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413 results on '"Ahn, Sanghyun"'

33. Proactive Internet Gateway Discovery Mechanisms for Load-Balanced Internet Connectivity in MANET

Author

Kim, Youngmin, Ahn, Sanghyun, Yu, Hyun, Lee, Jaehwoon, Lim, Yujin, Hutchison, David, Series editor, Kanade, Takeo, Series editor, Kittler, Josef, Series editor, Kleinberg, Jon M., Series editor, Mattern, Friedemann, Series editor, Mitchell, John C., Series editor, Naor, Moni, Series editor, Nierstrasz, Oscar, Series editor, Pandu Rangan, C., Series editor, Steffen, Bernhard, Series editor, Sudan, Madhu, Series editor, Terzopoulos, Demetri, Series editor, Tygar, Doug, Series editor, Vardi, Moshe Y., Series editor, Weikum, Gerhard, Series editor, Vazão, Teresa, editor, Freire, Mário M., editor, and Chong, Ilyoung, editor

Published
2008
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34. Intravascular Fasciitis in the Femoral Vein with Hypermetabolic Signals Mimicking a Sarcoma: The Role of Preoperative Imaging Studies with Review of Literature

Author

Kim, Hyo Kee, Han, Ahram, Ahn, Sanghyun, Min, Sangil, Ha, Jongwon, and Min, Seung-Kee

Subjects
Leiomyosarcoma, lcsh:Diseases of the circulatory (Cardiovascular) system, Duplex ultrasonography, medicine.medical_specialty, positron emission tomography, Deep vein, Femoral vein, Case Report, 030204 cardiovascular system & hematology, 030230 surgery, Malignancy, 03 medical and health sciences, 0302 clinical medicine, medicine, magnetic resonance imaging, Vein, lcsh:RC633-647.5, business.industry, computed tomography, lcsh:Diseases of the blood and blood-forming organs, medicine.disease, Thrombosis, intravascular fasciitis, femoral vein, medicine.anatomical_structure, lcsh:RC666-701, Surgery, Radiology, Sarcoma, Cardiology and Cardiovascular Medicine, business
Abstract

Intravascular fasciitis (IVF) is a very rare disease that is difficult to diagnose preoperatively. Frequently, it can be misdiagnosed as a malignancy or deep vein thrombosis. A 26-year-old man presented with a 6-month history of intermittent cramping pain in the right calf. Duplex ultrasonography, computed tomography, magnetic resonance imaging, and positron emission tomography were performed in various hospitals. The work-up revealed a hypermetabolic mass in the femoral vein, suggestive of a malignancy, such as leiomyosarcoma. The tumor was located inside the femoral vein with no invasion, and the mass was resected en bloc with the vein wall. Intraoperative frozen section biopsy revealed no malignancy, and the final pathological diagnosis was IVF. Herein, we report a case of IVF and discuss the role of imaging studies in its preoperative diagnosis, with an extensive literature review.

Published
2021

35. Stump Length Changes after Endovenous Cyanoacrylate Closure or Radiofrequency Ablation for Saphenous Vein Incompetence

Author

Ko, Hyunmin, Min, Sangil, Ahn, Sanghyun, Han, Ahram, Kim, Jungsun, and Min, Seung-Kee

Subjects
lcsh:Diseases of the circulatory (Cardiovascular) system, medicine.medical_specialty, Duplex ultrasonography, Radiofrequency ablation, 030204 cardiovascular system & hematology, 030230 surgery, law.invention, 03 medical and health sciences, 0302 clinical medicine, Recurrence, law, Varicose veins, Medicine, Clinical severity, In patient, Glues, Vein, lcsh:RC633-647.5, business.industry, lcsh:Diseases of the blood and blood-forming organs, University hospital, Surgery, surgical procedures, operative, medicine.anatomical_structure, lcsh:RC666-701, Cyanoacrylate, cardiovascular system, Original Article, medicine.symptom, Cardiology and Cardiovascular Medicine, business
Abstract

Purpose: The aim of this study was to analyze changes in stump length over time in patients with saphenous vein incompetence treated with cyanoacrylate closure (CAC) or radiofrequency ablation (RFA). Materials and Methods : : We retrospectively analyzed data collected from patients with saphenous vein incompetence who underwent either CAC or RFA at Seoul National University Hospital between November 2015 and December 2018. The stump lengths were measured using duplex ultrasonography (DUS) within 1 month and 6 months after treatment. The Venous Clinical Severity Score (VCSS) and Aberdeen Varicose Vein Questionnaire (AVVQ) score were used to assess clinical outcomes. Results : : A total of 97 veins (64 great saphenous veins and 33 small saphenous veins) were analyzed. The stump length was not significantly different between the two groups at

Published
2021

36. Load Balancing Mechanisms in the MANET with Multiple Internet Gateways,

Author

Kim, Youngmin, Lim, Yujin, Ahn, Sanghyun, Yu, Hyun, Lee, Jaehwoon, Choe, Jongwon, Hutchison, David, editor, Kanade, Takeo, editor, Kittler, Josef, editor, Kleinberg, Jon M., editor, Mattern, Friedemann, editor, Mitchell, John C., editor, Naor, Moni, editor, Nierstrasz, Oscar, editor, Pandu Rangan, C., editor, Steffen, Bernhard, editor, Sudan, Madhu, editor, Terzopoulos, Demetri, editor, Tygar, Dough, editor, Vardi, Moshe Y., editor, Weikum, Gerhard, editor, Chong, Ilyoung, editor, and Kawahara, Kenji, editor

