• 한국자원식물학회:학술대회논문집
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• 한국자원식물학회 2023년도 임시총회 및 춘계학술대회
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• pp.62-62
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• 2023

Zanthoxylum piperitum ("chopi" in Korean) has been used as traditional medicinal plants with high anti-inflammatory, antioxidant, and antifungal activities. The aims of the study were to identify marker compounds and to investigate metabolites variation of chopi according to different parts and harvest times. Every month from June to September, chopi were harvested with three different parts: leaves, leaf-twig mixtures, twigs. Using liquid chromatography-tandem mass spectrometry (LC-MS/MS), two main marker compounds (quercitrin and quercetin-3-O-glucoside) were characterized in 70% ethanol extracts of chopi. Quantification of the two marker compounds were subsequently conducted by high performance liquid chromatography (HPLC), representing that contents of these compounds were higher in leaves and leaf-twig mixtures rather than twigs. For the comprehensive analysis of metabolites associated with production of marker compounds, 35 primary metabolites were identified using gas chromatography-mass spectrometry (GC-MS). Multivariate analysis results represented that plant parts were main contributors to the separation of chopi. However, significant differences were not observed between leaves and leaf-twig mixtures samples. The partial least square (PLS) predictive model revealed that monosaccharides (fructose, galactose, glucose, mannose, xylose) and branched-chain amino acids (isoleucine, valine, leucine) were important determinants for the production of marker compounds together with alanine, inositol, GABA, and theronic acid. This study could be extended to stabilize and utilize chopi as an industrial material, as well as to find good candidates with various nutritional traits.

• 무역학회지
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• 제46권5호
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• pp.195-211
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• 2021

The purpose of this study is to examine the relationship among innovation activities, innovation performance, and management performance of export firms. I first undertake a review of previous studies related to innovation activity, innovation performance, and export firms' innovation. Based on this, I set up a research model and hypotheses. First, The innovation activity is classified into product innovation activity, process innovation activity, and administrative innovation activity. Innovation performance is divided into product quality improvement and cost reduction. And the business performance is regarded as financial performance of export's firms. This study examined whether innovation activity affect innovation performance such as product quality improvement and cost reduction. In addition, I examined whether these innovation performance affects business performance (financial performance). To achieve this, a total of 368 questionnaires are used in this study and PLS (Partial Least Square) was used to analyze structural equation. As a result, this study shows that product innovation activity have a positive effect on product quality improvement, and process innovation activity also have a positive effect on product quality improvement. However, it was found that neither product innovation activity nor process innovation activity had an effect on cost reduction. And it was found that administrative innovation did not affect product quality improvement, but had a positive effect on cost reduction. Also, it was found that quality improvement, which is an innovation performance, did not affect the financial performance of export's firms, and cost reduction, which is an innovation performance, had a positive effect on the financial performance of the export's firms.

• 한국축산식품학회지
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• 제43권6호
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• pp.1150-1169
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• 2023

Edible insects are gaining popularity as a potential future food source because of their high protein content and efficient use of space. Black soldier fly larvae (BSFL) are noteworthy because they can be used as feed for various animals including reptiles, dogs, fish, chickens, and pigs. However, if the edible insect industry is to advance, we should use automation to reduce labor and increase production. Consequently, there is a growing demand for sensing technologies that can automate the evaluation of insect quality. This study used short-wave infrared (SWIR) hyperspectral imaging to predict the proximate composition of dried BSFL, including moisture, crude protein, crude fat, crude fiber, and crude ash content. The larvae were dried at various temperatures and times, and images were captured using an SWIR camera. A partial least-squares regression (PLSR) model was developed to predict the proximate content. The SWIR-based hyperspectral camera accurately predicted the proximate composition of BSFL from the best preprocessing model; moisture, crude protein, crude fat, crude fiber, and crude ash content were predicted with high accuracy, with R² values of 0.89 or more, and root mean square error of prediction values were within 2%. Among preprocessing methods, mean normalization and max normalization methods were effective in proximate prediction models. Therefore, SWIR-based hyperspectral cameras can be used to create automated quality management systems for BSFL.

