• Journal of Mechanical Science and Technology
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• 제19권9호
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• pp.1711-1719
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• 2005

In an electro statically actuated nanoelectromechanical system (NEMS) resonator, it is shown that both the resonance frequency and the resonance quality (Q) factor can be manipulated. How much the frequency and quality factor can be tuned by excitation voltage and resistance on a doubly-clamped beam resonator is addressed. A mathematical model for investigating the tuning effects is presented. All results are shown based on the feasible dimension of the nanoresonator and appropriate external driving voltage, yielding up to 20 MHz resonance frequency. Such parameter tuning could prove to be a very convenient scheme to actively control the response of NEMS for a variety of applications.

• 한국식품영양학회지
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• 제22권1호
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• pp.57-62
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• 2009

The current exploratory study attempted to investigate the levels of expected and perceived service quality of in-flight meals. A questionnaire was developed following extensive literature review and in-depth interviews. The survey was conducted on board a flight by international passengers and also by passengers in the trans lounge waiting for connecting flights between October 21, 2005 through October 30, 2005. Out of the 450 questionnaires administered, a total of 319 completed questionnaires were returned, yielding a response rate of 89.6%. The 20 items representing the service quality factor of in-flight meals were analyzed, resulting in four distinct dimensions-food quality, employee service, cleanliness and reliability. In all dimensions, customer expectation was higher than the perceived level of service and the service quality of Korean based airlines was higher than that compared to foreign based airlines. There were differences in the perceived service quality of in-flight meals according to the demographics of the respondents. The results of this study can be beneficial from a theoretical and practical point of view by providing empirical data that measures the service quality of in-flight meals.

• 한국자원식물학회지
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• 제25권1호
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• pp.24-30
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• 2012

본 품종들은 우리나라 남부지방에 적응한 양질유, 양질막 다수성 품종을 육성하기 위하여 Erra(female)와 Tower(male)를 인공교배하여 육성한 양질유, 양질박, 다수성 품종으로서 목포51호, 목포52호라는 계통명을 부여하여 지방 적응 연락 시험 및 농가 실증 시험을 거쳐서 장려 품종(내한유채, 영산유채)으로 결정된 품종이다. 특히 본 품종들은 한 조합 내에서 장수, 다분지, 다협, 다립 품종으로 수량 형질이 우수하며, 유질에서 지방산 조성이 극히 양호하며 불량 지방산은 전혀 함유치 않고 양질 지방산인 oleic acid과 linoleic acid이 80% 이상 함유된 양질유 품종이며, 박에서도 glucosinolate가 전혀 없는 무독박 품종이다. 또한 생산력은 전국평균 16~22% 증수된 다수성 성분 육종 품종들이다.

• 한국약용작물학회지
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• 제10권5호
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• pp.419-422
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• 2002

참당귀 신품종 "안풍"은 작물시험장에서 지역수집종을 개체 및 집단선발하여 육성한 품종이다. 1999년부터 2001년까지 수원, 평창, 봉화 3지역에서 지역적응시험을 실시한 결과 저추대 고품질 다수성으로 인정되어 2001년 농촌진흥청 농작물직무육성 신품종선정심의위원회에서 신규품종으로 결정되어 품종보호출원을 하였다. 안풍의 주요 특성은 다음과 같다. 1. 엽색은 녹색이고 줄기색은 녹색에 자색을 띠며 꽃색은 적자색이고 종피색은 담갈색이다. 뿌리의 표피는 황갈색이고 육질은 백색이다. 2. 초장은 만추당귀 보다 길며 엽수는 비슷하였으나 생육기간중 지상부 생육은 만추당귀에 비하여 양호하였다. 뿌리는 만추당귀에 비하여 근장이 길고 근경이 굵으며 지근수가 많아 주당 건근중이 무거웠다. 3. 점무늬병은 만추당귀와 비슷하였으나 뿌리썩음병은 다소 적었다. 응애는 만추당귀와 비슷하였다. 4. 온상육묘이식 재배시 1년차에 안풍의 추대율은 0.6%로 만추당귀 0.3%보다는 다소 높았으나 진부재래 49.3%보다 낮았다. 노지육묘이식 재배시 2년차에 추대 및 개화되는 정도는 $0{\sim}15%$정도이다. 5. 3개지역 3년간 안풍의 평균수량은 3,630 kg/ha로 만추당귀 3,270 kg/ha보다 11% 증수되었다. 6. 안풍의 엑스함량은 46.3%, 데쿠루신은 3.48%, 데쿠루시놀 안젤라이트는 2.79%로 주요성분 모두 만추당귀 보다 높았다.

