The Vector Map Level 2 was used as a test database. The data for neural network learning (the reference label localization) was obtained from the military topographic map at scale 1 : 50 000. In the article, the method of applying artificial neural networks to the map labelling is presented. Detailed research was carried out on the basis of labels from the feature class “built-up area”. The results of the analyses revealed that it is possible to use the artificial intelligence computational methods to automate the process of placing labels on maps. The results showed that 65% of the labels were put on the topographic map in the same place as in the case of the labelling which was done manually by a cartographer. The obtained results can contribute both to the enhancement of the quality of cartographic visualization (e.g. in geoportals) and the partial elimination of the human factor in this process. Highlights for public administration, management and planning: • Map label placement is among key variables ensuring the usability of topographic maps across disciplines. • We present the neural network approach for automating the process of labelling topographic maps with locality names. • The presented case study applies to the military map in scale 1:50 000, but can be applied on other maps and geoportals.
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Zasjadko, A., V. Ryzhkov, O. Yula e V. Zozulia. "ANALYSIS OF THE FEATURES OF PROCESSING ALGORITHMS OF EXTERNAL TRAJECTOR INFORMATION RECEIVED OF THE MFTR-2100/40 RADAR SYSTEM". Наукові праці Державного науково-дослідного інституту випробувань і сертифікації озброєння та військової техніки 16, n.º 2 (12 de julho de 2023): 37–45. http://dx.doi.org/10.37701/dndivsovt.16.2023.05.
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The peculiarities of processing measurement information received by the MFTR-2100/40 radar system as part of a mobile polygon measuring and computing complex are considered. After processing, the results of external trajectory measurements obtained using the radar channel are used to determine the parameters of samples of weapons and military equipment.
The factors that worsen the process of measurement by the radar system are analyzed. Analyzed processing parameters in the WinTrack software, which can be interpreted ambiguously by the operator and lead to false results. Recommendations are provided for the use of the MFTR-2100/40 radar system, taking into account meteorological phenomena.
The presented results will provide an opportunity for more qualitative and effective testing and certification of weapons and military equipment offered for supply to the Armed Forces of Ukraine.
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Bartošová, Naděžda. "Ability of automatic detection of conflict between planes in flight simulations with the help of expert system". MAD - Magazine of Aviation Development 3, n.º 13 (15 de janeiro de 2015): 5. http://dx.doi.org/10.14311/mad.2015.13.01.
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This article examines options for applying expert systems for the needs of identification of conflict situations between planes in flight simulations, which are applied during basic training of air traffic controllers. It focuses on the conditions for basic training of military air traffic controllers and presents the use of rule systems to automatic detection of conflict between planes within a basic training polygon. The system of rules is a part of the expert system, consisting of realisation of tasks for identifying optimum resolution of conflict situations in selected types of simulations.
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Khrushchov, D., S. Chumachenko e A. Splodytel. "METHODOLOGICAL FOUNDATIONS OF THE IMITATIONAL MODELLING OF THE GEOLOGICAL ENVIRONMENT OF THE MILITARY ACTIVITY TERRITORIES (AT THE DIVYCHKY POLYGON AS AN EXAMPLE)". Geochemistry of Technogenesis 6, n.º 34 (25 de dezembro de 2021): 107–12. http://dx.doi.org/10.15407/geotech2021.34.107.
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The methodological basis of a theory for information support of research and work on management of the geological component of military activity territories is founded on the development of a typification of geological environment violations resulted from military activity, highlighting the types of geological environment and forms of military impact on the geological environment, establishing a mechanism and forecasting the development of geosystems. The methodical basis consists in development of the principles of information models of the geological environment disturbanses, which serve as the basis for determining methods and technologies for eliminating the consequences of negative military activity impact upon the geological environment, i.e., degraded sites recovery. The purpose of the introduction of this methodological apparatus is to optimize the structuring of the geological environment of the object, which will increase the resolution and overall adequacy of the infogeological model. The package PDE Toolbox computer mathematics systems MatLab 7.1.4 was used for simulation of pollution distribution in landscape profiles of an artillery blast hole. It showed us a picture of the changes in the concentration of the solution of pollutants on the landscape profile down to the first groundwater horizon 90 days from the moment of intense snowmelt.To assess the pollution migration dynamics according to the mathematical modeling in the PDE Toolbox package of the MatLab 7.1 computer mathematics system, the dependence of the change in the concentration of the solution of pollutants spread along the landscape profiles of the artillery blast hole was recieved. The obtained data indicate that within the territory affected by military activity, depending on the state of density and permeability of rocks in the zone of unsaturated filtration, the vulnerability of groundwater to geochemical factors of technogenic pollution increases.
