1,477 research outputs found
FPGA based Novel High Speed DAQ System Design with Error Correction
Present state of the art applications in the area of high energy physics
experiments (HEP), radar communication, satellite communication and bio medical
instrumentation require fault resilient data acquisition (DAQ) system with the
data rate in the order of Gbps. In order to keep the high speed DAQ system
functional in such radiation environment where direct intervention of human is
not possible, a robust and error free communication system is necessary. In
this work we present an efficient DAQ design and its implementation on field
programmable gate array (FPGA). The proposed DAQ system supports high speed
data communication (~4.8 Gbps) and achieves multi-bit error correction
capabilities. BCH code (named after Raj Bose and D. K. RayChaudhuri) has been
used for multi-bit error correction. The design has been implemented on Xilinx
Kintex-7 board and is tested for board to board communication as well as for
board to PC using PCIe (Peripheral Component Interconnect express) interface.
To the best of our knowledge, the proposed FPGA based high speed DAQ system
utilizing optical link and multi-bit error resiliency can be considered first
of its kind. Performance estimation of the implemented DAQ system is done based
on resource utilization, critical path delay, efficiency and bit error rate
(BER).Comment: ISVLSI 2015. arXiv admin note: substantial text overlap with
arXiv:1505.04569, arXiv:1503.0881
VESICULAR DRUG DELIVERY SYSTEMS: A NOVEL APPROACH FOR DRUG TARGETING
The objective of the study is to evaluate the potential of novel vesicular drug delivery systems for drug targeting. Novel vesicular drug delivery systems aim to deliver the drug at a rate directed by need of body during the period of treatment, and channel the active entity to the site of action. Vesicular drug delivery systems have been used to improve the therapeutic index, solubility, stability and rapid degradation of drug molecule. Thus a number of novel vesicular drug delivery systems have been developed that allow drug targeting and sustained or controlled release of drug. The focus of this review is to discuss various lipoidal and non-lipoidal vesicles with special emphasis on targeting of drugs
Valence fluctuation in CeReSi and Ising-type magnetic ordering in PrReSi single crystals
Single crystals of and have been
grown by Czochralski method in a tetra-arc furnace. Powder x-ray diffraction
confirmed that these compounds crystallize in the -type
tetragonal crystal structure with space group (No. 128). The
anisotropic physical properties have been studied comprehensively by measuring
the magnetic susceptibility, isothermal magnetization, electrical transport and
specific heat. The low value of magnetic susceptibility together with no
magnetic transition down to ~K gives evidence that the Ce-ions are in the
intermediate valence state in . On the other hand revealed a magnetic ordering at ~K. The sharp drop in the
magnetic susceptibility and a spin flip like metamagnetic transition, for
in the magnetization plot of suggest
an Ising-type antiferromagnetic ordering. Based on magnetic susceptibility and
isothermal magnetization data, a detailed crystal electric field (CEF) analysis
shows that degenerate Hund's rule derived ground state of ion splits into nine singlets with an overall splitting of ~K.
The magnetic ordering in is due to the exchange-generated
admixture of the lowest lying CEF energy levels. Heat capacity data reveal a
sharp peak at ~K, that confirms the bulk nature of the magnetic ordering in
.Comment: 9 pages, 8 figure
Mannich Bases: An Important Pharmacophore in Present Scenario
Mannich bases are the end products of Mannich reaction and are known as beta-amino ketone carrying compounds. Mannich reaction is a carbon-carbon bond forming nucleophilic addition reaction and is a key step in synthesis of a wide variety of natural products, pharmaceuticals, and so forth. Mannich reaction is important for the construction of nitrogen containing compounds. There is a number of aminoalkyl chain bearing Mannich bases like fluoxetine, atropine, ethacrynic acid, trihexyphenidyl, and so forth with high curative value. The literature studies enlighten the fact that Mannich bases are very reactive and recognized to possess potent diverse activities like anti-inflammatory, anticancer, antifilarial, antibacterial, antifungal, anticonvulsant, anthelmintic, antitubercular, analgesic, anti-HIV, antimalarial, antipsychotic, antiviral activities and so forth. The biological activity of Mannich bases is mainly attributed to , -unsaturated ketone which can be generated by deamination of hydrogen atom of the amine group
High transport spin polarization in the van der Waals ferromagnet FeGeTe
The challenging task of scaling-down the size of the power saving electronic
devices can be accomplished by exploiting the spin degree of freedom of the
conduction electrons in van der Waals (vdW) spintronic architectures built with
2D materials. One of the key components of such a device is a near-room
temperature 2D ferromagnet with good metallicity that can generate a highly
spin-polarized electronic transport current. However, most of the known 2D
ferromagnets have either a very low temperature ordering, poor conductivity, or
low spin polarization. In this context, the FeGeTe (with )
family of ferromagnets stand out due to their near-room temperature
ferromagnetism and good metallicity. We have performed spin-resolved Andreev
