$Na_2SO_4$가 시멘트-플라이애쉬 페이스트 및 콘크리트 강도에 미치는 영향

이진용,배성용,송종택,Lee, Chin-Yong,Bae, Sung-Yong,Song, Jong-Taek 한국콘크리트학회 1999 콘크리트학회지 Vol.11 No.2

플라이애쉬 대체량에 따른 변화, 양생방법이 미치는 영향 그리고 조기강도를 높이기 위해 첨가된 화학 혼화제가 시멘트-플라이애쉬 페이스트의 특징 및 콘크리트 강도에 미치는 영향을 알아보았다. 시멘트-플라이애쉬 페이스트의 압축강도는 시멘트로만 만들어진 페이스트보다 낮았으며, 플라이애쉬의 대체량이 증가할수록 강도차이가 증가하였다. 그러나 증기양생시 시멘트-플라이애쉬 페이스트는 수중양생시보다 압축강도가 증가하였으며, 특히 조기강도가 크게 향상되었다. 조기강도 증진을 목적으로 혼입한 활성화제($Na_2SO_4$)의 첨가는 시멘트-플라이애쉬 페이스트 조기강도를 증진시켰으며, 또한 $Na_2SO_4$와 플라이애쉬를 30% 함유한 플라이애쉬 콘크리트의 강도도 월등히 향상되었다. It was investigated to evaluate the characteristics of cement-flyash paste which was affected the replacement level, curing method and chemical admixtures. The strength of cement-flyash paste was lower than that of cement paste only and the differences increased with increasing the replacement level. However, in steam curing, the strength of cement-flyash pastes was improved and specially, the early strength was effectively increased. The inclusion of $Na_2SO_4$ increased the early strength of cement-flyash paste. In addition, the strength of concrete including 30% of fly ash and $Na_2SO_4$ has improved and obtained the highest strength compared to other concrete mixes.

Evidence of a Broken Healthcare Delivery System in Korea: Unnecessary Hospital Outpatient Utilization among Patients with a Single Chronic Disease Without Complications

이진용,조민우,유원섭,김현주,은상준 대한의학회 2014 Journal of Korean medical science Vol.12 No.12

This study aims to estimate the volume of unnecessarily utilized hospital outpatient servicesin Korea and quantify the total cost resulting from the inappropriate utilization. Theanalysis included a sample of 27,320,505 outpatient claims from the 2009 NationalInpatient Sample database. Using the Charlson Comorbidity Index (CCI), patients wereconsidered to have received ‘unnecessary hospital outpatient utilization’ if they had a CCIscore of 0 and were concurrently admitted to hospital for treatment of a single chronicdisease – hypertension (HTN), diabetes mellitus (DM), or hyperlipidemia (HL) – withoutcomplication. Overall, 85% of patients received unnecessary hospital services. Alsohospitals were taking away 18.7% of HTN patients, 18.6% of DM and 31.6% of HL fromclinics. Healthcare expenditures from unnecessary hospital outpatient utilization wereestimated at: HTN (94,058 thousands USD, 38.6% of total expenditure); DM (17,795thousands USD, 40.6%) and HL (62,876 thousands USD, 49.1%). If 100% of patients whoreceived unnecessary hospital outpatient services were redirected to clinics, the estimatedsavings would be 104,226 thousands USD. This research proves that approximately 85% ofhospital outpatient utilizations are unnecessary and that a significant amount of money iswasted on unnecessary healthcare services; thus burdening the National Health InsuranceService (NHIS) and patients.

곽향정기산가미방(藿香正氣散加味方)이 고지방식이(高脂肪食餌)로 유식(誘導)된 흰쥐의 체지방에 미치는 영향(影響)

이진용,이훈,Lee, Jin-Yong,Lee, Hoon 대한한방소아과학회 2007 대한한방소아과학회지 Vol.21 No.2

Objetives This experimental study is designed to investigate the effects of kwakhyangjungkisangamibang extract on the changes of adipose tissues, serum insulin and leptin levels in rats induced by a high fat diet. The leptin has been proposed to be involved in the role of food intake and energy expenditure. Methods During the 8 weeks of experimental period, male Sprague-Dawley rats were fed on the 2 different diets: the normal diet AIN-76A and high fat(beef tallow) diet ad libitum, of which 40% of the calories intake was fat. 9 rats in the control and high fat diet group were killed for the baseline experiment at 4 weeks of age. The high fat diet group was divided into three groups: control group, experimental group I(high fat diet plus kwakhyangjungkisangamibang extract), and experimental group II(high fat diet plus mahuang). The body weight, hypodermal fat tissue, serum lipid profile, insulin and leptin levels were measured after the administration of the high fat diet and extract. Results 1. The body weight was decreased in experimental group II, but there was not a significance difference compared to the control group. 2. The peritoneal, visceral, and hypodermal adipose tissue was decreased in experimental group I, but there was not a significance difference compared to the control group. 3. The lipid profile was decreased in experimental group I, but not in group II. 4. The insulin concentration was increased in experimental group I and II, but there was not a significance difference compared to the control group. 5. The leptin level was increased significantly in experimental group I(p<0.05) and II(p<0.01) compared to the control group. Conclusion The results of this study indicate that kwakhyangjungkisangamibang has an effect on the regulation of obesity.

