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Singh, Devinder,Sharma, Sushma,Mahajan, Arun,Singh, Suram,Singh, Rajinder Korean Chemical Society 2013 Bulletin of the Korean Chemical Society Vol.34 No.6
Intergrowth perovskite type complex oxides $La_{0.8}Ln_{0.2}Sr_2MnCrO_{7-{\delta}}$ (Ln=La, Nd, Gd, and Dy) have been synthesized by sol-gel method. Rietveld profile analysis shows that the phases crystallize with tetragonal unit cell in the space group I4/mmm. The unit cell parameters a and c decrease with decreasing effective ionic radius of the lanthanide ion. The magnetic studies suggest that the ferromagnetic interactions are dominant due to $Mn^{3+}$-O-$Mn^{4+}$ and $Mn^{3+}$-O-$Cr^{3+}$ double exchange interactions. Both Weiss constant (${\theta}$) and Curie temperature ($T_C$) increase with decreasing ionic radius of lanthanide ion. It was found that the transport mechanism is dominated by Mott's variable range hopping (VRH) model with an increase of Mott localization energy.
Symbiotic Organisms Search Response to Distributed Database Queries
Atinderpal Singh,Krishan Kumar,Rajinder Singh Virk,김혜진 사단법인 인문사회과학기술융합학회 2016 예술인문사회융합멀티미디어논문지 Vol.6 No.11
This paper has prime focus on the query optimization problem in distributed database environment. Query Processing is the major concept involved in distributed system. Data that is dispersed geographically at different locations is too gathered at resulting user site. There are many different execution actions that lead to same query result but differ in the cost incurred in query processing. We have to consider the execution strategy that yields optimal result. Communication cost is the major cost incurred when we talk about query processing in distributed system. Symbiotic Organisms Search Algorithm (Meta-heuristic) has been applied for query optimization in distributed environment. Result obtained using this meta-heuristic approach is compared with several optimization approaches. Results reveal the better performance of the algorithm for solving the hard problem of query processing in distributed database environment.
Simranjit Singh,Sonak Saini,Gurpreet Kaur,Rajinder Singh Kaler 한국광학회 2014 Current Optics and Photonics Vol.18 No.2
For multi parameter optimization of Raman Fiber Amplifier (RFA), a simple genetic algorithm is presented in the scenario of a 320 channel Dense Wavelength Division Multiplexed (DWDM) system at channel spacing of 25 GHz. The large average gain (> 22 dB) is observed from optimized RFA with the optimized parameters, such as 39.6 km of Raman length with counter-propagating pumps tuned to 205.5 THz and 211.9 THz at pump powers of 234.3 mW, 677.1 mW respectively. The gain flattening filter (GFF) has also been optimized to further reduce the gain ripple across the frequency range from 190 to 197.975 THz for broadband amplification.
Optimizing the Net Gain of a Raman-EDFA Hybrid Optical Amplifier using a Genetic Algorithm
Simranjit Singh,Rajinder-Singh Kaler 한국광학회 2014 Current Optics and Photonics Vol.18 No.5
For the first time, a novel analytical model of the net gain for a Raman-EDFA hybrid optical amplifier (HOA) is proposed and its various parameters optimized using a genetic algorithm. Our method has been shown to be robust in the simultaneous analysis of multiple parameters (Raman length, EDFA length, and pump powers) to obtain large gain. The optimized HOA is further investigated at the system level for the scenario of a 50-channel DWDM system with 0.2-nm channel spacing. With an optimized HOA, a flat gain of >17 dB is obtained over the effective ITU-T wavelength grid with a variation of less than 1.5 dB, without using any gain-flattening technique. The obtained noise figure is also the lowest value ever reported for a Raman-EDFA HOA at reduced channel spacing.
Devinder Singh,Sushma Sharma,Arun Mahajan,Suram Singh,Rajinder Singh 대한화학회 2013 Bulletin of the Korean Chemical Society Vol.34 No.6
Intergrowth perovskite type complex oxides La0.8Ln0.2Sr2MnCrO7-δ (Ln=La, Nd, Gd, and Dy) have been synthesized by sol-gel method. Rietveld profile analysis shows that the phases crystallize with tetragonal unit cell in the space group I4/mmm. The unit cell parameters a and c decrease with decreasing effective ionic radius of the lanthanide ion. The magnetic studies suggest that the ferromagnetic interactions are dominant due to Mn3+–O–Mn4+ and Mn3+–O–Cr3+ double exchange interactions. Both Weiss constant (θ) and Curie temperature (TC) increase with decreasing ionic radius of lanthanide ion. It was found that the transport mechanism is dominated by Mott’s variable range hopping (VRH) model with an increase of Mott localization energy.
