2,080 research outputs found
Effect of Plasma Irradiation on films
The effect of plasma irradiation is studied systematically on a 4H polytype
(002) oriented stoichiometric film having compressive residual
stress. Plasma irradiation was found to change the orientation to (110) of the
film at certain moderate irradiation distances. A linear decrease in grain size
and residual stress was observed with decreasing irradiation distance (or
increasing ion energy) consistent with both structural and morphological
observations. The direct optical energy gap was found to increase
linearly at the rate with the compressive stress. The
combined data of present compressive stress and from earlier reported tensile
stress show a consistent trend of change with stress. The
iodine-iodine distance in the unit cell could be responsible for the observed
change in with stress.Comment: 13 pages and 10 fi
Vegetation indices mapping for Bhiwani district of Haryana (India) through LANDSAT-7ETM+ and remote sensing techniques
This study describes the VIs Vegetation Condition Index in term of vegetation health of wheat crop; with help of LANDSAT-7ETM+ data based NDVI and LAI for Bhiwani District of Haryana states (India) and gave the spatial development pattern of wheat crop in year 2005 over the study area of India. NDVI is found to vary from 0.3 to 0.8. In northern and southern parts of study area NDVI varied from 0.6 to 0.7 but in western part of Bhiwani showed NDVI 0.2 to 0.4 due to fertility of soil and well canal destitution. LAI showed variation from 1 to 6 accordingto the health of crop as the same manner of NDVI because LAI VI is NDVI dependent only change the manner of representation of vegetation health, due to this fact relation curve (r2=) between NDVI and LAI of four different growing date of sates are in successively increasing order 0.509, 0.563, 0.577 and 0.719. The study reveals that VIs can be mapped with LANDSAT-7ETM+ through remote sensing, which can be further used for many studies like crop yield or estimating evaptranspiration on regional basis for water management because satellite observations provide better spatial and temporal coverage, the VIs based system will provide efficient tools for monitoring health of crop for improvement of agricultural planning. VIs based monitoring will serve as a prototype in the other parts of the world where ground observations are limited or not available
Semi-Automated Image Analysis Methodology to Investigate Intracellular Heterogeneity in Immunohistochemical Stained Sections
The discovery of tissue heterogeneity revolutionized the existing knowledge regarding the cellular, molecular, and pathophysiological mechanisms in biomedicine. Therefore, basic science investigations were redirected to encompass observation at the classical and quantum biology levels. Various approaches have been developed to investigate and capture tissue heterogeneity; however, these approaches are costly and incompatible with all types of samples. In this paper, we propose an approach to quantify heterogeneous cellular populations through combining histology and images processing techniques. In this approach, images of immunohistochemically stained sections are processed through color binning of DAB-stained cells (in brown) and non-stained cells (in blue) to select cellular clusters expressing biomarkers of interest. Subsequently, the images were converted to a binary format through threshold modification (threshold 60%) in the grey scale. The cell count was extrapolated from the binary images using the particle analysis tool in ImageJ. This approach was applied to quantify the level of progesterone receptor expression levels in a breast cancer cell line sample. The results of the proposed approach were found to closely reflect those of manual counting. Through this approach, quantitative measures can be added to qualitative observation of subcellular targets expression
Delayed presentation of intussusception in children–a surgical audit
Background The preferred modality of treatment of intussusception is radiologic reduction; however, the situation is different in our setup, in which surgery is the only possible treatment modality to salvage patients. This study presents the management of patients of intussusception in our setup with delayed presentation, in which surgery becomes necessary to save life.Patients and methods This retrospective study included reviewing the records of all patients having intussusception. The patients were evaluated for their age of presentation, sex, duration of symptoms before presenting to the hospital, type of intussusception, complications of surgery, mortality, and follow-up.Results The study duration was 9 years and included 95 patients. The male-to-female ratio was approximately 2.5 : 1. The mean age at presentation was 3.24 ± 2.49 years. The mean duration of symptoms before presenting to the hospital was 6.08± 1.38 days. The presenting features were vomiting in 95 patients (100%), distension of theabdomen in 67 patients (70.5%), lump in the abdomen in 61 patients (64%), and bleeding per rectum in 10 patients (10.5%). Eighty-six patients (90.5%) had ileocolic or ileoileocolic intussusception. Resection was required in 75 patients (79%). The mortality rate in this study was 10.5%.Conclusion Despite the advances in the diagnosis and treatment of intussusception, a large number of children in the developing world still present very late. Hence, the treating surgeon must be ready to manage this entity effectively. Proper clinical evaluation, resuscitation, and treatment as per the condition of the patients yield good results.Keywords: bowel obstruction, children, delayed presentation, intussusceptions, surger
Seasonal variation of ichthyofauna in trawling grounds off Mangaluru coast, Southwest coast of India
364-372Mangaluru coast, Southwest coast of India has vast aquatic bio-resources and offers considerable scope for marine fisheries development. The present investigation was carried out to assess the ichthyofaunal diversity off Mangaluru coast, Karnataka, India (Lat.12°50'54" N; Long. 74°50'11" E). The data for the study was collected from 160 multiday trawlers operating from Mangaluru fishing harbour during September, 2012 to April, 2013. A total of 97 species belonging to 72 genera, 50 families and 15 orders were recorded. Order Perciformes was the most diversified group having 56 fish species (57.7 %) followed by Clupeiformes 14 fish species (14.4 %), and Tetraodontiformes and Pleuronectiformes with 4 fish species each (4.1 %). The family Carangidae contributed 13.4 per cent of total number of species, followed by Clupeidae (6.2 %) and Engraulidae (5.2 %). Trichiurus lepturus contributed 15.42 per cent of total landing followed by Sardinella longiceps (12.1 %), Nemipterus japonicus (10.7 %), Decapterus russelli (9.9 %), Rastrelliger kanagurta (9.6 %) and Nemipterus randalli (8.4 %). The overall cluster analysis of the Bray-Curtis similarity (hierarchical clustering) shown that maximum similarity (89.7 %) was between March-2013 and April-2013. The study showed that the samples from adjacent months were having more similarity in species composition and abundance. The stress value, which overlying on the MDS plot (0.06), showed greater extent of ordination in the collected samples
Field induced magnetic transition and metastability in Co substituted
A detailed investigation of first order ferrimagnetic (FRI) to
antiferromagnetic (AFM) transition in Co (15%) doped is carried out.
These measurements demonstrate anomalous thermomagnetic irreversibility and
glass-like frozen FRI phase at low temperatures. The irreversibility arising
between the supercooling and superheating spinodals is distinguised in an
ingenious way from the irreversibility arising due to kinetic arrest. Field
annealing measurements shows reentrant FRI-AFM-FRI transition with increasing
temperature. These measurements also show that kinetic arrest band and
supercooling band are anitcorrelated i.e regions which are kinetically arrested
at higher temperature have lower supercooling temperature and vice versa.Comment: 10 pages, 8 figure
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