80 research outputs found
An Improved `DC-DC Type' High Frequency Transformer-Link Inverter by Employing Regenerative Snubber Circuit
This work proposes a bidirectional high frequency (HF) link inverter using center-tapped high frequency transformer. The main advantage of this topology is the reduced size of the converter. However the utilization of the high frequency transformer results in the occurrence of high voltage spike at its secondary. To solve this problem, we incorporate a regenerative snubber to clamp the spike and subsequently feed the energy back to the power circuit. The inverter also utilizes less number of switches, which results in lower conduction and switching losses. This paper describes some of the important aspects of the snubber design. It is verified with a 1 kW inverter prototyp
Removing Digital Addiction: Through Digital Detoxication
Over-reliance on digital devices like cell phones, tablets, and iPad, has led to an individual using multiple digital devices the majority of the time when he or she is awake. Multiple device usage leads to an unconscious addictive use of a device that culminates in persistent information overload. This addictive use leads to information overload that continues even when the device is not being used or the individual is sleeping. We seek to explore if a digital detoxification app can remove digital addiction and create an impactful and healthy device usage, resulting in impactful device usage. Researchers have talked about the need for digital detoxification or digital cleansing. The popular remedies available include increased physical activities like yoga and meditation. We propose a digital detoxification model that can be used for mandatory service application of a device or the hedonistic use of an entertainment device. This model will allow individuals to use digital devices to the extent that it does not lead to addiction side effects like technostress, anxiety, insomnia, and information overload, thereby reducing digital addiction. This app will prevent an individual from unnecessarily utilizing the device while promoting optimal use, facilitating digital detoxication, and minimizing digital addiction. The digital detoxification apps will be available from all the publicly available app stores and allow the end-users to develop healthy habits and then detoxify from excessive use of the device. These apps will activate and prevent the end-user from excessively using the device. The individual will identify the safe usage time of the device. The app will activate features like airplane mode to ensure that excessive device usage is prevented and does not lead to digital toxification
Duality in N=1, D=10 Superspace and Supergravity with Tree Level Superstring Corrections
The equations of motion (e.m.'s) of the N=1, D=10 anomaly free supergravity,
obtained in the framework of the superspace approach, are analyzed. The formal
equivalence of the usual and dual supergravities is discussed at the level of
e.m.'s. The great simplicity of the dual formulation is established. The
possibillity of the lagrangian formulation of the dual supergravity is pointed
out. The bosonic part of the lagrangian is constructed including anomaly
compensating superstring corrections.Comment: It is the revised version where the spelling mistake in the Title is
corrected. LaTeX, 11 pages, no figure
Intelligent Image Capturing Alarm System Using Raspberry Pi
Home surveillance system assumes an essential part in this present day living style to help recognizing illegal activities. In this proposed paper, an intelligent image capturing alarm system to protect locker was developed. Raspberry Pi 2 is used as the main controller (server). At the point when any conceivable intrusion is identified, a webcam installed to Raspberry Pi 2 will capture the picture of the intruder. In the meantime, the spotlight or light of the house which represented by an LED will be turned "ON" alongside an alarm sound from a buzzer which is fixed as an output. Taking everything into account, this improvement offers reasonable and easy to use surveillance alarm system
Operator Regularization and Large Noncommutative Chern Simons Theory
We examine noncommutative Chern Simons theory using operator regularization.
Both the zeta-function and the eta-function are needed to determine one loop
effects. The contributions to these functions coming from the two point
function is evaluated. The U(N) noncommutative model smoothly reduces to the
SU(N) commutative model as the noncommutative parameter theta_{mu nu} vanishes
Study on Different Range of NIR Sensor Measurement for Different Concentration of Glucose Solution
The development of noninvasive methods to replace the conventional finger pricking method to measure the blood glucose concentration is developing rapidly. This study was conducted to evaluate different wavelength of near infrared (NIR) sensors that is going to be the best in measuring the glucose concentration samples that was prepared. Three different wavelengths of NIR sensor are used for the testing, 800 nm, 940 nm and 950 nm. Several experiments were conducted to find the relationship between the output voltages and glucose concentration. The results of the experiments proved that the linear relationship between output voltages and glucose concentration is significant for all NIR sensors used and the NIR sensor with a wavelength of 940 nm shows the best fit
Induced vacuum energy-momentum tensor in the background of a d-2 - brane in d+1 - dimensional space-time
Charged scalar field is quantized in the background of a static d-2 - brane
which is a core of the magnetic flux lines in flat d+1 - dimensional
space-time. We find that vector potential of the magnetic core induces the
energy-momentum tensor in the vacuum. The tensor components are periodic
functions of the brane flux and holomorphic functions of space dimension. The
dependence on the distance from the brane and on the coupling to the space-time
curvature scalar is comprehensively analysed.Comment: 32 pages, 3 figures, journal version, some references adde
Elastic and quasi-elastic and scattering in the Dipole Model
We have in earlier papers presented an extension of Mueller's dipole cascade
model, which includes sub-leading effects from energy conservation and running
coupling as well as colour suppressed saturation effects from pomeron loops via
a ``dipole swing''. The model was applied to describe the total and diffractive
cross sections in and collisions, and also the elastic cross
section in scattering.
In this paper we extend the model to describe the corresponding quasi-elastic
cross sections in , namely the exclusive production of vector mesons
and deeply virtual compton scattering. Also for these reactions we find a good
agrement with measured cross sections. In addition we obtain a reasonable
description of the -dependence of the elastic and quasi-elastic
cross sections
The E_{11} origin of all maximal supergravities
Starting from the eleven dimensional E_{11} non-linear realisation of
M-theory we compute all possible forms, that is objects with totally
antisymmetrised indices, that occur in four dimensions and above as well as all
the 1-forms and 2-forms in three dimensions. In any dimension D, the D-1-forms
lead to maximal supergravity theories with cosmological constants and they are
in precise agreement with the patterns of gauging found in any dimension using
supersymmetry. The D-forms correspond to the presence of space-filling branes
which are crucial for the consistency of orientifold models and have not been
derived from an alternative approach, with the exception of the 10-dimensional
case. It follows that the gaugings of supergravities and the spacetime-filling
branes possess an eleven dimensional origin within the E_{11} formulation of
M-theory. This and previous results very strongly suggest that all the fields
in the adjoint representation of E_{11} have a physical interpretation.Comment: 54 page
Scaling Rule for Nonperturbative Radiation in a Class of Event Shapes
We discuss nonperturbative radiation for a recently introduced class of
infrared safe event shape weights, which describe the narrow-jet limit.
Starting from next-to-leading logarithmic (NLL) resummation, we derive an
approximate scaling rule that relates the nonperturbative shape functions for
these weights to the shape function for the thrust. We argue that the scaling
reflects the boost invariance implicit in NLL resummation, and discuss its
limitations. In the absence of data analysis for the new event shapes, we
compare these predictions to the output of the event generator PYTHIA.Comment: 23 pages, 3 figures, uses JHEP3.cls (included); v2 - version to
appear in JHE
- …