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[IEEE 2018 International Conference on Advances in Computing, Communications and Informatics (ICACCI) - Bangalore (2018.9.19-2018.9.22)] 2018 International Conference on Advances in Computing, Communications and Informatics (ICACCI) - Implementation and Design Issues for Augmented Reality Applications on Mobile Platforms
摘要： This paper presents the factors that an Augmented Reality application designer must look at whilst implementing AR applications on mobile platforms. There are certain implementation and design issues that are critical to the success of an AR application. The trigger response time (TRT) and mobile platform battery consumption are the two main parameters that are looked at in the research preseted. The test application was designed using a combination of Vuforia, Unity and Blender platforms, and the mobile platform used was an Android based One Plus 3T phone. The results discuss the impact of trigger image complexity, 3d object complexity and ambient light on the response time and battery life.
关键词： response time,battery life,trigger image,mobile phone,Augmented Reality,Android application,3d Object
更新于2025-09-23 15:23:52
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Comparison between Ferromagnetic and Ferroelectric Optical Switch Devices in Terms of the Response to the Electric Field
摘要： In this work we have studied the electro-optical effect of two types of ferronematic nanoparticles. The first sample doped with magnetic material Fe3O4 and the second sample doped with a ferroelectric material SbSI. The difference in the two types of material that has been vaccinated led to different values of electro-optic properties because of the different susceptibility of materials. We have noticed that the material SbSI was more responsive to the applied electric field due to the nature of the constituent material (electric material) than the Fe3O4 ferromagnetic. The response time for the material SbSI is less than the response time of the ferromagnetic Fe3O4, that led to make the material SbSI best in the optical switch applications.
关键词： Electro-Optic Properties,Response Time,Fall Time,Rise Time,Ferronematic (FN),Threshold Voltage
更新于2025-09-23 15:22:29
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Humidity effect on adsorption kinetics of ammonia onto electrospun SnO <sub/>2</sub> nanofibers
摘要： Tin dioxide nanofibers were successfully synthesized by electrospinning homogeneous solution of SnCl4·5H2O in polyvinyl alcohol (PVA) and the potential of SnO2 nanofibers as ammonia sensing element at room temperature were also investigated. A logarithmic dependence of sensitivity on ammonia concentration was observed. We further investigate the effect of relative humidity between 0% and 70% on ammonia sensing performance of SnO2 nanofibers based conductometric sensor for the first time. Sensing experiments showed that both the baseline sensor current and the response-recovery characteristics of the SnO2 based sensor modified by pre humidification of sensing layer' surface. To study the adsorption kinetics pseudo first order and Elovich models was used and the first order kinetic model best describes the ammonia adsorption onto the SnO2 nanofibers for low concentrations (≤80 ppm) of ammonia, irrespective of humidity level. On the other hand, the results describe the best representation of Elovich model, as evidenced by the high correlation coefficients, for high concentrations of ammonia gas.
关键词： adsorption kinetics,humidity effect,ammonia sensing,electrospinning,response time
更新于2025-09-23 15:22:29
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Influence of Ag NPs on Silicon Nanocolumns NH <sub/>3</sub> Gas Sensors
摘要： Two NH3 gas sensor devices, Al/Si nanocolumns/n-Si/Al and Al/Ag NPs/Si nanocolumns/n-Si/Al hybrid structures, have been fabricated and tested. A bare silicon nanocolumns layer was synthesized by a laser-assisted electrochemical etching process in HF solutions. The surface morphology of bare Si nanocolumns was modified by incorporating Ag NPs into Si nanocolumns by simple and fast immersions methods in an aqueous solution of AgNO3 to synthesize a hybrid structure. Characteristic features of bare Si nanocolumns and hybrid structure were investigated using scanning electron microscopy, EDS analysis, FTIR spectra, X-ray diffraction, and photoluminescence spectra (PL). The electrical characteristics of sensors with and without NH3 gas were measured at room temperature. The results showed that the nanoparticles grain size, nature, specific surface area (S.S.A) of Ag NPs, and morphological structure of the Si nanocolumns strongly affected the property characteristics. A significant enhancement in sensitivity, response, and recovery times of gas sensor for a hybrid structure was realized after compared with Al/Si nanocolumns/n-Si/Al gas sensor due to the high specific surface area.
