정재훈 교수

Auxin and brassinosteroid (BR) play essential roles in diverse aspects of growth and developmental processes in plants mainly through coordinate regulation of cell divi-sion, elongation, and differentiation. Consistent with the overlapped roles, accumulating evidence indicates that the two growth hormones act in a synergistic as well as in an interdependent manner in many cases, although the un-derlying molecular mechanisms are not fully understood. Here, we demonstrate that auxin and BR signali

The plant vascular system is a complicated network of conducting tissues that interconnects all organs and transports water, minerals, organic compounds, and various signaling molecules throughout the entire organism. This system is composed of two major tissue types – xylem and phloem – that originate from the vascular meristem, i.e., the procambium. Recently, combined applications of molecular genetics and genomics tools have provided significant insights into the underlying mechanisms by whic

Abstract Arabidopsis flowering is dependent on interactions between a component of the florigens FLOWERING LOCUS T (FT) and the basic leucine zipper (bZIP) transcription factor FD. These proteins form a complex that activates the genes required for flowering competence and integrates environmental cues, such as photoperiod and temperature. However, it remains largely unknown how FT and FD are regulated at the protein level. To address this, we created FT transgenic plants that express the N‐term

Preparation for radioactive iodine (RAI) therapy includes an increased serum thyroid stimulating hormone level and a low iodine diet (LID). Because of extremely high iodine intake, some physicians have advocated a more stringent LID for greater than 2weeks in Korean patients with thyroid cancer prior to RAI therapy; however, it is very difficult to maintain a stringent LID for a longer period of time. According to recent reports in Korea, a nonstringent, simple LID for only 1 week might be enoug

The incidence of thyroid cancer has been increasing in Korea as well as in many countries. This is mainly due to the early detection of papillary thyroid microcarcinoma less than 1 cm in diameter with a high-resolution ultrasonography. Because of the unique Korean medical environment, its incidence is abruptly increasing in Korea. Many experts have emphasized that the early detection cannot completely explain the observed increase in thyroid cancer. Therefore, other possible explanations should

In the shipbuilding process, the confined work spaces of the ship are formed continuously; the ventilation method can therefore be limited to dilution ventilation due to the complex structure and limited opening of the confined space. Also, it is difficult to evaluate air-quality using measurement and an adequate ventilation method. CFD simulation methods are typically used in analyzing ventilation efficiency in these cases. In this study, a method is suggested to analyze the air quality of the

Upon ultraviolet-B (UV-B) exposure, the photoreceptor UVR8 translocates to the nucleus and interacts with COP1 to activate downstream transcription factors, notably including HY5. However, the mechanism of UVR8 nuclear import has remained unclear 1,2 . Here, we identified HOS1, a component of the nuclear pore complex (NPC), as a key mediator of UVR8 nuclear translocation under UV-B conditions. HOS1 directly interacts with UVR8 specifically in response to UV-B, facilitating its efficient import i

본 논문에서는 주어진 코드 진행에서 비화성음을 활용한 화려한 멜로디를 자동으로 생성하는새로운 진화적 자동 음악 작곡 시스템을 제안한다. 전체 시스템은 리듬 생성과 멜로디 생성의 두 단계로나누어지며, 사용자 설정 파라미터로 제어되는 리듬 적합도 평가 함수와 화성학 기반으로 설계된 멜로디적합도 평가 함수, 그리고 멜로디 최적화 성능 향상을 위해 설계된 음악적 문맥을 고려한 진화연산을 소개한다. 제안하는 리듬 적합도 평가 함수의 최적화에서 표준 유전알고리즘과 엘리티즘이 적용된 유전알고리즘, 차분진화 알고리즘, 그리고 입자군집최적화 알고리즘의 비교 실험을 하였으며, 멜로디 적합도 평가함수 최적화에서 위 4가지 알고리즘과 제안하는 진화연산을 적용한 유전알고리즘과의 비교 실험을 통해성능을 검증하고, 생성된 멜로디에 대한 음악적 분석을 수행하였다.