Results 101 to 110 of about 512,547 (364)

Evaluation of the Influence of Vestibular Surface Morphology Variability of Maxillary Incisors on Torque: Examination Using 3D Intraoral Scans

Applied Sciences
Proper torque is an important element of orthodontic treatment. There are many factors affecting effective torque expression, e.g., the interplay between an archwire and a bracket, the precision during bracket positioning, and the morphology of the crown
Michał Wajda, Joanna Lis, Liwia Minch, Beata Kawala   +3 more
doaj   +1 more source

Investigation of Joining Methods of Honeycomb Composite Panels Used in Structural Elements of Aircraft Cabin Units

Havacılık ve Uzay Teknolojileri Dergisi, 2021
The design, material selection, manufacture and assembly of aircraft structural elements are critical issues in the aviation industry. This study aims to optimize the selection of joining methods of aircraft honeycomb panels by considering strength ...
Sena Kabave Kılınçarslan, Aslan Kahraman Erhal, Şeyma Korkmaz, M. Hüseyin Çetin   +3 more
doaj  

The Poisson bracket on free null initial data for gravity

, 2009
Free initial data for general relativity on a pair of intersecting null hypersurfaces are well known, but the lack of a Poisson bracket and concerns about caustics have stymied the development of a constraint free canonical theory. Here it is pointed out
Michael P. Reisenberger, R. M. Wald
core   +1 more source

Integrability of Poisson Brackets

Journal of Differential Geometry, 2004
43 pages, 1 ...
Marius Crainic, Marius Crainic, Rui Loja Fernandes, Rui Loja Fernandes   +3 more
openaire   +5 more sources

Impact of Various Rotary Friction Welding Process Parameters on the Mechanical Properties of a Steel–Aluminum Joint

Advanced Engineering Materials, EarlyView.
Rotary friction welding of steel E355 and the aluminum alloy EN AW‐6082 can lead to the formation of brittle intermetallic phases. The primary process parameters are varied in order to determine their influence on this intermetallic phase formation and the resulting mechanical properties.
Laura Huber, Phillipp Schultheiß, Michael Thiele, Christoph Rößler, Heinz Werner Höppel   +4 more
wiley   +1 more source

Functionals and the Quantum Master Equation

, 2005
The quantum master equation is usually formulated in terms of functionals of the components of mappings from a space-time manifold M into a finite-dimensional vector space. The master equation is the sum of two terms one of which is the anti-bracket (odd
A. S. Schwarz, G. Barnich, G. Barnich, G. Giachetta, M. Henneaux, O. M. Khudaverdian, O. M. Khudaverdian, Ronald O. Fulp, S. Al-Ashhab   +8 more
core   +2 more sources

Making Photoresponsive Metal–Organic Frameworks an Effective Class of Heterogeneous Photocatalyst

Advanced Functional Materials, EarlyView.
This review summarizes photoresponsive MOFs for photocatalytic applications, focusing on their capacity to enhance light harvesting, charge transfer, and surface reactions. While existing studies provide foundational insights, emerging characterization techniques enable a deeper understanding of photoresponsive MOFs.
Rui Liu, Hao Wu, Hoi Ying Chung, Yun Hau Ng   +3 more
wiley   +1 more source

Effect of Mechanical Surface Treatment on Shear Bond Strength of Orthodontic Brackets to 3D Printed and Milled CAD/CAM Provisional Materials: An In Vitro Study

Journal of Functional Biomaterials
The aim of the study is to assess the impact of mechanical surface treatments on the shear bond strength (SBS) of orthodontic brackets bonded to three-dimensional (3D) printed and milled CAD/CAM provisional materials.
Abdulaziz A. Alzaid, Khalid K. Alanazi, Lulu A. Alyahya, Maha N. Alharbi, Hatem Alqarni, Mohammed Alsaloum, Hayam A. Alfallaj, Ghada S. Alotaibi   +7 more
doaj   +1 more source

Galvanic Corrosion among Different Combination of Orthodontic Archwires and Stainless Steel Brackets [PDF]

Journal of Dental Materials and Techniques, 2014
Introduction: The aim of this study was to assess the galvanic behavior of different bracket and archwire combinations that are commonly used in orthodontic treatments. Methods: Three types of orthodontic archwires with a diameter of 0.016×0.022 inch and
Farzin Heravi, Nima Mokhber, Elnaz Shayan   +2 more
doaj  

Realizations of observables in Hamiltonian systems with first class constraints

, 2004
In a Hamiltonian system with first class constraints observables can be defined as elements of a quotient Poisson bracket algebra. In the gauge fixing method observables form a quotient Dirac bracket algebra.
A. V. BRATCHIKOV, Dirac P. A. M., Sniatycki I. J.   +2 more
core   +1 more source