Unit Body Research Articles

Use of small-sized units when spreading fertilizers on mountain slopes

BACKGROUND: The results of RD on a laboratory sample of the unit for spreading mineral fertilizers on mountain slopes, which can increase labor productivity and yield rate of mountain forage lands by 15–20%, are presented. AIM: Development of a small–sized laboratory sample of the unit for surface spreading of mineral fertilizers, ensuring accelerated restoration of productive and qualitative functions of natural grass stands of fallow forage lands. METHODS: The technical expertise and testing of the unit and the technology were carried out in the mountainous zone of the Republic of North Ossetia — Alania (Dargava basin, the station of North Caucasian Research Institute of Highland and Piedmont Agriculture) at an altitude of 1540 meters above sea level. The indicators of the test conditions and functional performance of the unit have been determined according to the OST 10.5.1-2000 industry standard. Surface fertilization was carried out according to the OST 10.7.1.-2000. “Testing of agricultural machinery. Machines for applying mineral fertilizers, lime materials and gypsum” industry standard. The study subject was the technology of spreading granular fertilizers, the design of the unit and working bodies: pendulum spreading devices, spreading rates and method of spreading fertilizers. RESULTS: A laboratory sample of the small-sized unit based on the KChG-2.4 cultivator of North Caucasian Research Institute of Highland and Piedmont Agriculture design for surface application of mineral fertilizers has been developed and manufactured. The block module is a hinged frame structure with a tow-lifting device, pendulum spreading tubes and rolling rollers installed on it. The considered motion of the mining unit is across the slope from top to bottom in a shuttle manner with rolling of the sown granules by rolling rollers. The tests were carried out on a rarefied section of the northern slope with a steepness of 13–16° in the area “Sugsadtanrag”. CONCLUSION: The practical application of the small-sized unit for surface spreading of mineral fertilizers with their subsequent rolling in areas in mountainous and foothill zones will ensure a reduction in the degradation processes of slope areas by accelerating the restoration of the quality and quantity of perennial grasses of fallow forage lands.

Tracking anthropometric dimensions and grip strength among children, adolescents and adults in an indigenous community of southern Mexico: 1968-1978-2000.

To track body size and proportions, arm dimensions and grip strength in children, adolescents, and adults resident in an indigenous community in Oaxaca who were measured on two or three occasions across surveys in 1968, 1978, and 2000. The three cross-sectional surveys included measures of height, weight, sitting height, arm circumference, triceps skinfold, and grip strength in surveys of schoolchildren in 1968 and of schoolchildren, adolescents and adults in 1978 and 2000. Cross-checks of surnames, forenames and ages/dates of birth of participants in the three surveys identified three samples of individuals measured on two occasions (1968-1978, two age groups in 1978-2000) and a subsample of individuals measured in the three surveys. Partial correlations controlling for age at each observation were calculated for each variable in the three sex-specific samples measured on two occasions, and for the subsamples of males and females measured on three occasions. Allowing for variation in age among subsamples, inter-age correlations were moderate to high for stature, moderate for sitting height and estimated leg length, and low to moderate for weight, BMI, arm and estimated arm muscle circumference, triceps skinfold, and grip strength. Allowing for the relatively broad chronological age intervals, the inter-age correlations for height, weight and BMI were at the low end, while those for grip strength and for strength per unit body weight for males (though not females) were generally in the range of correlations noted in studies of European samples. Likely associated with improved health, nutritional, and sanitation conditions, obesity and overweight were emerging among adults by 2000. Obesity and overweight in adults paralleled the introduction of mechanized agriculture that reduced routine physical work. Among children, the association of obesity and overweight is likely with increased nutritional availability, but poor choices in diet.

