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Publications related to LED (10,000)
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Article
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Increase in population has resulted in depletion of natural resources. Due to variation in climatic condition and environmental pollution, there is a need for alternative construction techniques, which will ensure the protection of natural resources and will result in energy efficient and eco-friendly building materials. Light transmitting concrete...
Article
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This article reports a highly integrated watch for noninvasive continual blood glucose monitoring. The watch employs a Nafion-coated flexible electrochemical sensor patch fixed on the watchband to obtain interstitial fluid (ISF) transdermally at the wrist. This reverse iontophoresis-based extraction method eliminates the pain and inconvenience that...
Article
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Aqueous zinc metal batteries are noted for their cost-effectiveness, safety and environmental friendliness. However, the water-induced notorious issues such as continuous electrolyte decomposition and uneven Zn electrochemical deposition remarkably restrict the development of the long-life zinc metal batteries. In this study, zwitterionic sulfobeta...
Article
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Highlights Ti 3 C 2 T x MXene-based coaxial zinc-ion hybrid fiber supercapacitors (FSCs) were fabricated with braided structure, which can be prepared continuously and present excellent flexibility and ultrastability. A sports watch driven by the watch belts which weaved uses the obtained zinc-ion hybrid FSC and LED arrays lighted by the FSCs under...
Article
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This paper elucidates the increased luminescence efficiency of CsPbBr 2.1 Cl 0.9 sky-blue perovskite light-emitting diodes (PeLEDs) achieved through the interface modification of 3,4 ethylenedioxythiophene (PEDOT):polystyrene sulfonic acid (PSS)/quasi-two-dimensional (QTD) perovskite using CsCl and CsBr materials, respectively. QTD films were fabri...
Article
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Objective Streptococcus mutans is one of the principal causative agents of dental caries (tooth decay) found in the oral cavity. Therefore, this study investigates whether selenium nanoparticles (SeNPs) enhance the efficacy of photodynamic therapy (PDT) against both planktonic communities and the one-day-old biofilm of S. mutans . In this study, th...
Article
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Background The aim of this study was to evaluate the influence of increased irradiation distance on the flexural strength (FS), dentin micro-shear bond strength (μSBS), and the degree of conversion (DC) of bulk-fill flowable, conventional flowable, and packable resin composites. Methods The resin composites tested were Surefil® SDR™ (SDR), Filtek...
Article
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This work describes the effect of a rubidium chloride (RbCl) interlayer in CsPbBr 3 perovskite light-emitting diode (LED) structures. RbCl crystallites exhibited polyhedral structures and lattice parameters similar to those of CsPbBr 3 perovskite crystallites. The lattice mismatch between the RbCl interlayer and CsPbBr 3 active layer was only appro...
Article
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We report the van der Waals integration of micropatterned GaN light-emitting diodes (LEDs) onto foreign graphene films. GaN micro-LEDs were selectively grown on a graphene substrate using a patterned SiO2 mask, and then the whole device structure was laterally fixed by a polyimide insulator to form a united layer. After device fabrication, the LED/...
Article
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Background Productivities of bioactive compounds in high-value herbs and medicinal plants are often compromised by uncontrollable environmental parameters. Recent advances in the development of plant factories with artificial lighting (PFAL) have led to improved qualitative and/or quantitative production of bioactive compounds in several medicinal...
Article
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Wireless technologies can be used to track and observe freely moving animals. InGaN/GaN light-emitting diodes (LEDs) allow for underwater optical wireless communication due to the small water attenuation in the blue-green spectrum region. GaN-based quantum well diodes can also harvest and detect light. Here, we report a monolithic GaN optoelectroni...
Article
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Nano-objects, such as quantum dots (QDs), are essential units for the construction of functional materials and devices in current technologies. The establishment of a versatile scheme to sort desired components from a crude product is crucial for bringing out the full potential of the original materials. However, it is still challenging to separate...
Article
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Red and blue light-emitting diodes (LEDs) are widely used as light sources in plant factories. Plants grown under red and blue light only produces purplish-gray light environment where plant leaves look purplish-gray. Under that light condition, it makes difficulty to check health status of plants specially insect and disease infected leaves by hum...
