static method' that is the way to measure the deformation strain that are corresponded to applied force using the strain gage. In other way, 'kinetic method' can measure the Young's modulus using 'sonic resonance test' and 'pulse echo overlap.' In sonic resonance test, sonic wave or impulse are applied to the specimen for finding the resonance frequency of the sample. In other words, pulse echo
◎ UML(Unified Modeling Language)의 정의
▸ 객체지향 분석과 설계를 위한 modeling Language. 이는 Booch, Rumbaugh(OMT), Jacobson등의 객체지향 방법론에 관한 석학들이 내어놓은 방법론의 통합으로 이러한 방법론의 명맥을 잇는다고 볼 수 있다. 또한 객체 기술에 관한 국제 표준화 기구인 OMG(Object Management Group)에서
Time flies like an arrow; fruit flies like a banana. Oettinger (1966)
컴퓨터가 자연적인 언어(natural language)를 처리하도록 하는 데에 있어서의 어려움에 대한 초기의 연구에서, Anthony Oettinger는 우리가 예상되는 구조(expected structure)에 기반하여 어떻게 문장을 번역하는지, 그리고 우리가 번역하며 오류를 범했을 때,
The seven factors determining the barriers to entry
Supply-side economies of scale
Demand-side benefits of scale
Customer switching costs
Capital requirements
Incumbency advantages independent of size
Unequal access to distribution channels
Restrictive government policy
The intensity of rivalry is greatest if:
Competitor are numerous or are roughly equal in size and power
Industry g
2. Important Characteristics of TiO2
(1) Photocatalystic Character
- If the light energy is irrigated at TiO2, the catalyst which absorbed the light energy will activate so it oxidize and restore aspirates.
(2) Characteristic of Ultra-hydrophile
- Ultra-hydrophile is the status that befit with the surface of the material such as glass.
For many of Materials, if we drop water, it ma