Suspension of Local Government Bodies and Establishment of Receivership During Martial Law

The subject of the article is the analysis of legal provisions regulating the supervisory measure, which is the suspension of the bodies of a local government unit and the establishment of receivership in their place during martial law. The aim is to discuss the procedure for its application and the premises justifying supervisory interference, determining its legal nature and comparing it with similar regulations in Polish law. Considerations in this regard are preceded by comments on constitutionally defined states of emergency, including martial law, in which the title measure is optionally applicable. In the context of martial law, the procedure for its introduction was described and its legal assessment was made. The analysis also covers the principles of operation of public authorities during martial law, including the admissibility of authoritative interference in their organization and functioning, which is useful in explaining the specificity of legal regulations in the examined area. To achieve the goals of the study, the dogmatic-legal method was used. It involves the analysis and interpretation of the texts of legal acts. To the extent required, the article also takes into account administrative court jurisprudence.

Energy cost of running uphill as compared to running on the level with impeding horizontal forces.

We have previously shown that accelerated running on flat terrain is biomechanically equivalent to running uphill at a constant speed. This hypothesis was further investigated comparing the energy cost of running at a constant speed either uphill, or on flat terrain against an equivalent horizontal impeding force, mimicking acceleration. Steady-state O2 consumption and the corresponding energy cost (per unit body mass and distance) were determined on 12 male subjects during treadmill running at speeds between 2.11 and 2.89 m/s: (i) on the level, (ii) uphill at 10 or 20% incline ( ), or (iii) on the level against a horizontal traction force of 10 or 20% of the subject's body weight ( ). This allowed us to estimate the net efficiency ( ) of running against horizontal or vertical forces, as given by the ratio between the additional mechanical work output under , or the corresponding condition, and the difference between the appropriate energy cost above that for running at constant speed on flat terrain. The values when running uphill ( ) amount to 0.35-0.40, whereas those for running against an equivalent impeding force ( ) are about 10% greater (0.45-0.50), a fact that may be due to a greater recovery of elastic energy in the as compared to the condition. Making allowance for these small differences, these data support the view of considering accelerated running on flat terrain biomechanically equivalent to running at a constant speed, up an equivalent slope.

Characterization of Pore Structure and Fluid Mobility of Shale Reservoirs.

Accompanying the commercial exploitation of shale oil and gas in North America, shale oil has gradually become an important resource, sparking great interest among countries around the world in recent years. In this study, focusing on the Paleogene Shahejie Formation in Bohai Bay (Eastern China), techniques such as CT, nitrogen adsorption, mercury injection capillary pressure (MICP), and nuclear magnetic resonance (NMR) were used to characterize the pore structure and mobility of the shale reservoir. Based on the X-ray CT data, the pore radius of the shale reservoir is in the range 0.5-65 μm, and the pore coordination number is concentrated in the range of 1-4. The shale reservoir is poorly connected. The minimum size of the unit body for establishing the digital core model is 380 μm. Based on the experimental data of nitrogen adsorption and MICP, the pores of shale in the study area are mainly classified as ink-bottle-shaped pores, transition-shaped pores, and flat plate slit-shaped pores. The specific surface area and volume of pores are mainly attributed to meso- and macropores. The movable fluid saturation of shale is distributed from 23.59 to 44.42%, the pore throat radius is distributed from 0.001 to 6 μm, and the lower limit of the movable pore throat radius of shale is distributed between 9.0 and 20.1 nm. The movable fluid porosity is mainly distributed between 0.84 and 4.08%, with an average movable fluid porosity of 2.37%. The findings provide a theoretical basis for the efficient development of shale oil resources.

Water retention property and microscopic mechanism of shallow soil in inner dump improved by fly ash and polyacrylamide.

