scholarly journals Triangular Curvature Approximation of Surfaces - Filtering the Spurious Mode

2017 ◽  
Author(s):  
Paavo Nevalainen ◽  
Ivan Jambor ◽  
Jonne Pohjankukka ◽  
Jukka Heikkonen ◽  
Tapio Pahikkala
Keyword(s):  
Spurious Mode ◽  
Curvature Approximation

scholarly journals ε-EXPANSION IN QUANTUM FIELD THEORY IN CURVED SPACE–TIME

1998 ◽  
Vol 13 (16) ◽  
pp. 2857-2874
Author(s):  
IVER H. BREVIK ◽  
HERNÁN OCAMPO ◽  
SERGEI ODINTSOV
Keyword(s):  
Field Theory ◽  
Quantum Field Theory ◽  
Space Time ◽  
Quantum Field ◽  
Curved Space ◽  
Njl Model ◽  
Effective Lagrangian ◽  
Special Solutions ◽  
Curvature Approximation ◽  
Symmetric Phase

We discuss ε-expansion in curved space–time for asymptotically free and asymptotically nonfree theories. The existence of stable and unstable fixed points is investigated for fϕ4 theory and SU(2) gauge theory. It is shown that ε-expansion maybe compatible with aysmptotic freedom on special solutions of the RG equations in a special ase (supersymmetric theory). Using ε-expansion RG technique, the effective Lagrangian for covariantly constant gauge SU(2) field and effective potential for gauged NJL model are found in (4-ε)-dimensional curved space (in linear curvature approximation). The curvature-induced phase transitions from symmetric phase to asymmetric phase (chromomagnetic vacuum and chiral symmetry broken phase, respectively) are discussed for the above two models.

scholarly journals Spurious Mode Excitation by Coupling Hole of the Resonant Cavity

1991 ◽  
Vol 111 (12) ◽  
pp. 1105-1106
Author(s):  
Minoru Shimba ◽  
Takashi Sato ◽  
Kazuo Tanaka
Keyword(s):  
Resonant Cavity ◽  
Spurious Mode ◽  
Mode Excitation ◽  
Coupling Hole

Over 10% of ${k}_{\text{eff}}^{{2}}$ Demonstrated by 2-GHz Spurious Mode-Free Sc0.12Al0.88N Laterally Coupled Alternating Thickness Mode Resonators

2019 ◽  
Vol 40 (6) ◽  
pp. 957-960 ◽  
Author(s):  
Nan Wang ◽  
Yao Zhu ◽  
Geng Li Chua ◽  
Bangtao Chen ◽  
Srinivas Merugu ◽  
...  
Keyword(s):  
Spurious Mode ◽  
Thickness Mode

On an Approximate Method of Calculating Pressures on Non-lifting Head Shapes at Supersonic Speeds

1955 ◽  
Vol 6 (1) ◽  
pp. 31-45
Author(s):  
H. K. Zienkiewicz
Keyword(s):  
Method Of Characteristics ◽  
Order Theory ◽  
Stagnation Pressure ◽  
Slender Body Theory ◽  
Pressure Losses ◽  
The Method Of Characteristics ◽  
Curvature Approximation ◽  
Body Theory ◽  
Theory And Experiment ◽  
Good Agreement

SummarySlender-body theory is used to derive the ogive of curvature approximation for very slender, pointed, convex head shapes at supersonic speeds. Results of application of this approximation, together with the λ-method for circular arc ogives, to a variety of non-slender head shapes show very good agreement with the method of characteristics, van Dyke's second-order theory and experiment. Good agreement with the method of characteristics and with experiment is obtained even in cases when the stagnation pressure losses across the nose shock wave are not negligible.

Spurious Mode Free 3.5GHz AlN Plate Mode Resonator with High FoM

2018 ◽  
Author(s):  
Nan Wang ◽  
Yao Zhu ◽  
Geng Li Chua ◽  
Bangtao Chen ◽  
Merugu Srinivas ◽  
...  
Keyword(s):  
Spurious Mode ◽  
Mode Resonator
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