• Journal of the Korea Institute of Building Construction
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• v.23 no.4
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• pp.337-348
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• 2023

The central objective of this study is to curtail the leakage of mortar or cement paste, often resultant of ill-constructed formwork, by implementing thixotropy in the formulation of high-fluidity, standard-strength concrete. When such concrete is utilized in smaller scale construction projects, instances of formwork gaps due to suboptimal construction precision may lead to significant leakage of mortar and paste, a problem not typically encountered with traditional slump-flow concrete. In this investigation, Polyvinyl Alcohol(PVA) and borax are incorporated into the concrete mixture to induce thixotropy. The experimental design includes varying methodologies for integrating PVA and borax, while assessing alterations in diverse concrete performances, including thixotropy and leakage reduction potential that simulates formwork gap conditions. Under the experimental conditions defined within this study, it was found that replacing, rather than merely adding PVA and borax, aids in averting water addition via suspensions. This approach yielded promising results in terms of concrete properties and proved efficacious in stemming leakage in concrete possessing sufficient thixotropy. Notably, when a 6% PVA suspension was substituted, a significant reduction in leakage was observed. Consequently, it is projected that construction quality can be ensured, even with lower precision formwork, by applying thixotropy to concrete through the use of PVA and borax.

• Korean Journal of Health Psychology
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• v.16 no.1
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• pp.169-187
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• 2011

The present study explored psychosocial characteristics of infants with genital anomalies (GA) and their caregivers against normal controls. Participants were female caregivers and infants between the ages of 6to38months diagnosed with hypospadias(HS;n=103) or cryptorchidism (CR;n=49). Normalcontrols(n=131) were recruited and selected via Internet. Caregivers completed measures on parenting stress, coping style, social support, and infant temperament. Within the GAgroups, HScaregivers reported their greatest parental concerns as infant urination/bodily functioning difficulties whereas CRcaregivers reported worries related to surgical anesthesia issues. Both groups reported concern about their children's potential reproductive problems. Per caregiver report, infants with GA had lower ability to self-soothe. HS infants in particular were perceived as exhibiting greater negative emotion. Compared with controls, HS and CRcaregivers overall employed coping strategies more frequently and had lower interpersonal sensitivity and parental distress. However, HScaregivers emerged as experiencing higher stress when compared to the CRgroup. There were no differences in to tal parenting stress and social support scores between groups. Further, CRcaregivers reported lower levels of family discord than controls. Despite temperament-related differences between infants with GA and normal controls, HS and CRcaregivers reported lower parental distress and greater use of coping skills as compared to controls. Clinical implications are discussed.

• Korean Journal of Culture and Social Issue
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• v.9 no.1
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• pp.43-66
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• 2003

This study was to investigate two main purposes; The first was to explore the factors which have an effect on conceding seats to the old or the weak in subway(concessive action). The second was to examine the influence that the psychological burden and the responsibility had on concessive action and it's gender differences. The results of study 1 showed that affective empathy, morality, and negative-state relief were important inductive factors, while 3 factors were revealed as important inhibitory factors for the concessive action; psychological burden, repulsion for coercive demand for conceding seats and vagueness of concession situation. In study 2, We could find the fact that the psychological burden and the responsibility had a main effect on the concessive action. The more participants felt the psychological burden, they were likely to evaluate that the tendency to concessive action would be decreased. And the more participants felt the responsibility, they were inclined to evaluate that concessive action would be increased. Secondly, the interaction effect was also revealed: On the situation that the psychological burden was high and responsibility was low, participants judged that people tended not to concede seats. Finally, We were able to identify gender differences. Specifically, Judging the tendency to concessive action, women were more responsive to the psychological burden than men.

• Clinical and Experimental Pediatrics
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• v.52 no.4
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• pp.464-470
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• 2009

Purpose : This study assessed the incidence and outcome of congenital anomalies of the kidney and urinary tract (CAKUT) detected by prenatal ultrasonography Methods : There were 906 cases of CAKUT detected by prenatal ultrasonography and postnatally confirmed at the Asan Medical Center from October 1989 to October 2007. We investigated the incidence and outcome of these cases by reviewing medical records retrospectively. Results : The order of incidence was hydronephrosis, multicystic dysplastic kidney (MCDK), duplex kidney, vesico-ureteral reflux (VUR), single kidney, hydroureteronephrosis, ectopic kidney, polycystic kidney, ureterocele, and posterior urethral valve (PUV). There were 520 cases (57.4%) of hydronephrosis, and 20% of these needed an operation due to significant obstruction. MCDK was associated with other CAKUT in 25.4% of all cases. Approximately 57.9% of duplex kidney cases needed surgical treatment due to ureterocele and VUR. VUR had a male: female ratio of 10:1. Two out of seven cases of autosomal recessive polycystic kidney had progressed to chronic renal failure. Patients with PUV were relatively uncommon, and one out of nine cases progressed to end-stage renal disease. Conclusion : CAKUTs detected by prenatal ultrasonography were composed of various anomalies, and almost all of them had a good outcome without any intervention. However, in some cases, recurrent urinary tract infection or renal failure occurred, especially in bilateral cases. For further management, a long-term multicenter study is needed to investigate the precise incidence and outcome of each anomaly in the general population.

