Corrigendum to “A new species of Emilia Cass. (Asteraceae) from the Eastern Ghats of India with notes on ecosystem evaluation and conservation status” [Journal of Asia-Pacific Biodiversity 10(2017): 104–111]

Koppineedi Veera Satish,Jonnakuti Prakasa Rao 국립중앙과학관 2017 Journal of Asia-Pacific Biodiversity Vol.10 No.4

On the page 104 ‘Materials and methods’ the following sentence is incorrect: “Field and voucher numbers were assigned and realtime observations on habitat and taxonomic notes were recorded for specimens and deposited in Andhra University Herbarium (AUH), Andhra Pradesh, India.” The correct version is: “Field and voucher numbers were assigned and realtime observations on habitat and taxonomic notes were recorded for specimens, holotype deposited in Andhra University Herbarium (AUH) and isotypes in the centers of Botanical Survey of India viz. Central National Herbarium (CAL), Deccan Regional Centre (DRC), Madras Herbarium (MH) and Arid Zone Circle (BSJO). On page 107 ‘Results and discussion’of the article, the following sentence was incorrect: “Type. India. Andhra Pradesh, Visakhapatnam, Araku Valley, Galikonda hilltop, 500 m away from Galikonda viewpoint, 1245m alt, 18ˈ16 ˈ28.1ˈˈ N, 82ˈ59ˈ20.5ˈˈ E, 07 Dec 2013, K.V. Satish, J. Prakasa Rao 21202 (CAL, Holotype.; AUH, DRC, MH, BSJO, Isotypes). The correct version is: Type. Holotype: India. Andhra Pradesh, Visakhapatnam, Araku Valley, Galikonda hilltop, 500 m away from Galikonda viewpoint, 1245 m alt, 18ˈ16ˈ28.1ˈˈ N, 8259ˈ20.5ˈˈ E, 07 Dec 2013, K.V. Satish, J. Prakasa Rao 21202 (AUH). Isotypes: 21202 a (CAL); 21202 b (DRC); 21202 c (MH); 21202 d (BSJO). On the page 104 ‘Materials and methods’ the following sentence is incorrect: “Field and voucher numbers were assigned and realtime observations on habitat and taxonomic notes were recorded for specimens and deposited in Andhra University Herbarium (AUH), Andhra Pradesh, India.” The correct version is: “Field and voucher numbers were assigned and realtime observations on habitat and taxonomic notes were recorded for specimens, holotype deposited in Andhra University Herbarium (AUH) and isotypes in the centers of Botanical Survey of India viz. Central National Herbarium (CAL), Deccan Regional Centre (DRC), Madras Herbarium (MH) and Arid Zone Circle (BSJO). On page 107 ‘Results and discussion’of the article, the following sentence was incorrect: “Type. India. Andhra Pradesh, Visakhapatnam, Araku Valley, Galikonda hilltop, 500 m away from Galikonda viewpoint, 1245m alt, 18ˈ16 ˈ28.1ˈˈ N, 82ˈ59ˈ20.5ˈˈ E, 07 Dec 2013, K.V. Satish, J. Prakasa Rao 21202 (CAL, Holotype.; AUH, DRC, MH, BSJO, Isotypes). The correct version is: Type. Holotype: India. Andhra Pradesh, Visakhapatnam, Araku Valley, Galikonda hilltop, 500 m away from Galikonda viewpoint, 1245 m alt, 18ˈ16ˈ28.1ˈˈ N, 82ˈ59ˈ20.5ˈˈ E, 07 Dec 2013, K.V. Satish, J. Prakasa Rao 21202 (AUH). Isotypes: 21202 a (CAL); 21202 b (DRC); 21202 c (MH); 21202 d (BSJO).

Antibiofilm and Anti-β-Lactamase Activities of Burdock Root Extract and Chlorogenic Acid against Klebsiella pneumoniae

( Satish Kumar Rajasekharan ),( Samiraj Ramesh ),( Ann Susan Satish ),( Jintae Lee ) 한국미생물 · 생명공학회 2017 Journal of microbiology and biotechnology Vol.27 No.3

Small phytochemicals have been successfully adopted as antibacterial chemotherapies and are being increasingly viewed as potential antibiofilm agents. Some of these molecules are known to repress biofilm and toxin production by certain bacterial and yeast pathogens, but information is lacking with regard to the genes allied with biofilm formation. The present study was performed to investigate the inhibitory effect of burdock root extract (BRE) and of chlorogenic acid (CGA; a component of BRE) on clinical isolates of Klebsiella pneumoniae. BRE and CGA exhibited significant antibiofilm activity against K. pneumoniae without inflicting any harm to its planktonic counterparts. In vitro assays supported the β-lactamase inhibitory effect of CGA and BRE while in silico docking showed that CGA bound strongly with the active sites of sulfhydryl-variable-1 β-lactamase. Furthermore, the mRNA transcript levels of two biofilmassociated genes (type 3 fimbriae mrkD and trehalose-6-phosphate hydrolase treC) were significantly downregulated in CGA- and BRE-treated samples. In addition, CGA inhibited biofilm formation by Escherichia coli and Candida albicans without affecting their planktonic cell growth. These findings show that BRE and its component CGA have potential use in antibiofilm strategies against persistent K. pneumoniae infections.

