OpenLLM-France/wikimedia huggingface dataset:
# Introduction to Astrophysics/Light Stars
## Birth

Once a protostar condenses to a sufficient density, hydrogen in its core begins to burn(fuse), and it becomes a main sequence star (on the main sequence on a Hertzsprung-Russell diagram)

## Main Sequence

During the majority of a "light" stars life, the center of the star has a high enough temperature and pressure that hydrogen atoms fuse to form helium. This process releases a great deal of energy (hence the appeal of fusion for generating electricity on Earth), which further increases the temperature and pressure in the center of the star. Eventually, this energy will work its way out of to the edges of the star, and will escape as light or other electromagnetic energy.

## Evolution

The star eventually runs out of hydrogen to "burn" in its center, and, if the temperature and pressure are high enough, helium will fuse into carbon, nitrogen and oxygen. CNO Cycle
    The CNO Cycle is not the process of fusing helium into carbon, nitrogen and oxygen!!! The CNO cycle describes how hydrogen is fused to helium, using carbon as a sort of katalysator.

## Death

When the star can no longer support fusion in its core, its internal energy source is depleted, and it will slowly cool to be a white dwarf. One famous example of a white dwarf is Sirius B, companion of Sirius. It is believed that Sirius B was more massive than Sirius itself. However, Sirius B now has as much mass as the Sun but is the size of Earth. Sirius B is very likely a new white dwarf, because it is one of the hottest known white dwarfs, with a surface temperature of about 26000 K. For comparison, the Sun's surface temperature is about 5770 K. In some other cases, the star will collapse and create an enormous explosion called supernova. Supernovae are extremely rare, for it only happens with a star at least 10 times bigger than our own Sun.
A white dwarf is believed to maintain its existence by electron degeneracy pressure. Pauli's Exclusion Principle, which states that no two electrons can be in the exact same state, provides a degeneracy pressure, which keeps the star from collapsing under its own gravity. The critical mass for a white dwarf is about 1.4 × M$_{sun}$. This is mass is known as the Chandrasekhar Limit, which no white dwarf can exceed.
$M_{ch}=\left({2 \over \mu _{e}}\right)^{2}1.459M_{\bigodot }$ Where $\mu _{e}$ is the mean electron molecular weight.
# Introduction to Astrophysics/Neutron Stars

A neutron star is a type of stellar remnant that can result from the gravitational collapse of a massive star during a Type II, Type Ib or Type Ic supernova event. Such stars are composed almost entirely of neutrons, which are subatomic particles without electrical charge and with slightly larger mass than protons. Neutron stars are very hot and are supported against further collapse by quantum degeneracy pressure due to the Pauli exclusion principle. This principle states that no two neutrons (or any other fermionic particles) can occupy the same place and quantum state simultaneously.
A typical neutron star has a mass between about 1.4 and 3.2 solar masses with a corresponding radius of about 12 km if the Akmal–Pandharipande–Ravenhall equation of state (APR EOS) is used.In contrast, the Sun's radius is about 60,000 times that. Neutron stars have overall densities predicted by the APR EOS of 3.7×1017 to 5.9×1017 kg/m3 (2.6×1014 to 4.1×1014 times the density of the Sun), which compares with the approximate density of an atomic nucleus of 3×1017 kg/m3. The neutron star's density varies from below 1×109 kg/m3 in the crust, increasing with depth to above 6×1017 or 8×1017 kg/m3 deeper inside (denser than an atomic nucleus). This density is approximately equivalent to the mass of a Boeing 747 compressed to the size of a small grain of sand, or the human population condensed to the size of a sugar cube.
In general, compact stars of less than 1.44 solar masses – the Chandrasekhar limit – are white dwarfs, and above 2 to 3 solar masses (the Tolman–Oppenheimer–Volkoff limit), a quark star might be created; however, this is uncertain. Gravitational collapse will usually occur on any compact star between 10 and 25 solar masses and produce a black hole.[10] Some neutron stars rotate very rapidly and emit beams of electromagnetic radiation as pulsars.
# Introduction to Astrophysics/Quasars

Quasars are typically massive and extremely remote to the other entities within space's "fabric". They emit huge amounts of energy and show up as a star in telescopic imagery. As this is only theory, is has to be suggested, they represent the evolutionary sequence of many galaxies that are classified as a quasar. It is also important to note that these usually contain many super-massive black holes.
# HKDSE Geography/M5/Effectiveness of Farming Technology
## LDCs

* Most farmers lack the education level to apply these technologies
* Underlying problems behind food shortage cannot be eliminated (high population growth, political instability and wars)
* They lack capital to maintain technology use
* It aggravates the LDCs' debt problems
# HKDSE Geography/M5/Farming Inputs in Southern California
## Weather and Climate

Southern California has a Mediterranean climate characterised by hot and dry summers (Apr -> Oct) and warm, humid winters (Nov -> Mar).

