Educational software “Virtual laboratory works on the course of “Heat supply of forest enterprises”

2020 ◽  
pp. 54-61
Author(s):  
S. N. Blinov ◽  
A. A. Orlov
Keyword(s):  
Computer Program ◽  
Heat Supply ◽  
Educational Software ◽  
Practical Experience ◽  
Virtual Laboratory ◽  
Laboratory Equipment ◽  
Wear And Tear ◽  
Educational Computer ◽  
Forest Enterprises

One of the key factors in providing a crisis-resistant form of performing laboratory classes in universities in distance mode is educational computer programs in the form of virtual laboratory works. Such software provides students to get proper practical experience working with technological equipment in absence of direct contact with the teacher and real laboratory units. They are also an alternative to real physical laboratory units and can be used by students in event of physical wear and tear of laboratory equipment or its complete absence. The article presents an educational computer program designed for laboratory works on five virtual laboratory units to the discipline “Heat supply of forest enterprises” for students to master materials on the following topics: “Determination of fuel humidity”; “Determination of the yield of volatile substances and coke”; “Determination of fuel ash content”; “Determination of the heat of combustion of solid fuel”; “Analysis of flue gases”. The authors showed the principle of performing all virtual laboratory works on the example of one laboratory work, identified the advantages of presented computer program and indicated high significance and efficiency of its use. The developed program is successfully used by students of Reshetnev Siberian State University of Science and Technology, allows you to hold laboratory works in distance mode and reduce the time for their implementation by accelerating the simulated processes.

CHROMOGENIC ENDOTOXIN ASSAYS. - FURTHER METHOD DEVELOPMENT AND PRACTICAL EXPERIENCE

1987 ◽  
Author(s):  
K Nilsson ◽  
P Friberqer
Keyword(s):  
Method Development ◽  
Practical Experience ◽  
Reaction Conditions ◽  
Laboratory Equipment ◽  
Reagent Cost ◽  
Considerable Work ◽  
Almost All ◽  
Optimal Reaction ◽  
Quantitative Procedure

A kit for the determination of endotoxin by using Lumulus lysate (LAL) and a chromogenic substrate has now been available for three years. Here we will summarize the present status concerning its usefulness in the control of parenteral drugs, in hygienic control and in clinical diagnosis.The wide variation of uses, demands considerable work for method adaptation to the various types of specimen and laboratory. Almost all samples have to be pretreated to become compatible with the reagents in the assay. It has also been found to be important to consider variousdemands depending on the number of samples, how fast the answer is wanted, simplicity and accuracy of the assay that is needed as well as equipment available. In some cases a single screening test is required. Then a tube with 100 pi of LAL reagent can be taken from the freezer. The other extreme is the determination of hundreds of samples in each series. Then microplates and suitable readers can be of great help. Several other procedures used on special occasions allowing e.g. wide assay range or low reagent cost will also be presented.Manual and microplate procedures have been found suitable and can be made safe regarding contamination and losses of endotoxin. Single stage and micro methods have been tested and found to work. Data concerning material and laboratory equipment have been collected and are now available.By using a quantitative procedure forthe determination of the small amounts of endotoxin present in most samples, it has been possible to find optimal reaction conditions and to trace various kindsof errors. Procedures for method controland trouble shooting are also suggested.

A general computer program for the extended plate overlap algorithm

1978 ◽  
Vol 48 ◽  
pp. 287-293 ◽  
Author(s):  
Chr. de Vegt ◽  
E. Ebner ◽  
K. von der Heide
Keyword(s):  
Computer Program ◽  
Simultaneous Determination ◽  
General Computer Program ◽  
General Computer

In contrast to the adjustment of single plates a block adjustment is a simultaneous determination of all unknowns associated with many overlapping plates (star positions and plate constants etc. ) by one large adjustment. This plate overlap technique was introduced by Eichhorn and reviewed by Googe et. al. The author now has developed a set of computer programmes which allows the adjustment of any set of contemporaneous overlapping plates. There is in principle no limit for the number of plates, the number of stars, the number of individual plate constants for each plate, and for the overlapping factor.

Basic set of experiments for determination of mechanical properties of sand

2014 ◽  
Vol 62 (1) ◽  
pp. 129-137
Author(s):  
A. Sawicki ◽  
J. Mierczyński
Keyword(s):  
Mechanical Properties ◽  
Soil Mechanics ◽  
Physical And Mechanical Properties ◽  
Local Strain ◽  
Initial State ◽  
Laboratory Equipment ◽  
Additional Information ◽  
Basic Set ◽  
Initial Anisotropy

