중앙은행의 디지털 화폐 발행과 시중은행의 수익성

손재민,류두진 한국경영학회 2022 經營學硏究 Vol.51 No.3

This study analyzes the impact of changes in central bank digital currency (CBDC) issuance and interest rates on commercial bank profitability, considering the interaction of individuals (savers and borrowers), commercial banks, and the government (central bank). We show that the profitability of commercial banks in the deposit sector decreases when interest rates higher than deposit rates are imposed on CBDC or liquidity constraint policies are enforced. On the other hand, if the interest rate on CBDC is lower than the deposit rate, the effect on the profitability of commercial banks is minimal, and the profitability of the loan sector is not affected by the CBDC issuance. We also suggest implications for the method of operating CBDC. If the CBDC is not operated directly by a central bank, but indirectly by commercial banks, the government's costs may decrease and the profits of the commercial banks may increase due to the business connectivity and effects of the economy of scale.

The development of nano-polyplex efficacious against osteoarthropathy

손재민,박영호,이창섭 한국공업화학회 2014 Journal of Industrial and Engineering Chemistry Vol.20 No.4

This study is a manufacturing design to reduce side effects and to increase use rate of organism by inclusion of Alendronate, a kind of bisphosphonate used for treatment and prevention of osteoporosis, into the center of W1/O/W2 multi-emulsions. We have used enteric coating materials insolvent in acid by adding adhesion property of mucous membrane. We have secured enteric nature with Eudragit by using PEO (polyethylene oxide) polymer as adhesion property of mucous membrane and have encapsulated using PVA (polyvinyl alcohol). We have conducted optimum test per phases and it was found out that the best result was achieved when we have used an ideal quantity ratio of Alendronate and PEO in 1:0.1. The quantity of PEO molecule was 300,000 and oily phase was manufactured with the addition of water phase, and L100 Type Eudragit was used for the manufacturing. We have manufactured the optimum multiple-emulsions by adding 1% PVA to this. Multi-emulsions manufactured in this study had a 70% efficiency of encapsulation rate and grain ratio was 800 nm and have shown enteric stability and efficiency.

비만 성인 여성의 토르소 신체 치수 및 체형 분석

손재민,김동은,Sohn, Jae-Min,Kim, Dong-Eun 복식문화학회 2017 服飾文化硏究 Vol.25 No.5

The purpose of this study was to classify the upper torso body types of obese Korean adult women using the 7th Korea National Anthropometric Study data and compare the body type differences according to three age groups: 20s~30s, 40s~50s, and 60s. A total of 548 adult women whose BMI was in the obese range of 25 or higher and whose age ranged from 20s to 60s were selected from the anthropometric database. Twenty-nine body measurements related to torso and arm areas important for torso and sleeve pattern development were chosen. Five drop values by differences between bust, waist, and hip circumferences were also chosen for analysis. The number of obese women increased with age. The results revealed seven factors according to the factor analysis and three obese body types based on the cluster analysis. Body type 1 (47.3% of obese women) was characterized by narrow shoulders, a small or medium torso, and a straight waist. Body type 2 (42.4% of obese women) was characterized by a defined waist and a larger lower torso than upper torso. Body type 3 (10.3% of obese women), the largest obese body type among the three types, was characterized by a large bust, large abdomen area, and long upper torso. Women in their 20s to 30s were most likely to have body type 2, women in their 40s to 50s were evenly distributed between body types 2 and 3, and women in their 60s were most likely to have body type 1.

가로돌기 단독 골절로 진단받은 요통 환자에 대한 한의학적 치료 효과 : 증례 보고

손재민(Jaemin Son),박병학(Byunghak Park),이남우(Namwoo Lee),한정훈(Jeonghun Han),강도현(Dohyeon Kang),민태운(Taewoon Min),안재서(Jaeseo Ahn),이한솔(Hansol Lee),이현준(Hyunjun Lee),지형욱(Hyungwook Ji),조소현(Sohyun Cho),이성민(Seongmin 대한스포츠한의학회 2021 대한스포츠한의학회지 Vol.21 No.1

Objectives Isolated Transverse Process Fracture(ITPF) is a rare traumatic spinal disease that has been fractured in transverse process alone in vertebra. This study reports the effectiveness of Korean medicine treatment in ITPF patient. Methods The patient was treated with acupuncture, pharmacopuncture and herbal medicine for 28 days. EuroQol-5 dimension index(EQ-5D), Numerical rating scale(NRS), Oswestry disability index(ODI), lumbar Range of motion(ROM) were used for assessment. Results After treatment, NRS for low back pain decreased from 5 to 2. EQ-5D improved from 0.215 to 0.76, ODI from 82 to 31.11 and lumbar ROM also improved. Conclusions This case shows that Korean medicine treatment can be considered as effective treatment for ITPF.

