scholarly journals Analysis of raster imprints parameters on the basis of models and experimental research

2020 ◽  
Author(s):  
Bohdan Durnyak ◽  
◽  
Mikola Lutskiv ◽  
Georgij Petriaszwili ◽  
Petro Shepita ◽  
...  
Keyword(s):  
Optical Density ◽  
Experimental Research ◽  
Experimental Studies ◽  
Structural Scheme ◽  
Integral Density ◽  
Solid Area

Structural scheme of models for determining the integral density of raster scale of an imprint, raster tone in percentage, optical density of scales on the basis of the measured optical density of the solid area and other characteristics have been worked out. The results of imitation design in the form of characteristics for different parameters have been provided. Optical density of raster scales obtained on the models has been found out to be quite similar to the results of experimental studies.

Results of an experimental study of hydrogel drainage containing ranibizumab in antiglaucoma operations

2021 ◽  
pp. 63-67
Author(s):  
I.I. Khusnitdinov ◽  
Keyword(s):  
Experimental Study ◽  
Hyaluronic Acid ◽  
Key Words ◽  
Experimental Research ◽  
Experimental Studies ◽  
Glaucoma Surgery ◽  
Control Group ◽  
Morphological Studies

Purpose. Еxperimental substantiation of the effectiveness of biocompatible biodegradable hydrogels based on hyaluronic acid and chitosan succinate as a carrier of ranibizumab in antiglaucoma operations. Material and methods. Hydrogel drainage (HD) was obtained immediately before surgery. A solution of ranibizumab (0.23 ml) was mixed with a solution of hyaluronic acid dialdehyde (0.5 ml), then a solution of chitosan succinate (0.5 ml) was added. Experimental studies were performed in 12 (12 eyes) healthy rabbits. The first group consisted of 6 eyes – 0.187 ml of ranibizumab per 1 ml of gel. In the control group, HD was used intraoperatively without the addition of ranibizumab (6 eyes). Morphological studies were performed on 7th, 21st, and 42nd days. Results. In experimental studies in vitro and in vivo, it was proved that ranibizumab, administered as a part of 0.1 ml of hydrogel drainage in the antiglaucoma surgery area is released within 3 weeks and suppresses vascularization, scarring of the operating area, and preserves the intrascleral cavity. The optimal concentration of ranibizumab was selected-0.02 ml in 0.1 ml of gel. Conclusion. The safety and effectiveness of the use of hydrogel drainage with ranibizumab based on hyaluronic acid dialdehyde and chitosan succinate in anti-glaucoma operations has been proven. Key words: experimental research, hydrogel drainage, ranibizumab, glaucoma surgery.

scholarly journals Validity of a frustration-induction procedure

2007 ◽  
Vol 30 (1) ◽  
pp. 47-49 ◽  
Author(s):  
Elaine Henna ◽  
Monica L Zilberman ◽  
Valentim Gentil ◽  
Clarice Gorenstein
Keyword(s):  
Visual Analogue Scale ◽  
Experimental Research ◽  
Research Method ◽  
Analogue Scale ◽  
Experimental Studies ◽  
Normal Subjects ◽  
Induction Procedure ◽  
Overt Behavior ◽  
Before And After

OBJECTIVE: To test a reliable and easily administered frustration-induction procedure for experimental research. METHOD: One hundred volunteers (81 women, mean age ± SD 34.2 ± 8 years) physically and psychiatrically healthy submitted to the frustration induction procedure were prevented from reaching reward level scores. Subjective aggressiveness feelings related to frustration were self-rated in a 13-item visual analogue scale before and after the procedure. RESULTS: Significant increases in aggressiveness-related feelings were detected in 12 of the 13 items. This was consistent with the observed overt behavior of the subjects during the task. CONCLUSIONS: The frustration-induction procedure is a simple, easy to administer frustration-induction procedure that can be used in experimental studies in normal subjects.

scholarly journals Experimental research on processing incomplete spherical surfaces of machine parts

2021 ◽  
Vol 346 ◽  
pp. 01031
Author(s):  
Andrei Katunin ◽  
Mikhail Burnashov ◽  
Anton Tryastsin ◽  
Alexander Edapin
Keyword(s):  
Surface Roughness ◽  
Experimental Research ◽  
Experimental Studies ◽  
Spherical Surfaces ◽  
Machine Parts ◽  
Ball Joints

Improving the durability and reliability of such components as ball joints of cars is very important. The article presents experimental studies to determine surface roughness of incomplete spherical surfaces of machine parts.

