한국 학생들의 영어 어두자음 발화학습에 관한 실험 연구

강석근,이희천 서울대학교 어학연구소 2002 語學硏究 Vol.38 No.1

The purpose of this paper is to examine through experiment if Korean students can learn sounds like /r/, /f/, /b/ and /v/ precisely, sounds which Korean does not contain, and to discover methods whereby this learning may be accomplished. To this end, we prepared two kinds of test materials with 30 questions each, consisting of pairs with /l, r/, /f, p/, and /b, v/ in word-initial positions. In the tests, 40 third-year students from Janghang Technical High School served as subjects. The subjects were divided into two groups: an experimental group and a control group. The tests consisted of two steps. First, we examined each group's pronunciation ability of the above consonants in word-initial positions. Next, after teaching the experimental group the differences between the consonants above with special programs, we examined their degree of improvement. The results showed that the pronunciation ability of the experimental group improved more than that of the control group. In conclusion, although most of the subjects of the control group had difficulty in pronouncing the sounds that Korean does not contain, they improved their pronunciation ability to some degree by learning the place and manner of articulation, and through reetitive practice.

The Oxford classification as a predictor of prognosis in patients with IgA nephropathy.

Kang, Seok Hui,Choi, Sun Ryoung,Park, Hoon Suk,Lee, Ja Young,Sun, In O,Hwang, Hyeon Seok,Chung, Byung Ha,Park, Cheol Whee,Yang, Chul Woo,Kim, Yong Soo,Choi, Yeong Jin,Choi, Bum Soon Springer International ; Oxford University Press 2012 Nephrology, dialysis, transplantation Vol.27 No.1

<P>In 2009, the Oxford classification was developed as a pathological classification system for immunoglobulin A nephropathy (IgAN) to predict the risk of disease progression. The aim of this retrospective study was to evaluate the clinical and pathologic relevance of the Oxford classification in Korean patients with a pathologic diagnosis of IgAN.</P>

Changes in Renal Function after Different Tandem Hematopoietic Stem-cell Transplantation Approaches in Patients with Multiple Myeloma

Kang, Seok Hui,Hwang, Hyeon Seok,Park, Hoon Suk,Sun, In O,Choi, Sun Ryoung,Chung, Byung Ha,Choi, Bum Soon,Yang, Chul Woo,Kim, Yong Soo,Min, Chang Ki,Park, Cheol Whee The Korean Academy of Medical Sciences 2011 JOURNAL OF KOREAN MEDICAL SCIENCE Vol.26 No.10

<P>This study was done to observe the alteration of the estimated glomerular filtration rate (eGFR) in multiple myeloma patients according to type of tandem hematopoietic stem cell transplantation (HSCT). Forty-one patients were enrolled in this study. Twenty patients underwent autologous HSCT (auto-HSCT) and 21 patients underwent allogeneic HSCT (allo-HSCT). The changes in eGFR after the two tandem HSCT modalities were different between the two groups, according to the donor of stem cells (<I>P</I> = 0.016). In the auto-HSCT group, the eGFR, recorded 12 months after secondary HSCT, was significantly decreased compared with the eGFR recorded before stem cell mobilization (<I>P</I> = 0.005). Although there was no significant difference, the trend showed that the eGFR after allo-HSCT decreased from the previous HSCT until a month after secondary HSCT. In addition, after 6 months of secondary HSCT, the eGFR recovered to the level recorded prior to the HSCT (<I>P</I> = 0.062). This difference may be due to total body irradiation, a calcineurin inhibitor, or maintemance therapy. Changes in renal function would be monitored closely for these patients. The recovery of the eGFR would be a main focus for the patients treated with the total body irradiation or the calcineurin inhibitor, a progressive decline of the eGFR would be also crucial for the patients treated with maintenance therapy.</P>

The relationship between disability and clinical outcomes in maintenance dialysis patients

( Seok Hui Kang ),( Jun Young Do ),( Jun Chul Kim ) 영남대학교 의과대학 2021 Yeungnam University Journal of Medicine Vol.38 No.2

Background: Dialysis patients are prone to having disabilities. We aimed to evaluate the association between disability and various clinical outcomes in Korean dialysis patients. Methods: This study consisted of 1,615 dialysis patients from 27 centers. We evaluated disability by using four questions on the activities of daily living (ADLs) concerning whether help was needed for feeding, dressing/undressing, getting in/out of bed, or taking a bath/shower. We divided the patients into three groups: no disability (Non-D, none of the four ADL domains required help; n=1,312), mild disability (Mild-D, one ADL domain required some/full help; n=163), or moderate to severe disability (MS-D, two or more ADL domains required some/full help; n=140). We evaluated falls, frailty, health-related quality of life (HRQoL), mortality, and hospitalization. Results: The numbers of participants with a fall during the last 1 year were 199 (15.2%), 42 (25.8%), and 44 (31.4%) in the Non-D, Mild-D, and MS-D groups, respectively (p<0.001). The numbers of participants with frailty in the Non-D, Mild-D, and MS-D groups were 381 (29.0%), 84 (51.5%), and 93 (66.4%), respectively (p<0.001). In both univariate and multivariate analyses, the physical component scale and mental component scale scores decreased as the grade of disability increased (p<0.001 for both scores). Hospitalization-free survival rate at 500 days was 64.2%, 56.7%, and 51.1% in the Non-D, Mild-D, and MS-D, respectively (p=0.001 for trend). Patient survival rate at 500 days was 95.3%, 89.5%, and 92.3% in the Non-D, Mild-D, and MS-D, respectively (p=0.005 for trend). Conclusion: Disability was associated with falls, frailty, HRQoL scales, and survival trends in Korean dialysis patients.

