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초등학교 3학년 읽기학습부진 학생을 위한 일대일 어휘 중재 사례 연구: 명시적 정의, 상황적 맥락, 형태소 분석을 중심으로
김동일 ( Kim¸ Dongil ),이연재 ( Lee¸ Yeonjae ),김희은 ( Kim¸ Heeeun ),김민하 ( Kim¸ Minha ),김명난 ( Kim¸ Myeongnan ) 충남대학교 교육연구소 2021 교육연구논총 Vol.42 No.4
본 연구는 초등학교 3학년 읽기 학습부진 학생에게 일대일 어휘 중재를 실시한 사례 연구로, 사전검사, 진전도 3차, 사후검사의 5가지 검사에서 나타난 학생들의 전체 어휘 검사 점수, 그리고 하위 영역인 명시적 정의, 상황적 맥락, 형태소 분석 점수가 어떻게 변화하는지 확인 함으로써 추후 중재 연구에 기초 자료를 제공하고자 하는 목적을 가진다. 이를 위하여 2021년 5월부터 7월까지 경기도 S 시 소재 3학년 읽기 학습부진 학생 8명을 대상으로 15회기의 어휘 집중 중재와 지속적인 진전도 모니터링을 실시하였으며, 학생들의 검사 총점과 하위 영역별 원점수, t 점수를 그래프로 시각화하였다. 어휘 영역 사후검사 원점수는 사전검사에 비해 5점에서 24점 사이의 향상을 보였으며, 학생별 편차는 있었지만 명시적 정의, 상황적 맥락, 형태소 분석의 하위 영역 점수도 향상하였다. 또한, 학생을 직접 지도한 강사의 보고를 결과와 함께 제시하여 점수 변화의 원인과 맥락을 설명하였다. 본 연구의 결과를 토대로 초등학교 3학년 어휘 집중 중재의 효과적 방안과 어휘 하위영역별 성취, 지속적인 교육과정 중심 측정의 필요성에 대해 논의하였다. The present study is a case study of one-on-one vocabulary intervention for students with reading difficulties in the third grade of elementary school, and aims to provide basic data for future intervention by checking the students' overall vocabulary test scores and the scores of the sub-areas of explicit definition, situational context, and morpheme analysis scores. From May to July 2021, intensive vocabulary intervention and continuous progress monitoring were conducted for eight third-grade students with reading difficulties in S city, Gyeonggi-do. Students' total score and t-score for total vocabulary and for the sub-areas were visualized as graphs. The original score of the vocabulary area post-test showed an improvement of 5 to 24 points compared to the pre-test, and although there were variations by student, the scores of the sub-areas of explicit definition, contextual context, and morpheme analysis also improved. The report of the instructor who taught students was presented with the results to explain the cause and context of the change in scores. Based on the results of this study, the need for effective vocabulary intervention in the third grade of elementary school, achievement by vocabulary sub-area, and continuous curriculum-based measurement were discussed.
Lee, Dongil,Kim, Yong-Hun,Lee, Daewoong,Kim, Lee-Sup IEEE 2018 IEEE transactions on circuits and systems. a publi Vol.65 No.11
<P>This brief presents a 0.65-V power noise tolerant source-synchronous injection-locked receiver with 13.4 dB channel loss compensation. To meet the 1UI timing constraint for the decision feedback equalizer in low supply, SR latches are removed in the feedback path and return to zero recovered data is used for equalization. Additionally, a power noise sensitivity of low supply is relieved by current and pMOS body bias control techniques of an oscillator. The test core fabricated in 65-nm CMOS process achieves 11.2 Gb/s with 0.303 pJ/bit FOM compensating 13.4 dB channel loss at 5.6 GHz.</P>
Lee, Dongil,Lee, Taeho,Kim, Young-Ju,Kim, Lee-Sup IEEE 2016 IEEE transactions on circuits and systems. a publi Vol.63 No.8
<P>This brief presents a 2-GHz dividerless injectionlocked phase-locked loop (PLL) (ILPLL) with a voltage-controlled oscillator (VCO) control voltage ripple-compensated phase detector (PD) (RICPD). The proposed lock detector (LD) can detect not only the frequency difference between VCO frequency and target frequency but also the coarse phase position. With the help of the LD, the RICPD has a simple architecture using AND gates, relieving mismatches in the PD and charge pump. Additionally, the RICPD improves the performance of phase noise by a ripple compensation technique and solves an UP/DN pulse mismatch problem of PLL with a simple structure. As a result, the proposed ILPLL improves jitter performance by 21% (471-fs integrated jitter from 1 kHz to 40 MHz). The test core fabricated in a 65-nm CMOS process consumes 6.2 mW.</P>
Using CoreSight PTM to Integrate CRA Monitoring IPs in an ARM-Based SoC
Lee, Yongje,Lee, Jinyong,Heo, Ingoo,Hwang, Dongil,Paek, Yunheung Association for Computing Machinery 2017 Transactions on Design Automation of Electronic Sy Vol.22 No.3
<P>The ARM CoreSight Program Trace Macrocell (PTM) has been widely deployed in recent ARM processors for real-time debugging and tracing of software. Using PTM, the external debugger can extract execution behaviors of applications running on an ARM processor. Recently, some researchers have been using this feature for other purposes, such as fault-tolerant computation and security monitoring. This motivated us to develop an external security monitor that can detect control hijacking attacks, of which the goal is to maliciously manipulate the control flow of victim applications at an attacker's disposal. This article focuses on detecting a special type of attack called code reuse attacks (CRA), which use a recently introduced technique that allows attackers to perform arbitrary computation without injecting their code by reusing only existing code fragments. Our external monitor is attached to the outside of the host system via the system bus and ARM CoreSight PTM, and is fed with execution traces of a victim application running on the host. As a majority of CRAs violates the normal execution behaviors of a program, our monitor constantly watches and analyzes the execution traces of the victim application and detects a symptom of attacks when the execution behaviors violate certain rules that normal applications are known to adhere. We present two different implementations for this purpose: a hardware-based solution in which all CRA detection components are implemented in hardware, and a hardware/software mixed solution that can be employed in a more resource-constrained environment where the deployment of full hardware-level CRA detection is burdensome.</P>
Real-Time Smoke Detection Method for Early Detection of Fire in Road Tunnel
Dongil Han,Jeonghun Lee,Byoungmoo Lee,Seong Joon Yoo 대한전자공학회 2008 ICEIC:International Conference on Electronics, Inf Vol.1 No.1
In this paper, we proposed image-processing technique for automatic real-time smoke detection in tunnel fire environment. To minimize false detection of fire in tunnel we used motion information of video sequence. And this makes it possible to detect exact position of event in early stage with detection, test, and verification procedures. In addition, by comparing false detection elimination results of each step, we have proved the validity and efficiency of proposed algorithm.
