fracture) - 골다공증, 종양, 감염 등으로 뼈가 약해져 정상인 뼈에서는
골절이 일어날 수 없는 약한 힘에 의해서도 일어난 골절
불충분 골절(insufficiency fracture)- 이외의 병변 부위에 일어난 병적 골절
피로골절(fatigue fracture, stress fracture)- 뼈의 일정한 부위에 반복되는 스트레스가
가해질 때 점차적으로
Ⅰ. INTRODUCTION
In fourth semester most of our department students attend the subject of mechanical manufacturing practice and we have made a bolt by ourselves. But the process was not a soft job. A bolt and nut is used diversely but it seemed that we don't know much about a importance and manufacture of bolts.
A bolt is a threaded fastener used in industry to make two or more mechanical
insufficient
Cause of Indonesian financial Crisis!
Problems of Indonesia Economy
August 14, 1997
the managed floating exchange regime free-floating system Rupiah drop even more
IMF몶s rescue package of $23 Billion No help
September 1997
Moody몶s rated Indonesia몶s long-term debt
to 몷junk bond몸 status
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Rupiah was 200 to 1 USD, afterw
취약, 질내 궤양 발생↑
질건조증 -> 요실금등을 유발
Atherosclerosis
estrogen ↓ -> HDL ↓, LDL ↑ -> 동맥경화 위험 ↑
정의 : a skeletal disorder characterized by compromised bone strength predisposing a person to an increased risk of fracture.
osteoporosis 가 올 때는 bone 의 vertical 구조보다는 horizontal 구조가 먼저 끊어지게 된다.