광물질 혼화재를 적용한 콘크리트 포장의 내동해성 평가

박세호,이승태 한국도로학회 2021 한국도로학회논문집 Vol.23 No.6

PURPOSES : In this study, experimental findings regarding the frost resistance of concrete incorporated with mineral admixtures such as fly ash (FA) and ground granulated blast-furnace slag (SG) are presented. METHODS : To evaluate the performance of the abovementioned concretes under repeated freezing and thawing environments, based on the ASTM C 666 standard, the relative dynamic modulus of elasticity and mass ratio measurements are performed regularly. Furthermore, based on the ASTM C 672 standard, the concretes are exposed to 4% CaCl2 and NaCl salt solutions along with repeated 50 cycles of freezing and thawing. Subsequently, the scaling resistance is evaluated based on the scaled-off mass content and visual examination. RESULTS : SG is less effective in enhancing the scaling resistance of concrete compared with FA. However, the concrete incorporated with SG is more resistant to repeated freeze-thaw actions compared with OPC concrete. Meanwhile, compared with OPC concrete, the concrete incorporated with FA indicates a similar performance in terms of scaling resistance and better resistance against repeated freeze-thaw actions. CONCLUSIONS : The frost resistance of concrete depends significantly on the types of mineral admixtures used in concrete. This emphasizes the importance of selecting the appropriate binder to achieve durable concrete pavements in cold climate regions.

서냉 및 급냉 고로슬래그미분말을 활용한 시멘트 콘크리트 포장의 탄산화- 스케일링 복합열화 저항성에 대한 실험적 연구

박세호,이승태,정재홍 한국도로학회 2020 한국도로학회논문집 Vol.22 No.5

PURPOSES : This paper presents the experimental results of tests conducted on concrete produced with air-cooled (AS) and water-cooled (WS) ground blast-furnace slag exposed to multi-deterioration environments of carbonation and scaling. METHODS : Carbonated and uncarbonated concrete specimens were regularly monitored according to the ASTM C 672 standard to evaluate the durability of concrete exposed to both scaling and combined carbonation and scaling conditions. Additionally, mechanical properties, such as compressive strength, flexural strength, and surface electric resistivity, were analyzed. RESULTS : It was found that concrete specimens produced with AS and WS had a beneficial effect on the mechanical properties because of the latent hydraulic properties of the AS and WS mineral admixtures. Moreover, carbonated concrete showed good scaling resistance in comparison to uncarbonated concrete, particularly for concrete produced with AS and WS. CONCLUSIONS : The improved scaling resistance of carbonated concrete showed that AS is a suitable option for binders used in cement concrete pavements subjected to combined carbonation and scaling.

변형된 유리치은 이식술을 이용한 구강-상악동 농루의 치험례

박세호,한지영,Park, Se-Ho,Han, Ji-Young 대한치주과학회 2008 Journal of Periodontal & Implant Science Vol.38 No.1

Purpose: Surgical intervention into the maxillary posterior area can lead to inadvertent communication with the maxillary sinus. Spontaneous healing of 1 to 2 mm openings can occur. However, in patients with larger oro-antral communications and those with a history of sinus disease, surgical closure is often indicated. Materials and Methods: In this case, a modified free gingival graft technique was used. The oro-antral sinus track after extraction was about $2{\times}4\;mm$. But the patient had a history of Caldwell-Luc operation. Immediately after extraction, a modified free gingival graft was used for the closure of oro-antral sinus track. Result: A modified free gingival graft technique was successfully used for the closure of oro-antral sinus track. With this technique, esthetic results including similar colors, textures were achieved. Conclusion: It is thought that this technique is very useful in the closure of oro-antral sinus track.

응급의료센터에 내원한 단일 장골 골절 환자의 진통제 투여에 미치는 인자에 대한 분석

박세호,민문기,류지호,김용인,박맹렬,박용면,염석란,한상균 대한응급의학회 2014 大韓應急醫學會誌 Vol.25 No.4

Purpose: Many patients complain of pain due to fracture inthe emergency department (ED). However, pain managementin these patients has not been performed well. Theobjective of this study is to describe analgesic utilization andassess factors associated with analgesic use in patientswith isolated long-bone fractures during the ED visit. Methods: We retrospectively reviewed electronic medicalrecords of patients presenting to two EDs with an isolatedlong bone fracture from January to December 2012. A totalof 358 patients were enrolled, and sex, age, arrival route,mechanism of injury, fracture type, fracture location, drugused for pain control, arrival time, physician in charge primarycare, and disposition were analyzed. Results: Analgesics were administered to 50% of patientsbetween 20~60 years, whereas 11.3% of patients under 20years old and 38.7% above 60 years old (p<0.01) receivedanalgesics. Better pain control was achieved in females,young adults, patients cared for by emergency medicineresidents, and visits made by emergency medical service orat dawn. Conclusion: The pain control rate of children is lower thanthat of adults in patients with an isolated long bone fracture. Active strategies for pain management are necessary bytriage physicians from this time forward.

