Solving a Triangle in Teaching Primary School Mathematics

The paper studies solving a triangle in primary school mathematics education. It proposes a system of problems reflecting the classification of the concept of triangle according to the sides and the angles. Each subsystem of a given main system includes a basic problem with generalized formulation and a sample solution followed by problems illustrating the basic problem. The methodological analysis encompasses some didactic components – short description, construction/drawing, sample solution, necessary component concepts, component pieces of knowledge and component problems. All drawings in the study have been made by using the mathematical software GeoGebra in order to ensure dynamism and clarity, and subsequently to achieve easier understanding of a problem and finding out its solution.

Production of and Supply of the Army with Small Arms on the Eve of the Russo-Turkish War (1877–1878). A Brief Overview of the Russian Military Industry

In the wake of the Crimean War, the upper military circles in Russia changed their thinking with regard to firearms. General Milyutin became Minister of War. It was the time when Alexander II reigned over Russia. In 1856, the calibre of Russian firearms was reduced to 6 inches, or 15.24 mm. The process of re-equipping the Russian army with M1856 rifles using expanding Minié bullets was launched. These rifles demonstrated that the percussion systems had reached the limit of their capacity for improvement. Nothing else could be improved in terms of their firing speed. Despite the resistance of the conservative military circles, Milyutin encouraged new inventions, and the 1860s became a period of experimentation with firearms. Some new cartridge systems were introduced. The high-quality M1856 percussion rifle was not destined to take part in war times, but the Russian army had been fully equipped with it for a short period of time. Almost all systems of the 1860s were based on this rifle. Over 10 systems of firearms with an internal needle fuse were proposed to the weapons commission. In 1866, the Englishman Karle proposed his own system with an internal needle fuse. Krnka, Berdan I, and Berdan II came next. After 1866, the Terry-Norman, Karle, and Krnka rifles entered the Russian army. These systems were developed on the basis of the 6-line M1856/58 rifle. The latter was converted into a rear-loading rifle. In 1869, the Krnka rifle was chosen as the main system, which became the main weapon of the Russian army in the following years. At the beginning of 1877, there were 613,297 Krnka rifles, 150,868 Karle rifles, 17,810 Berdan I and 325,254 Berdan II rifles in the Russian army.

Innovative Multifunctional Unit for Alternative Tillage

An alternative project of a tillage device is presented, the main working process of which is implemented through a destructive effect on the soil by directed impulse shocks of compressed air. It is shown that the main cultivation of the soil occurs by means of the main working body consisting of the spokes of the hubs and tips connected with a source of compressed air via a central main system. It is noted that behind the main working body there are auxiliary elements of the milling cutter and rollers using which the finishing of the soil takes place.

Establishing ROS on Humanoid Soccer Robot-BarelangFC Software System

Humanoid robot is built on several sub-programs or systems which is integrated to each main programs in order to command the robot to move as a soccer player. Each main programs namely as a movement system, a visual sense system (vision), a sub-controller system, and a game strategy. Currently, each of main system constructed using different programming language, for instance: the vision system used python while the others used C and LUA for the movement kinematics. Employing different programming language will affect to response system because each of main system need to be integrated using socket in the beginning process. Robot response will be slow and cost a lot of memory usage. Therefore, in this paper will present a migrating process into robot operating system (ROS) and switch all the robot main system into python language. The integrated program will be examined in real-time application while the robot moved on the field. We used a python ROS in order to make the robot play autonomously on the field.

An Enhanced Electroporator Design for Pulse Generation

An electroporator is an instrument used for delivering electrical pulses to a tumor. In this work, an electroporator consisting of three main system blocks, namely High Voltage (HV) source, nanosecond (ns) switching, and pulse generation, was designed, developed, and evaluated to generate high voltage ns pulses to treat tumors. The high-voltage source block was used to convert the 9.6V DC from the battery to a variable HV output and store this charge for later use. The ns switching block contained a MOSFET-based low-side switch which applies short ns pulses to the load. The pulse generation block generates short ns pulses and supplies the adequate current to turn on the MOSFET at a quicker rate aiding the application of these pulses to the load. This process was simulated using PSpice software and the results are presented.

A ROLE OF TRAILOKYA CHINTAMANI RAS IN THE MANAGEMENT OF COVID PANDEMIC: A REVIEW

SARS-CoV-2 a virus born disease spread by droplet infection involving multi system failure but the main system affected by it is respiratory system. In this pandemic condition, when there is no treatment, Ayurveda offers various drugs that have proven to be highly useful in treating this condition, one of which being Trilokya Chintamani Ras, which has proven to be a miracle in treating mild to severe instances of covid 19. This medicine proved to be a life-saving elixir. It is a mineral compound that contains Bhasmas from several minerals. The minerals utilised in this drugs' shown antiviral properties, preventing cytokine storm in mild to moderate instances, while also acting as ambrosia in covid 19 patients.