• Journal of Ginseng Research
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• 제22권1호
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• pp.11-17
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• 1998

To develop a new ginseng varieties with good quality and high yielding, a lot of individual ginseng plants were selected in the farmer's fields in 1972. Among them, a promising line, 7259-3-1, has been developed through comparative cultivation of several lines selected with pure line separation of local races in Korea Ginseng '||'&'||' Tobacco Research Institute. Preliminary and advanced yield trials were performed for 8 years. It was then designated as "KG 101" and tested in the regional yield and adaptation trials for 10 years (1981-1990). KG101 has a green stem with light violet and orange-yellow fruit and flowers 3-7 days later than local race, Takyungjong. Taproot of KG101 was longer than local race Jakyungjong, and root yield of KG101 was 9% higher than local race Jakyungjong. In red ginseng quality, the rates of Chun-Jeesam (Chun and Jee means 1st and 2nd grade, respectively) were 22.3% and 9.4% for KG101 and Jakyungjong, respectively. In these results, it was clarified that KG101 was superior ginseng line with good quality.y.

• 한국육종학회지
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• 제40권1호
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• pp.84-87
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• 2008

"고강"은 고품질 내병 다수성 지황 개발을 목표로 지황1호 실생 집단에서 우량 개체를 선발, 증식을 거친 후 2001~'02년 생산력 검정시험을 실시하였다. 그 결과 고품질이면서 병해에 강하고수량성이 높아 수원7호로 계통명을 부여한 후, 2003~'05년까지 3년간 지역적응시험을 실시한 결과 우수성이 인정되어 2005년 12월 직무육성 품종 심의회를 거쳐 "고강"으로 명명하였는바 그 주요특성을 요약하면 다음과 같다. 1. 고강의 초형은 지면에서 약간 솟아오르는 형태를 나타내며, 생육중기 완전 전개된 잎중 가장 어린잎들의 색깔은 안토시아닌 색소를 거의 띠지 않아 대비품종과 구별된다. 2. 고강은 지황1호에 비하여 잎이 크고 많으며, 뿌리가 굵고 길다. 3. 고강은 병에 대한 저항성도 비교적 강하여 생산의 안정성이 높은 품종이다. 4. 고강은 2003~'05년까지 3년간 실시한 지역적응시험결과 수원 등 3지역에서 모두 증수되는 것으로 나타났고, 3지역의 10a당 평균 수량은 1,186kg로 지황1호 대비 13% 증수하였다. 5. 고강은 지황의 주요성분인 catalpol과 엑스함량이 지황1호에 비하여 많은 고품질 품종이다.

• Membrane and Water Treatment
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• 제13권5호
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• pp.245-257
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• 2022

Water quality characteristics and their spatial variations in the Nakdong River were statistically analyzed by multivariate techniques including correlation analysis, CA, and FA/PCA based on water quality parameters for 17 sites over 2017-2019, yielding PI values for primary factors. Site 10 indicated the highest parameter concentrations, and results of pearson's correlation analysis suggest that non-biodegradable organic matter had been distributed on the site. Five clusters were identified in order of descending pollution levels: I (Ib > Ia) > II (IIa > IIb) > III. Spatial variations started from sub-cluster Ib in which Daegu city and Geumho-river are joined. T-P, PO4-P, SS, COD, and TOC corresponded to VF 1 and 2, which were found to be principal components with strong influence on water quality. Sub-cluster Ib was strongly influenced by NO3-N and T-N compared to other clusters. According to the PIs, water quality pollution deteriorated due to non-biodegradable organic matter, nitrogen- and phosphorus-based nutrient salts in the middle and lower reaches, illustrating worsening water pollution due to inflows of anthropogenic sources on the Geumho-river, i.e., sewage and wastewater, discharged from Site 10, at which there is a concentration of urban, agricultural, and industrial areas.

