Friday, August 28, 2026

Online text to speeach tools

 

[1] Free 500 letters. https://fish.audio/app/text-to-speech/   #e-mail

Arduino Sensors - Gas

 

 

References:

[1] gas sensors MQx https://naylampmechatronics.com/blog/42_tutorial-sensores-de-gas-mq2-mq3-mq7-y-mq135.html

[2] gas sensor MQ135 https://www.tecneu.com/blogs/tutoriales-de-electronica/mq135

[3] gas sensor MQ137 (Ammonia) https://circuitdigest.com/microcontroller-projects/arduino-mq137-ammonia-sensor 


Resources(wifi):

[1] https://mecatronica.saisac.pe/producto/modulo-esp-01-esp8266-wifi/

[2] https://www.electromania.pe/?s=ESP8266&post_type=product

[3] https://www.teslaelectronic.com.pe/producto/modulo-esp8266-serial-wifi/?srsltid=AfmBOoq-9awBhXa6sHpJDswF0XyhD_mICthqr3IEZgQzeOaCFI0GygXP


Wednesday, August 26, 2026

Setup Arduino IDE

 

avrdude: ser_open(): can't open device "/dev/ttyACM0": Permission denied

$ ls -l /dev/ttyACM* 

crw-rw-r-- 1 root dialout ... /dev/ttyACM0

Fix:

sudo chmod a+rw /dev/ttyACM0 


Resources:

[1] https://www.arduino.cc/en/software/

[2] Simulator https://www.tinkercad.com/ 

Thursday, August 20, 2026

Reference Network tools

 


Resources:

[1] https://www.vosviewer.com/download 

[2] https://www.vosviewer.com/documentation/Manual_VOSviewer_1.6.20.pdf

[3] https://api.crossref.org/swagger-ui/index.html  #how to query

How to run on PC/Linux

javaws file.jnlp

If not installed:

sudo apt install icedtea-netx


Sunday, August 09, 2026

Linux history issue

 

echo "HISTSIZE=$HISTSIZE"
echo "HISTFILESIZE=$HISTFILESIZE"

#update the .bachrc file
# Keep more commands in memory
HISTSIZE=10000
# Keep more (or unlimited) lines in the history file
HISTFILESIZE=100000
# or for effectively unlimited on Bash ≥4.3:
# HISTFILESIZE=-1


Git issues

Escenary:  You need to upload many files to github, then need to clone, add the files and upload from local, instead file by file.

 

cd Downloads/UnsaTesis/Waste/
ls
mkdir github
cd github
git clone https://github.com/fincahuanaco/solid_waste_peru.git
ls
cd solid_waste_peru/
ls
git add .
git commit -m "Add maps of Lima and Arequipa"
git config --global user.email "you@example.com"
git commit -m "Add maps of Lima and Arequipa" #after added files to directory
git push origin main
git config --global user.email "
you@example.com"
git push origin main
git config --global credential.helper store #store credentials on disk
clear
git push origin main
   

Writing tools

Change image size during paper writing (overleaf time compilation affected)

sudo apt install pngquant

pngquant --quality=90-100 budget_map.png  

pngquant --quality=85-95 waste_stress_result.png  #more aggressive

sudo apt install oxipng #does not installed for me
 

Bonus

Cut video using ffmpeg

ffmpeg -ss 00:30:30 -i DAIA-Mat-Sec2-S15.mp4  -c copy DAIA-Mat-Sec2-S15_output.mp4



 

 

 

 

 




Saturday, August 01, 2026

Voice enhacer free tools

Resources:

[1] https://voiceenhancer.ai/

[2] https://audioenhancerai.com/

Wednesday, July 29, 2026

Peruvian social cases

 

Caso Cantuta 90's

[1] https://www.infobae.com/america/peru/2022/07/23/masacre-de-la-cantuta-el-crimen-de-los-estudiantes-a-manos-de-asesinos-encubiertos-en-las-fuerzas-armadas/

[2] https://elpais.com/internacional/2023-05-29/caso-la-cantuta-los-restos-de-las-victimas-que-permanecieron-en-inglaterra-durante-30-anos.html

