Commercial Premises and Retail Trade: Types and Evolution
Commercial Premises: A Classification
New commercial large premises owe their prosperity to increased living standards and purchasing power.
- Self-service stores: less than 100m2 showroom.
- Supermarkets: between 100-2500 m2 room.
- Hypermarkets: more than 2500 m2.
- Discount chains (wholesale): adopt self-service, shifting the merchant’s role to the buyer. Removing personnel and selling large quantities improves prices on food and household items. They are located in city centers or neighborhoods, except for
Database Concepts: Questions and Answers
Database Fundamentals: Q&A
Questionnaire 1
- What method is needed for flexible storage and retrieval of large amounts of data?
Management System Database (DBMS) - What is a set of data elements that describes itself with relations between these elements?
Database - What is a relationship?
It’s a sense of unity that exists between certain data elements. - Mention the 5 models of database:
- Relational
- Object Oriented
- Deductive
- Network
- Hierarchical
- What is the most popular database model?
Relational model. - What
Global Trade: Energy, Agriculture, Manufacturing, and Labor
**The Flows of Global Trade**
**4.1 Energy Products**
The energy market is currently dominated by hydrocarbons (natural gas, petroleum, and its derivatives). The USA has to import oil because of its consumption, which puts it in competition with China in the oil market. They dominate the market. The trade of energy is equivalent to 10% of the world trade, and its strategic importance is such that states consider it a priority, both from an economic point of view and for security. Oil-importing countries,
Read MoreMechanical Auxiliaries: Energy Storage, Brakes, Clutches & More
Mechanical Auxiliaries for Optimal Operation
14 auxiliaries provide optimal operation of energy storage elements. These elements store energy and subsequently provide mechanical energy. Accumulators like the flywheel, typically a solid disk mounted on a shaft, ensure regular rotation, preventing irregular motion when the driving force is not constant. It also slows shaft rotation when it tends to accelerate and resists stopping.
Elastic Elements
Elastic elements deform under force and return to their
Read MoreSt. Thomas Aquinas: Proofs of God’s Existence & Moral Philosophy
St. Thomas Aquinas on God and Morality
According to St. Thomas Aquinas, the existence of God is a natural knowledge in humans, which can be reached through the proper use of reason and logic, even without Christian Revelation or an act of faith. Reason, when addressed logically and scientifically, can attain certainty of God’s existence, as well as the immortality and spirituality of the soul. These two statements are called, the preambles of faith.
Reason precedes faith and philosophy precedes theology,
Read MoreThe Great War: Origins, Conflict, and Impact
Causes of World War I
The causes that led to World War I include:
- Political Alliances: Led by Germany, the creation of two opposing blocs (Triple Alliance and Triple Entente) led to a period known as the ‘Armed Peace,’ where powers rearmed for a war that seemed inevitable.
- Competition for Markets: The search for markets for industrial products led to frequent conflicts over colonies, with the Moroccan crisis being a significant flashpoint.
- Rivalry for Influence: Competition for zones of influence among
Ethical Thinking, AI, and the Digital Age: Key Concepts
Avoiding Ethical Thinking
Here are three ways people often avoid ethical thinking:
- Flying by instinct: Acting on gut feelings without considering the ethical implications, which can lead to poor decisions. For example, not helping a friend because you feel too busy, without considering the importance of support.
- Off-hand self-justification: Quickly making excuses for actions without thinking about whether they are right or wrong. For instance, taking office supplies home, thinking, “The company has
Vitamins: Functions, Sources, Deficiencies, and Toxicity
Vitamin A
Vitamin A is a group of compounds organized into two classes:
- Retinoids: Preformed vitamin A found in food of animal origin, such as meat, eggs, and dairy products.
- Carotenoids: Precursors of vitamin A present in plant foods (fruits and vegetables), like beta-carotene from green leaves.
Features
- Cell differentiation
- Reproduction
- Growth
- Development of bones and teeth
- Synthesis and maintenance of a healthy epithelium (like the retina)
- Immune system integrity
- Prevention of night blindness (an essential
Cartesian Mechanisms, Ideas, and Method
Cartesian Mechanisms
The Cartesian mechanistic states that the body is a machine and that all dealings must be explained by the same principles and physical laws that apply to the inanimate world. Indeed, the use of animal spirits does not serve to solve the problem of substance interaction. The mind-body problem is one of the most interesting issues in contemporary philosophy. Hard to find now a defender of classic dualism or dualism of substances. If there are, however, other forms of dualism that
Read MoreRussian Empire: Tsars, Revolution, and Soviet Five-Year Plans
The Russian Empire Under the Tsars
The Russian Empire was ruled by autocratic tsars, and during the first half of the 19th century, it remained largely untouched by the economic and social changes of the industrial revolution. It was a rural-based country, with a large population of serfs. The tsars held all powers, enacting laws, appointing ministers, and controlling religious matters. Unlike Western monarchs, the tsar had no parliamentary or constitutional restrictions, ruling with the help of
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