scholarly journals The effects of natural light on measures of meat quality and adrenal responses to husbandry stressors in swine

1998 ◽  
Vol 78 (3) ◽  
pp. 293-300 ◽  
Author(s):  
Nigel J. Cook ◽  
John Chang ◽  
Robert Borg ◽  
Wayne Robertson ◽  
Allan L. Schaefer
Keyword(s):  
Meat Quality ◽  
Salivary Cortisol ◽  
Natural Light ◽  
Full Spectrum ◽  
Lighting Condition ◽  
Artificial Lighting ◽  
Natural Lighting ◽  
Lighting Conditions ◽  
Cortisol Levels ◽  
Major Factors

Two groups of pigs, born and housed under artificial and natural lighting, demonstrated increases in plasma and salivary cortisol levels at the time of weaning (day 24) and following handling and transport, indicating that these husbandry practices are stressful experiences for the animals. Piglets housed under natural light had a mean plasma cortisol response to weaning of 33.7%, compared with 47.9% for pigs in the artificial-lighting condition (P < 0.03). The relative percentage of eosinophils was reduced following weaning in both groups of pigs (P < 0.04). Salivary cortisol levels were significantly increased in response to handling and transport (P < 0.0001). Also, "basal" levels of salivary cortisol were lower in pigs exposed to natural lighting (P < 0.02) but no differences in the magnitude of the response to handling and transport were evident between different lighting conditions. Male pigs raised under artificial lighting had greater fat depth than those raised under natural light (P < 0.03) and a lower lean yield (P < 0.05). The longer photoperiod and full spectrum of natural light probably entrains the circadian rhythm of cortisol to an earlier clock time and are likely to be the major factors in differential cortisol concentrations between lighting conditions. Key words: Lighting, cortisol, saliva, pigs, stress, meat quality

Review of the Current State and Future Development in Standardizing Natural Lighting in Interiors

2018 ◽  
pp. 5-26 ◽  
Author(s):  
Stanislav Darula
Keyword(s):  
Human Life ◽  
Natural Light ◽  
Artificial Lighting ◽  
Computer Tools ◽  
Natural Lighting ◽  
Current State ◽  
Minimum Requirements ◽  
Life On Earth ◽  
Window Design

Three elements mainly wind, water and sun seemed to determine in ancient ages the basic phenomena of life on Earth. Architectural history documented the importance of sun influence on urban and building construction already in layouts of Mesopotamian and Greek houses. Not only sun radiation but especially daylight played a significant role in the creation of indoor environment. Later, in the 20th century, a search of interaction between human life in buildings and natural conditions were studied considering well­being and energy conscious design recently using computer tools in complex research and more detail interdisciplinary solutions. At the same time the restricted daytime availability of natural light was supplemented by more efficient and continually cheaper artificial lighting of interiors. There are two main approaches to standardize the design and evaluation of indoor visual environment. The first is based on the determination of the minimum requirements respecting human health and visibility needs in all activities while the second emphasizes the behaviour and comfort of occupants in buildings considering year­around natural changes of physical quantities like light, temperature, noise and energy consumption. The new current standardization basis for daylight evaluation and window design criteria stimulate the study of methodology principles that historically were based on the overcast type of sky luminance pattern avoiding yearly availability of sky illuminance levels. New trends to base the daylight standardization on yearly or long­term availability of daylight are using the averages or median sky illuminance levels to characterise local climatological conditions. This paper offers the review and discussion about the principles of the natural light standardization with a short introduction to the history and current state, with a trial to focus on the possible development of lighting engineering and its standards in future.

scholarly journals Effect of Indoors Artificial Lighting Conditions on Computer-Based Learning Performance

