170 research outputs found
EXPERIMENTAL STUDIES OF PRESSURE DISTRIBUTION IN TILTING PAD THRUST BEARING WITH SINGLE CONTINUOUS SURFACE PROFILED SECTOR SHAPED PADS
The effect of the film shape on the load carrying capacity of a hydrodynamically lubricated bearing has not been considered an important factor in the past. Flat faced tapered bearing and the Raileigh\u27s step bearing of constant film thickness have been the primary forms of film shapes for slider bearing studies and design data developments. There are indications in the literature that surface profiling/texturing can have significant and positive influence on the load carrying capacity of hydrodynamic pad thrust bearings. Therefore, the objective of this paper is to compare the experimental results of pressure temperature distributions in slider bearing with flat surface and with different single continuous surface profiled (Cycloidal,Catenoidal,Quadratic) sector shaped pads. Pressure results presented in this paper can provide a platform for validation of theoretical models. An experimental study has been performed to investigate the influence of single continuous surface profiled sector shaped pads in tilting pad thrust bearing. It has been found that with cycloidal shaped surface profiled sector shaped pads the pressure generated within fluid film is enhanced which in turn causes enhancement in load bearing capacity of hydrodynamic bearing
Review on Nanorobot as a Nanomachine and Biomedicine
Nanorobotics is the technology of producing robots or machines with very small scale or Miniscale of a nanometer (10-9 meters), machines constructed at the molecular level (Nano machines) may Be used to detect or identify and cure the human body of its various diseases like cancer. Nano robots are Very good accuracy they perform a specific task with great accuracy and precision at very small scale or Nanoscale dimension. A recent discovery in the field of drug Delivery is target therapy, which improves the diagnostic tests and Medical devices. Nanotechnology is going to revolutionize the world. According to the National Nanotechnology Initiative (NNI). Nowadays these nano robots play a vital role in the field of Bio Medicine. In the pharma-world, the applications of Nanotechnology mean drugs containing nano-sized active ingredients. They are well used to cure HIV, Cancer, Surgery, Bloodstream, gene therapy, Kidney stone removal and other harmful disease they Can restore lost tissue at the cellular level, useful for monitoring, Diagnosing and fighting sickness. The main purpose is to cure many dreadful Diseases in human body
Vibrating Winding Branes, Wrapping Democracy and Stabilization of Extra Dimensions in Dilaton Gravity
We show that, in the context of dilaton gravity, a recently proposed
democratic principle for intersection possibilities of branes winding around
extra dimensions yield stabilization, even with the inclusion of momentum modes
of the wrapped branes on top of the winding modes. The constraints for
stabilization massaged by string theory inputs forces the number of observed
dimensions to be three. We also discuss consequences of adding ordinary matter
living in the observed dimensions.Comment: Added a section discussing the linear and non-linear stability of the
equilibrium point of the scale factors of the extra dimensions. Corrected a
typo in the original field equations and other typos. Added and changed
references. Final version appeared in JHE
Primordial tensor bispectra in ÎĽ-CMB cross-correlations
Theoretical Physic
T and S dualities and The cosmological evolution of the dilaton and the scale factors
Cosmologically stabilizing radion along with the dilaton is one of the major
concerns of low energy string theory. One can hope that T and S dualities can
provide a plausible answer. In this work we study the impact of S and T duality
invariances on dilaton gravity. We have shown various instances where
physically interesting models arise as a result of imposing the mentioned
invariances. In particular S duality has a very privileged effect in that the
dilaton equations partially decouple from the evolution of the scale factors.
This makes it easy to understand the general rules for the stabilization of the
dilaton. We also show that certain T duality invariant actions become S duality
invariance compatible. That is they mimic S duality when extra dimensions
stabilize.Comment: Corrected a misleading interpretation of the S duality transformation
and a wrong comment on d=10. I thank A.Kaya for pointing this out to me in
time. So the new version is dealing with d=10 only. Added references and
corrected some typos. Minor re-editing. Omitted a section for elaboration in
a further study. Corrected further typo
Growth of CaF2 buffer on Si using low energy cluster beam deposition technique and study of its properties
International audienc
Review on Therapeutic Uses of Mimosa Pudica (Touch-me-not) Plant
The prostrate or semi-erect subshrub Mimosa pudica L. (Mimosacee), referred to as touch me not, live and die, shame plant, and humble plant, is indigenous to North and South America as well as Australia. They are delicate soft grey green leaves that fold and droop at night or when handled and chilled, and they are thickly equipped with recurved thorns in India. Its peculiar bending behaviors have given it the nickname "curiosity plant." According to Ayurveda, the root of this plant is bitter, acrid, cooling, vulnerary, and alexipharmic. Leprosy, dysentery, vaginal and uterine complaints, inflammations, burning sensations, asthma, leucoderma, tiredness, and blood disorders are among the conditions it is used to treat. It appears to be a prospective herbal candidate deserving of further research, as shown by its pharmacological profile Numerous illnesses, including cancer, diabetes, hepatitis, obesity, and urinary infections, are also prevented or treated using mimosa pudica. It predominantly contains pharmacological activities that include antibacterial, antivenom, antitertility, anticonvulsant, depressant, aphrodisiac, and others. The plant has been used to treat urogenital issues for ages
Clarifying transfer function approximations for the large-scale gravitational wave background in ΛCDM
Theoretical Physic
D0 Matrix Mechanics: New Fuzzy Solutions at Large N
We wish to consider in this report the large N limit of a particular matrix
model introduced by Myers describing D-brane physics in the presence of an RR
flux background. At finite N, fuzzy spheres appear naturally as non-trivial
solutions to this matrix model and have been extensively studied. In this
report, we wish to demonstrate several new classes of solutions which appear in
the large N limit, corresponding to the fuzzy cylinder,the fuzzy plane and a
warped fuzzy plane. The latter two solutions arise from a possible "central
extension" to our model that arises after we account for non-trivial issues
involved in the large N limit. As is the case for finite N, these new solutions
are to be interpreted as constituent D0-branes forming D2 bound states
describing new fuzzy geometries.Comment: revised version: references added, derivation of "central extensions"
improved upon. To appear in JHE
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