연마 다듬질 가공면의 표면 미세형상 평가에 관한 연구

조남규,김현국,권기환,한창수,안유민,이성환,박균명 한국공작기계학회 2000 한국공작기계학회 추계학술대회논문집 Vol.2000 No.-

This paper describes the statistical analysis techniques for the surface roughness assessment of polished surfaces. In experiments, the polishing process of the sample surfaces which are manufactured by ball end mill is consist of two steps; the cusp removal process and the surface finishing process. For the cusp removal process, the criterion of cusp removal was established from the power spectrum analysis to assess the change of the cusp removal rate. For the finishing process, the surface was polished by the rotational CBN tool and vibration wood tool. And the surface quality of polished surface was assessed using the functional parameters based on the statistical values of surface profiles. Consequently, the surface finish performance of the polished surface using the vibration wood tool was improved.

실물과 사진제시에 의한 화색과 식물형태의 비교 : focusing on the students of mental ratardation 정신지체학생을 대상으로

안기완,백지성,김은일,조희두,서성철,오찬교 韓國植物ㆍ人間ㆍ環境學會 1999 인간식물환경학회지 Vol.2 No.4

This study was carried out to verify the differences in preference of flower colors by displaying flowered plants and their photos to mentally retarded students. As a result, normal students showed consistent preference against both the objects. But mentally retarded students had a different preference for flowered plants and their photos.

同位元素를 利用한 濟州地域 水資源에 關한 硏究 (第1報)

安鍾成,柳基中,박양문,정창조,柳長杰 제주대학교 방사능이용연구소 1985 연구보고 Vol.1 No.-

濟州市地域의 地下水 資源保護 및 開發을 위하여 1983年度 4, 5, 6月에 海水 3개地域, 湧泉水 3개地點, 地下水 10개地點에서 물試料를 採取하여 陽이온 및 陰이온 그리고 tritium과 deuterium含量을 分析하여 地下水의 水質 및 海水의 地下水로의 浸透如否를 調査하였다. 濟州市 中西部地域 地下水는 tritium含量이 20TU. deuterium이 -46 per mill인 NaHCO₃型 深層地下水이고, 濟州市 南部地域의 湧泉水와 地下水는 tritium含量이 15TU, deuterium이 -39 per mill인 CaHCO₃型 火山性 淺層地下水로서 降水의 영향을 비교적 많이 받는 것으로 나타났다. 濟州市 海岸地域의 地下水는 시기(5, 6月)에 따라서 NaCl型이 된것도 있으나 tritium 및 deuterium水準으로 보다 그 原因은 海水의 浸透現象이 아닌 都市下水에 의한 것으로 추정된다. 龍頭岩 근처의 海水의 水質은 湧泉水에 의하여 영향을 많이 받고 있었다. The investigation was carried out by analyzing water types and measuring the environmental isotopes(tritium and deuterium) for development of water resources and protection of ground waters from sea water intrusion. The water samples were taken monthly from April to June. 1983 from sixteen sites in the Cheju metropolitan area; three seas, three springs, and ten ground waters. The ground water in the midwest area of the city contained 20 TU of tritium and -46 per mill of deuterium, classified as the NaHCO₃type of ground water, generally deep seated. The spring water and ground water in the southern part of the city contained 15 TU of tritium and -39 per mill of deuterium, and appeared to be the CaHCO₃type of shallow ground water, easily affected by precipitation. The results of tritium and deuterium analyses showed that the ground waters in the coastal area were not affected by sea water intrusion, although they changed from NaHCO₃or CaHCO₃type to NaCl type in May and June. It is condluded that the high Na and Cl content in those ground waters might come from municipal sewage. The sea water in the Yong-duam area was influenced by spring water.

