Results 1 to 10 of about 1,755,131 (136)
A revised terminology for the pharyngeal arches and the arch arteries
Journal of Anatomy, 2023 AbstractThe pharyngeal arches are a series of bulges found on the lateral surface of the head of vertebrate embryos. In humans, and other amniotes, there are five pharyngeal arches and traditionally these have been labelled from cranial to caudal—1, 2, 3, 4 and 6. This numbering is odd—there is no ‘5’. Two reasons have been given for this.
Anthony Graham +4 more
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Landscape Arch, Delicate Arch, and Double Arch in Arches National Park, Southeastern Utah
Geosites, 2020 Arches National Park in southeastern Utah has the greatest concentration of natural rock arches in the world. The park is located in a geologic region called the Paradox fold and fault belt in the northern Paradox Basin and showcases spectacular and classic Colorado Plateau geology with its colorful sedimentary rocks, ancient sand dunes, cliffs, domes,
Jr. Chidsey Thomas, Grant C. Willis
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Statistical inference for time-varying ARCH processes [PDF]
, 2006 In this paper the class of ARCH$(\infty)$ models is generalized to the nonstationary class of ARCH$(\infty)$ models with time-varying coefficients. For fixed time points, a stationary approximation is given leading to the notation ``locally stationary ...
Dahlhaus, Rainer, Rao, Suhasini Subba
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Structural behaviour of masonry arch with no-horizontal springing settlement [PDF]
, 2017 This paper presents a calculation procedure for assessing the structural integrity of a masonry arch with non-horizontal springing settlement. By applying the Principle of Virtual Work (PVW) to the deformed arch system, the procedure proposed herein ...
Pellegrino, Carlo +2 more
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Rampant Arch and Its Optimum Geometrical Generation [PDF]
, 2019 Gothic art was developed in western Europe from the second half of the 12th century to the end of the 15th century. The most characteristic Gothic building is the cathedral.
Alcayde García, Alfredo +5 more
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Expansion with transpalatal arch or continuous arch mechanics
American Journal of Orthodontics and Dentofacial Orthopedics, 2020 This study aimed to compare the 3-dimensional force system produced by transpalatal arch (TPA) mechanics with that produced by a continuous arch (CA) on the expansion of maxillary first molars.A patient's model with 2 molars in 4-mm crossbite had orthodontic appliances bonded to all teeth.
Ledra, Ingrid Muller +2 more
openaire +4 more sources
Breaking arches with vibrations: the role of defects [PDF]
, 2012 We present experimental results about the stability of arches against external vibrations. Two dimensional strings of mutually stabilizing grains are geometrically analyzed and subsequently submitted to a periodic forcing at fixed frequency and ...
Angel Garcimartín +6 more
core +1 more source
Segmented arch or continuous arch technique? A rational approach [PDF]
Dental Press Journal of Orthodontics, 2014 This study aims at revising the biomechanical principles of the segmented archwire technique as well as describing the clinical conditions in which the rational use of scientific biomechanics is essential to optimize orthodontic treatment and reduce the side effects produced by the straight wire technique.
Caldas, Sergei Godeiro Fernandes Rabelo +3 more
openaire +7 more sources
Basket-Handle Arch and Its Optimum Symmetry Generation as a Structural Element and Keeping the Aesthetic Point of View [PDF]
, 2019 The arches were a great advance in construction with respect to the rigid Greek linteled architecture. Its development came from the hand of the great Roman constructions, especially with the semicircular arch. In successive historical periods, different
Alcayde García, Alfredo +5 more
core +4 more sources
Wnt/Lef1 signaling acts via Pitx2 to regulate somite myogenesis [PDF]
, 2010 Wnt signaling has been implicated in somite, limb, and branchial arch myogenesis but the mechanisms and roles are not clear. We now show that Wnt signaling via Lef1 acts to regulate the number of premyogenic cells in somites but does not regulate ...
Ai +54 more
core +1 more source