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Updated: Sep 17, 2025

A Method of Trigonometric Modelling of Seasonal Variation Demonstrated with Multiple Sclerosis Relapse Data
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A Method of Trigonometric Modelling of Seasonal Variation Demonstrated with Multiple Sclerosis Relapse Data

Published on: December 9, 2015

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如何应对黑暗:模拟和可视化零膨胀的个人光照暴露数据在对数尺度上

Johannes Zauner1,2, Carolina Guidolin1,2, Manuel Spitschan1,2,3

  • 1TUM School of Medicine and Health, Department Health and Sport Sciences, Chronobiology & Health, Technical University of Munich, Munich, Germany.

Journal of biological rhythms
|June 28, 2025
PubMed
概括

在昼夜和近视研究中,处理零光值对于分析个人光线暴露至关重要. 这项研究引入了可视化符号逻辑尺度,并建议Tweedie分布或特定数据添加用于准确的统计建模.

关键词:
黑暗中的黑暗.数据的转换数据的转换.一个剂量计.暴露在光线中的模式.灯光日志登录 记录日志建模 建模模型 建模模型客观的照明暴露暴露在客观的照明暴露中.零通货膨胀 没有通货膨胀

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Visualization of Intensity Levels to Reduce the Gap Between Self-Reported and Directly Measured Physical Activity05:59

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Calibration Curves: Linear Least Squares

A calibration curve is a plot of the instrument's response against a series of known concentrations of a substance. This curve is used to set the instrument response levels, using the substance and its concentrations as standards. Alternatively, or additionally, an equation is fitted to the calibration curve plot and subsequently used to calculate the unknown concentrations of other samples reliably.
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Flame photometry, also known as flame emission spectrometry, is a technique used for the qualitative and quantitative analysis of elements present in a sample using a flame as the source of excitation energy. The concept of flame photometry was realized in the early 1860s by Kirchhoff and Bunsen, who discovered that specific elements emit characteristic radiation when excited in flames. The first instrument developed for this purpose was used to measure sodium (Na) in plant ash using a Bunsen...
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Maxwell-Boltzmann Distribution: Problem Solving

Individual molecules in a gas move in random directions, but a gas containing numerous molecules has a predictable distribution of molecular speeds, which is known as the Maxwell-Boltzmann distribution, f(v).
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Flame Photometry: Lab01:16

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In a flame photometer, when a solution like potassium chloride is aspirated into the flame, the solvent evaporates, leaving behind dehydrated salt. This salt dissociates into free gaseous atoms in their ground state. Some of these atoms absorb energy from the flame, leading to their excitation. The excited atoms return to the ground state, emitting photons at characteristic wavelengths. Because only electronic transitions are involved, the resulting emission lines are very narrow. The intensity...
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Clearance Models: Noncompartmental Models01:17

Clearance Models: Noncompartmental Models

Clearance is a pharmacokinetic parameter traditionally defined by compartment models, signifying the rate at which a drug is expelled from the body. However, a noncompartmental model offers an alternative method for assessing clearance, primarily employing empirical data obtained after administering a single drug dose.
The noncompartmental approach capitalizes on extensive sampling data, correlating the volume of distribution to systemic exposure and the administered dosage. This method enables...
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