Notes, summaries, assignments, exams, and problems

Performance Metrics

• Elapsed Time: Represents overall system performance. It is the total time taken to complete a task.
• User CPU Time: Indicates CPU performance. It is the time the task actively runs on the CPU, excluding idle time.
• CPU Time: The time the CPU spends executing instructions, either from the task or the operating system, excluding idle time.
• Clock Speed: 1 MHz equals 1 million clock cycles per second. 1 GHz equals 1 billion clock cycles per second.
• Response Time: Equivalent to execution time.
• Throughput: Equivalent to bandwidth.
• Performance Comparison: (PerfA) / (PerfB) = (ExecTimeB) / (ExecTimeA) = n

Impact of Processor Upgrades

• Replacing a processor with a faster one decreases response time and increases throughput.
• Adding an additional

Maxillary Radiolucent Landmarks

• Intermaxillary Suture (Incisor Region)

  Appears radiolucent (RL) with a radiopaque (RO) border. Often misinterpreted as a fracture; however, true fractures are irregular and lack a radiopaque border. Located at the midline between the two premaxillae.

• Nasal Fossa (Incisor & Canine Region)

  A pear-shaped radiolucency. Visible in the canine, incisor, and posterior regions.

• Incisive Foramen (Incisor Region)

  A radiolucency located at the midline of the palate, behind the central incisors. Differential Diagnosis: Consider an incisive canal cyst if its size exceeds 1 cm.

• Lateral Fossa (Canine Region)

  A depression appearing as a radiolucency near the canine and lateral incisor.

• Nasolacrimal Canal

  Appears radiolucent, located

Reported Speech

Types of Reported Speech

Yes/No Questions

Structure: S + reporting verb + if/whether + S + past tense verb

Example: He asked if he was late.

Wh- Questions

Structure: S + reporting verb + wh-word + S + past tense verb

Example: He asked where he had left his keys.

Orders and Requests

Structure: S + reporting verb + object + (not) + to + infinitive

Note: Use "told" for orders.

Example: He told me to be quiet.

Suggestions

Structure 1: S + suggest (tense) + (not) + verb-ing

Structure 2: S + suggest + that + S + should + infinitive

Example: She suggested going for a walk.

Reporting Verbs

Verbs followed by "to + infinitive"

Examples: agree, offer, refuse, promise, threaten

Example: We agreed not to buy a car.

Additional verbs with object: advise, invite,... Continue reading "Reported Speech: A Comprehensive Guide with Examples" »

English Grammar

Verb Tenses

Past Tense Transformations

• Present Simple (eats/eat) → Past Simple (ate)
• Don't/Doesn't → Didn't
• Present Continuous (am, is, are + v ing) → Past Continuous (was, were + v ing)
• Past Simple (-ed or irregular) → Past Perfect (had + past participle)
• Present Perfect (have, has + past participle) → Past Perfect
• Past Perfect (had + past participle) → Past Perfect
• Past Continuous (was, were + v ing) → Past Perfect Continuous (had + been + v ing)
• Present Perfect Continuous → Past Perfect Continuous
• Past Perfect Continuous → Past Perfect Continuous
• Future: Will + infinitive → Would + infinitive
• Can → Could + infinitive
• Must/Have to → Had to + infinitive
• May → Might + infinitive

Changes in Reported Speech

• Now → Then
• Today

The Reign of Charles IV (1788–1808)

• Charles III died, and Charles IV inherited the throne, marking the beginning of a period influenced by the French Revolution.
• Frontiers were blocked, and Enlightenment reforms ended due to fear of the revolutionary wave spreading from France.
• Following the execution of Louis XVI, Spain and France started a war, which ended with the Treaty of Basel (1795). Spain ceded its part of Hispaniola to France, while Gipuzkoa was returned to Spain.
• Manuel Godoy and Napoleon signed the Treaty of Fontainebleau (1807): an alliance to invade Portugal. However, invading Spain was also part of the French plans.
• The Aranjuez Mutiny (1808): A popular uprising against Godoy, supported by Ferdinand, the heir to the throne. This

1. What are the innermost layers of Earth?

The inner core is the innermost physical layer of the Earth. The core is the innermost chemical layer.

2. What evidence indicates that the outer core is liquid?

Evidence from earthquake waves indicates that the outer core is liquid.

3. How does Earth generate a magnetic field?

It surrounds Earth.

4. Compare the lithosphere and the asthenosphere

The lithosphere is a rigid layer. The asthenosphere is a plastic layer.

5. How is the crust different from the mantle?

The mantle has more iron. The crust is less dense than the mantle.

6. What are the four layers of the mantle?

• Lithosphere
• Asthenosphere
• Uppermost mantle
• Lower mantle

7. Which layer of the mantle has the greatest pressure? Explain

The lower mantle because pressure... Continue reading "Earth's Layers and Systems: Composition and Properties" »

Settler Societies and Racial Terms

• US & Canada: British colonized, predominantly white settler societies.
• Australia & New Zealand: Predominantly white settler societies.
• Argentina & Uruguay: Spanish colonized, predominantly white settler societies.
• Mestizo: "Mixed"; a racial category produced by Europeans and Indigenous peoples.
• Mulatto: Mixed Black and white.

Language Development and Contact

• Creole: A cultural process tracing back to Pidgins.
• Pidgin: A contact language formed when two groups who do not speak the same language come into contact. It mixes elements of both languages, often with the less powerful group providing basic words and the more powerful group providing larger/longer words.
• Lingua Franca: A language taken from one's

Steps in Root End Surgery

• Local anesthesia and hemostasis
• Management of soft tissue
• Management of hard tissue
• Surgical access (visual and operative)
• Access to root structure
• Periradicular curettage
• Root end resection
• Root end preparation
• Root end filling
• Soft tissue repositioning and suturing
• Post-surgical care

Root End Preparation

Preparing a cavity to receive root end filling.

According to Carr and Bentkover, this involves a Class I preparation at least 3mm into root dentin with walls parallel to and coincident with the anatomic outline of the pulp space.

Key requirements:

1. The apical 3mm of the root canal must be freshly cleaned and shaped.
2. The preparation must be parallel to and coincident with the anatomic outline of the pulp space.
3. Adequate retention form

Macrostructure

Theme: This is the topic sentence that summarizes the main idea. Usually at the beginning.

Rheme: Arguments that support the theme. In the middle.

Thesis Statement: Restatement of the initial idea. Normally at the end.

Microstructure

Lexicon

• Formal or informal language (e.g., Provides, expand).
• Attributive adjectives such as “logically and psychologically satisfying conclusion”.
• Semantic fields (Campos semánticos).
• Elements that are not formal (Common words like 'too' instead of 'moreover'; 'quite' similar). The combination of formal register with more accessible language suggests that this is an informative text.
• Main statements (topic sentences and thesis statements) use the copulative verb 'to be' which indicates that the statement