CAN YOU COUNT ON WHAT FACEBOOK FRIENDS SAY? THE EFFECT OF SOCIAL IDENTITY THREAT ON EWOM EVALUATION

Yaeri Kim,Yookyung Park,Youseok Lee,Kiwan Park 글로벌지식마케팅경영학회 2016 Global Marketing Conference Vol.2016 No.7

Based on the collaborative and social characteristics, social networking services (SNSs) are growing platforms for consumer-to-consumer conversation including electronic word-of-mouth (eWOM). eWOM is defined as ‘any positive or negative statement made by potential, actual, or former customers about a product or company, which is made available to a multitude of people and institutions via the Internet’ (Hennig-Thurau, Gwinner, Walsh, & Gremler, 2004, p.39). Despite its academic and managerial significance, several preliminary studies have examined what determines effective eWOM in SNSs (e.g., Chu & Kim, 2011; Teng, Khong, Goh, & Chong, 2014). Extending these attempts, we empirically investigate what influences consumers’ evaluation of eWOM, especially on Facebook. We suggest a new perspective of focusing on the psychological stream of social identity (Tajel & Turner, 1986) which is a distinctive factor explicit on Facebook. Unlike conventional eWOM platforms like bulletin boards and online communities where the user information is limited due to anonymity or presented in restricted manner (e.g., reputation from ratings by other members) (Dou, Walden, Lee, & Lee, 2012), Facebook provides profile information about users including one’s social group membership (e.g., school, company). This implies that the perception of social identity on Facebook may influence how one evaluates the source and his/her eWOM message.

Comparative evaluation of nutritional values in different forage sources using in vitro and in vivo rumen fermentation in Hanwoo cattle

Hu Seong Lee,Sung Dae Lee,Seul Lee,Sangsoo Sun,Minseok Kim,Hyuck Choi,Yookyung Lee,Youl-Chang Baek 충남대학교 농업과학연구소 2020 Korean Journal of Agricultural Science Vol.47 No.4

Expressed Sequence Tag Analysis of Antarctic Hairgrass Deschampsia antarctica from King George Island, Antarctica

Lee, Hyoungseok,Cho, Hyunhee,Kim, Ilchan,Yim, Jounghan,Lee, Hongkum,Lee, Yookyung Korean Society for Molecular Biology 2008 Molecules and cells Vol.25 No.2

Deschampsia antarctica is the only monocot that thrives in the tough conditions of the Antarctic region. It is an invaluable resource for the identification of genes associated with tolerance to various environmental pressures. In order to identify genes that are differentially regulated between greenhouse-grown and Antarctic field-grown plants, we initiated a detailed gene expression analysis. Antarctic plants were collected and greenhouse plants served as controls. Two different cDNA libraries were constructed with these plants. A total of 2,112 cDNA clones was sequenced and grouped into 1,199 unigene clusters consisting of 243 consensus and 956 singleton sequences. Using similarity searches against several public databases, we constructed a functional classification of the ESTs into categories such as genes related to responses to stimuli, as well as photosynthesis and metabolism. Real-time PCR analysis of various stress responsive genes revealed different patterns of regulation in the different environments, suggesting that these genes are involved in responses to specific environmental factors.

Low-Frequency Repetitive Transcranial Magnetic Stimulation in the Early Subacute Phase of Stroke Enhances Angiogenic Mechanisms in Rats

Yookyung Lee,Byung-Mo Oh,Sung-Hye Park,Tai Ryoon Han 대한재활의학회 2022 Annals of Rehabilitation Medicine Vol.46 No.5

Objective To characterize the repetitive transcranial magnetic stimulation (rTMS) induced changes in angiogenic mechanisms across different brain regions.Methods Seventy-nine adult male Sprague-Dawley rats were subjected to a middle cerebral artery occlusion (day 0) and then treated with 1-Hz, 20-Hz, or sham stimulation of their lesioned hemispheres for 2 weeks. The stimulation intensity was set to 100% of the motor threshold. The neurological function was assessed on days 3, 10, and 17. The infarct volume and angiogenesis were measured by histology, immunohistochemistry, Western blot, and real-time polymerase chain reaction (PCR) assays. Brain tissue was harvested from the ischemic core (IC), ischemic border zone (BZ), and contralateral homologous cortex (CH).Results Optical density of angiopoietin1 and synaptophysin in the IC was significantly greater in the low-frequency group than in the sham group (p=0.03 and p=0.03, respectively). The 1-Hz rTMS significantly increased the level of Akt phosphorylation in the BZ (p<0.05 vs. 20 Hz). Endothelial nitric oxide synthase phosphorylation was increased in the IC (p<0.05 vs. 20 Hz), BZ (p<0.05 vs. 20 Hz), and CH (p<0.05 vs. 20 Hz and p<0.05 vs. sham). Real-time PCR demonstrated that low-frequency stimulation significantly increased the transcriptional activity of the TIE2 gene in the IC (p<0.05).Conclusion Low-frequency rTMS of the ipsilesional hemisphere in the early subacute phase of stroke promotes the expression of angiogenic factors and related genes in the brain, particularly in the injured area.