제 71 차 춘계학술대회 : 초록보고 ; 다낭성난소질환 환자에서 GnRH agonist ( D-Trp6-LHRH : Decapepty 1 ) 와 외인성 성성자극호르몬을 이용한 배란유도에 관한 연구

이진용,김정훈,신창재,김정구,문신용,장윤석 대한산부인과학회 1993 춘계학술대회 Vol.- No.-

펄스자기장 자극이 말초혈관에서 혈류량에 미치는 영향

이진용,고인숙,김선욱,최상대,황도근,신상훈 한국자기학회 2010 한국자기학회 학술연구발표회 논문개요집 Vol.2010 No.6

등속도 캠을 이용한 무맥동정량펌프

이진용 한국유체기계학회 2006 유체기계 연구개발 발표회 논문집 Vol.- No.-

개인의 정치성향이 친사회적 행동에 미치는 영향 - 메시지프레이밍과 심리적 거리를 중심으로

이진용,이유나,정윤재 한국소비자·광고심리학회 2015 한국심리학회지 소비자·광고 Vol.16 No.3

This research examines how political ideology affects prosocial behavior. Especially. we focus on the interaction of political ideology and message framing, and also the interplay of political ideology and perceived psychological distance on target recipients. This study has a 2 (political ideology: liberal vs. conservative) x 2 (message framing: gain vs. loss) x 2 (psychological distance: near vs. far) design, Both the amounts willing to donate (study 1) and the amounts willing to invest (study 2) point out that the liberals are more sensitive to gain whereas the conservatives are more sensitive to loss. The interaction effect of political ideology and psychological distance is also significant. Whereas liberals intend to help (or invest for) the psychologically near and distant target groups equivalently, conservatives are more likely to donate to (or invest for) the psychologically near group than the psychologically distant group. This article concludes by discussing the theoretical implications of our findings for political ideology, message framing, and psychological distance and by suggesting practical implications. 본 연구는 개인의 정치성향이 친사회적 행동에 미치는 영향을 메시지프레이밍과 대상과의 심리적 거리를 중심으로 살펴보고자 하였다. 친사회적 행동 영역을 개인영역인 기부활동과 사회적 시스템 구축에 대한 의사결정으로 구분하여 총 두 번의 실험을 실시하였다. 실험 1은 개인영역의 대표적인 친사회적 행동인 기부영역에서 개인의 정치성향, 메시지프레이밍(이득 혹은 손실), 기부자-수혜자간 심리적 거리(국내 혹은 국외 수혜자)에 따른 결식아동에 대한 기부금액 차이를 살펴보았다. 실험결과, 개인 정치성향과 메시지프레이밍 상호작용 효과가 나타났다. 구체적으로 진보성향 사람들은 이득메시지가 제시되었을 때 손실메시지가 제시될 때에 비하여 기부금액이 더 높게 나타났다. 이와 반대로 보수성향 사람들은 이득메시지에 비하여 손실메시지가 제시될 때 기부금액이 더 높게 나타났다. 정치성향과 기부자-수혜자간 심리적 거리에 따른 상호작용이 나타났다. 진보성향 사람들은 심리적 거리감에 따른 기부금액 차이가 나타나지 않아 국내 및 국외 수혜자에 대하여 비슷한 수준의 기부의향을 보였으나, 보수성향 사람들은 심리적 거리가 가까운 국내결식아동에 대해 심리적 거리가 먼 국외결식아동에 비하여 기부금액을 더 많이 후원하겠다고 하였다. 실험 2에서는 친사회적 시스템 구축 의사결정에 있어 개인의 정치성향, 메시지프레이밍, 수혜자와의 심리적 거리를 중심으로 살펴보았다. 연구결과 진보성향의 사람들은 이득메시지가 제시될 때, 보수성향의 사람들은 손실메시지가 제시되었을 때 사회적 시스템 구축에 대한 투자의향 금액이 더 높게 나타났다. 또한 실험 1과 동일하게 진보성향의 사람들은 국내 혹은 국외 친사회적 시스템 구축에 대한 투자의향 금액 차이가 나타나지 않았다. 이에 반해 보수성향의 사람들은 국내 친사회적 시스템 구축할 경우 국외 친사회적 시스템 구축에 비하여 투자금액이 더 높게 나타났다. 본 연구는 정치영역에서 주로 다루었던 개인의 정치성향을 공공마케팅 영역에서 살펴보았다는 것에 이론적 시사점이 있다. 실무적으로는 최근 비영리기관에서 다양한 마케팅 활동을 통하여 개인 기부활동을 촉진하고자 노력하는데 이에 대한 효과적인 커뮤니케이션 전략을 제공할 수 있을 것이다.

