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

Timeè t1 t2 t3 t4

checkpoint checkpoint checkpoint system crash

2.1 Describe the recovery needed according to the RDU (Recovery using Deferred Update) algorithm. You must indicate which transactions need to be undone/redone and which are ignored and need to be restarted. (2.5 points)

T4 and T5 are ignored because they did not reach their commit points. They need to be restarted.

T2 must be REDONE because it was committed after the last checkpoint.

2.2 Repeat the previous question using the RIU (Recovery using Immediate Update) algorithm. (2.5 points)

T4 and T5 are UNDONE because they did not reach their commit points and need to be restarted.

T2 must be REDONE because it was committed after the last checkpoint.

Contra Descartes and Kant, the cogito cannot be aware of anything let alone itself without the recognition of its own existence in the gaze of the other. “I cannot obtain any truth

3. TOTALITARIAN REGIMES: FASCISM AND NAZISM
The interwar period saw the rise of totalitarian regimes in several states, fueled by economic, ideological, and political crises.

Characteristics of Totalitarianism

Totalitarian regimes share several key characteristics:

• Authoritarian Regime:
  • Charismatic leader with unlimited power, often seen as infallible. Examples include Adolf Hitler (Führer) and Benito Mussolini (Il Duce).
  • Lack of freedom or political plurality, with a single political party dominating.
  • Opposition suppressed through repression and violence, often by paramilitary forces or political police.
• Economic and Social Control:
  • The state controls the economy, often with anti-capitalist and anti-communist policies.
  • Society is manipulated through

Economic Sectors

Economic activities can be categorized into three main sectors: primary, secondary, and tertiary. Let's explore each sector in detail:

1. Primary Sector

The primary sector involves the extraction and production of raw materials from the earth. This sector forms the foundation for all other economic activities. Examples of primary sector activities include:

• Farming
• Fishing
• Forestry
• Mining

2. Secondary Sector

The secondary sector encompasses activities that transform raw materials into finished or semi-finished goods. This sector is closely associated with industrial activity. Examples of secondary sector activities include:

• Manufacturing sugar from sugarcane
• Producing bricks from earth for construction

3. Tertiary Sector

The tertiary sector,... Continue reading "Understanding Economic Sectors: Primary, Secondary, and Tertiary" »

What is Surface Engineering?

Definition: It is the sub-discipline of material science which deals with the surface of solid matter.

Objectives: Involves altering the properties of the surface phase to reduce degradation over time, making it robust to the environment.

Applications: Automotive, aerospace, missile, power, electronic, biomedical, textile, petroleum, chemical, steel, power. Used in almost all types of materials.

Describe SEM and TEM

SEM: Scanning Electron Microscopy images the sample surface by scanning it with a high-energy beam of electrons. Advantages include 3D imaging and greater depth of focus. Disadvantages include low resolution and expensive equipment. Applications include gunshot residue analysis and firearms identification.... Continue reading "Surface Engineering and Microscopy Techniques in Material Science" »

Thigh, Groin, and Hip Conditions

Hip Dysplasia

Abnormal articulation between the femoral head and acetabulum. Often associated with an irregularly developed pelvis; coxa vara/valga. Can cause pain leading to hip subluxation or dislocation. May be congenital or developmental (DDH).

Risk factors:

• Being female
• Firstborn
• Born breech
• Family history of hip dysplasia
• Swaddling

Quad Contusion

Mechanism of Injury (MOI): Direct blow to thigh musculature.

• Grade 1: Superficial intramuscular bruise that produces mild hemorrhage.
• Grade 2: Deeper intramuscular bruise.
• Grade 3: Moderate intramuscular bruise.
• Grade 4: Deep intramuscular bruise that may split the fascia latae, allowing the muscle to protrude (muscle herniation).

Potential complication: Myositis ossificans.... Continue reading "Common Hip, Groin, and Thigh Injuries" »

The Second World War (I)

The Combatants

On September 1, 1939, World War II began after Germany invaded Poland. The conflict lasted for almost six years, ending on August 5, 1945. Nations at war were divided into two groups: The Allies, led by France and the United Kingdom, and The Axis Powers, led by Germany and Italy.

The Causes of the War

Several factors contributed to the outbreak of World War II:

• Germany's desire for revenge after the humiliation suffered at the Treaty of Versailles.
• Economic depression.
• The rise of totalitarian regimes.
• Imperialist and militaristic policies: Japan invaded Manchuria (1932), Italy annexed Abyssinia (1935) and Albania (1939), and Germany, claiming territories of German population, annexed Austria (1938) and the Sudetenland,

Essential Characteristics

1. Incorporation

   The rights are tied to the writing. The instrument contains a right given by the document. Possession of the writing evidences the right.

2. Legitimation

   The person holding the instrument has the power to demand payment of the credit within.

3. Accuracy

   The terms of the instrument cannot be modified or amended from the moment of its creation.

4. What is accurately written in the text of the instrument becomes the right.

5. Autonomy

   The instrument is born when it is drafted and negotiated by its original maker.

   1. There is a personal relationship between the maker and the first holder. This repeats as it transfers from one hand to another.

   2. The instrument becomes more abstract, autonomous and independent from the reasons it was

) Hypotheses, Type I and Type II Errors, and Statistical Tests

For each of the following tests, state the hypotheses, identify if it is a right-, left-, or two-tailed test and write Type I Error and Type II Error pertaining to the problem.

1. a) A professor of statistics states that the average student spends 3 hours studying for the midterm exam. Ho: μ = 3 vs. Ha: μ ≠ 3 Two-tailed test Type I Error: Concluding the average student doesn’t study 3 hours for midterm when in fact that is false. Type II Error: Not concluding the average student doesn’t study 3 hours for midterm when in fact that is true.
2. b) A spouse stated that the average amount of money spent on Christmas gifts for immediate family members is above $1,200. Ho: μ = 1200 (or