In describing the answer to the question below, try to share your opinions on the basis of evidences such as articles and books. Also provide information of the evidence (author, title, journal name, etc.).
1. Explain what happens in terms of mechanical/chemical properties when making products using metal-based 3D additive manufacturing technology. (10 points)mechanical properties
전통적
mechanical property is great & resistance from heat is great
Disadvantage: power density is small
Economical characteristic
Do not use expansive catalyst
Do not need reforming
Do not need electrolyte supplement
Price is cheaper than others
Technical characteristic
simple process caused by various fuels
(Natural gas/coal gas)
Do not need reforming
mechanism determining price before shipment.
Cabbage price in Korea shows huge variation due to these characteristics every year. Prices of cabbage has collapsed just after a year experienced price soaring. Due to this phenomenon, many cabbage farms have suffered and consumers are also in trouble. Because cabbage is one of the most important foods in Korea, the huge variation of the price is b
“Characteristics”
1)Limited Private Property
-State-owned enterprises
2)Non-Price Mechanism
-Distribution system
3)Planning by Government
-Command system
“The reasons of
Chinese economic reform”
Distortion in Industrial structure and inefficiency
Failure of “The Great Leap Forward” (58~60)
Failure of “The Great Proletarian Cultural Revolution” (66
facebook in foodservice Industry
Facebook is a social utility that connects people with friends and others who work , study and live around them
Social network web site that
used in the largest number of people
2012, Facebook's subscribers was been exceeded billion
Na/NaxC6
New anode material made of carbons, (NaxC6). There is the average voltage on the low potential plateau ( higher on the Na cells than the Li cells ).
NaV1−xCrxPO4F
retain more energy
Na2FePO4F
mixture with Li2FePO4F
Cathode electrode Anode electrode Electrolyte Cell volt Energy Density
(Wh/kg)
NiMH
Battery Nickel oxide
(ex. NiO2H) Hydrogen occlusion alloy G
1. 서론
1-1. Valve Characteristic Apparatus란?
밸브가 열리는 시간, 열려 있는 시간, 밸브의 개폐가 중복되는 시간 등을 제어함으로써 기관 작동효율을 향상시키는 기구 및 시스템이다.
구체적인 예를 들면 가변 밸브제어(variable valve control, VVC), 가변 밸브 액츄에이션(Variable Valve Actuation, VVA), 가변 밸브 사건(V
1. Introduction
‘enzyme’이라는 단어를 접했을 때 많은 사람들이 실험실에서 사용하는 것으로만 생각한다. 실제 생활과의 거리가 먼 것이라고 생각하는 경우가 많이 있다. 그러나 우리 삶의 많은 부분에 효소가 들어와 있다고 할 수 있다. 특히나 효소의 사용이 보편화 되고 많은 연구와 개발이 이루어
Development background
2. History of development
1960s
Discovery of colony-stimulating factors (CSF)
1980s
GM-CSF, M-CSF, G-CSF and multi-CSF
The human G-CSF was cloned
Usage for the treatment at first
1990s
first approval of Filgrastim by the US Food and Drug Administration
Launched Lenograstim
2000s
Launched PEG-filgrastim