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김은희,김철규,이순교,김순덕,이혜옥,권정순,이경미,이민미,심순미,유용만,신종식,강은희,이상일,김병식,오성태,육정환,박수길 한국의료QA학회 2003 한국의료질향상학회지 Vol.10 No.2
Background : Gastric cancer is the most common malignant tumor in Korea. surgical operation is one of the major treatment modalities for gastric cancer patients. Therefore, gastrectomy is one of the most common procedures in General Surgery. There were variation in length of hospital stay and medical treatment for gastrectomy between three surgeons at Asan Medical Center. Clinical pathways have received considerable attention as a tool for recucing the medical practice variation, increasing the efficiency of care process, and improving the quality of care. The aim of this study was to evaluate the effect of a clinical pathway for gastrectomy in gastric cancer patients. Methods : The clinical pathway for gastrectomy was developed and implemented by a multidisciplinary group in Asan Medical Center. A computerized clinical pathway program was developed and revised after a pilot test. A total of 145 patients underwent gastrectomy by three surgeons at Asan Medical Center. We compared the length of hospital stay, patient satisfaction, and unplanned readmission rate between the pre-pathway group(n=67) and the post-pathway group(n=78). We also investigated the degree of satisfaction among the physicians and nurses who were main end-users of the clinical pathway. Results : The clinical pathway was applied to all target patients. The average length of hospital stay was shortened from 12.7days to 10.6days(p<0.01). The degree of patient satisfaction with the care process changed from 90.3% to 89.2% after the implementation of the clinical pathway, but the difference was of satistically significant(p=0.761). Unplanned readmission rate was 2.9% in the pre-pathway group. More than 90% of physicians and nurses answered that the clinical pathway had been a useful tool in their medical practice. Conclusions : The findings of the study demonstrated that implementation of the clinical pathway for gastrectomy produced substantial reduction in the length of hospital stay while improving the quality of patient outcomes. The computerized clinical pathway program can be used as one of the powerful patient management tools for reducing the practice variations and increasing the efficiency of care process in Korea hospital settings.
Air-Cavity Transmission Lines on Anodized Aluminum for High-Performance RF Modules
Jong-Min Yook,Kyoung-Min Kim,Young-Se Kwon IEEE 2009 IEEE microwave and wireless components letters Vol.19 No.10
<P>In this study, we form air-cavity transmission lines on anodized aluminum substrates. The fabricated transmission lines are microstrip, grounded CPW, and microshield structures. Thick anodized alumina is used as the post of the suspending structures, and it is realized very easily using selective chemical wet-etching. The insertion losses of the fabricated transmission lines on the anodized aluminum are within a range of 0.2-0.26 dB/mm, and they improve greatly after realizing air-cavity structures to 0.043-0.076 dB/mm at 40 GHz.</P>
Suspended Spiral Inductor and Band-Pass Filter on Thick Anodized Aluminum Oxide
Jong-Min Yook,Kyoung-Min Kim,Young-Se Kwon IEEE 2009 IEEE microwave and wireless components letters Vol.19 No.10
<P>We make suspended inductors and 2.45 GHz BPFs on the selectively anodized aluminum. The thick anodized alumina is used as the supporting dielectric and it is easily removed by using chemical wet-etching. The thickness of anodized alumina is 80 mum and the depth of the total air-cavity is 200 mum. The fabricated inductor over an air cavity has a 25% greater Q factor and 21% higher inductance at 2 GHz compared to an inductor on anodized aluminum. The 2.45 GHz BPF adjusting the suspended inductors has 2.8 dB of insertion loss with a narrow bandwidth.</P>
High-Performance RF Inductors and Capacitors Using the Reverse Trench Structure of Silicon
Jong-Min Yook,Dongsu Kim,Jun Chul Kim THE INSTITUTE OF ELECTRICAL ENGINEERS 2015 IEEE Microwave and Wireless Components Letters Vol. No.
