20140903

1. 영어 기사 읽기
1) Time Travel Simulation Resolves “Grandfather Paradox”, Scientific American
– Hawking and many other physicists find CTCs abhorrent, because any macroscopic object traveling through one would inevitably create paradoxes where cause and effect break down. (abhorrent – 혐오스러운)

2) Ebola Now Poses a Threat to National Security in West Africa, Scientific American
– The Ebola virus outbreak entrenched in west Africa has become a real risk to the stability and security of society in the region, the top U.S. Centers for Disease Control and Prevention official said today after returning yesterday from a visit there (entretched – 참호로 둘러싸인, 견고한, 확립된)
– Failure to tamp down Ebola’s spread is stressing the infrastructure of countries stricken with the disease that must still continue to provide basic health and security services and promote routine commercial activity. (tamp – 다져 넣다)
– This physician was not treating Ebola patients but instead was treating obstetrics patients at a facility in Monrovia, Liberia. (physician – 내과 의사, obstetrics – 산과, 분만실)
– But in the interim, every day the disease goes unchecked may make it harder to stop it as the outbreak’s scale grows, Frieden said. (in the interim – 그 사이에)

3) ISIS video shows beheading of American journalist Steven Sotloff, CNN


2. 데이터 마이닝 퀴즈 준비

011114_0014_vimfcommand1.png

첫 주부터 퀴즈라니!
Prerequisites에 대한 퀴즈를 본다고 함.

정렬 관련 내용을 찾아보았는데, 플래시를 사용해 잘 설명되어 있는 곳이 있었다.
(정렬이란?, http://proneer.tistory.com/entry/Sort-%EC%A0%95%EB%A0%ACSort%EC%9D%B4%EB%9E%80 )


3. SIGFPGA
AXI protocol에 대해 학습. 정보가 저장되지 않고, 현재 흘러다니는 정보만 볼 수 있는 특성을 갖는 interconnection과 그리고 이를 해결하기 위한 프로토콜이 흥미로웠다. 다음 주 중으로 프로젝트가 나올 것이라고 함. (2014/09/12 SIGFPGA 프로젝트 시작)


4. 데이터 마이닝 수업에서.
인덱싱에 해시 테이블을 사용하면, range search 성능이 떨어진다.

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