Strain sensing skin-like film using zinc oxide nanostructures grown on PDMS and reduced graphene oxide

Satish, Tejus,Balakrishnan, Kaushik,Gullapalli, Hemtej,Nagarajaiah, Satish,Vajtai, Robert,Ajayan, Pulickel M. Techno-Press 2017 Structural monitoring and maintenance Vol.4 No.2

In this paper, we present a strain-sensitive composite skin-like film made up of piezoresistive zinc oxide (ZnO) nanorods embedded in a flexible poly(dimethylsiloxane) substrate, with added reduced graphene oxide (rGO) to facilitate connections between the nanorod clusters and increase strain sensitivity. Preparation of the composite is described in detail. Cyclic strain sensing tests are conducted. Experiments indicate that the resulting ZnO-PDMS/rGO composite film is strain-sensitive and thus capable of sensing cycling strain accurately. As such, it has the potential to be molded on to a structure (civil, mechanical, aerospace, or biological) in order to provide a strain sensing skin.

Adaptive-length pendulum smart tuned mass damper using shape-memory-alloy wire for tuning period in real time

Satish Nagarajaiah,Dharma Theja Reddy Pasala 국제구조공학회 2014 Smart Structures and Systems, An International Jou Vol.13 No.2

Due to the shift in paradigm from passive control to adaptive control, smart tuned mass dampers (STMDs) have received considerable attention for vibration control in tall buildings and bridges. STMDs are superior to tuned mass dampers (TMDs) in reducing the response of the primary structure. Unlike TMDs, STMDs are capable of accommodating the changes in primary structure properties, due to damage or deterioration, by tuning in real time based on a local feedback. In this paper, a novel adaptive-length pendulum (ALP) damper is developed and experimentally verified. Length of the pendulum is adjusted in real time using a shape memory alloy (SMA) wire actuator. This can be achieved in two ways i) by changing the amount of current in the SMA wire actuator or ii) by changing the effective length of current carrying SMA wire. Using an instantaneous frequency tracking algorithm, the dominant frequency of the structure can be tracked from a local feedback signal, then the length of pendulum is adjusted to match the dominant frequency. Effectiveness of the proposed ALP-STMD mechanism, combined with the STFT frequency tracking control algorithm, is verified experimentally on a prototype two-storey shear frame. It has been observed through experimental studies that the ALP-STMD absorbs most of the input energy associated in the vicinity of tuned frequency of the pendulum damper. The reduction of storey displacements up to 80 % when subjected to forced excitation (harmonic and chirp-signal) and a faster decay rate during free vibration is observed in the experiments.

Directional antenna based Hybrid-CCC-CR-AODV routing protocol for Cognitive Radio Ad-Hoc Networks

Satish Anamalamudi,Minglu Jin,Jae Moung Kim 한국정보통신학회 2015 2016 INTERNATIONAL CONFERENCE Vol.7 No.1

End-to-end application throughput, network power consumption and routing control overhead at network layer of Cognitive Radio Ad-Hoc Networks (CRAHNs) is mainly based on common control channel. Hence, reliable and robust CCC design for CR-AODV routing protocol is utmost important to provide shortest end-to-end channel-path and reduced node, network power consumption. State-of-the-art CR-AODV routing protocols propose In-band or Out-of-band CCC design for routing and cognitive control message exchange. But, multichannel hidden terminals, longer end-to-end channel-path and increased channel rendezvous time results in additional routing and cognitive control overhead with longer end-to-end delays and increased node power consumption. To evade this, we propose Directional antenna based Hybrid-CCC-CR-AODV routing protocol with adaptive power control algorithm for CRAHNs. Experimental results reveal that proposed Directional antenna based Hybrid-CCC-CR-AODV routing protocol has decreased routing and cognitive control overhead with increased end-to-end application throughput when compared with Omnidirectional antenna based In-band/Out-of-band CCC-CR-AODV routing protocols.

Wear behaviors of single-layer and multi-layer coated carbide inserts in high speed machining of hardened AISI 4340 steel

Satish Chinchanikar,S. K. Choudhury 대한기계학회 2013 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.27 No.5

Flank wear progression and wear mechanisms of uncoated, coated with PVD applied single-layer TiAlN, and CVD applied multi-layer MT-TiCN/Al2O3/TiN cemented carbide inserts were analyzed during dry turning of hardened AISI 4340 steel (35 HRC). Experimental observations indicate that by applying a coating to the uncoated insert the limiting cutting speed increase from 62 to 200 m/min, which further extends up-to 300-350 m/min when using multi-layer coating scheme. Relatively lower wear rate seen when using single-layer TiAlN coated inserts. However, after removal of the thin layer of coating the wear rate increase rapidly, subsequently dominates the wear rate of multi-layer coated inserts. Cutting forces; especially axial and radial components have also shown the similar behavior and increase rapidly when the tool failure occurs. Flank wear, crater wear and catastrophic failure are the dominant forms of tool wear. Digital microscope and SEM images coupled with elemental analysis (EDAX) have been taken at various stages of tool life for understanding the wear mechanisms.

