Results 251 to 260 of about 884,628 (273)
Some of the next articles are maybe not open access.
The Perimeter and Area of Reduced Spherical Polygons of Thickness $$\pi /2$$
Results in Mathematics, 2020The authors focus on the following conjectures on perimeter and area of reduced spherical polygons, formulated by \textit{M. Lassak} [Colloq. Math. 138, No. 2, 205--216 (2015; Zbl 1316.52017)]: \begin{itemize} \item[``(1)] The perimeter of every reduced spherical polygon is less than or equal to that of the regular spherical triangle of the same ...
Yanxun Chang, Cen Liu, Zhanjun Su
openaire +1 more source
Vier Mal $$ \frac{{\pi^{2} }}{6} $$
2018Die Summe der Reziproken der Quadratzahlen konvergiert, wenn auch nur sehr langsam, wie wir sehen werden, und sie ergibt einen interessanten Wert.
Martin Aigner, Günter M. Ziegler
openaire +1 more source
A transient response model of Pi 2 pulsations
Journal of Geophysical Research: Space Physics, 1982A transient response model of Pi 2 pulsations due to an enhanced convection in the plasma sheet is presented. A nonlinear Alfvén wave is launched by the enhanced convection electric field. The reflection coefficient at the ionosphere is derived by matching the field‐aligned current of the Alfvén wave to the field‐aligned current from the divergence of ...
Joseph R. Kan +2 more
openaire +1 more source
A Raspberry Pi 2-based stereo camera depth meter
2017 Fifteenth IAPR International Conference on Machine Vision Applications (MVA), 2017The Raspberry Pi single-board computer is a low cost, light weight system with small power requirements. It is an attractive embedded computer vision solution for many applications, including that of UAVs. Here, we focus on the Raspberry Pi 2 and demonstrate that, with the addition of a multiplexer and two camera modules, it is able to execute a full ...
James Cooper +5 more
openaire +1 more source
Implementation of multimodal neonatal identification using Raspberry Pi 2
Proceedings of the 2nd International Conference on Communication and Information Processing, 2016Abduction, swapping and mix-ups are the unfortunate events that could happen to newborn while in hospital premises and medical personnel are finding it difficult to curb this unfortunate incident. Traditional methods like birth ID bracelets and offline footprint recognition systems have their own drawbacks.
S. Sumathi, R. Poornima, T. Haripriya
openaire +2 more sources
Related investigations of pi 2 micropulsations
2011Related investigations of irregular, nighttime, type Pi 2 micropulsations were undertaken with regards to the source and occurrence of these geomagnetic fluctuations. In particular, the local times of Pi 2's recorded by a global network of stations, during 1964, were determined.
openaire +1 more source
The Variation of Pi 2 Micropulsation Waveform with Time
Radio Science, 1969Pi 2 micropulsations observed ‘simultaneously’ at two widely separated low‐latitude stations: M'Bour, Senegal, in West Africa, and Makerere, Uganda, in East Africa have been compared. The variation in the waveforms has been measured in terms of an average damping coefficient and the number of excursions taken for events to reach their peak amplitude ...
openaire +1 more source
Electromagnetic Data from a Raspberry Pi 2
2017EM data from a Raspberry Pi 2 as the AES-128 cryptographic algorithm was ...
openaire +1 more source
Latitude effects on the amplitude of Pi 2 micropulsations
Journal of Atmospheric and Terrestrial Physics, 1972The effect of latitude on the amplitude of Pi 2 micropulsations has been studied using data from Hobart, Brisbane and Lae. Theories of the source mechanism of this class of pulsation are considered and it is shown that the present results favour cavity excitation as the mode of generation.
openaire +3 more sources
Mechanism of certain intramolecular [.pi.2 + .pi.2] cycloadditions
Journal of the American Chemical Society, 1974Harold Hart, Masayuki Kuzuya
openaire +1 more source