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In a linear system, "flutter point" is the point at which the structure is undergoing simple harmonic motion—zero net damping—and so any further decrease in net damping will result in a self-oscillation and eventual failure. "Net damping" can be understood as the sum of the structure's natural positive damping and the negative damping of ...
Caterpillars have different types of projections; setae (hairs), spines, warts, tubercles, and horns. The hairs come in an assortment of colours and may be long or short; single, in clusters, or in tufts; thinner at the point or clubbed at the end. A spine may either be a chalaza (having a single point) or a scolus (having multiple points). The ...
The pterostigma, a heavier section of the wing than nearby sections, assists in gliding. Without the pterostigmata, self-exciting vibrations known as flutter would set in on the wing above a certain critical speed, making gliding impossible. Tests show that with the pterostigmata, the critical gliding speed is increased 10–25% on one species ...
The navel is the centre of the circle in this drawing of the Vitruvian Man by Leonardo da Vinci.. The umbilicus is used to visually separate the abdomen into quadrants. [2] ...
Superficial anatomy of female and male human body Surface projections of the major organs of the trunk, using the vertebral column and rib cage as main reference points of superficial anatomy Surface anatomy , or superficial anatomy, is the study of anatomical landmarks that can be identified readily from the contours or other reference points ...
In the anatomy of some taxa, such as many Cicadomorpha, the front of the head is fairly clearly distinguished and tends to be broad and sub-vertical; that median area commonly is taken to be the frons. [9] The clypeus is a sclerite between the face and labrum, which is dorsally separated from the frons by the frontoclypeal suture in primitive ...
[65] [66] Anatomy advanced further with the invention of the microscope and the study of the cellular structure of tissues and organs. [67] Modern anatomy uses techniques such as magnetic resonance imaging , computed tomography , fluoroscopy and ultrasound imaging to study the body in unprecedented detail.
The word derives from the Greek word υποχόνδριο ("hypochondrio"). This Greek word means literally "below the cartilage" which refers to the costal cartilages.In other words, the word refers to the area of the ventral trunk that is located below the costal cartilages. [4]