Article
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Fruit set is a crucial plant developmental process, determining yield in many crops. Pepper (Capsicum annuum L.) is a crop with poor fruit set as typically about two-thirds of all flowers abort. A higher light integral improves fruit set. However, the role of light spectrum has hardly been investigated. Opportunities for detailed investigation of l...
Conference Paper
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Optical camera communication (OCC) enabled by LED and embedded cameras has attracted extensive attention, thanks to its rich spectrum availability and ready deployability. However, the close interactions between OCC and the indoor spaces have created two major challenges. On one hand, the stripe pattern incurred by OCC may greatly damage the accura...
Article
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The use of artificial light to supplement natural light is essential for successful greenhouse winter production in regions with low natural sunlight to meet the increasing consumer demand for fresh vegetables. Traditionally, high-pressure sodium lights have been used. However, light-emitting diodes (LEDs) are receiving substantial interests as the...
Article
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In purple-fruited Capsicum genotypes, fruit anthocyanin content first increases, and later decreases upon ripening. In this study, the response of this transient anthocyanin accumulation as a function of light intensity and light spectrum was investigated. Harvested fruit at the mature purple stage were illuminated by white-red LED lights at a phot...
Article
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Multiple-input-multiple-output (MIMO) optical wireless communication systems are potential candidates for high-speed data transmission in indoor environments. In this work, we present an experimental evaluation of two different MIMO systems, i.e., conventional-MIMO (c-MIMO) and imaging-MIMO (i-MIMO) in terms of design considerations. Both systems u...
Article
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Bismuth oxyiodide (BiOI) films were prepared through the Layer-by-Layer (LbL) method for the first time using powdery BiOI microstructures previously synthesized by a solvothermal method. BiOI films and powdery samples were characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, energy-dispersive X-ray sp...
Article
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Photosynthesis is a process that plants need. Plant growth requires sunlight to carry out photosynthesis. At night photosynthesis cannot be carried out by plants. This research proposes an internet of things (IoT) model that can work intelligently to maximize photosynthesis and plant growth using fuzzy logic. The plants used in this research are mu...
Presentation
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U prezentaciji je prikazana praktična realizacija energetskog pretvarača koji se koristi kao preregulator sa korekcijom faktora snage u sklopu integrisanog napajanja ulične LED svetiljke. • Realizovani preregulator obezbeđuje pojedinačnu kompenzaciju reaktivne snage konkretne LED svetiljke (LED reflektora). • Ovo naročito ima smisla kada se u siste...
Article
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The key part of creating bone material for teaching is degreasing and whitening it. However, the substances used are often dangerous and toxic. We tested and compared safer methods based on two physical variables. These are light and heat. The material for our study was 45 femurs from 23 adult domestic dogs (Canis lupus f. familiaris). The bones we...
Conference Paper
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U radu je prikazana praktična realizacija energetskog pretvarača koji se koristi kao preregulator sa korekcijom faktora snage u sklopu integrisanog napajanja ulične LED rasvete. Realizovani preregulator u suštini obezbeđuje pojedinačnu kompenzacije reaktivne snage konkretne LED svetiljke (LED reflektora). Ovo naročito ima smisla kada se u sistemu k...
Conference Paper
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Human-robot collaboration (HRC) aims to increase efficiency and flexibility in production sites. The implementation in factories is, however, accompanied by risks of physical contact with robots and resulting injuries in case of system failures or workers' misconduct. One assumed reason for such safety-critical behaviour is over-trust in systems' c...
Article
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The correlation between molecular structure and photovoltaic performance is lagging for constructing high-performance indoor organic photovoltaic (IOPV) cells. Herein, this relationship is investigated in depth by employing two medium bandgap non-fullerene acceptors (NFAs). The newly synthesized NFA of FTCC-Br exhibits a similar optical gap and mol...
Thesis
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Because of the emerging demand for ultra-high pixel per inch (PPI) display which will play a key role in augmented reality (AR) / virtual reality (VR) applications, called near-eye display, III−nitride based micro-light emitting diodes (µLEDs) that can realize small pixel are attracting strong attention. For the fabrication of µLEDs arrays, top-dow...
