Hot Resistivity of Tungsten Wires

Davis, G. L.

doi:10.1038/196565a0

Cited by 12 publications

(3 citation statements)

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“…Besides the steady increase of the luminous efficiency with electric power, we have also observed a linear tendency between both parameters. Above 600 K, the temperature dependence of the tungsten filament with the electric power [28][29][30] follows a quasi-linear trend. This effect is due to the direct relationship between the electrical resistance of the cathode and the temperature raised to the power of 1.2 [28,29].…”

Section: Incandescent and Halogen Lampsmentioning

confidence: 95%

“…Above 600 K, the temperature dependence of the tungsten filament with the electric power [28][29][30] follows a quasi-linear trend. This effect is due to the direct relationship between the electrical resistance of the cathode and the temperature raised to the power of 1.2 [28,29]. According to Wien's displacement law, an almost linear behavior of the temperature with the electric power supplied leads to an almost linear behavior of the maximum emission wavelength with the same electric power.…”

Section: Incandescent and Halogen Lampsmentioning

confidence: 99%

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Determining the efficiency of optical sources using a smartphone’s ambient light sensor

et al. 2016

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This work reports the use of a smartphone's ambient light sensor as a valuable tool to study and characterize the efficiency of an optical source. Here, we have measured both luminous efficacy and efficiency of several optical sources (incandescent bulb and halogen lamp) as a function of the electric power consumed and the distance to the optical detector. The illuminance of LEDs as a function of the distance to the optical detector is characterized for different wavelength emissions. Analysis of the results confirms an inverse-square law of the illuminance with the detector-source distance and shows good agreement with values obtained by classical experiments. This experience will trigger awareness in students in terms of sustainability, light propagation and efficiency of different optical sources.

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Section: Incandescent and Halogen Lampsmentioning

confidence: 95%

Section: Incandescent and Halogen Lampsmentioning

confidence: 99%

Determining the efficiency of optical sources using a smartphone’s ambient light sensor

et al. 2016

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“…While Davis held that the Christian Trinity was mythological dross merely, he had great reverence for the person of Jesus-"a good man, a noble and unparalleled Moral Reformer" and "a type of a perfect man, both in physical and spiritual qualities." 129 Picking up the Unitarian humanization of Jesus, Davis maintained his culture's reverence for the Nazarene but naturalized him through the twin sciences of Mesmerism and phrenology in a clairvoyant retelling of the life of Jesus that looked back to the rationalist Jefferson Bible and forward to later "hidden gospels." 130 Because of his "perfect symmetry of .…”

Section: Prophetic Evolutionmentioning

confidence: 99%

Andrew Jackson Davis and Spiritualist Constructions of Religion(s)

Messamore

2023

Religion and Am. Culture

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That the concept of religion is of recent construction is well established in the literature. What is less understood is the American contribution to this global discourse, in particular its nineteenth-century popularization below the upper echelons of Unitarians, Transcendentalists, and comparative religion scholars. The small but very influential group of Spiritualists associated with the seer Andrew Jackson Davis offer a fascinating window into popular construals of religion and world religions—here, internally oriented, naturalized, and evolutionary—taking shape amid increasing globalization and the challenge of scientific materialism. The subdiscourse articulated by Davis and his circle provides an interesting case not only for its antiinstitutional and individualized qualities but also for its radical decentering of Christianity and paradoxical relationship to science. Moreover, Davis's efforts to define true religion and frame his system as its purest expression are connected to struggles for legitimacy within the public sphere and contests concerning religious authority.

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Interface heat transfer and thermal accommodation coefficients: Heated tungsten wire in nitrogen environment

Chen

Saxena

1974

International Journal of Heat and Mass Transfer

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Hot Resistivity of Tungsten Wires

Cited by 12 publications

References 0 publications

Determining the efficiency of optical sources using a smartphone’s ambient light sensor

Determining the efficiency of optical sources using a smartphone’s ambient light sensor

Andrew Jackson Davis and Spiritualist Constructions of Religion(s)

Interface heat transfer and thermal accommodation coefficients: Heated tungsten wire in nitrogen environment

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