239 research outputs found
A MEASUREMENTS INSERTION WITH LARGE DATA
The essential challenge for several big data programs is always to search data volumes and take functional understanding for other hobbies. Focused by real-world programs controlling of massive Data were revealed to get demanding yet very compelling job. We make as browse the efficient theorem that differentiates popular features of big data rising, and signifies big human sources representation, in the idea of data mining. Recommended theorem recommends that important popular features of big data are large by heterogeneous and varied data sources self-directed with distributed furthermore to decentralized control, and complicated, developing in data associations featuring believe that big data necessitate a big intelligence to improve data for finest values. We submit big human sources depiction, in the idea of data mining which data-driven structure involves demand determined choice of information sources, mining furthermore to analysis, modelling of user interest, and contemplation on security
FPGA-Based Portable Ultrasound Scanning System with Automatic Kidney Detection
Bedsides diagnosis using portable ultrasound scanning (PUS) offering comfortable diagnosis with various clinical advantages, in general, ultrasound scanners suffer from a poor signal-to-noise ratio, and physicians who operate the device at point-of-care may not be adequately trained to perform high level diagnosis. Such scenarios can be eradicated by incorporating ambient intelligence in PUS. In this paper, we propose an architecture for a PUS system, whose abilities include automated kidney detection in real time. Automated kidney detection is performed by training the Viola–Jones algorithm with a good set of kidney data consisting of diversified shapes and sizes. It is observed that the kidney detection algorithm delivers very good performance in terms of detection accuracy. The proposed PUS with kidney detection algorithm is implemented on a single Xilinx Kintex-7 FPGA, integrated with a Raspberry Pi ARM processor running at 900 MHz
Size Segregation and Convection of Granular Mixtures Almost Completely Packed in the Rotating Thin Box
Size segregation of granular mixtures which are almost completely packed in a
rotating drum is discussed with an effective simulation and a brief analysis.
Instead of a 3D drum, we simulate 2D rotating thin box which is almost
completely packed with granular mixtures. The phase inversion of radially
segregated pattern which was found in a 3D experiment are qualitatively
reproduced with this simulation, and a brief analysis is followed. Moreover in
our simulation, a global convection appears after radial segregation pattern is
formed, and this convection induces axially segregated pattern.Comment: 9 pages, 5 figures, PACS number(s): 45.70.-n, 45.70.M
Pyrabactin, an ABA agonist, induced stomatal closure and changes in signalling components of guard cells in abaxial epidermis of Pisum sativum
Pyrabactin, a synthetic agonist of abscisic acid (ABA), inhibits seed germination and hypocotyl growth and stimulates gene expression in a very similar way to ABA, implying the possible modulation of stomatal function by pyrabactin as well. The effect of pyrabactin on stomatal closure and secondary messengers was therefore studied in guard cells of Pisum sativum abaxial epidermis. Pyrabactin caused marked stomatal closure in a pattern similar to ABA. In addition, pyrabactin elevated the levels of reactive oxygen species (ROS), nitric oxide (NO), and cytoplasmic pH levels in guard cells, as indicated by the respective fluorophores. However, apyrabactin, an inactive analogue of ABA, did not affect either stomatal closure or the signalling components of guard cells. The effects of pyrabactin-induced changes were reversed by pharmalogical compounds that modulate ROS, NO or cytoplasmic pH levels, quite similar to ABA effects. Fusicoccin, a fungal toxin, could reverse the stomatal closure caused by pyrabactin, as well as that caused by ABA. Experiments on stomatal closure by varying concentrations of ABA, in the presence of fixed concentration of pyrabactin, and vice versa, revealed that the actions of ABA and pyrabactin were additive. Further kinetic analysis of data revealed that the apparent KD of ABA was increased almost 4-fold in the presence of ABA, suggesting that pyrabactin and ABA were competing with each other either at the same site or close to the active site. It is proposed that pyrabactin could be used to examine the ABA-related signal-transduction components in stomatal guard cells as well as in other plant tissues. It is also suggested that pyrabactin can be used as an antitranspirant or as a priming agent for improving the drought tolerance of crop plants
Stress Inducible Overexpression of AtHDG11 Leads to Improved Drought and Salt Stress Tolerance in Peanut (Arachis hypogaea L.)
