Ranjith B Gowda - Academia.edu (original) (raw)

Papers by Ranjith B Gowda

Mini-Reviews in Medicinal Chemistry, 2022

: Polymers have an endless scope due to their flexibility, amendment, and modification with the o... more : Polymers have an endless scope due to their flexibility, amendment, and modification with the organic and inorganic compounds. There is an intense competition between natural and synthetic biodegradable polymers concerning biodegradability and compatibility with modern technology. Biodegradable polymers play a significant role in sustaining humanity on the earth due to nonenvironmental hazards. These polymers play a crucial role in biomedicine technology, such as tissue engineering, preparation of different scaffolds, drug delivery systems, industrial sector, agriculture, and food packaging. Here, we probed on various applications, challenges, and the limitations of biodegradable polymers in life.

International journal of engineering & technology, Apr 3, 2018

Adder is a basic building block in almost all the digital circuits used in todays digital world. ... more Adder is a basic building block in almost all the digital circuits used in todays digital world. Adders are used for address calculation, incrementing operation, table indices calculations and many other operations in digital processors. These operations require fast adders with reasonable design cost. Ripple carry adder (RCA) is the cheapest and most straight forward design but takes more computation time. For high speed applications Carry Look-ahead Adder (CLA) is preferred, but it has the limitation of increase in the total area of the design. Hence an adder which compromise between these two regarding area and power is Carry Select Adder (CSA). Parallel prefix adders are used to obtain quick results. In this course work, a new methodology to Modified Square Root Brent Kung adder (MSR-BK-A) is proposed to design an optimized adder and to calculate various performance parameters like area, power and delay for square root adder designs. By optimizing the structure of Binary-to-Excess-1 converter(BEC) and using it in Square Root BK adder, the power and delay can be reduced with a trade of in area. The simulated results conclude that, the MSR-BK-A with Modified BEC gives better performance in terms of power and delay. These designs have been simulated, verified and synthesized using Xilinx ISE 14.7 tool.

Zeitschrift für Naturforschung A

In this work, a highly sensitive hydrostatic pressure sensor using one-dimensional (1D) photonic-... more In this work, a highly sensitive hydrostatic pressure sensor using one-dimensional (1D) photonic-crystal (PC) is designed and analyzed numerically for its sensing performance. The device design has silicon (Si) sensing layer at the top to sense the applied pressure. The proposed sensor performance has been studied for its pressure sensing, by applying boundary load on the sensing layer. The structure is designed, simulated and analyzed using an FEM tool. As the applied pressure is varied from 0 MPa to 10 MPa, resonant mode shifts towards the higher wavelength region. The effect of defect cavity length and the number of periods are also analyzed to choose the optimized value which enhances the sensor performance parameters. Simulation result shows that the proposed sensor has a very high sensitivity of 250 nm/GPa and Q-factor of 11,120 with the transmission of 99.99%.

Biomedizinische Technik, Jan 30, 2023

A theoretical investigation of multi-layer Bragg Reflector (BR) structure to design highly sensit... more A theoretical investigation of multi-layer Bragg Reflector (BR) structure to design highly sensitive temperature sensor is proposed to measure the temperature over a wide range. Characteristic-Matrix (CM) mathematical tool is used to design and analyse the proposed temperature sensor. A 1D Distributed Bragg Reflector multi-layer structure is used to design and analyse the sensing characteristics of the proposed sensor. Periodic modulation in the Refractive-Index (RI) of the two materials, high and low, forms DBR multi-layer structure. Germanium and air are used as the two alternate materials of BR for high and low dielectric layers respectively. Parameters of many semiconductor materials, including germanium, varies with temperature. Here we have considered RI variation of germanium with the temperature to model and design the proposed sensor. A defect layer is introduced at the center of multi-layer structure to obtain the resonating mode for an incident electromagnetic wave. The sensor can detect temperature over a wide range from 100 to 550 K. A resonating mode, shifting towards different wavelength region is observed for the temperature variations. The influence of increase in the DBR layers (N) and defect cavity geometrical length (lD) is studied. The obtained results conclude that the cavity defect length and BR layers affects the sensing parameters of the designed sensor. The obtained RI sensitivity, Q-factor, temperature sensitivity and detection limit of the sensor are 2.323 μm/RIU, 115,000, 1.18 nm/K and 9.024 × 10−6 RIU respectively. Theoretically obtained transmission spectrum was validated using Monte Carlo simulation.

