Results 21 to 30 of about 619,697 (330)
p-Mechanics and Field Theory [PDF]
, 2004 The orbit method of Kirillov is used to derive the p-mechanical brackets [math-ph/0007030, quant-ph/0212101]. They generate the quantum (Moyal) and classic (Poisson) brackets on respective orbits corresponding to representations of the Heisenberg group ...
Kisil, Vladimir V.
core +3 more sources
Lifting of the Vlasov–Maxwell bracket by Lie-transform method [PDF]
Journal of Plasma Physics, 2016 The Vlasov–Maxwell equations possess a Hamiltonian structure expressed in terms of a Hamiltonian functional and a functional bracket. In the present paper, the transformation (‘lift’) of the Vlasov–Maxwell bracket induced by the dynamical reduction of single-particle dynamics is investigated when the reduction is carried out by Lie-transform ...
Brizard, A. J. +4 more
openaire +2 more sources
Comparison of Enamel Demineralisation Scores between Passive Self-Ligation Brackets and Conventional Ligation Brackets in Patients Undergoing Orthodontic TreatmentA Laser Fluorescence Study [PDF]
Journal of Clinical and Diagnostic Research, 2020 Introduction: Enamel demineralisation is often seen in patients undergoing fixed orthodontic treatment because appliances create retentive areas around the brackets leading to food debris accumulation.
Akriti Tiwari, Ravindra Kumar Jain
doaj +1 more source
Branes, Quantum Nambu Brackets, and the Hydrogen Atom [PDF]
, 2004 The Nambu Bracket quantization of the Hydrogen atom is worked out as an illustration of the general method. The dynamics of topological open branes is controlled classically by Nambu Brackets.
Curtright, Thomas, Zachos, Cosmas
core +2 more sources
The Effect of Different Bracket Base Cleaning Method on Shear Bond Strength of Rebonded Brackets
The Journal of Contemporary Dental Practice, 2013 ABSTRACT Aim To assess the effect of different bracket base conditioning method on shear bond strength (SBS) of rebonded brackets. Materials and methods Eighty brackets were bonded to freshly extracted premolar teeth using light cured composite adhesive. SBS was measured for 20 random samples as control group (G1).
Emad F, Al Maaitah +3 more
openaire +2 more sources
Comparison of the Debonding Characteristics of Conventional and New Debonding Instrument used for Ceramic, Composite and Metallic Brackets – An Invitro Study [PDF]
Journal of Clinical and Diagnostic Research, 2014 Background: Debonding procedure is time consuming and damaging to the enamel if performed with improper technique. Various debonding methods include: the conventional methods that use pliers or wrenches, an ultrasonic method, electrothermal devices ...
Garima Choudhary +5 more
doaj +1 more source
The Moments of the Hydrogen Atom by the Method of Brackets [PDF]
Symmetry, Integrability and Geometry: Methods and Applications, 2017 Expectation values of powers of the radial coordinate in arbitrary hydrogen states are given, in the quantum case, by an integral involving the associated Laguerre function. The method of brackets is used to evaluate the integral in closed-form and to produce an expression for this average value as a finite sum.
Gonzalez, Ivan +4 more
openaire +3 more sources
Journal of Orthodontic Science, 2020 OBJECTIVE: To compare demineralization around orthodontic brackets cured by conventional method and transillumination method. MATERIALS AND METHOD: Sixty freshly extracted human premolar teeth were divided into four groups. Group 1: Brackets bonded with
Monis Raza +5 more
doaj +1 more source
Deformation Quantization of Nambu Mechanics [PDF]
, 2003 Phase Space is the framework best suited for quantizing superintegrable systems--systems with more conserved quantities than degrees of freedom. In this quantization method, the symmetry algebras of the hamiltonian invariants are preserved most naturally,
Curtright, Thomas L, Zachos, Cosmas K
core +4 more sources
Comparison of the shear Bond strength between new and recycled brackets: An in vitro study [PDF]
Iranian Journal of Orthodontics, 2009 Aim: There are currently many patients who need orthodontic treatment. Given the high expense of orthodontic therapy and the fact that orthodontic brackets are recyclable elements, this study was carried out to compare the shear Bond strength of new and ...
Valiollah Arash, Abdolmajid Alizadeh
doaj +1 more source