2020 ◽  
Vol 17 (7) ◽  
pp. 2537
Author(s):  
Rui Zhang ◽  
Yalong Yang ◽  
Qiansheng Fang ◽  
Yufu Liu ◽  
Xulai Zhu ◽  
...  
Keyword(s):  
Human Performance ◽  
Learning Performance ◽  
Performance Measurements ◽  
Lighting Condition ◽  
Artificial Lighting ◽  
Computer Based Learning ◽  
Lighting Conditions ◽  
High Illumination ◽  
Key Factor ◽  
Computer Based

Lighting condition is essential to human performance. With the widespread use of computer-based learning, the performance measurements become difficult, and the effects of artificial lighting conditions towards the new learning forms are not investigated extensively. The current study conducts a subject-within experiment with a 45-min-long online learning along with electroencephalogram (EEG)-based measurements, and a post-interview under five lighting setups respectively (300 lx, 3000 K; 300 lx, 4000 K; 300 lx, 6500 K; 500 lx, 4000 K; 1000 lx, 4000 K). Attention is chosen as the key factor to represent the learning performance. The results show that the attention of people aged in the 20s is not affected by the experimental lighting conditions. The results also demonstrate that people in high illumination at 1000 lx are more inclined to sustain attention despite the discomfort and dissatisfaction. Taking the EEG-based attention measurements and post-interview answers into consideration, lighting conditions at 300 lx, 4000 K are the recommended set points for university architectures among the investigated conditions, providing a practical basis when adjusting the lighting standard for its advantage in energy saving.

KAJIAN KARAKTERISTIK PENCAHAYAAN BUATAN PADA BIOSKOP (STUDI KASUS : CINEMACITRA XXI,MALL CIPUTRA,KOTA SEMARANG)

MODUL ◽  
2018 ◽  
Vol 17 (2) ◽  
pp. 75
Author(s):  
Nadiah Khamairah ◽  
Sri Hartuti Wahyuningrum
Keyword(s):  
Light Source ◽  
Architectural Design ◽  
Natural Light ◽  
Health Safety ◽  
Artificial Lighting ◽  
Natural Lighting

Architecture is a science that covers many areas of other scientific aspects. One aspect considered in architectural design is building utilities. Building utilities are the completeness of building facilities aimed at achieving the elements of comfort, health, safety, ease of communication and mobility in the building so that sustainability activity in the building can run with the best. One of the main aspects of building utilities is lighting. Lighting is divided into natural lighting and artificial lighting. Artificial Lighting is the lighting produced by a light source other than  natural light. Artificial lighting is necessary if the position of the room is difficult to achieve by natural lighting or when natural lighting is insufficient. This paper will be studied artificial lighting characteristic in cinema Citra XXI Semarang.is a space in certain locations which being owned by some societies and being use together with other societies in needs.

Building Information Modeling with Static and Dynamic Daylight Analysis

2013 ◽  
Vol 855 ◽  
pp. 255-258 ◽  
Author(s):  
Martin Jamnický
Keyword(s):  
Fossil Fuels ◽  
Building Information Modeling ◽  
Information Modeling ◽  
Internal Space ◽  
Poor Control ◽  
Artificial Lighting ◽  
Natural Lighting ◽  
Building Information ◽  
Major Factors

One of the major factors in verifying the way in which internal environments and buildings are qualified by people is daylight. The role of daylight in day to day basis and the fact of providing internal space quality make it that important. This is one of the reasons behind the constant need to integrate daylight into architecture, apart from high cost of fossil fuels or temporary electricity sources. Besides being one of the most efficient sources of energy, not to mention the fact that its completely free, there are other important aspects that should not be overlooked before entering the building. Generally, it is considered a pleasure to have daylight inside the building unless it distracts the occupants from accomplishing their daily tasks such as glare from computer screens as this can reduce productivity of offices and creates eye strain. Replacing artificial lighting with natural daylighting can be the best solution in terms of carbon footprint reduction and cutting costs to a minimum. It is essential to make sure that improper natural lighting or poor control doesnt give overheating or glare discomfort.

scholarly journals Artificial nighttime lighting impacts visual ecology links between flowers, pollinators and predators

