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Bae, Seongjun,Nam, Inho,Park, Soomin,Yoo, Young Geun,Park, Jongseok,Lee, Jong Min,Han, Jeong Woo,Yi, Jongheop American Scientific Publishers 2017 Journal of Nanoscience and Nanotechnology Vol.17 No.1
<P>A sponge-like Li4Ti5O12/graphene composite was prepared via sequential hydrothermal process and solid-state heat treatment process for the application to high-power lithium ion batteries. The as-prepared electrode showed outstanding Li electroactivities with a rapid and reversible Li insertion/extraction of up to 10 C-rate (1.75 A/g). It delivered a discharge capacity of 174 mAh/g at 0.5 C, near the theoretical capacity of Li4Ti5O12, with good rate capability and cyclic stability. First-principles calculations revealed the intimate interaction of the Li4Ti5O12 and graphene, which implies that graphene functions as an 'electron tunnel.' Electrochemical impedance spectroscopy also proved that the graphene-hybridization and the unique structure of the Li4Ti5O12 material significantly reduce the resistive behavior of electrodes. The 3D structured Li4Ti5O12/graphene hybrid reported herein could be a promising candidate for a safe, low-cost, high-power anode for lithium ion batteries, and our seeding-growth-sintering method for decorating graphene with active material will offer an effective upgrade on highly insulating Li4Ti5O12 materials.</P>
AN APPROACH TO THE PROBLEM OF COMMON POOL RESOURCES THROUGH AN EXTENSION OF THE EQUILIBRIUM CONCEPT
Bae, Jaegug,Kim, Jongseok,Kang, Eun Sook The Honam Mathematical Society 2013 호남수학학술지 Vol.35 No.2
Many studies of experimental economics have produced outcomes which contradict the predictions of Nash equilibrium, which relies heavily upon the premise of selfishness of an individual. In the games involving contexts of social conflicts represented by the prisoners' dilemma game, the experiments yields outcomes quite different from what are predicted by the conventional wisdom. In order to fill this gap between the conventional Nash Equilibrium and experimental outcomes, non-selfish (or other-regarding) motives of human behavior are introduced and then a new equilibrium concept, RAE-equilibrium is developed. It is also proved that an RAE-equilibrium exists under quite general conditions. Then it is applied to the prisoners' dilemma game that some of the experimental outcomes can be explained.
Interleukin-4 and tumor necrosis factor-alpha levels in children with febrile seizures
Ha, Jongseok,Choi, Jieun,Kwon, Aram,Kim, Kyungmin,Kim, Soo-Jin,Bae, Sun Hwan,Son, Jae Sung,Kim, Soo-Nyung,Kwak, Byung Ok,Lee, Ran Elsevier 2018 SEIZURE Vol.58 No.-
<P><B>Abstract</B></P> <P><B>Purpose</B></P> <P>The pathophysiology of febrile seizures remains unclear. Cytokines have been suggested to play a role in the pathogenesis of febrile seizures. We compared TNF-α and IL-4 levels in patients with febrile seizure (FS) with those in controls and identified the relationship between cytokines and various other factors.</P> <P><B>Method</B></P> <P>Fifty FS patients who visited Konkuk University Hospital from December 2015 to December 2016 were included. Thirty-nine patients who had fever without seizures were enrolled as the control group. Serum samples from febrile patients with a history of febrile seizures without present seizures (FPH) (N = 12) and from the afebrile seizure (AF) group (N = 13) were also analyzed. In the FS group, we compared cytokine levels among patients stratified by sex, family history, seizure recurrence, duration of seizure and serum lactate levels.</P> <P><B>Results</B></P> <P>The median serum TNF-α level in the FS group (19.54 pg/mL) was significantly higher than that in the control group (15.86 pg/mL). Higher median serum IL-4 levels were detected in the FS group (3.38 pg/mL) than in the control group (3.30 pg/mL). In the FS group, the serum IL-4 and TNF-α levels correlated with seizure recurrence and serum lactate levels, but they did not correlate with family history, duration of seizures or sex.</P> <P><B>Conclusions</B></P> <P>Our study supports the hypothesis that TNF-α production is involved in the pathogenesis of febrile seizures. IL-4 is believed to be involved in the pathogenesis of febrile seizures. The number of seizures and lactate levels were correlated with IL-4 and TNF-α levels.</P> <P><B>Highlights</B></P> <P> <UL> <LI> The pathophysiology of febrile seizure (FS) is not yet defined. </LI> <LI> Cytokines have been suggested to play a role in the pathogenesis of FS. </LI> <LI> TNF-α and IL-4 levels were associated with the pathogenesis of FS in the present study. </LI> </UL> </P>
