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Case series of nerve injuries during laparoscopic or robotic gynecologic surgery
( Sohee Park ),( Hayeon Kim ),( Jae Hong Sang ),( Soo-ho Chung ),( Jeong In Choi ) 대한산부인과학회 2022 대한산부인과학회 학술대회 Vol.108 No.-
Nerve injuries during gynecologic endoscopy are rare but distressing complication. Upper and lower limb peripheral nerves are the most common nerves injured during laparoscopic or robotic gynecologic surgery. The probable cause of nerve injury is the posture the patient maintained during surgery. Restraining arms during general anesthesia with an unintentional change in the angle of the arm in the Trendelenburg position, may lead to hyperextension of the arm, resulting in pressure on and stretching of the brachial plexus nerve and neurologic damage. High lithotomy with extreme flexion at the hip and steep Trendelenburg positions can contribute to perioperative lower limb peripheral nerve injuries. We present several cases of patients who underwent laparoscopic or robotic gynecologic surgery and had nerve injuries
Sohee Park,Sang Min Lee,도경현,June-Goo Lee,Woong Bae,Hyunho Park,Kyu-Hwan Jung,Joon Beom Seo 대한영상의학회 2019 Korean Journal of Radiology Vol.20 No.10
Objective: To retrospectively assess the effect of CT slice thickness on the reproducibility of radiomic features (RFs) of lung cancer, and to investigate whether convolutional neural network (CNN)-based super-resolution (SR) algorithms can improve the reproducibility of RFs obtained from images with different slice thicknesses. Materials and Methods: CT images with 1-, 3-, and 5-mm slice thicknesses obtained from 100 pathologically proven lung cancers between July 2017 and December 2017 were evaluated. CNN-based SR algorithms using residual learning were developed to convert thick-slice images into 1-mm slices. Lung cancers were semi-automatically segmented and a total of 702 RFs (tumor intensity, texture, and wavelet features) were extracted from 1-, 3-, and 5-mm slices, as well as the 1-mm slices generated from the 3- and 5-mm images. The stabilities of the RFs were evaluated using concordance correlation coefficients (CCCs). Results: The mean CCCs for the comparisons of original 1 mm vs. 3 mm, 1 mm vs. 5 mm, and 3 mm vs. 5 mm images were 0.41, 0.27, and 0.65, respectively (p < 0.001 for all comparisons). Tumor intensity features showed the best reproducibility while wavelets showed the lowest reproducibility. The majority of RFs failed to achieve reproducibility (CCC ≥ 0.85; 3.6%, 1.0%, and 21.5%, respectively). After applying the CNN-based SR algorithms, the reproducibility significantly improved in all three pairings (mean CCCs: 0.58, 0.45, and 0.72; p < 0.001 for all comparisons). The reproducible RFs also increased (36.3%, 17.4%, and 36.9%, respectively). Conclusion: The reproducibility of RFs in lung cancer is significantly influenced by CT slice thickness, which can be improved by the CNN-based SR algorithms.
Sohee Park,Sang Min Lee,최주애,이준구,이상민,도경현,Joon Beom Seo 대한영상의학회 2019 Korean Journal of Radiology Vol.20 No.7
Objective: To retrospectively investigate whether tumor size assessment on multiplanar reconstruction (MPR) CT images better reflects pathologic T-stage than evaluation on axial images and evaluate the additional value of measurement in threedimensional (3D) space. Materials and Methods: From 1661 patients who had undergone surgical resection for primary lung cancer between June 2013 and November 2016, 210 patients (145 men; mean age, 64.4 years) were randomly selected and 30 were assigned to each pathologic T-stage. Two readers independently measured the maximal lesion diameters on MPR CT. The longest diameters on 3D were obtained using volume segmentation. T-stages determined on CT images were compared with pathologic T-stages (overall and subgroup—Group 1, T1a/b; Group 2, T1c or higher), with differences in accuracy evaluated using McNemar’s test. Agreement between readers was evaluated with intraclass correlation coefficients (ICC). Results: The diagnostic accuracy of MPR measurements for determining T-stage was significantly higher than that of axial measurement alone for both reader 1 (74.3% [156/210] vs. 63.8% [134/210]; p = 0.001) and reader 2 (68.1% [143/210] vs. 61.9% [130/210]; p = 0.049). In the subgroup analysis, diagnostic accuracy with MPR diameter was significantly higher than that with axial diameter in only Group 2 (p < 0.05). Inter-reader agreements for the ICCs on axial and MPR measurements were 0.98 and 0.98. The longest diameter on 3D images showed a significantly lower performance than MPR, with an accuracy of 54.8% (115/210) (p < 0.05). Conclusion: Size measurement on MPR CT better reflected the pathological T-stage, specifically for T1c or higher stage lung cancer. Measurements in a 3D plane showed no added value.
