부하변동이 존재하는 DC 모터의 속도 제어를 위한 외란관측기 설계

김성종,신명준,손영익,김갑일,임승철,강환일 明知大學校 産業技術硏究所 2007 産業技術硏究所論文集 Vol.26 No.-

This paper considers a speed control problem of DC motor under load variations. In order to reduce the effect of load variation, a disturbance observer has been designed for the given system. With a cheap encoder there exists considerable measurement noise in the velocity feedback and it should be reflected in designing the disturbance observer. The authors have obtained the nominal transfer function of a DC motor and designed a disturbance observer for the control purpose. With the disturbance observer a digital controller has been implemented using a DSP(TMS32OF2812). Some experiments show the enhanced performance of the control system with the proposed method.

Nevile-Winther's Acid의 Azocopling 反應에 關한 硏究

金容仁,金鍾明 弘益大學校 1981 弘大論叢 Vol.13 No.-

The azocoupling reaction of Nevile-Winther's acid with several meta-and para-monosubstituted benzenediazonium salts has been studied kinetically in aqueous solution buffered at pH 5. The activation energies measured in the coupling reaction of Nevile-Winther's acid with diazotized m-nitroaniline, p-nitroaliline, sulfanilic acid, m-anisidine, p-anisidine, m-toluidine, p-toluidine, p-fluoroaniline, p-chloroaniline, p-bromoaniline, p-iodoaniline and aniline are 6.27, 5.84, 7.51, 12.05, 13.22, 12.25, 12.83, 10.12, 9.20, 8.60, 8.26 and 11.52 Kcal/mole, respectively. The rate for coupling reaction is more favorable in the presence of an electron-withdrawing group in active components than in the presence of electron-donating group. We observed that the coupling reaction with diazotized m-nitroaniline proceeds 400 times more rapidly than that with the benzenediazonium salt, which is coupled 20 times faster than p-methoxy benzenediazonium salt. A linear free energy relationship has been essentially observed except for three parasubstituted active components, for which the extended Hammett plot treated by Yukawa-Tsuno permits a good log k/k???=ρ[σ+rΔσ??????] linear relationship when considering the mesomeric effect. The calculated reaction constant of thses azocoupling reactions is ρ=3.51. The reaction constant of resonance contribution r is calulated as r=0.32. In the case of the reaction with para-halo-substituted active components, the reaction rate increased in the order of p-fluoroaniline, p-chloroaniline, p-bromoaniline and p-iodoaniline, contributing partially to the solvation effect. 1. 緖 論 2. 實驗方法 2-1. 試藥 및 實驗裝置 2-2. p-置煥 haloaniline 類의 合成 2-2-1. p-fluoroaniline의 合成 2-2-2. p-chloroaniline의 合成 2-2-3. p-bromoaniline의 合成 2-2-4. p-iodoaniline의 合成 2-3. p-置煥 haloaniline의 純度試驗 2-4. passive components의 coupling value 試驗 2-5. active component 反應溶液의 調製 2-6. 比色定量用 azo化合物의 合成 2-7. 比色定量用 azo化合物의 paper chromotography 2-8. 檢量線의 作成 2-9. azocoupling反應 2-10. azo化合物의 定量 2-11. passive component의 이온常數 測定 3. 實驗結果 및 考察 3-1. p-置煥 haloaniline類의 合成結果 3-2. Nevile-Wintber's acid의 coupling value 3-3. Nevile-Winter's acid와 一置煥 benzenediazonium鑒類의 coupling 反應 3-4. activation parameters 3-5. Nevile-Wintber's acid의 azocoupling反應性 3-6. active component 分子內의 置煥基效果 3-7. Hammett 則의 適用 4. 結 論

