Search results for: Jun Seok Kim

Items from 1 to 20 out of 80 results

article

Li Intercalation Effects on Interface Resistances of High‐Speed and Low‐Power WSe₂ Field‐Effect Transistors

Yong Seon Shin, Kiyoung Lee, Dinh Loc Duong, Jun Seok Kim, more

Advanced Functional Materials > 30 > 45 > n/a - n/a

Van der Waals (vdW) layered materials are promising channel materials for next‐generation field‐effect transistors (FETs). However, in vdW layered‐material FETs, the Schottky barrier and tunnel barrier at the vdW interfaces significantly reduce the electron injection efficiencies at electrical contacts, thereby limiting the development of high‐speed and low‐power FETs. This study demonstrates that...

article

Effects of poloxamer‐based thermo‐sensitive sol–gel agent on urethral stricture after transurethral resection of the prostate for benign prostatic hyperplasia: a multicentre, single‐blinded, randomised controlled trial

Jae Hoon Chung, Kyu Shik Kim, Jae Duck Choi, Tae Hyo Kim, more

BJU International > 125 > 1 > 160 - 167

Objective To evaluate the effectiveness of poloxamer‐based thermo‐sensitive sol–gel instillation, after transurethral resection of the prostate (TURP), for preventing urethral stricture. Patients and Methods In all, 198 patients underwent TURP for benign prostatic hyperplasia. Recruited patients were randomly divided into two groups: groups A and B. Patients in Group A (100 patients, experimental...

article

Enhanced interaction in the polyimide/sepiolite hybrid films via acid activating and polydopamine coating of sepiolite

Jun‐Seok Kim, Myeon‐Cheon Choi, Keuk‐Min Jeong, Gue‐Hyun Kim, more

Polymers for Advanced Technologies > 29 > 5 > 1404 - 1413

We aimed at enhancing interaction in the polyimide/sepiolite hybrid films with the loading of sepiolite in the polyimide matrix ranged from 0 to 8 wt% via acid activating and polydopamine doping. First, sepiolite was treated with a 3M HCl solution under reflux conditions. Then the acid‐activated sepiolite was coated by mussel‐inspired polydopamine under alkaline conditions. The coated polydopamine...

article

High-Efficiency Two-Stage Three-Level Grid-Connected Photovoltaic Inverter

Jun-Seok Kim, Jung-Min Kwon, Bong-Hwan Kwon

IEEE Transactions on Industrial Electronics > 2018 > 65 > 3 > 2368 - 2377

This paper proposes a high-efficiency two-stage three-level grid-connected photovoltaic (PV) inverter. The proposed two-stage inverter comprises a three-level step-up converter and a three-level inverter. The three-level step-up converter not only improves the power-conversion efficiency by lowering the voltage stress but also guarantees the balancing of the dc-link capacitor voltages using a simple...

article

Utilization of agricultural residues for enhancement of cellulolytic enzyme production and enzymatic saccharification by Trichoderma harzianum KUC1716

Hanbyul Lee, Young Min Lee, Young Mok Heo, Jaejung Lee, more

Industrial Crops and Products > 2017 > 109 > C > 185-191

Agricultural residues are a potentially economical and eco-friendly source for second-generation ethanol production. In the present study, efficient cellulolytic enzyme production was studied using agricultural residues as a carbon source. Four types of agricultural residues were evaluated as carbon sources for Trichoderma harzianum KUC1716. Barley straw was identified as the optimal carbon source...

article

RORα Induces KLF4-Mediated M2 Polarization in the Liver Macrophages that Protect against Nonalcoholic Steatohepatitis

Yong-Hyun Han, Hyeon-Ji Kim, Hyelin Na, Min-Woo Nam, more

Cell Reports > 2017 > 20 > 1 > 124-135

The regulation of M1/M2 polarization in liver macrophages is closely associated with the progression of nonalcoholic steatohepatitis (NASH); however, the mechanism involved in this process remains unclear. Here, we describe the orphan nuclear receptor retinoic-acid-related orphan receptor α (RORα) as a key regulator of M1/M2 polarization in hepatic residential Kupffer cells (KCs) and infiltrated monocyte-derived...

article

MP02-14 FIRST POST-VOID RESIDUAL URINE VOLUME FOLLOWING HOLMIUM LASER ENUCLEATION OF THE PROSTATE: PREDICTOR OF DE NOVO URINARY INCONTINENCE

