Notes, abstracts, papers, exams and problems

Operations research (OR) is an analytical method of problem-solving and decision-making that is useful in the management of organizations. In operations research, problems are broken down into basic components and then solved in defined steps by mathematical analysis.

The process of operations research can be broadly broken down into the following steps:

1. Identifying a problem that needs to be solved.
2. Constructing a model around the problem that resembles the real world and variables.
3. Using the model to derive solutions to the problem.
4. Testing each solution on the model and analyzing its success.
5. Implementing the solution to the actual problem.

Disciplines that are similar to, or overlap with, operations research include statistical analysis, management... Continue reading "Operations Research: Definition, Characteristics, and Uses" »

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Sex and Gender in the Ancient World - Final Exam

Homer— patriarchal society: men hold positions of power and influence, the Iliad focuses on the actions of male warriors, leaders, gods, highlighting the dominance of men in both the mortal and divine realms. Glorifies the virtues associated with masculinity (bravery, physical strength, bravery in battle). The heroism of characters like Achilles and Hector is deeply tied to their adherence to a warrior code that values martial prowess and honor. Women were portrayed in domestic roles. Responsible for activities like weaving and managing the household. The women: Helen and Andromache, have limited agency in the public sphere and are largely defined by their relationships with men. Despite not... Continue reading "Ancient Gender Roles and Society: A Comprehensive Overview" »

French-English Job Vocabulary

A

• Agent de voyage: Travel Agent
• Agent immobilier: Estate Agent
• Apprendre vite: Be a Fast Learner
• Arriver: Turn Up
• Assistant social: Social Worker
• A tout moment: At Any Time
• Avoir besoin de: Require
• Avoir de l'exp. en: Have Experience Of
• Avoir honte: Feel Ashamed
• Avoir l'idée de: Come Up With
• Avoir les compétences: Possess Skills
• Avoir une vue excellente: Have Excellent Eyesight

C

• Candidat approprié: Suitable Candidate
• Charpentier: Carpenter
• Chercher du travail: Look for a Job
• Commerce de détail: Retail
• Compétences personnelles: Personal Skills
• Comptable: Accountant
• Compter sur: Rely On
• Confus: Confused
• Courageux: Brave

D

• Dégoutant: Disgusting
• Dégouté: Disgusted
• Dég qqun de qqch: Put Somebody Off Something
• Démissionner: Resign From

Fear

A natural emotional response to a perceived threat or danger. It's a basic survival mechanism.

Phobia

An extreme and irrational fear of a specific object, situation, or activity. Phobias can cause significant distress and impact daily life.

Pathos

An appeal to emotions to persuade or convince an audience.

Logos

An appeal to logic or reason, using facts, evidence, and reasoning to support an argument.

Ethos

An appeal based on the credibility or character of the speaker, emphasizing trustworthiness and expertise.

Interpersonal

Relating to interactions and relationships between people.

Intrapersonal

Relating to introspection, self-awareness, and understanding oneself.

Confidence

Confidence is a belief in one's abilities, skills, and judgments. Difficulties... Continue reading "Understanding Fear, Phobias, and Communication Barriers" »

Module 9: Firebase Application

Realtime Database

A cloud-hosted database. Data is stored as JSON and synchronized in real-time to every connected client. Provides easy-to-use services for authentication (email/password, 3rd-party providers like Google/Facebook).

Cloud Firestore

A flexible and scalable database for mobile, web, and development. It offers synchronization, offline support, and ACID transactions.

Cloud Functions

...

Hosting

CSS/JavaScript

Cloud Storage

Provides robust, secure file uploads and downloads for Firebase apps.

Module 10: UML Diagrams

Structural Diagrams

• Class Diagram: Shows class hierarchy, fields/attributes, and relevant methods.

How to Read

• Visibility:
  • +: Public
  • -: Private
  • #: Protected (accessed only by child classes)
• Relationships:

College vs. University

College: Usually offers more narrow programs and may not have graduate studies at all. Some universities use the term "college" to highlight a specific school of study encompassed within its institution.

University: Denotes a school that offers full undergraduate and graduate programs. Universities often devote themselves to research and are more focused on a specific subject.

Key Differences Summarized

• College:
  • Size: Smaller campuses and fewer students.
  • Program Types: 2-year and 4-year degrees.
  • Degrees Awarded: Certificates, Associate, and Bachelor's.
  • Enrollment: Open to all students.
  • Cost: Usually less expensive.
• University:
  • Size: Larger campuses and more students.
  • Program Types: 4-year and usually graduate programs.
  • Degrees Awarded:

Regulation of Enzyme Activity

Enzymes are the workhorses of cells, catalyzing the thousands of biochemical reactions that keep cells alive and functioning. The activity of enzymes is carefully controlled to ensure that the proper amount of product is produced at the right time.

Why Regulate Enzyme Activity?

There are several reasons why cells need to regulate enzyme activity. First, the concentration of substrates and products can vary widely within the cell. If enzyme activity were constant, the rate of the reaction would also vary wildly, depending on the availability of substrates. Regulation allows the cell to adjust the rate of the reaction to match the needs of the cell.

Second, the cell needs to coordinate the activities of different enzymes... Continue reading "Enzyme Regulation: Mechanisms and Examples" »

Inheritance in Java

Inheritance in Java is a mechanism where one object acquires all the properties and behaviors of another object. Inheritance represents the IS-A relationship, also known as a parent-child relationship.

Using inheritance, you can create a general class that defines common traits for a set of related items. This class can then be inherited by other classes, each adding its unique elements.

The keyword extends defines a new class from an existing class. The existing class is called the parent/base/superclass, and the new class is called the child/derived/subclass.

Here's a breakdown:

• Child classes inherit all members of their parent class.
• Child classes cannot access the private members of the parent class directly.
• To access private

1. Structure of an atom -  An atom is composed of protons, electrons, and neutrons. The entire mass of an atom is concentrated in the nucleus which is at the centre.

   1. Protons - Protons are the positively charged particles which are present in the nucleus of an atom.

   2. Neutrons - Neutrons are the particles in an atom that have a neutral charge. 

   3. Electrons - An electron is a negatively charged subatomic particle that can be either bound to an atom or free

   4. Atomic Mass (what it represents) - The atomic number refers to the number of protons in the atom's nucleus, 

   5. Atomic Number (what it represents) - The atomic mass of an element represent the average total mass of its neutrons, protons, and electrons

2. Standard Atomic Notation

   1. How to determine how many neutrons,