Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 25 for “"Contact interaction"”.
-
Nonlinear material modeling and finite element analysis of V-ribbed belts
… element model was built to study the belt-pulley contact interaction."--Abstract, page iv.
-
MULTI-SCALE DYNAMICS OF MECHANICAL SYSTEMS WITH FRICTION
Contact between rough surfaces occurs in numerous engineering systems and in many instances influences the macro behavior of the system. In many instances, the interaction between rough surfaces, affect the macro behavior of the system. Effective treatment of systems containing rough surface …
-
Electron-positron annihilation into photons at √s = 50 to 64 GeV
… for electron compositeness through an e⁺e⁻ γγ contact interaction is conducted, and limits are presented. A search for the pair production of unstable photinos is also presented with limits. Finally, the result of a search for anomalous γγ production is presented, based upon energy scan data …
-
Quantitative evaluation of thin film adhesion using the probe test
… approach and surface-based contact interaction analysis in ABAQUS. The results obtained using thick plate-large deflection formulation correlated with finite element contact interaction analysis results. The probe test can be used with transparent or opaque coatings and thus …
-
Structural Design of a Crashworthy Energy Absorbing Passenger Seat For a Large Transport Aircraft Using Large Displacement, Nonlinear Material Finite Element Analysis
… a dummy model and the seat is modeled using a contact interaction algorithm. This algorithm did not converge and multiple-point constraints were used to transfer the dummy's inertia load. This approach was validated with the software SOMTA and then used to predict the response of a high energy …
-
Search For Contact Interactions Using The Dimuon Mass Spectrum In P-P Collisions At Sqrt(s) = 8 Tev At Cms
… of compositeness can be a four-fermion contact interaction. The experimental signal for contact interactions is a non-resonant enhancement of the number of events in the high-mass region of the dimuon mass spectrum. This dissertation describes a detailed search strategy for contact …
-
High resolution spectroscopy of the Vanadium oxide B⁴ [pi] -X⁴ [sigma] ⁻ (0,0) Band
… to be (4sσ)¹(3dδ)² because of the large Fermi contact interaction which arose from an unpaired electron having primarily metal 4s atomic orbital character. The transition frequencies were fit to a model which included the rotational, fine and hyperfine structure of the B⁴Π, X⁴Σ⁻, and a²Σ⁺ …
-
Particle microstructure and polymer dynamics in concentrated polymer solutions
… mixtures. The effects of polymer induced interactions on the particle microstructure are examined with varying (i) polymer concentration, (ii) solvent type, (iii) temperature, (iv) particle volume fraction and (v) polymer chemistry while polymer-to-solvent volume ratio is held between 0.45 …
-
Search for contact interactions in the dimuon channel in p-p collisions at sqrt(s) = 7 tev at cms
… more basic constituents, a new physics </p> <p>interaction in the form of a four-fermion contact interaction </p> <p>arises between them. Experimentally the signal is manifest as </p> <p>a deviation from the SM prediction in the high-mass tail for </p> <p>the invariant mass distribution of the …
-
Bhabha scattering in e⁺e⁻ collisions at TRISTAN
… is also compared with various four-fermion contact interaction models, and confidence level lower limits on the composite scale, A, are determined. In addition, the limits on VV model are converted to SM-break-down scales, which indicate the validity of the SM down to the distance of order ~ …
-
Experimentation of Mode I and Mode II Fracture of Uni-Directional Composites and Finite Element Analysis of Mode I Fracture Using Cohesive Contact
… as to studying the success of cohesive surface contact for accurately modeling coupon level fracture testing. Cohesive contact interaction in Abaqus/Standard was used to simulate the mode I double cantilever beam (DCB) experiment of ASTM D5528. Cohesive contact was found to accurately and …
-
Interacting Fermi Gases
… of accurate model potentials for the dipolar and contact interactions, as found in various ultracold atomic gas experiments, and a new form of Jastrow correlation factor that interpolates between the radial symmetry of the inter-electron Coulomb potential at short inter-particle distances, and the …
-
Proliferation and morphology of pre-osteoblast cells on 25 – 1000 micron diameter patterned features on polyacrylamide hydrogels
… proliferation, cell maturation, and cell-cell contact/interaction. In this work, microcontact printing is used to pattern 19 kPa hydrogel substrates with 1000, 500, 250, 100, 50, and 25 micron diameter circles of fibronectin and collagen. Experiments were conducted in which cell proliferation …
-
Design optimization for 2-D granular media with dissipation
… maximize the reaction force at the desired bead contacts. Two design approaches are presented: introducing interstitial beads and prescribing initial plastic compression in the system. Using the intruders presence or lack thereof as the design variable is a discrete optimization problem. It is …
-
Wave propagation in one dimensional confined granular media
… have unique dynamic properties arising from the contact interaction of their individual grain constituents. A primary result of this contact, the formation of solitary waves in dynamically loaded one dimensional granular arrays, has been studied at great length. This thesis is the first to …
-
Correlated dynamics of quantum wires and cigar shaped atomic gases
… of charge and spin dynamics <br>on the interactions in different manifestations of 1D Fermi systems. <br>We are especially interested in the system's spin sector, which, <br>contrary to folklore, gets modified by electron- electron interactions. <br>To do so we describe the system's …
-
Low-dimensional quantum systems
… extended t-V model of fermions with interactions of finite range is investigated. The model exhibits a phase transition between liquid and insulating regimes. We use various analytical approaches to generalise previous theoretical studies. We devise a strong coupling expansion to go …
-
Studies on the Maturation of Secreted Quorum Sensing Peptides That Regulates S. Aureus Virulence
… relationships underlying the AIP-AgrC interaction. The defining structural feature of the AIP is a 16-membered, thiolactone-containing macrocycle. However, the importance of ring size on agr activation or inhibition has not been explored. This deficiency is addressed through the …
-
Theory of Bilayer Graphene Spectroscopy.
… show that this amplitude is different from the contact interaction amplitude obtained within the two-band model alone. We then calculate the spectral density of the inelastic light scattering accompanied by the excitation of electron-hole pairs in bilayer graphene. In the absence of a magnetic …
-
Solid state NMR studies of oxide superconductors and related materials
… mechanisms are dominated by the s-wave Fermi contact interaction and manifest nearly ideal Korringa behavior. For La$\sb{1.85}$Sr$\sb{0.15}$CuO$\sb4$, La$\sb{1.85}$Ca$\sb{0.15}$CuO$\sb4$, and Bi$\sb2$Sr$\sb2$CuO$\sb6$, the CuO$\sb2$ $\sp{17}$O NMR resonances are temperature dependent for all …
Page 1 of 2