Express-Method for Determination the Fibrous Materials Resistance to Bending

2019 ◽  
Vol 945 ◽  
pp. 407-411 ◽  
Author(s):  
I.A. Sheromova ◽  
G.P. Starkova ◽  
A.S. Zheleznyakov
Keyword(s):  
Universal Method ◽  
Fibrous Materials ◽  
Electronic Database ◽  
Natural Oscillations ◽  
The Subject ◽  
Properties Of Materials ◽  
Methodological Approaches ◽  
Materials Used ◽  
Express Methods

The object of research of the article is the characteristics of mechanical properties of fibrous systems under the bending deformation, and the subject is the method of determination of the resistance to bending. The aim of the work is to develop a new universal method for evaluating the resistance of fibrous materials to bending, including, among other things, the possibility of forming an electronic database on the characteristic properties of materials. To achieve this goal, a set of problems related to the analysis of existing methodological approaches and technical means, the rationale for possible solutions to the problem posed, and the development of a new patentable method for evaluating the materials’ resistance to bending, have been solved in the research. In the course of the project, a study was developed of the required characteristics for textile and leather-fur materials used for the manufacture of garments. The method is based on the use of natural oscillations frequencies of the material as an informative parameter of their resistance to bending. The method belongs to the class of express methods and provides an opportunity to create an electronic database on the properties of materials online. The approbation of the proposed solution by comparing the estimates obtained with the results of studies obtained on the basis of a standardized method (the method of the console), showed sufficient accuracy and the possibility of practical application of the developed method.

Development of Methodological Support for the Study of Materials’ Air Permeability

2019 ◽  
Vol 945 ◽  
pp. 938-943
Author(s):  
I.A. Sheromova ◽  
A.S. Zheleznyakov
Keyword(s):  
Air Permeability ◽  
Control Procedure ◽  
Fibrous Materials ◽  
Additional Advantage ◽  
Textile Materials ◽  
The Subject ◽  
Properties Of Materials ◽  
Materials Used ◽  
Different Levels

The object of research of the article is the methodological and technical support for the process of studying the characteristics of ergonomic properties of materials used in the manufacture of garments, and the subject – the method for the determination of textile materials’ air permeability. The aim of the work is to simplify the method for determination of fibrous materials’ air permeability and to expand the technological capabilities of its instrument base while increasing the flexibility of the control procedure. To achieve this goal, the tasks related to the analysis of existing methods and technical means, and the development of a new method for determining the air permeability of textile materials were solved. The principal difference in the developed method is the possibility to conduct studies on the air permeability of textile materials at different levels of pressure drop on both sides of the sample, and not only in accordance with the standardized requirements. An additional advantage of the method is the possibility to create an online electronic database on the properties of materials. In comparison with analogues, the proposed method for the determination of air permeability ensures the accuracy and reliability of the data obtained, as well as facilitates the testing process by automation.

The Simulation of Heat and Vapour Transfer Trough Fibrous Materials

2010 ◽  
Vol 297-301 ◽  
pp. 1205-1209 ◽  
Author(s):  
Ivana Salopek Čubrić ◽  
Zenun Skenderi
Keyword(s):  
Structural Parameters ◽  
Basic Structure ◽  
Raw Material ◽  
Fibrous Materials ◽  
Vapour Permeability ◽  
Physiological Processes ◽  
Repeat Units ◽  
Materials Used

The heat and water vapour transmitting properties of fibrous materials are important factors that affect the clothing's comfort as well as the quality of special functional clothing that is worn in extreme environmental conditions. The paper introduces advanced system for the simulation of physiological processes that appear next to the human skin. Its use enables the measurement of heat and vapour transfer trough fibrous structures, as well as determination of vapour permeability and permeability index. The experiments reported here refer to the measurement of a number of fibrous materials used for the next-to-skin wear. For the measurement have been produced materials that differ either in their structure or raw material in order to observe the influences of different parameters to the transfer properties. The transfer trough fibrous materials is mainly affected by its structure that comprises of a repeat units with cellular geometry containing air pores, yarns that form basic structure and intersection points of two or more yarns. Therefore, the structure of materials is also investigated and described by means of fabric moduli. Dynamics of heat and vapour transfer is observed through the experimentally obtained data and the influence of a number of structural parameters is discussed. The statistical methods are used to qualify the effects of investigated variables on the heat and vapour resistance.

