PREDICTIVE DEFINITION OF THE SEVERITY OF CLOSED CHEST AND ABDOMINAL TRAUMA CAUSED BY SHOTS FROM 12-GAUGE "FORT-500" RIFLES WITH SHOCK-TRAUMATIC BULLETS OF "TEREN-12P" CARTRIDGES

Objective – the predictive definition of the severity of closed chest and abdominal traumaaccording to the reduced AIS injury scale when firing at various distances from "Fort-500" rifles with shock-traumatic bullets of "Teren-12P" cartridges, depending on theirballistic and energetic characteristics in contact with the human body.Material and methods. To establish the speed of bullets of cartridges "Teren-12P" atvarious distances of the shot in the conditions of KhNSC «Hon. Prof. M. S. BokariusForensic Science Institute» experimental shots from the "Fort-500A" and "Fort-500M1"pump-action guns were conducted. In total, two series of 25 shots were fired from eachgun. The values of the velocities of the bullets at the moment of the firing were measuredusing optoelectronic complexes. The determination of the parameters of the trajectory ofthe flight of bullets was carried out by a combined method by means of calculations basedon the results of experimental shots. The obtained data were processed using licensedMicrosoft Excel spreadsheets.Results. According to the research results, it has been found that the ballistic coefficient of the bullet of the "Teren-12P" cartridge is 47.3 kg/m2. This made it possible to determinethe ranges of minimum and maximum speeds of bullets at different shooting distances.Analysis of the data showed that in some cases the speed of bullets at a distance of 3.5m significantly exceeded the speed range declared by the manufacturer of the cartridges.According to the calculated values, according to the literature data, the graphs of thedistribution of the BC blunt injury criterion and the reduced AIS damage scale wereplotted depending on the distance of the shot for the minimum and maximum bullet speedsof the "Teren-12P" cartridges. According to the graphs, when the "Teren-12P" bulletsare fired at their maximum speeds, there is a 50% risk of a closed chest and abdominalinjury according to AIS -2 – AIS-3 at all distances up to 50 m. Even at minimum bulletspeeds cartridges "Teren-12P" there is a 50% risk of formation of a closed abdominaltrauma according to AIS-2 – AIS-3 with shots from a distance of up to 40 m, and chestinjuries – up to 30 m. Closed trauma to these areas of the body according to AIS-4 can bepredictably caused by shots from a distance of up to 10 m.Conclusions. A significant range of variability in the initial speeds of elastic bullets canlead to an incorrect expert estimate of the firing distance due to the fact that similargunshot wounds can be caused by both a bullet with a high initial speed from a longrange of a shot and a bullet with a low initial speed from a close firing distance. Whenthe "Teren-12P" bullets are fired from "Fort-500" rifles, there is a 50 % risk of a closedchest and abdominal injury according to AIS -2 – AIS-3 at all shooting distances up to50 m. Chest and abdominal injuries according to AIS -4 can be predictably caused whenfired from distances up to 10 m. The results obtained can be used in carrying out complexforensic examinations in cases of the use of "Teren-12P" cartridges.

Glacier geometry and flow speed determine how Arctic marine-terminating glaciers respond to lubricated beds

Basal conditions directly control the glacier sliding rate and the dynamic discharge of ice flow. Recent glacier destabilization events indicate that some marine-terminating glaciers quickly respond to lubricated beds with increased flow speed, but the underlying physics, especially how this vulnerability relates to glacier geometry and flow characteristics, remains unclear. This paper presents a 1-D physical framework for glacier dynamic vulnerability assuming sudden basal lubrication as an initial perturbation. In this new model, two quantities determine the scale and the areal extent of the subsequent thinning and acceleration after the bed is lubricated: Péclet number (Pe) and the product of glacier speed and thickness gradient (dubbed J0 in this study). To validate the model, this paper calculates Pe and J0 using multi-sourced data from 1996–1998 for outlet glaciers in Greenland and Austfonna Ice Cap, Svalbard, and compares the results with the glacier speed change during 1996/1998–2018. Glaciers with lower Pe and J0 are more likely to accelerate during this 20-year span than those with higher Pe and J0, which matches the model prediction. A combined factor of ice thickness, surface slope, and initial speed for ice flow physically determines how much and how fast glaciers respond to lubricated beds, as forms of speed, elevation, and terminus change.