Abstract A basic set of experiments for the determination of mechanical properties of sands is described. This includes the determination of basic physical and mechanical properties, as conventionally applied in soil mechanics, as well as some additional experiments, which provide further information on mechanical properties of granular soils. These additional experiments allow for determination of steady state and instability lines, stress-strain relations for isotropic loading and pure shearing, and simple cyclic shearing tests. Unconventional oedometric experiments are also presented. Necessary laboratory equipment is described, which includes a triaxial apparatus equipped with local strain gauges, an oedometer capable of measuring lateral stresses and a simple cyclic shearing apparatus. The above experiments provide additional information on soil’s properties, which is useful in studying the following phenomena: pre-failure deformations of sand including cyclic loading compaction, pore-pressure generation and liquefaction, both static and caused by cyclic loadings, the effect of sand initial anisotropy and various instabilities. An important feature of the experiments described is that they make it possible to determine the initial state of sand, defined as either contractive or dilative. Experimental results for the “Gdynia” model sand are shown.

Comparative assessment of informational content of the equations of F.P. Hadlock and the computer program of V.N. Demidov in determination of term of gestation and fetal weight in the III trimester of gestation

2017 ◽  
Author(s):  
E.A. Derkach , O.I. Guseva
Keyword(s):  
Computer Program ◽  
High Precision ◽  
Gestational Age ◽  
Computer Programs ◽  
Comparative Assessment ◽  
Fetal Weight ◽  
Informational Content ◽  
Third Trimester ◽  
The Third

Objectives: to compare the accuracy of equations F.P. Hadlock and computer programs by V.N. Demidov in determining gestational age and fetal weight in the third trimester of gestation. Materials: 328 patients in terms 36–42 weeks of gestation are examined. Ultrasonography was performed in 0–5 days prior to childbirth. Results: it is established that the average mistake in determination of term of pregnancy when using the equation of F.P. Hadlock made 12,5 days, the computer program of V.N. Demidov – 4,4 days (distinction 2,8 times). The mistake within 4 days, when using the equation of F.P. Hadlock has met on average in 23,1 % of observations, the computer program of V.N. Demidov — 65,9 % (difference in 2,9 times). The mistake more than 10 days, took place respectively in 51,7 and 8,2 % (distinction by 6,3 times). At a comparative assessment of size of a mistake in determination of fetal mass it is established that when using the equation of F.P. Hadlock it has averaged 281,0 g, at application of the computer program of V.N. Demidov — 182,5 g (distinction of 54 %). The small mistake in the mass of a fetus which isn't exceeding 200 g at application of the equation of F.P. Hadlock has met in 48,1 % of cases and the computer program of V.N. Demidov — 64,0 % (distinction of 33,1 %). The mistake exceeding 500 g has been stated in 18 % (F.P. Hadlock) and 4,3 % (V.N. Demidov) respectively (distinction 4,2 times). Conclusions: the computer program of V.N. Demidov has high precision in determination of term of a gestation and mass of a fetus in the III pregnancy.

Reynolds-averaged Navier–Stokes simulation of hydrofoil effects on hydrodynamic coefficients of a catamaran in forced oscillation

2016 ◽  
Vol 231 (2) ◽  
pp. 364-383
Author(s):  
Amin Najafi ◽  
Mohammad Saeed Seif
Keyword(s):  
High Speed ◽  
Experimental Approach ◽  
Navier Stokes ◽  
Hydrodynamic Coefficients ◽  
Laboratory Equipment ◽  
Factors Affecting ◽  
High Frequencies ◽  
Frequency Independent ◽  
Reynolds Averaged Navier Stokes

Determination of high-speed crafts’ hydrodynamic coefficients will help to analyze the dynamics of these kinds of vessels and the factors affecting their dynamic stabilities. Also, it can be useful and effective in controlling the vessel instabilities. The main purpose of this study is to determine the coefficients of longitudinal motions of a planing catamaran with and without a hydrofoil using Reynolds-averaged Navier–Stokes method to evaluate the foil effects on them. Determination of hydrodynamic coefficients by experimental approach is costly and requires meticulous laboratory equipment; therefore, utilizing the numerical methods and developing a virtual laboratory seem highly efficient. In this study, the numerical results for hydrodynamic coefficients of a high-speed craft are verified against Troesch’s experimental results. In the following, after determination of hydrodynamic coefficients of a planing catamaran with and without foil, the foil effects on its hydrodynamic coefficients are evaluated. The results indicate that most of the coefficients are frequency-independent especially at high frequencies.

scholarly journals Interlaboratory comparison of fig (Ficus carica L.) microsatellite genotyping data and determination of reference alleles

2018 ◽  
Vol 111 (1) ◽  
pp. 143
Author(s):  
Matjaž HLADNIK ◽  
Jernej JAKŠE ◽  
Bouchaib KHADARI ◽  
Sylvain SANTONI ◽  
Dunja BANDELJ
Keyword(s):  
Interlaboratory Comparison ◽  
Ficus Carica ◽  
Reference Allele ◽  
Discrimination Power ◽  
Laboratory Equipment ◽  
Allele Dropout ◽  
Pcr Technology ◽  
Touchdown Pcr ◽  
Tail Pcr