Effects of the Characteristics of Internal and External Mentors on the Mentoring Functions

Yookyung Lee(이유경),Jeeyon Paek(백지연) 대한경영학회 2015 大韓經營學會誌 Vol.28 No.1

Outcomes of Second-Line Chemotherapy for Advanced Non-Small Cell Lung Cancer in One Institution

Lee, Seok Jeong,Kang, Hyun Ju,Kim, Seo Woo,Ryu, Yon Ju,Lee, Jin Hwa,Kim, Yookyung,Chang, Jung Hyun The Korean Academy of Tuberculosis and Respiratory 2014 Tuberculosis and Respiratory Diseases Vol.77 No.1

Background: This study analyzed the negative prognostic factors in patients who received second-line chemotherapy for advanced inoperable non-small cell lung cancer (NSCLC). Methods: We retrospectively reviewed the records of 137 patients with inoperable stage III-IV NSCLC who received second-line chemotherapy. The effects of clinical parameters on survival were analyzed and the hazard ratios (HR) for mortality were identified by a Cox regression analysis. Results: Sex, age older than 65 years, smoking history, cell type, T-stage, best response to first-line chemotherapy and first-line chemotherapy regimen were significant negative predictors in univariate analysis. The multivariate analysis showed that patients older than 65 years (HR, 1.530; 95% confidence interval [CI], 1.020-2.297), advanced T stage (T4 vs. T1; HR, 2.273; 95% CI, 1.010-5.114) and non-responders who showed progression with first-line chemotherapy (HR, 1.530; 95% CI, 1.063-2.203) had higher HR for death. Conclusion: The age factor, T stage and responsiveness to first-line chemotherapy were important factors in predicting the outcome of patients with advanced NSCLC who received second-line chemotherapy. The results may help to predict outcomes for these patients in the future.

A Magnetic Resonance-based Seed Localization Method for I-125 Prostate Implants

Lee, Rena J.,Suh, HyunSuk,Lee, Kyung-Ja,Lim, Soome,Kim, Yookyung,Kim, Sungkyu,Choi, Jinho KOREAN ACADEMY OF MEDICAL SCIENCE 2007 JOURNAL OF KOREAN MEDICAL SCIENCE Vol.22//SUP No.-

<P>This study was performed to develop and evaluate a semi-automatic seed localization algorithm from magnetic resonance (MR) images for interstitial prostate brachytherapy. The computerized tomography (CT) and MR images (3 mm-slice thickness) of six patients who had received real-time MR imaging-guided interstitial prostate brachytherapy were obtained. An automatic seed localization method was performed on CT images to obtain seed coordinates, and an algorithm for seed localization from MR images of the prostate was developed and tested. The resultant seed distributions from MR images were then compared to CT-derived distribution by matching the same seeds and calculating percent volume receiving 100% of the prescribed dose and the extent of the volume in 3-dimensions. The semiautomatic seed localization method made it possible to extract more than 90% of the seeds with either less than 8% of noises or 3% of missing seeds. The mean volume difference obtained from CT and MR receiving 100% of the prescribed dose was less than 3%. The maximum extent of the volume receiving the prescribed dose were 0.3, 0.6, and 0.2 cm in x, y, and z directions, respectively. These results indicate that the algorithm is very useful in identifying seeds from MR image for post-implant dosimety.</P>

Intranasal administration of dexmedetomidine (DEX) as a premedication for pediatric patients undergoing general anesthesia for dental treatment

Lee, Yookyung,Kim, Jongsoo,Kim, Seungoh,Kim, Jongbin The Korean Dental Society of Anesthsiology 2016 Journal of Dental Anesthesia and Pain Medicine Vol.16 No.1

