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

The Waste Land by T.S. Eliot

1. Sections and Summaries

This poem comprises five sections:

• The Burial of the Dead

  Part I conveys a sense of apprehension and incomprehension among various characters in different situations. Madame Sosostris, a fortune-teller, adds to the confusion with enigmatic pronouncements that only gain clarity later in the poem. The city, particularly London, is depicted as a grim place inhabited by people unable to live fully or escape their deadness.

• A Game of Chess

  Part II presents two scenes showcasing the desolation of people's lives. The first depicts a richly decorated room where a wealthy lady's constant questions reveal her anxiety and lack of control. The second scene unfolds in a London pub, where two women discuss

... Continue reading "T.S. Eliot's The Waste Land: A Deep Dive" »

React Hooks and Essential Libraries

useState Hook

Purpose

Purpose: Adds state to functional components.

Import

import { useState } from 'react';

Syntax

const [state, setState] = useState(initialValue);

Update Methods

• setState(newValue);
• setState(prevState => ...); (for updates based on previous state)

Example

import React, { useState } from 'react';

function Counter() {
  const [count, setCount] = useState(0);

  return (
    <div>
      <p>Count: {count}</p>
      <button onClick={() => setCount(count + 1)}>Increment</button>
    </div>
  );
}

useEffect Hook

Purpose

Purpose: Performs side effects such as data fetching, subscriptions, or direct DOM manipulations.

Import

import { useEffect } from 'react';

Syntax

useEffect(

... Continue reading "React Hooks & Redux: Essential Concepts for Developers" »

Este compendio presenta una colección organizada de prefijos, palabras raíces y sufijos, tanto en español como en inglés, incluyendo ejemplos de terminología general y médica.

Componentes Morfológicos en Español

10 Ejemplos de Prefijos Comunes

• Pre-: Significa "antes". Ejemplo: prever (pre- + ver).
• In-: Significa "no" o "dentro". Ejemplo: incapaz (in- + capaz).
• Re-: Significa "repetición" o "intensificación". Ejemplo: rehacer (re- + hacer).
• Sub-: Significa "debajo" o "inferior". Ejemplo: subterráneo (sub- + terráneo).
• Extra-: Significa "fuera de" o "adicional". Ejemplo: extraordinario (extra- + ordinario).
• Des-: Significa "negación" o "separación". Ejemplo: deshacer (des- + hacer).
• Inter-: Significa "entre" o "en medio". Ejemplo: internacional

... Continue reading "Fundamentos de Morfología: Prefijos, Raíces y Sufijos" »

Preparation of Naphthalene

Naphthalene is a fused-ring aromatic hydrocarbon with two benzene rings. It can be prepared via the following methods:

• From Coal Tar: Coal tar, a by-product of coal processing, is a major source of naphthalene. It is extracted and purified using distillation followed by crystallization.
• Synthesis from Benzene: Benzene undergoes a series of reactions to form naphthalene:
  • Alkylation: Benzene reacts with alkyl halides (like methyl chloride) to form methylbenzene (toluene).
  • Cyclization: Toluene undergoes further reaction with chlorine and heat to form naphthalene.

Preparation of Anthracene

Anthracene is a tricyclic aromatic hydrocarbon consisting of three fused benzene rings. It is mainly obtained from coal tar but can also... Continue reading "Synthesis and Sources of Aromatic Hydrocarbons" »

Insect Defenses Against Predators

Three Plant Mechanisms to Defend Against Insects

• Physical: Thick walls
• Chemical: Phytochemicals that kill insects
• Entrapment: Pitcher plants

How Insects Overcome Physical Defenses

• Specialized mandibles
• Evolution
• Immunity to phytochemicals
• Specialization to survive the digestive liquid of pitcher plants

Insect Parasitism

Endoparasites

Approximately 20% of insect orders include endoparasites. Some orders that include endoparasites are:

• Hymenoptera
• Diptera
• Strepsiptera

Ectoparasites

Some orders that include ectoparasites are:

• Anoplura
• Mallophaga
• Siphonaptera

Three Challenges Faced by Endoparasites

• Respiration
• Excretion/getting rid of toxic nitrogenous waste without killing the host
• Avoiding the host's endocrine system

Insect Social Behavior

Subsocial

... Continue reading "Insect Biology: Adaptations, Behaviors, and Ecology" »

Essential Japanese Language Basics

This section provides fundamental Japanese phrases and essential cultural insights to help you navigate daily interactions and understand Japanese society better.

