國內 自動車 製造企業의 人事考課制度에 관한 硏究 : K社를 中心으로

최규석 西江大學校 1993 국내석사

2원계 Fe-Cr 및 Fe-Ni합금에서 고속 셀의 형성거동 연구

최규석 창원대학교 대학원 2007 국내석사

During directional solidification of alloys, transitions from a planar to cell to dendrites generally occur as the velocity is increased. The reverse transition from dendrites to cell also occurs when the velocity is increased further. The high velocity transition is generally observed in rapid solidification techniques. In this study, experiments have been carried out in Fe-Cr and Fe-Ni in which the freezing range is very narrow so that the high transition occurs at relatively low velocities, 50~100㎛/sec, by bridgman-type directional solidification. We observed that dendrite formation can be suppressed so that the interface of solid/liquid changes continuously from low velocity to high velocity cell. It was also interesting to find that the cell spacing was continuous with growth velocity from the low and high velocity cells. The interface temperature analysis by using the cellular growth model. Interface temperature increases with velocity for the low velocity cell whereas is decreases with velocity for the high velocity cell.

龍虎의 環抱가 後孫數에 미치는 影響

최규석 嶺南大學校 2011 국내박사

In the Choseon Dynasty period, Feng-shui had immense appeal for the masses but Feng-shui theory is so exhaustively metaphysical that at present has by no means been universally accepted in the academic world. While there appears to be no definitive evidence that Feng-shui is scientific, it is clear that many people have believed in it for a long time. To be sure, there have been scientific studies concerned specially with Feng-shui but the field of the studies is relatively young. The purpose of this paper is to test statistically the hypotheses that the type of the grave site can influence the growth of the male descendants of the grave. The method of the statistical analysis by dint of SPSS programme had been put to use in order for this article to place the effect of the encirclement by blue dragon and white tiger on the number of male descendants at its statistically analytic center. For significance level to be less than 0.05 is adopted as a result of statistical meaning. The 92 graves of the analytic subjects were set up between the 15th and the 19th centuries and scattered in Kyeong-sang, Kyeonggi, and Chungcheong Provinces of South Korea. After they were confirmed on the spot, the three types of the graves of the subject of study were measured with the eye. This thesis made investigation into around 45 clans' 13,000 male descendants of these graves and chose the 60 families of 36 clans which can be used as data among 45 ones, then investigated 92 graves with a focus on 10,574 male descendants. The three types of proper inclination-encirclement, reverse inclination -encirclement, and reverse inclination-nonencirclement are derived by interweaving proper inclination and reverse inclination of the internal base rock in the grave site with encirclement and non-encirclement by blue dragon and white tiger. The mean increase multiples of male descendants in the 4th and 5th generations from the graves of the subject of study each are 2.5 and 2.0 times in the case of proper inclination-encirclement, 1.5 and 1.5 times in the case of reverse inclination-encirclement, and 0.9 and 1.3 times in the case of reverse inclination-nonencirclement. The numbers of mean delivery of male descendants in the 4th and 5th generations from the graves of the subject of study each are 2.8 and 2.4 persons in the case of proper inclination-encirclement, 2.0 and 1.9 persons in the case of reverse inclination-encirclement, and 1.5 and 1.7 persons in the case of reverse inclination-nonencirclement. The mean sonless rates of male descendants in the 3th and 4th generations from the graves of the subject of study each are 11.3% and 14.1% in the case of proper inclination-encirclement, 24.7% and 20.0% in the case of reverse inclination-encirclement, and 38.5% and 21.7% in the case of reverse inclination-nonencirclement. The conclusions which can be drawn from this study are these : (1) Whether the grave is surrounded by blue dragon and white tiger or not and the condition of inclination of internal base rock in the grave site influence the increase in the number of male descendants in the 4th and 5th generations. (2) The increase in the number of male descendants is influenced much more by the inclination form of the internal base rock in the grave site influence than by that of the encirclement by blue dragon and white tiger. (3) The rate of an increase in male posterity of the grave of proper inclination-encirclement is higher than that of an increase in male posterity of the grave of reverse inclination-encirclement and the difference of the rate of an increase in male descendants between these graves appears in the male ones in the 4th and 5th generations. (4) The rate of an increase in male posterity of the grave of reverse inclination-encirclement is higher than that of an increase in male posterity of the grave of reverse inclination-nonencirclement and the difference of the rate of an increase in male descendants between these graves appears only in the male ones in the 4th generation. (5) The difference of the rate of increase in the number of male descendants results from that of the number of delivery and the sonless ratio.

