14 research outputs found
Use of load generated by SMA for its position control with neutral network estimator
No full textThis paper presents the position control of a shape memory alloy (SMA) wire actuator by measuring the load generated
by the SMA and using a neural network as an estimator for displacement. The experimentation facility is designed and
developed for the position control of the SMA. Gain scheduled proportional integral (GSPI) and pulse width modulated GSPI controllers are designed and implemented. The closed-loop performance of the position control system using the displacement estimated from the load measurement is the same as the performance obtained with the direct position feedback. The position control of the SMA actuator using the SMA load with the neural network estimator is an easily implementable method that does not affect the frequency of operation of the SMA actuator
Figure 2 from: Mahima K, Umapathy S, Sudhakar JV, Sathishkumar R (2021) Systematic reinstatement of highly sacred Ficus krishnae based on differences in morphology and DNA barcoding from Ficus benghalensis (Moraceae). PhytoKeys 186: 121-138. https://doi.org/10.3897/phytokeys.186.74086
No full textFigure 2 Maximum Clade Credibility (MCC) tree from Bayesian analysis using two DNA barcode markers (ITS2+trnH-psbA) with posterior probabilities values in percentage that are shown at nodes
Supplementary material 8 from: Mahima K, Umapathy S, Sudhakar JV, Sathishkumar R (2021) Systematic reinstatement of highly sacred Ficus krishnae based on differences in morphology and DNA barcoding from Ficus benghalensis (Moraceae). PhytoKeys 186: 121-138. https://doi.org/10.3897/phytokeys.186.74086
No full textFigure S3. Parsimony distribution of the morphological characters and their status on the MCC Bayesian tre
Species delimitation of Melia dubia Cav. from Melia azedarach L. complex based on DNA barcoding
No full textThe genus Melia L., which belongs to the â Mahoganyâ family Meliaceae, is a source of important phytochemicals with marked medicinal properties. Species identification in Melia is complex due to the existence of overlapping morphological features. Though Melia dubia Cav. is listed as a synonym of Melia azedarach L., it is not clear from the available literature whether they are the same species or different, and the species complexity still remains unresolved. In the present study, ten accessions of M. dubia and M. azedarach were analysed by DNA barcoding using three chloroplast DNA markers (rbcL, matK, and trnH-psbA), and one nuclear marker (ITS2). Intra-specific divergence was not found in any of the four markers. However, the inter-specific divergence between M. azedarach and M. dubia ranged between 0.3% (rbcL) and 4.7% (ITS2) for individual markers, and for the combined dataset, it was 8.5%. Among the four markers, ITS2 was found to be the most suitable marker for differentiating M. azedarach and M. dubia. Parsimony analysis of the DNA barcoding data showed a clear segregation between M. azedarach and M. dubia as distinct monophyletic clades in all the markers, except the rbcL marker. Our results based on Bayesian analysis of the concatenated dataset strongly support the view that M. dubia be considered a distinct species; not a synonym of M. azedarachThe accepted manuscript in pdf format is listed with the files at the bottom of this page. The presentation of the authors' names and (or) special characters in the title of the manuscript may differ slightly between what is listed on this page and what is listed in the pdf file of the accepted manuscript; that in the pdf file of the accepted manuscript is what was submitted by the author
Long-term morphological model of Poole Harbour
No full textThe study focuses on the impact of human interventions on the natural behaviour of estuaries in response to sea-level rise. In particular it focuses on the affect of managed realignment on the critical sea level rise (SLRcrit) for the Poole Harbour. Numerical model ASMITA (Aggregated Scale Morphological Interaction between a Tidal inlet and the Adjacent coast, Stive and Wang, 1996) is used to study the response of the system to the external forcing (both natural and anthropogenic). ASMITA model schematises the tidal-inlet system and characterises each model element by a single variable volume. Volumetric data of the Poole harbour inlet elements obtained through the digitisation of the historical admiralty charts was used to calibrate the model. The model assumes that the each inlet elements tends towards an equilibrium volume which can be defined using the empirical equations. These equilibrium equations consist of equilibrium parameters that depend on the regional properties like hydrodynamics and topography of the Poole harbour. Once the model is calibrated, simulations were performed with various sea level rise scenarios (historic and future SLR) to observe the natural behaviour of the Poole harbour. Managed realignment is being introduced in the model and a range of values of critical sea-level rise was obtained and compared with the predicted sea-level rise rate given in the literature for the next century. Results suggest that the “hold the line” management scenario (current situation) would not result in the complete loss of inter-tidal flats and the coastal flooding is unlikely to occur over the next century, as a result of critical sea-level rise values exceeds the predicted rate. However research suggests, introducing realignment (coastline retreat management scenario) reduces SLRcrit values for the estuary; thus making the estuary more sensitive to the predicted future SLR rates.CoMEMHydraulic EngineeringCivil Engineering and Geoscience
Systematic reinstatement of highly sacred Ficus krishnae based on differences in morphology and DNA barcoding from Ficus benghalensis (Moraceae)
No full textFicus krishnae is considered as native to India and is well-known for the peculiarity in nature of its cup-shaped leaves where both the vernacular name (Krishna Fig) and specific epithet were derived. The taxonomic status of Ficus krishnae is still unclear and currently treated as a subspecies or variety under Ficus benghalensis. In the present study, morphological characters and molecular analysis were employed to address their species delimitation. The spacer markers ITS2 and trnH-psbA were used for constructing phylogenetic trees along with morphometric analysis. Ficus krishnae distinctly differs from Ficus benghalensis by having cup-forming leaves and the nature of the aerial roots, stipules, petioles, ostiolar bracts of the receptacle, DNA content, chromosome differences and nodal anatomy. The results showed that the highest divergence is observed in trnH-psbA (20.8 ± 12.2), followed by ITS2 (5.7 ± 3.2). The phylogenetic tree construction using Bayesian analysis showed a divergent boundary between the two species suggesting that F. krishnae could be an independent species, not a variety of F. benghalensis. The present study's findings support the view that these two floras can be treated as different species
