Notes, summaries, assignments, exams, and exercises for Design and Engineering for Primary education

Augmented Reality (AR) Fundamentals

AR is a technology that integrates digital information with the user’s real-world environment in real time, where virtual objects are spatially and temporally registered with physical objects and are interactive. Unlike Virtual Reality, which creates a fully artificial environment, AR enhances the real world by overlaying computer-generated content on it.

Characteristics of AR

AR is defined by the following three main characteristics:

• Combines Real & Virtual World: AR blends digital elements such as images, text, and 3D models with the real physical environment instead of replacing it.
• Interactive in Real Time: The AR system responds instantly to the user’s movement and actions, allowing users to interact

Electrical Safety and Circuit Troubleshooting

Is a JSA required for electrical circuit troubleshooting?

Yes. As an employer, you have a duty of care to prevent workplace injuries and illnesses and to provide safe systems of work as specified under Section 19 of the Occupational Safety and Health Act 1984.

Example of a JSA hazard control measure

Hazard: Extension cord on a wet floor.

Control Measure: Secure cords to walls and hang them away from water sources.

• Likelihood: Likely
• Consequence: Major
• Risk Rating: Critical

Testing devices and applications

Device: Multimeter.

Application: Perform a continuity test on a faulty circuit.

Live vs. de-energised testing

Circuits should generally be tested de-energised to eliminate the high risk of equipment damage...

Food Service Distribution Systems

Centralized Distribution

Preparations are served in a location attached to the place of manufacture. No transportation is needed.

Decentralized Distribution

Preparations are portioned in a distant area from production and can be transported in cars or thermal coolers.

Food Service Types

Centralized

À la carte: Customers choose their dish from a menu, which offers several options.

Self-service: The dishes are displayed on mobile thermal units (refrigerated or not) that can be table stands or counters, and the customer serves themselves.

Service Modalities

Self-Service: The customer goes to the table or buffet and serves themselves according to their preference, regarding variety and quantity. This service can be charged...

Artificial Intelligence (AI) is a branch of computer science that enables machines to simulate human intelligence. It allows computer systems to perform tasks like learning, reasoning, problem-solving, and understanding language.

How Artificial Intelligence Works

AI works by combining large datasets with advanced algorithms and iterative processing. The core mechanics of an AI system generally follow these steps:

• Data Collection: The system ingests vast amounts of data. This can be text, images, audio, or sensor information.
• Model Training: AI models use algorithms to analyze the data and identify underlying patterns or features.
• Model Improvement: During training, the system continuously adjusts its internal settings to minimize errors. This allows

Exergy Components: Fuel, Product, and Irreversibility

• Fuel (F): The total exergy (valuable energy) resources consumed by a specific component to perform its function.
• Product (P): The useful, high-quality energy output generated by that component.
• Irreversibility (I): The internal energy wasted or destroyed inside the component due to inefficiencies such as friction or heat loss.

Exergy Cost Calculation Algorithm

For the known exergy efficiency of particular components of the system, the algorithm for exergy cost calculation is presented below.

Incidence Matrix and Matrix Formulation

To determine the incidence matrix for the presented system and calculate the exergy cost of the flows, a mathematical matrix structure is implemented:

Incidence Matrix...

ISO/OSI model in fizični sloj

ISO/OSI sloji v protokolnem skladu od zgoraj navzdol: fizični sloj, povezovalni sloj, omrežni sloj, transportni sloj, sejni sloj, predstavitveni sloj, aplikacijski sloj.

Kakšno obliko imajo podatki na fizičnem sloju? Elektromagnetno valovanje, svetloba.

Kaj je naloga fizičnega sloja? Prenos bitov.

Katera naprava za podaljševanje omrežja deluje samo na fizičnem sloju? HUB.

Optična vlakna

Kateri pojav uporabljajo optična vlakna za prenos podatkov? Popolni odboj.

Kaj so večrodovna vlakna? Iz njih je sestavljen optični kabel.

Katere so slabosti optičnih vlaken? Cena, občutljivost, težko jih je spajati.

Kakšne so omejitve optičnih vlaken? Hitrost in dolžina.

Zakaj se uporablja mnogorodovno optično vlakno,

Multi-Client Chat Server and Client in Java

LeitorServidor (Server Reader)

public class LeitorServidor implements Runnable {

LeitorCliente (Client Reader)

public class LeitorCliente implements Runnable {

CSS Web Page Layout

The following stylesheet defines the layout and styling for the web page components:

#pagina { width: 1366px; height: 760px; } @font-face { font-family: 'Joystick'; src: url('letras/joystick'); } #entero { width: 780px; height: 720px; border: 2px solid black; border-radius: 10px; background-color: blue; margin-left: 300px; } #imagen { width: 780px; height: 100px; background-color: #1e90ff; border-radius: 10px; } #casillas { width: 780px; height: 30px; background-color: #cacaca; } #musica { width: 50px; height: 20px; border: 2px solid black; border-radius: 5px; margin-left: 100px; background-color: #40e0d0; float: left; } #peliculas { width: 59px; height: 20px; border: 2px solid black; border-radius: 5px; margin-left: 100px;

PEMPHIGUS

DEFINITION: "A very serious autoimmune disease caused by a disorder of cohesion between intraepidermal cells, resulting in blisters and painful erosions. It is a chronic, relapsing dermatosis, mainly affecting older people, with changes on the skin and mucous membranes. A very severe general condition, with periods of exacerbation alternating with remissions. There is no definitive cure; the disease is capricious and resistant."

TYPES:

• Pemphigus vulgaris;
• Pemphigus vegetans;
• Pemphigus foliaceus;
• Pemphigus erythematosus (Brasiliensis);
• Pemphigus chronicus familiaris benignus;
• Pemphigus herpetiformis;
• Grover syndrome.

Pemphigus vulgaris

Diagnostic criteria:

• Filled blisters with a thin roof, on unchanged skin
• Painful erosions
• Face, trunk, flexor surfaces
• Affected