배관표 ( Bae Kwanpyo ),박종석 ( Bak Jongseok ) 한국행정사학회 2021 韓國行政史學誌 Vol.51 No.-
1970년대 한국은 공업단지를 개발하여 비교우위를 구축(construct)하는 중화학공업화 정책으로 산업구조를 고도화시켰다. 이 연구는 정치인이 아닌 관료들이 어떻게 전례없는 중화학공업화 정책을 만들 수 있었는지를 고찰하는 연구이다. 분석결과는 다음과 같다. 1960년대에 경제기획원과 상공부가 함께 발전하며 조직간 가외성이 발생했다. 중화학공업 투자 유치 방안을 구체화하는 과정에서 경제기획원과 상공부 관료들이 정책대안을 놓고 경쟁했으며, 그 과정에서 공업단지를 통해 국내 민간자본의 투자를 유도하는 중화학공업화 정책대안이 만들어졌다. 따라서 한국의 중화학공업화 정책은 조직간 가외성, 관료들의 정책대안 경쟁 그리고 정책대안의 점진적 형성을 거쳐 출현하였으며, 이는 A. Wildavsky가 말하는 상호작용(interaction)으로 정책이 형성된 것이라고 평가할 수 있겠다. 이 연구는 그동안 소홀히 다뤄졌던 정치인이 아닌 관료들의 정책형성에 초점을 맞췄다는 점에서 이론적 의의를 지니며, 관료들이 성공적인 정책을 만들어내려면 필요한 조건들 가운데 하나를 제시한다는 점에서 정책적 함의를 지닌다. In the 1970s, South Korea advanced its industrial structure by implementing policies for heavy and chemical industrialization which were optimized for then-newly-built industrial complexes. This study examines how South Korean bureaucrats at that times were able to create such unprecedented policies for heavy and chemical industrialization. The analysis results are as follows: In the 1960s, the Economic Planning Board and the Ministry of Commerce and Industry developed together, resulting in redundancy between these organizations. The Economic Planning Board and the Ministry of Commerce and Industry officials competed with each other over plans to attract investment in heavy and chemical industries, and in the process, concrete policies to atract private investments by developing industrial complexes were created. In conclusion, South Korea's policies for heavy and chemical industrialization in 1970s were created through redundancy between concerned governmental organizations, long-standing competitions among concerned bureaucrats, and gradual formations of policy alternatives. And it can be evaluated that the policies was formed by the interactions which A. Wildavsky pointed. This study has theoretical significance because it focuses on the policy formations by bureaucrats, and has policy implication because it presents one of the conditions for creating successful policies by bureaucrats.
CMOS Power Amplifier Integrated Circuit With Dual-Mode Supply Modulator for Mobile Terminals
Junghyun Ham,Jongseok Bae,Hyungchul Kim,Mincheol Seo,Hwiseob Lee,Keum Cheol Hwang,Kang-Yoon Lee,Cheon-seok Park,Deukhyoun Heo,Youngoo Yang IEEE 2016 IEEE Transactions on Circuits and Systems I: Regul Vol.63 No.1
<P>A CMOS power amplifier integrated circuit with an optimized dual-mode supply modulator is presented. The dual-mode supplymodulator, based on a hybrid buck converter consisting of a wideband linear amplifier and a highly efficient switching amplifier, provides two operation modes: envelope tracking (ET) for high average output power and average power tracking (APT) for low output power. For the APT mode, the linear amplifier is switched off and the switching amplifier operates as a normal buck converter to supply DC voltage to the power amplifier according to the average output power. The optimum switch sizes of the switching amplifier were analyzed and applied for each operation mode for higher efficiency. An integrated circuit with a power amplifier and the dual-mode supply modulator was designed and fabricated using a 0.18-mu m CMOS process for LTE applications at a frequency of 0.78 GHz. For the 16-QAM uplink LTE signal, the measured efficiency with an ET mode is as high as 45.4%, which is 7.0% higher than that from the stand-alone power amplifier at an average output power of 24 dBm. An efficiency of 14.1% was achieved with an APT mode at an average output power of 9 dBm. This is 3.2% higher than that with the ET mode.</P>