• Restorative Dentistry and Endodontics
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• 제49권1호
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• pp.8.1-8.12
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• 2024

Objectives: The purpose of this study was to evaluate the effect of Dental Practicality Index (DPI) training using an online video on the treatment planning decisions and confidence level of dental undergraduates (DUs). Materials and Methods: Ninety-four DUs were shown 15 clinical case scenarios and asked to decide on treatment plans based on 4 treatment options. The most appropriate treatment plan had been decided by a consensus panel of experienced dentists. DUs then underwent DPI training using an online video. In a post-DPI-training test, DUs were shown the same clinical case scenarios and asked to assign the best treatment option. After 6 weeks, DUs were retested to assess their knowledge retention. In all 3 tests, DUs completed the confidence level scale questionnaire. Data were analyzed using the related-samples Wilcoxon signed rank test and the independent-samples Mann-Whitney U test with the level of significance set at p < 0.05. Results: DPI training significantly improved the mean scores of the DUs from 7.53 in the pre-DPI-training test to 9.01 in the post-DPI-training test (p < 0.001). After 6 weeks, the mean scores decreased marginally to 8.87 in the retention test (p = 0.563). DPI training increased their confidence level from 5.68 pre-DPI training to 7.09 post-DPI training. Conclusions: Training DUs using DPI with an online video improved their decision-making and confidence level in treatment planning.

• 한국작물학회지
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• 제47권
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• pp.200-215
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• 2002

There are some international standards and organization controling the quality characteristics of varieties and seeds such as UPOV, OECD, ISTA, AOSA. The National List system to check variety performance such as quality characteristics of plant varieties and seeds was established by each countries. The UPOV (International Union for the Protection of New varieties of Plant) regulates the requirement of plant variety protection that is distinctness (D), uniformity (U), stability (S) (here in after called DUS), Novelty and Denomination, and some quality characteristics are used to examine the requirement of plant variety protection by each crops. OECD (Organization for Economic Cooperation Development) seed scheme regulates the seed certification for seed trade between countries. ISTA (International Seed Testing Association) and AOSA(Association for Official Seed Analyst) regulates the seed analysis standard and methods. Most of the countries in Europe has the National List system, which check the value for cultivation and use(VCU), that is to say, variety performance such as yield, quality and stress to environment. All the seeds should be enlisted in the National List before sell the seed in their country. All the quality characteristics checked variety performance are for instance, amylose and amylopectin content in rice, molting quality, $\beta$-glucan, protein in barley, protein and sugar content in soybean, sugar and amylopectin content in corn etc. Conditions for the protection of new variety of plant are DUS. Quality characteristics may be the important characteristics and used to check DUS in crop by crop. It is very important to develop a new characteristics and establish standard method fur examine the VCU and DUS test for each crop.

• Molecules and Cells
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• 제19권3호
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• pp.428-435
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• 2005

This study was carried out to assess the potential of SSR markers for variety identification by comparing SSR markers and morphological traits in tests of distinctiveness, uniformity, and stability (DUS) of pepper (Capsicum annuum L.) varieties. Twenty-seven SSR markers were polymorphic in 66 pepper varieties, revealing a total of 89 alleles. Average polymorphism information content (PIC) value was 0.529, ranging from 0.03 to 0.877. Cluster analysis of the band patterns separated the varieties into three groups corresponding to varietal types. Morphological trait-based clustering showed some degree of similarity to dendrogram topologies based on the SSR index. However, no significance correlation was found between the SSR and morphological data. SSR markers could be used to complement a DUS test of a candidate variety and to select complimentary varieties by pre-screening existing varieties in the context of protecting new varieties of pepper.

• 생물환경조절학회지
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• 제15권4호
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• pp.406-411
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• 2006

