• 한국환경과학회지
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• 제33권6호
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• pp.417-425
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• 2024

This study investigated the effects of various planting models on the joint cultivation of eggplant (Solanum melongena) and marigold (Tagetes erecta)to enhance sustainable rooftop urban farming. Rooftop agriculture is increasingly valued to boost the food supply and benefit the environment. Integrating such practices into urban planning is viewed as a way to sustainably manage resources and improve the food-energy-water cycle in cities. The experiment was conducted on a rooftop in Chungju, South Korea from May to August. Four different planting setups were used: central eggplant with peripheral marigold (SET), eggplant with a protective net (SIC), central marigold with peripheral eggplant (TES), and control with only eggplant (CON S). These models tested the effects of companion planting versus monoculture using a lightweight soil mix ideal for rooftops made from cocopeat and perlite and enriched with organic fertilizer. Measurements focused on soil conditions and plant health and assessed soil temperature, moisture, conductivity, plant height, width, and leaf size. The results indicated that the SET modelyielded the best growth. This setup benefited from marigold pest control properties and its ability to improve soil conditions by enhancing moisture and nutrient levels and aiding eggplant growth. These findings underscore the potential of mixed planting on rooftops and suggest that such approaches can be effectively incorporated into urban agriculture to boost yield and environmental sustainability. This study supports the idea that diverse planting methods can significantly affect plant growth and promote urban greening and food security.

• 대한융합한의학회지
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• 제6권1호
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• pp.37-42
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• 2024

Objectives: This study aims to evaluate the clinical validity of the system by conducting a clinical study to assess the diagnostic agreement between the system and Korean medical doctors. Methods: This study was conducted from September 7, 2023, to December 7, 2023, across five Korean medicine institutions, involving 100 adult participants aged 20-64 who consented to participate. Participants first entered their symptoms into a web-based program, which utilized an AI-based algorithm to diagnose 36 types of pattern differentiation. Subsequently, Korean medical doctors conducted face-to-face diagnoses using the same 36 types. The diagnostic agreement between the system and the doctors' diagnoses was analyzed using descriptive statistical analysis, and the results were expressed as a percentage agreement. Results: Analysis of the diagnostic data from 100 participants revealed that the web-based diagnosis support system identified an average of 7.76±0.79 patterns per patient, while Korean medical doctors identified an average of 7.99±0.10 patterns per patient. The diagnostic agreement between the system and the doctors showed an average of 7.08±1.08 patterns per patient, with an overall diagnostic agreement rate of 88.57±13.31%. Conclusion: This study developed a web-based diagnosis support system for traditional Korean medicine and evaluated its clinical validity by assessing diagnostic agreement. Comparing the diagnoses of the system with those of Korean medical doctors for 100 patients, the system showed an approximately 89% agreement rate with the clinical diagnoses. The system holds potential for aiding Korean medical doctors in pattern differentiation diagnosis in clinical practice.

• 지구물리와물리탐사
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• 제27권2호
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• pp.91-107
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• 2024

단일 채널 탄성파 탐사는 소규모 자료획득 시스템으로 지하 지질구조를 파악하는 효과적인 방법이다. 영벌림거리 혹은 가까운 벌림거리를 사용하여 획득한 단일 채널 탄성파 자료는 연직 방향의 지하 지질구조를 직접 반영하므로 탄성파 단면도를 효과적으로 작성할 수 있다. 그러나 공통중간점 중합 과정을 적용할 수 없어 신호 대 잡음비가 매우 낮으므로 단면에 나타나는 반사 구조의 정밀한 해석에 있어 중합 단면 대비 불리함을 가진다. 본 연구에서는 단일 채널 탄성파 자료의 신호 대 잡음비를 향상시키기 위해 특이 스펙트럼 분석을 기반으로 한 잡음 제거 및 신호 향상 방법을 제안한다. 기존의 특이 스펙트럼 분석 방법은 행렬의 특정 특잇값을 임의로 추출하여 자료 내에 있는 무작위 잡음을 제거하는 방식으로 수행되었으나, 이는 낮은 신호 대 잡음비나 이상 잡음이 있는 자료에 적용할 수 없다. 따라서 본 연구에서는 행렬의 특잇값을 최적화하고 저계수 근사를 수행하여 무작위 및 이상 잡음을 동시에 효과적으로 제거한다. 또한, 잡음 제거로 인한 신호 손실을 보정하고 탄성파 이벤트의 수평적 연속성을 향상시키기 위해 행렬의 고유 영상에 기반한 가중치를 계산하여 탄성파 단면의 품질을 향상시킨다. 본 연구에서 제안하는 기술의 적용성 및 우수성을 확인하기 위해 북극해 척치해저고원에서 획득한 단일 채널 스파커 탄성파 자료에 대한 자료 처리 실험을 수행하였으며, 수치 예제를 통해 매우 높은 수준의 신호 대 잡음비와 최소의 신호 손실을 가진 탄성파 단면을 얻을 수 있었다. 본 연구에서 제안하는 단일 채널 탄성파 자료 처리 기술은 향후 국내 연안지역의 해양개발과 해저 지질재해를 규명하기 위한 단일 채널 및 초고해상도 탄성파 탐사에 매우 효과적으로 기여할 것으로 기대된다.