Determination of Teacher Candidates’ Opinions About The Efficiency of Virtual Classes Used in Distance Education

2016 ◽  
Vol 6 (2) ◽  
pp. 143
Author(s):  
Hafize Keser ◽  
Huseyin Bicen ◽  
Semih Caliskan
Keyword(s):  
Distance Education ◽  
Teacher Candidates ◽  
Virtual Classroom ◽  
Spring Semester ◽  
Virtual Class ◽  
Virtual Classes ◽  
The Subject ◽  
Materials Used ◽  
Academic Year

This study was aimed to determine the teacher candidates’ opinions about the efficiency of virtual classes. 173 voluntary teacher candidates who receive distance education at Near East University participated in this research. This research was conducted in the spring semester of 2014-2015 academic year. The results of 5-point Likert-type Scale which was developed by the researchers were analyzed with SPSS program. When the results of the research were analyzed, it was revealed that teacher candidates who receive distance education reported that, virtual classes are effective in learning, being in the virtual classes at the same time with their teachers increase the students’ interests in the lecture, the materials used in the lectures are more effective for students to understand the subject, the students get opinions from their classmates by making their presentations through file sharing in virtual class setting and this leads to a significant contribution to their learning. Keywords: distance learning, virtual classroom, bigbluebutton 

Determination of teacher candidates’ opinions about the efficiency of virtual classes used in distance education

2016 ◽  
Vol 6 (2) ◽  
Author(s):  
Hafize Keser ◽  
Huseyin Bicen ◽  
Semih Caliskan
Keyword(s):  
Distance Education ◽  
Teacher Candidates ◽  
Virtual Classroom ◽  
Spring Semester ◽  
Virtual Class ◽  
Virtual Classes ◽  
The Subject ◽  
Materials Used ◽  
Academic Year

This study was aimed to determine the teacher candidates’ opinions about the efficiency of virtual classes. 173 voluntary teacher candidates who receive distance education at Near East University participated in this research. This research was conducted in the spring semester of 2014-2015 academic year. The results of 5-point Likert-type Scale which was developed by the researchers were analyzed with SPSS program. When the results of the research were analyzed, it was revealed that teacher candidates who receive distance education reported that, virtual classes are effective in learning, being in the virtual classes at the same time with their teachers increase the students’ interests in the lecture, the materials used in the lectures are more effective for students to understand the subject, the students get opinions from their classmates by making their presentations through file sharing in virtual class setting and this leads to a significant contribution to their learning.Keywords: distance learning, virtual classroom, bigbluebutton

Measurement System for Determination of Supercapacitor Equivalent Parameters

2013 ◽  
Vol 20 (4) ◽  
pp. 581-590 ◽  
Author(s):  
Ryszard Kopka ◽  
Wiesław Tarczyński
Keyword(s):  
Measurement System ◽  
Properties Of Materials ◽  
Materials Used ◽  
Measurement Capabilities

Abstract In this paper a measurement system for determination of supercapacitor equivalent parameters is proposed. Specific properties of materials used for supercapacitor construction require some advanced tools and measurement procedures to be applied during tests. The measurement system allows to measure values of equivalent parameters by both the DC and AC method whilst keeping appropriate time criteria required by this type of devices. Furthermore, in this paper the most relevant properties and measurement capabilities of the proposed system are described as well as some exemplary values of the supercapacitor equivalent parameters measured experimentally are presented.

scholarly journals Determination of mechanical properties of materials used for 3D printing

2020 ◽  
Vol 20 (2) ◽  
pp. 190-194
Author(s):  
Josef Sedlak ◽  
Josef Chladil ◽  
Martin Cerny ◽  
Ales Polzer ◽  
Matus Varhanik ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
3D Printing ◽  
Mechanical Properties Of Materials ◽  
Properties Of Materials ◽  
Materials Used

scholarly journals Evolution of Floor Construction System in Beirut (1840-1940)