除草劑를 利用한 이태리포풀러 苗圃床의 雜草防效果

鄭丞根,金洪殷,李喆求,李明煥 충북대학교 농업과학기술연구소 1989 農業科學硏究 Vol.7 No.2

This experiment was conducted to screen useful herbicides for Populus euramericana Gainer nur-sery at the Chungbuk Forestry Experiment Station in 1988. Soil surface treatment of 11 herbicides was made on May 19 after planting Populus euraneicana G. cuttings. Digitaria sanguinalis(L.) Scopp, Chenopodium album var. centrorubrum Makino, Portulaca oleracea L., Eleusine indica(L.) Gaertner and Echinochloa crusagali (L.) Beauv. var. praticola Ohwi were dominant weeds in the nursery. Among herbicides tested, alachlor G, alachlor+pendimethalin G, Metolachlor+prometryn EC and oxyfluorfen EC were effective to control both grasses and broad-leaf weeds effectively, but the falter two chemicals resulted in severe damage to Populus euramericana. The growth of cuttings measured by basal diameter and height showed no significant difference among treatments and he-rbicides except oxyfluorfen. Significant correlations were observed between weed coverage 2 weeks after herbicide treatment and number of weeds 1 month and 3 months after herbicide treatment. Also, number of weeds after 1 month was significantly correlated with that of 3 months after herbicide treatment.

선진산업국의 기업복지 발달과정에 관한 연구

김의명,강종수 大邱大學校 社會科學硏究所 1999 社會科學硏究 Vol.6 No.3

본 연구는 일차적으로 미·영·독·일 등의 공업화가 일찍 시작된 선진산업국의 기업복지 발달과정을 시대사적으로 검토하고 각 단계에서의 역사적 의미와 성장요인들에 대해 살펴보고, 다음으로 이러한 시대사적인 발달과정에 영향을 미친 분석적 요인들과 그 배경에 관해 검토해 보고자 시도되었다. 일반적으로 기업복지는 비록 국가에 따라 공업화의 진행정도가 다름에도 불구하고 초기 자본주의 단계에서는 노동복지에 대한 국가의 개입정도가 미약하고 노동자계층의 조직화정도 역시 미약하여 사용자의 온정적·자혜적 성격으로 혹은 일부 노동통제적 성격으로 기업복지가 제공되어 오다가, 국가가 개입의 필요성을 인식하고 입법적 강제를 통해 서서히 소극적 보호가 진행되면서 근로자 역시 단결의 방법을 통해 내부 역량을 강화하고 대외적으로 복지요구를 확대해 갔다. 독점자본주의기를 끝마치면서 정치·경제가 급속히 발달하면서 기업복지 역시 공공복지와 자주복지 사이에서 상대적인 중요성을 더욱 부각시키면서 다종 다양하게 발달하게된 전기가 되었는데 노동운동이 확고하게 자리를 잡게 되자 더 이상 사용자의 은혜적인 시혜가 아닌 단체교섭의 장으로 끌어들임으로써 권리화하는 계기가 되었고 사용자 역시 기업복지비를 노동비용으로 인식하여 노동생산성의 개념과 결부하여 고려하게 되었다. 더욱 발달된 단계에서는 공공복지와 상대적으로 미약해진 자주복지사이에서 상호 일정한 관계내에서 조화로운 역할분담으로 이어지는 성숙기로 접어들게 되었다. 이러한 과정속에서 기업복지는 초기의 열악한 근로조건과 저임금에 대한 사용자의 온정주의와 인도주의에 의해 근로자에게 단순한 노무관리적 차원에서 일방적으로 제공되어 왔으나 국가의 복지정책 및 노동정책의 방향, 노동운동의 방향과 단결력의 정도, 사용자의 인식과 경영전략, 산업의 필요와 다양한 근로자계층의 출현, 노동시장에서의 수급상황과 경기순환 등의 요인들이 서로 상호 복합작용을 하면서 꾸준히 발달하면서 그 대상과 수혜의 범위를 확대해 오고 있다.

