Results 71 to 80 of about 58,230 (252)
Resolving the environmental factors that determine pond thermal refuge quality
Limnology and Oceanography Letters, EarlyView.Abstract Cold thermal refuges may mitigate detrimental effects of future climate warming; yet, pond ecosystems have been largely omitted from thermal refuge research despite being globally numerous and providing critical ecosystem services. We create a formal definition for pond thermal refuge quality, then operationalize this definition by measuring ...
Samuel B. Fey +7 more
wiley +1 more source
arXiv, 2015 The skewer of a pair of skew lines in space is their common perpendicular. To configuration theorems of plane projective geometry involving points and lines (such as Pappus or Desargues) there correspond configuration theorems in space: points and lines in the plane are replaced by lines is space, the incidence between a line and a point translates as ...
arxiv
, 2019 Safe navigation of Micro Aerial Vehicles (MAVs) requires not only obstacle-free flight paths according to a static environment map, but also the perception of and reaction to previously unknown and dynamic objects.
Behnke, Sven, Nieuwenhuisen, Matthias
core +1 more source
Taxonomic corrections and new records for vascular plants of Kyrgyzstan, 6
Nordic Journal of Botany, EarlyView.A series of notes on taxonomy, nomenclature, morphology and distributions of native species of vascular plants in Kyrgyzstan is presented. Anaphalis roseoalba is treated as a synonym of A. virgata; Hippolytia herderi and H. megacephala are new synonyms of H. senecionis; Hippolytia darvasica and H. schugnanica are new synonyms of H. tomentosa; Campanula
Alexander N. Sennikov +4 more
wiley +1 more source
On The Circular Altitude of Graphs [PDF]
arXiv, 2018 Peter Cameron introduced the concept of the circular altitude of graphs; a parameter which was shown by Bamberg et al. that provides a lower bound on the circular chromatic number. In this note, we investigate this parameter and show that the circular altitude of a graph is equal to the maximum of circular altitudes of its blocks.
arxiv
Altitude-dependent polarization in radio pulsars
, 2008 Because of the corotation, the polarization angle (PA) curve of a pulsar lags the intensity profile by 4r/Rlc rad in pulse phase. I present a simple and short derivation of this delay-radius relation to show that it is not caused by the aberration ...
Backer +42 more
core +2 more sources
New species and new records in Agarista (Ericaceae) from the Peruvian Andes
Nordic Journal of Botany, EarlyView.Agarista (Ericaceae) is currently represented in Peru by three species. Here, we update this number to five, adding new taxa based on the recognition of a taxonomic novelty and new records. The new species Agarista eugeniifolia differs from all congeneric species by an abaxially sulcate midvein.
Claudenice Hilda Dalastra +3 more
wiley +1 more source
Reciprocal Properties of Pythagorean triangles [PDF]
arXiv, 2011 Let (a,b,c)be a Pythagorean triple with c being the hypotenuse length, and h being the altitude to the hypotenuse. Also, let v,k,l be positive integers with k and l being relatively prime.We say(Definition1 in this work)that the Pythagorean triple (a,b,c) has the reciprocal property R(v,k,l)if the positive integers a,b,c,v,k,and l satisfy the condition
arxiv
Characterizations of the Borel triangle and Borel polynomials [PDF]
arXiv, 2020 We use Riordan array theory to give characterizations of the Borel triangle and its associated polynomial sequence. We show that the Borel polynomials are the moment sequence for a family of orthogonal polynomials whose coefficient array is a Riordan array. The role of the Catalan matrix in defining the Borel triangle is examined.
arxiv
People and Nature, EarlyView.Abstract Human‐wildlife conflicts (HWCs) are one of the most critical conservation challenges worldwide. Large carnivores are frequently at the centre of these conflicts because of the perceived and real threats they pose to livestock and human safety.
Esperanza C. Iranzo +10 more
wiley +1 more source