Notes, summaries, assignments, exams, and problems for Primary education

TERZA PARTE

1. Fed-batch biological reactor: material balances with Monod kinetics and operating methods:

• it maintains some operational characteristics of the batch, while ensuring constant biomass production such as a CSTR
• Therefore, there is an inlet supply with V˙e and [substrate] Cse and negligible Cxe
• since it is not a continuous reactor, it will never reach the steady state condition, there will always be an accumulation
• at zero time there will be: a certain initial V_R with an initial [substrate], initial [biomass] and subsequently the volume will increase over time.
• Total biomass balance:
• dmtot / dt = me, with me = ρe V ,e,
• from this relationship we obtain that
  1. dVr / dt = V˙e.
• At this point two feeding strategies can be considered,
  1. 1. one with

Southern Europe

Geographic Features

Mountains and Peninsulas

• Pyrenees Mountains: Form a natural border between Spain and France.
• Undersea Mountains: Contribute to the formation of many islands in Southern Europe.
• Alps: Europe's highest mountain range.
• Apennines: Run along the Italian Peninsula.
• Balkan Peninsula: Home to Greece.
• Iberian Peninsula: Location of Spain and Portugal.

Water Bodies and Climate

• Mediterranean Sea: Influences the climate and culture of Southern European countries.
• Mediterranean Climate: Characterized by warm, dry summers and mild, wet winters, ideal for growing crops.
• Tagus River: The longest river in Southern Europe.
• Po River: Flows through a fertile and densely populated area in Italy.

Culture and History

Ancient Greece

• Democracy:

What landforms stretches from the Atlantic coast and Eastern Europe?

Northern European plain

The leading agricultural producer in the European Union is

France

Germany's economy is based on

Industry

What landform covers much of Switzerland and Austria

Mountains

West Central Europe's Marine West Coast climate is a key natural resource for

Farming

During World War II France and the Benelux countries were invaded by

Germany

The Benelux countries are all

densely populated

The Dutch have used dikes and other technology to

Create polders

A highly urbanized and industrialized area of the Netherlands is called

Rotterdam

What industry employs more than half of Austria's workforce?

Service

Belgium has been troubled by regional conflicts over

Language and other cultural issues

Switzerland

Does... Continue reading "Key Features of European Geography and History" »

In the periodic table, elements are classified into metals, nonmetals, and metalloids. Metals are ductile, malleable, shiny, are good conductors for heat and electricity. All metals are solids at room temperature and pressure except, Mercury. Nonmetals exist as solids, liquids, or gases. A liquid non-metal at room temperature and pressure is Bromine.

2. The elements in the d-block in the periodic table have several characteristics in common.

(i) Give the electron configuration of N²⁺

1S2 2S2 2P3- 2= 1S2 2S2 2P1

(ii) Explain what is meant by a ligand and describe the type of bond formed between a ligand and a d-block element.

It is an atom or molecule with a lone pair of electrons that combine with a metal through coordinate covalent bonding. In transition... Continue reading "Chemistry Basics: Metals, Nonmetals, and Transition Elements" »

The Model of Valuation of Financial Assets by the Arbitrage Pricing Theory

Stephen Ross developed this theory in 1976. It is an equilibrium model for asset valuation. Its central idea is the expected return on an asset must be a linear function of its systematic risk. The APT considers that the only risk that the market is willing to remunerate is the systematic one, since the rest of the risk can be eliminated via diversification. According to this model, the systematic risk is the fundamental explanatory factor of the performance of the profitability of financial assets, although that is not measured only by the beta coefficient of the profitability of an individual asset with respect to the profitability of the market portfolio, but by a... Continue reading "Understanding the Arbitrage Pricing Theory for Financial Asset Valuation" »

Markowitz Model Assumptions

Harry Markowitz was the first to investigate financial markets in this way. He developed the theory of portfolio selection based on the best conditions for the placement of capital in a situation of uncertainty.

Investor Motivation & Portfolio Goals

Markowitz focuses his work on defining the factors that motivate the investor when investing. It is based on the utility function of the investor that depends on the profitability he wants to obtain and the risk he can assume. What it intends is to compose an optimal portfolio of securities for an investor, this being the best possible among all those that can be formed. It will be a search for a portfolio where performance is maximized for a given risk or vice versa.... Continue reading "Markowitz Portfolio Theory Explained" »

Linguistic Concepts

2. (1.5p) Define the following concepts as they have been used in this course, giving an example of each:

Meronymy

Meronymy is the semantic relation between a lexical item denoting a part and that denoting the corresponding whole. Meronyms are mentally triggered, since our minds have scripts, e.g., knowledge about event sequences due to knowledge of the world. We have scripts for events that commonly occur in our lives, such as going to a doctor's office, a restaurant, a library, or the supermarket.

Converses

Converses are pairs of opposite terms characterized by the following feature: when one member of the pair is substituted for the other, the new sentence can be made logically equivalent to the original one by interchanging... Continue reading "Linguistic Concepts: Definitions and Examples" »

Understanding the Fan: From Stereotype to Participatory Media Culture

Defining the Fan: Beyond Negative Connotations

To appropriately answer this question, one must first address the definition of ‘fan’. The term is an abbreviation of ‘fanatic’, which carries religious connotations, referring to devotees or those with secular faith. Historically, it has often been associated with negative societal perceptions.

Henry Jenkins and the Rejection of Fan Stereotypes

Henry Jenkins, an American media scholar and lecturer from the second half of the 20th century, extensively discusses various phenomena related to fans in his seminal book, Textual Poachers: Television Fans and Participatory Culture. Jenkins actively rejects common fan stereotypes,... Continue reading "Fandom Dynamics: From Consumption to Participatory Media Culture" »

My Future Starts Now

What do you think your future self will thank you for?

Good morning, I’m here today to tell you about how your choices affect your future and have a big impact on the rest of your life.

Our future is decided by the everyday choices we make or choose not to make. If you don’t want to decide yourself, you let someone else decide for you or you just don’t make the decision, [ZW3] but you don’t know what would have happened if you had made the decision yourself or if you had made a different decision. In books, movies, and TV shows, people say that you can’t change the future, but just by making different choices, your future might look way different.

The Importance of Choices

are very important, we all make at least... Continue reading "The Impact of Choices on Your Future" »

Minimum Level or Safety Stock

The minimum level is the minimum quantity of the material which must be maintained in hand at all times. The quantity is fixed so that the production is not held up due to shortage of the materials. In fixing this level, the following factors should be considered:

• Lead time i.e. time lag between indenting and receiving of the material. It is the time required to replenish the supply.
• Rate of consumption of the material during the lead time.
• Nature of the material. Minimum level is not required in case of a special material which is required against customer’s specific order.

Maximum Stock Level

It is the maximum of stock which should be held in stock at any time during the year. The quantity is fixed so as to avoid... Continue reading "Inventory Management Techniques and Time-Keeping Methods" »