북아메리카 사막 지형에 미친 인류의 영향: 피닉스, 애리조나 지역을 사례로

정아라 한국지형학회 2019 한국지형학회지 Vol.26 No.3

Humans have been important driver to reconfigure the terrestrial surface of the Earth by altering its morphology and processes. The effect of human activities on the physical landscape, however, shows substantially uneven geographical patterns. Most of anthrogemorphoogical studies regarding human-induced denudation have focused on areas with a long history of human modifications such as humid landscapes, so the hypothesis is naturally a great human impact on landscapes. The effect of human activities on dryland Earth surfaces are far less commonly studied, although erosion is one of major concerns in arid and semiarid region regarding land and water quality degradation. The urban metropolis of Phoenix, Arizona, USA provides an opportunity to explore the impact of the Anthropocene. The Phoenix metropolitan area rests on classic desert landforms, such as extensive pediments, alluvial fans and sand sheets. Human activities including cattle crazing, wildfire resulting from introduced grass species by human, and recent urbanization processes have impacted these classic desert landforms and altered geomorphic processes. The purpose of this paper, therefore, rests in examining Anthropocene in the geomorphology of the north-central Sonoran Desert. The objectives of this paper are: i) to understand the impact of the Anthropocene on the geomorphological processes and forms through field observations; ii) to quantify the magnitude of human impacts on landscape using a published two-decade long record of erosion dataset and natural background erosion dataset in submitted manuscript at the sprawling edge of the Phoenix metropolitan region; iii) to examine how geomorphic outcome can affect the sustainability of cities through the estimation of sediment yield under the condition of urban sprawl.

A Case of Inflammatory Pseudotumor Cerebri and Nasal Septum

정아라,하영민,강정욱,이건희 대한이비인후과학회 2017 대한이비인후과학회지 두경부외과학 Vol.60 No.2

Inflammatory pseudotumors, which clinically mimic neoplasms, are space-occupying collections of inflammatory cells, histiocytes, and fibroblasts. They are most often found in the orbits and lungs, but rarely in the head and neck region, and hardly ever in the nasal septum. Here we report on a 71-year-old woman with pseudotumor cerebri and an inflammatory pseudotumor of the nasal septum. This case demonstrates that inflammatory pseudotumor can cooccur in the brain and nasal septum. Korean J Otorhinolaryngol-Head Neck Surg 2017;60(2):83-6

The Linear and Branched Alkyl Side Chains on Planar Semiconducting Molecules

정아라,옥주원,김봉수 한국고분자학회 2015 한국고분자학회 학술대회 연구논문 초록집 Vol.2015 No.10

The effect of plasma surface treatment on osseointegration of dental implant

정아라,김서영,전현정,임도형,임유봉,권보미 대한기계학회 2021 대한기계학회 춘추학술대회 Vol.2021 No.4

According to recent reports, surface wettability is known to impact on osseointegration of implants. It was shown that adhesion of osteoblast can be improved by modifying the surface to be hydrophilic. To increase the hydrophilicity, we utilized a cylindrical type capacitively coupled plasma (CCP) designed to fit the dental implant shape. Our CCP source was operated under a moderate vacuum condition of 3 torr for stable and uniform plasma discharge. To investigate the efficiency of osseointegration following plasma treatment, we evaluated protein adsorption, cell adhesion, and differentiation on plasma treated dental implants. Two types of dental implants were used to compare the osseointegration efficiency, namely, sandblasted and acid-etched (SLA) type and calcium-coated type were used. Protein adsorption assay showed that protein adhere more by plasma treatment in both implant types. Also, cell adhesion assay showed that plasma treatment enhanced cell adhesion and proliferation. In conclusion, plasma treatment seems to be advantageous for osseointegration on dental implant surfaces.

