A study on physico-chemical parameters of Dah lake water, District-Ballia (U.P.), India

The back water of river Saryu is a prime source of water for Dah Lake, located in Ballia district, have been studied to project the pristinety of water with respect to different pollution sensitive parameters i.e. organic pollutants– BOD, DO, COD, Inorganic pollutants - Electrical Conductivity, Turbidity, pH, total alkalinity, Chloride, Total hardness etc. The pH (7.68), total alkalinity (180.5 mg/l), Chloride (133.12 mg/l), Total hardness(139.83 mg/l), Calcium (60.26 mg/l) and Magnesium hardness (19.38 mg/l) were found well within the prescribed standard for drinking water (BIS 10500:1991) during the study period i.e. April 2006- March 2008. The study inferred that the water quality of Dah Lake is still free from the any kind of pollutants, must be due to its higher assimilative capacity. It also indicates the higher potential for pisiculture and drinking water sources (after disinfection) for the nearby villages which may ultimately improve the economic condition of the surrounding habitation

A Review on Image Processing

Image Processing involves changing the nature of an image in order to improve its pictorial information for human interpretation, for autonomous machine perception. Digital image processing is a subset of the electronic domain wherein the image is converted to an array of small integers, called pixels, representing a physical quantity such as scene radiance, stored in a digital memory, and processed by computer or other digital hardware. Interest in digital image processing methods stems from two principals applications areas: improvement of pictorial information for human interpretation; and processing of image data for storage, transmission, and representation for autonomous machine perception. Edges characterize boundaries and edge detection is one of the most difficult tasks in image processing hence it is a problem of fundamental importance in image processing. In this paper investigates different steps of digital image processing.like, a high-speed non-linear Adaptive median filter implementation is presented. Then Adaptive Median Filter solves the dual purpose of removing the impulse noise from the image and reducing distortion in the image. The Image Processing Toolbox software is a collection of functions that extend the capability of the MATLAB numeric computing environment. The toolbox supports a wide range of image processing operations on the given image. Index Terms — Image Enhancement, Feature Extraction

Study of Microstrip filters

Volume 2 Issue 1 (January 2014

A clinico-epidemiological study of hypopigmented and depigmented lesions in children and adolescent age group in Hadoti region (South East Rajasthan)

Background: Hypopigmentory and depigmented lesions are common among children and adolescent group. The parents are very much concerned about the condition and they seek dermatologist advice without fail. Aims and Objectives: To evaluate the Epidemiology and clinical characteristics of Hypopigmented and Depigmented Lesion in patients of Children and Adolescent age group in Hadoti region in Rajasthan. Materials and Methods: The study was conducted for the period one year from April 2015 to March 2016. This planned study is to be undertaken in children age 0-19 yr with hypopigmented and depigmented lesions irrespective of sex. Results: The most common disorder was Pityriasis alba, seen in 27.33%, followed by Pityriasis versicolor in 21%, Vitiligo 19.33%, Post inflammatory hypopigmentation in 14%, Primary disorders of hypopigmentation in 13%, Hansen's disease in 1.33%, and miscellaneous conditions in 4% of the cases. Conclusion: The most common hypopigmentary disorders are seen in our study is Pityriasis alba and other causes of hypopigmentary and depigmentory disorders are in decreasing order are Pityriasis versicolor, Vitiligo, Postinflammatory hypopigmentation, Primary causes of hypopigmentation and less common are Leprosy

Catalytic reduction of 4-nitrophenol using synthesized and characterized CoS@MorphcdtH/CoS@4-MPipzcdtH nanoparticles

CoS@MorphcdtH NPs and CoS@4-MPipzcdtH NPs were synthesized by precip itation method involving three mechanisms: inclusion, occlusion, and adsorp tion. The synthesized NPs were characterized with the help of UV-Vis spectroscopy, FESEM-EDAX, powder x-ray diffraction, TEM, ESIMS, TG/DSC analysis. The morphology of the CoS@MorphcdtH NPs and CoS@4-MPipzcdtH NPs were hexagonal and rectangular, and the particles were in the range 7–12 nm. UV–visible spectral measurements showed surface plasmon reso nance at 320 nm–340 nm with band gap of 3.65 eV–3.86 eV. The catalytically active CoSNPs called were investigated for the reduction of 4-nitrophenol (4-NP) via hydrogenation using sodium borohydride (NaBH4) as a reducing agent. Both the CoS NPs successfully reduced 4-NP to 4- aminophenol (4-AP) in a short time, catalytic performances are almost unchanged for the first five cycles. Herein, we report the preparation and characterizations of efficient active CoS NPs consisting carbodithioic acid framework as a support/capping material, along with catalytic property

Thermal performance enhancement in heat exchangers using active and passive techniques : a detailed review

The objective of this article is to study the work carried out in heat transfer augmentation using active and passive techniques. A comprehensive summary of the work is highlighted to showcase the strength of these techniques in terms of enhancement in heat transfer. In this work, research studies done in the area of electrohydrodynamic, magnetic field, corona wind, vortex generators, tape and coil inserts, roughness, and modified duct were reviewed and an attempt has been made to make a common platform on which the performance enhancement has been compared and presented. It was found out that passive methods are comparatively more investigated than active methods due to their safe and sound operation along with no additional requirement of power. Result shows that duct modification is an effective and efficient way for heat transfer enhancement (HTE). Based on the literature studied, more emphasis must be focussed on the usage of HTE methods in combination to get the advantages of both the methods and they should complement each other in the best possible way. On comparing the active and passive way of THE, results with active methods are more appreciable. However, passive techniques gain more momentum due to ease of operation and low cost of equipment. Use of passive augmentation techniques, i.e. vortex generators, artificial roughness, etc., changes flow pattern significantly that helps in the heat transfer augmentation. Although understanding of fluid flow behaviour is very essential and helps in the cause of the heat transfer augmentation that will further help in using compound techniques, altering the duct’s surface using ribs, dimples, roughness, etc., shows the thermal performance enhancement of more than 200% when the results were compared with the plain channel. The modified duct may be combined with any other passive augmentation technique which will further lead to performance enhancement.https://link.springer.com/journal/10973hj2023Mechanical and Aeronautical Engineerin