Lighting Design Research Articles

Design and Fabrication of High Performance Visible Light Driven H2 Production of N-doped TiO2 Nanotubes Incorporated 2D MoS2 Nanosheets Heterojunction Photocatalyst

Design and Fabrication of High Performance Visible Light Driven H2 Production of N-doped TiO2 Nanotubes Incorporated 2D MoS2 Nanosheets Heterojunction Photocatalyst

LIGHTING DESIGN SCHEMES AND COLOURS IN DANCE PERFORMANCES: THE MAGICAL ILLUSION

Dance is a creative expression of movements, patterns, and stories they perform. The lighting design contributes to a complete theatrical experience for the audience by highlighting and framing every movement in each dance piece at the right moment. In solos and duets, lighting can emphasize this intimacy by using different spotlights in a particular area and it can make the rest of the stage dark. Different lighting fixtures will help by adding texture to the dance performances. The ambient lighting helps to set the scene, often shadow lighting, and backlighting produces striking images to elevate the body lines and also emphasize the shapes and angles. Few dance groups perform with the integrity of new technologies and Body.This article aims to attempt a definitive and comprehensive illustration of how light design plays an important role in contemporary performances. The lighting design as an art form within the theater is certainly a creative process that illuminates the performer's body to create a visual bonanza experienced by the spectator. In contemporary dance performances, it became an essential illustrative medium rather than decorative elements like in some traditional dance performances.Lighting design is a scenic art in contemporary dance performances concerned with atmosphere and 'body form' in relation to the performance space. The lighting design for a performance with a style and colour on a performer's body creates the magical illusion that is being experienced by the audience. Combinations of lighting design styles and body pigment are crucial and Indian contemporary dance groups adopted such technologies and make some interesting performances.This study analyzes how lighting design influences dance works as a creative approach to performance-making. Blending of costume, makeup, set, interactive media, and lighting design is an added advantage that we can observe in these Indian contemporary Performances. This paper analyzes how lighting design and dance are an integral part of a colorful performance.

Research on indoor light environment optimization of nursing home community based on artificial neural network

ABSTRACT China's ageing population is set to peak in 2040 and nursing homes are where most elderly people live. In order to improve the comfort of the elderly in residential homes, it is necessary to investigate a greener lighting solution. The greenness of a lighting scheme is reflected in the fact that it meets the two needs of economy and comfort. The design of indoor light will directly affect their quality of life, as well as their physiological and psychological changes, so the elderly have special needs for light. To address the problem of optimizing the indoor light environment in nursing home communities, this study proposes an artificial neural network algorithm-based prediction method for optimizing the indoor light environment, which in turn improves the comfort of indoor lighting for the elderly. The results show that the mean absolute error, mean square error and root mean square error are 0.49445, 0.49984 and 0.70699 respectively after using the artificial neural network algorithm for light control. after 217 training sessions, the method can meet the pre-set error rate of 10−2 and achieve the expected purpose. The R-values for the training, validation and test sets hovered around 0.9, indicating a good fit.

Cellulose acetate network via ion pre-anchored strategy for simultaneous regulation of uniform Mg2+ flux and ion conductivity

Hybrid LiMg batteries stand out by combining the rapid lithium diffusion kinetics and the advantages of magnesium. However, the uneven Mg deposits may result in continuous parasitic reactions and penetrate the separator. Herein, cellulose acetate (CA), with functional groups, was applied to engineer coordination with MOFs and construct the evenly-distributed and ample nucleation sites. Moreover, the hierarchical MOFs@CA network was fabricated via the metal ion pre-anchored strategy to regulate the uniform Mg2+ flux and improve ion-conductivity simultaneously. Furthermore, the hierarchical CA networks with well-ordered MOFs provided efficient MOF-to-MOF ion-transportation channels and served as ion sieves to inhibit anion transportation, thereby mitigating polarization. The super dendrite-inhibition and interfacial compatibility was confirmed and the assembled Mo6S8//Mg batteries exhibited high capacity about 105 mAh g−1 and capacity decay of 4 % after 600 cycles at 30 C, which surpassed the state-of-the-art LMBs system employing Mo6S8 electrode. The fabricated GPE sheds fresh strategy for the design of CA-based GPEs and bright light on the promise of high-performance LMBs.

