|
所在平台: Coursera |
课程主页: https://www.coursera.org/learn/life-health-radiation
课程评论：没有评论
课程名称：生命、健康与辐射 课程概述：辐射无处不在，缺少它我们无法生存。然而，辐射一词常常与危险、死亡和灾难挂钩。本在线课程旨在让大家重新认识辐射，揭示它的益处与风险。例如，X射线辐射是一项科学和医学的发现，改善或延长了数十亿人的生命。尽管大多数人都经历过X射线检查，但却很少有人真正理解X射线是什么，以及它的来源。 本课程将带领学习者探索电磁辐射的光谱，从极长到极短的波长。在每个重要的节点，我们将一起探讨以下问题： - 该辐射的波长和频率是什么？ - 它是电离辐射吗？ - 谁发现了它，如何发现的？ - 该辐射的应用有哪些？ - 相关的风险是什么？ 通过这样的探讨，我们希望澄清一个常常让人感到困惑和担忧的主题。 课程大纲： 第1部分：原子相互作用 描述：欢迎参加本在线课程！本周我们将深入研究原子的世界。首先理解原子的结构，然后探讨辐射与原子的相互作用。本模块还将解析两种辐射：颗粒辐射和电磁辐射，并首次浏览电磁光谱。 第2部分：长波辐射 描述：本周我们开始横跨电磁光谱的旅程，从长波辐射开始。这些主要是覆盖广泛频率和特性的无线电波以及红外波。长波辐射不属于电离辐射，因此不致癌，但围绕它们仍有许多误解。让我们共同探索长波辐射在日常生活中的多种应用，消除相关的神话。 第3部分：光作为辐射 描述：我们的旅程继续，下一站是可见光和紫外辐射。我们将研究电离辐射如何与原子相互作用，以及这些辐射对我们身体可能造成的损害。我们还将探讨身体如何修复这些损害以及在大多数情况下是如何保护我们免受其有害影响的。 第4部分：电离辐射 描述：本周我们将进一步探索电磁光谱，聚焦于波长最小、能量最高的频率：X射线和伽马射线。我们将探讨这些辐射是如何产生的，背后有趣的发现历史，以及它们在医用成像中的应用。同时，我们也将讨论电离辐射与癌症之间的关系，并研究个性化风险的概念。 第5部分：健康中的辐射 描述：随着我们完成了电磁光谱的探究，接下来将我们所学的内容放入健康的背景中。换句话说，我们将探讨不同的辐射如何在医疗成像和某些治疗中被应用。沿途，您还将认识悉尼大学医学辐射科学的许多同事。
Part: 1
Title:Atomic interactions
Description:Welcome to the MOOC! This week, we will drill down and examine the world of atoms. By first understanding the structure of atoms, we can then look at how radiation interacts with them. In this module, we will also unpack the two kinds of radiation: particulate and electromagnetic. We will then take our first glimpse at the electromagnetic spectrum.
Part: 2
Title:Longwave radiation
Description:This week, we begin our journey across the electromagnetic spectrum, starting at the long wave radiations. These are essentially radio waves, which cover a wide range of frequencies and properties, and infrared waves. Long wave radiations are not ionising and are therefore not carcinogenic, however there are still many misconceptions about them. Come explore the many applications of long wave radiation in everyday life and dispel the myths surrounding some of them.
Part: 3
Title:Light as radiation
Description:We continue on our journey across the electromagnetic spectrum. Next stop: visible light and ultraviolet radiation. We will investigate how ionising radiations are able to interact with our atoms and the kinds of damage they can subsequently have on our bodies. We will also examine how our bodies repair these kinds of damage and (in most cases) protect us from their harmful effects.
Part: 4
Title:Ionising radiation
Description:This week we go further down the electromagnetic spectrum to the range with the smallest, most energetic frequencies: X-rays and gamma rays. We will explore how these radiations are produced, the fascinating histories behind their discoveries, plus how they're useful in medical imaging. We will also discuss the link between ionising radiations and cancer, and examine the concept of personalised risk.
Part: 5
Title:Radiation in health
Description:As we have now finished our journey across the electromagnetic spectrum, we will now put everything we have learnt so far into a health context. In other words, we will examine how different radiations are used in medical imaging and even for certain treatments. Along the way, you will meet many of my colleagues here at the University of Sydney’s Discipline of Medical Radiation Science.
Radiation is all around us - without it we wouldn’t exist. Yet the word has become synonymous with danger, death and disaster. This MOOC will allow the world to see radiation in a new light, to expose its benefits as well as its risks. X-ray radiation, for example, is a scientific and medical discovery that has improved or prolonged billions of lives. Most of us have had an X-ray at some point in our life, at the Dentist, in a hospital or clinic. Yet few people really understand what X-rays are or where they come from. In this course, we will travel along the spectrum of electromagnetic radiation from unimaginably long to infinitesimally small wavelengths. At each significant point along the way we will stop and consider: What is the wavelength and frequency of this radiation? Is it ionising or not? Who discovered it and how? What are the uses of this radiation and What are the risks associated with it? Through this we hope to clarify a topic that is often confusing and concerning for many.