关键词： silicon nanocolumns,response time,NH3 gas sensor,sensitivity,Ag NPs,hybrid structure,recovery time
更新于2025-09-23 15:21:01
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Enhanced electro-optical response of nematic liquid crystal doped with functionalised silver nanoparticles in twisted nematic configuration
摘要： The dipolar and surface plasmon properties of metallic nanoparticles, especially gold and silver NPs made them suitable candidates for doping with LC system, which provides faster switching time, low power consumption in the display devices. The doping of NPs in the LC system influences the physical properties such as dielectric anisotropy, optical anisotropy, elastic constants, viscosity, and conductivity. In this work, we report the effect of doping of hexane thiol functionalized silver nanoparticles (f-AgNps) of average diameter 3-5nm on the electro-optical switching properties of nematic LC 4-trans-pentyl-cyclohexyl cyanobenzene (5PCH) in the twisted nematic geometry. The threshold as well as switching voltages have also reducedin the nanocomposites of 5PCH compared to pure 5PCH. The steepness of the V-T graph necessary for better multiplexing performance and high contrast has increased by 230% in the 0.025 wt% of f-AgNPs doped 5PCH compared to pure 5PCH. The ion current for 0.025 wt% f-AgNPs doped nanocomposites of 5PCH has reduced by 60% compared to pure 5PCH. We have observed faster switching time in f-AgNPs nanocomposites compared to pure 5PCH due to the decrease of visco-elastic ratio. The total response time of 0.05 wt% f-AgNPs nanocomposites is reduced by 19% compared to pure 5PCH.
关键词： nematic LC,visco-elastic ratio,ion current,nanocomposite,Twisted nematic,response time
更新于2025-09-23 15:21:01
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Designing low power and high contrast ratio all-optical NOT logic gate for using in optical integrated circuits
摘要： In this paper, a new design of all-optical NOT logic gate is proposed. In this structure, a photonic crystal nano-resonator and three waveguides are used. The nano-resonator is formed by removing two dielectric rods. The contrast ratio for the proposed NOT logic gate is 20.75?dB. The maximum response time and the rate of sending information equal to 0.466?ps and 2.145?Tbit/s, respectively. In addition, very low power consumption, small size, and simple design are the main features of this logic gate. These features allow the designed structure to be used in all-optical switches. To accomplish this, two types of logic gates placement alongside each other in the optical integrated circuits are proposed and investigated. In both types, the logic gates are tested for single use and simultaneous use, and the accuracy of the performance and effect of each on the other is measured. The results clearly show that the two logic gates, along with each other, have acceptable perfor- mance and can easily be used in the optical integrated circuit.
关键词： Nano-resonator,Optical integrated circuit,All-optical NOT logic gate,Response time,Photonic crystal
更新于2025-09-23 15:21:01
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Oxygen partial pressure dependent UV photodetector performance of WO3 sputtered thin films
摘要： The influence of oxygen partial pressure (pO2) on the ultra-violet (UV) photodetector performance of WO3 thin films was studied. Here, the thickness of the WO3 thin films decreased from 225 nm to 150 nm with increasing the pO2 from 5% to 20%. The crystallinity of WO3 films decreased at higher pO2. The XPS analysis confirmed that the WO3 film deposited at 10% of pO2 had the more oxygen vacancies. The grain size of WO3 films decreased at higher pO2 grown conditions owing to the fragmentation of the oxide formation through the plasma. From current-voltage (I-V) measurements of WO3/Ti device, the ohmic-contact implies the formation of the metal-semiconductor junction with very less barrier height (?B) and it helps to the trapping of generated electrons for potential photodetector. Due to the higher number of incoming photons, the photocurrent was found to be increased as the power density increases. Finally, the WO3 film deposited at 10% of pO2 exhibits the higher photocurrent and quick rising time and hence this optimized thin film is suitable for UV-A photodetector.