• 유통과학연구
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• 제22권2호
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• pp.41-50
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• 2024

Purpose: This study aims to identify the distribution of skill evolution for accounting personnel during the health crisis and investigate the impact of accounting skills in developing resilience among accounting personnel. Research design, data, and methodology: A total of 131 respondents of accounting personnel participated in a self-administered survey questionnaire. This data is analysed using the partial least square structural equation modeling. Results: The results show that accounting skills, digital skills, and writing skills have a significant impact on developing accounting personnel's motivation, subsequently leading to resilience. Conclusions: This study adds to the literature on the new requirements and future profiles of Malaysian organisation and the accounting profession. This will be a good reference for the practitioners to identify the relevant skills required for accountants after the pandemic. Furthermore, this study includes encouraging motivation and skills to improve resilience in the Malaysian context further to understand the push factors on skills evolution among the accountants. Higher education institutions with accounting courses would consider the potential future skills of accountants to meet market demands on time when updating the institutions' curricula program. Hence, the relevant skills required can be developed and practiced at the education level, especially secondary and tertiary levels.

• Journal of Plant Biotechnology
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• 제45권3호
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• pp.250-256
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• 2018

한약자원 약용부위와 대사체 수준에서 동등성이 규명된다면 식물조직배양을 통한 약용자원의 대량증식은 한약자원 약용부위의 보다 안전하고, 지속적인 대체 공급수단으로 활용이 가능하다. 따라서 본 연구에서는 기원 검증이 이루어진 백수오 약용부위와 동일조직에서 유래된 부정근으로부터 전세포추출물의 FT-IR스펙트럼 분석을 통해 대사체 수준에서의 동등성을 비교분석함으로써 한약자원 약용부위의 대체 공급수단으로 활용 가능성을 검증하고자 하였다. 식물생장조절제인 IBA 농도별 백수오 부정근의 생장률 분석 결과 5 mg/L IBA 첨가 배지에서 백수오 부정근 증식이 가장 우수하였다. SA 처리의 경우 처리 농도가 증가함에도 불구하고 백수오 부정근의 생장에는 차이가 없었지만, MeJA 처리시 농도가 높아질수록 부정근이 갈변되고 생장이 감소하였다. Elicitor 처리된 백수오 부정근 및 표준 약용부위 시료로부터 FT-IR 스펙트럼 데이터의 PCA 와 PLS-DA 분석결과 $400{\mu}M$ MeJA를 제외한 모든 처리구에서 백수오 기내 생산 부정근과 표준 약용부위 시료들 사이에서 전체 대사체 패턴이 매우 유사함을 알 수 있었다. 따라서 본 연구에서 확립된 FT-IR 스펙트럼기반 다변량통계분석 기술은 다양한 한약자원 약용부위 시료들의 대사체 수준 동등성을 신속하게 식별하는 수단으로 활용이 가능할 것으로 기대된다.

• 지식경영연구
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• 제22권4호
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• pp.261-282
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• 2021

워라밸(Work Life Balance)을 중시하는 MZ세대가 조직 구성원이 되면서 목표 달성과 회사 이익 중심의 리더 지향 리더십은 중장기적으로 조직에서 좋은 성과를 내기 힘들어졌다. 회사는 조직 구성원들이 스스로 움직이는 셀프리더십과 구성원들의 직무만족과 조직몰입을 제고할 수 있는 리더십을 강화해야 한다. 하지만 선행연구에서는 팀장, 팀원, 경영자의 리더십을 한꺼번에 연구한 논문이 많지 않았다. 이에 본 연구는 팀장의 서번트리더십이 팀원의 셀프리더십과 조직효과성에 미치는 영향을 분석하였다. 또한 경영자의 감성리더십이 팀장의 서번트리더십과 상호작용을 하여 팀원의 셀프리더십에 조절효과가 있는지를 연구하였다. 또한 MZ세대와 비 MZ세대간의 경로계수에 대한 차이를 검증하였다. 이를 위해 PLS(Partial Least Square) 구조방정식을 이용하여 연구모형을 통계적으로 검증하였다. 온라인으로 직장인 중 357명의 팀원을 대상으로 설문을 수집하였다. 분석 결과 팀장의 서번트리더십은 조직효과성과 팀원의 셀프리더십에 유의한 영향을 미쳤으며, 팀원의 셀프리더십은 조직효과성에 유의한 영향을 끼쳤고 팀장의 서번트리더십과 조직효과성 간에 유의한 매개효과를 나타냈다. 또한 팀장의 서번트리더십과 팀원의 셀프리더십 간의 관계에서 경영자의 감성리더십이 정(+)의 조절 효과가 있었다. MZ세대는 팀장의 서번트리더십이 팀원의 셀프리더십에 긍정적 영향을 주는 경로와 팀원의 셀프리더십이 팀장의 서번트리더십과 조직효과성 사이에서 매개효과가 있는 경로에서 비 MZ세대와 차이가 있었다. 이러한 연구의 결과는 회사 내 경영자, 팀장, 팀원이 각자의 위치에서 조직효과성을 높이는 리더십을 개발할 수 있도록 다양한 이론적, 실무적 시사점을 제시할 것이다.

