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Sugumaran KrishnaKumar,Iyyakkannu Sivanesan,Kandasamy Murugesan,정병룡,황승재 한국원예학회 2014 Horticulture, Environment, and Biotechnology Vol.55 No.3
Agrobacterium-mediated gene transfer method for production of transgenic eggplants (Solanum melongenaL. var. PKM1) has been optimized. Polymerase chain reaction of transgenic plants confirmed the presence of the expectedHAL1 fragment. Different tests were carried out to evaluate the level of salt tolerance for the transgenic and controlplants with culture media in vitro (0, 50, 100, 150, or 200 mM NaCl) and with soil in greenhouse (0, 25, 50, 75, or100 mM NaCl). Differences in callus growth between transgenic and control lines were observed. At 150 mM NaCl,the weight of calli from the transgenic population did not differ significantly from that in non salt condition, whilethe growth of wild-type control calli was strongly inhibited. A preliminary evaluation in vivo under controlled greenhouseconditions showed that at moderate salt concentrations (25 mM NaCl), a similar response to salinity in the originalline and in the transgenic progeny was found. However, at higher salt concentration (50 mM NaCl), total dry weight(relative growth) was not significantly decreased by salinity in the transgenic population, while a growth reductionwas observed in the wild-type control. Our results indicated that a higher level of salt tolerance was found in thetransgenic lines than in the wild-type control. Thus, in this present study we have demonstrated the possibility of increasingsalt tolerance in eggplant by introducing the foreign gene, HAL1 derived from yeast.
Sugumaran, C. Pugazhendhi The Korean Institute of Electrical Engineers 2014 Journal of Electrical Engineering & Technology Vol.9 No.3
The polymer nano composite possess good priority recently for engineering applications. Especially the electrical insulating materials attract the high performance of nano composites. In this work the ballmill synthesiation process of nano sized Alumina ($Al_2O_3$), the preparation of new nano composite material with an content of enamel and synthesized Alumina as 1wt%, 3wt% and 5wt%. Experimental investigation has been carried out for the prepared nano composites materials with respect to dielectric parameter measurements such as dielectric loss (tan ${\delta}$), dielectric constant (${\varepsilon}$), dielectric strength under various temperature. The partial discharge level also measured for all the samples and the PD inception voltage is also observed and compared. Weight loss of the material has been analyzed through TGA. It has been experimentally proved that 3wt% of Alumina nano filler added enamel has significant improvement in the dielectric and thermal properties.
Facile and novel synthetic method to prepare nano molybdenum and its catalytic activity
Jaikumar, Sugumaran Sam,Yuvakkumar, Rathinam,Suriya Prabha, Rangaraj,Karunakaran, Gopalu,Rajendran, Venkatachalam,Sun Ig Hong IET 2015 IET nanobiotechnology Vol.9 No.4
<P>This study reports on a facile and economical synthetic method to prepare nano molybdenum by solid-state reaction technique. Metallic nano molybdenum was synthesised from molybdenum trioxide, molybdenum IV oxide and molybdenum VI oxide through thermal decomposition technique. Metallic nano molybdenum prepared from molybdenum IV oxide was used to study the catalytic effect of molybdenum nanoparticles on the growth of <I>Anabaena</I> sp. The increase in concentration of nano molybdenum from 0.1 to 100% in BG11 (N<SUP>-</SUP>Mo<SUP>-</SUP> + nano Mo) medium increases heterocyst frequency. The chlorophyll and protein content in <I>Anabaena</I> sp. was found to improve when compared with bulk molybdenum particles and showed a positive influence to be used as a nano nutrient for <I>Anabaena</I> sp.</P>
C. Pugazhendhi Sugumaran 대한전기학회 2014 Journal of Electrical Engineering & Technology Vol.9 No.3
The polymer nano composite possess good priority recently for engineering applications. Especially the electrical insulating materials attract the high performance of nano composites. In this work the ballmill synthesiation process of nano sized Alumina (Al2O3), the preparation of new nano composite material with an content of enamel and synthesized Alumina as 1wt%, 3wt% and 5wt%. Experimental investigation has been carried out for the prepared nano composites materials with respect to dielectric parameter measurements such as dielectric loss (tan δ), dielectric constant (ε), dielectric strength under various temperature. The partial discharge level also measured for all the samples and the PD inception voltage is also observed and compared. Weight loss of the material has been analyzed through TGA. It has been experimentally proved that 3wt% of Alumina nano filler added enamel has significant improvement in the dielectric and thermal properties.
강정화,Sugumaran KrishnaKumar,Sarah Louise Sua Atulba,정병룡,황승재 한국원예학회 2013 Horticulture, Environment, and Biotechnology Vol.54 No.6
Effect of light provided by various light intensities combined with different photoperiods on the growth and morphogenesis of lettuce (Lactuca sativa L.) ‘Hongyeom Jeockchukmyeon’ in a closed-type plant factory system were evaluated in this study. Four light intensity treatments, i.e., 200, 230, 260, and 290 µmol·m-2·s-1 PPFD, provided from light-emitting diodes (LEDs), with a combination of three different photoperiods 18/6 (1 cycle), 9/3 (2 cycles)or 6/2 (3 cycles) (light/dark) were used. The combination of 290-9/3 (light intensity-photoperiod) showed the highest plant height and fresh shoot weight, while plants grown at 290-18/6 exhibited the greatest root fresh weight, leaf dry weight, and longest root length. The greatest leaf width, maximum number of leaves, and greatest root dry weight were observed in the treatment combination of 290-6/2. Anthocyanin content was found to be highest in the 290-6/2and lowest in the 200-6/2 treatment, whereas chlorophyll fluorescence was observed to be highest in the 260-6/2 and the lowest in the 290-9/3 treatment. Our data showed that providing a high light intensity of 290 µmol·m-2·s-1 PPFD with a shorter photoperiod of 6/2 (light/dark) resulted in good plant growth and development of lettuce, whereas growth at light intensities of 230 or 260 µmol·m-2·s-1 PPFD with longer photoperiods of 18/6 and 9/3 (light/dark)resulted in good growth as well as higher photosynthetic capacity.
A Fusion of Feature Extraction and Feature Selection Technique for Network Intrusion Detection
Yasir Hamid,M.Sugumaran,Ludovic Journaux 보안공학연구지원센터 2016 International Journal of Security and Its Applicat Vol.10 No.8
With varied and widespread attacks on information systems, intrusion detection systems (IDS) have become an indispensable part of security policy for protecting data. IDS monitor event logs and network traffic to uncover suspicious connections that deviate from the regular profile and identify them as threats or attacks. Like most of the cases the dataset used for intrusion detection i.e., KDD99 suffers two problems: imbalanced class distribution and curse of dimensionality. In this work SMOTE has been used for balancing the dataset and once balanced, Principal Component Analysis (PCA) has been used to extract the features. And after that on the transformed dataset Correlation based Feature Selection (CFS) is used to select a subset of important features. The reduced dimension dataset is tested with Support Vector Machines (SVM). Obtained results demonstrate improved detection accuracy, computational efficiency with minimal false alarms and less system resources utilization