김태욱 교수

OBJECTIVE: To investigate the efficacy of fibrin sealant (FS) for reducing postoperative drainage in patients who underwent total thyroidectomy (TT) with bilateral central neck dissection (CND) for papillary thyroid cancer. STUDY DESIGN: Prospective randomized trial. SETTING: Tertiary care institution. SUBJECTS AND METHODS: Seventy-eight patients with papillary thyroid cancer were enrolled and randomized to either the FS application group (FS+, 38 patients) or no FS application group (FS-, 40 pa

Crohn's disease (CD) is a chronic, idiopathic, inflammatory disorder of the gastrointestinal tract. In rare cases, CD has been associated with Hirschsprung's disease (HD); however, the underlying pathophysiology of this and other comorbidities is not yet fully understood. In this report, we describe the case of a 17-year-old patient who was diagnosed with both CD and ankylosing spondylitis (AS), having undergone a long ileo-colonic anastomosis to treat HD at 12 months of age. To our knowledge, t

The surgery-based group achieved equivalent treatment outcomes and slightly better QOL scores than the RT-based group. The results of this study suggest that surgery could still be considered as a first-line therapy for oropharyngeal cancer.

A highly linear CMOS RF amplifier and mixer circuits adopting MOSFET transconductance linearization by linearly superposing several common-source FET transistors in parallel, combined with some additional circuit techniques such as cascode for amplifier and harmonic tuning for mixer, are reported. Experimental result designed using above techniques shows IP3 improvements at given power consumption by as large as 10 dB for RF amplifier at 900 MHz and 7 dB for Gilbert cell mixer at 2.4 GHz without

A low-power highly linear CMOS RF amplifier circuit composed of a Multiple-Gated common-source FET TRansistor (MGTR) in cascode configuration is reported. In an MGTR amplifier, linearity is improved by using transconductance linearization which can be achieved by canceling the negative peak value of g/sub m/" of the main transistor with the positive one in the auxiliary transistor having a different size and gate drive combined in parallel. This enhancement, however, is limited by the distortion

A simple and analytical design approach for input power matched CMOS RF LNA circuits and their scaling for lower power consumption, is introduced. In spite of the simplicity of our expressions, it gives excellent agreement with numerical simulation results using commercial CAD tools for several circuit examples performed at 2.4GHz using 0.18µm CMOS technology. These simple and analytical results are extremely useful in that they can provide enough insights not only for designing any CMOS LNA cir

A CMOS RF digitally programmable gain amplifier, covering various terrestrial mobile digital TV standards (DMB, ISDB-T, and DVB-H) is implemented. 13 dB IIP3 improvement is attained without losing out on other performance criteria like gain, NF, CMRR, etc. at similar power consumption. This is achieved by applying a newly proposed differential circuit gm" cancellation technique. The IC exhibits 55 dB gain range with 0.25 dB resolution, 4.5 dB NF; a -4 dBm IIP3 (maximum 30 dBm) and 25 dB gain at

Regardless of main treatment modalities, an over-expression of p16 (HPV infection) is associated with a lower recurrence in tonsil cancers. However it is not associated with simple HPV presence or p53 and EGFR over-expression.

A CMOS LNA supporting multiple mobile video standards (MediaFLO, DVB-H, and ISDB-T) is implemented using a 0.18 mum CMOS process. The LNA uses a novel feedback configuration and implements an RF elliptic low-pass filter (LPF) response. Because of this elliptic LPF response, the receiver is able to operate concurrently with radio transmitter leakage from GSM, DCS, WLAN, and Bluetooth. The design decouples the feedback path from the main path to allow integration of the LPF as well as obtain wideb

The IR-UWB sensor could measure the CCD accurately both on the floor and on the foam mattress.

A new mixer linearization method is proposed, along with a method for optimizing an integrated inductor for a single balance mixer LO buffer with respect to power consumption and silicon area. With the proposed linearization technique and inductor optimization method, we can obtain a state-of-the-art low power 890 MHz cellular CDMA mixer compared with other published and commercially available products. The proposed mixer is fabricated in a 0.35 /spl mu/m SiGe BiCMOS process and measurement resu

A high output power CMOS transmitter is proposed for 60GHz communication system. In order to obtain high output power in millimeter wave frequency range, many PAs (Power Amplifier) with antennas are integrated in a single transmitter. The total output power (P <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">tot</sub> ) of Multi (N) PAs with antenna which is spaced within wavelength is equivalent to the summation of output power (P <sub xmlns:mml="ht