Multi Objective Optimization of Cutting Parameters in Turning Operation to Reduce Tool Vibration and Cutting Forces

In this project work we determine the optimal setting of cutting parameters cutting speed (N) , depth of cut(d) , feed(f) and principal cutting edge angle (Ö) of the tool to get a minimum cutting force and tool vibration. In this project dry turning SS304 of diameter 30mm as a work piece and carbide insert tool (SCMT 09T308-TN5120) is done in an automatic lathe. The range of cutting parameters are cutting speed(13.18, 20.724,33.912m/min) ,feed rate(0.105,0.16,0.25 mm/rev), depth of cut(0.5,0.6,0.7mm) and the angle (78,66,62 degree). This study highlights the use of Grey logic and use of Taguchi design to optimize the multi response in turning operation. For this purpose Taguchi design of experiment was carried out to collect the data for tool vibration and cutting forces. The result shows the optimum values of the input parameters and a confirmatory test is held to confirm the results

Studies on Foraging Behaviour of Honeybees on Flowers of Rapeseed Crop

This paper represents foraging behaviour of honeybees on the flowers of rapeseed crop; Apis cerana indica started foraging at 07.10hr and ceased their foraging activity at 17.25hr. Thus, the duration of foraging activity was 10.15hr which was maximum foraging period, followed by A. florea (08.00hr to 05.00hr and 09.00hr) and A. dorsata (07.50hr to 03.00hr and 07.10hr) respectively. A. cerana indica spent maximum time of 6.57 ± 0.43 sec/flower followed by A. dorsata 6.55 ± 0.26 sec/flower and and A. florea 4.4 ± 0.27 sec/flower. Maximum number of flowers visited by A. dorsata of 11.3 ± 2.3 flowers/ min then A. cerana indica of 9.7 ± 2.6 flowers/ min and A. florea of 6.3 ± 1.2 flowers/ min

Hybrid ZnO-organic semiconductor interfaces in photodetectors: A comparison of two near-infrared donor-acceptor copolymers

Hybrid organic-inorganic photodiode interfaces have gained significant interest due to their unique physical properties such as mechanical flexibility and high photosensitivity. Two diketopyrrolopyrrole (DPP)-based donor-acceptor copolymers with different backbone conformations are characterized in an inverted non-fullerene photodiode architecture using ZnO nano-patterned films as the electron transport layer. The DPP copolymer with a thienothiophene unit (PBDT-TIDPP) is more planar and rigid compared to the DPP system with a thiophene unit connecting the donor and acceptor moieties within the monomer (PBDT-TDPP). The hybrid interfaces were optimized by using poly(3-hexylthiophene) (P3HT) as the p-type layer for monitoring the critical thickness and morphology of the ZnO layer. The maximum photoresponsivity from a P3HT:ZnO photodiode was found to be 56 mA/W. The photoresponsivity of PBDT-TTDPP:ZnO photodiodes were found to be more than two orders of magnitude higher than PBDT-TDPP:ZnO photodiodes, which is attributed to an enhanced transport of carriers due to the planar backbone conformation of the PBDT-TTDPP copolymer. Capacitance-voltage measurements from hybrid Schottky barrier interfaces further shed light into the nature of photocarriers and device parameters. First-principles time-dependent density-functional theoretical calculations yield a higher absorptivity for the PBDT-TTDPP dimer compared to PBDT-TDPP. (C) 2017 Elsevier B.V. All rights reserved

Morphometric Study of Greater Wax Moth (Galleria mellonella L.) under Laboratory Condition

The present study was carried out in PG Laboratory, Department of Entomology, Faculty of Agricultural Sciences, Siksha ‘O’ Anusandhan Deemed to be University, Bhubaneswar, Odisha on morphometry of greater wax moth (G. mellonella L.). Under laboratory condition, we observed the incubation period of greater wax moth was 8.55±0.42 days. The seven successive larval instars lasted for the following number of days i.e.,4.64±0.36, 5.04±0.51, 6.05±0.62, 7.07±0.41, 8.15±0.  59, 8.41±0.52 and 9.12±0.47 days. Prepupa and pupa lasted, 1.69±0.52 and 8.63±0.38 days,respectively. Adult males lived for 16.79±1.48 days on average, compared to 6.92±0.49 days for females. Females had pre-ovipositional, ovipositional and post-ovipositional durations of 1.13±0.33, 3.78±0.43 and 1.19±0.28 days, respectively. On average females lay 784.01±42.77eggs per female and 167.91±43.64 eggs per female on each day