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Emmanuelle S. Briolat ◽  
Kevin J. Gaston ◽  
Jonathan Bennie ◽  
Emma J. Rosenfeld ◽  
Jolyon Troscianko
Keyword(s):  
Interspecific Interactions ◽  
Visual Ecology ◽  
Light Sources ◽  
Artificial Lighting ◽  
Natural Lighting ◽  
Avian Predators ◽  
Lighting Conditions ◽  
Environmentally Sensitive Areas ◽  
Sexual Signalling ◽  
Environmentally Sensitive

AbstractThe nighttime environment is being altered rapidly over large areas worldwide through introduction of artificial lighting, from streetlights and other sources. This is predicted to impact the visual ecology of many organisms, affecting both their intra- and interspecific interactions. Here, we show the effects of different artificial light sources on multiple aspects of hawkmoth visual ecology, including their perception of floral signals for pollination, the potential for intraspecific sexual signalling, and the effectiveness of their visual defences against avian predators. Light sources fall into three broad categories: some that prevent use of chromatic signals for these behaviours, others that more closely mimic natural lighting conditions, and, finally, types whose effects vary with light intensity and signal colour. We find that Phosphor Converted (PC) amber LED lighting – often suggested to be less harmful to nocturnal insects – falls into this third disruptive group, with unpredictable consequences for insect visual ecology depending on distance from the light source and the colour of the objects viewed. The diversity of impacts of artificial lighting on hawkmoth visual ecology alone argues for a nuanced approach to outdoor lighting in environmentally sensitive areas, employing intensities and spectra designed to limit those effects of most significant concern.

scholarly journals Analysis on Energy-saving Lighting Design of the Underground Construction

2012 ◽  
Vol 1 ◽  
pp. 1 ◽  
Author(s):  
Fang Du ◽  
Yong Li ◽  
Feng Wu
Keyword(s):  
Energy Saving ◽  
Architectural Design ◽  
Indoor Environment ◽  
Lighting Design ◽  
Conduction System ◽  
Natural Light ◽  
Underground Space ◽  
Underground Construction ◽  
Artificial Lighting ◽  
Natural Lighting

There are often no windows and lack of natural light in the most of underground space, so lighting design is the most basic for most underground architectural design. Natural lighting is not only for comfortable indoor energy-saving and healthy light environment, but also for the good indoor environment. We need to use natural light and artificial lighting conduction system to offset the lack of natural light and improve the effect of underground space of natural light.

scholarly journals Exploratory Factor Analysis of Lighting As Preferable Physical Environment Attribute

2019 ◽  
Vol 8 (11) ◽  
pp. 1413-1416
Keyword(s):  
Factor Analysis ◽  
Exploratory Factor Analysis ◽  
Physical Environment ◽  
Hierarchical Cluster ◽  
Coffee Shop ◽  
Lighting Condition ◽  
Artificial Lighting ◽  
Natural Lighting ◽  
Lighting Energy ◽  
Main Components

A great design is something that satisfied both client need and desire, whilst it is a challenge of innovation is to go beyond aesthetics. Literature reviews have developed several survey regarded to interpret the ideal images of the attraction factor from the prospective customer where the prospective and retrospectives approaches happened. A coffee shop is a cultural trend where the function is not only a drinking place. The issue of short sustain in coffee shop service while the current mushrooming of the coffee shop business everywhere lead to understanding the factor of customers preference in selecting a coffee shop. This paper aims to determine component of lighting as preferable physical environment using exploratory factor analysis in SPSS. The constructs of lighting comprised of comfortable lighting, enough lighting, bright lighting, natural lighting, energy saving lighting, candle lighting and colorful lighting. The components of the attributes were identifies after the Exploratory Factor Analysis (EFA) using Principle Component Analysis (PCA) and Hierarchical Cluster analysis from 188 prospective customers consisted of 38.3% male respondents and 61.7% female respondents, resulted two main components extracted namely natural lighting and artificial lighting. The distinct factors determine the preferable lighting attributes by the prospective customers towards the natural lighting compared to artificial lighting. The opening therefore must put as design priority for a coffee shop to allow natural penetration of lighting to the interior. The selection of material and building components also can be part of the consideration in allowing the access of natural lighting with minimal artificial lighting used. The result potentially applied in architecture, service design and innovation industry to produce preferable lighting condition by the client.