Three-Dimensional Fin-Structured Semiconducting Carbon Nanotube Network Transistor
Lee, Dongil,Lee, Byung-Hyun,Yoon, Jinsu,Ahn, Dae-Chul,Park, Jun-Young,Hur, Jae,Kim, Myung-Su,Jeon, Seung-Bae,Kang, Min-Ho,Kim, Kwanghee,Lim, Meehyun,Choi, Sung-Jin,Choi, Yang-Kyu American Chemical Society 2016 ACS NANO Vol.10 No.12
<P>Three-dimensional (3-D) fin-structured carbon nanotube field-effect transistors (CNT-FETs) with purified 99.9% semiconducting CNTs were demonstrated on a large scale 8 in. silicon wafer. The fabricated 3-D CNT-FETs take advantage of the 3-D geometry and exhibit enhanced electrostatic gate controllability and superior charge transport. A trigated structure surrounding the randomly networked single-walled CNT channel was formed on a fin-like 3-D silicon frame, and as a result, the effective packing density increased to almost 600 CNTs/mu m. Additionally, highly sensitive controllability of the threshold voltage (V-TH) was achieved using a thin back gate oxide in the same silicon frame to control power. consumption and enhance performance. Our results are expected to broaden the design margin of CNT-based circuit architectures for versatile applications. The proposed 3-D CNT-FETs can potentially provide a desirable alternative to silicon based nanoelectronics and a blueprint for furthering the practical use of emerging low-dimensional materials other than CNTs.</P>
Lee, Min-Young,Choi, Dongil,Jang, Moon-Sun,Lee, Jung Hee American Chemical Society 2018 Bioconjugate chemistry Vol.29 No.7
<P>Currently, most MRI probes available for clinical use contain gadolinium, which is a high-risk paramagnetic metal that can cause severe side effects (e.g., nephrogenic systemic fibrosis). To limit such side effects and improve diagnostic efficacy, we developed a novel biocompatible MRI contrast agent using glucose, glycine, and paramagnetic iron ion. Glucose and glycine were polymerized into melanoidin by the nonenzymatic Maillard reaction, and Fe<SUP>3+</SUP> was chelated stably with the melanoidin during polymerization. The Fe<SUP>3+</SUP>-melanoidin chelate had biocompatibility, biodegradability, and unique contrast effects on both T<SUB>1</SUB>- and T<SUB>2</SUB>-weighted MRI, depending on the pH and oxidative environments. The administration of the Fe<SUP>3+</SUP>-melanoidin chelate to a mouse model of liver cancer showed highly enhanced liver-to-tumor contrasts on both T<SUB>1</SUB>- and T<SUB>2</SUB>-weighted MRI.</P> [FIG OMISSION]</BR>
Lee, Hyuk,Lee, Jong Kyun,Kang, Seok Seon,Choi, Dongil,Jang, Kee-Tack,Kim, Jeong Hwan,Lee, Kyu Taek,Paik, Seung Woon,Yoo, Byung Chul,Rhee, Jong Chul G. Thieme 2007 Hepato-gastroenterology Vol.54 No.79
<P>BACKGROUND/AIMS: The differential diagnosis of early-stage pancreatic cancer and mass-forming pancreatitis is still unsettled. The purpose of the present study was to define the differential feature of focal mass-forming pancreatitis and malignant mass using aspects of clinical, laboratory and imaging features on pancreatogram or computed tomography (CT). METHODOLOGY: Between April 1995 and May 2003, 15 patients confirmed as inflammatory mass after surgical resection for pancreatic mass and 21 patients with early-stage pancreatic adenocarcinoma among the patients diagnosed as pancreatic malignancy were included in our study. Hospital records, laboratory results, findings of imaging studies and pathological findings were reviewed retrospectively. RESULTS: Regarding the clinical characteristics, the history of previous pancreatitis was distinguished in group with mass-forming pancreatitis. Incidence of jaundice was higher in the group with adenocarcinoma than in the mass-forming pancreatitis group. For laboratory results, CA19-9 level and alkaline phosphatase level were significantly elevated in the malignant group. Findings such as hyperattenuation on portal venous phase of CT scans and gradual tapering stricture on pancreatogram were differential diagnostic markers between the two groups. A portion of patients with mass-forming pancreatitis demonstrated the pathologic characteristics of autoimmune pancreatitis. CONCLUSIONS: Our 9-year experience suggests that imaging findings such as attenuation pattern on the delayed phase of CT scan and tapering pattern of pancreatic ductal stricture on pancreatogram can help to differentiate mass-forming pancreatitis from early-stage pancreatic adenocarcinoma.</P>