(1973) 4 Stages of Second Language Development
1. Random Error(Presystematic): Vaguely aware that there is systematic order. Stage of experimentation and inaccurate guessing
2. Emergent: In consistency in linguistic production. Begin to internalize certain rules. ‘U-shaped learning’. Unable to correct errors when they are pointed out. Avoidance of structures and topics.
1. Introduction*
Do the very presence of categories affect shopper’s satisfaction?
“mere categorization effect”:
is driven by a greater number of categories signaling greater variety
among the available options, which allows for a sense of self-determination
from choosing.
This effect, however, is attenuated for choosers who are familiar with
the choi
Background of Experiment
□ Al-Si Alloy
AI + Si = Al-Si Alloy
1. Low melting point
2. light
3. Large heat capacity
4. Insoluble to each other
.
.
.
Result and Analysis - EDS
□ Composition Analysis
Al, Si is almost insoluble to each other at rsoom temperature.
All solid phase will have either 100% Al phase or 100% Si phase.
experience through the many wonderful accommodations. Walkerhill has the finest casino in all of Seoul. In 2000 the Duty-free store opened with top name brands. on March 2001, they opened transit hotel named Air Garden Hotel (Room size 90 rooms) in Incheon international airport to diversify the business and the surrounding area including Walkerhill Casino shows and differentiated business based o
Summary of Proposal
reason of select and expected value of strategies
As fast food chains which provide quick meals to people has played an important role in today's busy society, the way of producing clothes has also become faster. Clothing industry is hard to keep in control because of fast changing needs of customers. However, Zara the clothing brand of Spain has maintained at the wor
The Concept of Ubiquitous Computing
The Internet is Simultaneous, Existing Everywhere and Omnipresent: Implement networking and computing functions to everywhere in order to conduct infra.
Beyond Time and Space Limitations: it enables people access to the information network and utilize various information communication service.
Integration: Integrate things, computers, or devices with
1. Path for lines of magnetic force
2. Improve the stability of magnet
3. Prevent the magnetic field bending
4. Reinforce the magnetic field
“How can we make
magnetic field about 1~5 kOe
using permanent magnet?”
“Let’s solve some Calculation”
YokeDesign
“York design method”
V_m(1-e^(-1))=V_m×0.63 Rising time of a first-order filter
V_m(1-e^(-2))=V_m×0.63+(0.37V_m×0.63)
B. frequency response of first-order filters
Frequency Response of a RC Circuit
1) Find the following transfer functions
Transfer function(전달함수, G): 제어이론에서 전달함수는 모든 초기조건이 0이라는 가정하에서, 출력함수의 Laplace변환
-Time response of RC circuit
V_i (t)=R ×I(t)+ V_c (t) 라는 R,C 회로방정식에서
C× (dV_c (t))/dt =I(t) 인 Capacitor 의 전류,전압 관계식이 적용되면
V_i (t)=R ×C ×(dV_c (t))/dt+ V_c (t) 를 얻을 수 있다.
여기에서 V_c (t) 에 관한 1차 미분방정식을 풀면,
V_c (t)=(1-〖e 〗^(-t/τ) )× V_i (t) 가 된다.
τ(시정수)