Experimental research in expatriation and its challenges: A literature review and recommendations

2020 ◽  
Vol 34 (2) ◽  
pp. 252-283
Author(s):  
Daniela Noethen ◽  
Rocio Alcazar
Keyword(s):  
Literature Review ◽  
Experimental Research ◽  
Cultural Psychology ◽  
Experimental Studies ◽  
Data Access ◽  
Past Research ◽  
Randomized Experiments ◽  
Critical Issues ◽  
Expatriate Management ◽  
The Many

Via a systematic literature review, this article draws attention to the alarming scarcity of experimental studies and the ensuing shortness of evidence for causality in the field of expatriate management. Only 17 articles could be identified, published over more than 20 years, which utilize randomized experiments or quasi-experiments on topics of expatriation. Moreover, these articles show specific patterns, such as dealing exclusively with pre-departure and on-assignment issues, or, in their majority, sampling individuals who interact with expatriates rather than expatriates themselves. This lack of experimental studies is problematic, as it is difficult to establish causality between different variables without conducting experimental studies. Yet many critical issues in expatriation are precisely questions of causality. Hence, in this article, we provide resources to help move the expatriation field toward a more balanced use of different research methodologies and, thus, a greater understanding of the many relationships uncovered in past research. First, we identify four main challenges unique to conducting experimental research in the context of expatriation: Challenging data access, global sample dispersion, restricted manipulability of variables, and cultural boundedness of constructs and interpretations. Second, we provide strategies to overcome these challenges, based on studies included in the review as well as taking ideas from neighboring fields such as cross-cultural psychology. The article concludes with a discussion of how experimental research can take the field of expatriation forward and improve the decision-making process of practitioners managing international assignees.

APPLICATION OF THE METHOD OF PHOTOMETRY IN EXPERIMENTAL RESEARCH OF THE SOIL REINFORCED DESIGNS

2014 ◽  
Vol 2 (3) ◽  
pp. 128-132
Author(s):  
Татьяна Кашарина ◽  
Tatyana Kasharina ◽  
А Приходько ◽  
A Prikhodko
Keyword(s):  
Experimental Research ◽  
Experimental Studies

The paper describes the experimental studies developed by the author of a new constructive solutions of the soil reinforced structures using the method of photometry

scholarly journals Experimental research of vehicle traction properties for reconstruction of traffic accidents

2018 ◽  
Vol 157 ◽  
pp. 05005 ◽  
Author(s):  
Marian Dudziak ◽  
Andrzej Lewandowski ◽  
Michał Śledziński
Keyword(s):  
Experimental Research ◽  
Road Safety ◽  
Traffic Accidents ◽  
Research Team ◽  
Motor Vehicle ◽  
Experimental Studies ◽  
Cognitive Factor ◽  
Road Accidents ◽  
Full Reconstruction

In order to broaden the database of motor vehicle traction properties in unusual conditions, the research team has performed experimental studies: on wet and snow-covered surfaces. Tests of vehicles equipped with winter tyres with non-skid snow chains have been performed on snow-covered surfaces. It has been shown that on snowy surface chains affect vehicle traction properties, mostly during acceleration. They increase the rate of acceleration up to 50% compared to a vehicle with winter tyres without chains. The results of the performed research can be the basis for the full reconstruction of road accidents under these conditions. Knowledge of traction properties of cars in difficult and unusual conditions is an important cognitive factor and serves to improve road safety.

Recent Research on Thermal Fatigue of Composite Elements of Transport Means

2013 ◽  
Vol 588 ◽  
pp. 243-248 ◽  
Author(s):  
Andrzej Katunin ◽  
Wojciech Moczulski
Keyword(s):  
Experimental Research ◽  
Thermal Fatigue ◽  
Mechanical Energy ◽  
Experimental Studies ◽  
The Self ◽  
Heating Effect ◽  
Engineering Applications ◽  
Hysteretic Behaviour ◽  
Fatigue Process ◽  
Self Heating

Thermal fatigue occurred in many engineering constructions made of polymeric composites subjected to the intensive loading and vibrations. During this process the mechanical energy is dissipated in the form of heat due to the hysteretic behaviour of the material, which introduces the self-heating effect. In some cases the self-heating effect dominates the fatigue process and intensifies much structural degradation of composite elements. The paper presented a survey of engineering applications in which the self-heating effect and thermal fatigue occurred and recent advances in theoretical and experimental research in this area. Selected results of experimental studies were presented and discussed.