Peanut is an important oilseed and food legume cultivated as a rain-fed crop in semi-arid tropics. Drought and high salinity are the major abiotic stresses limiting the peanut productivity in this region. Development of drought and salt tolerant peanut varieties with improved yield potential using biotechnological approach is highly desirable to improve the peanut productivity in marginal geographies. As abiotic stress tolerance and yield represent complex traits, engineering of regulatory genes to produce abiotic stress-resilient transgenic crops appears to be a viable approach. In the present study, we developed transgenic peanut plants expressing an Arabidopsis homeodomain-leucine zipper transcription factor (AtHDG11) under stress inducible rd29A promoter. A stress-inducible expression of AtHDG11 in three independent homozygous transgenic peanut lines resulted in improved drought and salt tolerance through up-regulation of known stress responsive genes (LEA, HSP70, Cu/Zn SOD, APX, P5CS, NCED1, RRS5, ERF1, NAC4, MIPS, Aquaporin, TIP, ELIP) in the stress gene network, antioxidative enzymes, free proline along with improved water use efficiency traits such as longer root system, reduced stomatal density, higher chlorophyll content, increased specific leaf area, improved photosynthetic rates, and increased intrinsic instantaneous WUE. Transgenic peanut plants displayed high yield compared to non-transgenic plants under both drought and salt stress conditions. Holistically, our study demonstrates the potentiality of stress-induced expression of AtHDG11 to improve the drought, salt tolerance in peanut
Scalable and Stable Ferroelectric Non-Volatile Memory at > 500 C
Non-volatile memory (NVM) devices that reliably operate at temperatures above
300 C are currently non-existent and remains a critically unmet
challenge in the development of high-temperature (T) resilient electronics,
necessary for many emerging, complex computing and sensing in harsh
environments. Ferroelectric AlScN exhibits strong potential for
utilization in NVM devices operating at very high temperatures (> 500
C) given its stable and high remnant polarization (PR) above 100
C/cm with demonstrated ferroelectric transition temperature (TC) >
1000 C. Here, we demonstrate an AlScN ferroelectric
diode based NVM device that can reliably operate with clear ferroelectric
switching up to 600 C with distinguishable On and Off states. The
coercive field (EC) from the Pulsed I-V measurements is found to be -5.84 (EC-)
and +5.98 (EC+) (+/- 0.1) MV/cm at room temperature (RT) and found to decrease
with increasing temperature up to 600 C. The devices exhibit high
remnant polarizations (> 100 C/cm) which are stable at high
temperatures. At 500 C, our devices show 1 million read cycles and
stable On-Off ratio above 1 for > 6 hours. Finally, the operating voltages of
our AlScN ferrodiodes are < 15 V at 600 C which is well matched and
compatible with Silicon Carbide (SiC) based high temperature logic technology,
thereby making our demonstration a major step towards commercialization of NVM
integrated high-T computers.Comment: MS and S
Developmental and tumoral vascularization is regulated by G protein-coupled receptor kinase 2
Tumor vessel dysfunction is a pivotal event in cancer progression. Using an in vivo neovascularization model,
we identified G protein–coupled receptor kinase 2 (GRK2) as a key angiogenesis regulator. An impaired
angiogenic response involving immature vessels was observed in mice hemizygous for Grk2 or in animals with
endothelium-specific Grk2 silencing. ECs isolated from these animals displayed intrinsic alterations in migration,
TGF-β signaling, and formation of tubular networks. Remarkably, an altered pattern of vessel growth
and maturation was detected in postnatal retinas from endothelium-specific Grk2 knockout animals. Mouse
embryos with systemic or endothelium-selective Grk2 ablation had marked vascular malformations involving
impaired recruitment of mural cells. Moreover, decreased endothelial Grk2 dosage accelerated tumor growth
in mice, along with reduced pericyte vessel coverage and enhanced macrophage infiltration, and this transformed
environment promoted decreased GRK2 in ECs and human breast cancer vessels. Our study suggests
that GRK2 downregulation is a relevant event in the tumoral angiogenic switch.Our laboratory is funded by grants from Ministerio de Educación
y Ciencia (SAF2011-23800), Fundación Ramón Areces,
The Cardiovascular Network (RECAVA) of Ministerio Sanidad
y Consumo-Instituto Carlos III (RD06-0014/0037 and
RD12/0042/0012), and Comunidad de Madrid (S-2010/BMD-
2332) to F. Mayor Jr. and Instituto Carlos III (PI11/00859), Fundación
Ramón Areces, and Fundación Rodríguez Pascual to P.