Jun Seok Kim, Dong Hoon Yoo, Dong Hoon Lim, Myung Ki Kim, more

The Journal of Urology > 2017 > 197 > 4(S) > e15-e16

article

MP63-12 RELIABILITY OF VALSALVA LEAK POINT PRESSURE IN FEMALE STRESS URINARY INCONTINENCE

Jun Seok Kim, Dong Hoon Yoo, Dong Hoon Lim, Myung Ki Kim, more

The Journal of Urology > 2017 > 197 > 4(S) > e840

article

High-Efficiency Bridgeless Three-Level Power Factor Correction Rectifier

Jun-Seok Kim, Sung-Ho Lee, Woo-Jun Cha, Bong-Hwan Kwon

IEEE Transactions on Industrial Electronics > 2017 > 64 > 2 > 1130 - 1136

A high-efficiency bridgeless three-level power factor correction (PFC) rectifier is proposed. The circuit configuration of the proposed rectifier consists of four metal oxide semiconductor field-effect transistor (MOSFET) switches, and the reverse recovery problems of the switches are eliminated. Also, the proposed rectifier with three voltage levels reduces the power losses, harmonic components,...

chapter

Money extraction and normalization from texts

Young-Seob Jeong, Joong-Hwi Shin, Hyoung-Gyu Lee, Ying-Xiu Quan, more

2017 IEEE International Conference on Big Data and Smart Computing (BigComp) > 427 - 429

2017 IEEE International Conference on Big Data and Smart Computing (BigComp)

Documents contain various types of information, and money information is one of such information. In the sentence “He borrowed ten dollars from me”, the expression ‘ten dollars’ conveys important information. When it is normalized into a specific way (e.g., 10 USD), then it can be used to develop various applications: Question-Answering (QA) system or Dialog system. In this paper, we propose an annotation...

chapter

4.1 A 640×480 dynamic vision sensor with a 9µm pixel and 300Meps address-event representation

Bongki Son, Yunjae Suh, Sungho Kim, Heejae Jung, more

2017 IEEE International Solid-State Circuits Conference (ISSCC) > 66 - 67

2017 IEEE International Solid- State Circuits Conference - (ISSCC)

We report a VGA dynamic vision sensor (DVS) with a 9µm pixel, developed through a digital as well as an analog implementation. DVS systems in the literature try to increase spatial resolution up to QVGA [1–2] and data rates up to 50 million events per second (Meps) (self-acknowledged) [3], but they are still inadequate for high-performance applications such as gesture recognition, drones, automotive,...

article

Effect of organosolv pretreatment on mechanically pretreated biomass by use of concentrated ethanol as the solvent

Yong Cheol Park, Tae Hyun Kim, Jun Seok Kim

Biotechnology and Bioprocess Engineering > 2017 > 22 > 4 > 431-439

In this study, we determined the effect of organosolv pretreatment on herbaceous biomasses corn stover and wheat straw, by using high-concentration ethanol as the solvent. A high-concentration of ethanol allows for the easy reuse and recycling of the solvent. First, we tested the effects of ethanol pretreatments at 60 and 99.5% (w/w) and found that highest solvent concentration resulted in low glucose...

article

Pretreatment of Helianthus tuberosus residue by flow-through process for production of fermentable sugar

Yong Cheol Park, Jun Seok Kim

Korean Journal of Chemical Engineering > 2017 > 34 > 2 > 346-352

The pretreatment of Helianthus tuberosus residue was studied for fermentable sugar production. The pretreatment was performed by varying the temperature, type of chemical solution, and concentration. Two different catalytic pretreatments using sulfuric acid and aqueous ammonia were operated and compared in a flow-through column reactor system. The flow-through process was required to increase the...

article

Principal curve-based monitoring chart for anomaly detection of non-linear process signals

Seung Hwan Park, Cheong-Sool Park, Jun-Seok Kim, Jun-Geol Baek

The International Journal of Advanced Manufacturing Technology > 2017 > 90 > 9-12 > 3523-3531

This study proposes a monitoring chart for anomaly detection of non-linear process signals generated by semiconductor manufacturing processes. In these manufacturing processes, fault detection and classification (FDC) and statistical process control (SPC) have been established as fundamental techniques to improve production efficiency and yield. Non-linear process signals are collected through automatic...

article

Assembly processes of moss and lichen community with snow melting at the coastal region of the Barton Peninsula, maritime Antarctic

Seok Cheol Kim, Jun Seok Kim, Bo Ram Hong, Soon Gyu Hong, more

Journal of Ecology and Environment > 2016 > 40 > 1 > 1-11

Background In this article, it was analyzed how snow melting affects the assembly of lichen and moss communities in a small area of the coastal region of Barton Peninsula, which is in maritime Antarctic. In the small area, even though there is a huge gap of difference of the environment between the snow-filled area and snow-melt one, the latter did not have distinctive environmental gradients. Results...

article

Role of CRTC2 in the control of glucose metabolism

Hye-Sook Han, Byeong Hun Choi, Jun Seok Kim, Geon Kang, more

Diabetes Research and Clinical Practice > 2016 > 120 > S1 > S26

article

MP27-11 IS PREOPERATIVE CHRONIC KIDNEY DISEASE STATUS ASSOCIATED WITH ONCOLOGIC OUTCOMES IN UPPER URINARY TRACT UROTHELIAL CARCINOMA?: A MULTICENTER PROPENSITY SCORE MATCHED ANALYSIS

