The Proof of 15 Projective Spheres between Orthogonal Four Spheres and Algorithm of Distance Formula—Application of Pythagorean Theorem of Four Dimensional Volume (Formula (3))

2019 ◽  
Vol 09 (08) ◽  
pp. 928-948 ◽  
Author(s):  
国伟 蔡
Keyword(s):  
Pythagorean Theorem ◽  
Volume Formula ◽  
Distance Formula

Simple Constructions for the Regular Pentagon and Heptadecagon

1989 ◽  
Vol 82 (5) ◽  
pp. 361-365
Author(s):  
Duane W. Detemple
Keyword(s):  
Pythagorean Theorem ◽  
Regular Polygons ◽  
Common Elements ◽  
Regular Pentagon ◽  
Interesting Variation ◽  
Construction Works ◽  
Distance Formula

This article discusses two new Euclidean constructions to inscribe regular polygons of five and seventeen sides in a circle. The pentagon's construction shares many common elements with the familiar Ptolemaic method (see, e.g., Jacobs [1982, 254 55]), but an interesting variation occurs in the final steps. The explanation given for why the construction works is unusual in that it does not make use of the distance formula of the Pythagorean theorem.

Rancang Bangun Sistem Monitoring Pengukuran Volume Air Berbasis IoT Menggunakan Arduino Wemos

2020 ◽  
Vol 6 (2) ◽  
pp. 147-153
Author(s):  
Muhamad Yusup ◽  
Po. Abas Sunarya ◽  
Krisandi Aprilyanto
Keyword(s):  
Waste Water ◽  
Waste Water Treatment ◽  
Water Reservoir ◽  
Ultrasonic Sensor ◽  
Automated System ◽  
Volume Formula ◽  
Air Volume ◽  
Database Server ◽  
A Company ◽  
Height Data

System The process of counting and storing in a manual water reservoir analysis has a high percentage of error rate compared to an automated system. In a company industry, especially in the WWT (Waste Water Treatment) section, it has several reservoir tanks as stock which are still counted manually. The ultrasonic sensor is placed at the top of the WWT tank in a hanging position. Basically, to measure the volume in a tank only variable height is always changing. So by utilizing the function of the ultrasonic sensor and also the tube volume formula, the stored AIR volume can be monitored in real time based on IoT using the Blynk application. From the sensor, height data is obtained which then the formula is processed by Arduino Wemos and then information is sent to the MySQL database server via the WIFI network.

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