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Rajakumar Palanisamy,Senthil Kumar Muthusamy 대한전기학회 2021 Journal of Electrical Engineering & Technology Vol.16 No.1
The installation of distributed generation (DG) units with optimal capacities at optimal locations is becoming an essential issue in a distribution power network to reduce total power loss and to enhance voltage profi le. In this paper, a recently included optimization technique called ant lion optimizer (ALO) has been presented for assessing the optimal size of multiple DG units in a balanced radial distribution system. An integrated methodology of loss sensitivity factor and voltage sensitivity factor is utilized for fi nding the optimal bus locations for the multiple DG unit installation. The optimal size of DG units at the identifi ed bus locations are computed using ALO algorithm by minimizing the total real power loss of distribution network. The minimization of total real power loss will lead to considerable enhancement in voltage profi le. The performance of the proposed algorithm has been evaluated against IEEE 33, 69 and 119 bus balanced radial distribution systems. Furthermore, to outline the superiority of proposed ALO algorithm, the attained results are related with the results of hybrid optimization techniques such as GA-PSO, ABC-CSO and ABC-BAT in terms of total real power reduction and voltage profi le improvement.
Ridgelet transform on square integrable Boehmians
Rajakumar Roopkumar 대한수학회 2009 대한수학회보 Vol.46 No.5
The ridgelet transform is extended to the space of square integrable Boehmians. It is proved that the extended ridgelet transform R is consistent with the classical ridgelet transform R, linear, one-to-one, onto and both R, R^(-1) are continuous with respect to δ-convergence as well as Δ-convergence.
Rajakumar, Govindasamy,Thiruvengadam, Muthu,Mydhili, Govindarasu,Gomathi, Thandapani,Chung, Ill-Min Springer-Verlag 2018 BIOPROCESS AND BIOSYSTEMS ENGINEERING Vol.41 No.1
<P>Bio-mediated synthesis of zinc oxide nanoparticles (ZnO NPs) was carried out by utilizing the reducing and capping potential of Andrographis paniculata leaf extract. The capped ZnO NPs were characterized using UV-Vis, XRD, FTIR, SEM, TEM and SAED analyses. FTIR analysis suggested the role of phenolic compounds, terpenoids, and proteins of A. paniculata leaf extract, in nucleation and stability of ZnO NPs. XRD pattern compared with the standard confirmed spectrum of zinc oxide particles formed in the present experiments were in the form of nanocrystals, as evidenced by the peaks at 2 theta values. SEM and TEM analysis of ZnO NPs reveals those spherical and hexagonal shapes and the sizes at the range of 96-115 and 57 +/- 0.3 nm, respectively. The synthesized nanoparticles possess strong biological activities regarding anti-oxidant, anti-diabetic, and anti-inflammatory potentials which could be utilized in various biological applications by the cosmetic, food and biomedical industries.</P>
MRI Image Retrieval Using Wavelet with Mahalanobis Distance Measurement
Rajakumar, K.,Muttan, S. The Korean Institute of Electrical Engineers 2013 Journal of Electrical Engineering & Technology Vol.8 No.5
In content based image retrieval (CBIR) system, the images are represented based upon its feature such as color, texture, shape, and spatial relationship etc. In this paper, we propose a MRI Image Retrieval using wavelet transform with mahalanobis distance measurement. Wavelet transformation can also be easily extended to 2-D (image) or 3-D (volume) data by successively applying 1-D transformation on different dimensions. The proposed algorithm has tested using wavelet transform and performance analysis have done with HH and $H^*$ elimination methods. The retrieval image is the relevance between a query image and any database image, the relevance similarity is ranked according to the closest similar measures computed by the mahalanobis distance measurement. An adaptive similarity synthesis approach based on a linear combination of individual feature level similarities are analyzed and presented in this paper. The feature weights are calculated by considering both the precision and recall rate of the top retrieved relevant images as predicted by our enhanced technique. Hence, to produce effective results the weights are dynamically updated for robust searching process. The experimental results show that the proposed algorithm is easily identifies target object and reduces the influence of background in the image and thus improves the performance of MRI image retrieval.
