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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.
Arun Samuel, T.S.,Balamurugan, N.B. The Korean Institute of Electrical Engineers 2014 Journal of Electrical Engineering & Technology Vol.9 No.1
In this paper, a new two dimensional (2D) analytical modeling and simulation for a Dual Material Double Gate tunnel field effect transistor (DMDG TFET) is proposed. The Parabolic approximation technique is used to solve the 2-D Poisson equation with suitable boundary conditions and analytical expressions for surface potential and electric field are derived. This electric field distribution is further used to calculate the tunnelling generation rate and thus we numerically extract the tunnelling current. The results show a significant improvement in on-current characteristics while short channel effects are greatly reduced. Effectiveness of the proposed model has been confirmed by comparing the analytical results with the TCAD simulation results.
Spinal Navigation during Orthopedic Residency Training: A Double-Edged Sword?
Arun-Kumar Kaliya-Perumal,Tamara Soh,Mark Tan,Colum Patrick Nolan,Chun Sing Yu,Jacob Yoong-Leong Oh 대한정형외과학회 2019 Clinics in Orthopedic Surgery Vol.11 No.2
Background: Orthopedic residents in our institute have the opportunity to participate in navigation-assisted spine surgery during their residency training. This paves the way for a new dimension of learning spine surgery, which the previous generation was not exposed to. To study this in detail, we conducted a cross-sectional descriptive survey among our residents to analyse their perception, understanding, and competency regarding pedicle screw application using spinal navigation. Methods: We selected orthopedic residents (n = 20) who had completed 3 years of training that included at least one rotation (4–6 months) in our spine division. They were asked to respond to a four-part questionnaire that included general and Likert scale-based questions. The first two parts dealt with various parameters regarding spinal navigation and free-hand technique for applying pedicle screws. The third part dealt with residents’ opinion regarding the advantages and disadvantages of spinal navigation. The final part was an objective analysis of residents’ ability to identify the pedicle screw entry points in selected segments. Results: We found that our residents were better trained to apply pedicle screws using spinal navigation. The mean Likert scale score for perception regarding their competency to apply pedicle screws using spinal navigation was 3.65 ± 0.81, compared to only 2.8 ± 0.77 when using the free-hand technique. All residents agreed that spinal navigation is an excellent teaching tool with higher accuracy and greater utility in anatomically critical cases. However, 35% of the residents were not able to identify the entry points correctly in the given segments. Conclusions: All selected residents were perceived to be competent to apply pedicle screws using spinal navigation. However, some of them were not able to identify the entry points correctly, probably due to overreliance on spinal navigation. Therefore, we encourage residents to concentrate on surface anatomy and tactile feedback rather than completely relying on the navigation display monitor during every screw placement. In addition, incorporating cadaveric and saw bone workshops as a part of teaching program can enhance better understanding of surgical anatomy.
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.
( Arun Karyampudi ),( Uday C Ghoshal ),( Rajan Singh ),( Abhai Verma ),( Asha Misra ),( Vivek A Saraswat ) 대한소화기기능성질환·운동학회(구 대한소화관운동학회) 2017 Journal of Neurogastroenterology and Motility (JNM Vol.23 No.2
Background/Aims Though nocturnal acid-breakthrough (NAB) is common in gastroesophageal reflux disease (GERD) patients, its clinical importance results from esophageal acidification, which has been shown to be uncommon. Ilaprazole, a long-acting proton pump inhibitor, may cause NAB infrequently. Accordingly, we studied prospectively, (1) frequency and degree of esophageal acidification during NAB, and (2) frequency and severity of NAB while on ilaprazole versus omeprazole. Methods Fifty-eight consecutive patients with GERD on once daily ilaprazole, 10 mg (n = 28) or omeprazole, 20 mg (n = 30) for > one month underwent 24-hour impedance-pH monitoring prospectively. NAB was defined as intra-gastric pH < 4 for > one hour during night, and esophageal acidification as pH < 4 for any duration. Nocturnal symptoms (heartburn, regurgitation, and chest pain) were also recorded. Results Of the 58 patients (age 35.5 [inter-quartile range 26.5-46.0] years, 38 [65.5%], 42 (72.4%) had NAB. Though patients with NAB had lower nocturnal intra-gastric pH than without (2.8 [1.9-4.1] vs 5.7 [4.6-6.8], P < 0.001), frequency and duration of nocturnal esophageal acidification (17/42 vs 4/16, P = 0.360 and 0.0 [0.0-1.0] vs 0.0 [0.0-0.3] minutes, P = 0.260, respectively) and symptoms were comparable (13/42 vs 6/16, P = 0.750). Though ilaprazole was associated with less NABs (1 [range 1-2, n = 19] vs 1 [range 1-3, n = 23], P = 0.010) than omeprazole, the frequency, duration, and mean intra-gastric pH during NAB were comparable (19/28 vs 23/30, P = 0.560; 117 [0-315] vs 159 [69-287] minutes, P = 0.500; 1.02 [0.7-1.4] vs 1.04 [0.44-1.3], P = 0.620, respectively). Conclusions Though NAB was common while patients were on a proton pump inhibitor, esophageal acidification was uncommon. Frequency and severity of NAB were comparable among patients on ilaprazole and omeprazole, except for the lesser number of NABs with ilaprazole. (J Neurogastroenterol Motil 2017;23:208-217)