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

It is claimed that money is the only thing that motivates entrepreneurs

I can clearly say that entrepreneurs have different types of motivations. Some of them are related to the desire to earn money and others with the illusion of turning your dream into reality.

At present, the development of new companies has become very fashionable. With this, many entrepreneurs dream of becoming the next millionaire genius like Mark Zuckerberg. They also dream of traveling by private jet, partying in Las Vegas and having a Ferrari.

Although money is a great motivator and is very necessary to boost entrepreneurs, recent research concludes that people who only seek to earn money have a personality more prone to individualism, lack of willingness to work in teams... Continue reading "Motivations of Entrepreneurs: Beyond Money" »

The Rapid Pace of Technological Change

In recent years, technological breakthroughs have occurred so quickly that many adults have struggled to adapt. However, young people, especially the youngest ones, have rapidly grasped these new forms of communication.

Digital natives can spend hours on their computers, and even when away from home, they often walk down the street while typing on their phones. This rapid integration of technology can be seen as either amazing or concerning, depending on the beholder.

For them, it is fantastic how quickly they can connect with friends, stay constantly in touch, and receive the latest news instantaneously.

Communication Challenges for the Digital Generation

In my opinion, this generation seems to have lost the... Continue reading "Technology's Impact on Youth: Communication & Fitness" »

Challenges of International Matrimony

Durkheim's Theory of Social Facts and Religious Foundations

Firstly, Durkheim established that sociology is the science of social facts. These social facts have the following characteristics:

Characteristics of Social Facts

• Social facts are ways of thinking and acting.
• Social facts are normative: they rule and they are coercive.
• Social facts are external to the individual; they have an independent existence.
• Social facts are general because they encompass the whole society.

Religion as the Fundamental Social Fact

Durkheim also stated that religion is the social fact that makes society exist. To understand what religion is, his starting points for his investigation were:

• There are no true or false religions; they are all true in their own way.
• All religions

Master key terms and phrases for your next trip or career in the tourism industry. This comprehensive resource covers everything from basic travel logistics to advanced business concepts and cultural nuances.

Tourism & Travel Core Concepts

• Boom: A period of rapid economic growth.
• Demand: The desire of consumers for a good or service.
• Launch: To start or introduce something new.
• Market: The area of commercial dealing or a group of potential customers.
• Package: A set of related items or services sold together.
• Tour: A journey for pleasure in which several different places are visited.
• Supply: The amount of a good or service available (oferta).
• Supplier: A person or entity that provides goods or services (proveedor).
• Resort: A place where people go

Due to technological evolution, improved infrastructure, and decreasing prices, people are traveling more frequently and to more distant destinations. Travelers seek new places with diverse cultures, often preferring those vastly different from their own. They crave novel experiences and emotions, from exploring unique monuments unlike those in their home country to savoring unimaginable new flavors.

This trend of visiting new countries has evolved into a pursuit of exotic activities, moving beyond conventional tourism.

The Rise of Unconventional Travel Experiences

Today, the tourism industry offers a diverse array of options beyond the ordinary. Let's explore five distinct types of unconventional tourism.

Five Types of Niche Tourism

War Tourism:

SkinnerDB: Regret-Bounded Query Evaluation via Reinforcement Learning

INTRODUCTION AND PROBLEM DEFINITION:

The work is on query optimization, more specifically: SkinnerDB focuses on finding the optimal Join Order. Because it has the most impact in practice.

SkinnerDB aims to get expected near optimal results without needing any a-priori information. It does not make strong assumptions either.

CONTRIBUTIONS:

• Introduced a new quality criterion for query evaluation strategies that compares expected and optimal execution cost.
• Proposed several adaptive execution strategies based on reinforcement learning.
• Formally proved correctness and regret bounds for those execution strategies.
• Experimental comparisations of those strategies, implemented in SkinnerDB,

Acid Rain: Concurrency-Related Attacks in Database-Backed Web Applications

Motivation:

• 12 popular self-hosted e-commerce applications (deployed over 2M websites, representing over 50% of all e-commerce websites)
• 22 critical ACIDRain attacks identified and verified
• Flexcoin -> Bankrupted

Problem Definition:

An application is vulnerable if:

• Anomalies Possible: Under concurrent API access, the application may exhibit behaviors (i.e., anomalies) that could not have arisen under serial execution.
• Sensitive Invariants: The anomalies arising from concurrent access lead to violations of application invariants.

Solution:

• Execute API calls against a live application and database to generate a (possibly sequential) trace of database activity.
• Analyze the trace