STUDY OF ROTATIONAL BAND STRUCTURE OF EVEN-EVEN 132;134SM NUCLEI

ARUN GUPTA,SURBHI GUPTA,SIMI GUPTA,SURAM SINGH,ARUN BHARTI 장전수학회 2021 Proceedings of the Jangjeon mathematical society Vol.24 No.4

The study of neutron-decient nuclei in the A130 mass region has been an interesting subject in nuclear structure physics as this region is considered to be transitional region. In the present work, the positive parity rotational band structure of even-even 132,134Sm up to the high spin states has been studied in a microscopic frame work of calculations known as Projected Shell Model (PSM). Yrast spectra for 132,134Sm have been obtained from the PSM calculations and has been found to be in good agreement with the available experimental data. Besides this, the present calculations have also reported the occurrence of back bending at the same spins at which experimental data shows in both the nuclei.

Hot stage microscopy and its applications in pharmaceutical characterization

Kumar Arun,Singh Pritam,Nanda Arun 한국현미경학회 2020 Applied microscopy Vol.50 No.1

Hot stage microscopy (HSM) is a thermal analysis technique that combines the best properties of thermal analysis and microscopy. HSM is rapidly gaining interest in pharmaceuticals as well as in other fields as a regular characterization technique. In pharmaceuticals HSM is used to support differential scanning calorimetry (DSC) and thermo-gravimetric analysis (TGA) observations and to detect small changes in the sample that may be missed by DSC and TGA during a thermal experiment. Study of various physical and chemical properties such sample morphology, crystalline nature, polymorphism, desolvation, miscibility, melting, solid state transitions and incompatibility between various pharmaceutical compounds can be carried out using HSM. HSM is also widely used to screen cocrystals, excipients and polymers for solid dispersions. With the advancements in research methodologies, it is now possible to use HSM in conjunction with other characterization techniques such as Fourier transform infrared spectroscopy (FTIR), DSC, Raman spectroscopy, scanning electron microscopy (SEM) which may have additional benefits over traditional characterization techniques for rapid and comprehensive solid state characterization.

Guava (Psidium guajava L.) Powder as an Antioxidant Dietary Fibre in Sheep Meat Nuggets

Verma, Arun K.,Rajkumar, V.,Banerjee, Rituparna,Biswas, S.,Das, Arun K. Asian Australasian Association of Animal Productio 2013 Animal Bioscience Vol.26 No.6

This study was conducted to explore the antioxidant potential and functional value of guava (Psidium guajava L.) powder in muscle foods. Guava powder was used as a source of antioxidant dietary fibre in sheep meat nuggets at two different levels i.e., 0.5% (Treatment I) and 1.0% (Treatment II) and its effect was evaluated against control. Guava powder is rich in dietary fibre (43.21%), phenolics (44.04 mg GAE/g) and possesses good radical scavenging activity as well as reducing power. Incorporation of guava powder resulted in significant decrease (p<0.05) in pH of emulsion and nuggets, emulsion stability, cooking yield and moisture content of nuggets while ash and moisture content of emulsion were increased. Total phenolics, total dietary fibre (TDF) and ash content significantly increased (p<0.05) in nuggets with added guava powder. Product redness value was significantly improved (p<0.05) due to guava powder. Textural properties did not differ significantly except, springiness and shear force values. Guava powder was found to retard lipid peroxidation of cooked sheep meat nuggets as measured by TBARS number during refrigerated storage. Guava powder did not affect sensory characteristics of the products and can be used as source of antioxidant dietary fibre in meat foods.

The challenge of building a pan-Asia news network

SUBRAMANIAM Arun 한국방송학회 2008 한국방송학회 세미나 및 보고서 Vol.- No.-

Spontaneous Total Resolution of Severe Lumbar Disc Herniation

Arun-Kumar Kaliya-Perumal,Jacob Yoong-Leong Oh 전남대학교 의과학연구소 2020 전남의대학술지 Vol.56 No.1

Integrated approches for identification of promising populations of Valeriana jatamansi in West Himalaya

Arun Kumar Jugran,Indra Dutt Bhatt,Ranbeer Singh Rawal 국립중앙과학관 2016 Journal of Asia-Pacific Biodiversity Vol.9 No.2

Biodiversity conservation and management is a global issue of concern for biologists keeping in view the rapid rate of degradation. The present study focuses on Valeriana jatamansi, a medicinally important herb used in traditional and modern medicines. The raw material of the species is collected from the wild, which puts pressure on its natural habitat; hence, data on diversity attributes including morphological, phytochemical, antioxidant activity, and genetic diversity of V. jatamansi are analyzed to identify promising sources and to develop conservation and management strategies for target species. Neighbor joining cluster and principal component analysis was used to identify elites based on all these attributes. Based on neighbor joining cluster and principal component analysis two populations, Dunagiri and Tharali, were identified as elites and promising sources for raw material collection and conservation purposes. However, individually, each attribute prioritizes different populations. The approach of the present study can be further utilized for developing conservation planning and management of different medicinal plants of the region. This will also promote the interest of researchers in future studies and will aid in collecting plant material from a choice of population.

