N개(個) 입자(粒子)의 계(系)와 n 개(個)의 세포(細胞)를 가진 위상공간(位相空間)에서의 내부(內部)에너지와 Entropy 에 관한 고찰

김수선 ( Soo Sun Kim ) 건국대학교 기초과학연구소 1979 理學論集 Vol.5 No.-

1. The temperature is raised from a value where T≪θ, the numbers of particles in the cells of higher energy increase, but even at very high temperatures, where T≫θ, one-third of the particles remain in stale of zero energy. And at very law temperatures both U and S approach zero. At very high temperatures U approaches Nw and S approaches Nκ In 3. 2. Hence at T=O° K, No=N and N1=N2····O, That is, all of the molecules are in the lowest vibrational energy state at O° K, at very low temperatures where T≪θvib the total energy is given by Uvib=1/2 Nκ θvib and the total energy of a rotating molecule Urot is given by 3/4 Nκ θrot, but entropy Svib can be approximated by zero. 3. At very high temperatures where T≫θvib and T≫Orot, the total energy Uvib of all oscillator is then 1/2 NκT, the total energy Urot can be approximated by 2Nκ(T/θ)2, but the entropy of the vibrational and rotating molecule are Svib=Nκ In T/θvib, Srot=Nκ(In(T2/θ2rot)+2).

비압축성(非壓縮性) 점성류체(粘性流體)의 압력강하식(壓力降下式)

김수선 ( Soo Sun Kim ) 건국대학교 기초과학연구소 1982 理學論集 Vol.7 No.-

Independent dimensionless parameters produced by all physical quantities (length, time, mass, force, velocity, acceleration, area, discharge, pressure, gravity, density, specific weight, dynamic viscosity, kinematic viscosity, surface tension, bulkmodulus of elasticity etc). Its parameters is given by dimensional analysis and Buckingham`s t theorem.

CdS-TiO2 복합 광촉매계에 의한 수소제조

김수선(Soo Sun Kim),장점석(Jum Suk Jang),소원욱(Won Wook So),김광제(Kwang Je Kim),문상진(Sang Jin Moon) 한국수소및신에너지학회 2000 한국수소 및 신에너지학회논문집 Vol.11 No.4

In the case of photocatalytic hydrogen production from water, the performance-property relationships of CdS-TiO₂ film type composite catalysts were investigated. To control the physical properties of the primary particles, the mixture of CdS and TiO₂ nano-sols prepared by the sol-gel method at room temperature was hydrothermally treated at 240oC for 12hr. The film electrodes were prepared by the casting method. The photocurrents measured by a photoelectrochemical method and the hydrogen production rates measured by a photochemical method were closely dependent on the physical properties such as crystalline form, primary particle size and CdS/TiO2 mole ratio, and these varied in the range of 1.2~2.6 mA/cm2 and 1.0~1.6x10-3mol/hr, respectively.

여가속도(餘加速度)에서 본 전자충돌(電子衝突)에 관(關)하여

김수선 ( Soo Sun Kim ) 건국대학교 기초과학연구소 1978 理學論集 Vol.4 No.-

The total number of an electron that collide with to the surface of rigid bodies per unit area to the direction of complementary acceleration a(c) between ac and a(c)+da(c) is described. It is known that the number of electron per unit Area to the complementary acceleration is form of (4/1)N:V-G(N/C)-wheares only one term form (4/1)N:V which analised by Maxwell`s statistical method.

