Experimental studies of new design solutions for the fencing of refrigerated car and container bodies

2020 ◽  
Vol 17 (4) ◽  
pp. 498-513
Author(s):  
Yu. P. Boronenko ◽  
◽  
B. A. Abdullaev ◽  
Keyword(s):  
Thermal Properties ◽  
Practical Importance ◽  
Experimental Studies ◽  
The Body ◽  
New Materials ◽  
Conductivity Equation ◽  
Thermal Conductivity Equation ◽  
Perishable Goods ◽  
Heat Transfer Coeffi ◽  
Technical Solutions

Objective: To choose materials and technical solutions for thermal insulation in the structure of the fencing of refrigerated car and container bodies. Methods: Experimental studies of the thermal properties of the selected materials were carried out on a physical model using climatic and test chambers, analytical calculations using thermal conductivity equation. Results: The thermal properties of the thermal fencing structures of the body of refrigerated cars and containers were determined. Practical importance: New materials reduce the heat transfer coeffi cient of the fence, which will reduce fuel consumption and increase the safety of perishable goods, reduce weight and increase the volume of the body

Designing a detachable body with sliding side walls and a roof

2021 ◽  
Vol 18 (1) ◽  
pp. 62-71
Author(s):  
O. I. Zaynitdinov ◽  
Keyword(s):  
Practical Importance ◽  
Atmospheric Precipitation ◽  
Middle Part ◽  
The Body ◽  
3D Design ◽  
Car Body ◽  
Simultaneous Loading ◽  
Side Walls ◽  
Loading And Unloading ◽  
Technical Solutions

Objective: Selection of technical solutions for designing a covered detachable body fence with sliding side walls and a roof. Methods: A detachable body with sliding side walls and a roof was designed in accordance with several technical and regulatory documents using the KOMPAS-3D design software. Results: The covered detachable body with sliding side walls and a roof designed for the carriage of goods that require protection from atmospheric precipitation has been proposed. A scheme of a lock for side sliding doors and a linkage scheme of the doors’ middle part have been developed. Drawings of the main load-bearing elements of the car body are presented, including the underframe with three longitudinal and several transverse and auxiliary beams. The diagram of fastening the sliding door roller assemblies on the car body to the lower longitudinal beams and to the upper beam is given. Practical importance: The covered detachable body with sliding side walls and a roof allows reducing the time and human effort of loading and unloading the car, provides simultaneous loading and unloading of goods both from the side and from the top of the body using various hoisting devices.

Physiological and hygienic substantiation of development of a technique of an estimation of overalls for protection working in the heating environment on indicators of a thermal condition

2019 ◽  
pp. 1013-1019 ◽  
Author(s):  
O. V. Burmistrova ◽  
T. K. Losik ◽  
E. S. Shuporin
Keyword(s):  
Thermal State ◽  
Experimental Studies ◽  
The Body ◽  
Labor Process ◽  
Physical Work ◽  
Vapor Permeability ◽  
New Materials ◽  
Protective Properties ◽  
Heat And Moisture ◽  
Made In

Sanitary and hygienic assessment of overalls for workers in a heating environment is currently carried out only on the physical, mechanical and hygienic properties of the materials from which it is made, not taking into account the effect of clothing on the thermal state of the human body and its heat and moisture exchange with the environment. Th e results of studies of the thermal and functional state of a person performing physical work in a heating environment showed differences in the formation of the thermal load on the body depending on the air temperature and the type of workwear used to protect against production hazards, as well as the significance of the thermophysical parameters of the materials (air permeability, vapor permeability, hygroscopicity) of which it is made. In addition, the development and manufacture of new materials with special protective properties, including using nanotechnology, expanding their assortment for the manufacture of workwear dictates the need to test their protective properties not only at the stands, but also in finished products in experimental studies involving humans. Th erefore, it is urgent to develop a methodology for evaluating workwear according to indicators of a person’s thermal state, which allows determining the degree of influence of the whole complex of environmental factors, labor process and workwear on the thermal state of people working in a heating environment in order to predict it and establish the work schedule in relation to specific conditions. Th e technique is intended for organizations involved in the design and development of workwear used in a heating environment, as well as materials for its manufacture; for testing laboratories performing sanitary-hygienic assessment of personal protective equipment.

scholarly journals Trapping liquid drugs inside crystals

2014 ◽  
Vol 70 (a1) ◽  
pp. C984-C984
Author(s):  
Alessia Bacchi ◽  
Davide Capucci ◽  
Paolo Pelagatti
Keyword(s):  
Human Health ◽  
Crystal Engineering ◽  
Room Temperature ◽  
The Body ◽  
New Materials ◽  
Active Molecule ◽  
Crystalline Materials ◽  
Pharmaceutical Ingredients ◽  
Solid Dosage ◽  
Intellectual Properties