Published
2006
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37. Dynamic Clustering for Coverage-Time Maximization in Two-Tiered Hierarchical Sensor Network Architectures

Author

Kim, Joongheon, Lee, Wonjun, Kim, Dongshin, Kim, Eunkyo, Kim, Hyeokman, Ahn, Sanghyun, Hutchison, David, editor, Kanade, Takeo, editor, Kittler, Josef, editor, Kleinberg, Jon M., editor, Mattern, Friedemann, editor, Mitchell, John C., editor, Naor, Moni, editor, Nierstrasz, Oscar, editor, Pandu Rangan, C., editor, Steffen, Bernhard, editor, Sudan, Madhu, editor, Terzopoulos, Demetri, editor, Tygar, Dough, editor, Vardi, Moshe Y., editor, Weikum, Gerhard, editor, Sha, Edwin, editor, Han, Sung-Kook, editor, Xu, Cheng-Zhong, editor, Kim, Moon-Hae, editor, Yang, Laurence T., editor, and Xiao, Bin, editor

Published
2006
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38. Improvement of the Naive Group Key Distribution Approach for Mobile Ad Hoc Networks

Author

Lim, Yujin, Ahn, Sanghyun, Hutchison, David, editor, Kanade, Takeo, editor, Kittler, Josef, editor, Kleinberg, Jon M., editor, Mattern, Friedemann, editor, Mitchell, John C., editor, Naor, Moni, editor, Nierstrasz, Oscar, editor, Pandu Rangan, C., editor, Steffen, Bernhard, editor, Sudan, Madhu, editor, Terzopoulos, Demetri, editor, Tygar, Dough, editor, Vardi, Moshe Y., editor, Weikum, Gerhard, editor, Jia, Xiaohua, editor, Wu, Jie, editor, and He, Yanxiang, editor

Published
2005
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39. A Clustering Mechanism with Various Cluster Sizes for the Sensor Network

Author

Lim, Yujin, Ahn, Sanghyun, Hutchison, David, editor, Kanade, Takeo, editor, Kittler, Josef, editor, Kleinberg, Jon M., editor, Mattern, Friedemann, editor, Mitchell, John C., editor, Naor, Moni, editor, Nierstrasz, Oscar, editor, Pandu Rangan, C., editor, Steffen, Bernhard, editor, Sudan, Madhu, editor, Terzopoulos, Demetri, editor, Tygar, Dough, editor, Vardi, Moshe Y., editor, Weikum, Gerhard, editor, Pan, Yi, editor, Chen, Daoxu, editor, Guo, Minyi, editor, Cao, Jiannong, editor, and Dongarra, Jack, editor

Published
2005
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40. Adjusting the Cluster Size Based on the Distance from the Sink,

Author

Ahn, Sanghyun, Lim, Yujin, Lee, Jaehwoon, Hutchison, David, editor, Kanade, Takeo, editor, Kittler, Josef, editor, Kleinberg, Jon M., editor, Mattern, Friedemann, editor, Mitchell, John C., editor, Naor, Moni, editor, Nierstrasz, Oscar, editor, Pandu Rangan, C., editor, Steffen, Bernhard, editor, Sudan, Madhu, editor, Terzopoulos, Demetri, editor, Tygar, Dough, editor, Vardi, Moshe Y., editor, Weikum, Gerhard, editor, Yang, Laurence T., editor, Rana, Omer F., editor, Di Martino, Beniamino, editor, and Dongarra, Jack, editor

Published
2005
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41. An Efficient Multicast Data Forwarding Scheme for Mobile Ad Hoc Networks

Author

Kim, Youngmin, Ahn, Sanghyun, Lee, Jaehwoon, Hutchison, David, editor, Kanade, Takeo, editor, Kittler, Josef, editor, Kleinberg, Jon M., editor, Mattern, Friedemann, editor, Mitchell, John C., editor, Naor, Moni, editor, Nierstrasz, Oscar, editor, Pandu Rangan, C., editor, Steffen, Bernhard, editor, Sudan, Madhu, editor, Terzopoulos, Demetri, editor, Tygar, Dough, editor, Vardi, Moshe Y., editor, Weikum, Gerhard, editor, and Kim, Cheeha, editor

Published
2005
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45. A Simple Load-Balancing Approach in Secure Ad Hoc Networks

Author

Yoo, Younghwan, Ahn, Sanghyun, Hutchison, David, editor, Kanade, Takeo, editor, Kittler, Josef, editor, Kleinberg, Jon M., editor, Mattern, Friedemann, editor, Mitchell, John C., editor, Naor, Moni, editor, Nierstrasz, Oscar, editor, Pandu Rangan, C., editor, Steffen, Bernhard, editor, Sudan, Madhu, editor, Terzopoulos, Demetri, editor, Tygar, Dough, editor, Vardi, Moshe Y., editor, Weikum, Gerhard, editor, Kahng, Hyun-Kook, editor, and Goto, Shigeki, editor

Published
2004
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