Light as an artistic tool of designing the architectural and urban environment

The article examines light as a tool of architectural and lighting design and a mean of artistic expression, which creates new social messages and influences environmental objects and the architectural environment. Within the scope of the tool, techniques of artistic lighting are researched and formed, traditional and innovative lighting tools of emotional and figurative formation of the urban and architectural environment from the standpoint of artistic design are determined. Traditional means and devices are lenses, optics, developer, LED and craft lamps. Innovative means and equipment are projectors, lasers, video mapping, theatrical elements, musical accompaniment, interaction through websites and mobile devices, management of the cloud environment using system controls, copywriting based on social messages and senses. As a result of the study, light methods of artistic design were considered, specifically transformation, digital art, emotional disclosure, city landmark, keeper of history, optical metaphor, fusion with nature, and types of artistic lighting were formulated. The analysis of the examples also allowed us to determine specific types of artistic lighting and light artistic effects: functional, atmospheric, optical, media or digital, combinatorial type with shadow and caustic effects. For each type of lighting, unique techniques and means of environment organization are formulated for each of the three levels: urban, architectural and object-spatial. The usage of methods, techniques and tools is possible both combined and separately. Their harmonious implementation and usage form an emotional interactive lighting architectural and urban planning environment with its own atmosphere and rules of perception. Successful operation of certain methods and means within each of the formulated types of environment lighting could express emotionality and social messages. Their organic interaction is possible applying an artistic approach based on the combination of philosophy and social messages with aesthetics and modern technologies and that encourages social responsibility and self-organization.

Application of renewable energy decorative materials in modern architectural design under low-carbon concept

Abstract The construction industry is booming, but construction projects will consume much non-renewable energy and cause environmental pollution. In response to this problem, this article establishes a low-carbon architectural design model and discusses the application of renewable energy decorative materials in modern architectural design in detail. Previous studies have shown that renewable energy decorative materials are widely used in ventilation design, thermal insulation design, interior design and lighting design, and the weights of carbon emissions in the use stage are 20%, 46%, 29% and 33%, respectively. In 2021, the usage weights of renewable energy decorative materials in ventilation design, thermal insulation design, interior design and lighting design will be 70%, 72%, 80% and 70%, respectively, far exceeding the usage of traditional materials.

Current State and Prospects for Development of Head Lighting for Vehicles. Part 2. Advanced Designs for Vehicle Headlights

As it has been shown in part 1 of this paper, modern head lighting, due to objective design flaws, does not always meet the requirements of existing international standards, which means a decrease in road safety. To eliminate the previously Multibeam type. These types of headlights are currently either undergoing the stage of production tests or are used in extremely limited batches of vehicles in terms of the number of produced units. According with the results of this analysis, recommendations have been formulated for the design of advanced head lighting. The main of these recommendations is the use of single high-power LEDs with total internal reflection reflectors, which will provide a sharp cut-off border with efficient use of the source light flux. To increase the resistance of the headlight to temperature rise, it is proposed to use LEDs or other economical light sources together with phosphor parts. It is shown that adaptability is a useful but optional property of vehicle headlights, since it leads to complicate the design, and this is not always justified. The advantages of the headlight, created taking into account the above recommendations, are described, the main of which are the simplification of its design, reduction in weight and improvement of the thermal parameters of the product.

Real-time lighting design: a pioneer, a work, and a collaboration

ABSTRACT This article proposes three stories that exemplify different metaphors, mechanics, and practices of real-time lighting design. Starting with the example of cybernetician Gordon Pask’s Musicolour, the article proposes a cybernetic-based model of control that favors principles of human–machine co-operation. Then, the analysis of the collaboration between a lighting designer and a multimedia artist illustrates the need for and challenges of radical interdisciplinarity during the production of a stage performance. Finally, the description of a contemporary multimedia installation demonstrates the principles of an aesthetic of lighting grounded in machine-based behaviors. Through those three stories, this article aims to initiate a discussion on the hybridization of lighting with real-time computing, a process that significantly transforms the practice of artists and lighting designers but remains understudied.

