Human Impact on the Environment and Climate Change
Human Evolution and Environmental Impact
Our species, Homo sapiens, has evolved through the development of mind and culture, creating the science and technology needed to adapt nature to our needs. Thanks to tools and machines, we have acquired a tremendous capacity to transform nature, far exceeding the scale of biological evolution. Humans have replaced biological evolution with culture.
Environmental Problems in History
Environmental problems may seem new, but archaeological remains of ancient civilizations
Read MoreManufacturing Processes
Manufacturing Processes: An Overview
What is a Jigsaw?
A jigsaw is a saw with a straight blade that moves up and down. Accessories can be used for various applications, including drilling.
What are Common Machining Operations?
Common machining operations include sawing, grinding, sanding, turning, and milling.
What are Lathes and Milling Machines Used For?
Lathe: Used for making cylindrical parts.
Milling Machine: Used for shaping complex pieces of metal or other materials.
Types of Manufacturing Processes
Manufacturing
Read MoreVenezuela’s Hydrographic Basins: Red River, Slope, and Atlantic
Red River, Slope, and Atlantic Basins
A river is a set of surface water courses, streams, and rivers channeled that pour their waters into a river, lake, or sea.
Orinoco Basin
The Orinoco basin has a length of 880,000 km² and 640,000 km² are within our territory. The Orinoco River is 2150 km long, extending from the thin bill Chalbaud to the Atlantic. The river in its upper course presents a series of rapids (Atures and Maypures being the largest). In its course, there are 574 islands (the largest
Read MoreUnderstanding Steel: Properties, Manufacturing, and Iron-Carbon Alloys
The properties of a metal depend on the size and arrangement of its grains (granular structure). This structure is very important.
Types of HSS Steel
Microalloyed steel, dual phase steels, rephosphorized steels, bake hardening steels, IF steels, TRIP steels.
Active Materials
The most remarkable property of active materials lies in their response to specific stimuli. These materials have varying properties and change automatically.
Physical Properties
- Fusibility: The property of metals to liquefy under
Landforms: Classification and Characteristics
Relief is the aspect of the land surface, influenced by the biota.
Descriptive Classification of Landforms
Landforms are classified by their appearance. This classification uses terms such as:
- Mountain: Isolated relief that has a large gap between its base and the surrounding region.
- Hill: Isolated relief with little difference in elevation.
- Valley: A generally low-lying area that has narrow, steep walls on either side.
- Plateau: Isolated, elevated, flat relief.
- Terraces: Graduated relief.
Major Landforms
The
Read MoreMicropiles: Advantages, Uses, and Applications
Micropiles: are structural elements that transmit the load from one structure to deeper soil layers.
Advantages: Speed, economy and minimal discomfort compared to other works implementing systems. Facilidad inclined angles. The drill is very similar to that of a survey. Because of its thinness works almost exclusively by stem so the tip rests in a more compact layer.
Disadvantages: The relationship between the cost and the maximum load is greater in a micropile in a pile. No have a good performance