606 research outputs found
Modified virtually scaling free adaptive CORDIC rotator algorithm and architecture
No full textIn this article we proposed a novel CoOrdinate Rotation DIgital Computer (CORDIC) rotator algorithm that converges to the final target angle by adaptively executing appropriate iteration steps while keeping the scale factor virtually constant and completely predictable. The new feature of our scheme is that depending on the input angle the scale factor can assume only two values viz., 1 and 1/?2 and it is independent of the number of executed iteration, nature of iteration and wordlength. In this algorithm, compared to the conventional CORDIC a reduction of 50% iteration is achieved on an average without compromising the accuracy. The adaptive selection of the appropriate iteration step is predicted from the binary representation of the target angle and no further arithmetic computation in the angle approximation datapath is required. The convergence range of the proposed CORDIC rotator is spanned over the entire coordinate space. The new CORDIC rotator requires 22% less adders and 53% less registers compared to that of the conventional CORDIC. The synthesized cell area of the proposed CORDIC rotator core is 0.7 mm2 and its power dissipation is 7 mW in IHP in-house 0.25 ?m BiCMOS technology. To our knowledge, this is the smallest pipelined CORDIC rotator reported so far
Impact of combination of water stress and heavy metals on germination and seedling growth of two Pigeon Pea (Cajanus Cajan L.millspaugh) cultivars
No full textABSTRACT
The ever changing climatic factors increase the chances of occurrence of abiotic stresses. Plants, in nature are frequently exposed to single or combination of abiotic stresses simultaneously that limit crop yields. The aim of the study was to determine the influence of heavy metals(Cd, Cr) and water stress induced by polyethylene glycol(PEG) on germination and early seedling growth of two pigeon pea (Cajanus cajan L.Millspaugh) cultivars. Seeds of two Pigeon pea (Cajanus cajan L.Millspaugh) cv. LRG-41 and Yashoda-45 cultivars were subjected to water stress by using PEG – 6000 ( -0.3 MPa , -0.6 MPa , -0.9 MPa and -1.2 MPa); heavy metal stress by Cadmium and Chromium(20,60,100,200,400ppm). In comparison with the control, the lowest germination rate values were observed at -0.9MPa, 400 ppm Cd and 400 ppm Cr. Shoot and root length was reduced significantly with a rise in PEG and heavy metal levels. Cd concentration had a more depressing effect on the root than on the shoot growth. Interactive effects between heavy metal and water stress on dry weight and root length was significant. According to this study the interactive effect of both stresses was additive.
Key Words: Water stress, heavy metals, germination, interactive effects
REFERENCES
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De Silva N.D.G, Ewa Cholewa and Peter Ryser. 2012. Effects of combined drought and heavy metal stresses on xylem structure and hydraulic conductivity in red maple (Acer rubrum L.) Journal of Experimental Botany. 2-10 .
Giovanni DalCorso, Silvia Farinati and Antonella Furini. 2010. Regulatory networks of cadmium stress in plants. Plant Signaling & Behavior 5:6, 663-667.
Kaydan, D. and Yagmur, M. 2008. Germination, Seedling growth and relative water content of shoot in different seed sizes of triticale under osmotic stress of water and NaCl. Afr.J. Biotechnol. 7: 2862-2868.
Michel, B.E. and Kaufmann, M.R. 1973. The osmotic potential of polyethylene glycol 6000. Plant Physiology 51, 914-916.
Nafiseh Nematshahi, Mehrdad Lahouti and Ali Ganjeali. Accumulation of chromium and its effect on growth of (Allium cepa cv. Hybrid). 2012. European Journal of Experimental Biology, 2 (4):969-974.
Ravi Ranjan Kumar, Krishna Karjol and G. R. Naik Variation of sensitivity to drought stress in pigeon pea (cajanus cajan [l.]Millsp) cultivars during seed germination and early seedling growth. 2011. World Journal of Science and Technology. 1(1): 11-18.
Swapna B and RamaGopal G. Interactive effects between water stress and heavy metals on seed germination and seedling growth of two green gram (Vigna radiata L.wilzec) cultivars. 2014. Biolife. 2(1):291-296.