<P>We propose new passive device structures using deep silicon trenches. High-aspect-ratio reverse trench structures coated with copper can be used to make signal lines of the spiral inductor, and a deep trench around the MIM capacitor can be used as a signal isolation wall after back-side thinning. A laminated organic is used to fill the trench. It is possible to make a 10:1 ratio metal pattern maximally, and all signal lines are fixed and isolated due to the laminated organic. Though the spiral inductor is realized on lossy silicon, its Q-factor is higher than 40 at 2 GHz. The fabricated 0.9 GHz LPF adjusting the reverse trench process has only 0.5 dB insertion loss with a very small size.</P>
Spiral Inductors Using Polymer-Core Conductors
Jong-Min Yook,Young-Se Kwon IEEE 2007 IEEE microwave and wireless components letters Vol.17 No.7
<P>We made thick spiral inductors using a polymer-core conductor. The proposed fabrication process to make the polymer-core conductor is very easy and cost effective compared with other radio frequency microelectromechanical systems processes. SU-8 photoresist was used as the core. The fabricated spiral inductors on a high resistivity silicon, 2500 Omega have a very high Q factor of more than 40 at 2 GHz.</P>
Study on the Validity of Surface Electromyography as Assessment Tools for Facial Nerve Palsy
Ryu, Hye-Min,Lee, Seung-Jeong,Park, Eun-Jin,Kim, Su-Gyeong,Kim, Kyeong Han,Choi, Yoo Min,Kim, Jong Uk,Song, Beom Yong,Kim, Cheol Hong,Yoon, Hyun-Min,Yook, Tae-Han KOREAN PHARMACOPUNCTURE INSTITUTE 2018 Journal of pharmacopuncture Vol.21 No.4
Objectives: The purpose of this study was to find out validity of Surface Electromyography(sEMG) compared with Nerve Conduction Study and clinical assessment scale as assessment factors for facial palsy. Methods: We investigated 50 cases of patients with peripheral facial palsy who had records of sEMG and NCS to check. Then we analyzed the correlation between sEMG and NCS that carried out around 1 week after onset. And we analyzed the correlation between sEMG and clinical assessment scales that were measured three times around 1 week, 3-4 weeks and 5-6 weeks after onset. Clinical assessment scales used in this study were House-brackmann grade, Yanagihara unweighted grading scale and Sunnybrook facial grading system. We used Pearson's correlation for statistical analysis. Results: sEMG and NCS, measured at similar times, were statistically correlated. Especially, the correlation with the forehead region was high. And sEMG and clinical assessment scale, measured at same time, were statistically correlated, especially after 5 weeks from onset. Conclusion: According to this study, sEMG is expected to be useful to assessment facial palsy.
Integrated circuit (IC)‐embedded wafer‐level packaging technology for millimeter‐wave power ICs
Yook, Jong‐,Min,Sim, Sanghoon,Park, Bok‐,Ju,Kim, Dongsu,Kim, Young‐,Joon John Wiley Sons, Inc. 2019 MICROWAVE AND OPTICAL TECHNOLOGY LETTERS Vol.61 No.9
<P><B>Abstract</B></P><P>A wafer‐level packaging (WLP) technology for millimeter‐wave power devices is presented, which features simple fabrication, low‐signal transition loss, and thermal consideration. Instead of using a rigid interposer, the proposed WLP technology incorporates thick copper sheet and an adhesive tape as the initial carrier. Short electroplated interconnection showed transition loss within 0.2 dB and return loss above 20 dB, at frequency range up to 30 GHz. We demonstrate the WLP with an RF power amplifier at 28 GHz. The power‐added efficiency (PAE) of the power amplifier packaged in the proposed technology is 30% at an output power of 27.5 dBm, which is identical to an unpackaged integrated circuit (IC) wire bonded on a printed circuit board. The size of the IC, and the final packaged sample was 2.2 × 1.5 × 0.1 mm<SUP>3</SUP> and 3.3 × 2.4 × 0.2 mm<SUP>3</SUP>, respectively.</P>
( Min Hye Kim ),( Sae Hoon Kim ),( Yook Keun Kim ),( Soo Jong Hong ),( Kyung Up Min ),( Sang Heon Cho ),( Heung Woo Park ) 대한내과학회 2013 The Korean Journal of Internal Medicine Vol.28 No.6
Background/Aims: Recent investigations suggest that histone deacetylase 1 (HDAC1) and HDAC2 may be target molecules to predict therapeutic responses to corticosteroids. We evaluated the effects of variation in HDAC1 and HDAC2 on the response to corticosteroids in asthmatics. Methods: Two single nucleotide polymorphisms (SNPs) were selected after rese-quencing HDAC1 and HDAC2. For the first analysis, we evaluated the association between those SNPs and asthma severity in 477 asthmatics. For the second anal-ysis, we evaluated the effects of these SNPs on lung function improvements in response to corticosteroid treatment in 35 independent adult asthmatics and 70 childhood asthmatics. Results: We found that one SNP in HDAC1 (rs1741981) was significantly related to asthma severity in a recessive model (corrected p = 0.036). Adult asthmatics who were homozygous for the minor allele of rs1741981 showed significantly lower % forced expiratory volume in 1 second (%FEV1) increases in response to systemic corticosteroids treatment compared with the heterozygotes or those homozygous for the major allele (12.7% ± 7.2% vs. 37.4% ± 33.7%, p = 0.018). Similarly, childhood asthmatics who were homozygous for the minor allele of rs1741981 showed sig-nificantly lower %FEV1 increases in response to inhaled corticosteroid treatment compared with the heterozygotes or those homozygous for the major allele (14.1% ± 5.9% vs. 19.4% ± 8.9%, p = 0.035). Conclusions: The present study demonstrated that rs1741981 in HDAC1 was sig-nificantly associated with the response to corticosteroid treatment in asthmatics.