𝑴𝒂𝒙 𝑷𝒍𝒂𝒏𝒄𝒌 𝒏𝒆𝒘𝒔𝒑𝒂𝒑𝒆𝒓

2021-09-19 19:24:06 باز کردن / نظر دهید

2021-09-19 11:31:15 Бчран Сциенце pinned a photo باز کردن / نظر دهید

2021-09-19 11:30:40 Physics and Vodka!

On 24 November 1959, the Proton Synchrotron (PS) accelerated particles to 24 GeV. John Adams, leader of the construction team, announced the achievement in the Main Auditorium. In his hand can be seen an empty vodka bottle, which he had received from Nikitin with the message that it was to be drunk when CERN passed Dubna's world record energy of 10 GeV. The empty bottle that John Adams is holding contained a polaroid photograph of the 24 GeV pulse that was later sent to the Soviet Union.

Image: CERN باز کردن / نظر دهید

2021-09-19 11:26:34 منظف ​​روبوت صغير ، مصنوع من مواد الخردة باز کردن / نظر دهید

2021-09-19 11:26:17 On this day in 1826 the great mathematician Bernhard Riemann was born. His novel approach to geometry laid the foundation for Einstein’s theory of General Relativity. Also made important contributions to the theory of functions, complex analysis, and number theory. باز کردن / نظر دهید

2021-09-18 22:40:25 ‏وفي نهاية الحل إذا كانت الوحدة خطأ :
#Mohanned_Qasim باز کردن / نظر دهید

2021-09-18 11:18:42 ‏الحمام الكهربائي 1910م !
أحدى محاولة الطب لعلاج الروماتيزم في ذلك الوقت ..... باز کردن / نظر دهید

2021-09-17 17:29:03 Золотой рутил

Несмотря на красивое название, к золоту данный образец не имеет никакого отношения.
Рутил (TiO2) который вырос первым, охватили кристаллы кварца (SiO2), которые выросли поверх его.
Вот и получается такая красота.
Из-за особенностей кристаллографии и условий роста: у рутила игольчатые кристаллы باز کردن / نظر دهید

2021-09-17 15:47:28 UMBILIC TORUS
A single-ended 3-dimensional shape

Face and edge property
The long edge goes three times around the ring The shape has only one external face.

Cross section property
A cross section of the surface forms a deltoid.
Deltoid
The roulette created by a point on the circumference of a circle as it rolls without slipping along the inside of a circle with three or one-and-a-half times its radius.

Parametric form
x = sin u(7 + cos(⅓u - 2v) + 2cos(⅓u + v))
y = cos u(7 + cos(⅓u - 2v) + 2cos(⅓u + v))
z = sin(⅓u - 2v) + 2sin(⅓u + v)
-π ≤ u ≤ π, -π ≤ v ≤ π

Singularity theory
The umbilic torus occurs in the classification of umbilical points (points on a surface that are locally spherical.) which are determined by real cubic forms
ax³ + 3bx²y + 3cxy² + dy³
The equivalence classes of such cubics form a three-dimensional real projective space and the subset of parabolic forms define a surface — the umbilic torus.

Sculpture
In 2012, celebrated sculptor and mathematician Dr. Helaman Ferguson joined President Samuel L. Stanley Jr., MD, and Jim and Marilyn Simons for the dedication of his piece, Umbilic Torus, at Stony Brook University, New York. باز کردن / نظر دهید

2021-09-17 15:47:16 باز کردن / نظر دهید