crack


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crack

(krăk),
1. A fissure.
2.

crack

(krak) an incomplete split, break, or fissure.

crack

Etymology: ME, craken
a street drug made by chemically converting cocaine hydrochloride to a form that can be smoked. Smoking crack is a faster, more direct way of getting cocaine molecules into the brain. Because larger amounts of the drug reach the brain more quickly, the effects are more intense than when cocaine, in the white-powder form, is injected, ingested, or inhaled. Also called crack cocaine, freebase.

crack

Substance abuse A 'free-base' form of cocaine which, when smoked in a pipe, produce a brief, very intense 'high'. See Bingeing, Cocaine, Crack 'smile. ', Free base cocaine.

crack

(krak)
1. A fissure.

crack

A highly purified form of COCAINE which produces an intense reaction of rapid onset. Crack is inherently more dangerous than less concentrated forms and deaths have resulted from its use.

crack

(krak)
A fissure.

crack

a discontinuity in a hard, brittle surface such as horn, hoof.

toe crack

Patient discussion about crack

Q. what causes the sound of cracking noises in the head all the time it was said i had acute sinusitis but honestly i think it is more . I don't know why i have cracking noises in my head . I am very concerned about this also my neck is always stiff feeling and aching all the time. . My eyes are very tired and i see blue spots and they hurt behind the eye very badly . I have headaches very often

A. wow...that really sounds serious...i have chronic sinusitis and i can tell you i had horrible headaches but nothing like you describe now. i would strongly consider going to a hospital and checking it out...
tell us what was the result!

Q. anyone knows how to stop hard skin on the feet from becoming cracked??? during summer my feet got lots of hard skin and in the heel area the skin actually got cracked kinda deep. it hurts now and the cracks are starting to get infected I guess... do u guys know how to solve this?? I know there are some creams for that but I thought maybe now it's too late for that and I need something stronger?

A. There are good creams for moisterizing the skin of your feet on a daily basis, however now that you feel they might be infected you should see a dermatologist for some better treatment.

Q. Im only 17 I have horrble lower back pains. Im constitly rubbing,stretching, or cracking my back. the pain is either a throbbing pain or an ache or sting.I feel it worse when I put my chest out my shoulders back. my back feels like its out of place.

A. Lower back pain is so very common... I have had it for years, and just recently what I found to be very helpful is walking. Even a 30-45 minute walk and then some streching is good. I have hardly had any pain since I started exercising and it feels really good. Swimming is also known to help.

More discussions about crack
References in periodicals archive ?
Utilization of cracks to fabricate anodic aluminum oxide nanoporous tubular and rectangular membrane" Journal of Vacuum Science and Technology B, Nanotechnology and Microelectronics: Materials, Processing, Measurement, and Phenomena, 29: D1071-D1077 (2011)
For this work, using the analytical procedure, the crack growth are obtained and estimated no of cycle.
The experimental testing specimen of an under-reinforced beam (B1) was used as a validation tool (Figure 6) and to visually observe the crack initiation and propagation under an increasing load.
Moreover, the thermal stress would turn into compressive stress with the depth increasing, which would also inhibit the crack propagation along the depth direction.
The simply supported rectangular plate with an all-over breathing crack can be illustrated by Figure 1.
These are usually stepped diagonal cracks and are caused by settlement of the external leaf which is not properly supported before the replacement windows and doors are installed.
2] are shear modulus for materials 1 and 2; c is the distance from the middle of the crack at the interface plane; r, [theta] are polar coordinates, k = 3-4v for the plane strain case and k = (3--v)/(1+v) for the plane stress case, v is Poisson coefficient, and g is the parameter that expresses the magnitude of the applied load.
Both long and short crack models gave a reasonable lower bound fatigue life prediction when the upper bound EVS estimate of the maximum pore size was used as the starting flaw size.
These directions agree with the measured directions of main crack systems (Fig.
However, the appearance and location of the latest set of cracks were different.
STRUCTURAL CRACKS These occure particularly in support beams, columns and load-bearing areas and affect the integrity of the building.
J-integral, a fracture mechanics parameter, was introduced as a path-independent integral which can be drawn around the tip of a crack and viewed both as an energy release rate parameter and a stress intensity parameter.