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Yeong-Kwan Jo,Yeong-Wook Gil,Do Sik Shim,Young-Sik Pyun,박상후 한국정밀공학회 2021 International Journal of Precision Engineering and Vol.8 No.2
We propose an effective method to control the local hardness and morphology of a metal surface by tilting the incident angle of a horn during ultrasonic nanocrystal surface modification (UNSM). In this study, surface treatment using UNSM was performed on an S45C specimen and a parameter study was conducted for optimization. The process parameters were the feeding rate, static load, striking force, and processing angle ( Ф ). In particular, the Ф was analyzed by tilting the horn by 0°, 10°, 20°, 30°, 40°, and 45° to understand its effect on surface hardness and changes in the morphology. From fundamental experiments, some important phenomena were observed, such as grain-microstructure changes along the processing and thickness directions. Furthermore, to verify the practical usefulness of this study, a flat and a hemispherical specimen of S45C material were treated using UNSM with various values of Ф . A significant change in hardness (an increase from 2–45%) and a gradual hardness gradient on the tested specimens could be easily realized by the proposed method. Therefore, we believe that the method is effective for controlling the mechanical hardness of a metal surface.
만성 신부전 환자에서 은단 복용과 동반되어 발생한 전신적 은 중독증
길효욱 ( Gil Hyo Ug ),이준영 ( Lee Jun Yeong ),권순효 ( Kwon Sun Hyo ),조원영 ( Jo Won Yeong ),박종근 ( Park Jong Geun ),양종오 ( Yang Jong O ),이은영 ( Lee Eun Yeong ),홍세용 ( Hong Se Yong ) 대한신장학회 2004 Kidney Research and Clinical Practice Vol.23 No.2
Generalized hyperpigmentation has a wide range of causes, including endocrine diseases, including endocrine diseases, uremia, drugs, and heavy metals. Cutaneous pigmentation observed in 70% of uremic patients on hemodialysis. However, it is clinically difficult to define the exact cause of hyperpigmentation in chronic renal failure patients. We experienced a case of cutaneous hyperpigmentation caused by generalized argyria in chronic hemodialysis patient. A 38-year-old male patient presented with slowly progressive blue-black discoloration of skin. He had been on maintenance hemodialysis for 5 yars and took sliver pills 36 g daily during 2.5 years to relieve thirst. The other source of silver exposure could not be determined. Pathologic examination of skin biopsy specimen showed focal deposits of fine, uniform, brownish granules along the basement membrane zone of hair in the dermis, which is characteristic findings of argyria. The silver deposits were also confirmed by increase in serum silver level and silver amount in liver and skin tissue. Argyria should be suspected in chronic hemodialysis patients presenting with a diffuse bluish-gray discoloration of the skin and nails and evaluated carefully by skin biopsy with quantitation of tissue silver level. (Korean J Nephrol 2004;23(2):345-348)
Anxiety, depression, and stress in Korean patients with chronic urticaria
Gil-Soon Choi,Young-Hee Nam,Chan Sun Park,Mi-Yeong Kim,Eun-Jung Jo,Hye-Kyung Park,Hee-Kyoo Kim 대한내과학회 2020 The Korean Journal of Internal Medicine Vol.35 No.6
Background/Aims: Emotional distress is thought to cause or maintain chronic urticaria (CU). We aimed to investigate the presence of anxiety, depression, and stress in Korean adult CU patients and to explore their potential impact on treatment. Methods: We enrolled 79 CU patients and a disease control group comprising 39 persistent asthma patients. The Hospital Anxiety and Depression Scale (HADS) was used to evaluate depression and anxiety. Stress and quality of life (QoL) were assessed by Stress Response Inventory and CU-QoL questionnaires. The sociodemographic and clinical data such as urticaria activity score (UAS-15, UAS-6) were obtained. Results: The prevalence of depression and anxiety based on the HADS were 48.1% and 38.0%. Although the prevalence of anxiety didn’t differ between the CU and asthma patients, depression was significantly more prevalent in the CU patients (48.1% vs. 28.2%). Stress tended to be lower in CU patients. Anxiety, depression, and stress exhibited negative correlations with QoL. Anxiety showed significant correlation with UAS-6 and pruritus-visual analog scale (VAS; r = 0.256, r = 0.272, p < 0.05, respectively); depression correlated with sleep difficulty-VAS (r = 0.261, p < 0.05). Stress was associated with UAS-15, UAS-6, pruritus-VAS, and sleep difficulty- VAS (r = 0.251, r = 0.317, r = 0.302, r = 0.258, p < 0.05, respectively). Conclusions: The current study first presented that Korean CU patients frequently have anxiety and depression, which affect their QoL and demonstrated that anxiety, depression, and stress had different effects on sleep difficulty, pruritus, and urticaria severity in Korean CU patients.