### Insolation and Temperature

Insolation and temperature are high in Southern California. Southern California receives an annual temperature of 12 to 32 degrees.
It is hot in summer and warm in winter. This is both because it is located in mid-latitudes with high solar radiation input, and because the lack of cloud cover allows insolation to reach the ground directly without much scattering in the atmosphere.

### Rainfall

Southern California receives scanty and unstable rainfall. The annual rainfall is around 200 to 500 mm. It mainly falls in winter. Annual variation of rainfall is great.
Rainfall decreases from north to south, and from east to west：
* The coastal areas receive much relief rain thanks to the Coast Ranges. However, on the leeward side, the Central Valley receives very little rainfall because it is in the rain shadow.
* The southern tip of California has a subtropical desert climate. Offshore winds remove moisture from the area throughout the year. Thus rainfall is very scarce.

## Land
### Relief

The relief of Southern California is hilly, with the Sierra Nevada and Coast Ranges. However, extensive lowland can be found in the Central and Imperial Valleys, where much of the farming is concentrated.

### Soil

The evaporation rate is very high, so soil moisture is low. Salinisation occurs:
* As the insolation and temperature are high, evaporation rate is high.
* The underground water rises to the earth's surface through capillary action.
* The underground water is evaporated, leaving a hardpan layer of salt crust on the earth's surface. Farming is thus hindered and the soil is thus alkaline.
As there is little vegetation cover in Southern California, the soil fertility is low.

### Drainage

It is mainly drained by the San Joaquin River in the Central Valley and the Colorado River in the Imperial Valley.
# HKDSE Geography/M5/Farming Inputs in the Sahel
## Physical Inputs

| Factor | Characteristics |
| Climate ||
| Sunlight/Insolation | Abundant |
| Temperature | High, AMT 28 C |
| Annual range of temperature | Small, 15 C |
| Wind | Serious |
| Relative humidity | Low |
| Rainfall | Scanty (around 250-500 mm on average) and variable; much seasonal variation |
| Soil ||
| Soil fertility | Low |
| Soil acidity | Alkaline |
| Soil texture | Highly coarse, porous and permeable |
| Soil moisture content | Very low |
| Relief ||
| Altitude | Low |
| Aspect | / |
| Slope gradient | Gentle |
| Drainage ||
| Rivers | Very few; only drained by River Niger and River Nile |
Pastureland is limited since the carry capacity of the land is low.

### Note on climate

* The Sahel has a semi-arid climate.
* Affected by high-pressure belts (subtropical highs), they face sinking air. The air diverges to form offshore winds. There is thus a loss of moisture. High pressure leads to a lack of uprising air and thus scanty rainfall.
* As it is an inland location, it lacks the mediating effect of seawater, so it is very hot in summer. Intense solar radiation creates a high evaporation rate, which reduce soil moisture, hindering crop growth.

## Cultural Inputs

| Factor | Description |
| Infrastructure and amenities | Poor |
| Technology level | Primitive |
| Labour input | Low |
| Education level | Low |
| Transport networks | Poor |
| Market | Nil (Subsistence farming) |
| Capital | Very little |
| Government support | Limited |
# HKDSE Geography/M5

HKDSE Geography
* Objectives
* Living with our physical environment
** M1: Opportunities and Risks
** M2a: Rivers
** M2b: Coasts
* Facing changes in the human environment
** M3: Industry
** M4: Sustainable City
development mutually exclusive?
* Confronting global challenges
** M5: Famines and Agriculture
** M6: Tropical Rainforests
** M7: Global Warming
* Elective modules
** E1: Dynamic Earth
** E2: Climate
** E3: Transport
** E4: Zhujiang Delta

