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Experimental Characterization-Based Signal Integrity Verification of Sub-Micron VLSI Interconnects
Eo, Yung-Seon,Park, Young-Jun,Kim, Yong-Ju,Jeong, Ju-Young,Kwon, Oh-Kyong The Korean Institute of Electrical Engineers 1997 Journal of Electrical Engineering and Information Vol.2 No.5
Interconnect characterization on a wafer level was performed. Test patterns for single, two-coupled, and triple-coupled lines ere designed by using 0.5$\mu\textrm{m}$ CMOS process. Then interconnect capacitances and resistances were experimentally extracted by using tow port network measurements, Particularly to eliminate parasitic effects, the Y-parameter de-embedding was performed with specially designed de-embedding patterns. Also, for the purpose of comparisons, capacitance matrices were calculated by using the existing CAD model and field-solver-based commercial simulator, METAL and MEDICI. This work experimentally verifies that existing CAD models or parameter extraction may have large deviation from real values. The signal transient simulation with the experimental data and other methodologies such as field-solver-based simulation and existing model was performed. as expected, the significantly affect on the signal delay and crosstalk. The signal delay due to interconnects dominates the sub-micron-based a gate delay (e.g., inverter). Particularly, coupling capacitance deviation is so large (about more than 45% in the worst case) that signal integrity cannot e guaranteed with the existing methodologies. The characterization methodologies of this paper can be very usefully employed for the signal integrity verification or he electrical design rule establishments of IC interconnects in the industry.
Experimental Characterization-Based Signal Integrity Verification of Sub-Micron VLSI Interconnects
Yung-seon Eo,Young-jun Park,Yong-ju Kim,Ju-Young Jeong,Oh-Kyong Kwon 한국정보과학회 1997 Journal of Electrical Engineering and Information Vol.2 No.5
Interconnect characterization on a wafer level was performed. Test patterns for single, two-coupled, and triple-coupled lines were designed by using O.5um CMOS process. Then interconnect capacitances and resistances were experimentally extracted by using two port network measurements. Particularly to eliminate parasitic effects, the Y-parameter de-embedding was performed with specially designed de-embedding patterns. Also, for the purpose of comparisons, capacitance matrices were calculated by using the existing CAD model and field-solver-based commercial simulator, METAL and MEDICI. This work experimentally verifies that existing IC interconnect CAD models or parameter extraction may have large deviation from real values. The signal transient simulation with the experimental data and other methodologies such as field-solver-based simulation and existing models was performed. As expected, they significantly affect on the signal delay and crosstalk. The signal delay due to interconnects dominates the sub-micron-based gate delay (e.g., inverter). particularly, coupling capacitance deviation is so large (about more than 45% in the worst case) that signal integrity cannot be guaranteed with the existing methodologies. The characterization methodologies of this paper can be very usefully employed for the signal integrity verification or the electrical design rule establishments of IC interconnects in the industry.
