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Dagoberto Sánchez Cartes | Industrial Maintenance Engineer

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Curriculum Vitae: Dagoberto Sánchez Cartes

Contact Details

Phone: +56 9 5318 6212

Email: [email protected]

Professional Summary

Industrial Maintenance Technician with extensive experience in mining projects. I have experience in mechanical maintenance, equipment assembly, and conveyor systems. I am a hardworking, reliable, and safety-oriented professional. Currently, I am studying Industrial Maintenance Engineering to improve my technical and management skills.

Professional Experience

Mechanical Technician M1

MCN – Maestranza y Construcciones Norte Ltda.
2019 – 2026

  • Industrial mechanical maintenance.
  • Equipment pre-assembly.
  • SMAW welding.
  • HDPE pipe thermofusion.
  • Safety procedures.

Mechanical Technician M1 – Structures

Montaje Industrial

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Essential C Programming Exam Questions and Solutions

Posted by Anonymous and classified in Computers

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x4jbIeyLsADAAAAAElFTkSuQmCC

Store Fibonacci Series in an Array

Exam Source: 2024 Q6(b)

Note: fib[0]=0, fib[1]=1, fib[i] = fib[i-1] + fib[i-2] for i >= 2.

#include <stdio.h>

int main() {
    int n, i;
    printf("How many terms? ");
    scanf("%d", &n);
    int fib[n];
    fib[0] = 0;
    if (n > 1) fib[1] = 1;
    for (i = 2; i < n; i++)
        fib[i] = fib[i-1] + fib[i-2];
    printf("Fibonacci series: ");
    for (i = 0; i < n; i++)
        printf("%d ", fib[i]);
    return 0;
}

Dynamic Memory Allocation and Average Calculation

Exam Source: 2024 Q7(c) / 2025 Q6(a) — Repeated both years!

Note: malloc returns void*, cast to int*. Always free() after use. If malloc returns NULL, memory allocation failed.

#include <stdio.h>
#include <stdlib.h&
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Essential CSS and HTML Techniques for Web Development

Posted by Anonymous and classified in Computers

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Understanding CSS text-overflow

The text-overflow property in CSS specifies how overflowed content that is not displayed should be signaled to the user. It works only when text exceeds the container size.

Required Conditions

To use text-overflow, the following properties must be applied:

  • overflow: hidden;
  • white-space: nowrap;
  • Fixed width

Values of text-overflow

  • clip: Default behavior; cuts off text without showing any symbol.
  • ellipsis: Shows “...” at the end of truncated text.
<style>
.clipText { width: 200px; white-space: nowrap; overflow: hidden; text-overflow: clip; border: 1px solid #000; }
.ellipsisText { width: 200px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; border: 1px solid red; }
</style>
<div class=
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Essential Web Development: JavaScript, jQuery, and CSS Tips

Posted by Anonymous and classified in Computers

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Use of Alert Box

An alert box is a JavaScript popup dialog box used to display messages or warnings to the user.

Uses of Alert Box

  • To display information messages
  • To show warning messages
  • To show error messages in form validation
  • To notify users about system events
  • Used for debugging purposes

JavaScript Program using RegExp Object

Definition: A Regular Expression (RegExp) is an object used to define a search pattern and perform matching operations on strings.

let text = "My email is [email protected]";
let pattern = /[a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,}/;
let result = text.match(pattern);
if(result) { alert("Email found: " + result); } else { alert("No email found"); }

HTML and JavaScript Prompt Demo

<!DOCTYPE html>
<html>
<head&
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XML Standards: XSD, XSLT, and DTD Implementation

Posted by Anonymous and classified in Technology

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XML and XSD Fundamentals

XML is used for:

  • Data storage and transport
  • Platform-independent data exchange
  • Web services communication (SOAP, API)
  • Configuration files (Android apps, software settings)
  • Structured document representation

XML File Example

This example includes a complex type, attributes, and specific data types:

<university>
  <student id="S101">
    <name>Rajan Pokhrel</name>
    <age>22</age>
    <dob>2003-05-10</dob>
    <address>Kathmandu</address>
  </student>
</university>

XSD (XML Schema Definition)

The following snippet defines the structure for the student element:

<xs:element name="student">
  <xs:complexType>
    <xs:sequence>

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Java Backtracking Algorithms: Sudoku, Knapsack, and Tasks