The objective of this work is to embed liquid or volatile pharmaceuticals inside crystalline materials, in order to tune their delivery properties in medicine or agrochemistry, and to explore new regulatory and intellectual properties issues. Liquid or volatile formulations of active pharmaceutical ingredients (APIs) are intrinsically less stable and durable than solid forms; in fact most drugs are formulated as solid dosage because they tend to be stable, reproducible, and amenable to purification. Most drugs and agrochemicals are manufactured and distributed as crystalline materials, and their action involves the delivery of the active molecule by a solubilization process either in the body or on the environment. However some important compounds for the human health or for the environment occur as liquids at room temperature. The formation of co-crystals has been demonstrated as a means of tuning solubility properties of solid phases, and therefore it is widely investigated by companies and by solid state scientists especially in the fields of pharmaceuticals, agrochemicals, pigments, dyestuffs, foods, and explosives. In spite of this extremely high interest towards co-crystallization as a tool to alter solubility, practically no emphasis has been paid to using it as a means to stabilize volatile or labile or low-melting products. In this work we trap and stabilize volatile and liquid APIs and agrochemicals in crystalline matrices by engineering suitable co-crystals. These new materials alter the physic state of the active ingredients allowing to expand the phase space accessible to manufacturing and delivery. We have defined a benchmark of molecules relevant to human health and environment that have been combined with suitable partners according to the well known methods of crystal engineering in order to obtain cocrystals. The first successful results will be discussed; the Figure shows a cocrystal of propofol, a worldwide use anesthetic.

scholarly journals Performance Evaluation of Heading-and-Winning Machines in the Conditions of Potash Mines

2021 ◽  
Vol 11 (8) ◽  
pp. 3444
Author(s):  
Sergey A. Lavrenko ◽  
Dmitriy I. Shishlyannikov
Keyword(s):  
Energy Efficiency ◽  
Experimental Studies ◽  
Efficiency Coefficient ◽  
Mechanized Method ◽  
Methodological Approaches ◽  
The Stability ◽  
Technical Solutions ◽  
Potash Mine ◽  
Complex Indicators ◽  
Potassium Magnesium

The authors focus on the process of potash ore production by a mechanized method. They show that currently there are no approved procedures for assessing the performance of heading-and-winning machines operating in the conditions of potash mines. This causes difficulties in determining the field of application of heading-and-winning machines, complicates the search for implicit technical solutions for the modernisation of existing models of mining units, prohibits real-time monitoring of the stability of stope-based technological processes and makes it difficult to assess the performance of the services concerning mining enterprises. The work represents an aggregate assessment of the performance of heading-and-winning machines for potash mines by determining complex indicators describing the technological and technical levels of organising the work in stopes. Such indicators are the coefficients of productivity and energy efficiency, respectively. Experimental studies have been carried out in the conditions of the potash mine of the Verkhnekamskoye potassium-magnesium salt deposit to assess the performance of the latest and most productive Ural-20R heading-and-winning machines manufactured in Russia. Using the above methodological approaches, this paper shows that the unsatisfactory technological performance of the studied machine is due to the low productivity of the mine district transport. The average productivity coefficient was 0.29. At the same time, high values of the energy efficiency coefficient show that the productivity of the machine is on par with design conditions.

Experimental Studies on Diesel Engine with Piston Crown Modification Using an Optimum Alternative Fuel

2015 ◽  
Vol 813-814 ◽  
pp. 830-835
Author(s):  
Akkaraju H. Kiran Theja ◽  
Rayapati Subbarao
Keyword(s):  
Diesel Engine ◽  
Combustion Chamber ◽  
Experimental Studies ◽  
Alternative Fuel ◽  
Air Gap ◽  
The Body ◽  
Injection Timing ◽  
Positive Trend ◽  
Piston Crown ◽  
Karanja Oil

The drawbacks associated with bio-fuels can be minimized by making modifications to combustion chamber. Modification of combustion chamber is achieved by providing an air gap in between the crown and the body of the piston with the top crown made of low thermal conductivity material. Experimentation is carried on a diesel engine with brass as piston crown material and karanja as test fuel, which is found to be a better alternative fuel based on the tests carried out prior to modification. Investigations are carried out on the performance of the engine with modified combustion chamber consisting of air gap insulated piston with 2 mm air gap with brass crown when fuelled with karanja oil. Comparative studies are made between the two configurations of engine with and without modification at an injection timing of 29obTDC. Performance, heat balance and emission plots are made with respect to brake power. Fuel consumption increased with modification. The mechanical and volumetric efficiencies are similar in both the cases. Indicated and brake thermal efficiencies got reduced with modification. But, it is good to see that HC and CO emissions are showing positive trend. Thus, the present investigation hints the possibility of improvements while making piston modification and providing air gap insulation.

