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In this paper, the theorems are given to discussing about two pair of weakly compatible mappings which posses a unique common fixed point of under a certain type of contraction. With the help of E. A. and CLR properties, we also prove a unique common fixed point under certain type contraction for two pairs of mappings. The proved results are helpful to extend and generalize the literature's result. To illustrate our results, some examples are provided in last. [ABSTRACT FROM AUTHOR]

Microparticle motion manipulation for effective separation is of great importance and plays major role in understanding micro-entities behavior in fluid. Study on microparticle give great insight on biological cell separation, metal isolation, pathogenic analysis for data extraction. In this work, finite element modeling of microfluidic microparticle cell sorter chip for analysis of the polystyrene particle motion manipulation based on their size. The work focuses on optimization of micro-pointed electrode geometry for separation of three different size polystyrene particle size (3 µm, 6 µm, and 9 µm). Higher separation yield and purity (99.4 and 99.8) is achieved with low micro-point angle of electrodes. [ABSTRACT FROM AUTHOR]

In this study, a novel, highly sensitive AlGaN/ GaN high electron mobility transistor (HEMT) sensor is demonstrated for the detection of cadmium ions by the functionalization of graphitic carbon nitride (g-C3N4). The preparation of g-C3N4 was done using the pyrolysis process of urea. The prepared g-C3N4 was functionalized on Au gated AlGaN/ GaN HEMT and the sensing performance was observed by the measurement of electrical characteristics of the device. The sensitivity and limit of detection of the modified g-C3N4 based AlGaN/ GaN HEMT sensor was observed as 0.2606 µA/ppb and 0.533 ppb respectively. The observed limit of detection is very low than the standard guideline values of World Health Organization (WHO) for drinking water. Furthermore, using AlGaN/GaN HEMT theory, we show that the sensing response is very fast due to the availability of 2-D electron gas (2DEG) and very sensitive due to the change in gate potential. The mechanism suggests that the decrement in the drain current was due to the reduction of Cd2+ ions on the g-C3N4 surface which generates negative redox potential at the gate terminal while exposing the functionalized HEMT to Cd2+ ions. Hence, a simple, miniaturized, sensitive and real-time sensor has been developed using AlGaN/GaN HEMT functionalized by g-C3N4 to detect Cd2+ ions in an aqueous environment. [ABSTRACT FROM AUTHOR]

In this technology driven era, effective communication is the backbone for success of any business. In Post- Covid times, effective and engaging digital communications have become integral part of our day to day lives ranging from basic online learning and education delivery to complex remote health care management. This increasing demand has given rise to introduction of many tools to support video conferencing solutions. Many of these tools have limitation that they require dedicated hardware resources and installation of software at client and host end. Increasing use of communication tools inspire us to explore the concept of video conferencing in more depth. The motivation for undertaking this research work is to develop a light-weight chat tool that facilitates peer-peer communication with minimal resources. In simple terms, just a simple web browser at both ends shall be enough to enhance user engagement with customized video calling experiences. Furthermore, many additional attributes like user login authentication, screen recording, screen sharing, text chat, multiuser chat, room management, audio/video controls have been integrated in developed tool. We also performed the performance evaluation of communication quality using various image/video quality measuring metrics like PSNR (Peak signal-to-noise ratio), SSIM (structural similarity index measure) and VMAF (Video Multi-method Assessment Fusion). Our results depict that with the joining of 2nd and 3rd video stream other than the room creator, the PSNR, SSIM and VMAF values are 28.55, 94.84, 61.24 and 26.24, 93.74, 51.62 respectively. The reduction in PSNR and other video quality metrics is observed due the fact that with addition of each user a noise element is inducted in the communicating system. A holistic performance analysis was also performed using different types of browsers and also varying room-sizes. [ABSTRACT FROM AUTHOR]

Technologies focusing on the visually impaired play an important role in assisting the visually challenged and easing their living standards. Previously there have been several other technologies and papers proposed under this category to help the visually challenged. Applications have been built, and are being developed, to help these people work independently without anybody else's need and complete daily tasks easily, without any difficulty using Artificial Intelligence. The proposed application, Noon Gil, supports voice commands and performs operations accordingly using architectures and algorithms like The technologies used are Optical Character Recognition (OCR), Convolutional Neural Networks (CNNs), Natural Language Processing (NLP), Mobile Vision API, TensorFlow Lite, Google ML Kit, MobileNet SSD, etc. Our project which is an android application with an overall accuracy of 94.74% comprises three main functions: Text Detection with an accuracy of 90.83%, Object Detection with 94.40% accuracy and barcode scanning with 99%. [ABSTRACT FROM AUTHOR]

To exploit the role of alignment of MoS2 flake in chemical sensing, here, we have synthesized the horizontally and vertically aligned MoS2 flake network using conventional chemical vapor deposition technique. The morphology and number of layers were confirmed by SEM and Raman spectroscopy, respectively. The sensing performance of horizontally aligned and vertically aligned flake network was investigated to NO2 at room temperature. Vertically aligned MoS2 based sensor showed higher sensitivity ~51.54 % and ~63.2 % compared to horizontally aligned MoS2 sensor’ sensitivity of ~35.32 % and ~45.2 % to 50 ppm and 100 ppm NO2, respectively. This high sensitivity attributed to the high aspect ratio and high adsorption energy on the edge site of vertically aligned MoS2. [ABSTRACT FROM AUTHOR]

Molybdenum disulfide (MoS2), a just three atoms thick semiconductor has opened up new avenues in gas sensing because of its high surface–to-volume ratio. However, the low sensitivity, incomplete recovery and poor selectivity at room temperature restricts its uses for practical gas sensors. Here, we report a facile strategy to develop highly sensitive, extremely selective and fully recoverable gas sensor at room temperature through photo excitation. Although, pristine MoS2 gas sensor showed a considerable response and incomplete recovery to NO2 at room temperature. Though after photo excitation, the MoS2 sensor exhibited an improved response along with the complete recovery upon NO2 exposure. [ABSTRACT FROM AUTHOR]

In this report, the hydrogen gas sensing properties based on Co doped ZnO nanostructures are explored. The undoped and Co doped nanostructures were grown by RF magnetron sputtering system, and its structural, morphological, and hydrogen sensing behavior are investigated. The maximum relative response was occurred by the 2.5% Co doped ZnO nanostructures among undoped and other doped sensors. The enhancement of relative response might be due to large chemisorbed sites formation on the ZnO surface for the reaction to hydrogen gas. [ABSTRACT FROM AUTHOR]

Graphene was synthesized and used as a counter electrode in place of platinum in dye sensitized solar cells. This study reveals that the graphene synthesized by reduction of graphene oxide still contains functional groups even after reduction. The synthesized graphene counter electrodes were prepared by screen printing fabrication techniques. The influence of temperature variation on the films morphology, crystallinity, and its interfacial adhesiveness to the fluorine doped tin oxide coated glass were studied. Screen printing technique has shown uniform surface, decreased agglomeration of nanoparticles and high film adhesiveness. The screen printed film annealed at 400°C reveals best surface morphology [ABSTRACT FROM AUTHOR]

A new type of counter electrode for dye sensitized solar cells has been fabricated using a stainless steel sheet as substrate and graphite, graphene and multiwall carbon nanotubes as the catalytic material which applied by screen printing technique. The sheet resistances of the substrates and there influence on the dye sensitized solar cells has been studied. The fabricated counter electrodes i.e. SS-graphite, SS-graphene SS-MWCNT and SS-platinum were tested for their photovoltaic response in the form of dye sensitized solar cells. [ABSTRACT FROM AUTHOR]