( Park Sohee ) 국어교육학회 2018 國語敎育學硏究 Vol.53 No.5
The study systemically reviewed empirical studies on the assessment of digital multimodal composition (DMC) and identified key domains and criteria for the assessment of K-12 students’ DMC. Based on the concept of multimodality and universal theoretical assumptions on it (Jewitt, 2014), this study argued that assessment tools of DMC should consider both linguistic and non-linguistic modes, their unique communicative roles, relationships between modes, and social norms and conventions about signs. The multi-step analyses drew 19 distinguishable criteria from 111 criteria presented in 15 relevant studies. The findings section defined new criteria and described how they are related to the a priori domains and the existing criteria. This literature review contributes to the field by providing a comprehensive list of criteria for DMC teaching and assessment. Limitations of the study and suggestions for future studies were also discussed.
Sohee Cheon,Won Woo Lee,Won Il Park,Joo-Yun Jung,Jun-hyuk Choi,Dae-geun Choi,Sohee Jeon,Jun-ho Jeong,Jihye Lee 한국공업화학회 2020 Journal of Industrial and Engineering Chemistry Vol.81 No.-
Vertically aligned ZnO nanorods have been widely investigated for use in piezoelectric generators,photovoltaic devices, nanotemplates, photoelectrochemical applications, etc. In addition to verticalalignment, intentional arrangement of ZnO nanorods according to a careful design can enhance thedevice performance. In this work, we used metal nanotransfer printing to fabricate arrangement-controlled and vertically grown ZnO nanorods on both hard andflexible substrates. Highly verticalgrowth and periodical arrangement of the ZnO nanorods were confirmed by microscope images. Theircrystallinity and photoluminescence characteristics were also investigated. Transmission spectra of thesubstrates show the enhancement of optical transmission after the nanorod growth. We believe that thisfabrication technique lends itself to simple fabrication of arrangement-controlled and vertically grownone-dimensional nanostructures on both hard andflexible substrates for application in solar cells, watersplitting, metamaterials, etc.
Nanosilver Colloids-Filled Photonic Crystal Arrays for Photoluminescence Enhancement
Park, Seong-Je,Lee, Soon-Won,Jeong, Sohee,Lee, Ji-Hye,Park, Hyeong-Ho,Choi, Dae-Geun,Jeong, Jun-Ho,Choi, Jun-Hyuk Springer 2010 Nanoscale research letters Vol.5 No.10
<P>For the improved surface plasmon-coupled photoluminescence emission, a more accessible fabrication method of a controlled nanosilver pattern array was developed by effectively filling the predefined hole array with nanosilver colloid in a UV-curable resin <I>via</I> direct nanoimprinting. When applied to a glass substrate for light emittance with an oxide spacer layer on top of the nanosilver pattern, hybrid emission enhancements were produced from both the localized surface plasmon resonance-coupled emission enhancement and the guided light extraction from the photonic crystal array. When CdSe/ZnS nanocrystal quantum dots were deposited as an active emitter, a total photoluminescence intensity improvement of 84% was observed. This was attributed to contributions from both the silver nanoparticle filling and the nanoimprinted photonic crystal array.</P>
The Role of the Executive Pay Cap: Evidence from Korea
( Sohee Park ),( Natalie Kyung Won Kim ),( Jae Yong Shin ),( Sun-moon Jung ) 한국회계학회 2021 會計學硏究 Vol.46 No.2
Korean firms are required to obtain shareholder approval on their executive pay cap―the maximum possible amount of total compensation for all executives. This paper investigates the efficacy of the executive pay cap requirement by analyzing the determinants and implications of the executive pay cap of Korean firms. We document that the executive pay cap is not a boilerplate figure and is associated with corporate governance and economic factors. We find that the executive pay cap is adjusted according to changes in firm performance and that a significant portion of sample firms revise their executive pay cap downwards. However, we only observe this phenomenon when foreign ownership is high, largest shareholders’ ownership is high, a controlling shareholder is a board member, and the firm is a non-chaebol firm. Thus, we find that the external and internal monitoring mechanisms affect whether the executive pay cap is better aligned with firm performance. Our results also suggest that the executive pay cap is used as an anchor for determining executive compensation. We do not find support for the alternative possibility that firms could signal future firm performance through the executive pay cap.