Documents shared by Anónimo

Public & médias

• Le public est passé d’un rôle passif à un rôle proactif.

• Le public proactif choisit le contenu, le format, le moment et le mode de consommation.

• Le public peut participer à la production et à la diffusion des contenus.

• Interactivité : capacité du public à interagir avec le média et le contenu.

• Fragmentation du public : division du public en sous-catégories selon les usages, intérêts et plateformes.

Hybridation & transmédia

• Hybridation des contenus

DATABASE INTEGRATO : raccolta di dati, informazioni organizzate e gestite utilizzando il linguaggi di interrogazione SQL.

Perchè creare un database integrato ? La versione coerente e normalizzata di tutti i dati è utile in caso di grandi quantità di dati come nell'analisi dei Big data. Infatti l'integrazione consente di operare meglio attraverso operazioni sequel per confrontare diverse database 

step 1 : ricerca delle fonti : da fonti ufficiali come istituiti di statistico, e verificare se

1 Systems + signals + open/closed loop + elements + requirements

A system transforms input u(t) into output y(t). It can be continuous/discrete, linear/nonlinear, time-invariant/time-variant.
Signals: continuous/discrete, periodic/aperiodic, deterministic/random, energy/power signals.
Open loop: no feedback, control does not depend on output → simple but sensitive to disturbances/parameter changes.
Closed loop: uses feedback (compare reference r with output y, error e=r−y) → better accuracy

1 Relational DB design + FD + Normalization + keys + index + B-tree

Relational model stores data in tables (relations): rows = tuples, columns = attributes.
Key components: tables, attributes, tuples, constraints (PK/FK/UNIQUE/NOT NULL).
Mapping ER → relational: entity → table, 1:many → FK on many side, many:many → junction table, multivalued attribute → separate table.
Functional dependency (FD): X → Y means X uniquely determines Y (same X → same Y).
Armstrong axioms: reflexivity (if

Q1 (b) How can you map a conceptual model to a relational model?

Mapping a conceptual (ER) model to a relational model is done by:

Converting entities into tables

Converting attributes into columns

Defining primary keys for each table

Representing relationships using foreign keys

Q1 (c) What is the use of DML in DBMS?

DML (Data Manipulation Language) is used to retrieve and manipulate data in database tables.
Examples: SELECT, INSERT, UPDATE, DELETE.

(d) List two reasons why we may choose to define

Analys av När hundarna kommer av Jessica Schiefauer

I denna text ska jag analysera romanen ”När hundarna kommer” från 2015, skriven av Jessica Schiefauer. Boken handlar om Ester, en tonårstjej som bor i en liten stad, och hennes relationer till andra, bland annat hennes pojkvän Isak, familj och vänner. Parallellt får vi följa Anton, Isaks bror, som utvecklas mycket under berättelsens gång. Romanen tar upp flera viktiga teman, bland annat kärlek och beroende, våld och identitet. Och

Chapter -1

electric field:-the sphere arround a source change in which a test charge would experience a force is called electric field.

Electric field lines: An electric field is represented by same emajinary lines of force which are called electric field.

properties:-1)they are emajinary lines of force.

2)in case of positive source change they are readily directed outward.

3) they are not closed line.

mathematically define of electric field:-  the electric force per unit test charge is called