Article
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Resin-based composites (RBCs) have transformed restorative dentistry and its procedures. However, the characteristics of RBCs have been modified over the years to enhance the physical and chemical properties of the materials. This context raises the need for studies that evaluate whether the properties of the RBCs that are commercially available ar...
Article
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The water-energy co-generation technologies are urgent to exploit their ability to address the challenges and opportunities for the water-energy nexus. This report presents a cuboid-shaped interfacial solar steam generator made of selective solar absorber-coated aluminum sheet with filter paper strips attached to its four outer walls as the evapora...
Chapter
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Gallium nitride (GaN)-based solid state lighting technology has revolutionized the semiconductor industry. The GaN technology has played a crucial role in reducing world energy demand as well as reducing the carbon footprint. As per the reports, the global demand for lighting has reduced around 13% of total energy consumption in 2018. The Departmen...
Conference Paper
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علارغم پیشرفت علم پزشکی در شاخه های مختلف، اما پژوهش های اخیر حاکی از آن است که متاسفانه بیماری صرع همچنان یکی از رایج ترین بیماری های سیستم عصبی می باشد. طبق بررسی های صورت گرفته علت اصلی این بیماری مزمن، تخلیه الکتریکی غیرطبیعی در گروهی از نرون‌های مغزی است که باعث بروز تشنج‌های مکرّر می‌شود. نکته ی قابل تامل و خطرناکی که وجود دارد این هست که این...
Article
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Wearable electronics have showed their profound impact in military, sports, medical and other fields, but their large-scale applications are still limited due to high manufacturing costs. As an advanced micro-fabrication process, laser processing technology has the advantages of high speed, high flexibility, strong controllability, environmental pr...
Article
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The development of functional protein production systems using transgenic plants as hosts has been rapidly progressing in recent years. Lettuce (Lactuca sativa L.) has been studied as one such host, and it has been reported that the biomass of lettuce per area and target protein expression level can be increased by optimizing the cultivation condit...
Article
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Carbon dots (C-dots) have been known as a type of important luminescent materials in the lighting field due to their advantages such as low cost, environmental benign, and broad color-tuning range. However, the C-dots often face the aggregation-induced photoluminescence quenching (AIPLQ) and film-formation instability problems, thereby causing the...
Article
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In this study, the effects of different light conditions on the growth of pepper seedlings and the development of these pepper seedlings after transplanting were explored. Based on the control light, pepper seedlings were grown under radiation with different proportions of added blue, UV-A, and far-red light for 18 days. Compared with the control,...
Article
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Highbush blueberry (Vaccinium corymbosum L.), originally a forest plant, is currently in need of improvement of clonal micropropagation technologies. It is known that the large percentage of propagated plants can be lost or damaged, not only at the stage of acclimatization to non-sterile conditions, but also during the growing completion stage. In...
Article
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Fiber-shaped supercapacitors are promising and attractive candidates as energy storage devices for flexible and wearable electric products. However, their low energy density (because their microstructure lacks homogeneity and they have few electroactive sites) restricts their development and application. In this study, well-distributed polyaniline/...
Article
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In this paper, we propose a smartphone-based biosensor for detecting human total hemoglobin concentration in vivo with high accuracy. Compared to the existing biosensors used to measure hemoglobin concentration, the smartphone-based sensor utilizes the camera, memory, and computing power of the phone. Thus, the cost is largely reduced. Compared to...
Article
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Carbon dots (CDs), as a new type of photoluminescent nanomaterial, have attracted extensive attention in various fields because of their unique luminescence properties. However, CDs will exhibit fluorescence quenching in the solid state or aggregate state, which limits their application. In this paper, a unique strategy is proposed to regulate solu...
Article
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Smart lighting systems utilize advanced data, control, and communication technologies and allow users to control lights in new ways. However, achieving user comfort, which should be the focus of smart lighting research, is challenging. One cause is the passive infrared (PIR) sensor that inaccurately detects human presence to control artificial ligh...
