The effects of Mo doping on 0.3Li[Li_0.33Mn_0.67]O₂·0.7Li[Ni_0.5Co_0.2Mn_0.3]O₂ cathode material

Park, Jin-Hwan,Lim, Jinsub,Yoon, Jaegu,Park, Kyu-Sung,Gim, Jihyeon,Song, Jinju,Park, Hyosun,Im, Dongmin,Park, Minsik,Ahn, Docheon,Paik, Younkee,Kim, Jaekook The Royal Society of Chemistry 2012 Dalton Transactions Vol.41 No.10

<P>Mo doped Li excess transition metal oxides formulated as 0.3Li[Li<SUB>0.33</SUB>Mn<SUB>0.67</SUB>]O<SUB>2</SUB>·0.7Li[Ni<SUB>0.5-<I>x</I></SUB>Co<SUB>0.2</SUB>Mn<SUB>0.3-<I>x</I></SUB>Mo<SUB>2<I>x</I></SUB>]O<SUB>2</SUB> were synthesized using the co-precipitation process. The effects of the substitution of Ni and Mn with Mo were investigated for the density of the states, the structure, cycling stability, rate performance and thermal stability by tools such as first principle calculations, synchrotron X-ray diffraction, field-emission SEM, solid state <SUP>7</SUP>Li MAS nuclear magnetic resonance (NMR), X-ray photoelectron spectroscopy (XPS), elemental mapping by scanning TEM (STEM), inductively coupled plasma atomic emission spectrometry (ICP-AES) and a differential scanning calorimeter (DSC). It was confirmed that high valence Mo<SUP>6+</SUP> doping of the Li-excess manganese-nickel-cobalt layered oxide in the transition metal enhanced the structural stability and electrochemical performance. This increase was due to strong Mo–O hybridization inducing weak Ni–O hybridization, which may reduce O<SUB>2</SUB> evolution, and metallic behavior resulting in a diminishing cell resistance.</P> <P>Graphic Abstract</P><P>Mo doped Li excess transition metal oxides formulated as 0.3Li[Li<SUB>0.33</SUB>Mn<SUB>0.67</SUB>]O<SUB>2</SUB>·0.7Li[Ni<SUB>0.5-x</SUB>Co<SUB>0.2</SUB>Mn<SUB>0.3-x</SUB>Mo<SUB>2x</SUB>]O<SUB>2</SUB> were synthesized using the co-precipitation process. <IMG SRC='http://pubs.rsc.org/services/images/RSCpubs.ePlatform.Service.FreeContent.ImageService.svc/ImageService/image/GA?id=c2dt11833e'> </P>

A 14.2 mW 2.55-to-3 GHz Cascaded PLL With Reference Injection and 800 MHz Delta-Sigma Modulator in 0.13 <tex> $\mu$</tex>m CMOS

Dongmin Park,SeongHwan Cho IEEE 2012 IEEE journal of solid-state circuits Vol.47 No.12

<P>In this paper, a low-noise cascaded PLL is proposed where an integer-N digital bang-bang PLL is used to multiply a 50 MHz reference to an 800 MHz clock that is fed to a ΔΣ fractional-N PLL to generate 2.55-to-3 GHz output. In order to minimize the jitter of the 800 MHz clock, a reference injection scheme using dual-pulse ring oscillator is employed. Quantization noise from the delta-sigma modulator is suppressed without any noise cancellation techniques owing to the high operating frequency of the fractional-N PLL. Prototype implemented in 0.13 μm CMOS process achieves the worst-case RMS jitter of 356 fs<I>rms</I> over 100 Hz to 40 MHz integration bandwidth, while consuming 14.2 mW from a 1.2 V supply. The worst-case fractional spur measured over 7 different chips is -53.9 dBc and the reference spur is -84 dBc.</P>

Korean Red Ginseng (Panax ginseng) Potentiates the Inhibitory Actions of Testosterone on Obesity and Adipogenesis in High Fat Diet-Fed Castrated Mice

