Carbazole Functionalized Silole: Synthesis, Aggregation-induced Emission, and Electrochemical Polymerization

이아랑,한원식 대한화학회 2015 Bulletin of the Korean Chemical Society Vol.36 No.7

A carbazole-functionalized silole, 9,9′-(4,4′-(2,3,4,5-tetraphenyl-1H-silole-1,1-diyl)bis(4,1-phenylene))bis(9H-carbazole) (BPCTPS ), was prepared through the reaction of dilithium diene with tetrachlorosilane followed by a direct substitution reaction with (4-(9H-carbazol-9-yl)phenyl)lithium. Combining the carbazole donor with the silole acceptor resulted in a new type of donor–acceptor (D–A) dyad. Density function theory (DFT) calculations showed that the highest occupied molecular orbital was localized on the carbazole group whereas the lowest unoccupied molecular orbital was localized on the silole group. BPCTPS exhibited very weak emission properties in dilute solution but emitted intensely in the aggregated state, revealing that it was an aggregation-induced emission (AIE)-active species. Furthermore, addition of electron donating groups to the silole ring resulted in a slight red shift of both the absorption and emission spectra compared with those of the reference compound hexaphenylsilole ( HTS ). The electrochemical properties of BPCTPS were also studied by cyclic voltammetry (CV), which indicated that the compound formed a cross-linked film on the Pt electrode via electropolymerization.

자본이동 및 환율 변동성에 대응한 통합적 정책체계 논의와 시사점

이아랑,나승호,채동우 한국경제학회 2023 한국경제포럼 Vol.16 No.1

This paper summarizes recent discussions on the integrated policy system centered on the IMF and the BIS and derives policy implications for Korea. The approach to an integrated policy system starts from the recognition that capital flows and exchange rate volatility in emerging countries tend to be heightened due to changes in global financial conditions, such as monetary policies in advanced countries, thus active responses are needed. It can be seen as a progress of the existing view of the interest rate policy with free floating exchange rate system as an ideal policy framework. In the short term, Korean foreign exchange policy and capital flow management measures will not change significantly under the influence of this discussion. In establishing long-term foreign exchange market advance development plans and policy directions, however, it is necessary to preemptively judge the depth of Korea’s foreign exchange market, the currency mismatch embedded in external assets and liabilities position, and the degree of foreign investors’ influence on the government bond market.

First case of a prosthetic joint infection caused by Candida rugosa

이아랑,강승지 대한내과학회 2022 대한내과학회 추계학술대회 Vol.2022 No.2

Cut-Off Values for Visceral Fat Area Identifying Korean Adults at Risk for Metabolic Syndrome

이아랑,김예지,오승원,이철민,최호준,조희경,오범조,황승식,김승재,권오덕 대한가정의학회 2018 Korean Journal of Family Medicine Vol.39 No.4

Background: Cut-off values for visceral fat area (VFA) measured by computed tomography (CT) for identifying individualsat risk of metabolic syndrome (MetS) have not been clearly established in Korean adults, particularly forlarge populations. We aimed to identify optimal VFA and waist circumference (WC) cut-off values and compare theability of VFA and WC to predict the presence of ≥2 metabolic risk factors. Methods: We included 36,783 subjects aged 19–79 years undergoing abdominal fat CT during regular health checkupsbetween January 2007 and February 2015 in Seoul. The risk factors for MetS except WC were based on the InternationalDiabetes Federation criteria. Receiver operating characteristic curve analyses were used to determinethe appropriate VFA and WC cut-off values for MetS. Results: VFA was a more significant predictor of metabolic risk factors than WC and body mass index (BMI). Theoptimal cut-off values for VFA and WC were 134.6 cm2 and 88 cm for men and 91.1 cm2 and 81 cm for women, respectively. We estimated age-specific cut-off values for VFA, WC, and BMI. VFA cut-off values increased with age,particularly among women. Conclusion: This large population study proposed the cut-off values for VFA and WC for identifying subjects at riskof MetS among Korean adults. For more accurate diagnosis, different age-specific cut-off values for VFA and WCmay be considered.