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Pidlisnyuk, Valentina, Tatyana Stefanovska, Olexander Zhukov, Artem Medkow, Pavlo Shapoval, Vitalii Stadnik e Martyn Sozanskyi. "Impact of Plant Growth Regulators to Development of the Second Generation Energy Crop Miscanthus × giganteus Produced Two Years in Marginal Post-Military Soil". Applied Sciences 12, n.º 2 (15 de janeiro de 2022): 881. http://dx.doi.org/10.3390/app12020881.
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The impact of the plant growth regulators (PGRs) Stimpo, Regoplant, and Charkor on the production of the second-generation energy crop Miscanthus × giganteus on marginal post-military soil was investigated during two vegetation seasons. The land, previously a tank training polygon, has not been in use since 1990 and has become marginal. Biological parameters (stem, shoot, and root lengths) and dry biomass values were evaluated in relation to the applied treatments. The multivariate general linear model (M-GLM) results showed a positive influence of Charkor on M. × giganteus development; the effect was markedly higher in the second year of vegetation. The impact of Stimpo and Regoplant was less noticeable; nevertheless, certain combinations of treatments showed satisfactory results. The M-GLM approach detected the inter-influence of the main factors of the production process, i.e., PGRs, soil, and year of growing. The results showed the predominant influence of year, PGRs and combined factor PGRs × year on the biological parameters; the other studied factors and their combinations were not as effective. Further research should focus on verifying the field-scale results for the M. × giganteus plantation established in a post-military area and compare the lab and field studies.
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Козневски e E. Kozniewski. "New Methods of the Computer Aided Design of Roof Skeletons". Geometry & Graphics 4, n.º 2 (18 de junho de 2016): 3–7. http://dx.doi.org/10.12737/19827.
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The problem of efficient design of roofs is a topical
area of research. This is confirmed by scientific studies [1–5, etс.].
Today, in the times of information technology in all areas of actively
using the computer and specific programs [6; 12; 15, etc.].
The author presents a proposal of geometric design (geometric
solutions) for roofs with restrictions, so-called "roof with its
neighbors."Roofs are treated as a special class of polyhedral surfaces.
Construction includes a corresponding attachment roof with
restrictions on the roof on a simple connection of the polygon,
designing a conventional roof and perform the appropriate logic operation. Fig. 1. The Boolean operations are useful tools in geometrical
designing of roof skeletons. Solving roofs with neighbors
is much easier if we bring them to solve simple roofs over simpleconnected
polygon base. The difficulty comes to the design of an
appropriate polygonal base. This method essentially involves applying
geometric design of a regular roof to design a roof with
constraints, which can be relatively easily performed with a CAD
program [13]. The elements of a roof: a) a roof with its elements
in the orthographic projection, b) the roof with its elements in a
military axonometry, c) the line of disappearing ridges of the roof
in the orthographic projection [9].
Livros sobre o assunto "Military polygon"
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Cave, Nigel. Polygon Wood. Barnsley, South Yorkshire: Cooper, 1999.
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Cave, Nigel. Polygon Wood. London: Leo Cooper, 1998.
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Royle, Trevor. A dictionary of military quotations. New York: Simon & Schuster, 1989.
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Royle, Trevor. A Dictionary of military quotations. London: Routledge, 1990.
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Brown, Benjamin N. Imperial colours: A dictionary of XIX century military uniform terms in English, French and German. Millington, Md: Caltrop Press, 2000.
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Guidère, Mathieu. Dictionnaire multilingue de la défense et du maintien de la paix: Français, anglais, espagnol, arabe = Multingual defence dictionary peacekeeping operations : French, English, Spanish, Arabic = Diccionario polígloto de la defensa y del mantenimiento de la paz : francés, inglés, español, árabe. Paris: Ellipses, 2004.
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Mori, Edoardo. Dizionario multilingue delle armi: Italiano-tedesco-inglese-francese-spagnolo ... : le armi antiche e moderne in 8700 voci di tecnologia, militaria, balistica, caccia, arceria e tiro. Firenze: Olimpia, 1998.