• 한국과학교육학회지
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• 제26권3호
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• pp.393-405
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• 2006

본 연구에서는 고등학교 생물 I, '유전' 단원에서 Keller의 ARCS 전략 중, 특히 "주의집중"과 "만족감" 요소를 적용한, 의미 망 프로그램(Semantic Network Program)을 활용한 수업이 학생들의 학업성취도와 학습동기 향상에 미치는 효과를 분석하는 것을 연구의 목적으로 삼았다. 연구대상은 고등학교 2학년 실험집단 및 통제집단의 124명으로 구성되었고, 사전검사로 학업성취도 검사, 학습동기검사, 그리고 의미망 형성 검사를 실시한 후, 4주간에 걸쳐 6차시 동안 실험집단에게는 ARCS 전략 중 주의집중 전략을 적용한 의미망 프로그램을 활용한 유전 수업과 만족감 전략에 따른 의미망 제작 활동을, 통제집단에게는 교과서 중심의 강의식 수업을 처치하였다. 수업 처치에 따른 사후 검사 결과 동기전략을 적용한 의미망 프로그램을 활용한 수업은 강의식 수업보다 '주의집중과 만족감'을 높여 학생들의 인지구조에 새로운 지식을 효과적으로 연결시켜 생물 학업성취도를 향상시켰고(p<.001), 학생들의 유전관련 새로운 개념 형성에도 효과적인 것으로 나타났다(p<.001). 또한 본 연구에서 적용한 수업은 학생들이 생물 개념들을 구조지식으로 조직하여 이해함으로써, 기억효과를 높여 학습내용의 파지(retention)에 효과적이었다(p>.05). 실험집단의 심층면담 결과에서는 동기전략을 적용한 의미망 프로그램을 활용한 수업은 유전과 관련된 영상자료의 연결(link)로 호기심을 유발하여 주의집중이 잘 되었고, 직접 의미망을 제작해 봄으로써, 학습내용이 오랫동안 기억에 남아 문제해결에 효과적이었다는 긍정적인 반응을 보였다. 본 연구의 결과는 앞으로 고등학교 생물 I, '유전'단원에 대한 다양한 수업 전략을 모색하는데 의미있는 시사점을 제공해 줄 수 있을 것이다.

• 생물정신의학
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• 제18권3호
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• pp.148-158
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• 2011

Objectives The eye movement (EM) has been reported to play a role in enhancing the retrieval of episodic memories and reducing effects of fearful episodes in the past and worries for the futures. However, it is still unclear in the mechanism of EM in normal subjects. We examined the horizontal eye movement (HEM) effect using an aiding apparatus on mental health indices including negative and positive psychological factors, and psychophysiological measures such as heart rate variability and quantitative electroencepaholography (qEEG) in healthy subjects. Methods Twenty eight healthy subjects were recruited and randomly allocated into two groups : active HEM group and control group. The active HEM group conducted the HEM training with usual stress management audio-intervention using the apparatus inducing eye movement once a day for 14 days. The control group also conducted the same training once a day for 14 days, however, the saccadic eye movement was not included in this training. Psychological measurements, neurocognitive function tests, heart rate variability measurement and qEEG were conducted before and after the training in both groups. Results In the active HEM group, sleep status using Sleep Quality Scale (SQS) positive factors significantly increased after the training. By contrast, scores on the negative items of Psychological Well-Being Scale (PWBS), and negative items of the Life Orientation Test-Revised (LOT-R) were significantly decreased after the training. The percentage of delta amplitude (1-3 Hz) in qEEG significantly decreased after the HEM training. The percentage of alpha amplitude (8-12 Hz) significantly increased after HEM training. The change of delta amplitude in the active HEM group was positively correlated with the change of sleep satisfaction of Visual Analogue Scale (VAS), and the change of alpha amplitude was negatively correlated with depression of VAS, anxiety of VAS and Beck Anxiety Inventory (BAI). Conclusions The HEM training improved sleep quality and well-being, and sense of optimism. The HEM training also increased alpha amplitude and decreased delta amplitude in qEEG. The qEEG changes were well correlated with subjective improvement of mental health indices in healthy subjects. These results suggest some evidences that HEM training using the apparatus that induces EM would be helpful in improving subjective mental health in healthy subjects. Further study with larger samples size would be needed.