Using Division Method to Convert the K-Input MIMO System to SISOs System Combined with Optimal Algorithm Application to Control of a Flexible Link System for the Oscillation (K =1,2)

The flexible link system (FLS) was a highly nonlinear model, multivariable and absolutely unstable dynamic system. In practice, it is common to integrate multiple subsystems into the main system with dynamically turned k-input signals (k =1, 2,…, N) to diversity the functionality of the main system. The flexibility of the division method to convert k-input MIMO system to SISOs system combined with the optimal algorithm creates a powerful tool that can be applied to many different MIMO nonlinear systems with high success rates. The optimal controllers can be created in the future for the flexible system is implemented on an experiment system using Arduino UNO micro-controller KIT. This paper describes division method to convert the k-input MIMO system to SISOs system, after that combined with the optimal algorithm to control for the flexible link system. Specifically, the author will conduct oscillating component analysis of a system with k input pairs (k =1, 2) so that the author can better understand the nature of sub-components as they interact with the system.

Institutional Performance of Irrigation System in Spatial Dimensions in Semi-Arid Region Timor Island East Nusa Tenggara

Thirty-four percent (34.40%) of irrigation areas in Indonesia are under the authority of the central government, 17.89% under the authority of the provincial government and 47.71% are under the authority of the District/Municipality government. Various efforts have been made by the government to improve the performance of surface water irrigation systems that cover 78% of the total irrigation area, however, the performance did not improve significantly. One of the cause is due to the damage of national surface water canals that affect the performance of the irrigation system. The purpose of this study was to analyze the factors that influence the institutional performance of the irrigation system in the spatial dimension in the semi-arid region of Timor Island, East Nusa Tenggara. The spatial approach of the Geographically Weighted Regression (GWR) method was chosen as an alternative approach in the analysis of irrigation system performance because it considers the variability of hydrogeological characteristics and the performance of different irrigation systems in each irrigation area based on their authority. The results of this study indicated that the total cropping intensity had a significant effectand decreased the performance of the irrigation system. The higher rice productivity and the maintenance frequency of the main system (headworks and canals) would improve the performance of the irrigation system. Meanwhile, the lower damage rate of the main system would improve the performance of the irrigation system. Irrigation area under the authority of district/municipality had a lower/worse irrigation system performance than those under the authority of provincial and central governments.

Optimal Design of Bistable Nonlinear Energy Sink Based on Global Vibration Control

Although a linear vibration absorber (LVA) or nonlinear energy sink (NES) can effectively mitigate the vibration of the main system in harmonic excitation, the amplitude of the absorber can be very large. Using the single-objective differential evolutionary (DE) algorithm, this paper pioneers the global control of the main system and a bistable NES to achieve decent vibration mitigation effects and decrease the global response of the system. Using the multi-objective DE algorithms and comparing the optimization results of the LVA, this paper proposes multi-objective and multi-parameter design criteria of a bistable NES. The mass ratio, the displacement amplitude, and the mechanical energy are optimization goals. The results show that the maximum amplitude of the main system and the absorber can be controlled at the same level, and the global control strategy does not change the resonance frequency of the main system. Compared with the LVA, the bistable NES has similar vibration mitigation effects with the variation of the mass ratio in the multi-objective optimization. However, the bistable NES can achieve better control over a larger spring stiffness range. Therefore, through single- and multi-objective optimization design, this paper proves the superiority of the bistable NES in the vibration mitigation. Meanwhile, this paper provides an optimization design method for global vibration control.

Periodic Response Analysis of A Jeffcott-Rotor System By The Integral Equation Method

In this paper, two modified nonlinear saturation-based controllers and negative velocity feedback controllers are integrated to suppress the horizontal and vertical vibrations of a horizontally supported Jeffcott-rotor system at primary resonance excitation and the presence of 1:1 and 1:2 internal resonances. The second order approximations and the amplitude equations are obtained by applying the integral equation method to analyze the nonlinear behavior of this model. The stability of the steady-state solutions is ascertained based on the Floquet theory. The necessity of adding a negative velocity feedback to the main system is stated. The effects of different control parameters on the frequency-response curves and the force-response curves are investigated. Time histories of the whole system are included to show the response with and without control. It is shown that the saturation-based controller can reduce the system response to almost zero and the negative velocity feedback can suppress the transient vibrations and prevent the main system having the large amplitude vibration. The analyses show that analytical solutions are in excellent agreement with the numerical simulations. Finally, a comparison with previously published works is included.