국가간 상대적 경제규모가 무역량과 산업내무역에 미치는 영향 ; 시계열과 횡단면 분석 ( 경제학문헌목록 주제분류 : F1 )

김태기,장선미 ( Tae Gi Kim,Sun Mee Chang ) 한국경제학회 1998 經濟學硏究 Vol.46 No.3

본 논문은 이론모형을 통해 국가간 경제규모와 요소부존도의 차이가 무역량과 산업내무역 에 미치는 영향을 도출하고, 이를 1970-1994 기간에 걸친 세계 82개국의 소득통계와 무역통 계를 이용하여 실증적으로 검증하고 있다. 이론모형에 의하면, 국가간 경제규모의 유사성이 클수록 총무역량과 산업내무역지수는 증가하고, 또 국가간 요소부존도의 차이가 클수록 산업내무역은 감소하고, 총무역량은 약하지만 증가한다. 시계열 상관분석과 횡단면 회귀분석의 결과는 두 국가간의 경제규모의 차이와 요소부존도의 차이에 의해 무역량과 산업내무역이 결정 된다는 이론모형의 가설이 타당함을 보여준다.

전방깊이 및 전방각 측정에서 앉은 자세로 촬영된 초음파생체현미경의 유용성

김태기,문성운,양지호,진경현,Tae Gi Kim,Sung Woon Moon,Ji Ho Yang,Kyung Hyun Jin 대한안과학회 2014 대한안과학회지 Vol.55 No.7

<b>Purpose:</b> We compared the measurements of anterior chamber depth (ACD) and anterior chamber angle (ACA) using ultrasound biomicroscopy (UBM) in the sitting position compared with IOL Master<sup>Ⓡ, Pentacam<sup>Ⓡ, and Spectralis optical coherence tomography (OCT) to evaluate the clinical usefulness of UBM in the sitting position. <b>Methods</b>: We evaluated 92 eyes in 47 healthy adults. ACD was measured by IOL Master<sup>Ⓡ, Pentacam<sup>Ⓡ, and UBM. ACA was measured using Pentacam<sup>Ⓡ, UBM, and Spectralis OCT. UBM was performed in the sitting position using bag/balloon technology. Measured values were compared statistically. <b>Results</b>: ACD measured by IOL Master<sup>Ⓡ, Pentacam<sup>Ⓡ, and UBM was 3.57 ± 0.32 μm, 3.64 ± 0.33 μm and 3.51 ± 0.32 μm, respectively. UBM measurements of ACD were significantly shallower than with the other methods (<em>p</em> < 0.001). The results among the 3 methods were strongly correlated (<em>r</em> > 0.8, <em>p</em> < 0.05 in all groups). Mean ACA of 4 directions was not significantly different among the 3 methods (<em>p</em> > 0.05). There was strong correlation between UBM and Spectralis OCT (<em>r</em> = 0.957) but moderate correlation between Pentacam<sup>Ⓡ and UBM and Pentacam<sup>Ⓡ and Spectralis OCT (<em>r </em>= 0.557, 0.571, respectively, <em>p</em> < 0.05). Specifically, ACA of the superior quadrant showed a low correlation between Pentacam<sup>Ⓡ and UBM and Pentacam<sup>Ⓡ and Spectralis OCT (<em>r</em> = 0.257, 0.295, respectively). <b>Conclusions:</b> ACD measured by UBM in the sitting position was shallower compared to the other methods; however, ACD measured by IOL Master<sup>Ⓡ, Pentacam<sup>Ⓡ, and UBM showed significant correlations among the methods. The mean ACA measured by Pentacam<sup>Ⓡ, UBM, and Spectralis OCT showed no significant differences. Due to the high correlation of ACA measurements between UBM and Spectralis OCT in the present study, UBM is expected to be a good tool for measuring anterior segment parameters. J Korean Ophthalmol Soc 2014;55(7):1007-1016

한국 자동차산업의 산업내무역과 산업정책

김태기,손용엽 ( Tae Gi Kim,Yong Yeop Sohn ) 한국경제학회 1994 經濟學硏究 Vol.41 No.3

시호사물탕이 t-BHP로 유도된 간세포의 산화적 손상 및 자유기에 의한 지질과산화 반응에 미치는 영향

김태기,박선동,문진영,Kim Tae-Gi,Park Sun-Dong,Moon Jin-Young 대한한의학방제학회 2000 大韓韓醫學方劑學會誌 Vol.8 No.1

