Imminent global energy-crisis and inefficient energy utilization push the use of smart energy efficient devices for display and lighting applications. Energy efficient organic light emitting diodes (OLEDs) considered as one of the most competitive candidates for new-generation smart displays and particularly for future energy-saving lighting sources.1 Recently much effort has been made to generate white OLEDs comprising of both fluorescent and phosphorescent materials. Efficient blue-emitting...

Energy efficient organic light emitting diodes (OLEDs) considered as one of the most competitive candidates for new-generation smart displays and particularly for future energy-saving lighting sources.1 Recently much effort has been made to generate white OLEDs comprising of both fluorescent and phosphorescent materials. Efficient blue-emitting materials are extremely essential for commercialization of white OLEDs and play a vital role in energy-efficient solid-state lighting and smart displa...

Recently scientific studies on integration of TDR directly with Arduino boards and XBee modules for real-time transmission of slope monitoring data were conducted as a part of Ministry of Mines, Government of India (GOI) sponsored project highlighting the impetus on urgent need of innovative Wireless techniques for mines. This paper presents a critical review of application of various communication systems for transfer of data from sensors deployed for monitoring strata behaviour to variou...

This paper presents overview of proudres for evaluaiton of undergroudn mine atmosphere in thick seams extracted by Blasting Gallery (BG) method of underground mining. After few years of discontinuance of blasting gallery method due to spontaneous heating and loss of considerable coal in goaf, the mehtod was reintroduced in typical underground mine – GDK-11 of SCCL. Salient results of strata monitoring along with evaluaiton of goaf atmosphere are presented besides few cases of strata monit...

This paper presents overview of monitoring of different environmental parameters and stability of slope in the mines areas through android. Emphasis is made on urgent requirement of application of transdisciplinary research and study the mine environmental conditions including online monitoring of mine atmosphere and mine equipment by application of wireless sensor networks and IoT devices for improved safety. Through Android smart phone, environmental monitoring parameters can be transmitted...

The Fog computing technology has come out as a feasible option to reduce the gap between cloud applications and the the physical IoT devices present at the network edge but there exists neither a common fog computing architecture nor a common accepted concept of what is fog node, how and where to deploy the fog node or how it supports real-time Internet of Things (IoT) service execution. Edge devices such as the switch, router, gateway, mobile phones, smart car etc., are the candidates for d...

This paper comprises the design of fractionalorder proportional–integral (FOPI) controller for dc-dc power converters. Dominant-pole based control technique is used for tuning the parameter values of FOPI controller. To achieve the desired time-domain performances, two equations are derived and solved to obtain values of proportional and integral coefficients of FOPI controller in terms of dominant poles. The control scheme is implemented on second-order power converters, namely dc-dc buck ...

Study of dam breach analysis is necessary because of the tragic consequences that can result in dam failure. After dam had breached, it is difficult to prevent the flood. Therefore engineers focused more over the flood management for the protection of the population at downstream of dam. This can be done by knowing different types of dam failure, by calculating the consequences of each type of failure, and by evaluating the risk associated with that failure type. In India till now 37 dam’s fa...

In this paper, the mathematical modeling of the nonideal dc-dc buck converter is carried out. The three important transfer function namely input voltage to output voltage transfer function, load current to output voltage transfer function and duty cycle to output voltage transfer function is derived in terms of non-ideal elements of buck converter operating in continuous conduction mode (CCM). All the major non-idealities which have an impact on the steady-state and dynamic behavior of buck c...

Dams are invariably used for multipurpose benefits to the society such as generation of hydropower, irrigation, water supply, flood control and others, but with associated high risk. As it retains huge amount of water, there is always a risk of formation of breach. There is a need to study the breaching aspects of a dam. In this paper a hydraulic model named MIKE11 developed by Danish Hydraulic Institute (DHI) is used to carry out simulation of flood resulting from the failure of Indravati mu...