Understanding the Transport Mechanism of Paleo-deposits in the Sonoran Desert with Grain Size Distribution and Shape Analysis

정아라 한국지리학회 2020 한국지리학회지 Vol.9 No.2

About tens of meters thick fine sand and silt deposits are observed at the top of the sedimentary logs of hundreds of drilling wells throughout Phoenix metropolitan area, Arizona, USA, situated in north-central Sonoran Desert, and likely deposited after ~ 836ka. A hypothesis to explain the paleo-deposits is that the deposits are a wind-blown deposits derived from the floodplains of nearby rivers developed in response to the aeolian-fluvial interactions. The purpose of this study is to reconstruct paleoenvironment and to understand the processes of transport and deposition of the paleo-deposits using modern analogues. This is accomplished via the identification of the paleo-deposits by comparison with modern source-bordering dune sediments and fluvial sediments using the analyses of grain size distribution and grain shape parameters. Overall, the results of sediment drift potential, grain size distribution and shape analyses provide evidence to support the hypothesis, and the deposition of the paleo-deposits may be related with the change of regional climates. Grain shape parameters may better reflect the mechanism of transport when grains traveled over short distance. Given the advantage, the grain shape analysis may provide a new insight to solve the issue associated with the provenance of Korean loess-like sediments whether it was originated from far-distant the Chinese Loess Plateau and peripheral areas or from nearby floodplains of local river or from exposed fine materials in the Yellow Sea.

Genetic Analysis of Locally Advanced Well-Differentiated Thyroid Cancer: Clinical Prognostic Implications

정아라,강순성,전승연,이윤세 대한이비인후과학회 2023 대한이비인후과학회지 두경부외과학 Vol.66 No.12

Background and Objectives Despite the usually favorable prognosis of well-differentiatedthyroid cancer (WDTC) following appropriate treatment, advanced T-staged WDTCs are as-sociated with poor prognosis. This study focused on identifying genes associated with theprognosis of locally advanced WDTC by analyzing a The Cancer Genome Atlas cohort. Subjects and Method We analyzed the data of 501 patients with WDTC and classifiedthem into two subgroups: pathological T4 stage (Cluster 1) or T1-3 stage (Cluster 2). We com-pared the mRNA expressions of thyroid cancer-related genes, and the somatic mutation fre-quencies of various cancer genes between the two subgroups. Results Cluster 1 included 23 patients (papillary=21/follicular-variant papillary thyroid can-cer [FVPTC]=2) and Cluster 2 478 patients (papillary=371/ FV PTC=10 0/ot her s=7). Cluster 1showed worse overall and disease-free survival than Cluster 2 ( p<0.05 and p=0.12 , respe c-tively). Patients with pT4 stage had about a 1.8-fold increased risk of overall recurrence ordeath. MET, SERPINA1, TIMP1, PROS1, FN1, CDKN2A, and CDKN2B were significantly ele-vated while TG, DNAH9, TFF3, CR A BP1, TPO, JAK2, KIT, KDR, and NFE2L2 were signifi-cantly lower in Cluster 1 (all, p<0.05 and adjusted p<0.05). A TERT, EIF1A X, and ATMshowed significantly frequent somatic mutations in Cluster 1 when compared to Cluster 2. Wealso identified seven pathways related to 16 genetic markers. Conclusion Locally advanced WDTC presented 16 genetic alterations. We identified so-matic mutations associated with local invasion transformation. Relevant pathways related tothe 16 genetic markers could be therapeutic targets. Genetic analysis of locally advancedWDTC may be used to predict clinical applications in patient survival.

