In modern warfare, Aegis ships play a critical role in national security with their advanced phased-array radar to quickly detect and intercept a wide range of targets and missile defense systems. This allows countries to prepare for military conflicts and missile threats.   In recent years, the international situation has been characterized by frequent wars and military tensions, with...

This course provides an overview of the disciplines of textiles, fashion design, and merchandising, and how fashion business combines fashion marketing, retailing, social psychology, and information technology to understand consumer behavior and create successful strategies for the global marketplace.   The study of apparel is relatively familiar to us compared to other disciplines. However...

Silver nanotechnology is revolutionizing electronics and healthcare, but it also raises environmental and health risks. Whether these technologies will bring positive change to humanity, or create new challenges, needs to be debated.   The word “nano” is everywhere these days. Nanotechnology has been applied in a wide variety of fields, and it has penetrated into our daily lives. From...

Genes are DNA chains that encode proteins and play a key role in determining phenotype. Although some scholars emphasize the influence of the environment, from an evolutionary biology perspective, genes are still the key to phenotype determination. The environment can influence gene expression, but without genes, there can be no phenotype. Furthermore, through various genetic interactions, genes...

Electricity is essential to modern society, and without it, everything from transportation, the economy, and military security would come to a standstill. Electrical engineering is an important discipline that studies electrical and magnetic phenomena to solve these problems and support our daily lives through the efficient use of energy and the design of electronic devices.   Electricity...

Organ transplantation has been a major breakthrough in the treatment of disease, but it also raises social issues such as organ supply and demand imbalances, rejection, and illegal organ trafficking, as well as human uniqueness and ethical controversies. Ethical and policy discussions, along with advances in immunosuppressive drugs, are needed to address these issues.   Organ transplantation...

This article explains how objects float and sink in water, and specifically how submarines use buoyancy tanks to control their depth in the water. It covers how buoyancy principles in the natural world are related to how submarines function.   If you put a rubber duck in the water in a bathtub, it will quickly float back up. However, if you put your body in the water of a bathtub, it will...

In the 1989 movie Back to the Future Part II, hoverboards went from being a fanciful invention to a reality. The technology, which uses the repulsive force of superconductors and magnets, is still far from being practical, but it could be a revolutionary form of transportation in the future.   Back to the Future Part II, released in 1989, follows the main character as he travels in a time...

This article begins with the definition and origins of electricity, the phenomenon first discovered by the ancient Greek philosopher Thales, the invention of the voltaic cell that made electricity practical, and the development of electric current, motors, and communication technology. It also discusses how the study of electricity and electronics will continue to improve our lives.   Today...

Human memories are formed through the workings of the nervous system, and how long they last depends on repetitive stimuli and changes in synapses. Short-term memories are chemical changes, but when they are converted into long-term memories through repetition, structural changes occur in the nerve cells that make them last longer.   They say that humans are animals of forgetfulness. Some...