Notes, summaries, assignments, exams, and problems for Primary education

Understanding Computer Networks

A computer network is a set of computers connected to each other, enabling them to share resources and exchange information. They can share printers, files, folders, and Internet connections.

Ethernet Classification

The two common types of Ethernet networks are 100Base-T and 1000Base-T.

The number indicates the transmission speed in Megabits per second: 100Mbps and 1000Mbps, respectively.

The letter 'T' indicates the type of cable used to transmit data. The cable consists of twisted pairs of copper wire with RJ45 connectors at each end. These cables are used to connect the network.

Types of Cables

• Twisted Pair UTP: 8 copper wires twisted together in 4 pairs with an RJ45 connector at the end.
• STP: A safer cable for transmitting

1. The Russian Revolution

1.1. Causes of the Revolution

At the beginning of the 20th century, Russia was a vast empire ruled by the Tsar of the Romanov dynasty. Social discontent was brewing among the middle and working classes due to the autocratic government, where the Tsar held absolute power. The stark economic disparity between the wealthy minority and the rest of the population further fueled tensions, culminating in the Revolution of 1905. This forced the Tsar to accept a parliament (Duma) and implement various reforms. However, the autocratic system persisted.

1.2. The Revolutions of 1917

The revolutions of 1917 were triggered by two main factors: the immense casualties suffered during World War I and the ongoing social and economic inequalities.... Continue reading "The Russian Revolution: From Tsarist Rule to Soviet Power" »

CHAPTER 1

4) To participate in a supply chain, a firm must actually handle the physical goods at some point.

7) Inputs to the transformation process are tangible, but the outputs may be tangible or intangible.

9) Of the three flows linking organizations in a supply chain, information and monetary flows always move upstream and physical flows always move downstream.

10) A second-tier supplier is downstream from a first-tier supplier in the supply chain.

13) The drive for efficiency has decreased the level of globalization in the world economy over the last twenty years.

14) E-commerce is the component of a supply chain that is the most susceptible to breakdown.

15) To avoid supply chain problems, firms must manage relationships with their downstream... Continue reading "Key Concepts in Supply Chain and Operations Management" »

NUMERO QUATTRO: HT Family History

Contains the health condition of parents (grandparents), siblings and children of the patient; no wife/husband. Have to note the occurrence of inheritable diseases: haemophilia, spherocytosis, DM, hypertension, cancer, “obesity”?. Draw family tree and mark affected people, we can localize if the disease is dominant, recessive and linked to sex chromosome X. Examination of chest.

INSPECTION:

SHAPE: Barrel chest (expiration prolonged, difficult), Pigeon breast (protruding breast bone, common in rickets), Funnel breast (inward deformity of sternum), Kyphoscoliosis (curvature of the spine, common in childhood rickets, can compromise ventilation), general deformities (due to chronic pulmonary and pleural diseases... Continue reading "Family History, Chest Examination, and Cardiac Diseases" »

Conditional Sentences

First Conditional

Expresses a possible condition and its probable result.

Form: (If/Unless + Present Simple) + (will + infinitive)

Examples:

• If she trains hard, she will get fit.
• Unless she trains hard, she won't get fit.
• She will get fit if she trains hard.

Second Conditional

Expresses a hypothetical condition and its probable result.

Form: (if + Past Simple) + (would + infinitive)

Example:

• If I won the lottery, you wouldn't see me again.

Third Conditional

Expresses an unreal past condition and its probable past result.

Form: (If + Past Perfect) + (would have + past participle)

Example:

• If she had taken the drug, she would have gotten a better mark.

Vocabulary

Values

• Go without: Do without something
• Have a big heart: Be kind and generous
• Let

Sports Vocabulary and Phrases

Competitions

• Be disqualified
• Be knocked out
• Boo off
• Carry on
• Champion
• Championship
• Cheer on
• Competition
• Competitor
• Crowd
• Diver (saltador)
• Drop out
• Endurance
• Event
• Final
• Get through to
• Give up
• League title
• Participant
• Qualify
• Race
• Rider
• Sign up
• Spectator
• Stadium
• Stamina
• Supporter
• Take part in
• Team
• Teammate
• Tournament

Fitness

• Chase (atrapar)
• Climb up/along
• Crawl
• Cross over
• Dive into
• Get over (superar)
• Jog round (correr al voltant de)
• Jump (into, over, out, across)
• March (desfilar)
• Ski
• Skip
• Swim through
• Walk over

Fitness Goals

• Become a member
• Bulk up (fer múscul)
• Enroll in (apuntar-se)
• Enter a competition
• Feel unwell
• Get into shape (posar-se en forma)
• Get together (trobar-se)
• Give up
• Go on a diet
• Join (a gym)
• Keep fit (estar en forma)
• Lose weight (perdre pes)
• Make an appointment

The Interwar Period: Prosperity and Depression

The Roaring Twenties

After World War I, a period of economic prosperity emerged. The USA became one of the most prosperous countries and the first world superpower. This economic growth was based on:

• The development of industry: Due to the success of mass production and chain production.
• An increase in consumption: Promoted by advertising, credit, and hire purchase.
• Investments in stocks and shares: Banks, companies, and private individuals invested their capital in stocks, which increased their value.

The Crash of 1929

On October 24, 1929, “Black Thursday,” the stock exchange market collapsed. Investors panicked and tried to sell their stocks, which started the economic crisis of the 1930s.

Reason:

Redi's Experiment
1668, Francesco Redi demonstrated that the maggots found in rotting meat came from fly’s eggs
1.     Redi placed pieces of meat in the same jars
2.     The first he left open, the second one he covered with some fabric and the third he covered with a cork
3.     The three jars were left in the same place and after a few days he saw that there were maggots in the first two jars but not the third one

Pasteur’s Experiment
Louis Pasteur demonstrated that microorganisms were not created from spontaneous generation.
1.     Pasteur placed meat soup in two flasks and bent their neck into an S-shape
2.     He sterilised the liquid by heating it and after two weeks saw that it didn’t decompose
3.     He

Set Cover to Efficient Recruiting

Input: Set U of elements, collection S₁, ..., S_m of subsets of U, integer k ≥ 0

Construct an instance of the Efficient Recruitment Problem:

• Sports are represented by U.
• Applicants are represented by {1, ..., m}.
• For every s ∈ U and 1 ≤ i ≤ m, M[s, i] = 'qualified' if s ∈ S_i and 'not qualified' otherwise.

Steps:

1. Call the oracle for Efficient Recruiting with input M and k.
2. Return the result (yes or no) of the previous call.

Vertex Cover and Hitting Set

Graph: G = (V, E)

• U = V(G)
• S_i = {u, v}, where (u, v) is an edge of G.

Vertex Cover ⇒ Hitting Set:

If C is a vertex cover for G of size k, then by definition, for every edge (u, v) in G, either u ∈ C or v ∈ C. Therefore, C is a solution for Hitting Set because... Continue reading "Efficient Recruiting and Algorithm Design: Set Cover, Hamiltonian Path, and Longest Increasing Subsequence" »

A Virtuous Individual

An individual who I considered to be virtuous is my best friend, Reid Bartholomew. Reid would always look out for everyone around him, friends, and family. The Golden Mean is the midpoint between two extremes, which are known as deficiency and excess. Where the golden mean lies between the vices depends on the situation. For example, courage could be considered the golden mean while cowardice is a deficiency and recklessness is an excess.

In Aristotle’s virtue ethics, he provided three conditions for authentic moral actions.

1. The subject knows well what he is doing. For instance, Reid had planned on completing all his homework for one day so he would have more time to study for his midterms the next day.
2. The subject does