Browsing by Subject "Stresses"

Article

Direct numerical simulation of particle laden flow in a human airway bifurcation model

Stylianou, F. S.; Sznitman, J.; Kassinos, Stavros C. (2016)

During the delivery of inhaled medicines, and depending on the size distribution of the particles in the formulation, airway bifurcations are areas of preferential deposition. Previous studies of laminar flow through airway ...

Article

Double Networks Based on Amphiphilic Cross-Linked Star Block Copolymer First Conetworks and Randomly Cross-Linked Hydrophilic Second Networks

Rikkou-Kalourkoti, Maria D.; Kitiri, E. N.; Patrickios, Costas S.; Leontidis, Epameinondas; Constantinou, Martha; Constantinides, G.; Zhang, X. K.; Papadakis, Christine M. (2016)

This study presents the preparation and characterization of double networks (DN) based on a first amphiphilic polymethacrylate conetwork (APCN) and a second polyacrylamide network. The APCN first network comprised ...

Conference Object

Effects of stress on fricatives: Evidence from Standard Modern Greek

Themistocleous, Charalambos; Savva, Angelandria; Aristodemou, Andrie (International Speech and Communication Association, 2016)

This study investigates the effects of stress on the spectral properties of fricative noise in Standard Modern Greek (SMG). Twenty female speakers of SMG participated in the study. Fricatives were produced in stressed and ...

Article

Evolution of osmotic pressure in solid tumors

Voutouri, C.; Stylianopoulos, T. (2014)

The mechanical microenvironment of solid tumors includes both fluid and solid stresses. These stresses play a crucial role in cancer progression and treatment and have been analyzed rigorously both mathematically and ...

Article

Experimental measurements and mathematical modeling towards quantification of brain swelling stress

Angeli, S.; Stylianopoulos, T. (2017)

Traumatic brain injury results in brain tissue swelling which can be a life threatening condition due to skull confinement. While previous efforts successfully measured the exhibited volume change in brain tissue swelling, ...

Conference Object

Mechanical stress regulates tissue oxygenation, cancer cell proliferation and drug delivery during progression of solid tumors

Mpekris, F.; Angeli, S.; Pirentis, A. P.; Stylianopoulos, T. (Springer Verlag, 2016)

Oxygen supply plays a central role in cancer cell proliferation. While vascular density increases at the early stages of carcinogenesis, mechanical solid stresses developed during growth compress tumor blood vessels and, ...

Article

Microstructure-based, multiscale modeling for the mechanical behavior of hydrated fiber networks

Barocas, V. Η; Chandran, P. L.; Stylianopoulos, T. (2008)

A multiscale formulation is derived for the mechanics of a dilute fiber network microstructure, as occurs in in vitro reconstituted collagen gels, to accommodate the deterministic solution of a uniform-stress condition in ...

Conference Object

Numerical simulation of injection mold filling for semi-solid materials

Ahmed, Alauddin; Alexandrou, Andreas N. (ASME, 1995)

Processing of metals and metal matrix composites in the semi-solid state is an emerging new technology and is becoming increasingly popular. This method provides several advantages over the traditional liquid state processing ...

Article

One-point modelling of rapidly deformed homogeneous turbulence

Reynolds, W. C.; Kassinos, Stavros C. (1995)

Turbulent stresses introduced by Osborne Reynolds do not, by themselves, provide an adequate tensorial base for one-point modelling of rapidly distorted turbulence because they do not carry critical information about the ...

Article

Rapid shear of initially anisotropic turbulence in a rotating frame?

Akylas, Evaggelos; Kassinos, Stavros C.; Langer, C. A. (2007)

In the present study, we investigate, using inviscid rapid distortion theory, the evolution of sheared turbulence in a rotating frame as a function of the rotation rate (including stable, transitional, and unstable regimes), ...

Article

Sensing CPU Voltage Noise Through Electromagnetic Emanations

Hadjilambrou, Z.; Das, S.; Antoniades, Marcos A.; Sazeides, Y. (2018)

This work proposes sensing CPU voltage noise through wireless electromagnetic (EM) emanations from the CPU. Compared to previous voltage monitoring methodologies, this approach is not intrusive as it does not require direct ...

Article

Singular finite elements for the sudden‐expansion and the die‐swell problems

Georgiou, Georgios C.; Schultz, W. W.; Olson, L. G. (1990)

The singular finite element method is used to solve the sudden‐expansion and the die‐swell problems in order to improve the accuracy of the solution in the vicinity of the singularity and to speed up the convergence. The ...

Article

The Solid Mechanics of Cancer and Strategies for Improved Therapy

Stylianopoulos, T. (2017)

Tumor progression and response to treatment is determined in large part by the generation of mechanical stresses that stem from both the solid and the fluid phase of the tumor. Furthermore, elevated solid stress levels can ...

Article

Stress-mediated progression of solid tumors: effect of mechanical stress on tissue oxygenation, cancer cell proliferation, and drug delivery

Mpekris, F.; Angeli, S.; Pirentis, A. P.; Stylianopoulos, T. (2015)

Oxygen supply plays a central role in cancer cell proliferation. While vascular density increases at the early stages of carcinogenesis, mechanical solid stresses developed during growth compress tumor blood vessels and, ...

Article

Thermoelectric properties of nanocrystalline PbTe synthesized by mechanical alloying

Papageorgiou, Ch; Hatzikraniotis, E.; Lioutas, Ch B.; Frangis, N.; Valassiades, O.; Paraskevopoulos, K. M.; Kyratsi, Theodora (2010)

In this work, nanocrystalline lead telluride powder was synthesized from high-purity elements by mechanical alloying by means of a planetary ball-milling procedure. The milling medium was tungsten carbide, and the diameter ...