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.

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.

Fabrication of Nanoaggregates of triple hydrophilic block copolymers by Binding of Ionic Surfactants

Anil Khanal,Shin-ichi Yusa,Kenichi Nakashima 한국고분자학회 2006 한국고분자학회 학술대회 연구논문 초록집 Vol.2006 No.10

Burnout in Indian teachers

ANIL SHUKLA 서울대학교 교육연구소 2008 Asia Pacific Education Review Vol.9 No.3

Burnout is a concept which was born in the mid 1970's in the USA and with astonishing rapidity has become a catch-word to convey an almost unlimited variety of social and personal problems afflicting workers. It describes a specific dysfunction among helping professionals, believed to be the result of excessive demands made upon their energy, strength and resources. Although a clearly agreed upon definition does not exist, burnout is characterized by the inability to be sufficiently concerned about and involved with service recipients. A burnt out worker tends to withdraw emotionally from the demands of the job. Burnout is reflected in emotional exhaustion and apathy, physical fatigue, lack of energy, psychosomatic illness, increased alcohol and drug consumption, cynicism, inappropriate anger, depression and lack of personal achievements. Now, it is observed that teachers are also showing symptoms of burnout, which directly or indirectly affect their teaching performance. Motivated by these reasons the investigators decided to investigate the status of burnout among secondary school teachers and assess its extent in Indian teachers.

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.

Quercetin Protects Against Acute Immobilization Stress-Induced Behaviors and Biochemical Alterations in Mice

Anil Kumar,Richa Goyal 한국식품영양과학회 2008 Journal of medicinal food Vol.11 No.3

Oxidative stress is a major contributor to the alterations of various pathological conditions, including neurodegenerative and neuropsychiatric problems. Antioxidative flavonoids, ubiquitously included in vegetables, fruits, and teas, are expected to prevent degenerative diseases. Recently, flavonoids have been characterized as neuroprotectants in the treatment of various neurological disorders. The present study was designed to investigate protective effects of quercetin, a bioflavonoid, against acute immobilization-induced behavioral and biochemical alterations in mice. Mice were immobilized for a period of 6 hours. Quercetin (20 and 40 mg/kg, i.p.) was administered 30 minutes before subjecting the animals to acute stress. Behavioral tests (mirror chamber, actophotometer, and tail flick test) and biochemical analysis (malondialdehyde, reduced glutathione, catalase, nitrite, and protein levels) were subsequently performed. Acute immobilization stress for a period of 6 hours caused severe anxiety, analgesia, and impaired motor activity in mice. Biochemical analyses revealed an increase in malondialdehyde and nitrite levels as well as partial depletion of reduced glutathione and catalase activity in immobilization-stressed brain. Behavioral and biochemical parameters were significantly altered as compared to naive mice. Pretreatment with quercetin (20 and 40 mg/kg, i.p.) significantly reversed immobilized stress-induced anxiety and analgesia and reduced locomotor activity. Biochemically, quercetin treatment attenuated malondialdehyde accumulation and nitrite activity and restored the depleted reduced glutathione and catalase activity. Neuroprotective effects of quercetin were significantly improved as compared to control (immobilized stressed) animals. Results suggest that neuroprotective properties of quercetin can be used in the treatment and management of stress and related disorders.

Effect of Curcumin on Intracerebroventricular Colchicine-Induced Cognitive Impairment and Oxidative Stress in Rats

Anil Kumar,P.S. Naidu,N. Seghal,S.S.V. Padi 한국식품영양과학회 2007 Journal of medicinal food Vol.10 No.3

This study was designed to investigate the protective effects of curcumin against colchicine-induced cognitiveimpairment and oxidative stress in rats. Male Wistar rats (weighing 150200 g) received colchicine intracerebroventricularly(15 .g per rat), and cognitive dysfunctions were evaluated by the Morris water maze and the plus maze performance task andsupported by biochemical tests. Central administration of colchicine caused memory deficit in both the Morris water mazeand the elevated plus maze task paradigm tasks. Chronic treatment with curcumin (550 mg/kg, p.o.) twice daily for a periodof 25 days beginning 4 days prior to colchicine injection significantly improved the colchicine-induced cognitive impairment.Biochemically, chronic administration of curcumin significantly reduced the elevated lipid peroxidation, restored the decreasedreduced glutathione level and acetylcholinesterase activity, and attenuated the raised colchicine-induced elevated nitrite lev-els. The results of the present study indicate that curcumin has a protective role against colchicine-induced cognitive impair-ment and associated oxidative stress.