Notes, summaries, assignments, exams, and problems

Popular Piano Songs: Easy Sheet Music

Rice Pudding

Fa Fa Fa Do
Do Fa Fa La Sol
The Sib The Sol Fa Do Re Do Mi Mi Mi Mi Fa

Do Fa La La Fa
Do Fa La La Sol
The Sib The Sol Fa Do Re Do Mi Mi Mi Mi Fa

Silent Night

Sol La Sol Mi
Sol La Sol Mi
If you do re re do Sol

La La La Sol's do If Sol Mi
La La La Sol's do If Sol Mi

re re re fa mi re do if
Sol Mi Fa Do Sol Re Do

re re re fa mi re do if
Sol Mi Fa Do Sol Re Do

Ode to Joy

If you do re re do If If The Sun Sol La Si Si La La
If you do re re do If If The Sun Sun Sun Sun The If's

The sun If the sun If you do If
If you do If the sun's La Re

If you do re re do If If The Sun Sun Sun Sun The If's

La Cucaracha

Fa La Do Do Do
Fa La Do Do Do
Fa Fa Mi Mi Re Re Do

Do Do Do Mi Sol
Do Do Do Mi Sol
do... Continue reading "Easy Piano Sheet Music: Popular Songs & Keyboard Positions" »

Network Troubleshooting Q&A

Common Issues and Resolutions

1. Q: Refer to the exhibit. Based on the output shown, which IP network should the workstations in the Support department belong?
   A: 172.16.3.0

2. Q: Refer to the exhibit. A network administrator is doing proactive network maintenance. The administrator pings 192.168.1.100 and compares the results with reference data. Based on the comparison of the two pings, what is a possibility?
   A: There are problems with network congestion.

3. Q: See exhibit. Given the output generated by the debug ppp negotiation, is the statement true?
   A: The line protocol of the local router is up.

4. Q: What is important to consider when configuring the subinterfaces of a router in implementing inter-VLAN routing?
   A: The

Linux File System Structure: An archive of Linux is associated with 3 parts: superblock, inode table, and data blocks.

Network Ports: To see the ports assigned to services.

Display Active TCP/IP Connections: netstat -a

User Management:

• Create password: passwd (user)
• Add user to group: usermod -g group_name
• Disable: 60001
• Enable: 60002

Practical Commands:

Add User: adduser

1. Change folder privileges: chmod
2. Check privileges: ls -de (see if you changed privileges)

1. Create a user: useradd newuser
passwd newuser
2. Create a directory: The command mkdir is used to create directories:
   mkdir mydirectory
3. Create a report: ps -aux >> reporte.txt
4. Directories associated with the user: -d dirname
5. Changing permission: chmod 744 file.txt /file.txt
6. Change owner: chown
   Entering

Porifera and Cnidarians: Structure

Porifera (sponges) and Cnidarians (anemones, corals, and jellyfish) are simple, aquatic invertebrates.

Porifera (Sponges)

• Mostly marine, some freshwater species
• Bag-shaped body with pores that communicate with the atrial cavity
• The atrial cavity connects with the exterior through the osculum
• High capacity for regeneration

Cnidarians

• Anemones, corals, and jellyfish (all marine), hydra (freshwater)
• Radial symmetry
• Soft body with a single opening surrounded by tentacles
• Stinging cells (cnidocytes)
• Gastrovascular cavity that functions as a stomach
• Carnivorous
• Two forms:
  • Polyps: Tubular, bag-shaped with the opening at the top
  • Medusae: Umbrella-shaped, actively swim or float in the water

Worms: Platyhelminthes, Nematodes, and Annelids

Worms... Continue reading "Invertebrate Animals: Characteristics and Classification" »

Mobile Phones

Comprehension (4 points)

1. 1) No, because dangerous effects have not been shown conclusively.
2. 2) Because they used the phone while they were driving.

1. 3) True… advanced features are packed into extremely light and tiny models (lines 5-6).
2. 4) True… mobile phones can be a serious threat to health, for children in particular (line 7).
3. 5) False… what for many people is a useful device can be a nuisance for others (line 11).
4. 6) False. Some people even claim that… (lines 12-13).

Use of English (3 points)

1. 7) Luxury (l.1)
2. 8) Light (l. 6)
3. 9) Sickness, illness, disease
4. 10) Headache, backache, stomach-ache… toothache, heartache
5. 11) She said: “We’ll go and get some food.”
   She said they/we would go and get some food.
6. 12) I asked my father to

English Vocabulary Acquisition

How Children Learn Word Meaning

Children are always acquiring and building up their L1. They must find out which things can be packaged together under a label.

Knowing a Word: Types of Knowledge

Knowing a word involves different types of knowledge. The importance is how it is pronounced.

Factors Affecting Vocabulary Learning

• Demonstrability: Can the meaning be easily shown? (e.g., car = transport)
• Similarity: Is it similar to known words? (e.g., equal)
• Brevity: Is it a short or long word?
• Regularity of Form / Learning Load: Does it follow typical patterns? (e.g., bedroom)
• Opportunism: Is the word relevant to the child's immediate situation?
• Centres of Interest: Are words likely to be of relevance to the child's interests?

Ejercicio de descuentos:

#!/bin/bash

read -p "¿Desea el billete también de vuelta? (s/n): " idavuelta

until [ $idavuelta=="s" ] || [ $idavuelta=="n" ]; do

read -p "¿Desea el billete también de vuelta? (s/n): " idavuelta

done

read -p "¿Tiene carnet joven? (s/n): " carnetjoven

until [ $carnetjoven="s" ] || [ $carnetjoven="n" ]; do

read -p "¿Tiene carnet joven? (s/n): " carnetjoven

done

descuento=0 billete=20

if [ $idavuelta="s" ]; then

descuento=20

billete=" expr $billete \* 2'

fi

if [ $carnetjoven="s" ]j then

descuento=30

fi

costefinal=`expr $billete \* \( 100 - $descuento \) / 100`

echo "El precio final del billete es $costefinal"

Ejercicio de medias:

#!/bin/bash

acu=0

cont=0

read -p "Introduce un numero: " num

while [ $num -ne 0 ]; do

acu=`expr $acu + $num`

cont=... Continue reading "Shell script" »

Foreword

In the name of God amen. Among the many strange and wonderful things that made the Lord God is one that is most striking, as is the fact that there are so many people in the world, none is identical to the traits of the face, although that all have the same elements in it. If the faces that are so small, they show such great variety, it is not surprising that there are large differences in the desires and inclinations of men. So you will see that no man is like another, nor in the will or its inclinations, and so I give some examples so that you can understand it better.

All who love and want to serve God, but want the same, each one serves a different way, as some do in one way and others another way. Likewise, all in the service... Continue reading "Count Lucanor - Full Paper" »

To control by PWM requires 2 factors:

1-crossing detection signal by 0.

2-? determine the time, every time you walk by 0.

to detect the zero crossing can be performed
through an operational amplifier connected
comparator.

TCA = 785

Pin Symbol Function

1 GND Earth

2 Q2 *Output 2 Inverted

3 Output U QU

4 Q1 * Output 1 Inverted

5 5Synchronizing voltage Vsync (to detect

zero crossing)

6 Inhibitor

7 QZ Z Output

8 8 Vref voltage stabilized (continuous signal for the

integrator)

9 9 ramp resistor R9 (for the integrator)

10 C10 ramp Capacitance (for the integrator)

11 11 V11 Control Voltage (for comparator)

12 12 C12 pulse Extension

13 LLong pulse

14 Q1 Output 1

15 Q2 Output 2

16 l sSupply voltage.