关键词： Response time,WO3 film,Detectivity,Oxygen partial pressure,Photocurrent
更新于2025-09-19 17:13:59
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[IEEE 2019 IEEE PES Innovative Smart Grid Technologies Europe (ISGT-Europe) - Bucharest, Romania (2019.9.29-2019.10.2)] 2019 IEEE PES Innovative Smart Grid Technologies Europe (ISGT-Europe) - Experimental Research on the Response Time of Three-Phase Inverter on Grid Coupled to Photovoltaic Panels
摘要： The purpose of this paper is to study the response time of SMA Sunny Tripower 5.5 inverters. Material and method: The photovoltaic polycrystalline photovoltaic panels totaling 5000 W, which directly feeds an STP 500TL-20- 5.5kW Sunny Tripower grid inverter. Experimental research was conducted to test the possibility of using these inverters designed for solar systems coupled with wind turbines. As MPPT (maximum power point traking) inverters used for the above purpose, and delivering voltage to the national grid, they have an operating algorithm that allows them to adapt the impedance so that the group of photovoltaic panels delivers maximum power, indifferent to and the angle of incidence of the solar panels. The maximum voltage at which the panels work is 1000V, which allows the insertion of a large number of panels on the same string (virtually 1000/42 = 24 monocrystalline panels or 1000/37 = 27 polycrystalline panels). The algorithm mentioned above probes the power curve at various impedances, and then positions itself on the impedance at which the calculated power was the maximum. After a while, the process is resumed, since it is possible that the power received by the Sun panels has changed.The same algorithm is also respected by wind turbine inverters, with the observation that the sweep of the power curve and the positioning to the maximum value takes much less. This is necessary because the value of the wind speed is much faster than the sun. In addition, the safety of the turbine requires this, as it could lead to a wind turbulence. In conclusion, SMA Sunnny Tripower inverters are very slow in terms of loading and calculating the optimal operating point.
关键词： sampling rate,inverter,response time,on grid,data,photovoltaic pannel
更新于2025-09-16 10:30:52
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2D alloying molybdenum tin-disulfide monolayers with fast photoresponse
摘要： Elemental alloying in monolayer, two-dimensional (2D) transition metal dichalcogenides (TMDs) promises unprecedented ability to modulate their electronic structure leading to the unique optoelectronic properties. MoS2 monolayer based photodetectors typically exhibit a high photoresponsivity but suffer from a low response time. Here we develop a new approach for Sn alloying in MoS2 monolayers based on the synergy of the customized chemical vapor deposition (CVD) and the effects of common salt (NaCl) to produce high-quality and large-size Mo1-xSnxS2 (x<0.5) alloy monolayers. The composition difference results in different growth behaviors; Mo dominated alloys (x<0.5) exhibit uniform and large size (up to 100 μm) triangular monolayers, while Sn dominated alloys (x>0.5) present multilayer grains. The Mo1-xSnxS2 (x<0.5) based photodetectors and phototransistors exhibit a maximum responsitivity of 12 mA/W and a minimum response time of 20 ms, which is faster than most reported MoS2 based photodetectors. This work offers new perspectives for precision 2D alloy engineering to improve the optoelectronic performance of TMD-based photodetectors.
关键词： photodetector,Mo1-xSnxS2 monolayer,chemical vapor depostion,NaCl,response time
更新于2025-09-16 10:30:52
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Speed and sensitivity – Integration of electrokinetic preconcentration with a leaky waveguide biosensor
摘要： Improving the limit of detection by preconcentration and reducing the response time of optical biosensors are key requirements to enable their use in point of care (PoC) applications. To address these requirements, we have shown that integration of isoelectric focusing (IEF) at a pH step with a leaky waveguide (LW) sensor containing a non-speci?c a?nity ligand (reactive blue 4 dye (RB4)) can reduce the limit of detection of an exemplar protein (bovine serum albumin (BSA)) by a factor of 600–930 and reduce the response time to < 60 s. This is 6–9 times better preconcentration and up to 16 times faster response time than previous reports. IEF was performed with standard ampholytes and with simple acids and bases forming a pH step. Using ampholytes gave good preconcentration, but was much slower than using a pH step. The LW sensor used a thin agarose hydrogel layer into which RB4 was immobilized. The dye acted both as a non-speci?c a?nity ligand and to visualize the waveguide resonances. This allowed the refractive index of the waveguide to be monitored in real time at any point along the 10 mm separation channel length.
关键词： Response time,Electrokinetic preconcentration,Limit of detection,Leaky waveguide,Point-of-care
更新于2025-09-16 10:30:52