High-Efficiency PCB- and Package-Level Wireless Power Transfer Interconnection Scheme Using Magnetic Field Resonance Coupling

Sukjin Kim,Jung, Daniel H.,Kim, Jonghoon J.,Bumhee Bae,Sunkyu Kong,Seungyoung Ahn,Jonghoon Kim,Joungho Kim IEEE 2015 IEEE transactions on components, packaging, and ma Vol.5 No.7

<P>As technology develops, the number of chips increases while the thickness of mobile products continuously decreases, which leads to the need for high-density packaging techniques with high numbers of power and signal lines. By applying wireless power transfer technology at the printed circuit board (PCB) and package levels, the number of power pins can be greatly reduced to produce more space for signal pins and other components in the system. For the first time, in this paper, we propose and demonstrate a high-efficiency PCB- and package-level wireless power transfer interconnection scheme. We enhance the efficiency by applying magnetic field resonance coupling using a matching capacitor. The proposed scheme can replace a high number of power interconnections with rectangular spiral coils to wirelessly transfer power from the source to the receiver at the PCB and package levels. The equivalent circuit model is suggested with analytic equations, which is then analyzed to optimize the test vehicle design. For the experimental verification of the suggested model, the $Z$ -parameter results obtained from the model-based equation and measurement of the designed and fabricated test vehicles are compared at up to 1 GHz. The power transfer efficiency from the source coil to the receiver coil in this scheme is able to reach 85.6%. Finally, we designed and fabricated a CMOS full-bridge rectifier and mounted it on the receiver board to convert the transferred voltage from ac voltage to dc voltage. A measured dc voltage of 2.0 V is sufficient to operate the circuit, which generally consists of 1.5 V devices.</P>

Chip-Level Simultaneous Switching Current Measurement in Power Distribution Network Using Magnetically Coupled Embedded Current Probing Structure

Kim, Jonghoon J.,Changhyun Cho,Bumhee Bae,Sukjin Kim,Sunkyu Kong,Heegon Kim,Jung, Daniel H.,Jiseong Kim,Joungho Kim IEEE 2014 IEEE transactions on components, packaging, and ma Vol.4 No.12

<P>A simultaneous switching current (SSC) drawn by an integrated circuit (IC) creates simultaneous switching noise on power nets, which in turn causes jitters in the I/O signals and reduces the maximum clock frequency. For a thorough analysis of high-speed ICs, there is a dire need to measure currents at specific power pins of the ICs. In this paper, a novel magnetically coupled embedded current probing structure is proposed for measuring the SSC on the chip level resulting from the logical activity of the I/O buffers. SSCs are found by capturing the magnetic flux induced by the SSC of interest, with the proposed embedded current probing structure using magnetic coupling, and then reconstructing the original current waveform using the transfer impedance profile. Through a series of measurements with test vehicles fabricated on the chip level, we experimentally verified the proposed probing structures in the time and frequency domains and proved that they can effectively measure the SSC. Finally, future directions for improvements are discussed at the end of this paper.</P>

30 Gbps High-Speed Characterization and Channel Performance of Coaxial Through Silicon Via

Jung, Daniel H.,Heegon Kim,Sukjin Kim,Kim, Jonghoon J.,Bumhee Bae,Jonghoon Kim,Jong-Min Yook,Jun-Chul Kim,Joungho Kim THE INSTITUTE OF ELECTRICAL ENGINEERS 2014 IEEE Microwave and Wireless Components Letters Vol. No.

<P>Coaxial through silicon via (TSV) technique allows reduction of high frequency loss due to conductivity in silicon substrate and flexibility in impedance by controlling the ratio of shield to center radii. For the first time, we measured and analyzed the high-speed channel performance of coaxial TSV. This letter presents the measurement results of the fabricated test vehicle in S-parameter and eye-diagram. The eye-diagram measurement results prove that coaxial TSV is capable of supporting signal transmission up to bit rate of 30 Gbps. The equivalent circuit model is suggested and experimentally verified by S-parameter comparison. Furthermore, the superiority of coaxial TSV over conventional TSV is confirmed by comparison of S-parameter results from equivalent circuit model simulation.</P>

Effects of Tillage and Cultivation Methods on Carbon Accumulation and Formation of Water-stable Aggregates at Different Soil Layer in Rice Paddy

Kim, Sukjin,Choi, Jong-Seo,Kang, Shingu,Park, Jeong-Hwa,Hong, Sunha,Kim, Tae-su,Yang, Woonho 한국토양비료학회 2017 한국토양비료학회지 Vol.50 No.6

