A Wideband On-Interposer Passive Equalizer Design for Chip-to-Chip 30-Gb/s Serial Data Transmission

Heegon Kim,Jonghyun Cho,Joohee Kim,Sumin Choi,Kiyeong Kim,Junho Lee,Kunwoo Park,Pak, Jun So,Joungho Kim IEEE 2015 IEEE transactions on components, packaging, and ma Vol.5 No.1

<P>In this paper, a novel on-interposer passive equalizer is proposed for chip-to-chip high-speed data transmission on the silicon-based on-interposer channel. The proposed equalizer uses the parasitic resistance and inductance of the on-interposer shunt metal lines to produce the high-pass filter. This filter enables the proposed equalizer to exhibit wideband channel equalization and low power-consumption. Based on the equivalent-circuit model of the proposed on-interposer passive equalizer, the physical dimensions of the equalizer are optimized for 30-Gb/s serial data transmission. The performance of the proposed equalizer with the optimized dimensions was successfully demonstrated by both frequency- and time-domain measurements at data rates of up to 30 Gb/s. In addition, a compact on-interposer passive equalizer was designed for the wide I/O interposer using the same mechanism. The improved quality of serial data transmission in the equalized wide I/O on-interposer channel was successfully verified by simulations at data rates of up to 10 Gb/s.</P>

CISG의 국제거래법적 함의 - CISG 제95조 유보 등 미국의 경우를 사례로 하여 -

김기영(KiYeong Kim) 조선대학교 법학연구원 2016 法學論叢 Vol.23 No.1

우리나라도 유엔통일매매법협약(CISG)에 가입한지 11년째이다. 사법통일에 있 어 가장 성공한 예로 평가되고 있는 CISG는 이미 가입국 수가 전 세계국가의 반 을 넘고 있어, CISG는 많은 경우에 국제협약이면서도 국내 매매법과 같은 위상 을 가지면서 국제물품매매계약 대하여 적용되는 준거법이 되고 있다. 이에 CISG 가 언제 적용되며, 언제 적용이 배제되는지, 그리고 그 실체법적 주요내용과 조약으로서의 특징은 무엇인지 궁금하지 않을 수 없다. 본고는 CISG가 국제조약으로 서 갖는 중요한 특징의 하나로 제 95조 유보에 초점을 맞추어, 그러한 유보가 CI SG의 실체법적 차원에서 어떠한 의미를 갖는지, 미국, 영국 등의 국내법과 비교 검토하고, 나아가 일본법, 그리고 우리 법과는 어떠한 차이를 갖는지를 간략히 살 펴보려 한다. 비교법적 검토를 함에 있어, 단순히 실체법적 조항의 비교를 넘어, 각국의 법문화와 사법전통, 법계상의 차이, 나아가 통신과 과학기술의 발전을 배 경으로 나날이 발전하고 있는 국제적 법학 학술교류 등이 갖는 함의를 생각해 보 려 한다. 또한 사법의 통일은 어려우면서도 전략적이고 외교적 성격을 가지는 문 제로서, 향후 사법의 통일이 가속화되는 경우, 우리의 외교 전략이나, 우리 사법 부와 법률전문가들의 새로운 마인드가 필요한 시점이라 아니할 수 없다. 이에 사법의 통일을 통한 국제거래법 영역의 발전과 우리의 자세 등을 결어로서 간략히 제시해 보려 한다. Now the jurists in the area of international sales contract must be taunted without the due understanding of UN Convention on the International Sales of Goods, what we call CISG in abbreviation. Nearly half of global nations has subscribed to the convention as a signatory or party state meaning that they generically accept the convention as their domestic sales law in the case that the parties of member states engage in the international sales contract. The scope and application of CISG norms will expand in terms of Art. 1 (1)(b) and may reduce upon the stipulation of parties for the exclusion of norms effect. In this context, the possibility as a governing law for the international sales contract can increase or decrease. Nonetheless, its importance as a sales law within the international arbitration and domestic jurisdictions needs no further remark. The CISG is one of greatest achievements for the uniform private law movement since 1945, and its lesson has a repercussion on the understanding of private laws and national diplomacy or strategy as well as the norm appliers of each nation. This article exemplified the US case in that it had attached the Art. 95 declaration for excluding its applicability about the exercise of parties choice of law. Given its varying impact on the contracting parties, the illustration will help to better understand the CISG especially in terms of comparative analysis with the laws of UK, Japan, and US, as well as the comparative legal traditions and court attitude. The paper also extends the implications of private uniform law that creates a challenge diplomatically or strategically and within the justice administration of Korean judiciary and national trade lawyers.