2020 ◽  
Vol 3 (2) ◽  
pp. p12
Author(s):  
Jad Hammoud ◽  
Elise Abi Rached
Keyword(s):  
Architectural Design ◽  
Late Nineteenth Century ◽  
Structural Systems ◽  
Construction Techniques ◽  
French Mandate ◽  
Structural Principles ◽  
The Subject ◽  
Materials Used ◽  
Late Ottoman

This article is going to deal with the evolution of floor structural systems; traditional structural systems during the late Ottoman period and the concrete structural systems during the French mandate period in Beirut. Beyond this, natural constraint timber materials used in the late nineteenth century and the available concrete materials used in the early twentieth century can direct influence the evolution of the floor structural systems which became an integral part of architectural design and typology. Structural principles of traditional floor construction techniques will be characterized and assessed in eight case studies tracing its structural systems in terms of their evolution. The subject matter will be approached in a descriptive manner for floor structural systems and the determination of mechanical properties of timber.

scholarly journals NORMATIVE VALUE OF APPROACHES TO THE STUDY OF PROCREATION

2021 ◽  
pp. 333-341
Author(s):  
Tatiana A. Sidorova ◽  
Keyword(s):  
Social Regulation ◽  
Human Reproduction ◽  
Social Sciences And Humanities ◽  
A Value ◽  
Cultural Conditioning ◽  
Demographic Processes ◽  
The Subject ◽  
Methodological Approaches ◽  
Normative Value

The article analyzes the approaches and methods used when studying procreation, which is understood to mean human reproduction in the value-based aspects. The latest trends in childbearing are becoming the subject of not only demography but also various studies in social sciences and humanities. In scientific and mundane discourses, the term «reproduction» prevails in the designation of procreation. The concept of «procreation» is appropriate to use in the axiological approach since it contains an indication of the ways of understanding (description, cognition, designation in language and discourse) human reproduction included in the process of creation, not production, of man. The emphasis on the value-semantic determinism of procreation allows us to note the correlation what and how is studied about childbearing and the way the obtained knowledge affects reproductive aspirations and intentions. There are distinguished pronatal and antenatal orientations in the methodological approaches to the study of modern procreative processes. Procreative understanding is associated with a pronatal position in the motivation and social regulation of childbearing. The author concludes about normative value of different approaches and methods in research for procreation. Scientific discourse normalizes the perception of the latest trends in the childbearing area. The article indicates that qualitative methods in the study of procreation are in demand since they allow one to describe the dynamic and subjective moments in its phenomena and do not lay claim to the universality of the established patterns, which corresponds to the recognition of cultural conditioning and value-based dependence in demographic processes. The paper critically assesses the idea of universality of rationalization criteria in the study of childbirth, which is widespread among demographers. When proceeding from the idea of a value-based determination of procreation, it is necessary to take into account and normalize irrational factors in the motivation of childbearing.

scholarly journals ANALISIS PERHITUNGAN HARGA POKOK PRODUKSI PRODUK SPRING BED PADA PT. MASSINDO SINAR PRATAMA

2013 ◽  
Vol 8 (4) ◽  
Author(s):  
Eric Joseph Taroreh ◽  
Jantje J. Tinangon ◽  
Inggriani Elim
Keyword(s):  
Production Process ◽  
Raw Materials ◽  
Labor Costs ◽  
The Subject ◽  
Cost Of Production ◽  
Materials Used ◽  
The Cost ◽  
Direct Materials ◽  
Descriptive Method

Determination of the cost of production is an important problem in a manufacturing company where the activity is to process the raw materials into finished materials subsequently sold to consumers for a profit. Cost of production is the cost of production which has applied to all finished products are being manufactured during a certain period. This study aims to determine the calculation of the cost of production at PT. Massindo Sinar Pratama. Analyses were performed using the descriptive method in qualitative to be a method to collect data, compiled, interpreted, and analyzed so as to provide an overview of the state of the subject and the object under study is based on facts. From these results it can be seen in the production process of spring, charging based on the type and size of production resulting in a period of one month. With the charge of direct materials, direct labor costs and factory overhead costs. Direct materials used include; Foam, Cloth spring, Spriral iron, wood, and plastic legs. The imposition of direct labor costs based on rates of production units produced. Imposition of factory overhead costs to products based on the overhead costs are determined upfront.

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