Heritage Institute of Technology

About: Heritage Institute of Technology is a based out in . It is known for research contribution in the topics: Steganography & Support vector machine. The organization has 581 authors who have published 1045 publications receiving 8345 citations.

Infrared irradiation aided fabrication of Mn impregnated-natural bone adsorbent: Efficacy evaluation in aqueous Cr(VI) removal

Abstract: Novel adsorbents were developed through impregnation of manganese oxide on turkey bone by both conventional air-drying and infrared-aided-freeze-drying protocols. The adsorbents were characterized through TGA, XRD, SEM, FTIR, and BET-BJH analyses. The efficacy of the adsorbents were assessed in the adsorption of Cr(VI) from water. Under optimal pH 3.0 and 300 rpm agitation rate, the maximum static adsorption capacities of freeze-dried and air-dried adsorbents were 96.29 ± 1 mg/g and 88.65 ± 1 mg/g, respectively for 100 mg/L Cr(VI) solution. Adsorption on both air-dried (BET area 43.04 m 2 /g and 0.0553 cc/g pore volume) and freeze-dried (BET area 84.8 m 2 /g and 0.1571 cc/g pore volume) adsorbents were best fitted with Freundlich isotherm and pseudo-second-order kinetic model. Freeze-dried adsorbent exhibited greater spontaneity in Cr(VI) removal compared to its air-dried counterpart at lower temperature, as revealed through standard free energy change.

Adaptive Fuzzy Control of Inverted Pendulum with a Fuzzy-Based Set-Point Weighting Scheme

Abstract: This paper presents a solution to the control problem of inverted pendulum, in presence of model uncertainties due to its varying pendulum mass and length. Here, a fuzzy PD controller is proposed which is continuously tuned and updated by a non-fuzzy adaptive scheme. In addition to the proposed tuning scheme, a fuzzy-based set-point weighing scheme is also incorporated for effective control in load variations. The application of the proposed fuzzy-based set-point weighting self-adaptive fuzzy PD controller (FSW-SAFPDC) stabilized the pendulum in an upright position in minimum time and the cart returned to its initial position.

Modeling of Lead-Free CH 3 NH 3 SnI 3 -Based Perovskite Solar Cell Using ZnO as ETL

Abstract: Over the last few decades, researchers have invested enormous research effort into inorganic/organic solar cells like dye-sensitized solar cells (DSSCs) due to its cost-effectiveness and simple fabrication process, over the conventional photovoltaic solar cells made of different materials like Si, Ge, GaAs, GaInPh. In 2012, the solid-state perovskite materials are organic–inorganic metal trihalide materials, having chemical formula ABX3 and having specific crystal structure as calcium titanium oxide (CaTiO3) revolutionized as the light-harvesting, absorbing materials. In past couple of years, perovskite solar cells have shown significant improvement in terms of efficiency and crossed the 20% efficiency level. There has been a consistent approach among researchers to explore different materials as electron transport layer of the perovskite solar cells to improve the performance of the solar cells. The most common perovskite material used in solar cell is methyl ammonium lead iodide (CH3NH3PbI3) along with top and bottom layer of HTO and ETO. In this work, the toxic material lead iodide (PbI3) is replaced with tin oxide (SnI3), and this perovskite material CH3NH3SnI3 introduced with an ETO layer of ZnO has achieved a significant efficiency of 22.90%. In this work, zinc oxide (ZnO) layer is proposed as the electron transport layer for lead-free CH3NH3SnI3-based perovskite solar cells. The proposed structure is “metal contact/spiro-MeOTAD/CH3NH3SnI3/ZnO/TCO/metal contact,” and the structure is modeled using SCAPS simulating tool.

Transmission line model for analysis of microstrip travelling wave antennas with right angled bends

Abstract: A simple but accurate transmission line model for the analysis of microstrip travelling wave antennas based on microstrip lines and right angle bends is described. Radiated far fields from the antenna are calculated using magnetic current on the antenna sidewalls and electric current on the strip surface. Local reflections from the right angle discontinuity are considered in internal field calculations. An equivalent decay constant to accommodate the radiated power from the antenna is introduced which is iteratively computed to improve impedance and radiation characteristics calculated by the model. Total power lost in the line due to this equivalent decay constant is equal to the total power radiated from the antenna. A rampart line antenna having three unit cells is fabricated in the C band and the results from the model are compared with those from full wave MoM simulations and practical measurement with good agreement. This simple yet accurate model would be valuable in computer aided design for optimal microstrip line based antennas with minimal computational resources.