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Mori, Edoardo. Dizionario multilingue delle armi: Italiano-tedesco-inglese-francese-spagnolo ... : le armi antiche e moderne in 8700 voci di tecnologia, militaria, balistica, caccia, arceria e tiro. Firenze: Olimpia, 1998.
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Philippines. Komisyon sa Wikang Filipino., ed. Tumbasang diksyunaryo ng mga katawagang pangmilitar: Ingles-Fil.-Seb.-Hlg.-Mar.-Tau.-Mag. [Manila]: Komisyon sa Wikang Filipino, 2000.
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Oestmann, Rainer. Wspólne zadanie--! =: Ein gemeinsamer Auftrag--! = Common mission--! Toruń: Adam Marszalek, 2000.
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Chittick, Andrew. "Vernacular Languages". In The Jiankang Empire in Chinese and World History, 82–101. Oxford University Press, 2020. http://dx.doi.org/10.1093/oso/9780190937546.003.0004.
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Chapter 4, “Vernacular Languages,” offers the second of two case studies in the ethnicization of cultural features of the Wuren. Using the results of modern linguistic studies, the chapter shows that the vernacular spoken languages of the Jiankang Empire have a substantial, perhaps predominant, non-Sinitic basis, most importantly in the Austro-Asiatic family (along with Mon and Khmer, among others). These languages were recognized as decisively foreign by people of the Central Plains. Within the empire, the polyglot linguistic situation in the fifth and sixth centuries was addressed by the use of one of two common spoken tongues, either Jiankang Elite vernacular (the most Sinitic language within the empire) for the educated class, or, to a much lesser but still significant extent, Chu vernacular among the military.
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Seeman, Sonia Tamar. "Romani Professional Entertainers in the Ottoman Empire". In Sounding Roman, 74–123. Oxford University Press, 2019. http://dx.doi.org/10.1093/oso/9780199949243.003.0003.
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Ottoman rulers and members of the aristocracy utilized spectacular displays as “theatre state” to effectively institute and maintain power over their subjects and relied on the captivating skills of Romani professional entertainers. Romani entertainers survived through developing polyglot repertoires and styles from their stigmatized social position, existing in the Ottoman world as aesthetic cosmopolitans. Ottoman rulers implemented controls over such displays of music and dance due to their desire to curb inherently coercive affective power. The histories of entertainer types are traced, ranging from male and female as professional dancers (köçek; çengi), specialists on zurna, violin, G clarinet, percussion, and mehter military instruments. A description of çiftetelli and karşılama dance forms and their characteristic movements is followed by an analysis of two recordings performed by Romani musicians from the early twentieth century in order to explore the parameters of keriz musical improvisation and kıvrak melodies that inspire bodily movement.
Trabalhos de conferências sobre o assunto "Military polygon"
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Pelin, Florin, e Raluca anca Pelin. "USE OF MODERN TECHNOLOGIES (ICT) FOR PERFORMANCE MONITORING IN BIATHLON". In eLSE 2014. Editura Universitatii Nationale de Aparare "Carol I", 2014. http://dx.doi.org/10.12753/2066-026x-14-253.
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Winter Biathlon can be considered one of the oldest human activities. It has its origins in hunting on skis. Military skiing patrols and their actions are reported more frequently at the very beginning of the second millennium AD in the northern regions. Biathlon trials combine two disciplines: cross-country skiing and rifle shooting when passing through a polygon. In biathlon, performance is reflected by three main factors: - Running speed on skis with the gun carried on the back; - Residence time in the polygon; - The shooting performance. Improving the results of these three factors has been an ongoing concern of both technicians and athletes. Computers have played a very important role in achieving outstanding performance as they provide opportunities for monitoring both during training and during competitions. In sports training, computers are used both in the practical activities carried out in the field and in laboratory activities. In competitive activity, computer use has become indispensable for: - Computer research; - Monitoring the reactions of biathletes during competitions; - Collecting, recording, processing and interpreting the results; - Analyzing biathletes' performance during competitions in terms of physical, technical, tactical and psychological training; - Developing the competitive schedule which is of major importance for the periods needed for getting in and out of athletic shape; - Recording the results obtained by biathletes in competitions; - Predicting outcomes in subsequent competitions. The aim of our paper is to introduce the means to use computers in order to monitor performance in biathlon for cross-country skiing and rifle shooting when passing through a polygon.
