Linear and Nonlinear Optical Properties of Mn doped Benzimidazole Thin Films

In the present work, the Mn doped benzimidazole (BMZ) thin films were prepared by simple chemical bath deposition technique. The material was directly deposited as thin film on glass substrates and the metal concentration in the solution was varied in weight percentage in order to investigate the dopant effect on the properties of thin films. Similarly, the Mn doped BMZ films were deposited in different solution temperature to study the effect of deposition temperature on the properties of thin films. The PXRD and FT-IR spectroscopy are used to study the structural and the presence of functional groups in the BMZ medium. Depending upon the solution temperature, thickness of the films varying from 0.6 to 1.2 {\mu}m and the optical transparency of the samples increases with the increasing temperature up to 50 {\deg}C. Second Harmonic Generation (SHG) efficiency of the films is measured for all the films. Third order nonlinear optical properties of the films were analyzed using Z-scan technique. The experimental results show that Mn doped BMZ films exhibits saturation absorption and negative nonlinearity.Comment: This has been presented in DAE 58th Solid State Symposium held at Thapar University, Patiala, Punjab, India. Will be published in AIP conference proceedings soo

STUDY ON THE ENHANCEMENT OF THE PROPERTIES OF CONCRETE BY OPTIMIZING THE PROPOTIONS OF HYBRID MINERAL ADMIXTURES

Since advent of civilization various types of cementitous materials have been used for constructiuon practices. The arrival of Ordinary Portland Cement changed the construction activities completely. However, because of several drawbacks associated with properties of cement and manufactured building materials using OPC as well as the cost factor attempts one mode to utilize other materials for economical constructions and improved mortar and concrete characteristics. Now attempts were made to utilize these waste materials or industrial byproducts in construction activities to solve the environmental pollution problems, and safer and economical construction. In this paper Fly Ash and Silica Fume has been used as a hybrid mineral admixture as a replacement material for cement..The physical and chemical properties of Fly Ash and Silica Fume has been studied and these materials are replaced for cement by the following proportions 25%F.A-5%S.F, 20%F.A-10%S.F,15%F.A-15%S.F and 10%F.A-20%S.F. Specimens have been casted to determine the mechanical properties such as compressive strength, split tensile strength and flexural strength to find out the optimum proportions of the admixture and durability properties like acid attack, sulphate attack and chloride attack to find out the resistance offered by the mineral admixtures in concrete which can undergo deterioration due to various salts

4-[(E)-(4-Methyl­phen­yl)imino­meth­yl]phenol

In the title compound, C14H13NO, the two rings show significant deviation from coplanarity, with a dihedral angle between the two planes of 49.40 (5)°. The hy­droxy group is involved in an inter­molecular O—H⋯N hydrogen bond, forming an extended one-dimensional zigzag chain along (001)

4-Bromo-N-(4-hy­droxy­benzyl­idene)­aniline

In the title compound, C13H10BrNO, the benzene ring planes are inclined at an angle of 48.85 (17)°, resulting in a nonplanar mol­ecule. A characteristic of aromatic Schiff bases with N-aryl substituents is that the terminal phenyl rings are twisted relative to the HC=N plane. In this case, the HC=N unit makes dihedral angles of 11.1 (4) and 38.5 (3)° with the hy­droxy­benzene and bromo­benzene rings, respectively. In the crystal, the molecules are linked by O—H⋯N hydrogen bonds to form infinite (C8) chains along the b axis

Status of brackishwater prawn farming in Andhra Pradesh

Andhra Pradesh is estimated to have 762.51 ha of brackishwater area under prawn culture- Prawn culture In brackishwater ponds as well as in paddy fields converted into prawn ponds is picking up fast In the coastal districts of Andhra Pradesh, especially in East Godavari, Krishna and Guntur districts. There are more than 200 ha of brackishwater areas suitable for prawn culture in West Godavari district alone. IVIore and more are being brought under prawn farming in this district. Seml-lntensive culture technology is employed by the fish farmers. The average yield Is estimated at 450 kg/ha/crop. This paper presents and discusses the status of prawn culture in Andhra Pradesh, identifies the constraints and suggests strategies for bringing the abundantly available brackishwater areas under scientific prawn culture to Increase the yield from these ponds

Economic analysis of prawn culture in Andhra Pradesh - Some preliminary findings

Inadaquate supply of quality seed is one of the chief constraints that impedes the quick development of ptawn culture. Estuaries still remain the largest source of prawn seed supply. They are likely to remain so atleast for sometime in offing before the hatchery production of seeds is undertaken commercially and massively. The Marine Products Export development Authority assists the prawn farmers in setting up prawn seed banks by providing technical assistance on prawn culture, undertaking site selection and farm surveys, preparing project reports for submitting to the banks to get financial assistance, releasing subsidy to the tune of 16% on the capital cost of the project and providing continued technical assistance throughout the culture period. Already some prawn farmers have started establishing such prawn seed banks and supplying prawn seed commercially. This paper presents and discusses results of case studies on the economic feasibility of setting up prawn seed banks by fish farmers/prawn farmers

Extension service for prawn farming

The technology of prawn culture in India is still traditional and extensive called trapping-cum-holding in brackish water ponds, but adoption of Improved extensive prawn culture technology Is claimed to be picking up fast In several places notably In West Bengal, Kerala, Andhra Pradesh and Orissa. The production from such culture practices is estimated at 15000-17000 tons/year, accounting for about 5% of the total prawn production In India the technology of scientific prawn culture is now available. Though steps are being taken to motivate, and encourage the fish farmers to take up prawn culture on scientific lines to increase their Income, lack of an appropriate extension network Is felt to be a major handicap In the field. This paper attempts to review the various extension services available for taking up prawn culture by the fish farmers. Identifies the pitfalls and proposes a working fisheries extension programme for prawn culture In Indi

Design and Perception of a Social Robot to Promote Hand Washing Among Children in a Rural Indian School

We introduce “Pepe”, a social robot for encouraging proper handwashing behaviour among children. We discuss the motivation, the robot design and a pilot study conducted at a primary school located in the Western Ghats mountain ranges of Southern India with a significant presence of indigenous tribes. The study included individual & group interviews with a randomly selected sample of 45 children to gauge their perception of the Pepe robot across various dimensions including gender, animacy & technology acceptance. We also discuss some HRI implications for running user studies with rural children

Influencing Hand-washing Behaviour with a Social Robot: HRI Study with School Children in Rural India

The work presented in this paper reports the influence of a social robot on hand washing behaviour on school children in rural India with a significant presence of indigenous tribes. We describe the design choices of our social robot to cater the requirements of the intervention. The custom built wall mounted social robot encouraged 100 children to wash their hand at appropriate time (before meal and after toilet) using the correct handwashing technique via a poster on a wall. The results indicate that the intervention using the robot was found to be effective (40% rise) at increasing levels of hand washing with soap and with a better handwashing technique in ecologically valid settings