• 한국정보처리학회:학술대회논문집
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• 한국정보처리학회 2014년도 추계학술발표대회
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• pp.1130-1133
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• 2014

본 논문은 ESL(Electronic Shelf Labels, 전자가격표시기)과 LBS(Location Based Service, 위치 기반 서비스)를 융합하여 개발된 시스템으로 매장 고객에게 어플리케이션을 통해 대형마트에서 이벤트 정보를 제공 혹은 물건 위치를 쉽게 찾아 갈 수 있도록 하고, 관리자는 서버에서 물품의 정보를 관리하거나 각종 서비스를 제공하는 것을 편리하게 만들기 위해 진행되었다. ESL 태그를 아두이노와 LCD를 연결하여 구현하고 지그비(Zigbee)를 이용하여 서버와 통신한다. LBS를 구현하기위하여 ESL TAG에 BLE(Bluetooth Low Energy, 저전력블루루스)를 장착하고, 스마트폰은 ESL TAG에서 나오는 BLE 신호의 RSSI(Received Signal Strength Indication)값을 이용해 어플리케이션에서 사용자의 위치를 측정할 수 있게 한다.

• Educational Technology International
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• 제12권2호
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• pp.71-94
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• 2011

How can an automated essay scoring (AES) program, which provides feedback for essays, be a formative tool for improving ESL writing? In spite of the increasing demands for English writing proficiency, English writing instruction has not been effective for teaching and learning because of a lack of timely and accurate feedback. In this context, AES as a possible solution has been gaining the attention of educators and scholars in ESL/EFL writing education because it can provide consistent and prompt feedback for student writers. This experimental study examined the impact of different types of feedback for a college ESL writing program using the Criterion AES system. The results reveal the positive impact of AES in a college-level ESL course and differences between the teacher's feedback and the AES feedback. The findings suggest that AES can be effectively integrated into ESL writing instruction as a formative assessment tool.

• Journal of Electrical Engineering and Technology
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• 제9권2호
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• pp.589-599
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• 2014

On the basis of the traditional ZSI (Z-source inverter), this paper presents a ESL-${\Gamma}$-ZSI, which uses a unique ${\Gamma}$-shaped impedance network and an extended SL network for boosting its output voltage in addition to their usual voltage-buck behavior. The inverter can increase the boost factor through adjusting shoot-through duty ratio and increasing the number of inductors. Capacitor voltage stress of ESL-${\Gamma}$-ZSI is a constant when 1>D>0, and ESL-${\Gamma}$-ZSI has small inductor current stress. The working principle of ESL-${\Gamma}$-ZSI and comparison with the classical ZSI and SL- ZSI are analyzed in detail. The power loss comparison between ESL-${\Gamma}$-ZSI and Cuk converter is analyzed detailedly. Simulation and experimental results are given to demonstrate the operation features of the inverter.

• 영어어문교육
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• 제16권4호
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• pp.1-18
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• 2010

Recasts, which are defined as implicit types of corrective feedback, have been the focus of numerous SLA researchers for more than a decade. A range of classroom-based observational and experimental research studies have explored how and when language teachers provide recasts to learners' ill-formed utterances and aimed to understand the role of recasts in language acquisition or learning. On the basis of previous studies on recasts, our study investigated when an ESL teacher provided recasts and how recasts were provided in his class. The research questions were as follows: (1) When does an ESL teacher provide recasts? (2) How does the teacher provide recasts? The data came from observations of one ESL classroom as well as consecutive-semi structured interviews with the teacher. The data analysis included transcriptions of teacher-student interactions in the target setting and categories of recasts according to the linguistic phenomena, which prompted recasting. Based on the findings, practical suggestions for ESL teachers were provided. [156 words].

• 한국위성정보통신학회논문지
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• 제9권2호
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• pp.101-106
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• 2014

최근 전 세계적으로 전자가격 표시기 시스템이 매장 및 유통업체에서 활성화됨에 따라 2.4GHz의 동일 대역을 사용하는 무선단말기의 Wi-Fi 통신과 간섭현상이 발생하게 되었다. 무선단말기에 의한 전자가격표시기 시스템의 간섭영향을 분석하기 위해 간섭시나리오와 확장된 하타 전파모델을 설정하였다. 심캣을 적용하여 시뮬레이션을 수행하여 무선단말기 간섭으로부터 전자가격표시기 시스템의 태그를 보호하기 위한 이격거리를 도출하였다.

• 한국컴퓨터정보학회:학술대회논문집
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• 한국컴퓨터정보학회 2023년도 제68차 하계학술대회논문집 31권2호
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• pp.45-46
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• 2023

In order to improve and promote immersive learning experiences for English as a Second Language (ESL) students, the deployment of a YOLOv5 model for object identification in videos is proposed. The procedure includes collecting annotated datasets, preparing the data, and then fine-tuning a model using the YOLOv5 framework. The study's major objective is to integrate a well-trained model into ESL instruction in order to analyze the effectiveness of AI application in the field.