Association between low-grade albuminuria and hearing impairment in a non-diabetic Korean population: The Korea National Health and Nutrition Examination Survey (2011–2013)

Kang, Seok Hui,Jung, Da Jung,Choi, Eun Woo,Park, Jong Won,Cho, Kyu Hyang,Yoon, Kyung Woo,Do, Jun Young Informa UK (Informa Healthcare) 2015 Annals of medicine Vol.47 No.8

Hyperglycemic Hyperosmolar Syndrome Caused by Steroid Therapy in a Patient with Lupus Nephritis

Kang, Seok-Hui,Lee, Ja-Young,Park, Hoon-Suk,Sun, In-O,Choi, Sun-Ryoung,Chung, Byung-Ha,Choi, Bum-Soon,Yang, Chul-Woo,Kim, Yong-Soo,Park, Cheol-Whee The Korean Academy of Medical Sciences 2011 JOURNAL OF KOREAN MEDICAL SCIENCE Vol.26 No.3

<P>A 51-yr-old female was referred to our outpatient clinic for the evaluation of generalized edema. She had been diagnosed with idiopathic thrombocytopenic purpura (ITP). She had taken no medicine. Except for the ITP, she had no history of systemic disease. She was diagnosed with systemic lupus erythematosus. Immunosuppressions consisting of high-dose steroid were started. When preparing the patient for discharge, a generalized myoclonic seizure occurred at the 47th day of admission. At that time, the laboratory and neurology studies showed hyperglycemic hyperosmolar syndrome. Brain MRI and EEG showed brain atrophy without other lesion. The seizure stopped after the blood sugar and serum osmolarity declined below the upper normal limit. The patient became asymptomatic and she was discharged 10 weeks after admission under maintenance therapy with prednisolone, insulin glargine and nateglinide. The patient remained asymptomatic under maintenance therapy with deflazacort and without insulin or medication for blood sugar control.</P>

Association of sarcopenia and its components with clinical outcomes in patients undergoing peritoneal dialysis

( Seok Hui Kang ),( A Young Kim ),( Jun Young Do ) 대한신장학회 2022 Kidney Research and Clinical Practice Vol.41 No.6

Background: Further studies are needed to identify whether muscle mass, muscle strength, or sarcopenia is the best indicator of survival in patients undergoing peritoneal dialysis (PD). We aimed to compare the association of sarcopenia and its components with survival in patients undergoing PD. Methods: We identified all patients with PD (n = 199). We routinely recommended handgrip strength (HGS) and lean mass measurements using dual energy X-ray absorptiometry in all patients with PD. Sarcopenia was defined using cutoff values from the Asian Working Group for Sarcopenia. We evaluated the patient and technique survival rates. Results: The number of patients with low HGS was 95 (47.7%). The median follow-up interval was 17 months (interquartile range, 13-21 months). Kaplan-Meier curve analysis showed that patients with low HGS or sarcopenia had poorer patient and technique survival compared with patients with normal HGS or without sarcopenia. Cox regression analysis showed that patients with low HGS had greater hazard ratios for patient death and technique failure compared with those with normal HGS. However, patients with low muscle mass were not significantly higher hazard ratios for patient death or technique failure compared with those with normal muscle mass. Patients with sarcopenia had significantly greater hazard ratios for patient death or technique failure than those without sarcopenia only in univariate analysis. Conclusion: The present study demonstrated that HGS may be superior to muscle mass or sarcopenia for predicting patient or technique survival in patients undergoing PD.

Comparison of Clinical Outcomes by Different Renal Replacement Therapy in Patients with End-Stage Renal Disease Secondary to Lupus Nephritis

Kang, Seok-Hui,Chung, Byung-Ha,Choi, Sun-Ryoung,Lee, Ja-Young,Park, Hoon-Suk,Sun, In-O,Choi, Bum-Soon,Park, Cheol-Whee,Kim, Yong-Soo,Yang, Chul-Woo The Korean Association of Internal Medicine 2011 The Korean Journal of Internal Medicine Vol.26 No.1

