Friction Stir Lap Welding of AZ31B and AA6061 Alloys Using Tin as an Inter-Layer

Anil Bandi,Srinivasa R. Bakshi 대한금속·재료학회 2022 METALS AND MATERIALS International Vol.28 No.7

The formation of Mg17Al12and Al3Mg2is inevitable even in solid-state joining of Al and Mg alloys by friction stir welding(FSW). In the present study, the effect of a thin inter-layer of Sn (tin) and FSW parameters (pin length and tool rotationspeed) on the microstructure and strength of friction stir lap welds of 3 mm thick AA6061 Al alloy and AZ31B Mg alloysheets was investigated. A ~ 20 μm thick Sn layer was deposited on AZ31B alloy by displacement plating. The heat generatedduring the welding melted the Sn layer and the rotation action of the tool pushed the molten Sn to the hooks on the advancingside and retreating side. The extent of Mg17Al12and Al3Mg2intermetallic compound formation was reduced with Sninter-layer with limited formation of Mg2Sn. The Sn inter-layer helped improve the lap shear strength at lower tool rotationalspeed (600 RPM) and pin lengths of 3.25 and 3.75 mm compared to joints without Sn inter-layer. Lap welds prepared witha 3.25 mm pin at 600 RPM had a lap shear strength of 245 N/mm which is the highest value reported so far and is 116%higher compared to joints without Sn inter-layer. This was due to elimination of hook at the advancing side and retreatingside and disintegration of intermetallic compounds.

Noble metal-free dual cocatalysts for improved H₂ production from water splitting under solar irradiation

Anil Kumar Reddy Police(Police Anil Kumar Reddy),Sungjun Bae(배성준) 대한환경공학회 2022 대한환경공학회 학술발표논문집 Vol.2022 No.11

ANION INDUCED BLUE TO PURPLE TRANSITION IN BACTERIORHODOPSIN

Singh, Anil K.,Kapil, Mrunalini M. Korean Society of Photoscience 1996 Journal of Photosciences Vol.3 No.2

Anil K. Singh, Mrunalini M. Kapil, Department of Chemistry, Indian Institute of Technology Bombay - 400076, INDIA Purple membrane (PM, $\lambda$$_{max}$ 570 nm) of H. halobium on treatment with sulphuric acid changes its colour to blue ($\lambda$$_{max}$ 608 nm). The purple chromophore can be regenerated from the blue chromophore by exogeneous addition of anions such as CI$^-$ and HPO$_4^{2-}$. Chloride ion is found to be more effective than the dibasic phosphate ion in regenerating the purple chromophore. Nevertheless, one thing common to the anion regeneration is that both CI$^-$ and HPO$_4^{2-}$ show marked pH effect. At pH 1.0 the efficiency of regeneration of the purple chromophore is greater than at pH 2.0, for the same anion concentration. Fluorescence and circular dichroic studies indicate that the proteins do not undergo drastic changes at the secondary' or tertiary structure level and the native structure is preserved during this transition. However, chromophoric-site interactions between retinal and the apoprotein are affected during this colour transition. A molecular mechanism is advanced for this transition.

Technical feasibility study for power generation from a potential mini hydro site nearby Shoolini University

Pundir, Anil,Kumar, Anil Techno-Press 2014 Advances in energy research Vol.2 No.2

Small Hydro-Power (SHP) is an environmental friendly technology. Usually hydro power generation projects are viewed as constructing large dams and reservoirs but available new research and engineering techniques have helped hydro power generation without large dams and without large reservoirs. In India, there are several water installations, irrigation dams, canals, streams or running rivers not tapped to generate power. In these cases the existing system and facilities can help in generating power with less investment and time. This area is yet unexplored. Harnessing a stream for hydroelectric power is a major undertaking for the energy crises and the global issues to go green. In this technical note a potential site for mini hydro power plant nearby Shoolini University is identified and examined for the economic feasibility.

A PVT-compensated 2.2 to 3.0 GHz Digitally Controlled Oscillator for All-Digital PLL

Anil Kavala,배우람,김성우,Gi-Moon Hong,Han-Kyu Chi,김수환,정덕균 대한전자공학회 2014 Journal of semiconductor technology and science Vol.14 No.4

We describe a digitally controlled oscillator (DCO) which compensates the frequency variations for process, voltage, and temperature (PVT) variations with an accuracy of ±2.6% at 2.5 GHz. The DCO includes an 8 phase current-controlled ring oscillator, a digitally controlled current source (DCCS), a process and temperature (PT)-counteracting voltage regulator, and a bias current generator. The DCO operates at a center frequency of 2.5 GHz with a wide tuning range of 2.2 GHz to 3.0 GHz. At 2.8 GHz, the DCO achieves a phase noise of -112 dBc/Hz at 10 MHz offset. When it is implemented in an all-digital phase-locked loop (ADPLL), the ADPLL exhibits an RMS jitter of 8.9 ps and a peak to peak jitter of 77.5 ps. The proposed DCO and ADPLL are fabricated in 65 nm CMOS technology with supply voltages of 2.5 V and 1.0 V, respectively.

