Notes, abstracts, papers, exams and problems of Baccalaureate

ELECTRICAL INSTALLATIONS:
The electricity used to meet our energy needs (housing, buildings and industries) But there are serious dangers such as fires and electrocucions if facilities do not meet the appropriate security.
Low Voltage Electrotechnical Regulations (REBT) technical conditions and guarantees must be met by electrical installations connected to a low voltage supply in order to:
-Preserve the safety of persons and property.
-Ensure the normal operation of these facilities and prevent disruptions that could cause other facilities and prevent disruptions that could cause other facilities and services.
-Contribute to the technical reliability and efficiency of economic facilities.
Complementary technical instructions (ITC - BT)... Continue reading "Domestic Electrical Installations" »

Chhatrapati Shivaji Maharaj (1630-1680)

Chhatrapati Shivaji Maharaj (1630-1680) was a renowned Indian warrior king and the founder of the Maratha Empire in western India. He is celebrated for his valor, strategic military tactics, and administrative prowess. Here are some key highlights of his life and legacy:

Early Life

Born on February 19, 1630, in the Shivneri Fort, near Pune, to Shahaji Bhosale and Jijabai, Shivaji was deeply influenced by his mother and his tutor, Dadaji Kondadev. His upbringing instilled a strong sense of justice and a desire for independence.

Military Achievements

Shivaji is known for his guerrilla warfare tactics and successfully challenging the mighty Mughal Empire and other regional powers like the Adil Shahi Sultanate.... Continue reading "Chhatrapati Shivaji Maharaj: Founder of the Maratha Empire" »

Cloud Computing Essentials

What is a Distributed File System (DFS)?

A distributed file system (DFS) in cloud computing manages data across multiple servers for scalability, fault tolerance, and efficient access. It replicates data for high availability, balances loads, ensures data consistency, and can be cost-effective.

Examples include Hadoop Distributed File System (HDFS), Google File System (GFS), Amazon Elastic File System (EFS), and Azure Blob Storage. DFS is essential for handling large-scale data storage and processing in cloud environments.

HDFS Architecture

HDFS: Hadoop Distributed File System. Google published its paper GFS and on the basis of that HDFS was developed.

It states that the files will be broken into blocks and stored in nodes... Continue reading "Cloud Computing Essentials: DFS, HDFS, Security, and Virtualization" »

Thermodynamics

First Law of Thermodynamics (Law of Energy Conservation)

Energy cannot be created or destroyed; it can only change forms.

Formula: ΔU=Q−W

Where: ΔU is the change in internal energy of the system, Q is the heat added to the system, W is the work done by the system.

Explanation: The total energy in a closed system remains constant. Energy can be transformed from one form to another (e.g., heat energy to mechanical energy).

Second Law of Thermodynamics

Key Concept: The total entropy (disorder) of an isolated system always increases or remains constant.

Formulas:

Entropy Change for Reversible Process: ΔS=Qrev /T

Where: ΔS is the change in entropy. Qrev is the heat added in a reversible process. T is the absolute temperature. Qirr is... Continue reading "Thermodynamics and Simple Harmonic Motion" »

... Continue reading "Network Security & Configuration: Routing, VLANs, DHCP, and Attack Mitigation" »

Binary Parallel Adder

A binary parallel adder is a digital circuit that adds two binary numbers in parallel, meaning all bits are added simultaneously. It typically consists of full adders arranged in parallel, with each full adder adding corresponding bits from the two input numbers.

BCD Adder

A BCD (Binary Coded Decimal) adder is a specific type of binary parallel adder designed to add two BCD numbers. BCD numbers are decimal digits encoded in binary, where each decimal digit is represented by its 4-bit binary equivalent.

Truth Table for a 4-bit BCD Adder

Here's the truth table for a 4-bit BCD adder:

Diagram

In the truth table:

• A3 A2 A1 A0 represents the first BCD number (A).
• B3 B2 B1 B0 represents the second BCD number (B).
• Cin represents the carry-

... Continue reading "Understanding Binary Adders and Race Conditions in Flip-Flops" »

Statistical Goals

• Describe: Explain what's happening in the data (e.g., mean, mode, average, minimum, variation).
• Explore: Understand how different variables relate to each other.
• Draw Inference: Test hypotheses or theories to make generalizations. Important: Correlation doesn't equal causation.
• Predict: Forecast future outcomes (e.g., weather networks).
• Draw Causal Inference: Determine cause-and-effect relationships, which requires experiments.

Variables in Statistics

Variable Types

1. Categorical (e.g., color, name, religion) vs. Numerical (Discrete: whole numbers OR Continuous: decimals, e.g., movie ranking).
2. • Nominal: Categories with no inherent order.
   • Ordinal: Categories with a meaningful order.
   • Interval: Ordered, equal intervals, but zero is arbitrary

... Continue reading "Core Statistical Concepts and Methods" »

... Continue reading "18th & 19th Century Spanish Literature: Styles & Trends" »

The Reign of Isabel II (1833-1868)

The reign of Isabel II can be divided into two main phases: her minority, with two regencies (her mother, Maria Cristina of Naples, who was soon confronted by the Carlist Wars, and General Espartero), and her majority, which went through three stages: the Moderate Decade, the Progressive Biennium, and the Liberal Union.

Regency of Maria Cristina (1833-1840)

Maria Cristina faced two major problems: war and the institutional organization of the liberal regime.

a) The Carlist Wars

The country was divided between Carlists and Isabellinos (Elizabethans). Traditionalists were loyal to Don Carlos, while those who supported Isabel had to align themselves with the liberals. The Carlist monarchists were traditionalists,... Continue reading "Isabel II's Reign in Spain: A Historical Analysis" »

Active Passive Tense
Present simple Writes / write is / are written
P. Continuous is / are writing is / are being written
Past simple wrote was / were written
Continuous Ps was / were writting was / were being -
Present Perfect has / have written has / have been --
Past perfect Had written had been written
Simple Future will write will been written
Future perfect will have will have been written -
conditional would write would be written
would have written would have been written
Infinitive to write to be written
to have written to have benn written
-ing form writing being written
written having been written havin


Impersonal
It + passive + to + v1 equal
staff
S2 + v1 + v2 passive + to infinitive


REPORTED SPEECH
Work -------... Continue reading "Passive / REproted" »