Penela. Marta Mendiola is supported by a postdoctoral research
contract from Fondo de Investigación Sanitaria (“Sara Borrell”
Programme), Instituto de Salud Carlos III
Satb2 acts as a gatekeeper for major developmental transitions during early vertebrate embryogenesis
Zygotic genome activation (ZGA) initiates regionalized transcription underlying distinct cellular identities. ZGA is dependent upon dynamic chromatin architecture sculpted by conserved DNA-binding proteins. However, the direct mechanistic link between the onset of ZGA and the tissue-specific transcription remains unclear. Here, we have addressed the involvement of chromatin organizer Satb2 in orchestrating both processes during zebrafish embryogenesis. Integrative analysis of transcriptome, genome-wide occupancy and chromatin accessibility reveals contrasting molecular activities of maternally deposited and zygotically synthesized Satb2. Maternal Satb2 prevents premature transcription of zygotic genes by influencing the interplay between the pluripotency factors. By contrast, zygotic Satb2 activates transcription of the same group of genes during neural crest development and organogenesis. Thus, our comparative analysis of maternal versus zygotic function of Satb2 underscores how these antithetical activities are temporally coordinated and functionally implemented highlighting the evolutionary implications of the biphasic and bimodal regulation of landmark developmental transitions by a single determinant
Coadministration of Adenoviral Vascular Endothelial Growth Factor and Angiopoietin-1 Enhances Vascularization and Reduces Ventricular Remodeling in the Infarcted Myocardium of Type 1 Diabetic Rats
OBJECTIVE - Hyperglycemia impairs angiogenesis in response to ischemia, leading to ventricular remodeling. Although the effects of overexpressing angiogenic growth factors have been studied in inducing angiogenesis, the formation of functional vessels remains a challenge. The present study evaluates the reversal of diabetes-mediated impairment of angiogenesis in the infarcted diabetic rat myocardium by proangiogenic gene therapy. RESEARCH DESIGN AND METHODS - Ad.VEGF and Ad.Ang1 were intramyocardially administered in combination immediately after myocardial infarction to nondiabetic and diabetic rats. Ad.LacZ was similarly administered to the respective control groups. The hearts were excised for molecular and immunohistochemical analysis at predetermined time points. The myocardial function was measured by echocardiography 30 days after the intervention. RESULTS - We observed reduced fibrosis and increased capillary/arteriolar density along with reduced ventricular remodeling, as assessed by echocardiography in the treated diabetic animals compared with the nontreated diabetic controls. We also observed increased phosphorylated mitogen-activated protein kinase-activated protein kinase-2, 2 days after the treatment and increased expression of vascular endothelial growth factor (VEGF), Flk-1, angiopoietin-1 (Ang-1), Tie-2, and survivin, 4 days after treatment in the diabetic animals. Gel shift analysis revealed that the combination gene therapy stimulated the DNA binding activity of nuclear factor-κB in the diabetic animals. CONCLUSIONS - Our preclinical data demonstrate the efficacy of coadministration of adenoviral VEGF and Ang-1 in increasing angiogenesis and reducing ventricular remodeling in the infarcted diabetic myocardium. These unique results call for the initiation of a clinical trial to assess the efficacy of this therapeutic strategy in the treatment of diabetes-related human heart failure
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