Improving the water retention property of shallow soil in the inner dump is the key step in the sustainable development of mines. In recent years, the use of fly ash to improve the structure of the inner dump and polyacrylamide as an additive to enhance water retention was an effective method. The article used a physical model test, filter paper method, and microstructure analysis method to compare and analyze the water retention property and microstructure of slope-improved soil with different fly ash and polyacrylamide content. The results show that the combined use of fly ash and polyacrylamide improved the water retention property of the amended soil. Fly ash and polyacrylamide had a greater effect on the low suction stage of the amended soil. Polyacrylamide reacted with water and bound soil particles to form aggregates, and the structural unit bodies were a block structure. Fly ash was non-sticky and was a matrix of fine particles, which weakened the bonding effect of polyacrylamide, and reduced the aggregates of soil particles, and the structural unit bodies were a flocculated structure of aggregates mixed with matrix. This, in turn, enhanced the capillary action and improved the water retention performance of the improved soil. In addition, polyacrylamide could connect water molecules, further enhancing the water retention property of the improved soil. The combined use of fly ash and polyacrylamide improved the available water content of improved soil, providing a viable and sustainable solution for improving the comprehensive utilization of fly ash, and laid the foundation for land reclamation at the inner dump.

A new human metabolic rate sensing model optimization and wearable sensor realization

Accurate assessment of metabolic rate is crucial for predicting human thermal comfort. However, many existing instruments are bulky, invasive, and inconvenient. Additionally, wearable metabolic rate measurements have faced long-standing challenges due to a lack of a comprehensive theoretical model with easy-to-measure parameters. This paper optimizes our previously proposed theoretical approach for wearable metabolic rate measurement that incorporates heart rate, whole-body unit heat loss, skin resistance, and body muscle percentage. We have improved the evaluation approach for whole-body unit heat loss by introducing a newly designed convective heat loss coefficient from various body segments. Regarding the wearable sensor design, a heat loss measuring system with serpentine channel was verified as the most suitable design following calibration experiments. We also integrated a modified square-wave-based skin resistance design, resulting in an upgraded integrated metabolic sensor. To validate our sensor and model performance, we conducted experiments with ten subjects of both genders at three temperature conditions (22, 25 and 28 °C) and four levels of activities (rest, tiptoe heel, slight walk, and moderate walk). First, our results demonstrate a strong positive relationship between the metabolic rate obtained by our optimized sensor and Quark CPET instrument, with high coefficients of determination (highest:0.97 from the male group, 0.98 from the female group). Our approach achieved at least 96 % accuracy and less than 2.5 % uncertainty for both groups. Second and increasingly, we found that only one metabolic rate model was required across combined temperature conditions when the person was fixed. Third, the positive relationship was further improved by incorporating whole-body unit heat loss. Finally, we obtained information from different segments on skin temperatures. In summary, our study provides a powerful methodology for predicting and evaluating human metabolic rate through an innovative wearable approach. Our approach and sensor have the potential to substantially contribute to energy-saving efforts in smart buildings.

Impact of online learning on administrationstudents of the Academic Unit of Ahuacatlán.

Online learning is a new educational model that has left much to be desired in the use of the student body of the academic unit of Ahuacatlán (UAAH). The investigation has a quantitative approach with a non-experimental and descriptive design, whose objective is to analyze the level of learning in the academic achievement of UAAH students, who have experimented with the use of digital platforms in their training process. online. The research question is answered through a Likert scale questionnaire with 11 items, applied among 90 business administration students. The answer show that students are more comfortable with classroom classes than virtual classes, that their failure rate does not increase and that the teacher training was not correct. It can be concluded that significant knowledge in students is generated more in person.

Gospodarowanie odpadami komunalnymi w czasie kryzysu geopolitycznego z punktu widzenia budżetu gminy

The article aims to present the problem of paying for municipal waste management in the face of the influx of refugees caused by the war in Ukraine. The number of people residing in Poland has significantly increased, and as a result more waste is generated. The authors analyse current legal regulations and judgments of administrative courts and the Constitutional Tribunal to determine who is obliged to pay the municipal waste management fee and what proper steps this entity should take. Due to the nature of the problem, the dogmatic-legal method was used to analyse the texts of legal acts, court decisions and available literature. The solution proposed by the authors can be used in practice by the bodies of local government units adjudicating the determination of the municipal waste management fee amount.

