Database Management System (DBMS)
A software package/system to facilitate the creation and maintenance of a computerized database.
How Data is stored in DB?
Tables (Rows & Columns)
How tables relate to one another
Tables in a database relate to each other using keys:
Primary Key (PK): Uniquely identifies a row in a table.
Foreign Key (FK): Links one table to another.
What is a record in a table?
(also called a row) is a single entry that contains data for each column in the table.
A constraint
a rule...
1A Linia długa jest rodzajem obwodu o parametrach rozłożonych. Zbudowana z dwóch lub więcej równoległych przewodów. Linia długa to linia, której długość jest porównywalna lub większa od fali EM.1B Parametry falowe: stała propagacji [1/km], współczynnik tłumienia [Np/m], współczynnik opóźnienia fazowego [rad/m], impedancja charakterystyczna [ohm], długość fali [m], prędkość fali [km/s].2A Linia długa niezniekształcająca to taka, która nie powoduje zniekształcenia...
Definition:
A mainframe architecture is a centralized computing model where a large, powerful computer performs all processing and users access it through dumb terminals.
Key Points:
Expensive and large systems
Time-sharing introduced
Dumb terminals had no processing power
Definition:
Client–server computing is a model where client machines perform some processing while servers handle...
9.1-Д 2-А 3-Б 4-В
1(a) Education as a Process: Education is a dynamic, lifelong journey where a person’s behavior is modified through experience. It is not just a destination (degree) but a continuous process of growth.
1(b) School as a Miniature Society: John Dewey called school this because it reflects the real world. Students learn social rules, cooperation, and diversity on a small scale before entering adult society.
1(c) Balanced Curriculum: A curriculum that gives equal importance to all aspects of...
8.56 Consider the data displayed in Exercise 1.20 on page 31. Construct a box-and-whisker plot and comment on the nature of the sample. Compute the sample mean and sample standard deviation. 8.57 If X1, X2,...,Xn are independent random variables having identical exponential distributions with parameter θ, show that the density function of the random variable Y = X1+X2+···+Xn is that of a gamma distribution with parameters α = n and β = θ. 8.58 In testing for carbon monoxide in a certain brand...
Lost Spring
Q1. Describe the miserable plight of the people of Firozabad.
Or
Describe the bangle makers of Firozabad. How does the vicious circle of the sahukars and the middlemen never allow them to come out of poverty?
Or
Write briefly on the hazards of working in the glass bangle industry.
Or
Describe the difficulties that the bangle makers of Firozabad face in their lives.
Or
The life bangle makers of Firozabad was full of obstacles which forced …
Ans:
Every other family in Firozabad is engaged
1. Vznik kmitania v oscilačnej sústave
Ideálny LC obvod (netlmené kmity): C sa nabije na U₀ | pripojením L sa C vybíja cez L | energia sa presúva medzi elektrickým poľom C a magnetickým poľom L | pri Uc = 0 je prúd maximálny, pri Uc = ±U₀ je prúd nulový | podľa Lenzovho zákona sa C nabíja opačnou polaritou | proces sa periodicky opakuje | bez strát → amplitúda je stála | netlmené harmonické kmity | uC = U₀·cos(ωt) | i = I₀·sin(ωt) | prúd oneskorený za napätím...
Semiconductor electronics -
Semiconductor - These materials whose electrical conductivity lies between conductor and insulator are called semiconductors.
At absolute zero they behave as insulators and at room temperature they behave as conductors.
Eg: Ge, Si, GaAs, CdS, CdSe, InP etc.
Classification of solid on the basis of energy band theory-
-In solids there are three energy bands.
-The lower band is completely filled by electrons called valence band (VB).
-The upper band is called conduction