Adaptive length SMA pendulum smart tuned mass damper performance in the presence of real time primary system stiffness change

Satish Nagarajaiah,Michael T. Contreras,Dharma Theja Reddy Pasala 국제구조공학회 2014 Smart Structures and Systems, An International Jou Vol.13 No.2

In a companion paper, Pasala and Nagarajaiah analytically and experimentally validate the Adaptive Length Pendulum Smart Tuned Mass Damper (ALP-STMD) on a primary structure (2 story steel structure) whose frequencies are time invariant (Pasala and Nagarajaiah 2012). In this paper, the ALP-STMD effectiveness on a primary structure whose frequencies are time varying is studied experimentally. This study experimentally validates the ability of an ALP-STMD to adequately control a structural system in the presence of real time changes in primary stiffness that are detected by a real time observer based system identification. The experiments implement the newly developed Adaptive Length Pendulum Smart Tuned Mass Damper (ALP-STMD) which was first introduced and developed by Nagarajaiah (2009), Nagarajaiah and Pasala (2010) and Nagarajaiah et al. (2010). The ALP-STMD employs a mass pendulum of variable length which can be tuned in real time to the parameters of the system using sensor feedback. The tuning action is made possible by applying a current to a shape memory alloy wire changing the effective length that supports the damper mass assembly in real time. Once a stiffness change in the structural system is detected by an open loop observer, the ALP-STMD is re-tuned to the modified system parameters which successfully reduce the response of the primary system. Significant performance improvement is illustrated for the stiffness modified system, which undergoes the re-tuning adaptation, when compared to the stiffness modified system without adaptive re-tuning.

In Silico Docking to Explicate Interface between Plant-Originated Inhibitors and E6 Oncogenic Protein of Highly Threatening Human Papillomavirus 18

Satish Kumar,Lingaraja Jena,Maheswata Sahoo,Mrunmayi Kakde,Sangeeta Daf,Ashok K. Varma 한국유전체학회 2015 Genomics & informatics Vol.13 No.2

The leading cause of cancer mortality globally amongst the women is due to human papillomavirus (HPV) infection. There is need to explore anti-cancerous drugs against this life-threatening infection. Traditionally, different natural compounds such as withaferin A, artemisinin, ursolic acid, ferulic acid, (–)-epigallocatechin-3-gallate, berberin, resveratrol, jaceosidin, curcumin, gingerol, indol-3-carbinol, and silymarin have been used as hopeful source of cancer treatment. These natural inhibitors have been shown to block HPV infection by different researchers. In the present study, we explored these natural compounds against E6 oncoprotein of high risk HPV18, which is known to inactivate tumor suppressor p53 protein. E6, a high throughput protein model of HPV18, was predicted to anticipate the interaction mechanism of E6 oncoprotein with these natural inhibitors using structure-based drug designing approach. Docking analysis showed the interaction of these natural inhibitors with p53 binding site of E6 protein residues 108–117 (CQKPLNPAEK) and help reinstatement of normal p53 functioning. Further, docking analysis besides helping in silico validations of natural compounds also helped elucidating the molecular mechanism of inhibition of HPV oncoproteins.

Smart tuned mass dampers: recent developments

Satish Nagarajaiah,정형조 국제구조공학회 2014 Smart Structures and Systems, An International Jou Vol.13 No.2

This special issue focuses on Smart Tuned Mass Dampers (STMD) that are either active or smart or semi-active in nature. Active tuned mass dampers or active mass dampers have found wide acceptance and have been implemented in many tall buildings and long span bridges. Recently researchers have developed a new class of smart tuned mass dampers using either variable stiffness and/or variable damping to effect the change in instantaneous frequency and damping. Since tuning plays a central role in STMDs it is of great current interest thus the topic of this special issue. Discussions of recent active and smart TMD implementations in tall buildings and bridges are also included.

COLOR IMAGE PROCESSING ON A DIGITAL IMAGE

Satish Kumar Singh 한국디지털융합학회 2021 IJICTDC Vol.6 No.2

Color image processing is very useful because color is a strong marker that also simplifies the recognition and extraction of objects from a scene and humans can distinguish thousands of shades of color and intensity compared to just around two dozen shades of grey. The processing of color images can be classified into two main areas as full-color and pseudo-colour. The images are first acquired with a full color sensor such as color TV camera, color scanner and second category has the question of assigning a color to a different monochrome intensity and intensity ranges. The aim of a color model is to promote color specification in a widely agreed way to some standard. A color model is a coordinate system specification and a subspace within that system where a single point represents each color. Some particular conversions can convert different color models to one another. This paper specify overview of different types of images, color models, their conversion and applications.