Notes, summaries, assignments, exams, and problems for Baccalaureate

External Anatomy of the Perch

• 1. Head: Structurally supportive and protective.
• 2. Eye: Visual stimuli.
• 3. Nares: Avenue for water to enter the oral cavity.
• 4. Mouth: Made up of the mandible and maxilla.
• 5. Operculum: Covers and protects soft gills.
• 6. Pectoral fin: Used like paddles; assist in direction change.
• 7. Anterior dorsal fin: Serves as a rudder for stability.
• 8. Posterior dorsal fin: Supported by rays; serves as a rudder for stability.
• 9. Caudal fin: Propels the fish through the water.
• 10. Pelvic fin: Assists in stability when swimming.
• 11. Anal fin: Assists in stability when swimming.
• 12. Lateral line: Sensory organ that allows the perch to detect changes in pressure, movement, and vibration.

Internal Skeletal and Sensory Structures

• 13. Gills:

Common English Idioms and Phrases

Here are some of the most common English idioms and phrases that will enrich your English vocabulary and make you sound like a native speaker.

1. ‘The Best of Both Worlds’

Means you can enjoy two different opportunities at the same time.

Example: “By working part-time and looking after her kids two days a week she managed to get the best of both worlds.”

2. ‘Speak of the Devil’

This means that the person you’re just talking about actually appears at that moment.

Example: “Hi Tom, speak of the devil, I was just telling Sara about your new car.”

3. ‘See Eye to Eye’

This means agreeing with someone.

Example: “They finally saw eye to eye on the business deal.”

4. ‘Once in a Blue Moon’

An event... Continue reading "25 Common English Idioms and Phrases to Sound Like a Native" »

Application Software

System Software

Operating System

Why OS?

Operating System Function

OS Goals

Types of Operating Systems

• Single Process Operating System
• Batch-Processing Operating System
• Multiprogramming Operating System
• Multitasking Operating System
• Multi-Processing Operating System
• Distributed System
• Real Time OS

Program

Process

Thread

Multi-tasking vs Multi-Threading

Thread Scheduling

Thread Context Switching vs Process Context Switching

User Space

Kernel

Functions of Kernel

• Process Management
• Memory Management
• File Management
• I/O Management

Type Of Kernel

• Monolithic
• Micro
• Hybrid
• Nano

System Calls

Types

• Process Management
• Device Management
• File Management
• Information Management
• Communication Management

Firmware: SW embedded in HW (microprocessor -> microcontroller)

What

What If Everyone Did It? (Immanuel Kant)

• If you help because it hurts you, it is not a moral action.
• Morality depends on what you do and why you do it.
• You should never lie.
• We all have an absolute duty to tell the truth → Categorical imperative (order).
• We act on the basis of “maxims”. For something to be moral, it must be applicable to everyone (maxims applicable in all cases).
• Always ask yourself the question of what if everyone did it?

Such Practice (Jeremy Bentham)

• Panopticon (a machine to make rogues honest).
• Utilitarianism or the Principle of Greatest Happiness → It consists of the idea that what is correct is what produces the greatest happiness.
• Happiness is pleasure and absence of pain. We seek pleasurable experiences and avoid painful

Room to Grow (John Stuart Mill)

- He was a genius, raised on utilitarianism.

- There are different types of pleasure, and some are better than others.

- Anyone who has experienced high and low pleasures prefers the high.

- Paternalism: Forcing someone to do something for their good (acceptable only in children).

- The Harm Principle: Every adult should be free to live as they want as long as they do not harm anyone.

- The more freedom, the happier.

Unintelligent Design (Charles Darwin)

- Everyone has apes in their family tree; we are part of nature.

- His theory explains how human beings, plants, and animals have come to be what they are and how they are still changing.

- You cannot be a Darwinian and also believe that God created all species as they... Continue reading "Philosophical Insights: Mill to Freud" »

Learning from Mistakes: Popper and Kuhn

Science progresses not by proving theories right, but by recognizing when our understanding of reality is false. Scientists actively try to disprove their theories.