Background: The most important reason for pre-operative administration of medication is to reduce anxiety. Alleviation of fear and anxiety about surgery enables patients to remain comfortable during treatment. Dexmedetomidine (DEX) is a fast-acting drug that is used as a premedication in different circumstances because it has sedative and anti-anxiolytic effects, and stable hemodynamics. It also has the advantage of intranasal administration. The aim of this study was to investigate the effects and hemodynamic stability of DEX by retrospectively analyzing cases in which DEX was administered nasally as a premedication. Methods: Ten patients treated at Dankook University Dental Hospital, recruited between February and April 2015, received intranasal delivery of $2{\mu}g/kg$ DEX, 30 minutes prior to general anesthesia. Anesthesia records of anxiety, blood pressure, respiration, pulse, estimated arterial oxygen saturation ($SpO_2$), and partial pressure, or maximum concentration, of carbon dioxide ($ETCO_2$) were analyzed. Results: Administration of DEX prior to a general anesthetic effectively relieved anxiety. Respiratory depression, the most severe adverse effect of other sedatives, was not observed. Hemodynamic stability under general anesthesia was maintained during treatment and a reduction in emergence delirium was observed upon completion of treatment. Conclusions: Premedication administration of DEX is safe for pediatric patients undergoing dental treatment under general anesthesia.

Potential applications of ChatGPT in obstetrics and gynecology in Korea: a review article

YooKyung Lee,So Yun Kim 대한산부인과학회 2024 Obstetrics & Gynecology Science Vol.67 No.2

The use of chatbot technology, particularly chat generative pre-trained transformer (ChatGPT) with an impressive 175 billion parameters, has garnered significant attention across various domains, including Obstetrics and Gynecology (OBGYN). This comprehensive review delves into the transformative potential of chatbots with a special focus on ChatGPT as a leading artificial intelligence (AI) technology. Moreover, ChatGPT harnesses the power of deep learning algorithms to generate responses that closely mimic human language, opening up myriad applications in medicine, research, and education. In the field of medicine, ChatGPT plays a pivotal role in diagnosis, treatment, and personalized patient education. Notably, the technology has demonstrated remarkable capabilities, surpassing human performance in OBGYN examinations, and delivering highly accurate diagnoses. However, challenges remain, including the need to verify the accuracy of the information and address the ethical considerations and limitations. In the wide scope of chatbot technology, AI systems play a vital role in healthcare processes, including documentation, diagnosis, research, and education. Although promising, the limitations and occasional inaccuracies require validation by healthcare professionals. This review also examined global chatbot adoption in healthcare, emphasizing the need for user awareness to ensure patient safety. Chatbot technology holds great promise in OBGYN and medicine, offering innovative solutions while necessitating responsible integration to ensure patient care and safety.

Association of Diaphragm Thickness and Respiratory Muscle Strength With Indices of Sarcopenia

Lee Yookyung,Son Sunhan,Kim Don-Kyu,Park Myung Woo 대한재활의학회 2023 Annals of Rehabilitation Medicine Vol.47 No.4

Objective: To evaluate the relationship between respiratory muscle strength, diaphragm thickness (DT), and indices of sarcopenia.Methods: This study included 45 healthy elderly volunteers (21 male and 24 female) aged 65 years or older. Sarcopenia indices, including hand grip strength (HGS) and body mass index-adjusted appendicular skeletal muscle (ASM/BMI), were measured using a hand grip dynamometer and bioimpedance analysis, respectively. Calf circumference (CC) and gait speed were also measured. Maximal inspiratory pressure (MIP) and maximal expiratory pressure (MEP) were obtained using a spirometer, as a measure of respiratory muscle strength. DT was evaluated through ultrasonography. The association between indices of sarcopenia, respiratory muscle strength, and DT was evaluated using Spearman’s rank correlation test, and univariate and multiple regression analysis.Results: ASM/BMI (r=0.609, p<0.01), CC (r=0.499, p<0.01), HGS (r=0.759, p<0.01), and gait speed (r=0.319, p<0.05) were significantly correlated with DT. In the univariate linear regression analysis, MIP was significantly associated with age (p=0.003), DT (p<0.001), HGS (p=0.002), CC (p=0.013), and gait speed (p=0.026). MEP was significantly associated with sex (p=0.001), BMI (p=0.033), ASM/BMI (p=0.003), DT (p<0.001), HGS (p<0.001), CC (p=0.001) and gait speed (p=0.004). In the multiple linear regression analysis, age (p=0.001), DT (p<0.001), and ASM/BMI (p=0.008) showed significant association with MIP. DT (p<0.001) and gait speed (p=0.050) were associated with MEP.Conclusion: Our findings suggest that respiratory muscle strength is associated with DT and indices of sarcopenia. Further prospective studies with larger sample sizes are needed to confirm these findings.