Training, Nutrition, and Sports Supplement Strategies of an Elite Female Masters Cyclist: A Case Study

Background: The purpose of this case report was to compare the training, diet, and supplement strategies of a 54-year-old female national-class cyclist to what is typically recommended in the literature. Methods: This case study examined the training, nutrition, and supplement strategies of a 54-year-old Masters female cyclist who won the 2023 USA Cycling Time Trials. Data was acquired via a smartwatch that the athlete wore in all of her training sessions over 29 weeks, outlining the volume of training as well as macronutrient and supplement consumption. Results: Her average weekly training volume was 167.0±61.4 miles (268.8±98.8 km; mean ± standard deviation [SD]). The number of training sessions per week was 8.4±2.1. In addition, the percentage of the weekly training sessions that consisted of high-intensity interval training was 55.3±20.1 %. Her mean energy intake was 2444±101 kcal or 36.6 kcal/kg. Her macronutrient intake was 228±33 grams (g) of carbohydrate, 95±34 g of fat, and 196±25 g of protein. Expressed per unit body weight daily (kilograms or kg), her macronutrient intake was 3.3 g/kg carbohydrate, 1.4 g/kg fat, and 2.9 g/kg protein. After 29 weeks of training, the athlete won first place in the 30k USA Cycling Time Trial (Masters) with an average speed of 23.35 miles per hour (37.6 km/hr.). Conclusions: The results highlight that for this particular female athlete, consuming a high-protein diet coupled with a moderate intake of carbohydrates is a viable strategy for endurance events (e.g., cycling time trials). It should also be noted that the majority of her training sessions consisted of interval training.

Comparability of comparative toxicity: insect sensitivity to imidacloprid reveals huge variations across species but also within species.

Pesticides have been identified as major drivers of insect biodiversity loss. Thus, the study of their effects on non-pest insect species has attracted a lot of attention in recent decades. In general toxicology, the 'gold standard' to assess the toxicity of a substance is to measure mass-specific LD50 (i.e. median lethal dose per unit body mass). In entomology, reviews attempting to compare these data across all available studies are lacking. To fill this gap in knowledge, we performed a systematic review of the lethality of imidacloprid for adult insects. Imidacloprid is possibly the most extensively studied insecticide in recent times, yet we found that little is comparable across studies, owing to both methodological divergence and missing estimates of body mass. By accounting for body mass whenever possible, we show how imidacloprid sensitivity spans across an apparent range of approximately six orders of magnitude across insect species. Very high variability within species can also be observed owing to differences in exposure methods and observation time. We suggest that a more comparable and comprehensive approach has both biological and economic relevance. Ultimately, this would help to identify differences that could direct research towards preventing non-target species from being negatively affected.

Financial Security and Invoicing in Management of Public Enterprises Whose Founders are Local Self-Government Units, Example Republic of Serbia

The purpose of the study was to analyze two forms of invoicing in the operations of public companies that were established by local self-government units in the Republic of Serbia. At the same time, to point out the importance of introducing electronic invoicing in regular business. The author's focus was on the comparison of classic and electronic invoicing with the aim of improving the future financial reporting of companies according to the administrative bodies of local self-government units. The analysis of this process was carried out through a threefold observation of the evaluation, namely: employees, top management of the company and management of the administrative bodies of local self-government units. Our contribution is reflected in the fact that we discovered that there are large differences in the level of significance of the t test, i.e. they are less than the threshold level of significance for all analyzed factors (p<0.0005*) in all 6 analyzed factors and in their total observation, between classical and electronic invoicing. Also, higher values were obtained when evaluating electronic invoicing compared to classical financial reporting of public companies, which indicates the importance of introducing the mentioned form of financial reporting.

Tibia properties in broilers raised on their own commercial diets with different growth rates and sex during a 10-week rearing period.