FEATURES COMPUTER DESIGN IN LIGHTING TECHNOLOGY

Computer design in lighting engineering (or lighting design) is a new interdisciplinary area of professional activity that is in demand in the modern lighting market. A specialist in the field of lighting design, in addition to knowledge of lighting engineering and lighting devices, requires a high level of knowledge of information technology and software. Competencies in the field of computer design in lighting technology provide great opportunities in creative and professional activities, in particular, in the field of computeraided lighting design. When developing a lighting installation, it is mandatory to carry out lighting calculations by modeling the distribution of light in space. For this purpose, programs for scene visualization and lighting calculations are used. With the help of the developed model, the light distribution and location of lighting fixtures are determined, the processing and rendering of illuminated objects is carried out in 3D editors.

Sick building syndrome: The effects of animal and plant-based adhesive in wood furniture

Sick building syndrome (SBS) is a condition that afflicts occupants of a building, typically a workplace, and is linked to time spent in the building(Thach et al., 2019). The precise cause for SBS is still unknown. However, there are a few possibilities that is believed to be the cause of SBS such as poor ventilation, bad lighting design, presence of mold, fungus and formaldehydes which is usually found in wood furniture. This research paper focuses on the furniture factor of SBS. Certain material and finishes used in furniture production are harmful to the users as it has the potential to emit chemical substances from the wood composite products(Jeon et al., 2011) which could affect the indoor air quality. Furniture production may not sound harmful, but if the processes were observed in detail, we can see animal exploitations along the progress. Adhesives used to join the furniture may have substances that are derived from animals. The objective of this research is to study the chemical component in an animal-based adhesive and plant-based adhesive in wood furniture that is commonly used in lobby or lounge area (sofa, coffee table, etc.). With the chemical components identified, it is used to see how it contributes to the Sick Building Syndrome and which adhesives will be a better option for furniture production. This research also aims to compare animal-based and plant-based adhesives in terms of quality and cost. This research uses the qualitative method in which we look at past research first-hand observations, interviews, data, etc. The outcome by the end of this research will achieve all research objectives and suggest a better adhesive in wood furniture production whether it is animal-based or plant-based adhesives that has the least effect to SBS. This research can be beneficial to all furniture companies that are finding an alternative for a safer and greener choice of adhesive in wood furniture production. This research can also be a guideline to help improve the quality in furniture production and reduce the risk of SBS.

An Investigation of Light Spectrum and Intensity on Depression among Older Adults

The impact of lighting in buildings on managing behavioural and psychological symptoms, particularly in older adults, is significant as it affects visual and circadian systems. With age-related changes in eyes and circadian system, specialized lighting design is crucial to promote mood and overall well-being in older people. This study aimed to assess the effects of two types of ambient lighting interventions on depression in older adults. Both interventions involved creating a direct/indirect ambient illumination with high illuminance level (500 lux) in the morning (8:00-12:00), followed by gradual dimming throughout the day until reaching 100 lux in the evening (after 20:00). Depression levels were measured before, during, and after the lighting interventions using the Geriatric Depression Scale. The results showed a significant decrease in depression after exposure to both lighting conditions, with greater reduction observed in the L2 intervention. These findings highlight the positive effects of incorporating varying illumination and spectrum in the ambient lighting quality of residential buildings. Considering that older adults spend most of their time indoors, designing ambient lighting with varying intensity and tuning spectrum throughout the day could be a promising therapeutic approach to reduce depression, create an environment that promotes mental health, and improve the overall quality of life in older adults.

Harmonisation of the urban environment by means of visual art, lighting design, and architecture

Motives: This study was undertaken to fill in the gap in theoretical knowledge about the challenges associated with transformations in the modern urban environment, the socio-cultural consequences of external changes in the urban landscape, and growing interest in the urban environment as a unique locus of artistic and creative activity. Aim: The purpose of the study was to analyse modern methods of optimising the urban environment by means of visual art, lighting design, landscape architecture, and small architectural forms. Results: A harmonious urban environment was created in Kharkiv through the introduction of sophisticated design elements, art objects, and urban furniture in the architectural context. These elements were integrated to create distinct and high-quality urban recreation areas. Basic modelling principles for optimising the urban environment can be used to analyse and combine the existing methods, and search for new opportunities to implement creative design solutions.

