7,763 research outputs found
Numerical program for analysis of three-dimensional supersonic exhaust flow fields (CHAR 3D)
Choice of reference plane orientation depends on specific nozzle geometry, with different configurations requiring different reference plane systems. In addition, for given configuration several reference systems may be used in different regions of flow field, so each system is locally aligned with flow
MANASIKA VEGAS: THEIR CAUSES, EFFECTS AND PSYCHO SPIRITUAL TREATMENT
Manasika Vega is the intensification of Dharaniya Vega Kama, Krodha, Lobha, Mada, Matsarya, etc. This happens due to the intensification of Raga and Dvesha, which is triggered by the vitiation of Rajas and Tamas due to Asatmyaendriyartha Samyoga, Prajnaparadha and Parinama. When Raga and Dvesha get intensified, it leads to strengthening of desires, which in turn leads to a series of associated emotions of anger, fear, greed, delusion, etc. Scriptures identify Manasika Vega as a disease in themselves because they affect the functioning and health of the mind when left unchecked and divert the mind from the purpose of life which is the pursuit of the fourfold goals of Dharma, Artha, Kama and Moksha. As a result, they cause an imbalance in the three legs of life body, mind and soul, leading to physiological diseases, psychological diseases and Vasanas, that are the impressions from previous births which affects health as well. Therefore, Ayurvedic and Allied Scriptures recommend addressing the root cause, controlling the senses, cleaning the mind and the intellect through lifestyle modification, diet and psycho spiritual practices. These practices are listed in several different scriptures at philosophical and practical levels and need regular practice to have an effect. With regular practice aimed at restoring Sattva, the third Guna that is considered the purest, Rajas and Tamas can be destroyed, leading to detachment to sensorial pleasures and a steady, well-regulated and healthy mind
Evidence of 1D behaviour of He confined within carbon-nanotube bundles
We present the first low-temperature thermodynamic investigation of the
controlled physisorption of He gas in carbon single-wall nanotube (SWNT)
samples. The vibrational specific heat measured between 100 mK and 6 K
demonstrates an extreme sensitivity to outgassing conditions. For bundles with
a few number of NTs the extra contribution to the specific heat, C,
originating from adsorbed He at very low density displays 1D behavior,
typical for He atoms localized within linear channels as grooves and
interstitials, for the first time evidenced. For larger bundles, C
recovers the 2D behaviour akin to the case of He films on planar
substrates (grafoil).Comment: 4 pages, 3 figures, submitted to Phys. Rev. Let
Nonequilibrium fluctuation-dissipation relations for one- and two-particle correlation functions in steady-state quantum transport
We study the non-equilibrium (NE) fluctuation-dissipation (FD) relations in
the context of quantum thermoelectric transport through a two-terminal
nanodevice in the steady-state. The FD relations for the one- and two-particle
correlation functions are derived for a model of the central region consisting
of a single electron level. Explicit expressions for the FD relations of the
Green's functions (one-particle correlations) are provided. The FD relations
for the current-current and charge-charge (two-particle) correlations are
calculated numerically. We use self-consistent NE Green's functions
calculations to treat the system in the absence and in the presence of
interaction (electron-phonon) in the central region. We show that, for this
model, there is no single universal FD theorem for the NE steady state. There
are different FD relations for each different class of problems. We find that
the FD relations for the one-particle correlation function are strongly
dependent on both the NE conditions and the interactions, while the FD
relations of the current-current correlation function are much less dependent
on the interaction. The latter property suggests interesting applications for
single-molecule and other nanoscale transport experiments.Comment: This revised version is now accepted for publication in the Journal
of Chemical Physics (March 2014). arXiv admin note: text overlap with
arXiv:1305.507
Non-Collinear Ferromagnetic Luttinger Liquids
The presence of electron-electron interactions in one dimension profoundly
changes the properties of a system. The separation of charge and spin degrees
of freedom is just one example. We consider what happens when a system
consisting of a ferromagnetic region of non-collinearity, i.e. a domain wall,
is coupled to interacting electrons in one-dimension (more specifically a
Luttinger liquid). The ferromagnetism breaks spin charge separation and the
presence of the domain wall introduces a spin dependent scatterer into the
problem. The absence of spin charge separation and the effects of the electron
correlations results in very different behaviour for the excitations in the
system and for spin-transfer-torque effects in this model.Comment: 6 pages, submitted to Journal of Physics: Conference Series for JEMS
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