Polysulfone으로 Al(OH)₃를 고정화한 PSf-Al(OH)₃ 비드에 의한 불소 이온의 제거 특성

전진우,이민규,Jeon, Jin-Woo,Lee, Min-Gyu 한국청정기술학회 2014 청정기술 Vol.20 No.1

In this study, PSf-$Al(OH)_3$ beads were prepared by immobilizating aluminum hydroxide $Al(OH)_3$ with polysulfone (PSf). The removal experiments of the fluoride ions by PSf-$Al(OH)_3$ beads were conducted batchwise and the parameters such as pH, initial fluoride concentration, and coexisting ions were investigated. The maximum removal capacity obtained from Langmuir isotherm was 52.4 mg/g and the optimum pH region of fluoride ions was in the range of 4 to 10. The removal process of fluoride ions by PSf-$Al(OH)_3$ beads was found to be controlled by both external mass transfer at the earlier stage followed by internal diffusion at the later stage. The presence of coexisting anions such as $HCO_3{^-}$, $SO{_4}^{2-}$, $NO_3{^-}$, and $Cl^-$ had a negative effect on removal of fluoride ions by PSf-$Al(OH)_3$ beads. 본 연구에서는 폴리술폰(polysulfone, PSf)으로 알루미늄 수산화물(aluminum hydroxide, $Al(OH)_3$)을 고정화한 PSf-$Al(OH)_3$ 비드를 제조하였다. 제조한 PSf-$Al(OH)_3$ 비드에 의한 불소 이온 제거실험은 회분식으로 수행하였으며, pH, 초기농도, 공존이온과 같은 변수들의 영향을 살펴보았다. Langmuir 등온식으로 구한 불소 이온의 최대 제거량은 52.4 mg/g이었으며, 최적 pH 범위는 4~10이었다. PSf-$Al(OH)_3$ 비드에 의한 불소 이온의 제거과정은 전 단계에서 외부물질전달이 나중 단계에서 내부확산이 지배인 것을 알 수 있었다. 또한 PSf-$Al(OH)_3$에 의한 불소 이온의 제거에서 $HCO_3{^-}$, $SO{_4}^{2-}$, $NO_3{^-}$, $Cl^-$와 같은 공존 음이온들은 불소 이온의 제거에 방해를 하는 것으로 나타났다.

Isolation of Photobacterium Damselae Subsp. Damselae from the Giant Grouper, Epinephelus Lanceolatus

전진우,김지형,한지은,신상필,데니스 고메즈,카시아노 허모피아,오규선,박세창 한국임상수의학회 2010 한국임상수의학회지 Vol.27 No.5

A giant grouper (Epinephelus lanceolatus) that was reared for public exhibition in a private commercial aquarium in Seoul, Korea, was recently found dead. The fish had evidenced symptoms including anorexia, lethargy,and depression persisting for two weeks. A bacterial pathogen from fish organs (kidney, liver, spleen) was cultured,identified and confirmed as Photobacterium damselae subsp. damselae, using a Vitek System 2, API 20E test, multiplex PCR, and 16S rRNA gene sequencing. In this paper, we have described the isolation and identification of Photobacterium damselae subsp. damselae from a giant grouper reared in a private aquarium in Korea.

A DC-DC Converter with Voltage-Mode PWM Control

전진우,김철우 한국과학기술원 반도체설계교육센터 2019 IDEC Journal of Integrated Circuits and Systems Vol.5 No.3

- In this paper, a voltage-mode PWM controlled buck converter is addressed. It consists of a pair of fullyintegrated switches, an LC filter, a type 3 compensation loop, an internal ramp & clock generator, and a dead-time generator. A portion of output is taken with a resistive divider and subtracted from an external reference voltage to generate an error voltage. Then the error voltage is compared with a ramp signal, creating a PWM signal for controlling high-side and low-side switches. This buck converter is fabricated in 0.18-μm CMOS process and area of control block is 0.28 mm2. Input voltage is 3.3 V and target output voltage is 1.8 V. Peak measured power conversion efficiency is 94.38% at 150 mA constant load condition. In a load transient testing from 100 mA to 300 mA, overshoot settling time measures 17.44 us. Overshoot magnitude is 68 mV and undershoot settling time and magnitude is 8.56 us and 60.8 mV, respectively.

Squeezing Effect on Superdense Coding Through a Generalized Amplitude Damping Multi-Qubit Channel

전진우 한국물리학회 2010 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.56 No.1

Using the theory of quantum trajectories, we study the classical capacity C of an amplitude damping multi-qubit channel interacting with a squeezed thermal bath in the superdense coding protocol. We generalize the Krauss operators for the corresponding single-qubit channel to the multi-qubit situation. Our numerical results confirm that the squeezing suppresses the decay rate of quantum coherence, leading to a preservation of nonclassical effects.

