Results 41 to 50 of about 159,545 (358)
Letters in Mathematical Physics, 2004 We survey the many instances of derived bracket construction in differential geometry, Lie algebroid and Courant algebroid theories, and their properties. We recall and compare the constructions of Buttin and Vinogradov, and we prove that the Vinogradov bracket is the skew-symmetrization of a derived bracket.
openaire +2 more sources
Evaluatıon Of Frıctıon Between Varıous Brackets And Arch Wıre Materıals
Turkish Journal of Orthodontics, 1998 The aim of this study was to evaluate experimentally frictional forces produced between different brackets and arch wire materials. In the study, the frictional forces between four brackets (Stainless steel, porcelain, .polycarbonate and stainless steel ...
Yahya Tosun, Hanife Ünal
doaj +1 more source
BİR OTOMOBİL BRAKET TASARIMININ ANALİZİ ve DEĞERLENDİRMESİ
Uludağ University Journal of The Faculty of Engineering, 2023 Bu çalışma kapsamında otomobil ön tampon orta braketinin nümerik yöntemden yararlanılarak mekanik değerlendirmesi gerçekleştirilmiştir. Gerçekleştirilen nümerik analiz çalışmalarında sonlu elemanlar metodundan yararlanılmış olup bu metot için ANSYS ...
Lino Catenaro +3 more
doaj +1 more source
Angle Orthodontist, 2018 OBJECTIVES To compare the failure pattern of four different bracket types and to assess its effect on treatment duration. MATERIALS AND METHODS A total of 78 white patients (28 male, 50 female) with a mean age of 12.6 years were included in this ...
D. Stasinopoulos +5 more
semanticscholar +1 more source
Arithmetic of partitions and the $q$-bracket operator [PDF]
, 2016 We present a natural multiplicative theory of integer partitions (which are usually considered in terms of addition), and find many theorems of classical number theory arise as particular cases of extremely general combinatorial structure laws.
Robert Schneider
semanticscholar +1 more source
Extraction of Collagen and Preparation and Characterization of Nanofibers
Shipin gongye ke-ji, 2023 In order to improve the extraction rate and utilization rate of collagen in sheepskin, sheepskin collagen was extracted by acid enzyme compounding method, and collagen-based nanofibers were prepared by electrospinning technology.
Hongshuai HAN +4 more
doaj +1 more source
Applied Sciences, 2022 The aim of this in vitro study was to assess the effect of the type of orthodontic brackets and adhesive systems on enamel discoloration. The baseline color of the buccal surfaces of 50 extracted human premolars was recorded using a spectrophotometer ...
Ali Alqerban +6 more
doaj +1 more source
Modeling of Lightning Transients in Photovoltaic Bracket Systems
IEEE Access, 2019 The lightning transient calculation is carried out in this paper for photovoltaic (PV) bracket systems. The electrical parameters of the conducting branches and earthing electrodes are represented by resistances, capacitances, and inductances.
Yaowu Wang, Xiaoqing Zhang, Shiqi Tao
semanticscholar +1 more source
3D-Printed Satellite Brackets: Materials, Manufacturing and Applications
Crystals, 2022 Brackets are the load-bearing components in a satellite. The current age of satellites comprises specific brackets that set out as a link between the bodies of the satellite, reflector parts, and feeder facilities mounted at its upper end.
Saswat Kumar Samal +8 more
doaj +1 more source