Swapna, B and Rama Gopal, G (2015). Germination and early growth responses of Vigna mungo L. Hepper cultivars to water stress and heavy metals. The Ame J Sci & Med Res, 1(2):169-174. doi:10.17812/ajsmr123
Traditional and non-traditional treatments for autism spectrum disorder with seizures: an on-line survey
Full text linkAbstract Background Despite the high prevalence of seizure, epilepsy and abnormal electroencephalograms in individuals with autism spectrum disorder (ASD), there is little information regarding the relative effectiveness of treatments for seizures in the ASD population. In order to determine the effectiveness of traditional and non-traditional treatments for improving seizures and influencing other clinical factor relevant to ASD, we developed a comprehensive on-line seizure survey. Methods Announcements (by email and websites) by ASD support groups asked parents of children with ASD to complete the on-line surveys. Survey responders choose one of two surveys to complete: a survey about treatments for individuals with ASD and clinical or subclinical seizures or abnormal electroencephalograms, or a control survey for individuals with ASD without clinical or subclinical seizures or abnormal electroencephalograms. Survey responders rated the perceived effect of traditional antiepileptic drug (AED), non-AED seizure treatments and non-traditional ASD treatments on seizures and other clinical factors (sleep, communication, behavior, attention and mood), and listed up to three treatment side effects. Results Responses were obtained concerning 733 children with seizures and 290 controls. In general, AEDs were perceived to improve seizures but worsened other clinical factors for children with clinical seizure. Valproic acid, lamotrigine, levetiracetam and ethosuximide were perceived to improve seizures the most and worsen other clinical factors the least out of all AEDs in children with clinical seizures. Traditional non-AED seizure and non-traditional treatments, as a group, were perceived to improve other clinical factors and seizures but the perceived improvement in seizures was significantly less than that reported for AEDs. Certain traditional non-AED treatments, particularly the ketogenic diet, were perceived to improve both seizures and other clinical factors. For ASD individuals with reported subclinical seizures, other clinical factors were reported to be worsened by AEDs and improved by non-AED traditional seizure and non-traditional treatments. The rate of side effects was reportedly higher for AEDs compared to traditional non-AED treatments. Conclusion Although this survey-based method only provides information regarding parental perceptions of effectiveness, this information may be helpful for selecting seizure treatments in individuals with ASD.</p
A VLSI Array Architecture for Realization of DFT, DHT, DCT and DST
No full textA unified array architecture is described for computation of DFT, DHT, DCT and DST using a modified CORDIC (CoOrdinate Rotation DIgital Computer) arithmetic unit as the basic Processing Element (PE). All these four transforms can be computed by simple rearrangement of input samples. Compared to five other existing architectures, this one has the advantage in speed in terms of latency and throughput. Moreover, the simple local neighborhood interprocessor connections make it convenient for VLSI implementation. The architecture can be extended to compute transformation of longer length by judicially cascading the modules of shorter transformation length which will be suitable for Wafer Scale Integration (WSI). CORDIC is designed using Transmission Gate Logic (TGL) on sea of gates semicustom environment. Simulation results show that this architecture may be a suitable candidate for low power/low voltage applications
EXPRESSION PROFILINGOF AUXIN RESPONSIVEGENES DURING INFLORESCENCE DEVELOPMENT IN BLACK PEPPER (PIPER NIGRUML.) USING REAL TIME PCR (RT-QPCR)
No full textSowndarya K1*, Swapna Alex 2, Soni K B3, Kiran A G
A Review on Ultrasound-based Thyroid Cancer Tissue Characterization and Automated Classification.
No full textIn this paper, we review the different studies that developed Computer Aided Diagnostic (CAD) for automated classification of thyroid cancer into benign and malignant types. Specifically, we discuss the different types of features that are used to study and analyze the differences between benign and malignant thyroid nodules. These features can be broadly categorized into (a) the sonographic features from the ultrasound images, and (b) the non-clinical features extracted from the ultrasound images using statistical and data mining techniques. We also present a brief description of the commonly used classifiers in ultrasound based CAD systems. We then review the studies that used features based on the ultrasound images for thyroid nodule classification and highlight the limitations of such studies. We also discuss and review the techniques used in studies that used the non-clinical features for thyroid nodule classification and report the classification accuracies obtained in these studies
A novel technique for estimating intrinsic camera parameters in geometric camera calibration
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