Lightcurve inversion problem for objects with negative Gaussian curvature

In this paper we consider a second order nonlinear hyperbolic equation of Monge-Ampère type arizing in the Light Curve Inversion problem [7,8,4] when dealing with objects with regions with negative gaussian curvature. The above works imply that such regions are of practical importance in the Light Curve Inversion problem. It is shown here that in such regions existence and uniqueness of solutions to the original equation can be obtained by solving a system of four first order quasi-linear differential equations supplemented by suitable initial and boundary conditions. Furthermore, these solutions can be found by integrating a system of ordinary differential equations. The numerical methods in [14] can be applied to actually find these solutions. We present here the completed part of the overall project, which establishes the necessary basis for efficient numerical solution. It is expected that the part of the project dealing with numerics will be addressed in a separate paper. This paper is written in a form accessible to physicists, engineers and applied mathematicians working on the Light Curve Inversion problem and design of reflectors.

Evaluation of the enhancement of photosynthetic rate in a komatsuna (Brassica rapa L. var. perviridis) canopy with upward lighting using an optical simulation in a plant factory with artificial light.

In a plant factory with artificial light (PFAL), upward lighting is expected to prevent senescence and decrease in the photosynthetic capacity of the lower leaves in the canopy. Upward lighting may also increase the photosynthetic rate of a canopy by improving its photosynthetic photon flux density (PPFD) distribution. However, the net photosynthetic rate (Pn) of leaves is lower when the abaxial surface is irradiated than that when the adaxial surface is irradiated. The aim of this study was to estimate the PPFD in a PFAL and the Pn of plants using three-dimensional plant models and optical simulation. First, we measured the Pn of komatsuna (Brassica rapa L. var. perviridis) leaves under different conditions of the proportion (pad ) of PPFD on the adaxial surface to total PPFD on both surfaces and developed an equation for the light response curve of photosynthesis considering pad . When PPFD was low, except when it was 30 and 70 µmol m-2 s-1, Pn increased as pad increased, because the absorptance also increased with pad . Under high PPFD conditions, Pn was maximized at 67-83% of pad because the light would be distributed more efficiently for photosynthesis. Next, using optical simulation and the developed equation, we estimated the photosynthetic rate of a komatsuna canopy (CPn) under downward and upward lighting. The CPn increased by 1.08-1.13 times by combining downward and upward lighting due to the increase in the photosynthetic photon flux (PPF) of light incident on the canopy and the decrease in the spatial variation of PPFD on the leaves in the canopy. As the depreciation of lamps for upward lighting accounts for 7.5-9.0% of the production cost in a PFAL, even if the depreciation of lamps for upward lighting increased, enhancement of CPn by upward lighting would be cost-effective. We performed optical simulations under 220 conditions and evaluated them using CPn as an index. Moreover, we provided the proportion of PPF of upward lighting that improved CPn and discussed the reason for this improvement. The result shows that optical simulation is useful for evaluating the lighting design in a PFAL and analyzing the effects of the lighting design on the light environment and photosynthesis.

Commercial Lighting Design in Human-Centered Lighting Concept

In this study, the lighting design of a building in the Organized Industrial Zone, which was converted from a warehouse to a commercial kitchen, was designed according to the Human-Centered Lighting concept. Point lighting calculations were made for commercial kitchen environments with artificial lighting. In order to reduce the negative effects of lighting on human health, lighting that will not disrupt the circadian rhythm should be provided. By using direct lighting, without changing the architectural design, it has been tried to provide optimum lighting suitable for human biology with low-cost artificial lighting arrangements. According to WELL standards, an average of at least 500 lux conditions should be provided in the relevant work area on counters and other food preparation or production areas in Commercial Kitchen Lighting. This area, which was designed as a warehouse for this purpose, was designed as a commercial kitchen in terms of lighting. As a result of the design, a lighting design was made in accordance with the WELL standards according to the Human-Centered Lighting concept. In this way, the visual comfort of the working personnel is improved and optimum circadian effects are provided.

Spectral optimization of trichromatic white LEDs based on age of lighting user and application scene.

The optimization of trichromatic white light emitting diodes (LEDs) spectrum for application scenes related to the age of lighting users is proposed and demonstrated. Based on the spectral transmissivity of human eyes at different ages, the visual and non-visual responses of human eyes to different wavelengths of light, we have built the blue light hazards (BLH) and circadian action factor (CAF) related to the age of the lighting user. The BLH and CAF are used to evaluate the spectral combinations of high color rendering index (CRI) white LEDs obtained from different radiation flux ratios of red, green, and blue monochrome spectrum. The best spectra of white LEDs for lighting users at different ages in work and leisure scenes are achieved due to the optimization criterion of BLH proposed by us. This research provides a solution for intelligent health lighting design applicable to light users of different ages and application scenes.