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Carpiceci, Marco, e Fabio Colonnese. "Le mura di Leonardo. I rilievi del 1502". In FORTMED2020 - Defensive Architecture of the Mediterranean. Valencia: Universitat Politàcnica de València, 2020. http://dx.doi.org/10.4995/fortmed2020.2020.11363.
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Leonardo’s Walls. Surveys in 1502In the summer of 1502, Cesare Borgia appointed Leonardo da Vinci for his engineering expertise. His assignment was specific and concerning with military architecture: he was expected to “see, measure and do good estimation”. The Codex L, a small notebook conserved in the Library of the Institute of France, show the results of the survey of the city walls of Cesena and Urbino. The technique Leonardo adopted consists in traversing rectilinear stretches, measuring their length by means of an instrument able to count his steps and establishing their orientation by means of a compass. At the end of the path, the data relative to the sides of a closed polygon are obtained, resulting the geometric plan of the walls. This practice is testified by some residual eidotypes provided with quotas and orientations. In some cases, only the lists of distances in numbers are present, but the analysis of the figures makes it possible to reconstruct the surveyed plans, as Nando De Toni pioneered many years ago. This study focuses on the tools and the urban survey technique used by Leonardo. The analysis of some sheets from the Codex L, contextualized with respect to the actual topography of the sites, allows to understand the correct sequence of the operations carried out first in the site and then at the drawing board. By means of specific digital reconstructions, it is therefore possible to study the instrumental and operational limits of this practice and, by comparing it with the current state, to reconstruct the entire defensive structure.
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Magnaghi-Delfino, Paola, Giampiero Mele e Tullia Norando. "Il pentagono come strumento per il disegno delle fortezze". In FORTMED2020 - Defensive Architecture of the Mediterranean. Valencia: Universitat Politàcnica de València, 2020. http://dx.doi.org/10.4995/fortmed2020.2020.11324.
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The pentagon as a tool for fortresses’ drawingStarting from the fifteenth century, the diagram of many fortresses has a pentagonal shape. Among the best known fortresses, in Italy we find the Fortezza da Basso of Florence, the Cittadella of Parma, the Cittadella of Turin, Castel Sant’Angelo in Rome. The aim of this article is to analyze the reasons that link form and geometry to the planning of the design and the layout of pentagonal fortresses. The pentagon is a polygon tied to the golden section and to the Fibonacci sequence and it is possible to construct it starting from the golden triangle and its gnomon. This construction of the pentagon is already found in the book De Divina Proportione by Luca Pacioli and is particularly convenient for planning pentagonal fortresses. If one wants to draw the first approximated golden triangle, one can just consider the numbers of the Fibonacci sequence, for example 5 and 8, which establish the relationship between the sides: 5 units is the length of the base and 8 units the length of the equal sides. In the second isosceles triangle, which is the gnomon of the first, the base is 8 units long and equal sides are 5 units long; half of this isosceles triangle is the Pythagorean triangle (3, 4, 5). This characteristic of the golden triangles, that was already known by the Pythagoreans and, in a certain sense, contained in the symbol of their School, allows to build a pentagon with only the use of the ruler and the set square. The distinctive trait of the construction just described makes preferable to use the pentagon in the layout of the military architectures in the fieldworks. We have verified the relationship between numbers, shape and size in the layout of Castel Sant’Angelo (1555-1559) in which the approximate pentagon was the instrument for the generation of its form.
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Rodrigues, José Miguel, e C. Guedes Soares. "Ship Vertical Loads From Using an Adaptive Mesh Pressure Integration Technique for Froude-Krylov Forces Calculation". In ASME 2017 36th International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/omae2017-62613.
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Dynamic vertical bending moments are determined for a military vessel hull in still water and under head waves, with a weakly nonlinear method. The domain for hydrostatic and undisturbed pressures integration is time-variant and generated with a quad-tree adaptive mesh algorithm, on which exact formulations for pressure on polygonal elements are used. Linear radiation and diffraction pressures, on another mesh superimposed with the aforementioned, are calculated with a frequency domain code. Results are compared with published experimental ones for small and large wave heights.
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Fratini, Fabio, Manuela Mattone e Silvia Rescic. "The building materials of “Colle del Melogno” Central Fort (Liguria, Italy)". In FORTMED2020 - Defensive Architecture of the Mediterranean. Valencia: Universitat Politàcnica de València, 2020. http://dx.doi.org/10.4995/fortmed2020.2020.11544.
