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Author Hadi, K.; DuBose, J.R.; Ryherd, E.
Title Lighting and Nurses at Medical-Surgical Units: Impact of Lighting Conditions on Nurses' Performance and Satisfaction Type Journal Article
Year 2015 Publication Herd Abbreviated Journal Herd
Volume (up) 9 Issue 3 Pages 17-30
Keywords psychology; lighting
Abstract OBJECTIVE: This study investigates the perception of nurses about their lighting environment at medical-surgical hospital units in order to understand areas of improvement for lighting at these units. BACKGROUND: The bulk of the research about nurses and lighting is focused on nighttime nursing, exploring the disruptions of nurses' circadian rhythm and maintaining alertness. The understanding of nurses' perception about lighting and its impact on nurses' task performance and patient examination remains imprecise. METHODS: This study used an online survey to ask a set of questions about lighting in medical-surgical units at five key locations including centralized nurse stations, decentralized nurse stations (DCNS), patient bedsides, patient bathrooms, and corridors from 393 survey participants. It then explored the survey findings in more depth through conducting focus groups with eight volunteer nurses. RESULTS: Lighting conditions at patient besides and DCNSs were significantly less desirable for nurses compared to other locations. A significant relationship between nurses' access to lighting controls (switches and dimmers) and satisfaction about the lighting environment was found. No significant relationship was observed between the individual characteristics of nurses (such as age, years of experience, etc.) and findings of this study. CONCLUSIONS: Thoughtful design of the lighting environment can improve nurses' satisfaction and perception about their working environment.
Address University of Nebraska-Lincoln, Omaha, NE, USA
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ISSN 1937-5867 ISBN Medium
Area Expedition Conference
Notes PMID:26370449 Approved no
Call Number LoNNe @ kyba @ Serial 1298
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Author Riad Saraiji, M. Saju Oommen
Title Light Pollution Index (LPI): An Integrated Approach to Study Light Pollution with Street Lighting and Façade Lighting Type Journal Article
Year 2012 Publication The Journal of the Illuminating Engineering Society Abbreviated Journal
Volume (up) 9 Issue 2 Pages 127-145
Keywords Planning; Lighting
Abstract Rather than being complementary, street lighting and façade lighting are typically designed independently of each other. As a result, light from street lighting luminaires might spill onto building façades and influence characteristics of the façade lighting including required light levels and color. Conversely, façade lighting might reflect onto the street and contribute to the street illumination. This manuscript presents an integrated approach to analyzing the interaction between the street and façade lighting in consideration of light pollution control. A generic street model with various calculation grids was studied. It was found that a moderately lit façade contributes to a horizontal illuminance of 5 lux or more on the street and a vertical illuminance of 4 lux or more 1.5 m above the sidewalk. An over-illuminated street may result when both street and façade lighting exist without reference to each other. The size of the light-pollution calculation grid and the use of a 3-D illuminance graph were studied. It was found that fluctuations in the calculated amount of light pollution could occur unless the size of the pollution calculation grid is large enough to capture all of the upward flux. A method of achieving the optimal size of the calculation grid is demonstrated. Shortcomings of using light pollution percentage as a light pollution index are highlighted and an alternative light pollution index is proposed.
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Notes Approved no
Call Number LoNNe @ kyba @ Serial 1764
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Author Lin, J.; Ding, X.; Hong, C.; Pang, Y.; Chen, L.; Liu, Q.; Zhang, X.; Xin, H.; Wang, X.