## Guiding Questions

* Why do some regions have surplus food production whereas others are suffering from famine? What is “famine”? Where do most famines occur? What are the similarities found in regions frequently affected by famine?
* What are the factors that affect agricultural production in an area? How do these factors shape the characteristics of farming in an area?
* Where is Sahel? What are the characteristics of its natural environment? What are the agricultural characteristics of nomadic farming in Sahel?
* Where is Southern California? What are the characteristics of its natural environment? What are the agricultural characteristics of irrigation farming in Southern California? Why are agricultural characteristics so varied even in similar natural environmental settings? How true is it to say that human factors are becoming more and more dominant than physical factors in influencing agriculture?
* To what extent can technology help to increase agricultural production and alleviate food shortage? Is genetically modified food a possible way out? Have we really overcome most of the farming constraints imposed by the natural environment? What price do we have to pay for this “success”?
* Is it possible for us to minimise the negative impact of using technology in agriculture, and at the same time produce enough food for everyone?
# HKDSE Geography/M5/Biotechnology
## In MDCs
### Effectiveness

* It can modify crops to become drought-resistant so they require less water for farming and can adapt to local climatic conditions. However, it cannot change climatic conditions or increase water supply.

## In LDCs
### Problems

* The increase in food production depresses food prices. This reduces the farmers' income and makes it harder to accumulate capital for buying patents, pesticides and chemical fertilisers for GM food production. Farmers are often in debt. This pushes farmers to farm more intensively, creating a vicious circle. As the land's carrying capacity is eventually exceeded, environmental degradation occurs.
* Genes may pass to surrounding organisms, creating superbugs and superweeds. Thus the crops are more subject to weeds and pests.
* Monoculture and smaller gene pool makes crops more vulnerable to natural hazards like droughts.

### Why are they unwilling to accept GMOs?

* LDCs think GM food harm their citizens' health
* They have political conflicts with MDCs, think MDCs are just trying to solve their food shortage problem
* They do not wish to rely on food imports and think it is not a long-term or self-sustaining solution
* GMOs cannot really increase food productivity
# HKDSE Geography/M5/Cultural Factors in Agriculture
## Economic Factors

Before proceeding, it is important to note the importance of the law of diminishing marginal returns in agriculture.

### Market
## Institutional Factors
### Land Tenure
## Social Factors
### Culture
## Political Factors
### Political Stability

Wars and conflicts lead to a decrease in food production (CE2006-4aiii):
* People are forced to leave their farmland to become refugees. The labour supply for farming drops.
* Capital is lost.
* Agricultural production facilities, irrigation systems, farmlands, infrastructure and transport are destroyed.
* Resources are drained for military purposes, so less capital is used to develop farming.
All these reduce food production. In addition:
* It is hard for international aid to reach war zones, so emergency food supply is disrupted.
# HKDSE Geography/M5/Introduction to Famines

Map of dietary energy availability per person per day (kcal/person/day) in 2001-2003. :
* no data
* <1600*
* 1600-1800*
* 1800-2000*
* 2000-2200*
* 2200-2400*
* 2400-2600
* 2600-2800
* 2800-3000
* 3000-3200
* 3200-3400
* 3400-3600
* >3600*Insufficient
First, we need to define a few terms.
* Hunger vs. Malnutrition vs. Undernourishment
* Hunger is a condition in which a person's food intake is insufficient to support a productive life. The amount of food intake is measured by dietary energy consumption. The UNFAO suggests 2400 kilocalories of energy per day as a minimum daily energy requirement. Many less developed countries, primarily in Sub-Saharan Africa, do not satisfy this requirement. (See the map above.)
* Malnutrition is a condition when your food intake does not satisfy your nutritional needs. It occurs when you don't have enough of certain nutrients. You can eat a plenty and still suffer from malnutrition if you're eating a balanced diet. A lot of people in Africa do not suffer from hunger, but do suffer from malnutrition. This is because their diets consist mainly of cereals (wheat, maize, rice, etc.) and tubers (potatoes, sweet potatoes, etc.), which provide them with sufficient energy but not vitamins and minerals.
* Undernourishment can be seen as a subset of malnutrition. It is a type of malnutrition caused by insufficient food intake.
* To put it in simpler terms: Hunger is when you aren't eating enough, malnutrition is when you're not eating well, and undernourishment is when you're not eating enough good food.
These two definitions are important and must be remembered by heart:
Note that food supply is made of two components: Local food supply and food imports. In some regions, such as Hong Kong, the local food supply is smaller than the food demand, but there is no food shortage because we have food imports.
# Japanese/Vocabulary/Banking