No-tillage is an effective practice to save labor input and reduce methane emission from the paddy. Effects of tillage and cultivation methods on carbon accumulation and soil properties were investigated in the treatments of tillage-transplanting (T-T), tillage-wet hill seeding (T-WS), minimum tillage-dry seeding (MT-S) and no-tillage dry seeding (NT-S) of rice. Soil carbon was higher in NT-S and MT-S, compared to T-T and T-WS. In NT-S and MT-S, soil carbon contents were the highest in the top soil (5 cm depth) and decreased with soil depth. In T-T and T-WS, however soil carbon contents showed no significant difference up to soil depth of 15 cm from the top. Carbon content was the highest in the soil particle size under $106{\mu}m$ and decreased as the soil particle size increased. Contents of water-stable aggregates in NT-S and MT-S were higher than those of T-T and T-WS. In NT-S and MT-S, contents of water-stable aggregates were the highest in the top soil and significantly decreased with soil depth while no significant difference up to the soil depth of 15 cm in T-T and T-WS. Available $SiO_2$ contents in the top soil were the highest in NT-S and MT-S while the lowest in T-T and T-WS. It is concluded that minimum or no disturbance of soil in rice cultivation can increase carbon accumulation in the soil, especially in the top layer, and subsequently contribute to the formation of the water-stable soil aggregates.

Syntactic analysis on Information Structure

Sukjin Kim 한국언어과학회 2020 한국언어과학회 학술대회 Vol.2020 No.10

This paper is to map information structure into syntax structure by analysing Korean cleft sentences namely, 'Kesun' and 'Kinun' cleft sentence. The derivation of Korean cleft sentences is analyzed with two main ways, base generation and movement analysis. This paper insists that first, ‘Kesun’ cleft is the division by Topic and Identificational Focus and ‘Kinun’ cleft is the division by Contrastive Topic and Informational Focus. Second, basic syntactic function of the two cleft sentences in Korean is movement. and to support this movement, several functional categories are inserted, namely, a nominalizer ‘-n kes’ and ‘ki’, and Functional verb ‘-ida’. And the last, a basic tree diagram for Korean language is like the following. This tree diagram above shows that on the ground that ‘–n kes’ can accommodate tense and auxiliaries, Topic Phrase is located above ModP and because ‘-ki’ can accommodate Aspect and Root Verb, Contrastive Topic Phrase is located above AspP and under TP. Information structure believed to be located above syntactic structure can be clearly shown with this diagram and this can be applied to analyze not only cleft sentence but also information structrure related phenomena in korean language and even more to, hopefully, Indo-Eropean cleft setences.

Effects of Tillage and Cultivation Methods on Carbon Accumulation and Formation of Water-stable Aggregates at Different Soil Layer in Rice Paddy

Sukjin Kim,Jong-Seo Choi,Shingu Kang,Jeong-Hwa Park,Sunha Hong,Tae-su Kim,Woonho Yang 한국토양비료학회 2017 한국토양비료학회지 Vol.50 No.6

No-tillage is an effective practice to save labor input and reduce methane emission from the paddy. Effects of tillage and cultivation methods on carbon accumulation and soil properties were investigated in the treatments of tillage-transplanting (T-T), tillage-wet hill seeding (T-WS), minimum tillage-dry seeding (MT-S) and no-tillage dry seeding (NT-S) of rice. Soil carbon was higher in NT-S and MT-S, compared to T-T and T-WS. In NT-S and MT-S, soil carbon contents were the highest in the top soil (5 cm depth) and decreased with soil depth. In T-T and T-WS, however soil carbon contents showed no significant difference up to soil depth of 15 cm from the top. Carbon content was the highest in the soil particle size under 106 μm and decreased as the soil particle size increased. Contents of water-stable aggregates in NT-S and MT-S were higher than those of T-T and T-WS. In NT-S and MT-S, contents of water-stable aggregates were the highest in the top soil and significantly decreased with soil depth while no significant difference up to the soil depth of 15 cm in T-T and T-WS. Available SiO2 contents in the top soil were the highest in NT-S and MT-S while the lowest in T-T and T-WS. It is concluded that minimum or no disturbance of soil in rice cultivation can increase carbon accumulation in the soil, especially in the top layer, and subsequently contribute to the formation of the water-stable soil aggregates.

Column Chromatography-Free Solution-Phase Synthesis of a Natural Piper-Amide-like Compound Library

Kim, Sumin,Lim, Chaemin,Lee, Sukjin,Lee, Seokwoo,Cho, Hyunkyung,Lee, Joo-Youn,Shim, Dong Sup,Park, Hee Dong,Kim, Sanghee American Chemical Society 2013 ACS combinatorial science Vol.15 No.4

<P>We have achieved an efficient solution-phase parallel synthesis of a library of natural piper-amide-like compounds from the bifunctional β-phosphono-<I>N</I>-hydroxy-succinimidyl ester intermediate. The primary important feature in our study is the construction of natural-product-like molecules through the adaptation of sophisticated organic reactions that create water-soluble byproducts for a chromatography-free purification. This simple and efficient method rapidly provides a combinatorial library of high yield and purity. The library was evaluated against GPCR targets to demonstrate its potential use as a tool for drug discovery and in chemical biology.</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/acsccc/2013/acsccc.2013.15.issue-4/co400003d/production/images/medium/co-2013-00003d_0009.gif'></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/co400003d'>ACS Electronic Supporting Info</A></P>