reflection spectroscopy on FeGeTe ( 273 K) and
demonstrated that the ferromagnet is capable of generating a very high
transport spin polarization, exceeding 50. This makes FeGeTe a
strong candidate for application in all-vdW power-saving spintronic devices.Comment: Accepted for publication in Physical Review
Innovation Strategies in Indian Textile Sector – Evidence from Surat Textile Cluster
Though India has comparative advantage in labour intensive sector like textile, India’s performance in this sector is not too impressive on the export front. In this context, this paper argues that lack of innovation culture could be one of the principal reasons for India’s poor performance. This hypothesis is tested by conducing primary survey in one of the more dynamic textile cluster in Northern India namely, Surat and adjoining areas. Our findings do indicate lack of product as well as organisational innovation culture in this region, which may be a serious bottleneck in competitive export market. We do find that firms score well in respect of marketing innovation which probably suggests that competitive pressure has increased due to the globalization of the economy. Firms are also found to be keen in respect of process innovation to reduce cost in the aftermath of increased pace of competition in the sector
Randomized study of continuous high-dose lenalidomide, sequential azacitidine and lenalidomide, or azacitidine in persons 65 years and over with newly-diagnosed acute myeloid leukemia
Constraining large scale HI bias using redshifted 21-cm signal from the post-reionization epoch
In the absence of complex astrophysical processes that characterize the
reionization era, the 21-cm emission from neutral hydrogen (HI) in the
post-reionization epoch is believed to be an excellent tracer of the underlying
dark matter distribution. Assuming a background cosmology, it is modelled
through (i) a bias function b(k,z), which relates HI to the dark matter
distribution and (ii) a mean neutral fraction (x_{HI}) which sets its
amplitude. In this paper, we investigate the nature of large scale HI bias. The
post-reionization HI is modelled using gravity only N-Body simulations and a
suitable prescription for assigning gas to the dark matter halos. Using the
simulated bias as the fiducial model for HI distribution at z\leq 4, we have
generated a hypothetical data set for the 21-cm angular power spectrum (C_{l})
using a noise model based on parameters of an extended version of the GMRT. The
binned C_{l} is assumed to be measured with SNR \gtrsim 4 in the range 400 \leq
l \leq 8000 at a fiducial redshift z=2.5. We explore the possibility of
constraining b(k) using the Principal Component Analysis (PCA) on this
simulated data. Our analysis shows that in the range 0.2 < k < 2 Mpc^{-1}, the
simulated data set cannot distinguish between models exhibiting different k
dependences, provided 1 \lesssim b(k) \lesssim 2 which sets the 2-sigma limits.
This justifies the use of linear bias model on large scales. The largely
uncertain x_{HI} is treated as a free parameter resulting in degradation of the
bias reconstruction. The given simulated data is found to constrain the
fiducial x_{HI} with an accuracy of \sim 4% (2-sigma error). The method
outlined here, could be successfully implemented on future observational data
sets to constrain b(k,z) and x_{HI} and thereby enhance our understanding of
the low redshift Universe.Comment: 10 pages, 11 figures, 2 tables. Accepted in MNRAS. Revised to match
the accepted versio
Evaluation of urea loaded nanoclay biopolymer composites with Zn and P solubilizing microbes for nitrogen uptake and use efficiency in maize (Zea mays)-wheat (Triticum aestivum) cropping system
A field experiment was conducted during rainy (kharif) 2022 (July 2022–October 2022) and winter (rabi) 2022–23 (November 2022–March 2023) seasons at ICAR-Indian Agricultural Research Institute, New Delhi to evaluate a series of Zn and P solubilizing microbial culture enriched nanoclay biopolymer composite (NCBPC) loaded with nitrogenous fertilizer (urea) and the efficiency of the products for maize (Zea mays L.) and wheat (Triticum aestivum L.). Experiment consisted of 10 treatments, viz. T1, Control; T2, 100% N though urea; T3; T5; T7; and T9, 75% N as urea loaded NCBPC-A (prepared using acrylic acid + acrylamide + mango kernel flour) alone or along with P or Zn or P + Zn solubilizers; T4; T6; T8 and T10, 75% N as urea loaded NCBPC-B (prepared using acrylic acid + acrylamide + maize flour) alone or along with P or Zn or P + Zn solubilizers in a randomized block design (RBD) and replicated thrice. In both maize and wheat crop, highest grain (5.09 and 5.32 t/ha) and straw yield (6.56 and 7.45 t/ha), apparent N recovery (51.26 and 47.26%) and agronomic efficiency (12 and 13.3 kg grain yield obtained/kg N application) were obtained in treatment T10 followed by T9. In addition, total N uptake significantly enhanced by 20.1–28.4% in maize and 22.1–30.8% in wheat (T9 and T10); apparent nitrogen recovery (ANR) improved by 12.9–18.2 and 15.2–21.1% and agronomic efficiency (AE) triggered by 19.5–21.2 and 15.4–20.8% in maize and wheat crops respectively, under T9 and T10 treatments over standard urea fertilization (T2). Thus, the study concludes that, 25% N requirement could be cut down through application of 75% N (urea) loaded NCBPCs in conjunction with Zn or P or Zn + P solubilizing microbial culture as compared to sole urea application under maize-wheat cropping system
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