• Asian Pacific Journal of Cancer Prevention
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• 제15권24호
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• pp.10943-10947
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• 2015

Background: This study aimed to understand the relationship between knowledge level and behavior on breast care in Chinese students, so as to provide strategies for improving the health education of breast care and subsequently for aiding in breast cancer prevention. Materials and Methods: A self-designed questionnaire was used to evaluate breast care knowledge level and characterize related behavior. Correlation analysis was conducted for the knowledge level and behavior. The study was carried out using 597 female undergraduate students in medical and non-medical colleges in Wuhu, China. Results: The average score of breast care knowledge was $5.32{\pm}1.68$ ($5.62{\pm}1.68$ and $5.00{\pm}1.68$ for medical and non-medical students, respectively), with a greater score value for sophomores ($5.59{\pm}1.72$) than freshmen ($5.18{\pm}1.65$). The average score of breast care behavior was $2.21{\pm}1.13$, again with a greater value in sophomores ($2.37{\pm}1.15$) than freshmen ($2.21{\pm}1.13$). A significant positive correlation (r=0.231, p<0.01) between knowledge scores and behavior scores was observed. In addition, various factors, including paying attention to breast care information, receiving breast self-examination guidance, TV program and Internet, were found to influence breast care knowledge. Conclusions: In general, female undergraduate students lack of self-awareness of breast care with a low rate of breast self-examination. It is necessary to carry out health education to improve early detection of breast cancer.

• 치과방사선
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• 제29권1호
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• pp.149-159
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• 1999

Purpose: The purpose of this study was to evaluate cervical lymph node metastasis of oral squamous cell carcinoma patients by MRI film and neural network system. Materials and Methods: The oral squamous cell carcinoma patients(21 patients. 59 lymph nodes) who have visited SNU hospital and been taken by MRI. were included in this study. Neck dissection operations were done and all of the cervical lymph nodes were confirmed with biopsy. In MR images. each lymph node were evaluated by using 6 MR imaging criteria(size. roundness. heterogeneity. rim enhancement. central necrosis, grouping) respectively. Positive predictive value. negative predictive value. and accuracy of each MR imaging criteria were calculated. At neural network system. the layers of neural network system consisted of 10 input layer units. 10 hidden layer units and 1 output layer unit. 6 MR imaging criteria previously described and 4 MR imaging criteria (site I-node level II and submandibular area. site II-other node level. shape I-oval. shape II-bean) were included for input layer units. The training files were made of 39 lymph nodes(24 metastatic lymph nodes. 10 non-metastatic lymph nodes) and the testing files were made of other 20 lymph nodes(10 metastatic lymph nodes. 10 non-metastatic lymph nodes). The neural network system was trained with training files and the output level (metastatic index) of testing files were acquired. Diagnosis was decided according to 4 different standard metastatic index-68. 78. 88. 98 respectively and positive predictive values. negative predictive values and accuracy of each standard metastatic index were calculated. Results: In the diagnosis of using single MR imaging criteria. the rim enhancement criteria had highest positive predictive value (0.95) and the size criteria had highest negative predictive value (0.77). In the diagnosis of using single MR imaging criteria. the highest accurate criteria was heterogeneity (accuracy: 0.81) and the lowest one was central necrosis (accuracy: 0.59). In the diagnosis of using neural network systems. the highest accurate standard metastatic index was 78. and that time. the accuracy was 0.90. Neural network system was more accurate than any other single MR imaging criteria in evaluating cervical lymph node metastasis. Conclusion: Neural network system has been shown to be more useful than any other single MR imaging criteria. In future. Neural network system will be powerful aiding tool in evaluating cervical node metastasis.

