Bomi Song

Food intake in the nematode Caenorhabditis elegans requires two distinct feeding motions, pharyngeal pumping and isthmus peristalsis. Bacteria, the natural food of C. elegans, activate both feeding motions (Croll, 1978; Horvitz et al., 1982; Chiang et al., 2006). The mechanisms by which bacteria activate the feeding motions are largely unknown. To understand the process, we studied how serotonin, an endogenous pharyngeal pumping activator whose action is triggered by bacteria, activates feeding

Familiarity discrimination has a significant impact on the pattern of food intake across species. However, the mechanism by which the recognition memory controls feeding is unclear. Here, we show that the nematode Caenorhabditis elegans forms a memory of particular foods after experience and displays behavioral plasticity, increasing the feeding response when they subsequently recognize the familiar food. We found that recognition of familiar food activates the pair of ADF chemosensory neurons,

Many visual animals exploit spectral information for seeking food and mates, for identifying preys and predators, and for navigation. Animals use chromatic information in two ways. "True color vision," the ability to discriminate visual stimuli on the basis of their spectral content independent of brightness, is thought to play an important role in object identification. In contrast, "wavelength-specific behavior," which is strongly dependent on brightness, often associates with foraging, naviga

Motor control is a complex process that requires interplay among the nervous system, muscles and environment. The simple anatomy, well-characterized muscle movements and ample resources for molecular and cellular dissection make the pharynx of the nematode C. elegans an attractive model system for the study of motor control. The C. elegans pharynx shows two clear muscle movements that are essential for food intake, pharyngeal pumping and isthmus peristalsis. Here, we review our recent findings o

Eco friendly management has received attention from business as an important competitive source. Thus, an emerging body of studies is interested in the implementation of green supply chain management (GSCM). Previous research in this field has acknowledged the importance of GSCM. However, the capability that enables a firm to successfully adopt GSCM is not well researched. This study empirically examines dynamic capability as an antecedent of GSCM, with the aim of proposing a causal relationship

Corporate social responsibility (CSR) involves multiple activities and is influenced by the cultural and legal environment of the country in which a firm is located. This study examines the role of audit committees’ (AC) financial expertise in the relationship between CSR and the earnings quality of Korean firms with high levels of CSR. Using a multivariate analysis, it investigates whether the ACs that include members with accounting expertise, finance expertise, or supervisory expertise indivi

Corporate social responsibility (CSR) activities are affected by the national system, and the social and cultural environment to which a firm belongs. This study investigates whether the characteristics of an audit committee (AC) such as independence, expertise, activity, or power influence the relation between CSR and earnings quality for Korean firms. Multivariate regression analysis is used to identify the effect of AC characteristics on the relation between CSR and the earnings management of

Using listed firms with audit committees in the Korea Composite Stock Price Index (KOSPI) market, we find that firms with a politically connected audit committee have higher earnings quality than those without such connections. We also find that firms with a politically connected audit committee have better access to equity financing, but obtain a larger amount of funds only when their earnings quality is higher. Overall, contrary to popular concerns over the negative influence of political conn

선행연구들은 선도형 경영전략을 사용하는 기업들이 방어형 경영전략을 사용하는 기업들보다 더욱 공격적으로 이익의 상향조정을 수행한다고 보고한 바 있다. 본 연구에서는 우수한 특성을 가진 감사위원회가 이러한 경영전략-이익조정 수준 사이의 관계에 영향을 미치는지를 살펴보았다. 감사위원회가 본연의 역할을 제대로 수행한다면, 선도형 경영전략을 사용하는 경영자의 공격적 이익조정 행위를 억제할 것으로 예측되기 때문이다. 실증분석 결과에 따르면, 선행연구의 발견과 일관되게 선도형 경영전략을 사용하는 기업들이 이익의 상향조정을 하는 경향이 더 높다는 것을 발견하였다. 또한 우수한 특성을 가진 감사위원회(독립성, 전문성, 활동성, 이사의 힘으로 측정)는 이러한 경영전략-이익조정 수준 사이의 유의적인 관계를 약화시키는 것으로 드러났다. 그 결과 우수한 특성을 가진 감사위원회를 보유한 기업에서는, 선도형 경영전략을 사용하는 기업이라도 다른 기업들 보다 이익조정을 더 많이 수행한다는 증거를 발견할 수 없었다

Purpose: The aims of this study are to investigate the joint effects of financial experts on audit committees (ACs) and industry expert auditors on earnings quality, and to investigate whether the joint effects differ based on subtypes of financial experts on ACs and the mixture of those subtypes. Design/methodology/approach: This study measures AC financial expertise and auditor industrial expertise using indicator variables. To measure the quality of earnings, this study employs the approach o