scholarly journals Calculation of scopes of region of impermissible values of courses of vessels for the domain of rectangular form

2020 ◽  
Vol VIII(224) (27) ◽  
pp. 51-54
Author(s):  
А. V. Borodulin
Keyword(s):  
Rectangular Form

Multiple Frequency Tympanometry

1993 ◽  
Vol 36 (1) ◽  
pp. 178-185 ◽  
Author(s):  
Janet E. Shanks ◽  
Richard H. Wilson ◽  
Nancy K. Cambron
Keyword(s):  
Phase Angle ◽  
Phase Difference ◽  
Middle Ear ◽  
Multiple Frequency ◽  
Ear Canal ◽  
Sweep Frequency ◽  
Difference Curve ◽  
Angle Measurements ◽  
Rectangular Form ◽  
Acoustic Admittance

Three methods for compensating multiple frequency acoustic admittance measurements for ear canal volume were studied in 26 men with normal middle ear transmission systems. Peak compensated static acoustic admittance (| y |) and phase angle (ø) were calculated from sweep frequency tympanograms (226–1243 Hz in 113 Hz increments). Of the procedures used to compensate for volume in rectangular form, the ear canal pressure used to estimate volume had the largest effect on the estimate of middle ear resonance. Median resonance was 800 Hz for admittance measurements compensated at 200 daPa versus 1100 Hz for measurements compensated at –350 daPa. The remaining two methods, compensation of susceptance only versus both susceptance and conductance and compensation using the minimum volume versus separate volumes at each frequency, did not affect estimates of middle ear resonance. Estimates of middle ear resonance from compensated phase angle measurements also were compared with estimates of resonance from admittance and phase difference curves. although resonance could not be estimated from the phase difference curve, resonance estimated from the admittance difference curve agreed with the estimate from compensated phase angle.

scholarly journals Unsteady RANS Simulation of Air Distribution in a Ventilated Classroom with Numerous Jets

2019 ◽  
Vol 111 ◽  
pp. 02010
Author(s):  
Nikolay Ivanov ◽  
Marina Zasimova ◽  
Evgueni Smirnov ◽  
Alexey Abramov ◽  
Detelin Markov ◽  
...  
Keyword(s):  
Reynolds Number ◽  
Velocity Field ◽  
Flow Structure ◽  
Air Distribution ◽  
Air Velocity ◽  
3D Flow ◽  
Ansys Fluent ◽  
Test Conditions ◽  
Rectangular Form ◽  
Unsteady Rans

The study is devoted to the Unsteady Reynolds-Averaged Navies-Stokes (URANS) simulation of ventilation in an isothermal room with numerous jets supplied from ceiling diffusers. The computations of the airflow under the test conditions considered were carried out in the classroom of the Technical University of Sofia with no occupants. The room floor has a simple rectangular form, but several columns, beams, window sills, and four radiators are located inside the room that makes the geometry more complex. Air is supplied to the room through four ceiling fan coils, the Reynolds number is 2×104. Calculations were carried out using the ANSYS Fluent 18.2 software with the standard k-ε turbulence model chosen. Computational meshes of up to 33 million hexahedral cells clustered to the inlet and outlet sections were used. The main aim of the study presented is to analyze and discuss the complicated 3D flow structure in the room and to give foundation for future measurements of air velocity field in the room.

A shield for sources of rectangular-form ? radiation

Atomic Energy ◽  
1960 ◽  
Vol 6 (6) ◽  
pp. 503-506
Author(s):  
D. P. Osanov ◽  
E. E. Kovalev
Keyword(s):  
Rectangular Form

scholarly journals Analysis and Design of a New Dual Band Microstrip Patch Antenna Based on Slot Matching Y-Shaped

2014 ◽  
Vol 11 (2) ◽  
pp. 89
Author(s):  
R. Wali ◽  
S. Ghnimi ◽  
A.G. Hand ◽  
T. Razban
Keyword(s):  
Return Loss ◽  
Microstrip Patch Antenna ◽  
Dual Band ◽  
Slot Antenna ◽  
Antenna Gain ◽  
Analysis And Design ◽  
Microstrip Patch ◽  
Rectangular Form ◽  
Experimental Findings ◽  
5 Ghz