scholarly journals EXPERIMENTAL RESEARCH METHODOLOGY OF ELEMENTS WITH COMPOSITE FITTINGS WITH BENDING AT PRIORITY SECTIONS

2020 ◽  
Vol 5 (9) ◽  
pp. 8-14
Author(s):  
S. Merkulov ◽  
E. Akimov
Keyword(s):  
Experimental Study ◽  
Crack Resistance ◽  
Experimental Research ◽  
Research Methodology ◽  
Experimental Studies ◽  
Strain Condition ◽  
Joint Operation ◽  
Composite Rod ◽  
Concrete Elements ◽  
Composite Reinforcement

The inability of using this type of reinforcement as a cross on the support sections of the bent elements is one of the reasons limiting the wide use of composite rod reinforcement. To ensure the strength of bent elements along inclined sections, it is proposed to bend the rods of the working longitudinal working reinforcement, and geometric parameters of bends for some types of composite reinforcement are proposed, depending on the diameter of the rod. To develop a method for calculating the strength of inclined sections, it is necessary to develop experimentally justified prerequisites that take into account the features of joint operation of composite rod reinforcement in inclined sections. The article offers a method for experimental study of the strength and crack resistance of reinforced concrete bending elements with non-metallic composite rod reinforcement, including the design of prototypes, the installation scheme of devices during testing. The developed method allows to determine the parameters of strength and crack resistance of inclined sections of bent elements. The tasks of experimental studies of concrete elements reinforced with composite rod reinforcement are to determine the regularity of changes in the stress-strain condition of concrete and composite reinforcement during loading, to determine the nature of the destruction of elements along the inclined section, to obtain data on the strength and crack resistance of elements.

scholarly journals A Practical Guide to Using Digital Games as an Experiment Stimulus

2014 ◽  
Vol 1 (2) ◽  
Author(s):  
Simon Järvelä ◽  
Inger Ekman ◽  
J. Matias Kivikangas ◽  
Niklas Ravaja
Keyword(s):  
Data Collection ◽  
Experimental Research ◽  
Experimental Studies ◽  
Reliability And Validity ◽  
Digital Games ◽  
Task Type ◽  
Media Content ◽  
Data Segmentation ◽  
Rich Media

Digital games offer rich media content and engaging action, accessible individually or in groups collaborating or competing against each other. This makes them promising for use as a stimulus in research settings. This paper examines the advantages and challenges of using games in experimental research with particular focus on strict stimulus control through the following four areas: (1) matching and regulating task type, (2) data segmentation and event coding, (3) compatibility between participants, and (4) planning and conducting data collection. This contribution provides a breakdown of the steps necessary for using a digital game in experimental studies, along with a checklist for researchers illustrating variables that potentially affect the reliability and validity of experiments. We also offer a study example to illustrate how these considerations apply to practice. The aim is to provide support to researchers planning and conducting empirical experiments involving games, and also to those evaluating the works of others.

scholarly journals EXPERIMENTAL RESEARCH OF IMPACT NOISE STRUCTURE FLOORS WITH CHANGING THICKNESS OF MATERIALS AND SIZE FILLER

2021 ◽  
Vol 30 (1) ◽  
pp. 6-11
Author(s):  
I. Babii ◽  
◽  
L. Kucherenko ◽  
Ye. Kalchenia ◽  
◽  
...  
Keyword(s):  
Experimental Research ◽  
Experimental Studies ◽  
Expanded Polystyrene ◽  
Sound Insulation ◽  
Material Thickness ◽  
Impact Noise ◽  
Noise Structure ◽  
Impact Protection ◽  
Insulation Performance

This paper considers experimental studies of the sound insulation structure of the floor to determine the effect of material thickness, polystyrene concrete and cement-sand screed, as well as the size of the aggregate (polystyrene granules) in polystyrene concrete on the sound insulation properties of floor construction, namely impact protection. It was determined that the thickness of the cement-sand screed in no way affects the improvement of impact noise. Due to the reduction of the size of the aggregate (expanded polystyrene granule) in polystyrene concrete, it was possible to reduce the thickness of the structure, which did not affect the insulation performance of impact noise.

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