The precautionary principle is a fundamental approach used in decision-making, especially in environmental policy, public health, and safety regulation. It is based on the idea that in the face of uncertainty or potential risks, especially those that could cause harm to the public or the environment, proactive measures should be taken to prevent harm before it occurs, rather than waiting for scientific certainty about the risks involved.

Ridders' method is a numerical method used to find roots of a continuous function. It belongs to the class of root-finding algorithms and is particularly useful for functions that are well-behaved around the root. The method is an extension of the secant method, which is itself a derivative-free root-finding algorithm.

Web presence refers to the online visibility and accessibility of an individual or organization through various digital platforms. It encompasses everything that represents a person or business on the internet, including websites, social media profiles, blogs, online directories, and any other online content that can be discovered through search engines or shared by users.

The 21st century has seen significant advancements in robotics, characterized by rapid development in various fields. Here are some key trends and breakthroughs in robotics during this century: 1. **Artificial Intelligence Integration**: The incorporation of AI and machine learning has enhanced the capabilities of robots, enabling them to learn from experience, recognize patterns, and perform complex tasks autonomously. 2. **Collaborative Robots (Cobots)**: Development of robots designed to work alongside humans in shared spaces.

The 1930s was a pivotal decade in the history of robotics, marked by significant developments in the field of automation and the conceptualization of robotic machines, although the term "robot" itself was not widely used until later. Here are some key developments and influences from that era: 1. **The Term "Robot"**: The word "robot" was introduced by Czech writer Karel Čapek in his 1920 play "R.U.R." (Rossum's Universal Robots).

The 1960s was a pivotal decade in the development of robotics, characterized by significant advancements in technology and the conceptualization of robots as we understand them today. Here are some of the key developments and highlights from that era: 1. **The Birth of Industrial Robots**: The first industrial robot, Unimate, was developed by George Devol and later commercialized by Victor Scheinman.

The 1970s was a pivotal decade in the field of robotics, marked by significant advancements in technology and research that laid the groundwork for modern robotics. Here are some key developments and trends from that period: 1. **Early Industrial Robots**: The 1970s saw the introduction of some of the first industrial robots, which were primarily used in manufacturing. Notable examples include Unimate, created by George Devol and later produced by General Motors.

In the context of robotics, the year 2017 marked several significant developments, advancements, and events that contributed to the field's growth and innovation. Some notable highlights from that year include: 1. **Advancements in AI and Machine Learning**: The integration of artificial intelligence (AI) with robotics continued to accelerate in 2017, enhancing the capabilities of robots in terms of perception, decision-making, and autonomous operations.

The year 2018 was significant for robotics, marked by advancements in various fields, including industrial automation, healthcare robotics, and artificial intelligence integration in robotic systems. Here are some key trends and developments that characterized the robotics landscape in 2018: 1. **Increased Automation in Industry**: Many manufacturing sectors accelerated their adoption of robots, particularly collaborative robots (cobots) that work alongside human workers. This trend was fueled by a desire for greater productivity and safety in workplaces.

The year 1991 was significant in the field of robotics for several reasons, particularly in the advancements in robot technologies, research, and applications. Some notable events and developments from that year include: 1. **Competitions and Challenges**: The 1990s saw the rise of various robot competitions, including the first RoboCup in 1997, which aimed to advance the field of robotics and artificial intelligence through competitive soccer games.

In the context of robotics, 1999 was a notable year for several reasons, particularly in the fields of research, competitions, and technological advancements. Here are a few highlights from that year: 1. **RoboCup**: The RoboCup initiative, which began in the mid-1990s, continued to gain traction.

The term "2001 in robotics" could refer to several different contexts depending on what you're specifically interested in. However, one of the most notable references that may come to mind is the film "2001: A Space Odyssey," directed by Stanley Kubrick and released in 1968. This movie featured HAL 9000, an advanced artificial intelligence and robot that plays a central role in the story.

In the context of robotics, the year 2005 saw several significant developments and events. While it wasn't a standout year in terms of groundbreaking inventions, it was part of a trend of increasing interest and investment in robotics. Here are a few highlights from that period: 1. **Autonomous Vehicles**: The DARPA Grand Challenge in 2005 attracted considerable attention as teams competed to develop fully autonomous vehicles.

Educational robots are robotic devices specifically designed to facilitate learning and teaching in various educational settings. They are often used to introduce concepts such as programming, mathematics, science, engineering, and problem-solving skills to students of different age groups. Here are some key features and benefits of educational robots: 1. **Interactive Learning**: Educational robots promote interactive learning experiences, allowing students to engage actively with the material as they build, program, and experiment with the robots.

The year 2013 was notable in robotics for several reasons, with advancements across various fields including research, industry applications, and public interest. Here are some key highlights from that year in robotics: 1. **RoboCup 2013:** The international robotics competition held in Eindhoven, Netherlands, showcased advancements in robot soccer, rescue, and industrial robots. The event emphasized robotics in sports and competition, aiming to promote research and education in robotics and AI.

"Robots by fuel" typically refers to the classification of robots based on the type of energy source they use to operate. Here are some common categories: 1. **Electric Robots**: These are powered by electric motors and batteries. They are widely used in various applications, including industrial automation, consumer electronics, and service robots. 2. **Hydraulic Robots**: These robots use hydraulic fluid to transmit power, allowing for strong and precise movements.

Industrial robots are automated machines that are designed to perform tasks in manufacturing and production environments. These robots are typically programmable and can be used for a wide range of applications, including assembly, welding, painting, packaging, and material handling. They are equipped with various tools and sensors that enable them to interact with their environment and carry out their tasks with precision and efficiency.

Micro robots are tiny robots typically measuring in the micrometer to millimeter range. These robots are designed to perform specific tasks at a very small scale, often requiring precision and dexterity that larger robots cannot achieve. The applications of micro robots are diverse and can include: 1. **Medical Applications**: Micro robots can be used for targeted drug delivery, minimally invasive surgeries, and even cellular manipulation.

"Online robots" generally refers to automated programs or scripts that operate on the internet. They can serve various purposes, including but not limited to: 1. **Web Crawlers**: These are automated bots that browse the web and index pages for search engines like Google. They help in gathering data from websites to improve search results. 2. **Chatbots**: These are AI-driven programs designed to simulate conversation with users.

A rocket launcher is a device or system designed to launch rockets into the air, primarily for military purposes or as part of space exploration missions. Rocket launchers can vary significantly in design, size, and function, but they generally fall into the following categories: 1. **Military Rocket Launchers**: These are used to fire unguided or guided rockets at ground or aerial targets.