Comparative Analysis and Controller Design for BLDC Motor Using PID and Adaptive PID Controller

: This paper describes the Adaptive PID (APID) controller design for speed control preference of Brushless Direct Current (BLDC) motor over the Proportional Integrative Derivative (PID) controller. A methodology of the Adaptive PID controller is proposed, which tunes the parameters automatically. Modeling of the BLDC motor was carried out using PID and Adaptive PID controller, respectively. The behavior of the BLDC motor is analyzed without a controller and by using the conventional PID controller and the new APID controller. Hence the result obtained is analyzed and compared by taking two cases. In the first case of constant speed, the PID controller gave large variability in the initial speed and could not track the desired speed. Also, applied torque could not track the desired speed due to a significant deviation in the actual motor speed. Whereas, in the case of APID, the controller gave small variability in the initial speed and could track the desired motor speed. In the second case of variable speed, the PID controller produced a random response at a variable speed. Whereas, in APID, the controller had an accurate response at variable speed, with no deviation. The result obtained shows that the APID controller provides effective, easier, and fast controlling of the BLDC motor. The output response of the BLDC motor is achieved, and the result is analyzed with the help of utilizing MATLAB and SIMULINK. Background: The BLDC motor is considerably used in the home, transportation, and industrial application. Objective: Comparative analysis of modeling and control of BLDC motor drives for the variable required speed. Method: PID and APID controllers are used in this paper to operate the BLDC motor. Results: A Fixed and variable speed response of both APID and PID controlled BLDC motor is obtained. Conclusion: Response of the speed control of APID controlled BLDC motor is superior to PID controlled BLDC motor at variable speed.

An Analysis of Vulnerable Road Users Overtaking Maneuver along the Urban Road

This paper discusses driving styles while overtaking a vulnerable road user who moves along the shoulder in urban roads. Based on the data obtained from an experiment in pre-defined conditions (combinations of four main effects: vehicle’s initial speed, lane width of the road, vulnerable road users’ type, and location in the shoulder) with an immersive driving simulator, we analyzed four different driving styles of drivers while approaching and passing the objects. It is shown that drivers took avoidance maneuvers even if there was no clear risk of collision to vulnerable road users. The results showed that the drivers tended to have a unique perception about the lateral passing gap and overtaking strategy with two worth notice groups: overcaution drivers and reckless drivers. The road characteristic has a statistically significant effect for all types of drivers. Moreover, the effect of the vehicle’s initial speed on overtaking strategy and the effect of vulnerable road user location on minimum lateral passing gap are statistically significant. The findings provide some implications for the development of automotive safety systems that can reduce the risk of overtaking maneuvers in urban areas.

СИНТЕЗ ЗАКОНУ КЕРУВАННЯ ЕЛЕКТРОПРИВОДОМ ВЕНТИЛЯТОРА ЗЕРНОКИДАЧА ДЛЯ ФОКУСУВАННЯ ЗЕРНОВОГО ПОТОКУ

The work considers the solution to the urgent problem of reloading grain into vehicles and reducing its damage. The possibility of throwing grain at a given range by creating an appropriate ballistic flight path by adjusting the speed of the electric drive of the belt when it is powered by a frequency converter is substantiated. The problem of reducing the focus of grain scattering by forming the flow of grain and controlling its movement not only when moving on the belt, but also after the separation of the flow and its movement in the air. Focusing of the lower layer is achieved by giving it an additional initial speed, which is provided by the air flow from the fan installed under the belt. For the frequency converter of the electric drive of the fan, in the form of a regression model, the control law which considers parameters of grain and necessary range of transportation is synthesized. Experiment planning theory was used to synthesize the control law.