액체구조(液體構造)에 관한 통계열력학적(統計熱力學的) 연구(硏究)

김수선 ( Soo Sun Kim ) 건국대학교 기초과학연구소 1975 理學論集 Vol.1 No.-

자체 조절이 있는 임계적 셀 자동자의 모형

김수선 ( Soo Sun Kim ),강병남 ( Byung Nam Kahng ) 건국대학교 기초과학연구소 1993 理學論集 Vol.18 No.-

본 논문에서는 3차원의 체심업방격자에서의 툼 모델을 소개하였으며 이의 물리적 현상을 살펴보았다. 잡음이 척은 극한에서는 이 모델은 물체-상-물체 모델로 사상되며 이것은 표면에서의 사태를 동반한 입자들의 축척과 증발의 문제로 환원이 된다. 이 모델에서 표면의 동역학적 성질은 바이어스가 없을 때는 에드워드-윌킨슨 방정식으로 기술되며 바이어스가 있을 때는 비등방적 카다르-파리지-챙 방정식으로 기술된다는 것을 밝혔다. 따라서 바이어스가 있을 때나 없을 때나 모두 표면의 요동 간격의 제곱은 시간과 거리에 대하여 로그적으로 발산한다. We introduce a novel three dimensional Toom model on bee lattice, and study its physical properties. In low-noise limit, the model leads to an effective solid-on-solid-type model, which exhibits a stationary interface via depositions and evaporations with avalanche process. We find that the model is described by the Edwards-Wilkinson equation for unbiased case and the anisotropic-Kardar-Parisi-Zhang equation in the weak-coupling limit for biased case. Thus the square of the surface width diverges 10garithmicalIy with space and time for both unbiased and biased cases.

고체(固體)에 있어서 Entropy의 통계열력학적(統計熱力學的) 양(量)에 관하여

김수선 ( Soo Sun Kim ) 건국대학교 기초과학연구소 1976 理學論集 Vol.2 No.-

[1]Average H of Hamiltonian function is the same thermodynamics internal energy E by the system. Namely, that is H=E, ψ=F, θ=κT and -lnp=s/κ And thermaldynamics quantities has made connected with statistical mechanics quantities. The quantitative relation is expressed as follow table. [2] S=2κ∫(-H/θ)dα=2κ(-ψ/θ)=2(-ψ/T) are shown as Hamiltonian function H and Helmholtz free energy ψ which were obtained in statistical mechanics quantities. And this formula will be used widely for diffusion in solids in the future.

과목변경수학교사의 신념에 따른 교수 실제에 관한 연구

김수선 ( Soo Sun Kim ),고상숙 ( Sang Sook Koh ) 한국수학교육학회 2015 수학교육논문집 Vol.29 No.3

본 연구는 2009개정교육과정의 현장적용에서 교사수급 조절로 인해 원래 수학이 아닌 다른 과목을 가르치던 교사가 과목을 변경하여 수학을 가르치게 된, 과목변경수학교사의 교수 실제를 조사하였다. 과목변경수학교사 중 설문지를 통하여 전통적인 신념과 비전통적인 신념이 강하게 나타난 두 명의 교사를 대상으로 수업 관찰 및 면담을 통하여 다음과 같은 결과를 얻었다. 첫째, 수업실제에서 전통적인 신념을 가진 교사 A는 교사 위주의 설명식 수업이, 비전통적인 신념이 강한 교사 B는 약간의 시도는 있었으나 비전통적인 수업을 했다고 보기는 어려웠다. 둘째, 과목변경수학교사가 겪는 어려움에 대해 교사 A는 수학교수 자체보다는 학생부장으로서 겪는 업무의 어려움과 지나치게 많은 수업시수에 대한 고충을 토로했으며 비전통적인 신념을 지닌 교사 B는 학습자중심의 활동 수업을 하고 싶으나 방법을 알지 못하여 자신의 신념이 반영된 수업을 제대로 하지 못하는 현실이 힘들다고 하였다. 그리고 두 교사가 공통적으로 수업의 전문성을 더욱 신장할 수 있는 기회를 많이 주어야 한다는 것을 거듭 강조하였다. 외부지원으로는 지속적인 연수 및 선배 교사와의 멘토링, 그리고 수업 연구에만 전념할 수 있는 시간 확보 등을 언급하였다. This study was to investigate the practice of the teachers who changed their teaching subject to Mathematics from other subjects. Teacher, A who had traditional belief and Teacher, B, non-traditional belief were chosen for the study through the questionnaire in Sep. 2014. The result indicated that Teacher, A in traditional belief showed teacher-centered teaching but Teacher, B in nontraditional belief showed inconsistent way of teaching in comparison to the original perspective. The later said she could not teach students as she wanted to teach because of the lack of knowledge of teaching as a math teacher. The difficulties Teacher, A encountered were: to handle too many works beyond teaching and to teach too many contents to cover without having enough time to prepare. Teacher, B didn’t know how to teach students math in a constructivism way. They asked to offer them more in-service training program to develop their expertise for teaching mathematics.