Realization of High Speed All-Optical Half Adder and Half Subtractor Using SOA Based Logic Gates
Simranjit Singh,Rajinder Singh Kaler,Rupinder Kaur 한국광학회 2014 Current Optics and Photonics Vol.18 No.6
In this paper, the scheme of a single module for simultaneous operation of all-optical computing circuits, namely half adder and half subtractor, are realized using semiconductor optical amplifier (SOA) based logic gates. Optical XOR gate by employing a SOA based Mach-Zehnder interferometer (MZI) configuration is used to get the sum and difference outputs. A carry signal is generated using a SOA-four wave mixing (FWM) based AND gate, whereas, the borrow is generated by employing the SOA-cross gain modulation (XGM) effect. The obtained results confirm the feasibility of our configuration by proving the good level of quality factor i.e. ~5.5, 9.95 and 12.51 for sum/difference, carry and borrow, respectively at 0 dBm of input power.
Polyaniline/carbon nanotubes platform for sexually transmitted disease detection
Singh, Renu,Dhand, Chetna,Sumana, Gajjala,Verma, Rachna,Sood, Seema,Gupta, Rajinder Kumar,Malhotra, Bansi Dhar John Wiley Sons, Ltd. 2010 Journal of molecular recognition Vol.23 No.5
<P><B>Abstract</B></P>10.1002/jmr.1014.abs<P>Polyaniline/carbon nanotubes composite (PANI‐CNT) electrochemically deposited onto indium‐tin‐oxide (ITO) coated glass plate has been utilized for <I>Neisseria gonorrhoeae</I> detection by immobilizing 5′‐amino‐labeled <I>Neisseria gonorrhoeae</I> probe (aDNA) using glutaraldehyde as a cross‐linker. PANI‐CNT/ITO and aDNA‐Glu‐PANI‐CNT/ITO electrodes have been characterized using scanning electron microscopy (SEM), Fourier Transform Infrared (FT‐IR) spectroscopy, cyclic voltammetry (CV), and differential pulse voltammetry (DPV). This bioelectrode can be used to detect <I>N. gonorrhoeae</I> using methylene blue (MB) as redox indicator with response time of 60 s and stability of about 75 days when stored under refrigerated conditions. DPV studies reveal that this bioelectrode can detect complementary DNA concentration from 1 × 10<SUP>−6</SUP> M to 1 × 10<SUP>−17</SUP> M with detection limit of 1.2 × 10<SUP>−17</SUP> M. Further, this bioelectrode (aDNA‐Glu‐PANI‐CNT/ITO) exhibits specificity toward <I>N. gonorrhoeae</I> species and shows negative response with non‐<I>Neisseria gonorrhoeae</I> <I>Neisseria</I> species (NgNS) and other gram negative bacteria (GNB). Copyright © 2010 John Wiley & Sons, Ltd.</P>
Adenocarcinoma in Horseshoe Kidney
Rajinder Jhobta,Amarpreet Singh Bawa,Ashok Kumar Attri,Robin Kaushik 연세대학교의과대학 2003 Yonsei medical journal Vol.44 No.4
An adenocarcinoma arising in a horseshoe kidney (HK) is rare. The case of a forty five-year-old male patient, presenting with a recurrent, painless hematuria, is reported. On investigation the patient was found to have a horseshoe kidney, with an adenocarcinoma in the left hemi-kidney, which was treated surgically, with a hemi-nephrectomy, of the involved part, being performed to excise the tumor. A brief review of the relevant literature is also presented.
Recent advances in CRISPR/Cas mediated genome editing for crop improvement
Samriti Sharma,Rajinder Kaur,Anupama Singh 한국식물생명공학회 2017 Plant biotechnology reports Vol.11 No.4
Plant breeding is one of the oldest sustainable agriculture methods used to increase the yield, quality and other biomaterial for human use. Many crops like fruits, vegetables, ornamental flowers, shrubs and trees, have been long cultivated to satisfy human food and aesthetical needs. Conventional breeding technologies like selection, hybridization, mutation through physical and chemical methods, and modern transgenic approaches are often used to improve the desired traits without inducing the pleiotropic effects. But these breeding methods are highly laborious and complicated to enhance crop production. Recently, targeted genome editing through engineered nuclease including zinc finger nuclease, transcription activator like effector nuclease and clustered regularly interspaced short palindromic repeats (CRISPRs) have been used to improve various traits in plants. Genome editing has emerged as a novel alternative approach to classical breeding with higher mutagenic efficiency. Here, we briefly cover the strengths of CRISPRs in comparison with other genome editing techniques. We also discuss its potential applications in genetic improvement of various crops and future prospective.