Kezia Rachellea Mustakim(Kezia Rachellea Mustakim ),Mi Young Eo(Mi Young Eo),Ju Young Lee(Ju Young Lee),Mi Hyun Seo(Mi Hyun Seo),Soung Min Kim(Soung Min Kim) 대한구강악안면외과학회 2023 대한구강악안면외과학회지 Vol.49 No.2
Objectives: Suspending bisphosphonates (BPs) to reduce the risk and severity of medication-related osteonecrosis of the jaw (MRONJ) remains controversial. In this study, we quantitatively evaluated the clinical significance of BP suspension before surgery in osteoporosis patients with MRONJ. Materials and Methods: We analyzed 24 osteoporosis patients with MRONJ who were treated from 2012 to 2020 at Seoul National University Dental Hospital and compared the treatment outcomes of those who suspended BPs with those who did not. The number of surgical interventions, follow-up panoramic radiographs for relative bone density measurement, and laboratory blood tests including white blood cells, erythrocyte sedimentation rate, absolute neutrophil count, hemoglobin, hematocrit, and alkaline phosphatase were analyzed. ANOVA, Student’s t -test, and Mann–Whitney U tests were used to compare results. Fisher’s exact test was used to discover the association between treatment outcome and BP suspension, and Pearson’s correlation test was used to measure the statistical relationship between the changes in serum inflammatory markers. Results: The number of interventions was significantly higher in the non-drug suspension group due to recurrence (P<0.05). The relative bone density in patients who suspended BPs was significantly different over time (P<0.05), with the highest density at one-year follow-up. Fisher’s exact test shows an association between successful treatment outcomes and BP suspension. The alkaline phosphatase and erythrocyte sedimentation rate levels decreased significantly in the BP-suspended group, and a positive correlation was found between these elevated markers. Conclusion: A significant increase in bone density throughout follow-up and a lower number of interventions were found in the BP suspension group compared to the non-drug suspension group. Also, BP suspension decreased inflammatory markers in the serum after surgery, resulting in good treatment outcomes. BP suspension is a prognostic factor for MRONJ and should be implemented before surgery.
Guidance and rationale for the immediate implant placement in the maxillary molar
Kezia Rachellea Mustakim(Kezia Rachellea Mustakim ),Mi Young Eo(Mi Young Eo),Ju Young Lee(Ju Young Lee),Hoon Myoung(Hoon Myoung ),Mi Hyun Seo(Mi Hyun Seo),Soung Min Kim(Soung Min Kim) 대한구강악안면외과학회 2023 대한구강악안면외과학회지 Vol.49 No.1
Objectives: While the reliability of immediate implant placement in the maxillary molar has been discussed, its significance is questionable. There have been no guidelines for case selection and surgical technique for successful treatment outcomes of immediate maxillary molar implants. Therefore, in this study, we classified alveolar bone height and socket morphology of the maxillary molar to establish guidelines for immediate implant placement. Materials and Methods: From 2011 to 2019, we retrospectively analyzed 106 patients with 148 immediate implants at the Department of Oral and Maxillofacial Surgery, Seoul National University Dental Hospital. Inclusion and exclusion criteria were applied, and patient characteristics and treatment results were evaluated clinically and radiologically. Results: A total of 29 tapered, sand-blasted, large-grit, and acid-etched (SLA) surfaces of implants were placed in 26 patients. The mean patient age was 64.88 years. Two implants failed and were reinstalled, resulting in a 93.10% survival rate. Fluctuating marginal bone level changes indicating bone regeneration and bone loss were observed in the first year following installation and remained stable after one year of prosthesis loading, with an average bone loss of 0.01±0.01 mm on the distal side and 0.03±0.03 mm on the mesial side. Conclusion: This clinical study demonstrated the significance of immediate implant placement in maxillary molars as a reliable treatment with a high survival rate using tapered SLA implants. With an accurate approach to immediate implantation, surgical intervention and treatment time can be reduced, resulting in patient satisfaction and comfort.
FABRICATION OF CuInSe₂(CIS) THIN FILM SOLAR CELL VIA A NON-VACUUM PROCESS
Young-Joo Eo,Wonha Lee,Kyunhwan Kim,SeJin Ahn,Ara Cho,Jihye Gwak,Kyunghoon Yoon,Keeshik Shin,Seung Kyu Ahn,Jun Sik Cho,Ju Hyung Park,Jin Su Yu,Kihwan Kim,Se Youn Moon,Hyo Rim Jung,Jin Hyeok Kim,Jae Ho 한국신재생에너지학회 2014 AFORE Vol.2014 No.-
Ju-Kyeong Eo,Juo Choi,Seung Won Lee,Nam Young Kim 한국균학회 2022 韓國菌學會誌 Vol.50 No.4
Here, Podospora leporina was isolated and cultured from Cypripedium guttatum Sw. (spotted lady’s slipper), which was designated as an endangered wildlife class 1 by the Ministry of Environment. Further, Podospora sp., which is found in Calanthe discolor Lindl. (Japanese hardy orchid) root is recorded as an endophytic fungus in Jeju Island, Korea. However, there is no existing record of Podospora spp. Thus, in this study, we analyzed the morphological characteristics and two molecular markers, internal transcribed spacer (ITS) and large ribosomal subunit (LSU), of P. leporina and compared these data with other relative species. Consequently, this endophytic fungal species was confirmed as an unrecorded species in Korea, so we presented cultural characteristics and microstructures, such as the conidia of P. leporina.
