건강과 행복을 추구하는 창원시설공단 경영혁신 우수사례

최원수(Won Soo Choi)(崔元洙) 한국지방공기업학회 2007 한국지방공기업학회보 Vol.3 No.1

우리 공단은 지난 2000년 2월 10일 창원시에서 10억원의 전액 현금을 출자하여 설립한 지방공기업으로 약 300여명의 직원이 시로부터 위탁 받은 스포츠, 청소년, 문화예술, 환경, 교통, 노인복지 시설 등을 경영하고 있다. ‘공단의 존재 이유는 시민’이라는 경영이념으로 경영전략체계를 정립하였으며, 2005부터 경영혁신을 추진하여 공단의 내·외부 환경 변화에 대응하여 ‘혁신은 선택이 아닌 필수’라는 사실을 인지하고, 직원들의 의식혁신을 위해 혁신아카데미 운영과 혁신관련 설문조사를 실시하였다. 일하는 방식 개선 및 효율적인 인력관리로 2년간 26명의 인력을 감축하여 연간 1,073백만원 인건비를 절감하였으며, 최근 2년간 수입규모 2배 증가와 수지율 90%로 연평균 22.5% 향상되어 공기업으로서 공익성과 수익성의 조화로운 성과를 거두고 있다. 그 결과 외부평가에서도 호평을 받아 행정자치부 주최 2006년 경영평가 ‘가’등급, 지방공기업학회 주최 제1회 경영혁신우수사례 최우수상 수상, 작년에 이어 2년 연속 대한민국 스포츠레저문화대상을 수상함으로서 일류 공기업으로 도약하고 있다. Changwon City Facilities Management Corporation, as a local public firm which Changwon city established by investing on billion won on Feb. 10, 2000, manages sports, juveniles, culture and arts, environments, traffics, facilities for welfare of the aged along with about three hundred staffs. On the basis of its corporate philosophy, 'Citizens, the reason for our existence', it set the management strategy system. And it has promoted managerial innovation since 2005 to let its members recognize that the innovation is not optional but essential, and operated an innovation academy and performed innovation-related questionnaire surveys for innovation in consciousness of all staffs. It settled complaints of customers positively through VOC, reduced the classes of standard plastic garbage bags from 40 to 8, developed and operated various programs for each facility, and held a conference for innovation in customer services. As a result, the monthly survey for customer satisfaction measurement showed improvement by ten points compared to the last year for the first time as a public firm. For innovation in the result-oriented organizational culture, it introduced BSC system to improve the compensation system which reflects the result of BSC performance on the assessment of an employee's performance, and reduced the team-based system consisting of four departments and three teams. In addition, it realized a win-win situation by overcoming labor-management conflicts and establishing peaceful labor-management relations. It has improved the service qualities of facilities by advancing convenient and main facilities and is forming sports complex of 36,300 square meters near the city center as a sports park. It is setting up FMS for efficient management of facilities and saved 0.1 billion won through ESCO program. It has downsized the work force (26 staffs) for two years and saved personnel expenses of 1.073 billion won every year. The income for the latest two years has risen and the ratio of earnings and expenses, which has been improved by 22.5% every year, was 90%. It is obtaining harmonious results in both public benefits and earnings as a public firm. Accordingly it gained public favor from the external evaluation. It ranked the first class from the managerial evaluation by the Ministry of Government Administration and Home Affairs in 2006 and received the first prize of excellent managerial innovation case by The Korean Association for Local Public Enterprises and so on. It is jumping up to the first-class public enterprise in Korea.

