135 research outputs found
Furnace Oil as an Alternative Fuel in Heating Furnace for Bending Plates
This topic is based on the operation of Heating Furnace for the purpose of bending of the plates in the Industry which is used for Tower Manufacturing. The material or the metal used for the Tower manufacturing are Mild Steel (M.S.) Plates.LPG is commonly used as a fuel in the heating furnace for bending operation. As the cost of LPG affects the production, Furnace Oil as an alternative fuel if considered for the heating furnace operation can be used for bending of plates used in Tower manufacturing. Here, as a consideration of fuel will be on the basis o availability, cost, flash point , calorific value etc
Using single quantum states as spin filters to study spin polarization in ferromagnets
By measuring electron tunneling between a ferromagnet and individual energy
levels in an aluminum quantum dot, we show how spin-resolved quantum states can
be used as filters to determine spin-dependent tunneling rates. We also observe
magnetic-field-dependent shifts in the magnet's electrochemical potential
relative to the dot's energy levels. The shifts vary between samples and are
generally smaller than expected from the magnet's spin-polarized density of
states. We suggest that they are affected by field-dependent charge
redistribution at the magnetic interface.Comment: 4 pages, 1 color figur
Solving rate equations for electron tunneling via discrete quantum states
We consider the form of the current-voltage curves generated when tunneling
spectroscopy is used to measure the energies of individual electronic energy
levels in nanometer-scale systems. We point out that the voltage positions of
the tunneling resonances can undergo temperature-dependent shifts, leading to
errors in spectroscopic measurements that are proportional to temperature. We
do this by solving the set of rate equations that can be used to describe
electron tunneling via discrete quantum states, for a number of cases important
for comparison to experiments, including (1) when just one spin-degenerate
level is accessible for transport, (2) when 2 spin-degenerate levels are
accessible, with no variation in electron-electron interactions between
eigenstates, and (3) when 2 spin-degenerate levels are accessible, but with
variations in electron-electron interactions. We also comment on the general
case with an arbitrary number of accessible levels. In each case we analyze the
voltage-positions, amplitudes, and widths of the current steps due to the
quantum states.Comment: REVTeX 4, 10 pages, 12 figures, submitted to Phys. Rev. B. Associated
programs available at http://www.ccmr.cornell.edu/~ralph
Quantum noise limited microwave amplification using a graphene Josephson junction
Josephson junctions (JJ) and their tunable properties, including their
nonlinearities, form the core of superconducting circuit quantum
electrodynamics (cQED). In quantum circuits, low-noise amplification of feeble
microwave signals is essential and the Josephson parametric amplifiers (JPA)
are the widely used devices. The existing JPAs are based on Al-AlOx-Al tunnel
junctions realized in a superconducting quantum interference device geometry,
where magnetic flux is the knob for tuning the frequency. Recent experimental
realizations of 2D van der Waals JJs provide an opportunity to implement
various cQED devices with the added advantage of tuning the junction properties
and the operating point using a gate potential. While other components of a
possible 2D van der Waals cQED architecture have been demonstrated -- quantum
noise limited amplifier, an essential component, has not been realized. Here we
implement a quantum noise limited JPA, using a graphene JJ, that has linear
resonance gate tunability of 3.5 GHz. We report 24 dB amplification with 10 MHz
bandwidth and -130 dBm saturation power; performance on par with the best
single-junction JPAs. Importantly, our gate tunable JPA works in the
quantum-limited noise regime which makes it an attractive option for highly
sensitive signal processing. Our work has implications for novel bolometers --
the low heat capacity of graphene together with JJ nonlinearity can result in
an extremely sensitive microwave bolometer embedded inside a quantum
noise-limited amplifier. In general, our work will open up exploration of
scalable device architecture of 2D van der Waals materials by integrating a
sensor with the quantum amplifier.Comment: 15 pages, 4 figures, and supplementary informatio
Public Perception of the Fifth Generation of Cellular Networks (5G) on Social Media
With the advancement of social media networks, there are lots of unlabeled reviews available online, therefore it is necessarily to develop automatic tools to classify these types of reviews. To utilize these reviews for user perception, there is a need for automated tools that can process online user data. In this paper, a sentiment analysis framework has been proposed to identify people’s perception towards mobile networks. The proposed framework consists of three basic steps: preprocessing, feature selection, and applying different machine learning algorithms. The performance of the framework has taken into account different feature combinations. The simulation results show that the best performance is by integrating unigram, bigram, and trigram features
Targeted copy number variant identification across the neurodegenerative disease spectrum
Background: Although genetic factors are known to contribute to neurodegenerative disease susceptibility, there remains a large amount of heritability unaccounted for across the diagnoses. Copy number variants (CNVs) contribute to these phenotypes, but their presence and influence on disease state remains relatively understudied. Methods: Here, we applied a depth of coverage approach to detect CNVs in 80 genes previously associated with neurodegenerative disease within participants of the Ontario Neurodegenerative Disease Research Initiative (n = 519). Results: In total, we identified and validated four CNVs in the cohort, including: (1) a heterozygous deletion of exon 5 in OPTN in an Alzheimer\u27s disease participant; (2) a duplication of exons 1–5 in PARK7 in an amyotrophic lateral sclerosis participant; (3) a duplication of \u3e3 Mb, which encompassed ABCC6, in a cerebrovascular disease (CVD) participant; and (4) a duplication of exons 7–11 in SAMHD1 in a mild cognitive impairment participant. We also identified 43 additional CNVs that may be candidates for future replication studies. Conclusion: The identification of the CNVs suggests a portion of the apparent missing heritability of the phenotypes may be due to these structural variants, and their assessment is imperative for a thorough understanding of the genetic spectrum of neurodegeneration
Non–Small Cell Lung Cancer: Prognostic Importance of Positive FDG PET Findings in the Mediastinum for Patients with N0–N1 Disease at Pathologic Analysis
In non-small cell lung cancer, preoperative evaluation of the mediastinum with PET may complement the surgical and histologic findings
Neuropsychiatric Symptom Burden across Neurodegenerative Disorders and its Association with Function
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