The Effect of Magnetic Flux Change on Blood Flow and Vascular Aging in the Peripheral Vascular System under Magnetic Stimulus

이진용,이현숙,김성현,Taesun Jang,황도근,김선욱 한국물리학회 2011 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.59 No.3

The change in the blood flow and improvement of vascular aging in the peripheral vascular system under strong pulsed magnetic fields using three differently shaped coils (elliptic spiral, circular solenoid, and elliptic solenoid) were analyzed by the photoplethysmograms (PPG). The magnetic stimulation was performed on the hand with the maximum field intensities of approximately 0.4 T and transition times varying from 0.074 to 0.138 ms, generated from three different coils. The changes of blood perfusion under strong magnetic field were analyzed using the volume of blood flow integrated from PPG and the aging index calculated from the second derivative PPG (SDPPG) signal. Although the changes in volume of blood flow do not show any difference during stimulation of 5 min. using three different coil types, the aging index, which is referred the vascular aging, calculated from PPG measured from the middle finger was distinctly decreased after stimulation of 3 min. for elliptic spiral and circular solenoid coils. These two coils have high magnetic flux changes, dB/dt of 4.70 and 5.68 × 10^3 T/s, whereas that of elliptic solenoid is 2.90 × 10^3 T/s. In addition, after 5 min. stimulus, retrieving aging index was observed. We found that high magnetic flux change, dB/dt, is a key role to improve vascular aging in peripheral vascular by stimulating with pulsed magnetic field.

과배란 유도 월경주기중 난포액내 Androstendione 및 Testosterone 농도에 관한 연구

이진용,윤보현,김정구,문신용,장윤석,Lee, Jin-Yong,Yoon, Bo-Hyun,Kim, Jung-Goo,Moon, Shin-Yong,Chang, Yoon-Seok 대한생식의학회 1986 Clinical and Experimental Reproductive Medicine Vol.13 No.1

Follicular flxid (FF) and their matched oocytes were obtained from 58 follicles of 27 women who underwent an in vitro fertilization (IVF) procedure with ovarian hyperstimulation by clomiphene citrate(n=8), hMG(n=9),FSH/hMG(n=10). Follicular aspiration was performed 36 hours after human chorionic gonadotropin administration. The concentcation of androstendione (ADD), testosterone (T) was correlated with hyperstimulation regimens, the morphology of the oocyte-corona-cumulus complex (OCCC), oocyte fertilization, and the incidence of pregnancy after embryo transfer. The results were as follows. 1. According to hyperstimulation regimens, there was no significant differance in FF ADD and T concentrations of the similar morphology of OCCC. 2. In clomiphene-treated and FSH/hMG-treated cycles, FF ADD concentrations of preovulatory oocytes were 43.09${\pm}$9.53 ng/ml and 59.46${\pm}$9.09 ng/ml, those of immature occytes were 96.98${\pm}$16.55 ng/ml and 116.13${\pm}$36.81 ng/ml, those of atretic oocytes were 246.5 ${\pm}$9.25 ng/ml and 634.25${\pm}$9.25 ng/ml respectively, reflecting the significant relationship between FF ADD level and morphologic maturity of OCCC (p<0.05). But in hMG-treated cycles, such relationship was not found (p>0.1). In clomiphene-treated and FSH/hMG-treated cycles, FF T concentrations of preovulatory oocytes were 11.37${\pm}$2.38 ng/ml and 11.68${\pm}$1.73 ng/ml respectively which were significantly lower than those of atretic oocytes (25.1${\pm}$7.50 ng/ml and 23.25${\pm}$0.95 ng/ml respectively) (p<0.05). But in all cycles, FF T concentrations of immature oocytes were not significantly different from those of preovulatory oocytes, artetic oocytes (p>0.1). 3. In hMG-treated and FSH/hMG-treated cycles, FF ADD concentrations of fertilized oocytes were 32.43${\pm}$4.09 ng/ml and 42.61${\pm}$4.82 ng/ml respectively which were significantly lower than those of non-fertilized oocytes (72.18${\pm}$17.31 ng/ml and 108.09${\pm}$17.32 ng/ml respectively) (p<0.05), but in clomiphene-treated cycles there was no significant difference (p>0.1). In FSH/hMG-treated cycles, FF T concentration of fertilized oocytes was 7.33${\pm}$1.06 ng/ml which was significantly lower than that of non-fertilized oocytes (20.3${\pm}$6.21 ng/ml) (p>0.02), but in clomiphne-treated and hMG-treated cycles there was no significant difference (p>0.1). 4. In all cycles FF ADD and T concentrations did not correlated with the success of pregnancy after embryo transfer. Above results suggested that FF ADD and T may play an important role in oocyte maturation and fertilization, but their relationship with the success of psegnancy was not found.

체외수정시술의 현황과 미래

이진용,Lee, Jin-Yong 대한생식의학회 1990 Clinical and Experimental Reproductive Medicine Vol.17 No.1