GC: n CT: Before we can measure or forecast Internet Usage, we must first answer a basic question: Who is an Internet user? Research firms, analysts, consultancies and other sources all disagree on how to answer this seemingly simple question. The ITU subscribes to the definition of an Internet user

GC: n CT: The ultimate complexity of design and analysis of stresses is attained in arch and dome dams. These dams are thin, curved structures commonly containing reinforcement, either steel rods or prestressed steel cables the volume of concrete required is much less than for gravity and gravity arch dams,

GC: n CT: The thermal excitation of a carrier from the valence band to the conduction band creates free carriers in both bands. The concentration of these carriers is called the intrinsic carrier concentration, denoted by ni. Semiconductor material which has not had impurities added to it in order to

GC: n CT: One of Tesla’s legacies (and that of his business partner George Westinghouse, boss of the Westinghouse Electrical Company) is that most of the appliances we have in our homes are specifically designed to run from AC power. Appliances that need DC but have to take power from

GC: n CT: Ions: When atoms have an equal number of protons and electrons, they are neutral and have no electrical charge. However, both man-made and natural forces can act on atoms and result in a gain or loss of electrons. When a neutral atom has lost an electron (which

CG: n CT: It is also necessary to introduce elements of neutral atmospheric and magnetospheric physics since the ionosphere is very much affected by processes that originate in these two regions. The ionosphere coexists with the upper portion of the neutral atmosphere and receives considerable energy and momentum from the lower

GC: n CT: Hydropower is created by running water through a hydraulic turbine that spins and drives a generator shaft to create electricity. Most small hydro projects, also called micro-hydro, divert a portion of a river or creek’s flow, or are constructed on established channels, such as irrigation ditches. S:

GC: n CT: Isobutanol is a promising candidate as second-generation biofuel and has several advantages compared to bioethanol. Another benefit of isobutanol is that it is already formed as a by-product in fermentations with the yeast Saccharomyces cerevisiae, although only in very small amounts. Isobutanol formation results from valine degradation

See isobutanol

GC: n CT: Joule, unit of work or energy in the International System of Units (SI); it is equal to the work done by a force of one newton acting through one metre. Named in honour of the English physicist James Prescott Joule, it equals 107 ergs, or approximately 0.7377

GC: n CT: Joule effect and Joule’s law are any of several different physical effects discovered or characterized by English physicist James Prescott Joule. These physical effects are not the same, but all are frequently or occasionally referred to in literature as the “Joule effect” or “Joule law” These physical

CG: n CT: What, exactly, is a rainforest? And what’s the difference between a rainforest and a jungle? A jungle is an area that’s densely overgrown with trees and tangled vegetation, usually in a warm place with a high rainfall. Their floors are thick with vines, shrubbery, and tons and tons of

CG: n CT: During the past few years, the concept of “just transition”, as used in relation to climate change mitigation, has increasingly gained attention. But while there is no shortage of talk and references to just transition, what is this issue really about? What do we mean by just

GC: n CT: A Kaplan turbine is basically a propeller with adjustable blades inside a tube. It is an axial-flow turbine, which means that the flow direction does not change as it crosses the rotor. Figure 1 shows a simplified Kaplan turbine. The inlet guide-vanes can be opened and closed

GC: n CT: The name Triassic derives from the division of the sediments into three typical stages: Bunter, Muschelkalk and Keuper. The basin containing these sediments, reaching from the North Sea area in the north to the Iberian Penninsula in the south and from the Paris Basin in the west

See HUMANTERM: https://humantermuem.es/keystone-species

GC: n CT: Electricity used at any moment is measured in watts. It only makes sense that a 100-watt bulb uses 100 watts of electricity. A desktop computer uses about 65 watts and a central air conditioner uses about 3,500 watts. Since all of the watts add up quickly, the

GC: n CT: Electricity used at any moment is measured in watts. It only makes sense that a 100-watt bulb uses 100 watts of electricity. A desktop computer uses about 65 watts and a central air conditioner uses about 3,500 watts. Since all of the watts add up quickly, the

GC: n CT: Kinetic energy is the energy of motion. An object that has motion – whether it is vertical or horizontal motion – has kinetic energy. There are many forms of kinetic energy – vibrational (the energy due to vibrational motion), rotational (the energy due to rotational motion), and

GC: n CT: Marine current turbines: Pioneering the development of marine kinetic energy converters. This paper gives the rationale and background to an already advanced research and development (R&D) programme aimed at developing technology for the commercial exploitation of kinetic energy from marine currents. This is followed by a brief

GC: n CT: Knowledge engineering is a field within artificial intelligence that develops knowledge-based systems. Such systems are computer programs that contain large amounts of knowledge, rules and reasoning mechanisms to provide solutions to real-world problems. A major form of knowledge-based system is an expert system, one designed to emulate

GC: n CT: ESPRE is a knowledge-based system which aids in the review of requests for platelet transfusions in the hospital blood bank. It is a microcomputer-based decision support system written in LISP and utilizes a hybrid frame and rule architecture. By automatically obtaining most of the required patient data

GC: n CT: After two and a half years of intensive negotiations, a substantial extension to the Convention was adopted in Kyoto, Japan in December 1997. This Kyoto Protocol established legally binding emissions targets for industrialized countries, and created innovative mechanisms to assist these countries in meeting these targets. The

GC: n CT: Though the extreme rates of land clearing that placed Australia in the top 10 land clearing nations in the world have reduced over the past 5 years, we are still clearing much more native vegetation than is being replanted or that is regenerating naturally. This ongoing net