Evaluation of new technologies and materials for printed circuit boards with improved heat dissipation properties

Circuit World ◽  
2016 ◽  
Vol 42 (1) ◽  
pp. 32-36 ◽  
Author(s):  
Michal Baszynski ◽  
Edward Ramotowski ◽  
Dariusz Ostaszewski ◽  
Tomasz Klej ◽  
Mariusz Wojcik ◽  
...  
Keyword(s):  
Thermal Properties ◽  
Printed Circuit Boards ◽  
Heat Dissipation ◽  
Printed Circuit Board ◽  
New Technologies ◽  
Electronic Device ◽  
Circuit Board ◽  
New Materials ◽  
Content Type ◽  
Printed Circuit

Purpose – The purpose of this paper is to evaluate thermal properties of printed circuit board (PCB) made with use of new materials and technologies. Design/methodology/approach – Four PCBs with the same layout but made with use of different materials and technologies have been investigated using thermal camera to compare their thermal properties. Findings – The results show how important the thermal properties of PCBs are for providing effective heat dissipation, and how a simple alteration to the design can help to improve the thermal performance of electronic device. Proper layout, new materials and technologies of PCB manufacturing can significantly reduce the temperature of electronic components resulting in higher reliability of electronic and power electronic devices. Originality/value – This paper shows the advantages of new technologies and materials in PCB thermal management.

The Engineering Characteristics of Snow Skis—Part 1: Static Bending and Torsional Characteristics

1975 ◽  
Vol 97 (1) ◽  
pp. 131-137 ◽  
Author(s):  
A. Deak ◽  
J. Jorgensen ◽  
J. Vagners
Keyword(s):  
Experimental Studies ◽  
Beam Theory ◽  
Experimental Techniques ◽  
Experimental Setup ◽  
New Materials ◽  
Engineering Characteristics ◽  
Analytical Results ◽  
Geometric Arrangements

This paper presents the results of analytical and experimental studies of static bending and torsional characteristics of snow skis. The purpose of the work is to develop analytical and experimental techniques that would be useful to the ski designer who must continually explore the applicability of new materials and geometric arrangements to snow ski construction. A brief review of composite shallow beam theory is presented in a form directly applicable to ski analysis. The experimental setup to verify the analytical results is described.

Blood calcium for eczema

1935 ◽  
Vol 31 (6) ◽  
pp. 726-734
Author(s):  
N. N. Yasnitsky ◽  
Ts. D. Elina
Keyword(s):  
Practical Importance ◽  
Experimental Studies ◽  
Controversial Issue ◽  
Scientific Interest ◽  
Blood Calcium ◽  
Great Practical Importance

One of the urgent problems of modern dermatology, which are of deep scientific interest and are of extremely great practical importance, is the complex and controversial issue of the etiology of eczema. However, despite the colossal literature, despite a number of detailed experimental studies, the main and deep contradictions of representatives of the main dermatological schools on the nature of eczema remain unresolved.

Late Stage Decomposition of Embalmed Cadavers

2021 ◽  
Vol 2 (1) ◽  
Author(s):  
Pilar Mata Tutor ◽  
Catherine Villoria Rojas ◽  
María Benito Sánchez
Keyword(s):  
Soft Tissue ◽  
Late Stage ◽  
Good Condition ◽  
Experimental Studies ◽  
The Body ◽  
Health Law ◽  
External Appearance ◽  
Intrinsic Factors ◽  
Preservation Technique ◽  
Extrinsic And Intrinsic Factors

Decomposition is a natural process that begins approximately four minutes after death and continues until the body is degraded to simpler biochemical components which are gradually recycled back to the environment. This process is dependent on extrinsic and intrinsic factors. Embalming is a chemical preservation technique that aims to preserve the external appearance of the body in good condition for an indeterminate period. In Spain, there is a lack of experimental studies carried out to analyse the variables that affect decomposition in embalmed bodies, therefore, in accordance with the conclusions reached by previous authors, it is hypothesised that embalmed bodies show quantifiable characteristics during the late stage decomposition which distinguish them from control, unembalmed, cadavers. An anthropological and statistical analysis was performed on 14 individuals from Cementerio Sur de Madrid exhumed after ten years according to the Mortuary Health Law of the Autonomous Region of Madrid. The preliminary results obtained showed that there is a qualitative and statistically significant relationship between the variables evaluated, being the presence or absence of soft tissue the most notable difference. The mortuary or thanatopraxy treatments performed before the burial and the microenvironmental conditions of the burial positively influence the soft tissue preservation on embalmed bodies. These results contribute to the understanding about the decomposition rate of an embalmed cadavers in cemeteries, and the related extrinsic variables.

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