2020 June

Intermittent Fasting

Machine Learning Steps

Paper with Code

  • Spying coversation by watching the bulb lamp movement: Lamphone

Open Source

  • Taxipy an open source alternative to Uber/Gojek
  • Libre taxi open source to Uber Gojek

Kuliah

Sistem Avionik Pesawat

Sistem avionik pesawat merujuk pada berbagai piranti elektronika di dalam pesawat.

  1. Piranti Komunikasi
    1. VHF Radio 30-300 MHz modulasi AM
    2. HF Radio 3-30 MHz modulasi AM
    3. UHF Radio
    4. ICS (Komunikasi Intra Pesawat)
    5. ELT (Emergency Locketter Transmitter, Pemancar Lokasi Pesawat saat Darurat)
  2. Piranti Navigasi
    1. ADF (Penentu arah pesawat otomatik)
    2. RALT (Pengukur ketinggian pesawat)
    3. VOR (Penentu azimuth dan bearing pesawat)
    4. ILS (Informasi Pendaratan)
    5. TACAN (untuk Militer)
    6. GPS (Posisi pesawat)
    7. DME (Pengukur jarak pesawat)
  3. Piranti Instrumentasi
    1. EFIS (Informasi tampilan status penerbangan)
    2. FMS (Manajemen sistem penerbangan)
    3. Standby Attitude Instrument (Sistem Cadanga Independen)
    4. Engine and Fuel Instrument (Monitor mesin dan bahan bakar)
    5. ADC (Pengolahan data)
    6. FDR (Flight Recorder)
    7. CDR (Cockpit Recorder)
    8. AHRS (Penentu arah (heading), attitude dan simpangan (yaw))
    9. Weather Radar (Cuaca)
  4. Piranti advisory
    1. TCAS (Traffic Collision Avoidance System, peringatan penghindaran tabrakan antar pesawat)
    2. Mode-S Transponder (identifikasi dan penentuan posisi pesawat
    3. TAWS (Terrain Awareness and Warning Ssytem, peringatan dan penghindaran terhadap permukaan)

AHRS terdiri dari

  • 3 sensor gyro (angular: roll, pitch, yaw)
  • 3 sensor akselerometer (linear)
  • 3 sensor magnetometer (flux magnet bumi)

Heading pesawat

  • yaw (putar terhadap sumbu z, vertikal)
  • pitch (putar terhadap sumbu y, lateral)
  • roll (putar terhadap sumbu x, longitudinal)

Interesting Site

Ngrok

Ngrok is an alternative to port forwarding, expose your local to public

Canary Tokens

Suppose you have a situation like this. You want to be warned if someone access your file, your folder, your email, your image, etc. So you put a token, transparent in your file/folder/email/image, which will warn you if someone open it. That is how Canary Tokens work

Accuracy, Precision, Error

  • Accuracy is closeness of the measurements to a specific value
    • More commonly, it is a description of systematic errors, a measure of statistical bias; low accuracy causes a difference between a result and a "true" value. ISO calls this trueness.
    • the accuracy of a measurement system is the degree of closeness of measurements of a quantity to that quantity's true value
    • bias is the amount of inaccuracy
  • Precision is the closeness of the measurements to each other
    • Precision is a description of random errors, a measure of statistical variability.
    • The precision of a measurement system, related to reproducibility and repeatability, is the degree to which repeated measurements under unchanged conditions show the same results.
    • variability is the amount of imprecision

Accuracy has two definitions:

  • More commonly, it is a description of systematic errors, a measure of statistical bias; low accuracy causes a difference between a result and a "true" value. ISO calls this trueness.
  • Alternatively, ISO defines accuracy as describing a combination of both types of observational error above (random and systematic), so high accuracy requires both high precision and high trueness.

Accuracy and Precision

Learn more:

  1. POCD