Government College

About: Government College is a based out in . It is known for research contribution in the topics: Population & Ring (chemistry). The organization has 4481 authors who have published 5986 publications receiving 57398 citations.

Medical Image Retrieval by Combining Low Level Features and DICOM Features

Abstract: Content based image retrieval aims at searching the image databases using non-textual information which are low level features like color, shape and texture. Medical image databases contain lot of textual or semantic information. This paper presents an approach by combining low level content features and high level semantic features to perform retrieval on medical image databases. The semantic information is extracted from DICOM header which is used to perform the initial search and images are retrieved. This pre-filtering of the images reduces the number of images to be searched. Content-based retrieval is performed only to the pre filtered image database which speeds up the retrieval process. Retrieval is performed by extracting shape and texture features. Experimental result shows that by combining the high level semantics (DICOM features) and low level content features (shape and texture) the retrieval time is reduced and the performance of medical image retrieval is increased.

[Bu3NH][HSO4] catalyzed: an eco-efficient synthesis of 1H-pyrazolo[1,2-b]phthalazine-5,10-diones and 2H-indazolo[2,1-b]phthalazine-triones under solvent-free conditions

Abstract: A Bronsted acidic ionic liquid [Bu3NH][HSO4] as an eco-efficient catalyst for the one-pot multicomponent synthesis of 1H-pyrazolo[1,2-b]phthalazine-5,10-diones and 2H-indazolo[2,1-b]phthalazine-triones by using various aldehyde, malononitrile/dimedone, and phthalhydrazide in the absence of a solvent at 80 °C is described. Further, the catalyst is prepared from readily available reagents and fully characterized by different techniques such as FT-IR, 1H-NMR, 13C-NMR, and TG, DTG and DTA analyses. The current synthetic protocol offers the mild reaction conditions, short reaction times (9–30 min), excellent yields of the products (83–95%), a clean and straightforward work-up, reusability of the catalyst up to seven catalytic runs, and a sustainable alternative to the existing methods.

Thermo-hydrodynamics of closed loop pulsating heat pipe: an experimental study

Abstract: The experimental result on the thermal performance of closed loop pulsating heat pipe (CLPHP) is presented. The CLPHP is made of copper capillary tubes, having inner and outer diameters of 2.0 mm and 3.6 mm respectively. The working fluids employed are water, ethanol, methanol and acetone also binary mixture (1:1 by volume) of water-ethanol, water-methanol and water-acetone. For all experimentations, filling ratio (FR) 50%, two-turns and vertical bottom heat mode position was maintained. The lengths of evaporator, condenser and adiabatic section are selected as 42 mm, 50 mm and 170 mm, respectively. The transparent adiabatic section is partially made of glass tube having length 80 mm, for flow visualization. The CFD analysis by VOF model in Star CCM+ simulation is carried out to validate the experimental results. The result shows that the thermal resistance decreases smoothly up to 40W heat input, thereafter reasonably steady. In comparison with all working fluids, water-acetone binary working fluid has shown the best thermal performance over other working fluids used in CLPHPs.