Article
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In this study, we have observed the voltage and current of potato extract which are found and grown easily. We have conducted observations very carefully. We have found that the potato extract of these samples have significant amount of voltage and current. The discharge characteristic of a LED lamp was more effective than the other types of lamp a...
Article
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This study aims to analyze the existing market status of lighting technologies in Pakistan, the existing policy and regulatory framework, and the key driving factors which have led to the market growth of LED technology in both rural and urban areas. The results obtained from an extensive survey backed by the literature on the policy landscape of e...
Preprint
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The low-pass characteristics of front-end elements including light-emitting diodes (LEDs) and photodiodes (PDs) limit the transmission data rate of visible light communication (VLC) and Light Fidelity (LiFi) systems. Using multiplexing transmission techniques, such as spatial multiplexing (SMX) and wavelength division multiplexing (WDM), is a solut...
Article
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Recent developments in wireless digital communication have made Visible Light Communication (VLC) a promising technology. Comparatively speaking, the VLC system used in this task offers better performance and efficiency. In this study, a modified Optical Orthogonal Frequency Division Multiplexing (indoor VLC communication model) was proposed. To ov...
Article
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Forsythia saxatilis is an endangered species endemic to Korea. Here, we determined the effects of light quality on the growth and antioxidant activity of F. saxatilis. Six different light conditions were used: white (W10, control); combined light-emitting diodes (LED) of white (W) and far-red (Fr) at 10:1 (W10Fr1); combined LED of red (R) and blue...
Conference Paper
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The rising population, developing technology, growing industry, urbanization, and improvement of living standards all over the world are related to the increase in household waste being hard to recycle, and resulting in concerns about the management of waste. Considering limited natural resources and seeking new ways to utilize energy more efficien...
Preprint
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In this paper we report on our submission to the Multidocument Summarisation for Literature Review (MSLR) shared task. Specifically, we adapt PRIMERA (Xiao et al., 2022) to the biomedical domain by placing global attention on important biomedical entities in several ways. We analyse the outputs of the 23 resulting models, and report patterns in the...
Article
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A single independent voltage source (Vin or Vbat) is used to regulate the speed of an E-vehicle (EV) with the same interval of switching pulses to generate different voltage ratios by charging/discharging the flying capacitors using a novel single-input multi-output (SIMO) DC-DC switched capacitor converter. In this work, various speed transmission...
Preprint
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This study aims to develop a novel streetlight management system powered by computer vision technology mounted with the close circuit television (CCTV) camera that allows the light emitting diode (LED) streetlight to automatically light up with proper brightness by recognizing the presence of pedestrians or vehicles and reversely dimming the street...
Article
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In this paper, two algorithms (a preliminary and enhanced algorithm) to detect electronic symbols in document images are proposed. Morphological operations coupled with Hough transform are used in the proposed methodology. The objective of the proposed algorithms is to detect electronic symbols of open and closed shapes. The methods can successfull...
Article
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Citronella mucronata (C. mucronata), a tree species endemic to Chile, has become threatened in its natural habitat and is currently listed as vulnerable. Tree population parameters have deteriorated due to indiscriminate logging and other anthropogenic activities, warranting research on mass propagation as a means of recovery. This study, unprecede...
Article
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As an important detection tool in biochemistry, fluorescence detection has wide applications. Quantitative detection can be achieved by detecting fluorescence signals excited by excitation light at a specific wavelength range. Therefore, the key to fluorescence detection is the stable control of the excitation light and the accurate acquisition of...
Article
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The trend of high data rates in indoor environments has increased the demand for visible light communication (VLC). This paper investigates the performance of PAPR with dynamic range (DR) of LED in the existing system models of optical OFDM for indoor communication environments based on complimentary cumulative distribution function (CCDF). Four co...
Article
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This study examined the effects of exposure to coloured LED lights on some behavioural responses, food and water consumption, and live weight in budgerigars kept in captivity using behavioural tests to compare different lighting conditions. Budgerigars’ feeding, comfort, social, fear, and resting behaviours and behavioural reactions to a new enviro...