Cross Comparison on C Compilers Reliability Impact

Anil Kumar Karna,Hengming Zou 한국정보기술융합학회 2010 JoC Vol.1 No.1

A Fast and Robust Approach for Modeling of Nanoscale Compound Semiconductors for High Speed Digital Applications

Anil Ahlawat,Manoj Pandey,Sujata Pandey 대한전자공학회 2006 Journal of semiconductor technology and science Vol.6 No.3

An artificial neural network model for the microwave characteristics of an InGaAs/InP hemt for 70 ㎚ gate length has been developed. The small-signal microwave parameters have been evaluated to determine the transconductance and drain-conductance. We have further investigated the frequency characteristics of the device. The neural network training have been done using the three layer architecture using Levenberg-Marqaurdt Backpro pagation algorithm. The results have been compared with the experimental data, which shows a close agreement and the validity of our proposed model.

Design and Performance Evaluation of Low Cost Earth to Air Heat Exchanger Model Suitable for Small Buildings in Arid and Semi Arid Regions

Anil Kumar Misra,Mayank Gupta,Manish Lather,Himanshu Garg 대한토목학회 2015 KSCE JOURNAL OF CIVIL ENGINEERING Vol.19 No.4

An experimental study was performed on a prototype model of Earth to Air Heat Exchanger System (EAHE) equipped with low cost material like PVC pipes and exhaust fans made on temporary platform. Emphasis was given on the design of the duct system suitable for small houses without any space in urban and rural areas. Tests were performed to predict the cooling potential and impact of the material on the performance of EAHE system. Experiment was performed continuously for more than three weeks and the result shows that irrespective to the inlet air temperature (ranges from 34oC to 44oC), outlet air temperature was recorded between 20oC to 22oC, which shows the effectiveness of the system. No significant affect of the material used for making the underground air pipe system was recorded on the performance of the model. The Minimum EER (W/W) ratio calculated for the prototype model was around 3.78, which is equivalent to a Energy Star 5 rating, the most efficient system. The weekly energy saving potential of the model before and after integration of EAHE was analyzed i.e., around 5 kWh/week and 20 kWh/week respectively. This considerable increase in weekly energy savings potential of model due to EAHE leads to mitigation of CO2 emissions if implemented in the residential, commercial and industrial buildings and the corresponding annual carbon credit of these buildings can be decreased manifold. The Life Cycle Cost (LCC) analysis of model also shows that the payback period is around 3 to 4 years for the investment on EAHE system. After a series of experimental analysis the study also reveals that EAHE system is easily and economically feasible technique which can drastically reduce the consumption of energy in future and eliminate the need for conventional compressor based cooling systems.

Reliability based partial safety factor of concrete containing nano silica and silica fume

Anil Kumar Nanda,Prem Pal Bansal,Maneek Kumar 사단법인 한국계산역학회 2020 Computers and Concrete, An International Journal Vol.26 No.5

The influence of combination of nano silica and silica fume, as partial cement replacement materials, on the properties of concrete has been studied through the measurement of compressive strength. The compressive strength of concrete in terms of mean, standard deviation and with-in-test coefficient of variation related to the variation in the nominated parameters have also been developed. The compressive strength data developed experimentally has been analyzed using normal-probability distribution and partial safety factors of composite concretes have been evaluated by using first order second moment approach with Hasofer Lind’s method. The use of Nano silica and silica fume in concrete decreases the partial safety factor of concrete i.e., increase the reliability of concrete. The experimental results show that the properties of concrete having nano silica and silica fume in combination were better than that of a plain concrete. The SEM test results showing the level of Ca(OH)2 in plain concrete and consumption level Ca(OH)2 of concrete containing nano silica & silica fume have also been presented.

생강 뿌리썩음증상의 병징학, 기생체간 상호작용 및 약제방제

ANIL DOSHI,SNEH MATHUR 한국응용곤충학회 1987 한국응용곤충학회지 Vol.26 No.4

뿌리썩음증상은 병징에 따라 3가지로 대별되었다. 뿌리썩음증상은 Pythium aphanidermatum을 선접종 후 Fusarium solani를 후접종 하였을 때 가장 심하였다. 뿌리혹선충과 Phthium aphanidermatum과의 상호작용은 없었다. 근경 발아는 각 처리에서 현저히 증가하였고 Alliette 0.25% 처리에서 가장 높았다. 토양관주에 의한 치료 및 예방효과는 Alliette, Burgandy mixture, 다이센 M-45, 디포라탄이 우수하였으며, 수량도 증가하였다. Three diffeerent types of symptoms were observed according to the pathogen associated with the rhizomes. The maximum rotting was observed in case when Pythium aphanidermatum was inoculated first followed by Fusarium solani. There was no interaction in case of root knot nematode Meloidogyne incognita and Pythium aphanidermatum. Average per cent germination of the rhizomes were increased significantly in each treatment and maximum in case of Alliette(.25%). The per cent pre & post drenching rotting was minimum in case of Alliette, Burgandy mixture, Dithane-M 45 and Difolatan. These fungicides also increase the yield of rhizome significantly.