• Journal of the Speleological Society of Korea
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• no.75
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• pp.15-20
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• 2006

The purpose of this study is to clarify the fault structures in the Chukaryong Rift Valley. The Rift Valley has very significant meaning to interprete the development of Korean structural landforms. But till now the mechanism and processes of the formation of the Rift Valley are not clearly proved IMAGEM is very useful in this study. IMAGEM is developed by the Electromagnetic Instrument, Inc. and it covers $0.001{\sim}20,000Hz$. Form the fold survey data, it is certain that the faulted structures exist in the two points of the Rift Valley. But the Rift Valley is too long and braod to check the all evidences of the faulted structures.

• Journal of Radiation Protection and Research
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• v.44 no.3
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• pp.110-117
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• 2019

Background: This study aimed to estimate occupational doses and patient peak skin doses (PSDs) during interventional radiology procedures. Materials and Methods: We examined data from brain embolization (n = 30), hepatic chemoembolization (n = 50), and uterine embolization (n = 12). The PSDs were measured using radiochromic film around the patient's head (group 1) or abdominal/pelvic region (group 2). Acquisition technical data and kerma-area products (KAP) were also recorded. Occupational doses were measured using $Instadose^{TM}$ dosimeters near the left eye region (LER), chest, and left ankle. Results and Discussion: The third quartile (median) KAP values were $408.1(235.3)Gy{\cdot}cm^2$ for group 1 and $584.4(449.4)Gy{\cdot}cm^2$ for group 2. The average PSDs were greatest during vascular procedures, reaching 1,004.4 (786.4) mGy, and the highest PSD was 2,352.6 mGy (during hepatic chemoembolization). The third quartile (median) occupational doses were 0.35 (0.21) mSv at the LER, 0.25 (0.15) mSv at the chest, and 1.47 (0.64) mSv at the left ankle. Occupational doses at the LER were higher than at the chest, which highlights the importance of protective glasses and suspended shields. The occupational doses at the ankle region were also high, which highlights the importance of using a lead-lined curtain attached to the table. Conclusion: The results indicate that physicians can reach, for eye region, the weekly occupational dose limit after around 15 procedures, even when using proper protection. The average PSD values were below the threshold for tissue reactions, although the complexity of these procedures emphasises the importance of considering related risks.

• Journal of the Speleological Society of Korea
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• no.80
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• pp.1-4
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• 2007

The purpose of this study is to clarify the geomorphological characteristics of middle part of Korea. The purpose of this study is to clarify the fault structures in the Chukaryong Rift Valley. The Rift Valley has very significant meaning to interprete the development of Korean structural landforms. But till now the mechanism and processes of the formation of the Rift Valley are not clearly proved IMAGEM is very useful in this study. IMAGEM is developed by the Electromagnetic Instrument, Inc. and it covers $0.001{\sim}20,000Hz.$ Form the field survey data, it is certain that the faulted structures exist in the two points of the Rift Valley. But the Rift Valley is too long and braod to check the an evidences of the faulted structures.

• Proceedings of the Korea Contents Association Conference
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• 2019.05a
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• pp.361-362
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• 2019

본 연구는 간호대학생의 간호사이미지, 자아탄력성 및 간호전문직관의 관계를 알아보고 간호전문직관에 미치는 영향요인을 파악하고자 시도된 서술적 조사연구이다. 본 연구대상자는 일 지역 4년제 간호대학생을 280명을 대상으로 하였다. 자료분석은 SPSS/WIN 22.0 프로그램을 이용하여 평균, 표준편차, t-test, ANOVA, $Scheff{\acute{e}}^{\prime}s$ test, Pearson's Correlation Coefficients, multiple regressions을 하였다. 연구결과 대상자의 일반적 특성에 따른 간호사이미지는 성격과 간호직에 대한 생각에서 유의한 차이가 있었으며, 자아탄력성은 연령, 성별, 학년, 성격, 간호직에 대한 생각, 지원동기, 입원경험, 가족 중 간호사 유무에서 유의한 차이가 있었다. 간호전문직관은 학년, 성격, 간호직에 대한 생각, 가족 중 간호사 유무에서 유의한 차이가 있었다. 간호사이미지, 자아탄력성 및 간호전문직관의 관계를 분석한 결과 간호전문직관은 간호사이미지, 자아탄력성과 유의하게 정적인 상관관계가 있었고, 간호사이미지와 자아탄력성도 유의하게 정적 상관관계로 나타났다. 간호전문직관 영향요인은 간호사이미지, 자아탄력성으로 나타났다.

• Imaging Science in Dentistry
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• v.52 no.3
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• pp.267-273
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• 2022

Purpose: The aim of this study was to assess the influence of kilovoltage- peak (kVp) and the metal artifact reduction (MAR) tool on the detection of buccal and lingual peri-implant dehiscence in the presence of titanium-zirconia (Ti-Zr) and zirconia (Zr) implants in cone-beam computed tomography (CBCT) images. Materials and Methods: Twenty implant sites were created in the posterior region of human mandibles, including control sites (without dehiscence) and experimental sites (with dehiscence). Individually, a Ti-Zr or Zr implant was placed in each implant site. CBCT scans were performed using a Picasso Trio device, with variation in the kVp setting (70 or 90 kVp) and whether the MAR tool was used. Three oral radiologists scored the detection of dehiscence using a 5-point scale. The area under the receiver operating characteristic (ROC) curve, sensitivity, and specificity were calculated and compared by multi-way analysis of variance (α=0.05). Results: The kVp, cortical plate involved (buccal or lingual cortices), and MAR did not influence any diagnostic values (P>0.05). The material of the implant did not influence the ROC curve values(P>0.05). In contrast, the sensitivity and specificity were statistically significantly influenced by the implant material (P<0.05) with Zr implants showing higher sensitivity values and lower specificity values than Ti-Zr implants. Conclusion: The detection of peri-implant dehiscence was not influenced by kVp, use of the MAR tool, or the cortical plate. Greater sensitivity and lower specificity were shown for the detection of peri-implant dehiscence in the presence of a Zr implant.