Genetic selection applied to broilers results in fast growth and an increase in meat yield. However, this situation causes welfare problems in broilers. The aim of this study is to determine the weekly changes in the tibia characteristics in broilers raised on their own commercial diets. In the study, 168 (84 female and 84 male) slow-growing (Hubbard-Isa Red JA) and 168 (84 female and 84 male) fast-growing (Ross-308) day-old broiler chicks were used. Six broilers from each genotype and sex group were weighed weekly and slaughtered to determine the tibia properties during the 10-week fattening period. Fast-growing broilers had higher tibia weight and longer length, diaphysis diameter and medullary canal diameter than those of slow-growing broilers at the same age. In fast-growing genotypes, the cortical index was low only in the 2nd week, and Robusticity and Seedor indices were observed to be better throughout the whole fattening. The ash content of the total tibia in the fast-growing broilers was higher in all of the examined weeks except the 4th week and the 9th week of fattening than that in the slow-growing broilers. Although the amount of ash per unit body weight in the 1st week of fattening was higher in fast-growing broilers, this situation reversed after the 4th week. The level of all minerals examined in total tibia weight is high in fast-growing broilers, and they differed according to the fattening period. When comparing tibia characteristics of two different genotypes fed their own commercial diets, the tibia structure was found to be stronger in fast-growing broilers compared to other genotypes at the same age, but slow-growing broilers were more prominent in terms of body weight. It was observed that the mineral density was higher in male broilers, except in the 1st week.

Scientific and Technical Basis for the Development of an Induction Heating Unit for Milk Pasteurization

Introduction. Induction heating is a preferred heating technique for industrial, medical and consumer systems, because it has a number of advantages over traditional heat transfer methods. The advantages include energy efficiency, heating rate, safety of operation, cleanliness of the process, low metal consumption, simple design, and precise control of the temperature of the heated raw materials. An induction heating unit is especially important for farms involved in processing of milk and producing milk-based products. Aim of the Study. The study is aimed at developing a prototype unit for long-term pasteurization of milk using a container heated by induction currents and at selecting optimal operating conditions for the developed prototype unit. Materials and Methods.There was used 3D modeling in the KOMPAS-3D computeraided design system to develop the main components of a milk pasteurization prototype unit with induction heating. The container for raw materials, stirrer and lid are made of stainless steel AISI 304 and AISI 430. The inductor is a frame made of polymer material with a litz wire arranged in a spiral manner. The body of the prototype unit is made of aluminum composite material. The developing and debugging of the electronic circuit of the prototype unit power part was carried out with the use of the design program Proteus 7.10. The microcontroller Mega 2560 was used to make the power part of the electromagnetic induction generation unit. The controlled temperature was monitored by using the waterproof temperature sensor DS18B20. A thermal imager was used to visualize the propagation of the thermal field over the surface of the container walls. Results. The structure diagram of the developed prototype unit with induction heating for long-term pasteurization of milk is presented. The article gives grounds to the use of the necessary elements and actuators in the unit for pasteurization of milk in a container heated by induction currents. There are presented a diagram of the developed power part for the prototype unit and the results of testing it when heating containers made of various materials. An algorithm has been developed to control the operation and PID regulation of the milk pasteurization in an experimental unit with the use the Raspberry Pi microcomputer. The graphs of transient processes when changing the coefficients of PID temperature control are presented. Discussion and Conclusion. When testing the induction heating principle on stainless steels of different compositions, it has been concluded that for the efficiency of heating the container, there is required a ferromagnetic steel pad welded on top of the main container made of food-grade stainless steel. The developed system of inductors made it possible to create a prototype unit with two heating zones depending on the volume of processed raw materials that is important for small farms engaged in processing milk and producing milk-based products.

The importance of intravenous glucose tolerance test glucose stimulus for the evaluation of insulin secretion