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The Melogno pass (Colle del Melogno) is located at 1026 m above sea level, between the high Val Bormida and the hinterland of the Finalese (province of Savona) and is one of the highest mountain passes in the Ligurian Alps. In ancient times, this zone was considered strategically important from the military point of view since it is located at the crossroads of many communication routes. In these areas, in November 1795, during the “Battle of Loano”, the French army, commanded by Andrea Massena and the allied army of Austria, prevailed over the Kingdom of Sardinia, led by Oliver Remigius von Wallis. However, the territory remained possession of the Kingdom of Sardinia and, between 1883 and 1895, the worsening of relations with France induced the government to erect, near the pass, three imposing fortifications (Tortagna, Settepani and Centrale) to prevent an entry into Piedmont by armies coming from the coast. For the same purpose other fortifications were erected near the passes of Tenda, Nava, Turchino and near the villages of Zuccarello, Altare and Vado. The most impressive among the three fortifications of Melogno pass is the Central Fort. It occupies all the saddle of the pass and it is crossed by the provincial road 490 connecting the coast of Finale Ligure to Piedmont. The fort, still of military property, is a listed historical artefact. It has a polygonal shape, with a main barrack developed on two floors. Four defensive and attacking emplacements were located outside the main complex, along a detached hill, with heavy artillery pointed towards the coast. The study will examine the natural and artificial stone materials used for the building through mineralogical and petrographic analysis and will verify both the variations occurred during the construction phases and the relations with the local supply sources.
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Scholar, C., N. C. Perkins e Z. D. Ma. "Low Order Vibration Models for Tracked Vehicles". In ASME 1999 Design Engineering Technical Conferences. American Society of Mechanical Engineers, 1999. http://dx.doi.org/10.1115/detc99/vib-8201.
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Abstract A vehicle track model is developed with the objective of providing new capabilities in modeling track vibration response. Understanding track vibration is essential to evaluating the durability of track components, the vibration energy transmitted to the vehicle, and the acoustic emission from the vehicle. A new element model is derived herein that represents a track span as a continuous elastic member with distributed inertia. This model captures the effects of static track sag. static and dynamic track tension, track translation speed, and the coupling of longitudinal and transverse track vibration. Results from a companion experimental study on a section of track support the use of this continuum approximation. The track element model is extended to describe an entire track circuit for an example military vehicle. An eigenanalysis of this circuit model leads to the system vibration modes that are subsequently employed in a low-order model for forced response. The forced response characteristics resulting from two major excitation sources, roadarm motion and polygonal action, are described. The modal content of the track response is then examined to determine the minimum size model required to describe track vibration. It is concluded that low-order system models may be developed as efficient alternatives to established large degree-of-freedom multi-body track models.
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Gubo, Stefan. "USING HANDHELD GPS RECEIVERS IN PRIMARY SCHOOL EDUCATION". In eLSE 2016. Carol I National Defence University Publishing House, 2016. http://dx.doi.org/10.12753/2066-026x-16-145.
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The Global Positioning System (GPS), as the first fully operational global navigation satellite system, is one of the modern technologies which have been expanding in our everyday life. This system continuously provides accurate three-dimensional position (often indicated in terms of latitude, longitude and altitude) and time data to a user located on the surface of the Earth or in the air. Currently, there are millions of users of GPS receivers worldwide. Not only can these units be used for military, scientific, industrial, agricultural purposes or during outdoor free-time activities, but also in teaching certain subjects from upper primary school level to university level. Using GPS receivers and GPS-based activities gives teachers opportunities to transform their classrooms from teacher-centered environments to environments that focus on student engagement in the learning process. The main purpose of this paper is to outline the possibilities of using handheld GPS receivers in teaching mathematics at primary school level. We introduce and discuss the results of an activity conducted in primary schools in Slovakia and Hungary. The activity included a theoretical as well as a practical part, and the participants were 7th grade (12-13 year old) students. During this activity, the students have learned how to use the handheld GPS receiver, and then solved measuring tasks around the school. Data were gathered by means of observation, analysis of students' tracks, a survey and interviews with students. The results show highly motivated students, who enjoyed participating in the activity. Students indicated they learned how to determine their position, the distance between two locations and the area of polygonal plot of land using a handheld GPS receiver.