[핀란드 여행기] 걷기와 수영, 생각의 3일

전진우 메이데이 2024 Paper Vol.268 No.-

경찰의 독자적 수사권 행사에 대한 국민의 지지에 영향을 미치는 요인

전진우,나종민 경찰대학 치안정책연구소 2024 치안정책연구 Vol.38 No.1

최근 검·경 수사권 조정 및 일련의 사건 처리 과정에서 드러난 국민의 경찰에 대한 불신을 해소하고 중차대한 수사구조의 변화에 대응하는 중장기적 전략을 체계적으로 수립하기 위해서는 전통적으로 중시해 오던 경찰활동의 효과성뿐만 아니라 최근 강조되는 절차적 공정성에 대한 인식을 어떻게 제고하고 이를 토대로 국민들의 자발적인 순응과 협조 및 지지를 이끌어낼 것인지에 대한 고민이 필수적이다. 이에 본 연구는 수도권에 거주하는 1,621명의 성인남녀를 대상으로 실시한 온라인 설문조사 결과를 이용하여 다중회귀분석과 경로분석을 통해 경찰활동에 대한 효과성과 절차적 공정성 인식이 경찰의 독자적인 수사권 행사라는 경찰 주요 시책의 지지에 미치는 영향을 분석하고, 경찰 신뢰가 이를 매개하는 효과를 검증하였다. 연구결과 효과성과 절차적 공정성 인식은 모두 경찰 신뢰도 및 경찰 독자적 수사권 행사에 대한 지지에 양(+)의 영향을 미치는 것으로 나타났고, 특히 절차적 공정성은 효과성보다 경찰 신뢰도에 더 큰 영향을 미치는 것으로 드러났다. 또한 효과성은 경찰 신뢰를 완전 매개, 절차적 공정성은 경찰 신뢰를 부분 매개하여 경찰 수사권 지지에 영향을 미치는 것으로 나타났다. 위 연구결과들을 통해 경찰이 향후 주요 추진시책에 대한 범국민적 신뢰와 지지를 확보하기 위해서는 효과성외에도 절차적 공정성에 대한 국민의 인식을 균형있게 제고할 필요가 있음을 제안하였다. To resolve the deep-seated public distrust and develop strategic plans to cope with the fundamental changes in the investigative structure, the police need to think about how to improve police legitimacy and secure voluntary compliance, cooperation, and support from the citizens. Drawing on the online survey of the adults residing in the capital areas of South Korea (n=1,621), this study conducted a multiple OLS regression and path analyses to explore the effect of police effectiveness and procedural fairness on the citizen’s support for the independent power and authority in police investigation, as well as the mediating effect of police trustworthiness. The results suggest that both effectiveness and procedural fairness are important predictors of police trustworthiness and support for the independent investigative power of the police. Interestingly, procedural fairness has a greater impact on the police trustworthiness than effectiveness as often observed in the studies conducted based on the Western developed countries. Also, police trustworthiness either fully or at least partially mediated the effect of both predictors on the outcome. These results imply that police need to put emphasis on not just the effectiveness for which the police have long strive, but also the procedural fairness that recently gaining attentions from both scholars and practitioners to better secure the citizen’s trust and support for the major policy goals the police seeks to achieve.

떠오르는 로봇산업 현황 및 시사점

전진우 산업연구원 2018 월간 KIET 산업경제 Vol.- No.237

Arowana(Scleropages formosus)에서 Hemolysin Gene을 지닌 Aeromonas sobria 분리 및 특성

전진우,김지형,카시아노 허모피아,신상필,한지은,박세창 한국임상수의학회 2010 한국임상수의학회지 Vol.27 No.1

Arowana (Scleropages formosus) is the most valuable group of ornamental fishes and very much in demand in the ornamental fish trade and commands high price ranging from hundreds to thousands of dollars per fish. In this paper, we described a case of mortality of arowana from a private aquarium in Korea. A bacterial pathogen from fish organs (brain, kidney, liver) was cultured, identified and confirmed using Vitek System 2, API 20E test, multiplex PCR and 16S rRNA gene sequencing. The morphological and biochemical properties of the bacterium isolated from the brain, kidney and liver of the fish were similar to Aeromonas sobria. Positive amplification products using the multiplex PCR assay for detection of A. sobria were obtained from these organs. The 16S rRNA gene of the isolates from fish was identical and exhibited 100% sequence similarity with A. sobria (AY987762.1) strain available from GenBank. This bacterium contained hemolysin gene, a virulence factor that plays an important role in outbreaks of disease and is pathogenic to humans as well as in fish. Although this opportunistic bacterium was isolated from a fish without any external symptoms, this pathogen may act as a reservoir and enhance chances of zoonosis to human such as during handling.

Dynamical Localization and Environmental Noise: a Quantum Trajectory Approach

전진우 한국물리학회 2007 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.51 No.5

Using the quantum trajectory approach, we study the effects of environmental noise on dynamical localization in a quantum algorithm simulating the kicked rotator. We apply two models that generalize single qubit noisy channels, like phase flip and amplitude damping, to the many-qubit situation. Our numerical results show that the quantum trajectory approach is suitable for simulating the quantum kicked rotator in realistic environments.

디지털경제 시대의 로봇서비스 가치

전진우 산업연구원 2022 월간 KIET 산업경제 Vol.- No.285