• Asia Marketing Journal
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• 제13권3호
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• pp.183-208
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• 2011

기존의 리더십과 관련된 연구들은 대부분 조직 내부의 부하와 상사간 관계에 초점을 맞추고 있다. 이는 조직간 거래관계가 기업의 주요한 성패요인이 된 현시점에서 조직 간 리더십에 대한 연구의 필요성을 제기하는 현상이라 할 수 있다. 특히, 조직 간 거래관계가 분석의 초점인 공급체인 연구에서는 이러한 조직 간 리더십에 대한 연구가 더욱 필요하다 할 수 있다. 따라서 공급체인의 조직간 리더십을 연구하는 것은 매우 중요하다 할 수 있다. 하지만 기존 공급체인 리더십 관련 연구들은 두가지 중요한 문제점을 가지고 있다. 첫째, 대부분의 연구들이 공급체인 리더십과 성과 간의 관계에 초점을 맞추고 있다는 점이고, 둘째, 기존 공급체인 내 조직간 리더십 연구들은 리더십과 재무성과 간 관계를 거의 다루지 않았다는 점이다. 이에 본 연구는 공급체인 리더십의 선행변수를 발견하고, 리더십-성과 간 관계에 영향을 미칠 가능성이 있는 조절변수를 실증하였다. 특히, 본 연구에서 관심이 있는 공급체인 리더십의 선행변수는 최근 그 중요성이 강조되고 있는 관계적 행동 변수를, 리더십-성과 간 관계의 조절변수로는 리더의 윤리성을 검정하였다. 국내 5대 편의점에 상품을 공급하는 공급업체 납품담당자 217명을 대상으로 설문조사를 실시하였고, PLS(Partial Least Square) 분석방법을 통해 분석한 결과 대형 유통업체의 관계적 행동 중 교육훈련, 공정한 보상, 조직간 의사소통은 공급체인 리더십을 강화하였고, 공급체인 리더십은 공급업체의 재무성과를 강화하는 것으로 나타났다. 또한 대형 유통업체의 윤리성이 높은 경우 공급체인 리더십이 공급업체 재무성과를 더 강화시키는 것으로 나타났다. 반면 대형 유통업체의 관계적 행동 중 비전제시는 공급체인 리더십에 영향을 미치지 않았다.

• 한국토양비료학회지
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• 제36권4호
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• pp.181-192
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• 2003

기상 자료와 토양 수리 특성을 입력하여 토양수분의 수직 이동 및 분포를 예측할 수 있는 수치모형을 개발하고, 이 모형을 검정하기 위해 중동사양토를 대상으로 추정한 결과와 중성자 산란법에 의해 측정한 수분단면을 비교하였다. 이 모형에서 토양수분 포텐셜을 기준으로 한 Richards 방정식의 해를 predictor-corrector 격자에 투영한 음함수 유한차분법에 의해 구하였다. 이 모형에서는 토양단면의 수리특성은 균질하고, 토양수분은 등온적으로 흐르고, 수분이력현상은 고려하지 않고, 수증기 및 열 이동은 일어나지 않고, 빗물은 토양 단면에 부분 치환원리에 의해 분배된다고 가정하였다. 이 모형의 입력 자료는 크게 강우량, 최고 및 최저 기온, 상대습도 및 일사량의 일일 기상자료와 불포화 수리전도도 및 수분보유 특성 함수를 추정하기 위한 토양 수리 자료로 구분하였다. Chebyshev 다항식과 최소 자승차를 이용하여 추정한 토양 수리 다항식은 입력 자료와 매우 잘 일치하였다. 다양한 지표 및 하부 경계조건에서 53일 동안 상대적으로 시간증가분을 크게 하여 추정한 Richards 방정식의 해인 토양수분 수직 단면은 지표 10 cm를 제외하고는 중성자 산란법에 의해 측정한 결과와 잘 일치하였다.