• Journal of dental hygiene science
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• v.12 no.2
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• pp.131-137
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• 2012

The purpose of this study was to examine the sociopsychological stress of dental hygiene students, any possible gaps among them according to their general characteristics and the most influential factor for their stress. The subjects in this study were the dental hygiene students who were selected by convenience sampling from three different colleges. After a survey was conducted for about a month between March and April, 2011, the answer sheets from 561 students were analyzed. As for the sociopsychological stress of the dental hygiene students, economic stress was the heaviest sociopsychological stress that the students suffered(3.17). Regarding differences in each stressor according to general characteristics, they were more stressed out about their economy, families, interpersonal relationships and studies when they had a less conversation with their families. And they had more stress about their economy, families, interpersonal relationships and studies when they found themselves to be more unhealthy. The gaps between them and the others were statistically significant. As a result of analyzing the influential factors for their stress, they had more stress when they had a less conversation with their families(p<0.001) and when they found themselves not to be in good health(p<0.001). It's required to seek ways for dental hygiene students to cope with their stress properly, and the development of stress management programs is necessary. Besides, education and training should be provided for them to regulate their own stress successfully.

• Childhood Kidney Diseases
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• v.11 no.1
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• pp.65-73
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• 2007

Purpose : Voiding cystourethrography(VCUG) is a commonly performed diagnostic procedure in children with urinary tract infections. Recently, with the widespread use of prenatal ultrasonography, VCUG is performed as part of the postnatal radiological evaluation of asymptomatic infants with prenatally detected hydronephrosis. The procedure is relatively simple but it involves discomfort and some complications. We studied post procedural symptoms and complications in children who underwent VCUG. Methods : This study reviewed 259 patients who underwent VCUG in our hospital between October 2005 and September 2006. We did a chart review and a telephone interview with the patients' parents about symptoms and complications associated with VCUG. Results : Among 269 children, 217 patients(80.7%) were under 2 years of age and 5 patients (1.9%) were over 8 years of age. Their mean age was $13.1{\pm}22.9$ months. After VCUG, dysuria was found in 49 patients presented with dysuria, and irritability in 36 patients with irritability. Other complications were hematuria, fever, frequency, bladder rupture and urinary tract infection. Mean symptoms duration was $1.4{\pm}0.7$ days. There was no significant relationship between prophylactic antibiotics use and complication rate associated with VCUG. Conclusion : Our study demonstrated that 32.7% of patients showed complications including bladder rupture and urinary tract infection after VCUG. We also found that prophylactic antibiotics use did not prevent urinary tract infection nor decrease the rate of complications associated with VCUG. Therefore, we suggest that the procedure must be done carefully and aseptically, and we should closely observe the children who undergo VCUG for development of possible complications.

• Investigative Magnetic Resonance Imaging
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• v.3 no.1
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• pp.28-40
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• 1999

MRI는 주로 부인과 질환의 진단에 이용되어 왔으나 뛰어난 연조직 대조도와 다면 영상 능력으로 남성 골반강의 평가에서도 그 활용이 점차 확대되고 있다. 남성 골반강 MRI는 전립선을 중심으로 발전되어 왔으나 음경과 음낭, 요도 등을 침범한 외상, 종양 등의 질환에 매우 유용하므로 이들 부위에서의 MRI 이용이 더욱 증가할 것으로 보인다. 여기서는 전립선, 음경, 음낭 등의 남성 골반강 장기를 평가하는데 필요한 검사기법, 정상 해부학, 이상 질환의 MRI 소견 등에 대해 기술하고자 한다.

• 보건세계
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• v.43 no.2 s.474
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• pp.12-15
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• 1996

1946년 6월 1일 미군정하에서 문을 연 국립마산요양원은 반세기 동안 국립마산결핵요양소, 국립중앙결핵요양소, 마산결핵요양소, 국립마산병원, 국립마산결핵병원으로 명칭이 바뀌면서 우리나라 결핵치료의 중심적 지위를 확고하게 지켜왔으며 흉곽성형술(胸廓成形術)과 폐절제술을 처음으로 실시하여 흉부외과 개척의 길을 열기도 했다. 또한 1951년 우리나라에서 최초로 결핵약제 내성검사법을 연구 개발하여 화학요법 발전에 새 정기를 마련했다.

• Proceedings of the Korean Institute of Industrial Safety Conference
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• 2003.05a
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• pp.545-550
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• 2003

교통사고의 요인은 크게 운전자 요인, 도로환경 요인, 차량 요인으로 구분 할 수 있다. 운전자의 안전의식미비, 심리상태, 피로 등 운전자 요인과 차량의 고장, 정비상태 불량 등 차량요인은 운수업체의 경영과 직ㆍ간접적인 관계가 있으므로 사고예방을 위한 경영자의 안전의식이 교통사고에 영향을 끼친다는 것은 분명한 사실이다.(중략)

• The Magazine for Energy Service Companies
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• s.77
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• pp.28-39
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• 2012

산업체 에너지소비량은 전체 에너지소비량의 60%에 육박하고, 이들 산업체 대부분의 업종에서 '요' 및 '로'를 사용하여 제품을 생산한다. '요' 및 '로'는 열에너지 사용량이 매우 많은 설비일 뿐 아니라 대부분의 경우 송풍기와 같은 전기에너지와의 상호 연계성이 높아 이에 대한 개선을 통해 열에너지와 전기에너지를 동시에 절감할 수 있다.