고진공내의 데칸용매하에서 요오드화메틸이 피리딘 및 α-피콜린과의 착물형성에 관한 연구

김영철,임종완,김명자 漢陽大學校 環境科學硏究所 1992 環境科學論文集 Vol.13 No.-

고진공내의 데칸용매하에서 요오드화메틸의 용해도를 5, 15 25℃에서 피리딘과 α-피콜린이 존재할때와 존재하지 않을 때의 두 경우에 대하여 각각 측정하였다. 데칸용매내에 피리딘과 α-피콜린이 존재할 때 요오드화메틸의 용해도가 존재하지 않을 때 보다 더 크고 α-피콜린과 요오드화메틸과의 상호작용이 피리딘과의 상호작용보다 더 강하게 작용한다는 것을 알 수 있었다. 그리고 피리딘과 α-피콜린이 데칸용매내에 존재할 때 요오드화메틸과 피리딘 및 α-피콜린이 각각 불안정한 Complex를 형성한다고 생각되어 이 Complex를 여러 경우의 비율로 가정하여 게산해 본 결과 1 : 1Complex를 형성한다고 보는 경우의 평형상수 K 값이 비교적 일저한 값을 나타내었다. 그러므로 1 : 1Complex 즉 CH₃I·??과 CH₃I·α-??이 영액속에 형성됨을 알았다. 그리고 피리딘과 α-피콜린의 요오드화메틸과의 Complex의 안정도를 이와 대응하는 요오드화에틸과 요오드화 n-프로필과 비교하여 보았다. 또한 이 Complex의 생성에 대한 엔탈피, 자유에너지 및 엔트로피의 변화도 산출하였다. The solubilities of methyl iodide in decane on high vacuum were measured at 5℃, 15℃ and 25℃ in the presence and absence of pyridine and α-picoline. When pyridine and α-picoline exist in system respectively, the solubilities of methyl iodide in the presence of puridine and α-picoline are greater than in the absence, and the interaction of methyl ildide with α-picoline is stronger than with pyridine. In the presence of pyridine and α-picoline, it could be though that methyl iodide forms unstable complex with pyridine and picoline. The complex was assumed in various ways and it was evaluated that the equilibrium constant K value was relatively constant under the assumption of 1 : 1 complex. Thus, 1 : 1 complexes, CH₃I·C??H??N and CH₃I·α-C??H??N, are formed in the solution. And the stability of the complex of methyl iodide with pyridine and α-picoline are compared with similar complexes of pyridine and α-picoline with ethyl iodide and n-propyliodide. Also, the changes of enthalpy, free energy and entropy for the formation of the complex were calculated.

무용전공 여자대학생의 건강에 대한 지식, 태도 및 행위에 관한 연구

박종성,김명자,유영규 명지대학교 예체능연구소 2002 藝體能論集 Vol.13 No.-

The purpose of this survey was to investigate health education level of women college students major in dance from health knowledge, health attitude and health behavior aspect, the questionnaire survey was carried out for 320 students of 4 universities of seven other areas respectively. Questionnaire contents covered smoking, drinking alcohol, irradiation by X-ray, cause of cancer, fatigue and necessity of physical examination. The result of the survey showed as follows; 1, 67% of total students responded with proper health knowledge. It showed that the health knowledge more higher level than health attitude and behavior aspects. 2. 54% of total students responded with right health attitude. It showed that the health attitude more higher level than behavior aspects. 3. 52% of total students responded with right behavior aspects. It showed that the behavior aspects smallest level than health knowledge and health attitude. 4. It appeared that inter-relation between health knowledge, attitude and behavior aspects showed a statistically significant difference (P<01).

초등학교 태권도 교육의 실태 분석 및 발전 방안

이종목,김영명 東亞大學校附設스포츠科學硏究所 1996 스포츠科學硏究論文集 Vol.14 No.-

The purpose of this study was to investigate the actual condition analysis and developmental direction about the taekwondo education of national sport by elementary teachers. The conclusion obtained from this study were as follows; 1. The fifth, sixth grades of elementary teachers were 7.5% over one year for the Taekwondo training experience, who were had 3.7% a grade-holder, coaching was hardly 7.5% teachers. 2. Professional physical education teacher assigned cause was able to the coaching taekwondo of 77.3% teachers, professional physical education teacher assigned school was 27.5% elementary school. 3. The taekwondo of national sport and olympic official event assigned were known in each 88.8%, 92.5%, 85.0% teachers, but they're claimed that taekwondo was include physical education in course of education by 93.7% teachers. and They are understand only 50.0% teachers really understanding taekwondo. 4. The taekwondo education aims was reach only the 50.0% teachers. 5. The taekwondo education was except regular curriculum of course in activity club(5.0%), activity special(3.8%), that being so teaching attained the 78.4% by invitation or emeritus teachers.

분산전원 전력품질 모니터링 시스템을 위한 임베디드 하드웨어 테스트

辛明俊,金晟鍾,孫瑛翼 明知大學校 産業技術硏究所 2007 産業技術硏究所論文集 Vol.26 No.-

When distributed powers are interconnected to the grid, lack of source stability may cause some events that should be measured and stored as soon as they occur. This paper presents a real-time hardware system that has been developed for quick and reliable monitoring of the distributed powers quality. The system is composed of a digital signal processor (MPC741O, Motorola) and a 16 bits A/D board (VMIVME3I22, GE). To guarantee the real time operation, it is based on a real time OS (VxWorks). Hardware tests of the embedded system have been made to check the performances of the proposed system. Test signals of several events are generated by using a LabView (hardware) system. The tests show that the system complies with the desired IEEE standard for power quality monitoring.