벡터 미분 연산자

김수선 ( Soo Sun Kim ) 건국대학교 기초과학연구소 1995 理學論集 Vol.20 No.-

벡터 미분 연산자들을 좌표계의 비의존성의 관점에서 살펴보고 그로부터 좌표계에 의존하는 표현들을 유도하였다. 먼저 독립된 벡터 미분 연산자가 grad f, div f→, curl f→ 의 오직 3가지뿐임을 보였으며 이외의 다른 미분 연산자를 정의할 필요성이 없음을 밝혔다. 그리고 다음은 연산자들을 좌표계에 의존하지 않는 방식으로 정의해서 그 정의로부터 다양한 좌표계에서 변화하는 표현들을 유도하였다. In physics and mathematics, there is much confusion of a definition and its representations. Definitions are the starting point of all sciences and mathematics. The most important characteristic of a definition is the independence of coordinate-systems. But the representations of it are dependent on coordinates. So I want to review several vector differential operators from the standpoint of coordinate-independence. And then I`ll deducd coordinate-dependent representations of them. At first, I`ll investigate that there are only 3 possible independent vector differential operators; grad f, div f→, curl f→. There is no necessity of defining other independent vector differential operators except them. Next I`ll define such operators in a coordinate-free style. At last I`ll make the representations of them in various coordinate-systems.

복막 투석 환자에서 복막염의 원인균 동정에 이용되는 두 가지 배양방법의 비교

안성민 ( Sung Min Ahn ),정민영 ( Min Young Jung ),최혁수 ( Hyeok Soo Choi ),최보윤 ( Bo Youn Choi ),김수선 ( Su Sun Kim ),서승인 ( Seung In Seo ),김민강 ( Min Gang Kim ),김수진 ( Soo Jin Kim ),오지은 ( Ji Eun Oh ) 대한내과학회 2011 대한내과학회지 Vol.81 No.4

Background/Aims: Peritonitis is the most frequent complication of continuous ambulatory peritoneal dialysis (CAPD). Prompt recognition and treatment of peritonitis is important. The purpose of this study was to compare the effectiveness of isolation of the microorganisms causing CAPD peritonitis by the BACTEC blood culture and conventional methods. Methods: We retrospectively reviewed 38 episodes of peritonitis in 34 CAPD patients between September 2007 and February 2010. Two methods of processing dialysate from patients on CAPD were used. Blood culture was performed using two 10-mL effluents, which were inoculated into a pair of BACTEC culture bottles. The conventional method was performed using 50 mL of centrifuged dialysate. The sedimented dialysate was inoculated onto blood agar and MacConkey agar plates or into thioglycollate broth. To evaluate effectiveness, we compared the rate of positive culture results and the time to identify the causative organism of the two culture methods. Results: Use of the BACTEC bottle method resulted in more positive culture results than did conventional culture (86.8 vs. 57.9% p=0.003). The time taken to identify the causative organism from culture-positive peritonitis was more rapid using the blood culture compared with the conventional culture method (90 vs. 109 hr, p=0.03). Conclusions: Blood culture using the BACTEC bottle is more effective than the conventional culture technique for detection of causative microorganisms in CAPD peritonitis. (Korean J Med 2011;81:470-477)