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 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.

The Linear and Branched Alkyl Side Chains on Planar Semiconducting Molecules

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

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.

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.

한국 교포 어린이의 기초 운동 움직임 기능 발달도

정아란 한국초등무용학회 1997 한국초등무용학회지 Vol.2 No.1

The purpose of this study was to develop a profile of the level of motor skills of Korean-American children living in the United States. Proficiency in both locomotor and object control skills were measured for 24 Korean-American male children age 34 to 28 months, using the Test of Gross Motor Development (TGMD) (Ulrich, 1985). Results indicated the mean standard score for the locomotor skills of the subjects was 11 (63rd percentile) ; while the range was from the 1st - 98th percentile. The mean standard score for the object control skills of Korean-American children was 13 (84th percentile) ; while the range of object-control standard scores was from the 37th - 99th percentile. While group mean data show average to above average skill development, individual data dipict wide variance in skill level. Further research should study motor skills of native Korean children to gain better insight into the development of these skills.

조손(祖孫)가정의 격대교육에 대한 보육교사들의 인식

정아란,김영철 한국보육학회 2014 한국보육학회지 Vol.14 No.2

The purpose of this study is researching that awareness of child care teachers about grandparent-headed families' alternate-generation education. The topics for this study are the teachers' difficulty of teaching grandparent-headed families' children, the awareness of teachers' alternate-generation education, and activation methods of alternate-generation education. The participants of interview were 18 directors and teachers of 9 child education institution in Jeollanam-do. The results were as follows; First, teachers have difficulty of grandparent-headed families about teaching children of daily life's habits, children's low self-esteem, and interviewing with grandparents. Second, teachers were lacked that awareness of alternate-generation education at first, but they become aware of alternate-generation education's value while research interview. At last, It need methods to activation of alternate-generation education that usage words of alternate-generation education, development of programs for grandparents' children education ability, and education to teachers for understanding grandparents. 본 연구는 조손가정의 격대교육에 대한 보육교사의 인식을 알아보는데 그 목적이 있다. 이를 위해 조손가정 영유아 지도에 대한 교사의 어려움, 격대교육에 대한 교사의 인식, 격대교육의 활성화 방안을 연구문제로 설정한 질적 연구이다. 본 연구를 위하여 전라남도의 9개소 어린이집 원장과 교사 등 18명을 대상으로 심층면담을 실시하였다. 연구결과는 다음과 같다. 첫째, 교사는 조손가정의 영유아에 대한 기본생활습관 지도, 유아의 자아존중감이 낮은 점, 조부모와의 상담에 대한 어려움이 있는 것으로 나타났다. 둘째, 교사의 격대교육에 대한 인식이 부족하였으나 면담 중 점차 격대교육의 가치를 인지한 것으로 파악되었다. 셋째, 격대교육의 활성화 방안으로 격대교육의 용어 사용하기, 조부모교육 프로그램 개발, 조부모를 이해하기 위한 교사교육이 필요한 것으로 나타났다.

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.

자율-비자율차 혼재상황을 고려한 고속도로 안전성 평가 방법론 개발

정아람,조영,오철 대한교통학회 2023 대한교통학회 학술대회지 Vol.88 No.-

자율차의 도입은 혼합교통류 안전성에 부정적인 영향을 미칠 수 있으며 혼합교통류는 오랜 기간동안 지속될 것으로 예측된다. 자율차의 안전한 도입과 교통류 안전성에 긍정적인 영향을 미치기 위해서는 혼합교통류 상황에 대한 주행행태를 분석할 필요가 있다. 본 연구의 목적은 혼합교통류 상황에 대한 도로 안전성 평가 방법을 개발하고 활용 방안을 제시하는 것이다. 시뮬레이션 상에 자율차 거동을 구현하고 multi-agent driving simulation을 통해 선후행 차량간 주행데이터를 수집하였다. 본 연구에서의 도로 안전성 평가 방법을 이용하여 안전성 취약구간의 특성을 파악하고 노선별 risk score를 도출방안을 제시하였다. 종‧횡방향의 경우 각각 평행식 가‧감속차로가, 선후행 차량간 안전성의 경우 평면곡선반지름이 710m이고 오르막 경사가 3%인 복합선형 구간이 가장 취약한 것으로 나타났다. 본 연구의 도로 안전성 평가 방법과 risk score 도출 방안을 이용해 나타난 결과는 혼합교통류 상황에서 안전성이 저하할 것으로 판단되는 구간을 선제적으로 파악할 수 있으며 자율주행 안전구간 등의 지정을 위한 방안 마련 시 기초자료로 활용할 수 있다.