울릉도산 식물의 HepG2 세포에서 지질 축적 및 산화 스트레스 개선 효과

김숙진(SukJin Kim),김건희(Gun-Hee Kim) 한국식품저장유통학회 2020 한국식품저장유통학회지 Vol.27 No.6

풍경의 발견과 풍경의 미학

김석진(Kim, Sukjin) 민족미학회 2012 민족미학 Vol.11 No.1

풍경이 풍경미가 된다는 것은 미적인 것과의 만남에 의해 성립하는 것이다. 하지만 보는 사람의 미적 관여가 없으면 아름다운 풍경도 그냥 풍경이 되고 만다. 따라서 자연을 통해서 느낄 수 있는 인간적인 기분이 풍경미의 성립을 가능하게 하며, 인간과의 상호관계를 갖는 자연 속에서 풍경미가 표상되는 것이다. 또한 이러한 자연에 의해 체험된 인간의 감성이 창조적 행위로 이어져 예술적 미의식의 세계를 이루게 된다. 풍경미는 미적 기분에서의 통일적 전체상을 심상적 이미지로서 파악하는 것이며, 이러한 정취(情趣)적 심상풍경을 바탕으로 하여 풍경예술이 생겨난다. 그런 의미에서 풍경미는 예술창작의 유력한 모체가 되며, 그 풍경이 미적 관여를 받게 되면 예술로 전개될 가능성을 내부에 지니고 있음을 의미한다. 이처럼 풍경미와 예술미 사이에 미적 대상과의 상호적 교섭관계가 성립한다면, 자연풍경과 예술 속에서 무한한 미적 가치를 발견할 수 있다. 그래서 풍경과 예술 모두가 우리의 미적 욕구를 만족시켜 주는데 필수적 요소가 된다. 풍경미는 인간과 대립적이고 객관적인 미가 아니라 자연에 순응하고 이를 존중하는 가운데 체험되는 인간의 미적 감동에 근원을 둔 미이고, 예술미는 그러한 풍경미와 인간 사이의 소통의 통로로서 존재하게 된다. 따라서 이 글은 풍경의 미적 사유를 더 풍부하고 다양하게 시도할 수 있는 방법론을 제안하고 있다. To see the landscape and the thing to see a concrete object to experience a spatial structure. Landscape space it points the view which is whole, as condition of landscape formation the elements which are included -width and totality, unity etc.- the work which it tries to integrate is necessary. The landscape experience sees what kind of object like this and will experience the expansion which is whole unifyingly. Like this landscape becomes landscape beauty the thing to be the thing which as the image grasps the unifying whole as a matter of from of ‘aesthetic mood’, it does like this mood image landscape with opportunity and the landscape art originates. So landscape beauty will become the mother-body which artistic creation is powerful, that landscape will be made to receive aesthetic relevant and to contain the possibility which with art will be developed. Also landscape beauty and artistic beauty are different. If the mummy which it experiences naturally from the place where landscape beauty is schedule, artistic beauty is the intentional product of the human being and it is created it rips from the connection which is human. If but it refuses the court rank relationship between like this landscape beauty and artistic beauty and the trade name negotiation relationship of the aesthetic object and is formed, we it will be able to discover the aesthetic value infinite from the natural landscape and artistic inside. So the landscape and art all our aesthetic craving becomes the essential element to be satisfied.

유형적 저작물과 대비되는 디지털 저작물의 유통에 관한 법적 쟁점 연구

김석진 ( Sukjin Kim ) 연세대학교 법학연구원 의료·과학기술과 법센터 2014 연세 의료·과학기술과 법 Vol.5 No.1

It is a well known fact that anyone can distribute his music CD to others without the interference of the copyright holder. On the other hand, would it be possible to freely distribute the digital music files to anyone? Since it is not a simple copyright question to answer, this study has took following steps to find a legal solution: firstly, the differences between digital copyright work and material copyright work are analyzed. Secondly, the possibility of applying the existing copyright theories such as the exhaustion of right or fair use has been reviewed. Thirdly, The legal stance of the court of the United States and Korea regarding the issue has been introduced. Lastly, the appropriate relationship between digital copyrightwork and the Copyright Law has been suggested. Through these process, this study has conclude that digital copyright work shows a huge difference in terms of the scale of the reproduction and distribution: this creates a perilous situation which undermines the right of the copyright owners. Yet, considering the spread tendency of digital copyright work, it is needed to seek the balance point between the restriction of both digital copyright work and the exclusive right of copyright holder.