scholarly journals The Architectural Analysis of the Illuminance Level in the Workspace, Using Natural and Artificial Lighting in Graha Pena Building in Makassar, Indonesia

2021 ◽  
Vol 21 (1) ◽  
pp. 1-12
Author(s):  
Nurul Jamala ◽  
Ramli Rahim ◽  
Sharyzee Mohamad Shukri
Keyword(s):  
Energy Efficient ◽  
Descriptive Analysis ◽  
Building Design ◽  
Building Envelope ◽  
Natural Light ◽  
Architectural Analysis ◽  
Artificial Lighting ◽  
Natural Lighting ◽  
Work Area ◽  
Lighting Systems

Energy-efficient building design models are one of the factors that need to be considered in building planning. In the morning to evening, sunlight as a source of natural light can be used as a source of lighting in buildings. By utilizing natural light, it will reduce energy consumption in buildings. Air conditioning and lighting are important factors in designing energy efficient buildings. In this study, analyzing natural and artificial lighting at Graha Pena Makassar Building. The research method is quantitative by measuring and analyzing several workspaces that are directly and indirectly related to openings in the building envelope. statistical descriptive analysis, namely entering data into tables and graphs, then analyzing the level of illumination in the analyzed workspace. The research objective was to determine the level of illuminance in several workspaces with different orientations. How is the effect of natural light distribution on building orientation and how is the artificial lighting system at workspace in the Graha Pena Makassar. The results showed that the orientation of the building had an effect on the distribution of natural light into the space. The spatial orientation facing East has a higher distribution of natural light than that of the south. Workspaces that are not directly related to window openings in the building envelope are using artificial lighting systems in the form of lights. The workspace has uneven illumination levels in its work area, because the layout and placement of lighting points have not been well planned. The contribution of this research is a reference in designing a building facade design with an attractive appearance, and can maximize the use of solar energy as a source of natural lighting, while still paying attention to the visual comfort of space users.

Influence of Transparent Partitions on Selected Energy Indicators of the Building Located in Central Europe

2014 ◽  
Vol 1020 ◽  
pp. 579-584
Author(s):  
Adam Ujma ◽  
Anna Lis
Keyword(s):  
Central Europe ◽  
Electric Energy ◽  
Natural Light ◽  
Interior Space ◽  
Natural Illumination ◽  
Artificial Lighting ◽  
Natural Lighting ◽  
Energy Indicators

The article discusses basic regulations and demands for windows and natural lighting. It presents results of analysis of lighting of the chosen interior space taking into consideration periods of exploitation of the artificial and natural illumination. The employment of glass of different light permeability were taken into consideration. Results of calculations were used for evaluating time of electric energy needed for artificial lighting in analyzed variants of natural light systems.

scholarly journals Analysis on Energy-saving Lighting Design of the Underground Construction

2012 ◽  
Vol 1 (1) ◽  
pp. 1
Author(s):  
Fang Du ◽  
Yong Li ◽  
Feng Wu
Keyword(s):  
Energy Saving ◽  
Architectural Design ◽  
Indoor Environment ◽  
Lighting Design ◽  
Conduction System ◽  
Natural Light ◽  
Underground Space ◽  
Underground Construction ◽  
Artificial Lighting ◽  
Natural Lighting

There are often no windows and lack of natural light in the most of underground space, so lighting design is the most basic for most underground architectural design. Natural lighting is not only for comfortable indoor energy-saving and healthy light environment, but also for the good indoor environment. We need to use natural light and artificial lighting conduction system to offset the lack of natural light and improve the effect of underground space of natural light.

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