Traffic management system plays a vital role in the presents mart city applications. In developing countries, heterogeneous lane-less traffic management is a significant challenge. This paper proposes a dual-purpose laser-based sensor configuration for vehicle classification. It classifies heterogeneous and less lane disciplined traffic based on vehicles width. This work also suggests a methodology for the vehicle to infrastructure (V2I) communication using visible light.

The dynamical behavior of charged poly-acrylic acid solutions is investigated in the presence and absence of electrolyte using dynamical light scattering measurements. An interesting non-erogodic to erogodic transition is observed for polyelectrolyte solution with addition of excess salt. Our study shows two modes of diffusive processes that are greatly influenced by inter-molecular interactions occurring inside the charged polymer systems, which in turn affect the correlation length and ther...

The phase pure polycrystalline KBiFe2O5 with space group P2/c is synthesized following solid state reaction route. The temperature dependent real and imaginary part of dielectric constant is studied over wide temperature (26˚C to 580˚C) and frequency range (100 Hz ≤ f ≤1 MHz). Two distinct anomalies at around 110˚C and 510˚C is observed in both real (ε) an imaginary (tanδ) part of dielectric constant which can be attributed to Maxwell-Wagner effect. Our DC susceptibility measurement up to roo...

Yttrium titanate (Y2Ti2O7) thin films, having pyrochlore-type structure, were synthesized in single phase by sol-gel synthesis technique. Single phase formation was confirmed by Xray diffraction (XRD) study. Surface morphology of thin films was studied by using FESEM and average grain size was found to be in nanometer range. Retention of stoichiometry in thin films was confirmed by EDX analysis. Optical property of Y2 Ti2O7 thin films was studied with the help of UV-Vis spectrometer and the ...

Ferroelectric BaTiO3 (BT) is modified with non-ferroelectric Li0.30Cr0.02Ni0.68O (LCNO) to form (1-x)BT-xLCNO (x=0, 0.02, 0.04, 0.06, 0.08) system, synthesized by solid-state reaction method. Calcination and sintering temperatures are optimized at 1100°C (4hours) and 1250°C (4hours), respectively. X-ray diffraction study confirmed a single perovskite phase with tetragonal structure in all LCNO modified ceramic samples. However, the tetragonality was found to decrease with LCNO modification. R...

Non-stoichiometric strontium bismuth tantalate (Sr0.8Bi2.15Ta2O9 /SBT) ferroelectric nano ceramic powder was obtained by using high energy ball milling process. Starting precursor powders were high energy ball milled in ethanol medium for 10 hours at a milling speed of 600rpm. For single phase formation, nano size powder of SBT was calcined at 700 oC for 30 minutes and pellet sintered at 1000 oC for 30 minutes using microwave processing technique. Microstructure of calcined SBT powder was stu...

Dielectric properties of (1-x) Epoxy – x CCTO 0-3 composites were studied as a function of frequency and temperature with in the low filler concentration region (up to 20 vol%). For all the composite samples, dielectric constant was found to be weakly frequency dependent. Room temperature (RT) dielectric constant of epoxy matrix at 1 kHz frequency was found to be ~ 4.7. Maximum RT dielectric constant ~10 (at 1 kHz) was obtained in 20 vol% CCTO incorporated composites samples with significant ...

Introduction: Coal as the primary fuel for the fossil fuel energy sector, is gradually and slowly being replaced by eco-friendly “Green Energy‟. In this scenario, it is very much important on the part of coal industry to orient itself to remain relevant in the energy sector in a sustainable manner. Coal mining provides almost 59% of coal as a source of electricity generation in India. It involves different activities to produce coal. There have been increasing concerns over environmental pr...

This paper is aimed to develop and compare precise and applicable models based on Regression Tree (RT) and Multiple Linear Regression (MLR) to predict Mean Fragment Size (MFS). In this regard, 35 blasting operations were investigated and the most influential factors on the fragmentation, i.e. Hole diameter, Depth of hole, Spacing, Burden, Stemming length and Specific charge were measured. Also, the Mean Fragment size values for the considered blasting events were carefully measured using WipF...