位勢與場（上）

2021-01-28 Sin-iu 發表迴響

本文主要參考 Griffiths, David J. Introduction to Electrodynamics (4th edition), Pearson, ISBN 13: 978-0-321-85656-2 Section 10.1。

程度：中等／大學部二年級電磁學

在得到馬克士威方程組

$\begin{array}{lllll} \text{(i)}&\boldsymbol\nabla\boldsymbol\cdot\mathbf{E}=\dfrac{1}{\epsilon_0}\rho, & & \text{(iii)}&\boldsymbol\nabla\boldsymbol\times \mathbf{E}=-\dfrac{\partial \mathbf{B}}{\partial t}, \\[10pt]\text{(ii)}&\boldsymbol\nabla\boldsymbol\cdot\mathbf{B}=0, & &\text{(iv)}&\boldsymbol\nabla\boldsymbol\times \mathbf{B}=\mu_0\mathbf{J}+\mu_0\epsilon_0\dfrac{\partial \mathbf{E}}{\partial t}\end{array}$ … (1)

之後，我們想要求它的通解。這就是說，給定任一時刻、任一點的電荷組態（包含電荷密度 $\rho(\mathbf{r},t)$ 和電流密度 $\mathbf{J}(\mathbf{r},t)$ ），如何求電場 $\mathbf{E}(\mathbf{r},t)$ 與磁場 $\mathbf{B}(\mathbf{r},t)$ 。

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古典文學, 台語

李白〈將進酒〉台語白話字注音

2021-01-27 Sin-iu 發表迴響

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天文物理學

Some Prestigious Journals of Astrophysics

2021-01-20 Sin-iu 發表迴響

This article is an incomplete catalog of some highly-regarded journals on astrophysics, astronomy, or cosmology.
One can find more journals on the list of astronomy journals (Wikipedia).

The Astrophysical Journal

The Astrophysical Journal is a peer-reviewed scientific journal of astrophysics and astronomy… The journal discontinued its print edition and became an electronic-only journal in 2015.
Wikipedia

Casual abbreviation: ApJ
Standard abbreviations: Astrophys. J. (ISO 4)
History: 1895–present
Publisher: IOP Publishing for the American Astronomical Society
Frequency: 3/month
Open access: Hybrid and delayed
Impact factor: 5.745 (2019)
Indexing
- CODEN: AAEJAF
- ISSN:
  - 0004-637X (print)
  - 1538-4357 (web)
Links
- Journal homepage
- Wikipedia page

Astronomy & Astrophysics

Astronomy & Astrophysics is a peer-reviewed scientific journal covering theoretical, observational, and instrumental astronomy and astrophysics … Several sections of the journal are available in Open Access, and the latest issue is also available for free online reading on the journal website.
Wikipedia

Casual abbreviation: A&A
Standard abbreviations: Astron. Astrophys. (ISO 4)
History: 1969–present
Publisher: EDP Sciences for European Southern Observatory
Frequency: monthly
Open access: Delayed, 12 months
Impact factor: 5.636 (2019)
Indexing
- CODEN: AAEJAF
- ISSN:
  - 0004-6361 (print)
  - 1432-0746 (web)
- LCCN: 74220573
- OCLC: no. 1518497
Links