Notes, summaries, assignments, exams, and problems

Teleworking, also known as remote work, has become more relevant in recent years due to the accelerated digital transformation that the world of work has experienced. This modality of work refers to the possibility of carrying out tasks from any place that has Internet access, allowing employees to have more flexibility in terms of hours and geographic location.

Among the benefits of teleworking are the reduction of costs for the company in terms of infrastructure and services, the reduction of travel time for employees, the possibility of working with professionals from anywhere in the world and the improvement of the reconciliation between work and personal life. Additionally, it can be a viable option for people with disabilities or travel... Continue reading "How do computers affect the way people work spend free time?" »

What is Standard of Living?

A person's standard of living is the level of material comfort that they are able to enjoy in terms of the goods and services which they can buy or use.

Understanding Gross Domestic Product (GDP)

The GDP measures the growth of economies over time.

• It can be used to make comparisons between levels of production, income, and spending between countries.

Limitations of GDP as a Measure

GDP is NOT a good measure for several reasons:

• It doesn't take into account the degree of inequality in a society. Although GDP per head in a country might rise over time, prosperity does not necessarily make much difference to the living standards of poorer people.
• GDP simply measures the value of goods produced; it doesn't take into account

Know what the relationship is between density and temperature

Substances have different densities depending on their temperature.  

For example, a lake on a hot summer day. The surface temperature is warmer than the water beneath. The warm water floats on the cold because it has a lower density. 

Know why your ears pop when you are landing at an airport

Your ears pop from pressure change. The change of pressure outside causes your middle ear to have to readjust, resulting in a popping sound

Know the term buoyancy and why objects sink or float in a substance

Buoyancy is the ability of an object in a fluid to rise or sink due to density differences with its surroundings.

Know the densities of some common substances

Know

Understanding Poverty

Defining Poverty

Relative poverty refers to economic inequality within a society. Individuals or groups experiencing relative poverty have less access to goods and services compared to others.

Absolute poverty signifies the lack of resources to meet basic human needs, such as water, food, sanitation, shelter, clothing, and education.

People Affected by Poverty

Individuals facing poverty often experience disadvantages, including limited access to quality education and increased health risks.

Causes of Poverty

1. Unemployment or Underemployment: Lack of sufficient work opportunities to earn a living wage.
2. Old Age: Insufficient income after retirement.
3. Ill Health: Mental and physical health issues can hinder employment and increase expenses.

Understanding Chromatography

Chromatography is used in column chromatography. The y-axis represents the intensity of the signal provided by the detector, and the x-axis represents time. Peaks can give us sample information, both qualitative and quantitative. Detectors are usually connected to computers that provide the different peak parameters (height, amplitude, etc.), relating them to the concentration. The position of the peak (time) provides qualitative information, and the areas or heights of the peak provide quantitative information.

The retention time, tR, is the time it takes for a component to come out from the injection of the sample into the column up to the middle of its peak. The areas of the peaks are proportional to the concentration... Continue reading "Understanding Chromatography: Principles, Phases, and Methodology" »

Problem Statement

Explore the usage of basic Linux system calls.

Process Management System Calls

The system calls to manage processes are:

• fork(): Used to create a new process.
• exec(): Executes a new program.
• wait(): Waits until the process finishes execution.
• exit(): Exits from the process.

System calls used to get process IDs are:

• getpid(): Gets the unique process ID of the process.
• getppid(): Gets the parent process's unique ID.

Stat System Call

The stat system call retrieves information about files, specifically from their inodes. For instance, to get a file's size and name, you would typically use stat. Let's illustrate with a C code snippet (src/ls1.c):

#include<stdio.h>
#include<dirent.h>
#include<cstdlib>

struct dirent *dptr;

Intelligent Technology: ChatGPT and Communication

Intelligent technology like ChatGPT is a valuable tool for improving human communication. Intelligent chatbots can provide precise and efficient responses to questions and requests, improving the user experience and operational efficiency in various sectors, such as customer service, education, and healthcare.

Risks and Challenges of Intelligent Technology

Although intelligent technology presents certain risks and challenges, such as privacy and security of user data and perpetuating data biases, it is important to address these challenges to ensure ethical and responsible use of this technology.

Benefits of Intelligent Technology

Overall, intelligent technology like ChatGPT offers significant potential... Continue reading "ChatGPT: Enhancing Human Communication" »

1- The lottery is conducted on June 27th around ten o’clock. The titular lottery chooses one person from the town to be stoned to death every year for no other reason than tradition.

All the people of the town gather together and the heads of the extended families each draw one slip from the black box, but they do not unfold them until all the slips have been drawn. The one with the black dot on it goes to a second round of drawing to choose one household within the family. For the final drawing, one slip is placed in the box for each member of the household and the person with the black dot is stoned to death. In the story, this person is Tessie Hutchinson.

2- Old Man Warner responds to Mr. Adams who tells him that another village had given... Continue reading "Purpose and content of" »

ECONOMY europe--> 1st half crisis bc destruction & debt 2nd half distention bc of better international relationshipsh+prosperity- germany = worst state PRIMER CÍRCULO way out = Dawes plan (ends ruhr occupation, lowers war reparations, gives money for economic recovery)/ USA--> industrial growt, increase in exports, europe pays dawes plan + mass consumer society "american livestyle" (car + house appliances) / 1929 crisis growth based on consmption development by credits, increase in speculation=increase in stock market value, SEGUNDO CÍRCULO , globalisation of crisis=great depression (that ends w/WWII) / way out great depr economic nationalism & state intervention - USA elections 32' hoover (economic liberalism) vs roosevelt