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In fluid dynamics, angle of attack (AOA, α, or ) is the angle between a reference line on a body (often the chord line of an airfoil) and the vector representing the relative motion between the body and the fluid through which it is moving. [1] Angle of attack is the angle between the body's reference line and the oncoming flow.
When the angle of attack on an aerofoil is measured relative to the zero-lift axis it is true to say the lift coefficient is zero when the angle of attack is zero. [1] For this reason, on a cambered aerofoil the zero-lift line is better than the chord line when describing the angle of attack. [2]
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In coordination chemistry, the ligand cone angle (θ) is a measure of the steric bulk of a ligand in a transition metal coordination complex. It is defined as the solid angle formed with the metal at the vertex of a cone and the outermost edge of the van der Waals spheres of the ligand atoms at the perimeter of the base of the cone.
The natural bite angle (β n) of diphosphines, obtained using molecular mechanics calculations, is defined as the preferred chelation angle determined only by ligand backbone and not by metal valence angles (Figure 3). [1] Figure 3. Bite angle of a diphosphine ligand bound to rhodium.
In computer networking, a mangled or invalid packet is a packet — especially IP packet — that either lacks order or self-coherence, or contains code aimed to confuse or disrupt computers, firewalls, routers, or any service present on the network. Their usage is associated with a type of network attack called a denial-of-service (DoS
[1] [2] [3] While the development of more sophisticated sequences of attack has helped threat actors develop better strategies and evade detection as compared to the past, similar to planning a heist, cyber defenders have also learned to use lateral movement against attackers in that they use it to detect their location and respond more ...
The adversary can then set up a rogue DHCP server so that clients receive incorrect network settings and as a result transmit data to an attacker's machine. [8] One method for mitigating this type of attack is to use the IP source guard feature available on many Ethernet switches. The IP guard initially blocks all traffic except DHCP packets.