Determination of optimum tilt angle and accurate insolation of BIPV panel influenced by adverse effect of shadow

Abstract Today’s industry aims at such situation, where number of defective products, so called defects shall approach to zero. Therefore, one introduces a various changes in technology of production, introduces improvements which would help in accomplishment of this objective. Another important factor is introduction of different type of testing, which shall help in assessment which factor has significant effect on quantity of rejects, and which one could be neglected. Existence of casting rejects is unavoidable; therefore a new ideas, technologies and innovations are necessary in the entire widely understood foundry branch, in order to minimize such adverse effect. Performance of tests aimed at unequivocal determination of an effect of vibrations during crystallization on mechanical properties and porosity of the EN ACAlSi17 alloy was the objective of the present work. To do this, there were produced 36 castings from EN AC-AlSi17 alloy. All the castings underwent machining operations. Half of the casting was destined to strength tests, the other half served to determination of an effect of vibrations on porosity of the alloy. The specimens were divided into 12 groups, depending on amplitude of vibrations and tilt angle of metal mould during pouring operation.

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Statistical issues on the determination of the no-observed-adverse-effect levels in toxicology

Environmetrics ◽

10.1002/env.467 ◽

2001 ◽

Vol 12 (4) ◽

pp. 319-325 ◽

Cited By ~ 5

Author(s):

Takashi Yanagawa ◽

Yasuki Kikuchi

Keyword(s):

Adverse Effect ◽

Statistical Issues

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Investigation of Adverse Effect of Coexisting EDTA during Chelating-resin Solid Phase Extraction on the Determination of Trace Elements in Environmental Water Samples by ICP-MS

BUNSEKI KAGAKU ◽

10.2116/bunsekikagaku.70.31 ◽

2021 ◽

Vol 70 (1.2) ◽

pp. 31-37

Author(s):

Eiji FUJIMORI ◽

Hidetoshi KUMATA ◽

Tomonari UMEMURA

Keyword(s):

Adverse Effect ◽

Trace Elements ◽

Solid Phase Extraction ◽

Solid Phase ◽

Environmental Water ◽

Chelating Resin ◽

Phase Extraction ◽

Resin Solid ◽

Icp Ms

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Automatic validation of the gantry tilt in a computed tomography scanner using a head polymethyl methacrylate phantom

Polish Journal of Medical Physics and Engineering ◽

10.2478/pjmpe-2021-0008 ◽

2021 ◽

Vol 27 (1) ◽

pp. 57-62

Author(s):

Rakhma Noviliawati ◽

Choirul Anam ◽

Heri Sutanto ◽

Geoff Dougherty ◽

Muhammad Ridha Mak’ruf

Keyword(s):

Computed Tomography ◽

Polymethyl Methacrylate ◽

Tilt Angle ◽

Automatic Method ◽

Phantom Measurement ◽

Manual Method ◽

Method R ◽

Computed Tomography Scanner ◽

Automatic Validation

Abstract The purpose of this study was to develop an automatic method for validating the computed tomography gantry tilt. A head polymethyl methacrylate phantom with a diameter of 16 cm was used. Gantry tilt angles were measured both manually and automatically. Manual measurements were performed by measuring the length of the anteroposterior and lateral diameters from acquired images using electronic calipers. Automatic measurements consisted of a number of steps: phantom segmentation, determination of the center of the phantom, measurement of the anteroposterior and lateral diameters, and computation of the gantry tilt angle. The method was implemented on the gantry angles from 0° to 15°. The proposed method of measuring gantry angles produced accurate gantry tilt angles. The differences with the angles displayed on the gantry were less than 1°. The results of the automatic method were the same as those of the manual method (R2 > 0.98).

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On the Measurement of Atmospheric Extinction by Rufener’s Method

Publications of the Astronomical Society of Australia ◽

10.1017/s132335800002645x ◽

1979 ◽

Vol 3 (5) ◽

pp. 326-327

Author(s):

Z. KviZ

Keyword(s):

Adverse Effect ◽

Photometric System ◽

Photoelectric Photometry ◽

Atmospheric Extinction ◽

Air Mass

The coefficient of atmospheric extinction may change during the night and in fact it often does. This has an adverse effect on the determination of atmospheric extinction by simple Bouguer plot of magnitude against air mass. This effect was studied by Rufener (1964), who introduced for the purpose of accurate photoelectric photometry in the Geneva photometric system the method of two ‘extinction stars’. His method consists of the measurement of two stars of the same colour — one starting at high air mass 2 - 3, the M-star (for French montante = rising) and the second starting simultaneously in the meridian at low air mass, the D—star (for descending).

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Determination of Attack Angle and Tilt Angle of a Cutting Pick

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.705.415 ◽

2013 ◽

Vol 705 ◽

pp. 415-418 ◽

Cited By ~ 1

Author(s):

Yong Sun ◽

Xing Sheng Li

Keyword(s):

Tilt Angle ◽

Attack Angle ◽

Optimal Values ◽

Skew Angles ◽

The Relationship

Mechanical excavators play an important role in mining and construction. An excavation machine cuts rocks using its cutterhead which is normally composed of a large number of cutting picks. These picks are installed on a drum with certain attack angles, tilt angles and skew angles. These angles, especially attack and tilt angles, will affect the forces acting on individual picks and the cutterhead. To ensure the reliability and productivity of the excavation machine, these angles have to be kept in their optimal values. However, in manufacturing, these three types of angles cannot be set simultaneously. They have to be respectively set one after another. As a result, the angle which is set previously will be changed by the angles which are determined after it. Understanding the relationship between the values of the final angle and the designed angle is important for optimizing drum and pick design. This paper develops a formula for quantitatively analyzing this relationship, with the research scope limited to attack angle and tilt angle only as the first stage of the study.

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