A new compact microstrip slot antenna with Y-shaped coupling aperture is proposed. This antenna is based on a rectangular form with a microstrip fed line for excitation, and consists of slots on the edge of the radiation patch to provide dual-band operation. The design and simulation of the antenna were performed using CST Microwave Studio simulator. A prototype of the proposed antenna has been constructed and tested. In order to validate the return loss of the prototype antenna, the experimental results are presented. The results show two available bands with –10 dB band S at 2.7 GHz and band C at 5 GHz. Also, good radiation performance and antenna gain over the two frequency ranges have been obtained. Computation results confirm the experimental findings. 

scholarly journals LAMİNASYON TEKNİĞİ İLE ÜRETİLEN FİLMLERE UYGULANAN TEKRARLI YIKAMALARIN, PARLAKLIK, LAMİNASYON KUVVETİ VE OPTİK DANSİTE ÖZELLİKLERİ AÇISINDAN ETKİLERİNİN İNCELENMESİ

2020 ◽  
Vol 15 (4) ◽  
pp. 174-185
Author(s):  
Elif Yılmaz ◽  
Sevda Altaş ◽  
Nildeniz Adman
Keyword(s):  
Mechanical Properties ◽  
Optical Density ◽  
Raw Materials ◽  
Raw Material ◽  
Sample Type ◽  
Surface Appearance ◽  
Rectangular Form ◽  
Different Temperatures ◽  
Over Time ◽  
Textile Products

Metalized yarns are produced by cutting the films in different thicknesses, metalized with aluminum on one or both sides, in a rectangular form in the desired dimensions and wrapping them on bobbins under a certain tension. Textile products made of these yarns are exposed to repetitive washings like most textile products; metal surfaces of metalized yarns are abraded over time, their bright appearance decreases or disappears. It is undesirable because it affects the lifetime of the final product. In the study, laminated films were produced by the lamination technique using different raw materials to produce metalized yarns with the improved fastness and mechanical properties. Laminated films were subjected to repetitive washings at different temperatures, and the effects of washings on the surface appearance of the films, lamination strength, and optical density properties were examined. As a result of the study, it was determined that repetitive washings reduce the lamination strength, the gloss property is affected by raw material type, the sample type, washing temperature, and the number of washing cycles affect the optical density.

scholarly journals Studying Settlement Gorodishche 1 in the Zonalnyi District

2020 ◽  
pp. 107-113
Author(s):  
A.A. Kazakov ◽  
O.M. Kazakova
Keyword(s):  
Open Hearth ◽  
Common Elements ◽  
Cultural Layer ◽  
Land Plot ◽  
Southern Shore ◽  
Rectangular Form ◽  
Economic Zone ◽  
A Site ◽  
First Time

The article is devoted to the publication of obtained materials from a site in the Itkul archaeological district that includes a settlement called Gorodishche 1. The site is located on the southern shore of Lake Bol'shoi Itkul, on the border of the Zonalnyi and Troitskii districts. The land plot of the settlement has a complex layout and is limited by a moat. At the site, an area of 64 square metres was excavated, as a result, a dwelling pit and a small part of the moat were investigated. The dwelling was a semi-hut of a semi-rectangular form with an open hearth. The area of the dwelling was about 28 square metres. The location of the materials in the dwelling pit shows the special features of the layout. The place of entrance was identified. The economic zone was distinguished by the location of the hearth and the accumulation of ceramics around it; it was located at the farthest wall from the entrance. There were not many finds in the cultural layer. The finds were represented by clusters of ceramics. The vessels were round-bottomed, of lowered proportions, decorated with ornament in the upper part. The most common elements of the ornament were pits. There was also a comb duck ornament. Just one element was used in the ornamental composition. The features of the ceramic complex allowed the authors to refer the studied site to the Fominskaya stage of the Kulaiskaya culture and date it within the 2nd-4th centuries. The material is published for the first time.

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