Ultraviolet Bird Photography - Images
Birds can see ultraviolet light, in addition to the colors that the human eye can see. These groundbreaking photos by Nathan Chronister give us a first glimpse of what birds might look like to other birds.
Show HN: tetradoom - from dos to desktop using only host system libraries
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tetra-framework/tetra
Tetra - A full stack component framework for Django using Alpine.js (⭐ 612)
osmocom/osmo-tetra
Osmocom TETRA MAC/PHY experimentation code; Mirrored from https://gitea.osmocom.org/tetra/osmo-tetra (⭐ 75)
cropinghigh/sdrpp-tetra-demodulator
Tetra demodulator plugin for SDR++ (output can be fed to tetra-rx from osmo-tetra) (⭐ 147)
Tetra-amelia syndrome - Wikipedia
Tetra-amelia syndrome (tetra- + amelia), also called autosomal recessive tetraamelia, is an extremely rare autosomal recessive congenital disorder characterized
cmu-phil/tetrad
Repository for the Tetrad Project, www.phil.cmu.edu/tetrad. (⭐ 438)
Glass tetra - Wikipedia
Glass tetra is Bario oligolepis It may also refer to: Glass bloodfin tetra (Prionobrama filigera) Heterocharax virgulatus (Blue flash glass tetra) Xenagoniates
Tetra and Didi, the cosmic spectral twins
We introduce a pair of isospectral but non-isometric compact flat 3-manifolds called Tetra (a tetracosm) and Didi (a didicosm). The closed geodesics of Tetra and Didi are very different. Where Tetra has two quarter-twisting geodesics of the shortes...
Tetra - Wikipedia
Look up tetra in Wiktionary, the free dictionary. Tetra is the common name of many small freshwater characiform fishes. Tetras come from Africa, Central
Nonlinear Schrödinger type tetrahedron maps
This paper is concerned with the construction of new solutions in terms of birational maps to the functional tetrahedron equation and parametric tetrahedron equation. We present a method for constructing solutions to the parametric tetrahedron equati...
Tetrabiblos - Wikipedia
of a codex rather than a roll. Since the Paraphrase edition of the Tetrabiblos aimed to present the work's meaning without Ptolemy's own complicated style
Tetra Fish Care Sheet - PetMD
Feb 26, 2024 · Learn everything about tetra fish care, including tank size requirements and what to feed a tetra fish.
25 Popular Types of Tetras in 2026 (With Info & Pictures)
Jan 5, 2026 · Tetras come in dozens of varieties, each with their own individual touches. Tetras are schooling fish and a group of them brings a lot of life and fun to a tank. They come in a variety of …
Tetra Fish Care Sheet - PetMD
Feb 26, 2024 · Learn everything about tetra fish care, including tank size requirements and what to feed a tetra fish.
25 Popular Types of Tetras in 2026 (With Info & Pictures)
Jan 5, 2026 · Tetras come in dozens of varieties, each with their own individual touches. Tetras are schooling fish and a group of them brings a lot of life and fun to a tank. They come in a variety of …
Mass Spectra of $qq\bar{q}\bar{q}$, $ss\bar{s}\bar{s}$ and $qq\bar{s}\bar{s}$ Te…
In this paper, we explore the mass spectra of $qq\bar{q}\bar{q}$, $ss\bar{s}\bar{s}$ and $qq\bar{s}\bar{s}$ tetraquarks by employing Regge phenomenology. We calculate the range for ground state masses of $qq\bar{s}\bar{s}$ tetraquarks, and estimate t...
Intersection Searching amid Tetrahedra in Four Dimensions
We develop data structures for intersection queries in four dimensions that involve segments, triangles and tetrahedra. Specifically, we study three main problems: (i) Preprocess a set of $n$ tetrahedra in $\reals^4$ into a data structure for answeri...
The heavy tetra-quark states after the discovery of tetra-charm states
This paper is devoted to the study of exclusive charm and bottom aggregates which are suitable, at least partially, for a non-relativistic description. Starting from a simple choice of quarkonia and tetra-quark wave functions we study their productio...
Tetra Laval - Wikipedia
Tetra Laval is a Swiss-domiciled multinational corporation of Swedish origin, with headquarters in Pully (Vaud), Switzerland. The Tetra Laval Group provides