Japan sets third launch attempt of next-gen rocket for February
Japan's space agency announced Thursday it will launch its next-generation H3 rocket in February after two failed attempts early this year.
Japan's space agency announced Thursday it will launch its next-generation H3 rocket in February after two failed attempts early this year.
Space Exploration
Dec 28, 2023
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Every motor we use needs a magnet. University of Manitoba researcher Rachel Nickel is studying how rust could make those magnets cheaper and easier to produce.
Nanophysics
Oct 5, 2023
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A Japanese rocket engine exploded during a test on Friday, an official said, in the latest blow to the country's space agency.
Space Exploration
Jul 14, 2023
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A research team led by Dr. Youn-kyoung Baek and Dr. Jung-goo Lee succeeded in developing the world's first technology to consecutively manufacture epsilon iron oxide that can absorb millimeter wave with a high coercive force ...
Analytical Chemistry
Dec 7, 2022
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Astronomers searching for Earth-like planets in other solar systems have made a breakthrough by taking a closer look at the surface of stars.
Astronomy
Oct 26, 2021
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271
Although out of sight to the majority of end users, data centers work behind the scenes to run the internet, businesses, research institutions and more. These data centers depend on high-capacity digital storage, the demand ...
Materials Science
Oct 8, 2020
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183
Antennas catch radio waves, a form of electromagnetic radiation, from the air and convert the energy into electrical signals that feed modern telecommunications. They can also convert electrical signals into radio waves. ...
Optics & Photonics
Mar 13, 2019
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World energy consumption projections predict that coal will remain one of the world's main energy sources in coming decades, and a growing share of it will be used in CTL, the conversion of coal to liquid fuels. Researchers ...
Materials Science
Oct 12, 2018
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As with most other telescopes, astronomers apply for observing time on SOFIA by submitting proposals that are being evaluated by peers for their scientific promise and intellectual merits. SOFIA, however, is special in that ...
Space Exploration
May 3, 2017
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11
Imagine living on a world where, every 69 years, the sun disappears in a near-total eclipse that lasts for three and a half years.
Astronomy
Feb 18, 2016
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Epsilon (uppercase Ε, lowercase ε or lunate ϵ; Greek: Έψιλον) is the fifth letter of the Greek alphabet, corresponding phonetically to a close-mid front unrounded vowel /e/. In the system of Greek numerals it has a value of 5. It was derived from the Phoenician letter He . Letters that arose from Epsilon include the Roman E and Cyrillic Ye.
The name "epsilon" (ἒ ψιλόν, "simple e") was coined in the Middle Ages to distinguish the letter from the digraph αι, a former diphthong that had come to be pronounced the same as epsilon.
The uppercase form of epsilon looks essentially identical to Latin E. The lowercase version has two typographical variants, both inherited from medieval Greek handwriting. One, the most common in modern typography and inherited from medieval minuscule, looks like an inverted "3". The other, also known as lunate or uncial epsilon and inherited from earlier uncial writing, looks like a semicircle crossed by a horizontal bar. While in normal typography these are just alternate font variants, they may have different meanings as mathematical symbols. Computer systems therefore offer distinct encodings for them. In Unicode, the character U+03F5 "Greek lunate epsilon symbol" (ϵ) is provided specifically for the lunate form. In TeX, \epsilon () denotes the lunate form, while \varepsilon () denotes the inverted-3 form.
There is also a Latin epsilon or "open e", which looks similar to the Greek lowercase epsilon. It is encoded in Unicode as U+025B ("Latin small letter open e", ɛ) and U+0190 ("Latin capital letter open e", Ɛ) and is used as an IPA phonetic symbol. The lunate or uncial epsilon has also provided inspiration for the euro sign (€).
The lunate epsilon (ϵ) is not to be confused with the set membership symbol (∈), nor should the Latin uppercase epsilon (Ɛ) be confused with the Greek uppercase sigma (Σ).
This text uses material from Wikipedia, licensed under CC BY-SA