scholarly journals Colour temperature tunable RGBW clusters with 3 control channels

2020 ◽  
Vol 12 (1) ◽  
pp. 10 ◽  
Author(s):  
Daria Kalustova ◽  
Vasyl Kornaga ◽  
Andrii Rybalochka ◽  
Ying-Jie Yu ◽  
Sergiy Valyukh
Keyword(s):  
New York ◽  
Colour Temperature ◽  
Smart Lighting ◽  
Engineering Society ◽  
Quantum Electron ◽  
Wide Range ◽  
Red Led ◽  
Colour Rendering ◽  
Red Leds ◽  
Spectral Responses

The work is devoted to development of a smart lighting system that is able to change correlated colour temperature and consists of tunable 4-components RGBW clusters controlled via three channels. It is shown that fixing a ratio between the intensities of white and red LEDs at a level of 100:9 enables obtaining high values of colour rendering in a wide range of correlated colour temperatures. A control of 3 from 4 channels simplifies the system. The influence of the red LED on CRI and luminous efficiency is analysed. Full Text: PDF References:J. Gooley, S. Rajaratnam, G. Brainard, R. Kronauer, C. Czeisler and S. Lockley, "Spectral Responses of the Human Circadian System Depend on the Irradiance and Duration of Exposure to Light", Sci Transl Med 2, 31 (2010) [CrossRef]A. Borisuit, F. Linhart, J. Scartexxini, M. Munch, Light Res Technol 47, 192 (2014) [CrossRef]Q. Dai, W. Cai, L. Hao, W Shi and Z. Wang, Light Res Technol 50 (8), 1198-1211 (2017), [CrossRef]V. Kornaga, V. Sorokin, A. Rybalochka, O. Oliinyk and N. Kornaga, Semicond Phys Quantum Electron Optoelectron 18, 302 (2015) [CrossRef]Illuminating Engineering Society, ANSI/IES TM-30-18 IES method for evaluating light source color rendition (2018). New York, NY[DirectLink]Commission International de l'Éclairage, CIE 224:2017 Colour fidelity index for accurate scientific use (2017). Vienna [CrossRef]V. Kornaga, D. Kalustova and O. Oliynyk, Int Sci Conf "Light and power eng: hist, probl, perspect" 6, 43 (2018) [DirectLink]

A white–cyan-red LED system for low correlated colour temperature lighting

2015 ◽  
Vol 49 (3) ◽  
pp. 343-356 ◽  
Author(s):  
M Chakrabarti ◽  
A Thorseth ◽  
DD Corell ◽  
C Dam-Hansen
Keyword(s):  
White Light ◽  
Colour Temperature ◽  
White Leds ◽  
Geometrical Modelling ◽  
Red Led ◽  
Colour Gamut ◽  
Museum Display ◽  
Colour Rendering ◽  
Red Leds ◽  
Planckian Locus

A white LED complemented by cyan and red LEDs is a good candidate for achieving high colour rendering at low correlated colour temperatures. This is usually very difficult with commercially available white LEDs. In addition, the system is able to replace incandescent lighting in many applications; for example, the lighting for museum display cases. To investigate and optimize the colour and light distribution properties, both spectral and geometrical modelling are used. Mapping of the possible combinations of LEDs is used to locate the optimal solutions within the colour gamut, with emphasis on chromaticity and colour rendering indices. A geometric optical model is used to design and optimize the homogeneity of the colour and light intensity distribution as a function of angle. The resulting system produces diffused homogeneous white light with a tunable correlated colour temperature from 2000 K to 2400 K. Within this range the white light is characterized by a high general colour rendering index (Ra > 90), special colour rendering indices for saturated red objects (R9 > 85), and low chromaticity distance (Duv) from the Planckian locus (Duv < 2 × 10−3).