Monday, July 27, 2026

Peruvian Metrics

 

String search: ipsos Distribución Poblacional 2022

[1] 2010-2025 https://cpi.pe/banco-de-datos/estadisticas-poblacionales/ 


Air quality

[1] Map https://www.iqair.com/es/air-quality-map

[2] https://www.senamhi.gob.pe/?p=calidad-del-aire-pronostico 

[3] Air and others https://sinia.minam.gob.pe/portal/estadisticas-del-sector-ambiente/?marcoOrdenador=sinia&eid=45&tab=datos

[4] PM2.5, PM10, NO2 https://sinia.minam.gob.pe/portal/estadisticas-del-sector-ambiente/?marcoOrdenador=sinia&eid=148&tab=datos 




Monday, July 20, 2026

Social Indexes

 

[1] Crime Index https://www.numbeo.com/crime/rankings.jsp 

[2] Traffic Index https://www.numbeo.com/traffic/rankings_by_country.jsp

Sunday, July 19, 2026

Tracking Airplanes

 

 

Resources:

[1] https://objectiveunclear.com/

[2] Airplanes Live 3D https://objectiveunclear.com/airloom.html

[3] https://airplanes.live/

[4] Lima https://globe.airplanes.live/?icao=e80329

 

Thursday, July 16, 2026

Book about Physics with Deep Learning

2021 Physics-based Deep Learning

 

Resources:

[1] Web https://physicsbaseddeeplearning.org

[1] Book https://arxiv.org/abs/2109.05237

[1] https://github.com/tum-pbs/pbdl-book

 

Monday, July 13, 2026

GoogleStreetMap Edition

 

[out:json][timeout:60];
(
  node["natural"="tree"]({{bbox}});
);
out body;
>;
out skel qt;

 

Resources:

[1] Create queries and export as geojson https://overpass-turbo.eu/

 

Free Custom Maps

Google maps alternatives

 

Resources:

[1] JavaScript Lib for maps https://leafletjs.com/   #associate to OpenStreetMap

[2] Peruvian shape files https://www.geogpsperu.com

[3] OpenStreetMap editor https://josm.openstreetmap.de/

      java -jar  josm-tested.jar

Wednesday, July 01, 2026

Latex edition tools

Apps:

[Image to tex] https://latexconvert.com/

[Tex to image] https://www.bruot.org/tex2img/ 

[Solve eq]  https://notegpt.io/photo-math

https://latexeditor.lagrida.com/  #offline  

Friday, June 26, 2026

Install fortinet on Ubuntu 20

Step 1:

wget -O - https://repo.fortinet.com/repo/forticlient/7.2/ubuntu/DEB-GPG-KEY | gpg --dearmor | sudo tee /usr/share/keyrings/repo.fortinet.com.gpg
 

Step 2:

sudo vi /etc/apt/sources.list.d/repo.fortinet.com.list

deb [arch=amd64] https://repo.fortinet.com/repo/6.4/ubuntu/ /bionic multiverse

Step 3:

sudo apt install forticlient 



ICMC VPN

[1] https://atendimentosti.usp.br/otrs/public.pl?Action=PublicFAQExplorer;CategoryID=12

clicar em Configure VPN e na janela de configuração New VPN Connection preencher somente os campos abaixo:

  • Connection Name = VPN USP
  • Remote Gatewayorion.uspnet.usp.br
  • marcar a opção Customize port = 31443
  • em Authentication marcar a opção Save login
  • em Username digitar o Número USP e clicar em Save
  • abrirá a tela de login e no campo Password digitar a senha única e clicar em Connect
  •  

 

 

Super Resolution topic

 

References:

[1] github https://iterative-refinement.github.io/


[2] Image Super-Resolution via Iterative Refinement https://arxiv.org/abs/2104.07636

 

 

Thursday, June 18, 2026

Movil Tracer

Claro - Perú

[1] https://cuenta.claro.com.pe/DirectorioAbonadosMovil/servlet/directorioAbonados

 

Slides animation online

      [1] Slides +Animation https://slidespeak.co/free-tools/animate-slides-with-ai  [2] Slides to mp4 https://slidespeak.co/free-tools/conv...