뉴기니아 봉선화(Impatiens hawkeri)는 광조건에 따라 생리적 반응이 매우 민감한 것으로 알려져 있다. 이러한 현상 때문에 신품종 보호 재배심사(DUS test)시 나타나는 여러 증상들이 유전적인 요인에 의한 것인지 혹은 생리적 증상인지를 판단하는데 어려움이 따른다. 이러한 어려움을 극복하기 위하여 뉴기니아 봉선화 'Fishlimp 149'를 비가림 하우스에 정식하고 광도조건에 따른 생육 및 화색발현을 구명하기 위하여 몇 가지 광도조건의 처리를 하였다. 실험결과 대조구 ($1,010{\mu}mol{\cdot}m^{-2}{\cdot}s^{-1}$)에 비해 차광 1($599{\mu}mol{\cdot}m^{-2}{\cdot}s^{-1}$) 및 차광 2($88{\mu}mol{\cdot}m^{-2}{\cdot}s^{-1}$) 처리구에서 초장, 초폭, 잎 크기 및 소화경 등이 현저히 증가되었다. 그러나 가장 광도가 낮은 차광 3($30{\mu}mol{\cdot}m^{-2}{\cdot}s^{-1}$)에서는 오히려 이들이 대조구에 비해 감소되었다. 개화특성 조사에서는 차광 1처리가 화경, 상부 꽃잎폭, 측면 꽃잎폭, 하부 꽃잎길이 등에서 가장 좋은 결과를 보였다. 안토시아닌 함량의 경우 줄기, 잎 및 소화경에서는 차광에 의해 감소되었으나 소화경의 경우 차광 1처리에서 가장 높은 결과를 보였다. 이상의 결과를 종합해 볼 때, 차광 1처리가 뉴기니아 봉선화의 생장특성을 조사하는데 가장 적절한 것으로 판단되며, 생육과정 중 나타나는 안토시아닌 축적은 유전적인 요인이 아닌 환경적인 요인에 의한 생리적인 현상인 것으로 생각된다.

• 한국구조물진단유지관리공학회 논문집
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• 제26권6호
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• pp.167-174
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• 2022

이 연구의 목적은 감쇠능력이 우수한 재료로 구성된 DUS(damping-up system)의 동적특성을 평가하고 일반 행어볼트와의 성능을 비교하는데에 있다. 주요변수는 고무의 종류 및 경도(𝜂_H) 그리고 프리스트레스력(고무의 응력-변형률 관계에서 압축변형률(𝜂_R)로부터 환산된 값)이다. 동적특성은 고유진동수(𝜔_n), 최대 응답가속도(A_m), 증폭계수(𝛼_p), 최대 상대변위(𝚫_m) 및 감쇠비(𝜉_D)로부터 평가되었다. 실험결과 DUS의 A_m, 𝛼_p 및 𝚫_m 는 일반 행어볼트 보다 각각 46.3%, 46.6% 및 62.9% 낮았으며, 𝜉_D는 3.89배 높았다. 특히 DUS의 𝛼_p 는 평균 1.3으로서 KDS 41 17 00의 강성요소에서 제시하는 값과 비슷한 반면, 일반 행어볼트의 𝛼_p 는 2.45로 연성요소에서 제시하는 값과 비슷하였다. 결과적으로 DUS의 최적상세는 𝜂_H가 50인 NR(natural rubber)과 45인 EPDM(ethylene propylene diene monomer)을 권장하며, 이들의 𝜂_R는 5%로 추천한다.

• 한국건설순환자원학회논문집
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• 제8권1호
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• pp.49-55
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• 2020

본 연구에서는 바텀애시 재활용 인공토양을 적용한 옥상녹화 유니트 시스템의 표면 온도변화를 계절별로 측정하여 바텀애시 재활용 인공토양의 열특성을 분석한 결과, 바텀애시 인공경량토양이 기존 토양보다 우수한 열차단 특성이 있음을 확인하였다. 또한, 기존 옥상녹화 유니트 시스템과 개발 옥상녹화 유니트 시스템의 열차단 효과를 분석하기 위해 계절별 일교차를 측정한 결과 기존 녹화 유니트 시스템은 현장 포설형 녹화시스템보다 열차단 효과가 낮은 반면 격막을 탈거하여 바텀애시 인공경량토양을 연속된 층으로 형성하는 개발 유니트 녹화 시스템은 기존 현장 포설형 녹화시스템과 유사한 열차단 효과를 갖는 것으로 분석되었다.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제12권9호
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• pp.4166-4182
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• 2018

We consider the Device-to-Device (D2D) communications in cellular networks where each cellular user (CU) shares the same resource with multiple D2D users (DUs). In this paper, we aim to maximize the energy efficiency (EE) of the D2D networks, subject to an interference constraint required by the CU. Since the cellular and D2D communications belong to different networks, we consider to incentivize base station (BS) while assisting the DUs. To this end, we propose a Stackelberg game based interference pricing framework for the considered D2D communications in cellular networks. Unlike most of the existing methods, we use interference pricing framework to jointly address the EE resource allocation problem and the interference management in our networks rather than only improve the EE of the DUs or protect cellular networks. In particular, BS and all the users do not need all channel state information, which is more realistic in practice. In addition, two different pricing strategies are also proposed. Based on the two strategies, we analyze the equilibrium of the game. Moreover, in the first strategy, the upper and lower boundaries of the interference price are obtained. The closed-form expression is gained with a backward induction for the second strategy. Both offer valuable insights to the considered scenarios. Finally, compared with the existing work, the EE of the D2D communications is significantly improved. The advantageous performance of our scheme are demonstrated by the simulation results.