Charles Olson and American Modernism

2018 ◽  
Author(s):  
Mark Byers
Keyword(s):  
New York ◽  
Political Action ◽  
The Self ◽  
Instrumental Reason ◽  
Charles Olson ◽  
American Modernism ◽  
Avant Garde ◽  
Wide Range ◽  
American Poet ◽  
Mark Rothko

The Practice of the Self situates the work of American poet Charles Olson (1910–70) at the centre of the early postwar American avant-garde. It shows Olson to have been one of the major advocates and theorists of American modernism in the late 1940s and early 1950s; a poet who responded fully and variously to the political, ethical, and aesthetic urgencies driving innovation across contemporary American art. Reading Olson’s work alongside that of contemporaries associated with the New York Schools of painting and music (as well as the exiled Frankfurt School), the book draws on Olson’s published and unpublished writings to establish an original account of early postwar American modernism. The development of Olson’s work is seen to illustrate two primary drivers of formal innovation in the period: the evolution of a new model of political action pivoting around the radical individual and, relatedly, a powerful new critique of instrumental reason and the Enlightenment tradition. Drawing on extensive archival research and featuring readings of a wide range of artists—including, prominently, Barnett Newman, Mark Rothko, David Smith, Wolfgang Paalen, and John Cage—The Practice of the Self offers a new reading of a major American poet and an original account of the emergence of postwar American modernism.

Research Note: LED chip-on-board packaging technology for strict colour tolerance

2017 ◽  
Vol 49 (8) ◽  
pp. 1052-1057
Author(s):  
J Zhang ◽  
P Ge ◽  
Z Zhou ◽  
D Liu ◽  
H Wang ◽  
...  
Keyword(s):  
Research Note ◽  
Luminous Efficacy ◽  
Packaging Technology ◽  
Colour Temperature ◽  
Colour Rendering ◽  
Method Show

In the field of LED packaging, people usually pay more attention to colour temperature, luminous efficacy and colour rendering than colour tolerance. This paper focuses on how to meet strict colour tolerances in the process of chip-on-board packaging. The McAdam ellipses are used to explain the meaning of colour tolerance. A method based on adjusting the amount of phosphor glue and the proportions of different phosphors it contains is described. Measurements on samples packaged according to this method show that it makes it possible to meet strict colour tolerance requirements.

scholarly journals Dialogic & Critical Pedagogies: An Interview with Ira Shor

2017 ◽  
Vol 5 ◽  
Author(s):  
Ira Shor ◽  
Eugene Matusov ◽  
Ana Marjanovic-Shane ◽  
James Cresswell
Keyword(s):  
New York ◽  
Critical Pedagogy ◽  
Critical Literacy ◽  
Paulo Freire ◽  
Central Feature ◽  
Community Members ◽  
Dialogic Pedagogy ◽  
Language And Thought ◽  
Wide Range ◽  
Critical Pedagogies

In 2016, the Main Editors of Dialogic Pedagogy Journal issued a call for papers and contributions to a wide range of dialogic pedagogy scholars and practitioners. One of the scholars who responded to our call is famous American educator Ira Shor, a professor at the College of Staten Island, City University of New York. Shor has been influenced by Paulo Freire with whom he published, among other books, “A Pedagogy for Liberation” (1986), the very first “talking book” Freire did with a collaborator. His work in education is about empowering and liberating practice, which is why it has become a central feature of critical pedagogy.Shor’s work has touched on themes that resonate with Dialogic Pedagogy (DP). He emphasises the importance of students becoming empowered by ensuring that their experiences are brought to bear. We were excited when Shor responded to our call for papers with an interesting proposal: an interview that could be published in DPJ, and we enthusiastically accepted his offer. The DPJ Main Editors contacted the DPJ community members and asked them to submit questions for Ira. The result is an exciting in-depth interview with him that revolved around six topics: (1) Social Justice; (2) Dialogism; (3) Democratic Higher Education; (4) Critical Literacy versus Traditional Literacy; (5) Paulo Freire and Critical Pedagogy; and (6) Language and Thought. Following the interview, we reflect on complimentary themes and tensions that emerge between Shor’s approach to critical pedagogy and DP.

Intellectual Impairment in Children of Women Who Smoke Cigarettes During Pregnancy

PEDIATRICS ◽  
1994 ◽  
Vol 93 (2) ◽  
pp. 221-227 ◽  
Author(s):  
David L. Olds ◽  
Charles R. Henderson ◽  
Robert Tatelbaum
Keyword(s):  
New York ◽  
Cigarette Smoking ◽  
Smoking During Pregnancy ◽  
Maternal Cigarette Smoking ◽  
Upstate New York ◽  
Wide Range ◽  
Neurodevelopmental Impairment ◽  
The Relationship ◽  
Additional Reason