Sihosamultang(SST) has been used for the treatment of puerperal fever, liver disease in traditional medicine. The present study was carried out to evaluate the antioxidant effects of SST extract in vitro. The inhibitory effect of SST extract on lipid peroxidant was examined in the linoleic acid autoxidation system. In this test, SST extract significantly inhibited the time course of the lipid peroxidation. And SST extract showed about 73% scavenging effect on DPPH radical. And this extract inhibited not only the lipid peroxide formation induced by hydroxyl radical derived from $ H_{2}O_{2}-Fe^{2+}$ in the rat liver homogenate, but also the superoxide generation from xanthine-xanthine oxidase system in a dose-dependent manner. In addition, SST extract protected the hepatic cell death induced by tert-butyl hydroperoxide. These data indicated that SST might play a protective role against oxidative injury by free radicals.

대학교육 개혁에 있어서 시장경제 논리의 적용과 보완

김태기,Kim, Tae-Gi 한국대학교육협의회 1998 大學敎育 Vol.94 No.-

재미 교포경제와 한국과의 경제교류 가능성 분석

김태기(Tae-gi Kim) 전남대학교 글로벌디아스포라연구소 2004 전남대학교 세계한상문화연구단 국제학술회의 Vol.2004 No.4

중산층 감소와 정책 공백의 개선방향

김태기(Taigi Kim) 한국고용노사관계학회 2017 産業關係硏究 Vol.27 No.2

본 논문은 중산층 감소와 중산층정책의 공백 원인을 국내외 연구를 활용해 조사하고 개선방향을 제시한다. 한국은 강력한 중산층정책을 통해서 경제성장과 소득분배의 개선에 성공했다. 그러나 기술혁신과 세계화가 중산층의 분화 및 감소를 야기하고, 시장자유화는 중산층 지원을 위한 정부의 역할을 축소시켰다. 외환위기 이후 중산층의 감소를 막기 위한 복지정책의 강화에도 불구하고 중산층 감소와 중산층정책의 공백 문제는 악화되었다. 학력이 높아진 신중산층의 증가는 민주화와 노동운동의 동력이 되었지만 정치제도의 변화가 생산물시장 및 노동시장의 변화와 조화되지 못해 중산층 감소와 정책의 공백은 지속되었다. 산업과 고용의 이중구조는 중산층의 분화 및 감소를 지속시킨 반면, 중산층 감소에 따른 정치사회 불안의 증대는 유권자의 지각을 왜곡시켜 중산층정책의 개선과 정책의 일관성 확보를 어렵게 만들었다. 이러한 문제를 해결하기 위해서는 정치와 경제여건의 변동에 따라 정부가 자의적으로 개입해 중산층 감소에 대응하기보다 기업의 혁신과 교육 그리고 사회복지를 노동시장시스템의 관점에서 통합적으로 접근하고 정책의 목표를 고용률과 임금 및 생산성 그리고 사회이동성을 제고하는데 두는 신중산층정책을 추진할 필요가 있다. This paper discusses reasons and problems for middle class policies to be hollowed out and suggests the direction to reform them by applying the related research outcomes of labor economics, political economy and behavior economics on middle class. Korea had achieved both economic growth and income equality owing to strong middle income policies until the 1980s. Even though economic growth and income equality have deteriorated since the 1990s, middle income policies have retreated as market liberalization has been emphasized. In addition, democratization and political instability have reduced concerns for middle class. Like advanced countries Korea has seen technological innovation and globalization to cause job polarization and division of middle class to raise voters’ misperception on middle class policies. Both market failure due to dual economy and political institutions’ failure have brought vicious cycle between changes in middle class and labor market making middle class policies hollowed-out. Since political instability make middle class policies difficult to keep consistency and sustainability, it is necessary to focus on building labor market systems to raise both employment rate and labor productivity as well as to strengthen social mobility.