EXPERIMENTAL STUDIES OF THE PROCESS OF CUTTING THE HEAD OF CHICORY ROOTS

Reducing the energy consumption of the technological process of harvesting the main mass of chicory root buds is provided by developing, justifying the parameters and the use of advanced hooking modules. According to the results of field planned factor experiments, a regression equation is obtained, which characterizes the change in the cutting length of root heads from the initial speed of the knife, which is mounted rigidly on the pendulum of the copra at an angle to the direction of knife movement. The results of the study are the prerequisites for the development and improvement of methodology and methods of calculation and justification of rational structural and kinematic parameters of the working bodies of hook-harvesting modules of root-harvesting machines.Kеу wоrds: pendulum copier, hard knife, cutting length, knife speed, knife mounting angle, regression equation.

Lane-deviation penalty formulation and analysis for autonomous vehicle avoidance maneuvers

Autonomous vehicles hold promise for increased vehicle and traffic safety, and there are several developments in the field where one example is an avoidance maneuver. There it is dangerous for the vehicle to be in the opposing lane, but it is safe to drive in the original lane again after the obstacle. To capture this basic observation, a lane-deviation penalty (LDP) objective function is devised. Based on this objective function, a formulation is developed utilizing optimal all-wheel braking and steering at the limit of road–tire friction. This method is evaluated for a double lane-change scenario by computing the resulting behavior for several interesting cases, where parameters of the emergency situation such as the initial speed of the vehicle and the size and placement of the obstacle are varied, and it performs well. A comparison with maneuvers obtained by minimum-time and other lateral-penalty objective functions shows that the use of the considered penalty function decreases the time that the vehicle spends in the opposing lane.

On discrete time epidemic models in Kermack-McKendrick form

Surprisingly, the discrete-time version of the general 1927 Kermack-McKendrick epidemic model has, to our knowledge, not been formulated in the literature, and we rectify this omission here. The discrete time version is as general and flexible as its continuous-time counterpart, and contains numerous compartmental models as special cases. In contrast to the continuous time version, the discrete time version of the model is very easy to implement computationally, and thus promises to become a powerful tool for exploring control scenarios for specific infectious diseases. To demonstrate the potential, we investigate numerically how the incidence-peak size depends on model ingredients. We find that, with the same reproduction number and initial speed of epidemic spread, compartmental models systematically predict lower peak sizes than models that use a fixed duration for the latent and infectious periods.

Simulation of a Motor Vehicle Momentarily Accelerating in Various Road Conditions

In this paper some selected conclusions have been drawn from the simulated maneuver of a vehicle’s momentary acceleration in various road conditions. The aim of this paper was to answer the question whether the random irregularities of the road could decrease the final speed of the vehicle and cause it to deviate from the straight line motion and to what extent. These irregularities had three different maximum amplitudes which enabled analysis of vehicle’s acceleration on the less and the more uneven road. Also, almost the same and almost different profiles were assumed for the left and the right wheels of the vehicle’s model. Some additional phenomena such as the ice on the road have been taken into account. The initial speed was 20 km/h and after 2 s the vehicle started to accelerate. Then, after 8 s the simulation stopped, which gave the whole simulation time equal to 10 s.

Simulation of Granular Organic Fertilizer Application by Centrifugal Spreader

There is no specialized equipment designed to spread granular cylindrical organic fertilizer in the soil. There are also no rational recommendations available on how to spread this type of fertilizer. Mineral fertilizer spreaders are most often used for spreading granulated organic fertilizer. However, these fertilizers are significantly different from mineral fertilizers. Due to these differences, organic granular fertilizers often are spread unevenly, and the fertilizer does not reach the required working width. Furthermore, the rate of spreading is not accurate, and the fertilizer is often crushed too much. The objective of this research is to develop a simulation model for granular organic fertilizer applications with a centrifugal spreader in EDEM (extended distinct element method) software. It is possible to develop a numerical model that corresponds to a real spreader, and to determine the key physical–mechanical parameters for the application of granular organic fertilizer. This model can also be used for evaluating the transverse uniformity of the fertilizer in the field (along the trajectory normal to the machine). The results of this research show that the distance traveled by the fertilizer granules partially depends on the particle size, initial speed, type of fertilizer and the parameters of the spinning discs of the spreader.