길준영 ( Gil Jun Yeong ),전의건 ( Jeon Ui Geon ),윤환중 ( Yun Hwan Jung ),김백수 ( Kim Baeg Su ),최용석 ( Choe Yong Seog ),조덕연 ( Jo Deog Yeon ),김삼용 ( Kim Sam Yong ) 대한내과학회 1993 대한내과학회지 Vol.44 No.3
Background : It is well konwn that aplastic anemia is more prevalent in the Far East than elsewhere in the world. There have been many suggestions that the clinical features of the patients with aplastic anemia in Korea would be somewhat different from that of western countries. Analysis of clinical data of 32 cases of aplastic anemia diagnosed at Chungnam National University Hospital from August 1985 to July 1991 was done. Methods : Initially all patients were treated with oxymetholone (50-100mg/d) with or without prednisolone (5-10mg/d) and supportive care. The patients who did not respond to androgen therapy were treated with antilymphocyte globulin (ALG) (20mg/kg/d for 4 days) plus methylprednisolne (methyl PD) (20mg/kg/d for 5 days). Analysis of reponse to therapy was done in 31 patients who could be followed for more than 3 months. Results : 12 patients (37.5%) were in their third decade and 25 cases of patients (78.2%) were below 40 years of age. The incidence decreased in older age groups. Exposure to possible toxic agents were seen in 6 cases (18.8%) ; benzene was counted in 2 cases (6.3%), herb drug in 2 cases (6.3%), antifungal agent in 1 case (3.1%). One case of aplastic anemia occured after acute viral hepatitis infection (type B) (3.1%), Eleven (35.5%) out of thity-one patients responded to androgen therapy (CR : 16.1%, PR : 19.4%). Nine out of the twenty patients who did not respond to androgen therapy were treated with ALG plus methyl PD. Two patients (22.2%) out of 9 showed complete responses. Overall response of present series of patients was 42% (oxymetholone±prednisolone therapy : 35.5%, ALG+methyl PD : 22.2%). By Kaplan-Meier product limit estimation, median survival time of 31cases was 36 months and the actuarial survival at 72 months was 83.1%. The median survival time of 31 cases was 36 months and the actuarial survival at 72 months was 83.1%. The median survival time of severe aplastic anemia (32 months) was similiar with that of moderately severe aplastic anemia (37 months). Factors associated with favourable survival were male sex and presence of etiological factor (p<0.05). Conclusions : In the present series, the survival rate of patients with aplastic anemia were somewhat different from that of western countries. Since the prognosis of patients with aplastic anemia in Korea is more favourable. A randomized controlled study would be needed to define the therapeutic role of bone marrow transplantation in patients with severe aplastic anemia in Korea.
정상한국인에서 보이는 인슐린 저항성과 small dense LDL 과의 관계
조홍근 ( Jo Hong Geun ),신길자 ( Sin Gil Ja ),박시훈 ( Park Si Hun ),김대중 ( Kim Dae Jung ),조은영 ( Jo Eun Yeong ),장양수 ( Jang Yang Su ),( Packard C. J. ),( Shepherd J. ),( Caslake M. ) 한국지질동맥경화학회 ( 구 한국지질학회 ) 2002 韓國脂質學會誌 Vol.12 No.1
목적 : 한국인에서의 small dense LDL과 인슐린저항성과의 관련을 보기 이해 이 연구를 실행하였다. 방법 : 건강한 성인남녀 자원자 84명(남:37 여:47)을 모집하여 공복에 혈액을 채취하였다. 공복혈당, 인슐린을 측정하여 HOMA index를 산출하였다. Lipid clinic protocol에 의해 총콜레스테롤, 중성지방, LDL cholesterol, HDL cholesterol, VLDL cholesterol을 측정하였다. Densit
조성호,이길영,Jo, Seong-Ho,Lee, Gil-Yeong 대한한방안이비인후피부과학회 2001 한방안이비인후피부과학회지 Vol.14 No.1
Herpes zoster oticus which is called Ramsay Hunt syndrome, geniculate ganglion herpes and otic herpes, is characterized by a viral prodrome with otalgia, vesicular eruptions, facial paralysis, hearing disturbance, tinnitus, vertigo and other symtoms. Among cranial nerves, trigeminal and facial nerves are the most commonly affected in patients with herpes zoster oticus, but on rare occasions 8th, 9th, 10th, 11th, 12th cranial nerves and even the upper cervical nerve are influenced as well.. In general, it has poor prognosis compared with Bell's palsy, leaving permanent facial nerve dysfunction. We report a case of Herpes zoster oticus, which was fully recovered by acupuncture and herbal medication within 12 days. We used $FEMA^{11)}$ and House-Brackmann's grading system to assess the degree of paralysis in each part of face.