Science and Technology (Part-II)

Additionally, they enhance mobile air-conditioning by managing humidity and improve industrial lubricants by reducing friction, controlling viscosity, and enhancing thermal stability.

Computer memory, often discussed in units like Kilobytes (KB) or Megabytes (MB), relies on a fundamental unit of digital information called the byte. Understanding what constitutes a byte is crucial for grasping computer storage concepts.
Defining a Byte
A byte is the standard base unit used to measure digital data. It is defined as a collection of 88 binary digits. Each binary digit is commonly referred to as a 'bit', which can exist in one of two states: 0 or 1. Here's a breakdown:

• Bit: The smallest unit of data in computing, representing a single binary value (either 0 or 1).
• Byte: A group of 8 bits. This grouping allows for a wider range of values to be represented.

For instance, a single byte can represent 256 different values (from 00000000 to 11111111 in binary). This is enough capacity to store a single character, like a letter or a symbol, using standard encoding schemes (e.g., ASCII).

• A digital library is a library in which collections are stored in digital formats (as opposed to print, microform, or other media) and accessible by computers. The digital content may be stored locally, or accessed remotely via computer networks. Thus, it can be available extra then internet also. Thus, statement 3 is wrong while 1 and 2 are correct.
• A smart card, chip card, or integrated circuit card (ICC), is any pocket-sized card with embedded integrated circuits. American engineers began developing digital technology in the mid-twentieth century. Digital technology enables immense amounts of information to be compressed on small storage devices that can be easily preserved and transported. Digitization also quickens data transmission speeds. Telecommunications has relied on digital methods to transmit messages.
• In the early 1980s, enhanced fibre optics enabled the development of digital communication networks. Communication satellites known as direct broadcast satellite (DBS) transmitted compressed digital signals for viewers to receive several hundred television programming choices.

• Adam Osborne, a British-American book publisher and computer designer, launched the Osborne 1 in April 1981 through his company, Osborne Computer Corporation.
• While earlier "portable" devices existed, the Osborne 1 was the first mass-produced, commercially successful portable microcomputer. It fundamentally changed perceptions of where computing could take place.
• It was designed to fit under an airplane seat. It featured a Zilog Z80 CPU, 64 kilobytes of memory, two 5¼-inch floppy disk drives, and a tiny, built-in 5-inch CRT monitor.
• The Osborne 1 popularized the idea that a single person could own and transport their work machine. It came bundled with valuable software (including WordStar and SuperCalc), making it a great value proposition for early personal computer users. It paved the way for the laptops and mobile devices we use today.
• Sir Ian Wilmut was the scientist who led the research team that achieved one of the most significant breakthroughs in 20th-century biology: the first successful cloning of a mammal using a mature, differentiated somatic cell.
• This experiment proved that a specialized adult cell (like a mammary gland cell, from which Dolly got her name) could be reprogrammed to create an entirely new, genetically identical organism. Before this, most scientists believed that only embryonic cells could be used effectively for cloning.
• The technique used was Somatic Cell Nuclear Transfer (SCNT). The nucleus (containing the DNA) from an adult sheep's cell was inserted into an unfertilized egg cell from which the nucleus had been removed. This reconstructed egg was then stimulated to divide and develop into an embryo, which was implanted in a surrogate mother sheep.
• The birth of Dolly in July 1996 (announced publicly in February 1997) generated intense global scientific discussion and ethical debates about the possibilities and implications of cloning technology, both for agriculture and human medicine. This research was foundational to later work in stem cell research and regenerative medicine.

• Communication technologies come in both wired and wireless forms, each with its own advantages.
• Fibre optic cables offer faster speeds and greater security, while satellite phones provide reliable connectivity in remote areas. Digital terrestrial television ensures better picture and sound quality, enhancing the viewing experience.
• Overall, these technologies continue to evolve, connecting people around the world more efficiently and effectively than ever before.

• In order to undergo the LASIK procedure, one should be at least 18 years old, as the vision of people younger than 18 usually continues to change.
• LASIK involves cutting of the cornea hence it may lead to a change in the shape of the cornea. Hence option 2 is correct.
• The FDA stipulates the correct minimum age of 18 years for most situations. Hence it cant be done at every age. hence option 4 is not correct.
• LASIK is a type of refractive surgery for the correction of myopia, hyperopia, and astigmatism.
• LASIK surgery is performed by an ophthalmologist who uses a laser or microkeratome to reshape the eye's cornea in order to improve visual acuity.
• For most people, LASIK provides a long-lasting alternative to eyeglasses or contact lenses Hence Option 3 is correct.

Wi-Fi-IEEE 802.11 is a set of standards for implementing wireless local area network (WLAN) computer communication in the 2.4, 3.6 and 5 GHz frequency bands.