• 한국식품조리과학회지
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• 제27권6호
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• pp.735-743
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• 2011

This study examined physicochemical properties of rice grains and qualities of cooked white rice of the high yielding, Japonica type, specifically Druryechanbyeo and Boramchanbyeo, and of the Tongil-type, specifically Hanarumbyeo and Andabyeo. The changes of water absorption rate of rice grains, their textural properties and a sensory evaluation of the cooked rice s were analyzed. All varieties were short grain. The length and width of Tongil type rice grains larger than those of Japonica type. The water absorption of white rice grains increased rapidly until 1 hr when soaking and after that increased slightly. The water absorption of Druryechan grain was higher than that of the Boramchan. The sensory evaluation results showed that the Japonica type cooked rices had a higher value for overall quality than the Tongil type cooked rices. With regard to the textural properties of the cooked rices, the hardness of Boramchan and Hanarum varieties showed higher than that of Druyechan and Anda varieties. Adhesiveness, springiness and chewiness were not significantly different between varieties (p<0.05).

• 여성건강간호학회지
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• 제23권4호
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• pp.221-232
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• 2017

Purpose: This study aimed to conduct a systematic review and to describe characteristics of the birth experience assessment instrument. Methods: Literature related to the development of the birth experience assessment instrument was examined using a systematic review method. A literature search was conducted using the keywords as '[normal birth]; [$satisfac^*$ OR care quality]; [instrument OR scale] AND (development)' through PubMed, CINAHL, SCOPUS, PsycINFO, and RISS. The search used quality appraisal through QUADAS (Quality Assessment of studies of Diagnostic Accuracy included Systemic reviews) yielding 17 records. Results: The birth experience assessment instrument was categorized for instrumental characteristics: birth satisfaction (n=8), perception of labor experience (n=5), and birth care quality assessment in normal and operative birth experiences (n=4). Important key elements for content characteristics were as follows: nursing practice (n=10), pain control (n=5), environment (n=5), participation (n=4), and support (n=4). Conclusion: This study demonstrated that the birth experience instrument is appropriate for measuring quality of birth care in various clinical conditions. This review of the birth experience instrument reports that an appropriate psychometric tool for enhancing quality of birth care is important.

• 한국잠사곤충학회지
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• 제43권1호
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• pp.9-15
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• 2001

New Mulberry Cultivar, Milsungppong, was selected from F1 seedlings obtained by crossing the female, 4X Keomseolppong, and the male, Kaeryangppong. Local adaptability test has been carried out at five places(Suwon, Chunchun, Cheongju, Kongju and Sangju) for four years since 1992. Leaf quality was tested by silkworm rearing for two silkworm rearing seasons(spring and autumn) at Suwon in 1995. From these tests, Milsungppong was found to be superior to control cultivar, cultivar, Kaeryangppong, in productivity, rootability and shoot cold injury. The new cultivar, Milsungppong, has following agronomic characteristics as compared with Kaeryangppong, the most prevailing cultivar, Milsungppong, has following agronomic characteristics as compared with Kaeryangppong, the most prevailing cultivar in Korea It is triploid cultivar belonging to Morus bombycis KOIDZ with the leaf shape of five lobes, sprouting in spring nearly the same to the Kaeryangppong (Morus alba L.), high leaf yielding of 25% compared to Kaeryangppong (Morus alba L.) and the medium degree of cold resistance. It is adaptable to every where in Korea except the area cold injury broken out habitually. Milsungppong is recommended to rear silkworms not only in spring but also in autumn besides for young silkworms.