For 100 years, the Intravenous glucose tolerance test (IVGTT) has been used extensively in researching the pathophysiology of diabetes mellitus and AIRg—the IVGTT-induced acute insulin response to the rapid rise in circulating glucose—is a key measure of insulin secretory capacity. For an effective evaluation of AIRg, IVGTT glucose loading should be adjusted for glucose distribution volume (gVOL) to provide an invariant, trend-free immediate rise in circulating glucose (ΔG0). Body weight-based glucose loads have been widely used but whether these achieve a trend-free ΔG0 does not appear to have been investigated. By analysing variation in AIRg, ΔG0 and gVOL with a range of IVGTT loads, both observed and simulated, we explored the hypothesis that there would be an optimum anthropometry-based IVGTT load calculation that, by achieving a trend-free ΔG0, would not compromise evaluation of AIRg as an index of beta cell function. Data derived from patient and research volunteer records for 3806 IVGTT glucose and insulin profiles. Among the non-obese, as gVOL rose, weight increased disproportionately rapidly. Consequently, the IVGTT glucose load needed for an invariant ΔG0 was progressively overestimated, accounting for 47% of variation in AIRg. Among the obese, ΔG0 was trend-free yet AIRg increased by 11.6% per unit body mass index, consistent with a more proportionate increase in weight with gVOL and a hyperinsulinaemic adaptation to adiposity-associated insulin resistance. Simulations further confirmed our hypothesis by demonstrating that a body surface area-based IVGTT load calculation could provide for a more generally invariant IVGTT ΔG0.

A Low Omega-3 Index and High AA/EPA Ratio in American College Football Players are Both Improved Following 5 Weeks of DHA-Rich Algae Oil Supplementation

Abstract Purpose Many athletes are deficient in long chain omega-3 polyunsaturated fatty acids (LC n-3 PUFA). A consequent low Omega-3 Index (O3I) and high arachidonic acid/eicosapentaenoic acid (AA/EPA) ratio increase cardiovascular disease risk and inflammation. Algae oil is a plant-based, sustainable source of LC n-3 PUFA, suitable for vegans and vegetarians. Effects of algae oil supplementation on whole blood fatty acids among athletes has not been previously reported. This study evaluated the effects of 5 weeks of DHA-rich algae oil supplementation on the whole blood fatty acid profile, O3I and AA/EPA ratio of omnivorous Division I American College Football (ACF) players. Methods: Data, including a spot blood sample, were collected at baseline for all participants (n = 47), then for a subset of players (n = 22) following a 5-week control period (usual diet) and 5 weeks of algae oil supplementation (usual diet + 1575 mg docosahexaenoic acid (DHA) + eicosapentaenoic acid (EPA) 5 days/week; average 1125 mg/day). Results: Baseline O3I was 4.3% ± 0.1% and AA/EPA ratio was 45.6 ± 23.8. After 5 weeks of algae oil supplementation, the O3I was 6.1% ± 1.0% and the AA/EPA ratio was 25.1 ± 11.6. The O3I was significantly higher and the AA/EPA ratio was significantly lower (P < 0.0001 for both) compared with both baseline and the end of the control period. The increase in O3I from baseline was correlated with calculated DHA + EPA dose per unit body mass (R = 0.641, P = 0.001). Conclusions: Algae oil supplementation for 5 weeks improved both the low baseline O3I and high AA/EPA ratio among ACF players, with body mass specific dose effects.

ESTABLISHMENT OF BASELINE CONDITIONS FOR TRICYCLE RESEARCH IN TUGUEGARAO CITY, PHILIPPINES

There are a lot of initiatives to reduce the effect of global warming. In the Philippines, in the sector of transportation, shifting to a modernized mode of transportation (EVs), development of mass transport, and the like are being pushed. However, the effectiveness of each solution cannot be quantified without established baseline information. The objective of this study is to provide baseline information on 2-stroke and 4-stroke tricycles in Tuguegarao City. Experimental test runs are conducted to determine the effect of the general terrain, weight, road gradient, and age on the mileage efficiency of the tricycles. For general mileage efficiency, ten 2-stroke and ten 4-stroke tricycles are deployed on the same routes. Results show that the average mileage efficiency of the 2-stroke is 23.4 km/L, while that of the 4-stroke tricycle is 31.77 km/L. On a flat road, an additional load of one (1) kg on the tricycles decreases the mileage efficiency by an average of 0.4131% and 0.4095% on the 2-stroke and 4-stroke tricycles, respectively. The 4-stroke tricycle is 30% more efficient when tested on inclined roads. There is no direct relationship between the age of the tricycles tested and their corresponding mileage efficiency. A representative drive cycle for each type of tricycle is developed using a microtrip-based cycle construction. A load cycle is also developed based on the representative drive cycles constructed. The results of this paper will be a good input for future transportation-related studies in the city. This could also be the basis of Local government unit (LGU) and other lawmaking bodies in drafting policies related to transportation and environment.