성장기 부모화경험이 대인관계문제에 미치는 영향: 내현적 자기애 하위유형을 매개로

정아라 ( Ara Jung ),박성옥 ( Sungok Park ) 아시아문화학술원 2018 인문사회 21 Vol.9 No.4

본 연구는 성장기의 부모화 경험이 대인관계문제에 미치는 영향에서 내현적 자기애의 각 하위요인이 갖는 매개효과를 검증하고자 하였다. 이를 위해 D광역시 대학생 488명을 대상으로 자기보고식 설문을 실시하였고 구조방정식 모형을 분석하였다. 연구결과는 다음과 같다. 첫째, 상관분석 결과 부모화, 대인관계문제, 내현적 자기애는 유의한 정적 상관이 있었다. 둘째, 부모화 경험과 대인관계문제의 관계에서 내현적 자기애의 하위요인의 매개효과 모형을 검증한 결과 내현적자기애의 하위요인인 인정욕구/거대자기환상, 착취/자기중심성, 과민/취약성은 부모화 경험과 대인관계문제의 관계를 완전매개 하는 반면, 소심/자신감 부족은 매개하지 않는 것으로 나타났다. 이는 부모화 경험이 대인관계문제에 직접적인 영향을 미치기보다는 내현적 자기애를 구성하는 인정욕구/거대자기환상, 착취/자기중심성, 과민/취약성을 통해 간접적으로 영향을 미친다는 것을 의미한다. 이러한 결과는 부모화된 자녀가 대인관계문제를 호소할 때 그들의 특성에 대한 인식과 지식을 갖추는데 필요한 기초자료를 제공하였다는 점에서 의의가 있다. 마지막으로 연구의 제한점과 추후 연구를 위한 제언을 제시하였다. This study examined the mediating effect of covert narcissism subtypes on the relationship between parentification in childhood and interpersonal problems among college students. For this purpose, 488 college students in D Metropolitan City completed a self report survey. The data were analyzed by using structural equation modeling. The results of the study are as follows. First, correlation analysis showed that was a significant positive correlation between parentification, interpersonal problems, and covert narcissism. Second, As a result of verification on mediating effect model of covert narcissism subtypes in parentification and interpersonal problems, Need for recognition/giant self illusion, exploitation/self centeredness, and irritability/vulnerability is fully mediated the relationship between parentification and interpersonal problems, while lack of confidence didn't mediate. This implies that parenfication indirectly affects through each sub-factor covert narcissism rather than directly affecting the interpersonal problem. The study offers basic information on how to support parentified children. Finally, Limitations of this study and implications for future studies were discussed.

요가와 필라테스 지도자의 이미지와 커뮤니케이션 능력 및 참여자 만족도의 관계

정아람(Jung, A-Ram),이지환(Lee, Ji-Hwan),김태형(Kim, Tai-Hyung) 한국체육과학회 2017 한국체육과학회지 Vol.26 No.6

The purpose of this study is providing fundamental data and information on promotion of Yoga & Pilates teaching and management by studying what relationship among instructor’s image, communication skill and participant satisfaction of Yoga and Pilates. The survey was done through 200 members in Yoga and Pilates center in Seoul & Gyeonggi-do and excluding 23 copies ran an analysis on the remaining 177 (88.5%) copies. After question investigating the data which is collected used IBM SPSS Statistics 21 and IBM AMOS 21 program, frequency analysis, exploratory factor analysis, Cronbach’s α, confirmatory factor analysis, correlation analysis, path analysis through structural equation model (SEM). The result of this study were as follows. First, instructor’s image showed (+) effects on communication skill. Second, instructor’s image showed (+) effects on participant satisfaction. Third, communication skill showed (+) effects on participant satisfaction. Therefore Yoga and Pilates instructors have to take a sense of duty for teaching and raise learning efficiency by proper instructor’s image and communication skill, it will be take positive effect for Yoga & Pilates center management activation and high satisfaction.

회원작품 - 수원소방서 이의119안전센터

정아,Jeong, Ah 대한건축사협회 2023 建築士 Vol.651 No.-

Conversion to Paradoxical Finding on Technetium-99m-labeled RBC Scintigraphy after Treatment for Secondary Raynaud’s Phenomenon

정아리,하정민,송호천,김자혜,최수진나 대한핵의학회 2013 핵의학 분자영상 Vol.47 No.4

An 18-year-old woman reported that after exposure to cold temperatures her fingers appeared blue and her hands and feet felt cold. Secondary Raynaud’s phenomenon (RP)associated with peripheral vascular disease was suspected. Technetium (Tc)-99m-labeled RBC hand scintigraphy after cold change showed decreased blood pool activity in her fingers. The patient’s symptoms improved after she received sarpogrelate HCL (200 mg/day) and nifedifine (40 mg/day). Follow-up scintigraphy performed 7 months after the patient started treatment showed paradoxically increased blood pool activity in her fingers after cold challenge. To the best of our knowledge, this is the first case report of a patient with secondary RP showing paradoxical change on scintigraphy after she received medication that improved her symptoms.