대학생의 조직몰입과 조직시민행동이 만족 및 구전에 미치는 영향

최규석 영남대학교 대학원 2011 국내석사

지식사회를 선도할 대학은 그 역할이 아주 중요하다. 현재 우리나라는 저 출산 이라는 사회적 문제와 대학평가로 인해서 도태되고 있는 대학들은 감축 및 통합이 예고되고 있다. 이러한 이유들로 인해 많은 대학들은 대학의 선전과 학생들에 대한 혜택을 늘리려고 애를 쓰고 있다. 최근 기업에서 고객에 대한 관심이 증가되고 있는 것과 같이 대학에서도 학생을 주목하고 관리해야 한다. 따라서 본 연구에서는 대학에 대한 학생의 조직몰입과 조직시민행동의 관계를 알아보고, 조직시민행동의 수준에 따른 전반적인 만족과 구전과의 관계를 살펴보기로 한다. 본 연구의 목적을 구체적으로 살펴보면 아래와 같다. 첫째, 학생의 대학에 대한 조직몰입이 대학에 대한 조직시민행동에 미치는 영향을 파악한다. 둘째, 학생의 대학에 대한 조직시민행동이 대학에 대한 만족에 미치는 영향을 파악한다. 셋째, 학생의 대학에 대한 조직시민행동이 대학에 대한 구전에 미치는 영향을 파악한다. 본 연구의 대상은 4년제 대학교에 현재 재학 중인 대학생이다. 표본은 경영학 관련 수업을 듣는 학생을 대상으로 실시하였다. 총 309부의 설문지를 배부하였고 이 중 16부의 설문지는 설문에 응답이 빠졌거나, 작성되지 않은 설문지가 있어 이 설문지들은 제외하였다. 이에 따라 최종적으로 설문이 완료된 대학생의 설문지 293부를 분석에 사용되었다. 응답자의 성별은 남자가 57.7%, 여자가 42.3%, 연령은 20~21세가 46.7%, 22세~23세가 40.7%, 그리고 전공은 인문․사회계열이 84%로 가장 많았고 학년은 2학년이 42%, 3학년이 33.4%로 나타났다. 실증분석 결과 정서적 몰입을 지각하는 학생들은 이타성, 예의성, 스포츠맨십, 시민의식에 정(+)의 영향을 주었다. 그리고 스포츠맨십을 지각하는 학생들은 대학에 대해 전반적으로 만족하고 스포츠맨십과 이타성을 지각하는 학생들은 구전의도에 정(+)의 영향을 주었다. 본 연구결과의 이론적 시사점은 다음과 같다. 첫째, 조직몰입의 3가지 차원 중 정서적 몰입이 다른 몰입의 차원보다 조직시민행동에 훨씬 강한 영향을 주었다. 둘째, 스포츠맨십은 대학에 대한 전반적인 만족에 정(+)의 영향을 주었다. 셋째, 이타성과 스포츠맨십은 대학에 대한 구전의도에 정(+)의 영향을 주었다. The university which will lead the knowledge society is playing quite an important role. Currently due to one of social issues, low birth, and evaluation of university, the universities, which are being selective, are predicting reductions and integration. For these reasons, many universities are struggling to increase publicity of themselves and benefits for students. Recently just as the enterprise keeps increasing the interest to the customer, the university should also pays attention the students and manage the students. Thus in this study, organizational commitment of student to the university and organizational citizenship behavior of student to the university are examined, according to the level of organizational citizenship behaviors, the author try to look into the relationship between overall satisfaction and word of mouth. The purpose of this study to examine are as follows. First, to determine the impact of organizational commitment of students to the university to organizational citizenship behavior of students to the university. Second, to determine the impact of organizational behavior of students to the university to satisfaction of students to the university. Third, to determine the impact of organizational behavior of students to the university to word of mouth. The subjects of this study are the students who are currently attending a four-year university. The sample of this study is the students who attend business-related classes. A total of 309 questionnaires were distributed, among them 16 questionnaires were excluded, due to missing responses or having not written questionnaire. Accordingly the final 293 surveys were used for the analysis. Among the respondents, 57.7% of respondents are male , 42.3% of respondents are female , 46.7% of respondents' age are between 20 and 21, 40.7% of respondents' age are between 22 and 23. And according to the major, 84% of respondents are majored in humanities and social studies, 42% of respondents are sophomore, 33.4% of respondents are junior. The analytical results shows that the students who perceive an affective commitment have a positive influence to the altruism, courtesy, sportsmanship, civic virtue. And the students who perceive sportsmanship are satisfactory generally about the university and the students who perceive sportsmanship and altruism have a positive influence to information by word of mouth intention. Theoretical implications of the results of this study are as follows. Firstly, among the 3 kinds of organizational commitment dimensions, affective commitment have a much stronger impact on organizational citizenship behavior than other organizational commitment dimensions. Secondly, the sportsmanship has a positive influence to the overall satisfaction to the university. Thirdly, the altruism and sportsmanship have a positive influence to the intention of word of mouth.

