Nanobiosensors: A powerful Technology for Early Detection of Plant Parasitic Nematodes
AbstractNanotechnology emerged as a critical force in agriculture and the most vital technology. Nanobiotechnology offers significant benefits for farmers to control their output by regulating nutrient use via nano-fertilizers, rationalizing agrochemical use, detecting, and treating disease–host interactions, molecular interactions with nanocarriers (nano biosensors) for plant disease diagnosis, and removing contaminants from water and soil, farm man agement, and current trends include salinity soil treatment. Nanosensors can also detect pathogens, moisture, fertilizers, and acidity of soil to improve products used to ...
Source: Sensing and Imaging - April 22, 2024 Category: Biomedical Engineering Source Type: research
Enhancing the performance of an InAsSb/InAlSb-based pBn photodetector for early detection of a biomarker of bone marrow cancer: a proposed and simulated approach with extended-midwave response and step-graded barrier design
In this study, we introduce a new extended-mid-wavelength InAsSb-based pBn architecture infrared barrier photodetector with an InAlSb compositional step-graded barrier (SGB), referred to as SGB-pBn-PD, designed specifically to detect a biomarker of bone marrow cancer. Our device outperforms conventional design by replacing the compositional uniform barrier with a step-graded barrier, resulting in improved alignment of the valence band in the barrier and absorber interface, and reduced dark current density via suppression of the Shockley –Read–Hall process. Our simulations show that the dark current density of this dete...
Source: Sensing and Imaging - April 22, 2024 Category: Biomedical Engineering Source Type: research
Validation of ALOS/PALSAR Subsurface Penetration Depth in Farafra Oasis as an Arid Region Based on Field Ground-Penetrating Radar Measurements
AbstractIn the last few years, ALOS/PALSAR (L-band) (HH, HV, VH, and VV) images have been widely used due to their ability to penetrate the surface in certain conditions, such as low moisture or dry friable sandy soil. Images from the ALOS sensor were used to delineate subsurface structures and optical images such as Landsat-7 ETM + data were used to discriminate between scatterings from the Earth’s surface and subsurface materials. Thus, the Farafra Desert is an optimal geological environment for L-band microwave penetration, as its geology is characterized by friable sand sheets covering limestone (Tarawan Formati...
Source: Sensing and Imaging - April 18, 2024 Category: Biomedical Engineering Source Type: research
Comparative Simulation Study of InGaN and Silicon Channel Stack Oxide Twin Gate Field Effect Transistor Based Ammonia Gas Sensor
AbstractThis work reports a comparative analysis between Indium Gallium Nitride (InGaN) channel stack oxide twin gate field effect transistor (SO-TG-FET) and Silicon (Si) channel stack oxide twin gate field effect transistor for the detection of ammonia (NH3) gas. Catalytic metal gate of Cobalt (Co) with stacking of SiO2/HfO2 is used to detect presence of NH3.The interaction of ammonia gas molecules with Co metal gate of SO-TG-FET causes a remarkable variation in the sensitivity parameters like drain current (OFF and ON), surface potential, threshold voltage, switching ratio and transconductance. The OFF current sensitivit...
Source: Sensing and Imaging - April 16, 2024 Category: Biomedical Engineering Source Type: research
Ultra-Sensitive Plasmonic Sensor for Detecting Honey Adulteration with III –V Nitride and Tungsten Disulfide
AbstractOwing to its phytochemical and antioxidant properties, honey has gained recognition as a therapeutic agent for various ailments, leading to its prominent role in the food industry. However, this popularity has also given rise to the significant problem of honey adulteration, posing a major challenge for the food industry. The present study explores the utilization of the wurtzite nitride semiconductor material, in combination with tungsten disulfide (WS2), within the surface plasmon resonance (SPR) sensor design for the detection of honey adulteration. The sensor ’s structure is based on the BK7 glass prism with ...
Source: Sensing and Imaging - April 12, 2024 Category: Biomedical Engineering Source Type: research
Temperature Dependence and Potential of Nebulizer Spray Pyrolysis on Zinc Stannate (ZnSnO3) Thin Films for Ammonia Gas Sensors
This study focuses on the preparation and characterization of Zinc stannate (ZnSnO3) thin films using a nebulizer spray pyrolysis technique at different substrate temperatures ranging from 300 to 500 °C. The films were analyzed using X-ray diffraction, scanning electron microscopy, energy dispersive X-ray analysis, ammonia gas sensitivity, electrical conductivity, and optical measurements. The XRD analysis revealed the presence of distinct crystallographic planes and improved crystallinity wi th increasing deposition temperature. SEM analysis showed a transition from amorphous to nanorod structures with increasing tempe...
Source: Sensing and Imaging - April 4, 2024 Category: Biomedical Engineering Source Type: research
A Flexible Rectangular PCB Coil to Excite Uniform Magnetic Field in Nuclear Magnetic Resonance Spectroscopy: Design, Optimization and Implementation
AbstractIn this article, a rectangular coil in the form of a flexible printed circuit board (F-PCB) with FR4 substrate is designed and fabricated. Owing to its flexibility, the coil can be curved which facilities its use in nuclear magnetic resonance (NMR) spectroscopy. Two samples of this F-PCB coil are faced each other in place, aiming to achieve a range with a uniform magnetic field in the middle of the coils. The performance of the proposed structure is compared with a planar PCB structure. Although the developed coil is intended for NMR spectroscopy, it can also be used in other applications such as wireless power tra...