Ho Seok Chung, Eu Chang Hwang, Seung Il Jung, Taek Won Kang, more

The Journal of Urology > 2016 > 195 > 4(S) > e366-e367

article

Understanding the Physicochemical Characteristics and the Improved Enzymatic Saccharification of Corn Stover Pretreated with Aqueous and Gaseous Ammonia

Chang Geun Yoo, Hoon Kim, Fachuang Lu, Ali Azarpira, more

BioEnergy Research > 2016 > 9 > 1 > 67-76

Physicochemical characteristics of corn stover pretreated by soaking in aqueous ammonia (SAA) and low-moisture anhydrous ammonia (LMAA) were compared and investigated. The glucan digestibility of the treated biomass reached 90 % (SAA) and 84 % (LMAA). The LMAA pretreatment enhanced the digestibility by cleaving cross-linkages between cell wall components, whereas the SAA pretreatment additionally...

article

A review on alkaline pretreatment technology for bioconversion of lignocellulosic biomass

Jun Seok Kim, Y.Y. Lee, Tae Hyun Kim

Bioresource Technology > 2016 > 199 > C > 42-48

The native form of lignocellulosic biomass is resistant to enzymatic breakdown. A well-designed pretreatment that can promote enzymatic hydrolysis of biomass with reasonable processing cost is therefore necessary. To this end, a number of different types of pretreatment technologies have been developed with a common goal of making biomass more susceptible to enzymatic saccharification. Among those,...

chapter

Application of nonlinear complementary filters to human motion analysis

Kyungsoo Kim, Jun Seok Kim, Young Joon Kim

2015 17th International Conference on E-health Networking, Application & Services (HealthCom) > 594 - 595

2015 17th International Conference on E-health Networking, Application & Services (HealthCom)

Analyzing human motion has involved the use of the Kalman filter for calculating the orientation of the inertial measurement unit (IMU), based on many current motion analysis systems. However, its pitfalls, including high computation costs and difficult implementation renders itself sub-optimal in the clinical environment. Meanwhile, a filter developed by Mahony et al., which was developed for vehicular...

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INFONA - science communication portal

Search results for: Jun Seok Kim

Li Intercalation Effects on Interface Resistances of High‐Speed and Low‐Power WSe₂ Field‐Effect Transistors

Effects of poloxamer‐based thermo‐sensitive sol–gel agent on urethral stricture after transurethral resection of the prostate for benign prostatic hyperplasia: a multicentre, single‐blinded, randomised controlled trial

Enhanced interaction in the polyimide/sepiolite hybrid films via acid activating and polydopamine coating of sepiolite

High-Efficiency Two-Stage Three-Level Grid-Connected Photovoltaic Inverter

Utilization of agricultural residues for enhancement of cellulolytic enzyme production and enzymatic saccharification by Trichoderma harzianum KUC1716

RORα Induces KLF4-Mediated M2 Polarization in the Liver Macrophages that Protect against Nonalcoholic Steatohepatitis

MP02-14 FIRST POST-VOID RESIDUAL URINE VOLUME FOLLOWING HOLMIUM LASER ENUCLEATION OF THE PROSTATE: PREDICTOR OF DE NOVO URINARY INCONTINENCE

MP63-12 RELIABILITY OF VALSALVA LEAK POINT PRESSURE IN FEMALE STRESS URINARY INCONTINENCE

High-Efficiency Bridgeless Three-Level Power Factor Correction Rectifier

Money extraction and normalization from texts

4.1 A 640×480 dynamic vision sensor with a 9µm pixel and 300Meps address-event representation

Effect of organosolv pretreatment on mechanically pretreated biomass by use of concentrated ethanol as the solvent

Pretreatment of Helianthus tuberosus residue by flow-through process for production of fermentable sugar

Principal curve-based monitoring chart for anomaly detection of non-linear process signals

Assembly processes of moss and lichen community with snow melting at the coastal region of the Barton Peninsula, maritime Antarctic

Role of CRTC2 in the control of glucose metabolism

MP27-11 IS PREOPERATIVE CHRONIC KIDNEY DISEASE STATUS ASSOCIATED WITH ONCOLOGIC OUTCOMES IN UPPER URINARY TRACT UROTHELIAL CARCINOMA?: A MULTICENTER PROPENSITY SCORE MATCHED ANALYSIS

Understanding the Physicochemical Characteristics and the Improved Enzymatic Saccharification of Corn Stover Pretreated with Aqueous and Gaseous Ammonia

A review on alkaline pretreatment technology for bioconversion of lignocellulosic biomass

Application of nonlinear complementary filters to human motion analysis

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