Gastrospasm 위경련
상복부에 급격히 발생하는 격렬한 통증으로 담석증이나 급성 췌장염, 급성 위염, 요로결석증, 장폐색, 소화성 궤양 및 천공 등이 원인이 된다.
Gastric ulcer 위궤양
소화성 궤양과 동의어로 쓰이기도 한다. 주된 원인은 헬리코박터 파이로리(Helicobacter pylori, 이하 H. pylori)라는 세균과
Ⅰ. 퇴적과 퇴적구조
1. 위치에 따라
1) 층 상부의 퇴적 구조
유속이 낮을 때 생긴 작은 연흔 구조(small ripple mark), 조용한 환경에서 퇴적물이 수직적으로 가라앉을 때 생성되는 엽층리(laminated bedding), 퇴적물이 대기에 노출되어 수분이 증발될 때 형성되는 건열(mud crack) 등이 나타난다.
2) 층의 단
1. Executive summary
While the demand for low-cost air transportation is potentially huge in Asia, development of low-cost carriers (LCCs) lags behind the region's overall aviation development, and certainly lags behind the LCC development in North America and Europe. It has been noted that market conditions and the regulatory environment of Asia are different from those of North America and Eu
Citibank’s marketing channels are consisted of Direct mail,
Take ones, Direct sales, and Bind-ins
There are 27,200 customer who acquired by below channels. 3200(1.1%) customers from Direct mail, 8000(0.4%) from Take ones, 8000(26.7%) from Direct sales and 8000(0.3%) from Bind-ins
Direct mail’s cost per converted customers is $140.63, take ones’ is $62.5, direct sales’ is $28.13,
4. Equipment
4.1 RCA cleaning
RCA cleaning is a series of rinsing procedure prior to experiment with Si wafer. The purpose of the RCA clean is to remove organic contaminants (such as dust particles, grease or silica gel) from the wafer surface. There are three steps to be performed. The first step is to remove organic contaminant from surface of wafer. Second step is to remove any oxide layer