Seneca Falls, Another Feminine Mystique? A Historiography of the Nineteenth-century Woman Suffrage Movement

하아랑 서울대학교 미국학연구소 2022 미국학 Vol.45 No.2

The historiography of the American women’s suffrage movement in the nineteenth century is marked by the rise and fall of its master narrative. Since the feminist movement and women’s history were established simultaneously in the 1960s, the scholarship of the women’s suffrage movement has reflected specific agendas of feminist politics of each age. In the late 1960s and 1970s, feminist historians invented the master narrative by conceptualizing the suffrage movement as first-wave feminism. After the late 1970s, scholars of race and racism began retrieving African American women’s contributions to the suffrage movement, and since the mid-1990s, historians have expanded the scope of the suffrage movement by rediscovering its richer traditions. This recent tendency has raised fundamental questions regarding the legitimacy of the waves metaphor as a conceptual device. Facing these questions, the master narrative is being gradually undermined in the scholarship of the suffrage movement and American women’s history in general.

기억의 반노예제, 희망의 반노예제 -노예제 폐지 이후 중국 이민자 문제와 반노예제 운동의 분열-

하아랑 한국서양사학회 2022 西洋史論 Vol.- No.155

This article examined the controversy among antislavery activists over Chinese immigration after the Civil War. This article argued that the free labor ideology, which was once the ideological lynchpin of the American antislavery movement up until the abolition of slavery, had evolved into serving as a political wedge in the post-emancipation period by using Ralph Waldo Emerson's framework of “the party of memory” versus “the party of hope.” In the controversy over the Chinese question, some antislavery veterans sided with the anti-immigration nativists, concerned that the unfree Chinese “coolie slaves” might destroy the hard-earned free labor system in postbellum America. Other antislavery activists, more optimistic about their country’s goodwill and ability, welcomed the Chinese newcomers as free-labor partners who could help Americans develop the western land, eradicate the vestiges of slavery, and promote diverse cultures in the United States. Prior to the Civil War, the free labor ideology made the claim that once slaves were emancipated, the American republic would inevitably advance toward a more promising future of freedom and wealth. After the Civil War, American society faced a new set of issues brought on by the emergence of industrial capitalism and imperialist expansion, many of which were frequently seen in the context of slavery, such as “wage slavery,” “coolie slavery,” and “women slavery.” These new forms of slavery were intertwined with the Chinese question. As the controversy over Chinese immigration revealed, the antislavery movement and ideology did not end with the abolition of slavery. 이 글은 노예제가 폐지된 직후에 중국인 이민을 둘러싸고 발생한 반노예제 운동가들 사이의 분열을 탐구하면서, 그간 이들을 결집시켜왔던 자유노동 이데올로기가 역설적으로 그 분열의 핵심 원인이었다고 주장한다. 이 글은 랄프 왈도 에머슨이 제시한 인간사회를 양분하는 두 개의 세계관, 즉 과거에 종속된 채 다가올 미래를 두려워하는 “기억의 집단”과 미래지향적이고 낙관주의적 사고에 기반한 “희망의 집단”이라는 개념을 차용해 반노예제 운동가들의 분열 양상을 분석한다. “기억의 반노예제주의자들”은 중국인 이민이 자유노동 체제를 질식시키고 결국 미국의 진보를 가로막을 것이라고 주장하며 반이민 토착주의의 선봉에 섰다. 한편 “희망의 반노예제주의자들”에 따르면 중국인 이민자들은 서부 개발에 필수적인 노동력을 제공할 것이며, 잔존한 흑인 강제노동의 악습을 타파할 자유노동 체제의 수호자였다. 이 글은 중국인 이민을 둘러싼 노예제 폐지론자들의 분열 양상을 제시함으로써, 반노예제 운동가들의 믿음과는 달리 노예제 폐지가 사회의 모든 부정의와 악을 일소하는 완전무결한 해법이 아니었다는 점을 보여준다. 자유노동 이데올로기를신봉하던 노예제폐지론자들은 노예제가 폐지되기만 한다면 미국은 노예제의 속박에서 벗어나 자유와 번영의 미래로 순조롭게 나아갈 것이라고 믿었다. 그러나 노예제 폐지 이후에도 이들은 산업자본주의의 도래가 야기한 노동의 불안정화, 서구열강의 비서구권을 향한 제국주의적 팽창 등의 다양하고 새로운 문제에 맞닥뜨렸다. 낯선 문제에 봉착했을 때, 노예제폐지론자들은 자유노동의 수호라는 목적을 위해 중국 이민자 문제에 대한 상반된 해법을 제시했던 것이다.

