Results 21 to 30 of about 138,876 (301)

Influence of elongation factor on distributions of effective strain and flow stress for pushing through a conical die process of round bars made from S355 steel

MATEC Web of Conferences, 2019
The paper presents computer modelling results of researches on pushing through a conical die process of round bars. Calculations were carried out using the commercial code QFORM-2D, based on the Finite Element Method (FEM).
Miłek Tomasz
doaj   +1 more source

Groupoids and an index theorem for conical pseudo-manifolds [PDF]

, 2006
We define an analytical index map and a topological index map for conical pseudomanifolds. These constructions generalize the analogous constructions used by Atiyah and Singer in the proof of their topological index theorem for a smooth, compact manifold
Baaj Saad, Cheeger J., Claire Debord, da Silva A. Cannas, Debord C., Fedosov B., Freed D., Gorokhovsky A., Hilsum M., Jean-Marie Lescure, Kasparov G. G., Lauter R., Lescure J.-M., Mackenzie K., Melo S. T., Melrose R. B., Muhly P., Nazaikinskii V. E., Nazakinski V. E., Nistor V., Victor Nistor   +20 more
core   +6 more sources

Effect of nozzle geometry on critical-subcritical flow transitions

Heliyon, 2019
The geometry of converging-diverging nozzles affects the conditions at which critical-subcritical flow transition occurs. The objective of this work is to develop guidelines to identify the optimum nozzle geometry that maximizes critical pressure ratio ...
Jagmit Singh, Luis E. Zerpa, Benjamin Partington, Jose Gamboa   +3 more
doaj   +1 more source

Billiard in the space with a time machine

, 2010
We study a system of an elastic ball moving in the non-relativistic spacetime with a nontrivial causal structure produced by a wormhole-based time machine. For such a system it is possible to formulate a simple model of the so-called `grandfather paradox'
Dolansky, Jindrich, Krtous, Pavel
core   +1 more source

Shaping Beam Profiles Using Plastic Optical Fiber Tapers with Application to Ice Sensors

Sensors, 2020
Using either bulk or fiber optics the profile of laser beams can be altered from Gaussian to top-hat or hollow beams allowing enhanced performance in applications like laser cooling, optical trapping, and fiber sensing.
Kostas Amoiropoulos, Georgia Kioselaki, Nikolaos Kourkoumelis, Aris Ikiades   +3 more
doaj   +1 more source

Novel Cooling Strategy for a Hybrid Photovoltaic/Parabolic Dish Concentrator

Applied Sciences, 2023
In this paper, the thermo-optical performance using novel cooling strategy improvements for a hybrid photovoltaic/parabolic dish concentrator with a conical thermal receiver using a beam splitter filter (PV/PDC-CTR-BSF) is investigated.
Farooq Saeed, Taher Maatallah, Ahlem Houcine, Arshad Jamal, Sajid Ali   +4 more
doaj   +1 more source

Local extremality of the Calabi-Croke sphere for the length of the shortest closed geodesic [PDF]

, 2009
Recently, F. Balacheff proved that the Calabi-Croke sphere made of two flat 1-unit-side equilateral triangles glued along their boundaries is a local extremum for the length of the shortest closed geodesic among the Riemannian spheres with conical ...
Sabourau, Stephane
core   +4 more sources

An Algorithm for Producing Fuzzy Implications via Conical Sections

Algorithms
In the present study, a novel parametric family of fuzzy implications is introduced and its properties are examined. The parametric family of implications is produced only via a fuzzy negation.
Ioannis Karampinis, Georgios Souliotis, Basil Papadopoulos, Athanasios Karabinis   +3 more
doaj   +1 more source

Adiabatic creation of entangled states by a bichromatic field designed from the topology of the dressed eigenenergies [PDF]

, 2002
Preparation of entangled pairs of coupled two-state systems driven by a bichromatic external field is studied. We use a system of two coupled spin-1/2 that can be translated into a three-state ladder model whose intermediate state represents the ...
A. Sørensen, B.E. King, C.A. Sackett, E. Hagley, E.S. Fry, H. R. Jauslin, H.R. Jauslin, I.V. Bargatin, J.A. Jones, J.I. Cirac, L. P. Yatsenko, L.P. Yatsenko, L.P. Yatsenko, N.V. Vitanov, Q.A. Turchette, R. G. Unanyan, R. Unanyan, R.G. Unanyan, R.G. Unanyan, S. Guérin, S. Guérin, S. Guérin, S. Guérin, T. Pellizzari, T. Rickes   +24 more
core   +2 more sources

Infrared laser sampling of low volumes combined with shotgun lipidomics reveals lipid markers in palatine tonsil carcinoma

Molecular Oncology, EarlyView.
Nanosecond infrared laser (NIRL) low‐volume sampling combined with shotgun lipidomics uncovers distinct lipidome alterations in oropharyngeal squamous cell carcinoma (OPSCC) of the palatine tonsil. Several lipid species consistently differentiate tumor from healthy tissue, highlighting their potential as diagnostic markers.
Leonard Kerkhoff, Manuela Moritz, Dennis Eggert, Anna Worthmann, Joerg Heeren, Henrike Zech, Till S. Clauditz, Waldemar Wilczak, Hartmut Schlüter, Christian S. Betz, Arne Böttcher, Jan Hahn   +11 more
wiley   +1 more source