성능 해석용 수분투과도 확보를 위한 막 습증기 수송 특성 실험

손재민(Jaemin Son),유상석(Sangseok yu) 한국자동차공학회 2017 한국자동차공학회 부문종합 학술대회 Vol.2017 No.5

나피온 117 전해질 막의 확산 계수 계산 방법에 따른 평가

손재민(Jae Min Son),유상석(Sang Seok Yu) 대한기계학회 2017 대한기계학회 춘추학술대회 Vol.2017 No.11

연구논문 : 퀵서비스 운송업자 모터사이클 재킷 착용실태 조사

손재민 ( Jae Min Sohn ),최혜선 ( Hei Sun Choi ),김은경 ( Eun Kyung Kim ) 한국의류산업학회 2015 한국의류산업학회지 Vol.17 No.2

This study conducted a questionnaire survey on the real condition of clothing with focus on related to general motorcycle wear and motorcycle jacket targeting a quick service carrier affiliated with a quick service business in Seoul. In addition, this study is aimed at providing basic data on developing the motorcycle jacket, whose motional flexibility, safety and functionality are excellent, exclusively for a quick service carrier by grasping inconveniences and problems and deducting improvements on the basis of the questionnaire survey. This study, on the basis of the questionnaire survey results, grasped the general part related to quick service and motorcycle wear, such as their general matters, whether they were having on the motorcycle wear in the middle of doing business, whether it``s necessary to wear the motorcycle wear, where they had a driving accident, and kinds of external injuries, etc. From the gathered results of analysis of the collected questionnaires, the item which got the lowest satisfaction was the inconvenience from the chafed front neck when driving. Besides, the results showed carriers`` complaints like the elbow part felt tight, discomfort in the horizontal movement of the shoulders or back, and wind admission in between zippers. In addition, the respondents showed complaints in the item about hygroscopic property and air permeability at the armpits and back part, and 5 items about material flexibility, wind shielding property, living water repellency, weighty sensation, and night visibility were found to be low in respondents`` satisfaction.

연구논문 : 퀵서비스 운송업자를 위한 기능적 모터사이클 재킷 개발

손재민 ( Jae Min Sohn ),오송윤 ( Song Yun Oh ),김은경 ( Eun Kyong Kim ) 한국의류산업학회 2015 한국의류산업학회지 Vol.17 No.5

This study aims to develop a spring/fall motorcycle jacket for quick service transporter. Depending on the results of the previous research, this study produced the tested jacket which was improved in material, pattern, and design. For the tested jacket, 100% polyester fabric excellent in strength, durability and abrasion-resistance was selected as a major material, and Cordura was used as a partial material to improve the strength and abrasion-resistance of the sleeve side lines, elbow and shoulder areas. The retro-reflection material was applied partially in order to improve visibility of the jacket in the night or in a dark place. A total of 7 pockets were composed in the jacket for the sufficient storage spaces. The functional design elements such as the 2-way zipper and the placket at the center front, the action pleats at the upper part of back armholes, the pit-zip at armpit were applied. In addition, the sleeve pattern was bent with the shape of elbow curvature in time of driving and the back length of the jacket was lengthened 4cm. As a result of the appearance assessment, there was a significant difference from the existing jacket in all items but chest size, shoulder width, cuffs circumference, and jacket hemline circumference. In motion adaptability and field activity appropriateness assessments, the assessment grade for all items was found to be commonly higher than that of the existing jacket, and thus, the tested jacket was assessed to be suitable for a motorcycle jacket design for the quick service transporters.