배터리/슈퍼커패시터 하이브리드 시스템 최적 알고리즘 고찰

임아랑(A-Rang Lim ),김현빈(Hyun-Bin Kim),김종수(Jong-Soo Kim),윤재중(Jae-Jung Yun) 대한전기학회 2017 대한전기학회 학술대회 논문집 Vol.2017 No.7

현대 여성의 T-팬티 조형성 연구 -미국, 프랑스, 영국, 일본 시장을 중심으로-

양아랑,이효진 복식문화학회 2009 服飾文化硏究 Vol.17 No.6

This study aims to analyze contemporary women's sense of fashion aesthetic by looking into the design and trend of T-panties, which have now carved out a new niche in the world's 21st century female underwear markets. By this, I'd like to reassure readers of the importance of T-panties, which has only been recently recognized, and more generally suggests the future direction of prominent T-panty design development. First, western urban chic, Japanese minimalism and domestic modern feminine images all have common modern urban sense and simple designs. However, each image is not a simple image in itself. For example, in the case of western style they often seek to convey a sophisticated and stylish street sense, while Koreans add a more cute, lovely, and feminine touch. Second, western restrained eroticism, Japanese fetishism and domestic mono-bosom images all have a common interest in sex. They is something, however, which they all express this differently. In Japan, they prefer a stimulating image. In the West, however, this is restrained by controlling and limiting overt sexual elements, while in Korea, we seek to capture a more simple sensual beauty. Third, western couture luxury, Japanese orientalism and Korean utopia narcissism have classy images in common including splendid materials and decorations with embroidery. They all differ depending on their nationality. This study is baseds on the documents study. This study is baseds on the documents study.

Epitaxial growth of multi-layer hexagonal boron nitride on sapphire

장아랑,신현석 한국공업화학회 2016 한국공업화학회 연구논문 초록집 Vol.2016 No.0

Large-scale growth of high-quality hexagonal boron nitride has been a challenge in two-dimensional-material-based electronics. Herein, we present wafer-scale and wrinkle-free epitaxial growth of multi-layer hexagonal boron nitride on a sapphire substrate by using low-pressure chemical vapor deposition. Microscopic and spectroscopic investigations and theoretical calculations reveal that synthesized hexagonal boron nitride has a single rotational orientation with AA` stacking order. A facile method for transferring hexagonal boron nitride onto other target substrates was developed, which provides the opportunity for using hexagonal boron nitride as a substrate in practical electronic circuits. A graphene field effect transistor fabricated on our hexagonal boron nitride sheets shows highly improved carrier mobility, because the ultra-flatness of the hexagonal boron nitride surface can reduce the substrate-induced degradation of the carrier mobility of two-dimensional materials.

Geographic homogeneity and high gene flow of the pear psylla, Cacopsylla pyricola (Hemiptera: Psyllidae), detected by mitochondrial COI gene and nuclear ribosomal internal transcribed spacer 2

강아랑,김익수,백지연,이상현,조영식,김월수,한연수 한국통합생물학회 2012 Animal cells and systems Vol.16 No.2

The pear psylla, Cacopsylla pyricola (Hemiptera: Psyllidae), is a serious insect pest of commercial pear crops. The species, which resides on pear trees throughout its life cycle, is rapidly spreading in some regions of the world. The population genetic structure of the species collected from several pear orchards in Korea was studied to understand the nature of dispersal and field ecology of the species. The 658-bp region of mitochondrial COI gene and the 716-bp long complete internal transcribed spacer 2 (ITS2) of the nuclear ribosomal DNA were sequenced. Unlike other previously studied insect pests, the COI-based genetic diversity of the pear psylla was extremely low (maximum sequence divergence of 0.15%). This finding allowed us to conclude that the species may have been introduced in Korea relatively recently. ITS2 sequence-based analyses of phylogeny, population differentiation, gene flow, and hierarchical population structure all concordantly suggested that the pear psylla populations in Korea are neither genetically isolated nor hampered for gene flow. These genetic data are concordant with the dispersal of an overwintering winterform morph outside the non-pear habitat in the fall.