Results 71 to 80 of about 15,115 (238)

Objective Measurement of Tooth Color Using Spectrophotometry and ICDAS: Quantifying CIELAB Color Changes Across Caries Severity

Journal of Esthetic and Restorative Dentistry, EarlyView.
ABSTRACT Objective The International Caries Detection and Assessment System (ICDAS) is widely used for early caries detection but relies on visual interpretation. Although spectrophotometry objectively quantifies tooth color, variation across ICDAS categories and its relationship with lesion severity remain unclear. The present in vitro study therefore
Farah Rashid, James Dudley
wiley   +1 more source

Assessing Color Inconstancy of CAD/CAM Materials: Influence of CIE White LED Illuminants and Substrate Shade

Journal of Esthetic and Restorative Dentistry, EarlyView.
ABSTRACT Objective To assess how the CIE white LED illuminants and substrate shade impact the color inconstancy of high‐translucency CAD/CAM materials. Materials and Methods From the spectral reflectance factors of Lava Ultimate‐LU, Grandio blocks‐GB, VITA Enamic‐VE, and VITA Mark II‐M specimens (n = 3/material) measured on nine background shades (ND1 ...
Bruno Arruda Mascaro, Maria Tejada‐Casado, Miguel Ángel Martínez‐Domingo, Renata Garcia Fonseca, José Maurício dos Santos Nunes Reis, María M. Pérez   +5 more
wiley   +1 more source

A comparison of illuminance values obtained from three illuminance measuring instruments

, 2022
MHSC (Occupational Hygiene), North-West University, Potchefstroom CampusIn the field of occupational hygiene, light and the use of different lighting types have become fundamental control measures in reducing risks to health and safety while at the same
Holleran, Cavan Ian
core  

The Ecology of Human Sleep (EcoSleep) Cohort Study: Protocol for a longitudinal repeated measurement burst design study to assess the relationship between sleep determinants and outcomes under real‐world conditions across time of year

Journal of Sleep Research, Volume 34, Issue 2, April 2025.
Summary The interplay of daily life factors, including mood, physical activity, or light exposure, influences sleep architecture and quality. Laboratory‐based studies often isolate these determinants to establish causality, thereby sacrificing ecological validity.
Anna M. Biller, Nayab Fatima, Chrysanth Hamberger, Laura Hainke, Verena Plankl, Amna Nadeem, Achim Kramer, Martin Hecht, Manuel Spitschan   +8 more
wiley   +1 more source

A comparison of three approaches for determining scalar illuminance from cubic illuminance data

, 2018
A method for calculating scalar illuminance using cubic illuminance values in a light field has been proposed in the literature. This enables exact measurement of the illuminance vector direction and magnitude by a fixed device, as well as providing a ...
RA Mangkuto
core   +1 more source

Investigating the Combined Effect of Artificial Light at Night and Noise on Sleep Quality of High School Students

Journal of Sleep Research, EarlyView.
Adolescents today are heavily exposed to ALAN from different sources, including cellular phones, personal computers, tablets, as well as other indoor and outdoor light sources, which affects the quality of their sleep. ABSTRACT Adolescents frequently use smartphones, smartwatches, personal computers, tablets, and other electronic devices during the day
Hassan Shama, Orna Tzischinsky, Boris A. Portnov   +2 more
wiley   +1 more source

Lights On or Off? The Efficacy of Light Therapy as Add‐On to Cognitive Behavioural Therapy for Insomnia—A Pilot Study

Journal of Sleep Research, EarlyView.
ABSTRACT Cognitive behavioural therapy for insomnia (CBT‐I) is recommended as first‐line treatment for insomnia disorder. However, around 25% of the patients do not respond to the treatment, and only 40% achieve full remission. The current study investigates the therapeutic potential of light therapy as an add‐on to CBT‐I.
Sarah R. Schmid, Christine Blume, Johanna Ell, Nikolas Konzen, Matthias Apweiler, Bernd Feige, Bernd L. Fiebich, Julian E. Schiel, Katharina Domschke, Kai Spiegelhalder   +9 more
wiley   +1 more source

Calculation of illuminance of differently shaped spaces [PDF]

, 2014
In this graduation thesis I analyzed, by using VELUX Daylight Visualizer software, how shape of space and shape of window influence on daylight illuminance, by considering minimal requirements of rule books and standards discussing daylight illuminance ...
Mavsar, Sandra
core  

Estimate daylight illuminance using the model formula of daylight illuminance distribution [PDF]

, 2014
知的照明システムにおける実証実験の結果から、机上面に照度センサを設置しない新たな知的照明システムが必要であると考えた。この制御手法では、机上面の外光照度を推定する必要がある。そこで我々は外光照度の推定について研究を行っている。しかし前報の外光照度推定手法では、照度計測やモデル式の探索などに膨大な時間が必要であった。そこで本稿では室内の外光照度分布について検証を基に外光照度分布のモデル式を導出し導出したモデル式を用いることで机上面の外光照度を推定する手法を提案する ...
中林, 弘光, Nakabayashi, Hiromitsu, 19645, 間, 博人, 9000249538226, Taniguchi, Takeshi, Aida, Hiroto, 桑島, 奨, 19680, ミキ, ミツノリ, 90150755, 9000242474259, 1000090150755, 19646, 15427, 19648, アイダ, ヒロト, 谷口, 武, ナカバヤシ, ヒロミツ, クワジマ, ショウ, 9000249538230, 三木, 光範, マツシタ, ショウヘイ, 9000249538196, DA10659506, 9000249538198, Kuwajima, Sho, 0000-0002-2170-8986, 9000237774540, イケガミ, ヒサノリ, Ikegami, Hisanori, 松下, 昌平, 池上, 久典, 18925, Matsushita, Shohei, Miki, Mitsunori, タニグチ, タケシ, 19516   +37 more
core   +1 more source

The effects of spectrum, irradiance, and duration of exposure on light‐induced melatonin suppression in healthy adults

Photochemistry and Photobiology, EarlyView.
The left panel reports the measured time course data of melatonin concentration in the blood plasma of 17 BL‐Rs and 15 BL‐NRs at baseline, during a two‐hour stay in the dark, during a one‐hour light exposure to blue light, and again in the dark. The right panel shows the magnitude of melatonin concentration after 60 min of exposure to warm white, cool ...
Helmut Piazena, Leonora Franke, Ralf Uebelhack, Thomas Penzel, Ingo Fietze   +4 more
wiley   +1 more source