• Clinical and Experimental Reproductive Medicine
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• 제40권2호
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• pp.100-105
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• 2013

Objective: The aim of this study was to investigate the effect of insulin sensitizing agents on hormonal and metabolic parameters as well as menstrual patterns in women with polycystic ovary syndrome (PCOS). Methods: One hundred and twenty-three patients with PCOS were included. Metformin was administered to patients at 1,500 mg or 1,700 mg daily for 3 months. If the patients had no improvement of the menstrual cycle or metformin-related adverse effects developed, the patients changed medication to a daily dose of either 15 mg pioglitazone or up to 45 mg. Then resumption of a regular menstrual cycle or recovery of ovulation was evaluated. Hormonal and metabolic profiles were compared between the response and non-response group to insulin sensitizing agents. Results: One hundred and five patients with PCOS were treated with metformin for 3 months. Forty-eight patients (45.7%) showed improvement of menstrual cycle regularity after 3 months of metformin use, whereas 57 patients (54.3%) had no change. The mean free testosterone measured after 3 months of treatment was significantly lower in metformin responders than in non-responders. The other parameters did not differ between the groups. Of the 23 patients who used pioglitazone for 3 to 6 months, 19 patients (82.6%) showed improvement in their menstrual cycles. Conclusion: Metformin treatment seems to be effective for the improvement of menstrual cyclicity irrespective of insulin resistance in women with PCOS. When metformin related adverse effect occurred, pioglitazone would be effective for aiding the resumption of the menstrual cycle.

• 한국항해항만학회지
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• 제34권3호
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• pp.213-220
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• 2010

최근 IMO에서는 산적화물선 및 유조선, 대형여객선에 이어 '일반화물선의 안전(general cargo ships safety)'에 대한 논의의 필요성이 제기(IMO, 2006a)되고 있으며, 본격적인 논의를 위한 준비 작업으로 국제선급협회(IACS)를 통한 공식안전성평가(Formal Safety Assessment, 이하 FSA) 작업이 수행되고 있다. FSA란 위험도(risk)분석과 비용-효과 평가(cost-benefit assessment)를 바탕으로 인명, 해양환경 및 재산의 보호를 포함한 해사안전의 향상을 목적으로 한 구조화되고 체계적인 방법론으로서 새로운 법규의 평가, 기존법규와 새로운 (제안) 법규와의 비교, 그리고 여러 이해관계자의 공감대 형성을 통해 법규 변경/개발을 용이하게 하는 수단이다(IMO, 2007). 본 연구는 국적일반화물선의 안전성 평가를 위한 수단으로서 IMO FSA방법론의 유용성을 확인하고, 향후 IMO에서의 '일반화물선 안전'에 대한 논의에 대응하기 위한 기초자료의 확보를 목적으로 하고 있다. 본 논문에서는 국적일반화물선에 대한 FSA의 1, 2 단계에 해당하는 위험요소 식별(Hazard identification) 및 사고시나리오에 대한 위험도 분석(Risk analysis) 결과를 중심으로 소개하였다.

• Asian-Australasian Journal of Animal Sciences
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• 제32권1호
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• pp.31-37
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• 2019

Objective: At least eight local duck breeds have been recognized and documented as national germplasm of Indonesia so far. It is necessary to genetically characterize the local duck breeds for aiding conservation and future improvement strategies. Thus, this study was carried out to assess genetic diversity and phylogenetic relationship of eight local duck populations of Indonesia using microsatellite markers. Methods: In total, 240 individuals (30 individuals each population) from Alabio (AL), Bayang (BY), Magelang (MG), Mojosari (MJ), Pegagan (PG), Pitalah (PT), Rambon (RM), and Turi (TR) duck populations were genotyped using 22 microsatellite markers. Results: The results showed a moderate level of genetic diversity among populations, with a total of 153 alleles detected over all loci and populations, ranging from 3 to 22 alleles per locus. Observed (Ho) and expected heterozygosity (He), as well as polymorphism information content over all loci and populations were 0.440, 0.566, and 0.513, respectively. Heterozygote deficiency in the overall populations ($F_{IT}=0.237$), was partly due to the heterozygote deficiency within populations ($F_{IS}=0.114$) and moderate level of genetic differentiation among populations ($F_{ST}=0.137$). The most diverse population was MG (He = 0.545) and the least diverse population was AL (He = 0.368). The majority of populations were relatively in heterozygote deficiency (except AL), due to inbreeding. The genetic distances, phylogenetic trees, and principal coordinates analysis concluded that the populations can be grouped into two major clusters, resulting AL, MG, and MJ in one cluster separated from the remaining populations. Conclusion: The present study revealed a considerable genetic diversity of studied populations and thus, proper management strategies should be applied to preserve genetic diversity and prevent loss of alleles.