Searched for: subject%3A%22lightness%22
(1 - 20 of 586)

Pages

document
Ammerlaan, Bas (author)
The project originated with the goal of creating an interactive light and sound installation for Highlight Delft, an innovative art and technology route. This involved incorporating holographic projection and spectral tuning to convey a specific perceptual phenomenon. The initial phase included extensive research into holographic projection,...
master thesis 2024
document
Wen, Minzhen (author), Ibrahim, Mesfin Seid (author), Meda, Abdulmelik Husen (author), Zhang, Kouchi (author), Fan, J. (author)
High-power white light-emitting diodes (LEDs) have demonstrated superior efficiency and reliability compared to traditional white light sources. However, ensuring maximum performance for a prolonged lifetime use presents a significant challenge for manufacturers and end users, especially in safety–critical applications. Thus, identifying...
journal article 2024
document
Rocchetta, Roberto (author), Zhan, Zhouzhao (author), van Driel, W.D. (author), Di Bucchianico, Alessandro (author)
Lifetime analyses are crucial for ensuring the durability of new Light-emitting Diodes (LEDs) and uncertainty quantification (UQ) is necessary to quantify a lack of usable failure and degradation data. This work presents a new framework for predicting the lifetime of LEDs in terms of lumen maintenance, effectively quantifying the natural...
journal article 2024
document
Liu, Minne (author), Li, Wenyu (author), Chen, Wei (author), Ibrahim, Mesfin S. (author), Xiong, Jingkang (author), Zhang, Kouchi (author), Fan, Jiajie (author)
During the operation of an LED array, its thermal and optical performances are always not equal to the superposition of the individual LED's characteristics because of a significant thermal coupling effect between the arrays. Based on this, this paper proposes an electrical–photo-thermal model, with considering both junction temperature and...
journal article 2024
document
Blom, T. (author), Jenkins, Andrew (author), van den Dobbelsteen, A.A.J.F. (author)
The urban energy transition requires innovative heating and cooling systems, as well as enhanced flexibility in electricity usage. This paper explores the theoretical potential for vertical farms to contribute to the energy transition by supplying residual heat to local district heat networks and flexible electricity usage. A stepped approach...
journal article 2024
document
Dupont, Samuel (author), Kastelik, Jean-Claude (author), Vanhamel, J. (author), Dekemper, Emmanuel (author)
Diffraction of optical waves by an acoustic grating is a well-known phenomenon that enables the design of very versatile devices useful in photonic systems. For example, Acousto-Optic Tuneable Filters (AOTFs) can be dynamically tuned by radio-frequency signals. Among possible material choice, tellurium dioxide crystal is often used for practical...
conference paper 2024
document
Guerra, Victor (author), Hamon, Benoit (author), Bataillou, Benoit (author), Inamdar, A.S. (author), van Driel, W.D. (author)
This paper introduces an ontology-based Digital Twin (DT) architecture for the lighting industry, integrating simulation models, data analytics, and visualization to represent luminaires. The ontology standardizes luminaire components, facilitating interoperability with design tools. The calculated ontology-level metrics suggest mid-level...
journal article 2024
document
Minderman, Björn (author)
In the last decades our usage of the Radio Frequency (RF) spectrum has intensified a lot due to the increasing number of mobile devices. The spectrum is getting crowded and new communication alternatives might become necessary in the future. One such alternative is Visible Light Communication (VLC),which uses the visible light spectrum instead...
master thesis 2023
document
Oza, Jimeet (author)
Atrial fibrillation is a cardiac arrhythmia resulting from abnormal electrical conduction and impulse formation within the atria. To address this condition, a minimally invasive procedure called cardiac ablation is performed. Real-time visual feedback during this procedure plays a critical role in determining its success.<br/><br/>Photoacoustic...
master thesis 2023
document
RAMACHANDRAN, NAAGARAJAN (author)
Pressurized liquid Tin finds application in the generation of Extreme Ultra-Violet light for semiconductor lithography. In order to improve the throughput of the lithography systems, tin must be pressurized to higher levels, and in turn, new pressurization methods are needed.<br/><br/>A phase change tin pump is an innovative system that...
master thesis 2023
document
Koç, Hümeyra (author)
Awe, the feeling of encountering something greater or more powerful, has been explored in design and the arts. However, the potential of creating awe through the interplay of light and textiles remains underexplored. While the possibilities are vast, the precise tuning of their respective qualities to elicit a sense of awe over time have yet to...
master thesis 2023
document
Muthaiyan Karthikeyen, Shriram (author)
Thin-film silicon photovoltaic (PV) technology has an enormous potential in the solar power market due to its light weight, flexibility and ease of integration. This enables it to have a wide range of applications like roof top and building integrated installations making it more sustainable. Some of the other key benefits of thin-film silicon...
master thesis 2023
document
Shanka Vasuki, Sathya (author)
This thesis aims to enhance the performance of solar cells, specifically those used by Solarge, through comprehensive research on optical characterization and texture fabrication.<br/>In the first part, the focus is on understanding and optimizing the optical properties of Solarge's polymer front sheet and encapsulant. Through meticulous...
master thesis 2023
document
Liu, Yu (author)
This report outlines the key challenges faced by customers when purchasing smart lighting products through different online presentations. With the user-centered approach and the report serves as an initial step in exploring the design aspects of online retailing pages for light products. By focusing on the user and light experience, this report...
master thesis 2023
document
Lut, Jasper-Jan (author)
Drones that perform complex autonomous movements require a perfect estimate of their current position. However, internal measurement unit (IMU) errors introduce drift in this estimate, leading to significant discrepancies between the predicted and actual location. Various solutions have been proposed to calibrate the IMU, including methods...
master thesis 2023
document
Alhamad, Alaa (author)
This project aims to transform an old vacant office former tax building in Leeuwarden into a healthy living community, enhancing the health and well-being of its residents. By creating a welcoming environment with green spaces and amenities, the project promotes physical and mental well-being, community engagement, and high quality of life. The...
master thesis 2023
document
Mandlik, Nishad (author)
This thesis presents Screen Antenna - A Visible Light Communication (VLC) system that integrates data transmission and reception, with the conventional pixel display capability of RGB LEDs. The system is constructed with off-the-shelf components and runs on the Arduino Due microcontroller. The hardware and software have been designed with the...
master thesis 2023
document
Kleine Punte, Karlijn (author)
The amount of elderly people in the Netherlands is increasing rapidly. In conjunction with the individualization of the population, this has led to a number of problems. There is a lack of suitable houses for the elderly, a lack of money and nursing staff in the health care sector and a high rate of loneliness among the population. New housing...
master thesis 2023
document
de Beer, Arne (author)
This paper presents a study focused on developing an efficient signal processing pipeline and identifying suitable machine learning models for real-time gesture recognition using a testbed consisting of an Arduino Nano 33 BLE and three OPT101 photodiodes. Our research aims to address the challenges of limited computational power whilst...
bachelor thesis 2023
document
Tong, Mathew (author)
According to the Oxford Learner’s Dictionaries, the notion of “space” can be read in several ways, of what is the five general understandings of it would be: outside earth’s atmosphere, empty area, period, freedom, and lastly, where things exist/move. With the speed, amount of information, and technology we are currently facing in the 21st...
master thesis 2023
Searched for: subject%3A%22lightness%22
(1 - 20 of 586)

Pages