of resistance. In the second experiment, change the waveform, frequency, peak to peak amplitude, DC Offset, Voltage, and Timebase values using a function generator and oscilloscope, and compare how each parameter affects the shape of the wave. It was analyzed by dividing it into 5 cases. In the third experiment, the resonance frequency and damping ratioof the RLC circuit were calculated us
of a particular crystallographic direction. Among the shapes whi- ch can be obtained, rod-like gold nanostructures have been observer or synthesized using various chemical approaches. In this paper, we report the successful aspect ratio control of gold nanorods by the seed-mediated method, along with an improvement in the yield. Two major parameters were controlled to optimize the growth properti
ratio, : clearance volume, : displacement volume)
압축비는 내연기관의 열효율을 결정하는 중요한 parameter이다. 이상적인 Otto cycle의 열효율의 식은 다음과 같이 표현된다.
( : thermal efficiency, : compression ratio, : specific heat ratio)
이때 비열비 는 공기에 대해 1.4 정도로 일정하다.
of system)
(+) Chronic cough with sputum production
(+) Exercise intolerance
PFT
Prebronchodilator FEV1= 2.98 L
(predicted is 4.02 L)
Postbronchodilator FEV1 = 2.75 L
FVC= 4.5 L
1) FEV1/FVC ratio
FEV1/FVC=2.98/4.5=~0.66 로 약 66%
>> 이 값이 75%이하이므로 Obstruction
2) FEV1%
(post-bronchodilator FEV1기준)
FEV1 %계산시 2.75/4.02=0.
of a
study will depend on how the population
is defined.
Sampling frame
a specific set of units from which the sample is actually drawn.
The telephone directory listing of individual, a company’s internal data
-base listing its employ-
ees or customers, univ
ersity registration lists.
Parameter
A characteristic of the population
Unit or set of units con