Objective. To examine the relationship between maternal cigarette smoking during pregnancy and children's intellectual functioning during the first 4 years of life. Design. Prospective follow-up of participants in a randomized trial of pregnancy and infancy nurse home visitation. Setting. Semirural community in Upstate New York. Participants. 400 families in which the mothers registered before the 30th week of pregnancy and had no previous live births. Eighty-five percent of the mothers were either teenagers (&lt;19 years at registration), unmarried, or poor. Analysis limited to whites who comprised 89% of the sample. Main results. Children in the comparison group whose mothers smoked 10 or more cigarettes per day during pregnancy had Stanford-Binet scores at 3 and 4 years of age that were 4.35 (95% CI: 0.02, 8.68) points lower (after controlling for a wide range of variables) than their counterparts whose mothers did not smoke during pregnancy. Conclusions. The results of this study add to the increasingly consistent evidence that maternal cigarette smoking during pregnancy poses a unique risk for neurodevelopmental impairment among children and provide an additional reason for pregnant women not to smoke cigarettes.

A Conversation with Aliza Shvarts

October ◽  
2021 ◽  
pp. 85-110
Author(s):  
Emily Apter
Keyword(s):  
New York ◽  
The Body ◽  
Yale University ◽  
Wide Range ◽  
The Subject ◽  
First Time ◽  
Rape Kits ◽  
Public Exhibition ◽  
Feminist Practice

Abstract Aliza Shvarts first came to widespread attention when her Untitled [Senior Thesis] (2008), consisting of a yearlong performance of self-induced miscarriages, was declared a “fiction” by Yale University and censored from public exhibition. That controversial work was on view for the first time in New York as part of her 2020 exhibition Purported at Art in General. It frames the areas of inquiry she has continued to explore: how the body means and matters and how the subject consents and dissents. In this in-depth conversation, Emily Apter and Aliza Shvarts discuss the exhibition and a wide range of topics relevant to contemporary feminist practice and thought: the genealogy of citation; the uses of theory; speech action; rape kits; nonconsensual collaboration; queer kinship; and memes.

Hospital Care in the United States, Commission on Hospital Care, New York, The Commonwealth Fund

PEDIATRICS ◽  
1950 ◽  
Vol 6 (1) ◽  
pp. 172-172
Keyword(s):  
New York ◽  
Hospital Care ◽  
The United States ◽  
Hospital Services ◽  
Source Book ◽  
American Hospital ◽  
American Hospital Association ◽  
Commonwealth Fund ◽  
Wide Range ◽  
Present Pattern

Many individuals and organizations have had a part in the making of this book. They have described influences and forces whose interaction has resulted in the present pattern of our hospital services, and documented their interpretations. The result is a source book of basic information which should be valuable for all students of hospital problems. The Commission was appointed by the American Hospital Association, and chosen to represent a wide range of those providing hospital, health and welfare services, as well as the consuming public.

Anti-sage

2017 ◽  
Author(s):  
John L. Culliney ◽  
David Jones
Keyword(s):  
New York ◽  
Educational Administration ◽  
Economic Life ◽  
The Other ◽  
New York University ◽  
Terrorist Organizations ◽  
Politics And Government ◽  
The Social ◽  
Wide Range ◽  
The World

Chapter 10 proceeds in light of our suggestion that sagely behavior is freely chosen, benign, yet powerful, and seeks cooperation in the world in ways that are positive, progressive, nurturing, and constructive in nature. This chapter, however, accounts for people who have been gifted with or have assiduously developed powers of rapport or charisma, achieving notable fractal congruence in the social, political, or economic life of institutions or communities but who have gone the other way. This phenomenon over a wide range of scale can elevate those who become destructive or aggrandizing to the ultimate detriment of society. Numerous followers can gravitate to the kind of socially-fractally-adept individual that we call an anti-sage. The chapter discusses examples of the antisage phenomenon in cults and terrorist organizations such as the People’s Temple and Aum Shinrykyo. In this narrative pertinent expressions of human selfness include: Protean self vs. fundamentalist self and parochial altruism. Also explored are politics and government, notably the administration of George W. Bush, creed-based religions, particularly Christianity and Islam, and aggrandizement in educational administration, such as that of John Sexton’s presidency of New York University.

Tomato spotted wilt tospovirus. [Distribution map].