다물체 동역학 해석 기법을 이용한 가스회로차단기의 성능개선에 관한 연구

최규석 부경대학교 2013 국내석사

In this study, the operating performance, spring characteristics, and material properties of a gas-insulated circuit breaker were optimized using multibody dynamics. The circuit breaker consisted of several latches and a cam. The dynamics behavior of the latches was affected by the spring characteristics, as well as by the materials and length of each latch. Our results indicated that the motion of the latches was a key factor in determining the opening time of the circuit breaker. A multibody model for the circuit breaker was developed and verified by comparing simulated results with experimental data. The opening time for the breaker was reduced by 1.7ms in the simulations.

탄소 나노튜브의 합성 및 전계방출 소자 응용 연구

최규석 忠南大學校 大學院 2002 국내박사

Carbon nanotube (CNT) is hollow tube formed by roll-up of graphite sheet(s) into cylinder. It is divided into single-wall carbon nanotube (SWNT) and multi-wall carbon nanotube (MWNT) depending on the number of the graphite sheets forming the tube wall CNT was disclosed for the first time by Iijima in 1991 as MWNT type. The distance between the atomic graphitic sheets of the wall in MWNT is ∼0.34 nm that is similar to the interplanar spacing in graphite. The diameter of MWNT ranges from a few to tens of nanometers and its length from micron meters to millimeters showing its one dimensional nature. In addition to this one dimensional quantum geometry with very high aspect ratios. other properties originating from the characteristics of the atomic carbon and nano structure such as good electrical conductivity, stubborn mechanical property, nano size cavity, etc. have motivated its use in various applications. A detailed systematic study on the growth morphology of carbon nanotubes (CNTs) on Si in atmospheric pressure thermal chemical vapor deposition was undertaken. The role of NH_(3) for vertical alignment of CNTs was investigated. The direct cause for the alignment was a dense distribution of the catalytic metal particles, but that the particles are maintained catalytically active under amorphous carbon deposits was established by NH_(3) . It allows a dense nucleation of the CNTs, and consequently, assists vertical alignment through entanglement and mechanical leaning among the tubes. The CNTs grew in a base growth mode and a few direct evidences were presented. Since Ni is consumed both by silicide reaction and by capture into the growing tube, the growth stops when Ni is totally depleted. It occurs earlier for smaller particles, and thus a long time of growth results in a thin bottom with poor adhesion. Well-aligned carbon multiwall nanotubes (MWNT) arrays have been continuously synthesized by thermal chemical vapor deposition method involving the pyrolysis of acetylene gas on catalytic metal coated on substrate. Aligned carbon nanotubes (CNTs) have attracted great attention because of their unique structural and electrical properties, which can be used in a broad range of potential applications. Here, we propose on synthesis of carbon nanotube arrays in the trench structure for triode type field emitters and SOG (spin on glass) coating process. Carbon nanotube arrays stick to the substrate firmly due to SOG coating. Trimming process was conducted to get a uniform height of carbon nanotubes related to uniform current density for large area, with a goal of fabricating their display application and better controllability of carbon nanotubes. We observed densely aligned carbon nanotube arrays and investigated emission property of carbon nanotube arrays in the trench structure. To fabricate CNT based triode structure field emitter, conventional semiconductor process was used, such as photolithography, etching, and lift-off process. It is essential to form selective growth of carbon nanotubes for FED emitters and electronic devices We have produced an aligned carbon Nanotube arrays in the trench structure that has a side length of 5㎛ by 5㎛, 10㎛ by l0㎛ respectively and 10㎛ depth in order to CNTs fabricated field emitters using thermal chemical vapor deposition. These nanotubes with diameters in a range of 40∼6Onm are well graphitized and typically consist of above 40 concentric shells of carbon sheets. Furthermore, we obtained CNT mays with uniform length and high controllability through SOG coating process and trimming process. These results bring us closer to achieving structural control over nanotubes for adapting to the field emitters. A new approach to synthesizing carbon nanotubes on substrates was undertaken. Instead of conventional metallic catalyst nanoparticles such as Ni, Co, and Fe, which are usually deposited by physical vapor deposition, a magnetic fluid of surfacted magnetite nanoparticles can be successfully applied by a simple spin coating method for carbon nanotubes synthesis in chemical vapor deposition method. Mixing with polyvinyl alcohol before applying on plane substrates controlled the viscosity of the magnetic fluid. The polyvinyl alcohol evaporates during heat-up to the synthesis, and vertically aligned dense carbon nanotubes could be grown on the agglomerated magnetite nanoparticles.