수출품의 품질 변화가 수출가격과 수출점유율에 미치는 영향: 미국의 수입통계를 이용한 분석

김태기(Taegi Kim) 한국무역연구원 2019 무역연구 Vol.15 No.4

Purpose - This paper analyzes the effect of quality change on export price and export market share. We used U.S. import data classified with HS 6-digit covering the period from 1995 to 2015. Design/methodology/approach - The quality index was estimated by using the ranks of export prices by country. Findings - Results show that countries with higher income levels are exporting better-quality products, and countries that are geographically far away are exporting better-quality products. Overall, there is a positive relationship between price and quality. However, increases in prices reduce market share, but increases in product quality contribute to increases in market share. An increase of 10% in quality increases the export share by 2.65-2.83%. As in other studies, the larger economies have higher market shares, and the countries with longer distances have lower market shares. Research implications or Originality - Finally, the regression analysis reveals that Korean products are of better quality than those of other countries similar to Korea, and because of such better quality, Korea has a relatively greater market share than other countries.

넓은 온도 범위에서 고정 구동전류로 동작하는 1.25 Gbps 850 ㎚ 산화형 VCSEL 송신기의 특성

김태기(Taeki Kim),김태용(Taeyong Kim),김상배(Sang-Bae Kim),김성한(Sunghan Kim) 대한전자공학회 2007 電子工學會論文誌-SD (Semiconductor and devices) Vol.44 No.12

넓은 온도 범위에서 고정된 구동 전류로 동작하는 VCSEL(Vertical-Cavity Surface-Emitting Laser) 송신기의 저전류 동작 특성을 살펴보았다. 사용된 VCSEL은 산화형 850 ㎚ 레이저로, d²Ith/dT²값이 약 1.346×10?⁴ mA/℃² 으로 문턱전류의 온도의 존성이 비교적 낮은 것이었으며, 데이터 속도는 1.25 Gbps였다. 칩 상태에서의 광출력-전류-전압을 측정하여 20℃에서의 광출력이 1 mW가 되는 전류를 on 전류로 설정한 후 -20℃에서 80℃의 온도 범위에서 20℃ 간격으로 온도를 바꾸어가며 off 전류의 변화에 따른 turn-on 특성, turn-off 특성 그리고 eye-diagram을 관찰하였고 온도와 off 전류에 따라 eye-diagram에서 rise time, fall time, extinction ratio, timing jitter가 어떻게 변화하는지를 살펴보았다. 그 결과 최소 문턱전류보다 약 0.1~0.2mA 정도 낮게 off 전류를 설정하면 20℃에서 80℃의 온도 범위에서 off 전류와 on 전류를 변화시키지 않고 1.25 Gbps에서 송신기로 동작 시킬 수 있음을 확인하였다. We have analyzed low current operation characteristics of a VCSEL transmitter operating at fixed current over wide temperature range. Used 850 nm oxide VCSEL has low temperature dependence of the threshold current and d²Ith/dT² is approximately 1.346×10?⁴ mA/℃². We fixed on-current so that output power from the chip is 1 mW at 20℃ and investigated the turn-on, turn-off characteristics and eye-diagram of the 850 nm oxide VCSEL transmitter with varying ambient temperature and off-current. We measured rise time, fall time, extinction ratio and timing jitter by changing the ambient temperature and off-current. With the fixed off-current of around 0.1~0.2 mA lower than the lowest threshold current the transmitter successfully operated at 1.25 Gbps over a wide temperature range from 20℃ to 80℃.

균등전계 중에 놓인 침상 전극의 끝단에서 발생한 직류 코로나방전 특성

김태기(Tae-Ki Kim),김승민(Seung-Min Kim),이복희(Bok-Hee Lee) 한국조명·전기설비학회 2015 조명·전기설비학회논문지 Vol.29 No.11

In the measurement of atmospheric static electric field, it is important to know characteristics of corona discharges caused at the tip of test electrode. This paper presents the fundamental data of DC corona discharges that occurred at the tip of a needle-shaped electrode placed in the homogeneous background electric field which simulates the atmospheric static field under thundercloud. The major characteristics of interest for this purpose are the polarity effect of corona discharges and the magnitudes and time intervals of corona current pulses. The experimental set-up consists of the plate-to-plate configuration with a needle-shaped protrusion, DC power supply, and voltage and current measuring devices. As a result of experiments, the polarity dependence of corona pulses is significantly pronounced. The time intervals between successive corona pulses in the negative polarity is much longer than those in the positive polarity. The time intervals for both polarities is drastically decreased as the applied electric field is increased. Also the magnitudes of the positive corona pulses are slightly changed with an increase in applied electric field, but those of the negative corona pulses are linearly increased with increasing the applied electric fields.