2015 개정 교육과정 정책이 교사의 수업활동과 학생의 핵심역량에 미친 영향 분석

김이경(Kim, Ee-gyeong),김경현(Kim, Gyunghyun),이세미(Lee, Semi),김기영(Kim, Kiyeong),윤예지(Yoon, Yeaji) 한국교육정치학회 2020 敎育政治學硏究 Vol.27 No.2

본 연구는 2015년 개정 교육과정 정책 도입 이후 교사의 수업활동 및 학생의 핵심역량에서 발견되는 변화 양상을 분석하고 두 변수 간 영향관계를 규명할 목적으로 수행되었다. 한국교육종단연구 2013의 4차년도(2016)와 6차년도(2018) 데이터 가운데 고등학교 1학년 학생 5,575명의 응답 자료를 토대로 기술통계, t-검증, 일원분산분석(ANOVA)과 다중 회귀분석방법을 활용하여, 교사의 수업활동 및 학생의 핵심역량에 대한 인식 수준과 배경 변인에 따른 차이, 그리고 교사의 수업활동이 학생의 핵심역량에 미치는 영향을 분석하였다. 연구 결과 첫째, 학생들은 교사들의 수업이 학습자와 역량함양 중심으로 실시되었다는 점에는 높게 동의했지만, 과정과 피드백 중심 학생평가는 다소 미진한 것으로 인식하였다. 학생들은 자신들의 6개 핵심 역량 모두를 대체로 높게, 그리고 중2때보다 고1때 좀 더 높게 인식하는 경향이 있었다. 둘째, 교사 수업활동과 학생 핵심역량 수준의 집단 간 차이를 분석한 결과, 학교 유형에서 공통적인 특징이 발견되었는데, 특목고와 자율고 학생이 특성화고 학생에 비해 통계적으로 유의한 높은 인식 수준을 보였다. 셋째, 독립변수인 교사의 수업활동 영역 가운데 ‘과정 및 피드백 중심 평가’를 제외한 ‘역량 함양 중심 수업’과 ‘학습자 중심 수업’의 실시는 학생의 핵심역량에 통계적으로 유의한 영향을 미친 것으로 확인되었다. 본 연구결과를 토대로 2015 개정 교육과정이 교사의 수업활동과 학생의 핵심역량에 미친 영향을 종합적으로 논의하고 연구결과가 교육과정 정책에 주는 시사점을 제시하였다. This study seeks to analyze the characteristics found in teachers teaching activities and students core competencies since the introduction of the 2015 curriculum policy. Out of 「KELS 2013」, the 4th(2016) and 6th(2018) data set, the responses of 5,575 10th grade students were analyzed. Descriptive statistics, t-test, ANOVA, and multiple regression methods were used to answer three research questions. The results revealed the following. First, while students’ perception on teachers teaching activities was positive, their perception on teachers’student evaluation method was somewhat low, as it lacked feedback and process focus. Second, students generally recognized the level of their core competencies highly, and the level increased as their grade level went up. Third, with respect to the level of both teachers’instructional activities and student core competencies, the responses of students in special-purpose high schools and autonomous high schools were higher than those of vocational high schools. Finally, teachers’ teaching activities were found to have a statistically significant effect on students core competencies. Based on the findings of the study, a few policy recommendations were presented after discussing the effects of the 2015 curriculum policy on the teacher s teaching and students core competencies.

Modeling and Analysis of Through-Silicon Via (TSV) Noise Coupling and Suppression Using a Guard Ring

Jonghyun Cho,Eakhwan Song,Kihyun Yoon,Jun So Pak,Joohee Kim,Woojin Lee,Taigon Song,Kiyeong Kim,Junho Lee,Hyungdong Lee,Kunwoo Park,Seungtaek Yang,Minsuk Suh,Kwangyoo Byun,Joungho Kim IEEE 2011 IEEE transactions on components, packaging, and ma Vol.1 No.2

<P>In three-dimensional integrated circuit (3D-IC) systems that use through-silicon via (TSV) technology, a significant design consideration is the coupling noise to or from a TSV. It is important to estimate the TSV noise transfer function and manage the noise-tolerance budget in the design of a reliable 3D-IC system. In this paper, a TSV noise coupling model is proposed based on a three-dimensional transmission line matrix method (3D-TLM). Using the proposed TSV noise coupling model, the noise transfer functions from TSV to TSV and TSV to the active circuit can be precisely estimated in complicated 3D structures, including TSVs, active circuits, and shielding structures such as guard rings. To validate the proposed model, a test vehicle was fabricated using the Hynix via-last TSV process. The proposed model was successfully verified by frequency- and time-domain measurements. Additionally, a noise isolation technique in 3D-IC using a guard ring structure is proposed. The proposed noise isolation technique was also experimentally demonstrated; it provided -17 dB and -10dB of noise isolation between the TSV and an active circuit at 100 MHz and 1 GHz, respectively.</P>