염료 감응형 태양전지용 두 결합자리를 갖는 염료

최규석 群山大學校 2019 국내박사

Dye-sensitized solar cells (DSSCs) have been the focus of intensive research due to its potential of generating solar energy with low production cost compared to its inorganic counterparts. One of the main component in DSSCs is the photosensitizer which have a great influence in its solar-to-electric conversion efficiency. So far, the Ru based sensitizers like N3, N719, and the so called black dye, exhibited efficiencies greater than 10 %. Recently, the performance of organic dyes also has been remarkably improved. Therefore, it is expected that these organic dyes could eventually overtake the performances of the Ru-based dyes. Organic dyes are much more ideal than the Ru-based dyes mainly because of its lower production cost. It has also a molar extinction coefficient, easy control of the absorption wavelength range, facile design and synthesis. Two spiro-like organic dyes linked at the thiophene bridge (KS-11 and KS-12) together with the original rodshaped D-π-A configuration (KS-10 designed, synthesized, and characterized based on their electronic structure, and determine the photophysical and photovoltaic properties for its application in dye-sensitized solar cells. Compared to KS-10, the double D-π-A spiro-like configuration, which consists of two separated light-harvesting moieties,was found to be beneficial to photocurrent generation provided that they are separated properly to prevent intramolecular exciton annihilation. This was observedwhen KS-11,which is linked at the β-position of the thiophenemoiety of D-π-A, was compared with KS-12, where the two D-π-A are linked with an additional thiophene using a α-β linkage. The results showthat KS-12 produced a 20% and 17% increase in photovoltaic efficiency under simulated AM 1.5G solar irradiation compared to KS-11 and C1, respectively. This increase in photovoltaic performance is credited mostly to the reduction of recombination effects and the increase in the density of states at the semiconductor surface due to high dye loading and better charge-transfer properties. Cell efficiency of KS-10, KS-13 and KS-14 were compared. Comparing to efficiency 4.70% of mono-anchoring dye KS-10, di-anchoring dyes KS-13 and KS-14 produced much lower efficiency 1.01% and 2.62% respectively. In KS-13 and KS-14, the distance (6Å) between two carboxylic group is too shorter comparing to optimum distance (10Å) for efficient binding on TiO2. Thus, there are no positive effect for binding ability and the amount of dye absorbed on TiO2. Especially, the very low efficiency of KS-13 can be explained by too many oxygen atoms of two ester groups in KS-13 can induce easy approach of I3- to TiO2 surface. For Dye-sensitized solar Cell(DSSC), KS-15, bridged dyes KS-16 and KS-17 were synthesised. Three dyes show strong absorption at 400-550nm. Molar extinction coefficients of KS-15, KS- 16 and KS-17 are 38,500(473nm), 72,368(477nm) and 65,150(484nm) respectively. KS-17 show slightly red shifted absorption comparing to KS-15 and KS-16 because of two donor groups were conjugated in KS-17. Monoanchoring dye KS-15 produced lowest efficiency 2.85%. KS-16 and KS-17 give much higher efficiency 5.77% and 5.44% respectively. Using KS-16 and KS-17, optimization of cell fabrication such as dipping solvent, time and electrolyte is under study. Introduction of longer conjugated spacer to KS-16 and KS-17 could improve cell efficiency.

극한의 개념 지도에 관한 연구

최규석 전남대학교 교육대학원 1993 국내석사

현대 과학기술사회에서 광범위하게 응용되는 현대수학의 해석학 분야는 극한개념을 바탕으로 모든 이론이 전개된다. 본 논문에서는 고등학교 수학교과과정에서 효율적인 극한개념을 지도하기 위하여, 극한개념의 기원과 개념확립과정의 역사적인 배경을 고찰하고 극한개념의 기초를 분석하였다. 이를 토대로 수열, 무한급수, 함수의 극한, 연속함수, 도함수, 정적분 등으로 제기되는 극한개념을 고찰하고 지도방안과 지도상의 유의점등을 제시하였다. The theory of the modern mathematical analysis which is widely applied in modern technological society is developed on the concept of limits. In this paper, we study the effective method of teaching the concept of limits. To do this, we survey the historical evolution of the limit concept and analyize the concept. And then we investigate the various limit concepts in secondary school mathematics curriculum, Finally, we suggest a few effective methods and advices to teach the concept of limits.