COMPARATIVE STUDY ON THE FAILURE BEHAVIOR OF ARC PLUG WELD JOINTS OF AUTOMOTIVE STEELS FROM 440MPa TO 1500MPa IN TENSILE SHEAR TEST

ARUN LALACHAN,SIVA PRASAD MURUGAN,KIM KYUNG-YOUNG(김경영),SHIN JI-YOUNG(신지영),DOOYOUNG KIM(김두영),GONG HO-YOUNG(공호영),YEONG DO PARK(박영도) 대한용접·접합학회 2021 대한용접학회 특별강연 및 학술발표대회 개요집 Vol.2021 No.5

Efforts to reduce the vehicle weight and improve the crash performance have led to the increased application of advanced high strength steels (AHSS) into the automotive architecture. Although resistance spot welding and laser welding are mainly used for joining thin sheets in the car body. these joining methods poses a problem of reachability in chassis part. To overcome this issue, arc plug welds are invented as a novel method for joining steel sheets in chassis part. These shift in joining procedure to arc plug welds, consequently propelled the need for the understanding of the plug weldability of various steel sheets. In this study, to investigate the plug weldability, a comparative evaluation of six steel sheets ranging from 440MPa to 1500MPa with similar thickness of 1.0 mm has been done by using ER110S wire in 8:2 Ar-CO2 atmosphere with a circular hole of 6.0 mm diameter. The static tensile shear strength and microstructure of these arc plug welds with similar effective interfacial weld diameter of 6.0 mm are detailed. It was found that the AHSS consistently achieved high tensile shear strength compared to the conventional steel grades. The differences in failure mode are attributed due to the HAZ softening and weld metal hardness.

Investigation of the joint strength and failure mode of automotive steel with arc plug welding from 440MPa to 1500MPa steels

ARUN LALACHAN,SIVA PRASAD MURUGAN,김경영,신지영,김두영,공호영,박영도 대한용접·접합학회 2021 대한용접학회 특별강연 및 학술발표대회 개요집 Vol.2021 No.5

Efforts to reduce the vehicle weight and improve the crash performance have led to the increased application of advanced high strength steels (AHSS) into the automotive architecture. Although resistance spot welding and laser welding are mainly used for joining thin sheets in the car body. However, the joining methods poses a problem of reachability in chassis part. To overcome this issue, arc plug welds are invented as a novel method for joining steel sheets in chassis part. To address this shift in joining procedure to arc plug welds, consequently propelled the need to the understanding of the plug weldability of various steel sheets. In this study, to investigate the plug weldability, a comparative evaluation of six steel sheets ranging from 440MPa to 1500MPa with similar thickness of 1.0 mm has been done by using ER110S wire in 8:2Ar CO2 atmosphere with a hole of 6 mm. The mechanical properties and microstructure of these arc plug welds with similar effective interfacial weld diameter of 6mm are detailed. It was found that the AHSS consistently achieved high tensile shear strength compared to the conventional steel grades. The differences in failure mode are attributed due to the HAZ softening and weld metal hardness.

CFD Analysis of a Micro Shock Tube Flow

Arun Kumar.R,Rajesh.G,H.D. Kim 한국전산유체공학회 2012 한국전산유체공학회 학술대회논문집 Vol.2012 No.5

Past few decades have witnessed the growing importance of micro shock tube in various engineering applications like micro combustion, micro turbines, MEMS, particle delivery devices etc. Owing to its large surface area to volume ratio, micro shock tube exhibits different flow characteristics from the well established macro shock tube flows. One of the major changes involved in such kind of small scale flows is that the Knudsen Number becomes high enough to produce the molecular effects prominent. In these situations the operating pressure becomes a crucial factor in controlling the flow since a low operating pressure will induce rarefaction effects which makes the wall attached fluid slip and have a higher temperature than the wall value. Navier- Stokes equations becomes incompatible to predict such flows and depending on the Knudsen Number, N-S equations with slip wall conditions or molecular dynamics study are needed to be used to mathematically model the flow physics. In the present study, unsteady axi-symmetric CFD method has been applied to simulate the micro shock tube flow. Maxwells slip wall conditions were used to simulate the rarefaction effects produced by the large Knudsen Number. A comparative study on the unsteady behaviors of shock wave and contact discontinuity under different diameters and initial pressure conditions were, in detail, analyzed. The results obtained show much more attenuation of shock wave, compared with macro-shock tubes.

A Distributed Web-Topology for the Wireless Mesh Network with Directional Antennas

( Arun Ranjitkar ),( Young-bae Ko ) 한국인터넷정보학회 2011 KSII Transactions on Internet and Information Syst Vol.5 No.1

Topology management, which includes neighbor discovery, tracking and updating, is a key area that need to be dealt with appropriately to increase network performance. The use of directional antenna in Wireless Mesh Networks is beneficial in constructing backbone networks viewing the properties of directional antenna. The backbone links must be robust to obtain better network performance. In this paper, a simple yet effective topology protocol is presented that performs well compared to its predecessors. Our protocol constructs the topology with the constraints in the number of links per node. The full topology is constructed in two phases. The resultant topology is termed as Web-topology. The topology formed is robust, efficient, and scalable.