We report on a polymer-based porous-core photonic crystal fiber for simultaneous high-birefringent and low-loss propagation of narrowband terahertz (THz) electromagnetic waves. The high birefringence is induced by using rotated elliptical air holes inside the porous-core. numerically analyzed with an efficient finite-element method. simulation results exhibit extremely ∼0.042 very low effective material loss ∼0.07 cm−1 at operating frequency 1 THz. Moreover, we have found optimal rotation...

Background: Work related musculoskeletal disorders are a common cause of pain in female workers brick manufacturing industries involved sorting and stacking process. Objective: This study aims to categorize the component neuropathic and/or nociceptive with reference chronic low back pain, its probable causes impact on functional variables like hand grip strength, number man days lost etc. Methods: Female subjects [n=220] age range 28-45 years from different fields Hooghly Birbhum district...

—Self-excited induction generators are extensively used for wind power generation in remote and grid-isolated areas. It is challenging to maintain constant voltage frequency under variable loads speed conditions such kinds of generators. This article proposes a hybrid reactive control technique through fixed capacitor bank connected at the stator terminals strategically switched inverter source. The inverter's DC bus photovoltaic panel storage battery. scheme provides stable output with...

A study was carried out to assess the ecological aspects of Balla beel ecosystem in Moulavibazar district and affectivity ongoing biodiversity restoration program from July 2011 June 2012. Seventy-four fish species belonging 21 families were identified during period. About nine types fishing methods one type aggregating device surveyed beel. Increasing pressure illegal current jal (gill net), ber (seine net) FAD (Fish Aggregating Device) detected as reduction almost all species. 24 aquatic...

The paper present a novel multi-band compact antenna designed on the theory of fractal geometry.The is fabricated FR4 substrate.The performance proposed design analyzed and results are compared with simulations using IE-3D tool.The relevant parameters viz.resonant bands, return loss, bandwidth gain reported discussed.The VSWR less than 2 for six resonant bands in vicinity 1.15 GHz, 2.0 3.17 3.6 4.17 GHz 5.91 GHz.The exhibited by makes it extremely useful future generation wireless broadband...

We present a novel integrated method for fault detection and localization using wavelet transform of transient current (IDD) waveform. The time-frequency resolution property helps us detect as well localize faults in digital CMOS circuits. Experiments performed on an 8-bit ALU show promising results both localization.

Wound-rotor induction motor drive fed from inverters on both the stator and rotor side is discussed. The sensorless control scheme for requires a V/f-type direct frequency preferably side, with either vector or torque side. Selection of any inverter keeping flux constant possible. This will decide selection frequency. In this paper, study core loss at different injected frequencies carried out loads. Also to operate an optimum efficiency during loading condition, method correct studied. It...

This paper presents performance evaluation of an improved low cost single phase self excited induction generator (SEIG) using a three machine. machine can be used in grid isolated and remote areas as portable source power supply. The reactive requirement for this type is provided through capacitor suitable value inverter with photovoltaic (PV) module which acts dc bus to the inverter. along PV variable excitation during load wind speeds aid providing stable voltage fixed frequency....

Ultrasound strain imaging has great importance as tumor or cancerous tissues are much stiffer than normal tissues. Estimations of calculating the time delays between consecutive ultrasound echo signals common approaches in quasi-static elastography. Because ill posed nature images, estimation still remains challenging. In this paper, we present an iterative estimator that uses mutual information stochastic pre and post compressed radio frequency (RF) to define delays. For each RF signal, a...

Conventional three phase induction generators connected to wind turbines are extensively used nowadays for providing grid as well isolated loads. This paper presents an enhanced low cost single self excited generator (SEIG) using a machine. Reactive power such is provided partially through fixed capacitor and strategically inverter constant voltage frequency operation. dc source photovoltaic (PV) module the input. Appropriate experimental simulation results validate proposed strategy.

Instead of going for one renewable source improved efficiency and stability, hybridization energy sources is demonstrated. The main objective the work to do analysis different perspectives Hybrid Renewable Energy Storage Systems (HRESS) like, power architectures, mathematical modelling electronic converter topology design optimization algorithms. Non-conventional like solar wind play vital role production. Different converters with proper control strategies are illustrated maintain Direct...

Background: Substance Use Disorders (SUDs) impose significant challenges not only on individuals grappling with addiction but also the caregivers who provide support and care. The caregiving role is associated multifaceted burdens that require understanding targeted interventions. Recognizing diverse dimensions of caregiver burden crucial for offering effective support. Objective: study aimed to find out in substance use disorder patients, examining severity socio-demographic correlations,...

A simple method for on-line calculation of core losses is developed. The based on the separation loss into hysteresis and eddy current components. generated voltage a self excited induction generator (SEIG) neither purely sinusoidal nor its frequency fixed. For analysis flux wave form considered simplicity. When SEIG increases, machine also increases. This increased can make overheated during operation which may turn in to failure. So online monitoring required reliable machine. proposed...