- Go to Atlassian\Confluence\confluence\WEB-INF\classes folder
- Open confluence-init.properties file with a text editor in order to find the location of your home directory. The default location of the home directory in Windows is the following
`C:\Program Files\Atlassian\Application Data\Confluence`

# Skin depth

Equation of skin depth:

The higher the frequency the lower the skin depth.

The lower the frequency the higher the skin depth.

# TP-Link NC220 Day/Night Cloud Camera, 300Mbps, WI-FI

There are 3 ways to access your camera:

- tpCamera App (Android OS)
- IP address of the camera
- www.tplinkcloud.com

The firmware of the camera can be updated from tpCamera App.

# Twisted pair cable

When two wires are twisted inside the cable, they are called a twisted pair. By twisting the wires, the electromagnetic interference caused by the electrical current is greatly reduced. Most LAN cabling uses two twisted pairs – one for transmitting and one for receiving.

# Linear and Non-Linear Inductors

An ideal inductor would have zero capacitance and zero resistance.

The Figure below shows a graph of inductive reactance versus frequency . Inductive reactance increases linearly with frequency.

Figure: Inductive reactance vs frequency (ideal inductor)

A real inductor can be modeled by the following elements:

- a series inductor
- a series resistor or
- a parallel capacitor or : It is the distributed capacitance between the turns of the wire and is derived from the Self Resonant Frequency ().
- a parallel resistor : It represents the magnetic core loss of the inductor core.

The figure below shows a real-life impedance vs frequency graph.

Figure: Inductive reactance vs frequency (real inductor)

Self-Resonant Frequency (SRF) or in Hz: This is the frequency at which the inductance of the inductor resonates with the inductor’s distributed capacitance . Increasing or lowers . Decreasing or raises .

At

- the inductor will act as a pure resistor,
- the input impedance is at its peak,
- the Quality factor of the inductor is zero,
- the reactance of the inductor is zero,
- the capacitance is given by

At frequencies below the reactance is inductive and increases as the frequency increases.

At frequencies above the reactance is capacitive and decreases as the frequency increases.

# Εκθετική μορφή μιγαδικού αριθμού

,

– μέτρο ή απόλυτη τιμή του

, – γωνία ή όρισμα του

Ο τύπος του Euler επιτρέπει την έκφραση του μιγαδικού αριθμού σε εκθετική μορφή.

Άρα ο μιγαδικός αριθμός γράφεται

# Unified Modeling Language (UML)

The Unified Modeling Language (UML) is a graphical language for visualizing, specifying, constructing, and documenting the artifacts of a software-intensive system.

# Confluence license

How to find the Server ID

Confluence administration > go to “Administration” category and select “License Details” > Server ID

How to create the License Key

Log in to attlasian.com > Licences > Paste the Server ID > The License Key will be generated.

# Закон за пълния ток (Ampere’s Law)

Законът обвързва циркулацията на вектора на интензитета на магнитното поле по произволен затворен контур с пълния ток , който преминава през ограничената от контура повърхност. За избраната посока на обхождане на , .

Когато контурът обхвъща навивките на намотка с навивки, през които протича ток , пълният ток , където величината се нарича магнитодвижещо напрежение (magnetomotive force).

Ако пространството през което минава контурът се раздели на участъка, всеки с дължина , сечение , и магнитна проницаемост , такива, че във всеки участък интензитета на полето има постоянна стойност, законът за пълния ток приема вида:

С използване на известните връзки между интензитета на магнитното поле , неговата индукция и създадения магнитен поток , магнитодвижещото напрежение на източника се представя с израза:

# Self inductance of a solenoid

According to Faraday’s law:

The term in front of in the equation we call it self inductance of the solenoid: