Building a tall building with a 3D printer is certainly an impressive achievement. 3D printing technology has the potential to revolutionize construction, offering efficiency, speed, and resource savings. Taking 900 hours to build the world’s tallest building with this technology is a very reasonable time frame, considering the complexity of the project and the technical challenges involved. This type of advancement in construction could pave the way for a new era of architecture and engineering, with more efficient and sustainable structures.

Mobile project

A “mobile project” can refer to several things, depending on the context. It can be a project that is on the move, not tied to a fixed location, or it can refer to a project using a mobile vehicle or equipment.

1. **Project on the Move**: This could be a project that involves actions or activities that take place in multiple locations, rather than being concentrated in one specific location. For example, a traveling education program that visits multiple communities to offer classes or workshops.

2. **Mobile Vehicle Project**: Can also refer to a project that involves creating or adapting vehicles to perform specific activities. For example, a mobile library project that uses a bus or van to take books to areas where there are no libraries.

3. **Experimental or Temporary Project**: Sometimes, “traveling project” is used to describe a project that is in an experimental or temporary phase, without a fixed location. For example, a temporary art installation that travels from city to city.

If you have a specific context in mind, I can provide more information about how this term is applied.

Architectural revolution

An “architectural revolution” refers to significant and innovative changes in the way buildings are designed, constructed, and used. These changes can occur due to technological advances, new materials, new design approaches, changing social or environmental needs, among other factors.

Some examples of architectural revolutions throughout history include:

1. **Gothic Architecture**: In the Middle Ages, Gothic architecture introduced techniques such as pointed arches, ribbed vaults and stained glass, allowing for taller, more slender buildings, such as Gothic cathedrals.

2. **Modern Movement**: In the 20th century, the Modern Movement in architecture emphasized simple lines, geometric shapes, the use of industrial materials like steel and concrete, and a functionalist approach. Architects like Le Corbusier and Ludwig Mies van der Rohe were pioneers of this movement.

3. **Sustainable Architecture**: In recent years, there has been a revolution in architecture geared towards sustainability, with an increasing focus on energy efficiency, use of eco-friendly materials, climate-oriented design and integration with the natural environment.

4. **Digital Technology and Advanced Manufacturing**: Advances in digital technologies such as 3D modeling, 3D printing, and digital manufacturing are enabling new ways of designing and constructing buildings, leading to a revolution in parametric architecture and generative architecture.

These are just a few of the many architectural revolutions that have shaped history and will continue to influence the field of architecture in the future. Each of these revolutions has brought new ideas, techniques, and approaches that have transformed the way we view and interact with the built environment.