<P><B>Background/Aims</B></P><P>Many studies have compared patients with systemic lupus erythematosus (SLE) on renal replacement therapy (RRT) with non-lupus patients. However, few data are available on the long-term outcome of patients with end-stage renal disease (ESRD) secondary to SLE who are managed by different types of RRTs.</P><P><B>Methods</B></P><P>We conducted a retrospective multicenter study on 59 patients with ESRD who underwent maintenance RRT between 1990 and 2007 for SLE. Of these patients, 28 underwent hemodialysis (HD), 14 underwent peritoneal dialysis (PD), and 17 patients received kidney transplantation (KT). We analyzed the clinical outcomes in these patients to determine the best treatment modality.</P><P><B>Results</B></P><P>The mean follow-up period was 5 ± 3 years in the HD group, 5 ± 3 years in the PD group, and 10 ± 5 years in the KT group (<I>p</I> = 0.005). Disease flare-up was more common in the HD group than in the KT group (<I>p</I> = 0.012). Infection was more common in the PD and HD groups than in the KT group (HD vs. KT, <I>p</I> = 0.027; PD vs. KT, <I>p</I> = 0.033). Cardiovascular complications were more common in the HD group than in the other groups (<I>p</I> = 0.049). Orthopedic complications were more common in the PD group than in the other groups (<I>p</I> = 0.028). Bleeding was more common in the HD group than in the other groups (<I>p</I> = 0.026). Patient survival was greater in the KT group than in the HD group (<I>p</I> = 0.029). Technique survival was lower in the PD group than in the HD group (<I>p</I> = 0.019).</P><P><B>Conclusions</B></P><P>Among patients with ESRD secondary to SLE, KT had better patient survival and lower complication rates than HD and lower complication rates than PD. The prognosis between the HD and PD groups was similar. We conclude that if KT is not a viable treatment option, any alternative treatment should take into account the patient's general condition and preference.</P>

Application of SFCL on Bus Tie for Parallel Operation of Power Main Transformers in a Fuel Cell Power Systems

Hui-Seok Chai,Byoung-Wook Kang,Jin-Seok Kim,Jae-Chul Kim 대한전기학회 2015 Journal of Electrical Engineering & Technology Vol.10 No.6

In the power plant using high temperature fuel cells such as Molten Carbonate Fuel Cell(MCFC), and Solid Oxide Fuel Cell(SOFC), the generated electric power per area of power generation facilities is much higher than any other renewable energy sources. - High temperature fuel cell systems are capable of operating at MW rated power output. - It also has a feature that is short for length of the line for connecting the interior of the generation facilities. In normal condition, these points are advantages for voltage drops or power losses. However, in abnormal condition such as fault occurrence in electrical system, the fault currents are increased, because of the small impedance of the short length of power cable. Commonly, to minimize the thermal-mechanical stresses on the stack and increase the systems reliability, we divided the power plant configuration to several banks for parallel operation. However, when a fault occurs in the parallel operation system of power main transformer, the fault currents might exceed the interruption capacity of protective devices. In fact, although the internal voltage level of the fuel cell power plant is the voltage level of distribution systems, we should install the circuit breakers for transmission systems due to fault current. To resolve these problems, the SFCL has been studied as one of the noticeable devices. Therefore, we analyzed the effect of application of the SFCL on bus tie in a fuel cell power plants system using PSCAD/EMTDC.

Comparison of Clinical Outcomes by Different Renal Replacement Therapy in Patients with End Stage Renal Disease Secondary to Lupus Nephritis

( Seok Hui Kang ),( Byung Ha Chung ),( Sun Ryoung Choi ),( Ja Young Lee ),( Hoon Suk Park ),( In O Sun ),( Bum Soon Choi ),( Cheol Whee Park ),( Yong Soo Kim ),( Chul Woo Yang ) 대한내과학회 2011 The Korean Journal of Internal Medicine Vol.26 No.1

Background/Aims: Many studies have compared patients with systemic lupus erythematosus (SLE) on renal replacement therapy (RRT) with non-lupus patients. However, few data are available on the long-term outcome of patients with end-stage renal disease (ESRD) secondary to SLE who are managed by different types of RRTs. Methods: We conducted a retrospective multicenter study on 59 patients with ESRD who underwent maintenance RRT between 1990 and 2007 for SLE. Of these patients, 28 underwent hemodialysis (HD), 14 underwent peritoneal dialysis (PD), and 17 patients received kidney transplantation (KT). We analyzed the clinical outcomes in these patients to determine the best treatment modality. Results: The mean follow-up period was 5 ± 3 years in the HD group, 5 ± 3 years in the PD group, and 10 ± 5 years in the KT group (p = 0.005). Disease flare-up was more common in the HD group than in the KT group (p = 0.012). Infection was more common in the PD and HD groups than in the KT group (HD vs. KT, p = 0.027; PD vs. KT, p = 0.033). Cardiovascular complications were more common in the HD group than in the other groups (p = 0.049). Orthopedic complications were more common in the PD group than in the other groups (p = 0.028). Bleeding was more common in the HD group than in the other groups (p = 0.026). Patient survival was greater in the KT group than in the HD group (p = 0.029). Technique survival was lower in the PD group than in the HD group (p = 0.019). Conclusions: Among patients with ESRD secondary to SLE, KT had better patient survival and lower complication rates than HD and lower complication rates than PD. The prognosis between the HD and PD groups was similar. We conclude that if KT is not a viable treatment option, any alternative treatment should take into account the patient`s general condition and preference. (Korean J Intern Med 2011;26:60-67)