Design of Rural Road Lighting System Based on Internet of Things and Deep Learning

With the promotion of China's new rural construction and beautiful countryside movements, there is a growing demand to improve the living environment of residents in rural areas and meet the requirements for energy efficiency and sustainability by implementing novel technologies. The internet of things (IOT) that allows real-time monitoring, measurement, and control while ensuring sustainability has become the trend in the field of lighting management. On the other hand, deep learning algorithms could help to eliminate the labor-intensive and time-consuming mining and feature extraction of high-dimensional complex data, and provide analysis and optimization of control strategies in a much shorter time. In this study, we put forward a new lighting design model by integrating IOT and deep learning, and theoretically analyzed its feasibility and discussed its advantages, with the goal to provide a new scheme for the design of rural road lighting system that is energy-efficient with improved reliability, robust functionality and satisfying performance.

Data-driven Digital Lighting Design for Residential Indoor Spaces

Conventionally, interior lighting design is technically complex yet challenging and requires professional knowledge and aesthetic disciplines of designers. This article presents a new digital lighting design framework for virtual interior scenes, which allows novice users to automatically obtain lighting layouts and interior rendering images with visually pleasing lighting effects. The proposed framework utilizes neural networks to retrieve and learn underlying design guidelines and the principles beneath the existing lighting designs, e.g., a newly constructed dataset of 6k 3D interior scenes from professional designers with dense annotations of lights. With a 3D furniture-populated indoor scene as the input, the framework takes two stages to perform lighting design: (1) lights are iteratively placed in the room; (2) the colors and intensities of the lights are optimized by an adversarial scheme, resulting in lighting designs with aesthetic lighting effects. Quantitative and qualitative experiments show that the proposed framework effectively learns the guidelines and principles and generates lighting designs that are preferred over the rule-based baseline and comparable to those of professional human designers.

Analysis of International Lighting Criteria and Lighting Design in Light-Sensitive Areas

Analysis of International Lighting Criteria and Lighting Design in Light-Sensitive Areas

Enhancement on Tb3+ luminescence in CaScBO4-based ceramic phosphors by Ce3+-induced resonance energy transfer and the generation of white light emission collaborated with Mn2+

A series of Tb3+-doped, Ce3+,Tb3+-co-doped and Ce3+,Tb3+,Mn2+-tri-doped CaScBO4 (CSB) ceramic phosphors were prepared by solid-state reaction. X-ray diffraction (XRD) was taken to confirm the phase purity of all as-prepared phosphors powder. Steady-state and transient-state fluorescence spectra were applied to evaluate the luminescence properties of the phosphors. The results indicated that significant enhancement on Tb3+ luminescence was successfully realized by the Ce3+-induced resonance energy transfer and confirmed that the energy transfer from Ce3+ to Tb3+ was governed by an electronic dipole-dipole interaction. Compared to the CSB:Tb3+ phosphors whose optimal excitation located at 378 nm, the occurrence of Ce3+-Tb3+ energy transfer not only allowed the optimal excitation to peak at around 390 nm but also gifted the CSB:Ce3+,Tb3+ phosphors color tunability from blue, cyan to green. Then, two different designs of white light by the introduction of Mn2+ luminescence were performed. One was the combination of CSB:Ce3+,Tb3+ and CSB:Ce3+,Mn2+ phosphors, based on the co-excitation of the above two phosphors at the same wavelength. Another was the direct use of the tri-doped CSB:Ce3+,Tb3+,Mn2+ phosphors. Both designs succeeded in the generation of white light emission. The performance of these two designs in real devices were also studied. The direct use of the tri-doped CSB:Ce3+,Tb3+,Mn2+ phosphor in white light-emitting diode (WLED) device can produce white light with a color rendering index (CRI) up to 85.3 while the use of the CSB:Ce3+,Tb3+ and CSB:Ce3+,Mn2+ phosphors combination can just produce a value of 76.6 in CRI.