Apple Academic Press eBooks, May 11, 2023

Lecture notes in electrical engineering, 2021

Dielectrophoresis [DEP] is a process which results due to the particle movement in a non-uniform ... more Dielectrophoresis [DEP] is a process which results due to the particle movement in a non-uniform electric field as there is a continuous interaction of particle dipole and spatial gradient of electric field. Dielectrophoresis is one of the commonly used methods for the particle manipulation in microfluidic devices. DEP is used in the separation of microparticles such as malignant blood cells, DNA and other nano-particles. Apart from DEP, there are other techniques for sorting of particles, one of which includes centrifugation technique. Dielectrophoresis is used for sorting of blood cells, as it has the advantage of manipulating particles at microscale, because of its scaling system which is more favourable. In this work, computational analysis of separation of blood components, mainly RBC’s, WBC’s and platelets are carried out. The separation is conducted based on the properties of blood cells, which include cell size, which differs considerably from each other and dielectric properties possessed by the cells. There have been studies and experiments conducted, where a model is presented with particular electrode shape, inlets, outlets and obtained the separation of cells. Similarly, the shape and physical dimension of the electrodes can be modified to get the separation of cells at a low voltage, since the particles are affected by the electric potential applied to electrodes and get deflected in the channel medium. An effect of change in shape, applied voltage and physical dimension is studied by taking two model designs. A comparative study of these models with the existing model is studied and an optimized design is modelled and analysed for the efficient separation of blood particles. The design, modelling and simulations were performed by using FEM method.

This work proposes, the design and analysis of 1D Distributed Bragg Reflector (DBR) with a centra... more This work proposes, the design and analysis of 1D Distributed Bragg Reflector (DBR) with a central micro cavity to sense the presence of Plasmodium falciparum parasite which causes malaria disease. Early detection of malaria is a vital requirement in biomedical applications. Plasmodium falciparum parasite enter human body with the byte of infected female Anopheles mosquitoes. This parasite resides in the human Red Blood Cells and starts invading RBCs by growing and multiplying in the cell. P. falciparum undergoes various erythrocytic stages in the host RBC cells. Detection of these infected stages of RBC is utmost important by using appropriate diagnostic techniques. 1D Photonic Crystal biosensors find its application for the early detection of malignant cells. Here, a multi-layered DBR structure is designed and analyzed for the detection of P. falciparum parasite in its various stages in the analyte. The proposed structure uses N=3 layers for the initial analysis and is finally chosen as 8 layers to enhance the Q factor. The central defect cavity length is varied to choose proper defect length which gives better sensor sensitivity. The obtained sensitivity and Q factor for the proposed structure is 4500nm/RIU and 8333 respectively. Form the attained simulation results it is justifiable that the proposed sensor can be used for the detection malaria disease in its early stage.

2023 International Conference on Smart Systems for applications in Electrical Sciences (ICSSES)

Biomedical Engineering / Biomedizinische Technik

Zeitschrift für Naturforschung, Mar 28, 2023

Materials Today: Proceedings, 2022

2021 IEEE 9th Region 10 Humanitarian Technology Conference (R10-HTC)

Emerging Research in Computing, Information, Communication and Applications

Optik, 2021

In the proposed work, a multi-layered Distributed Bragg’s Reflector (DBR) Fabry Perot Microcavity... more In the proposed work, a multi-layered Distributed Bragg’s Reflector (DBR) Fabry Perot Microcavity resonator is proposed theoretically to sense bio-analyte. One dimensional Photonic-Crystal (PhC) sensor is designed and analysed to sense the presence of oral cancerous cells in the analyte. The Characteristic Matrix Method (CMM) is used to design, model and analyse the proposed sensor. A multi-layer structure with a central defect having 3 pairs of high and low refractive index layers on either side of the defect is analysed for its sensing performance. The incident light having wavelength in the range of mid-infrared frequency is used at input source, which enhances the sensor sensitivity. Five normal (INOK) cells and oral cancerous (YD-10B) cells are considered for the analysis of sensor performance. The effect of variation in the geometrical length of central defect layer and the number DBR layers on resonant wavelength, sensitivity, and Q factor is performed. The highest sensitivit...

Advances in VLSI, Signal Processing, Power Electronics, IoT, Communication and Embedded Systems, 2021