RIDGELET TRANSFORM ON SQUARE INTEGRABLE BOEHMIANS
Roopkumar, Rajakumar Korean Mathematical Society 2009 대한수학회보 Vol.46 No.5
The ridgelet transform is extended to the space of square integrable Boehmians. It is proved that the extended ridgelet transform $\mathfrak{R}$ is consistent with the classical ridgelet transform R, linear, one-to-one, onto and both $\mathfrak{R}$, $\mathfrak{R}^{-1}$.1 are continuous with respect to $\delta$-convergence as well as $\Delta$-convergence.
CONTINUITY OF FUZZY PROPER FUNCTIONS ON SOSTAK'S I-FUZZY TOPOLOGICAL SPACES
Roopkumar, Rajakumar,Kalaivani, Chandran Korean Mathematical Society 2011 대한수학회논문집 Vol.26 No.2
The relations among various types of continuity of fuzzy proper function on a fuzzy set and at fuzzy point belonging to the fuzzy set in the context of $\v{S}$ostak's I-fuzzy topological spaces are discussed. The projection maps are defined as fuzzy proper functions and their properties are proved.
MRI Image Retrieval Using Wavelet with Mahalanobis Distance Measurement
K. Rajakumar,S. Muttan 대한전기학회 2013 Journal of Electrical Engineering & Technology Vol.8 No.5
In content based image retrieval (CBIR) system, the images are represented based upon its feature such as color, texture, shape, and spatial relationship etc. In this paper, we propose a MRI Image Retrieval using wavelet transform with mahalanobis distance measurement. Wavelet transformation can also be easily extended to 2-D (image) or 3-D (volume) data by successively applying 1-D transformation on different dimensions. The proposed algorithm has tested using wavelet transform and performance analysis have done with HH and H* elimination methods. The retrieval image is the relevance between a query image and any database image, the relevance similarity is ranked according to the closest similar measures computed by the mahalanobis distance measurement. An adaptive similarity synthesis approach based on a linear combination of individual feature level similarities are analyzed and presented in this paper. The feature weights are calculated by considering both the precision and recall rate of the top retrieved relevant images as predicted by our enhanced technique. Hence, to produce effective results the weights are dynamically updated for robust searching process. The experimental results show that the proposed algorithm is easily identifies target object and reduces the influence of background in the image and thus improves the performance of MRI image retrieval.
Assessing Cold Plasma’s Impact on Banana Growth and Fusarium Wilt Control
Priya Rajakumar,Nadiya Akmal Baharum,Afiqah Insyirah Lutfi,Najiah Mohd Sadali,Muhamad Shakirin Mispan,Lim Lian Kuang,Yap Seong Ling,Norzulaani Khalid,Nur Ardiyana Rejab 한국식물병리학회 2024 Plant Pathology Journal Vol.40 No.5
Bananas (Musa spp.), which serve millions of people worldwide, face a serious threat from Fusarium wilt (FW) disease caused by Fusarium oxysporum f. sp. cubense (Foc). Developing disease-resistant varieties particularly through breeding is challenging due to banana’s seedless nature (parthenocarpic). As an alternative, cold plasma (CP) technology, has the potential to be used for crop improvement. Our study demonstrates a favourable impact of CP on the growth performance of banana (Berangan cultivar, AAA) in terms of height, leaf number and stem diameter. CP-treated plants also displayed delayed disease progression as well as lower disease severity indicated by slightly lower value of leaf symptoms index and rhizome discoloration index compared to the control plants. Additionally, quantitative real-time polymerase chain reaction analysis revealed differential expression of several defence (PR1, WRKY22, PAL, and CEBiP) and growth (Cytochrome P450, NAC68, and CAT) related genes in CP-treated plants, particularly in conjunction with Foc infection. These findings shed light on the potential use of CP in managing FW in banana and offer insights into possible mechanism behind improved traits.