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최일홍,박순규,황준혁 진주여자전문대학 2001 論文集 Vol.24 No.-
In this paper, we has been studied the variable diffusion filter bank. A variable diffusion filter bank which varies the width of pass band is using diffusion network. A variable diffusion filter bank which has advantage of building multi-channel without additional hardware. The simulation result of pass band ripple was very small and the range of slop hand was ignorable.
박순규,최일홍,황준혁 진주여자전문대학 2002 論文集 Vol.25 No.-
In this thesis, the method for period detection of korean continuous speech recognition, detecting the voice section out of input signal and classification of the voice section by voiced and unvoiced, after period detection in classified voiced. Strong at noise, because of threshold energy stipulate in input signal, possible to detecting the voice section and classification voiced and unvoiced by zero crossing rate(ZCR) and short time energy(STE), period detecting possible as real-time approach by matlab.
신규만,송준혁,김명현,최혜영 梨花女子大學校 醫科大學 醫科學硏究所 1996 EMJ (Ewha medical journal) Vol.19 No.4
Objectives : The timing of aneurysm surgery has been a topic of major neurosurgical controversy. Aneurysmal rebleeding is the most cataclysmic and disabling event following initial subarachnoid hemorrhage. Thus, early surgical obliteration of aneurysm eliminates the potential for rebleeding during the highest risk period. Method : The results of operation for the twenty-three patients who had admitted to neurosurgical departments, Mokdong hospital and undergone surgery within the 24-72 hours after initial rupture of these aneurysms from October, 1993 to August, 1996, were reviewed. Results : Twenty-three patients underwent craniotomy for clipping and intracranial clot evacuation, and postoperative hypertensive, hypervolemic, and hemodilution therapy. The outcome was excellent in 10(43%), good in 3(13%), poor in 5(22%) and death in 5(22%). The mean age was 57.7 and the ratio of male to female was 13:10. The outcome according to Hunt-Hess(H-H) grade was followings. H-H grade 1 was 2(%) and all excellent outcome, H-H grade 2 24(61%) and the outcome were excellent in 8(35%), good in 1(4%), poor in 2(9%), death in 3(13%), H-H grade 3 was 6(26%) and good in 2(9%), poor in 2(9%), death in 2(9%), and H-H grade 4 was 1(4%) and the outcome was poor in 1(4%). The outcome according to grading system of Fisher was followings. Grade 2 was 6(26%), and the outcome was excellent in 5(22%) and death in 1(4%). The grade 3 was 14(61%) and excellent in 5(22%), good in 2(9%), poor in 3(13%), and death in 1(4%). The grade 4 was 3(31%) and good in (4%) and poor in 2(9%). The variations in anterior communicating complex were followings. The both A_1 equal in 6(26%), left A_1 dominancy was 1(4%), right A_1 atresia was 13(57%) and left atresia was 3(13%). Conclusions : The most favorable outcomes and lowest mortality rate were patients of H-H grade 1 group. The surgical results of alert patients with early surgery should even further improve as compared to delay surgery. However, patients who present in poor medical condition at the time of operation were still indicated delay surgery.
HCC : A Case of Hepatoblastoma Occurred in Young Adult
( Jun Hyeok Choi ),( Hyun Hee Kim ),( Chang Jin Seo ),( Min Keun Kim ),( Byung Seok Kim ),( Hoon Kyu Oh ),( Chang Hyeong Lee ) 대한간학회 2013 춘·추계 학술대회 (KASL) Vol.2013 No.1
Background: Most cases of hepatoblastoma are found under age two, so occurance in adult is extremely rare. There reported only 45 cases of hepatoblastoma globally. Complete surgical resection is essential in the treatment of hepatoblastoma, but not so many experiences in adult hepatoblastoma makes it difficult to occur complete remission. But survival time varies from 2week to 38 months, 6 months in median, shorter in adult than childhood. We report one case of adult hepatoblastoma with mixed mesenchymal type, recurred even after primary resection and adjuvant chemotherapy. Case: A 36 year-old female came to emergency department with aggravating right upper abdominal pain for 2 hours. The patient was non-alcoholics, and took entecavir 0.5 mg for low replicative chronic viral hepatitis B for 5 years. Laboratory test showed mild leukocytosis and markably elevated serum alphafetoprotein. Abdominal CT scan showed 9 cm sized cystic mass with internal hemorrhage at right hepatic lobe with hemoperitoneum, so emergency hepatic central bisectionectomy was done. On histologic examination, soft tissue mass showed tumor cells with predominantly solid, but tubular or rosette-like structures, compatible with hepatoblastoma. During follow up, new onset of hepatoblastoma was found on multiple sites of abdomen, Chemotherapy started with cisplatin(60 mg/m2), 5-FU(fluorourasil)(600 mg/m2), vincristine(1.5/m2), total 3 cycles of chemotherapy were done every 4 week. After 3rd chemotherapy cycle, follow up abdominal CT scan showed multiple intraperitoneal metastasis with interval progression with large amount of intraperitoneal fluid, so chemotherapy regimen changed to carboplatin(350 mg/m2) with doxorubicin(30 mg/m2) for additional 4 cycles. The patient experienced neutropenia neutropenia after new regimen, but recovered shortly after G-CSF. Conclusions: Due to rarity of hepatoblastoma in adults and non-specific symptoms, the diagnosis is often overlooked. Patients might be diagnosed at late stages of the disease at risk of increased mortality. Early resection may lead to improved prognosis and survival.
Interregional synaptic maps among engram cells underlie memory formation
Choi, Jun-Hyeok,Sim, Su-Eon,Kim, Ji-il,Choi, Dong Il,Oh, Jihae,Ye, Sanghyun,Lee, Jaehyun,Kim, TaeHyun,Ko, Hyoung-Gon,Lim, Chae-Seok,Kaang, Bong-Kiun American Association for the Advancement of Scienc 2018 Science Vol.360 No.6387
<P>Memory resides in engram cells distributed across the brain. However, the site-specific substrate within these engram cells remains theoretical, even though it is generally accepted that synaptic plasticity encodes memories. We developed the dual-eGRASP (green fluorescent protein reconstitution across synaptic partners) technique to examine synapses between engram cells to identify the specific neuronal site for memory storage. We found an increased number and size of spines on CA1 engram cells receiving input from CA3 engram cells. In contextual fear conditioning, this enhanced connectivity between engram cells encoded memory strength. CA3 engram to CA1 engram projections strongly occluded long-term potentiation. These results indicate that enhanced structural and functional connectivity between engram cells across two directly connected brain regions forms the synaptic correlate for memory formation.</P>