운동선수의 월경곤란증이 월경주기에 따른 난소 및 스트레스호르몬 농도에 미치는 영향
권영우 ( Young Woo Kwon ),박승한 ( Seung Han Park ),류호상 ( Ho Sang Yoo ),이종삼 ( Jong Sam Lee ),양승환 ( Sung Hwan Yang ),오광진 ( Kwang Jin Oh ),김진해 ( Jin Hae Kim ),어수주 ( Su Ju Eo ),김진형 ( Jin Heung Kim ),권광선 ( Kwan 한국스포츠정책과학원(구 한국스포츠개발원) 2005 체육과학연구 Vol.16 No.4
이 연구는 운동선수의 월경곤란증이 생리주기(월경기, 분비기)에 따라 난소호르몬(estrogen, progesterone)과 스트레스호르몬 (cortisol, catecholamines에 미치는 영향을 규명하기 위한 것이다. 실험대상자는 21명을 대상으로 월경곤란증의 선수군(n=7), 월경곤란증이 없는 선수군(n=7), 대조군으로 월경곤란증이 없는 일반인 (n=7)으로 구성하였다. 분석결과 난소호르몬의 경우 전체적으로 월경기에 비하여 분비기 높은 수치를 보였으며(p<.001), 집단에 따른 차이는 없었다. 스트레스 호르몬인 cortisol과 epinephrine은 생리주기와 집단에 따른 차이나 변화가 없었다. 그렇지만 norepinephrine의 경우 월경곤란증을 가진 선수군의 월경기 수치가 분비기 수치보다 유의하게 낮았으며, 월경곤란증이 없는 선수군의 월경기 수치보다 유의하게 낮았다(p<.05). 이상의 결과를 요약하면 난소호르몬은 집단에 따른 차이나 변화가 없었으나, 스트레스 호르몬인 norepinephrine의 경우 월경기의 수치가 낮게 나타났다. 보다 명확한 연구의 구명을 위해서는 운동중과 운동형태와 강도, 월경곤란증 정도에 따른 추가적인 연구가 요망된다. The purpose of this study was to investigate the effect of dysmenorrhea on the circulating concentration of ovarian hormone (estrogen, progesterone), cortisol and catecholamines (epinephrine, norepinephrine) during menstrual cycle in athletes. Twelve one females participated in this investigation and composed of athletic group with- and without dysmenorrhea (n=7, respectively), without dysmenorrhea (n=7) and non-athletic control group without dysmenorrhea (n=7). Venous blood sample was obtained during menstrual- and secretory phase. Blood ovarian hormone concentration was significantly increased during secretory phase compared to menstrual phase in all group, but there were no differences among groups. Blood cortisol and epinephrine concentration did not show any change with menstrual cycle also there were no differences among groups. Blood norepinephrine concentration was significantly decreased during menstrual phase compared to secretory phase in athletic group with dysmenorrhea but athletic group without dysmenorrhea and control group did not show any significant change with menstrual cycle. Stress hormone did not show any significant change in all group during menstrual cycle except norepinephrine which revealed significant decrease in menstrual phase compared to secretory phase on athletic group with dysmenorrhea. In conclusion dysmenorrhea can not effect ovarian hormone during menstrual cycle but partially influenced to stress hormone. Further study needed to elucidate the exact mechanism of those hormone about dysmenorrhea related to the degree of dysmenorrhea and correlation between ovarian and stress hormone.