Dongmin Park,Michung Yoon 대한의생명과학회 2017 Biomedical Science Letters Vol.23 No.3

It has been suggested that ginseng is beneficial for ameliorating the aging males" symptoms, such as weight gain, fatigue, erectile dysfunction, and depression, in elderly men with testosterone deficiency. We thus investigated the effects of Korean red ginseng (Panax ginseng C.A. Meyer; Araliaceae) on obesity in a mouse model of testosterone deficiency (castrated C57BL/6J mice). The effects of ginseng extract (GE) and/or testosterone on obesity and adipogenesis in high-fat diet (HFD)-fed castrated C57BL/6J mice and 3T3-L1 adipocytes were examined using in vivo and in vitro approaches. After feeding mice a HFD for 8 weeks, we found that mice also receiving GE and/or testosterone showed decreased body weight, adipose tissue mass, adipocyte size, and hepatic lipid accumulation compared with untreated HFD-fed mice. Expression of adipogenic genes (PPARγ, C/EBPα, and aP2) was decreased by GE and/or testosterone in adipose tissues. Consistent with the in vivo data, lipid accumulation and the mRNA expression of adipogenesis genes in 3T3-L1 adipocytes were decreased by GE, ginsenosides, and testosterone. The inhibitory effects of GE (or ginsenosides) were comparable to those of testosterone, and the effects of co-treatment with GE (or ginsenosides) and testosterone were greater than those of testosterone alone in vivo and in vitro. Our results indicate that ginseng may be able to potentiate the inhibitory effects of testosterone on obesity and adipogenesis in HFD-fed castrated mice, providing possible therapeutic implications in men with testosterone deficiency.

Design Techniques for a Low-Voltage VCO With Wide Tuning Range and Low Sensitivity to Environmental Variations

Dongmin Park,SeongHwan Cho IEEE 2009 IEEE transactions on microwave theory and techniqu Vol.57 No.4

<P>This paper presents design techniques for a low-voltage voltage-controlled oscillator (VCO) with a wide tuning range and low sensitivity to process, voltage, and temperature (PVT) variations. For wide tuning range, a switched tuning scheme is employed coupled with voltage-boosting techniques in a manner that improves the quality factor and tuning range of a switched capacitor array. To minimize the design overhead required for a robust VCO, an adaptive body-biasing technique is proposed, which relaxes the startup constraint and increases the VCO's immunity to PVT variations. The proposed VCO is implemented in 0.18-mum CMOS technology and operates at 2.4 GHz. It achieves phase noise of - 117 dBc/Hz at 1-MHz offset and a tuning range 20% while consuming 365 muW of power. The figure-of-merit with the tuning range is -197 dBc/Hz, which is the lowest among recent state-of-the-art low-voltage VCOs.</P>

Vibration Characteristics of Pipelines varied with Support Types

Dongmin Shin(신동민),Insun Park(박인선),Dukyoung Hwang(황덕영),Miae Park(박미애),Jinhee Kim(김진희),Minyoung Choi(최민영),Wonjin An(안원진),Bije Han(한비제) 한국소음진동공학회 2016 한국소음진동공학회 학술대회논문집 Vol.2016 No.10

Inactivation of the PtdIns(4)P phosphatase Sac1 at the Golgi by H₂O₂ produced via Ca²⁺-dependent Duox in EGF-stimulated cells

Park, Sujin,Lim, Jung Mi,Park, Seon Hwa,Kim, Suree,Heo, Sukyeong,Balla, Tamas,Jeong, Woojin,Rhee, Sue Goo,Kang, Dongmin Elsevier 2019 FREE RADICAL BIOLOGY AND MEDICINE Vol.131 No.-

<P><B>Abstract</B></P> <P>Binding of epidermal growth factor (EGF) to its cell surface receptor induces production of H<SUB>2</SUB>O<SUB>2</SUB>, which serves as an intracellular messenger. We have shown that exogenous H<SUB>2</SUB>O<SUB>2</SUB> reversibly inactivates the phosphatidylinositol 4-phosphate [PtdIns(4)P] phosphatase Sac1 (suppressor of actin 1) at the Golgi complex of mammalian cells by oxidizing its catalytic cysteine residue and thereby increases both the amount of Golgi PtdIns(4)P and the rate of protein secretion. Here we investigated the effects of EGF on Sac1 oxidation and PtdIns(4)P abundance at the Golgi in A431 cells. EGF induced a transient increase in Golgi PtdIns(4)P as well as a transient oxidation of Sac1 in a manner dependent on elevation of the intracellular Ca<SUP>2+</SUP> concentration and on H<SUB>2</SUB>O<SUB>2</SUB>. Oxidation of Sac1 occurred at the Golgi, as revealed with the use of the Golgi-confined Sac1-K2A mutant. Knockdown of Duox enzymes implicated these Ca<SUP>2+</SUP>-dependent members of the NADPH oxidase family as the major source of H<SUB>2</SUB>O<SUB>2</SUB> for Sac1 oxidation. Expression of a Golgi-targeted H<SUB>2</SUB>O<SUB>2</SUB> probe revealed transient EGF-induced H<SUB>2</SUB>O<SUB>2</SUB> production at this organelle. Our findings have thus uncovered a previously unrecognized EGF signaling pathway that links intracellular Ca<SUP>2+</SUP> mobilization to events at the Golgi including Duox activation, H<SUB>2</SUB>O<SUB>2</SUB> production, Sac1 oxidation, and PtdIns(4)P accumulation.</P> <P><B>Highlights</B></P> <P> <UL> <LI> EGF elicits transient H<SUB>2</SUB>O<SUB>2</SUB> production at the Golgi by Ca<SUP>2+</SUP>-dependent Duox. </LI> <LI> This H<SUB>2</SUB>O<SUB>2</SUB> inactivates Sac1 at the Golgi by transiently oxidizing its catalytic Cys. </LI> <LI> Transient inactivation of Sac1 results in a transient increase in Golgi PtdIns(4)P. </LI> <LI> This new EGF signaling pathway links Ca<SUP>2+</SUP> to Golgi PtdIns(4)P via Duox-H<SUB>2</SUB>O<SUB>2</SUB>-Sac1. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>

