The third-order law for increments in magnetohydrodynamic turbulence with constant shear

We extend the theory for third-order structure functions in homogeneous incompressible magnetohydrodynamic (MHD) turbulence to the case in which a constant velocity shear is present. A generalization is found of the usual relation [Politano and Pouquet, Phys. Rev. E, 57 21 (1998)] between third-order structure functions and the dissipation rate in steady inertial range turbulence, in which the shear plays a crucial role. In particular, the presence of shear leads to a third-order law which is not simply proportional to the relative separation. Possible implications for laboratory and space plasmas are discussed

Caging phenomena in reactions: Femtosecond observation of coherent, collisional confinement

We report striking observations of coherent caging of iodine, above the B state dissociation threshold, by single collisions with rare gas atoms at room-temperature. Despite the random nature of the solute–solvent interaction, the caged population retains coherence of the initially prepared unbound wave packet. We discuss some new concepts regarding dynamical coherent caging and the one-atom cage effect

Generation of non-Gaussian statistics and coherent structures in ideal magnetohydrodynamics

Spectral method simulations of ideal magnetohydrodynamics are used to investigate production of coherent small scale structures, a feature of fluid models that is usually associated with inertial range signatures of nonuniform dissipation, and the associated emergence of non-Gaussian statistics. The near-identical growth of non-Gaussianity in ideal and nonideal cases suggests that generation of coherent structures and breaking of self-similarity are essentially ideal processes. This has important implications for understanding the origin of intermittency in turbulence

Mechanical and rheological properties of selected varieties of peppers.

Stress-relaxation rates for eight varieties of peppers were measured. The specimens were loaded at 454,907 and 1361 grams and allowed to relax for time periods of 3.8 and 30 minutes. Stress levels used were 914, 1828 and 2741 gm/cm2. Floral Gem and Jalapeno varieties of peppers received the most attention

Possible origin of the 0.5 plateau in the ballistic conductance of quantum point contacts

A non-equilibrium Green function formalism (NEGF) is used to study the conductance of a side-gated quantum point contact (QPC) in the presence of lateral spin-orbit coupling (LSOC). A small difference of bias voltage between the two side gates (SGs) leads to an inversion asymmetry in the LSOC between the opposite edges of the channel. In single electron modeling of transport, this triggers a spontaneous but insignificant spin polarization in the QPC. However, the spin polarization of the QPC is enhanced substantially when the effect of electron-electron interaction is included. The spin polarization is strong enough to result in the occurrence of a conductance plateau at 0.5G0 (G0 = 2e2/h) in the absence of any external magnetic field. In our simulations of a model QPC device, the 0.5 plateau is found to be quite robust and survives up to a temperature of 40K. The spontaneous spin polarization and the resulting magnetization of the QPC can be reversed by flipping the polarity of the source to drain bias or the potential difference between the two SGs. These numerical simulations are in good agreement with recent experimental results for side-gated QPCs made from the low band gap semiconductor InAs

Ellipsometric measurements of the refractive indices of linear alkylbenzene and EJ-301 scintillators from 210 to 1000 nm

We report on ellipsometric measurements of the refractive indices of LAB-PPO, Nd-doped LAB-PPO and EJ-301 scintillators to the nearest +/-0.005, in the wavelength range 210-1000 nm.Comment: 7 pages, 4 figure

Incorporation of Pleurotus sajor-caju powder in cinnamon biscuit: study on nutritional, physical, colour and sensorial properties

Discovery of novel dietary fibre (DF)-rich food ingredient is of great interest to meet the rising consumer demand for healthy food. Intake of DF-enriched food has been positively associated with a decreased risk of chronic diseases. Pleurotus sajor-caju (PSC), one of the prominent edible mushrooms widely cultivated in Malaysia, is useful for its culinary and medicinal purpose. This study aimed to determine the nutritional, physical, colour and sensorial properties of cinnamon biscuit formulated with PSC powder as partial replacement (0, 4, 8 and 12%) for wheat flour. Results indicated that elevated incorporation levels of PSC powder significantly (P<0.05) increased nutritional values of cinnamon biscuits; with 12% PSC cinnamon biscuit recorded the highest DF (9.84%), protein (7.85%) and ash (1.00%) content. In texture profile analyses, slight increment in firmness and reduction in crispiness of the cinnamon biscuits were detected with increasing levels of PSC powder. PSC-enriched cinnamon biscuits were reported to have lower L* value (ranged from 65.49 to 69.25) compared to control cinnamon biscuit (70.84), indicating darker surface colour. In comparison to control cinnamon biscuit, incorporation of PSC powder up to 8% produced higher scores in term of aroma, colour and appearance. In summary, incorporation of 8% PSC powder could be an effective way to develop nutritious cinnamon biscuit without jeopardizing its desirable physical and sensorial properties

Calculation of some properties of the vacuum

In this article, we calculate the dressed quark propagator with the flat bottom potential in the framework of the rain-bow Schwinger-Dyson equation, which is determined by mean field approximation of the global colour model lagrangian. The dressed quark propagator exhibits a dynamical symmetry breaking phenomenon and gives a constituent quark mass about 392 MeV, which is close to the value of commonly used constituent quark mass in the chiral quark model. Then based on the dressed quark propagator, we calculate some properties of the vacuum, such as quark condensate, mixed quark condensate $g_{s}< 0|\bar{q}G_{\mu\nu}\sigma^{\mu\nu}q|0>$, four quark condensate $<0|\bar{q} \Gamma q\bar{q} \Gamma q |0>$, tensor, $\pi$ vacuum susceptibilities. The numerical results are compatible with the values of other theoretical approaches.Comment: 10 pages, 2 figures, 3 tables, some writing errors are correcte

The Theatre of Punishment: Case Studies in the Political Function of Corporal and Capital Punishment

Michel Foucault famously argued that punishment was an expression of power—a way for the State to shore up and legitimize its political authority. Foucault attributed the historical shift away from public torture and corporal punishment, which occurred during the 19th century, to the availability of new techniques of social control; however, corporal and capital punishment (what we term “shock punishment”) persists in many penal systems to this day, suggesting that these countries have for some reason not fully undergone this penal evolution. Using the experiences of Hong Kong and Singapore as case studies, we attempt to explain why this is the case. We argue that, while a range of factors contribute to why countries employ shock punishment, retention is often linked to the political stability of a government’s rule. Punishment, as a visceral expression of power, makes shock punishment particularly appealing to States grappling with political insecurity. In the post-war period, Hong Kong’s colonial government did not feel their rule challenged to the same extent as the newly independent government in Singapore. The result is two radically divergent stories with regards to corporal punishment, with Hong Kong abolishing the practice altogether in 1991 and Singapore not only retaining it, but greatly expanding its usage. As further support for our thesis, we offer empirical data regarding the use of shock punishment and the political freedom of the societies that retain it. We identify a fairly robust, positive correlation between the use of shock punishment and authoritarian and semi-authoritarian governments desperate to legitimize their rule. The final conclusion we reach is that, while many factors undoubtedly contribute to the retention of shock punishment, its expressive power plays a significant role in why many States continue to employ it