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NOTE ON SOME CHARACTER FORMULAS
( Mahendra Pal Chaudhary ),( Sangeeta Chaudhary ),( Junesang Choi ) 호남수학회 2016 호남수학학술지 Vol.38 No.4
Chaudhary and Choi [7] presented 14 identities which reveal certain interesting interrelations among character formulas, combinatorial partition identities and continued partition identities. In this sequel, we aim to give slightly modified versions for 8 iden- tities which are chosen among the above-mentioned 14 formulas.
NOTE ON SOME CHARACTER FORMULAS
Chaudhary, Mahendra Pal,Chaudhary, Sangeeta,Choi, Junesang The Honam Mathematical Society 2016 호남수학학술지 Vol.38 No.4
Chaudhary and Choi [7] presented 14 identities which reveal certain interesting interrelations among character formulas, combinatorial partition identities and continued partition identities. In this sequel, we aim to give slightly modified versions for 8 identities which are chosen among the above-mentioned 14 formulas.
Distributed Transmission Line Negative Group Delay Circuit With Improved Signal Attenuation
Chaudhary, Girdhari,Yongchae Jeong IEEE 2014 IEEE microwave and wireless components letters Vol.24 No.1
<P>In this letter, a novel design and implementation of a distributed negative group delay circuit (NGDC) with reduced signal attenuation is demonstrated. By inserting an additional transmission line Z2 into the conventional NGDC, the proposed NGDC provides further design parameters in order to obtain the required differential-phase group delay (GD) time and help to reduce the signal attenuation. As a result, the number of gain compensating amplifiers can be reduced, which can contribute to the efficiency enhancement as well as the stable operation when integrated into the RF system. Both theory and experiment are provided to validate the proposed structure. From the experiment, for the same GD time of -7.9 ns, the signal attenuation of the proposed circuit is 16.5 dB, an improvement signal attenuation of the conventional circuit of 19.2 dB.</P>
A Design of Reconfigurable Negative Group Delay Circuit Without External Resonators
Chaudhary, Girdhari,Yongchae Jeong,Jaejoong Im IEEE 2015 IEEE antennas and wireless propagation letters Vol.14 No.-
<P>In this letter, we present the novel design and implementation of a microstirp line reconfigurable negative group delay circuit (NGDC) using a branch-line. Theoretical analysis shows that reconfigurable characteristics in the proposed circuit can be obtained by properly choosing the characteristic impedances of the branch-line and tuning only the termination resistance. Therefore, the proposed reconfigurable NGDC does not require any extra resonators. For experimental validation, the proposed circuit was designed and fabricated for a wideband code division multiple access downlink frequency operating at a center frequency ( f<SUB>0</SUB>) of 2.14 GHz. Measurement results show the group delays variation of -2 ns to -10 ns with signal attenuation variation of -25 dB to -36.6 dB at f<SUB>0</SUB>. For enhancement of the negative group delay bandwidth, two NGDCs operating at slightly different center frequencies are cascaded and measured.</P>
Tightly regulated and high level expression vector construction for Escherichia coli BL21 (DE3)
Chaudhary, A.K.,Lee, E.Y. Korean Society of Industrial and Engineering Chemi 2015 Journal of industrial and engineering chemistry Vol.31 No.-
A 474-bp ds-DNA linker-A containing all bio-parts was designed to construct tightly inducible expression vector, pNB1, for Escherichia coli. The cymR repressor expressed constitutively under pGapA promoter binds cumate operator, thus repressing the expression of target gene under T7 promoter. The potential of pNB1 was evaluated by comparing the fluorescence of green fluorescence proteins (GFP) in pNB1 and other expression system induced with cumate and isopropyl β-d-1-thiogalactopyranoside (IPTG), respectively. Compared to IPTG, cumate was found to be less toxic to bacterial cells with 2.5-fold increment in GFP expression. In addition, pNB1 was efficient in expressing GFP at low temperature.
Chaudhary, M.P.,Ashine, Ahmed Buseri,Wakene, Feyissa Kaba The Honam Mathematical Society 2017 호남수학학술지 Vol.39 No.3
The objective of this research article is to establish two relationships between q-product identities, theta function identities and combinatorial partition identities, using elementary results.
A Vision-Based Method to Find Fingertips in a Closed Hand
Chaudhary, Ankit,Vatwani, Kapil,Agrawal, Tushar,Raheja, J.L. Korea Information Processing Society 2012 Journal of information processing systems Vol.8 No.3
Hand gesture recognition is an important area of research in the field of Human Computer Interaction (HCI). The geometric attributes of the hand play an important role in hand shape reconstruction and gesture recognition. That said, fingertips are one of the important attributes for the detection of hand gestures and can provide valuable information from hand images. Many methods are available in scientific literature for fingertips detection with an open hand but very poor results are available for fingertips detection when the hand is closed. This paper presents a new method for the detection of fingertips in a closed hand using the corner detection method and an advanced edge detection algorithm. It is important to note that the skin color segmentation methodology did not work for fingertips detection in a closed hand. Thus the proposed method applied Gabor filter techniques for the detection of edges and then applied the corner detection algorithm for the detection of fingertips through the edges. To check the accuracy of the method, this method was tested on a vast number of images taken with a webcam. The method resulted in a higher accuracy rate of detections from the images. The method was further implemented on video for testing its validity on real time image capturing. These closed hand fingertips detection would help in controlling an electro-mechanical robotic hand via hand gesture in a natural way.
Pleiotropic Roles of Metalloproteinases in Hematological Malignancies: an Update
Chaudhary, Ajay K,Chaudhary, Shruti,Ghosh, Kanjaksha,Nadkarni, A Asian Pacific Journal of Cancer Prevention 2016 Asian Pacific journal of cancer prevention Vol.17 No.7
Controlled remodeling of the extracellular matrix (ECM) is essential for cell growth, invasion and metastasis. Matrix metalloproteinases (MMPs) are a family of secreted, zinc-dependent endopeptidases capable of degradation of ECM components. The expression and activity of MMPs in a variety of human cancers have been intensively studied. They play important roles at different steps of malignant tumor formation and have central significance in embryogenesis, tissue remodeling, inflammation, angiogenesis and metastasis. However, increasing evidence demonstrates that MMPs are involved earlier in tumorigenesis. Recent studies also suggest that MMPs play complex roles in tumor progression. MMPs and membrane type (MT)-MMPs are potentially significant therapeutic targets in many cancers, so that designing of specific MMP inhibitors would be helpful for clinical trials. Here, we review the pleiotropic roles of the MMP system in hematological malignancies in-vitro and in-vivo models.