온수배관을 이용한 온실의 난방성능

윤용철(Yong Cheol Yoon),신익수(Yik Soo Shin),김현태(Hyeon Tae Kim),배승범(Seoung Beom Bae),최진식(Jin Sik Choi),서원명(Won Myung Suh) (사)한국생물환경조절학회 2012 생물환경조절학회지 Vol.21 No.2

본 연구는 온실의 난방 에너지 절감을 목적으로 온실 내부에 알루미늄 온수배관을 설치하여 난방효과에 대한 기초자료를 구축하고자 수행되었다. 그 연구결과를 요약하면 다음과 같다. 전체 실험을 포함하여 온실내의 높이별 온도편차는 4.0~7.0℃ 정도의 범위로서 그 차이가 크게 나타났다. 팬코일유니트(FCU)를 작동시킨 경우가 작동시키지 않은 경우에 비해 유출입수의 온도차가 3.3℃ 정도 크고, 소비전력량은 36.2~40.1% 정도 증가하였으며, 시간당 방열량은 44.6~52.0% 정도 증가하는 것으로 나타났다. 실험기간동안 순환유량은 0.48~0.49L · s<SUP>?1</SUP> 정도의 범위에 있었고, 평균유속은 1.53~1.56m · s<SUP>?1</SUP> 정도였다. 유출입수의 평균 온도차는 6.24~11.50℃이었다. 최저 외기온 ?14.0~?0.6℃ 범위에서 설정온도별 방열량은 135,930~307,150㎉ 정도의 범위로서 시간당 9,610~19,630㎉ · h<SUP>?1</SUP> 정도의 범위에 있었다. 이것은 최대난방부하의 약 23~53% 정도의 난방에너지를 공급할 수 있을 것으로 나타났다. 전체 방열량과 소비전력량은 각각 2,548,306㎉ 및 3,075.7㎾h이다. 화석연료인 경유로 난방할 경우, 소요되는 경유의 총 소비량은 281.6L 정도이고 비용은 321,000won인 것으로 나타났다. 농가용 전력요금을 적용하면 전력사용에 대한 총비용은 110,730won 정도로서 경유 소비 비용의 33.5% 정도로 나타났다. 실험구의 온도가 대조구보다 약 8.3~14.6℃ 정도 높게 나타났다. This research was conducted to obtain basic data with regard to the heating performance that would be produced by installing an aluminum hot water pipe inside the greenhouse with the goal of reducing the heating energy in greenhouse. The research results are summarized as follows. The degree of difference in relation to the temperature by height within the greenhouse during the entire experiment was significant - within the range of 4.0~7.0℃. The temperature difference between incoming and outgoing water was about 3.3℃ greater when FCU was activated compared to when it was not activated. Meanwhile, the amount of energy consumed increased about 36.2~40.1%. The amount of pyrexia per hour also increased by 44.6~52.0%. During the experiment period, circulated flux was within the range of 0.48~0.49 L · s<SUP>?1</SUP> while average fluid speed was 1.53~1.56 m · s<SUP>?1</SUP>. The average temperature difference between incoming and outgoing water was 6.24~11.50℃. The amount of heating value by each set temperature within the minimum outdoor temperature range of ?14.0~?0.6℃ was 135,930~307,150 ㎉, and the range was within the 9,610~19,630 ㎉ · h<SUP>?1</SUP> per hour. This demonstrated that about 23~53% heating energy of the maximum heating load could be supplied. Total radiating value and amount of energy consumed were 2,548,306 ㎉ and 3,075.7 ㎾h, respectively. When heating takes place using oil, which is a fossil fuel, the total amount of light oil consumed was 281.6 L while the cost was 321,000 won. When the electricity cost for farms is applied, the total cost was about 110,730 won, which is about 33.5% of the cost required compared to oil consumption. The temperature at in the experiment area was about 8.3~14.6℃ higher compared to that of the control area.

Long-term outcomes of single-port laparoscopic myomectomy using a modified suture technique

( Mina Kang ),( Jihye Kim ),( Tae-joong Kim ),( Jeong-won Lee ),( Byoung-gie Kim ),( Duk-soo Bae ),( Chel Hun Choi ) 대한산부인과학회 2020 Obstetrics & Gynecology Science Vol.63 No.2

Objective To evaluate the long-term outcomes, including the pregnancy outcome and recurrence rate after single-port laparoscopic myomectomy (LM) using a modified suture technique with a Hem-o-lok clip (Choi’s LM) and conventional 4-port LM. Methods A retrospective study of patients who underwent Choi’s LM (n=55) and 4-port LM (n=102) in a single institutional hospital was conducted. Patients with <3 symptomatic myomas sized <10 cm each and operated on by a single surgeon were included. Recurrence was confirmed when a myoma measuring ≥3 cm was detected. Results The patients in both groups had similar demographic characteristics. Single (76.4% vs. 62.7%) and intramural (52.7% vs. 56.9%) tumors were commonly detected in both groups in the mean diameter (6.8±1.5 cm vs. 7.0±1.6 cm; P=0.40). In Choi’s LM, 16 patients (29.1%) needed an additional port; those who were nulliparous and/or had a large leiomyoma more frequently required an additional port (P=0.023 and 0.04, respectively). During a median follow-up period of 69 months, 17 patients (7.1% vs. 14.6%) had recurrence. The size of dominant myomas at recurrence was significantly smaller in patients who underwent Choi’s LM (3.4±0.7 cm vs. 5.7±2.4 cm; P=0.004). All 13 patients in both groups who successfully conceived had a full-term delivery. No major complications occurred during pregnancy. Conclusion Although an additional port was frequently used, the long-term outcomes of patients who experienced recurrence and pregnancy after Choi’s LM were acceptable. Considering its usability, Choi’s LM is feasible for the treatment of uterine leiomyoma.

결합조직형성 법랑모세포종의 방사선학적 소견 : 증례보고 3례

최다혜,허경회,문제운,이원진,허민석,이삼선,최순철,박관수 대한구강악안면방사선학회 2006 Imaging Science in Dentistry Vol.37 No.1

Desmoplastic ameloblastoma is a rare histologic variant of ameloblastoma. It shows important differences in anatomic distribution, histologic appearance, and radiographic findings compared with the general type of ameloblastoma. It is histologically characterized by an abundance of densely collagenous stroma and radiographically a mixed radiolucent-radiopaque lesion. We present three cases of desmoplastic ameloblastoma. All the patients complained on buccal swelling with or without pain and the sites of occurrence were the anterior and the premolar region. Plain radiographs showed mixed radiopaque-radiolucent lesion with ill-defined or diffuse sclerotic margin and no external root resorption. Additionally, CT scans revealed buccal expansion and relatively well-defined margin of the lesions. The clinical and radiographic features of the presented cases were compared with those of the desmoplastic ameloblastoma in the previous literatures. (Korean J Oral Maxillofac Radiol 2006; 36 : 63-8)

Soy protein formula의 품질비교 조사

최재춘,이수원 成均館大學校 科學技術硏究所 1993 論文集 Vol.44 No.2

This study was conducted to investigate and compare the appearance and nutritional composition of the soy protein formulas, so as to get fundamental data for improvement of quality and competitive-power imported soy protein base formula. The results were summarized as follows: 1. In March, 1993, 3 companies were selling 3 soy base formulas which were packed in tin can, the amounts is 350-400gr. 2. Comparing the appearance of soy base formulas, here are 2 types of powder and 1 granular type. It is necessary to change the weaning food into granular type in order to improve the quality of soy base formulas. 3. The nutrient composition of macro-nutrients, vitamins and minerals are indicated in correspond with infants ages and weights. And these are suitable for recommended dietary allowances for Korean infants. It is recommended to add L-carmtine taurine, copper, vitamin-K, choline and MCT-oil which is easy to deficient in soy base formula and fructooli gosaccaride or growth promoting ingredients of the lactic-acid bacteria. 4. It is necessary to fortify for soy base formula the flavor-improving ingredients (yeast extract, sea tangle etc) like the soy bean flavor. 5. In order to imporve soy protein base formulas, it is necessary to make the products at the base of the age, weight and nutritional requirement of infants. Also, it is needed to develop high quality products which are fortified new ingredient (minor ingredients), vitamins and minerals similar to human milk ingredient.

수리된 복합레진 수복물의 전달결합강도 연구

최수영,정선와,황윤찬,김선호,윤창,오원만,황인남 大韓齒科保存學會 2002 Restorative Dentistry & Endodontics Vol.27 No.6

This study was performed to evaluate the interfacial shear bond strength of base (direct and indirect) and repair composites with aging and surface treatment methods. Direct composites resin specimens (Charisma®, Heraeus Kulzer, Germany) were aged for 5 min, 1 hour, 24 hours, and 1 week in 37℃ distilled water before surface treatment, and then divided into five groups: Group 1, grinding; Group 2, grinding and application of bonding agent; Group 3, grinding, etching with 37% phosphoric acid for 30sec, and application of bonding agent; Group 4, grinding, etching with 37% phosphoric acid for 30sec, silane treatment, and application of bonding agent; Group 5, grinding, etching with 4% hydrofluoric acid for 30sec, silane treatment, and application of bonding agent. Indirect composite resin specimens (Artglass®, Heraeus Kulzer, Germany) were aged for 1 week in 37℃ distilled water and divided into seven groups: Group 1 - Group 5, equal to Charisma specimens; Group 6, grinding, etching 37% phosphoric acid for 60sec, silane treatment, and application of bonding agent; Group 7, grinding, etching with 4% hydrofluoric acid for 60 sec, silane treatment, and application of bonding agent. The repair material(Charisma®) was then added on the center of the surface (5mm in diameter, 5mm in height). The shear bond strength was tested and the data was analyzed using one-way ANOVA and the Student-Newman-Keuls test. The following conclusions were drawn. 1. The shear bond strength of Charisma® specimens aged for 1 hour was significantly higher in Group 2 and Group 5 than in Group 1 (p<0.05), and that of Charisma® specimens aged for 1 week was significantly higher in Group 3 and Group 5 than in Group 1 (p<0.05). No significant difference was found in the bond strength of specimens aged for 5 min and 24 hours. 2. In Group 2 of the Charisma® specimens, there was significant difference between the bond strength of 24 hours and that of 1 week (p<0.05). 3. In Group 4 of the Charisma® specimens, the shear bond strength of specimens aged for 24 hours was significantly higher than the others(p<0.05). 4. There was no significant diiference between the shear bond strength of the Artglass® specimens. 5. Most of the Charisma® specimens showed cohesive fractures. Artglass® specimens that were etched with acid(phosphoric or hydrofluoric) for 30 sec showed more cohesive fractures.

제Ⅳ형 근관에서 System B Plugger tip의 깊이에 따른 근관 충전 효과

최희원,김수미,황호길 大韓齒科保存學會 2008 Restorative Dentistry & Endodontics Vol.33 No.6

The purpose of this study was to evaluate the effect of the apical sealing according to the depth of the System B Plugger tip when root canal was filled with gutta-percha and sealer by Continuous Wave of Condensation technique in the Type Ⅳ canal. 50 simulated resin blocks with J-shaped curvature canals were instrumented by ProTaper (Dentsply Maillefer, Ballagiues, Switzerland) Ni-Ti files using the crown-down technique. Type Ⅳ canals were made using a broken ProTaper F3 Ni-Ti file for making a ledge at 3mm short from the working length. And ProTaper F1 Ni-Ti file was used for perforating resin block. The prepared Type Ⅳ canals were randomly divided into three experimental groups of 15 each according to the depth of System B Plugger tip. All of experimental groups were obturated with Continuous Wave of Condensation technique. The length of gutta-percha and sealer in lingual of the Type Ⅳ canals was measured with a measuring digital calliper under magnifying glass (x 2.3). The results are as follows : 1. In control group, there was no gutta-percha and sealer in lingual canal. 2. 3 mm group showed relatively more gutta-percha than 5mm or 7 mm group (p<0.05) 3. 7 mm group did not showed gutta-percha and relatively more void were observed than 3mm or 5 mm group. (p<0.05) In conclusion, within the limits of the results of this experiment, the 3 mm depth of System B Plugger tip was acceptable for obturating the Type Ⅳ canal. 본 연구의 목적은 제 Ⅳ형 근관에서 Continuous Wave 가압법을 이용하여 충전할 때 System B Plugger tip의 깊이에 따른 근단부 밀폐효과를 평가하기 위함이다. 50개의 J형 만곡을 갖는 레진 블록에 부러진 F3 ProTaper파일을 이용해 근관장에서 3mm 지점에 ledge를 형성한 후, F1ProTaper Ni-Ti file을 이용해 레진 블록을 천공시켜 제 Ⅳ형 근관을 형성하고 System B Plugger tip의 깊이에 따라 3개의 실험군과 1개의 대조군으로 분류하였다. 제 Ⅳ형 근관의 거터퍼쳐와 실러의 길이는 확대경하에서 캘리퍼를 이용해 측정하였고 다음과 같은 결과를 얻었다. 1. 대조군의 설측 근관에서 거터퍼쳐와 실러 모두 관찰되지 않았다. 2. 3 mm군에서는 5mm또는 7mm군에 비해 유의하게 많은 거터퍼쳐의 충전이 관찰되었다 (p<0.05). 3. 7 mm군에서는 유의하게 많은 빈 공간이 관찰되었다 (p<0.05).

원자력 사고후 쌀알과 배추내 ^90Sr 및 ^137Cs 농도 예측

최용호,임광묵,황원태,이한수,이창우 대한방사선 방어학회 2002 방사선방어학회지 Vol.27 No.3

원자력 사고후 시간경과에 따른 작물체내 핵종 농도를 보다 현실적으로 예측할 수 있는 방법을 수립하고 단위 건침적에 대하여 백미와 배추내 ^90Sr 및 ^137Cs의 50 년간 농도를 예측하였다. 비생육기 사고의 경우 농도는 두 핵종 모두 시간경과에 따라 서서히 감소하였고 50년 내내 ^90Sr이 ^137Cs보다 높았다. 생육기 사고의 경우 처음 1년간 농도는 비생육기 사고에 비해 대체로 ^90Sr은 최고 30 배, ^137Cs은 최고 1,000 배 정도까지 높았다. 50 년간의 누적농도는 백미에서는 비 생육기 사고의 경우 ^90Sr이, 생육기 사고의 경우 ^137Cs이 더 높았으나 배추에서는 어느 경우에나 ^90Sr이 더 높았다. 생육기 사고시 50년간의 누적농도에 대한 지배적 경로는 대체로 ^90Sr의 경우 뿌리흡수, ^137Cs의 경우 작물체 직접오염이었다. 재부유의 영향은 무시할 수 있을 정도였다. 예측 결과에 입각하여 사고 조건별로 대책의 방향을 제시하였다. A method of more realistically predicting radionuclide concentrations in crop plants varying with time after a nuclear accident was established to estimate 50 years' concentrations of ^90Sr and ^137Cs in polished rice seeds and Chinese cabbage for unit dry deposition. After non-growing season accidents, concentrations of both nuclides decreased gradually with time and ^90Sr concentrations were higher than those of ^137Cs throughout the whole period. Radionuclide concentrations in the 1st year after growing season accidents were on the whole higher than those after non-growing season accidents by factors of up to 30 for ^90Sr and up to 1,000 for ^137Cs. In polished rice seeds, the 50 years-integrated concentration was higher for ^90Sr than for ^137Cs after non-growing season accidents, whereas the opposite was true after growing season accidents. In Chinese cabbage, however, it was higher for ^90Sr than for ^137Cs after both types of the accident. Generally speaking, the dominant pathway for the integrated concentration after the growing season accident was root uptake for ^90Sr and direct plant contamination for ^137Cs. The effect of resuspension was negligible. Based on the predicted results, the direction of planning countermeasures was suggested for various accident conditions.

