About half a head-length above the upside-down triangle, draw a very small circle; this is the belly button.
To determine if a given piece of fabric is the right size for use as a poncho, drape the blanket or fabric over your head - it will hang about a head-length above where it will as a finished poncho.
For each specimen we measured snout−vent length (SVL) to the nearest 1 mm using a string and metric rule and obtained a separate head length measurement to the nearest 0.1 mm using a digital caliper.
The final suggested dimensions consist of a cylindrically shaped crystal with a diameter of 5 mm, a total length of 5 mm and a tapered head length of 1 mm.
None of these were significant, however, there is a trend between head length → fitness (β = -0.16; P = 0.06).
To stain motor neurons innervating mandible closer muscles equally, the right hemisphere of the head capsule was cut transversely at half of head length with a sharp scalpel, and a small crystal of a fluorescent dextran (Fluororuby; Molecular Probes, Carlsbad, USA) was placed onto the surgically treated region.
Pitcher et al [ 10] reported a positive relationship between head length and speed in the guppy, Poecilia reticulata, but not between other length measures.
Riek and Geiser (2012) induced a larger size (both head length and body length) in fat-tailed dunnarts (Sminthopsis crassicaudata) reared in a cold environment (16°C) compared to individuals reared in a warm environment (22°C).
Besides the conventional approach based on the three-layer resist structure a new one based on the poly Si/polyimide bilayer is demonstrated using which a ratio of the gate head length to the gate foot length larger than 10 is achieved.
We used the ratio between flagellum and head length as a possible predictor of sperm swimming speed [ 26].
Brachycephalization is thought to be due to relative higher increase in the head breadth in comparison with the head length as a result of improvement in nutrition [ 4].