* Japanese/Vocabulary/Business
* Japanese/Vocabulary/Economy
| Japanese | English | Reading | Notes |
| 口座 | account | こうざ | |
| チェッキング口座 当座預金口座 | checking account | チェッキングこうざ とうざよきんこうざ | |
| 法人口座 | corporate account | ほうじんこうざ | |
| 個人口座 | personal account | こじんこうざ | |
| セービング口座 普通預金口座 | savings account | セービングこうざ ふつうよきんこうざ | |
| 年利 | annual percentage yield (APY) | ねんり | |
| 銀行 | bank | ぎんこう | |
| 信用組合 | credit union | しんようくみあい | |
| 金融機関 | financial institution | きんゆうきかん | |
| 支店 | branch | してん | |
| 定期預金口座 | certificate of deposit (CD) | ていきよきんこうざ | |
| 入金 | deposit | にゅうきん | |
| 入金する | to deposit (to one's own account) | にゅうきんする | |
| 出金 | withdrawal | しゅっきん | |
| 出金する | to withdraw | しゅっきんする | |
| 振込 | electronic funds transfer/wire funds | ふりこみ | |
| 振り込む | to wire/direct deposit (by third-party) | ふりこむ | |
| 口座自動振替 | automatic bill payer | こうざじどうふりかえ | |
| 為替 | money order | かわせ | |
| 小切手 | cheque/check | こぎって | |
| 現金 | cash | げんきん | |
| 紙幣 | banknote | しへい | |
| 硬貨 | coin | こうか | |
| 外貨 | foreign currency | がいか | |
| 外貨両替 | foreign exchange | がいかりょうがえ | |
| 為替レート | exchange rate | かわせれーと | |
| ペイオフ 預金保険制度 | FDIC insurance | ぺいおふ よきんほけんせいど | from the English payoff |
| 利子 | interest paid | りし | |
| 利息 | interest earned | りそく | |
| 口座に利息が付く | an account earns interest | こうざにりそくがつく | |
| 利率 | interest rate | りりつ | |
| 投資 | investment | とうし | |
| 投資する | to invest | とうしする | |
| 株 | stocks | かぶ | |
| 証券取引所 | stock exchange | しょうけんとりひきじょ | |
| 国債 | savings bond | こくさい | |
| 株価 | stock price | かぶか | |
| 株価指数 | stock price index | かぶかしすう | |
# Japanese/Vocabulary/Biology

Associated Vocabulary
| Japanese | English | Reading |
| 生物学 | biology | せいぶつがく |
| 解剖学 | anatomy | かいぼうがく |
| 生化学 | biochemistry | せいかがく |
| 遺伝子突然変異 | gene mutation | いでんしとつぜんへんい |
| 遺伝学 | genetics | いでんがく |
| 遺伝子型 | genotype | いでんしがた |
| 孵卵器 | incubator | ふらんき |
| ペトリ皿 | Petri Dish | ペトリさら |
# Japanese/Vocabulary/Adverbs

| Japanese | English | Reading | Notes |
| 遂に | finally, at last | ついに | |
# Japanese/Vocabulary/Astronomy

| Japanese | English | Reading | Notes |
| 宇宙 | space | うちゅう | Uchū |
| 宇宙飛行士 | astronaut | うちゅうひこうし | Uchū Hikōshi |
| 星, スター | star | ほし, スター | Hoshi, Sutā |
| 星座 | constellation | せいざ | Seiza |
| 惑星 | planet | わくせい | Wakusei |
| 衛星 | satellite / natural sat. | えいせい | Eisei |
| 銀河 | galaxy | ぎんが / ぎんがけい | Ginga, Gingakei |
| 天の川 | Milky Way / Silvery River | あまのがわ | Amanogawa |
| 太陽系 | solar system | たいようけい | Taiyōkei |
| 日, サン | Sun | ひ / たいよう, サン | Hi, Taiyō, San |
| 月, ムーン | Moon | つき, ムーン | Tsuki, Mūn |
| 水星 | Mercury | すいせい | Suisei |
| 金星 | Venus | きんせい | Kinsei |
| 地球 | Earth | ちきゅう | Chikyū |
| 火星 | Mars | かせい | Kasei |
| 木星 | Jupiter | もくせい | Mokusei |
| 土星 | Saturn | どせい | Dosei |
| 天王星 | Uranus | てんのうせい | Tennōsei |
| 海王星 | Neptune | かいおうせい | Kaiōsei |
| 冥王星 | Pluto | めいおうせい | Meiōsei |
| 彗星 | comet | すいせい | Suisei |
| 銀河系 | Galaxy | ぎんがけい | Gingakei |
| 天体 | Celestial body | てんたい | Tentai |
| 恒星 | star | こうせい | Kōsei |
| 小惑星 | asteroid | しょうわくせい | Shōwakusei |
| 軌道 | orbit | きどう | Kidō |
| ハレー彗星 | Halley's Comet | ハレーすいせい | Harē Suisei |
| 流星 | meteor | りゅうせい | Ryūsei |
| 流星群 | meteor shower | りゅうせいぐん | Ryūseigun |
| 隕石 | meteorite | いんせき | Inseki |
# Japanese/Vocabulary/Aviation

