598 research outputs found
Annihilation of vortex dipoles in an Oblate Bose-Einstein Condensate
We theoretically explore the annihilation of vortex dipoles, generated when
an obstacle moves through an oblate Bose-Einstein condensate, and examine the
energetics of the annihilation event. We show that the gray soliton, which
results from the vortex dipole annihilation, is lower in energy than the vortex
dipole. We also investigate the annihilation events numerically and observe
that the annihilation occurs only when the vortex dipole overtakes the obstacle
and comes closer than the coherence length. Furthermore, we find that the noise
reduces the probability of annihilation events. This may explain the lack of
annihilation events in experimental realizations.Comment: 8 pages and 9 figure
A kinetic scheme with variable velocities and relative entropy
A new kinetic model is proposed where the equilibrium distribution with
bounded support has a range of velocities about two average velocities in 1D.
In 2D, the equilibrium distribution function has a range of velocities about
four average velocities, one in each quadrant. In the associated finite volume
scheme, the average velocities are used to enforce the Rankine-Hugoniot jump
conditions for the numerical diffusion at cell-interfaces, thereby capturing
steady discontinuities exactly. The variable range of velocities is used to
provide additional diffusion in smooth regions. Further, a novel kinetic theory
based expression for relative entropy is presented which, along with an
additional criterion, is used to identify expansions and smooth flow regions.
Appropriate flow tangency and far-field boundary conditions are formulated for
the proposed kinetic model. Several benchmark 1D and 2D compressible flow test
cases are solved to demonstrate the efficacy of the proposed solver.Comment: 53 page
A rare case of vulval leiomyoma
Vulval leiomyomas are rare smooth muscle tumors that may arise from smooth muscle cells within erectile tissue, blood vessel wall or round ligament remnants in the labia majora and they are clinically misdiagnosed as Bartholin cyst or lipoma. In our case, a 40-year-old woman presented with 8 years history of progressively increasing painless swelling on her vulva. Clinically it was diagnosed as a solid tumour due to its consistency and location. Hence surgical excision was done. Histopathology report was suggestive of leiomyoma with hyaline changes on microscopy. Major diagnostic problem with smooth muscle tumors of the vulva is the distinction between benign and malignant form, since many vulval lesions have similar appearances making it difficult to distinguish benign from malignant lesions by gross inspection. The recommended treatment option is local excision of the mass with pathological examination
EFFICIENT EYE BLINK COMMUNICATION ASSISTANCE FOR PARALYZED PATIENTS
The research study presents a real time method based on some video and image processing algorithms for eye blink detection to voice conversion. The motivation of this study is to help the disabled people who cannot communicate with human. The Haar Cascade Classifier is used for face and eye recognition to gain details about the eyes and facial axes. In comparison, the same classifier is used to assess the relation among the senses like eye and axis of the face to position the eye based on haar like features. This proposes an effective eye detection system which uses the sensed face location. An efficient eye detection method is proposed which uses the position of detected face. Finally, an eye blink detection method is done based on eyelids movement whether it is open or closed and is used for controlling mobile phones. The study have designed a very low-priced device that coverts the eye blinks to voice message with more accuracy compared to existing system. The eye blinks that are detected can be helpful in applications such as health assistance, S.O.S, basic utility. Test results show that our proposed system for a distance of 35cm delivers a overall accuracy of 98% and a detection accuracy of 98
Multiple Myeloma with Subtrochanteric Femur Fracture and Shaft of Humerus Fracturetreated with Single Stage IMIL Nailing: A Case Report
Plasma cell dyscrasia include multiple entities from benign plasmacytoma to malignant multiple myeloma. According to literature, about 45% of patients with multiple myeloma experience a fracture in the first year after diagnosis and 65% of patients experience a fracture during the course of the disease. The pathological fracture requires immediate fixation according to Mirell’s scoring considering the natural course of the disease and short life expectancy associated with multiple myeloma. Here, we would like to specify a case of multiple myeloma with extensive lytic lesions throughout the body, wherein subtrochanteric femur and shaft of humerus required fixation according to Mirell’s scoring (2). We did a single stage intramedullary nailing for subtrochanteric femur fracture and shaft of humerus with 12 and 10 Mirell’s score respectively, with no complications in the outcome with regards to pain and quality of life, the fractures go on to unite well
MOBILE INTEGRATED SMART IRRIGATION SYSTEM USING IoT
Today’s world, the scarcity and usage of water is increasing day by day, it is very much important to conserve water for the future generation. The water requirement is very much needful for irrigation system and at a same time, proper management of water is also very much important with the available sources. Therefore a smart system is essential to manage the same. These papers present a smart system developed for irrigation system using IoT (internet of things). The main purpose of this system is to periodically monitor the soil’s moisture, humidity and temperature levels which are very much required for the crops, based on requirements, the water supply is pumped to the field and at the same time the farmer will receive the real time information to farmer's smart phone
- …