Classified in Computers

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Sudoku Solver Implementation

private boolean isValid(int r, int c, int n) {
  boolean valid = true;
  int sr, sc, fr, fc;
  for (int i = 0; i < 9 && valid; i++) {
    if (i != r) if (grid[i][c] == n) valid = false;
    if (i != c) if (grid[r][i] == n) valid = false;
  }
  if (valid) {
    sr = (r / 3) * 3; fr = sr + 3; sc = (c / 3) * 3; fc = sc + 3;
    for (int i = sr; i < fr && valid; i++) {
      for (int j = sc; j < fc && valid; j++) {
        if (grid[i][j] == n) valid = false;
      }
    }
  }
  return valid;
}

private boolean solveRec(int row, int col) {
  boolean solved = false;
  if (row == 9) solved = true;
  else {
    if (grid[row][col] == 0) {
      for (int i = 1; i < 10; i++) {
        if
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Mastering English Inversion and Business Vocabulary

Classified in Arts and Humanities

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English Inversion Structures

1. Inversion with Negative Expressions

Structure: Expression + Auxiliary + Subject + Verb

  • At no time / Under no circumstances: Used for emphasis.

2. Inversion with Only

Structure: Only + Time Phrase + Auxiliary + Subject + Verb

  • Examples: Only when, Only then, Only later.

3. Inversion with Not

Structure: Not + Phrase + Auxiliary + Subject + Verb

  • Examples: Not until, Not only... but also, Nowhere.

4. Inversion with Adverbs

Structure: Adverb + Auxiliary + Subject + Verb

  • Examples: Never, Rarely, Seldom, Hardly ever.

5. Event-Sequence Inversion

Structure: Little + Auxiliary + Subject + Verb

Structure: No sooner/Scarcely/Barely + Had + Subject + Past Participle + Than/When + Verb

6. Inversion with So and Such

  • So: So + Adjective + Was/
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Hotspot, Broadband, Digital Payments & Cybersecurity Terms

Posted by Anonymous and classified in Language

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1. Hotspot and Broadband (with Examples)

  • Hotspot: A hotspot is a wireless access point created using a mobile phone or router to share internet access over Wi-Fi1. It allows multiple devices to connect simultaneously2. For example, turning on the hotspot on a smartphone enables a laptop to access the internet3.
  • Broadband: Broadband refers to high-speed, always-on internet delivered through DSL, fiber optics, or cable networks4. It supports activities like streaming, online classes, and gaming5. Examples include Airtel Xstream Fiber and Jio Fiber services provided for homes and offices6.

2. ISP and Its Role

ISP (Internet Service Provider): An ISP is a company that supplies internet connectivity to users7. The ISP assigns IP addresses to devices,

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Wireless Communication Principles and System Formulas

Posted by Anonymous and classified in Electronics

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!!!!GENERAL!!!! a mod b = a - b * floor(a/b) x dBm = 10^(x/10) mW 10log(10 (mW) ) = 10 dB
!!PHY 2!! VARIABLES: P_r = Receiving power (W/mW) P_T = Sending power (W/ mW) G_T = Sending antenna gain G_R = Receiving Antenna Gain H_T = Sending antenna height (m) H_R = Receiving Antenna height (m) d = transmission distance (m) λ = c/f = wavelength (m) f = frequency (Hz) c = Speed of light = 3 * 10^8 (m/s) d_break = break point distance (m) N_T = number of transmitting antennas N_R = number of receiving antennas v = velocity (m/s)
Free space Path Loss (Friis Equation): P_R = P_T * G_T * G_R * (λ / (4πd))^2 unit antenna gain is 1. (IF isotropic antenna (theory) P_R = P_T * (c / (4πdf))^2 )
P_r / P_t = Total Path loss (db) TWO RAY: Time between

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Multivariable Calculus and Vector Analysis Formulas

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Gradient: \nabla f = \langle f_x,\ f_y,\ f_z\rangle Directional derivative (unit vector u): D_uf = \nabla f\cdot u Unit direction from A→B: u = \frac{B-A}{\|B-A\|} Tangent plane to z=f(x,y): z - z_0 = f_x(x_0,y_0)(x-x_0)+f_y(x_0,y_0)(y-y_0) Critical points: Solve f_x=0, f_y=0. D = f_{xx}f_{yy} - (f_{xy})^2 Min if D>0,f_{xx}>0. Max if D>0,f_{xx}<0. Saddle if D<0.

General double integral: Type I (y inner): \int_a^b \int_{g_1(x)}^{g_2(x)} f\, dy\, dx

Type II (x inner):

\int_c^d \int_{h_1(y)}^{h_2(y)} f\, dx\, dy

Polar:

x = r\cos\theta,\ y=r\sin\theta,\ dA=r\,dr\,d\theta

Circle: 0\le r\le R.

Line y=mx → \theta=\arctan m.

Region must be continuous in θ.

🔷

3. TRIPLE INTEGRALS

Cylindrical:

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