무선 센서 네트워크에서의 제한된 쿼리 전달 기법

손재민(Jaemin Son),진정우(Jungwoo Jin),한기준(Kijun Han) 전력전자학회 2005 전력전자학술대회 논문집 Vol.- No.-

쿼리에 응답하는 데이터 전달방식에서는 일반적으로 쿼리가 네트워크 전체에 뿌려진다. 하지만 쿼리가 특정지역의 정보만을 요구하는 경우 그 쿼리는 네트워크 전체에 뿌려질 필요가 없다. 본 논문에서 우리는 제한된 쿼리 전달 기법을 제안한다. 제안된 기법은 네트워크를 섹터와 레벨단위의 논리적 영역을 만들고 쿼리가 필요로 하는 정보가 속한 최소한의 영역으로만 쿼리를 전달함으로써 불필요한 쿼리 전달을 줄이고자 하는 것이다. 성능평가에서는 제안된 기법을 사용함으로써 센서 노드들의 평균 소비되는 에너지를 줄이고 네트워크의 생존시간을 늘리는 결과를 보였다.

갯메꽃 추출물과 유기용매 분획물의 암전이 억제 효과

손재민(Jaemin Son),김준세(Junse Kim),김호준(Hojun Kim),서영완(Youngwan Seo) 한국생명과학회 2019 생명과학회지 Vol.29 No.3

갯메꽃은 해안 사구에 분포하며 식물로 높은 환경 적응력을 가지고 있으며 갯메꽃은 항산화, 해열, 살균, 이뇨작용 등에 효과가 있는 것으로 알려져 있다. 본 연구에서는 암전이 과정에서 중요한 역할을 한다고 알려진 matrix metalloproteinases (MMPs)의 일종인 MMP-2와 MMP-9의 활성에 대한 갯메꽃의 억제효과를 methylene chloride (MC) 및 methanol (MeOH) 추출물과 조추출물, 유기용매 분획물을 시료로 하여 인체 섬유육종 HT-1080 세포를 이용하여 ELISA (Enzyme-linked immunosorbent), gelatin zymography, Wound healing assay, RT-PCR, western blot 실험을 통해 조사하였다. 갯메꽃의 MC 및 MeOH 추출물, 조추출물과 4가지 유기용매 분획물이 HT-1080 세포에서 MMP-2와 MMP-9 생성 억제 활성을 나타냄을 확인하였다. 그 중에서도 n-hexane, 85% aq.MeOH 분획물이 전반적으로 MMP-2와 MMP-9에 대한 높은 억제활성을 보였다. 이들 결과로부터 85% aq.MeOH과 n-hexane 분획물에 MMP 억제 활성이 높은 물질이 존재할 것으로 추측되어지며, 갯메꽃 추출물 및 분획물이 암침윤 및 전이를 억제하는 효과적인 항암소재로서의 가능성이 있음을 제시한다. 이에 본 연구팀은 85% aq.MeOH과 n-hexane 분획물에 있는 활성물질을 분리하기 위한 연구를 추가적으로 수행할 계획이다. Calystegia soldanella is distributed in coastal sand dunes and has high environmental adaptability; it is also known to be effective for anti-oxidant, anti-pyretic, anti-septic, and diuretic action. This study investigated the effect of crude extracts and organic solvent fractions of C. soldanella on MMP-2 and MMP-9 expression, MMP activity, and cell mobility in phorbol-12-myristate-13-acetate (PMA)-induced fibrosarcoma HT-1080 cells. C. soldanella was twice extracted, once with methylene chloride (MC) and once with methanol (MeOH). After the MC and MeOH extracts were combined, their suppressive effects on MMP-2 and MMP-9 expression, MMP enzymatic activity, and gene and protein expression were measured by gelatin zymography, enzyme-linked immunosorbent assay, reverse-transcription polymerase chain reaction, and western blot method. Cell mobility for the HT-1080 cells was observed by wound healing assay. The combined crude extracts showed a significant suppressive effects on MMP-2 and MMP-9 expression. To explore active inhibitory elements, the combined extracts were fractionated according to polarity into with n-hexane, 85% aqueous methanol, n-butanol, and water. Across these four solvent fractions, MMP-2 and MMP-9 activity and cell mobility in the HT-1080 cells were all strongly inhibited by the n-hexane fraction. These results suggest that C. soldanella extract and organic solvent fractions could be used as potent MMP inhibitors for effective anti-cancer treatments to suppress cancer invasion and metastasis.