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Woohyung Chun,Sungroh Yoon,Sangjin Hong IEEE 2011 IEEE transactions on very large scale integration Vol.19 No.5
<P>This paper presents a methodology for reducing interconnect resources in reconfigurable platforms such as field-programmable gate arrays (FPGAs). This methodology utilizes the techniques developed for the buffer-based dataflow, a new design representation suitable for implementing data-centric applications in a reconfigurable platform. In a buffer-based dataflow, nodes correspond to processing blocks and buffer controllers represent the interconnects between the processing blocks. Since we can isolate the functional execution and data transfer of each node by using buffer controllers, a buffer-based dataflow is helpful for reducing overall design time and for increasing reconfigurability. In this paper, we propose a sharing methodology that can reduce the buffer memory and the number of buses used in the realization of a buffer-based dataflow. By reducing the resources allocated to buffer controllers, we can achieve interconnect resource reduction. The proposed sharing methodology can increase the dynamic energy consumption due to the increased port-loading capacitance. By using the energy consumption model determined by the costs of buffers and buses, we investigate whether the sharing case with the minimum resources corresponds to the sharing case consuming the minimum energy or not. We evaluate the proposed sharing methodology with the dataflow graphs representing data-centric applications such as SIRF, IPv4, MC-CDMA transmitter and receiver.</P>
Metastatic follicular struma ovarii complicating pregnancy
Woohyung Lee,Nam-Joon Yi,Hyeyoung Kim,Youngrok Choi,Minsu Park,Geun Hong,June Young Choi,Hyun Hoon Chung,Kwang-Woong Lee,Do-Joon Park,Hye Sook Min,June-key Chung,Kyung-Suk Suh 한국간담췌외과학회 2012 한국간담췌외과학회지 Vol.16 No.3
A 35-year-old woman was determined to have an ovarian cyst and underwent a right ovarian cystectomy at 10 weeks of gestation. A histopathological examination revealed follicular carcinoma arising in a teratoma. No evidence of metastasis was found after delivery. She underwent a total thyroidectomy, followed by radioactive iodine (RAI) therapy. However, her serum thyroglobulin level increased to 1,437 ng/ml (normal range: 0-52 ng/ml) after 10 months. Radioiodine scintigraphy and abdominal computed tomography revealed liver metastasis and peritoneal seeding. She underwent debulking surgery of the liver, right salpinx, and peritoneal seeding nodules. A pathological examination showed metastatic follicular carcinoma with focal poorly differentiated features. Adjuvant RAI therapy was restarted, and her serum thyroglobulin levels returned to normal. In conclusion, metastatic lesions were successfully treated with a combination of debulking surgery and RAI therapy. Close medical follow-up monitoring serum thyroglobulin levels is mandatory in such patients.
Feature Compensation Incorporating Modeling Error Statistics
Woohyung Lim,Nam Soo Kim IEEE Signal Processing Society 2007 IEEE signal processing letters Vol.14 No.7
<P>In this letter, we propose a novel approach to feature compensation for robust speech recognition in noisy environments. We analyze the error distribution of speech corruption model in the log spectral domain and represent the statistics as functions with respect to the signal-to-noise ratio. The proposed algorithm incorporates modeling error statistics into the interacting multiple model technique and shows a performance improvement over the AURORA2 speech recognition task.</P>
Woohyung Lee,Sung-Sik Han,Seung Duk Lee,Young-Kyu Kim,Seong Hoon Kim,Sang Myung Woo,Woo Jin Lee,Young Whan Koh,Eun Kyung Hong,Sang-Jae Park 한국간담췌외과학회 2012 한국간담췌외과학회지 Vol.16 No.2
Bouveret’s syndrome is a gastric outlet obstruction caused by an impacted gallstone that passes through a cholecysto-gastric or cholecysto-duodenal fistula. An elderly woman visited a local clinic with nausea and abdominal pain. Abdominal computed tomography revealed a stone that was impacted in the duodenal lumen and a fistula between the gallbladder and duodenum. Malignancy could not be excluded due to the mass in the cystic duct showing enhancement and the presence of enlarged lymph nodes on computed tomography, and increased fludeoxyglucose uptake in the cystic duct on positron emission tomography. The patient underwent simultaneous cholecystectomy, segmental duodenectomy and gastro-jejunostomy. Pathological examination exhibited chronic inflammation and no primary cancer of the gallbladder and fistula. (Korean J Hepatobiliary Pancreat Surg 2012;16:84-87)