Source: Sensing and Imaging - March 20, 2024 Category: Biomedical Engineering Source Type: research
A Facile Colorimetric Sensor for Sensitive Detection of Nitrite in the Simulated Saliva
AbstractRapid on-site monitoring of nitrite as a diagnostic biomarker has drawn considerable attention in recent years. However, conventional detection techniques face limitations in terms of portability and ease of usage. In this work microfluidic paper based colorimetric sensor ( µPCS) is developed for detection of nitrite from simulated saliva sample using Griess reagent. We discovered that the chemical nature of the filter papers has significant effect on the analytical sensitivity of nitrite detection. Among different paper substrate tested, the glass microfiber filter ( GMF) paper exhibits exceptional detection sens...
Source: Sensing and Imaging - March 18, 2024 Category: Biomedical Engineering Source Type: research
Flood Mapping and Damage Assessment using Ensemble Model Approach
This study focuses on generating flood maps using synthetic aperture radar images from the Sentinel-1 (COPERNICUS/S1_GRD) satellite. Further study includes damage assessments in seven different sectors: urban land, agricultural land, forest land, barren land, range land, permanent water bodies, and unknown. This forecasts how much of the land in these 7 areas was affected by flooding. For the aforementioned land use and land cover classifications, the study proposes the best-fitting ensemble model, which is the aggregate of 3 image segmentation models that are Resnet34, InveptionV3, and VGG16. These three models are tra...
Source: Sensing and Imaging - March 4, 2024 Category: Biomedical Engineering Source Type: research
Polydimethylsiloxane (PDMS) Coated Broadband Tunable Vanadium Dioxide (VO2) Based Linear Optical Cavity Temperature Sensor
In this study we presented polydimethylsiloxane (PDMS) coated SOI based linear optical temperature sensing resonator model and analysed it in finite element method by using COMSOL Multiphysics. The phase changing material (PCM) VO2 on each side of the Si waveguide helped to achieve the resonant condition and thermal tunability of the resonator. An almost linear variation in resonant frequency (wavelength) fr due to the temperature change in the range of 0 –90 °C resulted in maximum sensitivity of 0.01 THz/°C or 79.4 pm/°C for the 10 µm cavity length. The recorded sensitivity is at least 5-times (or more) higher tha...
Source: Sensing and Imaging - February 26, 2024 Category: Biomedical Engineering Source Type: research
Hybrid Optimization Enabled Segmentation with Deep Learning For Histopathological Images of Uterine Tissue
AbstractThe technique of modifying an image to make it better suited for a certain use than the original image is known as image enhancement. Digitalized picture enhancement systems provide numerous choices for improving image visual quality. Imaging modalities, observation settings, and other factors all have a substantial impact on the appropriate choosing of various methodologies. The Fractional Pelican Crow Search Algorithm improved SQA (FPCSO_ enhanced SQA) is a novel image enhancement technique for histopathology imaging of uterine tissue that is provided here. The database is initially generated, and the image is fo...
Source: Sensing and Imaging - February 17, 2024 Category: Biomedical Engineering Source Type: research
A Compact Ultrawideband Antipodal Vivaldi Antenna and Its Efficacy in Through-Wall Imaging
AbstractAn ultrawide band (UWB) antipodal Vivaldi antenna (AVA) is presented in this paper for through wall imaging application. The traditional Vivaldi antenna is modified by introducing asymmetric elliptical slots at the edges, an extended dielectric substrate and modified ground. The fabricated antenna prototype is of compact size of 119 × 70 mm2. The measurement in anechoic chamber shows a ultrawide operating band from 1.85 to 9.2 GHz and the peak gain of 9.2 dBi. Both simulation and experimental results for the S11 and Gain are presented and compared which come in close agreement. Further, the designed antenna i...
Source: Sensing and Imaging - February 17, 2024 Category: Biomedical Engineering Source Type: research
The measurement of changes in water content during hemodialysis: a non-invasive millimeter wave sensing technology
Conclusions: The change of water content in the blood was obtained by measuring the permittivity of the blood during hemodialysis. The technique is proven for detecting changes in water content in the blood. The sensor structure and detection method have great clinical application value. (Source: Sensing and Imaging)
Source: Sensing and Imaging - February 15, 2024 Category: Biomedical Engineering Source Type: research
Defect Detection Based on Improved YOLOx for Ultrasonic Images
AbstractNon-destructive testing is a method of detecting defects in materials or electronic components without causing damage to the detected objects. The most commonly used detection technology is ultrasonic detection. However, for images generated by ultrasonic inspection, manual recognition and traditional image processing methods are mostly used for defect identification, which are both inefficient and costly. The detection of defects in printed circuit boards (PCB) is a particularly difficult problem in the field of industrial inspection, which has strict requirements. We adopt a deep learning method to implement inte...
Source: Sensing and Imaging - February 3, 2024 Category: Biomedical Engineering Source Type: research
Single Device-Based Deep Learning Approach for Geographical Position Spoofing Detection on an Instant Messaging Platform
AbstractWith the quick growth of digital technology, image transferring is the most common process over the internet. Now, location registration on mobiles has become trendier in social media. At the same time, the criminals can modify the geo-position location as per their needs. Hence, there is a need to detect the genuineness of geo-position. Currently available techniques for spoofing detection fail to detect prior information and they are effective for small databases. Hence, the efficient deep learning-based geo-position spoofing detection technique is developed for the IM platform. The residual noise that exists in ...
Source: Sensing and Imaging - February 3, 2024 Category: Biomedical Engineering Source Type: research