Hiragana and Katakana Fundamentals

Key Japanese Phrases for Communication

Essential Japanese Greetings

Good morning.
おはようございます。
Ohayou gozaimasu.

Hello / Good afternoon.
こんにちは。
Konnichiwa.

Good evening.
こんばんは。
Konbanwa.

Goodbye.
さようなら。
Sayounara.

Good night.
おやすみなさい。
Oyasuminasai.

Polite Japanese Expressions

Please.
お願いします。
Onegaishimasu.

Thank you.
ありがとうございます。
Arigatou gozaimasu.

I am sorry.
ごめんなさい。
Gomen nasai.

No, don't worry about it / You're welcome.
いいえ、気にしないで。
Iie,

... Continue reading "Essential Japanese Phrases & Cultural Insights" »

diga la naturalez ade lps medios alternativos de solucion de conflictos
son contrahegemonicos porque nacieron , en lo moderno en rusia para oponerse al poder opresor del estado
carasteristicas de los medios alternativos de solucion de conflictos
si son voluntarios , si son formales ,
la mediacion y la negociacion son informales
el arbitraje y la mediacion son formales
que limita al poder hegemonico de los gobiernos
lo alternativo o segunda opcion y posibilidad de resolver los problemas , sin la intervencion del poder opresor y hegemonico del estado
A YEGAR A UN ACUERDO


explique los principales procesos alternativos
transaccion o negociacion , mediacion, arbitraje y conciliacion
cricis que atraviesa ell poder judicial
el congestionamiento... Continue reading "Medios alternativos en la solucion de conficto" »

#useradd nombredeusuario :: para crear usuarios

#passwd :: nombredelusuario

#groupadd :: nombredelgrupo :: (forma normal)

#groupadd -g 600 nombredelgrupo :: (guid sobre 650)

#userdel nombredelusuario :: para deletear usuarios

#groupdelnombredelgrupo :: borrar el grupo

#usermod -G nombredelgrupo nombredeusuario :: para asignar usuario a grupo.

opcion 2: editar archivo /etc/group -> grupo:x:600:usuarioqueseagregara

#nano /etc/shadow :: para poder ver los usuarios y poder bloquearlos

#passwd -l nombredeusuario :: para bloquear usuario

#passwd -u nombredeusuario :: para desbloquear usuario

#sudo passwd :: para cambiar la contraseña de root

# tail /etc/passwd :: paraver informacion de usuarios

#su nombredelotrousuario :: para iniciar sesion como el usuario... Continue reading "Centos 5.5" »

1. Classifique as variáveis em qualitativa e quantitativa. () Cor preferida. () Índice de liquidez. () Sexo. e) qualitativa, quantitativa, qualitativa .
2. Classifique as variáveis quantitativas em contínuas (c) ou discretas (d).
( ) População: atletas Variável: altura ( ) P.: pacientes de um hospital Variável: pacientes com insuficiência cardíaca. ( ) P.: bebês monitorados em uma UTI neonatal Variável: peso b) contínua, discreta, contínua.
3. Em uma escola de ensino médio, há 300 alunos divididos em 6…..b)36
4. São fases do método estatístico:
1. A apuração. 2. A coleta. 3. A crítica. 4. A definição do problema. 5. O planejamento.
Qual a ordem correta dessas fases? b. 4, 5, 2, 3, 1
5. Considere a série abaixo. Podemos

... Continue reading "Case" »

Opportunity Cost of Capital: Expected rate of return given up by investing in a project.
NPV: Present value of cash flows minus investments
Payback period: Time until cash flows recover the initial investment in the project.
IRR: Discount rate at which project NPV = 0
Profitability Index: Ratio of net present value to initial investment
Opportunity Cost: Benefit or cash flow as a result of an action
Net Working Capital: Current assets minus liabilities
Depreciation Tax Shield: Reduction in taxes attributable to depreciation
Operating Leverage: Degree to which costs are fixed
Market Index: Measure of the investment performance of the overall market
Maturity Premium: Extra avg. return from investing long vs. short- term treasury securities
Risk Premium:... Continue reading "Finan midterm" »