광조사 방식이 복합레진의 중합과 누출에 미치는 영향

박종진,박정원,박성호,박주명,권태경,김성교 大韓齒科保存學會 2002 Restorative Dentistry & Endodontics Vol.27 No.2

The aim of this study was to investigate the effect of light irradiation modes on polymerization shrinkage, degree of cure and microleakage of a composite resin. VIP^™ (Bisco Dental Products, Schaumburg, IL, USA) and Optilux 501^™(demetron/ Kerr, Danbury, CT, USA) were used for curing Filtek^™ Z-250(3M Dental Products, St. Paul., MN, USA) composite resin using following irradiation modes: VIP^™ (Bisco) 200mW/cm^2 (V2), 400mW/cm^2 (V4), 600mW/cm^2 (V6), Pulse-delay (200 mW/cm^2 3 seconds, 5 minutes wait, 600mW/cm^2 30seconds, VPD) and Optilux 501^™ (Demetron/Kerr) C-mode (OC), R-mode (OR). Linear polymerization shrinkage of the composite specimens were measured using Linometer (R&B, Daejeon, Korea) for 90 seconds for V2, V4, V6, OC, OR groups and for up to 363 seconds for VPD group (n=10, each). Degree of conversion was measured using FTIR spectrometer (IFS 120 HR, Bruker Karlsruhe, Germany) at the bottom surface of 2 mm thick composite specimens. V2, V4, V6, OC groups were measured separately at five irradiation times (5, 10, 20, 40, 60 seconds) and Or, VPD groups were measured in the above mentioned irradiation modes (n=5, each). Microhardness was measured using Digital microhardness tester (FM7, Future-Tech Co., Tokyo, Japan) at the top and bottom surfaces of 2mm thick composite specimens after exposure to the same irradiation modes as the test of degree of conversion(n=3, each). For the microleakage test, class V cavities were prepared on the distal surface of the ninety extracted human third molars. The cavities were restored with one of the following irradiation modes: V2/60 seconds. V4/40 seconds, V6/30 seconds, VPD, OC and OR. Microleakage was asessed by dye penetration along enamel and dentin marigns of cavities. Mean polymerization shrinkage, mean degree of conversion and mean microhardness values for all groups at each time were analyzed using one-way ANOVA and Duncan's multiple range test, and using chisquare test for microleakage values. The results were as follows: ·Polymerization shrinkage was increased with higher light intensity in groups using VIP^™(Bisco) : the highset with 600mW/cm^2, followed by Pulse-delay, 400mW/cm^2 and 200mW/cm^2 groups. The degree of polymerization shrinkage was higher with Continuous mode than with Ramp mode in groups using Optilux 501^™ (Demetron/Kerr). ·Degree of conversion and microhardness values were higher with higher light intensity. The final degree of conversion was in the range of 44.7 to 54.98% and the final microhardness value in the range of 34.10 to 56.340. ·Microleakage was greater in dentin margin than in enamel margin. Higher light intensity showed more microleakage in dentin margin in groups using VIP^™ (Bisco). The microleakage was the lowest with Continuous mode in enamel margin and with Ramp mode in dentin margin when Optilux 501^™ (Demetron/Kerr) was used.

호텔커피숍의 메뉴가격결정에 관한 연구

河宗明,金琪訓 진주여자전문대학 1993 論文集 Vol.16 No.-

Modern hotels have grown bigger in those sizes and have made a high class in those facilities in the social, economic changes recently. Hotel management is given much more weigh food & beverage sale than room service department. accouding to situation, the sucess or failure of F & B business is determined by kind service of employees, food qualty, and atmosphere which gives consideration of customer preference, good facilities for coffee shop as well as by the accurate market analysis and positive activity of sales promotion. Therefore, the result of this study is as following ; 1. In the menu planning, it is required that are rational menu management, good location, and good facilities management. 2. In the menu pricing, it is considered that are customer' needs, sales cost, and competition of hotel. 3. In the menu pricing, it is required that are customer's orieted menu development and profit.