Title Several biological benefits of the low color temperature light-emitting diodes based normal indoor lighting source Type Journal Article
Year 2019 Publication Scientific Reports Abbreviated Journal Sci Rep
Volume (up) 9 Issue 1 Pages 7560
Keywords Human Health; Lighting
Abstract Currently, light pollution has become a nonnegligible issue in our daily life. Artificial light sources with high color temperature were deem to be the major pollution source, which could induce several adverse effects on human's health. In our previous research, we have firstly developed an artificial indoor light with low color temperature (1900 K). However, the biological effects of this artificial light on human's health are unclear. Here, four artificial lights (1900 K, 3000 K, 4000 K and 6600 K) were used to evaluate some biological changes in both human (in total 152 person-times) and murine models. Compared with other three high color temperature artificial lights, our lights (1900 K) presented a positive effect on promoting the secreting of melatonin and glutamate, protecting human's eyes, accelerating would healing and hair regeneration. These systematical studies indicated that the proposed low color temperature (1900 K) light could provide several significant benefits in human's daily life.
Address The National Engineering Research Center for Bioengineering Drugs and the Technologies, Institute of Translational Medicine, Nanchang University, Nanchang, Jiangxi, 330031, China. wangxiaolei@ncu.edu.cn
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Language English Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 2045-2322 ISBN Medium
Area Expedition Conference
Notes PMID:31101840 Approved no
Call Number GFZ @ kyba @ Serial 2501
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Author Bryant, J.M.; Hake, H.G.
Title A decision support system for assessment of street lighting tenders based on energy performance indicators and environmental criteria: Overview, methodology and case study Type Journal Article
Year 1911 Publication University of Illinois Bulletin Abbreviated Journal
Volume (up) 9 Issue 8 Pages Bulletin No. 51
Keywords Lighting; Energy; Economics; Planning
Abstract It is the purpose of this bulletin to make available information concerning street illumination. The suggestion which led to this compilation came from the many inquiries received by the Electrical Engineering Department each year from those interested in framing ordinances permitting corporations or individuals to operate street lighting systems. An attempt has been made to present this information in such a form as to be readily understood by the general public, without requiring any special technical knowledge. The data have been compiled from reliable sources, and checked in many instances by tests conducted by the writers.
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Publisher University of Illinois at Urbana Champaign, College of Engineering Place of Publication Editor
Language English Summary Language Original Title
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Notes Approved no
Call Number GFZ @ kyba @ Serial 2739
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Author Agbo David, O., Madukwe Chinaza, A., & Anyalewechi Chika, J.
Title Development of Solar Power Intelligent Street Lights System Type Journal Article
Year 2019 Publication International Journal of Scientific and Research Publications Abbreviated Journal
Volume (up) 9 Issue 6 Pages
Keywords Lighting; Energy
Abstract The lack of natural light during night time in the urban environment has always been a problem. From people not being able to see where they are going, to the greater chance of being attacked or mugged at night which as we all know is a problem that has been in existence since humans started living together. The main advantage of this system exists in the reduction of costs related to energy consumption by the street light by integrating a vehicle/human detection algorithm into the system. The introduction of this vehicle/human detection algorithm further reduces the power consumption costs. In this project, solar PV is used to supply the energy to charge the battery. The battery later powers the operation of the whole system. The 12- 17V of the solar is buck to a steady 12V for battery charging. A light sensor is connected to the microcontroller that sense the light during day time, when the presence of day light is sensed the microcontroller turns ON the mosfet of the buck converter. If the voltage of the solar PV is greater than 12V, it charges the battery and switches off the load transistor. But at dawn, when the solar PV voltage is less than 12V the microcontroller turn OFF the buck converter mosfet and switch ON the load transistor. When no vehicle or human is detected for 10mins the microcontroller dims the LED lamp. If vehicle or human is detected the microcontroller brighten the LED lamp and inform the next microcontroller to brighten its LED lamp. If the next street light did not detect a vehicle or human after 10 mins it dims the lamp but if it detects a vehicle or human the lamp remain brightened. The microcontroller uses the ultrasonic sensor to detect object and the PIR sensor to detect human. The RF module is used for communication between the microcontrollers to inform each other the presence of vehicle or human.
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Notes Approved no
Call Number IDA @ intern @ Serial 2971
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