Seasonal Variation of Calving in Murrah Buffalo in Bihar

The present study was carried out to estimate the seasonal variation of calving in Murrah buffaloes. The study was conducted in North West alluvial plain of Bihar (Chappra, Siwan and Samastipur), of India on 773 Murrah buffaloes, and these buffaloes were inseminated during June 2010 to December 2014 at BAIF's field Artificial Insemination centres which provide door-step artificial insemination service at village's level. The result indicated that the calving of Murrah buffaloes occurred throughout the year. In Chhapra maximum calving observed in August, i.e. 17% while 14% in October. September and November 13% each. Based on season majority of calving observed between July to January. In Samastipur maximum calving observed in August 16% while in September 14 % followed by November 13% and October month 11%. Based on season majority of calving observed between July to January months. In Samastipur maximum calving observed in August 16% while in September 14% followed by November 13% and October 11%. Based on season majority of calving found between July to January months. It could be concluded that Murrah buffaloes tend to calve more in the days with shorter photoperiod as compared to days with more extended photoperiod

STUDY OF COPPER SULPHATE INDUCED MORTALITY TO FRESHWATER SNAIL, BELLAMYA BENGALENSIS (LAMARCK).

Induced toxicity of copper sulphate to freshwater snail Bellamya bengalensis showed mortality, which increased with increase in concentration and time of exposure to intoxicant. Experimental group of snails were intoxicated by using 1, 2, 3, 4 and 5 ppm concentrations of copper sulphate for 24, 48, 72 and 96 hrs of exposure. Mean LC50 value observed 0.36 ppm and Safe concentration was 0.056 ppm for snail Bellamya bengalensis

A STUDY OF OPTIMIZATION OF DRILLING PROCESS PARAMETERS USING TAGUCHI METHOD

The aim of this work is utilize Taguchi method to investigate the effects of drilling parameters such as spindle speed, feed rate and drill diameter on surface roughness and material removal rate in drilling of gray cast iron using solid carbide tool. The Taguchi method, a powerful tool to design optimization for quality, is used to find optimal cutting parameters. Orthogonal arrays, the signal-to-noise ratio, the analysis of variance are used to analyze the effect of drilling parameters on the quality ofdrilled holes. Number of experiments based on L 9 orthogonal array is conducted using CNC vertical machining centre. Statistical software Minitab18.1 is used to analyze experiment results. ANOVA is used to determine the most significant control factors affecting the surface roughness and material removal rate. ANOVA has shown that the drill diameter has significant role to play in producing higher material removal rate and lower surface roughness. The optimum levels of various parameters obtained in present work for MRR are Spindle speed 800 rpm, feed rate 90 mm/min and Drill diameter is12.7 mm. The optimum levels of various parameters obtained in present work for SR are, Spindle speed 1000 rpm, feed rate 70 mm/min and Drill diameter is 10 mm

DETERMINATION OF OPTIMUM VENTILATION STRATEGY FOR DISPLACEMENT VENTILATED ROOM USING TAGUCHI METHOD

 HVAC engineers, world-wide, are facing challenges related to system design and operation because of development of variety of air distribution systems, innovative diffusers and variations in demand patterns among the ventilation system users. Further, due to the concerns about Indoor Air Quality (IAQ) impact on workers’ health and productivity, newer ventilation strategies which integrate responsive and flexible elements, have grown in popularity for indoor spaces. In this paper attempts are made to develop and implement a practical and robust optimum ventilation strategy, with the aim of helping the building designers and HVAC operators to improve the Indoor Air Quality(IAQ) by reducing the contaminant particle concentrations. Taguchi’s method based on Design of Experiments(DOE) is used along-with actual experimentation in a displacement ventilated “Ventilation Test Roomâ€(VTR). Number of experiments conducted is based on Taguchi method using L9 Orthogonal Array with three level and three factors. The main effect plots for the means for the Particle Removal Efficiency were obtained using Minitab 14 Software. For this study, to evaluate the significance of the parameters in effecting the desired quality characteristic of our interest (i.e. Particle Removal Efficiency), Analysis of variance (ANOVA) was performed keeping the objective “larger is betterâ€. The input parameters considered are air velocity, particle source location and particle size. The results will help in deciding the most influential parameter for highest Particle Removal Efficiency which in turn will help the HVAC system designers and operators in maintaining these parameters and providing clean and healthy indoor air for the occupants

ANALYSIS OF MANUAL WELDING PROCESSES ADOPTED IN FABRICATION OF SEATING BENCHES WITH SPECIAL REFERENCE TO SOLAPUR CITY

A lot of research has been carried out for improving the welding processes which can be used to join the two or more surfaces.Hybrid laser arc welding, electron beam welding in air and Nano Foil joining are recent innovations in welding processes which are yet not accepted to the large extent. But still ,the old methods of welding operations has yet not been properly and fully adopted in small or in medium workstations carrying out fabrication work. There is a need for carrying a research in getting higher productivity and better quality with low cost in the welding processes adopted by these workstations. The workstations where manual welding processes are carried out has not been the attraction for the researchers which retains it at low skilled and poor welding operations. It is found that the welding joints used in making seating benches are of poor quality and a lot of dead stock of broken benches is lying on the top of almost all the educational institutes and even schools. The researcher has tried to carry out fault analysis in the welding processes adopted by the welders at the welding workstations for these benches. It has resulted in some surprising outcomes such as improper use of welding rods, current choice,welding joints, unskilled welders andmethods of observing welding operations. The studyresulted in suggested working methodsto be adopted so as to improve the welding operations without increase in the cost

PARAMETRIC OPTIMIZATION FOR IMPROVED SURFACE FINISH IN CNC TURNING OPERATION

The parameters affecting the roughness of surfaces produced in the turning process for various materials have been studied by many researchers. Design of experimentswere conducted for the analysis of the influence of the turning parameters such as cutting speed, feed rate and depth of cut on the surface roughness.This paper presents a novel approach for the optimization of machining parameters on turning of thetool work piece combination of the Raw material HCHCr with cemented carbide and CBN tool. The parameters –Speed, Feed and Depth of cut to be maintained for HCHCr weredetermined in terms of optional values or levels for the tool. Historic data wasreferred from the records of the company to understand the effect of introducing variation in the input to realize a given output as a ‘Response’ for surface finish. Statistical data analyzed using ANOVA, DOE and Regression to identify the given machining parameters for the operation. Experimental run conducted for validating the values realized through this Analytical treatment of the data.Experimental outcomes have proved that theresponses in turning process can be enhanced efficiently through this freshapproac