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Case Report : Imaging findings for intravascular large B-cell lymphoma of the liver
( Jungmin Bae ),( Hyo Keun Lim ),( Ha Young Park ) 대한간학회 2015 Clinical and Molecular Hepatology(대한간학회지) Vol.21 No.3
Intravascular large B-cell lymphoma (IVLBCL) is a rare subtype of extranodal diffuse large B-cell lymphoma that most commonly involves the central nervous system and skin. To our knowledge, no state-of-the art imaging findings have been reported for hepatic IVLBCL in the English literature. We report the first case of hepatic involvement of IVLBCL along with a literature review. (Clin Mol Hepatol 2015;21:295-299)
Hagyoul Bae,Hyojoon Seo,Sungwoo Jun,Hyunjun Choi,Jaeyeop Ahn,Junseok Hwang,Jungmin Lee,Oh, Saeroonter,Jong-Uk Bae,Sung-Jin Choi,Dae Hwan Kim,Dong Myong Kim IEEE 2014 IEEE transactions on electron devices Vol.61 No.10
<P>A sub-bandgap optoelectronic differential ideality factor technique is proposed for extraction of the intrinsic density-of-states (DOS) over the bandgap in amorphous semiconductor thin-film transistors (TFTs). In the proposed technique, the gate bias-dependent differential change in the difference of ideality factors (dAη(V<SUB>GS</SUB>)/dV<SUB>GS</SUB>) between dark and sub-bandgap photonic excitation condition is employed. With the sub-bandgap photons (hν <; E<SUB>g</SUB>), the photonic excitation of electrons is confined only from the localized DOS over the bandgap. We applied the proposed technique to a-InGaZnO TFTs with W/L = 50/25 μm/μm and extracted the energy distribution of the intrinsic DOS for the localized states over the bandgap.</P>
Jungmin Lee,Hagyoul Bae,Jun Seok Hwang,Jaeyeop Ahn,Jun Tae Jang,Jinsoo Yoon,Sung-Jin Choi,Dae Hwan Kim,Dong Myong Kim Institute of Electrical and Electronics Engineers 2015 IEEE transactions on electron devices Vol. No.
<P>We report a technique for separate extraction of extrinsic source/drain (S/D) resistances (R<SUB>Se</SUB>/R<SUB>De</SUB>) and gate bias (V<SUB>GS</SUB>)-dependent but channel length (L)-independent intrinsic source/drain (R<SUB>Si</SUB>/R<SUB>Di</SUB>) resistances for the overlap region in MOSFETs. For extraction of the overlap length (L<SUB>ov</SUB>) in the heavily doped S/D regions, an analytical capacitance model for the depletion region is employed with the gate-to-source and gate-to-drain capacitance-voltage (C<SUB>G-S</SUB>, C<SUB>G-D</SUB>) characteristics. After verifying the extracted overlap length through a 2-D technology computer-aided design simulation, we successfully extract V<SUB>GS</SUB>-dependent R<SUB>Si</SUB> = 0.9~3.7 Ω and R<SUB>Di</SUB> = 1.0~3.9 Ω in an n-channel MOSFET with W = 140 μm and L = 0.35 μm. In addition, V<SUB>GS</SUB>- and L-independent extrinsic S/D resistances are separately extracted to be R<SUB>Se</SUB> = 5.1 Ω and R<SUB>De</SUB> = 5.0 Ω, respectively.</P>
Visual Discomfort and Visual Fatigue
Jungmin Han,Seon Hee Bae,Hyeon-Jeong Suk 대한인간공학회 2017 大韓人間工學會誌 Vol.36 No.4
Objective: This study aims to evaluate visual discomfort and visual fatigue caused by watching HMD and smartphones by conducting both subjective and objective measure. Background: With the rapid development of mobile Head-Mounted Display (HMD), the problem of visual discomfort and visual fatigue caused by watching Virtual Reality (VR) contents became a crucial concern for consumers and manufacturers, especially given that the casing of mobile HMD keeps the phone at a specified distance from the lenses that is close to the eyes. Method: Two smartphones were chosen for a preliminary study: LG G5 and Galaxy S7. As for a main study, iPhone 6S and Galaxy S7 were used. After being exposed to the selected clips, participants were asked to answer Simulator Sickness Questionnaire (SSQ) and went through optometric tests that measure tear break-up time, spherical equivalent, and contrast sensitivity. Results: The subjective assessments indicate that HMD causes more visual discomfort compared to watching a smartphone. Furthermore, the experimental result confirms that watching a HMD causes more eye dryness compared to smartphones. Conclusion: The result of the study compared visual discomfort and visual fatigue of two different displays, HMD and smartphone, and confirmed that watching HMD causes more visual discomfort and visual fatigue. Application: Ultimately, this study could help manufacturers understand the strengths and weaknesses of different display forms, providing guidance for an effective application of HMD.
양측 급성 음향외상의 임상양상 및 치료결과의 개인별 이질성
안정민 ( Jungmin Ahn ),한지혁 ( Ji Hyuk Han ),배문정 ( Mun Jung Bae ) 국군의무사령부 2020 대한군진의학학술지 Vol.51 No.1
Objective: To analyze individual heterogeneity in susceptibility to noise using within-subject comparison of hearing outcomes following medical therapy for bilateral acute acoustic trauma (AAT). Method: Twelve patients with bilateral hearing loss after gunshot noise exposure during military training were enrolled. Pure tone audiometry, to measure pure-tone averages (PTA) at 2000, 4.000, and 8000 Hz, was performed in all patients at their initial visit and one month after treatment with oral corticosteroids. Results: The initial mean hearing level was 46.67 ± 12.0 dB for the right ear, 52.92 ± 11.15 dB for the left, and 49.79 ± 11.77 dB for both ears. In the 1-month follow-up, the mean PTA was 35.42 ± 15.19 dB for the right ear, 43.06 ± 15.92 dB for the left, and 39.24 ± 15.71 dB for both ears. The difference in PTA between the right and left ears during the initial visit was markedly correlated with the difference in PTA between both ears during the 1-month follow-up (rho = 0.814, р = 0.001). In addition, the average hearing gain on the right side showed a strong correlation with that on the left side (rho = 0.736, p = 0.006). However, there was no relationship between the initial hearing threshold and the degree of hearing gain when both ears were considered together. Conclusion: We detected the positive effects of steroid treatment for AAT and demonstrated clinical evidence of individual susceptibility to acoustic trauma.
배상홍(Sanghong Bae),임봉기(Bonggi Lim),조정민(Jungmin Cho) 한국자동차공학회 2023 한국자동차공학회 학술대회 및 전시회 Vol.2023 No.11
In this paper, we propose a logic to improve the phenomenon of steering wheel torque variation when the RWS system is operated. General control strategies for RWS system are well known for out-of-phase control to improve steering convenience at low speeds and in-phase control to increase vehicle stability at mid-high speeds. The steering torque of the front wheels increases when the RWS system is controlled in-phase, and the steering torque decreases when the out-of-phase is controlled. The compensation logic compensates for the torque variation in the steering wheel to provide a constant steering torque to the driver. Tests have been conducted through the actual vehicle with compensation logic to verify the effectiveness of the logic, and based on these results, it has been confirmed that the performance of the vehicle is improved.