| Japanese | English | Reading |
| 航空 | aviation | こうくう |
| 航空機 | aircraft | こうくうき |
| 飛行機 | airplane, aeroplane | ひこうき |
| ヘリコプター | helicopter | |
| 飛行船 | airship | ひこうせん |
| 熱気球 | hot-air balloon | ねつききゅう |
| 空港、飛行場 | airport, airfield, airstrip | くうこう、ひこうじょう |
| 滑走路 | runway | かっそうろ |
| パイロット | pilot, aviator | |
| 旅客機 | airliner | りょかっき、りょかくき |
| 輸送機 | cargo aircraft, freight aircraft | ゆそうき |
| 戦闘機 | fighter | せんとうき |
| 爆撃機 | bomber | ばくげきき |
# Japanese/Vocabulary/Body parts

| Japanese | English | Reading | Notes |
| 体 胴 | body | からだ どう | |
| 頭 | head | あたま | |

## Head

| Japanese | English | Reading |
| 髪/髪の毛 | hair | かみ/かみのけ |
| 顔 | face | かお |
| 額 | forehead | ひたい |
| 眉 | eyebrow | まゆ |
| 睫毛 | eyelash | まつげ |
| 目 | eye | め |
| 鼻 | nose | はな |
| 口 | mouth | くち |
| 唇 | lips | くちびる |
| 舌 | tongue | した |
| 歯 | teeth | は |
| 顳顬 | temple | こめかみ |
| 歯茎 | gums | はぐき |
| 頬 or 頰 | cheek | ほほ or ほお |
| 顎 | chin | あご |
| 耳 | ear | みみ |
| 首 | neck | くび |
| 喉 | throat | のど |

## Torso

| Japanese | English | Reading | Notes |
| 肩 | shoulder | かた | |
| 胸 | chest, breast | むね | |
| 背中 | back | せなか | |
| 臍 | navel, bellybutton | へそ | |
| 腰 | hips, waist, lower back | こし | |
| お腹 腹 | belly | おなか はら | お腹 (おなか) is more polite |
| お尻* 尻 | buttocks | おしり しり けつ | お尻 (おしり) is more polite |

## Limbs

| Japanese | English | Reading |
| 膝 | lap, knee | ひざ |
| 腕 | arm | うで |
| 肘 | elbow | ひじ |
| 手首 | wrist | てくび |
| 手 | hand | て |
| 指 | finger | ゆび |
| 親指 | thumb | おやゆび |
| 爪 | nail (finger or toe) | つめ |
| 脚 | leg | あし |
| 足首 | ankle | あしくび |
| 足 | foot, feet | あし |
| 踵 | heel | かかと |
| 足の指 足指 | toes | あしのゆび あしゆび |

## Fingers

| Japanese | English | Reading |
| 親指 | Thumb | おやゆび |
| 人差し指 | Index Finger | ひとさしゆび |
| 中指 | Middle Finger | なかゆび |
| 薬指 | Ring Finger | くすりゆび |
| 小指 | Little Finger | こゆび |
| 指先 | Fingertip | ゆびさき |