'흙'에 넘어지다

박세호 지역농업연구원 2013 씨오쟁이 Vol.16 No.-

수익공유 기반 공급사슬에서 가격과 서비스 수준을 고려한 새로운 계약방법

박세호,이영해,조동원 대한산업공학회 2011 대한산업공학회 추계학술대회논문집 Vol.2011 No.11

본 연구는 공급사슬에 새로운 공급계약방법을 적용하여 공급사슬 전체의 입장에서 이익극대화를 위한 소매업체 및 공급업체들의 상황을 살펴보았다. 공급사슬의 최적화된 성과를 얻기 위해 공급사슬 내 파트너들의 위험과 인센티브를 서로 공유함으로써 공급사슬 전체의 이익을 최적화 시키는 수익공유모델을 채택하게 되었다. 그리고 수익공유에서 발생되는 문제점을 보완하는 수량할인계약을 결합하여 새로운 계약방법을 제시하였다. 이 계약방법을 통하여 공급사슬의 전체 최적화를 달성하면서 동시에 공급사슬의 모든 업체들이 서로 win-win 할 수 있음을 밝혀내었다.

In vivo functional effects of Weissella confusa VP30 exopolysaccharides on loperamide-induced constipation in rats

박세호,이미라,양수영,이주연,이현하,성영제,김보혜,김희준,Hui Jin,Tony V. Johnston,구석모,박명수 한국식품과학회 2022 Food Science and Biotechnology Vol.31 No.13

In this work, the in vivo functionalities of milk fermented with Weissella confusa VP30 (VP30-EPS) and purified exopolysaccharide (pEPS) from the milk fermented with Weissella confusa VP30 were evaluated for their effect on constipation using an experimental constipated rat model. Rats were randomly divided into four groups: (i) control group (PBS administered normal group), (ii) loperamide treated group (constipation group), (iii) constipation with loperamide plus VP30-EPS (1 g/kg), and (iv) constipation with loperamide plus pEPS (0.6 g/kg) groups. Loperamide treatment induced animal constipation and significantly reduced the frequency of defecation, intestinal transit ratio, and water content of feces. However, all four fecal parameters were improved in both the loperamide plus VP30-EPS and pEPS administered groups as compared to the loperamide group. These results suggest that the addition of VP30-EPS potentially improves the functional laxative effects of commercial products. This study suggests the possibility that VP30-EPS can be applied to fermented and/or functional foods to relieve constipation.

Clinicopathological Characteristics of Mucinous Carcinoma of the Breast in Korea: Comparison with Invasive Ductal Carcinoma-Not Otherwise Specified

박세호,구자승,김주희,양우익,박병우,이경식 대한의학회 2010 Journal of Korean medical science Vol.25 No.3

Clinicopathological characteristics and prognostic factors of mucinous carcinoma (MC) were compared with invasive ductal carcinoma-not otherwise specified (IDCNOS). Clinicopathological characteristics and survivals of 104 MC patients were retrospectively reviewed and compared with those of 3,936 IDC-NOS. The median age at diagnosis was 45 yr in MC and 47 yr in IDC-NOS, respectively. The sensitivity of mammography and sonography for pure MC were 76.5% and 94.7%, respectively. MC showed favorable characteristics including less involvement of lymph node,lower stage, more expression of estrogen receptors, less HER-2 overexpression and differentiated grade, and better 10-yr disease-free survival (DFS) and overall survival (OS) (86.1% and 86.3%, respectively) than IDC-NOS (74.7% and 74.9%,respectively). Ten-year DFS of pure and mixed type was 90.2% and 68.8%, respectively. Nodal status and stage were statistically significant factors for survival. MC in Koreans showed similar features to Western populations except for a younger age of onset than in IDC-NOS. Since only pure MC showed better prognosis than IDC-NOS, it is important to differentiate mixed MC from pure MC. Middle-aged Korean women presenting breast symptoms should be examined carefully and evaluated with an appropriate diagnostic work-up because some patients present radiologically benign-like lesions.

유두상 유방암의 임상병리학적 특성 및 예후 인자

박세호,김주희,김석모,박병우,이경식 한국유방암학회 2008 Journal of breast cancer Vol.11 No.2

Purpose: Papillary carcinoma of the breast is a rare disease and accounts for 1~2% of all breast cancers. Because of its rarity, there have been no reports regarding prognostic factors of papillary carcinoma of the breast. The aim of this study was to review the clinicopathological factors and treatment modalities of papillary carcinoma of the breast and to evaluate the relationship between these factors and survival rates. Methods: We retrospectively analyzed 31 patients diagnosed with papillary carcinoma of the breast from January 1986 to December 2005. Results: The mean age of the patients was 53.5 years. The most common symptom was a palpable mass (n = 27). The mean size of a tumor was 3.5 cm and 41.9% of the patients were categorized as T2. Eighteen patients had node negative breast cancer. According to the TNM stage, there were 5, 5, 16 and 2 patients with stage 0, I, II and III disease, respectively. Expression of estrogen receptor and progesterone receptor were positive in 80.8% and 69.2% of the patients, respectively. Twenty-three patients underwent mastectomy and eight patients underwent breast-conserving surgery. Fourteen patients received chemotherapy, 20 patients received hormone therapy, and 10 patients received radiotherapy. The 10-year disease free survival rate and 10-year overall survival rate were 74.9% and 86.1%, respectively. Axillary lymph node negative and an age under 50 years were statistically significant factors in 5-year disease free survival and in 5-year overall survival, respectively. Conclusion: Papillary carcinoma of the breast showed a favorable outcome. Lymph node status and age were statistically significant factors for survival rates. The tumor size and stage had a relation with the survival rate, although the relation was not statistically significant.

수리부속 단종관리 연구

박세호 대한산업공학회 2013 대한산업공학회 추계학술대회논문집 Vol.2013 No.11