<p>Microsatellites have been identified as the marker of choice in plant genotyping projects. However, due to length discrepancies obtained between different laboratories for the same allele, interlaboratory comparison of fingerprinting results is often a difficult task. The objectives of this study were to compare genotyping results of two laboratories, to evaluate genetic parameters of microsatellite markers and to determine reference allele sizes for fig cultivars from the Istrian peninsula.</p><p>Genotyping results of ninety fig (<em>Ficus carica</em> L.) accessions were comparable between the laboratories despite differences observed when comparing electropherograms of different capillary electrophoresis systems. Differences in lengths of the same alleles were detected due to different PCR methods and laboratory equipment, but the distances between alleles of the same locus were preserved. However, locus FSYC01 exhibited one allele dropout which led to misidentification of 28 heterozygotes as homozygote individuals suggesting this locus as unreliable. Allele dropout was assigned to the tail PCR technology or to a touchdown PCR protocol.</p><p>Genotypes of twenty-four reference cultivars from the Istrian peninsula were confirmed by both laboratories. These results will contribute to the usage of markers with greater reliability, discrimination power and consequently, to more reliable standardization with other fig genotyping projects.</p>

scholarly journals Experimental determination of the efficiency of the solar collector integrated into the light transparent building facade

2019 ◽  
Vol 14 (2) ◽  
pp. 31-38
Author(s):  
Vasyl Zhelykh ◽  
Peter Kapalo ◽  
Stepan Shapoval ◽  
Iryna Venhryn ◽  
Khrystyna Kozak
Keyword(s):  
Renewable Energy ◽  
Solar Collector ◽  
Heat Supply ◽  
Energy Systems ◽  
Heat Supply System ◽  
Optimal Operation ◽  
Supply System ◽  
Energy Sources ◽  
Further Development

AbstractOne of the most promising energy sources is solar energy, which is confirmed by the growth in the development of renewable energy for European countries. The main goal of research is to design and implement the latest energy systems for passive buildings using renewable energy. In this paper is documented the optimal operation stages of the solar heat supply system were investigated with recommendations for further development of the design and construction of passive buildings in Ukraine South.

scholarly journals KAJIAN PENGGUNAAN LABORATORIUM VIRTUAL BERBASIS SIMULASI SEBAGAI UPAYA MENGATASI KETIDAK-SEDIAAN LABORATORIUM

2017 ◽  
Vol 8 (2) ◽  
pp. 323-330
Author(s):  
Rina Mirdayanti ◽  
Murni
Keyword(s):  
The Other ◽  
Practical Work ◽  
Virtual Laboratory ◽  
Research Use ◽  
Laboratory Equipment ◽  
The Real ◽  
Is Research ◽  
Virtual Lab ◽  
Basic Physics ◽  
The Right

The ability to use practical tools for students is a must in the basic Physics practical courses. In fact often happens is not adequate for laboratory tersediannya the implementation of practical, so that the process of teaching being constrained. To like the other problems like this needed a media device such as a software-based virtual lab simulations that can be used in the teaching of basic physics. This research aims to analyze the exact effort that can be done to overcome the lack of sedian laboratory equipment. This type of research is research use approach to the study of literature. The expected results of this literature is the emergence of an understanding of basic physics lab course in conducting with virtual laboratory as a means to address the issue of sedian in the real Labs. This virtual lab so that it can be the right solution for students and teachers in carrying out practical work.   Abstrak Kemampuan menggunakan alat-alat praktikum bagi siswa merupakan suatu keharusan dalam mata pelajaran Fisika Dasar. Pada kenyataannya yang sering terjadi adalah tidak tersediannya laboratorium yang memadai untuk pelaksanaan praktikum, sehingga proses praktikum menjadi terkendala. Untuk mensiasati permasalahan seperti ini dibutuhkan sebuah media seperti perangkat software laboratorium virtual berbasis simulasi yang bisa digunakan dalam praktikum  fisika dasar. Penelitian ini bertujuan untuk menganalisis upaya yang tepat yang dapat dilakukan untuk mengatasi ketidak-sedian  peralatan  laboratorium. Jenis penelitian yang gunakan adalah penelitian dengan pendekatan studi literatur. Hasil yang diharapkan dari literatur ini adalah munculnya pemahaman dalam melaksanakan praktikum fisika dasar dengan laboratorium virtual sebagai sarana untuk mengatasi persoalan ketidak-sedian laboratorium secara nyata. Sehingga laboratorium virtual ini dapat menjadi solusi yang tepat bagi siswa dan guru dalam melaksanakan praktikum. Kata kunci: Praktikum, Ilmu Sains, Laboratorium Virtual, Pemahaman Konsep

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