11-Hydroxyaclacinomycin X의 종간 스케일링에 있어서 단백결합의 역할

최규석 충북대학교 2009 국내석사

11-Hydroxyaclacinomycin X (HAMX) is isolated from S. galiaeus 3113 (pMC213) with main anti-cancer effects. The pharmacokinetics of HAMX, which has the inhibitory effects on DNA synthesis as well as topoisomerase like other anthracyclines, was investigated in mice, rat, rabbits and beagle dogs after i.v. bolus administration. To support its pharmacokinetic study which was essential for the pre-clinical research for new drug development, the total body clearance (CLt), apparent volume of distribution at steady state (Vdss) and terminal half-life (t1/2) were calculated. CLt, Vdss and t1/2 were 73.7 ml/mim/kg, 18.1 L/kg and 219 min in mice, 64.0 ml/min/kg, 10.9 L/kg and 227 min in rats, 47.2 ml/min/kg, 21.3 L/kg and 206 min in rabbits, and 27.4 ml/min/kg, 2.24 L/kg and 118 min in dogs, respectively. Based on animal data, CLt, Vdss and t1/2 of HAMX was predicted in humans using simple allometry and invariant time methods. The corresponding allometric equations were CLt = 45.896W0.8452, CLt × MLP = 31.175W1.1405, Vdss = 10140W0.8653 and t1/2 = 178.43W-0.0883. These allometric equations were extrapolated to predict CLt, Vdss and t1/2 in human based on 70 kg body weight. Plasma concentration of HAMX was also predicted by several species-invariant time transformations using equivalent time, Kallynochron, Apolysichron and Dienerichron. The human pharmacokinetic parameters of CLt, Vdss and t1/2 predicted by the simple allometry and various species-invariant time methods were 17∼42 ml/min/kg, 6∼19 L/kg and 112.5∼399 min, respectively. Plasma and cytosol protein binding of drug is an important factor that influences its pharmacokinetic parameters. To predict human CLt based on the unbound drug concentration in plasma and cytosol (fu), protein binding of the drug was assessed in vitro at five concentration levels (1, 5, 10, 50, 100 μg/ml) in plasma and cytosol using equilibrium dialysis and followed by HPLC analysis. The method was optimized against some influencing factors during both experimental procedures. And it was validated to be specific, sensitive, accurate, precise and of satisfactory recovery. The free fraction in plasma (fu) was 0.104 in mouse, 0.081 in rat, 0.049 in rabbit, 0.012 in dog, 0.011 in human, respectively. It exhibited a difference from mouse to human for the plasma and cytosol protein binding of 11-Hydroxyaclacinomycin X. Unbound clearance (CLt, u) was 707.68 ml/min/kg in mouse, 790.12 ml/min/kg in rat, 963.26 ml/min/kg in rabbit, 2258.33 ml/min/kg in dog, respectively. Based on animal data, the unbound clearance of HAMX was predicted in humans. The results indicated that HAMX data obtained from animals could be utilized to generate preliminary estimates of the pharmacokinetic parameters in humans. These parameter can serve as guidelines for better planning of clinical studise.