[용어와 건축] 쎅찌야

박동민(Park, Dongmin) 대한건축학회 2019 建築 Vol.63 No.2

현대 조선식 건축의 탄생

박동민(Park, Dongmin) 대한건축학회 2018 대한건축학회논문집 Vol.34 No.10

In the late 1950s, departing from their unquestioning following of Soviet architecture, North Koreans attempted to discover the specificities of traditional Korean architecture and apply them to their contemporary monuments. This paper examines the ways in which North Korean architects developed their unique version of Socialist realism in the making of Pyongyang Grand Theater. The traditional elements in harmony with North Korea’s political ideology-an early form of Juche ideology-and modern building technologies were to be viewed as contemporary elements, and not as a simple revival of the past. This study applies Socialist realism’s compositional principle "national in form and socialist in content" to Pyongyang Grand Theater and examines specifically what "socialist content" and "national form” were and how the two were combined in the construction of Pyongyang Grand Theater. By situating the building in the context of localization of Socialist realism which is universal art principle of the communist world, this study contributes to the deeper and wider understanding of North Korea’s Modern Joseon Architecture.

주택법상 인·허가의제에 따른 지구단위계획의 절차상 문제

박동민(Park, Dongmin),박균성(Park, Kyun-Sung) 충남대학교 법학연구소 2021 法學硏究 Vol.32 No.4

지구단위계획이란 도시·군계획 수립 대상지역의 일부에 대하여 토지이용을 합리화하고 그 기능을 증진시키며 미관을 개선하고 양호한 환경을 확보하며, 그 지역을 체계적·계획적으로 관리하기 위하여 수립하는 도시·군관리계획의 하나이다. 이와 관련 주택법은, 사업계획승인권자가 사업계획을 승인 또는 변경 승인할 때 국토계획법에 따른 지구단위계획구역의 지정 또는 변경에 관한 계획과 지구단위계획의 결정 등에 관하여 관계 행정기관의 장과 협의한 사항에 대하여는 해당 인·허가 등을 받은 것으로 의제하는 규정을 두고 있다. 의제된 지구단위계획의 하자와 이에 대한 불복방안과 관련하여, 먼저 인·허가의제 대상 처분의 실재 여부가 문제되나, 인·허가가 실제로 존재하는 것은 아니지만 법적으로 존재하는 것으로 보는 것이라고 이해할 필요가 있다. 절차의 집중에 대해서는 절차집중설과 제한적 절차집중설의 대립이 있고, 판례 또한 절차집중설의 입장에 있다. 그러나 절차집중만을 강조할 경우 이해관계인의 권익보호라는 관점, 즉 적법절차의 원칙에 문제가 없지 않다. 행정기관 사이의 ‘협의’만으로 사업계획이 승인되고, 주민과 지방의회의 의견 청취 등 모든 절차를 생략해도 된다는 것은 타당하지 않다. 또한 ‘협의’의 의미와 관련하여 견해가 대립하나, 의제대상 인·허가기관의 협의는 엄격한 의미의 자문이나 동의가 아닌 사실상 동의로 보는 것이 타당하다. 인·허가의제 대상 처분의 하자를 이유로 불복을 할 경우 대상적격이 문제되고, 대법원 판례도 모순되는 판결이 공존한다. 의제되는 인·허가가 법적으로 실재한다는 입장에서 의제되는 인·허가에 고유한 위법사유가 있는 경우 의제되는 인·허가 처분만 취소 가능한 것으로 봄이 타당하다. 한편 주택법상 사업계획승인에 따라 지구단위계획이 의제되는 현행법의 태도 자체가 과연 타당한 것인지 살펴볼 필요가 있다. 주택법에 의한 아파트의 건설은 주택부족 문제를 해결하기 위한 효율적인 방안이지만, 일단 건설되고 나면 교통문제, 환경문제 등 주변에 크나큰 영향을 미친다. 그럼에도 현행 주택법에 따른 아파트건설사업은 인·허가의제를 통해 도시계획적 검토와 판단을 회피하는 수단으로 이용되고 있다. 국토계획법에 따른 지구단위계획을 바탕으로 아파트건설 등 개발사업이 이루어져야 함에도 주택법의 사업계획승인으로 지구단위계획을 의제하여 국토계획법상 절차적 규정들을 무력화하는 것은 본말이 전도된 것이다. 주택법에 의한 지구단위계획의 의제를 폐지하고, 지구단위계획 수립 후 주택건설사업승인 절차를 이행하는 방안을 검토할 필요가 있다. The district unit plan means an urban or Gun management plan formulated to rationalize land utilization, to increase its functionality, to improve aesthetics, to secure a better environment, and to manage the relevant area in a systematic and planned manner, for part of an area subject to the formulation of an urban or Gun plan. In this regards, the Housing Act includes a provision that “deems to authorize or permit” the project plan that has been consulted with the heads of related administrative agencies in the process of planning the designation or the change of designation of the area affected by the district unit planning or determining the district unit plan under the National Land Planning and Utilization Act(Land Planning Act). Regarding the appeals on the defected district unit plan that has been