• BMB Reports
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• 제38권6호
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• pp.695-702
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• 2005

The groESL bicistronic operon of a restricted facultative methylotrophic bacterium Methylovorus sp. strain SS1 DSM 11726 was cloned and characterized. It was found to consist of two ORFs encoding proteins with molecular masses of 11,395 and 57,396 daltons, which showed a high degree of homology to other bacterial GroES and GroEL proteins. The genes were clustered in the transcription order groES-groEL. Northern blot analyses suggested that the groESL operon is transcribed as a bicistronic 2.2-kb mRNA, the steady-state level of which was markedly increased by temperature elevation. Primer extension analysis demonstrated one potential transcription start site preceding the groESL operon, which is located 100bp upstream of the groES start codon. The transcription start site was preceded by a putative promoter region highly homologous to the consensus sequences of Escherichia coli ${\sigma}^{32}$-type heat shock promoter, which functioned under both normal and heat shock conditions in E. coli. Heat shock mRNA was maximally produced by Methylovorus sp. strain SS1 approximately 10min after increasing the temperature from 30 to $42^{\circ}C$. The groESL operon was also induced by hydrogen peroxide or salt shock.

• 약학회지
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• 제56권3호
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• pp.173-179
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• 2012

Saussurea lappa (SL) and major compounds, sesquiterpene lactones, have been suggested to possess various biological effects, including anti-tumor, anti-ulcer, anti-inflammatory, anti-viral and cardiotonic activities. Therefore, the ethanol extract of Saussurea lappa root (ESL) is studied for the mechanism of its action in apoptotic pathway. ESL-treated cells manifested nuclear condensation, and fragmentation. ESL also triggered the mitochondrial apoptotic pathway, as indicated by a change in Bax/Bcl2 ratio and caspase-9/-3 activation. ESL induced p38 MAPK/JNK, p53, and ASK1 phosphorylation. ROS scavenger reversed ESL-induced apoptotic cell death via inhibition of caspase-3 and p38 MAPK/JNK phosphorylation. These results suggest that ESL induced apoptosis in HepG2 cells through the ROS-p38/JNK pathway.

• 한방안이비인후피부과학회지
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• 제22권1호
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• pp.100-107
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• 2009

Objective : The purpose of this study is to investigate the antibacterial activity of Saussurea lappa for the applications of herb-based extracts to both cosmetic and medicinal industries. Methods : Antibacterial activity of ethanol extract of Saussutes lappa (ESL) was assessed using agar diffusion and broth dilution methods, and determined by whether clear zone was formed around paper disc and in terms of the size (mm) of clear zone, Results : ESL provided activity against Staphylococcus aureus KCTC 1927 in concentration of 1 mg/ml with an clear zone of 16 mm, and showed an activity against Staphylococcus epidermids KCTC 1917 in concentration of 1 mg/ml with an clear zone of 18mm. Moreover, the minimum inhibitory concentration (MIC) of ESL against S. sureus and S. epidermidls were 1 mg/ml for both bacterial species. However, ESL showed no growth inhibition against Pseudomonas aeruginosa KCTC 12513, Enterobactet aerogenes KCTC 2190, Escherichia coli KCTC 2571, Salmonella typhimurium KCTC 1925 and Propionibacterium acnes KCCM 41747. Conclusions : Antibacterial activity of ESL against Staphylococcus sureus and Staphylococcus epidermids causing eye and skin diseases was proved. The result suggest that ESL may be useful as a natural preservative on behalf of synthetic preservatives.

• 비교문화연구
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• 제43권
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• pp.459-483
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• 2016

The main objective of this paper is to test the major prediction of the Aspect Hypothesis on interlanguage narratives collected from 171 Ibibio ESL learners in a classroom setting using sets of picture stories. Aspect Hypothesis predicts that lexical aspectual classes of verbs would determine the pattern of acquisition and distribution of tense-aspect morphology at the very early stages of L2 acquisition of tense-aspect verbal morphology. That is, telic verbs would be marked with the past tense-aspect verbal morphology before atelic verbs in the interlanguage of ESL learners irrespective of their L1 background. The results of our data analyses show a significant effect from the lexical aspect on the acquisition and distribution of tense-aspect morphology with chi-square statistics of ($x^2=196.92$,df = 6, n = 1664, p = <.0001). However, the effect of the lexical aspect is shown to be more prominent among Ibibio ESL learners at higher levels of proficiency. This is contrary to the prediction regarding Aspect Hypothesis. The paper concludes that the influence of the lexical aspect on the pattern of acquisition and distribution of tense-aspect morphology may be universal but the actual point along the developmental pathway when such influence is obtainable is yet to be determined. This calls for more research into the pattern of the L2 acquisition of tense-aspect verbal morphology.