5G Wireless Mesh Network 802.11s Load Balancing Architecture for 802.11 Bgn Radio-PCI Interface
No full textAbstractThe real time verification and validation process for WLAN is becoming essential for the users whose data falls on wide characteristics requirements such as video centric and high bandwidth. Nature of channel being broadcast and presence of MAC in AP makes proper infrastructure and sharing among hosts. This makes research paper about MAC case study and research development with proper verification and validation. This enhances in DLL gives wireless data link and sustains its link with corresponding MAC address 100%, which never bottlenecks OSI layer realization. Among the entire required parameters, only selected parametric dependent layered characteristics such as codes for enhancing data rate, selection of different radio in MIMO and channel, modes of WLAN are verified and validated by constructing clouddatabase in the slottime margin of 24hours in real-time scenario. The type of data for specific application towards effective use of network capacity under various situations in real-life scenarios are considered upon optimizing the selection of wifi device from lab testing results. This paper further develops a MAC architecture for 30% of internet traffic is video centric and its evaluation under PHY 54Mbps and 512 Mbps with 4 times better throughput than previous one
An adaptive user interface for open educational content
No full textThesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2011.This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.Cataloged from student submitted PDF version of thesis.Includes bibliographical references (p. 67).For my Masters of Engineering thesis project, I have developed a framework of meta- data around open educational resources that are used by students to master a given concept. Based on the assumption that a course can be broken down into specfic concepts and that there are several resources available to students both on sites such as OpenCourseWare and also peer-managed resources like Wikipedia, I develop a model for "relevance" of a resource to the learning of a given concept, where relevance is defined by assignment to a concept by a teacher as well as usage data from students viewing the resources. I combine both active feedback (clicking a "like" button) and passive feedback (view duration and count across all users) to score each resource for a given concept. This score is then used to create an adaptive user interface that indicates which resources may be the most relevant for students learning a given concept based on their peers' feedback. In addition to designing this framework, I provide an implementation of the adaptive user interface on Apple's iPad device, and I provide an evaluation of the educational benefits of this adaptive interface by designing and executing a controlled user study on students in MIT's introductory physics course.by Vijay Umapathy.M.Eng
Species delimitation in congenerics of Genus Daemonorops from India using DNA barcodes
No full textDaemonorops is one of the largest genus of palms, widely distributed in tropical evergreen forests of South and Southeast Asia and especially abundant in peninsular Malaysia. It shares the phylogenetic clade with genus Calamus, but distinctly characterized by the presence of the prophyllar bracts in subtribe Calaminae of family Arecaceae (Palmae). However, the species of Daemonorops are highly variable and homoplasious in their morphological characters. Indian Daemonorops has six species, of which five distributed in Andaman group of islands and one in Indo-China. The study mainly focused on the species of Indo-Myanmar (Andaman Islands) because they have showed uncertainty in their stand as distinct species. Hence it was attempted to test the species delimitation in congenerics using phylogenetic and character analysis of the nuclear genes. The study indicates three species of both Griffith and Beccari (D. jenkinsiana, D. manii, and D. kurziana) in India, and another three species of Renuka et al. (D. wrightmyoensis, D. aurea, and D. rarispinosa) from Andaman group of islands could be the variabilities of D. manii that is colonized throughout the archipelago
Thyroid-Stimulating Hormone Favors Runx2-Mediated Matrix Mineralization in HOS and SaOS2 Cells: An In Vitro and In Silico Approach
No full textOsteoporosis is a skeletal disease that is both systemic and silent characterized by an unbalanced activity of bone remodeling leading to bone loss. Rising evidences demonstrate that thyroid stimulating hormone (TSH) has an important role in the regulation on the metabolism of bone. However, TSH regulation on human osteoblast essential transcriptional factors has not been identified. Current study examined the role of TSH on human osteoblastic Runx2 expression and their functional genes by in vitro and in slico analysis. Human osteoblast like (HOS and SaoS-2) cells were cultured with DMEM and treated with hTSH at the concentration of 0.01 ng/mL and 10 ng/mL. After treatment, osteoblastic Runx2 and IGF-1R beta expression were studied using RT-PCR and western blot analysis. TSH treatment induced osteoblastic essential transcriptional factor, Runx2 in HOS and SaOS2 cells on 48 h duration and elevated the expression of IGF-IR β gene and Protein in SaoS-2 cells. TSH also promotes Runx2 responsive genes such as ALP, Collagen and osteocalcin in SaOS2 cells on day 2 to day 14 of 10 ng/mL of treatment and favors’ matrix mineralization matrix in these cells. In addition, TSH facilitated human osteoblastic cells to mineralize their matrix confirmed by day 21 of alizarin red calcium staining. In silico study was performed to check CREB and ELK1 interaction with Runx2. Results of in silico analysis showed that TSH mediated signalling molecules such as CREB and ELK1 showed interaction with Runx2 which involve in osteobalstic gene expression and differentiation. Present findings confirm that TSH promotes Runx2 expression, osteoblastic responsive genes and bone matrix formation
