Notes, summaries, assignments, exams, and problems

Pricing Strategies and Techniques

Cost-Based Pricing Techniques

• Cost Plus Pricing: Price = Total Cost + Markup.
• Marginal Cost Pricing: Ignores fixed costs; based on marginal cost and contribution.
  • Merits: Efficient pricing guidance, useful across product life cycles.
  • Demerits: Complex for accountants; not useful with fluctuating costs.

Objective-Based Pricing

• Target Return Pricing: Price set to achieve a desired Return on Investment (ROI).
• Profit Maximization: Price = Cost + Profit margin.
• Sales Maximization: Focus on maximizing sales volume.

Competition-Based Pricing

• Penetration Pricing: Low initial price to capture market share.
• Going Rate Pricing: Price set based on industry levels.
• Limit Pricing: Low price to discourage new competitors.

Accounting Concepts

Principles of Art

The principles of art are the means an artist uses to organize elements within a work. These include: balance, emphasis, movement, proportion, rhythm, unity, and variety.

Rhythm

A principle of design that indicates movement, created by the careful placement of repeated elements in a work of art to cause a visual tempo or beat.

Balance

A way of combining elements to add a feeling of equilibrium or stability to a work of art. Major types are symmetrical and asymmetrical.

Emphasis (Contrast)

A way of combining elements to stress the differences between those elements.

Proportion

A principle of design that refers to the relationship of certain elements to the whole and to each other.

Gradation

A way of combining elements by using a series... Continue reading "Fundamental Principles and Elements of Visual Art" »

Logical Fallacies in Arguments

1. Post Hoc Ergo Propter Hoc (False Cause)

The documentary suggests that because certain events happened beforehand (for example, military exercises on the same day or NORAD failures), they caused or prove the existence of a conspiracy. 📖 The document defines this fallacy as mistaking temporal sequence for causation. Essential fallacies essentially…

• 💡 Example: “There were military drills on 9/11, therefore those drills were designed to make the attacks possible.”

2. Ad Ignorantiam (Appeal to Ignorance)

The film argues that “since it hasn’t been proven that explosives weren’t used, then they must have been.” 📖 This fallacy assumes that lack of disproof is proof. Essential fallacies essentially…

• 💡

Intellectual Imprisonment: Agnes and the Yellow Wall-Paper Narrator's Negotiation with Madness

Introduction

When we think of madness in literature, we often imagine uncontrolled emotion. Yet Charlotte Perkins Gilman's The Yellow Wall-Paper (1892) and Agnes Callard's contemporary essay The Eros Monster reveal a more unsettling truth: madness can be profoundly intellectual. Both the narrator confined to her nursery and Agnes, the philosophy professor obsessed with a married colleague, demonstrate how "negotiating with madness" is fundamentally a problem of thinking. While the Yellow Wall-Paper narrator's madness manifests as psychosis and Agnes's as "perpetual thought," both discover the same truth: you cannot think your way out of a trap made... Continue reading "Intellectual Imprisonment: Analyzing Madness in Gilman and Callard" »

The Expectation-Maximization (EM) algorithm is an iterative method used to estimate the parameters of statistical models that involve latent (unobserved) variables, such as missing data or hidden cluster assignments. It is especially useful for fitting Gaussian Mixture Models (GMMs), where the goal is to model data as a mixture of several Gaussian distributions.

How the EM Algorithm Works

The EM algorithm alternates between two steps:

• Expectation Step (E-step): Given the current parameter estimates (means, covariances, and mixing coefficients for GMMs), the algorithm computes the probability (or "responsibility") that each data point belongs to each Gaussian component. This step essentially fills in the missing information about which cluster

Taking Care of the Planet Is Taking Care of Your Future

(Opening – calm and reflective tone)
Good morning, everyone. My name is Pablo, and today I want to share a simple but important lesson: Never judge a book by its cover.

That phrase doesn’t only apply to people or books — it applies to the world around us, too. Sometimes, we look at our planet and think it will always be fine, or that nature will “fix itself.” But that’s just the cover. The truth inside is very different.

The Earth: A Home We Take for Granted

(Pause – thoughtful tone)
Have you ever stopped to think about everything Earth gives you? The air you breathe, the water you drink, and the food you eat — all of it comes from this home we often take for granted. Yet, we... Continue reading "Protecting Our Planet: Why Small Actions Shape Our Future" »

Application Letter Template

To: [[email protected]]
From: [[email protected]]
Subject: Application for [Job Title / Course Name] – [Your Full Name]

Dear [Mr/Ms + Surname / Sir or Madam],

I am writing to express my interest in the [job title / course name] recently advertised on [source].
I am particularly drawn to this opportunity because [reason: it aligns with my academic background / professional aspirations / personal interests], and I am eager to contribute my skills and enthusiasm to [the company / institution].

My Qualifications and Experience

I am currently [your situation: e.g., completing my final year of secondary education / a recent graduate in … / working as …].
Throughout my [studies / previous experience], I have developed strong... Continue reading "Professional Letter Templates: Applications and Complaints" »

Key Leadership Concepts and Motivation Theories

Leadership Factors

Neutralizer (Substitute for Leadership)

A factor that makes a leader’s role unnecessary or less important. Examples include: team members are very experienced or jobs are highly structured.

Trait Leadership

Based on personal characteristics (traits) like confidence, intelligence, or honesty. This approach assumes some people are “born leaders.”

Leader–Member Exchange (LMX)

Leaders develop different quality relationships with each follower:

• High LMX: Characterized by trust, respect, loyalty, and better communication.
• Low LMX: Characterized by formal, distant relationships and limited support.

Job and Performance Enhancement

Job Enrichment

Redesigning jobs to make them more meaningful.... Continue reading "Key Leadership Theories and Motivation Concepts" »

Solar Cells

A solar cell (or photovoltaic cell) is a device that converts solar energy (sunlight) directly into electrical energy using the photovoltaic effect. It is made of semiconductors like silicon (Si), sometimes doped with phosphorus and boron to form a p–n junction. When sunlight falls on the junction, electrons move from the n-type to the p-type region, creating an electric current. Solar cells are clean, renewable, and require very little maintenance. They are widely used in:

• Solar panels
• Calculators
• Satellites
• Streetlights

Fuel Cells

A fuel cell is an electrochemical device that converts the chemical energy of a fuel (like hydrogen) and an oxidant (like oxygen) directly into electricity and water. It works as long as fuel and oxygen are... Continue reading "Solar, Fuel, and Electrolytic Cells: Energy Conversion Explained" »