Balder W. Holst

Hello there!

My name is Balder and this is my personal website. Here i write down what i learn to maybe help others some day. For now i will just act like people are reading my articles, and make them for fun.

This website has three main sections:

I write these articles for fun, and even though i try to make sure that they are correct, i am not a perfect human and there are sure to be mistakes. Below is a list of most recent articles in all categories.

Recent Posts

Loops in C++
Loops in C++ For Loops for(int i=0; i<10; i++){ // Run with i values rangeing from 0 to 9 } for (int i: {1, 2, 3}){ // Run assigning i to each value in the list, one by one } While Loops while(condition){ // Run while condition is true } do { // Run and keep running while condition is true } while(condition); Break and Continue WARNING: please be carefull with these, as they can greatly decrease code readability.
0001/01/01 · Notes
Lysets Hastighed
Lysets Hastighed $$c=299792458 \ \frac{m}{s}$$
0001/01/01 · Notes
Maps
Maps a map is another name for function A map is a way to translate between values in different spaces.
0001/01/01 · Notes
Maskemetoden
Maskemetoden Virker kun i Plane Kredsløb Electrical Engineering Principles & Applications, Global Edition.pdf>page=102 when several mesh currents flow through one element, we consider the current in that element to be the algebraic sum of the mesh currents. - > Electrical Engineering> Ide Find alle masker (“huller”/“vinduer”) i kredsløbet. Antag at strømmen går med uret rundt. En maske må ikke indehole andre masker. Opskriv en ligning for hver maske ved hjælp af KVL.
0001/01/01 · Notes
Massemidtpunkt
Massemidtpunkt Bestemmelse af massemidtpunktet $$x_{cm} = \frac{m_1x_1+m_2x_2+\dots+m_nx_n}{M}$$ $$y_{cm} = \frac{m_1y_1+m_2y_2+\dots+m_ny_n}{M}$$ $$z_{cm} = \frac{m_1z_1+m_2z_2+\dots+m_nz_n}{M}$$ $x_{cm}$ : Massemidtpunktets $x$-koordinat. $y_{cm}$ : Massemidtpunktets $y$-koordinat. $z_{cm}$ : Massemidtpunktets $z$-koordinat. $x_{1\dots n}$ : $x$-koordinaten for det $n$‘te objekts massemidtpunkt. $y_{1\dots n}$ : $y$-koordinaten for det $n$‘te objekts massemidtpunkt. $z_{1\dots n}$ : $z$-koordinaten for det $n$‘te objekts massemidtpunkt. $m_{1\dots n}$ : Masserne for alle objekterne. $M$ : Den totale masse. Kontinuert Legme Udregning af massemidtpunkt i en stang.
0001/01/01 · Notes
Massen af en elektron
Massen af en elektron Fysik_i_overblik.pdf>page=30 $$m_e=9.1094 \cdot 10^{-31}$$
0001/01/01 · Notes
Matched z-transformation
Matched z-transformation See slides. Poler og nulpunkter overføres direkte til z-domænet med formlen: $$z = e^{sT}$$ Procedure Find poler og nulpunkter Find normerede poler og nulpunkter Overfør poler og nul-punkter til z-domæne $$z=e^{sT}$$ Opskriv overføringsfunktionen og gang en konstant på. Find konstanten med ligningen: $$H(s)|{s=0} = H(z)|{z=1}$$ Opskriv den endelige løsning Eksempel på Procedure lektion8#page=1 Eksempel på Procedure af Kasper page=1#page=1"
0001/01/01 · Notes
Matricer
Matricer En matrix her $m$ rækker og $n$ søjler. $$ A_{m\times n} = \left( {\begin{array}{cccc} a_{11} & a_{12} & \cdots & a_{1n}\ a_{21} & a_{22} & \cdots & a_{2n}\ \vdots & \vdots & \ddots & \vdots\ a_{m1} & a_{m2} & \cdots & a_{mn}\ \end{array} } \right)$$ Se også bogen. Noter om Matricer list from #matricer sort file.name Scalar Multiplikation Gang alle elementer i matrixen med konstanten. Gange med matricer $$c_{ij} = \sum_{k=1}^n a_{ik} \cdot b_{kj}$$ $c_{ij}$ er altså prikproduktet af $A$’s række $i$ og $B$’s søjle $j$.
0001/01/01 · Notes
Matricer - Regneregler
Matricer - Regneregler $A_{n\times n}$ og $B_{n\times n}$ har benne en invers. $$(AB)^{-1} = B^{-1} \bullet A^{-1} \s \text{INVERS RÆKKEFØLGE!}$$ $$\left(A^{-1}\right)^{-1} = A$$ $A_{n\times n}$, $B_{n\times n}$ og $C_{n\times n}$ er matricer. Hvis $\rang(A) = n$ og $AB = AC$ så er $B=C$. Hvis $\rang(A) = n$ og $AB=\underline{0}$, så er $B=\underline{0}$.
0001/01/01 · Notes
Media Access Control
Media Access See slides. Tip CSMA/CD is the best, as it has the hightest throughput. Random Access See slides. All nodes can send whenever they want, therefore conflicts can occur. Pure ALOHA See slides. Time is divided into time slots, but the time slots are not synchronised between nodes. Each node sends all its data within a random time slot. This leads to collisions.between nodes.
0001/01/01 · Notes