deemed to be authorized or permitted, the issue is whether the agency disposition was existed. It should be understood that the disposition has never exited de facto, but it has existed de jure. There are two leading theories which focus on procedure: the theory of procedural focus and the theory of limited procedural focus. However, if the procedure is overly-stressed, the rights of interested parties can be overlooked, which may raise the issue of due process. It is neither appropriate nor desirable to exempt all the procedures such as holding hearings for residents and local governments just because the development project was deemed to be authorized or permitted by the simple fact that it has been consulted among agencies under other law. Also, there are conflicting views on what “consultation” means. It is more appropriate to understand the consultation does not mean giving advice or agreement in a strict term, but rather means an agreement de facto. If there is an appeal on the defected disposition that was deemed to be authorized or permitted, the issue is whether the disposition object can be sued. There are conflicting case laws even in the supreme court level. Following the theory that the deemed authorization or permission exists de jure, if the deemed authorization or permission has a distinct unlawfulness, then the disposition of authorization or permission that are deemed should be canceled. On the other hand, we should think about whether it is appropriate that the current law deems to authorize or permit a district unit plan according to an approval of a project plan under the Housing Act. The construction of the apartment complex is an efficient way to solve a housing shortage problem. However, once the complex has been constructed, it affects the traffic and the environment of the area to a great degree. Nonetheless, the “deemed to authorize or permit” provision of the current Housing Act is used to avoid the discussion and judgement over the construction project from a urban planning perspective. It should be more appropriate and logical to approve development projects, such as the construction of apartment complex, according to a district unit planning under the Land Planning Act. The current law and practice deems to authorize or permit a project plan under the Housing Act, thereby overrides procedural provisions of the Land Planning Act. It is as absurd as to put the cart before the horse. The “deemed to authorize or permit” provision under the Housing Act should be abolished and the procedure to approve a housing construction only after district unit planning should be established.

A Low-Noise and Low-Power Frequency Synthesizer Using Offset Phase-Locked Loop in 0.13-<tex> $\mu{\rm m}$</tex> CMOS

PyoungWon Park,Dongmin Park,SeongHwan Cho IEEE 2010 IEEE microwave and wireless components letters Vol.20 No.1

<P>In this letter, a fractional-N frequency synthesizer based on an offset phase-locked loop (OPLL) architecture is presented. The proposed synthesizer achieves low-noise as the two low-pass filters that are inherent in the OPLL highly suppresses the quantization noise from the delta-sigma modulator. In addition, it consumes low power by employing charge-recycling technique in the sub-PLL. A prototype synthesizer implemented in 0.13 μm CMOS process achieves 9 dB of noise reduction compared to a conventional PLL while consuming 3.2 mW of power.</P>