• Induction: If you observe that it rains every Thursday for four weeks, you might conclude that it always rains on Thursdays.
• Science aims to avoid the problem of induction.
• Scientists propose a hypothesis and then test it, seeking evidence that could falsify it. If falsified, the hypothesis is rejected.
• Kuhn: Argued that there are no objective facts waiting to be discovered. Progress occurs through "paradigm shifts," where existing frameworks of thought are overturned.

The Runaway Train and the Unwanted Fiddler

These thought experiments by Philippa... Continue reading "Key Philosophical Concepts: From Popper to Singer" »

Bertrand Russell: The King of France Paradox

• Russell's philosophical inquiries often explored the limits of language and logic.
• He posited that certain statements, like "God cannot save humanity. He does not exist," reflect a particular stance on metaphysical claims.
• Russell also considered situations where "fighting is the best possible option" under exceptional circumstances.
• A paradox is a statement that appears to be true and false at the same time.
• The famous proposition, "The current King of France is bald," is considered false because there is no King of France today. This illustrates Russell's theory of definite descriptions and the problem of non-referring terms in logic.

A.J. Ayer: Verificationism and Emotivism

• A.J. Ayer, a prominent logical

Probability Fundamentals

• Mutually Exclusive Events: If A and B are mutually exclusive, then P(A ∪ B) ≠ 0.
• Independent Events: Events are independent if their probabilities match, such as P(A) = P(B) or P(A|B) = P(A).
• Conditional Probability Example: Find P(driver is age 65+ | driver is female) = P(driver is female and 65+) / P(driver is female).
• Key Formulas:
  • P(S ∩ Y) = P(S ∩ Y) / Total
  • P(S|Y) = P(S ∩ Y) / P(Y)
  • P(Y ∪ S) = P(Y) + P(S) - P(Y ∩ S)

Probability Distributions

Expected Value Calculation

The payoff (X) for a lottery game has the following probability distribution. What is the expected value of X? (Hint: Find the value of 'a' first.)

Given values: 2 (0.4), 5 (0.3), 7 (0.2), 10 (a).
Calculation: 1 - (0.4 + 0.3 + 0.2) = 0.1, so a =... Continue reading "Probability and Statistics Practice Problems and Solutions" »

Phrasal Verbs List

Section 4

• Beat up: dar una paliza
• Break in: robo
• Come forward: ofrecer ayuda
• Get away with: liderazgo
• Hold up: atracar
• Let off: no castigo
• Make for: ir a otro sitio
• Turn in: chivar

Section 5

• Check out: revisar
• Knock out: eliminar
• Listen out for: escuchar con atención
• Make out: distinguir
• Mind out: tener cuidado
• Pull out: retirarse por problema
• Stand out: destacar (positivo)
• Stick out: destacar (negativo)

Section 6

• Burn out: estar quemado
• Copy in: copiar
• Fill in for: sustituir
• Get ahead: ascender
• Key in: escribir en ordenador
• Lay off: despedir
• Take on: contratar
• Work up: ascender progresivamente

Word Formation

• Depth, deep, deepen, deeply
• Fortune, fortunate, fortunately
• Popularity, popular, popularise, popularly
• Significance, significant, signify, insignificantly
• Desire,

Network Protocols (नेटवर्क प्रोटोकॉल)

Frame Relay क्या है? (What is Frame Relay in Hindi)

Frame Relay एक तेज गति का packet switching प्रोटोकॉल है जिसका प्रयोग Wide Area Networks (WANs) में किया जाता है। इसके अलावा, यह दो या दो से अधिक Local Area Networks (LANs) के बीच data को transfer करता है।

Frame Relay एक packet switched टेक्नोलॉजी है। इसे Local Area Networks के बीच कम खर्च में data transfer करने के लिए design किया गया था। साथ ही,... Continue reading "Frame Relay क्या है? फायदे और नुकसान (हिंदी में पूरी जानकारी)" »