제주도 성산항내 부틸주석화합물의 분포와 생물체에 미치는 영향

감상규,안이선,고병철,조은일,이기호 한국환경과학회 2000 한국환경과학회지 Vol.9 No.4

Butyltin compounds (BTs) in seawater, sediments and organisms (Thais clavigera, Liolophura japonica and Cellana nigrolineata), were quantitatively determined to evaluate their distribution inside Songsan Harbor of Cheju Island. In addition, imposex in T. clavigera was used to assess the effect on organisms of BTs. Analysis of the samples collected in seawater, sediments (March, June and August) and organisms (May, July and August) in 1998, confirmed the contamination of BTs in the aquatic environment inside Songsan Harbor. The main BTs species in seawater and sediments was monobutyltin (MBT), tributyltin (TBT), respectively, irrespective of survey time. In organisms, TBT and dibutyltin (DBT) were detected in similar concentrations for T. clavigera and L. japonica, but for C. nigrolineata, DBT concentration was the highest. TBT, the most toxic to aquatic organisms among BTs, was found at concentrations which were sufficient to have a serious effect on the sensitive organisms upon chronic exposure. The relatively high correlations (r>0.83) between BTs indicated that DBT and MBT were mainly degraded from TBT based on antifouling paint and their sources were negligible. The sedimentary organic matters did not have influence on the distribution of BTs in marine environment, and lipid content in T. clavigera did not show a correlation with TBT concentrations. The rate of occurrence of imposex in T. clavigera was 100 %, and the relative penis length index (RPLI) and the relative penis size index (RPSI) which represent the degree of imposex were 79.7%, 58.1%, respectively. Measurement of imposex in T. clavigera was expected to be a very helpful tool for preliminary survey of BTs prior to trace analysis of BTs.

아므르불가사리 (Asterias amurensis)의 배우자를 이용한 남해해역 연안해수의 생물학적 수질평가

유춘만,박지인,조기안,주현수,박종천,나명석 한국환경과학회 1999 한국환경과학회지 Vol.8 No.1

This study was carried out to evaluate off-shore water quality and to draw marine pollution map to Southern sea in Korea by bioassay using gametes and early development system of Asterias amurensis. From the bioassay, it was determined that the water qualites of Southern sea maintained the grade Ⅱ, because development of A. amurensis were moderately inhibited. However, Sunchon, Kwangyang, and Jinhae Bay belonged to grade Ⅲ, because development of A. amurensis were strongly inhibited. This could be due to the inflows of several river systems and poor water circulation. The water quality at Yosu island was the grade I, because A. amurensis were not inhibited in its early development.

고위험군의 원발성 전신성 유전분증 1례 보고 및 조혈모세포이식에 대한 문헌고찰

심준,박수정,엄현석,김기영,박은정,강인중,조병식,이안희,한치화 대한조혈모세포이식학회 2001 대한조혈모세포이식학회지 Vol.6 No.2

저자 등은 클론성 형질세포질환과 동반된 젊은 연령의 원발성 전신성 유전분증 환자를 진단하였기에 다발성 골수종과의 감별 진단, 치료 , 예후 및 고용량 항암화학요법과 조혈모세포이식에 관하여 문헌고찰과 함께 보고하는 바이다. Primary systemic amyloidosis (AL) is a rapidly fatal disorder related to plasma cell dyscrasia. Conventional dose of melphalan, which prolongs the duration of survival by about 10 months, does not improve the functions of impaired organs in most cases. The high dose chemotherapy followed by autologous hematopoietic stem cell rescue for AL, in spite of its high treatment-related mortality, is a new approach to achieve high response rate and better survival. We experienced a 35-year old man with AL(involving heart, liver, stomach, kidneys, peripheral nerve, and rectum) who did not respond to the standard schedule of melphalan plus prednisone and had rapidly fatal course with organ failure. Hence, we evaluate its availability by reviewing the recent reports of high dose chemotherapy in AL.

Mycelium and Exopolysaccharide Production from Submerged Liquid Fermentation of Pleurotus Sajor-Caju PSC 14 using Waste Vegetable Oil as Carbon Source

( Ki An Cho ),( Ha Young Koh ),( Du Bok Choi ) 조선대학교 공학기술연구원 2015 공학기술논문지 Vol.8 No.4

The object of this research is to study effect of the waste vegetable oil on mycelium and exopolysaccharide production from Pleurotus sajor-caju PSC 14. Among various culture temperatures, the mycelium and exopolysaccharide production were highest at 29°C. However, they decreased over and below 29°C. When waste vegetable oil 2.0g/L was used for 5 days, the maximum mycelium production was obtained. On the other hand, in the case of exopolysaccharide production, it was obtained at waste vegetable oil of 1.0g/L. Among various surfactants, Tween 80 was the best one for effect on the mycelium and exopolysaccharide production from submerged liquid fermentation of Pleurotus sajor-caju PSC 14. Fed batch fermentations were carried out in 20L airlift bioreactor containing 10L working volume. When Tween 80 was used, the maximum mycelium and exopolysaccharide concentration were respectively 5.62 g/L and 0.67g/L after 8 days of culture. The product yield from oil was 0.12g/g consumed carbon source. These results show that Tween 80 can be useful for the mycelium and exopolysaccharide production from submerged liquid fermentation of Pleurotus sajor-caju PSC 14 using waste vegetable oil.

사회복지 종사자들의 조직 다양성 인식과 경험은 어떠한가? : 포용과 배제의 경험을 중심으로

조상미,조정화,안소영,간기현,조연지 이화여자대학교 사회복지연구소 2022 사회복지 실천과 연구 Vol.19 No.2

본 연구는 지역사회복지관의 사회복지 종사자가 인식하는 독특한 다양성 요인과 포용과 배제의 경험을 심층적으로 이해하는 것을 목적으로 한다. 이를 위해 전국의 지역사회복지관 종사자 20인을 대상으로 심층 인터뷰를 실시한 후, 주제별 분석법(Thematic analysis)을 활용하여 분석하였다. 연구 결과, 사회복지 종사자의 다양성 요인은 성별, 세대, 전공, 사회복지사 자격증, 출신지역, 출신학교 등 총 18가지 범주로 도출되었다. 다양성 요인에 근거한 포용과 배제 경험은 총 13가지 범주로 도출되었으며, 조직구성원의 다양성 특성에 따라 포용과 배제의 경험이 달리 나타났다. 특히, 남성 또는 지역민에 속할 경우, 고등교육을 받은 사람, 장기근속자, 사회복지학 전공자, 1급 자격증 소지자 등이 복지관의 주류로 인정받아 조직에 대한 소속감이 높은 것으로 나타났으며, 이들은 복지관의 조직문화에 대해서 긍정적으로 언급하였다. 이와 달리 외집단에 속하는 여성 혹은 지역 외부인, 임산부, 타학문 전공자, 2급 자격증 소지자 및 계약직 종사자는 복지관 내에서 소외감을 느끼거나, 차별과 배제를 경험하는 것으로 나타났다. 이는 조직 내에서 사회범주(인구 통계학적 특징), 정보 범주, 가치가 유사한 사람을 내집단으로, 상이한 사람을 외집단으로 범주화하려는 경향이 있고, 이러한 경향이 조직구성원들의 포용과 배제 인식에 영향을 미침을 보여주는 결과이다. 본 연구의 결과를 바탕으로 지역사회복지관 내 다양성 관리의 중요성, 포용적 조직문화 조성, 인적자원관리 측면에서 다양성 인식 시스템 확립 및 교육 확대, 다양성 특성으로 인한 차별 방지와 공정성 확보를 위한 노력, 다양한 조직 구성원들에게 맞춤형 수퍼비전 제공, 임파워먼트를 통한 조직개발 및 발전, 사회복지조직의 특수성에 근거한 인권 차원에서 의 다양성 존중 조직풍토 조성 등을 제언하였다. The purpose of this study was to identify unique diversity factors in community welfare centers, and to understand inclusion-exclusion perceptions and experiences. For this purpose, in-depth interviews were conducted with 20 social welfare center workers nationwide. These data were analyzed using thematic analysis. As a result of the study, the diversity factors of social welfare workers derived into 18 categories total including gender, generation, and social worker qualification. Diversity experiences were derived into 13 categories total, and the experiences of inclusion and exclusion differed according to the diversity characteristics of organizational members. In particular, in the case of males or local residents, those with higher education, majors in social welfare, and those with first-class qualification were identified as being in the mainstream of the community welfare center, indicating a high sense of belonging to the organization. On the other hand, in the case of majoring in other fields, females, holders of second-class qualification and contract workers felt alienated or experienced discrimination, unfairness, and exclusion within the community welfare center. This shows the tendency to classify similar people as in-groups and different people as out-groups in terms of three types of work group diversity, social category diversity, informational diversity and value diversity. Also, it was found that this tendency influences the perception of inclusion and exclusion of the organizational members. Based on the results of this study, it is suggested the importance of managing diversity in community welfare welfare center be stressed, to create an inclusive organizational culture, to prevent discrimination and exclusion, to secure fairness in the organization, to provide personalized supervision to employees, and to promote organizational development by empowerment.

L(+)-lactic Acid Production in the Culture of Rhizopus Oryzae T 345 using Raw Cassava Meal

( Ki An Cho ),( On You Choi ),( Shi Ru Jia ),( Young Cheol Chang ) 조선대학교 공학기술연구원 2013 공학기술논문지 Vol.6 No.1

This research was to investigate the feasibility of production of L(+)-lactic acid in the culture of Rhizopus oryzae T 345 using raw cassava meal as the energy source; and various environment factors affecting L(+)-lactic acid production and yield were investigated. The lactic acid production was increased with the increment of raw cassava meal by 110 g/L. Although 70 g/L of raw cassava meal gave the highest yield of lactic acid production, it would take a large amount of energy to evaporate water in the down-stream process to relatively the low lactic acid concentration. Therefore, the optimum initial concentration of raw cassava meal was determined to be 90 g/L. Among various nitrogen sources, ammonium sulfate and ammonium hydroxide were best nitrogen sources for effective L (+)-lactic acid production and yield. Among different neutralization agents, when 5.0 g/L of calcium carbonate was added as the neutralizer, the morphology showed the form of a pellet and the highest lactic acid production and yield were obtained, 58.5 g/L and 50.2% after 92 hrs of culture, respectively. These results indicate that raw cassava meal can be useful for the effective production of L (+)-lactic acid in the culture of Rhizopus oryzae T 345.

Effect of Intraoperative Dexmedetomidine Infusion on Postoperative Bowel Movements in Patients Undergoing Laparoscopic Gastrectomy : A Prospective, Randomized, Placebo-Controlled Study

Cho, Jin Sun,Kim, Hyoung-Il,Lee, Ki-Young,An, Ji Yeong,Bai, Sun Joon,Cho, Ju Yeon,Yoo, Young Chul Williams & Wilkins Co 2015 Medicine Vol.94 No.24

<P><B>Abstract</B></P><P>Sympathetic hyperactivation is one of the causes of postoperative ileus, which occurs frequently after abdominal surgery and adversely influences the patient's prognosis. We aimed to investigate whether dexmedetomidine (DEX) could attenuate postoperative ileus in patients undergoing laparoscopic gastrectomy.</P><P>Ninety-two patients were randomized to the control (n = 46) or DEX group (n = 46). DEX was administered at a loading dose of 0.5 μg/kg for 10 minutes, followed by an infusion rate of 0.4 μg/kg/h from insufflation of the pneumoperitoneum to the end of surgery. The primary goal was to compare postoperative bowel movements by evaluating the time to first flatus. The balance of the autonomic nervous system, duration of postoperative hospital stay, and pain scores were assessed.</P><P>The time to first flatus was shorter in the DEX group compared with the control group (67.2 ± 16.8 hours vs 79.9 ± 15.9 hours, <I>P</I> < 0.001). The low-frequency/high-frequency power ratio during pneumoperitoneum increased in the control group, compared with baseline values and the DEX group. The length of postoperative hospital stay was shorter in the DEX group compared with the control group (5.4 ± 0.7 days vs 5.8 ± 1.1 days, <I>P</I> = 0.04). Patients in the DEX group had lower pain scores and required fewer analgesics at 1 hour postoperatively.</P><P>DEX facilitated bowel movements and reduced the length of hospital stay in patients undergoing laparoscopic gastrectomy. This may be attributed to the sympatholytic and opioid-sparing effects of DEX.</P>