## Organs and tissue

| Japanese | English | Reading |
| 膀胱 | bladder | ぼうこう |
| 血 血液 | blood | ち けつえき |
| 骨 | bone | ほね |
| 骨髄 | bone marrow | こつずい |
| 脳 | brain | のう |
| 軟骨 | cartilage | なんこつ |
| 食道 | esophagus | しょくどう |
| 胆嚢 | gallbladder | たんのう |
| 心臓 | heart | しんぞう |
| 腸 | intestines | ちょう |
| 腎臓 | kidney | じんぞう |
| 喉頭 | larynx | こうとう |
| 肝臓 | liver | かんぞう |
| 肺臓 | lung | はいぞう |
| 筋肉 | muscle | きんにく |
| 膵臓 | pancreas | すいぞう |
| 咽頭 | pharynx | いんとう |
| 肌 | skin | はだ |
| 脾臓 | spleen | ひぞう |
| 胃 | stomach | い |
| 気管 | windpipe | きかん |
* 「お」 adds politeness here
# Japanese/Vocabulary/Buildings

| Japanese | English | Reading |
| 壁 | wall | かべ |
| 高校 | high school | こうこう |
| 工場 | factory | こうじょう |
| 講堂 | auditorium | こうどう |
| 教会 | church | きょうかい |
| 銀行 | bank | ぎんこう |
| 空港 | airport | くうこう |
| 事務所 | office | じむしょ |
| 寺 | temple | てら |
| デパート | department store | |
| 動物園 | zoo | どうぶつえん |
| 博物館 | museum | はくぶつかん |
| 美術館 | art gallery, art museum | びじゅつかん |
| ビル | building | |
| 港 | harbor, port | みなと |
| 旅館 | Japanese hotel | りょかん |
# Japanese/Vocabulary/Business

* Japanese/Vocabulary/Banking
* Japanese/Vocabulary/Economy
| Japanese | English | Reading |
| 商売 | business | しょうばい |
| 経済 | economics | けいざい |
| 名刺 | business card, name card | めいし |
| ミクロ経済学 | microeconomics | ミクロけいざいがく |
| マクロ経済学 | macroeconomics | マクロけいざいがく |
| 失業 | unemployment | しつぎょう |
| 金融 | finance | きんゆう |
| 会計 | accounting | かいけい |
| 証券取引所 | stock exchange | しょうけんとりひきじょ |
| 資本 | capital | しほん |
| 投資 | investment | とうし |
| 株主 | shareholder | かぶぬし |
| 社長 | president | しゃちょう |
# Japanese/Vocabulary/Chemistry

| Japanese | English | Reading |
| 化学 | chemistry | かがく |
| 元素 | chemical element | げんそ |
| 固体 | solid | こたい |
| 液体 | liquid | えきたい |
| 気体 | gas | きたい |
| 原子 | atom | げんし |
| 陽子 | proton | ようし |
| 中性子 | neutron | ちゅうせいし |
| 電子 | electron | でんし |
| イオン | ion | いおん |
# Haxorware Modem Firmware/Web Shell

Any Shell commands can be entered here. These are generally commands you might use when at a file system shell (such as telnet) without having to open an actual session.
# Health Informatics

Health Informatics (HI) is the academic field or profession of 1) applying computers to medicine and 2) studying and developing theories of information, knowledge and thought processes of the practitioner-users, that is the cognitive science and cognitive engineering of physicians, nurses and all users of these information devices.
HI is deeply rooted in translational science, a cross-disciplinary practice of analyzing datasets derived from clinic records and clinical research data and translating the results into future decision-making in many health-related disciplines, including clinical practice, clinical research, computer science and engineering, human-computer interaction (HCI), cognitive science, psychology and others.
HI covers a spectrum from applications (getting something to work) to theory (studying how it works or why it doesn't).
There are many special interests within HI which match up with the many particular specialties in medicine, such as nursing, radiology, imaging, laboratory medicine (pathology) as well as emergency medicine.

## External Links

* AMIA Principal professional organization of general health informatics.
* NCEMI National Center of Emergency Medicine Informatics - Excellent Emergency Medicine stuff -
* eMedicine/emerg eMedicine Online Textbook of Emergency Medicine
* Traditional Textbook format Online Emergency Medicine Text
* (and many other medical texts now)
* authored, controlled content chapters, look like traditional textbook chapters, but online and free
# Health Sociology/Childhood
## Technology and children

* Video: Bridle, J (2018). The nightmare videos of childrens' YouTube — and what's wrong with the internet today. TED.