국산 체외 충격파 쇄석기의 음향학적 특성 평가

최민주,이종수,김성삼,조성찬,양형석,손종수,천원기 제주대학교 공과대학 첨단기술연구소 2001 尖端技術硏究所論文集 Vol.12 No.2

In the study we measured and evaluated the acoustical property of a domestic spark gap type extracorporeal shock wave lithotripsy (ESWL). Altering the discharging medium between the electrodes of the shock wave generator (water, 1% an 10% NaCl electrolyte), we measured shock waveforms and sound pressure level (SPL). For the shock waves produced using the discharging medium, water, it was seen that the shock wave peak pressure went up to 70 MPa, and the SPL was in the range of 90 - 100 dB. As the concentration of NaCl increased in the electrolyte. the SPL did not change much and was shown to increase correlation with the discharging voltage. In the case of the discharging medium. 10% NaCl electrolyte, it was found that the shock amplitudes varied in a narrow range when being high in the concentration of NaCl and were large when being high in discharging voltages. While the stone fragmentation was in process, we measured the acoustic emission and compared their spectral properties.

수리된 복합레진 수복물의 전단결합강도 연구

최수영,오원만,황인남 전남대학교 치의학연구소 2002 구강과학 Vol.14 No.1

This study was performed to evaluate the interfacial shear bond strength of base (direct and indirect) and repair composites with aging and surface treatment methods. Direct composite resin specimens (Charisma^(r), Heraeus Kulzer, Germany) were aged for 5min, 1hour, 24hour, and 1week in 37℃ distilled water before surface treatment, and then divided into five groups:Group 1, grinding; Group 2, grinding and application of bonding agent;Group 3, grinding, etching with 37% phosphoric acid for 30sec, and application of bonding agent;Group 4, grinding, etching with 37% phosphoric acid for 30sec, silane treatment, and application of bonding agent;Group 5, grinding, etching with 4% hydrofluoric acid for 30sec, silane treatment, and application of bonding agent. Indirect composite resin specimens (Artglass^(r), Heraeus Kulzer, Germany) were aged for 1week in 37℃ distilled water and divided into seven groups:Group 1-Group 5, equal to Charisma specimens;Group 6, grinding, etching with 37% phosphoric acid for 60sec, silane treatment, and application of bonding agent;Group 7, grinding, etching with 4% hydrofluoric acid for 60sec, silane treatment, and application of bonding agent. The repair material(Charisma^(r)) was then added on the center of the surface (5mm in diameter, 5mm in height). The shear bond strength was tested and the data was analyzed using one-way ANOVA and the Student-Newman-Keuls test. The following conclusions were drawn. 1. The shear bond strength of Charisma^(r) specimens aged for 1hour was significantly higher in Group 2 and Group 5 than in Group 1 (p<0.05), and that of Charisma^(r) specimens aged for 1week was significantly higher in Group 3 and Group 5 than in Group 1 (p<0.05). No significant difference was found in the bond strength of specimens aged for 5min and 24hours. 2. In Group 2 of the Charisma^(r) specimens, there was significant difference between the bond strength of 24hours and that of 1week (p<0.05). 3. In Group 4 of the Charisma^(r) specimens, the shear bond strength of specimens aged for 24hours was significantly higher than the others(p<0.05). 4. There was no significant difference between the shear bond strength of the Artglass^(r) specimens. 5. Most of the Charisma^(r) specimens showed cohesive fractures. Artglass^(r) specimens that were etched with acid (phosphoric or hydrofluoric) for 30sec showed more cohesive fractures.