1999 ◽  
Author(s):  
Keyword(s):  
New York ◽  
South Carolina ◽  
Tamil Nadu ◽  
Russian Far East ◽  
Far East ◽  
South Australia ◽  
Peninsular Malaysia ◽  
Distribution Map ◽  
Tomato Spotted Wilt ◽  
Wide Range

Abstract A new distribution map is provided for Tomato spotted wilt tospovirus Viruses: Bunyaviridae: Tospovirus Hosts: Occurs naturally on a very wide range of herbaceous horticultural and field crops. Information is given on the geographical distribution in EUROPE, Austria, Belgium, Bulgaria, Croatia, Czech Republic, Denmark, Finland, France, Mainland France, Germany, Greece, Crete, Mainland Greece, Hungary, Ireland, Italy, Mainland Italy, Sicily, Lithuania, Malta, Moldova, Netherlands, Norway, Poland, Portugal, Mainland Portugal, Romania, Russian Far East, Southern Russia, Slovakia, Spain, Canary Islands, Mainland Spain, Sweden, Switzerland, UK, Channel Islands, England and Wales, Scotland, Ukraine, Yugoslavia (Fed. Rep), ASIA, Afghanistan, Armenia, Azerbaijan, China, Sichuan, Cyprus, Republic of Georgia, India, Andhra Pradesh, Haryana, Himachal Pradesh, Karnataka, Madhya Pradesh, Maharashtra, Tamil Nadu, Uttar Pradesh, Iran, Israel, Japan, Hokkaido, Honshu, Ryukyu Archipelago, Malaysia, Peninsular Malaysia, Nepal, Oman, Pakistan, Saudi Arabia, Sri Lanka, Taiwan, Thailand, Turkey, Uzbekistan, AFRICA, Algeria, Burkina Faso, Congo Democratic Republic, Cote d'Ivoire, Egypt, Libya, Madagascar, Mauritius, Niger, Nigeria, Reunion, Senegal, South Africa, Sudan, Tanzania, Uganda, Zimbabwe, NORTH AMERICA, Canada, Alberta, British Columbia, Manitoba, Nova Scotia, Ontario, Quebec, Saskatchewan, Mexico, USA, Alabama, Arkansas, California, Connecticut, Delaware, Florida, Georgia, Hawaii, Idaho, Indiana, Iowa, Kansas, Kentucky, Louisiana, Maine, Massachusetts, Michigan, Minnesota, Mississippi, Missouri, Montana, Nebraska, Nevada, New Hampshire, New Mexico, New York, North Carolina, North Dakota, Ohio, Oklahoma, Oregon, Pennsylvania, South Carolina, South Dakota, Tennessee, Texas, Utah, Vermont, Virginia, Washington, Wisconsin, Wyoming, CENTRAL AMERICA & CARIBBEAN, Costa Rica, Haiti, Jamaica, Martinique, Puerto Rico, SOUTH AMERICA, Argentina, Bolivia, Brazil, Goias, Minas Gerais, Parana, Sao Paulo, Chile, Colombia, Guyana, Paraguay, Suriname, Uruguay, Venezuela, OCEANIA, Australia, New South Wales, Northern Territory, Queensland, South Australia, Tasmania, Victoria, Western Australia, Cook Islands, New Zealand, Papua New Guinea.

VISUAL EFFECTS OF OBJECTS UNDER METAMERISM WITH MULTI-SPECTRAL LIGHT SOURCE

2021 ◽  
Author(s):  
Y.M. Li ◽  
H. Fan ◽  
C.H. Lin ◽  
J.U. Chong ◽  
T.X. Lee
Keyword(s):  
Light Source ◽  
Positive Relationship ◽  
Target Object ◽  
Visual Effects ◽  
Colour Temperature ◽  
Lighting Conditions ◽  
The Future ◽  
Convenience Sampling ◽  
Colour Rendering

This study attempts to simulate the metamerism colour, and the guava was used as the target object. We design four sets of metamers with a correlated colour temperature of 4000K and an illuminance of 750lux. The light source was simulated in the LED cube. The subjects with convenience sampling observed the visual effects, including look delicious, colourful, and colour rendering of guava under metamerism, then analysed its relationship with CRI and CQS. The results showed that colour rendering and visual effects are not a positive relationship, and the effect of CQS is closer to the visual effects of the subjects. The results of this study can be used as a reference for light source lighting designers as a basis for improving lighting conditions. In the future, we can collect databases for the different objects with an optimized multi-spectral light source.

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