Fingerprint recognition

The analysis of fingerprints for matching purposes generally requires the comparison of several features of the print pattern. These include patterns, which are aggregate characteristics of ridges, and minutia points, which are unique features found within the patterns. It is also necessary to know the structure and properties of human skin in order to successfully employ some of the imaging technologies.

Patterns

The three basic patterns of fingerprint ridges are the arch, loop, and whorl:

• arch: The ridges enter from one side of the finger, rise in the center forming an arc, and then exit the other side of the finger.
• loop: The ridges enter from one side of a finger, form a curve, and then exit on that same side.
• whorl: Ridges form circularly around a central point on the finger.

Scientists have found that family members often share the same general fingerprint patterns, leading to the belief that these patterns are inherited.  

The arch pattern.

The loop pattern. The whorl pattern

Kolam/Rangoli

Low Back Pain Symptoms

Pain in the lumbosacral area (lower part of the back) is the primary symptom of low back pain.

• The pain may radiate down the front, side, or back of your leg, or it may be confined to the low back.



• The pain may become worse with activity.



• Occasionally, the pain may be worse at night or with prolonged sitting such as on a long car trip.



• You may have numbness or weakness in the part of the leg that receives its nerve supply from a compressed nerve.



• This can cause an inability to plantar flex the foot. This means you would be unable to stand on your toes or bring your foot downward. This occurs when the first sacral nerve is compressed or injured.



• Another example would be the inability to raise your big toe upward. This results when the fifth lumbar nerve is compromised.

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