오존工程에서 ORP의 適用에 關한 基礎的 硏究

최규석 嶺南大學校 大學院 2003 국내석사

Determining the optimum ozone dosage in the ozonation process is one of the most important control factors in the operating management. this study researched the application of ORP as the overall index of water in determining the suitable ozone dosage. The experiments were carried out to find out the removal trend of target substances, variation of ORP and dissolved ozone(d-O_3) when the ozone was reacted with the directly reacting substances, indirectly reacting substances and complexly reacting substances. From the experiments, several things were found as follows. The ORP variations were separated into "the Ozone consumption region (R_1)", "the steep increasing region of ORP (R_2)", and a kind of "Dynamic equilibrium region (R_3)". The adequate points to control the ozone dosage were the Point1 (initial point of R_1), Point2 (initial point of R_3), and equivalent point (nearby half of R_2) on that the slope is changed steeply. In case of Fe^(2+) and phenol which react directly with ozone, the R1 region was increased in proportion to the initial injecting concentrations. The minimum concentrations were shown within Point1 of single solution and mixed solution. The d-O_3 concentration of this point was measured at 0~0.24mg/L which is similar or lower than the standard value of d-O_3 method (0.1~0.2mg/L). With Tert-butanol and Parathion-methyl which are the indirectly reacting substances, the R1 region was constant regardness of the initial injecting concentrations. The minimum concentrations were shown within Point2 of single solution and mixed solution The d-O_3 concentration of this point was detected at 1.19~1.98mg/L which is higher than the standard value of d-O_3 method. In case of humic acid, it showed the similar trend with directly reacting substances, which showed increasing R1 region in proportion to the initial concentration. And the minimum concentration was shown at equivalent point (nearby half of R_2). Therefore it was estimated that humic acid has the inclination of both directly reacting substances and indirectly reacting substances. Consequently, the purpose of treatment can be fulfilled by controlling the ozone dosage according to Point1, Point2, and equivalent point as well as the reactivity of ozone with target substances.