Optoelectronic sampling is the ultimate method to perform ultra-high frequency analog-to-digital conversion. Thanks ps photo-thermo-bolometric effect in high mobility hexagonal boron nitride (h-BN) encapsulated graphene, a state-of-the-art optoelectronic sampler over 40 GHz bandwidth using 4 pulsed laser demonstrated. The superior transport and linearities of this graphene lead very harmonic re...

Dispersion, as the characteristic variation of refractive index with wavelength, is more pronounced, where the wavelength is approaching to the absorption band. In ultra-optical glasses, the nonlinear refractive index, concerning to the light intensity dependent phenomenon, becomes considerable. Here, two ultra-optical property glass systems; TiO2-Bi2O3-PbO (TBP...

Implicit pressure-explicit saturation method (IMPES) is widely used in oil reservoir simulation to study the multiphase flow in porous media. This method has no complexity compared to the fully implicit method, although both of them are based on the finite difference technique. Water coning is one the most important phenomenon that affects the oil production from oil reservoirs having a water d...

The variety of semiconductor materials has been extended in various directions, for example, to very wide bandgap materials such as oxide semiconductors as well as to amorphous semiconductors. Crystalline β-Ga2O3 is known as a transparent conducting oxide with an ultra-wide bandgap of ~ 4.9 eV, but amorphous (a-) Ga2Ox is just an electrical insulator because the combination of an ultra-wide ban...

Asymmetric magnetization reversal is an unusual phenomenon in antiferromagnet/ferromagnet (AF/FM) exchange biased bilayers. We investigated this phenomenon in a simple model system experimentally and by simulation assuming inhomogeneously distributed interfacial AF moments. The results suggest that the observed asymmetry originates from the intrinsic broken symmetry of the system, which results...

Study on the technology that sidetracking horizontal wells with ultra-short radius to select boundary layer has certain practical meaning. But recently this kind of research, especially the study on sidetracking position for horizontal well, is less or even none. In this paper, on the basis of the potential superposition method and the equivalent flowing resistance method, the cumulative oil pr...

We report the observation of mobility classi"cation breakdown due to strong space-charge e!ects during nanoparticle processing in a radial di!erential mobility analyzer (DMA). A simple dimensionless group, the space-charge number, is introduced to help identify the conditions for which this phenomenon becomes important. Our analysis suggests a fewDMAdesign features and operation conditions that...

Experiments have been made on the production of mutations by irradiation with monochromatic ultra violet light. The basic object of the experiments was to see whether thresholds exist in this phenomenon of the type familiar in photo-chemical reactions. If such thresholds can be demonstrated, a technique of analysis of biological material might be opened up similar to that used by the physicist ...