저사양 IoT 디바이스의 안전한 부트 및 업데이트를 위한 보안 시스템 설계 및 구현

이기영(Kiyeong Lee),김병선(Byoungseon Kim),조진성(Jinsung Cho) 한국정보과학회 2018 정보과학회논문지 Vol.45 No.4

저사양 IoT 디바이스는 다양한 보안 솔루션들을 적용하기에 많은 제약이 따른다. 이는 대부분의 보안 솔루션들이 고성능 PC 환경을 대상으로 구현되기 때문이며, 이러한 한계는 IoT 디바이스의 기술적인 보안 취약점과 다양한 보안 위협들이 꾸준히 증가하는 원인이 되고 있다. 이에 본 논문에서는 저사양이라는 제약적인 환경에서 적용 가능한 안전한 부트 및 펌웨어 업데이트 시스템을 제안한다. 제안하는 시스템은 부트 단계 시, 디바이스의 펌웨어의 무결성을 검증하고 펌웨어 업데이트는 업데이트를 시도하는 주체에 대한 신뢰성 검증을 수행한다. 마지막으로 저사양 IoT 디바이스에서 발생할 수 있는 각종 위협들을 통해 본 논문에서 제안한 시스템의 보안 성능을 분석한다. Low-end IoT devices are problematic due to the many limitations involved in applying IoT devices to various existing security solutions. This is because most security solutions are targeted at high-performance PC environments. These limitations are causing steadily increasing technical security vulnerabilities and various security threats to IoT devices. In this paper, we propose a secure boot and firmware update system that can be applied in a constrained environment. At the secure boot, the proposed system verifies the integrity of the firmware of the device. The secure firmware update performs reliability verification of the subject attempting to update. Finally, we analyze the security performance of the proposed system by simulating various threats that may occur in low-end IoT devices.

정전 유도형 소자의 스위칭 특성과 응용기술

김동희(Kim-Donghee),배진호(Bae-Jinho),배영호(Bae-Yeongho),권순걸(Kwon-Soonkurl),서기영(Seo-Kiyeong) 대한전기학회 1991 대한전기학회 학술대회 논문집 Vol.1991 No.7

저사양 IoT 디바이스의 안전한 펌웨어 업데이트를 위한 시스템 설계 및 구현

이기영(Kiyeong Lee),이기웅(Kiwoong Lee),김병선(Byoungseon Kim),조진성(Jinsung Cho) 한국정보과학회 2017 한국정보과학회 학술발표논문집 Vol.2017 No.06

축류팬 팁 틈새와 유량이 공력 및 소음 특성에 미치는 영향에 관한 수치적 연구

조기영(Kiyeong Jo),한상욱(Sangwook Han),김형민(Hyung Min Kim),양시영(Siyoung Yang) 대한기계학회 2020 대한기계학회 춘추학술대회 Vol.2020 No.12

The thermal management of the industrial and technical systems are the most important topic to increase the performance and energy efficiency of the system. The simplest way to cool the system is to use an axial fan, however another problem with improving the cooling performance is the fan noise caused by the airflow. And it is known that the noise intensity of the axial fan is affected by the tip clearance. In the research it has been performed a flow simulation with a rotating fan to determine the relationship between the noise and tip clearance. For the turbulent flow RANS, k-omega SST turbulence model has been applied and BNS model are applied to define the noise level by the flow. By comparing the performances of the axial fan as tip clearance varies from 1 to 3mm, it was verified that the flow rate at BEP is not coincides with the designed volume flow rate. In addition, it was confirmed that the acoustic power level increased as the tip clearance increased.

Modeling of an On-Chip Power/Ground Meshed Plane Using Frequency Dependent Parameters

Chulsoon Hwang,Kiyeong Kim,Jun So Pak,Joungho Kim 한국전자파학회JEES 2011 Journal of Electromagnetic Engineering and Science Vol.11 No.3

This paper proposes a new modeling method for estimating the impedance of an on-chip power/ground meshed plane. Frequency dependent R, L, and C parameters are extracted based on the proposed method so that the model can be applied from DC to high frequencies. The meshed plane model is composed of two parts: coplanar multi strip (CMS) and conductor-backed CMS. The conformal mapping technique and the scaled conductivity concept are used for accurate modeling of the CMS. The developed microstrip approach is applied to model the conductor-backed CMS. The proposed modeling method has been successfully verified by comparing the impedance of RLC circuit based on extracted parameters and the simulated impedance using a 3D-field solver.

한국어 운율구의 자동검출에 관한 연구

김동호(Dongho Kim),이기영(Kiyeong Lee),송민석(Minsuck Song) 한국통신학회 1999 한국통신학회 학술대회논문집 Vol.1999 No.7