Estimates of Inhaled and Deposited Doses following Exposure to Humidifier Disinfectant Containing Polyhexamethylene Guanidine (PHMG)

We estimated the inhaled and deposited dose in humans using the International Commission on Radiological Protection (ICRP) and multiple-path particle dosimetry (MPPD) models following exposure to humidifier disinfectant containing polyhexamethylene guanidine (PHMG). The disinfectant has caused at least 1,810 deaths, with an odds ratio of lung injury of 47.3 (95% confidence interval: 6.1–369.7), because of its application in Korea. In this study, the Oxy product, which is regarded as the causative agent of most lung diseases, was sprayed into a cleanroom at normal (6.5 ppm in solution) and worst case (65 ppm in solution) dilutions; the airborne aerosol was monitored with direct reading instruments. Areas of deposition were divided into the head airway, tracheobronchial, and alveolar regions. Four dose scenarios were considered in this study: adults and children in both daily average and sleep conditions. Most PHMG aerosols were smaller than PM1 (96%). Number-based concentration analysis showed that <100 nm nanoparticles comprised 81% and 69% of the aerosol when the 6.5 and 65 ppm solutions were used, respectively. In all scenarios, the number-based deposited dose increased in the order of alveolar, tracheobronchial, and head airway regions; the mass-based deposited dose increased in the order of the head airway, alveolar, and tracheobronchial regions. The deposited dose per unit body weight was higher in children than in adults in terms of both number- and mass-based concentrations. When the humidifier was sprayed, the highest number-based concentration was found at a particle size of 15.4 nm; the highest deposition fraction or dose by PM1 was observed in the pulmonary and head airways in both models.

ПЛАНИРОВАНИЕ ОПТИМАЛЬНЫХ ПРОГРАММНЫХ ДВИЖЕНИЙ ГРУЗОЗАХВАТНОГО ОРГАНА АВТОМАТИЗИРОВАННОГО ПОГРУЗЧИКА

Currently, loaders with a semi-automatic control system are widely used in automated production when working with cylindrical piece loads. When performing such a technological process, it is necessary that the cargo handling body makes optimal movements from the cargo to the place of laying. Therefore, it is proposed to consider and calculate the positioning of the lifting body of the loading unit. The calculation of the inverse problem of moving the gripper is carried out. The synthesis of trajectories of movement of the output link of the lifting body in space is considered.

Исследование тока утечки по струе тонкораспылённой воды из автоматической установки пожаротушения на электрооборудование под напряжением

Purpose. The article is devoted to the safety issue of applying an automatic fine water spray suppression system for extinguishing fires of live electrical equipment. The study examined the worst-case scenario, in which fire suppression system is manually activated by an operator. The results of a series of experiments to determine the leakage current when discharging extinguishing agent from automatic fire suppression systems onto live electrical equipment are presented. Methods. To achieve the goal of the research the authors used analysis and experiment methods. Findings. An experimental study on automatic water spray fire suppression system was carried out, and as a result of the experiment the values of leakage current on the pumping unit body and nozzle-head were determined. Power and linear regression equations were obtained by the least squares method. Based on regression equations, diagrams of dependence of the leakage current value on the intensity (k-factor) supply of fine water spray to the nozzle-head and the pumping unit body were created. Research application field. The obtained experimental data confirm the possibility of safely using automatic suppression systems with fine water spray for live electrical equipment extinguishment while meeting certain values of the intensity of extinguishing agent supply. Conclusions. Based on the analysis of experimental data and the obtained regression equations, it can be concluded that the intensity of the extinguishing agent supply (k-factor) has a significant impact on the leakage current on the body of an automatic fire suppression system and nozzle-head.