• Annals of Clinical Neurophysiology
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• 제4권1호
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• pp.16-20
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• 2002

Background and Objective : Epileptic seizures are frequent complication of lobar hemorrhage. We investigated the factors affecting development of epilepsy following spontaneous lobar ICH. Methods : From January 1986 to July 1999, 114 patients were admitted to Chungnam National University Hospital with spontaneous lobar ICH. We analyzed 75 patients. Excluded were no follow-up(8 patients) and patients died within few days(31 patients). All the patient was followed up at least two years aside from two patients who underwent epileptic seizure and died five and eight months later each. Medical history was obtained through medical record and by telephone interview. Statistical analyses were performed using Chi-square test, Student's t - test, Fisher's exact test. Results : Seizure occurred in 19 patients. As three patients had previous history of seizures, 16 patients(22.2%) showed first onset early- and late-seizures. Early seizure occurred in 14 patients(19.4%). Three out of 14 were heavy alcoholics. Five patients developed late recurrent seizure 61 days to 800 days after the early seizure. Late seizure with no acute seizure occurred in two patients. The types of seizure were diverse as generalized tonic clonic seizure(10), partial seizure with secondary generalization(5), and complex partial seizure(1). The common risk factors for lobar ICH were hypertension(HT), arteriovenous malformation(AVM), and excessive use of alcohol. We could not find any causes in 23 patients. Although size of hematoma, age of onset, sex, incidence of HT or AVM were not different between patients with seizure and without seizure, the history of excessive alcohol drinking was more frequent in patients with seizure. Five patients with late recurrent seizure had ICH involving temporal area. Conclusions : This study suggests that the risk of seizure in patients with lobar ICH was increase in chronic alcoholics and patient with late recurrent seizure had ICH frequently involving temporal area.

• 산업경영시스템학회지
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• 제40권2호
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• pp.78-91
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• 2017

In this study, we conducted a comparative study on user's perception and behavior on public system service (PSS) using institutionalism theory and MGA (multi-group analysis) methodology. In particular, this study focuses on how institutional isomorphism is applied to public system services and how MGA can be implemented correctly in a variance based SEM (structural equation model) such as PLS (partial least square). A data set of 496 effective responses was collected from pubic system users and an empirical research was conducted using three segmented models categorized by public proximity theory (public firms = 113, government contractors = 210, private contractors = 173). For rigorous group comparisons, each model was estimated by the same indicators and approaches. PLS-SEM was used in testing research hypotheses, followed by parametric and non-parametric PLS-MGA procedures in testing categorical moderation effects. This study applied novel procedures for testing composite measurement invariance prior to multi-group comparisons. The following main results and implications are drawn : 1) Partial measurement invariance was established. Multi-group analysis can be done by decomposed models although data can not be pooled for one integrated model. 2) Multi-group analysis using various approaches showed that proximity to public sphere moderated some hypothesized paths from quality dimensions to user satisfaction, which means that categorical moderating effects were partially supported. 3) Careful attention should be given to the selection of statistical test methods and the interpretation of the results of multi-group analysis, taking into account the different outcomes of the PLS-MGA test methods and the low statistical power of the moderating effect. It is necessary to use various methods such as comparing the difference in the path coefficient significance and the significance of the path coefficient difference between the groups. 4) Substantial differences in the perceptions and behaviors of PSS users existed according to proximity to public sphere, including the significance of path coefficients, mediation and categorical moderation effects. 5) The paper also provides detailed analysis and implication from a new institutional perspective. This study using a novel and appropriate methodology for performing group comparisons would be useful for researchers interested in comparative studies employing institutionalism theory and PLS-SEM multi-group analysis technique.