• 한국환경농학회지
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• 제42권4호
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• pp.450-456
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• 2023

The National Forest Seed and Variety Center aims to write a manual for cultivation and characteristic inspection of new seed varieties in Korea, serving dual purposes. The first is the enhancement of the test guidelines, particularly the distinctness, uniformity and stability (DUS) test, for new seed variety, where research and examination are conducted based on the test guidelines. However, if the crop-specific test guidelines are initially reorganized, the details are unclear. Therefore, it seeks to maintain a written record to prevent confusion when the person in charge is changed. The second is to encourage the development of new varieties. By incorporating general characteristics and cultivation techniques in the manual, it seeks to encourage breeders to develop new varieties. Additionally, it serves as an important chronological record of the creation process, thereby helping future manual authors. This article introduces the current status of new plant variety protection and outlines the significance of creating a manual for cultivation and characterization of Actinidia arguta for screening new varieties.

• Journal of Korean Neurosurgical Society
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• 제61권1호
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• pp.51-59
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• 2018

Objective : The feasibility and usefulness of transradial catheterization for coronary and neuro-intervention are well known. However, the anatomical change in the catheterized radial artery (RA) is not well understood. Herein, we present the results of ultrasonographic observation of the RA after routine transradial cerebral angiography (TRCA). Methods : Patients who underwent routine TRCA with pre- and post-procedure Doppler ultrasonography (DUS) of the catheterized RA were enrolled. We then recorded and retrospectively reviewed the diameter and any complicated features of the RA observed on DUS, and the factors associated with the diameter and complications were analyzed. Results : A total of 223 TRCAs across 181 patients were enrolled in the current study. The mean RA diameter was 2.48 mm and was positively correlated with male gender (p<0.001) and hypertension (p<0.002). The median change in diameter after TRCA was less than 0.1 mm (range, -1.3 to 1.2 mm) and 90% of changes were between -0.8 and +0.7 mm. Across 228 procedures, there were 12 cases (5.3%) of intimal hyperplasia and 22 cases (9.6%) of asymptomatic local vascular complications found on DUS. Patients with abnormal findings on the first procedure had a smaller pre-procedural RA diameter than that of patients without findings (2.26 vs. 2.53 mm, p=0.0028). There was no significant difference in the incidence of abnormal findings for the first versus subsequent procedures (p=0.68). Conclusion : DUS identified the pre- and post-procedural diameter and local complications of RA. Routine TRCA seems to be acceptable with regard to identifying local complications and changes in RA diameter.

• 한국식물병리학회지
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• 제13권1호
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• pp.37-45
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• 1997

Disease incidence (DI), pre-emergence damping-off (PDO), days until the first symptom appeared (DUS), disease progress curve (DPC), and area under disease progress curve (AUDPC) were investigated in vivo after sowing ginseng seeds in each of 37 ginseng-cultivated soils which were sampled from 4 regions in Korea. Non linear fitting parameters, A, B, K and M, were estimated from the Richards' function, one of the disease progress models, by using the DI at each day from the bioassay. Inter- and intra-relationships between disease variables and stand-missing rate (SMR) in fields were investigated by using the simple correlation analysis. Disease variables of the root rot were divided into two groups: variables related to disease incidence, e.g., DI, AUDPC and A parameter, and variables related to disease progress, e.g., B, K and M parameters. DI, AUDPC, and DUS had significant correlations with SMR in ginseng fields, and then it showed that the disease development in vivo corresponded with that in fields. Soil samples could be separated into 3 and 4 groups, respectively, on the basis of the principal component 1 (PC1) and the principal component 2 (PC2), which were derived from the principal component analysis (PCA) of Richards' parameters, A, B, K and M. PC1 accounted for B, K and M parameters, and PC2 accounted for A parameter.